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tdegraphics/kviewshell/plugins/djvu/libdjvu/XMLParser.cpp

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//C- -*- C++ -*-
//C- -------------------------------------------------------------------
//C- DjVuLibre-3.5
//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.
//C- Copyright (c) 2001 AT&T
//C-
//C- This software is subject to, and may be distributed under, the
//C- GNU General Public License, Version 2. The license should have
//C- accompanied the software or you may obtain a copy of the license
//C- from the Free Software Foundation at http://www.fsf.org .
//C-
//C- This program is distributed in the hope that it will be useful,
//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//C- GNU General Public License for more details.
//C-
//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech
//C- Software authorized us to replace the original DjVu(r) Reference
//C- Library notice by the following text (see doc/lizard2002.djvu):
//C-
//C- ------------------------------------------------------------------
//C- | DjVu (r) Reference Library (v. 3.5)
//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
//C- | The DjVu Reference Library is protected by U.S. Pat. No.
//C- | 6,058,214 and patents pending.
//C- |
//C- | This software is subject to, and may be distributed under, the
//C- | GNU General Public License, Version 2. The license should have
//C- | accompanied the software or you may obtain a copy of the license
//C- | from the Free Software Foundation at http://www.fsf.org .
//C- |
//C- | The computer code originally released by LizardTech under this
//C- | license and unmodified by other parties is deemed "the LIZARDTECH
//C- | ORIGINAL CODE." Subject to any third party intellectual property
//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
//C- | non-exclusive license to make, use, sell, or otherwise dispose of
//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
//C- | General Public License. This grant only confers the right to
//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
//C- | the extent such infringement is reasonably necessary to enable
//C- | recipient to make, have made, practice, sell, or otherwise dispose
//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
//C- | any greater extent that may be necessary to utilize further
//C- | modifications or combinations.
//C- |
//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
//C- +------------------------------------------------------------------
//
// $Id: XMLParser.cpp,v 1.10 2003/11/07 22:08:22 leonb Exp $
// $Name: release_3_5_15 $
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma implementation
#endif
// From: Leon Bottou, 1/31/2002
// This is purely Lizardtech stuff.
#include "XMLParser.h"
#include "XMLTags.h"
#include "ByteStream.h"
#include "GOS.h"
#include "DjVuDocument.h"
#include "DjVuText.h"
#include "DjVuAnno.h"
#include "DjVuFile.h"
#include "DjVuImage.h"
#include "debug.h"
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#ifdef HAVE_NAMESPACES
namespace DJVU {
# ifdef NOT_DEFINED // Just to fool emacs c++ mode
}
#endif
#endif
static const char mimetype[]="image/x.djvu";
static const char bodytag[]="BODY";
static const char areatag[]="AREA";
static const char maptag[]="MAP";
static const char objecttag[]="OBJECT";
static const char paramtag[]="PARAM";
static const char wordtag[]="WORD";
static const char linetag[]="LINE";
static const char paragraphtag[]="PARAGRAPH";
static const char regiontag[]="REGION";
static const char pagecolumntag[]="PAGECOLUMN";
static const char hiddentexttag[]="HIDDENTEXT";
static const char metadatatag[]="METADATA";
class lt_XMLParser::Impl : public lt_XMLParser
{
public:
Impl(void);
virtual ~Impl();
/// Parse the specified bytestream.
virtual void parse(const GP<ByteStream> &bs);
/// Parse the specified tags - this one does all the work
virtual void parse(const lt_XMLTags &tags);
/// write to disk.
virtual void save(void);
/// erase.
virtual void empty(void);
protected:
GP<DjVuFile> get_file(const GURL &url,GUTF8String page);
void parse_anno(const int width, const int height,
const lt_XMLTags &GObject,
GMap<GUTF8String,GP<lt_XMLTags> > &Maps, DjVuFile &dfile);
void parse_text(const int width, const int height,
const lt_XMLTags &GObject, DjVuFile &dfile);
void parse_meta(const lt_XMLTags &GObject, DjVuFile &dfile);
void ChangeAnno( const int width, const int height,
DjVuFile &dfile, const lt_XMLTags &map);
void ChangeInfo(DjVuFile &dfile,const int dpi,const double gamma);
void ChangeText( const int width, const int height,
DjVuFile &dfile, const lt_XMLTags &map);
void ChangeMeta( DjVuFile &dfile, const lt_XMLTags &map);
void ChangeTextOCR( const GUTF8String &value,
const int width, const int height,
const GP<DjVuFile> &dfile);
// we may want to make these list of modified file static so
// they only needed to be loaded and saved once.
