Move core/src/ up to core/.

This CL moves the core/src/ files up to core/ and fixes up the include guards,
includes and build files.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1800523005 .

20 files changed, 9324 insertions, 0 deletions

diff --git a/core/fpdfdoc/doc_action.cpp b/core/fpdfdoc/doc_action.cpp
new file mode 100644
index 0000000000..0af219e47e
--- /dev/null
+++ b/core/fpdfdoc/doc_action.cpp
@@ -0,0 +1,295 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include <vector>
+
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+
+CPDF_Dest CPDF_Action::GetDest(CPDF_Document* pDoc) const {
+  if (!m_pDict) {
+    return CPDF_Dest();
+  }
+  CFX_ByteString type = m_pDict->GetStringBy("S");
+  if (type != "GoTo" && type != "GoToR") {
+    return CPDF_Dest();
+  }
+  CPDF_Object* pDest = m_pDict->GetElementValue("D");
+  if (!pDest) {
+    return CPDF_Dest();
+  }
+  if (pDest->IsString() || pDest->IsName()) {
+    CPDF_NameTree name_tree(pDoc, "Dests");
+    CFX_ByteStringC name = pDest->GetString();
+    return CPDF_Dest(name_tree.LookupNamedDest(pDoc, name));
+  }
+  if (CPDF_Array* pArray = pDest->AsArray())
+    return CPDF_Dest(pArray);
+  return CPDF_Dest();
+}
+const FX_CHAR* g_sATypes[] = {
+    "Unknown",     "GoTo",       "GoToR",     "GoToE",      "Launch",
+    "Thread",      "URI",        "Sound",     "Movie",      "Hide",
+    "Named",       "SubmitForm", "ResetForm", "ImportData", "JavaScript",
+    "SetOCGState", "Rendition",  "Trans",     "GoTo3DView", ""};
+CPDF_Action::ActionType CPDF_Action::GetType() const {
+  ActionType eType = Unknown;
+  if (m_pDict) {
+    CFX_ByteString csType = m_pDict->GetStringBy("S");
+    if (!csType.IsEmpty()) {
+      int i = 0;
+      while (g_sATypes[i][0] != '\0') {
+        if (csType == g_sATypes[i]) {
+          return (ActionType)i;
+        }
+        i++;
+      }
+    }
+  }
+  return eType;
+}
+CFX_WideString CPDF_Action::GetFilePath() const {
+  CFX_ByteString type = m_pDict->GetStringBy("S");
+  if (type != "GoToR" && type != "Launch" && type != "SubmitForm" &&
+      type != "ImportData") {
+    return CFX_WideString();
+  }
+  CPDF_Object* pFile = m_pDict->GetElementValue("F");
+  CFX_WideString path;
+  if (!pFile) {
+    if (type == "Launch") {
+      CPDF_Dictionary* pWinDict = m_pDict->GetDictBy("Win");
+      if (pWinDict) {
+        return CFX_WideString::FromLocal(pWinDict->GetStringBy("F"));
+      }
+    }
+    return path;
+  }
+  CPDF_FileSpec filespec(pFile);
+  filespec.GetFileName(&path);
+  return path;
+}
+CFX_ByteString CPDF_Action::GetURI(CPDF_Document* pDoc) const {
+  CFX_ByteString csURI;
+  if (!m_pDict) {
+    return csURI;
+  }
+  if (m_pDict->GetStringBy("S") != "URI") {
+    return csURI;
+  }
+  csURI = m_pDict->GetStringBy("URI");
+  CPDF_Dictionary* pRoot = pDoc->GetRoot();
+  CPDF_Dictionary* pURI = pRoot->GetDictBy("URI");
+  if (pURI) {
+    if (csURI.Find(":", 0) < 1) {
+      csURI = pURI->GetStringBy("Base") + csURI;
+    }
+  }
+  return csURI;
+}
+FX_DWORD CPDF_ActionFields::GetFieldsCount() const {
+  if (!m_pAction) {
+    return 0;
+  }
+  CPDF_Dictionary* pDict = m_pAction->GetDict();
+  if (!pDict) {
+    return 0;
+  }
+  CFX_ByteString csType = pDict->GetStringBy("S");
+  CPDF_Object* pFields = NULL;
+  if (csType == "Hide") {
+    pFields = pDict->GetElementValue("T");
+  } else {
+    pFields = pDict->GetArrayBy("Fields");
+  }
+  if (!pFields)
+    return 0;
+  if (pFields->IsDictionary())
+    return 1;
+  if (pFields->IsString())
+    return 1;
+  if (CPDF_Array* pArray = pFields->AsArray())
+    return pArray->GetCount();
+  return 0;
+}
+
+std::vector<CPDF_Object*> CPDF_ActionFields::GetAllFields() const {
+  std::vector<CPDF_Object*> fields;
+  if (!m_pAction)
+    return fields;
+
+  CPDF_Dictionary* pDict = m_pAction->GetDict();
+  if (!pDict)
+    return fields;
+
+  CFX_ByteString csType = pDict->GetStringBy("S");
+  CPDF_Object* pFields;
+  if (csType == "Hide")
+    pFields = pDict->GetElementValue("T");
+  else
+    pFields = pDict->GetArrayBy("Fields");
+  if (!pFields)
+    return fields;
+
+  if (pFields->IsDictionary() || pFields->IsString()) {
+    fields.push_back(pFields);
+  } else if (CPDF_Array* pArray = pFields->AsArray()) {
+    FX_DWORD iCount = pArray->GetCount();
+    for (FX_DWORD i = 0; i < iCount; ++i) {
+      CPDF_Object* pObj = pArray->GetElementValue(i);
+      if (pObj) {
+        fields.push_back(pObj);
+      }
+    }
+  }
+  return fields;
+}
+
+CPDF_Object* CPDF_ActionFields::GetField(FX_DWORD iIndex) const {
+  if (!m_pAction) {
+    return NULL;
+  }
+  CPDF_Dictionary* pDict = m_pAction->GetDict();
+  if (!pDict) {
+    return NULL;
+  }
+  CFX_ByteString csType = pDict->GetStringBy("S");
+  CPDF_Object* pFields = NULL;
+  if (csType == "Hide") {
+    pFields = pDict->GetElementValue("T");
+  } else {
+    pFields = pDict->GetArrayBy("Fields");
+  }
+  if (!pFields) {
+    return NULL;
+  }
+  CPDF_Object* pFindObj = NULL;
+  if (pFields->IsDictionary() || pFields->IsString()) {
+    if (iIndex == 0)
+      pFindObj = pFields;
+  } else if (CPDF_Array* pArray = pFields->AsArray()) {
+    pFindObj = pArray->GetElementValue(iIndex);
+  }
+  return pFindObj;
+}
+
+CFX_WideString CPDF_Action::GetJavaScript() const {
+  CFX_WideString csJS;
+  if (!m_pDict) {
+    return csJS;
+  }
+  CPDF_Object* pJS = m_pDict->GetElementValue("JS");
+  return pJS ? pJS->GetUnicodeText() : csJS;
+}
+CPDF_Dictionary* CPDF_Action::GetAnnot() const {
+  if (!m_pDict) {
+    return nullptr;
+  }
+  CFX_ByteString csType = m_pDict->GetStringBy("S");
+  if (csType == "Rendition") {
+    return m_pDict->GetDictBy("AN");
+  }
+  if (csType == "Movie") {
+    return m_pDict->GetDictBy("Annotation");
+  }
+  return nullptr;
+}
+int32_t CPDF_Action::GetOperationType() const {
+  if (!m_pDict) {
+    return 0;
+  }
+  CFX_ByteString csType = m_pDict->GetStringBy("S");
+  if (csType == "Rendition") {
+    return m_pDict->GetIntegerBy("OP");
+  }
+  if (csType == "Movie") {
+    CFX_ByteString csOP = m_pDict->GetStringBy("Operation");
+    if (csOP == "Play") {
+      return 0;
+    }
+    if (csOP == "Stop") {
+      return 1;
+    }
+    if (csOP == "Pause") {
+      return 2;
+    }
+    if (csOP == "Resume") {
+      return 3;
+    }
+  }
+  return 0;
+}
+FX_DWORD CPDF_Action::GetSubActionsCount() const {
+  if (!m_pDict || !m_pDict->KeyExist("Next"))
+    return 0;
+
+  CPDF_Object* pNext = m_pDict->GetElementValue("Next");
+  if (!pNext)
+    return 0;
+  if (pNext->IsDictionary())
+    return 1;
+  if (CPDF_Array* pArray = pNext->AsArray())
+    return pArray->GetCount();
+  return 0;
+}
+CPDF_Action CPDF_Action::GetSubAction(FX_DWORD iIndex) const {
+  if (!m_pDict || !m_pDict->KeyExist("Next")) {
+    return CPDF_Action();
+  }
+  CPDF_Object* pNext = m_pDict->GetElementValue("Next");
+  if (CPDF_Dictionary* pDict = ToDictionary(pNext)) {
+    if (iIndex == 0)
+      return CPDF_Action(pDict);
+  } else if (CPDF_Array* pArray = ToArray(pNext)) {
+    return CPDF_Action(pArray->GetDictAt(iIndex));
+  }
+  return CPDF_Action();
+}
+const FX_CHAR* g_sAATypes[] = {"E",  "X",  "D",  "U",  "Fo", "Bl", "PO", "PC",
+                               "PV", "PI", "O",  "C",  "K",  "F",  "V",  "C",
+                               "WC", "WS", "DS", "WP", "DP", ""};
+FX_BOOL CPDF_AAction::ActionExist(AActionType eType) const {
+  return m_pDict && m_pDict->KeyExist(g_sAATypes[(int)eType]);
+}
+CPDF_Action CPDF_AAction::GetAction(AActionType eType) const {
+  if (!m_pDict) {
+    return CPDF_Action();
+  }
+  return CPDF_Action(m_pDict->GetDictBy(g_sAATypes[(int)eType]));
+}
+
+CPDF_DocJSActions::CPDF_DocJSActions(CPDF_Document* pDoc) : m_pDocument(pDoc) {}
+
+int CPDF_DocJSActions::CountJSActions() const {
+  ASSERT(m_pDocument);
+  CPDF_NameTree name_tree(m_pDocument, "JavaScript");
+  return name_tree.GetCount();
+}
+CPDF_Action CPDF_DocJSActions::GetJSAction(int index,
+                                           CFX_ByteString& csName) const {
+  ASSERT(m_pDocument);
+  CPDF_NameTree name_tree(m_pDocument, "JavaScript");
+  CPDF_Object* pAction = name_tree.LookupValue(index, csName);
+  if (!ToDictionary(pAction)) {
+    return CPDF_Action();
+  }
+  return CPDF_Action(pAction->GetDict());
+}
+CPDF_Action CPDF_DocJSActions::GetJSAction(const CFX_ByteString& csName) const {
+  ASSERT(m_pDocument);
+  CPDF_NameTree name_tree(m_pDocument, "JavaScript");
+  CPDF_Object* pAction = name_tree.LookupValue(csName);
+  if (!ToDictionary(pAction)) {
+    return CPDF_Action();
+  }
+  return CPDF_Action(pAction->GetDict());
+}
+int CPDF_DocJSActions::FindJSAction(const CFX_ByteString& csName) const {
+  ASSERT(m_pDocument);
+  CPDF_NameTree name_tree(m_pDocument, "JavaScript");
+  return name_tree.GetIndex(csName);
+}
diff --git a/core/fpdfdoc/doc_annot.cpp b/core/fpdfdoc/doc_annot.cpp
new file mode 100644
index 0000000000..b17347cce3
--- /dev/null
+++ b/core/fpdfdoc/doc_annot.cpp
@@ -0,0 +1,350 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfapi/cpdf_reference.h"
+#include "core/include/fpdfapi/fpdf_pageobj.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+
+CPDF_AnnotList::CPDF_AnnotList(CPDF_Page* pPage)
+    : m_pDocument(pPage->m_pDocument) {
+  if (!pPage->m_pFormDict)
+    return;
+
+  CPDF_Array* pAnnots = pPage->m_pFormDict->GetArrayBy("Annots");
+  if (!pAnnots)
+    return;
+
+  CPDF_Dictionary* pRoot = m_pDocument->GetRoot();
+  CPDF_Dictionary* pAcroForm = pRoot->GetDictBy("AcroForm");
+  FX_BOOL bRegenerateAP =
+      pAcroForm && pAcroForm->GetBooleanBy("NeedAppearances");
+  for (FX_DWORD i = 0; i < pAnnots->GetCount(); ++i) {
+    CPDF_Dictionary* pDict = ToDictionary(pAnnots->GetElementValue(i));
+    if (!pDict)
+      continue;
+
+    FX_DWORD dwObjNum = pDict->GetObjNum();
+    if (dwObjNum == 0) {
+      dwObjNum = m_pDocument->AddIndirectObject(pDict);
+      CPDF_Reference* pAction = new CPDF_Reference(m_pDocument, dwObjNum);
+      pAnnots->InsertAt(i, pAction);
+      pAnnots->RemoveAt(i + 1);
+      pDict = pAnnots->GetDictAt(i);
+    }
+    m_AnnotList.push_back(new CPDF_Annot(pDict, this));
+    if (bRegenerateAP && pDict->GetConstStringBy("Subtype") == "Widget" &&
+        CPDF_InterForm::UpdatingAPEnabled()) {
+      FPDF_GenerateAP(m_pDocument, pDict);
+    }
+  }
+}
+
+CPDF_AnnotList::~CPDF_AnnotList() {
+  for (CPDF_Annot* annot : m_AnnotList)
+    delete annot;
+}
+
+void CPDF_AnnotList::DisplayPass(CPDF_Page* pPage,
+                                 CFX_RenderDevice* pDevice,
+                                 CPDF_RenderContext* pContext,
+                                 FX_BOOL bPrinting,
+                                 CFX_Matrix* pMatrix,
+                                 FX_BOOL bWidgetPass,
+                                 CPDF_RenderOptions* pOptions,
+                                 FX_RECT* clip_rect) {
+  for (CPDF_Annot* pAnnot : m_AnnotList) {
+    bool bWidget = pAnnot->GetSubType() == "Widget";
+    if ((bWidgetPass && !bWidget) || (!bWidgetPass && bWidget))
+      continue;
+
+    FX_DWORD annot_flags = pAnnot->GetFlags();
+    if (annot_flags & ANNOTFLAG_HIDDEN)
+      continue;
+
+    if (bPrinting && (annot_flags & ANNOTFLAG_PRINT) == 0)
+      continue;
+
+    if (!bPrinting && (annot_flags & ANNOTFLAG_NOVIEW))
+      continue;
+
+    if (pOptions) {
+      IPDF_OCContext* pOCContext = pOptions->m_pOCContext;
+      CPDF_Dictionary* pAnnotDict = pAnnot->GetAnnotDict();
+      if (pOCContext && pAnnotDict &&
+          !pOCContext->CheckOCGVisible(pAnnotDict->GetDictBy("OC"))) {
+        continue;
+      }
+    }
+    CFX_FloatRect annot_rect_f;
+    pAnnot->GetRect(annot_rect_f);
+    CFX_Matrix matrix = *pMatrix;
+    if (clip_rect) {
+      annot_rect_f.Transform(&matrix);
+      FX_RECT annot_rect = annot_rect_f.GetOutterRect();
+      annot_rect.Intersect(*clip_rect);
+      if (annot_rect.IsEmpty()) {
+        continue;
+      }
+    }
+    if (pContext) {
+      pAnnot->DrawInContext(pPage, pContext, &matrix, CPDF_Annot::Normal);
+    } else if (!pAnnot->DrawAppearance(pPage, pDevice, &matrix,
+                                       CPDF_Annot::Normal, pOptions)) {
+      pAnnot->DrawBorder(pDevice, &matrix, pOptions);
+    }
+  }
+}
+
+void CPDF_AnnotList::DisplayAnnots(CPDF_Page* pPage,
+                                   CFX_RenderDevice* pDevice,
+                                   CPDF_RenderContext* pContext,
+                                   FX_BOOL bPrinting,
+                                   CFX_Matrix* pUser2Device,
+                                   FX_DWORD dwAnnotFlags,
+                                   CPDF_RenderOptions* pOptions,
+                                   FX_RECT* pClipRect) {
+  if (dwAnnotFlags & 0x01) {
+    DisplayPass(pPage, pDevice, pContext, bPrinting, pUser2Device, FALSE,
+                pOptions, pClipRect);
+  }
+  if (dwAnnotFlags & 0x02) {
+    DisplayPass(pPage, pDevice, pContext, bPrinting, pUser2Device, TRUE,
+                pOptions, pClipRect);
+  }
+}
+
+CPDF_Annot::CPDF_Annot(CPDF_Dictionary* pDict, CPDF_AnnotList* pList)
+    : m_pAnnotDict(pDict),
+      m_pList(pList),
+      m_sSubtype(m_pAnnotDict->GetConstStringBy("Subtype")) {}
+CPDF_Annot::~CPDF_Annot() {
+  ClearCachedAP();
+}
+void CPDF_Annot::ClearCachedAP() {
+  for (const auto& pair : m_APMap) {
+    delete pair.second;
+  }
+  m_APMap.clear();
+}
+CFX_ByteString CPDF_Annot::GetSubType() const {
+  return m_sSubtype;
+}
+
+void CPDF_Annot::GetRect(CFX_FloatRect& rect) const {
+  if (!m_pAnnotDict) {
+    return;
+  }
+  rect = m_pAnnotDict->GetRectBy("Rect");
+  rect.Normalize();
+}
+
+FX_DWORD CPDF_Annot::GetFlags() const {
+  return m_pAnnotDict->GetIntegerBy("F");
+}
+
+CPDF_Stream* FPDFDOC_GetAnnotAP(CPDF_Dictionary* pAnnotDict,
+                                CPDF_Annot::AppearanceMode mode) {
+  CPDF_Dictionary* pAP = pAnnotDict->GetDictBy("AP");
+  if (!pAP) {
+    return NULL;
+  }
+  const FX_CHAR* ap_entry = "N";
+  if (mode == CPDF_Annot::Down)
+    ap_entry = "D";
+  else if (mode == CPDF_Annot::Rollover)
+    ap_entry = "R";
+  if (!pAP->KeyExist(ap_entry))
+    ap_entry = "N";
+
+  CPDF_Object* psub = pAP->GetElementValue(ap_entry);
+  if (!psub)
+    return nullptr;
+  if (CPDF_Stream* pStream = psub->AsStream())
+    return pStream;
+
+  if (CPDF_Dictionary* pDict = psub->AsDictionary()) {
+    CFX_ByteString as = pAnnotDict->GetStringBy("AS");
+    if (as.IsEmpty()) {
+      CFX_ByteString value = pAnnotDict->GetStringBy("V");
+      if (value.IsEmpty()) {
+        CPDF_Dictionary* pDict = pAnnotDict->GetDictBy("Parent");
+        value = pDict ? pDict->GetStringBy("V") : CFX_ByteString();
+      }
+      if (value.IsEmpty() || !pDict->KeyExist(value))
+        as = "Off";
+      else
+        as = value;
+    }
+    return pDict->GetStreamBy(as);
+  }
+  return nullptr;
+}
+
+CPDF_Form* CPDF_Annot::GetAPForm(const CPDF_Page* pPage, AppearanceMode mode) {
+  CPDF_Stream* pStream = FPDFDOC_GetAnnotAP(m_pAnnotDict, mode);
+  if (!pStream)
+    return nullptr;
+
+  auto it = m_APMap.find(pStream);
+  if (it != m_APMap.end())
+    return it->second;
+
+  CPDF_Form* pNewForm =
+      new CPDF_Form(m_pList->GetDocument(), pPage->m_pResources, pStream);
+  pNewForm->ParseContent(nullptr, nullptr, nullptr, nullptr);
+  m_APMap[pStream] = pNewForm;
+  return pNewForm;
+}
+
+static CPDF_Form* FPDFDOC_Annot_GetMatrix(const CPDF_Page* pPage,
+                                          CPDF_Annot* pAnnot,
+                                          CPDF_Annot::AppearanceMode mode,
+                                          const CFX_Matrix* pUser2Device,
+                                          CFX_Matrix& matrix) {
+  CPDF_Form* pForm = pAnnot->GetAPForm(pPage, mode);
+  if (!pForm) {
+    return NULL;
+  }
+  CFX_FloatRect form_bbox = pForm->m_pFormDict->GetRectBy("BBox");
+  CFX_Matrix form_matrix = pForm->m_pFormDict->GetMatrixBy("Matrix");
+  form_matrix.TransformRect(form_bbox);
+  CFX_FloatRect arect;
+  pAnnot->GetRect(arect);
+  matrix.MatchRect(arect, form_bbox);
+  matrix.Concat(*pUser2Device);
+  return pForm;
+}
+FX_BOOL CPDF_Annot::DrawAppearance(CPDF_Page* pPage,
+                                   CFX_RenderDevice* pDevice,
+                                   const CFX_Matrix* pUser2Device,
+                                   AppearanceMode mode,
+                                   const CPDF_RenderOptions* pOptions) {
+  CFX_Matrix matrix;
+  CPDF_Form* pForm =
+      FPDFDOC_Annot_GetMatrix(pPage, this, mode, pUser2Device, matrix);
+  if (!pForm) {
+    return FALSE;
+  }
+  CPDF_RenderContext context(pPage);
+  context.AppendLayer(pForm, &matrix);
+  context.Render(pDevice, pOptions, nullptr);
+  return TRUE;
+}
+FX_BOOL CPDF_Annot::DrawInContext(const CPDF_Page* pPage,
+                                  CPDF_RenderContext* pContext,
+                                  const CFX_Matrix* pUser2Device,
+                                  AppearanceMode mode) {
+  CFX_Matrix matrix;
+  CPDF_Form* pForm =
+      FPDFDOC_Annot_GetMatrix(pPage, this, mode, pUser2Device, matrix);
+  if (!pForm) {
+    return FALSE;
+  }
+  pContext->AppendLayer(pForm, &matrix);
+  return TRUE;
+}
+void CPDF_Annot::DrawBorder(CFX_RenderDevice* pDevice,
+                            const CFX_Matrix* pUser2Device,
+                            const CPDF_RenderOptions* pOptions) {
+  if (GetSubType() == "Popup") {
+    return;
+  }
+  FX_DWORD annot_flags = GetFlags();
+  if (annot_flags & ANNOTFLAG_HIDDEN) {
+    return;
+  }
+  bool bPrinting = pDevice->GetDeviceClass() == FXDC_PRINTER ||
+                   (pOptions && (pOptions->m_Flags & RENDER_PRINTPREVIEW));
+  if (bPrinting && (annot_flags & ANNOTFLAG_PRINT) == 0) {
+    return;
+  }
+  if (!bPrinting && (annot_flags & ANNOTFLAG_NOVIEW)) {
+    return;
+  }
+  CPDF_Dictionary* pBS = m_pAnnotDict->GetDictBy("BS");
+  char style_char;
+  FX_FLOAT width;
+  CPDF_Array* pDashArray = NULL;
+  if (!pBS) {
+    CPDF_Array* pBorderArray = m_pAnnotDict->GetArrayBy("Border");
+    style_char = 'S';
+    if (pBorderArray) {
+      width = pBorderArray->GetNumberAt(2);
+      if (pBorderArray->GetCount() == 4) {
+        pDashArray = pBorderArray->GetArrayAt(3);
+        if (!pDashArray) {
+          return;
+        }
+        int nLen = pDashArray->GetCount();
+        int i = 0;
+        for (; i < nLen; ++i) {
+          CPDF_Object* pObj = pDashArray->GetElementValue(i);
+          if (pObj && pObj->GetInteger()) {
+            break;
+          }
+        }
+        if (i == nLen) {
+          return;
+        }
+        style_char = 'D';
+      }
+    } else {
+      width = 1;
+    }
+  } else {
+    CFX_ByteString style = pBS->GetStringBy("S");
+    pDashArray = pBS->GetArrayBy("D");
+    style_char = style[1];
+    width = pBS->GetNumberBy("W");
+  }
+  if (width <= 0) {
+    return;
+  }
+  CPDF_Array* pColor = m_pAnnotDict->GetArrayBy("C");
+  FX_DWORD argb = 0xff000000;
+  if (pColor) {
+    int R = (int32_t)(pColor->GetNumberAt(0) * 255);
+    int G = (int32_t)(pColor->GetNumberAt(1) * 255);
+    int B = (int32_t)(pColor->GetNumberAt(2) * 255);
+    argb = ArgbEncode(0xff, R, G, B);
+  }
+  CFX_GraphStateData graph_state;
+  graph_state.m_LineWidth = width;
+  if (style_char == 'D') {
+    if (pDashArray) {
+      FX_DWORD dash_count = pDashArray->GetCount();
+      if (dash_count % 2) {
+        dash_count++;
+      }
+      graph_state.m_DashArray = FX_Alloc(FX_FLOAT, dash_count);
+      graph_state.m_DashCount = dash_count;
+      FX_DWORD i;
+      for (i = 0; i < pDashArray->GetCount(); ++i) {
+        graph_state.m_DashArray[i] = pDashArray->GetNumberAt(i);
+      }
+      if (i < dash_count) {
+        graph_state.m_DashArray[i] = graph_state.m_DashArray[i - 1];
+      }
+    } else {
+      graph_state.m_DashArray = FX_Alloc(FX_FLOAT, 2);
+      graph_state.m_DashCount = 2;
+      graph_state.m_DashArray[0] = graph_state.m_DashArray[1] = 3 * 1.0f;
+    }
+  }
+  CFX_FloatRect rect;
+  GetRect(rect);
+  CFX_PathData path;
+  width /= 2;
+  path.AppendRect(rect.left + width, rect.bottom + width, rect.right - width,
+                  rect.top - width);
+  int fill_type = 0;
+  if (pOptions && (pOptions->m_Flags & RENDER_NOPATHSMOOTH)) {
+    fill_type |= FXFILL_NOPATHSMOOTH;
+  }
+  pDevice->DrawPath(&path, pUser2Device, &graph_state, argb, argb, fill_type);
+}
diff --git a/core/fpdfdoc/doc_ap.cpp b/core/fpdfdoc/doc_ap.cpp
new file mode 100644
index 0000000000..d2400123d2
--- /dev/null
+++ b/core/fpdfdoc/doc_ap.cpp
@@ -0,0 +1,936 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fpdfdoc/doc_utils.h"
+#include "core/fpdfdoc/pdf_vt.h"
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfapi/cpdf_simple_parser.h"
+#include "core/include/fpdfdoc/fpdf_ap.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+#include "core/include/fpdfdoc/fpdf_vt.h"
+
+#define PBS_SOLID 0
+#define PBS_DASH 1
+#define PBS_BEVELED 2
+#define PBS_INSET 3
+#define PBS_UNDERLINED 4
+
+FX_BOOL FPDF_GenerateAP(CPDF_Document* pDoc, CPDF_Dictionary* pAnnotDict) {
+  if (!pAnnotDict || pAnnotDict->GetConstStringBy("Subtype") != "Widget") {
+    return FALSE;
+  }
+  CFX_ByteString field_type = FPDF_GetFieldAttr(pAnnotDict, "FT")->GetString();
+  FX_DWORD flags = FPDF_GetFieldAttr(pAnnotDict, "Ff")
+                       ? FPDF_GetFieldAttr(pAnnotDict, "Ff")->GetInteger()
+                       : 0;
+  if (field_type == "Tx") {
+    return CPVT_GenerateAP::GenerateTextFieldAP(pDoc, pAnnotDict);
+  }
+  if (field_type == "Ch") {
+    return (flags & (1 << 17))
+               ? CPVT_GenerateAP::GenerateComboBoxAP(pDoc, pAnnotDict)
+               : CPVT_GenerateAP::GenerateListBoxAP(pDoc, pAnnotDict);
+  }
+  if (field_type == "Btn") {
+    if (!(flags & (1 << 16))) {
+      if (!pAnnotDict->KeyExist("AS")) {
+        if (CPDF_Dictionary* pParentDict = pAnnotDict->GetDictBy("Parent")) {
+          if (pParentDict->KeyExist("AS")) {
+            pAnnotDict->SetAtString("AS", pParentDict->GetStringBy("AS"));
+          }
+        }
+      }
+    }
+  }
+  return FALSE;
+}
+
+class CPVT_FontMap : public IPVT_FontMap {
+ public:
+  CPVT_FontMap(CPDF_Document* pDoc,
+               CPDF_Dictionary* pResDict,
+               CPDF_Font* pDefFont,
+               const CFX_ByteString& sDefFontAlias);
+  ~CPVT_FontMap() override;
+
+  // IPVT_FontMap
+  CPDF_Font* GetPDFFont(int32_t nFontIndex) override;
+  CFX_ByteString GetPDFFontAlias(int32_t nFontIndex) override;
+
+  static void GetAnnotSysPDFFont(CPDF_Document* pDoc,
+                                 CPDF_Dictionary* pResDict,
+                                 CPDF_Font*& pSysFont,
+                                 CFX_ByteString& sSysFontAlias);
+
+ private:
+  CPDF_Document* m_pDocument;
+  CPDF_Dictionary* m_pResDict;
+  CPDF_Font* m_pDefFont;
+  CFX_ByteString m_sDefFontAlias;
+  CPDF_Font* m_pSysFont;
+  CFX_ByteString m_sSysFontAlias;
+};
+
+CPVT_FontMap::CPVT_FontMap(CPDF_Document* pDoc,
+                           CPDF_Dictionary* pResDict,
+                           CPDF_Font* pDefFont,
+                           const CFX_ByteString& sDefFontAlias)
+    : m_pDocument(pDoc),
+      m_pResDict(pResDict),
+      m_pDefFont(pDefFont),
+      m_sDefFontAlias(sDefFontAlias),
+      m_pSysFont(NULL),
+      m_sSysFontAlias() {}
+CPVT_FontMap::~CPVT_FontMap() {}
+void CPVT_FontMap::GetAnnotSysPDFFont(CPDF_Document* pDoc,
+                                      CPDF_Dictionary* pResDict,
+                                      CPDF_Font*& pSysFont,
+                                      CFX_ByteString& sSysFontAlias) {
+  if (pDoc && pResDict) {
+    CFX_ByteString sFontAlias;
+    CPDF_Dictionary* pFormDict = pDoc->GetRoot()->GetDictBy("AcroForm");
+    if (CPDF_Font* pPDFFont =
+            AddNativeInterFormFont(pFormDict, pDoc, sSysFontAlias)) {
+      if (CPDF_Dictionary* pFontList = pResDict->GetDictBy("Font")) {
+        if (!pFontList->KeyExist(sSysFontAlias)) {
+          pFontList->SetAtReference(sSysFontAlias, pDoc,
+                                    pPDFFont->GetFontDict());
+        }
+      }
+      pSysFont = pPDFFont;
+    }
+  }
+}
+CPDF_Font* CPVT_FontMap::GetPDFFont(int32_t nFontIndex) {
+  switch (nFontIndex) {
+    case 0:
+      return m_pDefFont;
+    case 1:
+      if (!m_pSysFont) {
+        GetAnnotSysPDFFont(m_pDocument, m_pResDict, m_pSysFont,
+                           m_sSysFontAlias);
+      }
+      return m_pSysFont;
+  }
+  return NULL;
+}
+CFX_ByteString CPVT_FontMap::GetPDFFontAlias(int32_t nFontIndex) {
+  switch (nFontIndex) {
+    case 0:
+      return m_sDefFontAlias;
+    case 1:
+      if (!m_pSysFont) {
+        GetAnnotSysPDFFont(m_pDocument, m_pResDict, m_pSysFont,
+                           m_sSysFontAlias);
+      }
+      return m_sSysFontAlias;
+  }
+  return "";
+}
+CPVT_Provider::CPVT_Provider(IPVT_FontMap* pFontMap) : m_pFontMap(pFontMap) {
+  ASSERT(m_pFontMap);
+}
+CPVT_Provider::~CPVT_Provider() {}
+int32_t CPVT_Provider::GetCharWidth(int32_t nFontIndex,
+                                    FX_WORD word,
+                                    int32_t nWordStyle) {
+  if (CPDF_Font* pPDFFont = m_pFontMap->GetPDFFont(nFontIndex)) {
+    FX_DWORD charcode = pPDFFont->CharCodeFromUnicode(word);
+    if (charcode != CPDF_Font::kInvalidCharCode) {
+      return pPDFFont->GetCharWidthF(charcode);
+    }
+  }
+  return 0;
+}
+int32_t CPVT_Provider::GetTypeAscent(int32_t nFontIndex) {
+  if (CPDF_Font* pPDFFont = m_pFontMap->GetPDFFont(nFontIndex)) {
+    return pPDFFont->GetTypeAscent();
+  }
+  return 0;
+}
+int32_t CPVT_Provider::GetTypeDescent(int32_t nFontIndex) {
+  if (CPDF_Font* pPDFFont = m_pFontMap->GetPDFFont(nFontIndex)) {
+    return pPDFFont->GetTypeDescent();
+  }
+  return 0;
+}
+int32_t CPVT_Provider::GetWordFontIndex(FX_WORD word,
+                                        int32_t charset,
+                                        int32_t nFontIndex) {
+  if (CPDF_Font* pDefFont = m_pFontMap->GetPDFFont(0)) {
+    if (pDefFont->CharCodeFromUnicode(word) != CPDF_Font::kInvalidCharCode) {
+      return 0;
+    }
+  }
+  if (CPDF_Font* pSysFont = m_pFontMap->GetPDFFont(1)) {
+    if (pSysFont->CharCodeFromUnicode(word) != CPDF_Font::kInvalidCharCode) {
+      return 1;
+    }
+  }
+  return -1;
+}
+FX_BOOL CPVT_Provider::IsLatinWord(FX_WORD word) {
+  if ((word >= 0x61 && word <= 0x7A) || (word >= 0x41 && word <= 0x5A) ||
+      word == 0x2D || word == 0x27) {
+    return TRUE;
+  }
+  return FALSE;
+}
+int32_t CPVT_Provider::GetDefaultFontIndex() {
+  return 0;
+}
+
+static CFX_ByteString GetPDFWordString(IPVT_FontMap* pFontMap,
+                                       int32_t nFontIndex,
+                                       FX_WORD Word,
+                                       FX_WORD SubWord) {
+  CFX_ByteString sWord;
+  if (SubWord > 0) {
+    sWord.Format("%c", SubWord);
+    return sWord;
+  }
+
+  if (!pFontMap)
+    return sWord;
+
+  if (CPDF_Font* pPDFFont = pFontMap->GetPDFFont(nFontIndex)) {
+    if (pPDFFont->GetBaseFont().Compare("Symbol") == 0 ||
+        pPDFFont->GetBaseFont().Compare("ZapfDingbats") == 0) {
+      sWord.Format("%c", Word);
+    } else {
+      FX_DWORD dwCharCode = pPDFFont->CharCodeFromUnicode(Word);
+      if (dwCharCode != CPDF_Font::kInvalidCharCode) {
+        pPDFFont->AppendChar(sWord, dwCharCode);
+      }
+    }
+  }
+  return sWord;
+}
+
+static CFX_ByteString GetWordRenderString(const CFX_ByteString& strWords) {
+  if (strWords.GetLength() > 0) {
+    return PDF_EncodeString(strWords) + " Tj\n";
+  }
+  return "";
+}
+static CFX_ByteString GetFontSetString(IPVT_FontMap* pFontMap,
+                                       int32_t nFontIndex,
+                                       FX_FLOAT fFontSize) {
+  CFX_ByteTextBuf sRet;
+  if (pFontMap) {
+    CFX_ByteString sFontAlias = pFontMap->GetPDFFontAlias(nFontIndex);
+    if (sFontAlias.GetLength() > 0 && fFontSize > 0) {
+      sRet << "/" << sFontAlias << " " << fFontSize << " Tf\n";
+    }
+  }
+  return sRet.GetByteString();
+}
+static CPVT_Color ParseColor(const CFX_ByteString& str) {
+  CPDF_SimpleParser syntax(str);
+  if (syntax.FindTagParamFromStart("g", 1)) {
+    return CPVT_Color(CPVT_Color::kGray, FX_atof(syntax.GetWord()));
+  }
+  if (syntax.FindTagParamFromStart("rg", 3)) {
+    FX_FLOAT f1 = FX_atof(syntax.GetWord());
+    FX_FLOAT f2 = FX_atof(syntax.GetWord());
+    FX_FLOAT f3 = FX_atof(syntax.GetWord());
+    return CPVT_Color(CPVT_Color::kRGB, f1, f2, f3);
+  }
+  if (syntax.FindTagParamFromStart("k", 4)) {
+    FX_FLOAT f1 = FX_atof(syntax.GetWord());
+    FX_FLOAT f2 = FX_atof(syntax.GetWord());
+    FX_FLOAT f3 = FX_atof(syntax.GetWord());
+    FX_FLOAT f4 = FX_atof(syntax.GetWord());
+    return CPVT_Color(CPVT_Color::kCMYK, f1, f2, f3, f4);
+  }
+  return CPVT_Color(CPVT_Color::kTransparent);
+}
+static CPVT_Color ParseColor(const CPDF_Array& array) {
+  CPVT_Color rt;
+  switch (array.GetCount()) {
+    case 1:
+      rt = CPVT_Color(CPVT_Color::kGray, array.GetFloatAt(0));
+      break;
+    case 3:
+      rt = CPVT_Color(CPVT_Color::kRGB, array.GetFloatAt(0),
+                      array.GetFloatAt(1), array.GetFloatAt(2));
+      break;
+    case 4:
+      rt = CPVT_Color(CPVT_Color::kCMYK, array.GetFloatAt(0),
+                      array.GetFloatAt(1), array.GetFloatAt(2),
+                      array.GetFloatAt(3));
+      break;
+  }
+  return rt;
+}
+static FX_BOOL GenerateWidgetAP(CPDF_Document* pDoc,
+                                CPDF_Dictionary* pAnnotDict,
+                                const int32_t& nWidgetType) {
+  CPDF_Dictionary* pFormDict = NULL;
+  if (CPDF_Dictionary* pRootDict = pDoc->GetRoot()) {
+    pFormDict = pRootDict->GetDictBy("AcroForm");
+  }
+  if (!pFormDict) {
+    return FALSE;
+  }
+  CFX_ByteString DA;
+  if (CPDF_Object* pDAObj = FPDF_GetFieldAttr(pAnnotDict, "DA")) {
+    DA = pDAObj->GetString();
+  }
+  if (DA.IsEmpty()) {
+    DA = pFormDict->GetStringBy("DA");
+  }
+  if (DA.IsEmpty()) {
+    return FALSE;
+  }
+  CPDF_SimpleParser syntax(DA);
+  syntax.FindTagParamFromStart("Tf", 2);
+  CFX_ByteString sFontName = syntax.GetWord();
+  sFontName = PDF_NameDecode(sFontName);
+  if (sFontName.IsEmpty()) {
+    return FALSE;
+  }
+  FX_FLOAT fFontSize = FX_atof(syntax.GetWord());
+  CPVT_Color crText = ParseColor(DA);
+  FX_BOOL bUseFormRes = FALSE;
+  CPDF_Dictionary* pFontDict = NULL;
+  CPDF_Dictionary* pDRDict = pAnnotDict->GetDictBy("DR");
+  if (!pDRDict) {
+    pDRDict = pFormDict->GetDictBy("DR");
+    bUseFormRes = TRUE;
+  }
+  CPDF_Dictionary* pDRFontDict = NULL;
+  if (pDRDict && (pDRFontDict = pDRDict->GetDictBy("Font"))) {
+    pFontDict = pDRFontDict->GetDictBy(sFontName.Mid(1));
+    if (!pFontDict && !bUseFormRes) {
+      pDRDict = pFormDict->GetDictBy("DR");
+      pDRFontDict = pDRDict->GetDictBy("Font");
+      if (pDRFontDict) {
+        pFontDict = pDRFontDict->GetDictBy(sFontName.Mid(1));
+      }
+    }
+  }
+  if (!pDRFontDict) {
+    return FALSE;
+  }
+  if (!pFontDict) {
+    pFontDict = new CPDF_Dictionary;
+    pFontDict->SetAtName("Type", "Font");
+    pFontDict->SetAtName("Subtype", "Type1");
+    pFontDict->SetAtName("BaseFont", "Helvetica");
+    pFontDict->SetAtName("Encoding", "WinAnsiEncoding");
+    pDoc->AddIndirectObject(pFontDict);
+    pDRFontDict->SetAtReference(sFontName.Mid(1), pDoc, pFontDict);
+  }
+  CPDF_Font* pDefFont = pDoc->LoadFont(pFontDict);
+  if (!pDefFont) {
+    return FALSE;
+  }
+  CFX_FloatRect rcAnnot = pAnnotDict->GetRectBy("Rect");
+  int32_t nRotate = 0;
+  if (CPDF_Dictionary* pMKDict = pAnnotDict->GetDictBy("MK")) {
+    nRotate = pMKDict->GetIntegerBy("R");
+  }
+  CFX_FloatRect rcBBox;
+  CFX_Matrix matrix;
+  switch (nRotate % 360) {
+    case 0:
+      rcBBox = CFX_FloatRect(0, 0, rcAnnot.right - rcAnnot.left,
+                             rcAnnot.top - rcAnnot.bottom);
+      break;
+    case 90:
+      matrix = CFX_Matrix(0, 1, -1, 0, rcAnnot.right - rcAnnot.left, 0);
+      rcBBox = CFX_FloatRect(0, 0, rcAnnot.top - rcAnnot.bottom,
+                             rcAnnot.right - rcAnnot.left);
+      break;
+    case 180:
+      matrix = CFX_Matrix(-1, 0, 0, -1, rcAnnot.right - rcAnnot.left,
+                          rcAnnot.top - rcAnnot.bottom);
+      rcBBox = CFX_FloatRect(0, 0, rcAnnot.right - rcAnnot.left,
+                             rcAnnot.top - rcAnnot.bottom);
+      break;
+    case 270:
+      matrix = CFX_Matrix(0, -1, 1, 0, 0, rcAnnot.top - rcAnnot.bottom);
+      rcBBox = CFX_FloatRect(0, 0, rcAnnot.top - rcAnnot.bottom,
+                             rcAnnot.right - rcAnnot.left);
+      break;
+  }
+  int32_t nBorderStyle = PBS_SOLID;
+  FX_FLOAT fBorderWidth = 1;
+  CPVT_Dash dsBorder(3, 0, 0);
+  CPVT_Color crLeftTop, crRightBottom;
+  if (CPDF_Dictionary* pBSDict = pAnnotDict->GetDictBy("BS")) {
+    if (pBSDict->KeyExist("W")) {
+      fBorderWidth = pBSDict->GetNumberBy("W");
+    }
+    if (CPDF_Array* pArray = pBSDict->GetArrayBy("D")) {
+      dsBorder = CPVT_Dash(pArray->GetIntegerAt(0), pArray->GetIntegerAt(1),
+                           pArray->GetIntegerAt(2));
+    }
+    switch (pBSDict->GetStringBy("S").GetAt(0)) {
+      case 'S':
+        nBorderStyle = PBS_SOLID;
+        break;
+      case 'D':
+        nBorderStyle = PBS_DASH;
+        break;
+      case 'B':
+        nBorderStyle = PBS_BEVELED;
+        fBorderWidth *= 2;
+        crLeftTop = CPVT_Color(CPVT_Color::kGray, 1);
+        crRightBottom = CPVT_Color(CPVT_Color::kGray, 0.5);
+        break;
+      case 'I':
+        nBorderStyle = PBS_INSET;
+        fBorderWidth *= 2;
+        crLeftTop = CPVT_Color(CPVT_Color::kGray, 0.5);
+        crRightBottom = CPVT_Color(CPVT_Color::kGray, 0.75);
+        break;
+      case 'U':
+        nBorderStyle = PBS_UNDERLINED;
+        break;
+    }
+  }
+  CPVT_Color crBorder, crBG;
+  if (CPDF_Dictionary* pMKDict = pAnnotDict->GetDictBy("MK")) {
+    if (CPDF_Array* pArray = pMKDict->GetArrayBy("BC")) {
+      crBorder = ParseColor(*pArray);
+    }
+    if (CPDF_Array* pArray = pMKDict->GetArrayBy("BG")) {
+      crBG = ParseColor(*pArray);
+    }
+  }
+  CFX_ByteTextBuf sAppStream;
+  CFX_ByteString sBG = CPVT_GenerateAP::GenerateColorAP(crBG, TRUE);
+  if (sBG.GetLength() > 0) {
+    sAppStream << "q\n" << sBG << rcBBox.left << " " << rcBBox.bottom << " "
+               << rcBBox.Width() << " " << rcBBox.Height() << " re f\n"
+               << "Q\n";
+  }
+  CFX_ByteString sBorderStream = CPVT_GenerateAP::GenerateBorderAP(
+      rcBBox, fBorderWidth, crBorder, crLeftTop, crRightBottom, nBorderStyle,
+      dsBorder);
+  if (sBorderStream.GetLength() > 0) {
+    sAppStream << "q\n" << sBorderStream << "Q\n";
+  }
+  CFX_FloatRect rcBody =
+      CFX_FloatRect(rcBBox.left + fBorderWidth, rcBBox.bottom + fBorderWidth,
+                    rcBBox.right - fBorderWidth, rcBBox.top - fBorderWidth);
+  rcBody.Normalize();
+  CPDF_Dictionary* pAPDict = pAnnotDict->GetDictBy("AP");
+  if (!pAPDict) {
+    pAPDict = new CPDF_Dictionary;
+    pAnnotDict->SetAt("AP", pAPDict);
+  }
+  CPDF_Stream* pNormalStream = pAPDict->GetStreamBy("N");
+  if (!pNormalStream) {
+    pNormalStream = new CPDF_Stream(nullptr, 0, nullptr);
+    int32_t objnum = pDoc->AddIndirectObject(pNormalStream);
+    pAnnotDict->GetDictBy("AP")->SetAtReference("N", pDoc, objnum);
+  }
+  CPDF_Dictionary* pStreamDict = pNormalStream->GetDict();
+  if (pStreamDict) {
+    pStreamDict->SetAtMatrix("Matrix", matrix);
+    pStreamDict->SetAtRect("BBox", rcBBox);
+    CPDF_Dictionary* pStreamResList = pStreamDict->GetDictBy("Resources");
+    if (pStreamResList) {
+      CPDF_Dictionary* pStreamResFontList = pStreamResList->GetDictBy("Font");
+      if (!pStreamResFontList) {
+        pStreamResFontList = new CPDF_Dictionary;
+        pStreamResList->SetAt("Font", pStreamResFontList);
+      }
+      if (!pStreamResFontList->KeyExist(sFontName)) {
+        pStreamResFontList->SetAtReference(sFontName, pDoc, pFontDict);
+      }
+    } else {
+      pStreamDict->SetAt("Resources", pFormDict->GetDictBy("DR")->Clone());
+      pStreamResList = pStreamDict->GetDictBy("Resources");
+    }
+  }
+  switch (nWidgetType) {
+    case 0: {
+      CFX_WideString swValue =
+          FPDF_GetFieldAttr(pAnnotDict, "V")
+              ? FPDF_GetFieldAttr(pAnnotDict, "V")->GetUnicodeText()
+              : CFX_WideString();
+      int32_t nAlign = FPDF_GetFieldAttr(pAnnotDict, "Q")
+                           ? FPDF_GetFieldAttr(pAnnotDict, "Q")->GetInteger()
+                           : 0;
+      FX_DWORD dwFlags = FPDF_GetFieldAttr(pAnnotDict, "Ff")
+                             ? FPDF_GetFieldAttr(pAnnotDict, "Ff")->GetInteger()
+                             : 0;
+      FX_DWORD dwMaxLen =
+          FPDF_GetFieldAttr(pAnnotDict, "MaxLen")
+              ? FPDF_GetFieldAttr(pAnnotDict, "MaxLen")->GetInteger()
+              : 0;
+      CPVT_FontMap map(pDoc,
+                       pStreamDict ? pStreamDict->GetDictBy("Resources") : NULL,
+                       pDefFont, sFontName.Right(sFontName.GetLength() - 1));
+      CPVT_Provider prd(&map);
+      CPDF_VariableText vt;
+      vt.SetProvider(&prd);
+      vt.SetPlateRect(rcBody);
+      vt.SetAlignment(nAlign);
+      if (IsFloatZero(fFontSize)) {
+        vt.SetAutoFontSize(TRUE);
+      } else {
+        vt.SetFontSize(fFontSize);
+      }
+      FX_BOOL bMultiLine = (dwFlags >> 12) & 1;
+      if (bMultiLine) {
+        vt.SetMultiLine(TRUE);
+        vt.SetAutoReturn(TRUE);
+      }
+      FX_WORD subWord = 0;
+      if ((dwFlags >> 13) & 1) {
+        subWord = '*';
+        vt.SetPasswordChar(subWord);
+      }
+      FX_BOOL bCharArray = (dwFlags >> 24) & 1;
+      if (bCharArray) {
+        vt.SetCharArray(dwMaxLen);
+      } else {
+        vt.SetLimitChar(dwMaxLen);
+      }
+      vt.Initialize();
+      vt.SetText(swValue.c_str());
+      vt.RearrangeAll();
+      CFX_FloatRect rcContent = vt.GetContentRect();
+      CFX_FloatPoint ptOffset(0.0f, 0.0f);
+      if (!bMultiLine) {
+        ptOffset =
+            CFX_FloatPoint(0.0f, (rcContent.Height() - rcBody.Height()) / 2.0f);
+      }
+      CFX_ByteString sBody = CPVT_GenerateAP::GenerateEditAP(
+          &map, vt.GetIterator(), ptOffset, !bCharArray, subWord);
+      if (sBody.GetLength() > 0) {
+        sAppStream << "/Tx BMC\n"
+                   << "q\n";
+        if (rcContent.Width() > rcBody.Width() ||
+            rcContent.Height() > rcBody.Height()) {
+          sAppStream << rcBody.left << " " << rcBody.bottom << " "
+                     << rcBody.Width() << " " << rcBody.Height()
+                     << " re\nW\nn\n";
+        }
+        sAppStream << "BT\n" << CPVT_GenerateAP::GenerateColorAP(crText, TRUE)
+                   << sBody << "ET\n"
