Remove useless CPDF_FontCharMap.

core/src/fpdfapi/fpdf_font/fpdf_font.cpp

 // 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 "core/src/fpdfapi/fpdf_font/font_int.h"
 
 #include "core/include/fpdfapi/fpdf_module.h"
 #include "core/include/fpdfapi/fpdf_page.h"
@@ skipping 70 matching lines @@
   m_StockMap.erase(pDoc);
 }
 
 CPDF_Font::CPDF_Font(int fonttype) : m_FontType(fonttype) {
   m_FontBBox.left = m_FontBBox.right = m_FontBBox.top = m_FontBBox.bottom = 0;
   m_StemV = m_Ascent = m_Descent = m_ItalicAngle = 0;
   m_pFontFile = NULL;
   m_Flags = 0;
   m_pToUnicodeMap = NULL;
   m_bToUnicodeLoaded = FALSE;
-  m_pCharMap = new CPDF_FontCharMap(this);
 }
 CPDF_Font::~CPDF_Font() {
-  delete m_pCharMap;
-  m_pCharMap = NULL;
-
   delete m_pToUnicodeMap;
   m_pToUnicodeMap = NULL;
 
   if (m_pFontFile) {
     m_pDocument->GetPageData()->ReleaseFontFileStreamAcc(
         const_cast<CPDF_Stream*>(m_pFontFile->GetStream()->AsStream()));
   }
 }
 FX_BOOL CPDF_Font::IsVertWriting() const {
   FX_BOOL bVertWriting = FALSE;
@@ skipping 48 matching lines @@
     ((CPDF_Font*)this)->LoadUnicodeMap();
   }
   if (m_pToUnicodeMap) {
     FX_DWORD charcode = m_pToUnicodeMap->ReverseLookup(unicode);
     if (charcode) {
       return charcode;
     }
   }
   return _CharCodeFromUnicode(unicode);
 }
-CFX_WideString CPDF_Font::DecodeString(const CFX_ByteString& str) const {
-  CFX_WideString result;
-  int src_len = str.GetLength();
-  result.Reserve(src_len);
-  const FX_CHAR* src_buf = str;
-  int src_pos = 0;
-  while (src_pos < src_len) {
-    FX_DWORD charcode = GetNextChar(src_buf, src_len, src_pos);
-    CFX_WideString unicode = UnicodeFromCharCode(charcode);
-    if (!unicode.IsEmpty()) {
-      result += unicode;
-    } else {
-      result += (FX_WCHAR)charcode;
-    }
-  }
-  return result;
-}
-CFX_ByteString CPDF_Font::EncodeString(const CFX_WideString& str) const {
-  CFX_ByteString result;
-  int src_len = str.GetLength();
-  FX_CHAR* dest_buf = result.GetBuffer(src_len * 2);
-  const FX_WCHAR* src_buf = str.c_str();
-  int dest_pos = 0;
-  for (int src_pos = 0; src_pos < src_len; src_pos++) {
-    FX_DWORD charcode = CharCodeFromUnicode(src_buf[src_pos]);
-    dest_pos += AppendChar(dest_buf + dest_pos, charcode);
-  }
-  result.ReleaseBuffer(dest_pos);
-  return result;
-}
 
 void CPDF_Font::LoadFontDescriptor(CPDF_Dictionary* pFontDesc) {
   m_Flags = pFontDesc->GetIntegerBy("Flags", PDFFONT_NONSYMBOLIC);
   int ItalicAngle = 0;
   FX_BOOL bExistItalicAngle = FALSE;
   if (pFontDesc->KeyExist("ItalicAngle")) {
     ItalicAngle = pFontDesc->GetIntegerBy("ItalicAngle");
     bExistItalicAngle = TRUE;
   }
   if (ItalicAngle < 0) {
@@ skipping 227 matching lines @@
   if (!m_pFontDict) {
     return FALSE;
   }
   CFX_ByteString type = m_pFontDict->GetStringBy("Subtype");
   m_BaseFont = m_pFontDict->GetStringBy("BaseFont");
   if (type == "MMType1") {
     type = "Type1";
   }
   return _Load();
 }
-static CFX_WideString _FontMap_GetWideString(CFX_CharMap* pMap,
-                                             const CFX_ByteString& bytestr) {
-  return ((CPDF_FontCharMap*)pMap)->m_pFont->DecodeString(bytestr);
-}
-static CFX_ByteString _FontMap_GetByteString(CFX_CharMap* pMap,
-                                             const CFX_WideString& widestr) {
-  return ((CPDF_FontCharMap*)pMap)->m_pFont->EncodeString(widestr);
-}
-CPDF_FontCharMap::CPDF_FontCharMap(CPDF_Font* pFont) {
-  m_GetByteString = _FontMap_GetByteString;
-  m_GetWideString = _FontMap_GetWideString;
-  m_pFont = pFont;
-}
+
 CFX_WideString CPDF_ToUnicodeMap::Lookup(FX_DWORD charcode) {
   auto it = m_Map.find(charcode);
   if (it != m_Map.end()) {
     FX_DWORD value = it->second;
     FX_WCHAR unicode = (FX_WCHAR)(value & 0xffff);
     if (unicode != 0xffff) {
       return unicode;
     }
     const FX_WCHAR* buf = m_MultiCharBuf.GetBuffer();
     FX_DWORD buf_len = m_MultiCharBuf.GetLength();
@@ skipping 1271 matching lines @@
   rect = pChar->m_BBox;
 }
 
 CPDF_Type3Char::CPDF_Type3Char(CPDF_Form* pForm)
     : m_pForm(pForm), m_pBitmap(nullptr), m_bColored(FALSE) {}
 
 CPDF_Type3Char::~CPDF_Type3Char() {
   delete m_pForm;
   delete m_pBitmap;
 }