Remove fxedit place classes in pdfwindow/

This CL removes the fpdfsdk/fxedit folder and moves the code to
fpdfsdk/pdfwindow which is the primary consumer. The classes were
renamed from CFX_* to CPWL_*.

Change-Id: I6c6178adccf978193bbb9685204657ebd3f438bb
Reviewed-on: https://pdfium-review.googlesource.com/8552
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

11 files changed, 3409 insertions, 34 deletions

diff --git a/fpdfsdk/pdfwindow/cpwl_appstream.cpp b/fpdfsdk/pdfwindow/cpwl_appstream.cpp
index f7ba4c465c..9ac08fa078 100644
--- a/fpdfsdk/pdfwindow/cpwl_appstream.cpp
+++ b/fpdfsdk/pdfwindow/cpwl_appstream.cpp
@@ -22,8 +22,8 @@
 #include "fpdfsdk/cpdfsdk_pageview.h"
 #include "fpdfsdk/cpdfsdk_widget.h"
 #include "fpdfsdk/formfiller/cba_fontmap.h"
-#include "fpdfsdk/fxedit/fxet_edit.h"
 #include "fpdfsdk/pdfwindow/cpwl_edit.h"
+#include "fpdfsdk/pdfwindow/cpwl_edit_impl.h"
 #include "fpdfsdk/pdfwindow/cpwl_icon.h"
 #include "fpdfsdk/pdfwindow/cpwl_wnd.h"
 
@@ -523,11 +523,11 @@ CFX_ByteString GetWordRenderString(const CFX_ByteString& strWords) {
   return CFX_ByteString();
 }
 
-CFX_ByteString GetEditAppStream(CFX_Edit* pEdit,
+CFX_ByteString GetEditAppStream(CPWL_EditImpl* pEdit,
                                 const CFX_PointF& ptOffset,
                                 bool bContinuous,
                                 uint16_t SubWord) {
-  CFX_Edit_Iterator* pIterator = pEdit->GetIterator();
+  CPWL_EditImpl_Iterator* pIterator = pEdit->GetIterator();
   pIterator->SetAt(0);
 
   std::ostringstream sEditStream;
@@ -686,7 +686,7 @@ CFX_ByteString GetPushButtonAppStream(const CFX_FloatRect& rcBBox,
                                       ButtonStyle nLayOut) {
   const float fAutoFontScale = 1.0f / 3.0f;
 
-  auto pEdit = pdfium::MakeUnique<CFX_Edit>();
+  auto pEdit = pdfium::MakeUnique<CPWL_EditImpl>();
   pEdit->SetFontMap(pFontMap);
   pEdit->SetAlignmentH(1, true);
   pEdit->SetAlignmentV(1, true);
@@ -1515,7 +1515,7 @@ void CPWL_AppStream::SetAsComboBox(const CFX_WideString* sValue) {
   rcButton.left = rcButton.right - 13;
   rcButton.Normalize();
 
-  auto pEdit = pdfium::MakeUnique<CFX_Edit>();
+  auto pEdit = pdfium::MakeUnique<CPWL_EditImpl>();
   pEdit->EnableRefresh(false);
 
   CBA_FontMap font_map(
@@ -1578,7 +1578,7 @@ void CPWL_AppStream::SetAsListBox() {
   CFX_FloatRect rcClient = widget_->GetClientRect();
   std::ostringstream sBody;
 
-  auto pEdit = pdfium::MakeUnique<CFX_Edit>();
+  auto pEdit = pdfium::MakeUnique<CPWL_EditImpl>();
   pEdit->EnableRefresh(false);
 
   CBA_FontMap font_map(
@@ -1658,7 +1658,7 @@ void CPWL_AppStream::SetAsTextField(const CFX_WideString* sValue) {
   std::ostringstream sBody;
   std::ostringstream sLines;
 
-  auto pEdit = pdfium::MakeUnique<CFX_Edit>();
+  auto pEdit = pdfium::MakeUnique<CPWL_EditImpl>();
   pEdit->EnableRefresh(false);
 
   CBA_FontMap font_map(
diff --git a/fpdfsdk/pdfwindow/cpwl_combo_box.cpp b/fpdfsdk/pdfwindow/cpwl_combo_box.cpp
index 484027eba2..8de2f1e733 100644
--- a/fpdfsdk/pdfwindow/cpwl_combo_box.cpp
+++ b/fpdfsdk/pdfwindow/cpwl_combo_box.cpp
@@ -11,10 +11,10 @@
 
 #include "core/fxge/cfx_pathdata.h"
 #include "core/fxge/cfx_renderdevice.h"
-#include "fpdfsdk/fxedit/fxet_list.h"
 #include "fpdfsdk/pdfwindow/cpwl_edit.h"
 #include "fpdfsdk/pdfwindow/cpwl_edit_ctrl.h"
 #include "fpdfsdk/pdfwindow/cpwl_list_box.h"
+#include "fpdfsdk/pdfwindow/cpwl_list_impl.h"
 #include "fpdfsdk/pdfwindow/cpwl_wnd.h"
 #include "public/fpdf_fwlevent.h"
 
diff --git a/fpdfsdk/pdfwindow/cpwl_edit.cpp b/fpdfsdk/pdfwindow/cpwl_edit.cpp
index 89361b5835..8588de73c6 100644
--- a/fpdfsdk/pdfwindow/cpwl_edit.cpp
+++ b/fpdfsdk/pdfwindow/cpwl_edit.cpp
@@ -20,9 +20,9 @@
 #include "core/fxge/cfx_pathdata.h"
 #include "core/fxge/cfx_renderdevice.h"
 #include "core/fxge/fx_font.h"
-#include "fpdfsdk/fxedit/fxet_edit.h"
 #include "fpdfsdk/pdfwindow/cpwl_caret.h"
 #include "fpdfsdk/pdfwindow/cpwl_edit_ctrl.h"
+#include "fpdfsdk/pdfwindow/cpwl_edit_impl.h"
 #include "fpdfsdk/pdfwindow/cpwl_font_map.h"
 #include "fpdfsdk/pdfwindow/cpwl_scroll_bar.h"
 #include "fpdfsdk/pdfwindow/cpwl_wnd.h"
@@ -281,9 +281,10 @@ void CPWL_Edit::DrawThisAppearance(CFX_RenderDevice* pDevice,
   }
 
   CFX_SystemHandler* pSysHandler = GetSystemHandler();
-  CFX_Edit::DrawEdit(pDevice, pUser2Device, m_pEdit.get(),
-                     GetTextColor().ToFXColor(GetTransparency()), rcClip,
-                     CFX_PointF(), pRange, pSysHandler, m_pFormFiller.Get());
+  CPWL_EditImpl::DrawEdit(pDevice, pUser2Device, m_pEdit.get(),
+                          GetTextColor().ToFXColor(GetTransparency()), rcClip,
+                          CFX_PointF(), pRange, pSysHandler,
+                          m_pFormFiller.Get());
 }
 
 bool CPWL_Edit::OnLButtonDown(const CFX_PointF& point, uint32_t nFlag) {
@@ -373,7 +374,7 @@ CPVT_WordRange CPWL_Edit::GetSelectWordRange() const {
 }
 
 CFX_PointF CPWL_Edit::GetWordRightBottomPoint(const CPVT_WordPlace& wpWord) {
-  CFX_Edit_Iterator* pIterator = m_pEdit->GetIterator();
+  CPWL_EditImpl_Iterator* pIterator = m_pEdit->GetIterator();
   CPVT_WordPlace wpOld = pIterator->GetAt();
   pIterator->SetAt(wpWord);
 
@@ -660,7 +661,7 @@ CPVT_WordRange CPWL_Edit::GetSameWordsRange(const CPVT_WordPlace& place,
                                             bool bArabic) const {
   CPVT_WordRange range;
 
-  CFX_Edit_Iterator* pIterator = m_pEdit->GetIterator();
+  CPWL_EditImpl_Iterator* pIterator = m_pEdit->GetIterator();
   CPVT_Word wordinfo;
   CPVT_WordPlace wpStart(place), wpEnd(place);
   pIterator->SetAt(place);
diff --git a/fpdfsdk/pdfwindow/cpwl_edit_ctrl.cpp b/fpdfsdk/pdfwindow/cpwl_edit_ctrl.cpp
index 7b90579a5f..c7e1f14499 100644
--- a/fpdfsdk/pdfwindow/cpwl_edit_ctrl.cpp
+++ b/fpdfsdk/pdfwindow/cpwl_edit_ctrl.cpp
@@ -9,15 +9,15 @@
 #include "core/fpdfdoc/cpvt_section.h"
 #include "core/fpdfdoc/cpvt_word.h"
 #include "core/fxge/fx_font.h"
-#include "fpdfsdk/fxedit/fxet_edit.h"
 #include "fpdfsdk/pdfwindow/cpwl_caret.h"
+#include "fpdfsdk/pdfwindow/cpwl_edit_impl.h"
 #include "fpdfsdk/pdfwindow/cpwl_font_map.h"
 #include "fpdfsdk/pdfwindow/cpwl_scroll_bar.h"
 #include "fpdfsdk/pdfwindow/cpwl_wnd.h"
 #include "public/fpdf_fwlevent.h"
 
 CPWL_EditCtrl::CPWL_EditCtrl()
-    : m_pEdit(new CFX_Edit),
+    : m_pEdit(new CPWL_EditImpl),
       m_pEditCaret(nullptr),
       m_bMouseDown(false),
       m_nCharSet(FX_CHARSET_Default) {}
@@ -302,7 +302,7 @@ void CPWL_EditCtrl::SetEditCaret(bool bVisible) {
 }
 
 void CPWL_EditCtrl::GetCaretInfo(CFX_PointF* ptHead, CFX_PointF* ptFoot) const {
-  CFX_Edit_Iterator* pIterator = m_pEdit->GetIterator();
+  CPWL_EditImpl_Iterator* pIterator = m_pEdit->GetIterator();
   pIterator->SetAt(m_pEdit->GetCaret());
   CPVT_Word word;
   CPVT_Line line;
diff --git a/fpdfsdk/pdfwindow/cpwl_edit_ctrl.h b/fpdfsdk/pdfwindow/cpwl_edit_ctrl.h
index fca3bd8fe4..ef6989e637 100644
--- a/fpdfsdk/pdfwindow/cpwl_edit_ctrl.h
+++ b/fpdfsdk/pdfwindow/cpwl_edit_ctrl.h
@@ -12,7 +12,7 @@
 #include "core/fxcrt/fx_string.h"
 #include "fpdfsdk/pdfwindow/cpwl_wnd.h"
 
-class CFX_Edit;
+class CPWL_EditImpl;
 class CPWL_Caret;
 struct CPVT_WordPlace;
 
@@ -82,7 +82,7 @@ class CPWL_EditCtrl : public CPWL_Wnd {
 
   void SetEditCaret(bool bVisible);
 
-  std::unique_ptr<CFX_Edit> m_pEdit;
+  std::unique_ptr<CPWL_EditImpl> m_pEdit;
   CPWL_Caret* m_pEditCaret;
   bool m_bMouseDown;
 
