Merge to XFA: Cleanup CFX_UnicodeEncoding and remove IFX_FontEncoding.

Similarly, Clean up CFX_UnicodeEncodingEx and remove IFX_FontEncodingEx.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1296753003 .

(cherry picked from commit 52a48aadc19b2dee8abeb702269bb168eb6b6999)

Review URL: https://codereview.chromium.org/1297083002 .

3 files changed, 78 insertions, 190 deletions

diff --git a/core/src/fpdfapi/fpdf_edit/fpdf_edit_doc.cpp b/core/src/fpdfapi/fpdf_edit/fpdf_edit_doc.cpp
index 925693079f..1ff9876acc 100644
--- a/core/src/fpdfapi/fpdf_edit/fpdf_edit_doc.cpp
+++ b/core/src/fpdfapi/fpdf_edit/fpdf_edit_doc.cpp
@@ -426,6 +426,7 @@ CPDF_Font* CPDF_Document::AddWindowsFont(LOGFONTA* pLogFont,
   return LoadFont(pBaseDict);
 }
 #endif
+
 #if (_FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_)
 uint32_t FX_GetLangHashCode(const FX_CHAR* pStr) {
   FXSYS_assert(pStr != NULL);
@@ -791,9 +792,10 @@ CPDF_Font* CPDF_Document::AddMacFont(CTFontRef pFont,
   CFRelease(languages);
   return LoadFont(pBaseDict);
 }
-#endif
+#endif  // (_FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_)
+
 static void _InsertWidthArray1(CFX_Font* pFont,
-                               IFX_FontEncoding* pEncoding,
+                               CFX_UnicodeEncoding* pEncoding,
                                FX_WCHAR start,
                                FX_WCHAR end,
                                CPDF_Array* pWidthArray) {
@@ -821,6 +823,7 @@ static void _InsertWidthArray1(CFX_Font* pFont,
   }
   FX_Free(widths);
 }
+
 CPDF_Font* CPDF_Document::AddFont(CFX_Font* pFont, int charset, FX_BOOL bVert) {
   if (pFont == NULL) {
     return NULL;
@@ -843,7 +846,8 @@ CPDF_Font* CPDF_Document::AddFont(CFX_Font* pFont, int charset, FX_BOOL bVert) {
   }
   CPDF_Dictionary* pBaseDict = new CPDF_Dictionary;
   pBaseDict->SetAtName("Type", "Font");
-  IFX_FontEncoding* pEncoding = FXGE_CreateUnicodeEncoding(pFont);
+  nonstd::unique_ptr<CFX_UnicodeEncoding> pEncoding(
+      new CFX_UnicodeEncoding(pFont));
   CPDF_Dictionary* pFontDict = pBaseDict;
   if (!bCJK) {
     CPDF_Array* pWidths = new CPDF_Array;
@@ -921,35 +925,35 @@ CPDF_Font* CPDF_Document::AddFont(CFX_Font* pFont, int charset, FX_BOOL bVert) {
         ordering = "CNS1";
         supplement = 4;
         pWidthArray->AddInteger(1);
-        _InsertWidthArray1(pFont, pEncoding, 0x20, 0x7e, pWidthArray);
+        _InsertWidthArray1(pFont, pEncoding.get(), 0x20, 0x7e, pWidthArray);
         break;
       case FXFONT_GB2312_CHARSET:
         cmap = bVert ? "GBK-EUC-V" : "GBK-EUC-H";
         ordering = "GB1", supplement = 2;
         pWidthArray->AddInteger(7716);
-        _InsertWidthArray1(pFont, pEncoding, 0x20, 0x20, pWidthArray);
+        _InsertWidthArray1(pFont, pEncoding.get(), 0x20, 0x20, pWidthArray);
         pWidthArray->AddInteger(814);
-        _InsertWidthArray1(pFont, pEncoding, 0x21, 0x7e, pWidthArray);
+        _InsertWidthArray1(pFont, pEncoding.get(), 0x21, 0x7e, pWidthArray);
         break;
       case FXFONT_HANGEUL_CHARSET:
         cmap = bVert ? "KSCms-UHC-V" : "KSCms-UHC-H";
         ordering = "Korea1";
         supplement = 2;
         pWidthArray->AddInteger(1);
-        _InsertWidthArray1(pFont, pEncoding, 0x20, 0x7e, pWidthArray);
+        _InsertWidthArray1(pFont, pEncoding.get(), 0x20, 0x7e, pWidthArray);
         break;
       case FXFONT_SHIFTJIS_CHARSET:
         cmap = bVert ? "90ms-RKSJ-V" : "90ms-RKSJ-H";
         ordering = "Japan1";
         supplement = 5;
         pWidthArray->AddInteger(231);
-        _InsertWidthArray1(pFont, pEncoding, 0x20, 0x7d, pWidthArray);
+        _InsertWidthArray1(pFont, pEncoding.get(), 0x20, 0x7d, pWidthArray);
         pWidthArray->AddInteger(326);
-        _InsertWidthArray1(pFont, pEncoding, 0xa0, 0xa0, pWidthArray);
+        _InsertWidthArray1(pFont, pEncoding.get(), 0xa0, 0xa0, pWidthArray);
         pWidthArray->AddInteger(327);
-        _InsertWidthArray1(pFont, pEncoding, 0xa1, 0xdf, pWidthArray);
+        _InsertWidthArray1(pFont, pEncoding.get(), 0xa1, 0xdf, pWidthArray);
         pWidthArray->AddInteger(631);
-        _InsertWidthArray1(pFont, pEncoding, 0x7e, 0x7e, pWidthArray);
+        _InsertWidthArray1(pFont, pEncoding.get(), 0x7e, 0x7e, pWidthArray);
         break;
     }
     pBaseDict->SetAtName("Subtype", "Type0");
@@ -1003,7 +1007,6 @@ CPDF_Font* CPDF_Document::AddFont(CFX_Font* pFont, int charset, FX_BOOL bVert) {
       }
     }
   }
-  delete pEncoding;
   pFontDesc->SetAtInteger("StemV", nStemV);
   AddIndirectObject(pFontDesc);
   pFontDict->SetAtReference("FontDescriptor", this, pFontDesc);
diff --git a/core/src/fxge/ge/fx_ge_font.cpp b/core/src/fxge/ge/fx_ge_font.cpp
index 63e9b52954..c3e887146f 100644
--- a/core/src/fxge/ge/fx_ge_font.cpp
+++ b/core/src/fxge/ge/fx_ge_font.cpp
@@ -7,10 +7,39 @@
 #include "../../../include/fxge/fx_ge.h"
 #include "../../../include/fxge/fx_freetype.h"
 #include "text_int.h"
+
 #define EM_ADJUST(em, a) (em == 0 ? (a) : (a)*1000 / em)
 extern void _FPDFAPI_GetInternalFontData(int id1,
                                          const uint8_t*& data,
                                          FX_DWORD& size);
+
+namespace {
+
+const FX_DWORD g_EncodingID[] = {
+  FXFM_ENCODING_MS_SYMBOL,
+  FXFM_ENCODING_UNICODE,
+  FXFM_ENCODING_MS_SJIS,
+  FXFM_ENCODING_MS_GB2312,
+  FXFM_ENCODING_MS_BIG5,
+  FXFM_ENCODING_MS_WANSUNG,
+  FXFM_ENCODING_MS_JOHAB,
+  FXFM_ENCODING_ADOBE_STANDARD,
+  FXFM_ENCODING_ADOBE_EXPERT,
+  FXFM_ENCODING_ADOBE_CUSTOM,
+  FXFM_ENCODING_ADOBE_LATIN_1,
+  FXFM_ENCODING_OLD_LATIN_2,
+  FXFM_ENCODING_APPLE_ROMAN,
+};
+
+CFX_UnicodeEncodingEx* _FXFM_CreateFontEncoding(CFX_Font* pFont,
+                                                FX_DWORD nEncodingID) {
+  if (FXFT_Select_Charmap(pFont->m_Face, nEncodingID))
+    return nullptr;
+  return new CFX_UnicodeEncodingEx(pFont, nEncodingID);
+}
+
+}  // namespace
+
 CFX_Font::CFX_Font() {
   m_pSubstFont = NULL;
   m_Face = NULL;
@@ -420,67 +449,41 @@ int CFX_Font::GetULthickness() {
                             FXFT_Get_Face_UnderLineThickness(m_Face));
   return thickness;
