mirror of
https://github.com/pdf2htmlEX/pdf2htmlEX.git
synced 2024-09-17 21:16:03 +00:00
335 lines
9.5 KiB
C++
335 lines
9.5 KiB
C++
/*
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* link.cc
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*
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* Handling links
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*
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* by WangLu
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* 2012.09.25
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*/
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#include <iostream>
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#include <sstream>
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#include <algorithm>
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#include <HTMLRenderer.h>
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#include <Link.h>
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#include "namespace.h"
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namespace pdf2htmlEX {
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using std::ostringstream;
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using std::min;
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using std::max;
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static void _transform(const double * ctm, double & x, double & y)
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{
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double xx = x, yy = y;
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x = ctm[0] * xx + ctm[2] * yy + ctm[4];
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y = ctm[1] * xx + ctm[3] * yy + ctm[5];
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}
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static void _get_transformed_rect(AnnotLink * link, const double * ctm, double & x1, double & y1, double & x2, double & y2)
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{
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double _x1, _x2, _y1, _y2;
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link->getRect(&_x1, &_y1, &_x2, &_y2);
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_transform(ctm, _x1, _y1);
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_transform(ctm, _x2, _y2);
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x1 = min(_x1, _x2);
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x2 = max(_x1, _x2);
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y1 = min(_y1, _y2);
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y2 = max(_y1, _y2);
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}
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/*
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* In PDF, edges of the rectangle are in the middle of the borders
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* In HTML, edges are completely outside the rectangle
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*/
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static void _fix_border_width(double & x1, double & y1, double & x2, double & y2,
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double border_width, double & border_top_bottom_width, double & border_left_right_width)
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{
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double w = x2 - x1;
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if(w > border_width)
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{
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x1 += border_width / 2;
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x2 -= border_width / 2;
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border_left_right_width = border_width;
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}
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else
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{
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x1 += w / 2;
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x2 -= w / 2;
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border_left_right_width = border_width + w/2;
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}
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double h = y2 - y1;
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if(h > border_width)
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{
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y1 += border_width / 2;
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y2 -= border_width / 2;
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border_top_bottom_width = border_width;
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}
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else
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{
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y1 += h / 2;
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y2 -= h / 2;
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border_top_bottom_width = border_width + h/2;
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}
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}
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/*
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* The detailed rectangle area of the link destination
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* Will be parsed and performed by Javascript
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*/
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static string get_dest_detail_str(int pageno, LinkDest * dest)
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{
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ostringstream sout;
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// dec
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sout << "[" << pageno;
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if(dest)
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{
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switch(dest->getKind())
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{
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case destXYZ:
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{
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sout << ",\"XYZ\",";
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if(dest->getChangeLeft())
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sout << (dest->getLeft());
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else
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sout << "null";
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sout << ",";
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if(dest->getChangeTop())
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sout << (dest->getTop());
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else
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sout << "null";
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sout << ",";
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if(dest->getChangeZoom())
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sout << (dest->getZoom());
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else
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sout << "null";
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}
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break;
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case destFit:
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sout << ",\"Fit\"";
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break;
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case destFitH:
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sout << ",\"FitH\",";
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if(dest->getChangeTop())
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sout << (dest->getTop());
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else
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sout << "null";
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break;
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case destFitV:
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sout << ",\"FitV\",";
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if(dest->getChangeLeft())
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sout << (dest->getLeft());
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else
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sout << "null";
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break;
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case destFitR:
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sout << ",\"FitR\","
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<< (dest->getLeft()) << ","
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<< (dest->getBottom()) << ","
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<< (dest->getRight()) << ","
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<< (dest->getTop());
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break;
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case destFitB:
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sout << ",\"FitB\"";
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break;
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case destFitBH:
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sout << ",\"FitBH\",";
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if(dest->getChangeTop())
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sout << (dest->getTop());
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else
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sout << "null";
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break;
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case destFitBV:
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sout << ",\"FitBV\",";
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if(dest->getChangeLeft())
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sout << (dest->getLeft());
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else
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sout << "null";
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break;
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default:
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break;
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}
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}
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sout << "]";
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return sout.str();
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}
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/*
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* Based on pdftohtml from poppler
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* TODO: CSS for link rectangles
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*/
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void HTMLRenderer::processLink(AnnotLink * al)
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{