diff --git a/fpdfsdk/pdfwindow/cpwl_edit_impl.cpp b/fpdfsdk/pdfwindow/cpwl_edit_impl.cpp
new file mode 100644
index 0000000000..0f5cf05b10
--- /dev/null
+++ b/fpdfsdk/pdfwindow/cpwl_edit_impl.cpp
@@ -0,0 +1,2053 @@
+// 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 "fpdfsdk/pdfwindow/cpwl_edit_impl.h"
+
+#include <algorithm>
+#include <memory>
+#include <sstream>
+#include <utility>
+
+#include "core/fpdfapi/font/cpdf_font.h"
+#include "core/fpdfapi/page/cpdf_pageobject.h"
+#include "core/fpdfapi/page/cpdf_pageobjectholder.h"
+#include "core/fpdfapi/page/cpdf_pathobject.h"
+#include "core/fpdfapi/page/cpdf_textobject.h"
+#include "core/fpdfapi/parser/fpdf_parser_decode.h"
+#include "core/fpdfapi/render/cpdf_renderoptions.h"
+#include "core/fpdfapi/render/cpdf_textrenderer.h"
+#include "core/fpdfdoc/cpvt_section.h"
+#include "core/fpdfdoc/cpvt_word.h"
+#include "core/fpdfdoc/ipvt_fontmap.h"
+#include "core/fxcrt/fx_codepage.h"
+#include "core/fxge/cfx_graphstatedata.h"
+#include "core/fxge/cfx_pathdata.h"
+#include "core/fxge/cfx_renderdevice.h"
+#include "fpdfsdk/cfx_systemhandler.h"
+#include "fpdfsdk/pdfwindow/cpwl_edit.h"
+#include "fpdfsdk/pdfwindow/cpwl_edit_ctrl.h"
+#include "fpdfsdk/pdfwindow/cpwl_scroll_bar.h"
+#include "third_party/base/ptr_util.h"
+#include "third_party/base/stl_util.h"
+
+namespace {
+
+const int kEditUndoMaxItems = 10000;
+
+void DrawTextString(CFX_RenderDevice* pDevice,
+                    const CFX_PointF& pt,
+                    CPDF_Font* pFont,
+                    float fFontSize,
+                    CFX_Matrix* pUser2Device,
+                    const CFX_ByteString& str,
+                    FX_ARGB crTextFill,
+                    int32_t nHorzScale) {
+  CFX_PointF pos = pUser2Device->Transform(pt);
+
+  if (pFont) {
+    if (nHorzScale != 100) {
+      CFX_Matrix mt(nHorzScale / 100.0f, 0, 0, 1, 0, 0);
+      mt.Concat(*pUser2Device);
+
+      CPDF_RenderOptions ro;
+      ro.m_Flags = RENDER_CLEARTYPE;
+      ro.m_ColorMode = CPDF_RenderOptions::kNormal;
+
+      CPDF_TextRenderer::DrawTextString(pDevice, pos.x, pos.y, pFont, fFontSize,
+                                        &mt, str, crTextFill, nullptr, &ro);
+    } else {
+      CPDF_RenderOptions ro;
+      ro.m_Flags = RENDER_CLEARTYPE;
+      ro.m_ColorMode = CPDF_RenderOptions::kNormal;
+
+      CPDF_TextRenderer::DrawTextString(pDevice, pos.x, pos.y, pFont, fFontSize,
+                                        pUser2Device, str, crTextFill, nullptr,
+                                        &ro);
+    }
+  }
+}
+
+}  // namespace
+
+CPWL_EditImpl_Iterator::CPWL_EditImpl_Iterator(
+    CPWL_EditImpl* pEdit,
+    CPDF_VariableText::Iterator* pVTIterator)
+    : m_pEdit(pEdit), m_pVTIterator(pVTIterator) {}
+
+CPWL_EditImpl_Iterator::~CPWL_EditImpl_Iterator() {}
+
+bool CPWL_EditImpl_Iterator::NextWord() {
+  return m_pVTIterator->NextWord();
+}
+
+bool CPWL_EditImpl_Iterator::PrevWord() {
+  return m_pVTIterator->PrevWord();
+}
+
+bool CPWL_EditImpl_Iterator::GetWord(CPVT_Word& word) const {
+  ASSERT(m_pEdit);
+
+  if (m_pVTIterator->GetWord(word)) {
+    word.ptWord = m_pEdit->VTToEdit(word.ptWord);
+    return true;
+  }
+  return false;
+}
+
+bool CPWL_EditImpl_Iterator::GetLine(CPVT_Line& line) const {
+  ASSERT(m_pEdit);
+
+  if (m_pVTIterator->GetLine(line)) {
+    line.ptLine = m_pEdit->VTToEdit(line.ptLine);
+    return true;
+  }
+  return false;
+}
+
+void CPWL_EditImpl_Iterator::SetAt(int32_t nWordIndex) {
+  m_pVTIterator->SetAt(nWordIndex);
+}
+
+void CPWL_EditImpl_Iterator::SetAt(const CPVT_WordPlace& place) {
+  m_pVTIterator->SetAt(place);
+}
+
+const CPVT_WordPlace& CPWL_EditImpl_Iterator::GetAt() const {
+  return m_pVTIterator->GetAt();
+}
+
+CPWL_EditImpl_Provider::CPWL_EditImpl_Provider(IPVT_FontMap* pFontMap)
+    : CPDF_VariableText::Provider(pFontMap), m_pFontMap(pFontMap) {
+  ASSERT(m_pFontMap);
+}
+
+CPWL_EditImpl_Provider::~CPWL_EditImpl_Provider() {}
+
+IPVT_FontMap* CPWL_EditImpl_Provider::GetFontMap() const {
+  return m_pFontMap;
+}
+
+int32_t CPWL_EditImpl_Provider::GetCharWidth(int32_t nFontIndex,
+                                             uint16_t word) {
+  if (CPDF_Font* pPDFFont = m_pFontMap->GetPDFFont(nFontIndex)) {
+    uint32_t charcode = word;
+
+    if (pPDFFont->IsUnicodeCompatible())
+      charcode = pPDFFont->CharCodeFromUnicode(word);
+    else
+      charcode = m_pFontMap->CharCodeFromUnicode(nFontIndex, word);
+
+    if (charcode != CPDF_Font::kInvalidCharCode)
+      return pPDFFont->GetCharWidthF(charcode);
+  }
+
+  return 0;
+}
+
+int32_t CPWL_EditImpl_Provider::GetTypeAscent(int32_t nFontIndex) {
+  if (CPDF_Font* pPDFFont = m_pFontMap->GetPDFFont(nFontIndex))
+    return pPDFFont->GetTypeAscent();
+
+  return 0;
+}
+
+int32_t CPWL_EditImpl_Provider::GetTypeDescent(int32_t nFontIndex) {
+  if (CPDF_Font* pPDFFont = m_pFontMap->GetPDFFont(nFontIndex))
+    return pPDFFont->GetTypeDescent();
+
+  return 0;
+}
+
+int32_t CPWL_EditImpl_Provider::GetWordFontIndex(uint16_t word,
+                                                 int32_t charset,
+                                                 int32_t nFontIndex) {
+  return m_pFontMap->GetWordFontIndex(word, charset, nFontIndex);
+}
+
+int32_t CPWL_EditImpl_Provider::GetDefaultFontIndex() {
+  return 0;
+}
+
+bool CPWL_EditImpl_Provider::IsLatinWord(uint16_t word) {
+  return FX_EDIT_ISLATINWORD(word);
+}
+
+CPWL_EditImpl_Refresh::CPWL_EditImpl_Refresh() {}
+
+CPWL_EditImpl_Refresh::~CPWL_EditImpl_Refresh() {}
+
+void CPWL_EditImpl_Refresh::BeginRefresh() {
+  m_RefreshRects.Clear();
+  m_OldLineRects = std::move(m_NewLineRects);
+}
+
+void CPWL_EditImpl_Refresh::Push(const CPVT_WordRange& linerange,
+                                 const CFX_FloatRect& rect) {
+  m_NewLineRects.Add(linerange, rect);
+}
+
+void CPWL_EditImpl_Refresh::NoAnalyse() {
+  {
+    for (int32_t i = 0, sz = m_OldLineRects.GetSize(); i < sz; i++)
+      if (CPWL_EditImpl_LineRect* pOldRect = m_OldLineRects.GetAt(i))
+        m_RefreshRects.Add(pOldRect->m_rcLine);
+  }
+
+  {
+    for (int32_t i = 0, sz = m_NewLineRects.GetSize(); i < sz; i++)
+      if (CPWL_EditImpl_LineRect* pNewRect = m_NewLineRects.GetAt(i))
+        m_RefreshRects.Add(pNewRect->m_rcLine);
+  }
+}
+
+const CPWL_EditImpl_RectArray* CPWL_EditImpl_Refresh::GetRefreshRects() const {
+  return &m_RefreshRects;
+}
+
+void CPWL_EditImpl_Refresh::EndRefresh() {
+  m_RefreshRects.Clear();
+}
+
+CPWL_EditImpl_Undo::CPWL_EditImpl_Undo(int32_t nBufsize)
+    : m_nCurUndoPos(0), m_nBufSize(nBufsize), m_bWorking(false) {}
+
+CPWL_EditImpl_Undo::~CPWL_EditImpl_Undo() {
+  Reset();
+}
+
+bool CPWL_EditImpl_Undo::CanUndo() const {
+  return m_nCurUndoPos > 0;
+}
+
+void CPWL_EditImpl_Undo::Undo() {
+  m_bWorking = true;
+  if (m_nCurUndoPos > 0) {
+    m_UndoItemStack[m_nCurUndoPos - 1]->Undo();
+    m_nCurUndoPos--;
+  }
+  m_bWorking = false;
+}
+
+bool CPWL_EditImpl_Undo::CanRedo() const {
+  return m_nCurUndoPos < m_UndoItemStack.size();
+}
+
+void CPWL_EditImpl_Undo::Redo() {
+  m_bWorking = true;
+  if (m_nCurUndoPos < m_UndoItemStack.size()) {
+    m_UndoItemStack[m_nCurUndoPos]->Redo();
+    m_nCurUndoPos++;
+  }
+  m_bWorking = false;
+}
+
+void CPWL_EditImpl_Undo::AddItem(std::unique_ptr<IFX_Edit_UndoItem> pItem) {
+  ASSERT(!m_bWorking);
+  ASSERT(pItem);
+  ASSERT(m_nBufSize > 1);
+  if (m_nCurUndoPos < m_UndoItemStack.size())
+    RemoveTails();
+
+  if (m_UndoItemStack.size() >= m_nBufSize)
+    RemoveHeads();
+
+  m_UndoItemStack.push_back(std::move(pItem));
+  m_nCurUndoPos = m_UndoItemStack.size();
+}
+
+void CPWL_EditImpl_Undo::RemoveHeads() {
+  ASSERT(m_UndoItemStack.size() > 1);
+  m_UndoItemStack.pop_front();
+}
+
+void CPWL_EditImpl_Undo::RemoveTails() {
+  while (m_UndoItemStack.size() > m_nCurUndoPos)
+    m_UndoItemStack.pop_back();
+}
+
+void CPWL_EditImpl_Undo::Reset() {
+  m_UndoItemStack.clear();
+  m_nCurUndoPos = 0;
+}
+
+CPWL_EditImpl_UndoItem::CPWL_EditImpl_UndoItem()
+    : m_bFirst(true), m_bLast(true) {}
+
+CPWL_EditImpl_UndoItem::~CPWL_EditImpl_UndoItem() {}
+
+CFX_WideString CPWL_EditImpl_UndoItem::GetUndoTitle() const {
+  return CFX_WideString();
+}
+
+void CPWL_EditImpl_UndoItem::SetFirst(bool bFirst) {
+  m_bFirst = bFirst;
+}
+
+void CPWL_EditImpl_UndoItem::SetLast(bool bLast) {
+  m_bLast = bLast;
+}
+
+bool CPWL_EditImpl_UndoItem::IsLast() {
+  return m_bLast;
+}
+
+CFXEU_InsertWord::CFXEU_InsertWord(CPWL_EditImpl* pEdit,
+                                   const CPVT_WordPlace& wpOldPlace,
+                                   const CPVT_WordPlace& wpNewPlace,
+                                   uint16_t word,
+                                   int32_t charset,
+                                   const CPVT_WordProps* pWordProps)
+    : m_pEdit(pEdit),
+      m_wpOld(wpOldPlace),
+      m_wpNew(wpNewPlace),
+      m_Word(word),
+      m_nCharset(charset),
+      m_WordProps() {
+  if (pWordProps)
+    m_WordProps = *pWordProps;
+}
+
+CFXEU_InsertWord::~CFXEU_InsertWord() {}
+
+void CFXEU_InsertWord::Redo() {
+  if (m_pEdit) {
+    m_pEdit->SelectNone();
+    m_pEdit->SetCaret(m_wpOld);
+    m_pEdit->InsertWord(m_Word, m_nCharset, &m_WordProps, false, true);
+  }
+}
+
+void CFXEU_InsertWord::Undo() {
+  if (m_pEdit) {
+    m_pEdit->SelectNone();
+    m_pEdit->SetCaret(m_wpNew);
+    m_pEdit->Backspace(false, true);
+  }
+}
+
+CFXEU_InsertReturn::CFXEU_InsertReturn(CPWL_EditImpl* pEdit,
+                                       const CPVT_WordPlace& wpOldPlace,
+                                       const CPVT_WordPlace& wpNewPlace,
+                                       const CPVT_SecProps* pSecProps,
+                                       const CPVT_WordProps* pWordProps)
+    : m_pEdit(pEdit),
+      m_wpOld(wpOldPlace),
+      m_wpNew(wpNewPlace),
+      m_SecProps(),
+      m_WordProps() {
+  if (pSecProps)
+    m_SecProps = *pSecProps;
+  if (pWordProps)
+    m_WordProps = *pWordProps;
+}
+
+CFXEU_InsertReturn::~CFXEU_InsertReturn() {}
+
+void CFXEU_InsertReturn::Redo() {
+  if (m_pEdit) {
+    m_pEdit->SelectNone();
+    m_pEdit->SetCaret(m_wpOld);
+    m_pEdit->InsertReturn(&m_SecProps, &m_WordProps, false, true);
+  }
+}
+
+void CFXEU_InsertReturn::Undo() {
+  if (m_pEdit) {
+    m_pEdit->SelectNone();
+    m_pEdit->SetCaret(m_wpNew);
+    m_pEdit->Backspace(false, true);
+  }
+}
+
+CFXEU_Backspace::CFXEU_Backspace(CPWL_EditImpl* pEdit,
+                                 const CPVT_WordPlace& wpOldPlace,
+                                 const CPVT_WordPlace& wpNewPlace,
+                                 uint16_t word,
+                                 int32_t charset,
+                                 const CPVT_SecProps& SecProps,
+                                 const CPVT_WordProps& WordProps)
+    : m_pEdit(pEdit),
+      m_wpOld(wpOldPlace),
+      m_wpNew(wpNewPlace),
+      m_Word(word),
+      m_nCharset(charset),
+      m_SecProps(SecProps),
+      m_WordProps(WordProps) {}
+
+CFXEU_Backspace::~CFXEU_Backspace() {}
+
+void CFXEU_Backspace::Redo() {
+  if (!m_pEdit)
+    return;
+
+  m_pEdit->SelectNone();
+  m_pEdit->SetCaret(m_wpOld);
+  m_pEdit->Backspace(false, true);
+}
+
+void CFXEU_Backspace::Undo() {
+  if (!m_pEdit)
+    return;
+
+  m_pEdit->SelectNone();
+  m_pEdit->SetCaret(m_wpNew);
+  if (m_wpNew.nSecIndex != m_wpOld.nSecIndex)
+    m_pEdit->InsertReturn(&m_SecProps, &m_WordProps, false, true);
+  else
+    m_pEdit->InsertWord(m_Word, m_nCharset, &m_WordProps, false, true);
+}
+
+CFXEU_Delete::CFXEU_Delete(CPWL_EditImpl* pEdit,
+                           const CPVT_WordPlace& wpOldPlace,
+                           const CPVT_WordPlace& wpNewPlace,
+                           uint16_t word,
+                           int32_t charset,
+                           const CPVT_SecProps& SecProps,
+                           const CPVT_WordProps& WordProps,
+                           bool bSecEnd)
+    : m_pEdit(pEdit),
+      m_wpOld(wpOldPlace),
+      m_wpNew(wpNewPlace),
+      m_Word(word),
+      m_nCharset(charset),
+      m_SecProps(SecProps),
+      m_WordProps(WordProps),
+      m_bSecEnd(bSecEnd) {}
+
+CFXEU_Delete::~CFXEU_Delete() {}
+
+void CFXEU_Delete::Redo() {
+  if (m_pEdit) {
+    m_pEdit->SelectNone();
+    m_pEdit->SetCaret(m_wpOld);
+    m_pEdit->Delete(false, true);
+  }
+}
+
+void CFXEU_Delete::Undo() {
+  if (m_pEdit) {
+    m_pEdit->SelectNone();
+    m_pEdit->SetCaret(m_wpNew);
+    if (m_bSecEnd) {
+      m_pEdit->InsertReturn(&m_SecProps, &m_WordProps, false, true);
+    } else {
+      m_pEdit->InsertWord(m_Word, m_nCharset, &m_WordProps, false, true);
+    }
+  }
+}
+
+CFXEU_Clear::CFXEU_Clear(CPWL_EditImpl* pEdit,
+                         const CPVT_WordRange& wrSel,
+                         const CFX_WideString& swText)
+    : m_pEdit(pEdit), m_wrSel(wrSel), m_swText(swText) {}
+
+CFXEU_Clear::~CFXEU_Clear() {}
+
+void CFXEU_Clear::Redo() {
+  if (m_pEdit) {
+    m_pEdit->SelectNone();
+    m_pEdit->SetSelection(m_wrSel.BeginPos, m_wrSel.EndPos);
+    m_pEdit->Clear(false, true);
+  }
+}
+
+void CFXEU_Clear::Undo() {
+  if (m_pEdit) {
+    m_pEdit->SelectNone();
+    m_pEdit->SetCaret(m_wrSel.BeginPos);
+    m_pEdit->InsertText(m_swText, FX_CHARSET_Default, false, true);
+    m_pEdit->SetSelection(m_wrSel.BeginPos, m_wrSel.EndPos);
+  }
+}
+
+CFXEU_InsertText::CFXEU_InsertText(CPWL_EditImpl* pEdit,
+                                   const CPVT_WordPlace& wpOldPlace,
+                                   const CPVT_WordPlace& wpNewPlace,
+                                   const CFX_WideString& swText,
+                                   int32_t charset)
+    : m_pEdit(pEdit),
+      m_wpOld(wpOldPlace),
+      m_wpNew(wpNewPlace),
+      m_swText(swText),
+      m_nCharset(charset) {}
+
+CFXEU_InsertText::~CFXEU_InsertText() {}
+
+void CFXEU_InsertText::Redo() {
+  if (m_pEdit && IsLast()) {
+    m_pEdit->SelectNone();
+    m_pEdit->SetCaret(m_wpOld);
+    m_pEdit->InsertText(m_swText, m_nCharset, false, true);
+  }
+}
+
+void CFXEU_InsertText::Undo() {
+  if (m_pEdit) {
+    m_pEdit->SelectNone();
+    m_pEdit->SetSelection(m_wpOld, m_wpNew);
+    m_pEdit->Clear(false, true);
+  }
+}
+
+// static
+void CPWL_EditImpl::DrawEdit(CFX_RenderDevice* pDevice,
+                             CFX_Matrix* pUser2Device,
+                             CPWL_EditImpl* pEdit,
+                             FX_COLORREF crTextFill,
+                             const CFX_FloatRect& rcClip,
+                             const CFX_PointF& ptOffset,
+                             const CPVT_WordRange* pRange,
+                             CFX_SystemHandler* pSystemHandler,
+                             CFFL_FormFiller* pFFLData) {
+  const bool bContinuous =
+      pEdit->GetCharArray() == 0 && pEdit->GetCharSpace() <= 0.0f;
+  uint16_t SubWord = pEdit->GetPasswordChar();
+  float fFontSize = pEdit->GetFontSize();
+  CPVT_WordRange wrSelect = pEdit->GetSelectWordRange();
+  int32_t nHorzScale = pEdit->GetHorzScale();
+
+  FX_COLORREF crCurFill = crTextFill;
+  FX_COLORREF crOldFill = crCurFill;
+
+  bool bSelect = false;
+  const FX_COLORREF crWhite = ArgbEncode(255, 255, 255, 255);
+  const FX_COLORREF crSelBK = ArgbEncode(255, 0, 51, 113);
+
+  std::ostringstream sTextBuf;
+  int32_t nFontIndex = -1;
+  CFX_PointF ptBT;
+  CFX_RenderDevice::StateRestorer restorer(pDevice);
+  if (!rcClip.IsEmpty()) {
+    CFX_FloatRect rcTemp = rcClip;
+    pUser2Device->TransformRect(rcTemp);
+    pDevice->SetClip_Rect(rcTemp.ToFxRect());
+  }
+
+  CPWL_EditImpl_Iterator* pIterator = pEdit->GetIterator();
+  if (IPVT_FontMap* pFontMap = pEdit->GetFontMap()) {
+    if (pRange)
+      pIterator->SetAt(pRange->BeginPos);
+    else
+      pIterator->SetAt(0);
+
+    CPVT_WordPlace oldplace;
+    while (pIterator->NextWord()) {
+      CPVT_WordPlace place = pIterator->GetAt();
+      if (pRange && place > pRange->EndPos)
+        break;
+
+      if (!wrSelect.IsEmpty()) {
+        bSelect = place > wrSelect.BeginPos && place <= wrSelect.EndPos;
+        crCurFill = bSelect ? crWhite : crTextFill;
+      }
+      if (pSystemHandler && pSystemHandler->IsSelectionImplemented()) {
+        crCurFill = crTextFill;
+        crOldFill = crCurFill;
+      }
+      CPVT_Word word;
+      if (pIterator->GetWord(word)) {
+        if (bSelect) {
+          CPVT_Line line;
+          pIterator->GetLine(line);
+
+          if (pSystemHandler && pSystemHandler->IsSelectionImplemented()) {
+            CFX_FloatRect rc(word.ptWord.x, line.ptLine.y + line.fLineDescent,
+                             word.ptWord.x + word.fWidth,
+                             line.ptLine.y + line.fLineAscent);
+            rc.Intersect(rcClip);
+            pSystemHandler->OutputSelectedRect(pFFLData, rc);
+          } else {
+            CFX_PathData pathSelBK;
+            pathSelBK.AppendRect(
+                word.ptWord.x, line.ptLine.y + line.fLineDescent,
+                word.ptWord.x + word.fWidth, line.ptLine.y + line.fLineAscent);
+
+            pDevice->DrawPath(&pathSelBK, pUser2Device, nullptr, crSelBK, 0,
+                              FXFILL_WINDING);
+          }
+        }
+
+        if (bContinuous) {
+          if (place.LineCmp(oldplace) != 0 || word.nFontIndex != nFontIndex ||
+              crOldFill != crCurFill) {
+            if (sTextBuf.tellp() > 0) {
+              DrawTextString(
+                  pDevice, CFX_PointF(ptBT.x + ptOffset.x, ptBT.y + ptOffset.y),
+                  pFontMap->GetPDFFont(nFontIndex), fFontSize, pUser2Device,
+                  CFX_ByteString(sTextBuf), crOldFill, nHorzScale);
+
+              sTextBuf.str("");
+            }
+            nFontIndex = word.nFontIndex;
+            ptBT = word.ptWord;
+            crOldFill = crCurFill;
+          }
+
+          sTextBuf << pEdit->GetPDFWordString(word.nFontIndex, word.Word,
+                                              SubWord);
+        } else {
+          DrawTextString(
+              pDevice,
+              CFX_PointF(word.ptWord.x + ptOffset.x,
+                         word.ptWord.y + ptOffset.y),
+              pFontMap->GetPDFFont(word.nFontIndex), fFontSize, pUser2Device,
+              pEdit->GetPDFWordString(word.nFontIndex, word.Word, SubWord),
+              crCurFill, nHorzScale);
+        }
+        oldplace = place;
+      }
+    }
+
+    if (sTextBuf.tellp() > 0) {