GMap<GUTF8String,GP<DjVuFile> > m_files;
GMap<GUTF8String,GP<DjVuDocument> > m_docs;
GURL m_codebase;
GCriticalSection xmlparser_lock;
};
static GP<ByteStream>
OCRcallback(
void * const xarg,
lt_XMLParser::mapOCRcallback * const xcallback,
const GUTF8String &value=GUTF8String(),
const GP<DjVuImage> &image=0 );
static inline GP<ByteStream>
OCRcallback(const GUTF8String &value, const GP<DjVuImage> &image)
{
return OCRcallback(0,0,value,image);
}
lt_XMLParser::lt_XMLParser() {}
lt_XMLParser::~lt_XMLParser() {}
lt_XMLParser::Impl::Impl() {}
lt_XMLParser::Impl::~Impl() {}
GP<lt_XMLParser>
lt_XMLParser::create(void)
{
return new lt_XMLParser::Impl;
}
// helper function for args
static void
intList(GUTF8String coords, GList<int> &retval)
{
int pos=0;
while(coords.length())
{
int epos;
unsigned long i=coords.toLong(pos,epos,10);
if(epos>=0)
{
retval.append(i);
const int n=coords.nextNonSpace(epos);
if(coords[n] != ',')
break;
pos=n+1;
}
}
}
void
lt_XMLParser::Impl::empty(void)
{
GCriticalSectionLock lock(&xmlparser_lock);
m_files.empty();
m_docs.empty();
}
void
lt_XMLParser::Impl::save(void)
{
GCriticalSectionLock lock(&xmlparser_lock);
for(GPosition pos=m_docs;pos;++pos)
{
const GP<DjVuDocument> doc(m_docs[pos]);
const GURL url=doc->get_init_url();
DEBUG_MSG("Saving "<<(const char *)url<<" with new text and annotations\n");
const bool bundle=doc->is_bundled()||(doc->get_doc_type()==DjVuDocument::SINGLE_PAGE);
doc->save_as(url,bundle);
}
empty();
}
void
lt_XMLParser::Impl::parse(const GP<ByteStream> &bs)
{
const GP<lt_XMLTags> tags(lt_XMLTags::create(bs));
parse(*tags);
}
static const GMap<GUTF8String,GMapArea::BorderType> &
BorderTypeMap(void)
{
static GMap<GUTF8String,GMapArea::BorderType> typeMap;
if (! typeMap.size())
{
typeMap["none"]=GMapArea::NO_BORDER;
typeMap["xor"]=GMapArea::XOR_BORDER;
typeMap["solid"]=GMapArea::SOLID_BORDER;
typeMap["default"]=GMapArea::SOLID_BORDER;
typeMap["shadowout"]=GMapArea::SHADOW_OUT_BORDER;
typeMap["shadowin"]=GMapArea::SHADOW_IN_BORDER;
typeMap["etchedin"]=GMapArea::SHADOW_EIN_BORDER;
typeMap["etchedout"]=GMapArea::SHADOW_EOUT_BORDER;
}
return typeMap;
}
static unsigned long
convertToColor(const GUTF8String &s)
{
unsigned long retval=0;
if(s.length())
{
int endpos;
if(s[0] == '#')
{
retval=s.substr(1,-1).toULong(0,endpos,16);
}
if(endpos < 0)
{
G_THROW( (ERR_MSG("XMLAnno.bad_color") "\t")+s );
}
}
return retval;
}
void
lt_XMLParser::Impl::ChangeInfo(DjVuFile &dfile,const int dpi,const double gamma)
{
GP<DjVuInfo> info;
if(dpi >= 5 && dpi <= 4800)
{
dfile.resume_decode(true);
if(dfile.info && (dpi != dfile.info->dpi) )
{
info=new DjVuInfo(*dfile.info);
info->dpi=dpi;
}
}
if(gamma >= 0.1 && gamma <= 5.0)
{
dfile.resume_decode(true);
if(dfile.info && (gamma != dfile.info->gamma) )
{
if(!info)
info=new DjVuInfo(*dfile.info);
info->gamma=gamma;
}
}