+                   << "Q\nEMC\n";
+      }
+    } break;
+    case 1: {
+      CFX_WideString swValue =
+          FPDF_GetFieldAttr(pAnnotDict, "V")
+              ? FPDF_GetFieldAttr(pAnnotDict, "V")->GetUnicodeText()
+              : CFX_WideString();
+      CPVT_FontMap map(pDoc,
+                       pStreamDict ? pStreamDict->GetDictBy("Resources") : NULL,
+                       pDefFont, sFontName.Right(sFontName.GetLength() - 1));
+      CPVT_Provider prd(&map);
+      CPDF_VariableText vt;
+      vt.SetProvider(&prd);
+      CFX_FloatRect rcButton = rcBody;
+      rcButton.left = rcButton.right - 13;
+      rcButton.Normalize();
+      CFX_FloatRect rcEdit = rcBody;
+      rcEdit.right = rcButton.left;
+      rcEdit.Normalize();
+      vt.SetPlateRect(rcEdit);
+      if (IsFloatZero(fFontSize)) {
+        vt.SetAutoFontSize(TRUE);
+      } else {
+        vt.SetFontSize(fFontSize);
+      }
+      vt.Initialize();
+      vt.SetText(swValue.c_str());
+      vt.RearrangeAll();
+      CFX_FloatRect rcContent = vt.GetContentRect();
+      CFX_FloatPoint ptOffset =
+          CFX_FloatPoint(0.0f, (rcContent.Height() - rcEdit.Height()) / 2.0f);
+      CFX_ByteString sEdit = CPVT_GenerateAP::GenerateEditAP(
+          &map, vt.GetIterator(), ptOffset, TRUE, 0);
+      if (sEdit.GetLength() > 0) {
+        sAppStream << "/Tx BMC\n"
+                   << "q\n";
+        sAppStream << rcEdit.left << " " << rcEdit.bottom << " "
+                   << rcEdit.Width() << " " << rcEdit.Height() << " re\nW\nn\n";
+        sAppStream << "BT\n" << CPVT_GenerateAP::GenerateColorAP(crText, TRUE)
+                   << sEdit << "ET\n"
+                   << "Q\nEMC\n";
+      }
+      CFX_ByteString sButton = CPVT_GenerateAP::GenerateColorAP(
+          CPVT_Color(CPVT_Color::kRGB, 220.0f / 255.0f, 220.0f / 255.0f,
+                     220.0f / 255.0f),
+          TRUE);
+      if (sButton.GetLength() > 0 && !rcButton.IsEmpty()) {
+        sAppStream << "q\n" << sButton;
+        sAppStream << rcButton.left << " " << rcButton.bottom << " "
+                   << rcButton.Width() << " " << rcButton.Height() << " re f\n";
+        sAppStream << "Q\n";
+        CFX_ByteString sButtonBorder = CPVT_GenerateAP::GenerateBorderAP(
+            rcButton, 2, CPVT_Color(CPVT_Color::kGray, 0),
+            CPVT_Color(CPVT_Color::kGray, 1),
+            CPVT_Color(CPVT_Color::kGray, 0.5), PBS_BEVELED,
+            CPVT_Dash(3, 0, 0));
+        if (sButtonBorder.GetLength() > 0) {
+          sAppStream << "q\n" << sButtonBorder << "Q\n";
+        }
+        CFX_FloatPoint ptCenter =
+            CFX_FloatPoint((rcButton.left + rcButton.right) / 2,
+                           (rcButton.top + rcButton.bottom) / 2);
+        if (IsFloatBigger(rcButton.Width(), 6) &&
+            IsFloatBigger(rcButton.Height(), 6)) {
+          sAppStream << "q\n"
+                     << " 0 g\n";
+          sAppStream << ptCenter.x - 3 << " " << ptCenter.y + 1.5f << " m\n";
+          sAppStream << ptCenter.x + 3 << " " << ptCenter.y + 1.5f << " l\n";
+          sAppStream << ptCenter.x << " " << ptCenter.y - 1.5f << " l\n";
+          sAppStream << ptCenter.x - 3 << " " << ptCenter.y + 1.5f << " l f\n";
+          sAppStream << sButton << "Q\n";
+        }
+      }
+    } break;
+    case 2: {
+      CPVT_FontMap map(pDoc,
+                       pStreamDict ? pStreamDict->GetDictBy("Resources") : NULL,
+                       pDefFont, sFontName.Right(sFontName.GetLength() - 1));
+      CPVT_Provider prd(&map);
+      CPDF_Array* pOpts = FPDF_GetFieldAttr(pAnnotDict, "Opt")
+                              ? FPDF_GetFieldAttr(pAnnotDict, "Opt")->GetArray()
+                              : NULL;
+      CPDF_Array* pSels = FPDF_GetFieldAttr(pAnnotDict, "I")
+                              ? FPDF_GetFieldAttr(pAnnotDict, "I")->GetArray()
+                              : NULL;
+      int32_t nTop = FPDF_GetFieldAttr(pAnnotDict, "TI")
+                         ? FPDF_GetFieldAttr(pAnnotDict, "TI")->GetInteger()
+                         : 0;
+      CFX_ByteTextBuf sBody;
+      if (pOpts) {
+        FX_FLOAT fy = rcBody.top;
+        for (int32_t i = nTop, sz = pOpts->GetCount(); i < sz; i++) {
+          if (IsFloatSmaller(fy, rcBody.bottom)) {
+            break;
+          }
+          if (CPDF_Object* pOpt = pOpts->GetElementValue(i)) {
+            CFX_WideString swItem;
+            if (pOpt->IsString())
+              swItem = pOpt->GetUnicodeText();
+            else if (CPDF_Array* pArray = pOpt->AsArray())
+              swItem = pArray->GetElementValue(1)->GetUnicodeText();
+
+            FX_BOOL bSelected = FALSE;
+            if (pSels) {
+              for (FX_DWORD s = 0, ssz = pSels->GetCount(); s < ssz; s++) {
+                if (i == pSels->GetIntegerAt(s)) {
+                  bSelected = TRUE;
+                  break;
+                }
+              }
+            }
+            CPDF_VariableText vt;
+            vt.SetProvider(&prd);
+            vt.SetPlateRect(
+                CFX_FloatRect(rcBody.left, 0.0f, rcBody.right, 0.0f));
+            if (IsFloatZero(fFontSize)) {
+              vt.SetFontSize(12.0f);
+            } else {
+              vt.SetFontSize(fFontSize);
+            }
+            vt.Initialize();
+            vt.SetText(swItem.c_str());
+            vt.RearrangeAll();
+            FX_FLOAT fItemHeight = vt.GetContentRect().Height();
+            if (bSelected) {
+              CFX_FloatRect rcItem = CFX_FloatRect(
+                  rcBody.left, fy - fItemHeight, rcBody.right, fy);
+              sBody << "q\n" << CPVT_GenerateAP::GenerateColorAP(
+                                    CPVT_Color(CPVT_Color::kRGB, 0,
+                                               51.0f / 255.0f, 113.0f / 255.0f),
+                                    TRUE)
+                    << rcItem.left << " " << rcItem.bottom << " "
+                    << rcItem.Width() << " " << rcItem.Height() << " re f\n"
+                    << "Q\n";
+              sBody << "BT\n" << CPVT_GenerateAP::GenerateColorAP(
+                                     CPVT_Color(CPVT_Color::kGray, 1), TRUE)
+                    << CPVT_GenerateAP::GenerateEditAP(&map, vt.GetIterator(),
+                                                       CFX_FloatPoint(0.0f, fy),
+                                                       TRUE, 0)
+                    << "ET\n";
+            } else {
+              sBody << "BT\n" << CPVT_GenerateAP::GenerateColorAP(crText, TRUE)
+                    << CPVT_GenerateAP::GenerateEditAP(&map, vt.GetIterator(),
+                                                       CFX_FloatPoint(0.0f, fy),
+                                                       TRUE, 0)
+                    << "ET\n";
+            }
+            fy -= fItemHeight;
+          }
+        }
+      }
+      if (sBody.GetSize() > 0) {
+        sAppStream << "/Tx BMC\n"
+                   << "q\n";
+        sAppStream << rcBody.left << " " << rcBody.bottom << " "
+                   << rcBody.Width() << " " << rcBody.Height() << " re\nW\nn\n";
+        sAppStream << sBody.GetByteString() << "Q\nEMC\n";
+      }
+    } break;
+  }
+  if (pNormalStream) {
+    pNormalStream->SetData((uint8_t*)sAppStream.GetBuffer(),
+                           sAppStream.GetSize(), FALSE, FALSE);
+    pStreamDict = pNormalStream->GetDict();
+    if (pStreamDict) {
+      pStreamDict->SetAtMatrix("Matrix", matrix);
+      pStreamDict->SetAtRect("BBox", rcBBox);
+      CPDF_Dictionary* pStreamResList = pStreamDict->GetDictBy("Resources");
+      if (pStreamResList) {
+        CPDF_Dictionary* pStreamResFontList = pStreamResList->GetDictBy("Font");
+        if (!pStreamResFontList) {
+          pStreamResFontList = new CPDF_Dictionary;
+          pStreamResList->SetAt("Font", pStreamResFontList);
+        }
+        if (!pStreamResFontList->KeyExist(sFontName)) {
+          pStreamResFontList->SetAtReference(sFontName, pDoc, pFontDict);
+        }
+      } else {
+        pStreamDict->SetAt("Resources", pFormDict->GetDictBy("DR")->Clone());
+        pStreamResList = pStreamDict->GetDictBy("Resources");
+      }
+    }
+  }
+  return TRUE;
+}
+FX_BOOL CPVT_GenerateAP::GenerateTextFieldAP(CPDF_Document* pDoc,
+                                             CPDF_Dictionary* pAnnotDict) {
+  return GenerateWidgetAP(pDoc, pAnnotDict, 0);
+}
+FX_BOOL CPVT_GenerateAP::GenerateComboBoxAP(CPDF_Document* pDoc,
+                                            CPDF_Dictionary* pAnnotDict) {
+  return GenerateWidgetAP(pDoc, pAnnotDict, 1);
+}
+FX_BOOL CPVT_GenerateAP::GenerateListBoxAP(CPDF_Document* pDoc,
+                                           CPDF_Dictionary* pAnnotDict) {
+  return GenerateWidgetAP(pDoc, pAnnotDict, 2);
+}
+CFX_ByteString CPVT_GenerateAP::GenerateEditAP(
+    IPVT_FontMap* pFontMap,
+    IPDF_VariableText_Iterator* pIterator,
+    const CFX_FloatPoint& ptOffset,
+    FX_BOOL bContinuous,
+    FX_WORD SubWord,
+    const CPVT_WordRange* pVisible) {
+  CFX_ByteTextBuf sEditStream, sLineStream, sWords;
+  CFX_FloatPoint ptOld(0.0f, 0.0f), ptNew(0.0f, 0.0f);
+  int32_t nCurFontIndex = -1;
+  if (pIterator) {
+    if (pVisible) {
+      pIterator->SetAt(pVisible->BeginPos);
+    } else {
+      pIterator->SetAt(0);
+    }
+    CPVT_WordPlace oldplace;
+    while (pIterator->NextWord()) {
+      CPVT_WordPlace place = pIterator->GetAt();
+      if (pVisible && place.WordCmp(pVisible->EndPos) > 0) {
+        break;
+      }
+      if (bContinuous) {
+        if (place.LineCmp(oldplace) != 0) {
+          if (sWords.GetSize() > 0) {
+            sLineStream << GetWordRenderString(sWords.GetByteString());
+            sEditStream << sLineStream;
+            sLineStream.Clear();
+            sWords.Clear();
+          }
+          CPVT_Word word;
+          if (pIterator->GetWord(word)) {
+            ptNew = CFX_FloatPoint(word.ptWord.x + ptOffset.x,
+                                   word.ptWord.y + ptOffset.y);
+          } else {
+            CPVT_Line line;
+            pIterator->GetLine(line);
+            ptNew = CFX_FloatPoint(line.ptLine.x + ptOffset.x,
+                                   line.ptLine.y + ptOffset.y);
+          }
+          if (ptNew.x != ptOld.x || ptNew.y != ptOld.y) {
+            sLineStream << ptNew.x - ptOld.x << " " << ptNew.y - ptOld.y
+                        << " Td\n";
+            ptOld = ptNew;
+          }
+        }
+        CPVT_Word word;
+        if (pIterator->GetWord(word)) {
+          if (word.nFontIndex != nCurFontIndex) {
+            if (sWords.GetSize() > 0) {
+              sLineStream << GetWordRenderString(sWords.GetByteString());
+              sWords.Clear();
+            }
+            sLineStream << GetFontSetString(pFontMap, word.nFontIndex,
+                                            word.fFontSize);
+            nCurFontIndex = word.nFontIndex;
+          }
+          sWords << GetPDFWordString(pFontMap, nCurFontIndex, word.Word,
+                                     SubWord);
+        }
+        oldplace = place;
+      } else {
+        CPVT_Word word;
+        if (pIterator->GetWord(word)) {
+          ptNew = CFX_FloatPoint(word.ptWord.x + ptOffset.x,
+                                 word.ptWord.y + ptOffset.y);
+          if (ptNew.x != ptOld.x || ptNew.y != ptOld.y) {
+            sEditStream << ptNew.x - ptOld.x << " " << ptNew.y - ptOld.y
+                        << " Td\n";
+            ptOld = ptNew;
+          }
+          if (word.nFontIndex != nCurFontIndex) {
+            sEditStream << GetFontSetString(pFontMap, word.nFontIndex,
+                                            word.fFontSize);
+            nCurFontIndex = word.nFontIndex;
+          }
+          sEditStream << GetWordRenderString(
+              GetPDFWordString(pFontMap, nCurFontIndex, word.Word, SubWord));
+        }
+      }
+    }
+    if (sWords.GetSize() > 0) {
+      sLineStream << GetWordRenderString(sWords.GetByteString());
+      sEditStream << sLineStream;
+      sWords.Clear();
+    }
+  }
+  return sEditStream.GetByteString();
+}
+CFX_ByteString CPVT_GenerateAP::GenerateBorderAP(
+    const CFX_FloatRect& rect,
+    FX_FLOAT fWidth,
+    const CPVT_Color& color,
+    const CPVT_Color& crLeftTop,
+    const CPVT_Color& crRightBottom,
+    int32_t nStyle,
+    const CPVT_Dash& dash) {
+  CFX_ByteTextBuf sAppStream;
+  CFX_ByteString sColor;
+  FX_FLOAT fLeft = rect.left;
+  FX_FLOAT fRight = rect.right;
+  FX_FLOAT fTop = rect.top;
+  FX_FLOAT fBottom = rect.bottom;
+  if (fWidth > 0.0f) {
+    FX_FLOAT fHalfWidth = fWidth / 2.0f;
+    switch (nStyle) {
+      default:
+      case PBS_SOLID:
+        sColor = GenerateColorAP(color, TRUE);
+        if (sColor.GetLength() > 0) {
+          sAppStream << sColor;
+          sAppStream << fLeft << " " << fBottom << " " << fRight - fLeft << " "
+                     << fTop - fBottom << " re\n";
+          sAppStream << fLeft + fWidth << " " << fBottom + fWidth << " "
+                     << fRight - fLeft - fWidth * 2 << " "
+                     << fTop - fBottom - fWidth * 2 << " re\n";
+          sAppStream << "f*\n";
+        }
+        break;
+      case PBS_DASH:
+        sColor = GenerateColorAP(color, FALSE);
+        if (sColor.GetLength() > 0) {
+          sAppStream << sColor;
+          sAppStream << fWidth << " w"
+                     << " [" << dash.nDash << " " << dash.nGap << "] "
+                     << dash.nPhase << " d\n";
+          sAppStream << fLeft + fWidth / 2 << " " << fBottom + fWidth / 2
+                     << " m\n";
+          sAppStream << fLeft + fWidth / 2 << " " << fTop - fWidth / 2
+                     << " l\n";
+          sAppStream << fRight - fWidth / 2 << " " << fTop - fWidth / 2
+                     << " l\n";
+          sAppStream << fRight - fWidth / 2 << " " << fBottom + fWidth / 2
+                     << " l\n";
+          sAppStream << fLeft + fWidth / 2 << " " << fBottom + fWidth / 2
+                     << " l S\n";
+        }
+        break;
+      case PBS_BEVELED:
+      case PBS_INSET:
+        sColor = GenerateColorAP(crLeftTop, TRUE);
+        if (sColor.GetLength() > 0) {
+          sAppStream << sColor;
+          sAppStream << fLeft + fHalfWidth << " " << fBottom + fHalfWidth
+                     << " m\n";
+          sAppStream << fLeft + fHalfWidth << " " << fTop - fHalfWidth
+                     << " l\n";
+          sAppStream << fRight - fHalfWidth << " " << fTop - fHalfWidth
+                     << " l\n";
+          sAppStream << fRight - fHalfWidth * 2 << " " << fTop - fHalfWidth * 2
+                     << " l\n";
+          sAppStream << fLeft + fHalfWidth * 2 << " " << fTop - fHalfWidth * 2
+                     << " l\n";
+          sAppStream << fLeft + fHalfWidth * 2 << " "
+                     << fBottom + fHalfWidth * 2 << " l f\n";
+        }
+        sColor = GenerateColorAP(crRightBottom, TRUE);
+        if (sColor.GetLength() > 0) {
+          sAppStream << sColor;
+          sAppStream << fRight - fHalfWidth << " " << fTop - fHalfWidth
+                     << " m\n";
+          sAppStream << fRight - fHalfWidth << " " << fBottom + fHalfWidth
+                     << " l\n";
+          sAppStream << fLeft + fHalfWidth << " " << fBottom + fHalfWidth
+                     << " l\n";
+          sAppStream << fLeft + fHalfWidth * 2 << " "
+                     << fBottom + fHalfWidth * 2 << " l\n";
+          sAppStream << fRight - fHalfWidth * 2 << " "
+                     << fBottom + fHalfWidth * 2 << " l\n";
+          sAppStream << fRight - fHalfWidth * 2 << " " << fTop - fHalfWidth * 2
+                     << " l f\n";
+        }
+        sColor = GenerateColorAP(color, TRUE);
+        if (sColor.GetLength() > 0) {
+          sAppStream << sColor;
+          sAppStream << fLeft << " " << fBottom << " " << fRight - fLeft << " "
+                     << fTop - fBottom << " re\n";
+          sAppStream << fLeft + fHalfWidth << " " << fBottom + fHalfWidth << " "
+                     << fRight - fLeft - fHalfWidth * 2 << " "
+                     << fTop - fBottom - fHalfWidth * 2 << " re f*\n";
+        }
+        break;
+      case PBS_UNDERLINED:
+        sColor = GenerateColorAP(color, FALSE);
+        if (sColor.GetLength() > 0) {
+          sAppStream << sColor;
+          sAppStream << fWidth << " w\n";
+          sAppStream << fLeft << " " << fBottom + fWidth / 2 << " m\n";
+          sAppStream << fRight << " " << fBottom + fWidth / 2 << " l S\n";
+        }
+        break;
+    }
+  }
+  return sAppStream.GetByteString();
+}
+CFX_ByteString CPVT_GenerateAP::GenerateColorAP(const CPVT_Color& color,
+                                                const FX_BOOL& bFillOrStroke) {
+  CFX_ByteTextBuf sColorStream;
+  switch (color.nColorType) {
+    case CPVT_Color::kRGB:
+      sColorStream << color.fColor1 << " " << color.fColor2 << " "
+                   << color.fColor3 << " " << (bFillOrStroke ? "rg" : "RG")
+                   << "\n";
+      break;
+    case CPVT_Color::kGray:
+      sColorStream << color.fColor1 << " " << (bFillOrStroke ? "g" : "G")
+                   << "\n";
+      break;
+    case CPVT_Color::kCMYK:
+      sColorStream << color.fColor1 << " " << color.fColor2 << " "
+                   << color.fColor3 << " " << color.fColor4 << " "
+                   << (bFillOrStroke ? "k" : "K") << "\n";
+      break;
+    case CPVT_Color::kTransparent:
+      break;
+  }
+  return sColorStream.GetByteString();
+}
diff --git a/core/fpdfdoc/doc_basic.cpp b/core/fpdfdoc/doc_basic.cpp
new file mode 100644
index 0000000000..b3a6511734
--- /dev/null
+++ b/core/fpdfdoc/doc_basic.cpp
@@ -0,0 +1,510 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fpdfdoc/doc_utils.h"
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+
+const int nMaxRecursion = 32;
+int CPDF_Dest::GetPageIndex(CPDF_Document* pDoc) {
+  CPDF_Array* pArray = ToArray(m_pObj);
+  if (!pArray)
+    return 0;
+
+  CPDF_Object* pPage = pArray->GetElementValue(0);
+  if (!pPage)
+    return 0;
+  if (pPage->IsNumber())
+    return pPage->GetInteger();
+  if (!pPage->IsDictionary())
+    return 0;
+  return pDoc->GetPageIndex(pPage->GetObjNum());
+}
+FX_DWORD CPDF_Dest::GetPageObjNum() {
+  CPDF_Array* pArray = ToArray(m_pObj);
+  if (!pArray)
+    return 0;
+
+  CPDF_Object* pPage = pArray->GetElementValue(0);
+  if (!pPage)
+    return 0;
+  if (pPage->IsNumber())
+    return pPage->GetInteger();
+  if (pPage->IsDictionary())
+    return pPage->GetObjNum();
+  return 0;
+}
+const FX_CHAR* g_sZoomModes[] = {"XYZ",  "Fit",   "FitH",  "FitV", "FitR",
+                                 "FitB", "FitBH", "FitBV", ""};
+int CPDF_Dest::GetZoomMode() {
+  CPDF_Array* pArray = ToArray(m_pObj);
+  if (!pArray)
+    return 0;
+
+  CFX_ByteString mode;
+  CPDF_Object* pObj = pArray->GetElementValue(1);
+  mode = pObj ? pObj->GetString() : CFX_ByteString();
+  int i = 0;
+  while (g_sZoomModes[i][0] != '\0') {
+    if (mode == g_sZoomModes[i]) {
+      return i + 1;
+    }
+    i++;
+  }
+  return 0;
+}
+FX_FLOAT CPDF_Dest::GetParam(int index) {
+  CPDF_Array* pArray = ToArray(m_pObj);
+  return pArray ? pArray->GetNumberAt(2 + index) : 0;
+}
+CFX_ByteString CPDF_Dest::GetRemoteName() {
+  return m_pObj ? m_pObj->GetString() : CFX_ByteString();
+}
+CPDF_NameTree::CPDF_NameTree(CPDF_Document* pDoc,
+                             const CFX_ByteStringC& category) {
+  if (pDoc->GetRoot() && pDoc->GetRoot()->GetDictBy("Names"))
+    m_pRoot = pDoc->GetRoot()->GetDictBy("Names")->GetDictBy(category);
+  else
+    m_pRoot = NULL;
+}
+static CPDF_Object* SearchNameNode(CPDF_Dictionary* pNode,
+                                   const CFX_ByteString& csName,
+                                   int& nIndex,
+                                   CPDF_Array** ppFind,
+                                   int nLevel = 0) {
+  if (nLevel > nMaxRecursion) {
+    return NULL;
+  }
+  CPDF_Array* pLimits = pNode->GetArrayBy("Limits");
+  if (pLimits) {
+    CFX_ByteString csLeft = pLimits->GetStringAt(0);
+    CFX_ByteString csRight = pLimits->GetStringAt(1);
+    if (csLeft.Compare(csRight) > 0) {
+      CFX_ByteString csTmp = csRight;
+      csRight = csLeft;
+      csLeft = csTmp;
+    }
+    if (csName.Compare(csLeft) < 0 || csName.Compare(csRight) > 0) {
+      return NULL;
+    }
+  }
+  CPDF_Array* pNames = pNode->GetArrayBy("Names");
+  if (pNames) {
+    FX_DWORD dwCount = pNames->GetCount() / 2;
+    for (FX_DWORD i = 0; i < dwCount; i++) {
+      CFX_ByteString csValue = pNames->GetStringAt(i * 2);
+      int32_t iCompare = csValue.Compare(csName);
+      if (iCompare <= 0) {
+        if (ppFind) {
+          *ppFind = pNames;
+        }
+        if (iCompare < 0) {
+          continue;
+        }
+      } else {
+        break;
+      }
+      nIndex += i;
+      return pNames->GetElementValue(i * 2 + 1);
+    }
+    nIndex += dwCount;
+    return NULL;
+  }
+  CPDF_Array* pKids = pNode->GetArrayBy("Kids");
+  if (!pKids) {
+    return NULL;
+  }
+  for (FX_DWORD i = 0; i < pKids->GetCount(); i++) {
+    CPDF_Dictionary* pKid = pKids->GetDictAt(i);
+    if (!pKid) {
+      continue;
+    }
+    CPDF_Object* pFound =
+        SearchNameNode(pKid, csName, nIndex, ppFind, nLevel + 1);
+    if (pFound) {
+      return pFound;
+    }
+  }
+  return NULL;
+}
+static CPDF_Object* SearchNameNode(CPDF_Dictionary* pNode,
+                                   int nIndex,
+                                   int& nCurIndex,
+                                   CFX_ByteString& csName,
+                                   CPDF_Array** ppFind,
+                                   int nLevel = 0) {
+  if (nLevel > nMaxRecursion) {
+    return NULL;
+  }
+  CPDF_Array* pNames = pNode->GetArrayBy("Names");
+  if (pNames) {
+    int nCount = pNames->GetCount() / 2;
+    if (nIndex >= nCurIndex + nCount) {
+      nCurIndex += nCount;
+      return NULL;
+    }
+    if (ppFind) {
+      *ppFind = pNames;
+    }
+    csName = pNames->GetStringAt((nIndex - nCurIndex) * 2);
+    return pNames->GetElementValue((nIndex - nCurIndex) * 2 + 1);
+  }
+  CPDF_Array* pKids = pNode->GetArrayBy("Kids");
+  if (!pKids) {
+    return NULL;
+  }
+  for (FX_DWORD i = 0; i < pKids->GetCount(); i++) {
+    CPDF_Dictionary* pKid = pKids->GetDictAt(i);
+    if (!pKid) {
+      continue;
+    }
+    CPDF_Object* pFound =
+        SearchNameNode(pKid, nIndex, nCurIndex, csName, ppFind, nLevel + 1);
+    if (pFound) {
+      return pFound;
+    }
+  }
+  return NULL;
+}
+static int CountNames(CPDF_Dictionary* pNode, int nLevel = 0) {
+  if (nLevel > nMaxRecursion) {
+    return 0;
+  }
+  CPDF_Array* pNames = pNode->GetArrayBy("Names");
+  if (pNames) {
+    return pNames->GetCount() / 2;
+  }
+  CPDF_Array* pKids = pNode->GetArrayBy("Kids");
+  if (!pKids) {
+    return 0;
+  }
+  int nCount = 0;
+  for (FX_DWORD i = 0; i < pKids->GetCount(); i++) {
+    CPDF_Dictionary* pKid = pKids->GetDictAt(i);
+    if (!pKid) {
+      continue;
+    }
+    nCount += CountNames(pKid, nLevel + 1);
+  }
+  return nCount;
+}
+int CPDF_NameTree::GetCount() const {
+  if (!m_pRoot) {
+    return 0;
+  }
+  return ::CountNames(m_pRoot);
+}
+int CPDF_NameTree::GetIndex(const CFX_ByteString& csName) const {
+  if (!m_pRoot) {
+    return -1;
+  }
+  int nIndex = 0;
+  if (!SearchNameNode(m_pRoot, csName, nIndex, NULL)) {
+    return -1;
+  }
+  return nIndex;
+}
+CPDF_Object* CPDF_NameTree::LookupValue(int nIndex,
+                                        CFX_ByteString& csName) const {
+  if (!m_pRoot) {
+    return NULL;
+  }
+  int nCurIndex = 0;
+  return SearchNameNode(m_pRoot, nIndex, nCurIndex, csName, NULL);
+}
+CPDF_Object* CPDF_NameTree::LookupValue(const CFX_ByteString& csName) const {
+  if (!m_pRoot) {
+    return NULL;
+  }
+  int nIndex = 0;
+  return SearchNameNode(m_pRoot, csName, nIndex, NULL);
+}
+CPDF_Array* CPDF_NameTree::LookupNamedDest(CPDF_Document* pDoc,
+                                           const CFX_ByteStringC& sName) {
+  CPDF_Object* pValue = LookupValue(sName);
+  if (!pValue) {
+    CPDF_Dictionary* pDests = pDoc->GetRoot()->GetDictBy("Dests");
+    if (!pDests)
+      return nullptr;
+    pValue = pDests->GetElementValue(sName);
+  }
+  if (!pValue)
+    return nullptr;
+  if (CPDF_Array* pArray = pValue->AsArray())
+    return pArray;
+  if (CPDF_Dictionary* pDict = pValue->AsDictionary())
+    return pDict->GetArrayBy("D");
+  return nullptr;
+}
+
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ || \
+    _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+static CFX_WideString ChangeSlashToPlatform(const FX_WCHAR* str) {
+  CFX_WideString result;
+  while (*str) {
+    if (*str == '/') {
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+      result += ':';
+#else
+      result += '\\';
+#endif
+    } else {
+      result += *str;
+    }
+    str++;
+  }
+  return result;
+}
+
+static CFX_WideString ChangeSlashToPDF(const FX_WCHAR* str) {
+  CFX_WideString result;
+  while (*str) {
+    if (*str == '\\' || *str == ':') {
+      result += '/';
+    } else {
+      result += *str;
+    }
+    str++;
+  }
+  return result;
+}
+#endif  // _FXM_PLATFORM_APPLE_ || _FXM_PLATFORM_WINDOWS_
+
+CFX_WideString CPDF_FileSpec::DecodeFileName(const CFX_WideStringC& filepath) {
+  if (filepath.GetLength() <= 1)
+    return CFX_WideString();
+
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+  if (filepath.Left(sizeof("/Mac") - 1) == CFX_WideStringC(L"/Mac"))
+    return ChangeSlashToPlatform(filepath.GetPtr() + 1);
+  return ChangeSlashToPlatform(filepath.GetPtr());
+#elif _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+  if (filepath.GetAt(0) != '/')
+    return ChangeSlashToPlatform(filepath.GetPtr());
+  if (filepath.GetAt(1) == '/')
+    return ChangeSlashToPlatform(filepath.GetPtr() + 1);
+  if (filepath.GetAt(2) == '/') {
+    CFX_WideString result;
+    result += filepath.GetAt(1);
+    result += ':';
+    result += ChangeSlashToPlatform(filepath.GetPtr() + 2);
+    return result;
+  }
+  CFX_WideString result;
+  result += '\\';
+  result += ChangeSlashToPlatform(filepath.GetPtr());
+  return result;
+#else
+  return filepath;
+#endif
+}
+
+bool CPDF_FileSpec::GetFileName(CFX_WideString* csFileName) const {
+  if (CPDF_Dictionary* pDict = m_pObj->AsDictionary()) {
+    *csFileName = pDict->GetUnicodeTextBy("UF");
+    if (csFileName->IsEmpty()) {
+      *csFileName = CFX_WideString::FromLocal(pDict->GetStringBy("F"));
+    }
+    if (pDict->GetStringBy("FS") == "URL")
+      return true;
+    if (csFileName->IsEmpty()) {
+      if (pDict->KeyExist("DOS")) {
+        *csFileName = CFX_WideString::FromLocal(pDict->GetStringBy("DOS"));
+      } else if (pDict->KeyExist("Mac")) {
+        *csFileName = CFX_WideString::FromLocal(pDict->GetStringBy("Mac"));
+      } else if (pDict->KeyExist("Unix")) {
+        *csFileName = CFX_WideString::FromLocal(pDict->GetStringBy("Unix"));
+      } else {
+        return false;
+      }
+    }
+  } else if (m_pObj->IsString()) {
+    *csFileName = CFX_WideString::FromLocal(m_pObj->GetString());
+  } else {
+    return false;
+  }
+  *csFileName = DecodeFileName(*csFileName);
+  return true;
+}
+
+CPDF_FileSpec::CPDF_FileSpec() {
+  m_pObj = new CPDF_Dictionary;
+  m_pObj->AsDictionary()->SetAtName("Type", "Filespec");
+}
+
+CFX_WideString CPDF_FileSpec::EncodeFileName(const CFX_WideStringC& filepath) {
+  if (filepath.GetLength() <= 1) {
+    return CFX_WideString();
+  }
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+  if (filepath.GetAt(1) == ':') {
+    CFX_WideString result;
+    result = '/';
+    result += filepath.GetAt(0);
+    if (filepath.GetAt(2) != '\\') {
+      result += '/';
+    }
+    result += ChangeSlashToPDF(filepath.GetPtr() + 2);
+    return result;
+  }
+  if (filepath.GetAt(0) == '\\' && filepath.GetAt(1) == '\\') {
+    return ChangeSlashToPDF(filepath.GetPtr() + 1);
+  }
+  if (filepath.GetAt(0) == '\\') {
+    CFX_WideString result;
+    result = '/';
+    result += ChangeSlashToPDF(filepath.GetPtr());
+    return result;
+  }
+  return ChangeSlashToPDF(filepath.GetPtr());
+#elif _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+  if (filepath.Left(sizeof("Mac") - 1) == FX_WSTRC(L"Mac")) {
+    CFX_WideString result;
+    result = '/';
+    result += ChangeSlashToPDF(filepath.GetPtr());
+    return result;
+  }
+  return ChangeSlashToPDF(filepath.GetPtr());
+#else
+  return filepath;
+#endif
+}
+
+void CPDF_FileSpec::SetFileName(const CFX_WideStringC& wsFileName) {
+  if (!m_pObj)
+    return;
+
+  CFX_WideString wsStr = EncodeFileName(wsFileName);
+  if (m_pObj->IsString()) {
+    m_pObj->SetString(CFX_ByteString::FromUnicode(wsStr));
+  } else if (CPDF_Dictionary* pDict = m_pObj->AsDictionary()) {
+    pDict->SetAtString("F", CFX_ByteString::FromUnicode(wsStr));
+    pDict->SetAtString("UF", PDF_EncodeText(wsStr));
+  }
+}
+
+static CFX_WideString _MakeRoman(int num) {
+  const int arabic[] = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
+  const CFX_WideString roman[] = {L"m",  L"cm", L"d",  L"cd", L"c",
+                                  L"xc", L"l",  L"xl", L"x",  L"ix",
+                                  L"v",  L"iv", L"i"};
+  const int nMaxNum = 1000000;
+  num %= nMaxNum;
+  int i = 0;
+  CFX_WideString wsRomanNumber;
+  while (num > 0) {
+    while (num >= arabic[i]) {
+      num = num - arabic[i];
+      wsRomanNumber += roman[i];
+    }
+    i = i + 1;
+  }
+  return wsRomanNumber;
+}
+
+static CFX_WideString _MakeLetters(int num) {
+  if (num == 0) {
+    return CFX_WideString();
+  }
+  CFX_WideString wsLetters;
+  const int nMaxCount = 1000;
+  const int nLetterCount = 26;
+  num -= 1;
+  int count = num / nLetterCount + 1;
+  count %= nMaxCount;
+  FX_WCHAR ch = L'a' + num % nLetterCount;
+  for (int i = 0; i < count; i++) {
+    wsLetters += ch;
+  }
+  return wsLetters;
+}
+static CFX_WideString _GetLabelNumPortion(int num,
+                                          const CFX_ByteString& bsStyle) {
+  CFX_WideString wsNumPortion;
+  if (bsStyle.IsEmpty()) {
+    return wsNumPortion;
+  }
+  if (bsStyle == "D") {
+    wsNumPortion.Format(L"%d", num);
+  } else if (bsStyle == "R") {
+    wsNumPortion = _MakeRoman(num);
+    wsNumPortion.MakeUpper();
+  } else if (bsStyle == "r") {
+    wsNumPortion = _MakeRoman(num);
+  } else if (bsStyle == "A") {
+    wsNumPortion = _MakeLetters(num);
+    wsNumPortion.MakeUpper();
+  } else if (bsStyle == "a") {
+    wsNumPortion = _MakeLetters(num);
+  }
+  return wsNumPortion;
+}
+CFX_WideString CPDF_PageLabel::GetLabel(int nPage) const {
+  CFX_WideString wsLabel;
+  if (!m_pDocument) {
+    return wsLabel;
+  }
+  CPDF_Dictionary* pPDFRoot = m_pDocument->GetRoot();
+  if (!pPDFRoot) {
+    return wsLabel;
+  }
+  CPDF_Dictionary* pLabels = pPDFRoot->GetDictBy("PageLabels");
+  CPDF_NumberTree numberTree(pLabels);
+  CPDF_Object* pValue = NULL;
+  int n = nPage;
+  while (n >= 0) {
+    pValue = numberTree.LookupValue(n);
+    if (pValue) {
+      break;
+    }
+    n--;
+  }
+  if (pValue) {
+    pValue = pValue->GetDirect();
+    if (CPDF_Dictionary* pLabel = pValue->AsDictionary()) {
+      if (pLabel->KeyExist("P")) {
+        wsLabel += pLabel->GetUnicodeTextBy("P");
+      }
+      CFX_ByteString bsNumberingStyle = pLabel->GetStringBy("S", NULL);
+      int nLabelNum = nPage - n + pLabel->GetIntegerBy("St", 1);
+      CFX_WideString wsNumPortion =
+          _GetLabelNumPortion(nLabelNum, bsNumberingStyle);
+      wsLabel += wsNumPortion;
+      return wsLabel;
+    }
+  }
+  wsLabel.Format(L"%d", nPage + 1);
+  return wsLabel;
+}
+int32_t CPDF_PageLabel::GetPageByLabel(const CFX_ByteStringC& bsLabel) const {
+  if (!m_pDocument) {
+    return -1;
+  }
+  CPDF_Dictionary* pPDFRoot = m_pDocument->GetRoot();
+  if (!pPDFRoot) {
+    return -1;
+  }
+  int nPages = m_pDocument->GetPageCount();
+  CFX_ByteString bsLbl;
+  CFX_ByteString bsOrig = bsLabel;
+  for (int i = 0; i < nPages; i++) {
+    bsLbl = PDF_EncodeText(GetLabel(i));
+    if (!bsLbl.Compare(bsOrig)) {
+      return i;
+    }
+  }
+  bsLbl = bsOrig;
+  int nPage = FXSYS_atoi(bsLbl);
+  if (nPage > 0 && nPage <= nPages) {
+    return nPage;
+  }
+  return -1;
+}
+int32_t CPDF_PageLabel::GetPageByLabel(const CFX_WideStringC& wsLabel) const {
+  CFX_ByteString bsLabel = PDF_EncodeText(wsLabel.GetPtr());
+  return GetPageByLabel(bsLabel);
+}
diff --git a/core/fpdfdoc/doc_basic_unittest.cpp b/core/fpdfdoc/doc_basic_unittest.cpp
new file mode 100644
index 0000000000..659643851d
--- /dev/null
+++ b/core/fpdfdoc/doc_basic_unittest.cpp
@@ -0,0 +1,169 @@
+// Copyright 2016 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/include/fpdfdoc/fpdf_doc.h"
+
+#include <memory>
+#include <vector>
+
+#include "core/include/fpdfapi/cpdf_name.h"
+#include "core/include/fpdfapi/cpdf_string.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/test_support.h"
+
+namespace {
+
+using ScopedObj = std::unique_ptr<CPDF_Object, ReleaseDeleter<CPDF_Object>>;
+using ScopedDict =
+    std::unique_ptr<CPDF_Dictionary, ReleaseDeleter<CPDF_Dictionary>>;
+}
+
+TEST(doc_basic_filespec, EncodeDecodeFileName) {
+  std::vector<pdfium::NullTermWstrFuncTestData> test_data = {
+    // Empty src string.
+    {L"", L""},
+    // only file name.
+    {L"test.pdf", L"test.pdf"},
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+    // With drive identifier.
+    {L"r:\\pdfdocs\\spec.pdf", L"/r/pdfdocs/spec.pdf"},
+    // Relative path.
+    {L"My Document\\test.pdf", L"My Document/test.pdf"},
+    // Absolute path without drive identifier.
+    {L"\\pdfdocs\\spec.pdf", L"//pdfdocs/spec.pdf"},
+    // Absolute path with double backslashes.
+    {L"\\\\pdfdocs\\spec.pdf", L"/pdfdocs/spec.pdf"},
+// Network resource name. It is not supported yet.
+// {L"pclib/eng:\\pdfdocs\\spec.pdf", L"/pclib/eng/pdfdocs/spec.pdf"},
+#elif _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+    // Absolute path with colon separator.
+    {L"Mac HD:PDFDocs:spec.pdf", L"/Mac HD/PDFDocs/spec.pdf"},
+    // Relative path with colon separator.
+    {L"PDFDocs:spec.pdf", L"PDFDocs/spec.pdf"},
+#else
+    // Relative path.
+    {L"./docs/test.pdf", L"./docs/test.pdf"},
+    // Relative path with parent dir.
+    {L"../test_docs/test.pdf", L"../test_docs/test.pdf"},
+    // Absolute path.
+    {L"/usr/local/home/test.pdf", L"/usr/local/home/test.pdf"},
+#endif
+  };
+  for (const auto& data : test_data) {
+    CFX_WideString encoded_str = CPDF_FileSpec::EncodeFileName(data.input);
+    EXPECT_TRUE(encoded_str.Equal(data.expected));
+    // DecodeFileName is the reverse procedure of EncodeFileName.
+    CFX_WideString decoded_str = CPDF_FileSpec::DecodeFileName(data.expected);
+    EXPECT_TRUE(decoded_str.Equal(data.input));
+  }
+}
+
+TEST(doc_basic_filespec, GetFileName) {
+  {
+    // String object.
+    pdfium::NullTermWstrFuncTestData test_data = {
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+      L"/C/docs/test.pdf",
+      L"C:\\docs\\test.pdf"
+#elif _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+      L"/Mac HD/docs/test.pdf",
+      L"Mac HD:docs:test.pdf"
+#else
+      L"/docs/test.pdf",
+      L"/docs/test.pdf"
+#endif
+    };
+    ScopedObj str_obj(new CPDF_String(test_data.input));
+    CPDF_FileSpec file_spec(str_obj.get());
+    CFX_WideString file_name;
+    EXPECT_TRUE(file_spec.GetFileName(&file_name));
+    EXPECT_TRUE(file_name.Equal(test_data.expected));
+  }
+  {
+    // Dictionary object.
+    pdfium::NullTermWstrFuncTestData test_data[5] = {
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+      {L"/C/docs/test.pdf", L"C:\\docs\\test.pdf"},
+      {L"/D/docs/test.pdf", L"D:\\docs\\test.pdf"},
+      {L"/E/docs/test.pdf", L"E:\\docs\\test.pdf"},
+      {L"/F/docs/test.pdf", L"F:\\docs\\test.pdf"},
+      {L"/G/docs/test.pdf", L"G:\\docs\\test.pdf"},
+#elif _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+      {L"/Mac HD/docs1/test.pdf", L"Mac HD:docs1:test.pdf"},
+      {L"/Mac HD/docs2/test.pdf", L"Mac HD:docs2:test.pdf"},
+      {L"/Mac HD/docs3/test.pdf", L"Mac HD:docs3:test.pdf"},
+      {L"/Mac HD/docs4/test.pdf", L"Mac HD:docs4:test.pdf"},
+      {L"/Mac HD/docs5/test.pdf", L"Mac HD:docs5:test.pdf"},
+#else
+      {L"/docs/a/test.pdf", L"/docs/a/test.pdf"},
+      {L"/docs/b/test.pdf", L"/docs/b/test.pdf"},
+      {L"/docs/c/test.pdf", L"/docs/c/test.pdf"},
+      {L"/docs/d/test.pdf", L"/docs/d/test.pdf"},
+      {L"/docs/e/test.pdf", L"/docs/e/test.pdf"},
+#endif
+    };
+    // Keyword fields in reverse order of precedence to retrieve the file name.
+    const char* const keywords[5] = {"Unix", "Mac", "DOS", "F", "UF"};
+    ScopedDict dict_obj(new CPDF_Dictionary);
+    CPDF_FileSpec file_spec(dict_obj.get());
+    CFX_WideString file_name;
+    for (int i = 0; i < 5; ++i) {
+      dict_obj->SetAt(keywords[i], new CPDF_String(test_data[i].input));
+      EXPECT_TRUE(file_spec.GetFileName(&file_name));
+      EXPECT_TRUE(file_name.Equal(test_data[i].expected));
+    }
+
+    // With all the former fields and 'FS' field suggests 'URL' type.
+    dict_obj->SetAtString("FS", "URL");
+    EXPECT_TRUE(file_spec.GetFileName(&file_name));
+    // Url string is not decoded.
+    EXPECT_TRUE(file_name.Equal(test_data[4].input));
+  }
+  {
+    // Invalid object.
+    ScopedObj name_obj(new CPDF_Name("test.pdf"));
+    CPDF_FileSpec file_spec(name_obj.get());
+    CFX_WideString file_name;
+    EXPECT_FALSE(file_spec.GetFileName(&file_name));
+  }
+}
+
+TEST(doc_basic_filespec, SetFileName) {
+  pdfium::NullTermWstrFuncTestData test_data = {
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+    L"C:\\docs\\test.pdf",
+    L"/C/docs/test.pdf"
+#elif _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+    L"Mac HD:docs:test.pdf",
+    L"/Mac HD/docs/test.pdf"
+#else
+    L"/docs/test.pdf",
+    L"/docs/test.pdf"
+#endif
+  };
+  // String object.
+  ScopedObj str_obj(new CPDF_String(L"babababa"));
+  CPDF_FileSpec file_spec1(str_obj.get());
+  file_spec1.SetFileName(test_data.input);
+  // Check internal object value.
+  CFX_ByteString str = CFX_ByteString::FromUnicode(test_data.expected);
+  EXPECT_TRUE(str == str_obj->GetString());
+  // Check we can get the file name back.
+  CFX_WideString file_name;
+  EXPECT_TRUE(file_spec1.GetFileName(&file_name));
+  EXPECT_TRUE(file_name.Equal(test_data.input));
+
+  // Dictionary object.
+  ScopedDict dict_obj(new CPDF_Dictionary);
+  CPDF_FileSpec file_spec2(dict_obj.get());
+  file_spec2.SetFileName(test_data.input);
+  // Check internal object value.
+  file_name = dict_obj->GetUnicodeTextBy("F");
+  EXPECT_TRUE(file_name.Equal(test_data.expected));
+  file_name = dict_obj->GetUnicodeTextBy("UF");
+  EXPECT_TRUE(file_name.Equal(test_data.expected));
+  // Check we can get the file name back.