+      DrawTextString(pDevice,
+                     CFX_PointF(ptBT.x + ptOffset.x, ptBT.y + ptOffset.y),
+                     pFontMap->GetPDFFont(nFontIndex), fFontSize, pUser2Device,
+                     CFX_ByteString(sTextBuf), crOldFill, nHorzScale);
+    }
+  }
+}
+
+CPWL_EditImpl::CPWL_EditImpl()
+    : m_pVT(new CPDF_VariableText),
+      m_pNotify(nullptr),
+      m_pOprNotify(nullptr),
+      m_wpCaret(-1, -1, -1),
+      m_wpOldCaret(-1, -1, -1),
+      m_SelState(),
+      m_bEnableScroll(false),
+      m_Undo(kEditUndoMaxItems),
+      m_nAlignment(0),
+      m_bNotifyFlag(false),
+      m_bEnableOverflow(false),
+      m_bEnableRefresh(true),
+      m_rcOldContent(0.0f, 0.0f, 0.0f, 0.0f),
+      m_bEnableUndo(true),
+      m_bOprNotify(false) {}
+
+CPWL_EditImpl::~CPWL_EditImpl() {}
+
+void CPWL_EditImpl::Initialize() {
+  m_pVT->Initialize();
+  SetCaret(m_pVT->GetBeginWordPlace());
+  SetCaretOrigin();
+}
+
+void CPWL_EditImpl::SetFontMap(IPVT_FontMap* pFontMap) {
+  m_pVTProvider = pdfium::MakeUnique<CPWL_EditImpl_Provider>(pFontMap);
+  m_pVT->SetProvider(m_pVTProvider.get());
+}
+
+void CPWL_EditImpl::SetNotify(CPWL_EditCtrl* pNotify) {
+  m_pNotify = pNotify;
+}
+
+void CPWL_EditImpl::SetOprNotify(CPWL_Edit* pOprNotify) {
+  m_pOprNotify = pOprNotify;
+}
+
+CPWL_EditImpl_Iterator* CPWL_EditImpl::GetIterator() {
+  if (!m_pIterator) {
+    m_pIterator =
+        pdfium::MakeUnique<CPWL_EditImpl_Iterator>(this, m_pVT->GetIterator());
+  }
+  return m_pIterator.get();
+}
+
+IPVT_FontMap* CPWL_EditImpl::GetFontMap() {
+  return m_pVTProvider ? m_pVTProvider->GetFontMap() : nullptr;
+}
+
+void CPWL_EditImpl::SetPlateRect(const CFX_FloatRect& rect) {
+  m_pVT->SetPlateRect(rect);
+  m_ptScrollPos = CFX_PointF(rect.left, rect.top);
+  Paint();
+}
+
+void CPWL_EditImpl::SetAlignmentH(int32_t nFormat, bool bPaint) {
+  m_pVT->SetAlignment(nFormat);
+  if (bPaint)
+    Paint();
+}
+
+void CPWL_EditImpl::SetAlignmentV(int32_t nFormat, bool bPaint) {
+  m_nAlignment = nFormat;
+  if (bPaint)
+    Paint();
+}
+
+void CPWL_EditImpl::SetPasswordChar(uint16_t wSubWord, bool bPaint) {
+  m_pVT->SetPasswordChar(wSubWord);
+  if (bPaint)
+    Paint();
+}
+
+void CPWL_EditImpl::SetLimitChar(int32_t nLimitChar) {
+  m_pVT->SetLimitChar(nLimitChar);
+  Paint();
+}
+
+void CPWL_EditImpl::SetCharArray(int32_t nCharArray) {
+  m_pVT->SetCharArray(nCharArray);
+  Paint();
+}
+
+void CPWL_EditImpl::SetCharSpace(float fCharSpace) {
+  m_pVT->SetCharSpace(fCharSpace);
+  Paint();
+}
+
+void CPWL_EditImpl::SetMultiLine(bool bMultiLine, bool bPaint) {
+  m_pVT->SetMultiLine(bMultiLine);
+  if (bPaint)
+    Paint();
+}
+
+void CPWL_EditImpl::SetAutoReturn(bool bAuto, bool bPaint) {
+  m_pVT->SetAutoReturn(bAuto);
+  if (bPaint)
+    Paint();
+}
+
+void CPWL_EditImpl::SetAutoFontSize(bool bAuto, bool bPaint) {
+  m_pVT->SetAutoFontSize(bAuto);
+  if (bPaint)
+    Paint();
+}
+
+void CPWL_EditImpl::SetFontSize(float fFontSize) {
+  m_pVT->SetFontSize(fFontSize);
+  Paint();
+}
+
+void CPWL_EditImpl::SetAutoScroll(bool bAuto, bool bPaint) {
+  m_bEnableScroll = bAuto;
+  if (bPaint)
+    Paint();
+}
+
+void CPWL_EditImpl::SetTextOverflow(bool bAllowed, bool bPaint) {
+  m_bEnableOverflow = bAllowed;
+  if (bPaint)
+    Paint();
+}
+
+void CPWL_EditImpl::SetSelection(int32_t nStartChar, int32_t nEndChar) {
+  if (m_pVT->IsValid()) {
+    if (nStartChar == 0 && nEndChar < 0) {
+      SelectAll();
+    } else if (nStartChar < 0) {
+      SelectNone();
+    } else {
+      if (nStartChar < nEndChar) {
+        SetSelection(m_pVT->WordIndexToWordPlace(nStartChar),
+                     m_pVT->WordIndexToWordPlace(nEndChar));
+      } else {
+        SetSelection(m_pVT->WordIndexToWordPlace(nEndChar),
+                     m_pVT->WordIndexToWordPlace(nStartChar));
+      }
+    }
+  }
+}
+
+void CPWL_EditImpl::SetSelection(const CPVT_WordPlace& begin,
+                                 const CPVT_WordPlace& end) {
+  if (!m_pVT->IsValid())
+    return;
+
+  SelectNone();
+  m_SelState.Set(begin, end);
+  SetCaret(m_SelState.EndPos);
+  ScrollToCaret();
+  if (!m_SelState.IsEmpty())
+    Refresh();
+  SetCaretInfo();
+}
+
+void CPWL_EditImpl::GetSelection(int32_t& nStartChar, int32_t& nEndChar) const {
+  nStartChar = -1;
+  nEndChar = -1;
+  if (!m_pVT->IsValid())
+    return;
+
+  if (m_SelState.IsEmpty()) {
+    nStartChar = m_pVT->WordPlaceToWordIndex(m_wpCaret);
+    nEndChar = m_pVT->WordPlaceToWordIndex(m_wpCaret);
+    return;
+  }
+  if (m_SelState.BeginPos < m_SelState.EndPos) {
+    nStartChar = m_pVT->WordPlaceToWordIndex(m_SelState.BeginPos);
+    nEndChar = m_pVT->WordPlaceToWordIndex(m_SelState.EndPos);
+    return;
+  }
+  nStartChar = m_pVT->WordPlaceToWordIndex(m_SelState.EndPos);
+  nEndChar = m_pVT->WordPlaceToWordIndex(m_SelState.BeginPos);
+}
+
+int32_t CPWL_EditImpl::GetCaret() const {
+  if (m_pVT->IsValid())
+    return m_pVT->WordPlaceToWordIndex(m_wpCaret);
+
+  return -1;
+}
+
+CPVT_WordPlace CPWL_EditImpl::GetCaretWordPlace() const {
+  return m_wpCaret;
+}
+
+CFX_WideString CPWL_EditImpl::GetText() const {
+  CFX_WideString swRet;
+  if (!m_pVT->IsValid())
+    return swRet;
+
+  CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
+  pIterator->SetAt(0);
+
+  CPVT_Word wordinfo;
+  CPVT_WordPlace oldplace = pIterator->GetAt();
+  while (pIterator->NextWord()) {
+    CPVT_WordPlace place = pIterator->GetAt();
+    if (pIterator->GetWord(wordinfo))
+      swRet += wordinfo.Word;
+    if (oldplace.nSecIndex != place.nSecIndex)
+      swRet += L"\r\n";
+    oldplace = place;
+  }
+  return swRet;
+}
+
+CFX_WideString CPWL_EditImpl::GetRangeText(const CPVT_WordRange& range) const {
+  CFX_WideString swRet;
+  if (!m_pVT->IsValid())
+    return swRet;
+
+  CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
+  CPVT_WordRange wrTemp = range;
+  m_pVT->UpdateWordPlace(wrTemp.BeginPos);
+  m_pVT->UpdateWordPlace(wrTemp.EndPos);
+  pIterator->SetAt(wrTemp.BeginPos);
+
+  CPVT_Word wordinfo;
+  CPVT_WordPlace oldplace = wrTemp.BeginPos;
+  while (pIterator->NextWord()) {
+    CPVT_WordPlace place = pIterator->GetAt();
+    if (place > wrTemp.EndPos)
+      break;
+    if (pIterator->GetWord(wordinfo))
+      swRet += wordinfo.Word;
+    if (oldplace.nSecIndex != place.nSecIndex)
+      swRet += L"\r\n";
+    oldplace = place;
+  }
+  return swRet;
+}
+
+CFX_WideString CPWL_EditImpl::GetSelectedText() const {
+  return GetRangeText(m_SelState.ConvertToWordRange());
+}
+
+int32_t CPWL_EditImpl::GetTotalLines() const {
+  int32_t nLines = 1;
+
+  CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
+  pIterator->SetAt(0);
+  while (pIterator->NextLine())
+    ++nLines;
+
+  return nLines;
+}
+
+CPVT_WordRange CPWL_EditImpl::GetSelectWordRange() const {
+  return m_SelState.ConvertToWordRange();
+}
+
+void CPWL_EditImpl::SetText(const CFX_WideString& sText) {
+  Empty();
+  DoInsertText(CPVT_WordPlace(0, 0, -1), sText, FX_CHARSET_Default);
+  Paint();
+}
+
+bool CPWL_EditImpl::InsertWord(uint16_t word, int32_t charset) {
+  return InsertWord(word, charset, nullptr, true, true);
+}
+
+bool CPWL_EditImpl::InsertReturn() {
+  return InsertReturn(nullptr, nullptr, true, true);
+}
+
+bool CPWL_EditImpl::Backspace() {
+  return Backspace(true, true);
+}
+
+bool CPWL_EditImpl::Delete() {
+  return Delete(true, true);
+}
+
+bool CPWL_EditImpl::ClearSelection() {
+  return Clear(true, true);
+}
+
+bool CPWL_EditImpl::InsertText(const CFX_WideString& sText, int32_t charset) {
+  return InsertText(sText, charset, true, true);
+}
+
+float CPWL_EditImpl::GetFontSize() const {
+  return m_pVT->GetFontSize();
+}
+
+uint16_t CPWL_EditImpl::GetPasswordChar() const {
+  return m_pVT->GetPasswordChar();
+}
+
+int32_t CPWL_EditImpl::GetCharArray() const {
+  return m_pVT->GetCharArray();
+}
+
+CFX_FloatRect CPWL_EditImpl::GetContentRect() const {
+  return VTToEdit(m_pVT->GetContentRect());
+}
+
+int32_t CPWL_EditImpl::GetHorzScale() const {
+  return m_pVT->GetHorzScale();
+}
+
+float CPWL_EditImpl::GetCharSpace() const {
+  return m_pVT->GetCharSpace();
+}
+
+CPVT_WordRange CPWL_EditImpl::GetWholeWordRange() const {
+  if (m_pVT->IsValid())
+    return CPVT_WordRange(m_pVT->GetBeginWordPlace(), m_pVT->GetEndWordPlace());
+
+  return CPVT_WordRange();
+}
+
+CPVT_WordRange CPWL_EditImpl::GetVisibleWordRange() const {
+  if (m_bEnableOverflow)
+    return GetWholeWordRange();
+
+  if (m_pVT->IsValid()) {
+    CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
+
+    CPVT_WordPlace place1 =
+        m_pVT->SearchWordPlace(EditToVT(CFX_PointF(rcPlate.left, rcPlate.top)));
+    CPVT_WordPlace place2 = m_pVT->SearchWordPlace(
+        EditToVT(CFX_PointF(rcPlate.right, rcPlate.bottom)));
+
+    return CPVT_WordRange(place1, place2);
+  }
+
+  return CPVT_WordRange();
+}
+
+CPVT_WordPlace CPWL_EditImpl::SearchWordPlace(const CFX_PointF& point) const {
+  if (m_pVT->IsValid()) {
+    return m_pVT->SearchWordPlace(EditToVT(point));
+  }
+
+  return CPVT_WordPlace();
+}
+
+void CPWL_EditImpl::Paint() {
+  if (m_pVT->IsValid()) {
+    RearrangeAll();
+    ScrollToCaret();
+    Refresh();
+    SetCaretOrigin();
+    SetCaretInfo();
+  }
+}
+
+void CPWL_EditImpl::RearrangeAll() {
+  if (m_pVT->IsValid()) {
+    m_pVT->UpdateWordPlace(m_wpCaret);
+    m_pVT->RearrangeAll();
+    m_pVT->UpdateWordPlace(m_wpCaret);
+    SetScrollInfo();
+    SetContentChanged();
+  }
+}
+
+void CPWL_EditImpl::RearrangePart(const CPVT_WordRange& range) {
+  if (m_pVT->IsValid()) {
+    m_pVT->UpdateWordPlace(m_wpCaret);
+    m_pVT->RearrangePart(range);
+    m_pVT->UpdateWordPlace(m_wpCaret);
+    SetScrollInfo();
+    SetContentChanged();
+  }
+}
+
+void CPWL_EditImpl::SetContentChanged() {
+  if (m_pNotify) {
+    CFX_FloatRect rcContent = m_pVT->GetContentRect();
+    if (rcContent.Width() != m_rcOldContent.Width() ||
+        rcContent.Height() != m_rcOldContent.Height()) {
+      m_rcOldContent = rcContent;
+    }
+  }
+}
+
+void CPWL_EditImpl::SelectAll() {
+  if (!m_pVT->IsValid())
+    return;
+  m_SelState = CPWL_EditImpl_Select(GetWholeWordRange());
+  SetCaret(m_SelState.EndPos);
+  ScrollToCaret();
+  Refresh();
+  SetCaretInfo();
+}
+
+void CPWL_EditImpl::SelectNone() {
+  if (!m_pVT->IsValid() || m_SelState.IsEmpty())
+    return;
+
+  m_SelState.Reset();
+  Refresh();
+}
+
+bool CPWL_EditImpl::IsSelected() const {
+  return !m_SelState.IsEmpty();
+}
+
+CFX_PointF CPWL_EditImpl::VTToEdit(const CFX_PointF& point) const {
+  CFX_FloatRect rcContent = m_pVT->GetContentRect();
+  CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
+
+  float fPadding = 0.0f;
+
+  switch (m_nAlignment) {
+    case 0:
+      fPadding = 0.0f;
+      break;
+    case 1:
+      fPadding = (rcPlate.Height() - rcContent.Height()) * 0.5f;
+      break;
+    case 2:
+      fPadding = rcPlate.Height() - rcContent.Height();
+      break;
+  }
+
+  return CFX_PointF(point.x - (m_ptScrollPos.x - rcPlate.left),
+                    point.y - (m_ptScrollPos.y + fPadding - rcPlate.top));
+}
+
+CFX_PointF CPWL_EditImpl::EditToVT(const CFX_PointF& point) const {
+  CFX_FloatRect rcContent = m_pVT->GetContentRect();
+  CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
+
+  float fPadding = 0.0f;
+
+  switch (m_nAlignment) {
+    case 0:
+      fPadding = 0.0f;
+      break;
+    case 1:
+      fPadding = (rcPlate.Height() - rcContent.Height()) * 0.5f;
+      break;
+    case 2:
+      fPadding = rcPlate.Height() - rcContent.Height();
+      break;
+  }
+
+  return CFX_PointF(point.x + (m_ptScrollPos.x - rcPlate.left),
+                    point.y + (m_ptScrollPos.y + fPadding - rcPlate.top));
+}
+
+CFX_FloatRect CPWL_EditImpl::VTToEdit(const CFX_FloatRect& rect) const {
+  CFX_PointF ptLeftBottom = VTToEdit(CFX_PointF(rect.left, rect.bottom));
+  CFX_PointF ptRightTop = VTToEdit(CFX_PointF(rect.right, rect.top));
+
+  return CFX_FloatRect(ptLeftBottom.x, ptLeftBottom.y, ptRightTop.x,
+                       ptRightTop.y);
+}
+
+void CPWL_EditImpl::SetScrollInfo() {
+  if (!m_pNotify)
+    return;
+
+  CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
+  CFX_FloatRect rcContent = m_pVT->GetContentRect();
+  if (m_bNotifyFlag)
+    return;
+
+  CFX_AutoRestorer<bool> restorer(&m_bNotifyFlag);
+  m_bNotifyFlag = true;
+
+  PWL_SCROLL_INFO Info;
+  Info.fPlateWidth = rcPlate.top - rcPlate.bottom;
+  Info.fContentMin = rcContent.bottom;
+  Info.fContentMax = rcContent.top;
+  Info.fSmallStep = rcPlate.Height() / 3;
+  Info.fBigStep = rcPlate.Height();
+  m_pNotify->SetScrollInfo(Info);
+}
+
+void CPWL_EditImpl::SetScrollPosX(float fx) {
+  if (!m_bEnableScroll)
+    return;
+
+  if (m_pVT->IsValid()) {
+    if (!IsFloatEqual(m_ptScrollPos.x, fx)) {
+      m_ptScrollPos.x = fx;
+      Refresh();
+    }
+  }
+}
+
+void CPWL_EditImpl::SetScrollPosY(float fy) {
+  if (!m_bEnableScroll)
+    return;
+
+  if (m_pVT->IsValid()) {
+    if (!IsFloatEqual(m_ptScrollPos.y, fy)) {
+      m_ptScrollPos.y = fy;
+      Refresh();
+
+      if (m_pNotify) {
+        if (!m_bNotifyFlag) {
+          CFX_AutoRestorer<bool> restorer(&m_bNotifyFlag);
+          m_bNotifyFlag = true;
+          m_pNotify->SetScrollPosition(fy);
+        }
+      }
+    }
+  }
+}
+
+void CPWL_EditImpl::SetScrollPos(const CFX_PointF& point) {
+  SetScrollPosX(point.x);
+  SetScrollPosY(point.y);
+  SetScrollLimit();
+  SetCaretInfo();
+}
+
+CFX_PointF CPWL_EditImpl::GetScrollPos() const {
+  return m_ptScrollPos;
+}
+
+void CPWL_EditImpl::SetScrollLimit() {
+  if (m_pVT->IsValid()) {
+    CFX_FloatRect rcContent = m_pVT->GetContentRect();
+    CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
+
+    if (rcPlate.Width() > rcContent.Width()) {
+      SetScrollPosX(rcPlate.left);
+    } else {
+      if (IsFloatSmaller(m_ptScrollPos.x, rcContent.left)) {
+        SetScrollPosX(rcContent.left);
+      } else if (IsFloatBigger(m_ptScrollPos.x,
+                               rcContent.right - rcPlate.Width())) {
+        SetScrollPosX(rcContent.right - rcPlate.Width());
+      }
+    }
+
+    if (rcPlate.Height() > rcContent.Height()) {
+      SetScrollPosY(rcPlate.top);
+    } else {
+      if (IsFloatSmaller(m_ptScrollPos.y,
+                         rcContent.bottom + rcPlate.Height())) {
+        SetScrollPosY(rcContent.bottom + rcPlate.Height());
+      } else if (IsFloatBigger(m_ptScrollPos.y, rcContent.top)) {
+        SetScrollPosY(rcContent.top);
+      }
+    }
+  }
+}
+
+void CPWL_EditImpl::ScrollToCaret() {
+  SetScrollLimit();
+
+  if (!m_pVT->IsValid())
+    return;
+
+  CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
+  pIterator->SetAt(m_wpCaret);
+
+  CFX_PointF ptHead;
+  CFX_PointF ptFoot;
+  CPVT_Word word;
+  CPVT_Line line;
+  if (pIterator->GetWord(word)) {
+    ptHead.x = word.ptWord.x + word.fWidth;
+    ptHead.y = word.ptWord.y + word.fAscent;
+    ptFoot.x = word.ptWord.x + word.fWidth;
+    ptFoot.y = word.ptWord.y + word.fDescent;
+  } else if (pIterator->GetLine(line)) {
+    ptHead.x = line.ptLine.x;
+    ptHead.y = line.ptLine.y + line.fLineAscent;
+    ptFoot.x = line.ptLine.x;
+    ptFoot.y = line.ptLine.y + line.fLineDescent;
+  }
+
+  CFX_PointF ptHeadEdit = VTToEdit(ptHead);
+  CFX_PointF ptFootEdit = VTToEdit(ptFoot);
+  CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
+  if (!IsFloatEqual(rcPlate.left, rcPlate.right)) {
+    if (IsFloatSmaller(ptHeadEdit.x, rcPlate.left) ||
+        IsFloatEqual(ptHeadEdit.x, rcPlate.left)) {
+      SetScrollPosX(ptHead.x);
+    } else if (IsFloatBigger(ptHeadEdit.x, rcPlate.right)) {
+      SetScrollPosX(ptHead.x - rcPlate.Width());
+    }
+  }
+
+  if (!IsFloatEqual(rcPlate.top, rcPlate.bottom)) {
+    if (IsFloatSmaller(ptFootEdit.y, rcPlate.bottom) ||
+        IsFloatEqual(ptFootEdit.y, rcPlate.bottom)) {
+      if (IsFloatSmaller(ptHeadEdit.y, rcPlate.top)) {
+        SetScrollPosY(ptFoot.y + rcPlate.Height());
+      }
+    } else if (IsFloatBigger(ptHeadEdit.y, rcPlate.top)) {
+      if (IsFloatBigger(ptFootEdit.y, rcPlate.bottom)) {
+        SetScrollPosY(ptHead.y);
+      }
+    }
+  }
+}
+
+void CPWL_EditImpl::Refresh() {
+  if (m_bEnableRefresh && m_pVT->IsValid()) {
+    m_Refresh.BeginRefresh();
+    RefreshPushLineRects(GetVisibleWordRange());
+
+    m_Refresh.NoAnalyse();
+    m_ptRefreshScrollPos = m_ptScrollPos;
+
+    if (m_pNotify) {
+      if (!m_bNotifyFlag) {
+        CFX_AutoRestorer<bool> restorer(&m_bNotifyFlag);
+        m_bNotifyFlag = true;
+        if (const CPWL_EditImpl_RectArray* pRects =
+                m_Refresh.GetRefreshRects()) {
+          for (int32_t i = 0, sz = pRects->GetSize(); i < sz; i++)
+            m_pNotify->InvalidateRect(pRects->GetAt(i));
+        }
+      }
+    }
+
+    m_Refresh.EndRefresh();
+  }
+}
+
+void CPWL_EditImpl::RefreshPushLineRects(const CPVT_WordRange& wr) {
+  if (!m_pVT->IsValid())
+    return;
+
+  CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
+  CPVT_WordPlace wpBegin = wr.BeginPos;
+  m_pVT->UpdateWordPlace(wpBegin);
+  CPVT_WordPlace wpEnd = wr.EndPos;
+  m_pVT->UpdateWordPlace(wpEnd);
+  pIterator->SetAt(wpBegin);
+
+  CPVT_Line lineinfo;
+  do {
+    if (!pIterator->GetLine(lineinfo))
+      break;
+    if (lineinfo.lineplace.LineCmp(wpEnd) > 0)
+      break;
+
+    CFX_FloatRect rcLine(lineinfo.ptLine.x,
+                         lineinfo.ptLine.y + lineinfo.fLineDescent,
+                         lineinfo.ptLine.x + lineinfo.fLineWidth,
+                         lineinfo.ptLine.y + lineinfo.fLineAscent);
+
+    m_Refresh.Push(CPVT_WordRange(lineinfo.lineplace, lineinfo.lineEnd),
+                   VTToEdit(rcLine));
+  } while (pIterator->NextLine());
+}
+
+void CPWL_EditImpl::RefreshWordRange(const CPVT_WordRange& wr) {
+  CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
+  CPVT_WordRange wrTemp = wr;
+
+  m_pVT->UpdateWordPlace(wrTemp.BeginPos);
+  m_pVT->UpdateWordPlace(wrTemp.EndPos);
+  pIterator->SetAt(wrTemp.BeginPos);
+
+  CPVT_Word wordinfo;
+  CPVT_Line lineinfo;
+  CPVT_WordPlace place;
+
+  while (pIterator->NextWord()) {
+    place = pIterator->GetAt();
+    if (place > wrTemp.EndPos)
+      break;
+
+    pIterator->GetWord(wordinfo);
+    pIterator->GetLine(lineinfo);
+    if (place.LineCmp(wrTemp.BeginPos) == 0 ||
+        place.LineCmp(wrTemp.EndPos) == 0) {
+      CFX_FloatRect rcWord(wordinfo.ptWord.x,
+                           lineinfo.ptLine.y + lineinfo.fLineDescent,