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std::string dest_str, dest_detail_str;
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auto action = al->getAction();
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if(action)
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{
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auto kind = action->getKind();
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switch(kind)
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{
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case actionGoTo:
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{
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auto catalog = cur_doc->getCatalog();
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auto * real_action = dynamic_cast<LinkGoTo*>(action);
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LinkDest * dest = nullptr;
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if(auto _ = real_action->getDest())
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dest = _->copy();
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else if (auto _ = real_action->getNamedDest())
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dest = catalog->findDest(_);
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if(dest)
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{
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int pageno = 0;
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if(dest->isPageRef())
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{
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auto pageref = dest->getPageRef();
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pageno = catalog->findPage(pageref.num, pageref.gen);
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}
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else
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{
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pageno = dest->getPageNum();
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}
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if(pageno > 0)
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{
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dest_str = (char*)str_fmt("#p%x", pageno);
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dest_detail_str = get_dest_detail_str(pageno, dest);
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}
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delete dest;
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}
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}
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break;
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case actionGoToR:
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{
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cerr << "TODO: actionGoToR is not implemented." << endl;
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}
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break;
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case actionURI:
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{
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auto * real_action = dynamic_cast<LinkURI*>(action);
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dest_str = real_action->getURI()->getCString();
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}
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break;
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case actionLaunch:
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{
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cerr << "TODO: actionLaunch is not implemented." << endl;
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}
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break;
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default:
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cerr << "Warning: unknown annotation type: " << kind << endl;
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break;
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}
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}
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if(dest_str != "")
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{
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html_fout << "<a class=\"a\" href=\"" << dest_str << "\"";
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if(dest_detail_str != "")
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html_fout << " data-dest-detail='" << dest_detail_str << "'";
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html_fout << ">";
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}
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html_fout << "<div style=\"";
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double x1, y1, x2, y2;
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_get_transformed_rect(al, default_ctm, x1, y1, x2, y2);
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double border_width = 0;
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double border_top_bottom_width = 0;
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double border_left_right_width = 0;
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auto * border = al->getBorder();
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if(border)
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{
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border_width = border->getWidth() * (param->zoom);
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if(border_width > 0)
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{
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{
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_fix_border_width(x1, y1, x2, y1,
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border_width, border_top_bottom_width, border_left_right_width);
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if(abs(border_top_bottom_width - border_left_right_width) < EPS)
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html_fout << "border-width:" << _round(border_top_bottom_width) << "px;";
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else
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html_fout << "border-width:" << _round(border_top_bottom_width) << "px " << _round(border_left_right_width) << "px;";
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}
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auto style = border->getStyle();
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switch(style)
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{
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case AnnotBorder::borderSolid:
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html_fout << "border-style:solid;";
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break;
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case AnnotBorder::borderDashed:
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html_fout << "border-style:dashed;";
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break;
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case AnnotBorder::borderBeveled:
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html_fout << "border-style:outset;";
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break;
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case AnnotBorder::borderInset:
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html_fout << "border-style:inset;";
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break;
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case AnnotBorder::borderUnderlined:
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html_fout << "border-style:none;border-bottom-style:solid;";
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break;
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default:
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cerr << "Warning:Unknown annotation border style: " << style << endl;
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html_fout << "border-style:solid;";
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}
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auto color = al->getColor();
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double r,g,b;
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if(color && (color->getSpace() == AnnotColor::colorRGB))
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{
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const double * v = color->getValues();
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r = v[0];
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g = v[1];
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b = v[2];
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}
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else
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{
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r = g = b = 0;
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}
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html_fout << "border-color:rgb("
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<< dec << (int)dblToByte(r) << "," << (int)dblToByte(g) << "," << (int)dblToByte(b) << hex
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<< ");";
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}
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else
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{
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html_fout << "border-style:none;";
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}
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}
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else
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{
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html_fout << "border-style:none;";
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}
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html_fout << "position:absolute;"
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<< "left:" << _round(x1- border_left_right_width) << "px;"
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<< "bottom:" << _round(y1 - border_top_bottom_width) << "px;"
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<< "width:" << _round(x2-x1) << "px;"
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<< "height:" << _round(y2-y1) << "px;";
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// fix for IE
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html_fout << "background-color:rgba(255,255,255,0.000001);";
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html_fout << "\"></div>";
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if(dest_str != "")
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{
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html_fout << "</a>";
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}
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}
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}// namespace pdf2htmlEX
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