Clean up CFGAS_GEFont

Removed some unused method, named files properly, cleaned up a bit.

Review-Url: https://codereview.chromium.org/2524493002

1 files changed, 461 insertions, 0 deletions

diff --git a/xfa/fgas/font/cfgas_gefont.cpp b/xfa/fgas/font/cfgas_gefont.cpp
new file mode 100644
index 0000000000..ffe791aab5
--- /dev/null
+++ b/xfa/fgas/font/cfgas_gefont.cpp
@@ -0,0 +1,461 @@
+// 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 "xfa/fgas/font/cfgas_gefont.h"
+
+#include <memory>
+#include <utility>
+
+#include "core/fxge/cfx_substfont.h"
+#include "core/fxge/cfx_unicodeencoding.h"
+#include "core/fxge/cfx_unicodeencodingex.h"
+#include "third_party/base/ptr_util.h"
+#include "xfa/fgas/crt/fgas_codepage.h"
+#include "xfa/fgas/font/fgas_fontutils.h"
+#include "xfa/fxfa/xfa_fontmgr.h"
+
+// static
+CFGAS_GEFont* CFGAS_GEFont::LoadFont(const FX_WCHAR* pszFontFamily,
+                                     uint32_t dwFontStyles,
+                                     uint16_t wCodePage,
+                                     CFGAS_FontMgr* pFontMgr) {
+#if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_
+  if (pFontMgr)
+    return pFontMgr->GetFontByCodePage(wCodePage, dwFontStyles, pszFontFamily);
+  return nullptr;
+#else
+  CFGAS_GEFont* pFont = new CFGAS_GEFont(pFontMgr);
+  if (!pFont->LoadFontInternal(pszFontFamily, dwFontStyles, wCodePage)) {
+    pFont->Release();
+    return nullptr;
+  }
+  return pFont;
+#endif
+}
+
+// static
+CFGAS_GEFont* CFGAS_GEFont::LoadFont(CFX_Font* pExternalFont,
+                                     CFGAS_FontMgr* pFontMgr) {
+  CFGAS_GEFont* pFont = new CFGAS_GEFont(pFontMgr);
+  if (!pFont->LoadFontInternal(pExternalFont)) {
+    pFont->Release();
+    return nullptr;
+  }
+  return pFont;
+}
+
+// static
+CFGAS_GEFont* CFGAS_GEFont::LoadFont(std::unique_ptr<CFX_Font> pInternalFont,
+                                     CFGAS_FontMgr* pFontMgr) {
+  CFGAS_GEFont* pFont = new CFGAS_GEFont(pFontMgr);
+  if (!pFont->LoadFontInternal(std::move(pInternalFont))) {
+    pFont->Release();
+    return nullptr;
+  }
+  return pFont;
+}
+
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+// static
+CFGAS_GEFont* CFGAS_GEFont::LoadFont(const uint8_t* pBuffer,
+                                     int32_t iLength,
+                                     CFGAS_FontMgr* pFontMgr) {
+  CFGAS_GEFont* pFont = new CFGAS_GEFont(pFontMgr);
+  if (!pFont->LoadFontInternal(pBuffer, iLength)) {
+    pFont->Release();
+    return nullptr;
+  }
+  return pFont;
+}
+
+// static
+CFGAS_GEFont* CFGAS_GEFont::LoadFont(IFX_Stream* pFontStream,
+                                     CFGAS_FontMgr* pFontMgr,
+                                     bool bSaveStream) {
+  CFGAS_GEFont* pFont = new CFGAS_GEFont(pFontMgr);
+  if (!pFont->LoadFontInternal(pFontStream, bSaveStream)) {
+    pFont->Release();
+    return nullptr;
+  }