+                           wordinfo.ptWord.x + wordinfo.fWidth,
+                           lineinfo.ptLine.y + lineinfo.fLineAscent);
+
+      if (m_pNotify) {
+        if (!m_bNotifyFlag) {
+          CFX_AutoRestorer<bool> restorer(&m_bNotifyFlag);
+          m_bNotifyFlag = true;
+          CFX_FloatRect rcRefresh = VTToEdit(rcWord);
+          m_pNotify->InvalidateRect(&rcRefresh);
+        }
+      }
+    } else {
+      CFX_FloatRect rcLine(lineinfo.ptLine.x,
+                           lineinfo.ptLine.y + lineinfo.fLineDescent,
+                           lineinfo.ptLine.x + lineinfo.fLineWidth,
+                           lineinfo.ptLine.y + lineinfo.fLineAscent);
+
+      if (m_pNotify) {
+        if (!m_bNotifyFlag) {
+          CFX_AutoRestorer<bool> restorer(&m_bNotifyFlag);
+          m_bNotifyFlag = true;
+          CFX_FloatRect rcRefresh = VTToEdit(rcLine);
+          m_pNotify->InvalidateRect(&rcRefresh);
+        }
+      }
+
+      pIterator->NextLine();
+    }
+  }
+}
+
+void CPWL_EditImpl::SetCaret(const CPVT_WordPlace& place) {
+  m_wpOldCaret = m_wpCaret;
+  m_wpCaret = place;
+}
+
+void CPWL_EditImpl::SetCaretInfo() {
+  if (m_pNotify) {
+    if (!m_bNotifyFlag) {
+      CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
+      pIterator->SetAt(m_wpCaret);
+
+      CFX_PointF ptHead;
+      CFX_PointF ptFoot;
+      CPVT_Word word;
+      CPVT_Line line;
+      if (pIterator->GetWord(word)) {
+        ptHead.x = word.ptWord.x + word.fWidth;
+        ptHead.y = word.ptWord.y + word.fAscent;
+        ptFoot.x = word.ptWord.x + word.fWidth;
+        ptFoot.y = word.ptWord.y + word.fDescent;
+      } else if (pIterator->GetLine(line)) {
+        ptHead.x = line.ptLine.x;
+        ptHead.y = line.ptLine.y + line.fLineAscent;
+        ptFoot.x = line.ptLine.x;
+        ptFoot.y = line.ptLine.y + line.fLineDescent;
+      }
+
+      CFX_AutoRestorer<bool> restorer(&m_bNotifyFlag);
+      m_bNotifyFlag = true;
+      m_pNotify->SetCaret(m_SelState.IsEmpty(), VTToEdit(ptHead),
+                          VTToEdit(ptFoot));
+    }
+  }
+}
+
+void CPWL_EditImpl::OnMouseDown(const CFX_PointF& point,
+                                bool bShift,
+                                bool bCtrl) {
+  if (!m_pVT->IsValid())
+    return;
+
+  SelectNone();
+  SetCaret(m_pVT->SearchWordPlace(EditToVT(point)));
+  m_SelState.Set(m_wpCaret, m_wpCaret);
+  ScrollToCaret();
+  SetCaretOrigin();
+  SetCaretInfo();
+}
+
+void CPWL_EditImpl::OnMouseMove(const CFX_PointF& point,
+                                bool bShift,
+                                bool bCtrl) {
+  if (!m_pVT->IsValid())
+    return;
+
+  SetCaret(m_pVT->SearchWordPlace(EditToVT(point)));
+  if (m_wpCaret == m_wpOldCaret)
+    return;
+
+  m_SelState.SetEndPos(m_wpCaret);
+  ScrollToCaret();
+  Refresh();
+  SetCaretOrigin();
+  SetCaretInfo();
+}
+
+void CPWL_EditImpl::OnVK_UP(bool bShift, bool bCtrl) {
+  if (!m_pVT->IsValid())
+    return;
+
+  SetCaret(m_pVT->GetUpWordPlace(m_wpCaret, m_ptCaret));
+  if (bShift) {
+    if (m_SelState.IsEmpty())
+      m_SelState.Set(m_wpOldCaret, m_wpCaret);
+    else
+      m_SelState.SetEndPos(m_wpCaret);
+
+    if (m_wpOldCaret != m_wpCaret) {
+      ScrollToCaret();
+      Refresh();
+      SetCaretInfo();
+    }
+  } else {
+    SelectNone();
+    ScrollToCaret();
+    SetCaretInfo();
+  }
+}
+
+void CPWL_EditImpl::OnVK_DOWN(bool bShift, bool bCtrl) {
+  if (!m_pVT->IsValid())
+    return;
+
+  SetCaret(m_pVT->GetDownWordPlace(m_wpCaret, m_ptCaret));
+  if (bShift) {
+    if (m_SelState.IsEmpty())
+      m_SelState.Set(m_wpOldCaret, m_wpCaret);
+    else
+      m_SelState.SetEndPos(m_wpCaret);
+
+    if (m_wpOldCaret != m_wpCaret) {
+      ScrollToCaret();
+      Refresh();
+      SetCaretInfo();
+    }
+  } else {
+    SelectNone();
+    ScrollToCaret();
+    SetCaretInfo();
+  }
+}
+
+void CPWL_EditImpl::OnVK_LEFT(bool bShift, bool bCtrl) {
+  if (!m_pVT->IsValid())
+    return;
+
+  if (bShift) {
+    if (m_wpCaret == m_pVT->GetLineBeginPlace(m_wpCaret) &&
+        m_wpCaret != m_pVT->GetSectionBeginPlace(m_wpCaret)) {
+      SetCaret(m_pVT->GetPrevWordPlace(m_wpCaret));
+    }
+    SetCaret(m_pVT->GetPrevWordPlace(m_wpCaret));
+    if (m_SelState.IsEmpty())
+      m_SelState.Set(m_wpOldCaret, m_wpCaret);
+    else
+      m_SelState.SetEndPos(m_wpCaret);
+
+    if (m_wpOldCaret != m_wpCaret) {
+      ScrollToCaret();
+      Refresh();
+      SetCaretInfo();
+    }
+  } else {
+    if (!m_SelState.IsEmpty()) {
+      if (m_SelState.BeginPos < m_SelState.EndPos)
+        SetCaret(m_SelState.BeginPos);
+      else
+        SetCaret(m_SelState.EndPos);
+
+      SelectNone();
+      ScrollToCaret();
+      SetCaretInfo();
+    } else {
+      if (m_wpCaret == m_pVT->GetLineBeginPlace(m_wpCaret) &&
+          m_wpCaret != m_pVT->GetSectionBeginPlace(m_wpCaret)) {
+        SetCaret(m_pVT->GetPrevWordPlace(m_wpCaret));
+      }
+      SetCaret(m_pVT->GetPrevWordPlace(m_wpCaret));
+      ScrollToCaret();
+      SetCaretOrigin();
+      SetCaretInfo();
+    }
+  }
+}
+
+void CPWL_EditImpl::OnVK_RIGHT(bool bShift, bool bCtrl) {
+  if (!m_pVT->IsValid())
+    return;
+
+  if (bShift) {
+    SetCaret(m_pVT->GetNextWordPlace(m_wpCaret));
+    if (m_wpCaret == m_pVT->GetLineEndPlace(m_wpCaret) &&
+        m_wpCaret != m_pVT->GetSectionEndPlace(m_wpCaret))
+      SetCaret(m_pVT->GetNextWordPlace(m_wpCaret));
+
+    if (m_SelState.IsEmpty())
+      m_SelState.Set(m_wpOldCaret, m_wpCaret);
+    else
+      m_SelState.SetEndPos(m_wpCaret);
+
+    if (m_wpOldCaret != m_wpCaret) {
+      ScrollToCaret();
+      Refresh();
+      SetCaretInfo();
+    }
+  } else {
+    if (!m_SelState.IsEmpty()) {
+      if (m_SelState.BeginPos > m_SelState.EndPos)
+        SetCaret(m_SelState.BeginPos);
+      else
+        SetCaret(m_SelState.EndPos);
+
+      SelectNone();
+      ScrollToCaret();
+      SetCaretInfo();
+    } else {
+      SetCaret(m_pVT->GetNextWordPlace(m_wpCaret));
+      if (m_wpCaret == m_pVT->GetLineEndPlace(m_wpCaret) &&
+          m_wpCaret != m_pVT->GetSectionEndPlace(m_wpCaret)) {
+        SetCaret(m_pVT->GetNextWordPlace(m_wpCaret));
+      }
+      ScrollToCaret();
+      SetCaretOrigin();
+      SetCaretInfo();
+    }
+  }
+}
+
+void CPWL_EditImpl::OnVK_HOME(bool bShift, bool bCtrl) {
+  if (!m_pVT->IsValid())
+    return;
+
+  if (bShift) {
+    if (bCtrl)
+      SetCaret(m_pVT->GetBeginWordPlace());
+    else
+      SetCaret(m_pVT->GetLineBeginPlace(m_wpCaret));
+
+    if (m_SelState.IsEmpty())
+      m_SelState.Set(m_wpOldCaret, m_wpCaret);
+    else
+      m_SelState.SetEndPos(m_wpCaret);
+
+    ScrollToCaret();
+    Refresh();
+    SetCaretInfo();
+  } else {
+    if (!m_SelState.IsEmpty()) {
+      SetCaret(std::min(m_SelState.BeginPos, m_SelState.EndPos));
+      SelectNone();
+      ScrollToCaret();
+      SetCaretInfo();
+    } else {
+      if (bCtrl)
+        SetCaret(m_pVT->GetBeginWordPlace());
+      else
+        SetCaret(m_pVT->GetLineBeginPlace(m_wpCaret));
+
+      ScrollToCaret();
+      SetCaretOrigin();
+      SetCaretInfo();
+    }
+  }
+}
+
+void CPWL_EditImpl::OnVK_END(bool bShift, bool bCtrl) {
+  if (!m_pVT->IsValid())
+    return;
+
+  if (bShift) {
+    if (bCtrl)
+      SetCaret(m_pVT->GetEndWordPlace());
+    else
+      SetCaret(m_pVT->GetLineEndPlace(m_wpCaret));
+
+    if (m_SelState.IsEmpty())
+      m_SelState.Set(m_wpOldCaret, m_wpCaret);
+    else
+      m_SelState.SetEndPos(m_wpCaret);
+
+    ScrollToCaret();
+    Refresh();
+    SetCaretInfo();
+  } else {
+    if (!m_SelState.IsEmpty()) {
+      SetCaret(std::max(m_SelState.BeginPos, m_SelState.EndPos));
+      SelectNone();
+      ScrollToCaret();
+      SetCaretInfo();
+    } else {
+      if (bCtrl)
+        SetCaret(m_pVT->GetEndWordPlace());
+      else
+        SetCaret(m_pVT->GetLineEndPlace(m_wpCaret));
+
+      ScrollToCaret();
+      SetCaretOrigin();
+      SetCaretInfo();
+    }
+  }
+}
+
+bool CPWL_EditImpl::InsertWord(uint16_t word,
+                               int32_t charset,
+                               const CPVT_WordProps* pWordProps,
+                               bool bAddUndo,
+                               bool bPaint) {
+  if (IsTextOverflow() || !m_pVT->IsValid())
+    return false;
+
+  m_pVT->UpdateWordPlace(m_wpCaret);
+  SetCaret(m_pVT->InsertWord(m_wpCaret, word,
+                             GetCharSetFromUnicode(word, charset), pWordProps));
+  m_SelState.Set(m_wpCaret, m_wpCaret);
+  if (m_wpCaret == m_wpOldCaret)
+    return false;
+
+  if (bAddUndo && m_bEnableUndo) {
+    AddEditUndoItem(pdfium::MakeUnique<CFXEU_InsertWord>(
+        this, m_wpOldCaret, m_wpCaret, word, charset, pWordProps));
+  }
+  if (bPaint)
+    PaintInsertText(m_wpOldCaret, m_wpCaret);
+
+  if (m_bOprNotify && m_pOprNotify)
+    m_pOprNotify->OnInsertWord(m_wpCaret, m_wpOldCaret);
+
+  return true;
+}
+
+bool CPWL_EditImpl::InsertReturn(const CPVT_SecProps* pSecProps,
+                                 const CPVT_WordProps* pWordProps,
+                                 bool bAddUndo,
+                                 bool bPaint) {
+  if (IsTextOverflow() || !m_pVT->IsValid())
+    return false;
+
+  m_pVT->UpdateWordPlace(m_wpCaret);
+  SetCaret(m_pVT->InsertSection(m_wpCaret, pSecProps, pWordProps));
+  m_SelState.Set(m_wpCaret, m_wpCaret);
+  if (m_wpCaret == m_wpOldCaret)
+    return false;
+
+  if (bAddUndo && m_bEnableUndo) {
+    AddEditUndoItem(pdfium::MakeUnique<CFXEU_InsertReturn>(
+        this, m_wpOldCaret, m_wpCaret, pSecProps, pWordProps));
+  }
+  if (bPaint) {
+    RearrangePart(CPVT_WordRange(m_wpOldCaret, m_wpCaret));
+    ScrollToCaret();
+    Refresh();
+    SetCaretOrigin();
+    SetCaretInfo();
+  }
+  if (m_bOprNotify && m_pOprNotify)
+    m_pOprNotify->OnInsertReturn(m_wpCaret, m_wpOldCaret);
+
+  return true;
+}
+
+bool CPWL_EditImpl::Backspace(bool bAddUndo, bool bPaint) {
+  if (!m_pVT->IsValid() || m_wpCaret == m_pVT->GetBeginWordPlace())
+    return false;
+
+  CPVT_Section section;
+  CPVT_Word word;
+  if (bAddUndo) {
+    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
+    pIterator->SetAt(m_wpCaret);
+    pIterator->GetSection(section);
+    pIterator->GetWord(word);
+  }
+  m_pVT->UpdateWordPlace(m_wpCaret);
+  SetCaret(m_pVT->BackSpaceWord(m_wpCaret));
+  m_SelState.Set(m_wpCaret, m_wpCaret);
+  if (m_wpCaret == m_wpOldCaret)
+    return false;
+
+  if (bAddUndo && m_bEnableUndo) {
+    if (m_wpCaret.nSecIndex != m_wpOldCaret.nSecIndex) {
+      AddEditUndoItem(pdfium::MakeUnique<CFXEU_Backspace>(
+          this, m_wpOldCaret, m_wpCaret, word.Word, word.nCharset,
+          section.SecProps, section.WordProps));
+    } else {
+      AddEditUndoItem(pdfium::MakeUnique<CFXEU_Backspace>(
+          this, m_wpOldCaret, m_wpCaret, word.Word, word.nCharset,
+          section.SecProps, word.WordProps));
+    }
+  }
+  if (bPaint) {
+    RearrangePart(CPVT_WordRange(m_wpCaret, m_wpOldCaret));
+    ScrollToCaret();
+    Refresh();
+    SetCaretOrigin();
+    SetCaretInfo();
+  }
+  if (m_bOprNotify && m_pOprNotify)
+    m_pOprNotify->OnBackSpace(m_wpCaret, m_wpOldCaret);
+
+  return true;
+}
+
+bool CPWL_EditImpl::Delete(bool bAddUndo, bool bPaint) {
+  if (!m_pVT->IsValid() || m_wpCaret == m_pVT->GetEndWordPlace())
+    return false;
+
+  CPVT_Section section;
+  CPVT_Word word;
+  if (bAddUndo) {
+    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
+    pIterator->SetAt(m_pVT->GetNextWordPlace(m_wpCaret));
+    pIterator->GetSection(section);
+    pIterator->GetWord(word);
+  }
+  m_pVT->UpdateWordPlace(m_wpCaret);
+  bool bSecEnd = (m_wpCaret == m_pVT->GetSectionEndPlace(m_wpCaret));
+  SetCaret(m_pVT->DeleteWord(m_wpCaret));
+  m_SelState.Set(m_wpCaret, m_wpCaret);
+  if (bAddUndo && m_bEnableUndo) {
+    if (bSecEnd) {
+      AddEditUndoItem(pdfium::MakeUnique<CFXEU_Delete>(
+          this, m_wpOldCaret, m_wpCaret, word.Word, word.nCharset,
+          section.SecProps, section.WordProps, bSecEnd));
+    } else {
+      AddEditUndoItem(pdfium::MakeUnique<CFXEU_Delete>(
+          this, m_wpOldCaret, m_wpCaret, word.Word, word.nCharset,
+          section.SecProps, word.WordProps, bSecEnd));
+    }
+  }
+  if (bPaint) {
+    RearrangePart(CPVT_WordRange(m_wpOldCaret, m_wpCaret));
+    ScrollToCaret();
+    Refresh();
+    SetCaretOrigin();
+    SetCaretInfo();
+  }
+  if (m_bOprNotify && m_pOprNotify)
+    m_pOprNotify->OnDelete(m_wpCaret, m_wpOldCaret);
+
+  return true;
+}
+
+bool CPWL_EditImpl::Empty() {
+  if (m_pVT->IsValid()) {
+    m_pVT->DeleteWords(GetWholeWordRange());
+    SetCaret(m_pVT->GetBeginWordPlace());
+
+    return true;
+  }
+
+  return false;
+}
+
+bool CPWL_EditImpl::Clear(bool bAddUndo, bool bPaint) {
+  if (!m_pVT->IsValid() || m_SelState.IsEmpty())
+    return false;
+
+  CPVT_WordRange range = m_SelState.ConvertToWordRange();
+  if (bAddUndo && m_bEnableUndo) {
+    AddEditUndoItem(
+        pdfium::MakeUnique<CFXEU_Clear>(this, range, GetSelectedText()));
+  }
+
+  SelectNone();
+  SetCaret(m_pVT->DeleteWords(range));
+  m_SelState.Set(m_wpCaret, m_wpCaret);
+  if (bPaint) {
+    RearrangePart(range);
+    ScrollToCaret();
+    Refresh();
+    SetCaretOrigin();
+    SetCaretInfo();
+  }
+  if (m_bOprNotify && m_pOprNotify)
+    m_pOprNotify->OnClear(m_wpCaret, m_wpOldCaret);
+
+  return true;
+}
+
+bool CPWL_EditImpl::InsertText(const CFX_WideString& sText,
+                               int32_t charset,
+                               bool bAddUndo,
+                               bool bPaint) {
+  if (IsTextOverflow())
+    return false;
+
+  m_pVT->UpdateWordPlace(m_wpCaret);
+  SetCaret(DoInsertText(m_wpCaret, sText, charset));
+  m_SelState.Set(m_wpCaret, m_wpCaret);
+  if (m_wpCaret == m_wpOldCaret)
+    return false;
+
+  if (bAddUndo && m_bEnableUndo) {
+    AddEditUndoItem(pdfium::MakeUnique<CFXEU_InsertText>(
+        this, m_wpOldCaret, m_wpCaret, sText, charset));
+  }
+  if (bPaint)
+    PaintInsertText(m_wpOldCaret, m_wpCaret);
+
+  if (m_bOprNotify && m_pOprNotify)
+    m_pOprNotify->OnInsertText(m_wpCaret, m_wpOldCaret);
+
+  return true;
+}
+
+void CPWL_EditImpl::PaintInsertText(const CPVT_WordPlace& wpOld,
+                                    const CPVT_WordPlace& wpNew) {
+  if (m_pVT->IsValid()) {
+    RearrangePart(CPVT_WordRange(wpOld, wpNew));
+    ScrollToCaret();
+    Refresh();
+    SetCaretOrigin();
+    SetCaretInfo();
+  }
+}
+
+bool CPWL_EditImpl::Redo() {
+  if (m_bEnableUndo) {
+    if (m_Undo.CanRedo()) {
+      m_Undo.Redo();
+      return true;
+    }
+  }
+
+  return false;
+}
+
+bool CPWL_EditImpl::Undo() {
+  if (m_bEnableUndo) {
+    if (m_Undo.CanUndo()) {
+      m_Undo.Undo();
+      return true;
+    }
+  }
+
+  return false;
+}
+
+void CPWL_EditImpl::SetCaretOrigin() {
+  if (!m_pVT->IsValid())
+    return;
+
+  CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
+  pIterator->SetAt(m_wpCaret);
+  CPVT_Word word;
+  CPVT_Line line;
+  if (pIterator->GetWord(word)) {
+    m_ptCaret.x = word.ptWord.x + word.fWidth;
+    m_ptCaret.y = word.ptWord.y;
+  } else if (pIterator->GetLine(line)) {
+    m_ptCaret.x = line.ptLine.x;
+    m_ptCaret.y = line.ptLine.y;
+  }
+}
+
+CPVT_WordPlace CPWL_EditImpl::WordIndexToWordPlace(int32_t index) const {
+  if (m_pVT->IsValid())
+    return m_pVT->WordIndexToWordPlace(index);
+
+  return CPVT_WordPlace();
+}
+
+bool CPWL_EditImpl::IsTextFull() const {
+  int32_t nTotalWords = m_pVT->GetTotalWords();
+  int32_t nLimitChar = m_pVT->GetLimitChar();
+  int32_t nCharArray = m_pVT->GetCharArray();
+
+  return IsTextOverflow() || (nLimitChar > 0 && nTotalWords >= nLimitChar) ||
+         (nCharArray > 0 && nTotalWords >= nCharArray);
+}
+
+bool CPWL_EditImpl::IsTextOverflow() const {
+  if (!m_bEnableScroll && !m_bEnableOverflow) {
+    CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
+    CFX_FloatRect rcContent = m_pVT->GetContentRect();
+
+    if (m_pVT->IsMultiLine() && GetTotalLines() > 1 &&
+        IsFloatBigger(rcContent.Height(), rcPlate.Height())) {
+      return true;
+    }
+
+    if (IsFloatBigger(rcContent.Width(), rcPlate.Width()))
+      return true;
+  }
+
+  return false;
+}
+
+bool CPWL_EditImpl::CanUndo() const {
+  if (m_bEnableUndo) {
+    return m_Undo.CanUndo();
+  }
+
+  return false;
+}
+
+bool CPWL_EditImpl::CanRedo() const {
+  if (m_bEnableUndo) {
+    return m_Undo.CanRedo();
+  }
+
+  return false;
+}
+
+void CPWL_EditImpl::EnableRefresh(bool bRefresh) {
+  m_bEnableRefresh = bRefresh;
+}
+
+void CPWL_EditImpl::EnableUndo(bool bUndo) {
+  m_bEnableUndo = bUndo;
+}
+
+void CPWL_EditImpl::EnableOprNotify(bool bNotify) {
+  m_bOprNotify = bNotify;
+}
+
+CPVT_WordPlace CPWL_EditImpl::DoInsertText(const CPVT_WordPlace& place,
+                                           const CFX_WideString& sText,
+                                           int32_t charset) {
+  CPVT_WordPlace wp = place;
+
+  if (m_pVT->IsValid()) {
+    for (int32_t i = 0, sz = sText.GetLength(); i < sz; i++) {
+      uint16_t word = sText[i];
+      switch (word) {
+        case 0x0D:
+          wp = m_pVT->InsertSection(wp, nullptr, nullptr);
+          if (sText[i + 1] == 0x0A)
+            i++;
+          break;
+        case 0x0A:
+          wp = m_pVT->InsertSection(wp, nullptr, nullptr);
+          if (sText[i + 1] == 0x0D)
+            i++;
+          break;
+        case 0x09:
+          word = 0x20;
+        default:
+          wp = m_pVT->InsertWord(wp, word, GetCharSetFromUnicode(word, charset),
+                                 nullptr);
+          break;
+      }
+    }
+  }
+
+  return wp;
+}
+
+int32_t CPWL_EditImpl::GetCharSetFromUnicode(uint16_t word,
+                                             int32_t nOldCharset) {
+  if (IPVT_FontMap* pFontMap = GetFontMap())
+    return pFontMap->CharSetFromUnicode(word, nOldCharset);
+  return nOldCharset;
+}
+
+void CPWL_EditImpl::AddEditUndoItem(
+    std::unique_ptr<CPWL_EditImpl_UndoItem> pEditUndoItem) {
+  m_Undo.AddItem(std::move(pEditUndoItem));
+}
+
+CFX_ByteString CPWL_EditImpl::GetPDFWordString(int32_t nFontIndex,
+                                               uint16_t Word,
+                                               uint16_t SubWord) {
+  IPVT_FontMap* pFontMap = GetFontMap();
+  CPDF_Font* pPDFFont = pFontMap->GetPDFFont(nFontIndex);
+  if (!pPDFFont)
+    return CFX_ByteString();
+
+  CFX_ByteString sWord;
+  if (SubWord > 0) {
