433 lines
14 KiB
C++
433 lines
14 KiB
C++
// Copyright 2014 The PDFium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fpdfdoc/cpdf_bafontmap.h"
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#include <memory>
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#include <utility>
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#include "constants/annotation_common.h"
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#include "core/fpdfapi/font/cpdf_font.h"
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#include "core/fpdfapi/font/cpdf_fontencoding.h"
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#include "core/fpdfapi/page/cpdf_docpagedata.h"
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#include "core/fpdfapi/page/cpdf_page.h"
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#include "core/fpdfapi/parser/cpdf_dictionary.h"
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#include "core/fpdfapi/parser/cpdf_document.h"
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#include "core/fpdfapi/parser/cpdf_parser.h"
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#include "core/fpdfapi/parser/cpdf_reference.h"
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#include "core/fpdfapi/parser/cpdf_stream.h"
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#include "core/fpdfapi/parser/fpdf_parser_utility.h"
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#include "core/fpdfdoc/cpdf_defaultappearance.h"
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#include "core/fpdfdoc/cpdf_formfield.h"
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#include "core/fpdfdoc/ipvt_fontmap.h"
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#include "core/fxcrt/fx_codepage.h"
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#include "core/fxcrt/stl_util.h"
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#include "core/fxge/cfx_fontmapper.h"
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#include "core/fxge/cfx_fontmgr.h"
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#include "core/fxge/cfx_gemodule.h"
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namespace {
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bool FindNativeTrueTypeFont(ByteStringView sFontFaceName) {
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CFX_FontMgr* pFontMgr = CFX_GEModule::Get()->GetFontMgr();
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CFX_FontMapper* pFontMapper = pFontMgr->GetBuiltinMapper();
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pFontMapper->LoadInstalledFonts();
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return pFontMapper->HasInstalledFont(sFontFaceName) ||
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pFontMapper->HasLocalizedFont(sFontFaceName);
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}
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RetainPtr<CPDF_Font> AddNativeTrueTypeFontToPDF(CPDF_Document* pDoc,
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ByteString sFontFaceName,
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FX_Charset nCharset) {
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if (!pDoc)
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return nullptr;
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auto pFXFont = std::make_unique<CFX_Font>();
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pFXFont->LoadSubst(sFontFaceName, true, 0, 0, 0,
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FX_GetCodePageFromCharset(nCharset), false);
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auto* pDocPageData = CPDF_DocPageData::FromDocument(pDoc);
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return pDocPageData->AddFont(std::move(pFXFont), nCharset);
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}
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ByteString EncodeFontAlias(ByteString sFontName, FX_Charset nCharset) {
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sFontName.Remove(' ');
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sFontName += ByteString::Format("_%02X", nCharset);
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return sFontName;
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}
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} // namespace
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CPDF_BAFontMap::Data::Data() = default;
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CPDF_BAFontMap::Data::~Data() = default;
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CPDF_BAFontMap::CPDF_BAFontMap(CPDF_Document* pDocument,
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RetainPtr<CPDF_Dictionary> pAnnotDict,
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const ByteString& sAPType)
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: m_pDocument(pDocument),
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m_pAnnotDict(std::move(pAnnotDict)),
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m_sAPType(sAPType) {
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FX_Charset nCharset = FX_Charset::kDefault;
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m_pDefaultFont = GetAnnotDefaultFont(&m_sDefaultFontName);
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if (m_pDefaultFont) {
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auto maybe_charset = m_pDefaultFont->GetSubstFontCharset();
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if (maybe_charset.has_value()) {
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nCharset = maybe_charset.value();
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} else if (m_sDefaultFontName == "Wingdings" ||
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m_sDefaultFontName == "Wingdings2" ||
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m_sDefaultFontName == "Wingdings3" ||
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m_sDefaultFontName == "Webdings") {
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nCharset = FX_Charset::kSymbol;
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} else {
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nCharset = FX_Charset::kANSI;
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}
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AddFontData(m_pDefaultFont, m_sDefaultFontName, nCharset);
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AddFontToAnnotDict(m_pDefaultFont, m_sDefaultFontName);
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}
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if (nCharset != FX_Charset::kANSI)
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GetFontIndex(CFX_Font::kDefaultAnsiFontName, FX_Charset::kANSI, false);
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}
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CPDF_BAFontMap::~CPDF_BAFontMap() = default;
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RetainPtr<CPDF_Font> CPDF_BAFontMap::GetPDFFont(int32_t nFontIndex) {
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if (fxcrt::IndexInBounds(m_Data, nFontIndex))
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return m_Data[nFontIndex]->pFont;
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return nullptr;
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}
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ByteString CPDF_BAFontMap::GetPDFFontAlias(int32_t nFontIndex) {
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if (fxcrt::IndexInBounds(m_Data, nFontIndex))
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return m_Data[nFontIndex]->sFontName;
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return ByteString();
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}
