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tdegraphics/kviewshell/plugins/djvu/libdjvu/DjVuText.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: DjVuText.cpp,v 1.10 2004/07/07 19:23:36 leonb Exp $
// $Name: release_3_5_15 $
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma implementation
#endif
#include "DjVuText.h"
#include "IFFByteStream.h"
#include "BSByteStream.h"
#include "debug.h"
#include <ctype.h>
#ifdef HAVE_NAMESPACES
namespace DJVU {
# ifdef NOT_DEFINED // Just to fool emacs c++ mode
}
#endif
#endif
#ifdef min
#undef min
#endif
template<class TYPE>
static inline TYPE min(TYPE a,TYPE b) { return (a<b)?a:b; }
//***************************************************************************
//******************************** DjVuTXT **********************************
//***************************************************************************
const char DjVuTXT::end_of_column = 013; // VT:Qt::Vertical Tab
const char DjVuTXT::end_of_region = 035; // GS: Group Separator
const char DjVuTXT::end_of_paragraph = 037; // US: Unit Separator
const char DjVuTXT::end_of_line = 012; // LF: Line Feed
const int DjVuTXT::Zone::version = 1;
DjVuTXT::Zone::Zone()
: ztype(DjVuTXT::PAGE), text_start(0), text_length(0), zone_parent(0)
{
}
DjVuTXT::Zone *
DjVuTXT::Zone::append_child()
{
Zone empty;
empty.ztype = ztype;
empty.text_start = 0;
empty.text_length = 0;
empty.zone_parent=this;
tqchildren.append(empty);
return & tqchildren[tqchildren.lastpos()];
}
void
DjVuTXT::Zone::cleartext()
{
text_start = 0;
text_length = 0;
for (GPosition i=tqchildren; i; ++i)
tqchildren[i].cleartext();
}
void
DjVuTXT::Zone::normtext(const char *instr, GUTF8String &outstr)
{
if (text_length == 0)
{
// Descend collecting text below
text_start = outstr.length();
for (GPosition i=tqchildren; i; ++i)
tqchildren[i].normtext(instr, outstr);
text_length = outstr.length() - text_start;
// Ignore empty zones
if (text_length == 0)
return;
}
else
{
// Collect text at this level
int new_start = outstr.length();
outstr = outstr + GUTF8String(instr+text_start, text_length);
text_start = new_start;
// Clear textual information on lower level nodes
for (GPosition i=tqchildren; i; ++i)
tqchildren[i].cleartext();
}
// Determine standard separator
char sep;
switch (ztype)
{
case COLUMN:
sep = end_of_column; break;
case REGION:
sep = end_of_region; break;
case PARAGRAPH:
sep = end_of_paragraph; break;
case LINE:
sep = end_of_line; break;
case WORD:
sep = ' '; break;
default:
return;
}
// Add separator if not present yet.