+    Word = SubWord;
+  } else {
+    uint32_t dwCharCode = pPDFFont->IsUnicodeCompatible()
+                              ? pPDFFont->CharCodeFromUnicode(Word)
+                              : pFontMap->CharCodeFromUnicode(nFontIndex, Word);
+    if (dwCharCode > 0) {
+      pPDFFont->AppendChar(&sWord, dwCharCode);
+      return sWord;
+    }
+  }
+  pPDFFont->AppendChar(&sWord, Word);
+  return sWord;
+}
+
+CPWL_EditImpl_LineRectArray::CPWL_EditImpl_LineRectArray() {}
+
+CPWL_EditImpl_LineRectArray::~CPWL_EditImpl_LineRectArray() {}
+
+void CPWL_EditImpl_LineRectArray::operator=(
+    CPWL_EditImpl_LineRectArray&& that) {
+  m_LineRects = std::move(that.m_LineRects);
+}
+
+void CPWL_EditImpl_LineRectArray::Add(const CPVT_WordRange& wrLine,
+                                      const CFX_FloatRect& rcLine) {
+  m_LineRects.push_back(
+      pdfium::MakeUnique<CPWL_EditImpl_LineRect>(wrLine, rcLine));
+}
+
+int32_t CPWL_EditImpl_LineRectArray::GetSize() const {
+  return pdfium::CollectionSize<int32_t>(m_LineRects);
+}
+
+CPWL_EditImpl_LineRect* CPWL_EditImpl_LineRectArray::GetAt(
+    int32_t nIndex) const {
+  if (nIndex < 0 || nIndex >= GetSize())
+    return nullptr;
+
+  return m_LineRects[nIndex].get();
+}
+
+CPWL_EditImpl_Select::CPWL_EditImpl_Select() {}
+
+CPWL_EditImpl_Select::CPWL_EditImpl_Select(const CPVT_WordRange& range) {
+  Set(range.BeginPos, range.EndPos);
+}
+
+CPVT_WordRange CPWL_EditImpl_Select::ConvertToWordRange() const {
+  return CPVT_WordRange(BeginPos, EndPos);
+}
+
+void CPWL_EditImpl_Select::Reset() {
+  BeginPos.Reset();
+  EndPos.Reset();
+}
+
+void CPWL_EditImpl_Select::Set(const CPVT_WordPlace& begin,
+                               const CPVT_WordPlace& end) {
+  BeginPos = begin;
+  EndPos = end;
+}
+
+void CPWL_EditImpl_Select::SetEndPos(const CPVT_WordPlace& end) {
+  EndPos = end;
+}
+
+bool CPWL_EditImpl_Select::IsEmpty() const {
+  return BeginPos == EndPos;
+}
+
+CPWL_EditImpl_RectArray::CPWL_EditImpl_RectArray() {}
+
+CPWL_EditImpl_RectArray::~CPWL_EditImpl_RectArray() {}
+
+void CPWL_EditImpl_RectArray::Clear() {
+  m_Rects.clear();
+}
+
+void CPWL_EditImpl_RectArray::Add(const CFX_FloatRect& rect) {
+  // check for overlapped area
+  for (const auto& pRect : m_Rects) {
+    if (pRect && pRect->Contains(rect))
+      return;
+  }
+  m_Rects.push_back(pdfium::MakeUnique<CFX_FloatRect>(rect));
+}
+
+int32_t CPWL_EditImpl_RectArray::GetSize() const {
+  return pdfium::CollectionSize<int32_t>(m_Rects);
+}
+
+CFX_FloatRect* CPWL_EditImpl_RectArray::GetAt(int32_t nIndex) const {
+  if (nIndex < 0 || nIndex >= GetSize())
+    return nullptr;
+
+  return m_Rects[nIndex].get();
+}
diff --git a/fpdfsdk/pdfwindow/cpwl_edit_impl.h b/fpdfsdk/pdfwindow/cpwl_edit_impl.h
new file mode 100644
index 0000000000..53ed8da0c2
--- /dev/null
+++ b/fpdfsdk/pdfwindow/cpwl_edit_impl.h
@@ -0,0 +1,515 @@
+// 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 FPDFSDK_PDFWINDOW_CPWL_EDIT_IMPL_H_
+#define FPDFSDK_PDFWINDOW_CPWL_EDIT_IMPL_H_
+
+#include <deque>
+#include <memory>
+#include <vector>
+
+#include "core/fpdfdoc/cpvt_secprops.h"
+#include "core/fpdfdoc/cpvt_wordprops.h"
+#include "core/fxcrt/cfx_unowned_ptr.h"
+
+#define FX_EDIT_ISLATINWORD(u)                  \
+  (u == 0x2D || (u <= 0x005A && u >= 0x0041) || \
+   (u <= 0x007A && u >= 0x0061) || (u <= 0x02AF && u >= 0x00C0))
+
+class CFFL_FormFiller;
+class CPWL_EditImpl;
+class CPWL_EditImpl_Iterator;
+class CPWL_EditImpl_Provider;
+class CFX_RenderDevice;
+class CFX_SystemHandler;
+class CPWL_Edit;
+class CPWL_EditCtrl;
+class IFX_Edit_UndoItem;
+
+struct CPWL_EditImpl_LineRect {
+  CPWL_EditImpl_LineRect(const CPVT_WordRange& wrLine,
+                         const CFX_FloatRect& rcLine)
+      : m_wrLine(wrLine), m_rcLine(rcLine) {}
+
+  CPVT_WordRange m_wrLine;
+  CFX_FloatRect m_rcLine;
+};
+
+class CPWL_EditImpl_LineRectArray {
+ public:
+  CPWL_EditImpl_LineRectArray();
+  ~CPWL_EditImpl_LineRectArray();
+
+  void operator=(CPWL_EditImpl_LineRectArray&& rects);
+  void Add(const CPVT_WordRange& wrLine, const CFX_FloatRect& rcLine);
+
+  int32_t GetSize() const;
+  CPWL_EditImpl_LineRect* GetAt(int32_t nIndex) const;
+
+ private:
+  std::vector<std::unique_ptr<CPWL_EditImpl_LineRect>> m_LineRects;
+};
+
+class CPWL_EditImpl_RectArray {
+ public:
+  CPWL_EditImpl_RectArray();
+  ~CPWL_EditImpl_RectArray();
+
+  void Clear();
+  void Add(const CFX_FloatRect& rect);
+
+  int32_t GetSize() const;
+  CFX_FloatRect* GetAt(int32_t nIndex) const;
+
+ private:
+  std::vector<std::unique_ptr<CFX_FloatRect>> m_Rects;
+};
+
+class CPWL_EditImpl_Refresh {
+ public:
+  CPWL_EditImpl_Refresh();
+  ~CPWL_EditImpl_Refresh();
+
+  void BeginRefresh();
+  void Push(const CPVT_WordRange& linerange, const CFX_FloatRect& rect);
+  void NoAnalyse();
+  const CPWL_EditImpl_RectArray* GetRefreshRects() const;
+  void EndRefresh();
+
+ private:
+  CPWL_EditImpl_LineRectArray m_NewLineRects;
+  CPWL_EditImpl_LineRectArray m_OldLineRects;
+  CPWL_EditImpl_RectArray m_RefreshRects;
+};
+
+class CPWL_EditImpl_Select {
+ public:
+  CPWL_EditImpl_Select();
+  explicit CPWL_EditImpl_Select(const CPVT_WordRange& range);
+
+  void Reset();
+  void Set(const CPVT_WordPlace& begin, const CPVT_WordPlace& end);
+  void SetEndPos(const CPVT_WordPlace& end);
+
+  CPVT_WordRange ConvertToWordRange() const;
+  bool IsEmpty() const;
+
+  CPVT_WordPlace BeginPos;
+  CPVT_WordPlace EndPos;
+};
+
+class CPWL_EditImpl_Undo {
+ public:
+  explicit CPWL_EditImpl_Undo(int32_t nBufsize);
+  ~CPWL_EditImpl_Undo();
+
+  void AddItem(std::unique_ptr<IFX_Edit_UndoItem> pItem);
+  void Undo();
+  void Redo();
+  bool CanUndo() const;
+  bool CanRedo() const;
+  void Reset();
+
+ private:
+  void RemoveHeads();
+  void RemoveTails();
+
+  std::deque<std::unique_ptr<IFX_Edit_UndoItem>> m_UndoItemStack;
+  size_t m_nCurUndoPos;
+  size_t m_nBufSize;
+  bool m_bWorking;
+};
+
+class IFX_Edit_UndoItem {
+ public:
+  virtual ~IFX_Edit_UndoItem() {}
+
+  virtual void Undo() = 0;
+  virtual void Redo() = 0;
+  virtual CFX_WideString GetUndoTitle() const = 0;
+};
+
+class CPWL_EditImpl_UndoItem : public IFX_Edit_UndoItem {
+ public:
+  CPWL_EditImpl_UndoItem();
+  ~CPWL_EditImpl_UndoItem() override;
+
+  CFX_WideString GetUndoTitle() const override;
+
+  void SetFirst(bool bFirst);
+  void SetLast(bool bLast);
+  bool IsLast();
+
+ private:
+  bool m_bFirst;
+  bool m_bLast;
+};
+
+class CFXEU_InsertWord : public CPWL_EditImpl_UndoItem {
+ public:
+  CFXEU_InsertWord(CPWL_EditImpl* pEdit,
+                   const CPVT_WordPlace& wpOldPlace,
+                   const CPVT_WordPlace& wpNewPlace,
+                   uint16_t word,
+                   int32_t charset,
+                   const CPVT_WordProps* pWordProps);
+  ~CFXEU_InsertWord() override;
+
+  // CPWL_EditImpl_UndoItem
+  void Redo() override;
+  void Undo() override;
+
+ private:
+  CFX_UnownedPtr<CPWL_EditImpl> m_pEdit;
+
+  CPVT_WordPlace m_wpOld;
+  CPVT_WordPlace m_wpNew;
+  uint16_t m_Word;
+  int32_t m_nCharset;
+  CPVT_WordProps m_WordProps;
+};
+
+class CFXEU_InsertReturn : public CPWL_EditImpl_UndoItem {
+ public:
+  CFXEU_InsertReturn(CPWL_EditImpl* pEdit,
+                     const CPVT_WordPlace& wpOldPlace,
+                     const CPVT_WordPlace& wpNewPlace,
+                     const CPVT_SecProps* pSecProps,
+                     const CPVT_WordProps* pWordProps);
+  ~CFXEU_InsertReturn() override;
+
+  // CPWL_EditImpl_UndoItem
+  void Redo() override;
+  void Undo() override;
+
+ private:
+  CFX_UnownedPtr<CPWL_EditImpl> m_pEdit;
+
+  CPVT_WordPlace m_wpOld;
+  CPVT_WordPlace m_wpNew;
+  CPVT_SecProps m_SecProps;
+  CPVT_WordProps m_WordProps;
+};
+
+class CFXEU_Backspace : public CPWL_EditImpl_UndoItem {
+ public:
+  CFXEU_Backspace(CPWL_EditImpl* pEdit,
+                  const CPVT_WordPlace& wpOldPlace,
+                  const CPVT_WordPlace& wpNewPlace,
+                  uint16_t word,
+                  int32_t charset,
+                  const CPVT_SecProps& SecProps,
+                  const CPVT_WordProps& WordProps);
+  ~CFXEU_Backspace() override;
+
+  // CPWL_EditImpl_UndoItem
+  void Redo() override;
+  void Undo() override;
+
+ private:
+  CFX_UnownedPtr<CPWL_EditImpl> m_pEdit;
+
+  CPVT_WordPlace m_wpOld;
+  CPVT_WordPlace m_wpNew;
+  uint16_t m_Word;
+  int32_t m_nCharset;
+  CPVT_SecProps m_SecProps;
+  CPVT_WordProps m_WordProps;
+};
+
+class CFXEU_Delete : public CPWL_EditImpl_UndoItem {
+ public:
+  CFXEU_Delete(CPWL_EditImpl* pEdit,
+               const CPVT_WordPlace& wpOldPlace,
+               const CPVT_WordPlace& wpNewPlace,
+               uint16_t word,
+               int32_t charset,
+               const CPVT_SecProps& SecProps,
+               const CPVT_WordProps& WordProps,
+               bool bSecEnd);
+  ~CFXEU_Delete() override;
+
+  // CPWL_EditImpl_UndoItem
+  void Redo() override;
+  void Undo() override;
+
+ private:
+  CFX_UnownedPtr<CPWL_EditImpl> m_pEdit;
+
+  CPVT_WordPlace m_wpOld;
+  CPVT_WordPlace m_wpNew;
+  uint16_t m_Word;
+  int32_t m_nCharset;
+  CPVT_SecProps m_SecProps;
+  CPVT_WordProps m_WordProps;
+  bool m_bSecEnd;
+};
+
+class CFXEU_Clear : public CPWL_EditImpl_UndoItem {
+ public:
+  CFXEU_Clear(CPWL_EditImpl* pEdit,
+              const CPVT_WordRange& wrSel,
+              const CFX_WideString& swText);
+  ~CFXEU_Clear() override;
+
+  // CPWL_EditImpl_UndoItem
+  void Redo() override;
+  void Undo() override;
+
+ private:
+  CFX_UnownedPtr<CPWL_EditImpl> m_pEdit;
+
+  CPVT_WordRange m_wrSel;
+  CFX_WideString m_swText;
+};
+
+class CFXEU_InsertText : public CPWL_EditImpl_UndoItem {
+ public:
+  CFXEU_InsertText(CPWL_EditImpl* pEdit,
+                   const CPVT_WordPlace& wpOldPlace,
+                   const CPVT_WordPlace& wpNewPlace,
+                   const CFX_WideString& swText,
+                   int32_t charset);
+  ~CFXEU_InsertText() override;
+
+  // CPWL_EditImpl_UndoItem
+  void Redo() override;
+  void Undo() override;
+
+ private:
+  CFX_UnownedPtr<CPWL_EditImpl> m_pEdit;
+
+  CPVT_WordPlace m_wpOld;
+  CPVT_WordPlace m_wpNew;
+  CFX_WideString m_swText;
+  int32_t m_nCharset;
+};
+
+class CPWL_EditImpl {
+ public:
+  static void DrawEdit(CFX_RenderDevice* pDevice,
+                       CFX_Matrix* pUser2Device,
+                       CPWL_EditImpl* pEdit,
+                       FX_COLORREF crTextFill,
+                       const CFX_FloatRect& rcClip,
+                       const CFX_PointF& ptOffset,
+                       const CPVT_WordRange* pRange,
+                       CFX_SystemHandler* pSystemHandler,
+                       CFFL_FormFiller* pFFLData);
+
+  CPWL_EditImpl();
+  ~CPWL_EditImpl();
+
+  void SetFontMap(IPVT_FontMap* pFontMap);
+  void SetNotify(CPWL_EditCtrl* pNotify);
+  void SetOprNotify(CPWL_Edit* pOprNotify);
+
+  // Returns an iterator for the contents. Should not be released.
+  CPWL_EditImpl_Iterator* GetIterator();
+  IPVT_FontMap* GetFontMap();
+  void Initialize();
+
+  // Set the bounding box of the text area.
+  void SetPlateRect(const CFX_FloatRect& rect);
+  void SetScrollPos(const CFX_PointF& point);
+
+  // Set the horizontal text alignment. (nFormat [0:left, 1:middle, 2:right])
+  void SetAlignmentH(int32_t nFormat, bool bPaint);
+  // Set the vertical text alignment. (nFormat [0:left, 1:middle, 2:right])
+  void SetAlignmentV(int32_t nFormat, bool bPaint);
+
+  // Set the substitution character for hidden text.
+  void SetPasswordChar(uint16_t wSubWord, bool bPaint);
+
+  // Set the maximum number of words in the text.
+  void SetLimitChar(int32_t nLimitChar);
+  void SetCharArray(int32_t nCharArray);
+  void SetCharSpace(float fCharSpace);
+  void SetMultiLine(bool bMultiLine, bool bPaint);
+  void SetAutoReturn(bool bAuto, bool bPaint);
+  void SetAutoFontSize(bool bAuto, bool bPaint);
+  void SetAutoScroll(bool bAuto, bool bPaint);
+  void SetFontSize(float fFontSize);
+  void SetTextOverflow(bool bAllowed, bool bPaint);
+  void OnMouseDown(const CFX_PointF& point, bool bShift, bool bCtrl);
+  void OnMouseMove(const CFX_PointF& point, bool bShift, bool bCtrl);
+  void OnVK_UP(bool bShift, bool bCtrl);
+  void OnVK_DOWN(bool bShift, bool bCtrl);
+  void OnVK_LEFT(bool bShift, bool bCtrl);
+  void OnVK_RIGHT(bool bShift, bool bCtrl);
+  void OnVK_HOME(bool bShift, bool bCtrl);
+  void OnVK_END(bool bShift, bool bCtrl);
+  void SetText(const CFX_WideString& sText);
+  bool InsertWord(uint16_t word, int32_t charset);
+  bool InsertReturn();
+  bool Backspace();
+  bool Delete();
+  bool ClearSelection();
+  bool InsertText(const CFX_WideString& sText, int32_t charset);
+  bool Redo();
+  bool Undo();
+  CPVT_WordPlace WordIndexToWordPlace(int32_t index) const;
+  CPVT_WordPlace SearchWordPlace(const CFX_PointF& point) const;
+  int32_t GetCaret() const;
+  CPVT_WordPlace GetCaretWordPlace() const;
+  CFX_WideString GetSelectedText() const;
+  CFX_WideString GetText() const;
+  float GetFontSize() const;
+  uint16_t GetPasswordChar() const;
+  CFX_PointF GetScrollPos() const;
+  int32_t GetCharArray() const;
+  CFX_FloatRect GetContentRect() const;
+  CFX_WideString GetRangeText(const CPVT_WordRange& range) const;
+  int32_t GetHorzScale() const;
+  float GetCharSpace() const;
+  void SetSelection(int32_t nStartChar, int32_t nEndChar);
+  void GetSelection(int32_t& nStartChar, int32_t& nEndChar) const;
+  void SelectAll();
+  void SelectNone();
+  bool IsSelected() const;
+  void Paint();
+  void EnableRefresh(bool bRefresh);
+  void RefreshWordRange(const CPVT_WordRange& wr);
+  CPVT_WordRange GetWholeWordRange() const;
+  CPVT_WordRange GetSelectWordRange() const;
+  void EnableUndo(bool bUndo);
+  void EnableOprNotify(bool bNotify);
+  bool IsTextFull() const;
+  bool IsTextOverflow() const;
+  bool CanUndo() const;
+  bool CanRedo() const;
+  CPVT_WordRange GetVisibleWordRange() const;
+
+  bool Empty();
+
+  CPVT_WordPlace DoInsertText(const CPVT_WordPlace& place,
+                              const CFX_WideString& sText,
+                              int32_t charset);
+  int32_t GetCharSetFromUnicode(uint16_t word, int32_t nOldCharset);
+
+  int32_t GetTotalLines() const;
+
+  CFX_ByteString GetPDFWordString(int32_t nFontIndex,
+                                  uint16_t Word,
+                                  uint16_t SubWord);
+
+ private:
+  friend class CPWL_EditImpl_Iterator;
+  friend class CFXEU_InsertWord;
+  friend class CFXEU_InsertReturn;
+  friend class CFXEU_Backspace;
+  friend class CFXEU_Delete;
+  friend class CFXEU_Clear;
+  friend class CFXEU_InsertText;
+
+  void SetSelection(const CPVT_WordPlace& begin, const CPVT_WordPlace& end);
+
+  void RearrangeAll();
+  void RearrangePart(const CPVT_WordRange& range);
+  void ScrollToCaret();
+  void SetScrollInfo();
+  void SetScrollPosX(float fx);
+  void SetScrollPosY(float fy);
+  void SetScrollLimit();
+  void SetContentChanged();
+
+  bool InsertWord(uint16_t word,
+                  int32_t charset,
+                  const CPVT_WordProps* pWordProps,
+                  bool bAddUndo,
+                  bool bPaint);
+  bool InsertReturn(const CPVT_SecProps* pSecProps,
+                    const CPVT_WordProps* pWordProps,
+                    bool bAddUndo,
+                    bool bPaint);
+  bool Backspace(bool bAddUndo, bool bPaint);
+  bool Delete(bool bAddUndo, bool bPaint);
+  bool Clear(bool bAddUndo, bool bPaint);
+  bool InsertText(const CFX_WideString& sText,
+                  int32_t charset,
+                  bool bAddUndo,
+                  bool bPaint);
+  void PaintInsertText(const CPVT_WordPlace& wpOld,
+                       const CPVT_WordPlace& wpNew);
+
+  inline CFX_PointF VTToEdit(const CFX_PointF& point) const;
+  inline CFX_PointF EditToVT(const CFX_PointF& point) const;
+  inline CFX_FloatRect VTToEdit(const CFX_FloatRect& rect) const;
+
+  void Refresh();
+  void RefreshPushLineRects(const CPVT_WordRange& wr);
+
+  void SetCaret(const CPVT_WordPlace& place);
+  void SetCaretInfo();
+  void SetCaretOrigin();
+
+  void AddEditUndoItem(std::unique_ptr<CPWL_EditImpl_UndoItem> pEditUndoItem);
+
+ private:
+  std::unique_ptr<CPDF_VariableText> m_pVT;
+  CFX_UnownedPtr<CPWL_EditCtrl> m_pNotify;
+  CFX_UnownedPtr<CPWL_Edit> m_pOprNotify;
+  std::unique_ptr<CPWL_EditImpl_Provider> m_pVTProvider;
+  CPVT_WordPlace m_wpCaret;
+  CPVT_WordPlace m_wpOldCaret;
+  CPWL_EditImpl_Select m_SelState;
+  CFX_PointF m_ptScrollPos;
+  CFX_PointF m_ptRefreshScrollPos;
+  bool m_bEnableScroll;
+  std::unique_ptr<CPWL_EditImpl_Iterator> m_pIterator;
+  CPWL_EditImpl_Refresh m_Refresh;
+  CFX_PointF m_ptCaret;
+  CPWL_EditImpl_Undo m_Undo;
+  int32_t m_nAlignment;
+  bool m_bNotifyFlag;
+  bool m_bEnableOverflow;
+  bool m_bEnableRefresh;
+  CFX_FloatRect m_rcOldContent;
+  bool m_bEnableUndo;
+  bool m_bOprNotify;
+};
+
+class CPWL_EditImpl_Iterator {
+ public:
+  CPWL_EditImpl_Iterator(CPWL_EditImpl* pEdit,
+                         CPDF_VariableText::Iterator* pVTIterator);
+  ~CPWL_EditImpl_Iterator();
+
+  bool NextWord();
+  bool PrevWord();
+  bool GetWord(CPVT_Word& word) const;
+  bool GetLine(CPVT_Line& line) const;
+  void SetAt(int32_t nWordIndex);
+  void SetAt(const CPVT_WordPlace& place);
+  const CPVT_WordPlace& GetAt() const;
+
+ private:
+  CFX_UnownedPtr<CPWL_EditImpl> m_pEdit;
+  CPDF_VariableText::Iterator* m_pVTIterator;
+};
+
+class CPWL_EditImpl_Provider : public CPDF_VariableText::Provider {
+ public:
+  explicit CPWL_EditImpl_Provider(IPVT_FontMap* pFontMap);
+  ~CPWL_EditImpl_Provider() override;
+
+  IPVT_FontMap* GetFontMap() const;
+
+  // CPDF_VariableText::Provider:
+  int32_t GetCharWidth(int32_t nFontIndex, uint16_t word) override;
+  int32_t GetTypeAscent(int32_t nFontIndex) override;
+  int32_t GetTypeDescent(int32_t nFontIndex) override;
+  int32_t GetWordFontIndex(uint16_t word,
+                           int32_t charset,
+                           int32_t nFontIndex) override;
+  int32_t GetDefaultFontIndex() override;
+  bool IsLatinWord(uint16_t word) override;
+
+ private:
+  IPVT_FontMap* m_pFontMap;
+};
+
+#endif  // FPDFSDK_PDFWINDOW_CPWL_EDIT_IMPL_H_
diff --git a/fpdfsdk/pdfwindow/cpwl_list_box.cpp b/fpdfsdk/pdfwindow/cpwl_list_box.cpp
index ffa5b4780f..7e820bfbfa 100644
--- a/fpdfsdk/pdfwindow/cpwl_list_box.cpp
+++ b/fpdfsdk/pdfwindow/cpwl_list_box.cpp
@@ -9,10 +9,10 @@
 #include <sstream>
 