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int32_t CPDF_BAFontMap::GetWordFontIndex(uint16_t word,
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FX_Charset nCharset,
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int32_t nFontIndex) {
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if (nFontIndex > 0) {
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if (KnowWord(nFontIndex, word))
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return nFontIndex;
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} else {
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if (!m_Data.empty()) {
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const Data* pData = m_Data.front().get();
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if (nCharset == FX_Charset::kDefault ||
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pData->nCharset == FX_Charset::kSymbol ||
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nCharset == pData->nCharset) {
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if (KnowWord(0, word))
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return 0;
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}
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}
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}
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int32_t nNewFontIndex =
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GetFontIndex(GetCachedNativeFontName(nCharset), nCharset, true);
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if (nNewFontIndex >= 0) {
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if (KnowWord(nNewFontIndex, word))
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return nNewFontIndex;
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}
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nNewFontIndex = GetFontIndex(CFX_Font::kUniversalDefaultFontName,
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FX_Charset::kDefault, false);
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if (nNewFontIndex >= 0) {
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if (KnowWord(nNewFontIndex, word))
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return nNewFontIndex;
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}
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return -1;
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}
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int32_t CPDF_BAFontMap::CharCodeFromUnicode(int32_t nFontIndex, uint16_t word) {
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if (!fxcrt::IndexInBounds(m_Data, nFontIndex))
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return -1;
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Data* pData = m_Data[nFontIndex].get();
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if (!pData->pFont)
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return -1;
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if (pData->pFont->IsUnicodeCompatible())
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return pData->pFont->CharCodeFromUnicode(word);
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return word < 0xFF ? word : -1;
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}
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FX_Charset CPDF_BAFontMap::CharSetFromUnicode(uint16_t word,
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FX_Charset nOldCharset) {
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// to avoid CJK Font to show ASCII
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if (word < 0x7F)
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return FX_Charset::kANSI;
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// follow the old charset
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if (nOldCharset != FX_Charset::kDefault)
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return nOldCharset;
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return CFX_Font::GetCharSetFromUnicode(word);
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}
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FX_Charset CPDF_BAFontMap::GetNativeCharset() {
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return FX_GetCharsetFromCodePage(FX_GetACP());
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}
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RetainPtr<CPDF_Font> CPDF_BAFontMap::FindFontSameCharset(ByteString* sFontAlias,
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FX_Charset nCharset) {
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if (m_pAnnotDict->GetNameFor(pdfium::annotation::kSubtype) != "Widget")
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return nullptr;
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const CPDF_Dictionary* pRootDict = m_pDocument->GetRoot();
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if (!pRootDict)
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return nullptr;
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RetainPtr<const CPDF_Dictionary> pAcroFormDict =
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pRootDict->GetDictFor("AcroForm");
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if (!pAcroFormDict)
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return nullptr;
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RetainPtr<const CPDF_Dictionary> pDRDict = pAcroFormDict->GetDictFor("DR");
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if (!pDRDict)
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return nullptr;
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return FindResFontSameCharset(pDRDict.Get(), sFontAlias, nCharset);
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}
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RetainPtr<CPDF_Font> CPDF_BAFontMap::FindResFontSameCharset(
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const CPDF_Dictionary* pResDict,
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ByteString* sFontAlias,
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FX_Charset nCharset) {
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if (!pResDict)
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return nullptr;
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RetainPtr<const CPDF_Dictionary> pFonts = pResDict->GetDictFor("Font");
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if (!pFonts)
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return nullptr;
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RetainPtr<CPDF_Font> pFind;
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CPDF_DictionaryLocker locker(pFonts);
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for (const auto& it : locker) {
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const ByteString& csKey = it.first;
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RetainPtr<CPDF_Dictionary> pElement =
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ToDictionary(it.second->GetMutableDirect());
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if (!ValidateDictType(pElement.Get(), "Font"))
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continue;
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auto* pData = CPDF_DocPageData::FromDocument(m_pDocument);
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RetainPtr<CPDF_Font> pFont = pData->GetFont(std::move(pElement));
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if (!pFont)
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continue;
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auto maybe_charset = pFont->GetSubstFontCharset();
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if (maybe_charset.has_value() && maybe_charset.value() == nCharset) {
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*sFontAlias = csKey;