if (outstr[text_start+text_length-1] != sep)
{
outstr = outstr + GUTF8String(&sep, 1);
text_length += 1;
}
}
unsigned int
DjVuTXT::Zone::memuse() const
{
int memuse = sizeof(*this);
for (GPosition i=tqchildren; i; ++i)
memuse += tqchildren[i].memuse();
return memuse;
}
#ifndef NEED_DECODER_ONLY
void
DjVuTXT::Zone::encode(
const GP<ByteStream> &gbs, const Zone * parent, const Zone * prev) const
{
ByteStream &bs=*gbs;
// Encode type
bs.write8(ztype);
// Modify text_start and bounding rectangle based on the context
// (whether there is a previous non-zero same-level-child or parent)
int start=text_start;
int x=rect.xmin, y=rect.ymin;
int width=rect.width(), height=rect.height();
if (prev)
{
if (ztype==PAGE || ztype==PARAGRAPH || ztype==LINE)
{
// Encode offset from the lower left corner of the previous
// child in the coord system in that corner with x to the
// right and y down
x=x-prev->rect.xmin;
y=prev->rect.ymin-(y+height);
} else // Either COLUMN or WORD or CHARACTER
{
// Encode offset from the lower right corner of the previous
// child in the coord system in that corner with x to the
// right and y up
x=x-prev->rect.xmax;
y=y-prev->rect.ymin;
}
start-=prev->text_start+prev->text_length;
} else if (parent)
{
// Encode offset from the upper left corner of the parent
// in the coord system in that corner with x to the right and y down
x=x-parent->rect.xmin;
y=parent->rect.ymax-(y+height);
start-=parent->text_start;
}
// Encode rectangle
bs.write16(0x8000+x);
bs.write16(0x8000+y);
bs.write16(0x8000+width);
bs.write16(0x8000+height);
// Encode text info
bs.write16(0x8000+start);
bs.write24(text_length);
// Encode number of tqchildren
bs.write24(tqchildren.size());
const Zone * prev_child=0;
// Encode all tqchildren
for (GPosition i=tqchildren; i; ++i)
{
tqchildren[i].encode(gbs, this, prev_child);
prev_child=&tqchildren[i];
}
}
#endif
void
DjVuTXT::Zone::decode(const GP<ByteStream> &gbs, int maxtext,
const Zone * parent, const Zone * prev)
{
ByteStream &bs=*gbs;
// Decode type
ztype = (ZoneType) bs.read8();
if ( ztype<PAGE || ztype>CHARACTER )
G_THROW( ERR_MSG("DjVuText.corrupt_text") );
// Decode coordinates
int x=(int) bs.read16()-0x8000;
int y=(int) bs.read16()-0x8000;
int width=(int) bs.read16()-0x8000;
int height=(int) bs.read16()-0x8000;
// Decode text info
text_start = (int) bs.read16()-0x8000;
// int start=text_start;
text_length = bs.read24();
if (prev)
{
if (ztype==PAGE || ztype==PARAGRAPH || ztype==LINE)
{
x=x+prev->rect.xmin;
y=prev->rect.ymin-(y+height);
} else // Either COLUMN or WORD or CHARACTER
{
x=x+prev->rect.xmax;
y=y+prev->rect.ymin;
}
text_start+=prev->text_start+prev->text_length;
} else if (parent)
{
x=x+parent->rect.xmin;
y=parent->rect.ymax-(y+height);
text_start+=parent->text_start;
}
rect=GRect(x, y, width, height);
// Get tqchildren size
int size = bs.read24();
// Checks
if (rect.isempty() || text_start<0 || text_start+text_length>maxtext )
G_THROW( ERR_MSG("DjVuText.corrupt_text") );
// Process tqchildren
const Zone * prev_child=0;
tqchildren.empty();
while (size-- > 0)
{
Zone *z = append_child();
z->decode(gbs, maxtext, this, prev_child);
prev_child=z;
}
}
void
DjVuTXT::normalize_text()
{
GUTF8String newtextUTF8;
page_zone.normtext( (const char*)textUTF8, newtextUTF8 );
