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// 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 "fpdfsdk/pwl/cpwl_font_map.h"
#include <utility>
#include "core/fpdfapi/cpdf_modulemgr.h"
#include "core/fpdfapi/font/cpdf_font.h"
#include "core/fpdfapi/font/cpdf_fontencoding.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/parser/cpdf_parser.h"
#include "core/fpdfdoc/ipvt_fontmap.h"
#include "core/fxcrt/fx_codepage.h"
#include "fpdfsdk/pwl/cpwl_wnd.h"
#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
namespace {
const char kDefaultFontName[] = "Helvetica";
const char* const g_sDEStandardFontName[] = {"Courier",
"Courier-Bold",
"Courier-BoldOblique",
"Courier-Oblique",
"Helvetica",
"Helvetica-Bold",
"Helvetica-BoldOblique",
"Helvetica-Oblique",
"Times-Roman",
"Times-Bold",
"Times-Italic",
"Times-BoldItalic",
"Symbol",
"ZapfDingbats"};
} // namespace
CPWL_FontMap::CPWL_FontMap(CFX_SystemHandler* pSystemHandler)
: m_pSystemHandler(pSystemHandler) {
ASSERT(m_pSystemHandler);
}
CPWL_FontMap::~CPWL_FontMap() {
Empty();
}
CPDF_Document* CPWL_FontMap::GetDocument() {
if (!m_pPDFDoc) {
if (CPDF_ModuleMgr::Get()) {
m_pPDFDoc = pdfium::MakeUnique<CPDF_Document>(nullptr);
m_pPDFDoc->CreateNewDoc();
}
}
return m_pPDFDoc.get();
}
CPDF_Font* CPWL_FontMap::GetPDFFont(int32_t nFontIndex) {
if (pdfium::IndexInBounds(m_Data, nFontIndex) && m_Data[nFontIndex])
return m_Data[nFontIndex]->pFont;
return nullptr;
}
ByteString CPWL_FontMap::GetPDFFontAlias(int32_t nFontIndex) {
if (pdfium::IndexInBounds(m_Data, nFontIndex) && m_Data[nFontIndex])
return m_Data[nFontIndex]->sFontName;
return ByteString();
}
bool CPWL_FontMap::KnowWord(int32_t nFontIndex, uint16_t word) {
return pdfium::IndexInBounds(m_Data, nFontIndex) && m_Data[nFontIndex] &&
CharCodeFromUnicode(nFontIndex, word) >= 0;
}
int32_t CPWL_FontMap::GetWordFontIndex(uint16_t word,
int32_t nCharset,
int32_t nFontIndex) {
if (nFontIndex > 0) {
if (KnowWord(nFontIndex, word))
return nFontIndex;
} else {
if (const CPWL_FontMap_Data* pData = GetFontMapData(0)) {
if (nCharset == FX_CHARSET_Default ||
pData->nCharset == FX_CHARSET_Symbol || nCharset == pData->nCharset) {
if (KnowWord(0, word))
return 0;
}
}
}
int32_t nNewFontIndex =
GetFontIndex(GetNativeFontName(nCharset), nCharset, true);
if (nNewFontIndex >= 0) {
if (KnowWord(nNewFontIndex, word))
return nNewFontIndex;
}
nNewFontIndex = GetFontIndex("Arial Unicode MS", FX_CHARSET_Default, false);
if (nNewFontIndex >= 0) {
if (KnowWord(nNewFontIndex, word))
return nNewFontIndex;
}
return -1;
}
int32_t CPWL_FontMap::CharCodeFromUnicode(int32_t nFontIndex, uint16_t word) {
if (!pdfium::IndexInBounds(m_Data, nFontIndex))
return -1;
CPWL_FontMap_Data* pData = m_Data[nFontIndex].get();
if (!pData || !pData->pFont)
return -1;
if (pData->pFont->IsUnicodeCompatible())
return pData->pFont->CharCodeFromUnicode(word);
return word < 0xFF ? word : -1;
}
ByteString CPWL_FontMap::GetNativeFontName(int32_t nCharset) {
for (const auto& pData : m_NativeFont) {
if (pData && pData->nCharset == nCharset)
return pData->sFontName;
}
ByteString sNew = GetNativeFont(nCharset);
if (sNew.IsEmpty())
return ByteString();
auto pNewData = pdfium::MakeUnique<CPWL_FontMap_Native>();
pNewData->nCharset = nCharset;
pNewData->sFontName = sNew;
m_NativeFont.push_back(std::move(pNewData));
return sNew;
}
void CPWL_FontMap::Empty() {
m_Data.clear();
m_NativeFont.clear();
}
void CPWL_FontMap::Initialize() {