+  return pFont;
+}
+#endif  // _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+
+CFGAS_GEFont::CFGAS_GEFont(CFGAS_FontMgr* pFontMgr)
+    :
+#if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_
+      m_bUseLogFontStyle(false),
+      m_dwLogFontStyle(0),
+#endif
+      m_pFont(nullptr),
+      m_pSrcFont(nullptr),
+      m_pFontMgr(pFontMgr),
+      m_iRefCount(1),
+      m_bExternalFont(false),
+      m_pProvider(nullptr) {
+}
+
+CFGAS_GEFont::CFGAS_GEFont(CFGAS_GEFont* src, uint32_t dwFontStyles)
+    :
+#if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_
+      m_bUseLogFontStyle(false),
+      m_dwLogFontStyle(0),
+#endif
+      m_pFont(nullptr),
+      m_pSrcFont(src),
+      m_pFontMgr(src->m_pFontMgr),
+      m_iRefCount(1),
+      m_bExternalFont(false),
+      m_pProvider(nullptr) {
+  ASSERT(m_pSrcFont->m_pFont);
+  m_pSrcFont->Retain();
+  m_pFont = new CFX_Font;
+  m_pFont->LoadClone(m_pSrcFont->m_pFont);
+  CFX_SubstFont* pSubst = m_pFont->GetSubstFont();
+  if (!pSubst) {
+    pSubst = new CFX_SubstFont;
+    m_pFont->SetSubstFont(std::unique_ptr<CFX_SubstFont>(pSubst));
+  }
+  pSubst->m_Weight =
+      (dwFontStyles & FX_FONTSTYLE_Bold) ? FXFONT_FW_BOLD : FXFONT_FW_NORMAL;
+  if (dwFontStyles & FX_FONTSTYLE_Italic)
+    pSubst->m_SubstFlags |= FXFONT_SUBST_ITALIC;
+  InitFont();
+}
+
+CFGAS_GEFont::~CFGAS_GEFont() {
+  for (int32_t i = 0; i < m_SubstFonts.GetSize(); i++)
+    m_SubstFonts[i]->Release();
+
+  m_SubstFonts.RemoveAll();
+  m_FontMapper.clear();
+
+  if (!m_bExternalFont)
+    delete m_pFont;
+
+  // If it is a shallow copy of another source font,
+  // decrease the refcount of the source font.
+  if (m_pSrcFont)
+    m_pSrcFont->Release();
+}
+
+void CFGAS_GEFont::Release() {
+  if (--m_iRefCount < 1) {
+    if (m_pFontMgr)
+      m_pFontMgr->RemoveFont(this);
+    delete this;
+  }
+}
+CFGAS_GEFont* CFGAS_GEFont::Retain() {
+  ++m_iRefCount;
+  return this;
+}
+
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+bool CFGAS_GEFont::LoadFontInternal(const FX_WCHAR* pszFontFamily,
+                                    uint32_t dwFontStyles,
+                                    uint16_t wCodePage) {
+  if (m_pFont)
+    return false;
+  CFX_ByteString csFontFamily;
+  if (pszFontFamily)
+    csFontFamily = CFX_ByteString::FromUnicode(pszFontFamily);
+  uint32_t dwFlags = 0;
+  if (dwFontStyles & FX_FONTSTYLE_FixedPitch)
+    dwFlags |= FXFONT_FIXED_PITCH;
+  if (dwFontStyles & FX_FONTSTYLE_Serif)
+    dwFlags |= FXFONT_SERIF;
+  if (dwFontStyles & FX_FONTSTYLE_Symbolic)
+    dwFlags |= FXFONT_SYMBOLIC;
+  if (dwFontStyles & FX_FONTSTYLE_Script)
+    dwFlags |= FXFONT_SCRIPT;
+  if (dwFontStyles & FX_FONTSTYLE_Italic)
+    dwFlags |= FXFONT_ITALIC;
+  if (dwFontStyles & FX_FONTSTYLE_Bold)
+    dwFlags |= FXFONT_BOLD;
+  if (dwFontStyles & FX_FONTSTYLE_ExactMatch)
+    dwFlags |= FXFONT_EXACTMATCH;