if(info)
{
dfile.change_info(info);
}
}
void
lt_XMLParser::Impl::ChangeAnno(
const int width, const int height,
DjVuFile &dfile,
const lt_XMLTags &map )
{
dfile.resume_decode(true);
const GP<DjVuInfo> info(dfile.info);
const GP<DjVuAnno> ganno(DjVuAnno::create());
DjVuAnno &anno=*ganno;
GPosition map_pos;
map_pos=map.contains(areatag);
if(dfile.contains_anno())
{
GP<ByteStream> annobs=dfile.get_merged_anno();
if(annobs)
{
anno.decode(annobs);
if(anno.ant && info)
{
anno.ant->map_areas.empty();
}
}
// dfile.remove_anno();
}
if(info && map_pos)
{
const int h=info->height;
const int w=info->width;
double ws=1.0;
double hs=1.0;
if(width && width != w)
{
ws=((double)w)/((double)width);
}
if(height && height != h)
{
hs=((double)h)/((double)height);
}
if(!anno.ant)
{
anno.ant=DjVuANT::create();
}
GPList<GMapArea> &map_areas=anno.ant->map_areas;
map_areas.empty();
GPList<lt_XMLTags> gareas=map[map_pos];
for(GPosition pos=gareas;pos;++pos)
{
if(gareas[pos])
{
lt_XMLTags &areas=*(gareas[pos]);
GMap<GUTF8String,GUTF8String> args(areas.get_args());
GList<int> coords;
// ******************************************************
// Parse the coords attribute: first read the raw data into
// a list, then scale the x, y data into another list. For
// circles, you also get a radius element with (looks like an x
// with no matching y).
// ******************************************************
{
GPosition coords_pos=args.contains("coords");
if(coords_pos)
{
GList<int> raw_coords;
intList(args[coords_pos],raw_coords);
for(GPosition raw_pos=raw_coords;raw_pos;++raw_pos)
{
const int r=raw_coords[raw_pos];
const int x=(int)(ws*(double)r+0.5);
coords.append(x);
int y=h-1;
if(! ++raw_pos)
{
y-=(int)(hs*(double)r+0.5);
}else
{
y-=(int)(hs*(double)raw_coords[raw_pos]+0.5);
}
coords.append(y);
// DjVuPrintMessage("Coords (%d,%d)\n",x,y);
}
}
}
GUTF8String shape;
{
GPosition shape_pos=args.contains("shape");
if(shape_pos)
{
shape=args[shape_pos];
}
}
GP<GMapArea> a;
if(shape == "default")
{
GRect rect(0,0,w,h);
a=GMapRect::create(rect);
}else if(!shape.length() || shape == "rect")
{
int xx[4];
int i=0;
for(GPosition rect_pos=coords;(rect_pos)&&(i<4);++rect_pos,++i)
{
xx[i]=coords[rect_pos];
}
if(i!=4)
{
G_THROW( ERR_MSG("XMLAnno.bad_rect") );
}
int xmin,xmax;
if(xx[0]>xx[2])
{
xmax=xx[0];
xmin=xx[2];
}else
{
xmin=xx[0];
xmax=xx[2];
}
int ymin,ymax;
if(xx[1]>xx[3])
{
ymax=xx[1];
ymin=xx[3];
}else
{
ymin=xx[1];
ymax=xx[3];
}
GRect rect(xmin,ymin,xmax-xmin,ymax-ymin);
a=GMapRect::create(rect);
}else if(shape == "circle")
{
int xx[4];
int i=0;
GPosition rect_pos=coords.lastpos();
if(rect_pos)
{
coords.append(coords[rect_pos]);
for(rect_pos=coords;(rect_pos)&&(i<4);++rect_pos)
{
xx[i++]=coords[rect_pos];
}
}
if(i!=4)
{
G_THROW( ERR_MSG("XMLAnno.bad_circle") );
}
int x=xx[0],y=xx[1],rx=xx[2],ry=(h-xx[3])-1;
