Move xfa/fxfa/app to xfa/fxfachromium/3166

There currently exists a weird split where some files exist in xfa/fxfa
and some files exist in xfa/fxfa/app. This CL removes the app/ folder
and moves all files up to the parent directory.

Change-Id: I00c87851a1ebc5a7a636eb9a17b58ba3f1708a84
Reviewed-on: https://pdfium-review.googlesource.com/8810
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

1 files changed, 625 insertions, 0 deletions

diff --git a/xfa/fxfa/cxfa_textparser.cpp b/xfa/fxfa/cxfa_textparser.cpp
new file mode 100644
index 0000000000..2bc0096962
--- /dev/null
+++ b/xfa/fxfa/cxfa_textparser.cpp
@@ -0,0 +1,625 @@
+// Copyright 2017 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 "xfa/fxfa/cxfa_textparser.h"
+
+#include <algorithm>
+#include <utility>
+#include <vector>
+
+#include "core/fxcrt/fx_codepage.h"
+#include "core/fxcrt/xml/cfx_xmlelement.h"
+#include "core/fxcrt/xml/cfx_xmlnode.h"
+#include "third_party/base/ptr_util.h"
+#include "xfa/fde/css/cfde_csscomputedstyle.h"
+#include "xfa/fde/css/cfde_cssstyleselector.h"
+#include "xfa/fde/css/cfde_cssstylesheet.h"
+#include "xfa/fde/css/fde_css.h"
+#include "xfa/fgas/font/cfgas_fontmgr.h"
+#include "xfa/fxfa/cxfa_csstagprovider.h"
+#include "xfa/fxfa/cxfa_ffapp.h"
+#include "xfa/fxfa/cxfa_ffdoc.h"
+#include "xfa/fxfa/cxfa_fontmgr.h"
+#include "xfa/fxfa/cxfa_textparsecontext.h"
+#include "xfa/fxfa/cxfa_textprovider.h"
+#include "xfa/fxfa/cxfa_texttabstopscontext.h"
+#include "xfa/fxfa/parser/cxfa_measurement.h"
+
+namespace {
+
+enum class TabStopStatus {
+  Error,
+  EOS,
+  None,
+  Alignment,
+  StartLeader,
+  Leader,
+  Location,
+};
+
+}  // namespace
+
+CXFA_TextParser::CXFA_TextParser()
+    : m_bParsed(false), m_cssInitialized(false) {}
+
+CXFA_TextParser::~CXFA_TextParser() {}
+
+void CXFA_TextParser::Reset() {
+  m_mapXMLNodeToParseContext.clear();
+  m_bParsed = false;
+}
+
+void CXFA_TextParser::InitCSSData(CXFA_TextProvider* pTextProvider) {
+  if (!pTextProvider)
+    return;
+
+  if (!m_pSelector) {
+    CXFA_FFDoc* pDoc = pTextProvider->GetDocNode();
+    CFGAS_FontMgr* pFontMgr = pDoc->GetApp()->GetFDEFontMgr();
+    ASSERT(pFontMgr);
+    m_pSelector = pdfium::MakeUnique<CFDE_CSSStyleSelector>(pFontMgr);
+    CXFA_Font font = pTextProvider->GetFontNode();
+    m_pSelector->SetDefFontSize(font ? font.GetFontSize() : 10.0f);
+  }
+
+  if (m_cssInitialized)
+    return;
+
+  m_cssInitialized = true;
+  auto uaSheet = LoadDefaultSheetStyle();
+  m_pSelector->SetUAStyleSheet(std::move(uaSheet));
+  m_pSelector->UpdateStyleIndex();
+}
+
+std::unique_ptr<CFDE_CSSStyleSheet> CXFA_TextParser::LoadDefaultSheetStyle() {
+  static const wchar_t s_pStyle[] =
+      L"html,body,ol,p,ul{display:block}"
+      L"li{display:list-item}"
+      L"ol,ul{padding-left:33px;margin:1.12em 0}"
+      L"ol{list-style-type:decimal}"
+      L"a{color:#0000ff;text-decoration:underline}"
+      L"b{font-weight:bolder}"
+      L"i{font-style:italic}"
+      L"sup{vertical-align:+15em;font-size:.66em}"
