320 lines
8.8 KiB
C++
320 lines
8.8 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 <Link.h>
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#include "HTMLRenderer.h"
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#include "util/namespace.h"
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#include "util/math.h"
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#include "util/misc.h"
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#include "util/encoding.h"
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#include "util/css_const.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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using std::cerr;
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using std::endl;
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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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* The string will be put into a HTML attribute, surrounded by single quotes
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* So pay attention to the characters used here
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*/
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static string get_linkdest_detail_str(
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LinkDest * dest, // borrow the caller's std::unique_ptr
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Catalog * catalog,
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int & pageno
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)
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{
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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);
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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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return "";
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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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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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sout << "]";
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return sout.str();
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}
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string HTMLRenderer::get_linkaction_str(
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const LinkAction * action,
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string & detail
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)
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{
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string dest_str;
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detail = "";
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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 * real_action =
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dynamic_cast<const LinkGoTo*>(action);
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std::unique_ptr<LinkDest> dest = nullptr;
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if(auto _ = real_action->getDest())
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dest = std::make_unique<LinkDest>(*_);
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else if (auto _ = real_action->getNamedDest())
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dest = cur_catalog->findDest(_);
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if(dest)
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{
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int pageno = 0;
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detail = get_linkdest_detail_str(
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dest.get(), cur_catalog, pageno
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);
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if(pageno > 0)
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{
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dest_str = (char*)str_fmt(
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"#%s%x", CSS::PAGE_FRAME_CN, pageno
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);
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}
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dest.reset();
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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<const LinkURI*>(action);
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assert(real_action != nullptr);
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dest_str = real_action->getURI();
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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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return dest_str;
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}
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/*
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* Based on pdftohtml from poppler
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* TODO: share rectangle draw with css-draw
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*/
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void HTMLRenderer::processLink(AnnotLink * al)
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{
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string dest_detail_str;
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string dest_str = get_linkaction_str(al->getAction(), dest_detail_str);
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if(!dest_str.empty())
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{
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(*f_curpage) << "<a class=\"" << CSS::LINK_CN << "\" href=\"";
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writeAttribute((*f_curpage), dest_str);
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(*f_curpage) << "\"";
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if(!dest_detail_str.empty())
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(*f_curpage) << " data-dest-detail='" << dest_detail_str << "'";
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(*f_curpage) << ">";
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}
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(*f_curpage) << "<div class=\"" << CSS::CSS_DRAW_CN << ' ' << CSS::TRANSFORM_MATRIX_CN
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<< all_manager.transform_matrix.install(default_ctm)
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<< "\" style=\"";
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double x,y,w,h;
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double x1, y1, x2, y2;
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al->getRect(&x1, &y1, &x2, &y2);
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x = min<double>(x1, x2);
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y = min<double>(y1, y2);
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w = max<double>(x1, x2) - x;
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h = max<double>(y1, y2) - y;
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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();
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if(border_width > 0)
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{
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{
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css_fix_rectangle_border_width(x1, y1, x2, y2, border_width,
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x, y, w, h,
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border_top_bottom_width, border_left_right_width);
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if(std::abs(border_top_bottom_width - border_left_right_width) < EPS)
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(*f_curpage) << "border-width:" << round(border_top_bottom_width) << "px;";
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else
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(*f_curpage) << "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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(*f_curpage) << "border-style:solid;";
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break;
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case AnnotBorder::borderDashed:
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(*f_curpage) << "border-style:dashed;";
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break;
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case AnnotBorder::borderBeveled:
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(*f_curpage) << "border-style:outset;";
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break;
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case AnnotBorder::borderInset:
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(*f_curpage) << "border-style:inset;";
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break;
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case AnnotBorder::borderUnderlined:
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(*f_curpage) << "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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(*f_curpage) << "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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(*f_curpage) << "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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(*f_curpage) << "border-style:none;";
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}
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}
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else
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{
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(*f_curpage) << "border-style:none;";
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}
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tm_transform(default_ctm, x, y);
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(*f_curpage) << "position:absolute;"
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<< "left:" << round(x) << "px;"
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<< "bottom:" << round(y) << "px;"
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<< "width:" << round(w) << "px;"
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<< "height:" << round(h) << "px;";
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// fix for IE
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(*f_curpage) << "background-color:rgba(255,255,255,0.000001);";
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(*f_curpage) << "\"></div>";
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if(dest_str != "")
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{
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(*f_curpage) << "</a>";
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}
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}
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}// namespace pdf2htmlEX
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