mirror of
https://github.com/qpdf/qpdf.git
synced 2024-12-22 19:08:59 +00:00
111 lines
3.6 KiB
C++
111 lines
3.6 KiB
C++
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <iostream>
|
|
#include <stdlib.h>
|
|
#include <qpdf/QPDF.hh>
|
|
#include <qpdf/QPDFPageDocumentHelper.hh>
|
|
#include <qpdf/QPDFAcroFormDocumentHelper.hh>
|
|
#include <qpdf/QPDFWriter.hh>
|
|
#include <qpdf/QUtil.hh>
|
|
|
|
static char const* whoami = 0;
|
|
|
|
void usage()
|
|
{
|
|
std::cerr << "Usage: " << whoami << " infile.pdf outfile.pdf value"
|
|
<< std::endl
|
|
<< "Set the value of all text fields to a specified value"
|
|
<< std::endl;
|
|
exit(2);
|
|
}
|
|
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
whoami = QUtil::getWhoami(argv[0]);
|
|
|
|
// For libtool's sake....
|
|
if (strncmp(whoami, "lt-", 3) == 0)
|
|
{
|
|
whoami += 3;
|
|
}
|
|
|
|
if (argc != 4)
|
|
{
|
|
usage();
|
|
}
|
|
|
|
char const* infilename = argv[1];
|
|
char const* outfilename = argv[2];
|
|
char const* value = argv[3];
|
|
|
|
// This is a contrived example that just goes through a file page
|
|
// by page and sets the value of any text fields it finds to a
|
|
// fixed value as given on the command line. The purpose here is
|
|
// to illustrate use of the helper classes around interactive
|
|
// forms.
|
|
|
|
try
|
|
{
|
|
QPDF qpdf;
|
|
qpdf.processFile(infilename);
|
|
|
|
// We will iterate through form fields by starting at the page
|
|
// level and looking at each field for each page. We could
|
|
// also called QPDFAcroFormDocumentHelper::getFormFields to
|
|
// iterate at the field level, but doing it as below
|
|
// illustrates how we can map from annotations to fields.
|
|
|
|
QPDFAcroFormDocumentHelper afdh(qpdf);
|
|
QPDFPageDocumentHelper pdh(qpdf);
|
|
std::vector<QPDFPageObjectHelper> pages = pdh.getAllPages();
|
|
for (std::vector<QPDFPageObjectHelper>::iterator page_iter =
|
|
pages.begin();
|
|
page_iter != pages.end(); ++page_iter)
|
|
{
|
|
// Get all widget annotations for each page. Widget
|
|
// annotations are the ones that contain the details of
|
|
// what's in a form field.
|
|
std::vector<QPDFAnnotationObjectHelper> annotations =
|
|
afdh.getWidgetAnnotationsForPage(*page_iter);
|
|
for (std::vector<QPDFAnnotationObjectHelper>::iterator annot_iter =
|
|
annotations.begin();
|
|
annot_iter != annotations.end(); ++annot_iter)
|
|
{
|
|
// For each annotation, find its associated field. If
|
|
// it's a text field, set its value. This will
|
|
// automatically update the document to indicate that
|
|
// appearance streams need to be regenerated. At the
|
|
// time of this writing, qpdf doesn't have any helper
|
|
// code to assist with appearance stream generation,
|
|
// though there's nothing that prevents it from being
|
|
// possible.
|
|
QPDFFormFieldObjectHelper ffh =
|
|
afdh.getFieldForAnnotation(*annot_iter);
|
|
if (ffh.getFieldType() == "/Tx")
|
|
{
|
|
// Set the value. This will automatically set
|
|
// /NeedAppearances to true. If you don't want to
|
|
// do that, pass false as the second argument. For
|
|
// details see comments in
|
|
// QPDFFormFieldObjectHelper.hh.
|
|
ffh.setV(value);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Write out a new file
|
|
QPDFWriter w(qpdf, outfilename);
|
|
w.setStaticID(true); // for testing only
|
|
w.write();
|
|
}
|
|
catch (std::exception &e)
|
|
{
|
|
std::cerr << whoami << " processing file " << infilename << ": "
|
|
<< e.what() << std::endl;
|
|
exit(2);
|
|
}
|
|
|
|
return 0;
|
|
}
|