+      L"sub{vertical-align:-15em;font-size:.66em}";
+
+  auto sheet = pdfium::MakeUnique<CFDE_CSSStyleSheet>();
+  return sheet->LoadBuffer(s_pStyle, FXSYS_wcslen(s_pStyle)) ? std::move(sheet)
+                                                             : nullptr;
+}
+
+CFX_RetainPtr<CFDE_CSSComputedStyle> CXFA_TextParser::CreateRootStyle(
+    CXFA_TextProvider* pTextProvider) {
+  CXFA_Font font = pTextProvider->GetFontNode();
+  CXFA_Para para = pTextProvider->GetParaNode();
+  auto pStyle = m_pSelector->CreateComputedStyle(nullptr);
+  float fLineHeight = 0;
+  float fFontSize = 10;
+
+  if (para) {
+    fLineHeight = para.GetLineHeight();
+    FDE_CSSLength indent;
+    indent.Set(FDE_CSSLengthUnit::Point, para.GetTextIndent());
+    pStyle->SetTextIndent(indent);
+    FDE_CSSTextAlign hAlign = FDE_CSSTextAlign::Left;
+    switch (para.GetHorizontalAlign()) {
+      case XFA_ATTRIBUTEENUM_Center:
+        hAlign = FDE_CSSTextAlign::Center;
+        break;
+      case XFA_ATTRIBUTEENUM_Right:
+        hAlign = FDE_CSSTextAlign::Right;
+        break;
+      case XFA_ATTRIBUTEENUM_Justify:
+        hAlign = FDE_CSSTextAlign::Justify;
+        break;
+      case XFA_ATTRIBUTEENUM_JustifyAll:
+        hAlign = FDE_CSSTextAlign::JustifyAll;
+        break;
+    }
+    pStyle->SetTextAlign(hAlign);
+    FDE_CSSRect rtMarginWidth;
+    rtMarginWidth.left.Set(FDE_CSSLengthUnit::Point, para.GetMarginLeft());
+    rtMarginWidth.top.Set(FDE_CSSLengthUnit::Point, para.GetSpaceAbove());
+    rtMarginWidth.right.Set(FDE_CSSLengthUnit::Point, para.GetMarginRight());
+    rtMarginWidth.bottom.Set(FDE_CSSLengthUnit::Point, para.GetSpaceBelow());
+    pStyle->SetMarginWidth(rtMarginWidth);
+  }
+
+  if (font) {
+    pStyle->SetColor(font.GetColor());
+    pStyle->SetFontStyle(font.IsItalic() ? FDE_CSSFontStyle::Italic
+                                         : FDE_CSSFontStyle::Normal);
+    pStyle->SetFontWeight(font.IsBold() ? FXFONT_FW_BOLD : FXFONT_FW_NORMAL);
+    pStyle->SetNumberVerticalAlign(-font.GetBaselineShift());
+    fFontSize = font.GetFontSize();
+    FDE_CSSLength letterSpacing;
+    letterSpacing.Set(FDE_CSSLengthUnit::Point, font.GetLetterSpacing());
+    pStyle->SetLetterSpacing(letterSpacing);
+    uint32_t dwDecoration = 0;
+    if (font.GetLineThrough() > 0)
+      dwDecoration |= FDE_CSSTEXTDECORATION_LineThrough;
+    if (font.GetUnderline() > 1)
+      dwDecoration |= FDE_CSSTEXTDECORATION_Double;
+    else if (font.GetUnderline() > 0)
+      dwDecoration |= FDE_CSSTEXTDECORATION_Underline;
+
+    pStyle->SetTextDecoration(dwDecoration);
+  }
+  pStyle->SetLineHeight(fLineHeight);
+  pStyle->SetFontSize(fFontSize);
+  return pStyle;
+}
+
+CFX_RetainPtr<CFDE_CSSComputedStyle> CXFA_TextParser::CreateStyle(
+    CFDE_CSSComputedStyle* pParentStyle) {
+  auto pNewStyle = m_pSelector->CreateComputedStyle(pParentStyle);
+  ASSERT(pNewStyle);
+  if (!pParentStyle)
+    return pNewStyle;
+
+  uint32_t dwDecoration = pParentStyle->GetTextDecoration();