 #include "core/fxge/cfx_renderdevice.h"
-#include "fpdfsdk/fxedit/fxet_edit.h"
-#include "fpdfsdk/fxedit/fxet_list.h"
 #include "fpdfsdk/pdfwindow/cpwl_edit.h"
 #include "fpdfsdk/pdfwindow/cpwl_edit_ctrl.h"
+#include "fpdfsdk/pdfwindow/cpwl_edit_impl.h"
+#include "fpdfsdk/pdfwindow/cpwl_list_impl.h"
 #include "fpdfsdk/pdfwindow/cpwl_scroll_bar.h"
 #include "fpdfsdk/pdfwindow/cpwl_wnd.h"
 #include "public/fpdf_fwlevent.h"
@@ -63,7 +63,7 @@ void CPWL_List_Notify::IOnInvalidateRect(CFX_FloatRect* pRect) {
 }
 
 CPWL_ListBox::CPWL_ListBox()
-    : m_pList(new CFX_ListCtrl),
+    : m_pList(new CPWL_ListCtrl),
       m_bMouseDown(false),
       m_bHoverSel(false),
       m_pFillerNotify(nullptr) {}
@@ -107,7 +107,7 @@ void CPWL_ListBox::DrawThisAppearance(CFX_RenderDevice* pDevice,
       continue;
 