GRect rect(x-rx,y-ry,2*rx,2*ry);
a=GMapOval::create(rect);
}else if(shape == "oval")
{
int xx[4];
int i=0;
for(GPosition rect_pos=coords;(rect_pos)&&(i<4);++rect_pos,++i)
{
xx[i]=coords[rect_pos];
}
if(i!=4)
{
G_THROW( ERR_MSG("XMLAnno.bad_oval") );
}
int xmin,xmax;
if(xx[0]>xx[2])
{
xmax=xx[0];
xmin=xx[2];
}else
{
xmin=xx[0];
xmax=xx[2];
}
int ymin,ymax;
if(xx[1]>xx[3])
{
ymax=xx[1];
ymin=xx[3];
}else
{
ymin=xx[1];
ymax=xx[3];
}
GRect rect(xmin,ymin,xmax-xmin,ymax-ymin);
a=GMapOval::create(rect);
}else if(shape == "poly")
{
GP<GMapPoly> p=GMapPoly::create();
for(GPosition poly_pos=coords;poly_pos;++poly_pos)
{
int x=coords[poly_pos];
if(! ++poly_pos)
break;
int y=coords[poly_pos];
p->add_vertex(x,y);
}
p->close_poly();
a=p;
}else
{
G_THROW( ( ERR_MSG("XMLAnno.unknown_shape") "\t")+shape );
}
if(a)
{
GPosition pos;
if((pos=args.contains("href")))
{
a->url=args[pos];
}
if((pos=args.contains("target")))
{
a->target=args[pos];
}
if((pos=args.contains("alt")))
{
a->comment=args[pos];
}
if((pos=args.contains("bordertype")))
{
GUTF8String b=args[pos];
static const GMap<GUTF8String,GMapArea::BorderType> typeMap=BorderTypeMap();
if((pos=typeMap.contains(b)))
{
a->border_type=typeMap[pos];
}else
{
G_THROW( (ERR_MSG("XMLAnno.unknown_border") "\t")+b );
}
}
a->border_always_visible=!!args.contains("visible");
if((pos=args.contains("bordercolor")))
{
a->border_color=convertToColor(args[pos]);
}
if((pos=args.contains("highlight")))
{
a->hilite_color=convertToColor(args[pos]);
}
if((pos=args.contains("border")))
{
a->border_width=args[pos].toInt(); //atoi(args[pos]);
}
map_areas.append(a);
}
}
}
}
dfile.set_modified(true);
dfile.anno=ByteStream::create();
anno.encode(dfile.anno);
}
GP<DjVuFile>
lt_XMLParser::Impl::get_file(const GURL &url,GUTF8String id)
{
GP<DjVuFile> dfile;
GP<DjVuDocument> doc;
GCriticalSectionLock lock(&xmlparser_lock);
{
GPosition pos=m_docs.contains(url.get_string());
if(pos)
{
doc=m_docs[pos];
}else
{
doc=DjVuDocument::create_wait(url);
if(! doc->wait_for_complete_init())
{
G_THROW(( ERR_MSG("XMLAnno.fail_init") "\t")+url.get_string() );
}
m_docs[url.get_string()]=doc;
}
if(id.is_int())
{
const int xpage=id.toInt(); //atoi((char const *)page);
if(xpage>0)
id=doc->page_to_id(xpage-1);
}else if(!id.length())
{
id=doc->page_to_id(0);
}
}
const GURL fileurl(doc->id_to_url(id));
GPosition dpos(m_files.contains(fileurl.get_string()));
if(!dpos)
{
if(!doc->get_id_list().contains(id))
{
G_THROW( ERR_MSG("XMLAnno.bad_page") );
}
dfile=doc->get_djvu_file(id,false);
if(!dfile)
{
G_THROW( ERR_MSG("XMLAnno.bad_page") );
}
m_files[fileurl.get_string()]=dfile;
}else
{
dfile=m_files[dpos];
}
return dfile;
}
void
lt_XMLParser::Impl::parse(const lt_XMLTags &tags)
{
const GPList<lt_XMLTags> Body(tags.get_Tags(bodytag));
GPosition pos=Body;
if(!pos || (pos != Body.lastpos()))
{