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pFind = std::move(pFont);
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}
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}
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return pFind;
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}
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RetainPtr<CPDF_Font> CPDF_BAFontMap::GetAnnotDefaultFont(ByteString* sAlias) {
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RetainPtr<CPDF_Dictionary> pAcroFormDict;
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const bool bWidget =
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(m_pAnnotDict->GetNameFor(pdfium::annotation::kSubtype) == "Widget");
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if (bWidget) {
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RetainPtr<CPDF_Dictionary> pRootDict = m_pDocument->GetMutableRoot();
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if (pRootDict)
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pAcroFormDict = pRootDict->GetMutableDictFor("AcroForm");
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}
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ByteString sDA;
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RetainPtr<const CPDF_Object> pObj =
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CPDF_FormField::GetFieldAttrForDict(m_pAnnotDict.Get(), "DA");
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if (pObj)
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sDA = pObj->GetString();
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if (bWidget) {
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if (sDA.IsEmpty()) {
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pObj = CPDF_FormField::GetFieldAttrForDict(pAcroFormDict.Get(), "DA");
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sDA = pObj ? pObj->GetString() : ByteString();
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}
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}
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if (sDA.IsEmpty())
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return nullptr;
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CPDF_DefaultAppearance appearance(sDA);
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float font_size;
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absl::optional<ByteString> font = appearance.GetFont(&font_size);
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*sAlias = font.value_or(ByteString());
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RetainPtr<CPDF_Dictionary> pFontDict;
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if (RetainPtr<CPDF_Dictionary> pAPDict =
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m_pAnnotDict->GetMutableDictFor(pdfium::annotation::kAP)) {
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if (RetainPtr<CPDF_Dictionary> pNormalDict =
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pAPDict->GetMutableDictFor("N")) {
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if (RetainPtr<CPDF_Dictionary> pNormalResDict =
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pNormalDict->GetMutableDictFor("Resources")) {
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if (RetainPtr<CPDF_Dictionary> pResFontDict =
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pNormalResDict->GetMutableDictFor("Font")) {
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pFontDict = pResFontDict->GetMutableDictFor(*sAlias);
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}
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}
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}
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}
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if (bWidget && !pFontDict && pAcroFormDict) {
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if (RetainPtr<CPDF_Dictionary> pDRDict =
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pAcroFormDict->GetMutableDictFor("DR")) {
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if (RetainPtr<CPDF_Dictionary> pDRFontDict =
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pDRDict->GetMutableDictFor("Font")) {
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pFontDict = pDRFontDict->GetMutableDictFor(*sAlias);
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}
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}
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}
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if (!pFontDict)
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return nullptr;
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return CPDF_DocPageData::FromDocument(m_pDocument)->GetFont(pFontDict);
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}
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void CPDF_BAFontMap::AddFontToAnnotDict(const RetainPtr<CPDF_Font>& pFont,
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const ByteString& sAlias) {
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if (!pFont)
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return;
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RetainPtr<CPDF_Dictionary> pAPDict =
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m_pAnnotDict->GetOrCreateDictFor(pdfium::annotation::kAP);
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// to avoid checkbox and radiobutton
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if (ToDictionary(pAPDict->GetObjectFor(m_sAPType)))
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return;
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RetainPtr<CPDF_Stream> pStream = pAPDict->GetMutableStreamFor(m_sAPType);
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if (!pStream) {
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pStream = m_pDocument->NewIndirect<CPDF_Stream>();
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pAPDict->SetNewFor<CPDF_Reference>(m_sAPType, m_pDocument,
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pStream->GetObjNum());
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}
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RetainPtr<CPDF_Dictionary> pStreamDict = pStream->GetMutableDict();
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if (!pStreamDict) {
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pStreamDict = m_pDocument->New<CPDF_Dictionary>();
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pStream->InitStreamWithEmptyData(pStreamDict);
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}
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RetainPtr<CPDF_Dictionary> pStreamResList =
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pStreamDict->GetOrCreateDictFor("Resources");
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RetainPtr<CPDF_Dictionary> pStreamResFontList =
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pStreamResList->GetMutableDictFor("Font");
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if (!pStreamResFontList) {
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pStreamResFontList = m_pDocument->NewIndirect<CPDF_Dictionary>();
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pStreamResList->SetNewFor<CPDF_Reference>("Font", m_pDocument,
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pStreamResFontList->GetObjNum());
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}
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if (!pStreamResFontList->KeyExist(sAlias)) {
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RetainPtr<const CPDF_Dictionary> pFontDict = pFont->GetFontDict();
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RetainPtr<CPDF_Object> pObject =
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pFontDict->IsInline() ? pFontDict->Clone()