+  float fBaseLine = 0;
+  if (pParentStyle->GetVerticalAlign() == FDE_CSSVerticalAlign::Number)
+    fBaseLine = pParentStyle->GetNumberVerticalAlign();
+
+  pNewStyle->SetTextDecoration(dwDecoration);
+  pNewStyle->SetNumberVerticalAlign(fBaseLine);
+
+  const FDE_CSSRect* pRect = pParentStyle->GetMarginWidth();
+  if (pRect)
+    pNewStyle->SetMarginWidth(*pRect);
+  return pNewStyle;
+}
+
+CFX_RetainPtr<CFDE_CSSComputedStyle> CXFA_TextParser::ComputeStyle(
+    CFX_XMLNode* pXMLNode,
+    CFDE_CSSComputedStyle* pParentStyle) {
+  auto it = m_mapXMLNodeToParseContext.find(pXMLNode);
+  if (it == m_mapXMLNodeToParseContext.end())
+    return nullptr;
+
+  CXFA_TextParseContext* pContext = it->second.get();
+  if (!pContext)
+    return nullptr;
+
+  pContext->m_pParentStyle.Reset(pParentStyle);
+
+  auto tagProvider = ParseTagInfo(pXMLNode);
+  if (tagProvider->m_bContent)
+    return nullptr;
+
+  auto pStyle = CreateStyle(pParentStyle);
+  m_pSelector->ComputeStyle(pContext->GetDecls(),
+                            tagProvider->GetAttribute(L"style"),
+                            tagProvider->GetAttribute(L"align"), pStyle.Get());
+  return pStyle;
+}
+
+void CXFA_TextParser::DoParse(CFX_XMLNode* pXMLContainer,
+                              CXFA_TextProvider* pTextProvider) {
+  if (!pXMLContainer || !pTextProvider || m_bParsed)
+    return;
+
+  m_bParsed = true;
+  InitCSSData(pTextProvider);
+  auto pRootStyle = CreateRootStyle(pTextProvider);
+  ParseRichText(pXMLContainer, pRootStyle.Get());
+}
+
+void CXFA_TextParser::ParseRichText(CFX_XMLNode* pXMLNode,
+                                    CFDE_CSSComputedStyle* pParentStyle) {
+  if (!pXMLNode)
+    return;
+
+  auto tagProvider = ParseTagInfo(pXMLNode);
+  if (!tagProvider->m_bTagAvailable)
+    return;
+
+  CFX_RetainPtr<CFDE_CSSComputedStyle> pNewStyle;
+  if ((tagProvider->GetTagName() != L"body") ||
+      (tagProvider->GetTagName() != L"html")) {
+    auto pTextContext = pdfium::MakeUnique<CXFA_TextParseContext>();
+    FDE_CSSDisplay eDisplay = FDE_CSSDisplay::Inline;
+    if (!tagProvider->m_bContent) {
+      auto declArray =
+          m_pSelector->MatchDeclarations(tagProvider->GetTagName());
+      pNewStyle = CreateStyle(pParentStyle);
+      m_pSelector->ComputeStyle(declArray, tagProvider->GetAttribute(L"style"),
+                                tagProvider->GetAttribute(L"align"),
+                                pNewStyle.Get());
+
+      if (!declArray.empty())
+        pTextContext->SetDecls(std::move(declArray));
+
+      eDisplay = pNewStyle->GetDisplay();
+    }
+    pTextContext->SetDisplay(eDisplay);
+    m_mapXMLNodeToParseContext[pXMLNode] = std::move(pTextContext);
+  }
+
+  for (CFX_XMLNode* pXMLChild = pXMLNode->GetNodeItem(CFX_XMLNode::FirstChild);
+       pXMLChild;
+       pXMLChild = pXMLChild->GetNodeItem(CFX_XMLNode::NextSibling)) {
+    ParseRichText(pXMLChild, pNewStyle.Get());
+  }
+}
+
+bool CXFA_TextParser::TagValidate(const CFX_WideString& wsName) const {