G_THROW( ERR_MSG("XMLAnno.extra_body") );
}
const GP<lt_XMLTags> GBody(Body[pos]);
if(!GBody)
{
G_THROW( ERR_MSG("XMLAnno.no_body") );
}
GMap<GUTF8String,GP<lt_XMLTags> > Maps;
lt_XMLTags::get_Maps(maptag,"name",Body,Maps);
const GPList<lt_XMLTags> Objects(GBody->get_Tags(objecttag));
lt_XMLTags::get_Maps(maptag,"name",Objects,Maps);
for(GPosition Objpos=Objects;Objpos;++Objpos)
{
lt_XMLTags &GObject=*Objects[Objpos];
// Map of attributes to value (e.g. "width" --> "500")
const GMap<GUTF8String,GUTF8String> &args=GObject.get_args();
GURL codebase;
{
DEBUG_MSG("Setting up codebase... m_codebase = " << m_codebase << "\n");
GPosition codebasePos=args.contains("codebase");
// If user specified a codebase attribute, assume it is correct (absolute URL):
// the GURL constructor will throw an exception if it isn't
if(codebasePos)
{
codebase=GURL::UTF8(args[codebasePos]);
}else if (m_codebase.is_dir())
{
codebase=m_codebase;
}else
{
codebase=GURL::Filename::UTF8(GOS::cwd());
}
DEBUG_MSG("codebase = " << codebase << "\n");
}
// the data attribute specifies the input file. This can be
// either an absolute URL (starts with file:/) or a relative
// URL (for now, just a path and file name). If it's absolute,
// our GURL will adequately wrap it. If it's relative, we need
// to use the codebase attribute to form an absolute URL first.
GPosition datapos=args.contains("data");
if(datapos)
{
bool isDjVuType=false;
GPosition typePos(args.contains("type"));
if(typePos)
{
if(args[typePos] != mimetype)
{
// DjVuPrintErrorUTF8("Ignoring %s Object tag\n",mimetype);
continue;
}
isDjVuType=true;
}
const GURL url=GURL::UTF8(args[datapos],(args[datapos][0] == '/')?codebase.base():codebase);
int width;
{
GPosition widthPos=args.contains("width");
width=(widthPos)?args[widthPos].toInt():0;
}
int height;
{
GPosition heightPos=args.contains("height");
height=(heightPos)?args[heightPos].toInt():0;
}
GUTF8String gamma;
GUTF8String dpi;
GUTF8String page;
GUTF8String do_ocr;
{
GPosition paramPos(GObject.contains(paramtag));
if(paramPos)
{
const GPList<lt_XMLTags> Params(GObject[paramPos]);
for(GPosition loc=Params;loc;++loc)
{
const GMap<GUTF8String,GUTF8String> &pargs=Params[loc]->get_args();
GPosition namepos=pargs.contains("name");
if(namepos)
{
GPosition valuepos=pargs.contains("value");
if(valuepos)
{
const GUTF8String name=pargs[namepos].downcase();
const GUTF8String &value=pargs[valuepos];
if(name == "flags")
{
GMap<GUTF8String,GUTF8String> args;
lt_XMLTags::ParseValues(value,args,true);
if(args.contains("page"))
{
page=args["page"];
}
if(args.contains("dpi"))
{
dpi=args["dpi"];
}
if(args.contains("gamma"))
{
gamma=args["gamma"];
}
if(args.contains("ocr"))
{
do_ocr=args["ocr"];
}
}else if(name == "page")
{
page=value;
}else if(name == "dpi")
{
dpi=value;
}else if(name == "gamma")
{
gamma=value;
}else if(name == "ocr")
{
