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tdegraphics/kviewshell/plugins/djvu/libdjvu/DjVmDoc.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: DjVmDoc.cpp,v 1.10 2005/05/25 20:24:52 leonb Exp $
// $Name: release_3_5_15 $
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma implementation
#endif
#include "DjVmDoc.h"
#include "DjVmNav.h"
#include "DataPool.h"
#include "IFFByteStream.h"
#include "GOS.h"
#include "debug.h"
#ifdef HAVE_NAMESPACES
namespace DJVU {
# ifdef NOT_DEFINED // Just to fool emacs c++ mode
}
#endif
#endif
static const char octets[4]={0x41,0x54,0x26,0x54};
// Save the file to disk, remapping INCL chunks while saving.
static void
save_file(
IFFByteStream &iff_in, IFFByteStream &iff_out, const DjVmDir &dir,
GMap<GUTF8String,GUTF8String> &incl)
{
GUTF8String chkid;
if (iff_in.get_chunk(chkid))
{
iff_out.put_chunk(chkid,true);
if(!chkid.cmp("FORM:",5))
{
for(;iff_in.get_chunk(chkid);iff_in.close_chunk())
{
iff_out.put_chunk(chkid);
if(chkid == "INCL")
{
GUTF8String incl_str;
char buffer[1024];
int length;
while((length=iff_in.read(buffer, 1024)))
incl_str+=GUTF8String(buffer, length);
// Eat '\n' in the beginning and at the end
while(incl_str.length() && incl_str[0]=='\n')
{
incl_str=incl_str.substr(1,(unsigned int)(-1));
}
while(incl_str.length()>0 && incl_str[(int)incl_str.length()-1]=='\n')
{
incl_str.setat(incl_str.length()-1, 0);
}
GPosition pos=incl.contains(incl_str);
if(pos)
{
iff_out.get_bytestream()->writestring(incl[pos]);
}else
{
GP<DjVmDir::File> incl_file=dir.id_to_file(incl_str);
if(incl_file)
{
DEBUG_MSG("INCL '"<<(const char *)incl_file->get_save_name()<<"'\n");
const GUTF8String incl_name=incl_file->get_save_name();
incl[incl_str]=incl_name;
iff_out.get_bytestream()->writestring(incl_name);
}else
{
DEBUG_MSG("BOGUS INCL '"<<(const char *)incl_str<<"'\n");
iff_out.copy(*iff_in.get_bytestream());
}
}
}else
{
iff_out.copy(*iff_in.get_bytestream());
}
iff_out.close_chunk();
}
}else
{
iff_out.copy(*iff_in.get_bytestream());
}
iff_out.close_chunk();
iff_in.close_chunk();
}
}
DjVmDoc::DjVmDoc(void)
{
DEBUG_MSG("DjVmDoc::DjVmDoc(): Constructing empty DjVm document.\n");
DEBUG_MAKE_INDENT(3);
}
void
DjVmDoc::init(void)
{
dir=DjVmDir::create();
}
GP<DjVmDoc>
DjVmDoc::create(void)
{
DjVmDoc *doc=new DjVmDoc();
GP<DjVmDoc> retval=doc;
doc->init();
return retval;
}
void
DjVmDoc::insert_file(const GP<DjVmDir::File> & f,
GP<DataPool> data_pool, int pos)
{
DEBUG_MSG("DjVmDoc::insert_file(): inserting file '" << f->get_load_name() <<
"' at pos " << pos << "\n");
DEBUG_MAKE_INDENT(3);
if (!f)
G_THROW( ERR_MSG("DjVmDoc.no_zero_file") );
if (data.contains(f->get_load_name()))
G_THROW( ERR_MSG("DjVmDoc.no_duplicate") );
char buffer[4];
if (data_pool->get_data(buffer, 0, 4)==4 && !memcmp(buffer, octets, 4))
{
data_pool=DataPool::create(data_pool, 4, -1);
}
data[f->get_load_name()]=data_pool;
dir->insert_file(f, pos);
}
void
DjVmDoc::insert_file(
ByteStream &data, DjVmDir::File::FILE_TYPE file_type,
const GUTF8String &name, const GUTF8String &id, const GUTF8String &title,
int pos)
{
const GP<DjVmDir::File> file(
DjVmDir::File::create(name, id, title, file_type));
const GP<DataPool> pool(DataPool::create());
// Cannot connect to a bytestream.