+  EXPECT_TRUE(file_spec2.GetFileName(&file_name));
+  EXPECT_TRUE(file_name.Equal(test_data.input));
+}
diff --git a/core/fpdfdoc/doc_bookmark.cpp b/core/fpdfdoc/doc_bookmark.cpp
new file mode 100644
index 0000000000..c338e5d48c
--- /dev/null
+++ b/core/fpdfdoc/doc_bookmark.cpp
@@ -0,0 +1,95 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include <memory>
+#include <vector>
+
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfapi/cpdf_string.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+
+CPDF_Bookmark CPDF_BookmarkTree::GetFirstChild(
+    const CPDF_Bookmark& parent) const {
+  if (!parent.GetDict()) {
+    CPDF_Dictionary* pRoot = m_pDocument->GetRoot()->GetDictBy("Outlines");
+    if (!pRoot)
+      return CPDF_Bookmark();
+    return CPDF_Bookmark(pRoot->GetDictBy("First"));
+  }
+  return CPDF_Bookmark(parent.GetDict()->GetDictBy("First"));
+}
+
+CPDF_Bookmark CPDF_BookmarkTree::GetNextSibling(
+    const CPDF_Bookmark& bookmark) const {
+  if (!bookmark.GetDict())
+    return CPDF_Bookmark();
+
+  CPDF_Dictionary* pNext = bookmark.GetDict()->GetDictBy("Next");
+  return pNext == bookmark.GetDict() ? CPDF_Bookmark() : CPDF_Bookmark(pNext);
+}
+
+FX_DWORD CPDF_Bookmark::GetColorRef() const {
+  if (!m_pDict) {
+    return 0;
+  }
+  CPDF_Array* pColor = m_pDict->GetArrayBy("C");
+  if (!pColor) {
+    return FXSYS_RGB(0, 0, 0);
+  }
+  int r = FXSYS_round(pColor->GetNumberAt(0) * 255);
+  int g = FXSYS_round(pColor->GetNumberAt(1) * 255);
+  int b = FXSYS_round(pColor->GetNumberAt(2) * 255);
+  return FXSYS_RGB(r, g, b);
+}
+FX_DWORD CPDF_Bookmark::GetFontStyle() const {
+  if (!m_pDict) {
+    return 0;
+  }
+  return m_pDict->GetIntegerBy("F");
+}
+CFX_WideString CPDF_Bookmark::GetTitle() const {
+  if (!m_pDict) {
+    return CFX_WideString();
+  }
+  CPDF_String* pString = ToString(m_pDict->GetElementValue("Title"));
+  if (!pString)
+    return CFX_WideString();
+
+  CFX_WideString title = pString->GetUnicodeText();
+  int len = title.GetLength();
+  if (!len) {
+    return CFX_WideString();
+  }
+  std::unique_ptr<FX_WCHAR[]> buf(new FX_WCHAR[len]);
+  for (int i = 0; i < len; i++) {
+    FX_WCHAR w = title[i];
+    buf[i] = w > 0x20 ? w : 0x20;
+  }
+  return CFX_WideString(buf.get(), len);
+}
+CPDF_Dest CPDF_Bookmark::GetDest(CPDF_Document* pDocument) const {
+  if (!m_pDict)
+    return CPDF_Dest();
+
+  CPDF_Object* pDest = m_pDict->GetElementValue("Dest");
+  if (!pDest)
+    return CPDF_Dest();
+  if (pDest->IsString() || pDest->IsName()) {
+    CPDF_NameTree name_tree(pDocument, "Dests");
+    CFX_ByteStringC name = pDest->GetString();
+    return CPDF_Dest(name_tree.LookupNamedDest(pDocument, name));
+  }
+  if (CPDF_Array* pArray = pDest->AsArray())
+    return CPDF_Dest(pArray);
+  return CPDF_Dest();
+}
+CPDF_Action CPDF_Bookmark::GetAction() const {
+  if (!m_pDict) {
+    return CPDF_Action();
+  }
+  return CPDF_Action(m_pDict->GetDictBy("A"));
+}
diff --git a/core/fpdfdoc/doc_form.cpp b/core/fpdfdoc/doc_form.cpp
new file mode 100644
index 0000000000..c205588335
--- /dev/null
+++ b/core/fpdfdoc/doc_form.cpp
@@ -0,0 +1,1207 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include <vector>
+
+#include "core/fpdfdoc/doc_utils.h"
+#include "core/include/fpdfapi/cfdf_document.h"
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfapi/cpdf_string.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+#include "third_party/base/stl_util.h"
+
+namespace {
+
+const int nMaxRecursion = 32;
+
+const struct SupportFieldEncoding {
+  const FX_CHAR* m_name;
+  FX_WORD m_codePage;
+} g_fieldEncoding[] = {
+    {"BigFive", 950},
+    {"GBK", 936},
+    {"Shift-JIS", 932},
+    {"UHC", 949},
+};
+
+CFX_WideString FPDFDOC_FDF_GetFieldValue(const CPDF_Dictionary& pFieldDict,
+                                         const CFX_ByteString& bsEncoding) {
+  const CFX_ByteString csBValue = pFieldDict.GetStringBy("V");
+  for (const auto& encoding : g_fieldEncoding) {
+    if (bsEncoding == encoding.m_name)
+      return CFX_WideString::FromCodePage(csBValue, encoding.m_codePage);
+  }
+  CFX_ByteString csTemp = csBValue.Left(2);
+  if (csTemp == "\xFF\xFE" || csTemp == "\xFE\xFF")
+    return PDF_DecodeText(csBValue);
+  return CFX_WideString::FromLocal(csBValue);
+}
+
+}  // namespace
+
+class CFieldNameExtractor {
+ public:
+  explicit CFieldNameExtractor(const CFX_WideString& full_name) {
+    m_pStart = full_name.c_str();
+    m_pEnd = m_pStart + full_name.GetLength();
+    m_pCur = m_pStart;
+  }
+  void GetNext(const FX_WCHAR*& pSubName, FX_STRSIZE& size) {
+    pSubName = m_pCur;
+    while (m_pCur < m_pEnd && m_pCur[0] != L'.') {
+      m_pCur++;
+    }
+    size = (FX_STRSIZE)(m_pCur - pSubName);
+    if (m_pCur < m_pEnd && m_pCur[0] == L'.') {
+      m_pCur++;
+    }
+  }
+
+ protected:
+  const FX_WCHAR* m_pStart;
+  const FX_WCHAR* m_pEnd;
+  const FX_WCHAR* m_pCur;
+};
+class CFieldTree {
+ public:
+  struct _Node {
+    _Node* parent;
+    CFX_ArrayTemplate<_Node*> children;
+    CFX_WideString short_name;
+    CPDF_FormField* field_ptr;
+    int CountFields(int nLevel = 0) {
+      if (nLevel > nMaxRecursion) {
+        return 0;
+      }
+      if (field_ptr) {
+        return 1;
+      }
+      int count = 0;
+      for (int i = 0; i < children.GetSize(); i++) {
+        count += children.GetAt(i)->CountFields(nLevel + 1);
+      }
+      return count;
+    }
+    CPDF_FormField* GetField(int* fields_to_go) {
+      if (field_ptr) {
+        if (*fields_to_go == 0) {
+          return field_ptr;
+        }
+        --*fields_to_go;
+        return NULL;
+      }
+      for (int i = 0; i < children.GetSize(); i++) {
+        if (CPDF_FormField* pField = children.GetAt(i)->GetField(fields_to_go))
+          return pField;
+      }
+      return NULL;
+    }
+    CPDF_FormField* GetField(int index) {
+      int fields_to_go = index;
+      return GetField(&fields_to_go);
+    }
+  };
+  CFieldTree();
+  ~CFieldTree();
+  void SetField(const CFX_WideString& full_name, CPDF_FormField* field_ptr);
+  CPDF_FormField* GetField(const CFX_WideString& full_name);
+  CPDF_FormField* RemoveField(const CFX_WideString& full_name);
+  void RemoveAll();
+  _Node* FindNode(const CFX_WideString& full_name);
+  _Node* AddChild(_Node* pParent,
+                  const CFX_WideString& short_name,
+                  CPDF_FormField* field_ptr);
+  void RemoveNode(_Node* pNode, int nLevel = 0);
+  _Node* _Lookup(_Node* pParent, const CFX_WideString& short_name);
+  _Node m_Root;
+};
+CFieldTree::CFieldTree() {
+  m_Root.parent = NULL;
+  m_Root.field_ptr = NULL;
+}
+CFieldTree::~CFieldTree() {
+  RemoveAll();
+}
+CFieldTree::_Node* CFieldTree::AddChild(_Node* pParent,
+                                        const CFX_WideString& short_name,
+                                        CPDF_FormField* field_ptr) {
+  if (!pParent) {
+    return NULL;
+  }
+  _Node* pNode = new _Node;
+  pNode->parent = pParent;
+  pNode->short_name = short_name;
+  pNode->field_ptr = field_ptr;
+  pParent->children.Add(pNode);
+  return pNode;
+}
+void CFieldTree::RemoveNode(_Node* pNode, int nLevel) {
+  if (!pNode) {
+    return;
+  }
+  if (nLevel <= nMaxRecursion) {
+    for (int i = 0; i < pNode->children.GetSize(); i++) {
+      RemoveNode(pNode->children[i], nLevel + 1);
+    }
+  }
+  delete pNode;
+}
+CFieldTree::_Node* CFieldTree::_Lookup(_Node* pParent,
+                                       const CFX_WideString& short_name) {
+  if (!pParent) {
+    return NULL;
+  }
+  for (int i = 0; i < pParent->children.GetSize(); i++) {
+    _Node* pNode = pParent->children[i];
+    if (pNode->short_name.GetLength() == short_name.GetLength() &&
+        FXSYS_memcmp(pNode->short_name.c_str(), short_name.c_str(),
+                     short_name.GetLength() * sizeof(FX_WCHAR)) == 0) {
+      return pNode;
+    }
+  }
+  return NULL;
+}
+void CFieldTree::RemoveAll() {
+  for (int i = 0; i < m_Root.children.GetSize(); i++) {
+    RemoveNode(m_Root.children[i]);
+  }
+}
+void CFieldTree::SetField(const CFX_WideString& full_name,
+                          CPDF_FormField* field_ptr) {
+  if (full_name == L"") {
+    return;
+  }
+  CFieldNameExtractor name_extractor(full_name);
+  const FX_WCHAR* pName;
+  FX_STRSIZE nLength;
+  name_extractor.GetNext(pName, nLength);
+  _Node *pNode = &m_Root, *pLast = NULL;
+  while (nLength > 0) {
+    pLast = pNode;
+    CFX_WideString name = CFX_WideString(pName, nLength);
+    pNode = _Lookup(pLast, name);
+    if (!pNode) {
+      pNode = AddChild(pLast, name, NULL);
+    }
+    name_extractor.GetNext(pName, nLength);
+  }
+  if (pNode != &m_Root) {
+    pNode->field_ptr = field_ptr;
+  }
+}
+CPDF_FormField* CFieldTree::GetField(const CFX_WideString& full_name) {
+  if (full_name == L"") {
+    return NULL;
+  }
+  CFieldNameExtractor name_extractor(full_name);
+  const FX_WCHAR* pName;
+  FX_STRSIZE nLength;
+  name_extractor.GetNext(pName, nLength);
+  _Node *pNode = &m_Root, *pLast = NULL;
+  while (nLength > 0 && pNode) {
+    pLast = pNode;
+    CFX_WideString name = CFX_WideString(pName, nLength);
+    pNode = _Lookup(pLast, name);
+    name_extractor.GetNext(pName, nLength);
+  }
+  return pNode ? pNode->field_ptr : NULL;
+}
+CPDF_FormField* CFieldTree::RemoveField(const CFX_WideString& full_name) {
+  if (full_name == L"") {
+    return NULL;
+  }
+  CFieldNameExtractor name_extractor(full_name);
+  const FX_WCHAR* pName;
+  FX_STRSIZE nLength;
+  name_extractor.GetNext(pName, nLength);
+  _Node *pNode = &m_Root, *pLast = NULL;
+  while (nLength > 0 && pNode) {
+    pLast = pNode;
+    CFX_WideString name = CFX_WideString(pName, nLength);
+    pNode = _Lookup(pLast, name);
+    name_extractor.GetNext(pName, nLength);
+  }
+  if (pNode && pNode != &m_Root) {
+    for (int i = 0; i < pLast->children.GetSize(); i++) {
+      if (pNode == pLast->children[i]) {
+        pLast->children.RemoveAt(i);
+        break;
+      }
+    }
+    CPDF_FormField* pField = pNode->field_ptr;
+    RemoveNode(pNode);
+    return pField;
+  }
+  return NULL;
+}
+CFieldTree::_Node* CFieldTree::FindNode(const CFX_WideString& full_name) {
+  if (full_name == L"") {
+    return NULL;
+  }
+  CFieldNameExtractor name_extractor(full_name);
+  const FX_WCHAR* pName;
+  FX_STRSIZE nLength;
+  name_extractor.GetNext(pName, nLength);
+  _Node *pNode = &m_Root, *pLast = NULL;
+  while (nLength > 0 && pNode) {
+    pLast = pNode;
+    CFX_WideString name = CFX_WideString(pName, nLength);
+    pNode = _Lookup(pLast, name);
+    name_extractor.GetNext(pName, nLength);
+  }
+  return pNode;
+}
+CPDF_InterForm::CPDF_InterForm(CPDF_Document* pDocument, FX_BOOL bGenerateAP)
+    : CFX_PrivateData(),
+      m_pDocument(pDocument),
+      m_bGenerateAP(bGenerateAP),
+      m_pFormDict(nullptr),
+      m_pFieldTree(new CFieldTree),
+      m_pFormNotify(nullptr),
+      m_bUpdated(FALSE) {
+  CPDF_Dictionary* pRoot = m_pDocument->GetRoot();
+  if (!pRoot)
+    return;
+
+  m_pFormDict = pRoot->GetDictBy("AcroForm");
+  if (!m_pFormDict)
+    return;
+
+  CPDF_Array* pFields = m_pFormDict->GetArrayBy("Fields");
+  if (!pFields)
+    return;
+
+  int count = pFields->GetCount();
+  for (int i = 0; i < count; i++) {
+    LoadField(pFields->GetDictAt(i));
+  }
+}
+
+CPDF_InterForm::~CPDF_InterForm() {
+  for (auto it : m_ControlMap)
+    delete it.second;
+
+  int nCount = m_pFieldTree->m_Root.CountFields();
+  for (int i = 0; i < nCount; ++i) {
+    delete m_pFieldTree->m_Root.GetField(i);
+  }
+}
+
+FX_BOOL CPDF_InterForm::m_bUpdateAP = TRUE;
+FX_BOOL CPDF_InterForm::UpdatingAPEnabled() {
+  return m_bUpdateAP;
+}
+void CPDF_InterForm::EnableUpdateAP(FX_BOOL bUpdateAP) {
+  m_bUpdateAP = bUpdateAP;
+}
+CFX_ByteString CPDF_InterForm::GenerateNewResourceName(
+    const CPDF_Dictionary* pResDict,
+    const FX_CHAR* csType,
+    int iMinLen,
+    const FX_CHAR* csPrefix) {
+  CFX_ByteString csStr = csPrefix;
+  CFX_ByteString csBType = csType;
+  if (csStr.IsEmpty()) {
+    if (csBType == "ExtGState") {
+      csStr = "GS";
+    } else if (csBType == "ColorSpace") {
+      csStr = "CS";
+    } else if (csBType == "Font") {
+      csStr = "ZiTi";
+    } else {
+      csStr = "Res";
+    }
+  }
+  CFX_ByteString csTmp = csStr;
+  int iCount = csStr.GetLength();
+  int m = 0;
+  if (iMinLen > 0) {
+    csTmp = "";
+    while (m < iMinLen && m < iCount) {
+      csTmp += csStr[m++];
+    }
+    while (m < iMinLen) {
+      csTmp += '0' + m % 10;
+      m++;
+    }
+  } else {
+    m = iCount;
+  }
+  if (!pResDict) {
+    return csTmp;
+  }
+  CPDF_Dictionary* pDict = pResDict->GetDictBy(csType);
+  if (!pDict) {
+    return csTmp;
+  }
+  int num = 0;
+  CFX_ByteString bsNum;
+  while (TRUE) {
+    if (!pDict->KeyExist(csTmp + bsNum)) {
+      return csTmp + bsNum;
+    }
+    if (m < iCount) {
+      csTmp += csStr[m++];
+    } else {
+      bsNum.Format("%d", num++);
+    }
+    m++;
+  }
+  return csTmp;
+}
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+typedef struct PDF_FONTDATA_ {
+  FX_BOOL bFind;
+  LOGFONTA lf;
+} PDF_FONTDATA, FAR* LPDF_FONTDATA;
+static int CALLBACK EnumFontFamExProc(ENUMLOGFONTEXA* lpelfe,
+                                      NEWTEXTMETRICEX* lpntme,
+                                      DWORD FontType,
+                                      LPARAM lParam) {
+  if (FontType != 0x004 || strchr(lpelfe->elfLogFont.lfFaceName, '@')) {
+    return 1;
+  }
+  LPDF_FONTDATA pData = (LPDF_FONTDATA)lParam;
+  memcpy(&pData->lf, &lpelfe->elfLogFont, sizeof(LOGFONTA));
+  pData->bFind = TRUE;
+  return 0;
+}
+static FX_BOOL RetrieveSpecificFont(LOGFONTA& lf) {
+  PDF_FONTDATA fd;
+  memset(&fd, 0, sizeof(PDF_FONTDATA));
+  HDC hDC = ::GetDC(NULL);
+  EnumFontFamiliesExA(hDC, &lf, (FONTENUMPROCA)EnumFontFamExProc, (LPARAM)&fd,
+                      0);
+  ::ReleaseDC(NULL, hDC);
+  if (fd.bFind) {
+    memcpy(&lf, &fd.lf, sizeof(LOGFONTA));
+  }
+  return fd.bFind;
+}
+static FX_BOOL RetrieveSpecificFont(uint8_t charSet,
+                                    uint8_t pitchAndFamily,
+                                    LPCSTR pcsFontName,
+                                    LOGFONTA& lf) {
+  memset(&lf, 0, sizeof(LOGFONTA));
+  lf.lfCharSet = charSet;
+  lf.lfPitchAndFamily = pitchAndFamily;
+  if (pcsFontName) {
+    // TODO(dsinclair): Should this be strncpy?
+    strcpy(lf.lfFaceName, pcsFontName);
+  }
+  return RetrieveSpecificFont(lf);
+}
+#endif  // _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+
+CPDF_Font* CPDF_InterForm::AddStandardFont(CPDF_Document* pDocument,
+                                           CFX_ByteString csFontName) {
+  if (!pDocument || csFontName.IsEmpty())
+    return nullptr;
+
+  if (csFontName == "ZapfDingbats")
+    return pDocument->AddStandardFont(csFontName.c_str(), nullptr);
+
+  CPDF_FontEncoding encoding(PDFFONT_ENCODING_WINANSI);
+  return pDocument->AddStandardFont(csFontName.c_str(), &encoding);
+}
+
+CFX_ByteString CPDF_InterForm::GetNativeFont(uint8_t charSet, void* pLogFont) {
+  CFX_ByteString csFontName;
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+  LOGFONTA lf;
+  FX_BOOL bRet;
+  if (charSet == ANSI_CHARSET) {
+    csFontName = "Helvetica";
+    return csFontName;
+  }
+  bRet = FALSE;
+  if (charSet == SHIFTJIS_CHARSET) {
+    bRet = RetrieveSpecificFont(charSet, DEFAULT_PITCH | FF_DONTCARE,
+                                "MS Mincho", lf);
+  } else if (charSet == GB2312_CHARSET) {
+    bRet = RetrieveSpecificFont(charSet, DEFAULT_PITCH | FF_DONTCARE, "SimSun",
+                                lf);
+  } else if (charSet == CHINESEBIG5_CHARSET) {
+    bRet = RetrieveSpecificFont(charSet, DEFAULT_PITCH | FF_DONTCARE, "MingLiU",
+                                lf);
+  }
+  if (!bRet) {
+    bRet = RetrieveSpecificFont(charSet, DEFAULT_PITCH | FF_DONTCARE,
+                                "Arial Unicode MS", lf);
+  }
+  if (!bRet) {
+    bRet = RetrieveSpecificFont(charSet, DEFAULT_PITCH | FF_DONTCARE,
+                                "Microsoft Sans Serif", lf);
+  }
+  if (!bRet) {
+    bRet = RetrieveSpecificFont(charSet, DEFAULT_PITCH | FF_DONTCARE, NULL, lf);
+  }
+  if (bRet) {
+    if (pLogFont) {
+      memcpy(pLogFont, &lf, sizeof(LOGFONTA));
+    }
+    csFontName = lf.lfFaceName;
+    return csFontName;
+  }
+#endif
+  return csFontName;
+}
+CFX_ByteString CPDF_InterForm::GetNativeFont(void* pLogFont) {
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+  uint8_t charSet = GetNativeCharSet();
+  return GetNativeFont(charSet, pLogFont);
+#else
+  return CFX_ByteString();
+#endif
+}
+uint8_t CPDF_InterForm::GetNativeCharSet() {
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+  uint8_t charSet = ANSI_CHARSET;
+  UINT iCodePage = ::GetACP();
+  switch (iCodePage) {
+    case 932:
+      charSet = SHIFTJIS_CHARSET;
+      break;
+    case 936:
+      charSet = GB2312_CHARSET;
+      break;
+    case 950:
+      charSet = CHINESEBIG5_CHARSET;
+      break;
+    case 1252:
+      charSet = ANSI_CHARSET;
+      break;
+    case 874:
+      charSet = THAI_CHARSET;
+      break;
+    case 949:
+      charSet = HANGUL_CHARSET;
+      break;
+    case 1200:
+      charSet = ANSI_CHARSET;
+      break;
+    case 1250:
+      charSet = EASTEUROPE_CHARSET;
+      break;
+    case 1251:
+      charSet = RUSSIAN_CHARSET;
+      break;
+    case 1253:
+      charSet = GREEK_CHARSET;
+      break;
+    case 1254:
+      charSet = TURKISH_CHARSET;
+      break;
+    case 1255:
+      charSet = HEBREW_CHARSET;
+      break;
+    case 1256:
+      charSet = ARABIC_CHARSET;
+      break;
+    case 1257:
+      charSet = BALTIC_CHARSET;
+      break;
+    case 1258:
+      charSet = VIETNAMESE_CHARSET;
+      break;
+    case 1361:
+      charSet = JOHAB_CHARSET;
+      break;
+  }
+  return charSet;
+#else
+  return 0;
+#endif
+}
+
+CPDF_Font* CPDF_InterForm::AddNativeFont(uint8_t charSet,
+                                         CPDF_Document* pDocument) {
+  if (!pDocument)
+    return nullptr;
+
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+  LOGFONTA lf;
+  CFX_ByteString csFontName = GetNativeFont(charSet, &lf);
+  if (!csFontName.IsEmpty()) {
+    if (csFontName == "Helvetica")
+      return AddStandardFont(pDocument, csFontName);
+    return pDocument->AddWindowsFont(&lf, FALSE, TRUE);
+  }
+#endif
+  return nullptr;
+}
+
+CPDF_Font* CPDF_InterForm::AddNativeFont(CPDF_Document* pDocument) {
+  return pDocument ? AddNativeFont(GetNativeCharSet(), pDocument) : nullptr;
+}
+
+FX_BOOL CPDF_InterForm::ValidateFieldName(
+    CFX_WideString& csNewFieldName,
+    int iType,
+    const CPDF_FormField* pExcludedField,
+    const CPDF_FormControl* pExcludedControl) {
+  if (csNewFieldName.IsEmpty()) {
+    return FALSE;
+  }
+  int iPos = 0;
+  int iLength = csNewFieldName.GetLength();
+  CFX_WideString csSub;
+  while (TRUE) {
+    while (iPos < iLength &&
+           (csNewFieldName[iPos] == L'.' || csNewFieldName[iPos] == L' ')) {
+      iPos++;
+    }
+    if (iPos < iLength && !csSub.IsEmpty()) {
+      csSub += L'.';
+    }
+    while (iPos < iLength && csNewFieldName[iPos] != L'.') {
+      csSub += csNewFieldName[iPos++];
+    }
+    for (int i = csSub.GetLength() - 1; i > -1; i--) {
+      if (csSub[i] == L' ' || csSub[i] == L'.') {
+        csSub.SetAt(i, L'\0');
+      } else {
+        break;
+      }
+    }
+    FX_DWORD dwCount = m_pFieldTree->m_Root.CountFields();
+    for (FX_DWORD m = 0; m < dwCount; m++) {
+      CPDF_FormField* pField = m_pFieldTree->m_Root.GetField(m);
+      if (!pField) {
+        continue;
+      }
+      if (pField == pExcludedField) {
+        if (pExcludedControl) {
+          if (pField->CountControls() < 2) {
+            continue;
+          }
+        } else {
+          continue;
+        }
+      }
+      CFX_WideString csFullName = pField->GetFullName();
+      int iRet = CompareFieldName(csSub, csFullName);
+      if (iRet == 1) {
+        if (pField->GetFieldType() != iType) {
+          return FALSE;
+        }
+      } else if (iRet == 2 && csSub == csNewFieldName) {
+        if (csFullName[iPos] == L'.') {
+          return FALSE;
+        }
+      } else if (iRet == 3 && csSub == csNewFieldName) {
+        if (csNewFieldName[csFullName.GetLength()] == L'.') {
+          return FALSE;
+        }
+      }
+    }
+    if (iPos >= iLength) {
+      break;
+    }
+  }
+  if (csSub.IsEmpty()) {
+    return FALSE;
+  }
+  csNewFieldName = csSub;
+  return TRUE;
+}
+FX_BOOL CPDF_InterForm::ValidateFieldName(CFX_WideString& csNewFieldName,
+                                          int iType) {
+  return ValidateFieldName(csNewFieldName, iType, NULL, NULL);
+}
+FX_BOOL CPDF_InterForm::ValidateFieldName(const CPDF_FormField* pField,
+                                          CFX_WideString& csNewFieldName) {
+  return pField && !csNewFieldName.IsEmpty() &&
+         ValidateFieldName(csNewFieldName,
+                           ((CPDF_FormField*)pField)->GetFieldType(), pField,
+                           NULL);
+}
+FX_BOOL CPDF_InterForm::ValidateFieldName(const CPDF_FormControl* pControl,
+                                          CFX_WideString& csNewFieldName) {
+  if (!pControl || csNewFieldName.IsEmpty()) {
+    return FALSE;
+  }
+  CPDF_FormField* pField = ((CPDF_FormControl*)pControl)->GetField();
+  return ValidateFieldName(csNewFieldName, pField->GetFieldType(), pField,
+                           pControl);
+}
+int CPDF_InterForm::CompareFieldName(const CFX_ByteString& name1,
+                                     const CFX_ByteString& name2) {
+  const FX_CHAR* ptr1 = name1;
+  const FX_CHAR* ptr2 = name2;
+  if (name1.GetLength() == name2.GetLength()) {
+    return name1 == name2 ? 1 : 0;
+  }
+  int i = 0;
+  while (ptr1[i] == ptr2[i]) {
+    i++;
+  }
+  if (i == name1.GetLength()) {
+    return 2;
+  }
+  if (i == name2.GetLength()) {
+    return 3;
+  }
+  return 0;
+}
+int CPDF_InterForm::CompareFieldName(const CFX_WideString& name1,
+                                     const CFX_WideString& name2) {
+  const FX_WCHAR* ptr1 = name1.c_str();
+  const FX_WCHAR* ptr2 = name2.c_str();
+  if (name1.GetLength() == name2.GetLength()) {
+    return name1 == name2 ? 1 : 0;
+  }
+  int i = 0;
+  while (ptr1[i] == ptr2[i]) {
+    i++;
+  }
+  if (i == name1.GetLength()) {
+    return 2;
+  }
+  if (i == name2.GetLength()) {
+    return 3;
+  }
+  return 0;
+}
+FX_DWORD CPDF_InterForm::CountFields(const CFX_WideString& csFieldName) {
+  if (csFieldName.IsEmpty()) {
+    return (FX_DWORD)m_pFieldTree->m_Root.CountFields();
+  }
+  CFieldTree::_Node* pNode = m_pFieldTree->FindNode(csFieldName);
+  return pNode ? pNode->CountFields() : 0;
+}
+CPDF_FormField* CPDF_InterForm::GetField(FX_DWORD index,
+                                         const CFX_WideString& csFieldName) {
+  if (csFieldName == L"") {
+    return m_pFieldTree->m_Root.GetField(index);
+  }
+  CFieldTree::_Node* pNode = m_pFieldTree->FindNode(csFieldName);
+  return pNode ? pNode->GetField(index) : nullptr;
+}
+
+CPDF_FormField* CPDF_InterForm::GetFieldByDict(
+    CPDF_Dictionary* pFieldDict) const {
+  if (!pFieldDict) {
+    return NULL;
+  }
+  CFX_WideString csWName = GetFullName(pFieldDict);
+  return m_pFieldTree->GetField(csWName);
+}
+
+CPDF_FormControl* CPDF_InterForm::GetControlAtPoint(CPDF_Page* pPage,
+                                                    FX_FLOAT pdf_x,
+                                                    FX_FLOAT pdf_y,
+                                                    int* z_order) const {
+  CPDF_Array* pAnnotList = pPage->m_pFormDict->GetArrayBy("Annots");
+  if (!pAnnotList)
+    return nullptr;
+
+  for (FX_DWORD i = pAnnotList->GetCount(); i > 0; --i) {
+    FX_DWORD annot_index = i - 1;
+    CPDF_Dictionary* pAnnot = pAnnotList->GetDictAt(annot_index);
+    if (!pAnnot)
+      continue;
+
+    const auto it = m_ControlMap.find(pAnnot);
+    if (it == m_ControlMap.end())
+      continue;
+
+    CPDF_FormControl* pControl = it->second;
+    CFX_FloatRect rect = pControl->GetRect();
+    if (!rect.Contains(pdf_x, pdf_y))
+      continue;
+
+    if (z_order)
+      *z_order = annot_index;
+    return pControl;
+  }
+  return nullptr;
+}
+
+CPDF_FormControl* CPDF_InterForm::GetControlByDict(
+    const CPDF_Dictionary* pWidgetDict) const {
+  const auto it = m_ControlMap.find(pWidgetDict);
+  return it != m_ControlMap.end() ? it->second : nullptr;
+}
+
+FX_BOOL CPDF_InterForm::NeedConstructAP() {
+  return m_pFormDict && m_pFormDict->GetBooleanBy("NeedAppearances");
+}
+void CPDF_InterForm::NeedConstructAP(FX_BOOL bNeedAP) {
+  if (!m_pFormDict) {
+    InitInterFormDict(m_pFormDict, m_pDocument);
+  }
+  m_pFormDict->SetAtBoolean("NeedAppearances", bNeedAP);
+  m_bGenerateAP = bNeedAP;
+}
+int CPDF_InterForm::CountFieldsInCalculationOrder() {
+  if (!m_pFormDict) {
+    return 0;
+  }
+  CPDF_Array* pArray = m_pFormDict->GetArrayBy("CO");
+  return pArray ? pArray->GetCount() : 0;
+}
+CPDF_FormField* CPDF_InterForm::GetFieldInCalculationOrder(int index) {
+  if (!m_pFormDict || index < 0) {
+    return NULL;
+  }
+  CPDF_Array* pArray = m_pFormDict->GetArrayBy("CO");
+  if (!pArray) {
+    return NULL;
+  }
+  if (CPDF_Dictionary* pElement =
+          ToDictionary(pArray->GetElementValue(index))) {
+    return GetFieldByDict(pElement);
+  }
+  return NULL;
+}
+int CPDF_InterForm::FindFieldInCalculationOrder(const CPDF_FormField* pField) {
+  if (!m_pFormDict || !pField) {
+    return -1;
+  }
+  CPDF_Array* pArray = m_pFormDict->GetArrayBy("CO");
+  if (!pArray) {
+    return -1;
+  }
+  for (FX_DWORD i = 0; i < pArray->GetCount(); i++) {
+    CPDF_Object* pElement = pArray->GetElementValue(i);
+    if (pElement == pField->m_pDict) {
+      return i;
+    }
+  }
+  return -1;
+}
+FX_DWORD CPDF_InterForm::CountFormFonts() {
+  return CountInterFormFonts(m_pFormDict);
+}
+CPDF_Font* CPDF_InterForm::GetFormFont(FX_DWORD index,
+                                       CFX_ByteString& csNameTag) {
+  return GetInterFormFont(m_pFormDict, m_pDocument, index, csNameTag);
+}
+CPDF_Font* CPDF_InterForm::GetFormFont(CFX_ByteString csNameTag) {
+  return GetInterFormFont(m_pFormDict, m_pDocument, csNameTag);
+}
+CPDF_Font* CPDF_InterForm::GetFormFont(CFX_ByteString csFontName,
+                                       CFX_ByteString& csNameTag) {
+  return GetInterFormFont(m_pFormDict, m_pDocument, csFontName, csNameTag);
+}
+CPDF_Font* CPDF_InterForm::GetNativeFormFont(uint8_t charSet,
+                                             CFX_ByteString& csNameTag) {
+  return GetNativeInterFormFont(m_pFormDict, m_pDocument, charSet, csNameTag);
+}
+CPDF_Font* CPDF_InterForm::GetNativeFormFont(CFX_ByteString& csNameTag) {
+  return GetNativeInterFormFont(m_pFormDict, m_pDocument, csNameTag);
+}
+FX_BOOL CPDF_InterForm::FindFormFont(const CPDF_Font* pFont,
+                                     CFX_ByteString& csNameTag) {
+  return FindInterFormFont(m_pFormDict, pFont, csNameTag);
+}
+FX_BOOL CPDF_InterForm::FindFormFont(CFX_ByteString csFontName,
+                                     CPDF_Font*& pFont,
+                                     CFX_ByteString& csNameTag) {
+  return FindInterFormFont(m_pFormDict, m_pDocument, csFontName, pFont,
+                           csNameTag);
+}
+void CPDF_InterForm::AddFormFont(const CPDF_Font* pFont,
+                                 CFX_ByteString& csNameTag) {
+  AddInterFormFont(m_pFormDict, m_pDocument, pFont, csNameTag);
+  m_bUpdated = TRUE;
+}
+CPDF_Font* CPDF_InterForm::AddNativeFormFont(uint8_t charSet,
+                                             CFX_ByteString& csNameTag) {
+  m_bUpdated = TRUE;
+  return AddNativeInterFormFont(m_pFormDict, m_pDocument, charSet, csNameTag);
+}
+CPDF_Font* CPDF_InterForm::AddNativeFormFont(CFX_ByteString& csNameTag) {
+  m_bUpdated = TRUE;
+  return AddNativeInterFormFont(m_pFormDict, m_pDocument, csNameTag);
+}
+void CPDF_InterForm::RemoveFormFont(const CPDF_Font* pFont) {
+  m_bUpdated = TRUE;
+  RemoveInterFormFont(m_pFormDict, pFont);
+}
+void CPDF_InterForm::RemoveFormFont(CFX_ByteString csNameTag) {
+  m_bUpdated = TRUE;
+  RemoveInterFormFont(m_pFormDict, csNameTag);
+}
+
+CPDF_DefaultAppearance CPDF_InterForm::GetDefaultAppearance() {
+  if (!m_pFormDict)
+    return CPDF_DefaultAppearance();
+  return CPDF_DefaultAppearance(m_pFormDict->GetStringBy("DA"));
+}
+
+CPDF_Font* CPDF_InterForm::GetDefaultFormFont() {
+  return GetDefaultInterFormFont(m_pFormDict, m_pDocument);
+}
+int CPDF_InterForm::GetFormAlignment() {
+  return m_pFormDict ? m_pFormDict->GetIntegerBy("Q", 0) : 0;
+}
+
+bool CPDF_InterForm::ResetForm(const std::vector<CPDF_FormField*>& fields,
+                               bool bIncludeOrExclude,
+                               bool bNotify) {
+  if (bNotify && m_pFormNotify && m_pFormNotify->BeforeFormReset(this) < 0)
+    return false;
+
+  int nCount = m_pFieldTree->m_Root.CountFields();
+  for (int i = 0; i < nCount; ++i) {
+    CPDF_FormField* pField = m_pFieldTree->m_Root.GetField(i);
+    if (!pField)
+      continue;
+
+    if (bIncludeOrExclude == pdfium::ContainsValue(fields, pField))
+      pField->ResetField(bNotify);
+  }
+  if (bNotify && m_pFormNotify)
+    m_pFormNotify->AfterFormReset(this);
+  return true;
+}
+
+bool CPDF_InterForm::ResetForm(bool bNotify) {
+  if (bNotify && m_pFormNotify && m_pFormNotify->BeforeFormReset(this) < 0)
+    return false;
+
+  int nCount = m_pFieldTree->m_Root.CountFields();
+  for (int i = 0; i < nCount; ++i) {
+    CPDF_FormField* pField = m_pFieldTree->m_Root.GetField(i);
+    if (!pField)
+      continue;
+
+    pField->ResetField(bNotify);
+  }
+  if (bNotify && m_pFormNotify)
+    m_pFormNotify->AfterFormReset(this);
+  return true;
+}
+
+void CPDF_InterForm::LoadField(CPDF_Dictionary* pFieldDict, int nLevel) {
+  if (nLevel > nMaxRecursion) {
+    return;
+  }
+  if (!pFieldDict) {
+    return;
+  }
+  FX_DWORD dwParentObjNum = pFieldDict->GetObjNum();
+  CPDF_Array* pKids = pFieldDict->GetArrayBy("Kids");
+  if (!pKids) {
+    AddTerminalField(pFieldDict);
+    return;
+  }
+  CPDF_Dictionary* pFirstKid = pKids->GetDictAt(0);
+  if (!pFirstKid) {
+    return;
+  }
+  if (pFirstKid->KeyExist("T") || pFirstKid->KeyExist("Kids")) {
+    for (FX_DWORD i = 0; i < pKids->GetCount(); i++) {
+      CPDF_Dictionary* pChildDict = pKids->GetDictAt(i);
+      if (pChildDict) {
+        if (pChildDict->GetObjNum() != dwParentObjNum) {
+          LoadField(pChildDict, nLevel + 1);
+        }
+      }
+    }
+  } else {
+    AddTerminalField(pFieldDict);
+  }
+}
+FX_BOOL CPDF_InterForm::HasXFAForm() const {
+  return m_pFormDict && m_pFormDict->GetArrayBy("XFA");
+}
+void CPDF_InterForm::FixPageFields(const CPDF_Page* pPage) {
+  CPDF_Dictionary* pPageDict = pPage->m_pFormDict;
+  if (!pPageDict) {
+    return;
+  }
+  CPDF_Array* pAnnots = pPageDict->GetArrayBy("Annots");
+  if (!pAnnots) {
+    return;
+  }
+  int iAnnotCount = pAnnots->GetCount();
+  for (int i = 0; i < iAnnotCount; i++) {
+    CPDF_Dictionary* pAnnot = pAnnots->GetDictAt(i);
+    if (pAnnot && pAnnot->GetStringBy("Subtype") == "Widget") {
+      LoadField(pAnnot);
+    }
+  }
+}
+CPDF_FormField* CPDF_InterForm::AddTerminalField(CPDF_Dictionary* pFieldDict) {
+  if (!pFieldDict->KeyExist("T")) {
+    return NULL;
+  }
+  CPDF_Dictionary* pDict = pFieldDict;
+  CFX_WideString csWName = GetFullName(pFieldDict);
+  if (csWName.IsEmpty()) {
+    return NULL;
+  }
+  CPDF_FormField* pField = NULL;
+  pField = m_pFieldTree->GetField(csWName);
+  if (!pField) {
+    CPDF_Dictionary* pParent = pFieldDict;
+    if (!pFieldDict->KeyExist("T") &&
+        pFieldDict->GetStringBy("Subtype") == "Widget") {
+      pParent = pFieldDict->GetDictBy("Parent");
+      if (!pParent) {
+        pParent = pFieldDict;
+      }
+    }
+    if (pParent && pParent != pFieldDict && !pParent->KeyExist("FT")) {
+      if (pFieldDict->KeyExist("FT")) {
+        CPDF_Object* pFTValue = pFieldDict->GetElementValue("FT");
+        if (pFTValue) {
+          pParent->SetAt("FT", pFTValue->Clone());
+        }
+      }
+      if (pFieldDict->KeyExist("Ff")) {
+        CPDF_Object* pFfValue = pFieldDict->GetElementValue("Ff");
+        if (pFfValue) {
+          pParent->SetAt("Ff", pFfValue->Clone());
+        }
+      }
+    }
+    pField = new CPDF_FormField(this, pParent);
+    CPDF_Object* pTObj = pDict->GetElement("T");
+    if (ToReference(pTObj)) {
+      CPDF_Object* pClone = pTObj->Clone(TRUE);
+      if (pClone)
+        pDict->SetAt("T", pClone);
+      else
+        pDict->SetAtName("T", "");
+    }
+    m_pFieldTree->SetField(csWName, pField);
+  }
+  CPDF_Array* pKids = pFieldDict->GetArrayBy("Kids");
+  if (!pKids) {
+    if (pFieldDict->GetStringBy("Subtype") == "Widget") {
+      AddControl(pField, pFieldDict);
+    }
+  } else {
+    for (FX_DWORD i = 0; i < pKids->GetCount(); i++) {
+      CPDF_Dictionary* pKid = pKids->GetDictAt(i);
+      if (!pKid) {
+        continue;
+      }
+      if (pKid->GetStringBy("Subtype") != "Widget") {
+        continue;
+      }
+      AddControl(pField, pKid);
+    }
+  }
+  return pField;
+}
+CPDF_FormControl* CPDF_InterForm::AddControl(const CPDF_FormField* pField,
+                                             CPDF_Dictionary* pWidgetDict) {
+  const auto it = m_ControlMap.find(pWidgetDict);
+  if (it != m_ControlMap.end())
+    return it->second;
+
+  CPDF_FormControl* pControl =
+      new CPDF_FormControl((CPDF_FormField*)pField, pWidgetDict);
+  m_ControlMap[pWidgetDict] = pControl;
+  ((CPDF_FormField*)pField)->m_ControlList.Add(pControl);
+  return pControl;
+}
+
+CPDF_FormField* CPDF_InterForm::CheckRequiredFields(
+    const std::vector<CPDF_FormField*>* fields,
+    bool bIncludeOrExclude) const {
+  int nCount = m_pFieldTree->m_Root.CountFields();
+  for (int i = 0; i < nCount; ++i) {
+    CPDF_FormField* pField = m_pFieldTree->m_Root.GetField(i);
+    if (!pField)
+      continue;
+
+    int32_t iType = pField->GetType();
+    if (iType == CPDF_FormField::PushButton ||
+        iType == CPDF_FormField::CheckBox || iType == CPDF_FormField::ListBox) {
+      continue;
+    }
+    FX_DWORD dwFlags = pField->GetFieldFlags();
+    // TODO(thestig): Look up these magic numbers and add constants for them.