+  int32_t iWeight =
+      (dwFontStyles & FX_FONTSTYLE_Bold) ? FXFONT_FW_BOLD : FXFONT_FW_NORMAL;
+  m_pFont = new CFX_Font;
+  if ((dwFlags & FXFONT_ITALIC) && (dwFlags & FXFONT_BOLD))
+    csFontFamily += ",BoldItalic";
+  else if (dwFlags & FXFONT_BOLD)
+    csFontFamily += ",Bold";
+  else if (dwFlags & FXFONT_ITALIC)
+    csFontFamily += ",Italic";
+  m_pFont->LoadSubst(csFontFamily, true, dwFlags, iWeight, 0, wCodePage, false);
+  if (!m_pFont->GetFace())
+    return false;
+  return InitFont();
+}
+
+bool CFGAS_GEFont::LoadFontInternal(const uint8_t* pBuffer, int32_t length) {
+  if (m_pFont)
+    return false;
+
+  m_pFont = new CFX_Font;
+  if (!m_pFont->LoadEmbedded(pBuffer, length))
+    return false;
+  return InitFont();
+}
+
+bool CFGAS_GEFont::LoadFontInternal(IFX_Stream* pFontStream, bool bSaveStream) {
+  if (m_pFont || m_pFileRead || !pFontStream || pFontStream->GetLength() < 1)
+    return false;
+  if (bSaveStream)
+    m_pStream.reset(pFontStream);
+
+  m_pFileRead.reset(FX_CreateFileRead(pFontStream, false));
+  m_pFont = new CFX_Font;
+  if (m_pFont->LoadFile(m_pFileRead.get()))
+    return InitFont();
+  m_pFileRead.reset();
+  return false;
+}
+#endif  // _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+
+bool CFGAS_GEFont::LoadFontInternal(CFX_Font* pExternalFont) {
+  if (m_pFont || !pExternalFont)
+    return false;
+
+  m_pFont = pExternalFont;
+  m_bExternalFont = true;
+  return InitFont();
+}
+
+bool CFGAS_GEFont::LoadFontInternal(std::unique_ptr<CFX_Font> pInternalFont) {
+  if (m_pFont || !pInternalFont)
+    return false;
+
+  m_pFont = pInternalFont.release();
+  m_bExternalFont = false;
+  return InitFont();
+}
+
+bool CFGAS_GEFont::InitFont() {
+  if (!m_pFont)
+    return false;
+  if (!m_pFontEncoding) {
+    m_pFontEncoding.reset(FX_CreateFontEncodingEx(m_pFont));
+    if (!m_pFontEncoding)
+      return false;
+  }
+  if (!m_pCharWidthMap) {
+    m_pCharWidthMap =
+        pdfium::MakeUnique<CFX_DiscreteArrayTemplate<uint16_t>>(1024);
+  }
+  if (!m_pRectArray)
+    m_pRectArray = pdfium::MakeUnique<CFX_MassArrayTemplate<CFX_Rect>>(16);
+  if (!m_pBBoxMap)
+    m_pBBoxMap = pdfium::MakeUnique<CFX_MapPtrToPtr>(16);
+
+  return true;
+}
+
+CFGAS_GEFont* CFGAS_GEFont::Derive(uint32_t dwFontStyles, uint16_t wCodePage) {
+  if (GetFontStyles() == dwFontStyles)
+    return Retain();
+  return new CFGAS_GEFont(this, dwFontStyles);
+}
+
+CFX_WideString CFGAS_GEFont::GetFamilyName() const {
+  if (!m_pFont->GetSubstFont() ||
+      m_pFont->GetSubstFont()->m_Family.GetLength() == 0) {
+    return CFX_WideString::FromLocal(m_pFont->GetFamilyName().AsStringC());
+  }
+  return CFX_WideString::FromLocal(
+      m_pFont->GetSubstFont()->m_Family.AsStringC());
+}
+
+uint32_t CFGAS_GEFont::GetFontStyles() const {
+  ASSERT(m_pFont);
+#if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_
+  if (m_bUseLogFontStyle)