+  static const uint32_t s_XFATagName[] = {
+      0x61,        // a
+      0x62,        // b
+      0x69,        // i
+      0x70,        // p
+      0x0001f714,  // br
+      0x00022a55,  // li
+      0x000239bb,  // ol
+      0x00025881,  // ul
+      0x0bd37faa,  // sub
+      0x0bd37fb8,  // sup
+      0xa73e3af2,  // span
+      0xb182eaae,  // body
+      0xdb8ac455,  // html
+  };
+  static const int32_t s_iCount = FX_ArraySize(s_XFATagName);
+
+  return std::binary_search(s_XFATagName, s_XFATagName + s_iCount,
+                            FX_HashCode_GetW(wsName.AsStringC(), true));
+}
+
+std::unique_ptr<CXFA_CSSTagProvider> CXFA_TextParser::ParseTagInfo(
+    CFX_XMLNode* pXMLNode) {
+  auto tagProvider = pdfium::MakeUnique<CXFA_CSSTagProvider>();
+
+  CFX_WideString wsName;
+  if (pXMLNode->GetType() == FX_XMLNODE_Element) {
+    CFX_XMLElement* pXMLElement = static_cast<CFX_XMLElement*>(pXMLNode);
+    wsName = pXMLElement->GetLocalTagName();
+    tagProvider->SetTagName(wsName);
+    tagProvider->m_bTagAvailable = TagValidate(wsName);
+
+    CFX_WideString wsValue = pXMLElement->GetString(L"style");
+    if (!wsValue.IsEmpty())
+      tagProvider->SetAttribute(L"style", wsValue);
+  } else if (pXMLNode->GetType() == FX_XMLNODE_Text) {
+    tagProvider->m_bTagAvailable = true;
+    tagProvider->m_bContent = true;
+  }
+  return tagProvider;
+}
+
+int32_t CXFA_TextParser::GetVAlign(CXFA_TextProvider* pTextProvider) const {
+  CXFA_Para para = pTextProvider->GetParaNode();
+  return para ? para.GetVerticalAlign() : XFA_ATTRIBUTEENUM_Top;
+}
+
+float CXFA_TextParser::GetTabInterval(CFDE_CSSComputedStyle* pStyle) const {
+  CFX_WideString wsValue;
+  if (pStyle && pStyle->GetCustomStyle(L"tab-interval", wsValue))
+    return CXFA_Measurement(wsValue.AsStringC()).ToUnit(XFA_UNIT_Pt);
+  return 36;
+}
+
+int32_t CXFA_TextParser::CountTabs(CFDE_CSSComputedStyle* pStyle) const {
+  CFX_WideString wsValue;
+  if (pStyle && pStyle->GetCustomStyle(L"xfa-tab-count", wsValue))
+    return wsValue.GetInteger();
+  return 0;
+}
+
+bool CXFA_TextParser::IsSpaceRun(CFDE_CSSComputedStyle* pStyle) const {
+  CFX_WideString wsValue;
+  if (pStyle && pStyle->GetCustomStyle(L"xfa-spacerun", wsValue)) {
+    wsValue.MakeLower();
+    return wsValue == L"yes";
+  }
+  return false;
+}
+
+CFX_RetainPtr<CFGAS_GEFont> CXFA_TextParser::GetFont(
+    CXFA_TextProvider* pTextProvider,
+    CFDE_CSSComputedStyle* pStyle) const {
+  CFX_WideStringC wsFamily = L"Courier";
+  uint32_t dwStyle = 0;
+  CXFA_Font font = pTextProvider->GetFontNode();
+  if (font) {
+    font.GetTypeface(wsFamily);
+    if (font.IsBold())
+      dwStyle |= FX_FONTSTYLE_Bold;
+    if (font.IsItalic())
+      dwStyle |= FX_FONTSTYLE_Italic;
+  }
+
+  if (pStyle) {
+    int32_t iCount = pStyle->CountFontFamilies();
+    if (iCount > 0)
+      wsFamily = pStyle->GetFontFamily(iCount - 1).AsStringC();
+
+    dwStyle = 0;
+    if (pStyle->GetFontWeight() > FXFONT_FW_NORMAL)
+      dwStyle |= FX_FONTSTYLE_Bold;