+    if (dwFlags & 0x04)
+      continue;
+
+    bool bFind = true;
+    if (fields)
+      bFind = pdfium::ContainsValue(*fields, pField);
+    if (bIncludeOrExclude == bFind) {
+      CPDF_Dictionary* pFieldDict = pField->m_pDict;
+      if ((dwFlags & 0x02) != 0 && pFieldDict->GetStringBy("V").IsEmpty()) {
+        return pField;
+      }
+    }
+  }
+  return nullptr;
+}
+
+CFDF_Document* CPDF_InterForm::ExportToFDF(const CFX_WideStringC& pdf_path,
+                                           bool bSimpleFileSpec) const {
+  std::vector<CPDF_FormField*> fields;
+  int nCount = m_pFieldTree->m_Root.CountFields();
+  for (int i = 0; i < nCount; ++i)
+    fields.push_back(m_pFieldTree->m_Root.GetField(i));
+  return ExportToFDF(pdf_path, fields, true, bSimpleFileSpec);
+}
+
+CFDF_Document* CPDF_InterForm::ExportToFDF(
+    const CFX_WideStringC& pdf_path,
+    const std::vector<CPDF_FormField*>& fields,
+    bool bIncludeOrExclude,
+    bool bSimpleFileSpec) const {
+  CFDF_Document* pDoc = CFDF_Document::CreateNewDoc();
+  if (!pDoc) {
+    return NULL;
+  }
+  CPDF_Dictionary* pMainDict = pDoc->GetRoot()->GetDictBy("FDF");
+  if (!pdf_path.IsEmpty()) {
+    if (bSimpleFileSpec) {
+      CFX_WideString wsFilePath = CPDF_FileSpec::EncodeFileName(pdf_path);
+      pMainDict->SetAtString("F", CFX_ByteString::FromUnicode(wsFilePath));
+      pMainDict->SetAtString("UF", PDF_EncodeText(wsFilePath));
+    } else {
+      CPDF_FileSpec filespec;
+      filespec.SetFileName(pdf_path);
+      pMainDict->SetAt("F", filespec.GetObj());
+    }
+  }
+  CPDF_Array* pFields = new CPDF_Array;
+  pMainDict->SetAt("Fields", pFields);
+  int nCount = m_pFieldTree->m_Root.CountFields();
+  for (int i = 0; i < nCount; i++) {
+    CPDF_FormField* pField = m_pFieldTree->m_Root.GetField(i);
+    if (!pField || pField->GetType() == CPDF_FormField::PushButton) {
+      continue;
+    }
+    FX_DWORD dwFlags = pField->GetFieldFlags();
+    if (dwFlags & 0x04)
+      continue;
+
+    if (bIncludeOrExclude == pdfium::ContainsValue(fields, pField)) {
+      if ((dwFlags & 0x02) != 0 && pField->m_pDict->GetStringBy("V").IsEmpty())
+        continue;
+
+      CFX_WideString fullname = GetFullName(pField->GetFieldDict());
+      CPDF_Dictionary* pFieldDict = new CPDF_Dictionary;
+      pFieldDict->SetAt("T", new CPDF_String(fullname));
+      if (pField->GetType() == CPDF_FormField::CheckBox ||
+          pField->GetType() == CPDF_FormField::RadioButton) {
+        CFX_WideString csExport = pField->GetCheckValue(FALSE);
+        CFX_ByteString csBExport = PDF_EncodeText(csExport);
+        CPDF_Object* pOpt = FPDF_GetFieldAttr(pField->m_pDict, "Opt");
+        if (pOpt)
+          pFieldDict->SetAtString("V", csBExport);
+        else
+          pFieldDict->SetAtName("V", csBExport);
+      } else {
+        CPDF_Object* pV = FPDF_GetFieldAttr(pField->m_pDict, "V");
+        if (pV)
+          pFieldDict->SetAt("V", pV->Clone(TRUE));
+      }
+      pFields->Add(pFieldDict);
+    }
+  }
+  return pDoc;
+}
+
+void CPDF_InterForm::FDF_ImportField(CPDF_Dictionary* pFieldDict,
+                                     const CFX_WideString& parent_name,
+                                     FX_BOOL bNotify,
+                                     int nLevel) {
+  CFX_WideString name;
+  if (!parent_name.IsEmpty()) {
+    name = parent_name + L".";
+  }
+  name += pFieldDict->GetUnicodeTextBy("T");
+  CPDF_Array* pKids = pFieldDict->GetArrayBy("Kids");
+  if (pKids) {
+    for (FX_DWORD i = 0; i < pKids->GetCount(); i++) {
+      CPDF_Dictionary* pKid = pKids->GetDictAt(i);
+      if (!pKid) {
+        continue;
+      }
+      if (nLevel <= nMaxRecursion) {
+        FDF_ImportField(pKid, name, bNotify, nLevel + 1);
+      }
+    }
+    return;
+  }
+  if (!pFieldDict->KeyExist("V")) {
+    return;
+  }
+  CPDF_FormField* pField = m_pFieldTree->GetField(name);
+  if (!pField) {
+    return;
+  }
+  CFX_WideString csWValue =
+      FPDFDOC_FDF_GetFieldValue(*pFieldDict, m_bsEncoding);
+  int iType = pField->GetFieldType();
+  if (bNotify && m_pFormNotify) {
+    int iRet = 0;
+    if (iType == FIELDTYPE_LISTBOX) {
+      iRet = m_pFormNotify->BeforeSelectionChange(pField, csWValue);
+    } else if (iType == FIELDTYPE_COMBOBOX || iType == FIELDTYPE_TEXTFIELD) {
+      iRet = m_pFormNotify->BeforeValueChange(pField, csWValue);
+    }
+    if (iRet < 0) {
+      return;
+    }
+  }
+  pField->SetValue(csWValue);
+  CPDF_FormField::Type eType = pField->GetType();
+  if ((eType == CPDF_FormField::ListBox || eType == CPDF_FormField::ComboBox) &&
+      pFieldDict->KeyExist("Opt")) {
+    pField->m_pDict->SetAt("Opt",
+                           pFieldDict->GetElementValue("Opt")->Clone(TRUE));
+  }
+  if (bNotify && m_pFormNotify) {
+    if (iType == FIELDTYPE_CHECKBOX || iType == FIELDTYPE_RADIOBUTTON) {
+      m_pFormNotify->AfterCheckedStatusChange(pField);
+    } else if (iType == FIELDTYPE_LISTBOX) {
+      m_pFormNotify->AfterSelectionChange(pField);
+    } else if (iType == FIELDTYPE_COMBOBOX || iType == FIELDTYPE_TEXTFIELD) {
+      m_pFormNotify->AfterValueChange(pField);
+    }
+  }
+  if (CPDF_InterForm::m_bUpdateAP) {
+    pField->UpdateAP(NULL);
+  }
+}
+FX_BOOL CPDF_InterForm::ImportFromFDF(const CFDF_Document* pFDF,
+                                      FX_BOOL bNotify) {
+  if (!pFDF) {
+    return FALSE;
+  }
+  CPDF_Dictionary* pMainDict = pFDF->GetRoot()->GetDictBy("FDF");
+  if (!pMainDict) {
+    return FALSE;
+  }
+  CPDF_Array* pFields = pMainDict->GetArrayBy("Fields");
+  if (!pFields) {
+    return FALSE;
+  }
+  m_bsEncoding = pMainDict->GetStringBy("Encoding");
+  if (bNotify && m_pFormNotify) {
+    int iRet = m_pFormNotify->BeforeFormImportData(this);
+    if (iRet < 0) {
+      return FALSE;
+    }
+  }
+  for (FX_DWORD i = 0; i < pFields->GetCount(); i++) {
+    CPDF_Dictionary* pField = pFields->GetDictAt(i);
+    if (!pField) {
+      continue;
+    }
+    FDF_ImportField(pField, L"", bNotify);
+  }
+  if (bNotify && m_pFormNotify) {
+    m_pFormNotify->AfterFormImportData(this);
+  }
+  return TRUE;
+}
+void CPDF_InterForm::SetFormNotify(const CPDF_FormNotify* pNotify) {
+  m_pFormNotify = (CPDF_FormNotify*)pNotify;
+}
diff --git a/core/fpdfdoc/doc_formcontrol.cpp b/core/fpdfdoc/doc_formcontrol.cpp
new file mode 100644
index 0000000000..15ff7b5e64
--- /dev/null
+++ b/core/fpdfdoc/doc_formcontrol.cpp
@@ -0,0 +1,432 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include <algorithm>
+
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+
+CPDF_FormControl::CPDF_FormControl(CPDF_FormField* pField,
+                                   CPDF_Dictionary* pWidgetDict) {
+  m_pField = pField;
+  m_pWidgetDict = pWidgetDict;
+  m_pForm = m_pField->m_pForm;
+}
+CFX_FloatRect CPDF_FormControl::GetRect() const {
+  return m_pWidgetDict->GetRectBy("Rect");
+}
+CFX_ByteString CPDF_FormControl::GetOnStateName() const {
+  ASSERT(GetType() == CPDF_FormField::CheckBox ||
+         GetType() == CPDF_FormField::RadioButton);
+  CFX_ByteString csOn;
+  CPDF_Dictionary* pAP = m_pWidgetDict->GetDictBy("AP");
+  if (!pAP) {
+    return csOn;
+  }
+  CPDF_Dictionary* pN = pAP->GetDictBy("N");
+  if (!pN) {
+    return csOn;
+  }
+  for (const auto& it : *pN) {
+    if (it.first != "Off") {
+      return it.first;
+    }
+  }
+  return CFX_ByteString();
+}
+void CPDF_FormControl::SetOnStateName(const CFX_ByteString& csOn) {
+  ASSERT(GetType() == CPDF_FormField::CheckBox ||
+         GetType() == CPDF_FormField::RadioButton);
+  CFX_ByteString csValue = csOn;
+  if (csValue.IsEmpty()) {
+    csValue = "Yes";
+  }
+  if (csValue == "Off") {
+    csValue = "Yes";
+  }
+  CFX_ByteString csAS = m_pWidgetDict->GetStringBy("AS", "Off");
+  if (csAS != "Off") {
+    m_pWidgetDict->SetAtName("AS", csValue);
+  }
+  CPDF_Dictionary* pAP = m_pWidgetDict->GetDictBy("AP");
+  if (!pAP) {
+    return;
+  }
+  for (const auto& it : *pAP) {
+    CPDF_Object* pObj1 = it.second;
+    if (!pObj1) {
+      continue;
+    }
+    CPDF_Object* pObjDirect1 = pObj1->GetDirect();
+    CPDF_Dictionary* pSubDict = pObjDirect1->AsDictionary();
+    if (!pSubDict)
+      continue;
+
+    auto subdict_it = pSubDict->begin();
+    while (subdict_it != pSubDict->end()) {
+      const CFX_ByteString& csKey2 = subdict_it->first;
+      CPDF_Object* pObj2 = subdict_it->second;
+      ++subdict_it;
+      if (!pObj2) {
+        continue;
+      }
+      if (csKey2 != "Off") {
+        pSubDict->ReplaceKey(csKey2, csValue);
+        break;
+      }
+    }
+  }
+}
+CFX_ByteString CPDF_FormControl::GetCheckedAPState() {
+  ASSERT(GetType() == CPDF_FormField::CheckBox ||
+         GetType() == CPDF_FormField::RadioButton);
+  CFX_ByteString csOn = GetOnStateName();
+  if (GetType() == CPDF_FormField::RadioButton ||
+      GetType() == CPDF_FormField::CheckBox) {
+    if (ToArray(FPDF_GetFieldAttr(m_pField->m_pDict, "Opt"))) {
+      int iIndex = m_pField->GetControlIndex(this);
+      csOn.Format("%d", iIndex);
+    }
+  }
+  if (csOn.IsEmpty())
+    csOn = "Yes";
+  return csOn;
+}
+CFX_WideString CPDF_FormControl::GetExportValue() {
+  ASSERT(GetType() == CPDF_FormField::CheckBox ||
+         GetType() == CPDF_FormField::RadioButton);
+  CFX_ByteString csOn = GetOnStateName();
+  if (GetType() == CPDF_FormField::RadioButton ||
+      GetType() == CPDF_FormField::CheckBox) {
+    if (CPDF_Array* pArray =
+            ToArray(FPDF_GetFieldAttr(m_pField->m_pDict, "Opt"))) {
+      int iIndex = m_pField->GetControlIndex(this);
+      csOn = pArray->GetStringAt(iIndex);
+    }
+  }
+  if (csOn.IsEmpty()) {
+    csOn = "Yes";
+  }
+  CFX_WideString csWOn = PDF_DecodeText(csOn);
+  return csWOn;
+}
+
+bool CPDF_FormControl::IsChecked() const {
+  ASSERT(GetType() == CPDF_FormField::CheckBox ||
+         GetType() == CPDF_FormField::RadioButton);
+  CFX_ByteString csOn = GetOnStateName();
+  CFX_ByteString csAS = m_pWidgetDict->GetStringBy("AS");
+  return csAS == csOn;
+}
+
+bool CPDF_FormControl::IsDefaultChecked() const {
+  ASSERT(GetType() == CPDF_FormField::CheckBox ||
+         GetType() == CPDF_FormField::RadioButton);
+  CPDF_Object* pDV = FPDF_GetFieldAttr(m_pField->m_pDict, "DV");
+  if (!pDV) {
+    return FALSE;
+  }
+  CFX_ByteString csDV = pDV->GetString();
+  CFX_ByteString csOn = GetOnStateName();
+  return (csDV == csOn);
+}
+
+void CPDF_FormControl::CheckControl(FX_BOOL bChecked) {
+  ASSERT(GetType() == CPDF_FormField::CheckBox ||
+         GetType() == CPDF_FormField::RadioButton);
+  CFX_ByteString csOn = GetOnStateName();
+  CFX_ByteString csOldAS = m_pWidgetDict->GetStringBy("AS", "Off");
+  CFX_ByteString csAS = "Off";
+  if (bChecked) {
+    csAS = csOn;
+  }
+  if (csOldAS == csAS) {
+    return;
+  }
+  m_pWidgetDict->SetAtName("AS", csAS);
+  m_pForm->m_bUpdated = TRUE;
+}
+CPDF_Stream* FPDFDOC_GetAnnotAP(CPDF_Dictionary* pAnnotDict,
+                                CPDF_Annot::AppearanceMode mode);
+void CPDF_FormControl::DrawControl(CFX_RenderDevice* pDevice,
+                                   CFX_Matrix* pMatrix,
+                                   CPDF_Page* pPage,
+                                   CPDF_Annot::AppearanceMode mode,
+                                   const CPDF_RenderOptions* pOptions) {
+  if (m_pWidgetDict->GetIntegerBy("F") & ANNOTFLAG_HIDDEN) {
+    return;
+  }
+  CPDF_Stream* pStream = FPDFDOC_GetAnnotAP(m_pWidgetDict, mode);
+  if (!pStream) {
+    return;
+  }
+  CFX_FloatRect form_bbox = pStream->GetDict()->GetRectBy("BBox");
+  CFX_Matrix form_matrix = pStream->GetDict()->GetMatrixBy("Matrix");
+  form_matrix.TransformRect(form_bbox);
+  CFX_FloatRect arect = m_pWidgetDict->GetRectBy("Rect");
+  CFX_Matrix matrix;
+  matrix.MatchRect(arect, form_bbox);
+  matrix.Concat(*pMatrix);
+  CPDF_Form form(m_pField->m_pForm->m_pDocument,
+                 m_pField->m_pForm->m_pFormDict->GetDictBy("DR"), pStream);
+  form.ParseContent(NULL, NULL, NULL, NULL);
+  CPDF_RenderContext context(pPage);
+  context.AppendLayer(&form, &matrix);
+  context.Render(pDevice, pOptions, nullptr);
+}
+static const FX_CHAR* const g_sHighlightingMode[] = {
+    // Must match order of HiglightingMode enum.
+    "N", "I", "O", "P", "T", nullptr};
+CPDF_FormControl::HighlightingMode CPDF_FormControl::GetHighlightingMode() {
+  if (!m_pWidgetDict) {
+    return Invert;
+  }
+  CFX_ByteString csH = m_pWidgetDict->GetStringBy("H", "I");
+  for (int i = 0; g_sHighlightingMode[i]; ++i) {
+    if (csH.Equal(g_sHighlightingMode[i]))
+      return static_cast<HighlightingMode>(i);
+  }
+  return Invert;
+}
+
+CPDF_ApSettings CPDF_FormControl::GetMK() const {
+  return CPDF_ApSettings(m_pWidgetDict ? m_pWidgetDict->GetDictBy("MK")
+                                       : nullptr);
+}
+
+bool CPDF_FormControl::HasMKEntry(CFX_ByteString csEntry) const {
+  return GetMK().HasMKEntry(csEntry);
+}
+
+int CPDF_FormControl::GetRotation() {
+  return GetMK().GetRotation();
+}
+
+FX_ARGB CPDF_FormControl::GetColor(int& iColorType, CFX_ByteString csEntry) {
+  return GetMK().GetColor(iColorType, csEntry);
+}
+
+FX_FLOAT CPDF_FormControl::GetOriginalColor(int index, CFX_ByteString csEntry) {
+  return GetMK().GetOriginalColor(index, csEntry);
+}
+
+void CPDF_FormControl::GetOriginalColor(int& iColorType,
+                                        FX_FLOAT fc[4],
+                                        CFX_ByteString csEntry) {
+  GetMK().GetOriginalColor(iColorType, fc, csEntry);
+}
+CFX_WideString CPDF_FormControl::GetCaption(CFX_ByteString csEntry) {
+  return GetMK().GetCaption(csEntry);
+}
+
+CPDF_Stream* CPDF_FormControl::GetIcon(CFX_ByteString csEntry) {
+  return GetMK().GetIcon(csEntry);
+}
+
+CPDF_IconFit CPDF_FormControl::GetIconFit() {
+  return GetMK().GetIconFit();
+}
+
+int CPDF_FormControl::GetTextPosition() {
+  return GetMK().GetTextPosition();
+}
+
+CPDF_Action CPDF_FormControl::GetAction() {
+  if (!m_pWidgetDict) {
+    return CPDF_Action();
+  }
+  if (m_pWidgetDict->KeyExist("A")) {
+    return CPDF_Action(m_pWidgetDict->GetDictBy("A"));
+  }
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pField->m_pDict, "A");
+  if (!pObj) {
+    return CPDF_Action();
+  }
+  return CPDF_Action(pObj->GetDict());
+}
+
+CPDF_AAction CPDF_FormControl::GetAdditionalAction() {
+  if (!m_pWidgetDict)
+    return CPDF_AAction();
+
+  if (m_pWidgetDict->KeyExist("AA"))
+    return CPDF_AAction(m_pWidgetDict->GetDictBy("AA"));
+  return m_pField->GetAdditionalAction();
+}
+
+CPDF_DefaultAppearance CPDF_FormControl::GetDefaultAppearance() {
+  if (!m_pWidgetDict)
+    return CPDF_DefaultAppearance();
+
+  if (m_pWidgetDict->KeyExist("DA"))
+    return CPDF_DefaultAppearance(m_pWidgetDict->GetStringBy("DA"));
+
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pField->m_pDict, "DA");
+  if (pObj)
+    return CPDF_DefaultAppearance(pObj->GetString());
+  return m_pField->m_pForm->GetDefaultAppearance();
+}
+
+CPDF_Font* CPDF_FormControl::GetDefaultControlFont() {
+  CPDF_DefaultAppearance cDA = GetDefaultAppearance();
+  CFX_ByteString csFontNameTag;
+  FX_FLOAT fFontSize;
+  cDA.GetFont(csFontNameTag, fFontSize);
+  if (csFontNameTag.IsEmpty())
+    return nullptr;
+
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pWidgetDict, "DR");
+  if (CPDF_Dictionary* pDict = ToDictionary(pObj)) {
+    CPDF_Dictionary* pFonts = pDict->GetDictBy("Font");
+    if (pFonts) {
+      CPDF_Dictionary* pElement = pFonts->GetDictBy(csFontNameTag);
+      if (pElement) {
+        CPDF_Font* pFont = m_pField->m_pForm->m_pDocument->LoadFont(pElement);
+        if (pFont) {
+          return pFont;
+        }
+      }
+    }
+  }
+  if (CPDF_Font* pFormFont = m_pField->m_pForm->GetFormFont(csFontNameTag))
+    return pFormFont;
+
+  CPDF_Dictionary* pPageDict = m_pWidgetDict->GetDictBy("P");
+  pObj = FPDF_GetFieldAttr(pPageDict, "Resources");
+  if (CPDF_Dictionary* pDict = ToDictionary(pObj)) {
+    CPDF_Dictionary* pFonts = pDict->GetDictBy("Font");
+    if (pFonts) {
+      CPDF_Dictionary* pElement = pFonts->GetDictBy(csFontNameTag);
+      if (pElement) {
+        CPDF_Font* pFont = m_pField->m_pForm->m_pDocument->LoadFont(pElement);
+        if (pFont) {
+          return pFont;
+        }
+      }
+    }
+  }
+  return nullptr;
+}
+
+int CPDF_FormControl::GetControlAlignment() {
+  if (!m_pWidgetDict) {
+    return 0;
+  }
+  if (m_pWidgetDict->KeyExist("Q")) {
+    return m_pWidgetDict->GetIntegerBy("Q", 0);
+  }
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pField->m_pDict, "Q");
+  if (pObj)
+    return pObj->GetInteger();
+  return m_pField->m_pForm->GetFormAlignment();
+}
+
+CPDF_ApSettings::CPDF_ApSettings(CPDF_Dictionary* pDict) : m_pDict(pDict) {}
+
+bool CPDF_ApSettings::HasMKEntry(const CFX_ByteStringC& csEntry) const {
+  return m_pDict && m_pDict->KeyExist(csEntry);
+}
+
+int CPDF_ApSettings::GetRotation() const {
+  return m_pDict ? m_pDict->GetIntegerBy("R") : 0;
+}
+
+FX_ARGB CPDF_ApSettings::GetColor(int& iColorType,
+                                  const CFX_ByteStringC& csEntry) const {
+  iColorType = COLORTYPE_TRANSPARENT;
+  if (!m_pDict)
+    return 0;
+
+  CPDF_Array* pEntry = m_pDict->GetArrayBy(csEntry);
+  if (!pEntry)
+    return 0;
+
+  FX_ARGB color = 0;
+  FX_DWORD dwCount = pEntry->GetCount();
+  if (dwCount == 1) {
+    iColorType = COLORTYPE_GRAY;
+    FX_FLOAT g = pEntry->GetNumberAt(0) * 255;
+    color = ArgbEncode(255, (int)g, (int)g, (int)g);
+  } else if (dwCount == 3) {
+    iColorType = COLORTYPE_RGB;
+    FX_FLOAT r = pEntry->GetNumberAt(0) * 255;
+    FX_FLOAT g = pEntry->GetNumberAt(1) * 255;
+    FX_FLOAT b = pEntry->GetNumberAt(2) * 255;
+    color = ArgbEncode(255, (int)r, (int)g, (int)b);
+  } else if (dwCount == 4) {
+    iColorType = COLORTYPE_CMYK;
+    FX_FLOAT c = pEntry->GetNumberAt(0);
+    FX_FLOAT m = pEntry->GetNumberAt(1);
+    FX_FLOAT y = pEntry->GetNumberAt(2);
+    FX_FLOAT k = pEntry->GetNumberAt(3);
+    FX_FLOAT r = 1.0f - std::min(1.0f, c + k);
+    FX_FLOAT g = 1.0f - std::min(1.0f, m + k);
+    FX_FLOAT b = 1.0f - std::min(1.0f, y + k);
+    color = ArgbEncode(255, (int)(r * 255), (int)(g * 255), (int)(b * 255));
+  }
+  return color;
+}
+
+FX_FLOAT CPDF_ApSettings::GetOriginalColor(
+    int index,
+    const CFX_ByteStringC& csEntry) const {
+  if (!m_pDict)
+    return 0;
+
+  CPDF_Array* pEntry = m_pDict->GetArrayBy(csEntry);
+  return pEntry ? pEntry->GetNumberAt(index) : 0;
+}
+
+void CPDF_ApSettings::GetOriginalColor(int& iColorType,
+                                       FX_FLOAT fc[4],
+                                       const CFX_ByteStringC& csEntry) const {
+  iColorType = COLORTYPE_TRANSPARENT;
+  for (int i = 0; i < 4; i++) {
+    fc[i] = 0;
+  }
+  if (!m_pDict) {
+    return;
+  }
+  CPDF_Array* pEntry = m_pDict->GetArrayBy(csEntry);
+  if (!pEntry) {
+    return;
+  }
+  FX_DWORD dwCount = pEntry->GetCount();
+  if (dwCount == 1) {
+    iColorType = COLORTYPE_GRAY;
+    fc[0] = pEntry->GetNumberAt(0);
+  } else if (dwCount == 3) {
+    iColorType = COLORTYPE_RGB;
+    fc[0] = pEntry->GetNumberAt(0);
+    fc[1] = pEntry->GetNumberAt(1);
+    fc[2] = pEntry->GetNumberAt(2);
+  } else if (dwCount == 4) {
+    iColorType = COLORTYPE_CMYK;
+    fc[0] = pEntry->GetNumberAt(0);
+    fc[1] = pEntry->GetNumberAt(1);
+    fc[2] = pEntry->GetNumberAt(2);
+    fc[3] = pEntry->GetNumberAt(3);
+  }
+}
+
+CFX_WideString CPDF_ApSettings::GetCaption(
+    const CFX_ByteStringC& csEntry) const {
+  return m_pDict ? m_pDict->GetUnicodeTextBy(csEntry) : CFX_WideString();
+}
+
+CPDF_Stream* CPDF_ApSettings::GetIcon(const CFX_ByteStringC& csEntry) const {
+  return m_pDict ? m_pDict->GetStreamBy(csEntry) : nullptr;
+}
+
+CPDF_IconFit CPDF_ApSettings::GetIconFit() const {
+  return CPDF_IconFit(m_pDict ? m_pDict->GetDictBy("IF") : nullptr);
+}
+
+int CPDF_ApSettings::GetTextPosition() const {
+  return m_pDict ? m_pDict->GetIntegerBy("TP", TEXTPOS_CAPTION)
+                 : TEXTPOS_CAPTION;
+}
diff --git a/core/fpdfdoc/doc_formfield.cpp b/core/fpdfdoc/doc_formfield.cpp
new file mode 100644
index 0000000000..7ad8cacea9
--- /dev/null
+++ b/core/fpdfdoc/doc_formfield.cpp
@@ -0,0 +1,1097 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fpdfdoc/doc_utils.h"
+#include "core/include/fpdfapi/cfdf_document.h"
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfapi/cpdf_number.h"
+#include "core/include/fpdfapi/cpdf_simple_parser.h"
+#include "core/include/fpdfapi/cpdf_string.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+
+FX_BOOL PDF_FormField_IsUnison(CPDF_FormField* pField) {
+  FX_BOOL bUnison = FALSE;
+  if (pField->GetType() == CPDF_FormField::CheckBox) {
+    bUnison = TRUE;
+  } else {
+    FX_DWORD dwFlags = pField->GetFieldFlags();
+    bUnison = ((dwFlags & 0x2000000) != 0);
+  }
+  return bUnison;
+}
+CPDF_FormField::CPDF_FormField(CPDF_InterForm* pForm, CPDF_Dictionary* pDict) {
+  m_pDict = pDict;
+  m_Type = Unknown;
+  m_pForm = pForm;
+  m_pFont = NULL;
+  m_FontSize = 0;
+  SyncFieldFlags();
+}
+CPDF_FormField::~CPDF_FormField() {}
+void CPDF_FormField::SyncFieldFlags() {
+  CFX_ByteString type_name = FPDF_GetFieldAttr(m_pDict, "FT")
+                                 ? FPDF_GetFieldAttr(m_pDict, "FT")->GetString()
+                                 : CFX_ByteString();
+  FX_DWORD flags = FPDF_GetFieldAttr(m_pDict, "Ff")
+                       ? FPDF_GetFieldAttr(m_pDict, "Ff")->GetInteger()
+                       : 0;
+  m_Flags = 0;
+  if (flags & 1) {
+    m_Flags |= FORMFIELD_READONLY;
+  }
+  if (flags & 2) {
+    m_Flags |= FORMFIELD_REQUIRED;
+  }
+  if (flags & 4) {
+    m_Flags |= FORMFIELD_NOEXPORT;
+  }
+  if (type_name == "Btn") {
+    if (flags & 0x8000) {
+      m_Type = RadioButton;
+      if (flags & 0x4000) {
+        m_Flags |= FORMRADIO_NOTOGGLEOFF;
+      }
+      if (flags & 0x2000000) {
+        m_Flags |= FORMRADIO_UNISON;
+      }
+    } else if (flags & 0x10000) {
+      m_Type = PushButton;
+    } else {
+      m_Type = CheckBox;
+    }
+  } else if (type_name == "Tx") {
+    if (flags & 0x100000) {
+      m_Type = File;
+    } else if (flags & 0x2000000) {
+      m_Type = RichText;
+    } else {
+      m_Type = Text;
+      if (flags & 0x1000) {
+        m_Flags |= FORMTEXT_MULTILINE;
+      }
+      if (flags & 0x2000) {
+        m_Flags |= FORMTEXT_PASSWORD;
+      }
+      if (flags & 0x800000) {
+        m_Flags |= FORMTEXT_NOSCROLL;
+      }
+      if (flags & 0x100000) {
+        m_Flags |= FORMTEXT_COMB;
+      }
+    }
+    LoadDA();
+  } else if (type_name == "Ch") {
+    if (flags & 0x20000) {
+      m_Type = ComboBox;
+      if (flags & 0x40000) {
+        m_Flags |= FORMCOMBO_EDIT;
+      }
+    } else {
+      m_Type = ListBox;
+      if (flags & 0x200000) {
+        m_Flags |= FORMLIST_MULTISELECT;
+      }
+    }
+    LoadDA();
+  } else if (type_name == "Sig") {
+    m_Type = Sign;
+  }
+}
+CFX_WideString CPDF_FormField::GetFullName() {
+  return ::GetFullName(m_pDict);
+}
+FX_BOOL CPDF_FormField::ResetField(FX_BOOL bNotify) {
+  switch (m_Type) {
+    case CPDF_FormField::CheckBox:
+    case CPDF_FormField::RadioButton: {
+      int iCount = CountControls();
+      if (iCount) {
+        // TODO(weili): Check whether anything special needs to be done for
+        // unison field. Otherwise, merge these branches.
+        if (PDF_FormField_IsUnison(this)) {
+          for (int i = 0; i < iCount; i++) {
+            CheckControl(i, GetControl(i)->IsDefaultChecked(), FALSE);
+          }
+        } else {
+          for (int i = 0; i < iCount; i++) {
+            CheckControl(i, GetControl(i)->IsDefaultChecked(), FALSE);
+          }
+        }
+      }
+      if (bNotify && m_pForm->m_pFormNotify) {
+        m_pForm->m_pFormNotify->AfterCheckedStatusChange(this);
+      }
+    } break;
+    case CPDF_FormField::ComboBox: {
+      CFX_WideString csValue;
+      ClearSelection();
+      int iIndex = GetDefaultSelectedItem();
+      if (iIndex >= 0) {
+        csValue = GetOptionLabel(iIndex);
+      }
+      if (bNotify && m_pForm->m_pFormNotify) {
+        int iRet = m_pForm->m_pFormNotify->BeforeValueChange(this, csValue);
+        if (iRet < 0) {
+          return FALSE;
+        }
+      }
+      SetItemSelection(iIndex, TRUE);
+      if (bNotify && m_pForm->m_pFormNotify) {
+        m_pForm->m_pFormNotify->AfterValueChange(this);
+      }
+    } break;
+    case CPDF_FormField::ListBox: {
+      CFX_WideString csValue;
+      ClearSelection();
+      int iIndex = GetDefaultSelectedItem();
+      if (iIndex >= 0) {
+        csValue = GetOptionLabel(iIndex);
+      }
+      if (bNotify && m_pForm->m_pFormNotify) {
+        int iRet = m_pForm->m_pFormNotify->BeforeSelectionChange(this, csValue);
+        if (iRet < 0) {
+          return FALSE;
+        }
+      }
+      SetItemSelection(iIndex, TRUE);
+      if (bNotify && m_pForm->m_pFormNotify) {
+        m_pForm->m_pFormNotify->AfterSelectionChange(this);
+      }
+    } break;
+    case CPDF_FormField::Text:
+    case CPDF_FormField::RichText:
+    case CPDF_FormField::File:
+    default: {
+      CPDF_Object* pDV = FPDF_GetFieldAttr(m_pDict, "DV");
+      CFX_WideString csDValue;
+      if (pDV) {
+        csDValue = pDV->GetUnicodeText();
+      }
+      CPDF_Object* pV = FPDF_GetFieldAttr(m_pDict, "V");
+      CFX_WideString csValue;
+      if (pV) {
+        csValue = pV->GetUnicodeText();
+      }
+      CPDF_Object* pRV = FPDF_GetFieldAttr(m_pDict, "RV");
+      if (!pRV && (csDValue == csValue)) {
+        return FALSE;
+      }
+      if (bNotify && m_pForm->m_pFormNotify) {
+        int iRet = m_pForm->m_pFormNotify->BeforeValueChange(this, csDValue);
+        if (iRet < 0) {
+          return FALSE;
+        }
+      }
+      if (pDV) {
+        CPDF_Object* pClone = pDV->Clone();
+        if (!pClone) {
+          return FALSE;
+        }
+        m_pDict->SetAt("V", pClone);
+        if (pRV) {
+          CPDF_Object* pCloneR = pDV->Clone();
+          m_pDict->SetAt("RV", pCloneR);
+        }
+      } else {
+        m_pDict->RemoveAt("V");
+        m_pDict->RemoveAt("RV");
+      }
+      if (bNotify && m_pForm->m_pFormNotify) {
+        m_pForm->m_pFormNotify->AfterValueChange(this);
+      }
+      m_pForm->m_bUpdated = TRUE;
+    } break;
+  }
+  return TRUE;
+}
+int CPDF_FormField::GetControlIndex(const CPDF_FormControl* pControl) {
+  if (!pControl) {
+    return -1;
+  }
+  for (int i = 0; i < m_ControlList.GetSize(); i++) {
+    if (m_ControlList.GetAt(i) == pControl)
+      return i;
+  }
+  return -1;
+}
+int CPDF_FormField::GetFieldType() {
+  switch (m_Type) {
+    case PushButton:
+      return FIELDTYPE_PUSHBUTTON;
+    case CheckBox:
+      return FIELDTYPE_CHECKBOX;
+    case RadioButton:
+      return FIELDTYPE_RADIOBUTTON;
+    case ComboBox:
+      return FIELDTYPE_COMBOBOX;
+    case ListBox:
+      return FIELDTYPE_LISTBOX;
+    case Text:
+    case RichText:
+    case File:
+      return FIELDTYPE_TEXTFIELD;
+    case Sign:
+      return FIELDTYPE_SIGNATURE;
+    default:
+      break;
+  }
+  return FIELDTYPE_UNKNOWN;
+}
+
+CPDF_AAction CPDF_FormField::GetAdditionalAction() {
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "AA");
+  return CPDF_AAction(pObj ? pObj->GetDict() : nullptr);
+}
+
+CFX_WideString CPDF_FormField::GetAlternateName() {
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "TU");
+  if (!pObj) {
+    return L"";
+  }
+  return pObj->GetUnicodeText();
+}
+CFX_WideString CPDF_FormField::GetMappingName() {
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "TM");
+  if (!pObj) {
+    return L"";
+  }
+  return pObj->GetUnicodeText();
+}
+FX_DWORD CPDF_FormField::GetFieldFlags() {
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "Ff");
+  if (!pObj) {
+    return 0;
+  }
+  return pObj->GetInteger();
+}
+CFX_ByteString CPDF_FormField::GetDefaultStyle() {
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "DS");
+  if (!pObj) {
+    return "";
+  }
+  return pObj->GetString();
+}
+CFX_WideString CPDF_FormField::GetRichTextString() {
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "RV");
+  if (!pObj) {
+    return L"";
+  }
+  return pObj->GetUnicodeText();
+}
+CFX_WideString CPDF_FormField::GetValue(FX_BOOL bDefault) {
+  if (GetType() == CheckBox || GetType() == RadioButton) {
+    return GetCheckValue(bDefault);
+  }
+  CPDF_Object* pValue = FPDF_GetFieldAttr(m_pDict, bDefault ? "DV" : "V");
+  if (!pValue) {
+    if (!bDefault) {
+      if (m_Type == RichText) {
+        pValue = FPDF_GetFieldAttr(m_pDict, "V");
+      }
+      if (!pValue && m_Type != Text) {
+        pValue = FPDF_GetFieldAttr(m_pDict, "DV");
+      }
+    }
+    if (!pValue) {
+      return CFX_WideString();
+    }
+  }
+  switch (pValue->GetType()) {
+    case CPDF_Object::STRING:
+    case CPDF_Object::STREAM:
+      return pValue->GetUnicodeText();
+    case CPDF_Object::ARRAY:
+      pValue = pValue->AsArray()->GetElementValue(0);
+      if (pValue)
+        return pValue->GetUnicodeText();
+      break;
+    default:
+      break;
+  }
+  return CFX_WideString();
+}
+CFX_WideString CPDF_FormField::GetValue() {
+  return GetValue(FALSE);
+}
+CFX_WideString CPDF_FormField::GetDefaultValue() {
+  return GetValue(TRUE);
+}
+FX_BOOL CPDF_FormField::SetValue(const CFX_WideString& value,
+                                 FX_BOOL bDefault,
+                                 FX_BOOL bNotify) {
+  switch (m_Type) {
+    case CheckBox:
+    case RadioButton: {
+      SetCheckValue(value, bDefault, bNotify);
+      return TRUE;
+    }
+    case File:
+    case RichText:
+    case Text:
+    case ComboBox: {
+      CFX_WideString csValue = value;
+      if (bNotify && m_pForm->m_pFormNotify) {
+        int iRet = m_pForm->m_pFormNotify->BeforeValueChange(this, csValue);
+        if (iRet < 0) {
+          return FALSE;
+        }
+      }
+      int iIndex = FindOptionValue(csValue);
+      if (iIndex < 0) {
+        CFX_ByteString bsEncodeText = PDF_EncodeText(csValue);
+        m_pDict->SetAtString(bDefault ? "DV" : "V", bsEncodeText);
+        if (m_Type == RichText && !bDefault) {
+          m_pDict->SetAtString("RV", bsEncodeText);
+        }
+        m_pDict->RemoveAt("I");
+      } else {
+        m_pDict->SetAtString(bDefault ? "DV" : "V", PDF_EncodeText(csValue));
+        if (bDefault) {
+        } else {
+          ClearSelection();
+          SetItemSelection(iIndex, TRUE);
+        }
+      }
+      if (bNotify && m_pForm->m_pFormNotify) {
+        m_pForm->m_pFormNotify->AfterValueChange(this);
+      }
+      m_pForm->m_bUpdated = TRUE;
+    } break;
+    case ListBox: {
+      int iIndex = FindOptionValue(value);
+      if (iIndex < 0) {
+        return FALSE;
+      }
+      if (bDefault && iIndex == GetDefaultSelectedItem()) {
+        return FALSE;
+      }
+      if (bNotify && m_pForm->m_pFormNotify) {
+        CFX_WideString csValue = value;
+        int iRet = m_pForm->m_pFormNotify->BeforeSelectionChange(this, csValue);
+        if (iRet < 0) {
+          return FALSE;
+        }
+      }
+      if (bDefault) {
+      } else {
+        ClearSelection();
+        SetItemSelection(iIndex, TRUE);
+      }
+      if (bNotify && m_pForm->m_pFormNotify) {
+        m_pForm->m_pFormNotify->AfterSelectionChange(this);
+      }
+      m_pForm->m_bUpdated = TRUE;
+      break;
+    }
+    default:
+      break;
+  }
+  if (CPDF_InterForm::m_bUpdateAP) {
+    UpdateAP(NULL);
+  }
+  return TRUE;
+}
+FX_BOOL CPDF_FormField::SetValue(const CFX_WideString& value, FX_BOOL bNotify) {
+  return SetValue(value, FALSE, bNotify);
+}
+int CPDF_FormField::GetMaxLen() {
+  if (CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "MaxLen"))
+    return pObj->GetInteger();
+
+  for (int i = 0; i < m_ControlList.GetSize(); i++) {
+    CPDF_FormControl* pControl = m_ControlList.GetAt(i);
+    if (!pControl)
+      continue;
+
+    CPDF_Dictionary* pWidgetDict = pControl->m_pWidgetDict;
+    if (pWidgetDict->KeyExist("MaxLen"))
+      return pWidgetDict->GetIntegerBy("MaxLen");
+  }
+  return 0;
+}
+int CPDF_FormField::CountSelectedItems() {
+  CPDF_Object* pValue = FPDF_GetFieldAttr(m_pDict, "V");
+  if (!pValue) {
+    pValue = FPDF_GetFieldAttr(m_pDict, "I");
+    if (!pValue)
+      return 0;
+  }
+
+  if (pValue->IsString() || pValue->IsNumber())
+    return pValue->GetString().IsEmpty() ? 0 : 1;
+  if (CPDF_Array* pArray = pValue->AsArray())
+    return pArray->GetCount();
+  return 0;
+}
+int CPDF_FormField::GetSelectedIndex(int index) {
+  CPDF_Object* pValue = FPDF_GetFieldAttr(m_pDict, "V");
+  if (!pValue) {
+    pValue = FPDF_GetFieldAttr(m_pDict, "I");
+    if (!pValue)
+      return -1;
+  }
+  if (pValue->IsNumber())
+    return pValue->GetInteger();
+
+  CFX_WideString sel_value;
+  if (pValue->IsString()) {
+    if (index != 0)
+      return -1;
+    sel_value = pValue->GetUnicodeText();
+  } else {
+    CPDF_Array* pArray = pValue->AsArray();
+    if (!pArray || index < 0)
+      return -1;
+
+    CPDF_Object* elementValue = pArray->GetElementValue(index);
+    sel_value =
+        elementValue ? elementValue->GetUnicodeText() : CFX_WideString();
+  }
+  if (index < CountSelectedOptions()) {
+    int iOptIndex = GetSelectedOptionIndex(index);
+    CFX_WideString csOpt = GetOptionValue(iOptIndex);
+    if (csOpt == sel_value) {
+      return iOptIndex;
+    }
+  }
+  int nOpts = CountOptions();
+  for (int i = 0; i < nOpts; i++) {
+    if (sel_value == GetOptionValue(i)) {
+      return i;
+    }
+  }
+  return -1;
+}
+FX_BOOL CPDF_FormField::ClearSelection(FX_BOOL bNotify) {
+  if (bNotify && m_pForm->m_pFormNotify) {
+    int iRet = 0;
+    CFX_WideString csValue;
+    int iIndex = GetSelectedIndex(0);
+    if (iIndex >= 0) {
+      csValue = GetOptionLabel(iIndex);
+    }
+    if (GetType() == ListBox) {
+      iRet = m_pForm->m_pFormNotify->BeforeSelectionChange(this, csValue);
+    }
+    if (GetType() == ComboBox) {
+      iRet = m_pForm->m_pFormNotify->BeforeValueChange(this, csValue);
+    }
+    if (iRet < 0) {
+      return FALSE;
+    }
+  }
+  m_pDict->RemoveAt("V");
+  m_pDict->RemoveAt("I");
+  if (bNotify && m_pForm->m_pFormNotify) {
+    if (GetType() == ListBox) {
+      m_pForm->m_pFormNotify->AfterSelectionChange(this);
+    }
+    if (GetType() == ComboBox) {
+      m_pForm->m_pFormNotify->AfterValueChange(this);
+    }
+  }
+  if (CPDF_InterForm::m_bUpdateAP) {
+    UpdateAP(NULL);
+  }
+  m_pForm->m_bUpdated = TRUE;
+  return TRUE;
+}
+FX_BOOL CPDF_FormField::IsItemSelected(int index) {
+  ASSERT(GetType() == ComboBox || GetType() == ListBox);
+  if (index < 0 || index >= CountOptions()) {
+    return FALSE;
+  }
+  if (IsOptionSelected(index)) {
+    return TRUE;
+  }
+  CFX_WideString opt_value = GetOptionValue(index);
+  CPDF_Object* pValue = FPDF_GetFieldAttr(m_pDict, "V");
+  if (!pValue) {
+    pValue = FPDF_GetFieldAttr(m_pDict, "I");
+    if (!pValue) {
+      return FALSE;
+    }
+  }
+
+  if (pValue->IsString())
+    return pValue->GetUnicodeText() == opt_value;
+
+  if (pValue->IsNumber()) {
+    if (pValue->GetString().IsEmpty())
+      return FALSE;
+    return (pValue->GetInteger() == index);
+  }
+
+  CPDF_Array* pArray = pValue->AsArray();
+  if (!pArray)
+    return FALSE;
+
+  int iPos = -1;
+  for (int j = 0; j < CountSelectedOptions(); j++) {
+    if (GetSelectedOptionIndex(j) == index) {
+      iPos = j;
+      break;
+    }
+  }
+  for (FX_DWORD i = 0; i < pArray->GetCount(); i++)
+    if (pArray->GetElementValue(i)->GetUnicodeText() == opt_value &&
+        (int)i == iPos) {
+      return TRUE;
+    }
+  return FALSE;
+}
+FX_BOOL CPDF_FormField::SetItemSelection(int index,
+                                         FX_BOOL bSelected,
+                                         FX_BOOL bNotify) {
+  ASSERT(GetType() == ComboBox || GetType() == ListBox);
+  if (index < 0 || index >= CountOptions()) {
+    return FALSE;
+  }
+  CFX_WideString opt_value = GetOptionValue(index);
+  if (bNotify && m_pForm->m_pFormNotify) {
+    int iRet = 0;
+    if (GetType() == ListBox) {
+      iRet = m_pForm->m_pFormNotify->BeforeSelectionChange(this, opt_value);
+    }
+    if (GetType() == ComboBox) {
+      iRet = m_pForm->m_pFormNotify->BeforeValueChange(this, opt_value);
+    }
+    if (iRet < 0) {
+      return FALSE;
+    }
+  }
+  if (!bSelected) {
+    CPDF_Object* pValue = FPDF_GetFieldAttr(m_pDict, "V");
+    if (pValue) {
+      if (m_Type == ListBox) {
+        SelectOption(index, FALSE);
+        if (pValue->IsString()) {
+          if (pValue->GetUnicodeText() == opt_value) {
+            m_pDict->RemoveAt("V");
+          }
+        } else if (pValue->IsArray()) {
+          CPDF_Array* pArray = new CPDF_Array;
+          int iCount = CountOptions();
+          for (int i = 0; i < iCount; i++) {
+            if (i != index) {
+              if (IsItemSelected(i)) {
+                opt_value = GetOptionValue(i);
+                pArray->AddString(PDF_EncodeText(opt_value));
+              }
+            }
+          }
+          if (pArray->GetCount() < 1) {
+            pArray->Release();
+          } else {
+            m_pDict->SetAt("V", pArray);
+          }
+        }
+      } else if (m_Type == ComboBox) {
+        m_pDict->RemoveAt("V");
+        m_pDict->RemoveAt("I");
+      }
+    }
+  } else {
+    if (m_Type == ListBox) {
+      SelectOption(index, TRUE);
+      if (!(m_Flags & FORMLIST_MULTISELECT)) {
+        m_pDict->SetAtString("V", PDF_EncodeText(opt_value));
+      } else {
+        CPDF_Array* pArray = new CPDF_Array;
+        int iCount = CountOptions();
+        for (int i = 0; i < iCount; i++) {
+          FX_BOOL bSelected;
+          if (i != index) {
+            bSelected = IsItemSelected(i);
+          } else {
+            bSelected = TRUE;
+          }
+          if (bSelected) {
+            opt_value = GetOptionValue(i);
+            pArray->AddString(PDF_EncodeText(opt_value));
+          }
+        }
+        m_pDict->SetAt("V", pArray);
+      }
+    } else if (m_Type == ComboBox) {
+      m_pDict->SetAtString("V", PDF_EncodeText(opt_value));
+      CPDF_Array* pI = new CPDF_Array;
+      pI->AddInteger(index);
+      m_pDict->SetAt("I", pI);
+    }
+  }
+  if (bNotify && m_pForm->m_pFormNotify) {
+    if (GetType() == ListBox) {
+      m_pForm->m_pFormNotify->AfterSelectionChange(this);
+    }
+    if (GetType() == ComboBox) {
+      m_pForm->m_pFormNotify->AfterValueChange(this);
+    }
+  }
+  if (CPDF_InterForm::m_bUpdateAP) {
+    UpdateAP(NULL);
+  }
+  m_pForm->m_bUpdated = TRUE;
+  return TRUE;
+}
+FX_BOOL CPDF_FormField::IsItemDefaultSelected(int index) {
+  ASSERT(GetType() == ComboBox || GetType() == ListBox);
+  if (index < 0 || index >= CountOptions()) {
+    return FALSE;
+  }
+  int iDVIndex = GetDefaultSelectedItem();
+  if (iDVIndex < 0) {
+    return FALSE;
+  }
+  return (iDVIndex == index);
+}
+int CPDF_FormField::GetDefaultSelectedItem() {
+  ASSERT(GetType() == ComboBox || GetType() == ListBox);
+  CPDF_Object* pValue = FPDF_GetFieldAttr(m_pDict, "DV");
+  if (!pValue) {
+    return -1;
+  }
+  CFX_WideString csDV = pValue->GetUnicodeText();
+  if (csDV.IsEmpty()) {
+    return -1;
+  }
+  int iCount = CountOptions();
+  for (int i = 0; i < iCount; i++) {
+    if (csDV == GetOptionValue(i)) {
+      return i;
+    }
+  }
+  return -1;
+}
+void CPDF_FormField::UpdateAP(CPDF_FormControl* pControl) {
+  if (m_Type == PushButton) {
+    return;
+  }
+  if (m_Type == RadioButton || m_Type == CheckBox) {
+    return;
+  }
+  if (!m_pForm->m_bGenerateAP) {
+    return;
+  }
+  for (int i = 0; i < CountControls(); i++) {
+    CPDF_FormControl* pControl = GetControl(i);
+    FPDF_GenerateAP(m_pForm->m_pDocument, pControl->m_pWidgetDict);
+  }
+}
+int CPDF_FormField::CountOptions() {
+  CPDF_Array* pArray = ToArray(FPDF_GetFieldAttr(m_pDict, "Opt"));
+  return pArray ? pArray->GetCount() : 0;
+}
+CFX_WideString CPDF_FormField::GetOptionText(int index, int sub_index) {
+  CPDF_Array* pArray = ToArray(FPDF_GetFieldAttr(m_pDict, "Opt"));
+  if (!pArray)
+    return CFX_WideString();
+
+  CPDF_Object* pOption = pArray->GetElementValue(index);
+  if (!pOption)
+    return CFX_WideString();
+  if (CPDF_Array* pOptionArray = pOption->AsArray())
+    pOption = pOptionArray->GetElementValue(sub_index);
+
+  CPDF_String* pString = ToString(pOption);
+  return pString ? pString->GetUnicodeText() : CFX_WideString();
+}
+CFX_WideString CPDF_FormField::GetOptionLabel(int index) {
+  return GetOptionText(index, 1);
+}
+CFX_WideString CPDF_FormField::GetOptionValue(int index) {
+  return GetOptionText(index, 0);
+}
+int CPDF_FormField::FindOption(CFX_WideString csOptLabel) {
+  int iCount = CountOptions();
+  for (int i = 0; i < iCount; i++) {
+    CFX_WideString csValue = GetOptionValue(i);
+    if (csValue == csOptLabel) {
+      return i;
+    }
+  }
+  return -1;
+}
+int CPDF_FormField::FindOptionValue(const CFX_WideString& csOptValue,
+                                    int iStartIndex) {
+  if (iStartIndex < 0) {
+    iStartIndex = 0;
+  }
+  int iCount = CountOptions();
+  for (; iStartIndex < iCount; iStartIndex++) {
+    CFX_WideString csValue = GetOptionValue(iStartIndex);
+    if (csValue == csOptValue) {
+      return iStartIndex;
+    }
+  }
+  return -1;
+}
+#ifdef PDF_ENABLE_XFA
+int CPDF_FormField::InsertOption(CFX_WideString csOptLabel,
+                                 int index,
+                                 FX_BOOL bNotify) {
+  if (csOptLabel.IsEmpty())
+    return -1;
+
+  if (bNotify && m_pForm->m_pFormNotify) {
+    int iRet = 0;
+    if (GetType() == ListBox)
+      iRet = m_pForm->m_pFormNotify->BeforeSelectionChange(this, csOptLabel);
+    if (GetType() == ComboBox)
+      iRet = m_pForm->m_pFormNotify->BeforeValueChange(this, csOptLabel);
+    if (iRet < 0)
+      return -1;
+  }
+
+  CFX_ByteString csStr = PDF_EncodeText(csOptLabel, csOptLabel.GetLength());
+  CPDF_Object* pValue = FPDF_GetFieldAttr(m_pDict, "Opt");
+  CPDF_Array* pOpt = ToArray(pValue);
+  if (!pOpt) {
+    pOpt = new CPDF_Array;
+    m_pDict->SetAt("Opt", pOpt);
+  }
+
+  int iCount = (int)pOpt->GetCount();
+  if (index < 0 || index >= iCount) {
+    pOpt->AddString(csStr);
+    index = iCount;
+  } else {
+    CPDF_String* pString = new CPDF_String(csStr, FALSE);
+    pOpt->InsertAt(index, pString);
+  }
+
+  if (bNotify && m_pForm->m_pFormNotify) {
+    if (GetType() == ListBox)
+      m_pForm->m_pFormNotify->AfterSelectionChange(this);
+    if (GetType() == ComboBox)
+      m_pForm->m_pFormNotify->AfterValueChange(this);
+  }
+  m_pForm->m_bUpdated = TRUE;
+  return index;
+}
+FX_BOOL CPDF_FormField::ClearOptions(FX_BOOL bNotify) {
+  if (bNotify && m_pForm->m_pFormNotify) {
+    int iRet = 0;
+    CFX_WideString csValue;
+    int iIndex = GetSelectedIndex(0);
+    if (iIndex >= 0)
+      csValue = GetOptionLabel(iIndex);
+    if (GetType() == ListBox)
+      iRet = m_pForm->m_pFormNotify->BeforeSelectionChange(this, csValue);
+    if (GetType() == ComboBox)
+      iRet = m_pForm->m_pFormNotify->BeforeValueChange(this, csValue);
+    if (iRet < 0)
+      return FALSE;
+  }
+
+  m_pDict->RemoveAt("Opt");
+  m_pDict->RemoveAt("V");
+  m_pDict->RemoveAt("DV");
+  m_pDict->RemoveAt("I");
+  m_pDict->RemoveAt("TI");
+
+  if (bNotify && m_pForm->m_pFormNotify) {
+    if (GetType() == ListBox)
+      m_pForm->m_pFormNotify->AfterSelectionChange(this);
+    if (GetType() == ComboBox)
+      m_pForm->m_pFormNotify->AfterValueChange(this);
+  }
+
+  m_pForm->m_bUpdated = TRUE;
+  return TRUE;
+}
+#endif  // PDF_ENABLE_XFA
+FX_BOOL CPDF_FormField::CheckControl(int iControlIndex,
+                                     bool bChecked,
+                                     bool bNotify) {
+  ASSERT(GetType() == CheckBox || GetType() == RadioButton);
+  CPDF_FormControl* pControl = GetControl(iControlIndex);
+  if (!pControl) {
+    return FALSE;
+  }
+  if (!bChecked && pControl->IsChecked() == bChecked) {
+    return FALSE;
+  }
+  CFX_WideString csWExport = pControl->GetExportValue();
+  CFX_ByteString csBExport = PDF_EncodeText(csWExport);
+  int iCount = CountControls();
+  FX_BOOL bUnison = PDF_FormField_IsUnison(this);
+  for (int i = 0; i < iCount; i++) {
+    CPDF_FormControl* pCtrl = GetControl(i);
+    if (bUnison) {
+      CFX_WideString csEValue = pCtrl->GetExportValue();
+      if (csEValue == csWExport) {
+        if (pCtrl->GetOnStateName() == pControl->GetOnStateName()) {
+          pCtrl->CheckControl(bChecked);
+        } else if (bChecked) {
+          pCtrl->CheckControl(FALSE);
+        }
+      } else if (bChecked) {
+        pCtrl->CheckControl(FALSE);
+      }
+    } else {
+      if (i == iControlIndex) {
+        pCtrl->CheckControl(bChecked);
+      } else if (bChecked) {
+        pCtrl->CheckControl(FALSE);
+      }
+    }
+  }
+  CPDF_Object* pOpt = FPDF_GetFieldAttr(m_pDict, "Opt");
+  if (!ToArray(pOpt)) {
+    if (bChecked) {
+      m_pDict->SetAtName("V", csBExport);
+    } else {
+      CFX_ByteString csV;
+      CPDF_Object* pV = FPDF_GetFieldAttr(m_pDict, "V");
+      if (pV) {
+        csV = pV->GetString();
+      }
+      if (csV == csBExport) {
+        m_pDict->SetAtName("V", "Off");
+      }
+    }
+  } else if (bChecked) {
+    CFX_ByteString csIndex;
+    csIndex.Format("%d", iControlIndex);
+    m_pDict->SetAtName("V", csIndex);
+  }
+  if (bNotify && m_pForm->m_pFormNotify) {
+    m_pForm->m_pFormNotify->AfterCheckedStatusChange(this);
+  }
+  m_pForm->m_bUpdated = TRUE;
+  return TRUE;
+}
+CFX_WideString CPDF_FormField::GetCheckValue(FX_BOOL bDefault) {
+  ASSERT(GetType() == CheckBox || GetType() == RadioButton);
+  CFX_WideString csExport = L"Off";
+  FX_BOOL bChecked;
+  int iCount = CountControls();
+  for (int i = 0; i < iCount; i++) {
+    CPDF_FormControl* pControl = GetControl(i);
+    if (bDefault) {
+      bChecked = pControl->IsDefaultChecked();
+    } else {
+      bChecked = pControl->IsChecked();
+    }
+    if (bChecked) {
+      csExport = pControl->GetExportValue();
+      break;
+    }
+  }
+  return csExport;
+}
+FX_BOOL CPDF_FormField::SetCheckValue(const CFX_WideString& value,
+                                      FX_BOOL bDefault,
+                                      FX_BOOL bNotify) {
+  ASSERT(GetType() == CheckBox || GetType() == RadioButton);
+  int iCount = CountControls();
+  for (int i = 0; i < iCount; i++) {
+    CPDF_FormControl* pControl = GetControl(i);
+    CFX_WideString csExport = pControl->GetExportValue();
+    if (csExport == value) {
+      if (bDefault) {
+      } else {
+        CheckControl(GetControlIndex(pControl), TRUE);
+      }
+      break;
+    } else {
+      if (bDefault) {
+      } else {
+        CheckControl(GetControlIndex(pControl), FALSE);
+      }
+    }
+  }
+  if (bNotify && m_pForm->m_pFormNotify) {
+    m_pForm->m_pFormNotify->AfterCheckedStatusChange(this);
+  }
+  m_pForm->m_bUpdated = TRUE;
+  return TRUE;
+}
+int CPDF_FormField::GetTopVisibleIndex() {
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "TI");
+  if (!pObj) {
+    return 0;
+  }
+  return pObj->GetInteger();
+}
+int CPDF_FormField::CountSelectedOptions() {
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "I");
+  if (!pObj) {
+    return 0;
+  }
+  CPDF_Array* pArray = pObj->GetArray();
+  if (!pArray) {
+    return 0;
+  }
+  return (int)pArray->GetCount();
+}
+int CPDF_FormField::GetSelectedOptionIndex(int index) {
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "I");
+  if (!pObj) {
+    return -1;
+  }
+  CPDF_Array* pArray = pObj->GetArray();
+  if (!pArray) {
+    return -1;
+  }
+  int iCount = (int)pArray->GetCount();
+  if (iCount > 0 && index < iCount) {
+    return pArray->GetIntegerAt(index);
+  }
+  return -1;
+}
+FX_BOOL CPDF_FormField::IsOptionSelected(int iOptIndex) {
+  CPDF_Object* pObj = FPDF_GetFieldAttr(m_pDict, "I");
+  if (!pObj) {
+    return FALSE;
+  }
+  CPDF_Array* pArray = pObj->GetArray();
+  if (!pArray) {
+    return FALSE;
+  }
+  int iCount = (int)pArray->GetCount();
+  for (int i = 0; i < iCount; i++) {
+    if (pArray->GetIntegerAt(i) == iOptIndex) {
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_FormField::SelectOption(int iOptIndex,
+                                     FX_BOOL bSelected,
+                                     FX_BOOL bNotify) {
+  CPDF_Array* pArray = m_pDict->GetArrayBy("I");
+  if (!pArray) {
+    if (!bSelected) {
+      return TRUE;
+    }
+    pArray = new CPDF_Array;
+    m_pDict->SetAt("I", pArray);
+  }
+  FX_BOOL bReturn = FALSE;
+  for (int i = 0; i < (int)pArray->GetCount(); i++) {
+    int iFind = pArray->GetIntegerAt(i);
+    if (iFind == iOptIndex) {
+      if (bSelected) {
+        return TRUE;
+      }
+      if (bNotify && m_pForm->m_pFormNotify) {
+        int iRet = 0;
+        CFX_WideString csValue = GetOptionLabel(iOptIndex);
+        if (GetType() == ListBox) {
+          iRet = m_pForm->m_pFormNotify->BeforeSelectionChange(this, csValue);
+        }
+        if (GetType() == ComboBox) {
+          iRet = m_pForm->m_pFormNotify->BeforeValueChange(this, csValue);
+        }
+        if (iRet < 0) {
+          return FALSE;
+        }
+      }
+      pArray->RemoveAt(i);
+      bReturn = TRUE;
+      break;
+    } else if (iFind > iOptIndex) {
+      if (!bSelected) {
+        continue;
+      }
+      if (bNotify && m_pForm->m_pFormNotify) {
+        int iRet = 0;
+        CFX_WideString csValue = GetOptionLabel(iOptIndex);
+        if (GetType() == ListBox) {
+          iRet = m_pForm->m_pFormNotify->BeforeSelectionChange(this, csValue);
+        }
+        if (GetType() == ComboBox) {
+          iRet = m_pForm->m_pFormNotify->BeforeValueChange(this, csValue);
+        }
+        if (iRet < 0) {
+          return FALSE;
+        }
+      }
+      CPDF_Number* pNum = new CPDF_Number(iOptIndex);
+      pArray->InsertAt(i, pNum);
+      bReturn = TRUE;
+      break;
+    }
+  }
+  if (!bReturn) {
+    if (bSelected) {
+      pArray->AddInteger(iOptIndex);
+    }
+    if (pArray->GetCount() == 0) {
+      m_pDict->RemoveAt("I");
+    }
+  }
+  if (bNotify && m_pForm->m_pFormNotify) {
+    if (GetType() == ListBox) {
+      m_pForm->m_pFormNotify->AfterSelectionChange(this);
+    }
+    if (GetType() == ComboBox) {
+      m_pForm->m_pFormNotify->AfterValueChange(this);
+    }
+  }
+  m_pForm->m_bUpdated = TRUE;
+  return TRUE;
+}
+FX_BOOL CPDF_FormField::ClearSelectedOptions(FX_BOOL bNotify) {
+  if (bNotify && m_pForm->m_pFormNotify) {
+    int iRet = 0;
+    CFX_WideString csValue;
+    int iIndex = GetSelectedIndex(0);
+    if (iIndex >= 0) {
+      csValue = GetOptionLabel(iIndex);
+    }
+    if (GetType() == ListBox) {
+      iRet = m_pForm->m_pFormNotify->BeforeSelectionChange(this, csValue);
+    }
+    if (GetType() == ComboBox) {
+      iRet = m_pForm->m_pFormNotify->BeforeValueChange(this, csValue);
+    }
+    if (iRet < 0) {
+      return FALSE;
+    }
+  }
+  m_pDict->RemoveAt("I");
+  if (bNotify && m_pForm->m_pFormNotify) {
+    if (GetType() == ListBox) {
+      m_pForm->m_pFormNotify->AfterSelectionChange(this);
+    }
+    if (GetType() == ComboBox) {
+      m_pForm->m_pFormNotify->AfterValueChange(this);
+    }
+  }
+  m_pForm->m_bUpdated = TRUE;
+  return TRUE;
+}
+void CPDF_FormField::LoadDA() {
+  CFX_ByteString DA;
+  if (CPDF_Object* pObj_t = FPDF_GetFieldAttr(m_pDict, "DA")) {
+    DA = pObj_t->GetString();
+  }
+  if (DA.IsEmpty() && m_pForm->m_pFormDict) {
+    DA = m_pForm->m_pFormDict->GetStringBy("DA");
+  }
+  if (DA.IsEmpty()) {
+    return;
+  }
+  CPDF_SimpleParser syntax(DA);
+  syntax.FindTagParamFromStart("Tf", 2);
+  CFX_ByteString font_name = syntax.GetWord();
+  CPDF_Dictionary* pFontDict = NULL;
+  if (m_pForm->m_pFormDict && m_pForm->m_pFormDict->GetDictBy("DR") &&
+      m_pForm->m_pFormDict->GetDictBy("DR")->GetDictBy("Font"))
+    pFontDict = m_pForm->m_pFormDict->GetDictBy("DR")
+                    ->GetDictBy("Font")
+                    ->GetDictBy(font_name);
+
+  if (!pFontDict) {
+    return;
+  }
+  m_pFont = m_pForm->m_pDocument->LoadFont(pFontDict);
+  m_FontSize = FX_atof(syntax.GetWord());
+}
diff --git a/core/fpdfdoc/doc_link.cpp b/core/fpdfdoc/doc_link.cpp
new file mode 100644
index 0000000000..8aedb40034
--- /dev/null
+++ b/core/fpdfdoc/doc_link.cpp
@@ -0,0 +1,92 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/include/fpdfdoc/fpdf_doc.h"
+
+#include <vector>
+
+#include "core/include/fpdfapi/cpdf_array.h"
+
+CPDF_LinkList::CPDF_LinkList() {}
+
+CPDF_LinkList::~CPDF_LinkList() {}
+
+const std::vector<CPDF_Dictionary*>* CPDF_LinkList::GetPageLinks(
+    CPDF_Page* pPage) {
+  FX_DWORD objnum = pPage->m_pFormDict->GetObjNum();
+  if (objnum == 0)
+    return nullptr;
+
+  auto it = m_PageMap.find(objnum);
+  if (it != m_PageMap.end())
+    return &it->second;
+
+  // std::map::operator[] forces the creation of a map entry.
