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tdegraphics/kviewshell/plugins/djvu/libdjvu/DjVuDocument.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: DjVuDocument.cpp,v 1.13 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 "DjVuDocument.h"
#include "DjVmDoc.h"
#include "DjVmDir0.h"
#include "DjVmNav.h"
#include "DjVuNavDir.h"
#include "DjVuImage.h"
#include "DjVuFileCache.h"
#include "IFFByteStream.h"
#include "GOS.h"
#include "DataPool.h"
#include "IW44Image.h"
#include "GRect.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};
const float DjVuDocument::thumb_gamma=(float)2.20;
void (* DjVuDocument::djvu_import_codec)(
GP<DataPool> &pool, const GURL &url, bool &needs_compression,
bool &needs_rename )=0;
void (* DjVuDocument::djvu_compress_codec)(
GP<ByteStream> &doc,const GURL &where,bool bundled)=0;
void
DjVuDocument::set_import_codec(
void (*codec)(
GP<DataPool> &pool, const GURL &url, bool &needs_compression, bool &needs_rename ))
{
djvu_import_codec=codec;
}
void
DjVuDocument::set_compress_codec(
void (* codec)(
GP<ByteStream> &doc,const GURL &where,bool bundled))
{
djvu_compress_codec=codec;
}
DjVuDocument::DjVuDocument(void)
: doc_type(UNKNOWN_TYPE),
needs_compression_flag(false),
can_compress_flag(false),
needs_rename_flag(false),
has_url_names(false),
recover_errors(ABORT),
verbose_eof(false),
init_started(false),
cache(0)
{
}
GP<DjVuDocument>
DjVuDocument::create(
GP<DataPool> pool, GP<DjVuPort> xport, DjVuFileCache * const xcache)
{
DjVuDocument *doc=new DjVuDocument;
GP<DjVuDocument> retval=doc;
doc->init_data_pool=pool;
doc->start_init(GURL(),xport,xcache);
return retval;
}
GP<DjVuDocument>
DjVuDocument::create(
const GP<ByteStream> &bs, GP<DjVuPort> xport, DjVuFileCache * const xcache)
{
return create(DataPool::create(bs),xport,xcache);
}
GP<DjVuDocument>
DjVuDocument::create_wait(
const GURL &url, GP<DjVuPort> xport, DjVuFileCache * const xcache)
{
GP<DjVuDocument> retval=create(url,xport,xcache);
retval->wait_for_complete_init();
return retval;
}
void
DjVuDocument::start_init(
const GURL & url, GP<DjVuPort> xport, DjVuFileCache * xcache)
{
DEBUG_MSG("DjVuDocument::start_init(): initializing class...\n");
DEBUG_MAKE_INDENT(3);
if (init_started)
G_THROW( ERR_MSG("DjVuDocument.2nd_init") );
if (!get_count())
G_THROW( ERR_MSG("DjVuDocument.not_secure") );
if(url.is_empty())
{
if (!init_data_pool)
G_THROW( ERR_MSG("DjVuDocument.empty_url") );
if(init_url.is_empty())
{
init_url=invent_url("document.djvu");
}
}else
{
init_url=url;
}
// Initialize
cache=xcache;
doc_type=UNKNOWN_TYPE;
DjVuPortcaster * pcaster=get_portcaster();
if (!xport)
xport=simple_port=new DjVuSimplePort();
pcaster->add_route(this, xport);
pcaster->add_route(this, this);
if(!url.is_empty())
{
init_data_pool=pcaster->request_data(this, init_url);
if(init_data_pool)
{
if(!init_url.is_empty() && init_url.is_local_file_url() && djvu_import_codec)
{
djvu_import_codec(init_data_pool,init_url,needs_compression_flag,needs_rename_flag);
}
if(needs_rename_flag)
can_compress_flag=true;
}
if (!init_data_pool)
{
G_THROW( ERR_MSG("DjVuDocument.fail_URL") "\t"+init_url.get_string());
}
}
// Now we say it is ready
init_started=true;
init_thread_flags=STARTED;
init_life_saver=this;
init_thr.create(static_init_thread, this);
}
DjVuDocument::~DjVuDocument(void)
{
// No more messages, please. We're being destroyed.
