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WIP - add hyperlinks to pages within pdf

This commit is contained in:
Roberto Fernandez Bautista 2022-06-23 23:29:48 +01:00 committed by Jeff Young
parent e7920bdda4
commit 3cd867e656
2 changed files with 52 additions and 3 deletions
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48
common/plotters/PDF_plotter.cpp
View File

@ -720,6 +720,7 @@ void PDF_PLOTTER::ClosePage()
std::vector<int> hyperlinkHandles;
// Write out all hyperlinks for the page as annotation links
/*
for( const std::pair<BOX2I, wxString>& linkPair : m_urlHyperlinks )
{
const BOX2I& box = linkPair.first;
@ -738,8 +739,27 @@ void PDF_PLOTTER::ClosePage()
bottomLeft.x, bottomLeft.y, topRight.x, topRight.y,
encodeStringForPlotter( url ).c_str() );
closePdfObject();
}
}*/
// Write out all "goto" hyperlinks for the page as link annotations (compatible with pdf 1.0)
for( const std::pair<BOX2I, wxString>& linkPair : m_urlHyperlinksInPage )
{
const BOX2I& box = linkPair.first;
const wxString& url = linkPair.second;
VECTOR2D bottomLeft = iuToPdfUserSpace( box.GetPosition() );
VECTOR2D topRight = iuToPdfUserSpace( box.GetEnd() );
BOX2D userSpaceBox;
userSpaceBox.SetOrigin( bottomLeft );
userSpaceBox.SetEnd( topRight );
hyperlinkHandles.push_back( startPdfObject() );
m_urlHyperlinksHandles.insert( { hyperlinkHandles.back(), { userSpaceBox, url } } );
}
//
// TODO use allocPdfObject() !!
int hyperLinkArrayHandle = -1;
// If we have added any annotation links, create an array containing all the objects
@ -786,6 +806,9 @@ void PDF_PLOTTER::ClosePage()
// Mark the page stream as idle
m_pageStreamHandle = 0;
//
m_urlHyperlinksInPage.clear();
}
@ -796,6 +819,8 @@ bool PDF_PLOTTER::StartPlot()
// First things first: the customary null object
m_xrefTable.clear();
m_xrefTable.push_back( 0 );
m_urlHyperlinksInPage.clear();
m_urlHyperlinksHandles.clear();
/* The header (that's easy!). The second line is binary junk required
to make the file binary from the beginning (the important thing is
@ -870,6 +895,25 @@ bool PDF_PLOTTER::EndPlot()
fputs( ">>\n", m_outputFile );
closePdfObject();
for( const std::pair<int,std::pair<BOX2D, wxString>>& handlePair : m_urlHyperlinksHandles )
{
const int& linkhandle = handlePair.first;
const std::pair<BOX2D, wxString>& linkpair = handlePair.second;
const BOX2D& box = linkpair.first;
const wxString& url = linkpair.second;
startPdfObject( linkhandle );
fprintf( m_outputFile,
"<< /Type /Annot\n"
" /Subtype /Link\n"
" /Rect[%g %g %g %g] /Border[16 16 1]\n"
" /Dest [%d 0 R] >>\n" // /D [3 0 R /FitR –4 399 199 533]
">>\n",
box.GetLeft(), box.GetBottom(), box.GetRight(), box.GetTop(), m_pageHandles[0] );
closePdfObject();
}
/* The page tree: it's a B-tree but luckily we only have few pages!
So we use just an array... The handle was allocated at the beginning,
now we instantiate the corresponding object */
@ -1014,6 +1058,6 @@ void PDF_PLOTTER::Text( const VECTOR2I& aPos,
void PDF_PLOTTER::HyperlinkBoxURL( const BOX2I& aBox, const wxString& aDestinationURL )
{
m_urlHyperlinks.push_back( std::make_pair( aBox, aDestinationURL ) );
m_urlHyperlinksInPage.push_back( std::make_pair( aBox, aDestinationURL ) );
}

7
include/plotters/plotters_pslike.h
View File

@ -416,7 +416,12 @@ protected:
wxString m_workFilename;
FILE* m_workFile; ///< Temporary file to construct the stream before zipping
std::vector<long> m_xrefTable; ///< The PDF xref offset table
std::vector<std::pair<BOX2I, wxString>> m_urlHyperlinks; ///< List of loaded URLs so far
///< List of loaded URLs in current page
std::vector<std::pair<BOX2I, wxString>> m_urlHyperlinksInPage;
///< Handles for all the hyperlink objects that will be deferred
std::map<int, std::pair<BOX2D, wxString>> m_urlHyperlinksHandles;
};