textUTF8 = newtextUTF8;
}
int
DjVuTXT::has_valid_zones() const
{
if (!textUTF8)
return false;
if (page_zone.tqchildren.isempty() || page_zone.rect.isempty())
return false;
return true;
}
#ifndef NEED_DECODER_ONLY
void
DjVuTXT::encode(const GP<ByteStream> &gbs) const
{
ByteStream &bs=*gbs;
if (! textUTF8 )
G_THROW( ERR_MSG("DjVuText.no_text") );
// Encode text
int textsize = textUTF8.length();
bs.write24( textsize );
bs.writall( (void*)(const char*)textUTF8, textsize );
// Encode zones
if (has_valid_zones())
{
bs.write8(Zone::version);
page_zone.encode(gbs);
}
}
#endif
void
DjVuTXT::decode(const GP<ByteStream> &gbs)
{
ByteStream &bs=*gbs;
// Read text
textUTF8.empty();
int textsize = bs.read24();
char *buffer = textUTF8.getbuf(textsize);
int readsize = bs.read(buffer,textsize);
buffer[readsize] = 0;
if (readsize < textsize)
G_THROW( ERR_MSG("DjVuText.corrupt_chunk") );
// Try reading zones
unsigned char version;
if ( bs.read( (void*) &version, 1 ) == 1)
{
if (version != Zone::version)
G_THROW( ERR_MSG("DjVuText.bad_version") "\t" + GUTF8String(version) );
page_zone.decode(gbs, textsize);
}
}
GP<DjVuTXT>
DjVuTXT::copy(void) const
{
return new DjVuTXT(*this);
}
static inline bool
intersects_zone(GRect box, const GRect &zone)
{
return
((box.xmin < zone.xmin)
?(box.xmax >= zone.xmin)
:(box.xmin <= zone.xmax))
&&((box.ymin < zone.ymin)
?(box.ymax >= zone.ymin)
:(box.ymin <= zone.ymax));
}
void
DjVuTXT::Zone::get_text_with_rect(const GRect &box,
int &string_start, int &string_end) const
{
GPosition pos=tqchildren;
if(pos?box.contains(rect):intersects_zone(box,rect))
{
const int text_end=text_start+text_length;
if(string_start == string_end)
{
string_start=text_start;
string_end=text_end;
}else
{
if (string_end < text_end)
string_end=text_end;
if(text_start < string_start)
string_start=text_start;
}
}else if(pos&&intersects_zone(box,rect))
{
do
{
tqchildren[pos].get_text_with_rect(box,string_start,string_end);
} while(++pos);
}
}
void
DjVuTXT::Zone::find_zones(GList<Zone *> &list,
const int string_start, const int string_end) const
{
const int text_end=text_start+text_length;
if(text_start >= string_start)
{
if(text_end <= string_end)
{
list.append(const_cast<Zone *>(this));
}
else if(text_start < string_end)
{
if (tqchildren.size())
for (GPosition pos=tqchildren; pos; ++pos)
tqchildren[pos].find_zones(list,string_start,string_end);
else
list.append(const_cast<Zone *>(this));
}
}
else if( text_end > string_start)
{
if (tqchildren.size())
for (GPosition pos=tqchildren; pos; ++pos)
tqchildren[pos].find_zones(list,string_start,string_end);
else
list.append(const_cast<Zone *>(this));
}
}
void
DjVuTXT::Zone::get_smallest(GList<GRect> &list) const
{
GPosition pos=tqchildren;
if(pos)
{
do {
tqchildren[pos].get_smallest(list);
} while (++pos);
}
else
{
list.append(rect);
}
}
void
DjVuTXT::Zone::get_smallest(GList<GRect> &list, const int padding) const
{
GPosition pos=tqchildren;
if(pos)
{
do {
tqchildren[pos].get_smallest(list,padding);
} while (++pos);
}
else if(zone_parent && zone_parent->ztype >= PARAGRAPH)
{
const GRect &xrect=zone_parent->rect;
if(xrect.height() < xrect.width())
{
list.append(GRect(rect.xmin-padding,xrect.ymin-padding,rect.width()
+2*padding,xrect.height()+2*padding));
}
else
{
