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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/formfiller/cba_fontmap.h"
#include <memory>
#include <utility>
#include "core/fpdfapi/font/cpdf_font.h"
#include "core/fpdfapi/page/cpdf_page.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/fpdf_parser_utility.h"
#include "core/fpdfdoc/cpdf_defaultappearance.h"
#include "core/fpdfdoc/cpdf_formfield.h"
#include "core/fxge/cfx_substfont.h"
#include "fpdfsdk/cpdfsdk_annot.h"
CBA_FontMap::CBA_FontMap(CPDFSDK_Annot* pAnnot,
CFX_SystemHandler* pSystemHandler)
: CPWL_FontMap(pSystemHandler),
m_pDocument(pAnnot->GetPDFPage()->GetDocument()),
m_pAnnotDict(pAnnot->GetPDFAnnot()->GetAnnotDict()) {
Initialize();
}
CBA_FontMap::~CBA_FontMap() {}
void CBA_FontMap::Reset() {
Empty();
m_pDefaultFont = nullptr;
m_sDefaultFontName.clear();
}
void CBA_FontMap::Initialize() {
int32_t nCharset = FX_CHARSET_Default;
if (!m_pDefaultFont) {
m_pDefaultFont = GetAnnotDefaultFont(&m_sDefaultFontName);
if (m_pDefaultFont) {
if (const CFX_SubstFont* pSubstFont = m_pDefaultFont->GetSubstFont()) {
nCharset = pSubstFont->m_Charset;
} else {
if (m_sDefaultFontName == "Wingdings" ||
m_sDefaultFontName == "Wingdings2" ||
m_sDefaultFontName == "Wingdings3" ||
m_sDefaultFontName == "Webdings")
nCharset = FX_CHARSET_Symbol;
else
nCharset = FX_CHARSET_ANSI;
}
AddFontData(m_pDefaultFont.Get(), m_sDefaultFontName, nCharset);
AddFontToAnnotDict(m_pDefaultFont.Get(), m_sDefaultFontName);
}
}
if (nCharset != FX_CHARSET_ANSI)
CPWL_FontMap::Initialize();
}
void CBA_FontMap::SetDefaultFont(CPDF_Font* pFont,
const ByteString& sFontName) {
ASSERT(pFont);
if (m_pDefaultFont)
return;
m_pDefaultFont = pFont;
m_sDefaultFontName = sFontName;
int32_t nCharset = FX_CHARSET_Default;
if (const CFX_SubstFont* pSubstFont = m_pDefaultFont->GetSubstFont())
nCharset = pSubstFont->m_Charset;
AddFontData(m_pDefaultFont.Get(), m_sDefaultFontName, nCharset);
}
CPDF_Font* CBA_FontMap::FindFontSameCharset(ByteString* sFontAlias,
int32_t nCharset) {
if (m_pAnnotDict->GetStringFor("Subtype") != "Widget")
return nullptr;
CPDF_Document* pDocument = GetDocument();
const CPDF_Dictionary* pRootDict = pDocument->GetRoot();
if (!pRootDict)
return nullptr;
const CPDF_Dictionary* pAcroFormDict = pRootDict->GetDictFor("AcroForm");
if (!pAcroFormDict)
return nullptr;
const CPDF_Dictionary* pDRDict = pAcroFormDict->GetDictFor("DR");
if (!pDRDict)
return nullptr;
return FindResFontSameCharset(pDRDict, sFontAlias, nCharset);
}
CPDF_Document* CBA_FontMap::GetDocument() {
return m_pDocument.Get();
}
CPDF_Font* CBA_FontMap::FindResFontSameCharset(const CPDF_Dictionary* pResDict,
ByteString* sFontAlias,
int32_t nCharset) {
if (!pResDict)
return nullptr;
const CPDF_Dictionary* pFonts = pResDict->GetDictFor("Font");
if (!pFonts)
return nullptr;
CPDF_Document* pDocument = GetDocument();
CPDF_Font* pFind = nullptr;
for (const auto& it : *pFonts) {
const ByteString& csKey = it.first;
if (!it.second)
continue;
CPDF_Dictionary* pElement = ToDictionary(it.second->GetDirect());
if (!pElement)
continue;
if (pElement->GetStringFor("Type") != "Font")
continue;
CPDF_Font* pFont = pDocument->LoadFont(pElement);
if (!pFont)
continue;
const CFX_SubstFont* pSubst = pFont->GetSubstFont();
if (!pSubst)
continue;