// Must copy data into the datapool.
int nbytes;
char buffer[1024];
while ((nbytes = data.read(buffer, sizeof(buffer))))
pool->add_data(buffer, nbytes);
pool->set_eof();
// Call low level insert
insert_file(file, pool, pos);
}
void
DjVmDoc::insert_file(
const GP<DataPool> &pool, DjVmDir::File::FILE_TYPE file_type,
const GUTF8String &name, const GUTF8String &id, const GUTF8String &title,
int pos)
{
const GP<DjVmDir::File> file(
DjVmDir::File::create(name, id, title, file_type));
// Call low level insert
insert_file(file, pool, pos);
}
void
DjVmDoc::delete_file(const GUTF8String &id)
{
DEBUG_MSG("DjVmDoc::delete_file(): deleting file '" << id << "'\n");
DEBUG_MAKE_INDENT(3);
if (!data.contains(id))
G_THROW(GUTF8String( ERR_MSG("DjVmDoc.cant_delete") "\t") + id);
data.del(id);
dir->delete_file(id);
}
void
DjVmDoc::set_djvm_nav(GP<DjVmNav> n)
{
if (n && ! n->isValidBookmark())
G_THROW("Invalid bookmark data");
nav = n;
}
GP<DataPool>
DjVmDoc::get_data(const GUTF8String &id) const
{
GPosition pos;
if (!data.contains(id, pos))
G_THROW(GUTF8String( ERR_MSG("DjVmDoc.cant_find") "\t") + id);
const GP<DataPool> pool(data[pos]);
// First check that the file is in IFF format
G_TRY
{
const GP<ByteStream> str_in(pool->get_stream());
const GP<IFFByteStream> giff_in=IFFByteStream::create(str_in);
IFFByteStream &iff_in=*giff_in;
GUTF8String chkid;
int size=iff_in.get_chunk(chkid);
if (size<0 || size>0x7fffffff)
G_THROW( ERR_MSG("DjVmDoc.not_IFF") "\t" + id);
}
G_CATCH_ALL
{
G_THROW( ERR_MSG("DjVmDoc.not_IFF") "\t" + id);
}
G_ENDCATCH;
return pool;
}
void
DjVmDoc::write(const GP<ByteStream> &gstr)
{
const GMap<GUTF8String,void *> reserved;
write(gstr,reserved);
}
static inline GUTF8String
get_name(const DjVmDir::File &file)
{
const GUTF8String save_name(file.get_save_name());
return save_name.length()?save_name:(file.get_load_name());
}
void
DjVmDoc::write(const GP<ByteStream> &gstr,
const GMap<GUTF8String,void *> &reserved)
{
DEBUG_MSG("DjVmDoc::write(): Storing document into the byte stream.\n");
DEBUG_MAKE_INDENT(3);
GPList<DjVmDir::File> files_list=dir->resolve_duplicates(true);
bool do_rename=false;
GPosition pos(reserved);
GMap<GUTF8String,GUTF8String> incl;
DEBUG_MSG("pass 1: looking for reserved names.");
if(pos)
{
// Check if there are any conflicting file names.
for(pos=files_list;pos;++pos)
{
GP<DjVmDir::File> file=files_list[pos];
if((do_rename=(reserved.contains(file->get_load_name())?true:false))
||(do_rename=(reserved.contains(file->get_save_name())?true:false)))
{
break;
}
}
// If there are conflicting file names, check if the save names
// are OK. If not, generate new save names.
if(do_rename)
{
DEBUG_MSG("pass 1: renaming reserved names.");
for(;;files_list=dir->resolve_duplicates(true))
{
GMap<GUTF8String,void *> this_doc;
for(pos=files_list;pos;++pos)
{
GP<DjVmDir::File> file=files_list[pos];
this_doc[::get_name(*file)]=0;
}
bool need_new_list=false;
for(pos=files_list;pos;++pos)
{
GP<DjVmDir::File> file=files_list[pos];
const GUTF8String name(::get_name(*file));
if(reserved.contains(name))
{
GUTF8String new_name;
int series=0;
do
{
int dot=name.rsearch('.');
if(dot>0)
{
new_name=name.substr(0,dot)+
"_"+GUTF8String(++series)+name.substr(dot,-1);
}else
{
new_name=name+"_"+GUTF8String(++series);
}
} while(reserved.contains(new_name)||this_doc.contains(new_name));
dir->set_file_name(file->get_load_name(),new_name);
need_new_list=true;
}
}
if(!need_new_list)
break;
}
}
}
DEBUG_MSG("pass 2: create dummy DIRM chunk and calculate offsets...\n");
for(pos=files_list;pos;++pos)
{
GP<DjVmDir::File> file=files_list[pos];