get_portcaster()->del_port(this);
// We want to stop any DjVuFile which has been created by us
// and is still being decoded. We have to stop them manually because
// they keep the "life saver" in the decoding thread and won't stop
// when we clear the last reference to them
{
GCriticalSectionLock lock(&ufiles_lock);
for(GPosition pos=ufiles_list;pos;++pos)
{
GP<DjVuFile> file=ufiles_list[pos]->file;
file->stop_decode(false);
file->stop(false); // Disable any access to data
}
ufiles_list.empty();
}
GPList<DjVuPort> ports=get_portcaster()->prefix_to_ports(get_int_prefix());
for(GPosition pos=ports;pos;++pos)
{
GP<DjVuPort> port=ports[pos];
if (port->inherits("DjVuFile"))
{
DjVuFile * file=(DjVuFile *) (DjVuPort *) port;
file->stop_decode(false);
file->stop(false); // Disable any access to data
}
}
DataPool::close_all();
}
void
DjVuDocument::stop_init(void)
{
DEBUG_MSG("DjVuDocument::stop_init(): making sure that the init thread dies.\n");
DEBUG_MAKE_INDENT(3);
GMonitorLock lock(&init_thread_flags);
while((init_thread_flags & STARTED) &&
!(init_thread_flags & FINISHED))
{
if (init_data_pool) init_data_pool->stop(true); // blocking operation
if (ndir_file) ndir_file->stop(false);
{
GCriticalSectionLock lock(&ufiles_lock);
for(GPosition pos=ufiles_list;pos;++pos)
ufiles_list[pos]->file->stop(false); // Disable any access to data
ufiles_list.empty();
}
init_thread_flags.wait(50);
}
}
void
DjVuDocument::check() const
{
if (!init_started)
G_THROW( ERR_MSG("DjVuDocument.not_init") );
}
void
DjVuDocument::static_init_thread(void * cl_data)
{
DjVuDocument * th=(DjVuDocument *) cl_data;
GP<DjVuDocument> life_saver=th;
th->init_life_saver=0;
G_TRY {
th->init_thread();
} G_CATCH(exc) {
th->flags|=DjVuDocument::DOC_INIT_FAILED;
G_TRY {
th->check_unnamed_files();
if (!exc.cmp_cause(ByteStream::EndOfFile) && th->verbose_eof)
get_portcaster()->notify_error(th, ERR_MSG("DjVuDocument.init_eof") );
else if (!exc.cmp_cause(DataPool::Stop))
get_portcaster()->notify_status(th, ERR_MSG("DjVuDocument.stopped") );
else
get_portcaster()->notify_error(th, exc.get_cause());
} G_CATCH_ALL {} G_ENDCATCH;
th->init_thread_flags|=FINISHED;
} G_ENDCATCH;
}
void
DjVuDocument::init_thread(void)
// This function is run in a separate thread.
// The goal is to detect the document type (BUNDLED, OLD_INDEXED, etc.)
// and decode navigation directory.
{
DEBUG_MSG("DjVuDocument::init_thread(): guessing what we're dealing with\n");
DEBUG_MAKE_INDENT(3);
DjVuPortcaster * pcaster=get_portcaster();
GP<ByteStream> stream=init_data_pool->get_stream();
GP<IFFByteStream> giff=IFFByteStream::create(stream);
IFFByteStream &iff=*giff;
GUTF8String chkid;
int size=iff.get_chunk(chkid);
if (!size)
G_THROW( ByteStream::EndOfFile );
if (size < 0)
G_THROW( ERR_MSG("DjVuDocument.no_file") );
if (size<8)
{
G_THROW( ERR_MSG("DjVuDocument.not_DjVu") );
}
if (chkid=="FORM:DJVM")
{
DEBUG_MSG("Got DJVM document here\n");
DEBUG_MAKE_INDENT(3);
size=iff.get_chunk(chkid);
if (chkid=="DIRM")
{
djvm_dir=DjVmDir::create();
djvm_dir->decode(iff.get_bytestream());
iff.close_chunk();
if (djvm_dir->is_bundled())
{
DEBUG_MSG("Got BUNDLED file.\n");
doc_type=BUNDLED;
}
else
{
DEBUG_MSG("Got INDIRECT file.\n");
doc_type=INDIRECT;
}
flags|=DOC_TYPE_KNOWN | DOC_DIR_KNOWN;
pcaster->notify_doc_flags_changed(this, DOC_TYPE_KNOWN | DOC_DIR_KNOWN, 0);
check_unnamed_files();
/* Check for NAVM */
size=iff.get_chunk(chkid);
if (size && chkid=="NAVM")
{
djvm_nav=DjVmNav::create();
djvm_nav->decode(iff.get_bytestream());
iff.close_chunk();
}
}
else if (chkid=="DIR0")
{
DEBUG_MSG("Got OLD_BUNDLED file.\n");
doc_type=OLD_BUNDLED;
flags|=DOC_TYPE_KNOWN;
pcaster->notify_doc_flags_changed(this, DOC_TYPE_KNOWN, 0);
check_unnamed_files();
}
else
G_THROW( ERR_MSG("DjVuDocument.bad_format") );
if (doc_type==OLD_BUNDLED)
{
// Read the DjVmDir0 directory. We are unable to tell what
// files are pages and what are included at this point.