+  std::vector<CPDF_Dictionary*>& page_link_list = m_PageMap[objnum];
+  LoadPageLinks(pPage, &page_link_list);
+  return &page_link_list;
+}
+
+CPDF_Link CPDF_LinkList::GetLinkAtPoint(CPDF_Page* pPage,
+                                        FX_FLOAT pdf_x,
+                                        FX_FLOAT pdf_y,
+                                        int* z_order) {
+  const std::vector<CPDF_Dictionary*>* pPageLinkList = GetPageLinks(pPage);
+  if (!pPageLinkList)
+    return CPDF_Link();
+
+  for (size_t i = pPageLinkList->size(); i > 0; --i) {
+    size_t annot_index = i - 1;
+    CPDF_Dictionary* pAnnot = (*pPageLinkList)[annot_index];
+    if (!pAnnot)
+      continue;
+
+    CPDF_Link link(pAnnot);
+    CFX_FloatRect rect = link.GetRect();
+    if (!rect.Contains(pdf_x, pdf_y))
+      continue;
+
+    if (z_order)
+      *z_order = annot_index;
+    return link;
+  }
+  return CPDF_Link();
+}
+
+void CPDF_LinkList::LoadPageLinks(CPDF_Page* pPage,
+                                  std::vector<CPDF_Dictionary*>* pList) {
+  CPDF_Array* pAnnotList = pPage->m_pFormDict->GetArrayBy("Annots");
+  if (!pAnnotList)
+    return;
+
+  for (FX_DWORD i = 0; i < pAnnotList->GetCount(); ++i) {
+    CPDF_Dictionary* pAnnot = pAnnotList->GetDictAt(i);
+    bool add_link = (pAnnot && pAnnot->GetStringBy("Subtype") == "Link");
+    // Add non-links as nullptrs to preserve z-order.
+    pList->push_back(add_link ? pAnnot : nullptr);
+  }
+}
+
+CFX_FloatRect CPDF_Link::GetRect() {
+  return m_pDict->GetRectBy("Rect");
+}
+CPDF_Dest CPDF_Link::GetDest(CPDF_Document* pDoc) {
+  CPDF_Object* pDest = m_pDict->GetElementValue("Dest");
+  if (!pDest)
+    return CPDF_Dest();
+
+  if (pDest->IsString() || pDest->IsName()) {
+    CPDF_NameTree name_tree(pDoc, "Dests");
+    CFX_ByteStringC name = pDest->GetString();
+    return CPDF_Dest(name_tree.LookupNamedDest(pDoc, name));
+  }
+  if (CPDF_Array* pArray = pDest->AsArray())
+    return CPDF_Dest(pArray);
+  return CPDF_Dest();
+}
+CPDF_Action CPDF_Link::GetAction() {
+  return CPDF_Action(m_pDict->GetDictBy("A"));
+}
diff --git a/core/fpdfdoc/doc_metadata.cpp b/core/fpdfdoc/doc_metadata.cpp
new file mode 100644
index 0000000000..78364c4cbf
--- /dev/null
+++ b/core/fpdfdoc/doc_metadata.cpp
@@ -0,0 +1,29 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+#include "core/include/fxcrt/fx_xml.h"
+
+CPDF_Metadata::CPDF_Metadata(CPDF_Document* pDoc) {
+  CPDF_Dictionary* pRoot = pDoc->GetRoot();
+  if (!pRoot)
+    return;
+
+  CPDF_Stream* pStream = pRoot->GetStreamBy("Metadata");
+  if (!pStream)
+    return;
+
+  CPDF_StreamAcc acc;
+  acc.LoadAllData(pStream, FALSE);
+  m_pXmlElement.reset(CXML_Element::Parse(acc.GetData(), acc.GetSize()));
+}
+
+CPDF_Metadata::~CPDF_Metadata() {}
+
+const CXML_Element* CPDF_Metadata::GetRoot() const {
+  return m_pXmlElement.get();
+}
diff --git a/core/fpdfdoc/doc_ocg.cpp b/core/fpdfdoc/doc_ocg.cpp
new file mode 100644
index 0000000000..3af745580c
--- /dev/null
+++ b/core/fpdfdoc/doc_ocg.cpp
@@ -0,0 +1,284 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+
+static int32_t FPDFDOC_OCG_FindGroup(const CPDF_Object* pObject,
+                                     const CPDF_Dictionary* pGroupDict) {
+  if (!pObject || !pGroupDict)
+    return -1;
+
+  if (const CPDF_Array* pArray = pObject->AsArray()) {
+    FX_DWORD dwCount = pArray->GetCount();
+    for (FX_DWORD i = 0; i < dwCount; i++) {
+      if (pArray->GetDictAt(i) == pGroupDict)
+        return i;
+    }
+    return -1;
+  }
+  return pObject->GetDict() == pGroupDict ? 0 : -1;
+}
+static FX_BOOL FPDFDOC_OCG_HasIntent(const CPDF_Dictionary* pDict,
+                                     const CFX_ByteStringC& csElement,
+                                     const CFX_ByteStringC& csDef = "") {
+  CPDF_Object* pIntent = pDict->GetElementValue("Intent");
+  if (!pIntent) {
+    return csElement == csDef;
+  }
+  CFX_ByteString bsIntent;
+  if (CPDF_Array* pArray = pIntent->AsArray()) {
+    FX_DWORD dwCount = pArray->GetCount();
+    for (FX_DWORD i = 0; i < dwCount; i++) {
+      bsIntent = pArray->GetStringAt(i);
+      if (bsIntent == "All" || bsIntent == csElement)
+        return TRUE;
+    }
+    return FALSE;
+  }
+  bsIntent = pIntent->GetString();
+  return bsIntent == "All" || bsIntent == csElement;
+}
+static CPDF_Dictionary* FPDFDOC_OCG_GetConfig(CPDF_Document* pDoc,
+                                              const CPDF_Dictionary* pOCGDict,
+                                              const CFX_ByteStringC& bsState) {
+  FXSYS_assert(pDoc && pOCGDict);
+  CPDF_Dictionary* pOCProperties = pDoc->GetRoot()->GetDictBy("OCProperties");
+  if (!pOCProperties) {
+    return NULL;
+  }
+  CPDF_Array* pOCGs = pOCProperties->GetArrayBy("OCGs");
+  if (!pOCGs) {
+    return NULL;
+  }
+  if (FPDFDOC_OCG_FindGroup(pOCGs, pOCGDict) < 0) {
+    return NULL;
+  }
+  CPDF_Dictionary* pConfig = pOCProperties->GetDictBy("D");
+  CPDF_Array* pConfigs = pOCProperties->GetArrayBy("Configs");
+  if (pConfigs) {
+    CPDF_Dictionary* pFind;
+    int32_t iCount = pConfigs->GetCount();
+    for (int32_t i = 0; i < iCount; i++) {
+      pFind = pConfigs->GetDictAt(i);
+      if (!pFind) {
+        continue;
+      }
+      if (!FPDFDOC_OCG_HasIntent(pFind, "View", "View")) {
+        continue;
+      }
+      pConfig = pFind;
+      break;
+    }
+  }
+  return pConfig;
+}
+static CFX_ByteString FPDFDOC_OCG_GetUsageTypeString(
+    CPDF_OCContext::UsageType eType) {
+  CFX_ByteString csState = "View";
+  if (eType == CPDF_OCContext::Design) {
+    csState = "Design";
+  } else if (eType == CPDF_OCContext::Print) {
+    csState = "Print";
+  } else if (eType == CPDF_OCContext::Export) {
+    csState = "Export";
+  }
+  return csState;
+}
+CPDF_OCContext::CPDF_OCContext(CPDF_Document* pDoc, UsageType eUsageType) {
+  FXSYS_assert(pDoc);
+  m_pDocument = pDoc;
+  m_eUsageType = eUsageType;
+}
+CPDF_OCContext::~CPDF_OCContext() {
+  m_OCGStates.clear();
+}
+FX_BOOL CPDF_OCContext::LoadOCGStateFromConfig(const CFX_ByteStringC& csConfig,
+                                               const CPDF_Dictionary* pOCGDict,
+                                               FX_BOOL& bValidConfig) const {
+  CPDF_Dictionary* pConfig =
+      FPDFDOC_OCG_GetConfig(m_pDocument, pOCGDict, csConfig);
+  if (!pConfig) {
+    return TRUE;
+  }
+  bValidConfig = TRUE;
+  FX_BOOL bState = pConfig->GetStringBy("BaseState", "ON") != "OFF";
+  CPDF_Array* pArray = pConfig->GetArrayBy("ON");
+  if (pArray) {
+    if (FPDFDOC_OCG_FindGroup(pArray, pOCGDict) >= 0) {
+      bState = TRUE;
+    }
+  }
+  pArray = pConfig->GetArrayBy("OFF");
+  if (pArray) {
+    if (FPDFDOC_OCG_FindGroup(pArray, pOCGDict) >= 0) {
+      bState = FALSE;
+    }
+  }
+  pArray = pConfig->GetArrayBy("AS");
+  if (pArray) {
+    CFX_ByteString csFind = csConfig + "State";
+    int32_t iCount = pArray->GetCount();
+    for (int32_t i = 0; i < iCount; i++) {
+      CPDF_Dictionary* pUsage = pArray->GetDictAt(i);
+      if (!pUsage) {
+        continue;
+      }
+      if (pUsage->GetStringBy("Event", "View") != csConfig) {
+        continue;
+      }
+      CPDF_Array* pOCGs = pUsage->GetArrayBy("OCGs");
+      if (!pOCGs) {
+        continue;
+      }
+      if (FPDFDOC_OCG_FindGroup(pOCGs, pOCGDict) < 0) {
+        continue;
+      }
+      CPDF_Dictionary* pState = pUsage->GetDictBy(csConfig);
+      if (!pState) {
+        continue;
+      }
+      bState = pState->GetStringBy(csFind) != "OFF";
+    }
+  }
+  return bState;
+}
+FX_BOOL CPDF_OCContext::LoadOCGState(const CPDF_Dictionary* pOCGDict) const {
+  if (!FPDFDOC_OCG_HasIntent(pOCGDict, "View", "View")) {
+    return TRUE;
+  }
+  CFX_ByteString csState = FPDFDOC_OCG_GetUsageTypeString(m_eUsageType);
+  CPDF_Dictionary* pUsage = pOCGDict->GetDictBy("Usage");
+  if (pUsage) {
+    CPDF_Dictionary* pState = pUsage->GetDictBy(csState);
+    if (pState) {
+      CFX_ByteString csFind = csState + "State";
+      if (pState->KeyExist(csFind)) {
+        return pState->GetStringBy(csFind) != "OFF";
+      }
+    }
+    if (csState != "View") {
+      pState = pUsage->GetDictBy("View");
+      if (pState && pState->KeyExist("ViewState")) {
+        return pState->GetStringBy("ViewState") != "OFF";
+      }
+    }
+  }
+  FX_BOOL bDefValid = FALSE;
+  return LoadOCGStateFromConfig(csState, pOCGDict, bDefValid);
+}
+
+FX_BOOL CPDF_OCContext::GetOCGVisible(const CPDF_Dictionary* pOCGDict) {
+  if (!pOCGDict)
+    return FALSE;
+
+  const auto it = m_OCGStates.find(pOCGDict);
+  if (it != m_OCGStates.end())
+    return it->second;
+
+  FX_BOOL bState = LoadOCGState(pOCGDict);
+  m_OCGStates[pOCGDict] = bState;
+  return bState;
+}
+
+FX_BOOL CPDF_OCContext::GetOCGVE(CPDF_Array* pExpression,
+                                 FX_BOOL bFromConfig,
+                                 int nLevel) {
+  if (nLevel > 32) {
+    return FALSE;
+  }
+  if (!pExpression) {
+    return FALSE;
+  }
+  int32_t iCount = pExpression->GetCount();
+  CPDF_Object* pOCGObj;
+  CFX_ByteString csOperator = pExpression->GetStringAt(0);
+  if (csOperator == "Not") {
+    pOCGObj = pExpression->GetElementValue(1);
+    if (!pOCGObj)
+      return FALSE;
+    if (CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
+      return !(bFromConfig ? LoadOCGState(pDict) : GetOCGVisible(pDict));
+    if (CPDF_Array* pArray = pOCGObj->AsArray())
+      return !GetOCGVE(pArray, bFromConfig, nLevel + 1);
+    return FALSE;
+  }
+  if (csOperator == "Or" || csOperator == "And") {
+    FX_BOOL bValue = FALSE;
+    for (int32_t i = 1; i < iCount; i++) {
+      pOCGObj = pExpression->GetElementValue(1);
+      if (!pOCGObj) {
+        continue;
+      }
+      FX_BOOL bItem = FALSE;
+      if (CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
+        bItem = bFromConfig ? LoadOCGState(pDict) : GetOCGVisible(pDict);
+      else if (CPDF_Array* pArray = pOCGObj->AsArray())
+        bItem = GetOCGVE(pArray, bFromConfig, nLevel + 1);
+
+      if (i == 1) {
+        bValue = bItem;
+      } else {
+        if (csOperator == "Or") {
+          bValue = bValue || bItem;
+        } else {
+          bValue = bValue && bItem;
+        }
+      }
+    }
+    return bValue;
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_OCContext::LoadOCMDState(const CPDF_Dictionary* pOCMDDict,
+                                      FX_BOOL bFromConfig) {
+  CPDF_Array* pVE = pOCMDDict->GetArrayBy("VE");
+  if (pVE) {
+    return GetOCGVE(pVE, bFromConfig);
+  }
+  CFX_ByteString csP = pOCMDDict->GetStringBy("P", "AnyOn");
+  CPDF_Object* pOCGObj = pOCMDDict->GetElementValue("OCGs");
+  if (!pOCGObj)
+    return TRUE;
+  if (const CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
+    return bFromConfig ? LoadOCGState(pDict) : GetOCGVisible(pDict);
+
+  CPDF_Array* pArray = pOCGObj->AsArray();
+  if (!pArray)
+    return TRUE;
+
+  FX_BOOL bState = FALSE;
+  if (csP == "AllOn" || csP == "AllOff") {
+    bState = TRUE;
+  }
+  int32_t iCount = pArray->GetCount();
+  for (int32_t i = 0; i < iCount; i++) {
+    FX_BOOL bItem = TRUE;
+    CPDF_Dictionary* pItemDict = pArray->GetDictAt(i);
+    if (pItemDict)
+      bItem = bFromConfig ? LoadOCGState(pItemDict) : GetOCGVisible(pItemDict);
+
+    if ((csP == "AnyOn" && bItem) || (csP == "AnyOff" && !bItem))
+      return TRUE;
+    if ((csP == "AllOn" && !bItem) || (csP == "AllOff" && bItem))
+      return FALSE;
+  }
+  return bState;
+}
+FX_BOOL CPDF_OCContext::CheckOCGVisible(const CPDF_Dictionary* pOCGDict) {
+  if (!pOCGDict) {
+    return TRUE;
+  }
+  CFX_ByteString csType = pOCGDict->GetStringBy("Type", "OCG");
+  if (csType == "OCG") {
+    return GetOCGVisible(pOCGDict);
+  }
+  return LoadOCMDState(pOCGDict, FALSE);
+}
+void CPDF_OCContext::ResetOCContext() {
+  m_OCGStates.clear();
+}
diff --git a/core/fpdfdoc/doc_tagged.cpp b/core/fpdfdoc/doc_tagged.cpp
new file mode 100644
index 0000000000..015f4db878
--- /dev/null
+++ b/core/fpdfdoc/doc_tagged.cpp
@@ -0,0 +1,440 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include <map>
+
+#include "core/fpdfdoc/doc_utils.h"
+#include "core/fpdfdoc/tagged_int.h"
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_dictionary.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfapi/cpdf_reference.h"
+#include "core/include/fpdfapi/fpdf_page.h"
+#include "core/include/fpdfdoc/fpdf_tagged.h"
+
+const int nMaxRecursion = 32;
+static FX_BOOL IsTagged(const CPDF_Document* pDoc) {
+  CPDF_Dictionary* pCatalog = pDoc->GetRoot();
+  CPDF_Dictionary* pMarkInfo = pCatalog->GetDictBy("MarkInfo");
+  return pMarkInfo && pMarkInfo->GetIntegerBy("Marked");
+}
+CPDF_StructTree* CPDF_StructTree::LoadPage(const CPDF_Document* pDoc,
+                                           const CPDF_Dictionary* pPageDict) {
+  if (!IsTagged(pDoc)) {
+    return NULL;
+  }
+  CPDF_StructTreeImpl* pTree = new CPDF_StructTreeImpl(pDoc);
+  pTree->LoadPageTree(pPageDict);
+  return pTree;
+}
+CPDF_StructTree* CPDF_StructTree::LoadDoc(const CPDF_Document* pDoc) {
+  if (!IsTagged(pDoc)) {
+    return NULL;
+  }
+  CPDF_StructTreeImpl* pTree = new CPDF_StructTreeImpl(pDoc);
+  pTree->LoadDocTree();
+  return pTree;
+}
+CPDF_StructTreeImpl::CPDF_StructTreeImpl(const CPDF_Document* pDoc) {
+  CPDF_Dictionary* pCatalog = pDoc->GetRoot();
+  m_pTreeRoot = pCatalog->GetDictBy("StructTreeRoot");
+  if (!m_pTreeRoot) {
+    return;
+  }
+  m_pRoleMap = m_pTreeRoot->GetDictBy("RoleMap");
+}
+CPDF_StructTreeImpl::~CPDF_StructTreeImpl() {
+  for (int i = 0; i < m_Kids.GetSize(); i++)
+    if (m_Kids[i]) {
+      m_Kids[i]->Release();
+    }
+}
+void CPDF_StructTreeImpl::LoadDocTree() {
+  m_pPage = nullptr;
+  if (!m_pTreeRoot)
+    return;
+
+  CPDF_Object* pKids = m_pTreeRoot->GetElementValue("K");
+  if (!pKids)
+    return;
+  if (CPDF_Dictionary* pDict = pKids->AsDictionary()) {
+    CPDF_StructElementImpl* pStructElementImpl =
+        new CPDF_StructElementImpl(this, nullptr, pDict);
+    m_Kids.Add(pStructElementImpl);
+    return;
+  }
+  CPDF_Array* pArray = pKids->AsArray();
+  if (!pArray)
+    return;
+
+  for (FX_DWORD i = 0; i < pArray->GetCount(); i++) {
+    CPDF_Dictionary* pKid = pArray->GetDictAt(i);
+    CPDF_StructElementImpl* pStructElementImpl =
+        new CPDF_StructElementImpl(this, nullptr, pKid);
+    m_Kids.Add(pStructElementImpl);
+  }
+}
+void CPDF_StructTreeImpl::LoadPageTree(const CPDF_Dictionary* pPageDict) {
+  m_pPage = pPageDict;
+  if (!m_pTreeRoot)
+    return;
+
+  CPDF_Object* pKids = m_pTreeRoot->GetElementValue("K");
+  if (!pKids)
+    return;
+
+  FX_DWORD dwKids = 0;
+  if (pKids->IsDictionary())
+    dwKids = 1;
+  else if (CPDF_Array* pArray = pKids->AsArray())
+    dwKids = pArray->GetCount();
+  else
+    return;
+
+  FX_DWORD i;
+  m_Kids.SetSize(dwKids);
+  for (i = 0; i < dwKids; i++) {
+    m_Kids[i] = NULL;
+  }
+  std::map<CPDF_Dictionary*, CPDF_StructElementImpl*> element_map;
+  CPDF_Dictionary* pParentTree = m_pTreeRoot->GetDictBy("ParentTree");
+  if (!pParentTree) {
+    return;
+  }
+  CPDF_NumberTree parent_tree(pParentTree);
+  int parents_id = pPageDict->GetIntegerBy("StructParents", -1);
+  if (parents_id >= 0) {
+    CPDF_Array* pParentArray = ToArray(parent_tree.LookupValue(parents_id));
+    if (!pParentArray)
+      return;
+
+    for (i = 0; i < pParentArray->GetCount(); i++) {
+      CPDF_Dictionary* pParent = pParentArray->GetDictAt(i);
+      if (!pParent) {
+        continue;
+      }
+      AddPageNode(pParent, element_map);
+    }
+  }
+}
+CPDF_StructElementImpl* CPDF_StructTreeImpl::AddPageNode(
+    CPDF_Dictionary* pDict,
+    std::map<CPDF_Dictionary*, CPDF_StructElementImpl*>& map,
+    int nLevel) {
+  if (nLevel > nMaxRecursion)
+    return NULL;
+
+  auto it = map.find(pDict);
+  if (it != map.end())
+    return it->second;
+
+  CPDF_StructElementImpl* pElement =
+      new CPDF_StructElementImpl(this, NULL, pDict);
+  map[pDict] = pElement;
+  CPDF_Dictionary* pParent = pDict->GetDictBy("P");
+  if (!pParent || pParent->GetStringBy("Type") == "StructTreeRoot") {
+    if (!AddTopLevelNode(pDict, pElement)) {
+      pElement->Release();
+      map.erase(pDict);
+    }
+  } else {
+    CPDF_StructElementImpl* pParentElement =
+        AddPageNode(pParent, map, nLevel + 1);
+    FX_BOOL bSave = FALSE;
+    for (int i = 0; i < pParentElement->m_Kids.GetSize(); i++) {
+      if (pParentElement->m_Kids[i].m_Type != CPDF_StructKid::Element) {
+        continue;
+      }
+      if (pParentElement->m_Kids[i].m_Element.m_pDict != pDict) {
+        continue;
+      }
+      pParentElement->m_Kids[i].m_Element.m_pElement = pElement->Retain();
+      bSave = TRUE;
+    }
+    if (!bSave) {
+      pElement->Release();
+      map.erase(pDict);
+    }
+  }
+  return pElement;
+}
+FX_BOOL CPDF_StructTreeImpl::AddTopLevelNode(CPDF_Dictionary* pDict,
+                                             CPDF_StructElementImpl* pElement) {
+  CPDF_Object* pObj = m_pTreeRoot->GetElementValue("K");
+  if (!pObj) {
+    return FALSE;
+  }
+  if (pObj->IsDictionary()) {
+    if (pObj->GetObjNum() == pDict->GetObjNum()) {
+      if (m_Kids[0]) {
+        m_Kids[0]->Release();
+      }
+      m_Kids[0] = pElement->Retain();
+    } else {
+      return FALSE;
+    }
+  }
+  if (CPDF_Array* pTopKids = pObj->AsArray()) {
+    FX_DWORD i;
+    FX_BOOL bSave = FALSE;
+    for (i = 0; i < pTopKids->GetCount(); i++) {
+      CPDF_Reference* pKidRef = ToReference(pTopKids->GetElement(i));
+      if (!pKidRef)
+        continue;
+      if (pKidRef->GetRefObjNum() != pDict->GetObjNum())
+        continue;
+
+      if (m_Kids[i])
+        m_Kids[i]->Release();
+      m_Kids[i] = pElement->Retain();
+      bSave = TRUE;
+    }
+    if (!bSave)
+      return FALSE;
+  }
+  return TRUE;
+}
+CPDF_StructElementImpl::CPDF_StructElementImpl(CPDF_StructTreeImpl* pTree,
+                                               CPDF_StructElementImpl* pParent,
+                                               CPDF_Dictionary* pDict)
+    : m_RefCount(0) {
+  m_pTree = pTree;
+  m_pDict = pDict;
+  m_Type = pDict->GetStringBy("S");
+  if (pTree->m_pRoleMap) {
+    CFX_ByteString mapped = pTree->m_pRoleMap->GetStringBy(m_Type);
+    if (!mapped.IsEmpty()) {
+      m_Type = mapped;
+    }
+  }
+  m_pParent = pParent;
+  LoadKids(pDict);
+}
+CPDF_StructElementImpl::~CPDF_StructElementImpl() {
+  for (int i = 0; i < m_Kids.GetSize(); i++) {
+    if (m_Kids[i].m_Type == CPDF_StructKid::Element &&
+        m_Kids[i].m_Element.m_pElement) {
+      ((CPDF_StructElementImpl*)m_Kids[i].m_Element.m_pElement)->Release();
+    }
+  }
+}
+CPDF_StructElementImpl* CPDF_StructElementImpl::Retain() {
+  m_RefCount++;
+  return this;
+}
+void CPDF_StructElementImpl::Release() {
+  if (--m_RefCount < 1) {
+    delete this;
+  }
+}
+void CPDF_StructElementImpl::LoadKids(CPDF_Dictionary* pDict) {
+  CPDF_Object* pObj = pDict->GetElement("Pg");
+  FX_DWORD PageObjNum = 0;
+  if (CPDF_Reference* pRef = ToReference(pObj))
+    PageObjNum = pRef->GetRefObjNum();
+
+  CPDF_Object* pKids = pDict->GetElementValue("K");
+  if (!pKids)
+    return;
+
+  if (CPDF_Array* pArray = pKids->AsArray()) {
+    m_Kids.SetSize(pArray->GetCount());
+    for (FX_DWORD i = 0; i < pArray->GetCount(); i++) {
+      CPDF_Object* pKid = pArray->GetElementValue(i);
+      LoadKid(PageObjNum, pKid, &m_Kids[i]);
+    }
+  } else {
+    m_Kids.SetSize(1);
+    LoadKid(PageObjNum, pKids, &m_Kids[0]);
+  }
+}
+void CPDF_StructElementImpl::LoadKid(FX_DWORD PageObjNum,
+                                     CPDF_Object* pKidObj,
+                                     CPDF_StructKid* pKid) {
+  pKid->m_Type = CPDF_StructKid::Invalid;
+  if (!pKidObj)
+    return;
+
+  if (pKidObj->IsNumber()) {
+    if (m_pTree->m_pPage && m_pTree->m_pPage->GetObjNum() != PageObjNum) {
+      return;
+    }
+    pKid->m_Type = CPDF_StructKid::PageContent;
+    pKid->m_PageContent.m_ContentId = pKidObj->GetInteger();
+    pKid->m_PageContent.m_PageObjNum = PageObjNum;
+    return;
+  }
+
+  CPDF_Dictionary* pKidDict = pKidObj->AsDictionary();
+  if (!pKidDict)
+    return;
+
+  if (CPDF_Reference* pRef = ToReference(pKidDict->GetElement("Pg")))
+    PageObjNum = pRef->GetRefObjNum();
+
+  CFX_ByteString type = pKidDict->GetStringBy("Type");
+  if (type == "MCR") {
+    if (m_pTree->m_pPage && m_pTree->m_pPage->GetObjNum() != PageObjNum) {
+      return;
+    }
+    pKid->m_Type = CPDF_StructKid::StreamContent;
+    if (CPDF_Reference* pRef = ToReference(pKidDict->GetElement("Stm"))) {
+      pKid->m_StreamContent.m_RefObjNum = pRef->GetRefObjNum();
+    } else {
+      pKid->m_StreamContent.m_RefObjNum = 0;
+    }
+    pKid->m_StreamContent.m_PageObjNum = PageObjNum;
+    pKid->m_StreamContent.m_ContentId = pKidDict->GetIntegerBy("MCID");
+  } else if (type == "OBJR") {
+    if (m_pTree->m_pPage && m_pTree->m_pPage->GetObjNum() != PageObjNum) {
+      return;
+    }
+    pKid->m_Type = CPDF_StructKid::Object;
+    if (CPDF_Reference* pObj = ToReference(pKidDict->GetElement("Obj"))) {
+      pKid->m_Object.m_RefObjNum = pObj->GetRefObjNum();
+    } else {
+      pKid->m_Object.m_RefObjNum = 0;
+    }
+    pKid->m_Object.m_PageObjNum = PageObjNum;
+  } else {
+    pKid->m_Type = CPDF_StructKid::Element;
+    pKid->m_Element.m_pDict = pKidDict;
+    if (!m_pTree->m_pPage) {
+      pKid->m_Element.m_pElement =
+          new CPDF_StructElementImpl(m_pTree, this, pKidDict);
+    } else {
+      pKid->m_Element.m_pElement = NULL;
+    }
+  }
+}
+static CPDF_Dictionary* FindAttrDict(CPDF_Object* pAttrs,
+                                     const CFX_ByteStringC& owner,
+                                     FX_FLOAT nLevel = 0.0F) {
+  if (nLevel > nMaxRecursion)
+    return nullptr;
+  if (!pAttrs)
+    return nullptr;
+
+  CPDF_Dictionary* pDict = nullptr;
+  if (pAttrs->IsDictionary()) {
+    pDict = pAttrs->AsDictionary();
+  } else if (CPDF_Stream* pStream = pAttrs->AsStream()) {
+    pDict = pStream->GetDict();
+  } else if (CPDF_Array* pArray = pAttrs->AsArray()) {
+    for (FX_DWORD i = 0; i < pArray->GetCount(); i++) {
+      CPDF_Object* pElement = pArray->GetElementValue(i);
+      pDict = FindAttrDict(pElement, owner, nLevel + 1);
+      if (pDict)
+        return pDict;
+    }
+  }
+  if (pDict && pDict->GetStringBy("O") == owner)
+    return pDict;
+  return nullptr;
+}
+CPDF_Object* CPDF_StructElementImpl::GetAttr(const CFX_ByteStringC& owner,
+                                             const CFX_ByteStringC& name,
+                                             FX_BOOL bInheritable,
+                                             FX_FLOAT fLevel) {
+  if (fLevel > nMaxRecursion) {
+    return NULL;
+  }
+  if (bInheritable) {
+    CPDF_Object* pAttr = GetAttr(owner, name, FALSE);
+    if (pAttr) {
+      return pAttr;
+    }
+    if (!m_pParent) {
+      return NULL;
+    }
+    return m_pParent->GetAttr(owner, name, TRUE, fLevel + 1);
+  }
+  CPDF_Object* pA = m_pDict->GetElementValue("A");
+  if (pA) {
+    CPDF_Dictionary* pAttrDict = FindAttrDict(pA, owner);
+    if (pAttrDict) {
+      CPDF_Object* pAttr = pAttrDict->GetElementValue(name);
+      if (pAttr) {
+        return pAttr;
+      }
+    }
+  }
+  CPDF_Object* pC = m_pDict->GetElementValue("C");
+  if (!pC)
+    return nullptr;
+
+  CPDF_Dictionary* pClassMap = m_pTree->m_pTreeRoot->GetDictBy("ClassMap");
+  if (!pClassMap)
+    return nullptr;
+
+  if (CPDF_Array* pArray = pC->AsArray()) {
+    for (FX_DWORD i = 0; i < pArray->GetCount(); i++) {
+      CFX_ByteString class_name = pArray->GetStringAt(i);
+      CPDF_Dictionary* pClassDict = pClassMap->GetDictBy(class_name);
+      if (pClassDict && pClassDict->GetStringBy("O") == owner)
+        return pClassDict->GetElementValue(name);
+    }
+    return nullptr;
+  }
+  CFX_ByteString class_name = pC->GetString();
+  CPDF_Dictionary* pClassDict = pClassMap->GetDictBy(class_name);
+  if (pClassDict && pClassDict->GetStringBy("O") == owner)
+    return pClassDict->GetElementValue(name);
+  return nullptr;
+}
+CPDF_Object* CPDF_StructElementImpl::GetAttr(const CFX_ByteStringC& owner,
+                                             const CFX_ByteStringC& name,
+                                             FX_BOOL bInheritable,
+                                             int subindex) {
+  CPDF_Object* pAttr = GetAttr(owner, name, bInheritable);
+  CPDF_Array* pArray = ToArray(pAttr);
+  if (!pArray || subindex == -1)
+    return pAttr;
+
+  if (subindex >= static_cast<int>(pArray->GetCount()))
+    return pAttr;
+  return pArray->GetElementValue(subindex);
+}
+CFX_ByteString CPDF_StructElementImpl::GetName(
+    const CFX_ByteStringC& owner,
+    const CFX_ByteStringC& name,
+    const CFX_ByteStringC& default_value,
+    FX_BOOL bInheritable,
+    int subindex) {
+  CPDF_Object* pAttr = GetAttr(owner, name, bInheritable, subindex);
+  if (ToName(pAttr))
+    return pAttr->GetString();
+  return default_value;
+}
+
+FX_ARGB CPDF_StructElementImpl::GetColor(const CFX_ByteStringC& owner,
+                                         const CFX_ByteStringC& name,
+                                         FX_ARGB default_value,
+                                         FX_BOOL bInheritable,
+                                         int subindex) {
+  CPDF_Array* pArray = ToArray(GetAttr(owner, name, bInheritable, subindex));
+  if (!pArray)
+    return default_value;
+  return 0xff000000 | ((int)(pArray->GetNumberAt(0) * 255) << 16) |
+         ((int)(pArray->GetNumberAt(1) * 255) << 8) |
+         (int)(pArray->GetNumberAt(2) * 255);
+}
+FX_FLOAT CPDF_StructElementImpl::GetNumber(const CFX_ByteStringC& owner,
+                                           const CFX_ByteStringC& name,
+                                           FX_FLOAT default_value,
+                                           FX_BOOL bInheritable,
+                                           int subindex) {
+  CPDF_Object* pAttr = GetAttr(owner, name, bInheritable, subindex);
+  return ToNumber(pAttr) ? pAttr->GetNumber() : default_value;
+}
+int CPDF_StructElementImpl::GetInteger(const CFX_ByteStringC& owner,
+                                       const CFX_ByteStringC& name,
+                                       int default_value,
+                                       FX_BOOL bInheritable,
+                                       int subindex) {
+  CPDF_Object* pAttr = GetAttr(owner, name, bInheritable, subindex);
+  return ToNumber(pAttr) ? pAttr->GetInteger() : default_value;
+}
diff --git a/core/fpdfdoc/doc_utils.cpp b/core/fpdfdoc/doc_utils.cpp
new file mode 100644
index 0000000000..5160c1115c
--- /dev/null
+++ b/core/fpdfdoc/doc_utils.cpp
@@ -0,0 +1,753 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include <algorithm>
+#include <vector>
+
+#include "core/fpdfdoc/doc_utils.h"
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfapi/cpdf_simple_parser.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+
+namespace {
+
+const int FPDFDOC_UTILS_MAXRECURSION = 32;
+
+CPDF_Object* SearchNumberNode(const CPDF_Dictionary* pNode, int num) {
+  CPDF_Array* pLimits = pNode->GetArrayBy("Limits");
+  if (pLimits &&
+      (num < pLimits->GetIntegerAt(0) || num > pLimits->GetIntegerAt(1))) {
+    return NULL;
+  }
+  CPDF_Array* pNumbers = pNode->GetArrayBy("Nums");
+  if (pNumbers) {
+    FX_DWORD dwCount = pNumbers->GetCount() / 2;
+    for (FX_DWORD i = 0; i < dwCount; i++) {
+      int index = pNumbers->GetIntegerAt(i * 2);
+      if (num == index) {
+        return pNumbers->GetElementValue(i * 2 + 1);
+      }
+      if (index > num) {
+        break;
+      }
+    }
+    return NULL;
+  }
+  CPDF_Array* pKids = pNode->GetArrayBy("Kids");
+  if (!pKids) {
+    return NULL;
+  }
+  for (FX_DWORD i = 0; i < pKids->GetCount(); i++) {
+    CPDF_Dictionary* pKid = pKids->GetDictAt(i);
+    if (!pKid) {
+      continue;
+    }
+    CPDF_Object* pFound = SearchNumberNode(pKid, num);
+    if (pFound) {
+      return pFound;
+    }
+  }
+  return NULL;
+}
+
+}  // namespace
+
+CPDF_Object* CPDF_NumberTree::LookupValue(int num) const {
+  return SearchNumberNode(m_pRoot, num);
+}
+
+CFX_WideString GetFullName(CPDF_Dictionary* pFieldDict) {
+  CFX_WideString full_name;
+  CPDF_Dictionary* pLevel = pFieldDict;
+  while (pLevel) {
+    CFX_WideString short_name = pLevel->GetUnicodeTextBy("T");
+    if (short_name != L"") {
+      if (full_name == L"") {
+        full_name = short_name;
+      } else {
+        full_name = short_name + L"." + full_name;
+      }
+    }
+    pLevel = pLevel->GetDictBy("Parent");
+  }
+  return full_name;
+}
+FX_BOOL CPDF_DefaultAppearance::HasFont() {
+  if (m_csDA.IsEmpty()) {
+    return FALSE;
+  }
+  CPDF_SimpleParser syntax(m_csDA);
+  return syntax.FindTagParamFromStart("Tf", 2);
+}
+CFX_ByteString CPDF_DefaultAppearance::GetFontString() {
+  CFX_ByteString csFont;
+  if (m_csDA.IsEmpty()) {
+    return csFont;
+  }
+  CPDF_SimpleParser syntax(m_csDA);
+  if (syntax.FindTagParamFromStart("Tf", 2)) {
+    csFont += (CFX_ByteString)syntax.GetWord();
+    csFont += " ";
+    csFont += (CFX_ByteString)syntax.GetWord();
+    csFont += " ";
+    csFont += (CFX_ByteString)syntax.GetWord();
+  }
+  return csFont;
+}
+void CPDF_DefaultAppearance::GetFont(CFX_ByteString& csFontNameTag,
+                                     FX_FLOAT& fFontSize) {
+  csFontNameTag = "";
+  fFontSize = 0;
+  if (m_csDA.IsEmpty()) {
+    return;
+  }
+  CPDF_SimpleParser syntax(m_csDA);
+  if (syntax.FindTagParamFromStart("Tf", 2)) {
+    csFontNameTag = (CFX_ByteString)syntax.GetWord();
+    csFontNameTag.Delete(0, 1);
+    fFontSize = FX_atof((CFX_ByteString)syntax.GetWord());
+  }
+  csFontNameTag = PDF_NameDecode(csFontNameTag);
+}
+FX_BOOL CPDF_DefaultAppearance::HasColor(FX_BOOL bStrokingOperation) {
+  if (m_csDA.IsEmpty()) {
+    return FALSE;
+  }
+  CPDF_SimpleParser syntax(m_csDA);
+  if (syntax.FindTagParamFromStart(bStrokingOperation ? "G" : "g", 1)) {
+    return TRUE;
+  }
+  if (syntax.FindTagParamFromStart(bStrokingOperation ? "RG" : "rg", 3)) {
+    return TRUE;
+  }
+  return syntax.FindTagParamFromStart(bStrokingOperation ? "K" : "k", 4);
+}
+CFX_ByteString CPDF_DefaultAppearance::GetColorString(
+    FX_BOOL bStrokingOperation) {
+  CFX_ByteString csColor;
+  if (m_csDA.IsEmpty()) {
+    return csColor;
+  }
+  CPDF_SimpleParser syntax(m_csDA);
+  if (syntax.FindTagParamFromStart(bStrokingOperation ? "G" : "g", 1)) {
+    csColor += (CFX_ByteString)syntax.GetWord();
+    csColor += " ";
+    csColor += (CFX_ByteString)syntax.GetWord();
+    return csColor;
+  }
+  if (syntax.FindTagParamFromStart(bStrokingOperation ? "RG" : "rg", 3)) {
+    csColor += (CFX_ByteString)syntax.GetWord();
+    csColor += " ";
+    csColor += (CFX_ByteString)syntax.GetWord();
+    csColor += " ";
+    csColor += (CFX_ByteString)syntax.GetWord();
+    csColor += " ";
+    csColor += (CFX_ByteString)syntax.GetWord();
+    return csColor;
+  }
+  if (syntax.FindTagParamFromStart(bStrokingOperation ? "K" : "k", 4)) {
+    csColor += (CFX_ByteString)syntax.GetWord();
+    csColor += " ";
+    csColor += (CFX_ByteString)syntax.GetWord();
+    csColor += " ";
+    csColor += (CFX_ByteString)syntax.GetWord();
+    csColor += " ";
+    csColor += (CFX_ByteString)syntax.GetWord();
+    csColor += " ";
+    csColor += (CFX_ByteString)syntax.GetWord();
+  }
+  return csColor;
+}
+void CPDF_DefaultAppearance::GetColor(int& iColorType,
+                                      FX_FLOAT fc[4],
+                                      FX_BOOL bStrokingOperation) {
+  iColorType = COLORTYPE_TRANSPARENT;
+  for (int c = 0; c < 4; c++) {
+    fc[c] = 0;
+  }
+  if (m_csDA.IsEmpty()) {
+    return;
+  }
+  CPDF_SimpleParser syntax(m_csDA);
+  if (syntax.FindTagParamFromStart(bStrokingOperation ? "G" : "g", 1)) {
+    iColorType = COLORTYPE_GRAY;
+    fc[0] = FX_atof((CFX_ByteString)syntax.GetWord());
+    return;
+  }
+  if (syntax.FindTagParamFromStart(bStrokingOperation ? "RG" : "rg", 3)) {
+    iColorType = COLORTYPE_RGB;
+    fc[0] = FX_atof((CFX_ByteString)syntax.GetWord());
+    fc[1] = FX_atof((CFX_ByteString)syntax.GetWord());
+    fc[2] = FX_atof((CFX_ByteString)syntax.GetWord());
+    return;
+  }
+  if (syntax.FindTagParamFromStart(bStrokingOperation ? "K" : "k", 4)) {
+    iColorType = COLORTYPE_CMYK;
+    fc[0] = FX_atof((CFX_ByteString)syntax.GetWord());
+    fc[1] = FX_atof((CFX_ByteString)syntax.GetWord());
+    fc[2] = FX_atof((CFX_ByteString)syntax.GetWord());
+    fc[3] = FX_atof((CFX_ByteString)syntax.GetWord());
+  }
+}
+void CPDF_DefaultAppearance::GetColor(FX_ARGB& color,
+                                      int& iColorType,
+                                      FX_BOOL bStrokingOperation) {
+  color = 0;
+  iColorType = COLORTYPE_TRANSPARENT;
+  if (m_csDA.IsEmpty()) {
+    return;
+  }
+  CPDF_SimpleParser syntax(m_csDA);
+  if (syntax.FindTagParamFromStart(bStrokingOperation ? "G" : "g", 1)) {
+    iColorType = COLORTYPE_GRAY;
+    FX_FLOAT g = FX_atof((CFX_ByteString)syntax.GetWord()) * 255 + 0.5f;
+    color = ArgbEncode(255, (int)g, (int)g, (int)g);
+    return;
+  }
+  if (syntax.FindTagParamFromStart(bStrokingOperation ? "RG" : "rg", 3)) {
+    iColorType = COLORTYPE_RGB;
+    FX_FLOAT r = FX_atof((CFX_ByteString)syntax.GetWord()) * 255 + 0.5f;
+    FX_FLOAT g = FX_atof((CFX_ByteString)syntax.GetWord()) * 255 + 0.5f;
+    FX_FLOAT b = FX_atof((CFX_ByteString)syntax.GetWord()) * 255 + 0.5f;
+    color = ArgbEncode(255, (int)r, (int)g, (int)b);
+    return;
+  }
+  if (syntax.FindTagParamFromStart(bStrokingOperation ? "K" : "k", 4)) {
+    iColorType = COLORTYPE_CMYK;
+    FX_FLOAT c = FX_atof((CFX_ByteString)syntax.GetWord());
+    FX_FLOAT m = FX_atof((CFX_ByteString)syntax.GetWord());
+    FX_FLOAT y = FX_atof((CFX_ByteString)syntax.GetWord());
+    FX_FLOAT k = FX_atof((CFX_ByteString)syntax.GetWord());
+    FX_FLOAT r = 1.0f - std::min(1.0f, c + k);
+    FX_FLOAT g = 1.0f - std::min(1.0f, m + k);
+    FX_FLOAT b = 1.0f - std::min(1.0f, y + k);
+    color = ArgbEncode(255, (int)(r * 255 + 0.5f), (int)(g * 255 + 0.5f),
+                       (int)(b * 255 + 0.5f));
+  }
+}
+FX_BOOL CPDF_DefaultAppearance::HasTextMatrix() {
+  if (m_csDA.IsEmpty()) {
+    return FALSE;
+  }
+  CPDF_SimpleParser syntax(m_csDA);
+  return syntax.FindTagParamFromStart("Tm", 6);
+}
+CFX_ByteString CPDF_DefaultAppearance::GetTextMatrixString() {
+  CFX_ByteString csTM;
+  if (m_csDA.IsEmpty()) {
+    return csTM;
+  }
+  CPDF_SimpleParser syntax(m_csDA);
+  if (syntax.FindTagParamFromStart("Tm", 6)) {
+    for (int i = 0; i < 6; i++) {
+      csTM += (CFX_ByteString)syntax.GetWord();
+      csTM += " ";
+    }
+    csTM += (CFX_ByteString)syntax.GetWord();
+  }
+  return csTM;
+}
+CFX_Matrix CPDF_DefaultAppearance::GetTextMatrix() {
+  CFX_Matrix tm;
+  if (m_csDA.IsEmpty()) {
+    return tm;
+  }
+  CPDF_SimpleParser syntax(m_csDA);
+  if (syntax.FindTagParamFromStart("Tm", 6)) {
+    FX_FLOAT f[6];
+    for (int i = 0; i < 6; i++) {
+      f[i] = FX_atof((CFX_ByteString)syntax.GetWord());
+    }
+    tm.Set(f[0], f[1], f[2], f[3], f[4], f[5]);
+  }
+  return tm;
+}
+void InitInterFormDict(CPDF_Dictionary*& pFormDict, CPDF_Document* pDocument) {
+  if (!pDocument) {
+    return;
+  }
+  if (!pFormDict) {
+    pFormDict = new CPDF_Dictionary;
+    FX_DWORD dwObjNum = pDocument->AddIndirectObject(pFormDict);
+    CPDF_Dictionary* pRoot = pDocument->GetRoot();
+    pRoot->SetAtReference("AcroForm", pDocument, dwObjNum);
+  }
+  CFX_ByteString csDA;
+  if (!pFormDict->KeyExist("DR")) {
+    CPDF_Font* pFont = NULL;
+    CFX_ByteString csBaseName, csDefault;
+    uint8_t charSet = CPDF_InterForm::GetNativeCharSet();
+    pFont = CPDF_InterForm::AddStandardFont(pDocument, "Helvetica");
+    if (pFont) {
+      AddInterFormFont(pFormDict, pDocument, pFont, csBaseName);
+      csDefault = csBaseName;
+    }
+    if (charSet != 0) {
+      CFX_ByteString csFontName = CPDF_InterForm::GetNativeFont(charSet, NULL);
+      if (!pFont || csFontName != "Helvetica") {