file->offset=0xffffffff;
GPosition data_pos=data.contains(file->get_load_name());
if (!data_pos)
G_THROW( ERR_MSG("DjVmDoc.no_data") "\t" + file->get_load_name());
if(do_rename)
{
GP<ByteStream> gout(ByteStream::create());
{
const GP<IFFByteStream> giff_in(
IFFByteStream::create(data[data_pos]->get_stream()));
const GP<IFFByteStream> giff_out(IFFByteStream::create(gout));
::save_file(*giff_in,*giff_out,*dir,incl);
}
gout->seek(0L);
data[data_pos]=DataPool::create(gout);
}
file->size=data[data_pos]->get_length();
if (!file->size)
G_THROW( ERR_MSG("DjVmDoc.zero_file") );
}
const GP<ByteStream> tmp_str(ByteStream::create());
const GP<IFFByteStream> gtmp_iff(IFFByteStream::create(tmp_str));
IFFByteStream &tmp_iff=*gtmp_iff;
tmp_iff.put_chunk("FORM:DJVM", 1);
tmp_iff.put_chunk("DIRM");
dir->encode(tmp_iff.get_bytestream(),do_rename);
tmp_iff.close_chunk();
if (nav)
{
tmp_iff.put_chunk("NAVM");
nav->encode(tmp_iff.get_bytestream());
tmp_iff.close_chunk();
}
tmp_iff.close_chunk();
int offset=tmp_iff.tell();
for(pos=files_list;pos;++pos)
{
if ((offset & 1)!=0)
offset++;
GP<DjVmDir::File> & file=files_list[pos];
file->offset=offset;
offset+=file->size; // file->size has been set in the first pass
}
DEBUG_MSG("pass 3: store the file contents.\n");
GP<IFFByteStream> giff=IFFByteStream::create(gstr);
IFFByteStream &iff=*giff;
iff.put_chunk("FORM:DJVM", 1);
iff.put_chunk("DIRM");
dir->encode(iff.get_bytestream(),do_rename);
iff.close_chunk();
if (nav)
{
iff.put_chunk("NAVM");
nav->encode(iff.get_bytestream());
iff.close_chunk();
}
for(pos=files_list;pos;++pos)
{
GP<DjVmDir::File> & file=files_list[pos];
const GP<DataPool> pool=get_data(file->get_load_name());
const GP<ByteStream> str_in(pool->get_stream());
if ((iff.tell() & 1)!=0)
{
iff.get_bytestream()->write8(0);
}
iff.copy(*str_in);
}
iff.close_chunk();
iff.flush();
DEBUG_MSG("done storing DjVm file.\n");
}
void
DjVmDoc::read(const GP<DataPool> & pool)
{
DEBUG_MSG("DjVmDoc::read(): reading the BUNDLED doc contents from the pool\n");
DEBUG_MAKE_INDENT(3);
const GP<ByteStream> str(pool->get_stream());
GP<IFFByteStream> giff=IFFByteStream::create(str);
IFFByteStream &iff=*giff;
GUTF8String chkid;
iff.get_chunk(chkid);
if (chkid!="FORM:DJVM")
G_THROW( ERR_MSG("DjVmDoc.no_form_djvm") );
iff.get_chunk(chkid);
if (chkid!="DIRM")
G_THROW( ERR_MSG("DjVmDoc.no_dirm_chunk") );
dir->decode(iff.get_bytestream());
iff.close_chunk();
data.empty();
if (dir->is_indirect())
G_THROW( ERR_MSG("DjVmDoc.cant_read_indr") );
GPList<DjVmDir::File> files_list=dir->get_files_list();
for(GPosition pos=files_list;pos;++pos)
{
DjVmDir::File * f=files_list[pos];
DEBUG_MSG("reading contents of file '" << f->get_load_name() << "'\n");
data[f->get_load_name()]=DataPool::create(pool, f->offset, f->size);
}
}
void
DjVmDoc::read(ByteStream & str_in)
{
DEBUG_MSG("DjVmDoc::read(): reading the BUNDLED doc contents from the stream\n");
DEBUG_MAKE_INDENT(3);
GP<DataPool> pool=DataPool::create();
char buffer[1024];
int length;
while((length=str_in.read(buffer, 1024)))
pool->add_data(buffer, length);
pool->set_eof();
read(pool);
}
void
DjVmDoc::read(const GURL &url)
{
DEBUG_MSG("DjVmDoc::read(): reading the doc contents from the HDD\n");
DEBUG_MAKE_INDENT(3);
GP<DataPool> pool=DataPool::create(url);
const GP<ByteStream> str(pool->get_stream());
GP<IFFByteStream> giff=IFFByteStream::create(str);
IFFByteStream &iff=*giff;
GUTF8String chkid;
iff.get_chunk(chkid);
if (chkid!="FORM:DJVM")
G_THROW( ERR_MSG("DjVmDoc.no_form_djvm2") );
iff.get_chunk(chkid);
if (chkid!="DIRM")
G_THROW( ERR_MSG("DjVmDoc.no_dirm_chunk") );
dir->decode(iff.get_bytestream());