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: pFontDict->MakeReference(m_pDocument);
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pStreamResFontList->SetFor(sAlias, std::move(pObject));
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}
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}
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bool CPDF_BAFontMap::KnowWord(int32_t nFontIndex, uint16_t word) {
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return fxcrt::IndexInBounds(m_Data, nFontIndex) &&
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CharCodeFromUnicode(nFontIndex, word) >= 0;
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}
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int32_t CPDF_BAFontMap::GetFontIndex(const ByteString& sFontName,
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FX_Charset nCharset,
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bool bFind) {
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int32_t nFontIndex = FindFont(EncodeFontAlias(sFontName, nCharset), nCharset);
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if (nFontIndex >= 0)
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return nFontIndex;
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ByteString sAlias;
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RetainPtr<CPDF_Font> pFont =
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bFind ? FindFontSameCharset(&sAlias, nCharset) : nullptr;
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if (!pFont) {
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pFont = AddFontToDocument(sFontName, nCharset);
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sAlias = EncodeFontAlias(sFontName, nCharset);
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}
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AddFontToAnnotDict(pFont, sAlias);
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return AddFontData(pFont, sAlias, nCharset);
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}
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int32_t CPDF_BAFontMap::AddFontData(const RetainPtr<CPDF_Font>& pFont,
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const ByteString& sFontAlias,
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FX_Charset nCharset) {
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auto pNewData = std::make_unique<Data>();
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pNewData->pFont = pFont;
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pNewData->sFontName = sFontAlias;
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pNewData->nCharset = nCharset;
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m_Data.push_back(std::move(pNewData));
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return fxcrt::CollectionSize<int32_t>(m_Data) - 1;
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}
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int32_t CPDF_BAFontMap::FindFont(const ByteString& sFontName,
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FX_Charset nCharset) {
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int32_t i = 0;
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for (const auto& pData : m_Data) {
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if ((nCharset == FX_Charset::kDefault || nCharset == pData->nCharset) &&
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(sFontName.IsEmpty() || pData->sFontName == sFontName)) {
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return i;
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}
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++i;
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}
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return -1;
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}
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ByteString CPDF_BAFontMap::GetNativeFontName(FX_Charset nCharset) {
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if (nCharset == FX_Charset::kDefault)
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nCharset = GetNativeCharset();
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ByteString sFontName = CFX_Font::GetDefaultFontNameByCharset(nCharset);
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if (!FindNativeTrueTypeFont(sFontName.AsStringView()))
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return ByteString();
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return sFontName;
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}
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ByteString CPDF_BAFontMap::GetCachedNativeFontName(FX_Charset nCharset) {
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for (const auto& pData : m_NativeFont) {
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if (pData && pData->nCharset == nCharset)
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return pData->sFontName;
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}
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ByteString sNew = GetNativeFontName(nCharset);
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if (sNew.IsEmpty())
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return ByteString();
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auto pNewData = std::make_unique<Native>();
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pNewData->nCharset = nCharset;
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pNewData->sFontName = sNew;
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m_NativeFont.push_back(std::move(pNewData));
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return sNew;
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}
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RetainPtr<CPDF_Font> CPDF_BAFontMap::AddFontToDocument(ByteString sFontName,
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FX_Charset nCharset) {
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if (CFX_FontMapper::IsStandardFontName(sFontName))
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return AddStandardFont(sFontName);
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return AddSystemFont(sFontName, nCharset);
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}
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RetainPtr<CPDF_Font> CPDF_BAFontMap::AddStandardFont(ByteString sFontName) {
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auto* pPageData = CPDF_DocPageData::FromDocument(m_pDocument);
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if (sFontName == "ZapfDingbats")
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return pPageData->AddStandardFont(sFontName, nullptr);
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static const CPDF_FontEncoding fe(FontEncoding::kWinAnsi);
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return pPageData->AddStandardFont(sFontName, &fe);
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}
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RetainPtr<CPDF_Font> CPDF_BAFontMap::AddSystemFont(ByteString sFontName,
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FX_Charset nCharset) {
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if (sFontName.IsEmpty())
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sFontName = GetNativeFontName(nCharset);
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if (nCharset == FX_Charset::kDefault)
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nCharset = GetNativeCharset();
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return AddNativeTrueTypeFontToPDF(m_pDocument, sFontName, nCharset);
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}
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