+        pFont = CPDF_InterForm::AddNativeFont(pDocument);
+        if (pFont) {
+          csBaseName = "";
+          AddInterFormFont(pFormDict, pDocument, pFont, csBaseName);
+          csDefault = csBaseName;
+        }
+      }
+    }
+    if (pFont) {
+      csDA = "/" + PDF_NameEncode(csDefault) + " 0 Tf";
+    }
+  }
+  if (!csDA.IsEmpty()) {
+    csDA += " ";
+  }
+  csDA += "0 g";
+  if (!pFormDict->KeyExist("DA")) {
+    pFormDict->SetAtString("DA", csDA);
+  }
+}
+FX_DWORD CountInterFormFonts(CPDF_Dictionary* pFormDict) {
+  if (!pFormDict) {
+    return 0;
+  }
+  CPDF_Dictionary* pDR = pFormDict->GetDictBy("DR");
+  if (!pDR) {
+    return 0;
+  }
+  CPDF_Dictionary* pFonts = pDR->GetDictBy("Font");
+  if (!pFonts) {
+    return 0;
+  }
+  FX_DWORD dwCount = 0;
+  for (const auto& it : *pFonts) {
+    CPDF_Object* pObj = it.second;
+    if (!pObj) {
+      continue;
+    }
+    if (CPDF_Dictionary* pDirect = ToDictionary(pObj->GetDirect())) {
+      if (pDirect->GetStringBy("Type") == "Font") {
+        dwCount++;
+      }
+    }
+  }
+  return dwCount;
+}
+CPDF_Font* GetInterFormFont(CPDF_Dictionary* pFormDict,
+                            CPDF_Document* pDocument,
+                            FX_DWORD index,
+                            CFX_ByteString& csNameTag) {
+  if (!pFormDict) {
+    return NULL;
+  }
+  CPDF_Dictionary* pDR = pFormDict->GetDictBy("DR");
+  if (!pDR) {
+    return NULL;
+  }
+  CPDF_Dictionary* pFonts = pDR->GetDictBy("Font");
+  if (!pFonts) {
+    return NULL;
+  }
+  FX_DWORD dwCount = 0;
+  for (const auto& it : *pFonts) {
+    const CFX_ByteString& csKey = it.first;
+    CPDF_Object* pObj = it.second;
+    if (!pObj) {
+      continue;
+    }
+    CPDF_Dictionary* pElement = ToDictionary(pObj->GetDirect());
+    if (!pElement)
+      continue;
+    if (pElement->GetStringBy("Type") != "Font")
+      continue;
+    if (dwCount == index) {
+      csNameTag = csKey;
+      return pDocument->LoadFont(pElement);
+    }
+    dwCount++;
+  }
+  return NULL;
+}
+CPDF_Font* GetInterFormFont(CPDF_Dictionary* pFormDict,
+                            CPDF_Document* pDocument,
+                            CFX_ByteString csNameTag) {
+  CFX_ByteString csAlias = PDF_NameDecode(csNameTag);
+  if (!pFormDict || csAlias.IsEmpty()) {
+    return NULL;
+  }
+  CPDF_Dictionary* pDR = pFormDict->GetDictBy("DR");
+  if (!pDR) {
+    return NULL;
+  }
+  CPDF_Dictionary* pFonts = pDR->GetDictBy("Font");
+  if (!pFonts) {
+    return NULL;
+  }
+  CPDF_Dictionary* pElement = pFonts->GetDictBy(csAlias);
+  if (!pElement) {
+    return NULL;
+  }
+  if (pElement->GetStringBy("Type") == "Font") {
+    return pDocument->LoadFont(pElement);
+  }
+  return NULL;
+}
+CPDF_Font* GetInterFormFont(CPDF_Dictionary* pFormDict,
+                            CPDF_Document* pDocument,
+                            CFX_ByteString csFontName,
+                            CFX_ByteString& csNameTag) {
+  if (!pFormDict || csFontName.IsEmpty()) {
+    return NULL;
+  }
+  CPDF_Dictionary* pDR = pFormDict->GetDictBy("DR");
+  if (!pDR) {
+    return NULL;
+  }
+  CPDF_Dictionary* pFonts = pDR->GetDictBy("Font");
+  if (!pFonts) {
+    return NULL;
+  }
+  for (const auto& it : *pFonts) {
+    const CFX_ByteString& csKey = it.first;
+    CPDF_Object* pObj = it.second;
+    if (!pObj) {
+      continue;
+    }
+    CPDF_Dictionary* pElement = ToDictionary(pObj->GetDirect());
+    if (!pElement)
+      continue;
+    if (pElement->GetStringBy("Type") != "Font")
+      continue;
+
+    CPDF_Font* pFind = pDocument->LoadFont(pElement);
+    if (!pFind)
+      continue;
+
+    CFX_ByteString csBaseFont;
+    csBaseFont = pFind->GetBaseFont();
+    csBaseFont.Remove(' ');
+    if (csBaseFont == csFontName) {
+      csNameTag = csKey;
+      return pFind;
+    }
+  }
+  return NULL;
+}
+CPDF_Font* GetNativeInterFormFont(CPDF_Dictionary* pFormDict,
+                                  CPDF_Document* pDocument,
+                                  uint8_t charSet,
+                                  CFX_ByteString& csNameTag) {
+  if (!pFormDict) {
+    return NULL;
+  }
+  CPDF_Dictionary* pDR = pFormDict->GetDictBy("DR");
+  if (!pDR) {
+    return NULL;
+  }
+  CPDF_Dictionary* pFonts = pDR->GetDictBy("Font");
+  if (!pFonts) {
+    return NULL;
+  }
+  for (const auto& it : *pFonts) {
+    const CFX_ByteString& csKey = it.first;
+    CPDF_Object* pObj = it.second;
+    if (!pObj) {
+      continue;
+    }
+    CPDF_Dictionary* pElement = ToDictionary(pObj->GetDirect());
+    if (!pElement)
+      continue;
+    if (pElement->GetStringBy("Type") != "Font")
+      continue;
+    CPDF_Font* pFind = pDocument->LoadFont(pElement);
+    if (!pFind) {
+      continue;
+    }
+    CFX_SubstFont* pSubst = (CFX_SubstFont*)pFind->GetSubstFont();
+    if (!pSubst) {
+      continue;
+    }
+    if (pSubst->m_Charset == (int)charSet) {
+      csNameTag = csKey;
+      return pFind;
+    }
+  }
+  return NULL;
+}
+CPDF_Font* GetNativeInterFormFont(CPDF_Dictionary* pFormDict,
+                                  CPDF_Document* pDocument,
+                                  CFX_ByteString& csNameTag) {
+  csNameTag = "";
+  uint8_t charSet = CPDF_InterForm::GetNativeCharSet();
+  CFX_SubstFont* pSubst;
+  CPDF_Font* pFont = GetDefaultInterFormFont(pFormDict, pDocument);
+  if (pFont) {
+    pSubst = (CFX_SubstFont*)pFont->GetSubstFont();
+    if (pSubst && pSubst->m_Charset == (int)charSet) {
+      FindInterFormFont(pFormDict, pFont, csNameTag);
+      return pFont;
+    }
+  }
+  return GetNativeInterFormFont(pFormDict, pDocument, charSet, csNameTag);
+}
+FX_BOOL FindInterFormFont(CPDF_Dictionary* pFormDict,
+                          const CPDF_Font* pFont,
+                          CFX_ByteString& csNameTag) {
+  if (!pFormDict || !pFont) {
+    return FALSE;
+  }
+  CPDF_Dictionary* pDR = pFormDict->GetDictBy("DR");
+  if (!pDR) {
+    return FALSE;
+  }
+  CPDF_Dictionary* pFonts = pDR->GetDictBy("Font");
+  if (!pFonts) {
+    return FALSE;
+  }
+  for (const auto& it : *pFonts) {
+    const CFX_ByteString& csKey = it.first;
+    CPDF_Object* pObj = it.second;
+    if (!pObj) {
+      continue;
+    }
+    CPDF_Dictionary* pElement = ToDictionary(pObj->GetDirect());
+    if (!pElement)
+      continue;
+    if (pElement->GetStringBy("Type") != "Font") {
+      continue;
+    }
+    if (pFont->GetFontDict() == pElement) {
+      csNameTag = csKey;
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+FX_BOOL FindInterFormFont(CPDF_Dictionary* pFormDict,
+                          CPDF_Document* pDocument,
+                          CFX_ByteString csFontName,
+                          CPDF_Font*& pFont,
+                          CFX_ByteString& csNameTag) {
+  if (!pFormDict) {
+    return FALSE;
+  }
+  CPDF_Dictionary* pDR = pFormDict->GetDictBy("DR");
+  if (!pDR) {
+    return FALSE;
+  }
+  CPDF_Dictionary* pFonts = pDR->GetDictBy("Font");
+  if (!pFonts) {
+    return FALSE;
+  }
+  if (csFontName.GetLength() > 0) {
+    csFontName.Remove(' ');
+  }
+  for (const auto& it : *pFonts) {
+    const CFX_ByteString& csKey = it.first;
+    CPDF_Object* pObj = it.second;
+    if (!pObj) {
+      continue;
+    }
+    CPDF_Dictionary* pElement = ToDictionary(pObj->GetDirect());
+    if (!pElement)
+      continue;
+    if (pElement->GetStringBy("Type") != "Font") {
+      continue;
+    }
+    pFont = pDocument->LoadFont(pElement);
+    if (!pFont) {
+      continue;
+    }
+    CFX_ByteString csBaseFont;
+    csBaseFont = pFont->GetBaseFont();
+    csBaseFont.Remove(' ');
+    if (csBaseFont == csFontName) {
+      csNameTag = csKey;
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+void AddInterFormFont(CPDF_Dictionary*& pFormDict,
+                      CPDF_Document* pDocument,
+                      const CPDF_Font* pFont,
+                      CFX_ByteString& csNameTag) {
+  if (!pFont) {
+    return;
+  }
+  if (!pFormDict) {
+    InitInterFormDict(pFormDict, pDocument);
+  }
+  CFX_ByteString csTag;
+  if (FindInterFormFont(pFormDict, pFont, csTag)) {
+    csNameTag = csTag;
+    return;
+  }
+  if (!pFormDict) {
+    InitInterFormDict(pFormDict, pDocument);
+  }
+  CPDF_Dictionary* pDR = pFormDict->GetDictBy("DR");
+  if (!pDR) {
+    pDR = new CPDF_Dictionary;
+    pFormDict->SetAt("DR", pDR);
+  }
+  CPDF_Dictionary* pFonts = pDR->GetDictBy("Font");
+  if (!pFonts) {
+    pFonts = new CPDF_Dictionary;
+    pDR->SetAt("Font", pFonts);
+  }
+  if (csNameTag.IsEmpty()) {
+    csNameTag = pFont->GetBaseFont();
+  }
+  csNameTag.Remove(' ');
+  csNameTag =
+      CPDF_InterForm::GenerateNewResourceName(pDR, "Font", 4, csNameTag);
+  pFonts->SetAtReference(csNameTag, pDocument, pFont->GetFontDict());
+}
+CPDF_Font* AddNativeInterFormFont(CPDF_Dictionary*& pFormDict,
+                                  CPDF_Document* pDocument,
+                                  uint8_t charSet,
+                                  CFX_ByteString& csNameTag) {
+  if (!pFormDict) {
+    InitInterFormDict(pFormDict, pDocument);
+  }
+  CFX_ByteString csTemp;
+  CPDF_Font* pFont =
+      GetNativeInterFormFont(pFormDict, pDocument, charSet, csTemp);
+  if (pFont) {
+    csNameTag = csTemp;
+    return pFont;
+  }
+  CFX_ByteString csFontName = CPDF_InterForm::GetNativeFont(charSet);
+  if (!csFontName.IsEmpty()) {
+    if (FindInterFormFont(pFormDict, pDocument, csFontName, pFont, csNameTag)) {
+      return pFont;
+    }
+  }
+  pFont = CPDF_InterForm::AddNativeFont(charSet, pDocument);
+  if (pFont) {
+    AddInterFormFont(pFormDict, pDocument, pFont, csNameTag);
+  }
+  return pFont;
+}
+CPDF_Font* AddNativeInterFormFont(CPDF_Dictionary*& pFormDict,
+                                  CPDF_Document* pDocument,
+                                  CFX_ByteString& csNameTag) {
+  uint8_t charSet = CPDF_InterForm::GetNativeCharSet();
+  return AddNativeInterFormFont(pFormDict, pDocument, charSet, csNameTag);
+}
+void RemoveInterFormFont(CPDF_Dictionary* pFormDict, const CPDF_Font* pFont) {
+  if (!pFormDict || !pFont) {
+    return;
+  }
+  CFX_ByteString csTag;
+  if (!FindInterFormFont(pFormDict, pFont, csTag)) {
+    return;
+  }
+  CPDF_Dictionary* pDR = pFormDict->GetDictBy("DR");
+  CPDF_Dictionary* pFonts = pDR->GetDictBy("Font");
+  pFonts->RemoveAt(csTag);
+}
+void RemoveInterFormFont(CPDF_Dictionary* pFormDict, CFX_ByteString csNameTag) {
+  if (!pFormDict || csNameTag.IsEmpty()) {
+    return;
+  }
+  CPDF_Dictionary* pDR = pFormDict->GetDictBy("DR");
+  if (!pDR) {
+    return;
+  }
+  CPDF_Dictionary* pFonts = pDR->GetDictBy("Font");
+  if (!pFonts) {
+    return;
+  }
+  pFonts->RemoveAt(csNameTag);
+}
+
+CPDF_Font* GetDefaultInterFormFont(CPDF_Dictionary* pFormDict,
+                                   CPDF_Document* pDocument) {
+  if (!pFormDict) {
+    return NULL;
+  }
+  CPDF_DefaultAppearance cDA(pFormDict->GetStringBy("DA"));
+  CFX_ByteString csFontNameTag;
+  FX_FLOAT fFontSize;
+  cDA.GetFont(csFontNameTag, fFontSize);
+  return GetInterFormFont(pFormDict, pDocument, csFontNameTag);
+}
+
+CPDF_IconFit::ScaleMethod CPDF_IconFit::GetScaleMethod() {
+  if (!m_pDict) {
+    return Always;
+  }
+  CFX_ByteString csSW = m_pDict->GetStringBy("SW", "A");
+  if (csSW == "B") {
+    return Bigger;
+  }
+  if (csSW == "S") {
+    return Smaller;
+  }
+  if (csSW == "N") {
+    return Never;
+  }
+  return Always;
+}
+FX_BOOL CPDF_IconFit::IsProportionalScale() {
+  if (!m_pDict) {
+    return TRUE;
+  }
+  return m_pDict->GetStringBy("S", "P") != "A";
+}
+void CPDF_IconFit::GetIconPosition(FX_FLOAT& fLeft, FX_FLOAT& fBottom) {
+  fLeft = fBottom = 0.5;
+  if (!m_pDict) {
+    return;
+  }
+  CPDF_Array* pA = m_pDict->GetArrayBy("A");
+  if (pA) {
+    FX_DWORD dwCount = pA->GetCount();
+    if (dwCount > 0) {
+      fLeft = pA->GetNumberAt(0);
+    }
+    if (dwCount > 1) {
+      fBottom = pA->GetNumberAt(1);
+    }
+  }
+}
+FX_BOOL CPDF_IconFit::GetFittingBounds() {
+  if (!m_pDict) {
+    return FALSE;
+  }
+  return m_pDict->GetBooleanBy("FB");
+}
+
+std::vector<bool> SaveCheckedFieldStatus(CPDF_FormField* pField) {
+  std::vector<bool> result;
+  int iCount = pField->CountControls();
+  for (int i = 0; i < iCount; ++i) {
+    if (CPDF_FormControl* pControl = pField->GetControl(i))
+      result.push_back(pControl->IsChecked());
+  }
+  return result;
+}
+
+CPDF_Object* FPDF_GetFieldAttr(CPDF_Dictionary* pFieldDict,
+                               const FX_CHAR* name,
+                               int nLevel) {
+  if (nLevel > FPDFDOC_UTILS_MAXRECURSION) {
+    return NULL;
+  }
+  if (!pFieldDict) {
+    return NULL;
+  }
+  CPDF_Object* pAttr = pFieldDict->GetElementValue(name);
+  if (pAttr) {
+    return pAttr;
+  }
+  CPDF_Dictionary* pParent = pFieldDict->GetDictBy("Parent");
+  if (!pParent) {
+    return NULL;
+  }
+  return FPDF_GetFieldAttr(pParent, name, nLevel + 1);
+}
diff --git a/core/fpdfdoc/doc_utils.h b/core/fpdfdoc/doc_utils.h
new file mode 100644
index 0000000000..ed687943da
--- /dev/null
+++ b/core/fpdfdoc/doc_utils.h
@@ -0,0 +1,80 @@
+// Copyright 2015 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef CORE_FPDFDOC_DOC_UTILS_H_
+#define CORE_FPDFDOC_DOC_UTILS_H_
+
+#include <vector>
+
+#include "core/include/fpdfapi/cpdf_parser.h"
+#include "core/include/fpdfapi/fpdf_resource.h"
+
+class CPDF_Dictionary;
+class CPDF_FormField;
+
+class CPDF_NumberTree {
+ public:
+  CPDF_NumberTree(CPDF_Dictionary* pRoot) : m_pRoot(pRoot) {}
+  CPDF_Object* LookupValue(int num) const;
+
+ protected:
+  CPDF_Dictionary* const m_pRoot;
+};
+
+CFX_WideString GetFullName(CPDF_Dictionary* pFieldDict);
+void InitInterFormDict(CPDF_Dictionary*& pFormDict, CPDF_Document* pDocument);
+FX_DWORD CountInterFormFonts(CPDF_Dictionary* pFormDict);
+CPDF_Font* GetInterFormFont(CPDF_Dictionary* pFormDict,
+                            CPDF_Document* pDocument,
+                            FX_DWORD index,
+                            CFX_ByteString& csNameTag);
+CPDF_Font* GetInterFormFont(CPDF_Dictionary* pFormDict,
+                            CPDF_Document* pDocument,
+                            CFX_ByteString csNameTag);
+CPDF_Font* GetInterFormFont(CPDF_Dictionary* pFormDict,
+                            CPDF_Document* pDocument,
+                            CFX_ByteString csFontName,
+                            CFX_ByteString& csNameTag);
+CPDF_Font* GetNativeInterFormFont(CPDF_Dictionary* pFormDict,
+                                  CPDF_Document* pDocument,
+                                  uint8_t charSet,
+                                  CFX_ByteString& csNameTag);
+CPDF_Font* GetNativeInterFormFont(CPDF_Dictionary* pFormDict,
+                                  CPDF_Document* pDocument,
+                                  CFX_ByteString& csNameTag);
+FX_BOOL FindInterFormFont(CPDF_Dictionary* pFormDict,
+                          const CPDF_Font* pFont,
+                          CFX_ByteString& csNameTag);
+FX_BOOL FindInterFormFont(CPDF_Dictionary* pFormDict,
+                          CPDF_Document* pDocument,
+                          CFX_ByteString csFontName,
+                          CPDF_Font*& pFont,
+                          CFX_ByteString& csNameTag);
+void AddInterFormFont(CPDF_Dictionary*& pFormDict,
+                      CPDF_Document* pDocument,
+                      const CPDF_Font* pFont,
+                      CFX_ByteString& csNameTag);
+CPDF_Font* AddNativeInterFormFont(CPDF_Dictionary*& pFormDict,
+                                  CPDF_Document* pDocument,
+                                  uint8_t charSet,
+                                  CFX_ByteString& csNameTag);
+CPDF_Font* AddNativeInterFormFont(CPDF_Dictionary*& pFormDict,
+                                  CPDF_Document* pDocument,
+                                  CFX_ByteString& csNameTag);
+void RemoveInterFormFont(CPDF_Dictionary* pFormDict, const CPDF_Font* pFont);
+void RemoveInterFormFont(CPDF_Dictionary* pFormDict, CFX_ByteString csNameTag);
+CPDF_Font* GetDefaultInterFormFont(CPDF_Dictionary* pFormDict,
+                                   CPDF_Document* pDocument);
+void SetDefaultInterFormFont(CPDF_Dictionary*& pFormDict,
+                             CPDF_Document* pDocument,
+                             const CPDF_Font* pFont);
+std::vector<bool> SaveCheckedFieldStatus(CPDF_FormField* pField);
+FX_BOOL NeedPDFEncodeForFieldFullName(const CFX_WideString& csFieldName);
+FX_BOOL NeedPDFEncodeForFieldTree(CPDF_Dictionary* pFieldDict, int nLevel = 0);
+void EncodeFieldName(const CFX_WideString& csName, CFX_ByteString& csT);
+void UpdateEncodeFieldName(CPDF_Dictionary* pFieldDict, int nLevel = 0);
+
+#endif  // CORE_FPDFDOC_DOC_UTILS_H_
diff --git a/core/fpdfdoc/doc_viewerPreferences.cpp b/core/fpdfdoc/doc_viewerPreferences.cpp
new file mode 100644
index 0000000000..582f3a5a93
--- /dev/null
+++ b/core/fpdfdoc/doc_viewerPreferences.cpp
@@ -0,0 +1,54 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+
+CPDF_ViewerPreferences::CPDF_ViewerPreferences(CPDF_Document* pDoc)
+    : m_pDoc(pDoc) {}
+CPDF_ViewerPreferences::~CPDF_ViewerPreferences() {}
+FX_BOOL CPDF_ViewerPreferences::IsDirectionR2L() const {
+  CPDF_Dictionary* pDict = m_pDoc->GetRoot();
+  pDict = pDict->GetDictBy("ViewerPreferences");
+  if (!pDict) {
+    return FALSE;
+  }
+  return "R2L" == pDict->GetStringBy("Direction");
+}
+FX_BOOL CPDF_ViewerPreferences::PrintScaling() const {
+  CPDF_Dictionary* pDict = m_pDoc->GetRoot();
+  pDict = pDict->GetDictBy("ViewerPreferences");
+  if (!pDict) {
+    return TRUE;
+  }
+  return "None" != pDict->GetStringBy("PrintScaling");
+}
+int32_t CPDF_ViewerPreferences::NumCopies() const {
+  CPDF_Dictionary* pDict = m_pDoc->GetRoot();
+  pDict = pDict->GetDictBy("ViewerPreferences");
+  if (!pDict) {
+    return 1;
+  }
+  return pDict->GetIntegerBy("NumCopies");
+}
+CPDF_Array* CPDF_ViewerPreferences::PrintPageRange() const {
+  CPDF_Dictionary* pDict = m_pDoc->GetRoot();
+  CPDF_Array* pRange = NULL;
+  pDict = pDict->GetDictBy("ViewerPreferences");
+  if (!pDict) {
+    return pRange;
+  }
+  pRange = pDict->GetArrayBy("PrintPageRange");
+  return pRange;
+}
+CFX_ByteString CPDF_ViewerPreferences::Duplex() const {
+  CPDF_Dictionary* pDict = m_pDoc->GetRoot();
+  pDict = pDict->GetDictBy("ViewerPreferences");
+  if (!pDict) {
+    return "None";
+  }
+  return pDict->GetStringBy("Duplex");
+}
diff --git a/core/fpdfdoc/doc_vt.cpp b/core/fpdfdoc/doc_vt.cpp
new file mode 100644
index 0000000000..dddc57f2dd
--- /dev/null
+++ b/core/fpdfdoc/doc_vt.cpp
@@ -0,0 +1,1825 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include <algorithm>
+
+#include "core/fpdfdoc/pdf_vt.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+#include "core/include/fpdfdoc/fpdf_vt.h"
+
+const uint8_t gFontSizeSteps[] = {4,  6,  8,   9,   10,  12,  14, 18, 20,
+                                  25, 30, 35,  40,  45,  50,  55, 60, 70,
+                                  80, 90, 100, 110, 120, 130, 144};
+#define PVT_RETURN_LENGTH 1
+#define PVT_DEFAULT_FONTSIZE 18.0f
+#define PVTWORD_SCRIPT_NORMAL 0
+#define PVTWORD_SCRIPT_SUPER 1
+#define PVTWORD_SCRIPT_SUB 2
+#define PVT_FONTSCALE 0.001f
+#define PVT_PERCENT 0.01f
+#define PVT_HALF 0.5f
+CLine::CLine() {}
+CLine::~CLine() {}
+CPVT_WordPlace CLine::GetBeginWordPlace() const {
+  return CPVT_WordPlace(LinePlace.nSecIndex, LinePlace.nLineIndex, -1);
+}
+CPVT_WordPlace CLine::GetEndWordPlace() const {
+  return CPVT_WordPlace(LinePlace.nSecIndex, LinePlace.nLineIndex,
+                        m_LineInfo.nEndWordIndex);
+}
+CPVT_WordPlace CLine::GetPrevWordPlace(const CPVT_WordPlace& place) const {
+  if (place.nWordIndex > m_LineInfo.nEndWordIndex) {
+    return CPVT_WordPlace(place.nSecIndex, place.nLineIndex,
+                          m_LineInfo.nEndWordIndex);
+  }
+  return CPVT_WordPlace(place.nSecIndex, place.nLineIndex,
+                        place.nWordIndex - 1);
+}
+CPVT_WordPlace CLine::GetNextWordPlace(const CPVT_WordPlace& place) const {
+  if (place.nWordIndex < m_LineInfo.nBeginWordIndex) {
+    return CPVT_WordPlace(place.nSecIndex, place.nLineIndex,
+                          m_LineInfo.nBeginWordIndex);
+  }
+  return CPVT_WordPlace(place.nSecIndex, place.nLineIndex,
+                        place.nWordIndex + 1);
+}
+CSection::CSection(CPDF_VariableText* pVT) : m_pVT(pVT) {}
+CSection::~CSection() {
+  ResetAll();
+}
+void CSection::ResetAll() {
+  ResetWordArray();
+  ResetLineArray();
+}
+void CSection::ResetLineArray() {
+  m_LineArray.RemoveAll();
+}
+void CSection::ResetWordArray() {
+  for (int32_t i = 0, sz = m_WordArray.GetSize(); i < sz; i++) {
+    delete m_WordArray.GetAt(i);
+  }
+  m_WordArray.RemoveAll();
+}
+void CSection::ResetLinePlace() {
+  for (int32_t i = 0, sz = m_LineArray.GetSize(); i < sz; i++) {
+    if (CLine* pLine = m_LineArray.GetAt(i)) {
+      pLine->LinePlace = CPVT_WordPlace(SecPlace.nSecIndex, i, -1);
+    }
+  }
+}
+CPVT_WordPlace CSection::AddWord(const CPVT_WordPlace& place,
+                                 const CPVT_WordInfo& wordinfo) {
+  CPVT_WordInfo* pWord = new CPVT_WordInfo(wordinfo);
+  int32_t nWordIndex =
+      std::max(std::min(place.nWordIndex, m_WordArray.GetSize()), 0);
+  if (nWordIndex == m_WordArray.GetSize()) {
+    m_WordArray.Add(pWord);
+  } else {
+    m_WordArray.InsertAt(nWordIndex, pWord);
+  }
+  return place;
+}
+CPVT_WordPlace CSection::AddLine(const CPVT_LineInfo& lineinfo) {
+  return CPVT_WordPlace(SecPlace.nSecIndex, m_LineArray.Add(lineinfo), -1);
+}
+CPVT_FloatRect CSection::Rearrange() {
+  if (m_pVT->m_nCharArray > 0) {
+    return CTypeset(this).CharArray();
+  }
+  return CTypeset(this).Typeset();
+}
+CPVT_Size CSection::GetSectionSize(FX_FLOAT fFontSize) {
+  return CTypeset(this).GetEditSize(fFontSize);
+}
+CPVT_WordPlace CSection::GetBeginWordPlace() const {
+  if (CLine* pLine = m_LineArray.GetAt(0)) {
+    return pLine->GetBeginWordPlace();
+  }
+  return SecPlace;
+}
+CPVT_WordPlace CSection::GetEndWordPlace() const {
+  if (CLine* pLine = m_LineArray.GetAt(m_LineArray.GetSize() - 1)) {
+    return pLine->GetEndWordPlace();
+  }
+  return SecPlace;
+}
+CPVT_WordPlace CSection::GetPrevWordPlace(const CPVT_WordPlace& place) const {
+  if (place.nLineIndex < 0) {
+    return GetBeginWordPlace();
+  }
+  if (place.nLineIndex >= m_LineArray.GetSize()) {
+    return GetEndWordPlace();
+  }
+  if (CLine* pLine = m_LineArray.GetAt(place.nLineIndex)) {
+    if (place.nWordIndex == pLine->m_LineInfo.nBeginWordIndex) {
+      return CPVT_WordPlace(place.nSecIndex, place.nLineIndex, -1);
+    }
+    if (place.nWordIndex < pLine->m_LineInfo.nBeginWordIndex) {
+      if (CLine* pPrevLine = m_LineArray.GetAt(place.nLineIndex - 1)) {
+        return pPrevLine->GetEndWordPlace();
+      }
+    } else {
+      return pLine->GetPrevWordPlace(place);
+    }
+  }
+  return place;
+}
+CPVT_WordPlace CSection::GetNextWordPlace(const CPVT_WordPlace& place) const {
+  if (place.nLineIndex < 0) {
+    return GetBeginWordPlace();
+  }
+  if (place.nLineIndex >= m_LineArray.GetSize()) {
+    return GetEndWordPlace();
+  }
+  if (CLine* pLine = m_LineArray.GetAt(place.nLineIndex)) {
+    if (place.nWordIndex >= pLine->m_LineInfo.nEndWordIndex) {
+      if (CLine* pNextLine = m_LineArray.GetAt(place.nLineIndex + 1)) {
+        return pNextLine->GetBeginWordPlace();
+      }
+    } else {
+      return pLine->GetNextWordPlace(place);
+    }
+  }
+  return place;
+}
+void CSection::UpdateWordPlace(CPVT_WordPlace& place) const {
+  int32_t nLeft = 0;
+  int32_t nRight = m_LineArray.GetSize() - 1;
+  int32_t nMid = (nLeft + nRight) / 2;
+  while (nLeft <= nRight) {
+    if (CLine* pLine = m_LineArray.GetAt(nMid)) {
+      if (place.nWordIndex < pLine->m_LineInfo.nBeginWordIndex) {
+        nRight = nMid - 1;
+        nMid = (nLeft + nRight) / 2;
+      } else if (place.nWordIndex > pLine->m_LineInfo.nEndWordIndex) {
+        nLeft = nMid + 1;
+        nMid = (nLeft + nRight) / 2;
+      } else {
+        place.nLineIndex = nMid;
+        return;
+      }
+    } else {
+      break;
+    }
+  }
+}
+CPVT_WordPlace CSection::SearchWordPlace(const CFX_FloatPoint& point) const {
+  ASSERT(m_pVT);
+  CPVT_WordPlace place = GetBeginWordPlace();
+  FX_BOOL bUp = TRUE;
+  FX_BOOL bDown = TRUE;
+  int32_t nLeft = 0;
+  int32_t nRight = m_LineArray.GetSize() - 1;
+  int32_t nMid = m_LineArray.GetSize() / 2;
+  FX_FLOAT fTop = 0;
+  FX_FLOAT fBottom = 0;
+  while (nLeft <= nRight) {
+    if (CLine* pLine = m_LineArray.GetAt(nMid)) {
+      fTop = pLine->m_LineInfo.fLineY - pLine->m_LineInfo.fLineAscent -
+             m_pVT->GetLineLeading(m_SecInfo);
+      fBottom = pLine->m_LineInfo.fLineY - pLine->m_LineInfo.fLineDescent;
+      if (IsFloatBigger(point.y, fTop)) {
+        bUp = FALSE;
+      }
+      if (IsFloatSmaller(point.y, fBottom)) {
+        bDown = FALSE;
+      }
+      if (IsFloatSmaller(point.y, fTop)) {
+        nRight = nMid - 1;
+        nMid = (nLeft + nRight) / 2;
+        continue;
+      } else if (IsFloatBigger(point.y, fBottom)) {
+        nLeft = nMid + 1;
+        nMid = (nLeft + nRight) / 2;
+        continue;
+      } else {
+        place = SearchWordPlace(
+            point.x,
+            CPVT_WordRange(pLine->GetNextWordPlace(pLine->GetBeginWordPlace()),
+                           pLine->GetEndWordPlace()));
+        place.nLineIndex = nMid;
+        return place;
+      }
+    }
+  }
+  if (bUp) {
+    place = GetBeginWordPlace();
+  }
+  if (bDown) {
+    place = GetEndWordPlace();
+  }
+  return place;
+}
+CPVT_WordPlace CSection::SearchWordPlace(
+    FX_FLOAT fx,
+    const CPVT_WordPlace& lineplace) const {
+  if (CLine* pLine = m_LineArray.GetAt(lineplace.nLineIndex)) {
+    return SearchWordPlace(
+        fx - m_SecInfo.rcSection.left,
+        CPVT_WordRange(pLine->GetNextWordPlace(pLine->GetBeginWordPlace()),
+                       pLine->GetEndWordPlace()));
+  }
+  return GetBeginWordPlace();
+}
+CPVT_WordPlace CSection::SearchWordPlace(FX_FLOAT fx,
+                                         const CPVT_WordRange& range) const {
+  CPVT_WordPlace wordplace = range.BeginPos;
+  wordplace.nWordIndex = -1;
+  if (!m_pVT) {
+    return wordplace;
+  }
+  int32_t nLeft = range.BeginPos.nWordIndex;
+  int32_t nRight = range.EndPos.nWordIndex + 1;
+  int32_t nMid = (nLeft + nRight) / 2;
+  while (nLeft < nRight) {
+    if (nMid == nLeft) {
+      break;
+    }
+    if (nMid == nRight) {
+      nMid--;
+      break;
+    }
+    if (CPVT_WordInfo* pWord = m_WordArray.GetAt(nMid)) {
+      if (fx > pWord->fWordX + m_pVT->GetWordWidth(*pWord) * PVT_HALF) {
+        nLeft = nMid;
+        nMid = (nLeft + nRight) / 2;
+        continue;
+      } else {
+        nRight = nMid;
+        nMid = (nLeft + nRight) / 2;
+        continue;
+      }
+    } else {
+      break;
+    }
+  }
+  if (CPVT_WordInfo* pWord = m_WordArray.GetAt(nMid)) {
+    if (fx > pWord->fWordX + m_pVT->GetWordWidth(*pWord) * PVT_HALF) {
+      wordplace.nWordIndex = nMid;
+    }
+  }
+  return wordplace;
+}
+void CSection::ClearLeftWords(int32_t nWordIndex) {
+  for (int32_t i = nWordIndex; i >= 0; i--) {
+    delete m_WordArray.GetAt(i);
+    m_WordArray.RemoveAt(i);
+  }
+}
+void CSection::ClearRightWords(int32_t nWordIndex) {
+  for (int32_t i = m_WordArray.GetSize() - 1; i > nWordIndex; i--) {
+    delete m_WordArray.GetAt(i);
+    m_WordArray.RemoveAt(i);
+  }
+}
+void CSection::ClearMidWords(int32_t nBeginIndex, int32_t nEndIndex) {
+  for (int32_t i = nEndIndex; i > nBeginIndex; i--) {
+    delete m_WordArray.GetAt(i);
+    m_WordArray.RemoveAt(i);
+  }
+}
+void CSection::ClearWords(const CPVT_WordRange& PlaceRange) {
+  CPVT_WordPlace SecBeginPos = GetBeginWordPlace();
+  CPVT_WordPlace SecEndPos = GetEndWordPlace();
+  if (PlaceRange.BeginPos.WordCmp(SecBeginPos) >= 0) {
+    if (PlaceRange.EndPos.WordCmp(SecEndPos) <= 0) {
+      ClearMidWords(PlaceRange.BeginPos.nWordIndex,
+                    PlaceRange.EndPos.nWordIndex);
+    } else {
+      ClearRightWords(PlaceRange.BeginPos.nWordIndex);
+    }
+  } else if (PlaceRange.EndPos.WordCmp(SecEndPos) <= 0) {
+    ClearLeftWords(PlaceRange.EndPos.nWordIndex);
+  } else {
+    ResetWordArray();
+  }
+}
+void CSection::ClearWord(const CPVT_WordPlace& place) {
+  delete m_WordArray.GetAt(place.nWordIndex);
+  m_WordArray.RemoveAt(place.nWordIndex);
+}
+CTypeset::CTypeset(CSection* pSection)
+    : m_rcRet(0.0f, 0.0f, 0.0f, 0.0f),
+      m_pVT(pSection->m_pVT),
+      m_pSection(pSection) {}
+CTypeset::~CTypeset() {}
+CPVT_FloatRect CTypeset::CharArray() {
+  ASSERT(m_pSection);
+  FX_FLOAT fLineAscent =
+      m_pVT->GetFontAscent(m_pVT->GetDefaultFontIndex(), m_pVT->GetFontSize());
+  FX_FLOAT fLineDescent =
+      m_pVT->GetFontDescent(m_pVT->GetDefaultFontIndex(), m_pVT->GetFontSize());
+  m_rcRet.Default();
+  FX_FLOAT x = 0.0f, y = 0.0f;
+  FX_FLOAT fNextWidth;
+  int32_t nStart = 0;
+  FX_FLOAT fNodeWidth = m_pVT->GetPlateWidth() /
+                        (m_pVT->m_nCharArray <= 0 ? 1 : m_pVT->m_nCharArray);
+  if (CLine* pLine = m_pSection->m_LineArray.GetAt(0)) {
+    x = 0.0f;
+    y += m_pVT->GetLineLeading(m_pSection->m_SecInfo);
+    y += fLineAscent;
+    nStart = 0;
+    switch (m_pVT->GetAlignment(m_pSection->m_SecInfo)) {
+      case 0:
+        pLine->m_LineInfo.fLineX = fNodeWidth * PVT_HALF;
+        break;
+      case 1:
+        nStart = (m_pVT->m_nCharArray - m_pSection->m_WordArray.GetSize()) / 2;
+        pLine->m_LineInfo.fLineX = fNodeWidth * nStart - fNodeWidth * PVT_HALF;
+        break;
+      case 2:
+        nStart = m_pVT->m_nCharArray - m_pSection->m_WordArray.GetSize();
+        pLine->m_LineInfo.fLineX = fNodeWidth * nStart - fNodeWidth * PVT_HALF;
+        break;
+    }
+    for (int32_t w = 0, sz = m_pSection->m_WordArray.GetSize(); w < sz; w++) {
+      if (w >= m_pVT->m_nCharArray) {
+        break;
+      }
+      fNextWidth = 0;
+      if (CPVT_WordInfo* pNextWord =
+              (CPVT_WordInfo*)m_pSection->m_WordArray.GetAt(w + 1)) {
+        pNextWord->fWordTail = 0;
+        fNextWidth = m_pVT->GetWordWidth(*pNextWord);
+      }
+      if (CPVT_WordInfo* pWord =
+              (CPVT_WordInfo*)m_pSection->m_WordArray.GetAt(w)) {
+        pWord->fWordTail = 0;
+        FX_FLOAT fWordWidth = m_pVT->GetWordWidth(*pWord);
+        FX_FLOAT fWordAscent = m_pVT->GetWordAscent(*pWord);
+        FX_FLOAT fWordDescent = m_pVT->GetWordDescent(*pWord);
+        x = (FX_FLOAT)(fNodeWidth * (w + nStart + 0.5) - fWordWidth * PVT_HALF);
+        pWord->fWordX = x;
+        pWord->fWordY = y;
+        if (w == 0) {
+          pLine->m_LineInfo.fLineX = x;
+        }
+        if (w != m_pSection->m_WordArray.GetSize() - 1) {
+          pWord->fWordTail =
+              (fNodeWidth - (fWordWidth + fNextWidth) * PVT_HALF > 0
+                   ? fNodeWidth - (fWordWidth + fNextWidth) * PVT_HALF
+                   : 0);
+        } else {
+          pWord->fWordTail = 0;
+        }
+        x += fWordWidth;
+        fLineAscent = std::max(fLineAscent, fWordAscent);
+        fLineDescent = std::min(fLineDescent, fWordDescent);
+      }
+    }
+    pLine->m_LineInfo.nBeginWordIndex = 0;
+    pLine->m_LineInfo.nEndWordIndex = m_pSection->m_WordArray.GetSize() - 1;
+    pLine->m_LineInfo.fLineY = y;
+    pLine->m_LineInfo.fLineWidth = x - pLine->m_LineInfo.fLineX;
+    pLine->m_LineInfo.fLineAscent = fLineAscent;
+    pLine->m_LineInfo.fLineDescent = fLineDescent;
+    y += (-fLineDescent);
+  }
+  return m_rcRet = CPVT_FloatRect(0, 0, x, y);
+}
+CPVT_Size CTypeset::GetEditSize(FX_FLOAT fFontSize) {
+  ASSERT(m_pSection);
+  ASSERT(m_pVT);
+  SplitLines(FALSE, fFontSize);
+  return CPVT_Size(m_rcRet.Width(), m_rcRet.Height());
+}
+CPVT_FloatRect CTypeset::Typeset() {
+  ASSERT(m_pVT);
+  m_pSection->m_LineArray.Empty();
+  SplitLines(TRUE, 0.0f);
+  m_pSection->m_LineArray.Clear();
+  OutputLines();
+  return m_rcRet;
+}
+static int special_chars[128] = {
+    0x0000, 0x000C, 0x0008, 0x000C, 0x0008, 0x0000, 0x0020, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0008, 0x0008, 0x0000,
+    0x0010, 0x0000, 0x0000, 0x0028, 0x000C, 0x0008, 0x0000, 0x0000, 0x0028,
+    0x0028, 0x0028, 0x0028, 0x0002, 0x0002, 0x0002, 0x0002, 0x0002, 0x0002,
+    0x0002, 0x0002, 0x0002, 0x0002, 0x0008, 0x0008, 0x0000, 0x0000, 0x0000,
+    0x0008, 0x0000, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001,
+    0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001,
+    0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001,
+    0x0001, 0x000C, 0x0000, 0x0008, 0x0000, 0x0000, 0x0000, 0x0001, 0x0001,
+    0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001,
+    0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001,
+    0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x000C, 0x0000, 0x0008,
+    0x0000, 0x0000,
+};
+static FX_BOOL IsLatin(FX_WORD word) {
+  if (word <= 0x007F) {
+    if (special_chars[word] & 0x0001) {
+      return TRUE;
+    }
+  }
+  if ((word >= 0x00C0 && word <= 0x00FF) ||
+      (word >= 0x0100 && word <= 0x024F) ||
+      (word >= 0x1E00 && word <= 0x1EFF) ||
+      (word >= 0x2C60 && word <= 0x2C7F) ||
+      (word >= 0xA720 && word <= 0xA7FF) ||
+      (word >= 0xFF21 && word <= 0xFF3A) ||
+      (word >= 0xFF41 && word <= 0xFF5A)) {
+    return TRUE;
+  }
+  return FALSE;
+}
+static FX_BOOL IsDigit(FX_DWORD word) {
+  return word >= 0x0030 && word <= 0x0039;
+}
+static FX_BOOL IsCJK(FX_DWORD word) {
+  if ((word >= 0x1100 && word <= 0x11FF) ||
+      (word >= 0x2E80 && word <= 0x2FFF) ||
+      (word >= 0x3040 && word <= 0x9FBF) ||
+      (word >= 0xAC00 && word <= 0xD7AF) ||
+      (word >= 0xF900 && word <= 0xFAFF) ||
+      (word >= 0xFE30 && word <= 0xFE4F) ||
+      (word >= 0x20000 && word <= 0x2A6DF) ||
+      (word >= 0x2F800 && word <= 0x2FA1F)) {
+    return TRUE;
+  }
+  if (word >= 0x3000 && word <= 0x303F) {
+    if (word == 0x3005 || word == 0x3006 || word == 0x3021 || word == 0x3022 ||
+        word == 0x3023 || word == 0x3024 || word == 0x3025 || word == 0x3026 ||
+        word == 0x3027 || word == 0x3028 || word == 0x3029 || word == 0x3031 ||
+        word == 0x3032 || word == 0x3033 || word == 0x3034 || word == 0x3035) {
+      return TRUE;
+    }
+    return FALSE;
+  }
+  if (word >= 0xFF66 && word <= 0xFF9D) {
+    return TRUE;
+  }
+  return FALSE;
+}
+static FX_BOOL IsPunctuation(FX_DWORD word) {
+  if (word <= 0x007F) {
+    if ((special_chars[word] >> 3) & 1) {
+      return TRUE;
+    }
+  } else if (word >= 0x0080 && word <= 0x00FF) {
+    if (word == 0x0082 || word == 0x0084 || word == 0x0085 || word == 0x0091 ||
+        word == 0x0092 || word == 0x0093 || word <= 0x0094 || word == 0x0096 ||
+        word == 0x00B4 || word == 0x00B8) {
+      return TRUE;
+    }
+  } else if (word >= 0x2000 && word <= 0x206F) {
+    if (word == 0x2010 || word == 0x2011 || word == 0x2012 || word == 0x2013 ||
+        word == 0x2018 || word == 0x2019 || word == 0x201A || word == 0x201B ||
+        word == 0x201C || word == 0x201D || word == 0x201E || word == 0x201F ||
+        word == 0x2032 || word == 0x2033 || word == 0x2034 || word == 0x2035 ||
+        word == 0x2036 || word == 0x2037 || word == 0x203C || word == 0x203D ||
+        word == 0x203E || word == 0x2044) {
+      return TRUE;
+    }
+  } else if (word >= 0x3000 && word <= 0x303F) {
+    if (word == 0x3001 || word == 0x3002 || word == 0x3003 || word == 0x3005 ||
+        word == 0x3009 || word == 0x300A || word == 0x300B || word == 0x300C ||
+        word == 0x300D || word == 0x300F || word == 0x300E || word == 0x3010 ||
+        word == 0x3011 || word == 0x3014 || word == 0x3015 || word == 0x3016 ||
+        word == 0x3017 || word == 0x3018 || word == 0x3019 || word == 0x301A ||
+        word == 0x301B || word == 0x301D || word == 0x301E || word == 0x301F) {
+      return TRUE;
+    }
+  } else if (word >= 0xFE50 && word <= 0xFE6F) {
+    if ((word >= 0xFE50 && word <= 0xFE5E) || word == 0xFE63) {
+      return TRUE;
+    }