     CFX_PointF ptOffset(rcItem.left, (rcItem.top + rcItem.bottom) * 0.5f);
-    if (CFX_Edit* pEdit = m_pList->GetItemEdit(i)) {
+    if (CPWL_EditImpl* pEdit = m_pList->GetItemEdit(i)) {
       CFX_FloatRect rcContent = pEdit->GetContentRect();
       if (rcContent.Width() > rcClient.Width())
         rcItem.Intersect(rcList);
@@ -118,22 +118,23 @@ void CPWL_ListBox::DrawThisAppearance(CFX_RenderDevice* pDevice,
     if (m_pList->IsItemSelected(i)) {
       CFX_SystemHandler* pSysHandler = GetSystemHandler();
       if (pSysHandler && pSysHandler->IsSelectionImplemented()) {
-        CFX_Edit::DrawEdit(pDevice, pUser2Device, m_pList->GetItemEdit(i),
-                           GetTextColor().ToFXColor(255), rcList, ptOffset,
-                           nullptr, pSysHandler, m_pFormFiller.Get());
+        CPWL_EditImpl::DrawEdit(pDevice, pUser2Device, m_pList->GetItemEdit(i),
+                                GetTextColor().ToFXColor(255), rcList, ptOffset,
+                                nullptr, pSysHandler, m_pFormFiller.Get());
         pSysHandler->OutputSelectedRect(m_pFormFiller.Get(), rcItem);
       } else {
         pDevice->DrawFillRect(pUser2Device, rcItem,
                               ArgbEncode(255, 0, 51, 113));
-        CFX_Edit::DrawEdit(pDevice, pUser2Device, m_pList->GetItemEdit(i),
-                           ArgbEncode(255, 255, 255, 255), rcList, ptOffset,
-                           nullptr, pSysHandler, m_pFormFiller.Get());
+        CPWL_EditImpl::DrawEdit(pDevice, pUser2Device, m_pList->GetItemEdit(i),
+                                ArgbEncode(255, 255, 255, 255), rcList,
+                                ptOffset, nullptr, pSysHandler,
+                                m_pFormFiller.Get());
       }
     } else {
       CFX_SystemHandler* pSysHandler = GetSystemHandler();
-      CFX_Edit::DrawEdit(pDevice, pUser2Device, m_pList->GetItemEdit(i),
-                         GetTextColor().ToFXColor(255), rcList, ptOffset,
-                         nullptr, pSysHandler, nullptr);
+      CPWL_EditImpl::DrawEdit(pDevice, pUser2Device, m_pList->GetItemEdit(i),
+                              GetTextColor().ToFXColor(255), rcList, ptOffset,
+                              nullptr, pSysHandler, nullptr);
     }
   }
 }
diff --git a/fpdfsdk/pdfwindow/cpwl_list_box.h b/fpdfsdk/pdfwindow/cpwl_list_box.h
index f41a6dd87f..d76c7a5c5a 100644
--- a/fpdfsdk/pdfwindow/cpwl_list_box.h
+++ b/fpdfsdk/pdfwindow/cpwl_list_box.h
@@ -12,7 +12,7 @@
 #include "core/fxcrt/cfx_unowned_ptr.h"
 #include "fpdfsdk/pdfwindow/cpwl_wnd.h"
 
