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Tool for exporting internal format of PDF to xml file

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This commit is contained in:
Jakub Melka
2020-09-30 18:41:22 +02:00
parent 6ba8eabc34
commit a6163978bc
9 changed files with 402 additions and 5 deletions
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70
PdfForQtLib/sources/pdfencoding.cpp
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@ -18,6 +18,7 @@
#include "pdfencoding.h"
#include <QTimeZone>
#include <QTextCodec>
#include <cctype>
@ -2187,6 +2188,21 @@ bool PDFEncoding::canConvertToEncoding(const QString& string, PDFEncoding::Encod
return true;
}
bool PDFEncoding::canConvertFromEncoding(const QByteArray& stream, PDFEncoding::Encoding encoding)
{
const encoding::EncodingTable* table = getTableForEncoding(encoding);
for (const unsigned char index : stream)
{
QChar character = (*table)[index];
if (character == QChar(0xfffd))
{
return false;
}
}
return true;
}
QString PDFEncoding::convertTextString(const QByteArray& stream)
{
if (hasUnicodeLeadMarkings(stream))
@ -2333,6 +2349,60 @@ const encoding::EncodingTable* PDFEncoding::getTableForEncoding(Encoding encodin
return nullptr;
}
QString PDFEncoding::convertSmartFromByteStringToUnicode(const QByteArray& stream, bool* isBinary)
{
if (isBinary)
{
*isBinary = false;
}
if (hasUnicodeLeadMarkings(stream))
{
QTextCodec::ConverterState state = { };
{
QTextCodec* codec = QTextCodec::codecForName("UTF-16BE");
QString text = codec->toUnicode(stream.constData(), stream.length(), &state);
if (state.invalidChars == 0)
{
return text;
}
}
{
QTextCodec* codec = QTextCodec::codecForName("UTF-16LE");
QString text = codec->toUnicode(stream.constData(), stream.length(), &state);
if (state.invalidChars == 0)
{
return text;
}
}
}
if (hasUTF8LeadMarkings(stream))
{
QTextCodec::ConverterState state = { };
QTextCodec* codec = QTextCodec::codecForName("UTF-8");
QString text = codec->toUnicode(stream.constData(), stream.length(), &state);
if (state.invalidChars == 0)
{
return text;
}
}
if (canConvertFromEncoding(stream, Encoding::PDFDoc))
{
return convert(stream, Encoding::PDFDoc);
}
if (isBinary)
{
*isBinary = true;
}
return QString::fromLatin1(stream.toHex()).toUpper();
}
bool PDFEncoding::hasUnicodeLeadMarkings(const QByteArray& stream)
{
if (stream.size() >= 2)