list.append(GRect(xrect.xmin-padding,rect.ymin-padding,xrect.width()
+2*padding,rect.height()+2*padding));
}
}
else
{
list.append(GRect(rect.xmin-padding,rect.ymin-padding,rect.width()
+2*padding,rect.height()+2*padding));
}
}
void
DjVuTXT::get_zones(int zone_type, const Zone *parent,
GList<Zone *> & zone_list) const
// get all the zones of type zone_type under zone node parent
{
// search all branches under parent
const Zone *zone=parent;
for( int cur_ztype=zone->ztype; cur_ztype<zone_type; ++cur_ztype )
{
GPosition pos;
for(pos=zone->tqchildren; pos; ++pos)
{
Zone *zcur=(Zone *)&zone->tqchildren[pos];
if ( zcur->ztype == zone_type )
{
GPosition zpos=zone_list;
if ( !zone_list.search(zcur,zpos) )
zone_list.append(zcur);
}
else if ( zone->tqchildren[pos].ztype < zone_type )
get_zones(zone_type, &zone->tqchildren[pos], zone_list);
}
}
}
GList<GRect>
DjVuTXT::find_text_with_rect(const GRect &box, GUTF8String &text,
const int padding) const
{
GList<GRect> retval;
int text_start=0;
int text_end=0;
page_zone.get_text_with_rect(box,text_start,text_end);
if(text_start != text_end)
{
GList<Zone *> zones;
page_zone.find_zones(zones,text_start,text_end);
GPosition pos=zones;
if(pos)
{
do
{
if(padding >= 0)
{
zones[pos]->get_smallest(retval,padding);
}else
{
zones[pos]->get_smallest(retval);
}
} while(++pos);
}
}
text=textUTF8.substr(text_start,text_end-text_start);
return retval;
}
GList<DjVuTXT::Zone *>
DjVuTXT::find_text_in_rect(GRect target_rect, GUTF8String &text) const
// returns a list of zones of type WORD in the nearest/selected paragraph
{
GList<Zone *> zone_list;
GList<Zone *> lines;
get_zones((int)PARAGRAPH, &page_zone, zone_list);
// it's possible that no paragraph structure exists for reasons that
// 1) ocr engine is not capable 2) file was modified by user. In such case,
// we can only make a rough guess, i.e., select all the lines intersected with
// target_rect
if (zone_list.isempty())
{
get_zones((int)LINE, &page_zone, zone_list);
GPosition pos;
for(pos=zone_list; pos; ++pos)
{
GRect rect=zone_list[pos]->rect;
int h0=rect.height()/2;
if(rect.intersect(rect,target_rect) && rect.height()>h0)
lines.append(zone_list[pos]);
}
} else
{
GPosition pos, pos_sel=zone_list;
float ar=0;
for(pos=zone_list; pos; ++pos)
{
GRect rect=zone_list[pos]->rect;
int area=rect.area();
if (rect.intersect(rect, target_rect))
{
float ftmp=rect.area()/(float)area;
if ( !ar || ar<ftmp )
{
ar=ftmp;
pos_sel=pos;
}
}
}
Zone *parag = 0;
if ( ar>0 ) parag=zone_list[pos_sel];
zone_list.empty();
if ( ar>0 )
{
get_zones((int)LINE, parag, zone_list);
if ( !zone_list.isempty() )
{
for(GPosition pos=zone_list; pos; ++pos)
{
GRect rect=zone_list[pos]->rect;
int h0=rect.height()/2;
if(rect.intersect(rect,target_rect) && rect.height()>h0)
lines.append(zone_list[pos]);
}
}
}
}
zone_list.empty();
if (!lines.isempty())
{
int i=1, lsize=lines.size();
GList<Zone *> words;
for (GPosition pos=lines; pos; ++pos, ++i)
{
words.empty();
get_zones((int)WORD, lines[pos], words);
if ( lsize==1 )
{
for(GPosition p=words;p;++p)
{
GRect rect=words[p]->rect;
if(rect.intersect(rect,target_rect))
//if (target_rect.contains(words[p]->rect))
zone_list.append(words[p]);
}
} else
{
if (i==1)
{
bool start=true;
for(GPosition p=words; p; ++p)
{
if ( start )
{