+    if (pStyle->GetFontStyle() == FDE_CSSFontStyle::Italic)
+      dwStyle |= FX_FONTSTYLE_Italic;
+  }
+
+  CXFA_FFDoc* pDoc = pTextProvider->GetDocNode();
+  CXFA_FontMgr* pFontMgr = pDoc->GetApp()->GetXFAFontMgr();
+  return pFontMgr->GetFont(pDoc, wsFamily, dwStyle);
+}
+
+float CXFA_TextParser::GetFontSize(CXFA_TextProvider* pTextProvider,
+                                   CFDE_CSSComputedStyle* pStyle) const {
+  if (pStyle)
+    return pStyle->GetFontSize();
+
+  CXFA_Font font = pTextProvider->GetFontNode();
+  if (font)
+    return font.GetFontSize();
+  return 10;
+}
+
+int32_t CXFA_TextParser::GetHorScale(CXFA_TextProvider* pTextProvider,
+                                     CFDE_CSSComputedStyle* pStyle,
+                                     CFX_XMLNode* pXMLNode) const {
+  if (pStyle) {
+    CFX_WideString wsValue;
+    if (pStyle->GetCustomStyle(L"xfa-font-horizontal-scale", wsValue))
+      return wsValue.GetInteger();
+
+    while (pXMLNode) {
+      auto it = m_mapXMLNodeToParseContext.find(pXMLNode);
+      if (it != m_mapXMLNodeToParseContext.end()) {
+        CXFA_TextParseContext* pContext = it->second.get();
+        if (pContext && pContext->m_pParentStyle &&
+            pContext->m_pParentStyle->GetCustomStyle(
+                L"xfa-font-horizontal-scale", wsValue)) {
+          return wsValue.GetInteger();
+        }
+      }
+      pXMLNode = pXMLNode->GetNodeItem(CFX_XMLNode::Parent);
+    }
+  }
+
+  if (CXFA_Font font = pTextProvider->GetFontNode())
+    return static_cast<int32_t>(font.GetHorizontalScale());
+  return 100;
+}
+
+int32_t CXFA_TextParser::GetVerScale(CXFA_TextProvider* pTextProvider,
+                                     CFDE_CSSComputedStyle* pStyle) const {
+  if (pStyle) {
+    CFX_WideString wsValue;
+    if (pStyle->GetCustomStyle(L"xfa-font-vertical-scale", wsValue))
+      return wsValue.GetInteger();
+  }
+
+  if (CXFA_Font font = pTextProvider->GetFontNode())
+    return (int32_t)font.GetVerticalScale();
+  return 100;
+}
+
+void CXFA_TextParser::GetUnderline(CXFA_TextProvider* pTextProvider,
+                                   CFDE_CSSComputedStyle* pStyle,
+                                   int32_t& iUnderline,
+                                   int32_t& iPeriod) const {
+  iUnderline = 0;
+  iPeriod = XFA_ATTRIBUTEENUM_All;
+  if (!pStyle) {
+    CXFA_Font font = pTextProvider->GetFontNode();
+    if (font) {
+      iUnderline = font.GetUnderline();
+      iPeriod = font.GetUnderlinePeriod();
+    }
+    return;
+  }
+
+  uint32_t dwDecoration = pStyle->GetTextDecoration();
+  if (dwDecoration & FDE_CSSTEXTDECORATION_Double)
+    iUnderline = 2;
+  else if (dwDecoration & FDE_CSSTEXTDECORATION_Underline)
+    iUnderline = 1;
+
+  CFX_WideString wsValue;
+  if (pStyle->GetCustomStyle(L"underlinePeriod", wsValue)) {
+    if (wsValue == L"word")
+      iPeriod = XFA_ATTRIBUTEENUM_Word;
+  } else if (CXFA_Font font = pTextProvider->GetFontNode()) {
+    iPeriod = font.GetUnderlinePeriod();