do_ocr=value;
}
}
}
}
}
}
const GP<DjVuFile> dfile(get_file(url,page));
if(dpi.is_int() || gamma.is_float())
{
int pos=0;
ChangeInfo(*dfile,dpi.toInt(),gamma.toDouble(pos,pos));
}
parse_anno(width,height,GObject,Maps,*dfile);
parse_meta(GObject,*dfile);
parse_text(width,height,GObject,*dfile);
ChangeTextOCR(do_ocr,width,height,dfile);
}
}
}
void
lt_XMLParser::Impl::parse_anno(
const int width,
const int height,
const lt_XMLTags &GObject,
GMap<GUTF8String,GP<lt_XMLTags> > &Maps,
DjVuFile &dfile )
{
GP<lt_XMLTags> map;
{
GPosition usemappos=GObject.get_args().contains("usemap");
if(usemappos)
{
const GUTF8String mapname(GObject.get_args()[usemappos]);
GPosition mappos=Maps.contains(mapname);
if(!mappos)
{
G_THROW((ERR_MSG("XMLAnno.map_find") "\t")+mapname );
}else
{
map=Maps[mappos];
}
}
}
if(map)
{
ChangeAnno(width,height,dfile,*map);
}
}
#ifdef max
#undef max
#endif
template<class TYPE>
static inline TYPE max(TYPE a,TYPE b) { return (a>b)?a:b; }
#ifdef min
#undef min
#endif
template<class TYPE>
static inline TYPE min(TYPE a,TYPE b) { return (a<b)?a:b; }
// used to build the zone tree
// true is returned if the GRect is known for this object,
// and false, if the rectangle's size is just the parent size.
static bool
make_child_layer(
DjVuTXT::Zone &parent,
const lt_XMLTags &tag, ByteStream &bs,
const int height, const double ws, const double hs)
{
bool retval=true;
// the plugin thinks there are only Pages, Lines and Words
// so we don't make Paragraphs, Regions and Columns zones
// if we did the plugin is not able to search the text but
// DjVuToText writes out all the text anyway
DjVuTXT::Zone *self_ptr;
char sepchar;
const GUTF8String name(tag.get_name());
if(name == wordtag)
{
self_ptr=parent.append_child();
self_ptr->ztype = DjVuTXT::WORD;
sepchar=' ';
}else if(name == linetag)
{
self_ptr=parent.append_child();
self_ptr->ztype = DjVuTXT::LINE;
sepchar=DjVuTXT::end_of_line;
}else if(name == paragraphtag)
{
self_ptr=parent.append_child();
self_ptr->ztype = DjVuTXT::PARAGRAPH;
sepchar=DjVuTXT::end_of_paragraph;
}else if(name == regiontag)
{
self_ptr=parent.append_child();
self_ptr->ztype = DjVuTXT::REGION;
sepchar=DjVuTXT::end_of_region;
}else if(name == pagecolumntag)
{
self_ptr=parent.append_child();
self_ptr->ztype = DjVuTXT::COLUMN;
sepchar=DjVuTXT::end_of_column;
}else
{
self_ptr = &parent;
self_ptr->ztype = DjVuTXT::PAGE;
sepchar=0;
}
DjVuTXT::Zone &self = *self_ptr;
self.text_start = bs.tell();
int &xmin=self.rect.xmin, &ymin=self.rect.ymin,
&xmax=self.rect.xmax, &ymax=self.rect.ymax;
GRect default_rect;
default_rect.xmin=max(parent.rect.xmax,parent.rect.xmin);
default_rect.xmax=min(parent.rect.xmax,parent.rect.xmin);
default_rect.ymin=max(parent.rect.ymax,parent.rect.ymin);
default_rect.ymax=min(parent.rect.ymax,parent.rect.ymin);
// Now if there are coordinates, use those.
