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// Copyright 2017 The PDFium Authors
// 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/fpdfapi/font/cpdf_fontglobals.h"
#include <utility>
#include "core/fpdfapi/cmaps/CNS1/cmaps_cns1.h"
#include "core/fpdfapi/cmaps/GB1/cmaps_gb1.h"
#include "core/fpdfapi/cmaps/Japan1/cmaps_japan1.h"
#include "core/fpdfapi/cmaps/Korea1/cmaps_korea1.h"
#include "core/fpdfapi/font/cfx_stockfontarray.h"
#include "core/fpdfapi/font/cpdf_cid2unicodemap.h"
#include "core/fpdfapi/font/cpdf_cmap.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "third_party/base/check.h"
#include "third_party/base/containers/contains.h"
namespace {
CPDF_FontGlobals* g_FontGlobals = nullptr;
RetainPtr<const CPDF_CMap> LoadPredefinedCMap(ByteStringView name) {
if (!name.IsEmpty() && name[0] == '/')
name = name.Last(name.GetLength() - 1);
return pdfium::MakeRetain<CPDF_CMap>(name);
}
} // namespace
// static
void CPDF_FontGlobals::Create() {
DCHECK(!g_FontGlobals);
g_FontGlobals = new CPDF_FontGlobals();
}
// static
void CPDF_FontGlobals::Destroy() {
DCHECK(g_FontGlobals);
delete g_FontGlobals;
g_FontGlobals = nullptr;
}
// static
CPDF_FontGlobals* CPDF_FontGlobals::GetInstance() {
DCHECK(g_FontGlobals);
return g_FontGlobals;
}
CPDF_FontGlobals::CPDF_FontGlobals() {
memset(m_EmbeddedCharsets, 0, sizeof(m_EmbeddedCharsets));
memset(m_EmbeddedToUnicodes, 0, sizeof(m_EmbeddedToUnicodes));
}
CPDF_FontGlobals::~CPDF_FontGlobals() = default;
void CPDF_FontGlobals::LoadEmbeddedMaps() {
LoadEmbeddedGB1CMaps();
LoadEmbeddedCNS1CMaps();
LoadEmbeddedJapan1CMaps();
LoadEmbeddedKorea1CMaps();
}
RetainPtr<CPDF_Font> CPDF_FontGlobals::Find(
CPDF_Document* pDoc,
CFX_FontMapper::StandardFont index) {
auto it = m_StockMap.find(pDoc);
if (it == m_StockMap.end() || !it->second)
return nullptr;
return it->second->GetFont(index);
}
void CPDF_FontGlobals::Set(CPDF_Document* pDoc,
CFX_FontMapper::StandardFont index,
RetainPtr<CPDF_Font> pFont) {
UnownedPtr<CPDF_Document> pKey(pDoc);
if (!pdfium::Contains(m_StockMap, pKey))
m_StockMap[pKey] = std::make_unique<CFX_StockFontArray>();
m_StockMap[pKey]->SetFont(index, std::move(pFont));
}
void CPDF_FontGlobals::Clear(CPDF_Document* pDoc) {
// Avoid constructing smart-pointer key as erase() doesn't invoke
// transparent lookup in the same way find() does.
auto it = m_StockMap.find(pDoc);
if (it != m_StockMap.end())
m_StockMap.erase(it);
}
void CPDF_FontGlobals::LoadEmbeddedGB1CMaps() {
SetEmbeddedCharset(CIDSET_GB1, pdfium::make_span(fxcmap::kGB1_cmaps,
fxcmap::kGB1_cmaps_size));
SetEmbeddedToUnicode(CIDSET_GB1, fxcmap::kGB1CID2Unicode_5);
}
void CPDF_FontGlobals::LoadEmbeddedCNS1CMaps() {
SetEmbeddedCharset(CIDSET_CNS1, pdfium::make_span(fxcmap::kCNS1_cmaps,
fxcmap::kCNS1_cmaps_size));
SetEmbeddedToUnicode(CIDSET_CNS1, fxcmap::kCNS1CID2Unicode_5);
}
void CPDF_FontGlobals::LoadEmbeddedJapan1CMaps() {
SetEmbeddedCharset(
CIDSET_JAPAN1,
pdfium::make_span(fxcmap::kJapan1_cmaps, fxcmap::kJapan1_cmaps_size));
SetEmbeddedToUnicode(CIDSET_JAPAN1, fxcmap::kJapan1CID2Unicode_4);
}
void CPDF_FontGlobals::LoadEmbeddedKorea1CMaps() {
SetEmbeddedCharset(
CIDSET_KOREA1,
pdfium::make_span(fxcmap::kKorea1_cmaps, fxcmap::kKorea1_cmaps_size));
SetEmbeddedToUnicode(CIDSET_KOREA1, fxcmap::kKorea1CID2Unicode_2);
}
RetainPtr<const CPDF_CMap> CPDF_FontGlobals::GetPredefinedCMap(
const ByteString& name) {
auto it = m_CMaps.find(name);
if (it != m_CMaps.end())
return it->second;
RetainPtr<const CPDF_CMap> pCMap = LoadPredefinedCMap(name.AsStringView());
if (!name.IsEmpty())
m_CMaps[name] = pCMap;
return pCMap;
}
CPDF_CID2UnicodeMap* CPDF_FontGlobals::GetCID2UnicodeMap(CIDSet charset) {
if (!m_CID2UnicodeMaps[charset]) {
m_CID2UnicodeMaps[charset] = std::make_unique<CPDF_CID2UnicodeMap>(charset);
}
return m_CID2UnicodeMaps[charset].get();
}
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