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// Copyright 2017 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 "xfa/fgas/font/cfgas_pdffontmgr.h"
#include <algorithm>
#include "core/fpdfapi/font/cpdf_font.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "xfa/fgas/font/cfgas_fontmgr.h"
#include "xfa/fgas/font/cfgas_gefont.h"
namespace {
// The 5 names per entry are: PsName, Normal, Bold, Italic, BoldItalic.
const char* const g_XFAPDFFontName[][5] = {
{"Adobe PI Std", "AdobePIStd", "AdobePIStd", "AdobePIStd", "AdobePIStd"},
{"Myriad Pro Light", "MyriadPro-Light", "MyriadPro-Semibold",
"MyriadPro-LightIt", "MyriadPro-SemiboldIt"},
};
} // namespace
CFGAS_PDFFontMgr::CFGAS_PDFFontMgr(CPDF_Document* pDoc, CFGAS_FontMgr* pFontMgr)
: m_pDoc(pDoc), m_pFontMgr(pFontMgr) {
ASSERT(pDoc);
ASSERT(pFontMgr);
}
CFGAS_PDFFontMgr::~CFGAS_PDFFontMgr() {}
RetainPtr<CFGAS_GEFont> CFGAS_PDFFontMgr::FindFont(const ByteString& strPsName,
bool bBold,
bool bItalic,
CPDF_Font** pDstPDFFont,
bool bStrictMatch) {
CPDF_Dictionary* pFontSetDict =
m_pDoc->GetRoot()->GetDictFor("AcroForm")->GetDictFor("DR");
if (!pFontSetDict)
return nullptr;
pFontSetDict = pFontSetDict->GetDictFor("Font");
if (!pFontSetDict)
return nullptr;
ByteString name = strPsName;
name.Remove(' ');
for (const auto& it : *pFontSetDict) {
const ByteString& key = it.first;
CPDF_Object* pObj = it.second.get();
if (!PsNameMatchDRFontName(name.AsStringView(), bBold, bItalic, key,
bStrictMatch)) {
continue;
}
CPDF_Dictionary* pFontDict = ToDictionary(pObj->GetDirect());
if (!pFontDict || pFontDict->GetStringFor("Type") != "Font")
return nullptr;
CPDF_Font* pPDFFont = m_pDoc->LoadFont(pFontDict);
if (!pPDFFont)
return nullptr;
if (!pPDFFont->IsEmbedded()) {
*pDstPDFFont = pPDFFont;
return nullptr;
}
return CFGAS_GEFont::LoadFont(pPDFFont->GetFont(), m_pFontMgr.Get());
}
return nullptr;
}
RetainPtr<CFGAS_GEFont> CFGAS_PDFFontMgr::GetFont(
const WideStringView& wsFontFamily,
uint32_t dwFontStyles,
CPDF_Font** pPDFFont,
bool bStrictMatch) {
uint32_t dwHashCode = FX_HashCode_GetW(wsFontFamily, false);
ByteString strKey = ByteString::Format("%u%u", dwHashCode, dwFontStyles);
auto it = m_FontMap.find(strKey);
if (it != m_FontMap.end())
return it->second;
ByteString bsPsName = ByteString::FromUnicode(WideString(wsFontFamily));
bool bBold = FontStyleIsBold(dwFontStyles);
bool bItalic = FontStyleIsItalic(dwFontStyles);
ByteString strFontName = PsNameToFontName(bsPsName, bBold, bItalic);
RetainPtr<CFGAS_GEFont> pFont =
FindFont(strFontName, bBold, bItalic, pPDFFont, bStrictMatch);
if (pFont)
m_FontMap[strKey] = pFont;
return pFont;
}
ByteString CFGAS_PDFFontMgr::PsNameToFontName(const ByteString& strPsName,
bool bBold,
bool bItalic) {
for (size_t i = 0; i < FX_ArraySize(g_XFAPDFFontName); ++i) {
if (strPsName == g_XFAPDFFontName[i][0]) {
size_t index = 1;
if (bBold)
++index;
if (bItalic)
index += 2;
return g_XFAPDFFontName[i][index];
}
}
return strPsName;
}
bool CFGAS_PDFFontMgr::PsNameMatchDRFontName(const ByteStringView& bsPsName,
bool bBold,
bool bItalic,
const ByteString& bsDRFontName,
bool bStrictMatch) {
ByteString bsDRName = bsDRFontName;
bsDRName.Remove('-');
size_t iPsLen = bsPsName.GetLength();
auto nIndex = bsDRName.Find(bsPsName);
if (nIndex.has_value() && !bStrictMatch)
return true;
if (!nIndex.has_value() || nIndex.value() != 0)
return false;
size_t iDifferLength = bsDRName.GetLength() - iPsLen;
if (iDifferLength > 1 || (bBold || bItalic)) {
auto iBoldIndex = bsDRName.Find("Bold");
if (bBold != iBoldIndex.has_value())
return false;
if (iBoldIndex.has_value()) {
iDifferLength = std::min(iDifferLength - 4,
bsDRName.GetLength() - iBoldIndex.value() - 4);
}
bool bItalicFont = true;
if (bsDRName.Contains("Italic"))
iDifferLength -= 6;
else if (bsDRName.Contains("It"))
iDifferLength -= 2;
else if (bsDRName.Contains("Oblique"))
iDifferLength -= 7;
else
bItalicFont = false;
if (bItalic != bItalicFont)
return false;
if (iDifferLength > 1) {
ByteString bsDRTailer = bsDRName.Right(iDifferLength);
if (bsDRTailer == "MT" || bsDRTailer == "PSMT" ||
bsDRTailer == "Regular" || bsDRTailer == "Reg") {
return true;
}
if (iBoldIndex.has_value() || bItalicFont)
return false;
bool bMatch = false;
switch (bsPsName[iPsLen - 1]) {
case 'L':
if (bsDRName.Right(5) == "Light")
bMatch = true;
break;
case 'R':
if (bsDRName.Right(7) == "Regular" || bsDRName.Right(3) == "Reg")
bMatch = true;
break;
case 'M':
if (bsDRName.Right(5) == "Medium")
bMatch = true;
break;
default:
break;
}
return bMatch;
}
}
return true;
}
bool CFGAS_PDFFontMgr::GetCharWidth(const RetainPtr<CFGAS_GEFont>& pFont,
wchar_t wUnicode,
int32_t* pWidth) {
if (wUnicode != 0x20)
return false;
auto it = m_FDE2PDFFont.find(pFont);
if (it == m_FDE2PDFFont.end())
return false;
CPDF_Font* pPDFFont = it->second;
// TODO(npm): CFGAS_GEFont::GetCharWidth currently uses -1 as a special value,
// so |pWidth| cannot be changed to unsigned until this behavior is changed.
*pWidth = static_cast<int32_t>(
pPDFFont->GetCharWidthF(pPDFFont->CharCodeFromUnicode(wUnicode)));
return true;
}
void CFGAS_PDFFontMgr::SetFont(const RetainPtr<CFGAS_GEFont>& pFont,
CPDF_Font* pPDFFont) {
m_FDE2PDFFont[pFont] = pPDFFont;
}
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