+  } else if (word >= 0xFF00 && word <= 0xFFEF) {
+    if (word == 0xFF01 || word == 0xFF02 || word == 0xFF07 || word == 0xFF08 ||
+        word == 0xFF09 || word == 0xFF0C || word == 0xFF0E || word == 0xFF0F ||
+        word == 0xFF1A || word == 0xFF1B || word == 0xFF1F || word == 0xFF3B ||
+        word == 0xFF3D || word == 0xFF40 || word == 0xFF5B || word == 0xFF5C ||
+        word == 0xFF5D || word == 0xFF61 || word == 0xFF62 || word == 0xFF63 ||
+        word == 0xFF64 || word == 0xFF65 || word == 0xFF9E || word == 0xFF9F) {
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+static FX_BOOL IsConnectiveSymbol(FX_DWORD word) {
+  if (word <= 0x007F) {
+    if ((special_chars[word] >> 5) & 1) {
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+static FX_BOOL IsOpenStylePunctuation(FX_DWORD word) {
+  if (word <= 0x007F) {
+    if ((special_chars[word] >> 2) & 1) {
+      return TRUE;
+    }
+  } else if (word == 0x300A || word == 0x300C || word == 0x300E ||
+             word == 0x3010 || word == 0x3014 || word == 0x3016 ||
+             word == 0x3018 || word == 0x301A || word == 0xFF08 ||
+             word == 0xFF3B || word == 0xFF5B || word == 0xFF62) {
+    return TRUE;
+  }
+  return FALSE;
+}
+static FX_BOOL IsCurrencySymbol(FX_WORD word) {
+  if (word == 0x0024 || word == 0x0080 || word == 0x00A2 || word == 0x00A3 ||
+      word == 0x00A4 || word == 0x00A5 || (word >= 0x20A0 && word <= 0x20CF) ||
+      word == 0xFE69 || word == 0xFF04 || word == 0xFFE0 || word == 0xFFE1 ||
+      word == 0xFFE5 || word == 0xFFE6) {
+    return TRUE;
+  }
+  return FALSE;
+}
+static FX_BOOL IsPrefixSymbol(FX_WORD word) {
+  if (IsCurrencySymbol(word)) {
+    return TRUE;
+  }
+  if (word == 0x2116) {
+    return TRUE;
+  }
+  return FALSE;
+}
+static FX_BOOL IsSpace(FX_WORD word) {
+  return word == 0x0020 || word == 0x3000;
+}
+static FX_BOOL NeedDivision(FX_WORD prevWord, FX_WORD curWord) {
+  if ((IsLatin(prevWord) || IsDigit(prevWord)) &&
+      (IsLatin(curWord) || IsDigit(curWord))) {
+    return FALSE;
+  }
+  if (IsSpace(curWord) || IsPunctuation(curWord)) {
+    return FALSE;
+  }
+  if (IsConnectiveSymbol(prevWord) || IsConnectiveSymbol(curWord)) {
+    return FALSE;
+  }
+  if (IsSpace(prevWord) || IsPunctuation(prevWord)) {
+    return TRUE;
+  }
+  if (IsPrefixSymbol(prevWord)) {
+    return FALSE;
+  }
+  if (IsPrefixSymbol(curWord) || IsCJK(curWord)) {
+    return TRUE;
+  }
+  if (IsCJK(prevWord)) {
+    return TRUE;
+  }
+  return FALSE;
+}
+void CTypeset::SplitLines(FX_BOOL bTypeset, FX_FLOAT fFontSize) {
+  ASSERT(m_pVT);
+  ASSERT(m_pSection);
+  int32_t nLineHead = 0;
+  int32_t nLineTail = 0;
+  FX_FLOAT fMaxX = 0.0f, fMaxY = 0.0f;
+  FX_FLOAT fLineWidth = 0.0f, fBackupLineWidth = 0.0f;
+  FX_FLOAT fLineAscent = 0.0f, fBackupLineAscent = 0.0f;
+  FX_FLOAT fLineDescent = 0.0f, fBackupLineDescent = 0.0f;
+  int32_t nWordStartPos = 0;
+  FX_BOOL bFullWord = FALSE;
+  int32_t nLineFullWordIndex = 0;
+  int32_t nCharIndex = 0;
+  CPVT_LineInfo line;
+  FX_FLOAT fWordWidth = 0;
+  FX_FLOAT fTypesetWidth = std::max(
+      m_pVT->GetPlateWidth() - m_pVT->GetLineIndent(m_pSection->m_SecInfo),
+      0.0f);
+  int32_t nTotalWords = m_pSection->m_WordArray.GetSize();
+  FX_BOOL bOpened = FALSE;
+  if (nTotalWords > 0) {
+    int32_t i = 0;
+    while (i < nTotalWords) {
+      CPVT_WordInfo* pWord = m_pSection->m_WordArray.GetAt(i);
+      CPVT_WordInfo* pOldWord = pWord;
+      if (i > 0) {
+        pOldWord = m_pSection->m_WordArray.GetAt(i - 1);
+      }
+      if (pWord) {
+        if (bTypeset) {
+          fLineAscent =
+              std::max(fLineAscent, m_pVT->GetWordAscent(*pWord, TRUE));
+          fLineDescent =
+              std::min(fLineDescent, m_pVT->GetWordDescent(*pWord, TRUE));
+          fWordWidth = m_pVT->GetWordWidth(*pWord);
+        } else {
+          fLineAscent =
+              std::max(fLineAscent, m_pVT->GetWordAscent(*pWord, fFontSize));
+          fLineDescent =
+              std::min(fLineDescent, m_pVT->GetWordDescent(*pWord, fFontSize));
+          fWordWidth = m_pVT->GetWordWidth(
+              pWord->nFontIndex, pWord->Word, m_pVT->m_wSubWord,
+              m_pVT->m_fCharSpace, m_pVT->m_nHorzScale, fFontSize,
+              pWord->fWordTail, 0);
+        }
+        if (!bOpened) {
+          if (IsOpenStylePunctuation(pWord->Word)) {
+            bOpened = TRUE;
+            bFullWord = TRUE;
+          } else if (pOldWord) {
+            if (NeedDivision(pOldWord->Word, pWord->Word)) {
+              bFullWord = TRUE;
+            }
+          }
+        } else {
+          if (!IsSpace(pWord->Word) && !IsOpenStylePunctuation(pWord->Word)) {
+            bOpened = FALSE;
+          }
+        }
+        if (bFullWord) {
+          bFullWord = FALSE;
+          if (nCharIndex > 0) {
+            nLineFullWordIndex++;
+          }
+          nWordStartPos = i;
+          fBackupLineWidth = fLineWidth;
+          fBackupLineAscent = fLineAscent;
+          fBackupLineDescent = fLineDescent;
+        }
+        nCharIndex++;
+      }
+      if (m_pVT->m_bLimitWidth && fTypesetWidth > 0 &&
+          fLineWidth + fWordWidth > fTypesetWidth) {
+        if (nLineFullWordIndex > 0) {
+          i = nWordStartPos;
+          fLineWidth = fBackupLineWidth;
+          fLineAscent = fBackupLineAscent;
+          fLineDescent = fBackupLineDescent;
+        }
+        if (nCharIndex == 1) {
+          fLineWidth = fWordWidth;
+          i++;
+        }
+        nLineTail = i - 1;
+        if (bTypeset) {
+          line.nBeginWordIndex = nLineHead;
+          line.nEndWordIndex = nLineTail;
+          line.nTotalWord = nLineTail - nLineHead + 1;
+          line.fLineWidth = fLineWidth;
+          line.fLineAscent = fLineAscent;
+          line.fLineDescent = fLineDescent;
+          m_pSection->AddLine(line);
+        }
+        fMaxY += (fLineAscent + m_pVT->GetLineLeading(m_pSection->m_SecInfo));
+        fMaxY += (-fLineDescent);
+        fMaxX = std::max(fLineWidth, fMaxX);
+        nLineHead = i;
+        fLineWidth = 0.0f;
+        fLineAscent = 0.0f;
+        fLineDescent = 0.0f;
+        nCharIndex = 0;
+        nLineFullWordIndex = 0;
+        bFullWord = FALSE;
+      } else {
+        fLineWidth += fWordWidth;
+        i++;
+      }
+    }
+    if (nLineHead <= nTotalWords - 1) {
+      nLineTail = nTotalWords - 1;
+      if (bTypeset) {
+        line.nBeginWordIndex = nLineHead;
+        line.nEndWordIndex = nLineTail;
+        line.nTotalWord = nLineTail - nLineHead + 1;
+        line.fLineWidth = fLineWidth;
+        line.fLineAscent = fLineAscent;
+        line.fLineDescent = fLineDescent;
+        m_pSection->AddLine(line);
+      }
+      fMaxY += (fLineAscent + m_pVT->GetLineLeading(m_pSection->m_SecInfo));
+      fMaxY += (-fLineDescent);
+      fMaxX = std::max(fLineWidth, fMaxX);
+    }
+  } else {
+    if (bTypeset) {
+      fLineAscent = m_pVT->GetLineAscent(m_pSection->m_SecInfo);
+      fLineDescent = m_pVT->GetLineDescent(m_pSection->m_SecInfo);
+    } else {
+      fLineAscent =
+          m_pVT->GetFontAscent(m_pVT->GetDefaultFontIndex(), fFontSize);
+      fLineDescent =
+          m_pVT->GetFontDescent(m_pVT->GetDefaultFontIndex(), fFontSize);
+    }
+    if (bTypeset) {
+      line.nBeginWordIndex = -1;
+      line.nEndWordIndex = -1;
+      line.nTotalWord = 0;
+      line.fLineWidth = 0;
+      line.fLineAscent = fLineAscent;
+      line.fLineDescent = fLineDescent;
+      m_pSection->AddLine(line);
+    }
+    fMaxY += (m_pVT->GetLineLeading(m_pSection->m_SecInfo) + fLineAscent +
+              (-fLineDescent));
+  }
+  m_rcRet = CPVT_FloatRect(0, 0, fMaxX, fMaxY);
+}
+void CTypeset::OutputLines() {
+  ASSERT(m_pVT);
+  ASSERT(m_pSection);
+  FX_FLOAT fMinX = 0.0f, fMinY = 0.0f, fMaxX = 0.0f, fMaxY = 0.0f;
+  FX_FLOAT fPosX = 0.0f, fPosY = 0.0f;
+  FX_FLOAT fLineIndent = m_pVT->GetLineIndent(m_pSection->m_SecInfo);
+  FX_FLOAT fTypesetWidth = std::max(m_pVT->GetPlateWidth() - fLineIndent, 0.0f);
+  switch (m_pVT->GetAlignment(m_pSection->m_SecInfo)) {
+    default:
+    case 0:
+      fMinX = 0.0f;
+      break;
+    case 1:
+      fMinX = (fTypesetWidth - m_rcRet.Width()) * PVT_HALF;
+      break;
+    case 2:
+      fMinX = fTypesetWidth - m_rcRet.Width();
+      break;
+  }
+  fMaxX = fMinX + m_rcRet.Width();
+  fMinY = 0.0f;
+  fMaxY = m_rcRet.Height();
+  int32_t nTotalLines = m_pSection->m_LineArray.GetSize();
+  if (nTotalLines > 0) {
+    m_pSection->m_SecInfo.nTotalLine = nTotalLines;
+    for (int32_t l = 0; l < nTotalLines; l++) {
+      if (CLine* pLine = m_pSection->m_LineArray.GetAt(l)) {
+        switch (m_pVT->GetAlignment(m_pSection->m_SecInfo)) {
+          default:
+          case 0:
+            fPosX = 0;
+            break;
+          case 1:
+            fPosX = (fTypesetWidth - pLine->m_LineInfo.fLineWidth) * PVT_HALF;
+            break;
+          case 2:
+            fPosX = fTypesetWidth - pLine->m_LineInfo.fLineWidth;
+            break;
+        }
+        fPosX += fLineIndent;
+        fPosY += m_pVT->GetLineLeading(m_pSection->m_SecInfo);
+        fPosY += pLine->m_LineInfo.fLineAscent;
+        pLine->m_LineInfo.fLineX = fPosX - fMinX;
+        pLine->m_LineInfo.fLineY = fPosY - fMinY;
+        for (int32_t w = pLine->m_LineInfo.nBeginWordIndex;
+             w <= pLine->m_LineInfo.nEndWordIndex; w++) {
+          if (CPVT_WordInfo* pWord = m_pSection->m_WordArray.GetAt(w)) {
+            pWord->fWordX = fPosX - fMinX;
+            if (pWord->pWordProps) {
+              switch (pWord->pWordProps->nScriptType) {
+                default:
+                case PVTWORD_SCRIPT_NORMAL:
+                  pWord->fWordY = fPosY - fMinY;
+                  break;
+                case PVTWORD_SCRIPT_SUPER:
+                  pWord->fWordY = fPosY - m_pVT->GetWordAscent(*pWord) - fMinY;
+                  break;
+                case PVTWORD_SCRIPT_SUB:
+                  pWord->fWordY = fPosY - m_pVT->GetWordDescent(*pWord) - fMinY;
+                  break;
+              }
+            } else {
+              pWord->fWordY = fPosY - fMinY;
+            }
+            fPosX += m_pVT->GetWordWidth(*pWord);
+          }
+        }
+        fPosY += (-pLine->m_LineInfo.fLineDescent);
+      }
+    }
+  }
+  m_rcRet = CPVT_FloatRect(fMinX, fMinY, fMaxX, fMaxY);
+}
+CPDF_VariableText::CPDF_VariableText()
+    : m_nLimitChar(0),
+      m_nCharArray(0),
+      m_bMultiLine(FALSE),
+      m_bLimitWidth(FALSE),
+      m_bAutoFontSize(FALSE),
+      m_nAlignment(0),
+      m_fLineLeading(0.0f),
+      m_fCharSpace(0.0f),
+      m_nHorzScale(100),
+      m_wSubWord(0),
+      m_fFontSize(0.0f),
+      m_bInitial(FALSE),
+      m_bRichText(FALSE),
+      m_pVTProvider(NULL),
+      m_pVTIterator(NULL) {}
+CPDF_VariableText::~CPDF_VariableText() {
+  delete m_pVTIterator;
+  m_pVTIterator = NULL;
+  ResetAll();
+}
+void CPDF_VariableText::Initialize() {
+  if (!m_bInitial) {
+    CPVT_SectionInfo secinfo;
+    if (m_bRichText) {
+      secinfo.pSecProps = new CPVT_SecProps(0.0f, 0.0f, 0);
+      secinfo.pWordProps = new CPVT_WordProps(GetDefaultFontIndex(),
+                                              PVT_DEFAULT_FONTSIZE, 0, 0, 0);
+    }
+    CPVT_WordPlace place;
+    place.nSecIndex = 0;
+    AddSection(place, secinfo);
+    CPVT_LineInfo lineinfo;
+    lineinfo.fLineAscent = GetFontAscent(GetDefaultFontIndex(), GetFontSize());
+    lineinfo.fLineDescent =
+        GetFontDescent(GetDefaultFontIndex(), GetFontSize());
+    AddLine(place, lineinfo);
+    if (CSection* pSection = m_SectionArray.GetAt(0)) {
+      pSection->ResetLinePlace();
+    }
+    m_bInitial = TRUE;
+  }
+}
+void CPDF_VariableText::ResetAll() {
+  m_bInitial = FALSE;
+  ResetSectionArray();
+}
+CPVT_WordPlace CPDF_VariableText::InsertWord(const CPVT_WordPlace& place,
+                                             FX_WORD word,
+                                             int32_t charset,
+                                             const CPVT_WordProps* pWordProps) {
+  int32_t nTotlaWords = GetTotalWords();
+  if (m_nLimitChar > 0 && nTotlaWords >= m_nLimitChar) {
+    return place;
+  }
+  if (m_nCharArray > 0 && nTotlaWords >= m_nCharArray) {
+    return place;
+  }
+  CPVT_WordPlace newplace = place;
+  newplace.nWordIndex++;
+  if (m_bRichText) {
+    CPVT_WordProps* pNewProps =
+        pWordProps ? new CPVT_WordProps(*pWordProps) : new CPVT_WordProps();
+    pNewProps->nFontIndex =
+        GetWordFontIndex(word, charset, pWordProps->nFontIndex);
+    return AddWord(newplace, CPVT_WordInfo(word, charset, -1, pNewProps));
+  }
+  int32_t nFontIndex =
+      GetSubWord() > 0 ? GetDefaultFontIndex()
+                       : GetWordFontIndex(word, charset, GetDefaultFontIndex());
+  return AddWord(newplace, CPVT_WordInfo(word, charset, nFontIndex, NULL));
+}
+CPVT_WordPlace CPDF_VariableText::InsertSection(
+    const CPVT_WordPlace& place,
+    const CPVT_SecProps* pSecProps,
+    const CPVT_WordProps* pWordProps) {
+  int32_t nTotlaWords = GetTotalWords();
+  if (m_nLimitChar > 0 && nTotlaWords >= m_nLimitChar) {
+    return place;
+  }
+  if (m_nCharArray > 0 && nTotlaWords >= m_nCharArray) {
+    return place;
+  }
+  if (!m_bMultiLine) {
+    return place;
+  }
+  CPVT_WordPlace wordplace = place;
+  UpdateWordPlace(wordplace);
+  CPVT_WordPlace newplace = place;
+  if (CSection* pSection = m_SectionArray.GetAt(wordplace.nSecIndex)) {
+    CPVT_WordPlace NewPlace(wordplace.nSecIndex + 1, 0, -1);
+    CPVT_SectionInfo secinfo;
+    if (m_bRichText) {
+      if (pSecProps) {
+        secinfo.pSecProps = new CPVT_SecProps(*pSecProps);
+      }
+      if (pWordProps) {
+        secinfo.pWordProps = new CPVT_WordProps(*pWordProps);
+      }
+    }
+    AddSection(NewPlace, secinfo);
+    newplace = NewPlace;
+    if (CSection* pNewSection = m_SectionArray.GetAt(NewPlace.nSecIndex)) {
+      for (int32_t w = wordplace.nWordIndex + 1,
+                   sz = pSection->m_WordArray.GetSize();
+           w < sz; w++) {
+        if (CPVT_WordInfo* pWord = pSection->m_WordArray.GetAt(w)) {
+          NewPlace.nWordIndex++;
+          pNewSection->AddWord(NewPlace, *pWord);
+        }
+      }
+    }
+    ClearSectionRightWords(wordplace);
+  }
+  return newplace;
+}
+CPVT_WordPlace CPDF_VariableText::InsertText(const CPVT_WordPlace& place,
+                                             const FX_WCHAR* text,
+                                             int32_t charset,
+                                             const CPVT_SecProps* pSecProps,
+                                             const CPVT_WordProps* pProps) {
+  CFX_WideString swText = text;
+  CPVT_WordPlace wp = place;
+  for (int32_t i = 0, sz = swText.GetLength(); i < sz; i++) {
+    CPVT_WordPlace oldwp = wp;
+    FX_WORD word = swText.GetAt(i);
+    switch (word) {
+      case 0x0D:
+        if (m_bMultiLine) {
+          if (swText.GetAt(i + 1) == 0x0A) {
+            i += 1;
+          }
+          wp = InsertSection(wp, pSecProps, pProps);
+        }
+        break;
+      case 0x0A:
+        if (m_bMultiLine) {
+          if (swText.GetAt(i + 1) == 0x0D) {
+            i += 1;
+          }
+          wp = InsertSection(wp, pSecProps, pProps);
+        }
+        break;
+      case 0x09:
+        word = 0x20;
+      default:
+        wp = InsertWord(wp, word, charset, pProps);
+        break;
+    }
+    if (wp == oldwp) {
+      break;
+    }
+  }
+  return wp;
+}
+CPVT_WordPlace CPDF_VariableText::DeleteWords(
+    const CPVT_WordRange& PlaceRange) {
+  FX_BOOL bLastSecPos = FALSE;
+  if (CSection* pSection = m_SectionArray.GetAt(PlaceRange.EndPos.nSecIndex)) {
+    bLastSecPos = (PlaceRange.EndPos == pSection->GetEndWordPlace());
+  }
+  ClearWords(PlaceRange);
+  if (PlaceRange.BeginPos.nSecIndex != PlaceRange.EndPos.nSecIndex) {
+    ClearEmptySections(PlaceRange);
+    if (!bLastSecPos) {
+      LinkLatterSection(PlaceRange.BeginPos);
+    }
+  }
+  return PlaceRange.BeginPos;
+}
+CPVT_WordPlace CPDF_VariableText::DeleteWord(const CPVT_WordPlace& place) {
+  return ClearRightWord(AdjustLineHeader(place, TRUE));
+}
+CPVT_WordPlace CPDF_VariableText::BackSpaceWord(const CPVT_WordPlace& place) {
+  return ClearLeftWord(AdjustLineHeader(place, TRUE));
+}
+void CPDF_VariableText::SetText(const FX_WCHAR* text,
+                                int32_t charset,
+                                const CPVT_SecProps* pSecProps,
+                                const CPVT_WordProps* pWordProps) {
+  DeleteWords(CPVT_WordRange(GetBeginWordPlace(), GetEndWordPlace()));
+  CFX_WideString swText = text;
+  CPVT_WordPlace wp(0, 0, -1);
+  CPVT_SectionInfo secinfo;
+  if (m_bRichText) {
+    if (pSecProps) {
+      secinfo.pSecProps = new CPVT_SecProps(*pSecProps);
+    }
+    if (pWordProps) {
+      secinfo.pWordProps = new CPVT_WordProps(*pWordProps);
+    }
+  }
+  if (CSection* pSection = m_SectionArray.GetAt(0)) {
+    pSection->m_SecInfo = secinfo;
+  }
+  int32_t nCharCount = 0;
+  for (int32_t i = 0, sz = swText.GetLength(); i < sz; i++) {
+    if (m_nLimitChar > 0 && nCharCount >= m_nLimitChar) {
+      break;
+    }
+    if (m_nCharArray > 0 && nCharCount >= m_nCharArray) {
+      break;
+    }
+    FX_WORD word = swText.GetAt(i);
+    switch (word) {
+      case 0x0D:
+        if (m_bMultiLine) {
+          if (swText.GetAt(i + 1) == 0x0A) {
+            i += 1;
+          }
+          wp.nSecIndex++;
+          wp.nLineIndex = 0;
+          wp.nWordIndex = -1;
+          AddSection(wp, secinfo);
+        }
+        break;
+      case 0x0A:
+        if (m_bMultiLine) {
+          if (swText.GetAt(i + 1) == 0x0D) {
+            i += 1;
+          }
+          wp.nSecIndex++;
+          wp.nLineIndex = 0;
+          wp.nWordIndex = -1;
+          AddSection(wp, secinfo);
+        }
+        break;
+      case 0x09:
+        word = 0x20;
+      default:
+        wp = InsertWord(wp, word, charset, pWordProps);
+        break;
+    }
+    nCharCount++;
+  }
+}
+void CPDF_VariableText::UpdateWordPlace(CPVT_WordPlace& place) const {
+  if (place.nSecIndex < 0) {
+    place = GetBeginWordPlace();
+  }
+  if (place.nSecIndex >= m_SectionArray.GetSize()) {
+    place = GetEndWordPlace();
+  }
+  place = AdjustLineHeader(place, TRUE);
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    pSection->UpdateWordPlace(place);
+  }
+}
+int32_t CPDF_VariableText::WordPlaceToWordIndex(
+    const CPVT_WordPlace& place) const {
+  CPVT_WordPlace newplace = place;
+  UpdateWordPlace(newplace);
+  int32_t nIndex = 0;
+  int32_t i = 0;
+  int32_t sz = 0;
+  for (i = 0, sz = m_SectionArray.GetSize(); i < sz && i < newplace.nSecIndex;
+       i++) {
+    if (CSection* pSection = m_SectionArray.GetAt(i)) {
+      nIndex += pSection->m_WordArray.GetSize();
+      if (i != m_SectionArray.GetSize() - 1) {
+        nIndex += PVT_RETURN_LENGTH;
+      }
+    }
+  }
+  if (i >= 0 && i < m_SectionArray.GetSize()) {
+    nIndex += newplace.nWordIndex + PVT_RETURN_LENGTH;
+  }
+  return nIndex;
+}
+CPVT_WordPlace CPDF_VariableText::WordIndexToWordPlace(int32_t index) const {
+  CPVT_WordPlace place = GetBeginWordPlace();
+  int32_t nOldIndex = 0, nIndex = 0;
+  FX_BOOL bFind = FALSE;
+  for (int32_t i = 0, sz = m_SectionArray.GetSize(); i < sz; i++) {
+    if (CSection* pSection = m_SectionArray.GetAt(i)) {
+      nIndex += pSection->m_WordArray.GetSize();
+      if (nIndex == index) {
+        place = pSection->GetEndWordPlace();
+        bFind = TRUE;
+        break;
+      } else if (nIndex > index) {
+        place.nSecIndex = i;
+        place.nWordIndex = index - nOldIndex - 1;
+        pSection->UpdateWordPlace(place);
+        bFind = TRUE;
+        break;
+      }
+      if (i != m_SectionArray.GetSize() - 1) {
+        nIndex += PVT_RETURN_LENGTH;
+      }
+      nOldIndex = nIndex;
+    }
+  }
+  if (!bFind) {
+    place = GetEndWordPlace();
+  }
+  return place;
+}
+CPVT_WordPlace CPDF_VariableText::GetBeginWordPlace() const {
+  return m_bInitial ? CPVT_WordPlace(0, 0, -1) : CPVT_WordPlace();
+}
+CPVT_WordPlace CPDF_VariableText::GetEndWordPlace() const {
+  if (CSection* pSection = m_SectionArray.GetAt(m_SectionArray.GetSize() - 1)) {
+    return pSection->GetEndWordPlace();
+  }
+  return CPVT_WordPlace();
+}
+CPVT_WordPlace CPDF_VariableText::GetPrevWordPlace(
+    const CPVT_WordPlace& place) const {
+  if (place.nSecIndex < 0) {
+    return GetBeginWordPlace();
+  }
+  if (place.nSecIndex >= m_SectionArray.GetSize()) {
+    return GetEndWordPlace();
+  }
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    if (place.WordCmp(pSection->GetBeginWordPlace()) <= 0) {
+      if (CSection* pPrevSection = m_SectionArray.GetAt(place.nSecIndex - 1)) {
+        return pPrevSection->GetEndWordPlace();
+      }
+      return GetBeginWordPlace();
+    }
+    return pSection->GetPrevWordPlace(place);
+  }
+  return place;
+}
+CPVT_WordPlace CPDF_VariableText::GetNextWordPlace(
+    const CPVT_WordPlace& place) const {
+  if (place.nSecIndex < 0) {
+    return GetBeginWordPlace();
+  }
+  if (place.nSecIndex >= m_SectionArray.GetSize()) {
+    return GetEndWordPlace();
+  }
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    if (place.WordCmp(pSection->GetEndWordPlace()) >= 0) {
+      if (CSection* pNextSection = m_SectionArray.GetAt(place.nSecIndex + 1)) {
+        return pNextSection->GetBeginWordPlace();
+      }
+      return GetEndWordPlace();
+    }
+    return pSection->GetNextWordPlace(place);
+  }
+  return place;
+}
+CPVT_WordPlace CPDF_VariableText::SearchWordPlace(
+    const CFX_FloatPoint& point) const {
+  CFX_FloatPoint pt = OutToIn(point);
+  CPVT_WordPlace place = GetBeginWordPlace();
+  int32_t nLeft = 0;
+  int32_t nRight = m_SectionArray.GetSize() - 1;
+  int32_t nMid = m_SectionArray.GetSize() / 2;
+  FX_BOOL bUp = TRUE;
+  FX_BOOL bDown = TRUE;
+  while (nLeft <= nRight) {
+    if (CSection* pSection = m_SectionArray.GetAt(nMid)) {
+      if (IsFloatBigger(pt.y, pSection->m_SecInfo.rcSection.top)) {
+        bUp = FALSE;
+      }
+      if (IsFloatBigger(pSection->m_SecInfo.rcSection.bottom, pt.y)) {
+        bDown = FALSE;
+      }
+      if (IsFloatSmaller(pt.y, pSection->m_SecInfo.rcSection.top)) {
+        nRight = nMid - 1;
+        nMid = (nLeft + nRight) / 2;
+        continue;
+      } else if (IsFloatBigger(pt.y, pSection->m_SecInfo.rcSection.bottom)) {
+        nLeft = nMid + 1;
+        nMid = (nLeft + nRight) / 2;
+        continue;
+      } else {
+        place = pSection->SearchWordPlace(
+            CFX_FloatPoint(pt.x - pSection->m_SecInfo.rcSection.left,
+                           pt.y - pSection->m_SecInfo.rcSection.top));
+        place.nSecIndex = nMid;
+        return place;
+      }
+    } else {
+      break;
+    }
+  }
+  if (bUp) {
+    place = GetBeginWordPlace();
+  }
+  if (bDown) {
+    place = GetEndWordPlace();
+  }
+  return place;
+}
+CPVT_WordPlace CPDF_VariableText::GetUpWordPlace(
+    const CPVT_WordPlace& place,
+    const CFX_FloatPoint& point) const {
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    CPVT_WordPlace temp = place;
+    CFX_FloatPoint pt = OutToIn(point);
+    if (temp.nLineIndex-- > 0) {
+      return pSection->SearchWordPlace(
+          pt.x - pSection->m_SecInfo.rcSection.left, temp);
+    }
+    if (temp.nSecIndex-- > 0) {
+      if (CSection* pLastSection = m_SectionArray.GetAt(temp.nSecIndex)) {
+        temp.nLineIndex = pLastSection->m_LineArray.GetSize() - 1;
+        return pLastSection->SearchWordPlace(
+            pt.x - pLastSection->m_SecInfo.rcSection.left, temp);
+      }
+    }
+  }
+  return place;
+}
+CPVT_WordPlace CPDF_VariableText::GetDownWordPlace(
+    const CPVT_WordPlace& place,
+    const CFX_FloatPoint& point) const {
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    CPVT_WordPlace temp = place;
+    CFX_FloatPoint pt = OutToIn(point);
+    if (temp.nLineIndex++ < pSection->m_LineArray.GetSize() - 1) {
+      return pSection->SearchWordPlace(
+          pt.x - pSection->m_SecInfo.rcSection.left, temp);
+    }
+    if (temp.nSecIndex++ < m_SectionArray.GetSize() - 1) {
+      if (CSection* pNextSection = m_SectionArray.GetAt(temp.nSecIndex)) {
+        temp.nLineIndex = 0;
+        return pNextSection->SearchWordPlace(
+            pt.x - pSection->m_SecInfo.rcSection.left, temp);
+      }
+    }
+  }
+  return place;
+}
+CPVT_WordPlace CPDF_VariableText::GetLineBeginPlace(
+    const CPVT_WordPlace& place) const {
+  return CPVT_WordPlace(place.nSecIndex, place.nLineIndex, -1);
+}
+CPVT_WordPlace CPDF_VariableText::GetLineEndPlace(
+    const CPVT_WordPlace& place) const {
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    if (CLine* pLine = pSection->m_LineArray.GetAt(place.nLineIndex))
+      return pLine->GetEndWordPlace();
+  }
+  return place;
+}
+CPVT_WordPlace CPDF_VariableText::GetSectionBeginPlace(
+    const CPVT_WordPlace& place) const {
+  return CPVT_WordPlace(place.nSecIndex, 0, -1);
+}
+CPVT_WordPlace CPDF_VariableText::GetSectionEndPlace(
+    const CPVT_WordPlace& place) const {
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    return pSection->GetEndWordPlace();
+  }
+  return place;
+}
+int32_t CPDF_VariableText::GetTotalWords() const {
+  int32_t nTotal = 0;
+  for (int32_t i = 0, sz = m_SectionArray.GetSize(); i < sz; i++)
+    if (CSection* pSection = m_SectionArray.GetAt(i)) {
+      nTotal += (pSection->m_WordArray.GetSize() + PVT_RETURN_LENGTH);
+    }
+  return nTotal - PVT_RETURN_LENGTH;
+}
+void CPDF_VariableText::ResetSectionArray() {
+  for (int32_t s = 0, sz = m_SectionArray.GetSize(); s < sz; s++) {
+    delete m_SectionArray.GetAt(s);
+  }
+  m_SectionArray.RemoveAll();
+}
+CPVT_WordPlace CPDF_VariableText::AddSection(const CPVT_WordPlace& place,
+                                             const CPVT_SectionInfo& secinfo) {
+  if (IsValid() && !m_bMultiLine) {
+    return place;
+  }
+  int32_t nSecIndex =
+      std::max(std::min(place.nSecIndex, m_SectionArray.GetSize()), 0);
+  CSection* pSection = new CSection(this);
+  pSection->m_SecInfo = secinfo;
+  pSection->SecPlace.nSecIndex = nSecIndex;
+  if (nSecIndex == m_SectionArray.GetSize()) {
+    m_SectionArray.Add(pSection);
+  } else {
+    m_SectionArray.InsertAt(nSecIndex, pSection);
+  }
+  return place;
+}
+CPVT_WordPlace CPDF_VariableText::AddLine(const CPVT_WordPlace& place,
+                                          const CPVT_LineInfo& lineinfo) {
+  if (m_SectionArray.IsEmpty()) {
+    return place;
+  }
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    return pSection->AddLine(lineinfo);
+  }
+  return place;
+}
+CPVT_WordPlace CPDF_VariableText::AddWord(const CPVT_WordPlace& place,
+                                          const CPVT_WordInfo& wordinfo) {
+  if (m_SectionArray.GetSize() <= 0) {
+    return place;
+  }
+  CPVT_WordPlace newplace = place;
+  newplace.nSecIndex =
+      std::max(std::min(newplace.nSecIndex, m_SectionArray.GetSize() - 1), 0);
+  if (CSection* pSection = m_SectionArray.GetAt(newplace.nSecIndex)) {
+    return pSection->AddWord(newplace, wordinfo);
+  }
+  return place;
+}
+FX_BOOL CPDF_VariableText::GetWordInfo(const CPVT_WordPlace& place,
+                                       CPVT_WordInfo& wordinfo) {
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    if (CPVT_WordInfo* pWord = pSection->m_WordArray.GetAt(place.nWordIndex)) {
+      wordinfo = *pWord;
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_VariableText::SetWordInfo(const CPVT_WordPlace& place,
+                                       const CPVT_WordInfo& wordinfo) {
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    if (CPVT_WordInfo* pWord = pSection->m_WordArray.GetAt(place.nWordIndex)) {
+      *pWord = wordinfo;
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_VariableText::GetLineInfo(const CPVT_WordPlace& place,
+                                       CPVT_LineInfo& lineinfo) {
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    if (CLine* pLine = pSection->m_LineArray.GetAt(place.nLineIndex)) {
+      lineinfo = pLine->m_LineInfo;
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_VariableText::GetSectionInfo(const CPVT_WordPlace& place,
+                                          CPVT_SectionInfo& secinfo) {
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    secinfo = pSection->m_SecInfo;
+    return TRUE;
+  }
+  return FALSE;
+}
+CFX_FloatRect CPDF_VariableText::GetContentRect() const {
+  return InToOut(CPVT_FloatRect(CPDF_EditContainer::GetContentRect()));
+}
+FX_FLOAT CPDF_VariableText::GetWordFontSize(const CPVT_WordInfo& WordInfo,
+                                            FX_BOOL bFactFontSize) {
+  return m_bRichText && WordInfo.pWordProps
+             ? (WordInfo.pWordProps->nScriptType == PVTWORD_SCRIPT_NORMAL ||
+                        bFactFontSize
+                    ? WordInfo.pWordProps->fFontSize
+                    : WordInfo.pWordProps->fFontSize * PVT_HALF)
+             : GetFontSize();
+}
+int32_t CPDF_VariableText::GetWordFontIndex(const CPVT_WordInfo& WordInfo) {
+  return m_bRichText && WordInfo.pWordProps ? WordInfo.pWordProps->nFontIndex
+                                            : WordInfo.nFontIndex;
+}
+FX_FLOAT CPDF_VariableText::GetWordWidth(int32_t nFontIndex,
+                                         FX_WORD Word,
+                                         FX_WORD SubWord,
+                                         FX_FLOAT fCharSpace,
+                                         int32_t nHorzScale,
+                                         FX_FLOAT fFontSize,
+                                         FX_FLOAT fWordTail,
+                                         int32_t nWordStyle) {
+  return (GetCharWidth(nFontIndex, Word, SubWord, nWordStyle) * fFontSize *
+              PVT_FONTSCALE +
+          fCharSpace) *
+             nHorzScale * PVT_PERCENT +
+         fWordTail;
+}
+FX_FLOAT CPDF_VariableText::GetWordWidth(const CPVT_WordInfo& WordInfo) {
+  return GetWordWidth(
+      GetWordFontIndex(WordInfo), WordInfo.Word, GetSubWord(),
+      GetCharSpace(WordInfo), GetHorzScale(WordInfo), GetWordFontSize(WordInfo),
+      WordInfo.fWordTail,
+      WordInfo.pWordProps ? WordInfo.pWordProps->nWordStyle : 0);
+}
+FX_FLOAT CPDF_VariableText::GetLineAscent(const CPVT_SectionInfo& SecInfo) {
+  return m_bRichText && SecInfo.pWordProps
+             ? GetFontAscent(SecInfo.pWordProps->nFontIndex,
+                             SecInfo.pWordProps->fFontSize)
+             : GetFontAscent(GetDefaultFontIndex(), GetFontSize());
+}
+FX_FLOAT CPDF_VariableText::GetLineDescent(const CPVT_SectionInfo& SecInfo) {
+  return m_bRichText && SecInfo.pWordProps
+             ? GetFontDescent(SecInfo.pWordProps->nFontIndex,
+                              SecInfo.pWordProps->fFontSize)
+             : GetFontDescent(GetDefaultFontIndex(), GetFontSize());
+}
+FX_FLOAT CPDF_VariableText::GetFontAscent(int32_t nFontIndex,
+                                          FX_FLOAT fFontSize) {
+  return (FX_FLOAT)GetTypeAscent(nFontIndex) * fFontSize * PVT_FONTSCALE;
+}
+FX_FLOAT CPDF_VariableText::GetFontDescent(int32_t nFontIndex,
+                                           FX_FLOAT fFontSize) {
+  return (FX_FLOAT)GetTypeDescent(nFontIndex) * fFontSize * PVT_FONTSCALE;
+}
+FX_FLOAT CPDF_VariableText::GetWordAscent(const CPVT_WordInfo& WordInfo,
+                                          FX_FLOAT fFontSize) {
+  return GetFontAscent(GetWordFontIndex(WordInfo), fFontSize);
+}
+FX_FLOAT CPDF_VariableText::GetWordDescent(const CPVT_WordInfo& WordInfo,
+                                           FX_FLOAT fFontSize) {
+  return GetFontDescent(GetWordFontIndex(WordInfo), fFontSize);
+}
+FX_FLOAT CPDF_VariableText::GetWordAscent(const CPVT_WordInfo& WordInfo,
+                                          FX_BOOL bFactFontSize) {
+  return GetFontAscent(GetWordFontIndex(WordInfo),
+                       GetWordFontSize(WordInfo, bFactFontSize));
+}
+FX_FLOAT CPDF_VariableText::GetWordDescent(const CPVT_WordInfo& WordInfo,
+                                           FX_BOOL bFactFontSize) {
+  return GetFontDescent(GetWordFontIndex(WordInfo),
+                        GetWordFontSize(WordInfo, bFactFontSize));
+}
+FX_FLOAT CPDF_VariableText::GetLineLeading(const CPVT_SectionInfo& SecInfo) {
+  return m_bRichText && SecInfo.pSecProps ? SecInfo.pSecProps->fLineLeading
+                                          : m_fLineLeading;
+}
+FX_FLOAT CPDF_VariableText::GetLineIndent(const CPVT_SectionInfo& SecInfo) {
+  return m_bRichText && SecInfo.pSecProps ? SecInfo.pSecProps->fLineIndent
+                                          : 0.0f;
+}
+int32_t CPDF_VariableText::GetAlignment(const CPVT_SectionInfo& SecInfo) {
+  return m_bRichText && SecInfo.pSecProps ? SecInfo.pSecProps->nAlignment
+                                          : m_nAlignment;
+}
+FX_FLOAT CPDF_VariableText::GetCharSpace(const CPVT_WordInfo& WordInfo) {
+  return m_bRichText && WordInfo.pWordProps ? WordInfo.pWordProps->fCharSpace
+                                            : m_fCharSpace;
+}
+int32_t CPDF_VariableText::GetHorzScale(const CPVT_WordInfo& WordInfo) {
+  return m_bRichText && WordInfo.pWordProps ? WordInfo.pWordProps->nHorzScale
+                                            : m_nHorzScale;
+}
+void CPDF_VariableText::ClearSectionRightWords(const CPVT_WordPlace& place) {
+  CPVT_WordPlace wordplace = AdjustLineHeader(place, TRUE);
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    for (int32_t w = pSection->m_WordArray.GetSize() - 1;
+         w > wordplace.nWordIndex; w--) {
+      delete pSection->m_WordArray.GetAt(w);
+      pSection->m_WordArray.RemoveAt(w);
+    }
+  }
+}
+CPVT_WordPlace CPDF_VariableText::AdjustLineHeader(const CPVT_WordPlace& place,
+                                                   FX_BOOL bPrevOrNext) const {
+  if (place.nWordIndex < 0 && place.nLineIndex > 0) {
+    return bPrevOrNext ? GetPrevWordPlace(place) : GetNextWordPlace(place);
+  }
+  return place;
+}
+FX_BOOL CPDF_VariableText::ClearEmptySection(const CPVT_WordPlace& place) {
+  if (place.nSecIndex == 0 && m_SectionArray.GetSize() == 1) {
+    return FALSE;
+  }
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    if (pSection->m_WordArray.GetSize() == 0) {
+      delete pSection;
+      m_SectionArray.RemoveAt(place.nSecIndex);
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+void CPDF_VariableText::ClearEmptySections(const CPVT_WordRange& PlaceRange) {
+  CPVT_WordPlace wordplace;
+  for (int32_t s = PlaceRange.EndPos.nSecIndex;
+       s > PlaceRange.BeginPos.nSecIndex; s--) {
+    wordplace.nSecIndex = s;
+    ClearEmptySection(wordplace);
+  }
+}
+void CPDF_VariableText::LinkLatterSection(const CPVT_WordPlace& place) {
+  CPVT_WordPlace oldplace = AdjustLineHeader(place, TRUE);
+  if (CSection* pNextSection = m_SectionArray.GetAt(place.nSecIndex + 1)) {
+    if (CSection* pSection = m_SectionArray.GetAt(oldplace.nSecIndex)) {
+      for (int32_t w = 0, sz = pNextSection->m_WordArray.GetSize(); w < sz;
+           w++) {
+        if (CPVT_WordInfo* pWord = pNextSection->m_WordArray.GetAt(w)) {
+          oldplace.nWordIndex++;
+          pSection->AddWord(oldplace, *pWord);
+        }
+      }
+    }
+    delete pNextSection;
+    m_SectionArray.RemoveAt(place.nSecIndex + 1);
+  }
+}
+void CPDF_VariableText::ClearWords(const CPVT_WordRange& PlaceRange) {
+  CPVT_WordRange NewRange;
+  NewRange.BeginPos = AdjustLineHeader(PlaceRange.BeginPos, TRUE);
+  NewRange.EndPos = AdjustLineHeader(PlaceRange.EndPos, TRUE);
+  for (int32_t s = NewRange.EndPos.nSecIndex; s >= NewRange.BeginPos.nSecIndex;
+       s--) {
+    if (CSection* pSection = m_SectionArray.GetAt(s)) {
+      pSection->ClearWords(NewRange);
+    }
+  }
+}
+CPVT_WordPlace CPDF_VariableText::ClearLeftWord(const CPVT_WordPlace& place) {
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    CPVT_WordPlace leftplace = GetPrevWordPlace(place);