// We only know that the first file with DJVU (BM44 or PM44)
// form *is* the first page. The rest will become known
// after we decode DjVuNavDir
djvm_dir0=DjVmDir0::create();
djvm_dir0->decode(*iff.get_bytestream());
iff.close_chunk();
// Get offset to the first DJVU, PM44 or BM44 chunk
int first_page_offset=0;
while(!first_page_offset)
{
int offset;
size=iff.get_chunk(chkid, &offset);
if (size==0) G_THROW( ERR_MSG("DjVuDocument.no_page") );
if (chkid=="FORM:DJVU" || chkid=="FORM:PM44" || chkid=="FORM:BM44")
{
DEBUG_MSG("Got 1st page offset=" << offset << "\n");
first_page_offset=offset;
}
iff.close_chunk();
}
// Now get the name of this file
int file_num;
for(file_num=0;file_num<djvm_dir0->get_files_num();file_num++)
{
DjVmDir0::FileRec & file=*djvm_dir0->get_file(file_num);
if (file.offset==first_page_offset)
{
first_page_name=file.name;
break;
}
}
if (!first_page_name.length())
G_THROW( ERR_MSG("DjVuDocument.no_page") );
flags|=DOC_DIR_KNOWN;
pcaster->notify_doc_flags_changed(this, DOC_DIR_KNOWN, 0);
check_unnamed_files();
}
}
else // chkid!="FORM:DJVM"
{
// DJVU format
DEBUG_MSG("Got DJVU OLD_INDEXED or SINGLE_PAGE document here.\n");
doc_type=SINGLE_PAGE;
flags|=DOC_TYPE_KNOWN;
pcaster->notify_doc_flags_changed(this, DOC_TYPE_KNOWN, 0);
check_unnamed_files();
}
if (doc_type==OLD_BUNDLED || doc_type==SINGLE_PAGE)
{
DEBUG_MSG("Searching for NDIR chunks...\n");
ndir_file=get_djvu_file(-1);
if (ndir_file) ndir=ndir_file->decode_ndir();
ndir_file=0; // Otherwise ~DjVuDocument() will stop (=kill) it
if (!ndir)
{
// Seems to be 1-page old-style document. Create dummy NDIR
if (doc_type==OLD_BUNDLED)
{
ndir=DjVuNavDir::create(GURL::UTF8("directory",init_url));
ndir->insert_page(-1, first_page_name);
}
else
{
ndir=DjVuNavDir::create(GURL::UTF8("directory",init_url.base()));
ndir->insert_page(-1, init_url.fname());
}
}
else
{
if (doc_type==SINGLE_PAGE)
doc_type=OLD_INDEXED;
}
flags|=DOC_NDIR_KNOWN;
pcaster->notify_doc_flags_changed(this, DOC_NDIR_KNOWN, 0);
check_unnamed_files();
}
flags|=DOC_INIT_OK;
pcaster->notify_doc_flags_changed(this, DOC_INIT_OK, 0);
check_unnamed_files();
init_thread_flags|=FINISHED;
DEBUG_MSG("DOCUMENT IS FULLY INITIALIZED now: doc_type='" <<
(doc_type==BUNDLED ? "BUNDLED" :
doc_type==OLD_BUNDLED ? "OLD_BUNDLED" :
doc_type==INDIRECT ? "INDIRECT" :
doc_type==OLD_INDEXED ? "OLD_INDEXED" :
doc_type==SINGLE_PAGE ? "SINGLE_PAGE" :
"UNKNOWN") << "'\n");
}
bool
DjVuDocument::wait_for_complete_init(void)
{
flags.enter();
while(!(flags & DOC_INIT_FAILED) &&
!(flags & DOC_INIT_OK)) flags.wait();
flags.leave();
init_thread_flags.enter();
while (!(init_thread_flags & FINISHED))
init_thread_flags.wait();
init_thread_flags.leave();
return (flags & (DOC_INIT_OK | DOC_INIT_FAILED))!=0;
}
int
DjVuDocument::wait_get_pages_num(void) const
{
GSafeFlags &f=const_cast<GSafeFlags &>(flags);
f.enter();
while(!(f & DOC_TYPE_KNOWN) &&
!(f & DOC_INIT_FAILED) &&
!(f & DOC_INIT_OK)) f.wait();
f.leave();
return get_pages_num();
}
GUTF8String
DjVuDocument::get_int_prefix(void) const
{
// These NAMEs are used to enable DjVuFile sharing inside the same
// DjVuDocument using DjVuPortcaster. Since URLs are unique to the
// document, other DjVuDocuments cannot retrieve files until they're
// assigned some permanent name. After '?' there should be the real
// file's URL. Please note, that output of this function is used only
// as name for DjVuPortcaster. Not as a URL.