+    return m_dwLogFontStyle;
+#endif
+
+  uint32_t dwStyles = 0;
+  auto* pSubstFont = m_pFont->GetSubstFont();
+  if (pSubstFont) {
+    if (pSubstFont->m_Weight == FXFONT_FW_BOLD)
+      dwStyles |= FX_FONTSTYLE_Bold;
+    if (pSubstFont->m_SubstFlags & FXFONT_SUBST_ITALIC)
+      dwStyles |= FX_FONTSTYLE_Italic;
+  } else {
+    if (m_pFont->IsBold())
+      dwStyles |= FX_FONTSTYLE_Bold;
+    if (m_pFont->IsItalic())
+      dwStyles |= FX_FONTSTYLE_Italic;
+  }
+  return dwStyles;
+}
+
+bool CFGAS_GEFont::GetCharWidth(FX_WCHAR wUnicode,
+                                int32_t& iWidth,
+                                bool bCharCode) {
+  return GetCharWidthInternal(wUnicode, iWidth, true, bCharCode);
+}
+
+bool CFGAS_GEFont::GetCharWidthInternal(FX_WCHAR wUnicode,
+                                        int32_t& iWidth,
+                                        bool bRecursive,
+                                        bool bCharCode) {
+  ASSERT(m_pCharWidthMap);
+  iWidth = m_pCharWidthMap->GetAt(wUnicode, 0);
+  if (iWidth == 65535)
+    return false;
+
+  if (iWidth > 0)
+    return true;
+
+  if (!m_pProvider ||
+      !m_pProvider->GetCharWidth(this, wUnicode, bCharCode, &iWidth)) {
+    CFGAS_GEFont* pFont = nullptr;
+    int32_t iGlyph = GetGlyphIndex(wUnicode, true, &pFont, bCharCode);
+    if (iGlyph != 0xFFFF && pFont) {
+      if (pFont == this) {
+        iWidth = m_pFont->GetGlyphWidth(iGlyph);
+        if (iWidth < 0)
+          iWidth = -1;
+      } else if (pFont->GetCharWidthInternal(wUnicode, iWidth, false,
+                                             bCharCode)) {
+        return true;
+      }
+    } else {
+      iWidth = -1;
+    }
+  }
+  m_pCharWidthMap->SetAtGrow(wUnicode, iWidth);
+  return iWidth > 0;
+}
+
+bool CFGAS_GEFont::GetCharBBox(FX_WCHAR wUnicode,
+                               CFX_Rect& bbox,
+                               bool bCharCode) {
+  return GetCharBBoxInternal(wUnicode, bbox, true, bCharCode);
+}
+
+bool CFGAS_GEFont::GetCharBBoxInternal(FX_WCHAR wUnicode,
+                                       CFX_Rect& bbox,
+                                       bool bRecursive,
+                                       bool bCharCode) {
+  ASSERT(m_pRectArray);
+  ASSERT(m_pBBoxMap);
+  void* pRect = nullptr;
+  if (!m_pBBoxMap->Lookup((void*)(uintptr_t)wUnicode, pRect)) {
+    CFGAS_GEFont* pFont = nullptr;
+    int32_t iGlyph = GetGlyphIndex(wUnicode, true, &pFont, bCharCode);
+    if (iGlyph != 0xFFFF && pFont) {
+      if (pFont == this) {
+        FX_RECT rtBBox;
+        if (m_pFont->GetGlyphBBox(iGlyph, rtBBox)) {
+          CFX_Rect rt;
+          rt.Set(rtBBox.left, rtBBox.top, rtBBox.Width(), rtBBox.Height());
+          int32_t index = m_pRectArray->Add(rt);
+          pRect = m_pRectArray->GetPtrAt(index);
+          m_pBBoxMap->SetAt((void*)(uintptr_t)wUnicode, pRect);
+        }