+    if (leftplace != place) {
+      if (leftplace.nSecIndex != place.nSecIndex) {
+        if (pSection->m_WordArray.GetSize() == 0) {
+          ClearEmptySection(place);
+        } else {
+          LinkLatterSection(leftplace);
+        }
+      } else {
+        pSection->ClearWord(place);
+      }
+    }
+    return leftplace;
+  }
+  return place;
+}
+CPVT_WordPlace CPDF_VariableText::ClearRightWord(const CPVT_WordPlace& place) {
+  if (CSection* pSection = m_SectionArray.GetAt(place.nSecIndex)) {
+    CPVT_WordPlace rightplace =
+        AdjustLineHeader(GetNextWordPlace(place), FALSE);
+    if (rightplace != place) {
+      if (rightplace.nSecIndex != place.nSecIndex) {
+        LinkLatterSection(place);
+      } else {
+        pSection->ClearWord(rightplace);
+      }
+    }
+  }
+  return place;
+}
+void CPDF_VariableText::RearrangeAll() {
+  Rearrange(CPVT_WordRange(GetBeginWordPlace(), GetEndWordPlace()));
+}
+void CPDF_VariableText::RearrangePart(const CPVT_WordRange& PlaceRange) {
+  Rearrange(PlaceRange);
+}
+CPVT_FloatRect CPDF_VariableText::Rearrange(const CPVT_WordRange& PlaceRange) {
+  CPVT_FloatRect rcRet;
+  if (IsValid()) {
+    if (m_bAutoFontSize) {
+      SetFontSize(GetAutoFontSize());
+      rcRet = RearrangeSections(
+          CPVT_WordRange(GetBeginWordPlace(), GetEndWordPlace()));
+    } else {
+      rcRet = RearrangeSections(PlaceRange);
+    }
+  }
+  SetContentRect(rcRet);
+  return rcRet;
+}
+FX_FLOAT CPDF_VariableText::GetAutoFontSize() {
+  int32_t nTotal = sizeof(gFontSizeSteps) / sizeof(uint8_t);
+  if (IsMultiLine()) {
+    nTotal /= 4;
+  }
+  if (nTotal <= 0) {
+    return 0;
+  }
+  if (GetPlateWidth() <= 0) {
+    return 0;
+  }
+  int32_t nLeft = 0;
+  int32_t nRight = nTotal - 1;
+  int32_t nMid = nTotal / 2;
+  while (nLeft <= nRight) {
+    if (IsBigger(gFontSizeSteps[nMid])) {
+      nRight = nMid - 1;
+      nMid = (nLeft + nRight) / 2;
+      continue;
+    } else {
+      nLeft = nMid + 1;
+      nMid = (nLeft + nRight) / 2;
+      continue;
+    }
+  }
+  return (FX_FLOAT)gFontSizeSteps[nMid];
+}
+FX_BOOL CPDF_VariableText::IsBigger(FX_FLOAT fFontSize) {
+  FX_BOOL bBigger = FALSE;
+  CPVT_Size szTotal;
+  for (int32_t s = 0, sz = m_SectionArray.GetSize(); s < sz; s++) {
+    if (CSection* pSection = m_SectionArray.GetAt(s)) {
+      CPVT_Size size = pSection->GetSectionSize(fFontSize);
+      szTotal.x = std::max(size.x, szTotal.x);
+      szTotal.y += size.y;
+      if (IsFloatBigger(szTotal.x, GetPlateWidth()) ||
+          IsFloatBigger(szTotal.y, GetPlateHeight())) {
+        bBigger = TRUE;
+        break;
+      }
+    }
+  }
+  return bBigger;
+}
+CPVT_FloatRect CPDF_VariableText::RearrangeSections(
+    const CPVT_WordRange& PlaceRange) {
+  CPVT_WordPlace place;
+  FX_FLOAT fPosY = 0;
+  FX_FLOAT fOldHeight;
+  int32_t nSSecIndex = PlaceRange.BeginPos.nSecIndex;
+  int32_t nESecIndex = PlaceRange.EndPos.nSecIndex;
+  CPVT_FloatRect rcRet;
+  for (int32_t s = 0, sz = m_SectionArray.GetSize(); s < sz; s++) {
+    place.nSecIndex = s;
+    if (CSection* pSection = m_SectionArray.GetAt(s)) {
+      pSection->SecPlace = place;
+      CPVT_FloatRect rcSec = pSection->m_SecInfo.rcSection;
+      if (s >= nSSecIndex) {
+        if (s <= nESecIndex) {
+          rcSec = pSection->Rearrange();
+          rcSec.top += fPosY;
+          rcSec.bottom += fPosY;
+        } else {
+          fOldHeight = pSection->m_SecInfo.rcSection.bottom -
+                       pSection->m_SecInfo.rcSection.top;
+          rcSec.top = fPosY;
+          rcSec.bottom = fPosY + fOldHeight;
+        }
+        pSection->m_SecInfo.rcSection = rcSec;
+        pSection->ResetLinePlace();
+      }
+      if (s == 0) {
+        rcRet = rcSec;
+      } else {
+        rcRet.left = std::min(rcSec.left, rcRet.left);
+        rcRet.top = std::min(rcSec.top, rcRet.top);
+        rcRet.right = std::max(rcSec.right, rcRet.right);
+        rcRet.bottom = std::max(rcSec.bottom, rcRet.bottom);
+      }
+      fPosY += rcSec.Height();
+    }
+  }
+  return rcRet;
+}
+int32_t CPDF_VariableText::GetCharWidth(int32_t nFontIndex,
+                                        FX_WORD Word,
+                                        FX_WORD SubWord,
+                                        int32_t nWordStyle) {
+  if (!m_pVTProvider) {
+    return 0;
+  }
+  if (SubWord > 0) {
+    return m_pVTProvider->GetCharWidth(nFontIndex, SubWord, nWordStyle);
+  }
+  return m_pVTProvider->GetCharWidth(nFontIndex, Word, nWordStyle);
+}
+int32_t CPDF_VariableText::GetTypeAscent(int32_t nFontIndex) {
+  return m_pVTProvider ? m_pVTProvider->GetTypeAscent(nFontIndex) : 0;
+}
+int32_t CPDF_VariableText::GetTypeDescent(int32_t nFontIndex) {
+  return m_pVTProvider ? m_pVTProvider->GetTypeDescent(nFontIndex) : 0;
+}
+int32_t CPDF_VariableText::GetWordFontIndex(FX_WORD word,
+                                            int32_t charset,
+                                            int32_t nFontIndex) {
+  return m_pVTProvider
+             ? m_pVTProvider->GetWordFontIndex(word, charset, nFontIndex)
+             : -1;
+}
+int32_t CPDF_VariableText::GetDefaultFontIndex() {
+  return m_pVTProvider ? m_pVTProvider->GetDefaultFontIndex() : -1;
+}
+FX_BOOL CPDF_VariableText::IsLatinWord(FX_WORD word) {
+  return m_pVTProvider ? m_pVTProvider->IsLatinWord(word) : FALSE;
+}
+IPDF_VariableText_Iterator* CPDF_VariableText::GetIterator() {
+  if (!m_pVTIterator) {
+    m_pVTIterator = new CPDF_VariableText_Iterator(this);
+  }
+  return m_pVTIterator;
+}
+IPDF_VariableText_Provider* CPDF_VariableText::SetProvider(
+    IPDF_VariableText_Provider* pProvider) {
+  IPDF_VariableText_Provider* pOld = m_pVTProvider;
+  m_pVTProvider = pProvider;
+  return pOld;
+}
+CPDF_VariableText_Iterator::CPDF_VariableText_Iterator(CPDF_VariableText* pVT)
+    : m_CurPos(-1, -1, -1), m_pVT(pVT) {}
+CPDF_VariableText_Iterator::~CPDF_VariableText_Iterator() {}
+void CPDF_VariableText_Iterator::SetAt(int32_t nWordIndex) {
+  m_CurPos = m_pVT->WordIndexToWordPlace(nWordIndex);
+}
+void CPDF_VariableText_Iterator::SetAt(const CPVT_WordPlace& place) {
+  ASSERT(m_pVT);
+  m_CurPos = place;
+}
+FX_BOOL CPDF_VariableText_Iterator::NextWord() {
+  if (m_CurPos == m_pVT->GetEndWordPlace()) {
+    return FALSE;
+  }
+  m_CurPos = m_pVT->GetNextWordPlace(m_CurPos);
+  return TRUE;
+}
+FX_BOOL CPDF_VariableText_Iterator::PrevWord() {
+  if (m_CurPos == m_pVT->GetBeginWordPlace()) {
+    return FALSE;
+  }
+  m_CurPos = m_pVT->GetPrevWordPlace(m_CurPos);
+  return TRUE;
+}
+FX_BOOL CPDF_VariableText_Iterator::NextLine() {
+  if (CSection* pSection = m_pVT->m_SectionArray.GetAt(m_CurPos.nSecIndex)) {
+    if (m_CurPos.nLineIndex < pSection->m_LineArray.GetSize() - 1) {
+      m_CurPos =
+          CPVT_WordPlace(m_CurPos.nSecIndex, m_CurPos.nLineIndex + 1, -1);
+      return TRUE;
+    }
+    if (m_CurPos.nSecIndex < m_pVT->m_SectionArray.GetSize() - 1) {
+      m_CurPos = CPVT_WordPlace(m_CurPos.nSecIndex + 1, 0, -1);
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_VariableText_Iterator::PrevLine() {
+  if (m_pVT->m_SectionArray.GetAt(m_CurPos.nSecIndex)) {
+    if (m_CurPos.nLineIndex > 0) {
+      m_CurPos =
+          CPVT_WordPlace(m_CurPos.nSecIndex, m_CurPos.nLineIndex - 1, -1);
+      return TRUE;
+    }
+    if (m_CurPos.nSecIndex > 0) {
+      if (CSection* pLastSection =
+              m_pVT->m_SectionArray.GetAt(m_CurPos.nSecIndex - 1)) {
+        m_CurPos = CPVT_WordPlace(m_CurPos.nSecIndex - 1,
+                                  pLastSection->m_LineArray.GetSize() - 1, -1);
+        return TRUE;
+      }
+    }
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_VariableText_Iterator::NextSection() {
+  if (m_CurPos.nSecIndex < m_pVT->m_SectionArray.GetSize() - 1) {
+    m_CurPos = CPVT_WordPlace(m_CurPos.nSecIndex + 1, 0, -1);
+    return TRUE;
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_VariableText_Iterator::PrevSection() {
+  ASSERT(m_pVT);
+  if (m_CurPos.nSecIndex > 0) {
+    m_CurPos = CPVT_WordPlace(m_CurPos.nSecIndex - 1, 0, -1);
+    return TRUE;
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_VariableText_Iterator::GetWord(CPVT_Word& word) const {
+  word.WordPlace = m_CurPos;
+  if (CSection* pSection = m_pVT->m_SectionArray.GetAt(m_CurPos.nSecIndex)) {
+    if (pSection->m_LineArray.GetAt(m_CurPos.nLineIndex)) {
+      if (CPVT_WordInfo* pWord =
+              pSection->m_WordArray.GetAt(m_CurPos.nWordIndex)) {
+        word.Word = pWord->Word;
+        word.nCharset = pWord->nCharset;
+        word.fWidth = m_pVT->GetWordWidth(*pWord);
+        word.ptWord = m_pVT->InToOut(
+            CFX_FloatPoint(pWord->fWordX + pSection->m_SecInfo.rcSection.left,
+                           pWord->fWordY + pSection->m_SecInfo.rcSection.top));
+        word.fAscent = m_pVT->GetWordAscent(*pWord);
+        word.fDescent = m_pVT->GetWordDescent(*pWord);
+        if (pWord->pWordProps) {
+          word.WordProps = *pWord->pWordProps;
+        }
+        word.nFontIndex = m_pVT->GetWordFontIndex(*pWord);
+        word.fFontSize = m_pVT->GetWordFontSize(*pWord);
+        return TRUE;
+      }
+    }
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_VariableText_Iterator::SetWord(const CPVT_Word& word) {
+  if (CSection* pSection = m_pVT->m_SectionArray.GetAt(m_CurPos.nSecIndex)) {
+    if (CPVT_WordInfo* pWord =
+            pSection->m_WordArray.GetAt(m_CurPos.nWordIndex)) {
+      if (pWord->pWordProps) {
+        *pWord->pWordProps = word.WordProps;
+      }
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_VariableText_Iterator::GetLine(CPVT_Line& line) const {
+  ASSERT(m_pVT);
+  line.lineplace = CPVT_WordPlace(m_CurPos.nSecIndex, m_CurPos.nLineIndex, -1);
+  if (CSection* pSection = m_pVT->m_SectionArray.GetAt(m_CurPos.nSecIndex)) {
+    if (CLine* pLine = pSection->m_LineArray.GetAt(m_CurPos.nLineIndex)) {
+      line.ptLine = m_pVT->InToOut(CFX_FloatPoint(
+          pLine->m_LineInfo.fLineX + pSection->m_SecInfo.rcSection.left,
+          pLine->m_LineInfo.fLineY + pSection->m_SecInfo.rcSection.top));
+      line.fLineWidth = pLine->m_LineInfo.fLineWidth;
+      line.fLineAscent = pLine->m_LineInfo.fLineAscent;
+      line.fLineDescent = pLine->m_LineInfo.fLineDescent;
+      line.lineEnd = pLine->GetEndWordPlace();
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_VariableText_Iterator::GetSection(CPVT_Section& section) const {
+  section.secplace = CPVT_WordPlace(m_CurPos.nSecIndex, 0, -1);
+  if (CSection* pSection = m_pVT->m_SectionArray.GetAt(m_CurPos.nSecIndex)) {
+    section.rcSection = m_pVT->InToOut(pSection->m_SecInfo.rcSection);
+    if (pSection->m_SecInfo.pSecProps) {
+      section.SecProps = *pSection->m_SecInfo.pSecProps;
+    }
+    if (pSection->m_SecInfo.pWordProps) {
+      section.WordProps = *pSection->m_SecInfo.pWordProps;
+    }
+    return TRUE;
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_VariableText_Iterator::SetSection(const CPVT_Section& section) {
+  if (CSection* pSection = m_pVT->m_SectionArray.GetAt(m_CurPos.nSecIndex)) {
+    if (pSection->m_SecInfo.pSecProps) {
+      *pSection->m_SecInfo.pSecProps = section.SecProps;
+    }
+    if (pSection->m_SecInfo.pWordProps) {
+      *pSection->m_SecInfo.pWordProps = section.WordProps;
+    }
+    return TRUE;
+  }
+  return FALSE;
+}
diff --git a/core/fpdfdoc/doc_vtmodule.cpp b/core/fpdfdoc/doc_vtmodule.cpp
new file mode 100644
index 0000000000..85e19ffd08
--- /dev/null
+++ b/core/fpdfdoc/doc_vtmodule.cpp
@@ -0,0 +1,16 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fpdfdoc/pdf_vt.h"
+#include "core/include/fpdfdoc/fpdf_doc.h"
+#include "core/include/fpdfdoc/fpdf_vt.h"
+
+IPDF_VariableText* IPDF_VariableText::NewVariableText() {
+  return new CPDF_VariableText();
+}
+void IPDF_VariableText::DelVariableText(IPDF_VariableText* pVT) {
+  delete (CPDF_VariableText*)pVT;
+}
diff --git a/core/fpdfdoc/pdf_vt.h b/core/fpdfdoc/pdf_vt.h
new file mode 100644
index 0000000000..53c48af4ec
--- /dev/null
+++ b/core/fpdfdoc/pdf_vt.h
@@ -0,0 +1,554 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef CORE_FPDFDOC_PDF_VT_H_
+#define CORE_FPDFDOC_PDF_VT_H_
+
+#include "core/include/fpdfdoc/fpdf_vt.h"
+
+class CPDF_VariableText;
+class CPDF_VariableText_Iterator;
+
+#define IsFloatZero(f) ((f) < 0.0001 && (f) > -0.0001)
+#define IsFloatBigger(fa, fb) ((fa) > (fb) && !IsFloatZero((fa) - (fb)))
+#define IsFloatSmaller(fa, fb) ((fa) < (fb) && !IsFloatZero((fa) - (fb)))
+
+class CPVT_Size {
+ public:
+  CPVT_Size() : x(0.0f), y(0.0f) {}
+  CPVT_Size(FX_FLOAT other_x, FX_FLOAT other_y) {
+    x = other_x;
+    y = other_y;
+  }
+  FX_FLOAT x, y;
+};
+class CPVT_FloatRect : public CFX_FloatRect {
+ public:
+  CPVT_FloatRect() { left = top = right = bottom = 0.0f; }
+  CPVT_FloatRect(FX_FLOAT other_left,
+                 FX_FLOAT other_top,
+                 FX_FLOAT other_right,
+                 FX_FLOAT other_bottom) {
+    left = other_left;
+    top = other_top;
+    right = other_right;
+    bottom = other_bottom;
+  }
+  explicit CPVT_FloatRect(const CFX_FloatRect& rect) {
+    left = rect.left;
+    top = rect.top;
+    right = rect.right;
+    bottom = rect.bottom;
+  }
+  void Default() { left = top = right = bottom = 0.0f; }
+  FX_FLOAT Height() const {
+    if (top > bottom)
+      return top - bottom;
+    return bottom - top;
+  }
+};
+struct CPVT_SectionInfo {
+  CPVT_SectionInfo()
+      : rcSection(), nTotalLine(0), pSecProps(NULL), pWordProps(NULL) {}
+  virtual ~CPVT_SectionInfo() {
+    delete pSecProps;
+    delete pWordProps;
+  }
+  CPVT_SectionInfo(const CPVT_SectionInfo& other)
+      : rcSection(), nTotalLine(0), pSecProps(NULL), pWordProps(NULL) {
+    operator=(other);
+  }
+  void operator=(const CPVT_SectionInfo& other) {
+    if (this == &other) {
+      return;
+    }
+    rcSection = other.rcSection;
+    nTotalLine = other.nTotalLine;
+    if (other.pSecProps) {
+      if (pSecProps) {
+        *pSecProps = *other.pSecProps;
+      } else {
+        pSecProps = new CPVT_SecProps(*other.pSecProps);
+      }
+    }
+    if (other.pWordProps) {
+      if (pWordProps) {
+        *pWordProps = *other.pWordProps;
+      } else {
+        pWordProps = new CPVT_WordProps(*other.pWordProps);
+      }
+    }
+  }
+  CPVT_FloatRect rcSection;
+  int32_t nTotalLine;
+  CPVT_SecProps* pSecProps;
+  CPVT_WordProps* pWordProps;
+};
+struct CPVT_LineInfo {
+  CPVT_LineInfo()
+      : nTotalWord(0),
+        nBeginWordIndex(-1),
+        nEndWordIndex(-1),
+        fLineX(0.0f),
+        fLineY(0.0f),
+        fLineWidth(0.0f),
+        fLineAscent(0.0f),
+        fLineDescent(0.0f) {}
+  int32_t nTotalWord;
+  int32_t nBeginWordIndex;
+  int32_t nEndWordIndex;
+  FX_FLOAT fLineX;
+  FX_FLOAT fLineY;
+  FX_FLOAT fLineWidth;
+  FX_FLOAT fLineAscent;
+  FX_FLOAT fLineDescent;
+};
+struct CPVT_WordInfo {
+  CPVT_WordInfo()
+      : Word(0),
+        nCharset(0),
+        fWordX(0.0f),
+        fWordY(0.0f),
+        fWordTail(0.0f),
+        nFontIndex(-1),
+        pWordProps(NULL) {}
+  CPVT_WordInfo(FX_WORD word,
+                int32_t charset,
+                int32_t fontIndex,
+                CPVT_WordProps* pProps)
+      : Word(word),
+        nCharset(charset),
+        fWordX(0.0f),
+        fWordY(0.0f),
+        fWordTail(0.0f),
+        nFontIndex(fontIndex),
+        pWordProps(pProps) {}
+  virtual ~CPVT_WordInfo() { delete pWordProps; }
+  CPVT_WordInfo(const CPVT_WordInfo& word)
+      : Word(0),
+        nCharset(0),
+        fWordX(0.0f),
+        fWordY(0.0f),
+        fWordTail(0.0f),
+        nFontIndex(-1),
+        pWordProps(NULL) {
+    operator=(word);
+  }
+  void operator=(const CPVT_WordInfo& word) {
+    if (this == &word) {
+      return;
+    }
+    Word = word.Word;
+    nCharset = word.nCharset;
+    nFontIndex = word.nFontIndex;
+    if (word.pWordProps) {
+      if (pWordProps) {
+        *pWordProps = *word.pWordProps;
+      } else {
+        pWordProps = new CPVT_WordProps(*word.pWordProps);
+      }
+    }
+  }
+  FX_WORD Word;
+  int32_t nCharset;
+  FX_FLOAT fWordX;
+  FX_FLOAT fWordY;
+  FX_FLOAT fWordTail;
+  int32_t nFontIndex;
+  CPVT_WordProps* pWordProps;
+};
+struct CPVT_FloatRange {
+  CPVT_FloatRange() : fMin(0.0f), fMax(0.0f) {}
+  CPVT_FloatRange(FX_FLOAT min, FX_FLOAT max) : fMin(min), fMax(max) {}
+  FX_FLOAT Range() const { return fMax - fMin; }
+  FX_FLOAT fMin, fMax;
+};
+template <class TYPE>
+class CPVT_ArrayTemplate : public CFX_ArrayTemplate<TYPE> {
+ public:
+  FX_BOOL IsEmpty() { return CFX_ArrayTemplate<TYPE>::GetSize() <= 0; }
+  TYPE GetAt(int nIndex) const {
+    if (nIndex >= 0 && nIndex < CFX_ArrayTemplate<TYPE>::GetSize()) {
+      return CFX_ArrayTemplate<TYPE>::GetAt(nIndex);
+    }
+    return NULL;
+  }
+  void RemoveAt(int nIndex) {
+    if (nIndex >= 0 && nIndex < CFX_ArrayTemplate<TYPE>::GetSize()) {
+      CFX_ArrayTemplate<TYPE>::RemoveAt(nIndex);
+    }
+  }
+};
+class CLine {
+ public:
+  CLine();
+  virtual ~CLine();
+  CPVT_WordPlace GetBeginWordPlace() const;
+  CPVT_WordPlace GetEndWordPlace() const;
+  CPVT_WordPlace GetPrevWordPlace(const CPVT_WordPlace& place) const;
+  CPVT_WordPlace GetNextWordPlace(const CPVT_WordPlace& place) const;
+  CPVT_WordPlace LinePlace;
+  CPVT_LineInfo m_LineInfo;
+};
+class CLines {
+ public:
+  CLines() : m_nTotal(0) {}
+  virtual ~CLines() { RemoveAll(); }
+  int32_t GetSize() const { return m_Lines.GetSize(); }
+  CLine* GetAt(int32_t nIndex) const { return m_Lines.GetAt(nIndex); }
+  void Empty() { m_nTotal = 0; }
+  void RemoveAll() {
+    for (int32_t i = 0, sz = GetSize(); i < sz; i++) {
+      delete GetAt(i);
+    }
+    m_Lines.RemoveAll();
+    m_nTotal = 0;
+  }
+  int32_t Add(const CPVT_LineInfo& lineinfo) {
+    if (m_nTotal >= GetSize()) {
+      CLine* pLine = new CLine;
+      pLine->m_LineInfo = lineinfo;
+      m_Lines.Add(pLine);
+    } else if (CLine* pLine = GetAt(m_nTotal)) {
+      pLine->m_LineInfo = lineinfo;
+    }
+    return m_nTotal++;
+  }
+  void Clear() {
+    for (int32_t i = GetSize() - 1; i >= m_nTotal; i--) {
+      delete GetAt(i);
+      m_Lines.RemoveAt(i);
+    }
+  }
+
+ private:
+  CPVT_ArrayTemplate<CLine*> m_Lines;
+  int32_t m_nTotal;
+};
+class CSection {
+  friend class CTypeset;
+
+ public:
+  explicit CSection(CPDF_VariableText* pVT);
+  virtual ~CSection();
+  void ResetAll();
+  void ResetLineArray();
+  void ResetWordArray();
+  void ResetLinePlace();
+  CPVT_WordPlace AddWord(const CPVT_WordPlace& place,
+                         const CPVT_WordInfo& wordinfo);
+  CPVT_WordPlace AddLine(const CPVT_LineInfo& lineinfo);
+  void ClearWords(const CPVT_WordRange& PlaceRange);
+  void ClearWord(const CPVT_WordPlace& place);
+  CPVT_FloatRect Rearrange();
+  CPVT_Size GetSectionSize(FX_FLOAT fFontSize);
+  CPVT_WordPlace GetBeginWordPlace() const;
+  CPVT_WordPlace GetEndWordPlace() const;
+  CPVT_WordPlace GetPrevWordPlace(const CPVT_WordPlace& place) const;
+  CPVT_WordPlace GetNextWordPlace(const CPVT_WordPlace& place) const;
+  void UpdateWordPlace(CPVT_WordPlace& place) const;
+  CPVT_WordPlace SearchWordPlace(const CFX_FloatPoint& point) const;
+  CPVT_WordPlace SearchWordPlace(FX_FLOAT fx,
+                                 const CPVT_WordPlace& lineplace) const;
+  CPVT_WordPlace SearchWordPlace(FX_FLOAT fx,
+                                 const CPVT_WordRange& range) const;
+
+ public:
+  CPVT_WordPlace SecPlace;
+  CPVT_SectionInfo m_SecInfo;
+  CLines m_LineArray;
+  CPVT_ArrayTemplate<CPVT_WordInfo*> m_WordArray;
+
+ private:
+  void ClearLeftWords(int32_t nWordIndex);
+  void ClearRightWords(int32_t nWordIndex);
+  void ClearMidWords(int32_t nBeginIndex, int32_t nEndIndex);
+
+  CPDF_VariableText* m_pVT;
+};
+class CTypeset {
+ public:
+  explicit CTypeset(CSection* pSection);
+  virtual ~CTypeset();
+  CPVT_Size GetEditSize(FX_FLOAT fFontSize);
+  CPVT_FloatRect Typeset();
+  CPVT_FloatRect CharArray();
+
+ private:
+  void SplitLines(FX_BOOL bTypeset, FX_FLOAT fFontSize);
+  void OutputLines();
+
+  CPVT_FloatRect m_rcRet;
+  CPDF_VariableText* m_pVT;
+  CSection* m_pSection;
+};
+class CPDF_EditContainer {
+ public:
+  CPDF_EditContainer() : m_rcPlate(0, 0, 0, 0), m_rcContent(0, 0, 0, 0) {}
+  virtual ~CPDF_EditContainer() {}
+  virtual void SetPlateRect(const CFX_FloatRect& rect) { m_rcPlate = rect; }
+  virtual const CFX_FloatRect& GetPlateRect() const { return m_rcPlate; }
+  virtual void SetContentRect(const CPVT_FloatRect& rect) {
+    m_rcContent = rect;
+  }
+  virtual CFX_FloatRect GetContentRect() const { return m_rcContent; }
+  FX_FLOAT GetPlateWidth() const { return m_rcPlate.right - m_rcPlate.left; }
+  FX_FLOAT GetPlateHeight() const { return m_rcPlate.top - m_rcPlate.bottom; }
+  CPVT_Size GetPlateSize() const {
+    return CPVT_Size(GetPlateWidth(), GetPlateHeight());
+  }
+  CFX_FloatPoint GetBTPoint() const {
+    return CFX_FloatPoint(m_rcPlate.left, m_rcPlate.top);
+  }
+  CFX_FloatPoint GetETPoint() const {
+    return CFX_FloatPoint(m_rcPlate.right, m_rcPlate.bottom);
+  }
+  inline CFX_FloatPoint InToOut(const CFX_FloatPoint& point) const {
+    return CFX_FloatPoint(point.x + GetBTPoint().x, GetBTPoint().y - point.y);
+  }
+  inline CFX_FloatPoint OutToIn(const CFX_FloatPoint& point) const {
+    return CFX_FloatPoint(point.x - GetBTPoint().x, GetBTPoint().y - point.y);
+  }
+  inline CFX_FloatRect InToOut(const CPVT_FloatRect& rect) const {
+    CFX_FloatPoint ptLeftTop = InToOut(CFX_FloatPoint(rect.left, rect.top));
+    CFX_FloatPoint ptRightBottom =
+        InToOut(CFX_FloatPoint(rect.right, rect.bottom));
+    return CFX_FloatRect(ptLeftTop.x, ptRightBottom.y, ptRightBottom.x,
+                         ptLeftTop.y);
+  }
+  inline CPVT_FloatRect OutToIn(const CFX_FloatRect& rect) const {
+    CFX_FloatPoint ptLeftTop = OutToIn(CFX_FloatPoint(rect.left, rect.top));
+    CFX_FloatPoint ptRightBottom =
+        OutToIn(CFX_FloatPoint(rect.right, rect.bottom));
+    return CPVT_FloatRect(ptLeftTop.x, ptLeftTop.y, ptRightBottom.x,
+                          ptRightBottom.y);
+  }
+
+ private:
+  CFX_FloatRect m_rcPlate;
+  CPVT_FloatRect m_rcContent;
+};
+
+class CPDF_VariableText : public IPDF_VariableText, private CPDF_EditContainer {
+  friend class CTypeset;
+  friend class CSection;
+  friend class CPDF_VariableText_Iterator;
+
+ public:
+  CPDF_VariableText();
+  ~CPDF_VariableText() override;
+
+  // IPDF_VariableText
+  IPDF_VariableText_Provider* SetProvider(
+      IPDF_VariableText_Provider* pProvider) override;
+  IPDF_VariableText_Iterator* GetIterator() override;
+  void SetPlateRect(const CFX_FloatRect& rect) override {
+    CPDF_EditContainer::SetPlateRect(rect);
+  }
+  void SetAlignment(int32_t nFormat = 0) override { m_nAlignment = nFormat; }
+  void SetPasswordChar(FX_WORD wSubWord = '*') override {
+    m_wSubWord = wSubWord;
+  }
+  void SetLimitChar(int32_t nLimitChar = 0) override {
+    m_nLimitChar = nLimitChar;
+  }
+  void SetCharSpace(FX_FLOAT fCharSpace = 0.0f) override {
+    m_fCharSpace = fCharSpace;
+  }
+  void SetHorzScale(int32_t nHorzScale = 100) override {
+    m_nHorzScale = nHorzScale;
+  }
+  void SetMultiLine(FX_BOOL bMultiLine = TRUE) override {
+    m_bMultiLine = bMultiLine;
+  }
+  void SetAutoReturn(FX_BOOL bAuto = TRUE) override { m_bLimitWidth = bAuto; }
+  void SetFontSize(FX_FLOAT fFontSize) override { m_fFontSize = fFontSize; }
+  void SetCharArray(int32_t nCharArray = 0) override {
+    m_nCharArray = nCharArray;
+  }
+  void SetAutoFontSize(FX_BOOL bAuto = TRUE) override {
+    m_bAutoFontSize = bAuto;
+  }
+  void SetRichText(FX_BOOL bRichText) override { m_bRichText = bRichText; }
+  void SetLineLeading(FX_FLOAT fLineLeading) override {
+    m_fLineLeading = fLineLeading;
+  }
+  void Initialize() override;
+  FX_BOOL IsValid() const override { return m_bInitial; }
+  FX_BOOL IsRichText() const override { return m_bRichText; }
+  void RearrangeAll() override;
+  void RearrangePart(const CPVT_WordRange& PlaceRange) override;
+  void ResetAll() override;
+  void SetText(const FX_WCHAR* text,
+               int32_t charset = 1,
+               const CPVT_SecProps* pSecProps = NULL,
+               const CPVT_WordProps* pWordProps = NULL) override;
+  CPVT_WordPlace InsertWord(const CPVT_WordPlace& place,
+                            FX_WORD word,
+                            int32_t charset = 1,
+                            const CPVT_WordProps* pWordProps = NULL) override;
+  CPVT_WordPlace InsertSection(
+      const CPVT_WordPlace& place,
+      const CPVT_SecProps* pSecProps = NULL,
+      const CPVT_WordProps* pWordProps = NULL) override;
+  CPVT_WordPlace InsertText(const CPVT_WordPlace& place,
+                            const FX_WCHAR* text,
+                            int32_t charset = 1,
+                            const CPVT_SecProps* pSecProps = NULL,
+                            const CPVT_WordProps* pWordProps = NULL) override;
+  CPVT_WordPlace DeleteWords(const CPVT_WordRange& PlaceRange) override;
+  CPVT_WordPlace DeleteWord(const CPVT_WordPlace& place) override;
+  CPVT_WordPlace BackSpaceWord(const CPVT_WordPlace& place) override;
+  const CFX_FloatRect& GetPlateRect() const override {
+    return CPDF_EditContainer::GetPlateRect();
+  }
+  CFX_FloatRect GetContentRect() const override;
+  int32_t GetTotalWords() const override;
+  FX_FLOAT GetFontSize() const override { return m_fFontSize; }
+  int32_t GetAlignment() const override { return m_nAlignment; }
+  FX_WORD GetPasswordChar() const override { return GetSubWord(); }
+  int32_t GetCharArray() const override { return m_nCharArray; }
+  int32_t GetLimitChar() const override { return m_nLimitChar; }
+  FX_BOOL IsMultiLine() const override { return m_bMultiLine; }
+  int32_t GetHorzScale() const override { return m_nHorzScale; }
+  FX_FLOAT GetCharSpace() const override { return m_fCharSpace; }
+  CPVT_WordPlace GetBeginWordPlace() const override;
+  CPVT_WordPlace GetEndWordPlace() const override;
+  CPVT_WordPlace GetPrevWordPlace(const CPVT_WordPlace& place) const override;
+  CPVT_WordPlace GetNextWordPlace(const CPVT_WordPlace& place) const override;
+  CPVT_WordPlace SearchWordPlace(const CFX_FloatPoint& point) const override;
+  CPVT_WordPlace GetUpWordPlace(const CPVT_WordPlace& place,
+                                const CFX_FloatPoint& point) const override;
+  CPVT_WordPlace GetDownWordPlace(const CPVT_WordPlace& place,
+                                  const CFX_FloatPoint& point) const override;
+  CPVT_WordPlace GetLineBeginPlace(const CPVT_WordPlace& place) const override;
+  CPVT_WordPlace GetLineEndPlace(const CPVT_WordPlace& place) const override;
+  CPVT_WordPlace GetSectionBeginPlace(
+      const CPVT_WordPlace& place) const override;
+  CPVT_WordPlace GetSectionEndPlace(const CPVT_WordPlace& place) const override;
+  void UpdateWordPlace(CPVT_WordPlace& place) const override;
+  CPVT_WordPlace AdjustLineHeader(const CPVT_WordPlace& place,
+                                  FX_BOOL bPrevOrNext) const override;
+  int32_t WordPlaceToWordIndex(const CPVT_WordPlace& place) const override;
+  CPVT_WordPlace WordIndexToWordPlace(int32_t index) const override;
+
+  FX_WORD GetSubWord() const { return m_wSubWord; }
+
+ private:
+  int32_t GetCharWidth(int32_t nFontIndex,
+                       FX_WORD Word,
+                       FX_WORD SubWord,
+                       int32_t nWordStyle);
+  int32_t GetTypeAscent(int32_t nFontIndex);
+  int32_t GetTypeDescent(int32_t nFontIndex);
+  int32_t GetWordFontIndex(FX_WORD word, int32_t charset, int32_t nFontIndex);
+  int32_t GetDefaultFontIndex();
+  FX_BOOL IsLatinWord(FX_WORD word);
+
+  CPVT_WordPlace AddSection(const CPVT_WordPlace& place,
+                            const CPVT_SectionInfo& secinfo);
+  CPVT_WordPlace AddLine(const CPVT_WordPlace& place,
+                         const CPVT_LineInfo& lineinfo);
+  CPVT_WordPlace AddWord(const CPVT_WordPlace& place,
+                         const CPVT_WordInfo& wordinfo);
+  FX_BOOL GetWordInfo(const CPVT_WordPlace& place, CPVT_WordInfo& wordinfo);
+  FX_BOOL SetWordInfo(const CPVT_WordPlace& place,
+                      const CPVT_WordInfo& wordinfo);
+  FX_BOOL GetLineInfo(const CPVT_WordPlace& place, CPVT_LineInfo& lineinfo);
+  FX_BOOL GetSectionInfo(const CPVT_WordPlace& place,
+                         CPVT_SectionInfo& secinfo);
+  FX_FLOAT GetWordFontSize(const CPVT_WordInfo& WordInfo,
+                           FX_BOOL bFactFontSize = FALSE);
+  FX_FLOAT GetWordWidth(int32_t nFontIndex,
+                        FX_WORD Word,
+                        FX_WORD SubWord,
+                        FX_FLOAT fCharSpace,
+                        int32_t nHorzScale,
+                        FX_FLOAT fFontSize,
+                        FX_FLOAT fWordTail,
+                        int32_t nWordStyle);
+  FX_FLOAT GetWordWidth(const CPVT_WordInfo& WordInfo);
+  FX_FLOAT GetWordAscent(const CPVT_WordInfo& WordInfo, FX_FLOAT fFontSize);
+  FX_FLOAT GetWordDescent(const CPVT_WordInfo& WordInfo, FX_FLOAT fFontSize);
+  FX_FLOAT GetWordAscent(const CPVT_WordInfo& WordInfo,
+                         FX_BOOL bFactFontSize = FALSE);
+  FX_FLOAT GetWordDescent(const CPVT_WordInfo& WordInfo,
+                          FX_BOOL bFactFontSize = FALSE);
+  FX_FLOAT GetLineAscent(const CPVT_SectionInfo& SecInfo);
+  FX_FLOAT GetLineDescent(const CPVT_SectionInfo& SecInfo);
+  FX_FLOAT GetFontAscent(int32_t nFontIndex, FX_FLOAT fFontSize);
+  FX_FLOAT GetFontDescent(int32_t nFontIndex, FX_FLOAT fFontSize);
+  int32_t GetWordFontIndex(const CPVT_WordInfo& WordInfo);
+  FX_FLOAT GetCharSpace(const CPVT_WordInfo& WordInfo);
+  int32_t GetHorzScale(const CPVT_WordInfo& WordInfo);
+  FX_FLOAT GetLineLeading(const CPVT_SectionInfo& SecInfo);
+  FX_FLOAT GetLineIndent(const CPVT_SectionInfo& SecInfo);
+  int32_t GetAlignment(const CPVT_SectionInfo& SecInfo);
+
+  void ClearSectionRightWords(const CPVT_WordPlace& place);
+
+  FX_BOOL ClearEmptySection(const CPVT_WordPlace& place);
+  void ClearEmptySections(const CPVT_WordRange& PlaceRange);
+  void LinkLatterSection(const CPVT_WordPlace& place);
+  void ClearWords(const CPVT_WordRange& PlaceRange);
+  CPVT_WordPlace ClearLeftWord(const CPVT_WordPlace& place);
+  CPVT_WordPlace ClearRightWord(const CPVT_WordPlace& place);
+
+ private:
+  CPVT_FloatRect Rearrange(const CPVT_WordRange& PlaceRange);
+  FX_FLOAT GetAutoFontSize();
+  FX_BOOL IsBigger(FX_FLOAT fFontSize);
+  CPVT_FloatRect RearrangeSections(const CPVT_WordRange& PlaceRange);
+
+  void ResetSectionArray();
+
+  CPVT_ArrayTemplate<CSection*> m_SectionArray;
+  int32_t m_nLimitChar;
+  int32_t m_nCharArray;
+  FX_BOOL m_bMultiLine;
+  FX_BOOL m_bLimitWidth;
+  FX_BOOL m_bAutoFontSize;
+  int32_t m_nAlignment;
+  FX_FLOAT m_fLineLeading;
+  FX_FLOAT m_fCharSpace;
+  int32_t m_nHorzScale;
+  FX_WORD m_wSubWord;
+  FX_FLOAT m_fFontSize;
+
+ private:
+  FX_BOOL m_bInitial;
+  FX_BOOL m_bRichText;
+  IPDF_VariableText_Provider* m_pVTProvider;
+  CPDF_VariableText_Iterator* m_pVTIterator;
+};
+
+class CPDF_VariableText_Iterator : public IPDF_VariableText_Iterator {
+ public:
+  explicit CPDF_VariableText_Iterator(CPDF_VariableText* pVT);
+  ~CPDF_VariableText_Iterator() override;
+
+  // IPDF_VariableText_Iterator
+  FX_BOOL NextWord() override;
+  FX_BOOL PrevWord() override;
+  FX_BOOL NextLine() override;
+  FX_BOOL PrevLine() override;
+  FX_BOOL NextSection() override;
+  FX_BOOL PrevSection() override;
+  FX_BOOL SetWord(const CPVT_Word& word) override;
+  FX_BOOL GetWord(CPVT_Word& word) const override;
+  FX_BOOL GetLine(CPVT_Line& line) const override;
+  FX_BOOL GetSection(CPVT_Section& section) const override;
+  FX_BOOL SetSection(const CPVT_Section& section) override;
+  void SetAt(int32_t nWordIndex) override;
+  void SetAt(const CPVT_WordPlace& place) override;
+  const CPVT_WordPlace& GetAt() const override { return m_CurPos; }
+
+ private:
+  CPVT_WordPlace m_CurPos;
+  CPDF_VariableText* m_pVT;
+};
+
+#endif  // CORE_FPDFDOC_PDF_VT_H_
diff --git a/core/fpdfdoc/tagged_int.h b/core/fpdfdoc/tagged_int.h
new file mode 100644
index 0000000000..e930f613b1
--- /dev/null
+++ b/core/fpdfdoc/tagged_int.h
@@ -0,0 +1,106 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef CORE_FPDFDOC_TAGGED_INT_H_
+#define CORE_FPDFDOC_TAGGED_INT_H_
+
+#include <map>
+
+#include "core/include/fpdfdoc/fpdf_tagged.h"
+
+class CPDF_StructElementImpl;
+
+class CPDF_StructTreeImpl : public CPDF_StructTree {
+ public:
+  explicit CPDF_StructTreeImpl(const CPDF_Document* pDoc);
+  ~CPDF_StructTreeImpl() override;
+
+  // CPDF_StructTree
+  int CountTopElements() const override { return m_Kids.GetSize(); }
+  CPDF_StructElement* GetTopElement(int i) const override {
+    return (CPDF_StructElement*)m_Kids.GetAt(i);
+  }
+
+  void LoadDocTree();
+  void LoadPageTree(const CPDF_Dictionary* pPageDict);
+  CPDF_StructElementImpl* AddPageNode(
+      CPDF_Dictionary* pElement,
+      std::map<CPDF_Dictionary*, CPDF_StructElementImpl*>& map,
+      int nLevel = 0);
+  FX_BOOL AddTopLevelNode(CPDF_Dictionary* pDict,
+                          CPDF_StructElementImpl* pElement);
+
+ protected:
+  const CPDF_Dictionary* m_pTreeRoot;
+  const CPDF_Dictionary* m_pRoleMap;
+  const CPDF_Dictionary* m_pPage;
+  CFX_ArrayTemplate<CPDF_StructElementImpl*> m_Kids;
+  friend class CPDF_StructElementImpl;
+};
+
+class CPDF_StructElementImpl final : public CPDF_StructElement {
+ public:
+  CPDF_StructElementImpl(CPDF_StructTreeImpl* pTree,
+                         CPDF_StructElementImpl* pParent,
+                         CPDF_Dictionary* pDict);
+
+  // CPDF_StructTreeImpl
+  CPDF_StructTree* GetTree() const override { return m_pTree; }
+  const CFX_ByteString& GetType() const override { return m_Type; }
+  CPDF_StructElement* GetParent() const override { return m_pParent; }
+  CPDF_Dictionary* GetDict() const override { return m_pDict; }
+  int CountKids() const override { return m_Kids.GetSize(); }
+  const CPDF_StructKid& GetKid(int index) const override {
+    return m_Kids.GetData()[index];
+  }
+  CPDF_Object* GetAttr(const CFX_ByteStringC& owner,
+                       const CFX_ByteStringC& name,
+                       FX_BOOL bInheritable = FALSE,
+                       FX_FLOAT fLevel = 0.0F) override;
+  CFX_ByteString GetName(const CFX_ByteStringC& owner,
+                         const CFX_ByteStringC& name,
+                         const CFX_ByteStringC& default_value,
+                         FX_BOOL bInheritable = FALSE,
+                         int subindex = -1) override;
+  FX_ARGB GetColor(const CFX_ByteStringC& owner,
+                   const CFX_ByteStringC& name,
+                   FX_ARGB default_value,
+                   FX_BOOL bInheritable = FALSE,
+                   int subindex = -1) override;
+  FX_FLOAT GetNumber(const CFX_ByteStringC& owner,
+                     const CFX_ByteStringC& name,
+                     FX_FLOAT default_value,
+                     FX_BOOL bInheritable = FALSE,
+                     int subindex = -1) override;
+  int GetInteger(const CFX_ByteStringC& owner,
+                 const CFX_ByteStringC& name,
+                 int default_value,
+                 FX_BOOL bInheritable = FALSE,
+                 int subindex = -1) override;
+
+  void LoadKids(CPDF_Dictionary* pDict);
+  void LoadKid(FX_DWORD PageObjNum, CPDF_Object* pObj, CPDF_StructKid* pKid);
+  CPDF_Object* GetAttr(const CFX_ByteStringC& owner,
+                       const CFX_ByteStringC& name,
+                       FX_BOOL bInheritable,
+                       int subindex);
+  CPDF_StructElementImpl* Retain();
+  void Release();
+
+ protected:
+  ~CPDF_StructElementImpl() override;
+
+  CPDF_StructTreeImpl* m_pTree;
+  CFX_ByteString m_Type;
+  CPDF_StructElementImpl* m_pParent;
+  CPDF_Dictionary* m_pDict;
+  CFX_ArrayTemplate<CPDF_StructKid> m_Kids;
+  int m_RefCount;
+
+  friend class CPDF_StructTreeImpl;
+};
+
+#endif  // CORE_FPDFDOC_TAGGED_INT_H_