GetFontIndex(kDefaultFontName, FX_CHARSET_ANSI, false);
}
bool CPWL_FontMap::IsStandardFont(const ByteString& sFontName) {
for (size_t i = 0; i < FX_ArraySize(g_sDEStandardFontName); ++i) {
if (sFontName == g_sDEStandardFontName[i])
return true;
}
return false;
}
int32_t CPWL_FontMap::FindFont(const ByteString& sFontName, int32_t nCharset) {
int32_t i = 0;
for (const auto& pData : m_Data) {
if (pData &&
(nCharset == FX_CHARSET_Default || nCharset == pData->nCharset) &&
(sFontName.IsEmpty() || pData->sFontName == sFontName)) {
return i;
}
++i;
}
return -1;
}
int32_t CPWL_FontMap::GetFontIndex(const ByteString& sFontName,
int32_t nCharset,
bool bFind) {
int32_t nFontIndex = FindFont(EncodeFontAlias(sFontName, nCharset), nCharset);
if (nFontIndex >= 0)
return nFontIndex;
ByteString sAlias;
CPDF_Font* pFont = bFind ? FindFontSameCharset(&sAlias, nCharset) : nullptr;
if (!pFont) {
ByteString sTemp = sFontName;
pFont = AddFontToDocument(GetDocument(), sTemp, nCharset);
sAlias = EncodeFontAlias(sTemp, nCharset);
}
AddedFont(pFont, sAlias);
return AddFontData(pFont, sAlias, nCharset);
}
CPDF_Font* CPWL_FontMap::FindFontSameCharset(ByteString* sFontAlias,
int32_t nCharset) {
return nullptr;
}
int32_t CPWL_FontMap::AddFontData(CPDF_Font* pFont,
const ByteString& sFontAlias,
int32_t nCharset) {
auto pNewData = pdfium::MakeUnique<CPWL_FontMap_Data>();
pNewData->pFont = pFont;
pNewData->sFontName = sFontAlias;
pNewData->nCharset = nCharset;
m_Data.push_back(std::move(pNewData));
return pdfium::CollectionSize<int32_t>(m_Data) - 1;
}
void CPWL_FontMap::AddedFont(CPDF_Font* pFont, const ByteString& sFontAlias) {}
ByteString CPWL_FontMap::GetNativeFont(int32_t nCharset) {
if (nCharset == FX_CHARSET_Default)
nCharset = GetNativeCharset();
ByteString sFontName = GetDefaultFontByCharset(nCharset);
if (!m_pSystemHandler->FindNativeTrueTypeFont(sFontName))
return ByteString();
return sFontName;
}
CPDF_Font* CPWL_FontMap::AddFontToDocument(CPDF_Document* pDoc,
ByteString& sFontName,
uint8_t nCharset) {
if (IsStandardFont(sFontName))
return AddStandardFont(pDoc, sFontName);
return AddSystemFont(pDoc, sFontName, nCharset);
}
CPDF_Font* CPWL_FontMap::AddStandardFont(CPDF_Document* pDoc,
ByteString& sFontName) {
if (!pDoc)
return nullptr;
CPDF_Font* pFont = nullptr;
if (sFontName == "ZapfDingbats") {
pFont = pDoc->AddStandardFont(sFontName.c_str(), nullptr);
} else {
CPDF_FontEncoding fe(PDFFONT_ENCODING_WINANSI);
pFont = pDoc->AddStandardFont(sFontName.c_str(), &fe);
}
return pFont;
}
CPDF_Font* CPWL_FontMap::AddSystemFont(CPDF_Document* pDoc,
ByteString& sFontName,
uint8_t nCharset) {
if (!pDoc)
return nullptr;
if (sFontName.IsEmpty())
sFontName = GetNativeFont(nCharset);
if (nCharset == FX_CHARSET_Default)
nCharset = GetNativeCharset();
return m_pSystemHandler->AddNativeTrueTypeFontToPDF(pDoc, sFontName,
nCharset);
}
ByteString CPWL_FontMap::EncodeFontAlias(const ByteString& sFontName,
int32_t nCharset) {
ByteString sPostfix;
sPostfix.Format("_%02X", nCharset);
return EncodeFontAlias(sFontName) + sPostfix;
}
ByteString CPWL_FontMap::EncodeFontAlias(const ByteString& sFontName) {
ByteString sRet = sFontName;
sRet.Remove(' ');
return sRet;
}
const CPWL_FontMap_Data* CPWL_FontMap::GetFontMapData(int32_t nIndex) const {
return pdfium::IndexInBounds(m_Data, nIndex) ? m_Data[nIndex].get() : nullptr;
}
int32_t CPWL_FontMap::GetNativeCharset() {
uint8_t nCharset = FX_CHARSET_ANSI;