GUTF8String retval;
return retval.format("document_%p%d?", this, hash(init_url));
}
void
DjVuDocument::set_file_aliases(const DjVuFile * file)
{
DEBUG_MSG("DjVuDocument::set_file_aliases(): setting global aliases for file '"
<< file->get_url() << "'\n");
DEBUG_MAKE_INDENT(3);
DjVuPortcaster * pcaster=DjVuPort::get_portcaster();
GMonitorLock lock(&((DjVuFile *) file)->get_safe_flags());
pcaster->clear_aliases(file);
if (file->is_decode_ok() && cache)
{
// If file is successfully decoded and caching is enabled,
// assign a global alias to this file, so that any other
// DjVuDocument will be able to use it.
pcaster->add_alias(file, file->get_url().get_string());
if (flags & (DOC_NDIR_KNOWN | DOC_DIR_KNOWN))
{
int page_num=url_to_page(file->get_url());
if (page_num>=0)
{
if (page_num==0) pcaster->add_alias(file, init_url.get_string()+"#-1");
pcaster->add_alias(file, init_url.get_string()+"#"+GUTF8String(page_num));
}
}
// The following line MUST stay here. For OLD_INDEXED documents
// a page may finish decoding before DIR or NDIR becomes known
// (multithreading, remember), so the code above would not execute
pcaster->add_alias(file, file->get_url().get_string()+"#-1");
} else pcaster->add_alias(file, get_int_prefix()+file->get_url());
}
void
DjVuDocument::check_unnamed_files(void)
{
DEBUG_MSG("DjVuDocument::check_unnamed_files(): Seeing if we can fix some...\n");
DEBUG_MAKE_INDENT(3);
if (flags & DOC_INIT_FAILED)
{
// Init failed. All unnamed files should be terminated
GCriticalSectionLock lock(&ufiles_lock);
for(GPosition pos=ufiles_list;pos;++pos)
{
GP<DjVuFile> file=ufiles_list[pos]->file;
file->stop_decode(true);
file->stop(false); // Disable any access to data
}
ufiles_list.empty();
return;
}
if ((flags & DOC_TYPE_KNOWN)==0)
return;
// See the list of unnamed files (created when there was insufficient
// information about DjVuDocument structure) and try to fix those,
// which can be fixed at this time
while(true)
{
DjVuPortcaster * pcaster=get_portcaster();
GP<UnnamedFile> ufile;
GURL new_url;
GPosition pos ;
GCriticalSectionLock lock(&ufiles_lock);
for(pos=ufiles_list;pos;)
{
G_TRY
{
GP<UnnamedFile> f=ufiles_list[pos];
if (f->id_type==UnnamedFile::ID)
new_url=id_to_url(f->id);
else
new_url=page_to_url(f->page_num);
if (!new_url.is_empty())
{
ufile=f;
// Don't take it off the list. We want to be
// able to stop the init from ~DjVuDocument();
//
// ufiles_list.del(pos);
break;
} else if (is_init_complete())
{
// No empty URLs are allowed at this point.
// We now know all information about the document
// and can determine if a page is inside it or not
f->data_pool->set_eof();
GUTF8String msg;
if (f->id_type==UnnamedFile::ID)
msg= ERR_MSG("DjVuDocument.miss_page_name") "\t"+f->id;
else
msg= ERR_MSG("DjVuDocument.miss_page_num") "\t"+GUTF8String(f->page_num);
G_THROW(msg);
}
++pos;
}
G_CATCH(exc)
{
pcaster->notify_error(this, exc.get_cause());
GP<DataPool> pool=ufiles_list[pos]->data_pool;
if (pool)
pool->stop();
GPosition this_pos=pos;
++pos;
ufiles_list.del(this_pos);
}
G_ENDCATCH;
}
if (ufile && !new_url.is_empty())
{
DEBUG_MSG("Fixing file: '" << ufile->url << "'=>'" << new_url << "'\n");
// Now, once we know its real URL we can request a real DataPool and
// can connect the DataPool owned by DjVuFile to that real one
// Note, that now request_data() will not play fool because
// we have enough information
G_TRY
{
if (ufile->data_pool)
{
GP<DataPool> new_pool=pcaster->request_data(ufile->file, new_url);
if(!new_pool)
G_THROW( ERR_MSG("DjVuDocument.fail_URL") "\t"+new_url.get_string());
ufile->data_pool->connect(new_pool);
}
ufile->file->set_name(new_url.fname());
ufile->file->move(new_url.base());
set_file_aliases(ufile->file);
}
G_CATCH(exc)
{
pcaster->notify_error(this, exc.get_cause());
}
G_ENDCATCH;