 }
-CFX_UnicodeEncoding::CFX_UnicodeEncoding(CFX_Font* pFont) {
-  m_pFont = pFont;
+
+CFX_UnicodeEncoding::CFX_UnicodeEncoding(CFX_Font* pFont) : m_pFont(pFont) {
 }
+
+CFX_UnicodeEncoding::~CFX_UnicodeEncoding() {
+}
+
 FX_DWORD CFX_UnicodeEncoding::GlyphFromCharCode(FX_DWORD charcode) {
   FXFT_Face face = m_pFont->GetFace();
-  if (!face) {
+  if (!face)
     return charcode;
-  }
-  if (FXFT_Select_Charmap(face, FXFT_ENCODING_UNICODE) == 0) {
+
+  if (FXFT_Select_Charmap(face, FXFT_ENCODING_UNICODE) == 0)
     return FXFT_Get_Char_Index(face, charcode);
-  }
+
   if (m_pFont->m_pSubstFont && m_pFont->m_pSubstFont->m_Charset == 2) {
     FX_DWORD index = 0;
-    if (FXFT_Select_Charmap(face, FXFT_ENCODING_MS_SYMBOL) == 0) {
+    if (FXFT_Select_Charmap(face, FXFT_ENCODING_MS_SYMBOL) == 0)
       index = FXFT_Get_Char_Index(face, charcode);
-    }
-    if (!index && !FXFT_Select_Charmap(face, FXFT_ENCODING_APPLE_ROMAN)) {
+    if (!index && !FXFT_Select_Charmap(face, FXFT_ENCODING_APPLE_ROMAN))
       return FXFT_Get_Char_Index(face, charcode);
-    }
   }
   return charcode;
 }
-FX_DWORD CFX_UnicodeEncoding::GlyphFromCharCodeEx(FX_DWORD charcode,
-                                                  int encoding) {
-  FXFT_Face face = m_pFont->GetFace();
-  if (!face) {
-    return charcode;
-  }
-  if (encoding == ENCODING_UNICODE) {
-    return GlyphFromCharCode(charcode);
-  }
-  int nmaps = FXFT_Get_Face_CharmapCount(m_pFont->m_Face);
-  int i = 0;
-  while (i < nmaps) {
-    int encoding = FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmaps(face)[i++]);
-    if (encoding != FXFT_ENCODING_UNICODE) {
-      FXFT_Select_Charmap(face, encoding);
-      break;
-    }
-  }
-  return FXFT_Get_Char_Index(face, charcode);
-}
-IFX_FontEncoding* FXGE_CreateUnicodeEncoding(CFX_Font* pFont) {
-  CFX_UnicodeEncoding* pEncoding = NULL;
-  pEncoding = new CFX_UnicodeEncoding(pFont);
-  return pEncoding;
-}
-CFX_FontEncodingEX::CFX_FontEncodingEX() {
-  m_pFont = NULL;
-  m_nEncodingID = FXFM_ENCODING_NONE;
+
+CFX_UnicodeEncodingEx::CFX_UnicodeEncodingEx(CFX_Font* pFont,
+                                             FX_DWORD EncodingID)
+    : CFX_UnicodeEncoding(pFont), m_nEncodingID(EncodingID) {
 }
-FX_BOOL CFX_FontEncodingEX::Init(CFX_Font* pFont, FX_DWORD EncodingID) {
-  if (!pFont) {
-    return FALSE;
-  }
-  m_pFont = pFont;
-  m_nEncodingID = EncodingID;
-  return TRUE;
+
+CFX_UnicodeEncodingEx::~CFX_UnicodeEncodingEx() {
 }
-FX_DWORD CFX_FontEncodingEX::GlyphFromCharCode(FX_DWORD charcode) {
-  FXFT_Face face = m_pFont->m_Face;
+
+FX_DWORD CFX_UnicodeEncodingEx::GlyphFromCharCode(FX_DWORD charcode) {
+  FXFT_Face face = m_pFont->GetFace();
   FT_UInt nIndex = FXFT_Get_Char_Index(face, charcode);
   if (nIndex > 0) {
     return nIndex;
@@ -506,14 +509,8 @@ FX_DWORD CFX_FontEncodingEX::GlyphFromCharCode(FX_DWORD charcode) {
   FXFT_Select_Charmap(face, m_nEncodingID);
   return 0;
 }
-CFX_WideString CFX_FontEncodingEX::UnicodeFromCharCode(
-    FX_DWORD charcode) const {