GRect rect=words[p]->rect;
if(rect.intersect(rect,target_rect))
//if (target_rect.contains(words[p]->rect))
{
start=false;
zone_list.append(words[p]);
}
} else
zone_list.append(words[p]);
}
} else if (i==lsize)
{
bool end=true;
for(GPosition p=words.lastpos();p;--p)
{
if ( end )
{
GRect rect=words[p]->rect;
if(rect.intersect(rect,target_rect))
//if(target_rect.contains(words[p]->rect) )
{
end=false;
zone_list.append(words[p]);
}
} else
zone_list.append(words[p]);
}
}
if (i!=1 && i!=lsize )
{
for(GPosition p=words;p;++p)
zone_list.append(words[p]);
}
}
}
}
return zone_list;
}
unsigned int
DjVuTXT::get_memory_usage() const
{
return sizeof(*this) + textUTF8.length() + page_zone.memuse() - sizeof(page_zone);
}
//***************************************************************************
//******************************** DjVuText *********************************
//***************************************************************************
void
DjVuText::decode(const GP<ByteStream> &gbs)
{
GUTF8String chkid;
GP<IFFByteStream> giff=IFFByteStream::create(gbs);
IFFByteStream &iff=*giff;
while( iff.get_chunk(chkid) )
{
if (chkid == "TXTa")
{
if (txt)
G_THROW( ERR_MSG("DjVuText.dupl_text") );
txt = DjVuTXT::create();
txt->decode(iff.get_bytestream());
}
else if (chkid == "TXTz")
{
if (txt)
G_THROW( ERR_MSG("DjVuText.dupl_text") );
txt = DjVuTXT::create();
const GP<ByteStream> gbsiff=BSByteStream::create(iff.get_bytestream());
txt->decode(gbsiff);
}
// Add decoding of other chunks here
iff.close_chunk();
}
}
void
DjVuText::encode(const GP<ByteStream> &gbs)
{
if (txt)
{
const GP<IFFByteStream> giff=IFFByteStream::create(gbs);
IFFByteStream &iff=*giff;
iff.put_chunk("TXTz");
{
GP<ByteStream> gbsiff=BSByteStream::create(iff.get_bytestream(),50);
txt->encode(gbsiff);
}
iff.close_chunk();
}
// Add encoding of other chunks here
}
GP<DjVuText>
DjVuText::copy(void) const
{
GP<DjVuText> text= new DjVuText;
// Copy any primitives (if any)
*text=*this;
// Copy each substructure
if (txt)
text->txt = txt->copy();
return text;
}
static GUTF8String
indent ( int spaces)
{
GUTF8String ret;
for( int i = 0 ; i < spaces ; i++ )
ret += ' ';
return ret;
}
static const char *tags[8]=
{ 0,
"HIDDENTEXT",
"PAGECOLUMN",
"REGION",
"PARAGRAPH",
"LINE",
"WORD",
"CHARACTER" };
static const int tags_size=sizeof(tags)/sizeof(const char *);
static GUTF8String
start_tag(const DjVuTXT::ZoneType zone)
{
GUTF8String retval;
if((tags_size > (int)zone)&&((int)zone > 0))
{
switch (zone)
{
case DjVuTXT::CHARACTER:
retval="<"+GUTF8String(tags[zone])+">";
break;
case DjVuTXT::WORD:
retval=indent(2*(int)zone+2)+"<"+tags[zone]+">";
break;
default:
retval=indent(2*(int)zone+2)+"<"+tags[zone]+">\n";
break;
}
}
return retval;
}
static GUTF8String
start_tag(const DjVuTXT::ZoneType zone, const GUTF8String &attributes)
{
GUTF8String retval;
if((tags_size > (int)zone)&&((int)zone > 0))
{
switch (zone)
{
case DjVuTXT::CHARACTER:
retval="<"+GUTF8String(tags[zone])+" "+attributes+">";
break;
case DjVuTXT::WORD:
retval=indent(2*(int)zone+2)+"<"+tags[zone]+" "+attributes+">";
break;
default:
retval=indent(2*(int)zone+2)+"<"+tags[zone]+" "+attributes+">\n";
break;
}
}
return retval;
}
static inline GUTF8String
start_tag(const int layer)
{
return start_tag((const DjVuTXT::ZoneType)layer);
