diff options
Diffstat (limited to 'kviewshell/plugins/djvu/libdjvu/DjVuText.cpp')
| -rw-r--r-- | kviewshell/plugins/djvu/libdjvu/DjVuText.cpp | 971 |
1 files changed, 971 insertions, 0 deletions
diff --git a/kviewshell/plugins/djvu/libdjvu/DjVuText.cpp b/kviewshell/plugins/djvu/libdjvu/DjVuText.cpp new file mode 100644 index 00000000..b359df41 --- /dev/null +++ b/kviewshell/plugins/djvu/libdjvu/DjVuText.cpp @@ -0,0 +1,971 @@ +//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: 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; + children.append(empty); + return & children[children.lastpos()]; +} + +void +DjVuTXT::Zone::cleartext() +{ + text_start = 0; + text_length = 0; + for (GPosition i=children; i; ++i) + children[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=children; i; ++i) + children[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=children; i; ++i) + children[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=children; i; ++i) + memuse += children[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 children + bs.write24(children.size()); + + const Zone * prev_child=0; + // Encode all children + for (GPosition i=children; i; ++i) + { + children[i].encode(gbs, this, prev_child); + prev_child=&children[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 children 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 children + const Zone * prev_child=0; + children.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.children.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=children; + 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 + { + children[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 (children.size()) + for (GPosition pos=children; pos; ++pos) + children[pos].find_zones(list,string_start,string_end); + else + list.append(const_cast<Zone *>(this)); + } + } + else if( text_end > string_start) + { + if (children.size()) + for (GPosition pos=children; pos; ++pos) + children[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=children; + if(pos) + { + do { + children[pos].get_smallest(list); + } while (++pos); + } + else + { + list.append(rect); + } +} + +void +DjVuTXT::Zone::get_smallest(GList<GRect> &list, const int padding) const +{ + GPosition pos=children; + if(pos) + { + do { + children[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->children; pos; ++pos) + { + Zone *zcur=(Zone *)&zone->children[pos]; + if ( zcur->ztype == zone_type ) + { + GPosition zpos=zone_list; + if ( !zone_list.search(zcur,zpos) ) + zone_list.append(zcur); + } + else if ( zone->children[pos].ztype < zone_type ) + get_zones(zone_type, &zone->children[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> &children, + 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=children ; pos ; ++pos ) + { + str_out.writestring(tolayer(layer,children[pos].ztype)); + writeText( str_out, + textUTF8, + children[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.children; + // 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.children,WindowHeight); + } +} + +void +DjVuTXT::writeText(ByteStream &str_out,const int height) const +{ + if(has_valid_zones()) + { + ::writeText(str_out,textUTF8,DjVuTXT::PAGE,page_zone.children,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 + |