-  if (m_nEncodingID == FXFM_ENCODING_UNICODE) {
-    return CFX_WideString((FX_WCHAR)charcode);
-  }
-  return CFX_WideString((FX_WCHAR)0);
-}
-FX_DWORD CFX_FontEncodingEX::CharCodeFromUnicode(FX_WCHAR Unicode) const {
+
+FX_DWORD CFX_UnicodeEncodingEx::CharCodeFromUnicode(FX_WCHAR Unicode) const {
   if (m_nEncodingID == FXFM_ENCODING_UNICODE ||
       m_nEncodingID == FXFM_ENCODING_MS_SYMBOL) {
     return Unicode;
@@ -530,94 +527,18 @@ FX_DWORD CFX_FontEncodingEX::CharCodeFromUnicode(FX_WCHAR Unicode) const {
   }
   return -1;
 }
-FX_BOOL CFX_FontEncodingEX::IsUnicodeCompatible() const {
-  return m_nEncodingID == FXFM_ENCODING_UNICODE;
-}
-FX_DWORD CFX_FontEncodingEX::GlyphIndexFromName(const FX_CHAR* pStrName) {
-  FXFT_Face face = m_pFont->m_Face;
-  return FT_Get_Name_Index(face, (FT_String*)pStrName);
-}
-CFX_ByteString CFX_FontEncodingEX::NameFromGlyphIndex(FX_DWORD dwGlyphIndex) {
-  FXFT_Face face = m_pFont->m_Face;
-  CFX_ByteString glyphName("                ");
-  if (FT_HAS_GLYPH_NAMES(((FT_Face)face))) {
-    if (FT_Get_Glyph_Name((FT_Face)face, dwGlyphIndex,
-                          (FT_Pointer)(const FX_CHAR*)glyphName, 16)) {
-      glyphName.Empty();
-      return glyphName;
-    }
-    return glyphName;
-  } else {
-    return glyphName;
-  }
-}
-FX_DWORD CFX_FontEncodingEX::CharCodeFromGlyphIndex(FX_DWORD dwGlyphIndex) {
-  FXFT_Face face = m_pFont->GetFace();
-  FX_DWORD charcode;
-  FT_UInt gid;
-  charcode = FT_Get_First_Char((FT_Face)face, &gid);
-  while (gid != 0) {
-    if (dwGlyphIndex == gid) {
-      return charcode;
-    }
-    charcode = FT_Get_Next_Char((FT_Face)face, charcode, &gid);
-  }
-  int nmaps = FXFT_Get_Face_CharmapCount(face);
-  int m = 0;
-  while (m < nmaps) {
-    int nEncodingID =
-        FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmaps(face)[m++]);
-    if (m_nEncodingID == nEncodingID) {
-      continue;
-    }
-    int error = FXFT_Select_Charmap(face, nEncodingID);
-    if (error) {
-      continue;
-    }
-    charcode = FT_Get_First_Char((FT_Face)face, &gid);
-    while (gid != 0) {
-      if (dwGlyphIndex == gid) {
-        m_nEncodingID = nEncodingID;
-        return charcode;
-      }
-      charcode = FT_Get_Next_Char((FT_Face)face, charcode, &gid);
-    }
-  }
-  return (FX_DWORD)-1;
-}
-static const FX_DWORD gs_EncodingID[] = {
-    FXFM_ENCODING_MS_SYMBOL,     FXFM_ENCODING_UNICODE,
-    FXFM_ENCODING_MS_SJIS,       FXFM_ENCODING_MS_GB2312,
-    FXFM_ENCODING_MS_BIG5,       FXFM_ENCODING_MS_WANSUNG,
-    FXFM_ENCODING_MS_JOHAB,      FXFM_ENCODING_ADOBE_STANDARD,
-    FXFM_ENCODING_ADOBE_EXPERT,  FXFM_ENCODING_ADOBE_CUSTOM,
-    FXFM_ENCODING_ADOBE_LATIN_1, FXFM_ENCODING_OLD_LATIN_2,
-    FXFM_ENCODING_APPLE_ROMAN};
-static IFX_FontEncodingEx* _FXFM_CreateFontEncoding(CFX_Font* pFont,
-                                                    FX_DWORD nEncodingID) {
-  int error = FXFT_Select_Charmap(pFont->m_Face, nEncodingID);
-  if (error) {
-    return NULL;
-  }
-  CFX_FontEncodingEX* pFontEncoding = new CFX_FontEncodingEX;