GPosition pos(tag.get_args().contains("coords"));
if(pos)
{
GList<int> rectArgs;
intList(tag.get_args()[pos], rectArgs);
if((pos=rectArgs))
{
xmin=(int)(ws*(double)rectArgs[pos]);
if(++pos)
{
ymin=(height-1)-(int)(hs*(double)rectArgs[pos]);
if(++pos)
{
xmax=(int)(ws*(double)rectArgs[pos]);
if(++pos)
{
ymax=(height-1)-(int)(hs*(double)rectArgs[pos]);
if(xmin>xmax) // Make sure xmin is really minimum
{
const int t=xmin;
xmin=xmax;
xmax=t;
}
if(ymin>ymax) // Make sure ymin is really minimum
{
const int t=ymin;
ymin=ymax;
ymax=t;
}
}
}
}
}
}
if(self.ztype == DjVuTXT::WORD)
{
if(! pos)
{
self.rect=default_rect;
retval=false;
}
const GUTF8String raw(tag.get_raw().fromEscaped());
const int i=raw.nextNonSpace(0);
bs.writestring(raw.substr(i,raw.firstEndSpace(i)-i));
if(sepchar)
bs.write8(sepchar);
self.text_length = bs.tell() - self.text_start;
}else if(pos)
{
pos=tag.get_content();
if(pos)
{
for(pos=tag.get_content(); pos; ++pos)
{
const GP<lt_XMLTags> t(tag.get_content()[pos].tag);
make_child_layer(self, *t, bs, height,ws,hs);
}
if(sepchar)
bs.write8(sepchar);
self.text_length = bs.tell() - self.text_start;
}else
{
const GUTF8String raw(tag.get_raw().fromEscaped());
const int i=raw.nextNonSpace(0);
bs.writestring(raw.substr(i,raw.firstEndSpace(i)-i));
if(sepchar)
bs.write8(sepchar);
self.text_length = bs.tell() - self.text_start;
}
}else
{
self.rect=default_rect;
if((pos=tag.get_content()))
{
do
{
const GP<lt_XMLTags> t(tag.get_content()[pos].tag);
const GRect save_rect(self.rect);
self.rect=default_rect;
if(retval=make_child_layer(self, *t, bs, height,ws,hs))
{
xmin=min(save_rect.xmin,xmin);
xmax=max(save_rect.xmax,xmax);
ymin=min(save_rect.ymin,ymin);
ymax=max(save_rect.ymax,ymax);
}else
{
// If the child doesn't have coordinates, we need to use a box
// at least as big as the parent's coordinates.
xmin=min(save_rect.xmin,default_rect.xmax);
xmax=max(save_rect.xmax,default_rect.xmin);
ymin=min(save_rect.ymin,default_rect.ymax);
ymax=max(save_rect.ymax,default_rect.ymin);
for(; pos; ++pos)
{
const GP<lt_XMLTags> t(tag.get_content()[pos].tag);
make_child_layer(self, *t, bs, height,ws,hs);
}
break;
}
} while(++pos);
if(sepchar)
bs.write8(sepchar);
self.text_length = bs.tell() - self.text_start;
}else
{
const GUTF8String raw(tag.get_raw().fromEscaped());
const int i=raw.nextNonSpace(0);
bs.writestring(raw.substr(i,raw.firstEndSpace(i)-i));
if(sepchar)
bs.write8(sepchar);
self.text_length = bs.tell() - self.text_start;
}
}
parent.rect.xmin=min(xmin,parent.rect.xmin);
parent.rect.ymin=min(ymin,parent.rect.ymin);
parent.rect.xmax=max(xmax,parent.rect.xmax);
parent.rect.ymax=max(ymax,parent.rect.ymax);
if(xmin>xmax)
{
const int t=xmin;
xmin=xmax;
xmax=t;
}
if(ymin>ymax)
{
const int t=ymin;
ymin=ymax;
ymax=t;
}
// DjVuPrintMessage("(%d,%d)(%d,%d)<<<\\%o>>>\n",
// xmin,ymin,xmax,ymax, sepchar);
return retval;
}
void
lt_XMLParser::Impl::ChangeTextOCR(
const GUTF8String &value,
const int width,
const int height,
const GP<DjVuFile> &dfile)
{