iff.close_chunk();
if (dir->is_bundled())
read(pool);
else
{
// GUTF8String full_name=GOS::expand_name(name);
// GUTF8String dir_name=GOS::dirname(GOS::url_to_filename(url.base()));
GURL dirbase=url.base();
data.empty();
GPList<DjVmDir::File> files_list=dir->get_files_list();
for(GPosition pos=files_list;pos;++pos)
{
DjVmDir::File * f=files_list[pos];
DEBUG_MSG("reading contents of file '" << f->get_load_name() << "'\n");
const GURL::UTF8 url(f->get_load_name(),dirbase);
data[f->get_load_name()]=DataPool::create(url);
}
}
}
void
DjVmDoc::write_index(const GP<ByteStream> &str)
{
DEBUG_MSG("DjVmDoc::write_index(): Storing DjVm index file\n");
DEBUG_MAKE_INDENT(3);
GPList<DjVmDir::File> files_list=dir->get_files_list();
for(GPosition pos=files_list;pos;++pos)
{
GP<DjVmDir::File> file=files_list[pos];
file->offset=0;
GPosition data_pos=data.contains(file->get_load_name());
if (!data_pos)
G_THROW( ERR_MSG("DjVmDoc.no_data") "\t" + file->get_load_name());
file->size=data[data_pos]->get_length();
if (!file->size)
G_THROW( ERR_MSG("DjVmDoc.zero_file") );
}
GP<IFFByteStream> giff=IFFByteStream::create(str);
IFFByteStream &iff=*giff;
iff.put_chunk("FORM:DJVM", 1);
iff.put_chunk("DIRM");
dir->encode(iff.get_bytestream());
iff.close_chunk();
if (nav)
{
iff.put_chunk("NAVM");
nav->encode(iff.get_bytestream());
iff.close_chunk();
}
iff.close_chunk();
iff.flush();
}
void
DjVmDoc::save_page(
const GURL &codebase, const DjVmDir::File &file) const
{
GMap<GUTF8String,GUTF8String> incl;
save_file(codebase,file,&incl);
}
void
DjVmDoc::save_page(
const GURL &codebase, const DjVmDir::File &file,
GMap<GUTF8String,GUTF8String> &incl ) const
{
save_file(codebase,file,&incl);
}
void
DjVmDoc::save_file(
const GURL &codebase, const DjVmDir::File &file) const
{
save_file(codebase,file,0);
}
GUTF8String
DjVmDoc::save_file(const GURL &codebase, const DjVmDir::File &file,
GMap<GUTF8String,GUTF8String> &incl, const GP<DataPool> &pool) const
{
const GUTF8String save_name(file.get_save_name());
const GURL::UTF8 new_url(save_name,codebase);
DEBUG_MSG("storing file '"<<new_url<<"'\n");
DataPool::load_file(new_url);
const GP<ByteStream> str_in(pool->get_stream());
const GP<ByteStream> str_out(ByteStream::create(new_url, "wb"));
::save_file( *IFFByteStream::create(str_in),
*IFFByteStream::create(str_out), *dir, incl);
return save_name;
}
void
DjVmDoc::save_file(
const GURL &codebase, const DjVmDir::File &file,
GMap<GUTF8String,GUTF8String> *incl) const
{
const GUTF8String load_name=file.get_load_name();
if(!incl || !incl->contains(load_name))
{
GMap<GUTF8String,GUTF8String> new_incl;
const GUTF8String save_name(
save_file(codebase,file,new_incl,get_data(load_name)));
if(incl)
{
(*incl)[load_name]=save_name;
for(GPosition pos=new_incl;pos;++pos)
{
save_file(codebase,file,incl);
}
}
}
}
void
DjVmDoc::expand(const GURL &codebase, const GUTF8String &idx_name)
{
DEBUG_MSG("DjVmDoc::expand(): Expanding into '" << codebase << "'\n");
DEBUG_MAKE_INDENT(3);
// Resolve any name conflicts
// Find the list of all files.
GPList<DjVmDir::File> files_list=dir->resolve_duplicates(false);
// store each file
for(GPosition pos=files_list;pos;++pos)
{
save_file(codebase,*files_list[pos]);
}
if (idx_name.length())
{
const GURL::UTF8 idx_url(idx_name, codebase);
DEBUG_MSG("storing index file '" << idx_url << "'\n");
DataPool::load_file(idx_url);
GP<ByteStream> str=ByteStream::create(idx_url, "wb");
write_index(str);
}
}
#ifdef HAVE_NAMESPACES
}
# ifndef NOT_USING_DJVU_NAMESPACE
using namespace DJVU;
# endif
#endif
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