-  if (pFontEncoding && !pFontEncoding->Init(pFont, nEncodingID)) {
-    delete pFontEncoding;
-    pFontEncoding = NULL;
-  }
-  return pFontEncoding;
-}
-IFX_FontEncodingEx* FX_CreateFontEncodingEx(CFX_Font* pFont,
-                                            FX_DWORD nEncodingID) {
-  if (!pFont || !pFont->m_Face) {
-    return NULL;
-  }
-  if (nEncodingID != FXFM_ENCODING_NONE) {
+
+CFX_UnicodeEncodingEx* FX_CreateFontEncodingEx(CFX_Font* pFont,
+                                               FX_DWORD nEncodingID) {
+  if (!pFont || !pFont->m_Face)
+    return nullptr;
+
+  if (nEncodingID != FXFM_ENCODING_NONE)
     return _FXFM_CreateFontEncoding(pFont, nEncodingID);
-  }
-  static int s_count = sizeof(gs_EncodingID) / sizeof(FX_DWORD);
-  for (int i = 0; i < s_count; i++) {
-    IFX_FontEncodingEx* pFontEncoding =
-        _FXFM_CreateFontEncoding(pFont, gs_EncodingID[i]);
+
+  for (size_t i = 0; i < FX_ArraySize(g_EncodingID); ++i) {
+    CFX_UnicodeEncodingEx* pFontEncoding =
+        _FXFM_CreateFontEncoding(pFont, g_EncodingID[i]);
     if (pFontEncoding) {
       return pFontEncoding;
     }
diff --git a/core/src/fxge/ge/text_int.h b/core/src/fxge/ge/text_int.h
index 9279969e0a..b0193c4f2e 100644
--- a/core/src/fxge/ge/text_int.h
+++ b/core/src/fxge/ge/text_int.h
@@ -41,23 +41,7 @@ class CTTFontDesc {
   uint8_t* m_pFontData;
   int m_RefCount;
 };
-class CFX_UnicodeEncoding : public IFX_FontEncoding {
- public:
-  CFX_UnicodeEncoding(CFX_Font* pFont);
-  virtual FX_DWORD GlyphFromCharCodeEx(FX_DWORD charcode,
-                                       int encoding = ENCODING_UNICODE);
 
- private:
-  CFX_Font* m_pFont;
-  virtual FX_DWORD GlyphFromCharCode(FX_DWORD charcode);
-  virtual CFX_WideString UnicodeFromCharCode(FX_DWORD charcode) const {
-    return CFX_WideString((FX_WCHAR)charcode);
-  }
-  virtual FX_DWORD CharCodeFromUnicode(FX_WCHAR Unicode) const {
-    return Unicode;
-  }
-  virtual FX_BOOL IsUnicodeCompatible() const { return TRUE; }
-};
 #define CHARSET_FLAG_ANSI 1
 #define CHARSET_FLAG_SYMBOL 2
 #define CHARSET_FLAG_SHIFTJIS 4
@@ -105,25 +89,5 @@ class CFontFileFaceInfo {
   int m_PitchFamily;
   CFX_ByteString m_FontTables;
 };
-class CFX_FontEncodingEX : public IFX_FontEncodingEx {
- public:
-  CFX_FontEncodingEX();
-  FX_BOOL Init(CFX_Font* pFont, FX_DWORD EncodingID);
-  virtual FX_DWORD GlyphIndexFromName(const FX_CHAR* pStrName);
-  virtual CFX_ByteString NameFromGlyphIndex(FX_DWORD dwGlyphIndex);
-  virtual FX_DWORD CharCodeFromGlyphIndex(FX_DWORD dwGlyphIndex);
-  virtual FX_DWORD GlyphFromCharCode(FX_DWORD charcode);
-  virtual CFX_WideString UnicodeFromCharCode(FX_DWORD charcode) const;
-  virtual FX_DWORD CharCodeFromUnicode(FX_WCHAR Unicode) const;
-  virtual FX_BOOL IsUnicodeCompatible() const;
-  virtual FX_DWORD GlyphFromCharCodeEx(FX_DWORD charcode,
-                                       int encoding = ENCODING_UNICODE) {
-    return GlyphFromCharCode(charcode);
-  }
-
- private:
-  CFX_Font* m_pFont;
-  FX_DWORD m_nEncodingID;
-};
 
 #endif  // CORE_SRC_FXGE_GE_TEXT_INT_H_