+  }
+}
+
+void CXFA_TextParser::GetLinethrough(CXFA_TextProvider* pTextProvider,
+                                     CFDE_CSSComputedStyle* pStyle,
+                                     int32_t& iLinethrough) const {
+  if (pStyle) {
+    uint32_t dwDecoration = pStyle->GetTextDecoration();
+    iLinethrough = (dwDecoration & FDE_CSSTEXTDECORATION_LineThrough) ? 1 : 0;
+    return;
+  }
+
+  CXFA_Font font = pTextProvider->GetFontNode();
+  if (font)
+    iLinethrough = font.GetLineThrough();
+}
+
+FX_ARGB CXFA_TextParser::GetColor(CXFA_TextProvider* pTextProvider,
+                                  CFDE_CSSComputedStyle* pStyle) const {
+  if (pStyle)
+    return pStyle->GetColor();
+  if (CXFA_Font font = pTextProvider->GetFontNode())
+    return font.GetColor();
+
+  return 0xFF000000;
+}
+
+float CXFA_TextParser::GetBaseline(CXFA_TextProvider* pTextProvider,
+                                   CFDE_CSSComputedStyle* pStyle) const {
+  if (pStyle) {
+    if (pStyle->GetVerticalAlign() == FDE_CSSVerticalAlign::Number)
+      return pStyle->GetNumberVerticalAlign();
+  } else if (CXFA_Font font = pTextProvider->GetFontNode()) {
+    return font.GetBaselineShift();
+  }
+  return 0;
+}
+
+float CXFA_TextParser::GetLineHeight(CXFA_TextProvider* pTextProvider,
+                                     CFDE_CSSComputedStyle* pStyle,
+                                     bool bFirst,
+                                     float fVerScale) const {
+  float fLineHeight = 0;
+  if (pStyle)
+    fLineHeight = pStyle->GetLineHeight();
+  else if (CXFA_Para para = pTextProvider->GetParaNode())
+    fLineHeight = para.GetLineHeight();
+
+  if (bFirst) {
+    float fFontSize = GetFontSize(pTextProvider, pStyle);
+    if (fLineHeight < 0.1f)
+      fLineHeight = fFontSize;
+    else
+      fLineHeight = std::min(fLineHeight, fFontSize);
+  } else if (fLineHeight < 0.1f) {
+    fLineHeight = GetFontSize(pTextProvider, pStyle) * 1.2f;
+  }
+  fLineHeight *= fVerScale;
+  return fLineHeight;
+}
+
+bool CXFA_TextParser::GetEmbbedObj(CXFA_TextProvider* pTextProvider,
+                                   CFX_XMLNode* pXMLNode,
+                                   CFX_WideString& wsValue) {
+  wsValue.clear();
+  if (!pXMLNode)
+    return false;
+
+  bool bRet = false;
+  if (pXMLNode->GetType() == FX_XMLNODE_Element) {
+    CFX_XMLElement* pElement = static_cast<CFX_XMLElement*>(pXMLNode);
+    CFX_WideString wsAttr = pElement->GetString(L"xfa:embed");
+    if (wsAttr.IsEmpty())
+      return false;
+    if (wsAttr.GetAt(0) == L'#')
+      wsAttr.Delete(0);
+
+    CFX_WideString ws = pElement->GetString(L"xfa:embedType");
+    if (ws.IsEmpty())
+      ws = L"som";
+    else
+      ws.MakeLower();
+
+    bool bURI = (ws == L"uri");
+    if (!bURI && ws != L"som")
+      return false;
+
+    ws = pElement->GetString(L"xfa:embedMode");
+    if (ws.IsEmpty())
+      ws = L"formatted";
+    else
+      ws.MakeLower();
+
+    bool bRaw = (ws == L"raw");
+    if (!bRaw && ws != L"formatted")