+      } else if (pFont->GetCharBBoxInternal(wUnicode, bbox, false, bCharCode)) {
+        return true;
+      }
+    }
+  }
+  if (!pRect)
+    return false;
+
+  bbox = *static_cast<const CFX_Rect*>(pRect);
+  return true;
+}
+
+bool CFGAS_GEFont::GetBBox(CFX_Rect& bbox) {
+  FX_RECT rt(0, 0, 0, 0);
+  if (!m_pFont->GetBBox(rt))
+    return false;
+  bbox.left = rt.left;
+  bbox.width = rt.Width();
+  bbox.top = rt.bottom;
+  bbox.height = -rt.Height();
+  return true;
+}
+
+int32_t CFGAS_GEFont::GetGlyphIndex(FX_WCHAR wUnicode, bool bCharCode) {
+  return GetGlyphIndex(wUnicode, true, nullptr, bCharCode);
+}
+
+int32_t CFGAS_GEFont::GetGlyphIndex(FX_WCHAR wUnicode,
+                                    bool bRecursive,
+                                    CFGAS_GEFont** ppFont,
+                                    bool bCharCode) {
+  ASSERT(m_pFontEncoding);
+  int32_t iGlyphIndex = m_pFontEncoding->GlyphFromCharCode(wUnicode);
+  if (iGlyphIndex > 0) {
+    if (ppFont)
+      *ppFont = this;
+    return iGlyphIndex;
+  }
+  const FGAS_FONTUSB* pFontUSB = FGAS_GetUnicodeBitField(wUnicode);
+  if (!pFontUSB)
+    return 0xFFFF;
+
+  uint16_t wBitField = pFontUSB->wBitField;
+  if (wBitField >= 128)
+    return 0xFFFF;
+
+  auto it = m_FontMapper.find(wUnicode);
+  CFGAS_GEFont* pFont = it != m_FontMapper.end() ? it->second : nullptr;
+  if (pFont && pFont != this) {
+    iGlyphIndex = pFont->GetGlyphIndex(wUnicode, false, nullptr, bCharCode);
+    if (iGlyphIndex != 0xFFFF) {
+      int32_t i = m_SubstFonts.Find(pFont);
+      if (i > -1) {
+        iGlyphIndex |= ((i + 1) << 24);
+        if (ppFont)
+          *ppFont = pFont;
+        return iGlyphIndex;
+      }
+    }
+  }
+  if (!m_pFontMgr || !bRecursive)
+    return 0xFFFF;
+  CFX_WideString wsFamily = GetFamilyName();
+  pFont =
+      m_pFontMgr->GetFontByUnicode(wUnicode, GetFontStyles(), wsFamily.c_str());
+#if _FXM_PLATFORM_ != _FXM_PLATFORM_WINDOWS_
+  if (!pFont)
+    pFont = m_pFontMgr->GetFontByUnicode(wUnicode, GetFontStyles(), nullptr);
+#endif
+  if (!pFont)
+    return 0xFFFF;
+  if (pFont == this) {
+    pFont->Release();
+    return 0xFFFF;
+  }
+  m_FontMapper[wUnicode] = pFont;
+  int32_t i = m_SubstFonts.GetSize();
+  m_SubstFonts.Add(pFont);
+  iGlyphIndex = pFont->GetGlyphIndex(wUnicode, false, nullptr, bCharCode);
+  if (iGlyphIndex == 0xFFFF)
+    return 0xFFFF;
+  iGlyphIndex |= ((i + 1) << 24);
+  if (ppFont)
+    *ppFont = pFont;
+  return iGlyphIndex;
+}
+
+int32_t CFGAS_GEFont::GetAscent() const {
+  return m_pFont->GetAscent();
+}
+
+int32_t CFGAS_GEFont::GetDescent() const {
+  return m_pFont->GetDescent();
+}
+
+CFGAS_GEFont* CFGAS_GEFont::GetSubstFont(int32_t iGlyphIndex) const {
+  iGlyphIndex = static_cast<uint32_t>(iGlyphIndex) >> 24;
+  return iGlyphIndex == 0 ? const_cast<CFGAS_GEFont*>(this)
+                          : m_SubstFonts[iGlyphIndex - 1];
+}