-class CFX_ListCtrl;
+class CPWL_ListCtrl;
 class CPWL_List_Notify;
 class CPWL_ListBox;
 class IPWL_Filler_Notify;
@@ -97,7 +97,7 @@ class CPWL_ListBox : public CPWL_Wnd {
   void AttachFFLData(CFFL_FormFiller* pData) { m_pFormFiller = pData; }
 
  protected:
-  std::unique_ptr<CFX_ListCtrl> m_pList;
+  std::unique_ptr<CPWL_ListCtrl> m_pList;
   std::unique_ptr<CPWL_List_Notify> m_pListNotify;
   bool m_bMouseDown;
   bool m_bHoverSel;
diff --git a/fpdfsdk/pdfwindow/cpwl_list_impl.cpp b/fpdfsdk/pdfwindow/cpwl_list_impl.cpp
new file mode 100644
index 0000000000..66b2e77747
--- /dev/null
+++ b/fpdfsdk/pdfwindow/cpwl_list_impl.cpp
@@ -0,0 +1,637 @@
+// 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 "fpdfsdk/pdfwindow/cpwl_list_impl.h"
+
+#include <algorithm>
+#include <utility>
+
+#include "core/fpdfdoc/cpvt_word.h"
+#include "core/fxcrt/fx_extension.h"
+#include "fpdfsdk/pdfwindow/cpwl_edit_impl.h"
+#include "fpdfsdk/pdfwindow/cpwl_list_box.h"
+#include "third_party/base/stl_util.h"
+
+CPWL_ListCtrl::Item::Item()
+    : m_pEdit(new CPWL_EditImpl),
+      m_bSelected(false),
+      m_rcListItem(0.0f, 0.0f, 0.0f, 0.0f) {
+  m_pEdit->SetAlignmentV(1, true);
+  m_pEdit->Initialize();
+}
+
+CPWL_ListCtrl::Item::~Item() {}
+
+void CPWL_ListCtrl::Item::SetFontMap(IPVT_FontMap* pFontMap) {
+  m_pEdit->SetFontMap(pFontMap);
+}
+
+void CPWL_ListCtrl::Item::SetText(const CFX_WideString& text) {
+  m_pEdit->SetText(text);
+}
+
+void CPWL_ListCtrl::Item::SetFontSize(float fFontSize) {
+  m_pEdit->SetFontSize(fFontSize);
+}
+
+float CPWL_ListCtrl::Item::GetItemHeight() const {
+  return m_pEdit->GetContentRect().Height();
+}
+
+uint16_t CPWL_ListCtrl::Item::GetFirstChar() const {
+  CPVT_Word word;
+  CPWL_EditImpl_Iterator* pIterator = m_pEdit->GetIterator();
+  pIterator->SetAt(1);
+  pIterator->GetWord(word);
+  return word.Word;
+}
+
+CFX_WideString CPWL_ListCtrl::Item::GetText() const {
+  return m_pEdit->GetText();
+}
+
+CPLST_Select::CPLST_Select() {}
+
+CPLST_Select::~CPLST_Select() {}
+
+void CPLST_Select::Add(int32_t nItemIndex) {
+  m_Items[nItemIndex] = SELECTING;
+}
+
+void CPLST_Select::Add(int32_t nBeginIndex, int32_t nEndIndex) {
+  if (nBeginIndex > nEndIndex)
+    std::swap(nBeginIndex, nEndIndex);
+
+  for (int32_t i = nBeginIndex; i <= nEndIndex; ++i)
+    Add(i);
+}
+
+void CPLST_Select::Sub(int32_t nItemIndex) {
+  auto it = m_Items.find(nItemIndex);
+  if (it != m_Items.end())
+    it->second = DESELECTING;
+}
+
+void CPLST_Select::Sub(int32_t nBeginIndex, int32_t nEndIndex) {
+  if (nBeginIndex > nEndIndex)
+    std::swap(nBeginIndex, nEndIndex);
+
+  for (int32_t i = nBeginIndex; i <= nEndIndex; ++i)
+    Sub(i);
+}
+
+void CPLST_Select::DeselectAll() {
+  for (auto& item : m_Items)
+    item.second = DESELECTING;
+}
+
+void CPLST_Select::Done() {
+  auto it = m_Items.begin();
+  while (it != m_Items.end()) {
+    if (it->second == DESELECTING)
+      it = m_Items.erase(it);
+    else
+      (it++)->second = NORMAL;
+  }
+}
+
+CPWL_ListCtrl::CPWL_ListCtrl()
+    : m_pNotify(nullptr),
+      m_bNotifyFlag(false),
+      m_nSelItem(-1),
+      m_nFootIndex(-1),
+      m_bCtrlSel(false),
+      m_nCaretIndex(-1),
+      m_fFontSize(0.0f),
+      m_pFontMap(nullptr),
+      m_bMultiple(false) {}
+
+CPWL_ListCtrl::~CPWL_ListCtrl() {
+  Empty();
+}
+
+CFX_PointF CPWL_ListCtrl::InToOut(const CFX_PointF& point) const {
+  CFX_FloatRect rcPlate = m_rcPlate;
+  return CFX_PointF(point.x - (m_ptScrollPos.x - rcPlate.left),
+                    point.y - (m_ptScrollPos.y - rcPlate.top));
+}
+
+CFX_PointF CPWL_ListCtrl::OutToIn(const CFX_PointF& point) const {
+  CFX_FloatRect rcPlate = m_rcPlate;
+  return CFX_PointF(point.x + (m_ptScrollPos.x - rcPlate.left),
+                    point.y + (m_ptScrollPos.y - rcPlate.top));
+}
+
+CFX_FloatRect CPWL_ListCtrl::InToOut(const CFX_FloatRect& rect) const {
+  CFX_PointF ptLeftBottom = InToOut(CFX_PointF(rect.left, rect.bottom));
+  CFX_PointF ptRightTop = InToOut(CFX_PointF(rect.right, rect.top));
+  return CFX_FloatRect(ptLeftBottom.x, ptLeftBottom.y, ptRightTop.x,
+                       ptRightTop.y);
+}
+
+CFX_FloatRect CPWL_ListCtrl::OutToIn(const CFX_FloatRect& rect) const {
+  CFX_PointF ptLeftBottom = OutToIn(CFX_PointF(rect.left, rect.bottom));
+  CFX_PointF ptRightTop = OutToIn(CFX_PointF(rect.right, rect.top));
+  return CFX_FloatRect(ptLeftBottom.x, ptLeftBottom.y, ptRightTop.x,
+                       ptRightTop.y);
+}
+
+CFX_PointF CPWL_ListCtrl::InnerToOuter(const CFX_PointF& point) const {
+  return CFX_PointF(point.x + GetBTPoint().x, GetBTPoint().y - point.y);
+}
+
+CFX_PointF CPWL_ListCtrl::OuterToInner(const CFX_PointF& point) const {
+  return CFX_PointF(point.x - GetBTPoint().x, GetBTPoint().y - point.y);
+}
+
+CFX_FloatRect CPWL_ListCtrl::InnerToOuter(const CFX_FloatRect& rect) const {
+  CFX_PointF ptLeftTop = InnerToOuter(CFX_PointF(rect.left, rect.top));
+  CFX_PointF ptRightBottom = InnerToOuter(CFX_PointF(rect.right, rect.bottom));
+  return CFX_FloatRect(ptLeftTop.x, ptRightBottom.y, ptRightBottom.x,
+                       ptLeftTop.y);
+}
+
+CFX_FloatRect CPWL_ListCtrl::OuterToInner(const CFX_FloatRect& rect) const {
+  CFX_PointF ptLeftTop = OuterToInner(CFX_PointF(rect.left, rect.top));
+  CFX_PointF ptRightBottom = OuterToInner(CFX_PointF(rect.right, rect.bottom));
+  return CFX_FloatRect(ptLeftTop.x, ptRightBottom.y, ptRightBottom.x,
+                       ptLeftTop.y);
+}
+
+void CPWL_ListCtrl::OnMouseDown(const CFX_PointF& point,
+                                bool bShift,
+                                bool bCtrl) {
+  int32_t nHitIndex = GetItemIndex(point);
+
+  if (IsMultipleSel()) {
+    if (bCtrl) {
+      if (IsItemSelected(nHitIndex)) {
+        m_aSelItems.Sub(nHitIndex);
+        SelectItems();
+        m_bCtrlSel = false;
+      } else {
+        m_aSelItems.Add(nHitIndex);
+        SelectItems();
+        m_bCtrlSel = true;
+      }
+
+      m_nFootIndex = nHitIndex;
+    } else if (bShift) {
+      m_aSelItems.DeselectAll();
+      m_aSelItems.Add(m_nFootIndex, nHitIndex);
+      SelectItems();
+    } else {
+      m_aSelItems.DeselectAll();
+      m_aSelItems.Add(nHitIndex);
+      SelectItems();
+
+      m_nFootIndex = nHitIndex;
+    }
+
+    SetCaret(nHitIndex);
+  } else {
+    SetSingleSelect(nHitIndex);
+  }
+
+  if (!IsItemVisible(nHitIndex))
+    ScrollToListItem(nHitIndex);
+}
+
+void CPWL_ListCtrl::OnMouseMove(const CFX_PointF& point,
+                                bool bShift,
+                                bool bCtrl) {
+  int32_t nHitIndex = GetItemIndex(point);
+
+  if (IsMultipleSel()) {
+    if (bCtrl) {
+      if (m_bCtrlSel)
+        m_aSelItems.Add(m_nFootIndex, nHitIndex);
+      else
+        m_aSelItems.Sub(m_nFootIndex, nHitIndex);
+
+      SelectItems();
+    } else {
+      m_aSelItems.DeselectAll();
+      m_aSelItems.Add(m_nFootIndex, nHitIndex);
+      SelectItems();
+    }
+
+    SetCaret(nHitIndex);
+  } else {
+    SetSingleSelect(nHitIndex);
+  }
+
+  if (!IsItemVisible(nHitIndex))
+    ScrollToListItem(nHitIndex);
+}
+
+void CPWL_ListCtrl::OnVK(int32_t nItemIndex, bool bShift, bool bCtrl) {
+  if (IsMultipleSel()) {
+    if (nItemIndex >= 0 && nItemIndex < GetCount()) {
+      if (bCtrl) {
+      } else if (bShift) {
+        m_aSelItems.DeselectAll();
+        m_aSelItems.Add(m_nFootIndex, nItemIndex);
+        SelectItems();
+      } else {
+        m_aSelItems.DeselectAll();
+        m_aSelItems.Add(nItemIndex);
+        SelectItems();
+        m_nFootIndex = nItemIndex;
+      }
+
+      SetCaret(nItemIndex);
+    }
+  } else {
+    SetSingleSelect(nItemIndex);
+  }
+
+  if (!IsItemVisible(nItemIndex))
+    ScrollToListItem(nItemIndex);
+}
+
+void CPWL_ListCtrl::OnVK_UP(bool bShift, bool bCtrl) {
+  OnVK(IsMultipleSel() ? GetCaret() - 1 : GetSelect() - 1, bShift, bCtrl);
+}
+
+void CPWL_ListCtrl::OnVK_DOWN(bool bShift, bool bCtrl) {
+  OnVK(IsMultipleSel() ? GetCaret() + 1 : GetSelect() + 1, bShift, bCtrl);
+}
+
+void CPWL_ListCtrl::OnVK_LEFT(bool bShift, bool bCtrl) {
+  OnVK(0, bShift, bCtrl);
+}
+
+void CPWL_ListCtrl::OnVK_RIGHT(bool bShift, bool bCtrl) {
+  OnVK(GetCount() - 1, bShift, bCtrl);
+}
+
+void CPWL_ListCtrl::OnVK_HOME(bool bShift, bool bCtrl) {
+  OnVK(0, bShift, bCtrl);
+}
+
+void CPWL_ListCtrl::OnVK_END(bool bShift, bool bCtrl) {
+  OnVK(GetCount() - 1, bShift, bCtrl);
+}
+
+bool CPWL_ListCtrl::OnChar(uint16_t nChar, bool bShift, bool bCtrl) {
+  int32_t nIndex = GetLastSelected();
+  int32_t nFindIndex = FindNext(nIndex, nChar);
+
+  if (nFindIndex != nIndex) {
+    OnVK(nFindIndex, bShift, bCtrl);
+    return true;
+  }
+  return false;
+}
+
+void CPWL_ListCtrl::SetPlateRect(const CFX_FloatRect& rect) {
+  m_rcPlate = rect;
+  m_ptScrollPos.x = rect.left;
+  SetScrollPos(CFX_PointF(rect.left, rect.top));
+  ReArrange(0);
+  InvalidateItem(-1);
+}
+
+CFX_FloatRect CPWL_ListCtrl::GetItemRect(int32_t nIndex) const {
+  return InToOut(GetItemRectInternal(nIndex));
+}
+
+CFX_FloatRect CPWL_ListCtrl::GetItemRectInternal(int32_t nIndex) const {
+  if (!pdfium::IndexInBounds(m_ListItems, nIndex) || !m_ListItems[nIndex])
+    return CFX_FloatRect();
+
+  CFX_FloatRect rcItem = m_ListItems[nIndex]->GetRect();
+  rcItem.left = 0.0f;
+  rcItem.right = m_rcPlate.Width();
+  return InnerToOuter(rcItem);
+}
+
+void CPWL_ListCtrl::AddString(const CFX_WideString& str) {
+  AddItem(str);
+  ReArrange(GetCount() - 1);
+}
+
+void CPWL_ListCtrl::SetMultipleSelect(int32_t nItemIndex, bool bSelected) {
+  if (!IsValid(nItemIndex))
+    return;
+
+  if (bSelected != IsItemSelected(nItemIndex)) {
+    if (bSelected) {
+      SetItemSelect(nItemIndex, true);
+      InvalidateItem(nItemIndex);
+    } else {
+      SetItemSelect(nItemIndex, false);
+      InvalidateItem(nItemIndex);
+    }
+  }
+}
+
+void CPWL_ListCtrl::SetSingleSelect(int32_t nItemIndex) {
+  if (!IsValid(nItemIndex))
+    return;
+
+  if (m_nSelItem != nItemIndex) {
+    if (m_nSelItem >= 0) {
+      SetItemSelect(m_nSelItem, false);
+      InvalidateItem(m_nSelItem);
+    }
+
+    SetItemSelect(nItemIndex, true);
+    InvalidateItem(nItemIndex);
+    m_nSelItem = nItemIndex;
+  }
+}
+
+void CPWL_ListCtrl::SetCaret(int32_t nItemIndex) {
+  if (!IsValid(nItemIndex))
+    return;
+
+  if (IsMultipleSel()) {
+    int32_t nOldIndex = m_nCaretIndex;
+
+    if (nOldIndex != nItemIndex) {
+      m_nCaretIndex = nItemIndex;
+      InvalidateItem(nOldIndex);
+      InvalidateItem(nItemIndex);
+    }
+  }
+}
+
+void CPWL_ListCtrl::InvalidateItem(int32_t nItemIndex) {
+  if (m_pNotify) {
+    if (nItemIndex == -1) {
+      if (!m_bNotifyFlag) {
+        m_bNotifyFlag = true;
+        CFX_FloatRect rcRefresh = m_rcPlate;
+        m_pNotify->IOnInvalidateRect(&rcRefresh);
+        m_bNotifyFlag = false;
+      }
+    } else {
+      if (!m_bNotifyFlag) {
+        m_bNotifyFlag = true;
+        CFX_FloatRect rcRefresh = GetItemRect(nItemIndex);
+        rcRefresh.left -= 1.0f;
+        rcRefresh.right += 1.0f;
+        rcRefresh.bottom -= 1.0f;
+        rcRefresh.top += 1.0f;
+
+        m_pNotify->IOnInvalidateRect(&rcRefresh);
+        m_bNotifyFlag = false;
+      }
+    }
+  }
+}
+
+void CPWL_ListCtrl::SelectItems() {
+  for (const auto& item : m_aSelItems) {
+    if (item.second != CPLST_Select::NORMAL)
+      SetMultipleSelect(item.first, item.second == CPLST_Select::SELECTING);
+  }
+  m_aSelItems.Done();
+}
+
+void CPWL_ListCtrl::Select(int32_t nItemIndex) {
+  if (!IsValid(nItemIndex))
+    return;
+
+  if (IsMultipleSel()) {
+    m_aSelItems.Add(nItemIndex);
+    SelectItems();
+  } else {
+    SetSingleSelect(nItemIndex);
+  }
+}
+
+bool CPWL_ListCtrl::IsItemVisible(int32_t nItemIndex) const {
+  CFX_FloatRect rcPlate = m_rcPlate;
+  CFX_FloatRect rcItem = GetItemRect(nItemIndex);
+
+  return rcItem.bottom >= rcPlate.bottom && rcItem.top <= rcPlate.top;
+}
+
+void CPWL_ListCtrl::ScrollToListItem(int32_t nItemIndex) {
+  if (!IsValid(nItemIndex))
+    return;
+
+  CFX_FloatRect rcPlate = m_rcPlate;
+  CFX_FloatRect rcItem = GetItemRectInternal(nItemIndex);
+  CFX_FloatRect rcItemCtrl = GetItemRect(nItemIndex);
+
+  if (IsFloatSmaller(rcItemCtrl.bottom, rcPlate.bottom)) {
+    if (IsFloatSmaller(rcItemCtrl.top, rcPlate.top)) {
+      SetScrollPosY(rcItem.bottom + rcPlate.Height());
+    }
+  } else if (IsFloatBigger(rcItemCtrl.top, rcPlate.top)) {
+    if (IsFloatBigger(rcItemCtrl.bottom, rcPlate.bottom)) {
+      SetScrollPosY(rcItem.top);
+    }
+  }
+}
+
+void CPWL_ListCtrl::SetScrollInfo() {
+  if (m_pNotify) {
+    CFX_FloatRect rcPlate = m_rcPlate;
+    CFX_FloatRect rcContent = GetContentRectInternal();
+
+    if (!m_bNotifyFlag) {
+      m_bNotifyFlag = true;
+      m_pNotify->IOnSetScrollInfoY(rcPlate.bottom, rcPlate.top,
+                                   rcContent.bottom, rcContent.top,
+                                   GetFirstHeight(), rcPlate.Height());
+      m_bNotifyFlag = false;
+    }
+  }
+}
+
+void CPWL_ListCtrl::SetScrollPos(const CFX_PointF& point) {
+  SetScrollPosY(point.y);
+}
+
+void CPWL_ListCtrl::SetScrollPosY(float fy) {
+  if (!IsFloatEqual(m_ptScrollPos.y, fy)) {
+    CFX_FloatRect rcPlate = m_rcPlate;
+    CFX_FloatRect rcContent = GetContentRectInternal();
+
+    if (rcPlate.Height() > rcContent.Height()) {
+      fy = rcPlate.top;
+    } else {
+      if (IsFloatSmaller(fy - rcPlate.Height(), rcContent.bottom)) {
+        fy = rcContent.bottom + rcPlate.Height();
+      } else if (IsFloatBigger(fy, rcContent.top)) {
+        fy = rcContent.top;
+      }
+    }
+
+    m_ptScrollPos.y = fy;
+    InvalidateItem(-1);
+
+    if (m_pNotify) {
+      if (!m_bNotifyFlag) {
+        m_bNotifyFlag = true;
+        m_pNotify->IOnSetScrollPosY(fy);
+        m_bNotifyFlag = false;
+      }
+    }
+  }
+}
+
+CFX_FloatRect CPWL_ListCtrl::GetContentRectInternal() const {
+  return InnerToOuter(m_rcContent);
+}
+
+CFX_FloatRect CPWL_ListCtrl::GetContentRect() const {
+  return InToOut(GetContentRectInternal());
+}
+
+void CPWL_ListCtrl::ReArrange(int32_t nItemIndex) {
+  float fPosY = 0.0f;
+  if (pdfium::IndexInBounds(m_ListItems, nItemIndex - 1) &&
+      m_ListItems[nItemIndex - 1]) {
+    fPosY = m_ListItems[nItemIndex - 1]->GetRect().bottom;
+  }
+  for (const auto& pListItem : m_ListItems) {
+    if (pListItem) {
+      float fListItemHeight = pListItem->GetItemHeight();
+      pListItem->SetRect(
+          CFX_FloatRect(0.0f, fPosY + fListItemHeight, 0.0f, fPosY));
+      fPosY += fListItemHeight;
+    }
+  }
+  SetContentRect(CFX_FloatRect(0.0f, fPosY, 0.0f, 0.0f));
+  SetScrollInfo();
+}
+
+void CPWL_ListCtrl::SetTopItem(int32_t nIndex) {
+  if (IsValid(nIndex)) {
+    CFX_FloatRect rcItem = GetItemRectInternal(nIndex);
+    SetScrollPosY(rcItem.top);
+  }
+}
+
+int32_t CPWL_ListCtrl::GetTopItem() const {
+  int32_t nItemIndex = GetItemIndex(GetBTPoint());
+  if (!IsItemVisible(nItemIndex) && IsItemVisible(nItemIndex + 1))
+    nItemIndex += 1;
+
+  return nItemIndex;
+}
+
+void CPWL_ListCtrl::Empty() {
+  m_ListItems.clear();
+  InvalidateItem(-1);
+}
+
+void CPWL_ListCtrl::Cancel() {
+  m_aSelItems.DeselectAll();
+}
+
+int32_t CPWL_ListCtrl::GetItemIndex(const CFX_PointF& point) const {
+  CFX_PointF pt = OuterToInner(OutToIn(point));
+  bool bFirst = true;
+  bool bLast = true;
+  for (const auto& pListItem : m_ListItems) {
+    if (!pListItem)
+      continue;
+    CFX_FloatRect rcListItem = pListItem->GetRect();
+    if (IsFloatBigger(pt.y, rcListItem.top))
+      bFirst = false;
+    if (IsFloatSmaller(pt.y, rcListItem.bottom))
+      bLast = false;
+    if (pt.y >= rcListItem.top && pt.y < rcListItem.bottom)
+      return &pListItem - &m_ListItems.front();
+  }
+  if (bFirst)
+    return 0;
+  if (bLast)
+    return pdfium::CollectionSize<int32_t>(m_ListItems) - 1;
+  return -1;
+}
+
+CFX_WideString CPWL_ListCtrl::GetText() const {
+  if (IsMultipleSel())
+    return GetItemText(m_nCaretIndex);
+  return GetItemText(m_nSelItem);
+}
+
+void CPWL_ListCtrl::AddItem(const CFX_WideString& str) {
+  auto pListItem = pdfium::MakeUnique<Item>();
+  pListItem->SetFontMap(m_pFontMap.Get());
+  pListItem->SetFontSize(m_fFontSize);
+  pListItem->SetText(str);
+  m_ListItems.push_back(std::move(pListItem));
+}
+
+CPWL_EditImpl* CPWL_ListCtrl::GetItemEdit(int32_t nIndex) const {
+  if (!pdfium::IndexInBounds(m_ListItems, nIndex) || !m_ListItems[nIndex])
+    return nullptr;
+  return m_ListItems[nIndex]->GetEdit();
+}
+
+int32_t CPWL_ListCtrl::GetCount() const {
+  return pdfium::CollectionSize<int32_t>(m_ListItems);
+}
+
+float CPWL_ListCtrl::GetFirstHeight() const {
+  if (m_ListItems.empty() || !m_ListItems.front())
+    return 1.0f;
+  return m_ListItems.front()->GetItemHeight();
+}
+
+int32_t CPWL_ListCtrl::GetFirstSelected() const {
+  int32_t i = 0;
+  for (const auto& pListItem : m_ListItems) {
+    if (pListItem && pListItem->IsSelected())
+      return i;
+    ++i;
+  }
+  return -1;
+}
+
+int32_t CPWL_ListCtrl::GetLastSelected() const {
+  for (auto iter = m_ListItems.rbegin(); iter != m_ListItems.rend(); ++iter) {
+    if (*iter && (*iter)->IsSelected())
+      return &*iter - &m_ListItems.front();
+  }
+  return -1;
+}
+
+int32_t CPWL_ListCtrl::FindNext(int32_t nIndex, wchar_t nChar) const {
+  int32_t nCircleIndex = nIndex;
+  int32_t sz = pdfium::CollectionSize<int32_t>(m_ListItems);
+  for (int32_t i = 0; i < sz; i++) {
+    nCircleIndex++;
+    if (nCircleIndex >= sz)
+      nCircleIndex = 0;
+
+    if (Item* pListItem = m_ListItems[nCircleIndex].get()) {
+      if (FXSYS_toupper(pListItem->GetFirstChar()) == FXSYS_toupper(nChar))
+        return nCircleIndex;
+    }
+  }
+
+  return nCircleIndex;
+}
+
+bool CPWL_ListCtrl::IsItemSelected(int32_t nIndex) const {
+  return pdfium::IndexInBounds(m_ListItems, nIndex) && m_ListItems[nIndex] &&
+         m_ListItems[nIndex]->IsSelected();
+}
+
+void CPWL_ListCtrl::SetItemSelect(int32_t nIndex, bool bSelected) {
+  if (pdfium::IndexInBounds(m_ListItems, nIndex) && m_ListItems[nIndex])
+    m_ListItems[nIndex]->SetSelect(bSelected);
+}
+
+bool CPWL_ListCtrl::IsValid(int32_t nItemIndex) const {
+  return pdfium::IndexInBounds(m_ListItems, nItemIndex);
+}
+
+CFX_WideString CPWL_ListCtrl::GetItemText(int32_t nIndex) const {
+  if (pdfium::IndexInBounds(m_ListItems, nIndex) && m_ListItems[nIndex])
+    return m_ListItems[nIndex]->GetText();
+  return L"";
+}
diff --git a/fpdfsdk/pdfwindow/cpwl_list_impl.h b/fpdfsdk/pdfwindow/cpwl_list_impl.h
new file mode 100644
index 0000000000..167def057e
--- /dev/null
+++ b/fpdfsdk/pdfwindow/cpwl_list_impl.h
@@ -0,0 +1,168 @@
+// 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 FPDFSDK_PDFWINDOW_CPWL_LIST_IMPL_H_
+#define FPDFSDK_PDFWINDOW_CPWL_LIST_IMPL_H_
+
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "core/fxcrt/cfx_unowned_ptr.h"
+#include "core/fxcrt/fx_coordinates.h"
+
+class CPWL_EditImpl;
+class CPWL_EditImpl_Iterator;
+class CPWL_List_Notify;
+class IPVT_FontMap;
+
+class CPLST_Select {
+ public:
+  enum State { DESELECTING = -1, NORMAL = 0, SELECTING = 1 };
+  using const_iterator = std::map<int32_t, State>::const_iterator;
+
+  CPLST_Select();
+  virtual ~CPLST_Select();
+
+  void Add(int32_t nItemIndex);
+  void Add(int32_t nBeginIndex, int32_t nEndIndex);
+  void Sub(int32_t nItemIndex);
+  void Sub(int32_t nBeginIndex, int32_t nEndIndex);
+  void DeselectAll();
+  void Done();
+
+  const_iterator begin() const { return m_Items.begin(); }
+  const_iterator end() const { return m_Items.end(); }
+
+ private:
+  std::map<int32_t, State> m_Items;
+};
+
+class CPWL_ListCtrl {
+ public:
+  CPWL_ListCtrl();
+  ~CPWL_ListCtrl();
+
+  void SetNotify(CPWL_List_Notify* pNotify) { m_pNotify = pNotify; }
+  void OnMouseDown(const CFX_PointF& point, bool bShift, bool bCtrl);
+  void OnMouseMove(const CFX_PointF& point, bool bShift, bool bCtrl);
+  void OnVK_UP(bool bShift, bool bCtrl);
+  void OnVK_DOWN(bool bShift, bool bCtrl);
+  void OnVK_LEFT(bool bShift, bool bCtrl);
+  void OnVK_RIGHT(bool bShift, bool bCtrl);
+  void OnVK_HOME(bool bShift, bool bCtrl);
+  void OnVK_END(bool bShift, bool bCtrl);
+  bool OnChar(uint16_t nChar, bool bShift, bool bCtrl);
+
+  void SetScrollPos(const CFX_PointF& point);
+  void ScrollToListItem(int32_t nItemIndex);
+  CFX_FloatRect GetItemRect(int32_t nIndex) const;
+  int32_t GetCaret() const { return m_nCaretIndex; }
+  int32_t GetSelect() const { return m_nSelItem; }
+  int32_t GetTopItem() const;
+  void SetContentRect(const CFX_FloatRect& rect) { m_rcContent = rect; }
+  CFX_FloatRect GetContentRect() const;
+
+  int32_t GetItemIndex(const CFX_PointF& point) const;
+  void AddString(const CFX_WideString& str);
+  void SetTopItem(int32_t nIndex);
+  void Select(int32_t nItemIndex);
+  void SetCaret(int32_t nItemIndex);
+  void Empty();
+  void Cancel();
+  CFX_WideString GetText() const;
+
+  void SetFontMap(IPVT_FontMap* pFontMap) { m_pFontMap = pFontMap; }
+  void SetFontSize(float fFontSize) { m_fFontSize = fFontSize; }
+  CFX_FloatRect GetPlateRect() const { return m_rcPlate; }
+  void SetPlateRect(const CFX_FloatRect& rect);
+
+  float GetFontSize() const { return m_fFontSize; }
+  CPWL_EditImpl* GetItemEdit(int32_t nIndex) const;
+  int32_t GetCount() const;
+  bool IsItemSelected(int32_t nIndex) const;
+  float GetFirstHeight() const;
+  void SetMultipleSel(bool bMultiple) { m_bMultiple = bMultiple; }
+  bool IsMultipleSel() const { return m_bMultiple; }
+  int32_t FindNext(int32_t nIndex, wchar_t nChar) const;
+  int32_t GetFirstSelected() const;
+
+ private:
+  class Item {
+   public:
+    Item();
+    ~Item();
+
+    void SetFontMap(IPVT_FontMap* pFontMap);
+    CPWL_EditImpl* GetEdit() const { return m_pEdit.get(); }
+
+    void SetRect(const CFX_FloatRect& rect) { m_rcListItem = rect; }
+    void SetSelect(bool bSelected) { m_bSelected = bSelected; }
+    void SetText(const CFX_WideString& text);
+    void SetFontSize(float fFontSize);
+    CFX_WideString GetText() const;
+
+    CFX_FloatRect GetRect() const { return m_rcListItem; }
+    bool IsSelected() const { return m_bSelected; }
+    float GetItemHeight() const;
+    uint16_t GetFirstChar() const;
+
+   private:
+    CPWL_EditImpl_Iterator* GetIterator() const;
+
+    std::unique_ptr<CPWL_EditImpl> m_pEdit;
+    bool m_bSelected;
+    CFX_FloatRect m_rcListItem;
+  };
+
+  CFX_PointF InToOut(const CFX_PointF& point) const;
+  CFX_PointF OutToIn(const CFX_PointF& point) const;
+  CFX_FloatRect InToOut(const CFX_FloatRect& rect) const;
+  CFX_FloatRect OutToIn(const CFX_FloatRect& rect) const;
+
+  CFX_PointF InnerToOuter(const CFX_PointF& point) const;
+  CFX_PointF OuterToInner(const CFX_PointF& point) const;
+  CFX_FloatRect InnerToOuter(const CFX_FloatRect& rect) const;
+  CFX_FloatRect OuterToInner(const CFX_FloatRect& rect) const;
+
+  void OnVK(int32_t nItemIndex, bool bShift, bool bCtrl);
+  bool IsValid(int32_t nItemIndex) const;
+
+  void ReArrange(int32_t nItemIndex);
+  CFX_FloatRect GetItemRectInternal(int32_t nIndex) const;
+  CFX_FloatRect GetContentRectInternal() const;
+  void SetMultipleSelect(int32_t nItemIndex, bool bSelected);
+  void SetSingleSelect(int32_t nItemIndex);
+  void InvalidateItem(int32_t nItemIndex);
+  void SelectItems();
+  bool IsItemVisible(int32_t nItemIndex) const;
+  void SetScrollInfo();
+  void SetScrollPosY(float fy);
+  void AddItem(const CFX_WideString& str);
+  CFX_WideString GetItemText(int32_t nIndex) const;
+  void SetItemSelect(int32_t nItemIndex, bool bSelected);
+  int32_t GetLastSelected() const;
+  CFX_PointF GetBTPoint() const {
+    return CFX_PointF(m_rcPlate.left, m_rcPlate.top);
+  }
+
+  CFX_FloatRect m_rcPlate;
+  CFX_FloatRect m_rcContent;
+  CFX_UnownedPtr<CPWL_List_Notify> m_pNotify;
+  bool m_bNotifyFlag;
+  CFX_PointF m_ptScrollPos;
+  CPLST_Select m_aSelItems;  // for multiple
+  int32_t m_nSelItem;        // for single
+  int32_t m_nFootIndex;      // for multiple
+  bool m_bCtrlSel;           // for multiple
+  int32_t m_nCaretIndex;     // for multiple
+  std::vector<std::unique_ptr<Item>> m_ListItems;
+  float m_fFontSize;
+  CFX_UnownedPtr<IPVT_FontMap> m_pFontMap;
+  bool m_bMultiple;
+};
+
+#endif  // FPDFSDK_PDFWINDOW_CPWL_LIST_IMPL_H_