}
else
break;
// Remove the 'ufile' from the list
for(pos=ufiles_list;pos;++pos)
if (ufiles_list[pos]==ufile)
{
ufiles_list.del(pos);
break;
}
} // while(1)
}
int
DjVuDocument::get_pages_num(void) const
{
check();
if (flags & DOC_TYPE_KNOWN)
if (doc_type==BUNDLED || doc_type==INDIRECT)
return djvm_dir->get_pages_num();
else if (flags & DOC_NDIR_KNOWN)
return ndir->get_pages_num();
return 1;
}
GURL
DjVuDocument::page_to_url(int page_num) const
{
check();
DEBUG_MSG("DjVuDocument::page_to_url(): page_num=" << page_num << "\n");
DEBUG_MAKE_INDENT(3);
GURL url;
if (flags & DOC_TYPE_KNOWN)
switch(doc_type)
{
case SINGLE_PAGE:
case OLD_INDEXED:
{
if (page_num<0) url=init_url;
else if (flags & DOC_NDIR_KNOWN) url=ndir->page_to_url(page_num);
break;
}
case OLD_BUNDLED:
{
if (page_num<0) page_num=0;
if (page_num==0 && (flags & DOC_DIR_KNOWN))
url=GURL::UTF8(first_page_name,init_url);
else if (flags & DOC_NDIR_KNOWN)
url=ndir->page_to_url(page_num);
break;
}
case BUNDLED:
{
if (page_num<0)
page_num=0;
if (flags & DOC_DIR_KNOWN)
{
GP<DjVmDir::File> file=djvm_dir->page_to_file(page_num);
if (!file) G_THROW( ERR_MSG("DjVuDocument.big_num") );
url=GURL::UTF8(file->get_load_name(),init_url);
}
break;
}
case INDIRECT:
{
if (page_num<0) page_num=0;
if (flags & DOC_DIR_KNOWN)
{
GP<DjVmDir::File> file=djvm_dir->page_to_file(page_num);
if (!file)
G_THROW( ERR_MSG("DjVuDocument.big_num") );
url=GURL::UTF8(file->get_load_name(),init_url.base());
}
break;
}
default:
G_THROW( ERR_MSG("DjVuDocument.unk_type") );
}
return url;
}
int
DjVuDocument::url_to_page(const GURL & url) const
{
check();
DEBUG_MSG("DjVuDocument::url_to_page(): url='" << url << "'\n");
DEBUG_MAKE_INDENT(3);
int page_num=-1;
if (flags & DOC_TYPE_KNOWN)
switch(doc_type)
{
case SINGLE_PAGE:
case OLD_BUNDLED:
case OLD_INDEXED:
{
if (flags & DOC_NDIR_KNOWN) page_num=ndir->url_to_page(url);
break;
}
case BUNDLED:
{
if (flags & DOC_DIR_KNOWN)
{
GP<DjVmDir::File> file;
if (url.base()==init_url)
file=djvm_dir->id_to_file(url.fname());
if (file)
page_num=file->get_page_num();
}
break;
}
case INDIRECT:
{
if (flags & DOC_DIR_KNOWN)
{
GP<DjVmDir::File> file;
if (url.base()==init_url.base())
file=djvm_dir->id_to_file(url.fname());
if (file)
page_num=file->get_page_num();
}
break;
}
default:
G_THROW( ERR_MSG("DjVuDocument.unk_type") );
}
return page_num;
}
GURL
DjVuDocument::id_to_url(const GUTF8String & id) const
{
check();
DEBUG_MSG("DjVuDocument::id_to_url(): translating ID='" << id << "' to URL\n");
DEBUG_MAKE_INDENT(3);
if (flags & DOC_TYPE_KNOWN)
switch(doc_type)
{
case BUNDLED:
if (flags & DOC_DIR_KNOWN)
{
GP<DjVmDir::File> file=djvm_dir->id_to_file(id);
if (!file)
{
file=djvm_dir->name_to_file(id);
if (!file)
file=djvm_dir->title_to_file(id);
}
if (file)
return GURL::UTF8(file->get_load_name(),init_url);
}
break;
case INDIRECT:
if (flags & DOC_DIR_KNOWN)
{
GP<DjVmDir::File> file=djvm_dir->id_to_file(id);
if (!file)
{
file=djvm_dir->name_to_file(id);
if (!file)
file=djvm_dir->title_to_file(id);
}
if (file)
return GURL::UTF8(file->get_load_name(),init_url.base());
}
break;
case OLD_BUNDLED:
if (flags & DOC_DIR_KNOWN)
{
GP<DjVmDir0::FileRec> frec=djvm_dir0->get_file(id);
if (frec)
return GURL::UTF8(id,init_url);
}
break;
case OLD_INDEXED:
case SINGLE_PAGE:
return GURL::UTF8(id,init_url.base());
break;
}
return GURL();
}
GURL
DjVuDocument::id_to_url(const DjVuPort * source, const GUTF8String &id)
{
return id_to_url(id);
}
GP<DjVuFile>
DjVuDocument::url_to_file(const GURL & url, bool dont_create) const
// This function is private and is called from two places:
// id_to_file() and get_djvu_file() ONLY when the structure is known
{
check();
DEBUG_MSG("DjVuDocument::url_to_file(): url='" << url << "'\n");
DEBUG_MAKE_INDENT(3);
// Try DjVuPortcaster to find existing files.