if (pSubst->m_Charset == nCharset) {
*sFontAlias = csKey;
pFind = pFont;
}
}
return pFind;
}
void CBA_FontMap::AddedFont(CPDF_Font* pFont, const ByteString& sFontAlias) {
AddFontToAnnotDict(pFont, sFontAlias);
}
void CBA_FontMap::AddFontToAnnotDict(CPDF_Font* pFont,
const ByteString& sAlias) {
if (!pFont)
return;
CPDF_Dictionary* pAPDict = m_pAnnotDict->GetDictFor("AP");
if (!pAPDict)
pAPDict = m_pAnnotDict->SetNewFor<CPDF_Dictionary>("AP");
// to avoid checkbox and radiobutton
if (ToDictionary(pAPDict->GetObjectFor(m_sAPType)))
return;
CPDF_Stream* pStream = pAPDict->GetStreamFor(m_sAPType);
if (!pStream) {
pStream = m_pDocument->NewIndirect<CPDF_Stream>();
pAPDict->SetFor(m_sAPType, pStream->MakeReference(m_pDocument.Get()));
}
CPDF_Dictionary* pStreamDict = pStream->GetDict();
if (!pStreamDict) {
auto pOwnedDict =
pdfium::MakeUnique<CPDF_Dictionary>(m_pDocument->GetByteStringPool());
pStreamDict = pOwnedDict.get();
pStream->InitStream({}, std::move(pOwnedDict));
}
CPDF_Dictionary* pStreamResList = pStreamDict->GetDictFor("Resources");
if (!pStreamResList)
pStreamResList = pStreamDict->SetNewFor<CPDF_Dictionary>("Resources");
CPDF_Dictionary* pStreamResFontList = pStreamResList->GetDictFor("Font");
if (!pStreamResFontList) {
pStreamResFontList = m_pDocument->NewIndirect<CPDF_Dictionary>();
pStreamResList->SetFor(
"Font", pStreamResFontList->MakeReference(m_pDocument.Get()));
}
if (!pStreamResFontList->KeyExist(sAlias)) {
CPDF_Dictionary* pFontDict = pFont->GetFontDict();
std::unique_ptr<CPDF_Object> pObject =
pFontDict->IsInline() ? pFontDict->Clone()
: pFontDict->MakeReference(m_pDocument.Get());
pStreamResFontList->SetFor(sAlias, std::move(pObject));
}
}
CPDF_Font* CBA_FontMap::GetAnnotDefaultFont(ByteString* sAlias) {
CPDF_Dictionary* pAcroFormDict = nullptr;
const bool bWidget = (m_pAnnotDict->GetStringFor("Subtype") == "Widget");
if (bWidget) {
CPDF_Dictionary* pRootDict = m_pDocument->GetRoot();
if (pRootDict)
pAcroFormDict = pRootDict->GetDictFor("AcroForm");
}
ByteString sDA;
const CPDF_Object* pObj = FPDF_GetFieldAttr(m_pAnnotDict.Get(), "DA");
if (pObj)
sDA = pObj->GetString();
if (bWidget) {
if (sDA.IsEmpty()) {
pObj = FPDF_GetFieldAttr(pAcroFormDict, "DA");
sDA = pObj ? pObj->GetString() : ByteString();
}
}
if (sDA.IsEmpty())
return nullptr;
CPDF_DefaultAppearance appearance(sDA);
float font_size;
Optional<ByteString> font = appearance.GetFont(&font_size);
*sAlias = font.value_or(ByteString());
CPDF_Dictionary* pFontDict = nullptr;
if (CPDF_Dictionary* pAPDict = m_pAnnotDict->GetDictFor("AP")) {
if (CPDF_Dictionary* pNormalDict = pAPDict->GetDictFor("N")) {
if (CPDF_Dictionary* pNormalResDict =
pNormalDict->GetDictFor("Resources")) {
if (CPDF_Dictionary* pResFontDict = pNormalResDict->GetDictFor("Font"))
pFontDict = pResFontDict->GetDictFor(*sAlias);
}
}
}
if (bWidget && !pFontDict && pAcroFormDict) {
if (CPDF_Dictionary* pDRDict = pAcroFormDict->GetDictFor("DR")) {
if (CPDF_Dictionary* pDRFontDict = pDRDict->GetDictFor("Font"))
pFontDict = pDRFontDict->GetDictFor(*sAlias);
}
}
return pFontDict ? m_pDocument->LoadFont(pFontDict) : nullptr;
}
void CBA_FontMap::SetAPType(const ByteString& sAPType) {
m_sAPType = sAPType;
Reset();
Initialize();
}
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