Refactor CFGAS_FontMgr's Windows implementation

This CL unifies a bit the public methods of CFGAS_FontMgr. It does so by
replacing the multiple maps on the Windows implementation to a single
map from hash to font. Also, cloning CFX_Fonts is avoided with the use
of SetLogicalFontStyle. These Windows changes are just mimicking other
OS's. As a side-effect, some members of CFX_Fonts are now owned so the
raw pointers are replaced with unique_ptrs.

Change-Id: I576d438572ccbe6c48f8f5cc434d66fc6adba372
Reviewed-on: https://pdfium-review.googlesource.com/18131
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Nicolás Peña Moreno <npm@chromium.org>

2 files changed, 8 insertions, 51 deletions

diff --git a/core/fxge/cfx_font.cpp b/core/fxge/cfx_font.cpp
index 3f4f1356f8..bca711f0bb 100644
--- a/core/fxge/cfx_font.cpp
+++ b/core/fxge/cfx_font.cpp
@@ -211,10 +211,6 @@ const uint8_t CFX_Font::s_WeightPow_SHIFTJIS[] = {
 
 CFX_Font::CFX_Font()
     :
-#ifdef PDF_ENABLE_XFA
-      m_bShallowCopy(false),
-      m_pOwnedStream(nullptr),
-#endif  // PDF_ENABLE_XFA
       m_Face(nullptr),
       m_FaceCache(nullptr),
       m_pFontData(nullptr),
@@ -228,48 +224,13 @@ CFX_Font::CFX_Font()
 }
 
 #ifdef PDF_ENABLE_XFA
-bool CFX_Font::LoadClone(const CFX_Font* pFont) {
-  if (!pFont)
-    return false;
-
-  m_bShallowCopy = true;
-  if (pFont->m_pSubstFont) {
-    m_pSubstFont = pdfium::MakeUnique<CFX_SubstFont>();
-    m_pSubstFont->m_Charset = pFont->m_pSubstFont->m_Charset;
-    m_pSubstFont->m_bFlagMM = pFont->m_pSubstFont->m_bFlagMM;
-#ifdef PDF_ENABLE_XFA
-    m_pSubstFont->m_bFlagItalic = pFont->m_pSubstFont->m_bFlagItalic;
-#endif  // PDF_ENABLE_XFA
-    m_pSubstFont->m_Weight = pFont->m_pSubstFont->m_Weight;
-    m_pSubstFont->m_Family = pFont->m_pSubstFont->m_Family;
-    m_pSubstFont->m_ItalicAngle = pFont->m_pSubstFont->m_ItalicAngle;
-  }
-  m_Face = pFont->m_Face;
-  m_bEmbedded = pFont->m_bEmbedded;
-  m_bVertical = pFont->m_bVertical;
-  m_dwSize = pFont->m_dwSize;
-  m_pFontData = pFont->m_pFontData;
-  m_pGsubData = pFont->m_pGsubData;
-#if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
-  m_pPlatformFont = pFont->m_pPlatformFont;
-#endif
-  m_pOwnedStream = pFont->m_pOwnedStream;
-  m_FaceCache = pFont->GetFaceCache();
-  return true;
-}
-
 void CFX_Font::SetFace(FXFT_Face face) {
   ClearFaceCache();
   m_Face = face;
 }
-
 #endif  // PDF_ENABLE_XFA
 
 CFX_Font::~CFX_Font() {
-#ifdef PDF_ENABLE_XFA
-  if (m_bShallowCopy)
-    return;
-#endif  // PDF_ENABLE_XFA
   if (m_Face) {
 #ifndef PDF_ENABLE_XFA
     if (FXFT_Get_Face_External_Stream(m_Face)) {
@@ -278,11 +239,7 @@ CFX_Font::~CFX_Font() {
 #endif  // PDF_ENABLE_XFA
     DeleteFace();
   }
-#ifdef PDF_ENABLE_XFA
-  delete m_pOwnedStream;
-#endif  // PDF_ENABLE_XFA
-  FX_Free(m_pGsubData);
-#if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_ && !defined _SKIA_SUPPORT_
+#if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
   ReleasePlatformResource();
 #endif
 }
@@ -328,7 +285,7 @@ bool CFX_Font::LoadFile(const RetainPtr<IFX_SeekableReadStream>& pFile,
   if (!LoadFileImp(library, &m_Face, pFile, nFaceIndex, &stream))
     return false;
 
-  m_pOwnedStream = stream.release();
+  m_pOwnedStream = std::move(stream);
   FXFT_Set_Pixel_Sizes(m_Face, 0, 64);
   return true;
 }
diff --git a/core/fxge/cfx_font.h b/core/fxge/cfx_font.h
index ecb64e5009..13cb892c19 100644
--- a/core/fxge/cfx_font.h
+++ b/core/fxge/cfx_font.h
@@ -46,7 +46,6 @@ class CFX_Font {
 #ifdef PDF_ENABLE_XFA
   bool LoadFile(const RetainPtr<IFX_SeekableReadStream>& pFile, int nFaceIndex);
 
-  bool LoadClone(const CFX_Font* pFont);
   void SetFace(FXFT_Face face);
   void SetSubstFont(std::unique_ptr<CFX_SubstFont> subst) {
     m_pSubstFont = std::move(subst);
@@ -79,8 +78,8 @@ class CFX_Font {
   bool IsTTFont() const;
   bool GetBBox(FX_RECT& bbox);
   bool IsEmbedded() const { return m_bEmbedded; }
-  uint8_t* GetSubData() const { return m_pGsubData; }
-  void SetSubData(uint8_t* data) { m_pGsubData = data; }
+  uint8_t* GetSubData() const { return m_pGsubData.get(); }
+  void SetSubData(uint8_t* data) { m_pGsubData.reset(data); }
 #if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
   void* GetPlatformFont() const { return m_pPlatformFont; }
   void SetPlatformFont(void* font) { m_pPlatformFont = font; }
@@ -100,13 +99,14 @@ class CFX_Font {
 
 #ifdef PDF_ENABLE_XFA
  protected:
-  bool m_bShallowCopy;
-  FXFT_StreamRec* m_pOwnedStream;
+  std::unique_ptr<FXFT_StreamRec> m_pOwnedStream;
 #endif  // PDF_ENABLE_XFA
 
  private:
   CFX_FaceCache* GetFaceCache() const;
+#if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
   void ReleasePlatformResource();
+#endif  // _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
   void DeleteFace();
   void ClearFaceCache();
 
@@ -115,7 +115,7 @@ class CFX_Font {
   std::unique_ptr<CFX_SubstFont> m_pSubstFont;
   std::vector<uint8_t> m_pFontDataAllocation;
   uint8_t* m_pFontData;
-  uint8_t* m_pGsubData;
+  std::unique_ptr<uint8_t, FxFreeDeleter> m_pGsubData;
   uint32_t m_dwSize;
 #if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
   void* m_pPlatformFont;