utils/HtmlLinks.cc

//========================================================================
//
// This file comes from pdftohtml project
// http://pdftohtml.sourceforge.net
//
// Copyright from:
// Gueorgui Ovtcharov
// Rainer Dorsch <http://www.ra.informatik.uni-stuttgart.de/~rainer/>
// Mikhail Kruk <meshko@cs.brandeis.edu>
//
//========================================================================

//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2008 Boris Toloknov <tlknv@yandex.ru>
// Copyright (C) 2010 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2013 Julien Nabet <serval2412@yahoo.fr>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================

#include "HtmlLinks.h"

extern bool xml;

HtmlLink::HtmlLink(const HtmlLink& x){
  Xmin=x.Xmin;
  Ymin=x.Ymin;
  Xmax=x.Xmax;
  Ymax=x.Ymax;
  dest=new GooString(x.dest);
}

HtmlLink::HtmlLink(double xmin,double ymin,double xmax,double ymax,GooString * _dest)
{
   if (xmin < xmax) {
    Xmin=xmin;
    Xmax=xmax;
  } else {
    Xmin=xmax;
    Xmax=xmin;
  }
  if (ymin < ymax) {
    Ymin=ymin;
    Ymax=ymax;
  } else {
    Ymin=ymax;
    Ymax=ymin;
  }                    
  dest=new GooString(_dest);
}

HtmlLink::~HtmlLink(){
 delete dest;
}

bool HtmlLink::isEqualDest(const HtmlLink& x) const{
  return (!strcmp(dest->c_str(), x.dest->c_str()));
}

bool HtmlLink::inLink(double xmin,double ymin,double xmax,double ymax) const {
  double y=(ymin+ymax)/2;
  if (y>Ymax) return false;
  return (y>Ymin)&&(xmin<Xmax)&&(xmax>Xmin);
 }
  
static GooString* EscapeSpecialChars( GooString* s )
{
    GooString* tmp = nullptr;
    for( int i = 0, j = 0; i < s->getLength(); i++, j++ ){
        const char *replace = nullptr;
        switch ( s->getChar(i) ){
	        case '"': replace = "&quot;";  break;
	        case '&': replace = "&amp;";  break;
	        case '<': replace = "&lt;";  break;
	        case '>': replace = "&gt;";  break;
	        default: continue;
	    }
	    if( replace ){
	        if( !tmp ) tmp = new GooString( s );
	        if( tmp ){
	            tmp->del( j, 1 );
	            int l = strlen( replace );
	            tmp->insert( j, replace, l );
	            j += l - 1;
	        }
	    }
	}
	return tmp ? tmp : s;
}

GooString* HtmlLink::getLinkStart() {
  GooString *res = new GooString("<a href=\"");
  GooString *d = xml ? EscapeSpecialChars(dest) : dest;
  res->append( d );
  if( d != dest ) delete d;
  res->append("\">");
  return res;
}

/*GooString* HtmlLink::Link(GooString* content){
  //GooString* _dest=new GooString(dest);
  GooString *tmp=new GooString("<a href=\"");
  tmp->append(dest);
  tmp->append("\">");
  tmp->append(content);
  tmp->append("</a>");
  //delete _dest;
  return tmp;
  }*/

   

HtmlLinks::HtmlLinks(){
  accu=new std::vector<HtmlLink>();
}

HtmlLinks::~HtmlLinks(){
  delete accu;
  accu=nullptr; 
}

bool HtmlLinks::inLink(double xmin,double ymin,double xmax,double ymax,int& p)const {
  
  for(std::vector<HtmlLink>::iterator i=accu->begin();i!=accu->end();++i){
    if (i->inLink(xmin,ymin,xmax,ymax)) {
        p=(i - accu->begin());
        return 1;
    }
   }
  return 0;
}

HtmlLink* HtmlLinks::getLink(int i) const{
  return &(*accu)[i];
}