if(value.length() && value.downcase() != "false")
{
const GP<ByteStream> bs=OCRcallback(value,DjVuImage::create(dfile));
if( bs && bs->size() )
{
const GP<lt_XMLTags> tags(lt_XMLTags::create(bs));
ChangeText(width,height,*dfile,*tags);
}
}
}
void
lt_XMLParser::Impl::ChangeMeta(
DjVuFile &dfile, const lt_XMLTags &tags )
{
dfile.resume_decode(true);
GP<ByteStream> gbs(ByteStream::create());
tags.write(*gbs,false);
gbs->seek(0L);
GUTF8String raw(gbs->getAsUTF8());
if(raw.length())
{
//GUTF8String gs="<"+(metadatatag+(">"+raw))+"</"+metadatatag+">\n");
dfile.change_meta(raw+"\n");
}else
{
dfile.change_meta(GUTF8String());
}
}
void
lt_XMLParser::Impl::ChangeText(
const int width, const int height,
DjVuFile &dfile, const lt_XMLTags &tags )
{
dfile.resume_decode(true);
GP<DjVuText> text = DjVuText::create();
GP<DjVuTXT> txt = text->txt = DjVuTXT::create();
// to store the new text
GP<ByteStream> textbs = ByteStream::create();
GP<DjVuInfo> info=(dfile.info);
if(info)
{
const int h=info->height;
const int w=info->width;
txt->page_zone.text_start = 0;
DjVuTXT::Zone &parent=txt->page_zone;
parent.rect.xmin=0;
parent.rect.ymin=0;
parent.rect.ymax=h;
parent.rect.xmax=w;
double ws=1.0;
if(width && width != w)
{
ws=((double)w)/((double)width);
}
double hs=1.0;
if(height && height != h)
{
hs=((double)h)/((double)height);
}
make_child_layer(parent, tags, *textbs, h, ws,hs);
textbs->write8(0);
long len = textbs->tell();
txt->page_zone.text_length = len;
textbs->seek(0,SEEK_SET);
textbs->read(txt->textUTF8.getbuf(len), len);
dfile.change_text(txt,false);
}
}
void
lt_XMLParser::Impl::parse_text(
const int width,
const int height,
const lt_XMLTags &GObject,
DjVuFile &dfile )
{
GPosition textPos = GObject.contains(hiddentexttag);
if(textPos)
{
// loop through the hidden text - there should only be one
// if there are more ??only the last one will be saved??
GPList<lt_XMLTags> textTags = GObject[textPos];
GPosition pos = textTags;
ChangeText(width,height,dfile,*textTags[pos]);
}
}
void
lt_XMLParser::Impl::parse_meta(
const lt_XMLTags &GObject,
DjVuFile &dfile )
{
GPosition metaPos = GObject.contains(metadatatag);
if(metaPos)
{
// loop through the hidden text - there should only be one
// if there are more ??only the last one will be saved??
GPList<lt_XMLTags> metaTags = GObject[metaPos];
GPosition pos = metaTags;
ChangeMeta(dfile,*metaTags[pos]);
}
}
static GP<ByteStream>
OCRcallback(
void * const xarg,
lt_XMLParser::mapOCRcallback * const xcallback,
const GUTF8String &value,
const GP<DjVuImage> &image )
{
GP<ByteStream> retval;
static void *arg=0;
static lt_XMLParser::mapOCRcallback *callback=0;
if(image)
{
if(callback)
retval=callback(arg,value,image);
}else
{
arg=xarg;
callback=xcallback;
}
return retval;
}
void
lt_XMLParser::setOCRcallback(
void * const arg,
mapOCRcallback * const callback)
{
::OCRcallback(arg,callback);
}
#ifdef HAVE_NAMESPACES
}
# ifndef NOT_USING_DJVU_NAMESPACE
using namespace DJVU;
# endif
#endif
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