int32_t iCodePage = FXSYS_GetACP();
switch (iCodePage) {
case FX_CODEPAGE_ShiftJIS:
nCharset = FX_CHARSET_ShiftJIS;
break;
case FX_CODEPAGE_ChineseSimplified:
nCharset = FX_CHARSET_ChineseSimplified;
break;
case FX_CODEPAGE_ChineseTraditional:
nCharset = FX_CHARSET_ChineseTraditional;
break;
case FX_CODEPAGE_MSWin_WesternEuropean:
nCharset = FX_CHARSET_ANSI;
break;
case FX_CODEPAGE_MSDOS_Thai:
nCharset = FX_CHARSET_Thai;
break;
case FX_CODEPAGE_Hangul:
nCharset = FX_CHARSET_Hangul;
break;
case FX_CODEPAGE_UTF16LE:
nCharset = FX_CHARSET_ANSI;
break;
case FX_CODEPAGE_MSWin_EasternEuropean:
nCharset = FX_CHARSET_MSWin_EasternEuropean;
break;
case FX_CODEPAGE_MSWin_Cyrillic:
nCharset = FX_CHARSET_MSWin_Cyrillic;
break;
case FX_CODEPAGE_MSWin_Greek:
nCharset = FX_CHARSET_MSWin_Greek;
break;
case FX_CODEPAGE_MSWin_Turkish:
nCharset = FX_CHARSET_MSWin_Turkish;
break;
case FX_CODEPAGE_MSWin_Hebrew:
nCharset = FX_CHARSET_MSWin_Hebrew;
break;
case FX_CODEPAGE_MSWin_Arabic:
nCharset = FX_CHARSET_MSWin_Arabic;
break;
case FX_CODEPAGE_MSWin_Baltic:
nCharset = FX_CHARSET_MSWin_Baltic;
break;
case FX_CODEPAGE_MSWin_Vietnamese:
nCharset = FX_CHARSET_MSWin_Vietnamese;
break;
case FX_CODEPAGE_Johab:
nCharset = FX_CHARSET_Johab;
break;
}
return nCharset;
}
const FPDF_CharsetFontMap CPWL_FontMap::defaultTTFMap[] = {
{FX_CHARSET_ANSI, "Helvetica"},
{FX_CHARSET_ChineseSimplified, "SimSun"},
{FX_CHARSET_ChineseTraditional, "MingLiU"},
{FX_CHARSET_ShiftJIS, "MS Gothic"},
{FX_CHARSET_Hangul, "Batang"},
{FX_CHARSET_MSWin_Cyrillic, "Arial"},
#if _FX_PLATFORM_ == _FX_PLATFORM_LINUX_ || _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
{FX_CHARSET_MSWin_EasternEuropean, "Arial"},
#else
{FX_CHARSET_MSWin_EasternEuropean, "Tahoma"},
#endif
{FX_CHARSET_MSWin_Arabic, "Arial"},
{-1, nullptr}};
ByteString CPWL_FontMap::GetDefaultFontByCharset(int32_t nCharset) {
int i = 0;
while (defaultTTFMap[i].charset != -1) {
if (nCharset == defaultTTFMap[i].charset)
return defaultTTFMap[i].fontname;
++i;
}
return "";
}
int32_t CPWL_FontMap::CharSetFromUnicode(uint16_t word, int32_t nOldCharset) {
// to avoid CJK Font to show ASCII
if (word < 0x7F)
return FX_CHARSET_ANSI;
// follow the old charset
if (nOldCharset != FX_CHARSET_Default)
return nOldCharset;
// find new charset
if ((word >= 0x4E00 && word <= 0x9FA5) ||
(word >= 0xE7C7 && word <= 0xE7F3) ||
(word >= 0x3000 && word <= 0x303F) ||
(word >= 0x2000 && word <= 0x206F)) {
return FX_CHARSET_ChineseSimplified;
}
if (((word >= 0x3040) && (word <= 0x309F)) ||
((word >= 0x30A0) && (word <= 0x30FF)) ||
((word >= 0x31F0) && (word <= 0x31FF)) ||
((word >= 0xFF00) && (word <= 0xFFEF))) {
return FX_CHARSET_ShiftJIS;
}
if (((word >= 0xAC00) && (word <= 0xD7AF)) ||
((word >= 0x1100) && (word <= 0x11FF)) ||
((word >= 0x3130) && (word <= 0x318F))) {
return FX_CHARSET_Hangul;
}
if (word >= 0x0E00 && word <= 0x0E7F)
return FX_CHARSET_Thai;
if ((word >= 0x0370 && word <= 0x03FF) || (word >= 0x1F00 && word <= 0x1FFF))
return FX_CHARSET_MSWin_Greek;
if ((word >= 0x0600 && word <= 0x06FF) || (word >= 0xFB50 && word <= 0xFEFC))
return FX_CHARSET_MSWin_Arabic;
if (word >= 0x0590 && word <= 0x05FF)
return FX_CHARSET_MSWin_Hebrew;
if (word >= 0x0400 && word <= 0x04FF)
return FX_CHARSET_MSWin_Cyrillic;
if (word >= 0x0100 && word <= 0x024F)
return FX_CHARSET_MSWin_EasternEuropean;
if (word >= 0x1E00 && word <= 0x1EFF)
return FX_CHARSET_MSWin_Vietnamese;
return FX_CHARSET_ANSI;
}