DjVuPortcaster * pcaster=DjVuPort::get_portcaster();
GP<DjVuPort> port;
if (cache)
{
// First - fully decoded files
port=pcaster->alias_to_port(url.get_string());
if (port && port->inherits("DjVuFile"))
{
DEBUG_MSG("found fully decoded file using DjVuPortcaster\n");
return (DjVuFile *) (DjVuPort *) port;
}
}
// Second - internal files
port=pcaster->alias_to_port(get_int_prefix()+url);
if (port && port->inherits("DjVuFile"))
{
DEBUG_MSG("found internal file using DjVuPortcaster\n");
return (DjVuFile *) (DjVuPort *) port;
}
GP<DjVuFile> file;
if (!dont_create)
{
DEBUG_MSG("creating a new file\n");
file=DjVuFile::create(url,const_cast<DjVuDocument *>(this),recover_errors,verbose_eof);
const_cast<DjVuDocument *>(this)->set_file_aliases(file);
}
return file;
}
GP<DjVuFile>
DjVuDocument::get_djvu_file(int page_num, bool dont_create) const
{
check();
DEBUG_MSG("DjVuDocument::get_djvu_file(): request for page " << page_num << "\n");
DEBUG_MAKE_INDENT(3);
DjVuPortcaster * pcaster=DjVuPort::get_portcaster();
GURL url;
{
// I'm locking the flags because depending on what page_to_url()
// returns me, I'll be creating DjVuFile in different ways.
// And I don't want the situation to change between the moment I call
// id_to_url() and I actually create DjVuFile
GMonitorLock lock(&(const_cast<DjVuDocument *>(this)->flags));
url=page_to_url(page_num);
if (url.is_empty())
{
// If init is complete and url is empty, we know for sure, that
// smth is wrong with the page_num. So we can return ZERO.
// Otherwise we create a temporary file and wait for init to finish
if (is_init_complete()) return 0;
DEBUG_MSG("Structure is not known => check <doc_url>#<page_num> alias...\n");
GP<DjVuPort> port;
if (cache)
port=pcaster->alias_to_port(init_url.get_string()+"#"+GUTF8String(page_num));
if (!port || !port->inherits("DjVuFile"))
{
DEBUG_MSG("failed => invent dummy URL and proceed\n");
// Invent some dummy temporary URL. I don't care what it will
// be. I'll remember the page_num and will generate the correct URL
// after I learn what the document is
GUTF8String name("page");
name+=GUTF8String(page_num);
name+=".djvu";
url=invent_url(name);
GCriticalSectionLock(&(const_cast<DjVuDocument *>(this)->ufiles_lock));
for(GPosition pos=ufiles_list;pos;++pos)
{
GP<UnnamedFile> f=ufiles_list[pos];
if (f->url==url) return f->file;
}
GP<UnnamedFile> ufile=new UnnamedFile(UnnamedFile::PAGE_NUM, 0,
page_num, url, 0);
// We're adding the record to the list before creating the DjVuFile
// because DjVuFile::init() will call request_data(), and the
// latter should be able to find the record.
//
// We also want to keep ufiles_lock to make sure that when
// request_data() is called, the record is still there
const_cast<DjVuDocument *>(this)->ufiles_list.append(ufile);
GP<DjVuFile> file=
DjVuFile::create(url,const_cast<DjVuDocument *>(this),recover_errors,verbose_eof);
ufile->file=file;
return file;
} else url=((DjVuFile *) (DjVuPort *) port)->get_url();
}
}
GP<DjVuFile> file=url_to_file(url, dont_create);
if (file)
pcaster->add_route(file, const_cast<DjVuDocument *>(this));
return file;
}
GURL
DjVuDocument::invent_url(const GUTF8String &name) const
{
GUTF8String buffer;
buffer.format("djvufileurl://%p/%s", this, (const char *)name);
return GURL::UTF8(buffer);
}
GP<DjVuFile>
DjVuDocument::get_djvu_file(const GUTF8String& id, bool dont_create)
{
check();
DEBUG_MSG("DjVuDocument::get_djvu_file(): ID='" << id << "'\n");
DEBUG_MAKE_INDENT(3);
if (!id.length())
return get_djvu_file(-1);
// Integers are not supported, only ID's
// if (id.is_int())
// return get_djvu_file(id.toInt(),dont_create);
GURL url;
// I'm locking the flags because depending on what id_to_url()
// returns me, I'll be creating DjVuFile in different ways.