}
static GUTF8String
end_tag(const DjVuTXT::ZoneType zone)
{
GUTF8String retval;
if((tags_size > (int)zone)&&((int)zone >= 0))
{
switch (zone)
{
case DjVuTXT::CHARACTER:
retval="</"+GUTF8String(tags[zone])+">";
break;
case DjVuTXT::WORD:
retval="</"+GUTF8String(tags[zone])+">\n";
break;
default:
retval=indent(2*(int)zone+2)+"</"+tags[zone]+">\n";
break;
}
}
return retval;
}
static inline GUTF8String
end_tag(const int layer)
{
return end_tag((const DjVuTXT::ZoneType)layer);
}
static GUTF8String
tolayer(int &layer, const DjVuTXT::ZoneType next_layer)
{
GUTF8String retval;
for( ;layer < (int)next_layer;layer++ )
{
retval+=start_tag(layer);
}
while (layer > (int)next_layer )
{
retval+=end_tag(--layer);
}
return retval;
}
static void
writeText( ByteStream & str_out,
const GUTF8String &textUTF8,
const DjVuTXT::Zone &zone,
const int WindowHeight );
static void
writeText( ByteStream & str_out,
const GUTF8String &textUTF8,
const DjVuTXT::ZoneType zlayer,
const GList<DjVuTXT::Zone> &tqchildren,
const int WindowHeight )
{
// assert( txt->has_valid_zones() );
// DEBUG_MSG( "--zonetype=" << txt->page_zone.ztype << "\n" );
// Beginning tags for missing layers
int layer=(int)zlayer;
// Output the next layer
for(GPosition pos=tqchildren ; pos ; ++pos )
{
str_out.writestring(tolayer(layer,tqchildren[pos].ztype));
writeText( str_out,
textUTF8,
tqchildren[pos],
WindowHeight );
}
str_out.writestring(tolayer(layer,zlayer));
}
static void
writeText( ByteStream & str_out,
const GUTF8String &textUTF8,
const DjVuTXT::Zone &zone,
const int WindowHeight )
{
// DEBUG_MSG( "--zonetype=" << zone.ztype << "\n" );
const GUTF8String xindent(indent( 2 * zone.ztype + 2 ));
GPosition pos=zone.tqchildren;
// Build attribute string
if( ! pos )
{
GUTF8String coords;
coords.format("coords=\"%d,%d,%d,%d\"",
zone.rect.xmin, WindowHeight - 1 - zone.rect.ymin,
zone.rect.xmax, WindowHeight - 1 - zone.rect.ymax);
const int start=zone.text_start;
const int end=textUTF8.firstEndSpace(start,zone.text_length);
str_out.writestring(start_tag(zone.ztype,coords));
str_out.writestring(textUTF8.substr(start,end-start).toEscaped());
str_out.writestring(end_tag(zone.ztype));
} else
{
writeText(str_out,textUTF8,zone.ztype,zone.tqchildren,WindowHeight);
}
}
void
DjVuTXT::writeText(ByteStream &str_out,const int height) const
{
if(has_valid_zones())
{
::writeText(str_out,textUTF8,DjVuTXT::PAGE,page_zone.tqchildren,height);
}else
{
str_out.writestring(start_tag(DjVuTXT::PAGE));
str_out.writestring(end_tag(DjVuTXT::PAGE));
}
}
void
DjVuText::writeText(ByteStream &str_out,const int height) const
{
if(txt)
{
txt->writeText(str_out,height);
}else
{
str_out.writestring("<"+GUTF8String(tags[DjVuTXT::PAGE])+"/>\n");
}
}
GUTF8String
DjVuTXT::get_xmlText(const int height) const
{
GP<ByteStream> gbs(ByteStream::create());
ByteStream &bs=*gbs;
writeText(bs,height);
bs.seek(0L);
return bs.getAsUTF8();
}
GUTF8String
DjVuText::get_xmlText(const int height) const
{
GUTF8String retval;
if(txt)
{
retval=txt->get_xmlText(height);
}else
{
retval="<"+GUTF8String(tags[DjVuTXT::PAGE])+"/>\n";
}
return retval;
}
#ifdef HAVE_NAMESPACES
}
# ifndef NOT_USING_DJVU_NAMESPACE
using namespace DJVU;
# endif
#endif
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