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Implementation of optional content in content processor (without XObjects)

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This commit is contained in:
Jakub Melka
2019-07-04 17:52:38 +02:00
parent e04222fb0b
commit 584211bf36
15 changed files with 623 additions and 37 deletions
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33
PdfForQtLib/sources/pdfparser.cpp
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@ -641,8 +641,8 @@ PDFParser::PDFParser(const QByteArray& data, PDFParsingContext* context, Feature
m_lexicalAnalyzer(data.constData(), data.constData() + data.size()),
m_features(features)
{
m_lookAhead1 = m_lexicalAnalyzer.fetch();
m_lookAhead2 = m_lexicalAnalyzer.fetch();
m_lookAhead1 = fetch();
m_lookAhead2 = fetch();
}
PDFParser::PDFParser(const char* begin, const char* end, PDFParsingContext* context, Features features) :
@ -650,8 +650,18 @@ PDFParser::PDFParser(const char* begin, const char* end, PDFParsingContext* cont
m_lexicalAnalyzer(begin, end),
m_features(features)
{
m_lookAhead1 = m_lexicalAnalyzer.fetch();
m_lookAhead2 = m_lexicalAnalyzer.fetch();
m_lookAhead1 = fetch();
m_lookAhead2 = fetch();
}
PDFParser::PDFParser(std::function<PDFLexicalAnalyzer::Token ()> tokenFetcher) :
m_tokenFetcher(qMove(tokenFetcher)),
m_context(nullptr),
m_lexicalAnalyzer(nullptr, nullptr),
m_features(None)
{
m_lookAhead1 = fetch();
m_lookAhead2 = fetch();
}
PDFObject PDFParser::getObject()
@ -837,8 +847,8 @@ PDFObject PDFParser::getObject()
}
// Refill lookahead tokens
m_lookAhead1 = m_lexicalAnalyzer.fetch();
m_lookAhead2 = m_lexicalAnalyzer.fetch();
m_lookAhead1 = fetch();
m_lookAhead2 = fetch();
if (m_lookAhead1.type == PDFLexicalAnalyzer::TokenType::Command &&
m_lookAhead1.data.toByteArray() == PDF_STREAM_END_COMMAND)
@ -902,8 +912,8 @@ void PDFParser::seek(PDFInteger offset)
m_lexicalAnalyzer.seek(offset);
// We must read lookahead symbols, because we invalidated them
m_lookAhead1 = m_lexicalAnalyzer.fetch();
m_lookAhead2 = m_lexicalAnalyzer.fetch();
m_lookAhead1 = fetch();
m_lookAhead2 = fetch();
}
bool PDFParser::fetchCommand(const char* command)
@ -921,7 +931,12 @@ bool PDFParser::fetchCommand(const char* command)
void PDFParser::shift()
{
m_lookAhead1 = std::move(m_lookAhead2);
m_lookAhead2 = m_lexicalAnalyzer.fetch();
m_lookAhead2 = fetch();
}
PDFLexicalAnalyzer::Token PDFParser::fetch()
{
return m_tokenFetcher ? m_tokenFetcher() : m_lexicalAnalyzer.fetch();
}
} // namespace pdf