+      return false;
+
+    bRet = pTextProvider->GetEmbbedObj(bURI, bRaw, wsAttr, wsValue);
+  }
+  return bRet;
+}
+
+CXFA_TextParseContext* CXFA_TextParser::GetParseContextFromMap(
+    CFX_XMLNode* pXMLNode) {
+  auto it = m_mapXMLNodeToParseContext.find(pXMLNode);
+  return it != m_mapXMLNodeToParseContext.end() ? it->second.get() : nullptr;
+}
+
+bool CXFA_TextParser::GetTabstops(CFDE_CSSComputedStyle* pStyle,
+                                  CXFA_TextTabstopsContext* pTabstopContext) {
+  if (!pStyle || !pTabstopContext)
+    return false;
+
+  CFX_WideString wsValue;
+  if (!pStyle->GetCustomStyle(L"xfa-tab-stops", wsValue) &&
+      !pStyle->GetCustomStyle(L"tab-stops", wsValue)) {
+    return false;
+  }
+
+  int32_t iLength = wsValue.GetLength();
+  const wchar_t* pTabStops = wsValue.c_str();
+  int32_t iCur = 0;
+  int32_t iLast = 0;
+  CFX_WideString wsAlign;
+  TabStopStatus eStatus = TabStopStatus::None;
+  wchar_t ch;
+  while (iCur < iLength) {
+    ch = pTabStops[iCur];
+    switch (eStatus) {
+      case TabStopStatus::None:
+        if (ch <= ' ') {
+          iCur++;
+        } else {
+          eStatus = TabStopStatus::Alignment;
+          iLast = iCur;
+        }
+        break;
+      case TabStopStatus::Alignment:
+        if (ch == ' ') {
+          wsAlign = CFX_WideStringC(pTabStops + iLast, iCur - iLast);
+          eStatus = TabStopStatus::StartLeader;
+          iCur++;
+          while (iCur < iLength && pTabStops[iCur] <= ' ')
+            iCur++;
+          iLast = iCur;
+        } else {
+          iCur++;
+        }
+        break;
+      case TabStopStatus::StartLeader:
+        if (ch != 'l') {
+          eStatus = TabStopStatus::Location;
+        } else {
+          int32_t iCount = 0;
+          while (iCur < iLength) {
+            ch = pTabStops[iCur];
+            iCur++;
+            if (ch == '(') {
+              iCount++;
+            } else if (ch == ')') {
+              iCount--;
+              if (iCount == 0)
+                break;
+            }
+          }
+          while (iCur < iLength && pTabStops[iCur] <= ' ')
+            iCur++;
+
+          iLast = iCur;
+          eStatus = TabStopStatus::Location;
+        }
+        break;
+      case TabStopStatus::Location:
+        if (ch == ' ') {
+          uint32_t dwHashCode = FX_HashCode_GetW(wsAlign.AsStringC(), true);
+          CXFA_Measurement ms(CFX_WideStringC(pTabStops + iLast, iCur - iLast));
+          float fPos = ms.ToUnit(XFA_UNIT_Pt);
+          pTabstopContext->Append(dwHashCode, fPos);
+          wsAlign.clear();
+          eStatus = TabStopStatus::None;
+        }
+        iCur++;
+        break;
+      default:
+        break;
+    }
+  }
+
+  if (!wsAlign.IsEmpty()) {
+    uint32_t dwHashCode = FX_HashCode_GetW(wsAlign.AsStringC(), true);
+    CXFA_Measurement ms(CFX_WideStringC(pTabStops + iLast, iCur - iLast));
+    float fPos = ms.ToUnit(XFA_UNIT_Pt);
+    pTabstopContext->Append(dwHashCode, fPos);
+  }
+  return true;
+}