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#include <cstdlib>
#include <iostream>
#include <qpdf/QIntC.hh>
#include <qpdf/QPDF.hh>
#include <qpdf/QPDFPageDocumentHelper.hh>
#include <qpdf/QPDFPageObjectHelper.hh>
#include <qpdf/QUtil.hh>
static char const* whoami = nullptr;
void
usage()
{
std::cerr << "Usage: " << whoami << " filename page-number\n"
<< "Prints a dump of the objects in the content streams of the given page.\n"
<< '\n'
<< "Pages are numbered from 1.\n";
exit(2);
}
class ParserCallbacks: public QPDFObjectHandle::ParserCallbacks
{
public:
~ParserCallbacks() override = default;
void contentSize(size_t) override;
void handleObject(QPDFObjectHandle, size_t offset, size_t length) override;
void handleEOF() override;
};
void
ParserCallbacks::contentSize(size_t size)
{
std::cout << "content size: " << size << '\n';
}
void
ParserCallbacks::handleObject(QPDFObjectHandle obj, size_t offset, size_t length)
{
std::cout << obj.getTypeName() << ", offset=" << offset << ", length=" << length << ": ";
if (obj.isInlineImage()) {
std::cout << QUtil::hex_encode(obj.getInlineImageValue()) << '\n';
} else {
std::cout << obj.unparse() << '\n';
}
}
void
ParserCallbacks::handleEOF()
{
std::cout << "-EOF-\n";
}
int
main(int argc, char* argv[])
{
whoami = QUtil::getWhoami(argv[0]);
if (argc != 3) {
usage();
}
char const* filename = argv[1];
int pageno = QUtil::string_to_int(argv[2]);
try {
QPDF pdf;
pdf.processFile(filename);
std::vector<QPDFPageObjectHelper> pages = QPDFPageDocumentHelper(pdf).getAllPages();
if ((pageno < 1) || (QIntC::to_size(pageno) > pages.size())) {
usage();
}
QPDFPageObjectHelper& page = pages.at(QIntC::to_size(pageno - 1));
ParserCallbacks cb;
page.parseContents(&cb);
} catch (std::exception& e) {
std::cerr << whoami << ": " << e.what() << '\n';
exit(2);
}
return 0;
}
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