// And I don't want the situation to change between the moment I call
// id_to_url() and I actually create DjVuFile
{
GMonitorLock lock(&flags);
url=id_to_url(id);
if(url.is_empty() && !id.is_int())
{
// If init is complete, we know for sure, that there is no such
// file with ID 'id' in the document. Otherwise we have to
// create a temporary file and wait for the init to finish
if (is_init_complete())
return 0;
// Invent some dummy temporary URL. I don't care what it will
// be. I'll remember the ID and will generate the correct URL
// after I learn what the document is
url=invent_url(id);
DEBUG_MSG("Invented url='" << url << "'\n");
GCriticalSectionLock lock(&ufiles_lock);
for(GPosition pos=ufiles_list;pos;++pos)
{
GP<UnnamedFile> f=ufiles_list[pos];
if (f->url==url)
return f->file;
}
GP<UnnamedFile> ufile=new UnnamedFile(UnnamedFile::ID, id, 0, url, 0);
// We're adding the record to the list before creating the DjVuFile
// because DjVuFile::init() will call request_data(), and the
// latter should be able to find the record.
//
// We also want to keep ufiles_lock to make sure that when
// request_data() is called, the record is still there
ufiles_list.append(ufile);
GP<DjVuFile> file=DjVuFile::create(url,this,recover_errors,verbose_eof);
ufile->file=file;
return file;
}
}
return get_djvu_file(url,dont_create);
}
GP<DjVuFile>
DjVuDocument::get_djvu_file(const GURL& url, bool dont_create)
{
check();
DEBUG_MSG("DjVuDocument::get_djvu_file(): URL='" << url << "'\n");
DEBUG_MAKE_INDENT(3);
if (url.is_empty())
return 0;
const GP<DjVuFile> file(url_to_file(url, dont_create));
if (file)
get_portcaster()->add_route(file, this);
return file;
}
GP<DjVuImage>
DjVuDocument::get_page(int page_num, bool sync, DjVuPort * port) const
{
check();
DEBUG_MSG("DjVuDocument::get_page(): request for page " << page_num << "\n");
DEBUG_MAKE_INDENT(3);
GP<DjVuImage> dimg;
const GP<DjVuFile> file(get_djvu_file(page_num));
if (file)
{
dimg=DjVuImage::create(file);
if (port)
DjVuPort::get_portcaster()->add_route(dimg, port);
file->resume_decode();
if (dimg && sync)
dimg->wait_for_complete_decode();
}
return dimg;
}
GP<DjVuImage>
DjVuDocument::get_page(const GUTF8String &id, bool sync, DjVuPort * port)
{
check();
DEBUG_MSG("DjVuDocument::get_page(): ID='" << id << "'\n");
DEBUG_MAKE_INDENT(3);
GP<DjVuImage> dimg;
const GP<DjVuFile> file(get_djvu_file(id));
if(file)
{
dimg=DjVuImage::create(file);
if (port)
DjVuPort::get_portcaster()->add_route(dimg, port);
file->resume_decode();
if (dimg && sync)
dimg->wait_for_complete_decode();
}
return dimg;
}
void
DjVuDocument::process_threqs(void)
// Will look thru threqs_list and try to fulfil every request
{
GCriticalSectionLock lock(&threqs_lock);
for(GPosition pos=threqs_list;pos;)
{
GP<ThumbReq> req=threqs_list[pos];
bool remove=false;
if (req->thumb_file)
{
G_TRY {
// There is supposed to be a file with thumbnails
if (req->thumb_file->is_data_present())
{
// Cool, we can extract the thumbnail now
GP<ByteStream> str=req->thumb_file->get_init_data_pool()->get_stream();
GP<IFFByteStream> giff=IFFByteStream::create(str);
IFFByteStream &iff=*giff;
GUTF8String chkid;
if (!iff.get_chunk(chkid) || chkid!="FORM:THUM")
G_THROW( ERR_MSG("DjVuDocument.bad_thumb") );
for(int i=0;i<req->thumb_chunk;i++)
{
if (!iff.get_chunk(chkid))
G_THROW( ERR_MSG("DjVuDocument.bad_thumb") );
iff.close_chunk();
}
if (!iff.get_chunk(chkid) || chkid!="TH44")
G_THROW( ERR_MSG("DjVuDocument.bad_thumb") );
// Copy the data
char buffer[1024];
int length;
while((length=iff.read(buffer, 1024)))
req->data_pool->add_data(buffer, length);
req->data_pool->set_eof();
// Also add this file to cache so that we won't have
// to download it next time
add_to_cache(req->thumb_file);
req->thumb_file=0;
req->image_file=0;
remove=true;
}
} G_CATCH(exc) {
GUTF8String msg= ERR_MSG("DjVuDocument.cant_extract") "\n";
msg+=exc.get_cause();
get_portcaster()->notify_error(this, msg);
// Switch this request to the "decoding" mode
req->image_file=get_djvu_file(req->page_num);
req->thumb_file=0;
req->data_pool->set_eof();
remove=true;
} G_ENDCATCH;
} // if (req->thumb_file)
if (req->image_file)
{
G_TRY {
// Decode the file if necessary. Or just used predecoded image.
GSafeFlags & file_flags=req->image_file->get_safe_flags();
{
GMonitorLock lock(&file_flags);
if (!req->image_file->is_decoding())
{
if (req->image_file->is_decode_ok())
{
// We can generate it now
const GP<DjVuImage> dimg(DjVuImage::create(req->image_file));
dimg->wait_for_complete_decode();
int width = 160;
int height = 160;
if( dimg->get_width() )
width = dimg->get_width();
if( dimg->get_height() )
height = dimg->get_height();
GRect rect(0, 0, 160, height*160/width);
GP<GPixmap> pm=dimg->get_pixmap(rect, rect, thumb_gamma);
if (!pm)
{
GP<GBitmap> bm=dimg->get_bitmap(rect, rect, sizeof(int));
if(bm)
pm=GPixmap::create(*bm);
else
pm = GPixmap::create(rect.height(), rect.width(),
&GPixel::WHITE);
}
// Store and compress the pixmap
GP<IW44Image> iwpix=IW44Image::create_encode(*pm);
GP<ByteStream> gstr=ByteStream::create();
IWEncoderParms parms;
parms.slices=97;
parms.bytes=0;
parms.decibels=0;
iwpix->encode_chunk(gstr, parms);
TArray<char> data=gstr->get_data();
req->data_pool->add_data((const char *) data, data.size());
req->data_pool->set_eof();
req->thumb_file=0;
req->image_file=0;
remove=true;
} else if (req->image_file->is_decode_failed())
{
// Unfortunately we cannot decode it
req->thumb_file=0;
req->image_file=0;
req->data_pool->set_eof();
remove=true;
} else
{
req->image_file->start_decode();
}
}
}
} G_CATCH(exc) {
GUTF8String msg="Failed to decode thumbnails:\n";
msg+=exc.get_cause();
get_portcaster()->notify_error(this, msg);
// Get rid of this request
req->image_file=0;
req->thumb_file=0;
req->data_pool->set_eof();
remove=true;
} G_ENDCATCH;
}
if (remove)
{
GPosition this_pos=pos;
++pos;
threqs_list.del(this_pos);
} else ++pos;
}
}
GP<DjVuDocument::ThumbReq>
DjVuDocument::add_thumb_req(const GP<ThumbReq> & thumb_req)
// Will look through the list of pending requests for thumbnails
// and try to add the specified request. If a duplicate is found,
// it will be returned and the list will not be modified
{
GCriticalSectionLock lock(&threqs_lock);
for(GPosition pos=threqs_list;pos;++pos)
{
GP<ThumbReq> req=threqs_list[pos];
if (req->page_num==thumb_req->page_num)
return req;
}
threqs_list.append(thumb_req);
return thumb_req;
}
GList<GUTF8String>
DjVuDocument::get_id_list(void)
{
GList<GUTF8String> ids;
if (is_init_complete())
{
if(djvm_dir)
{
GPList<DjVmDir::File> files_list=djvm_dir->get_files_list();
for(GPosition pos=files_list;pos;++pos)
{
ids.append(files_list[pos]->get_load_name());
}
}else
{
const int page_num=get_pages_num();
for(int page=0;page<page_num;page++)
{
ids.append(page_to_url(page).fname());
}
}
}
return ids;
}
void
DjVuDocument::map_ids(GMap<GUTF8String,void *> &map)
{
GList<GUTF8String> ids=get_id_list();
for(GPosition pos=ids;pos;++pos)
{
map[ids[pos]]=0;
}
}
GP<DataPool>
DjVuDocument::get_thumbnail(int page_num, bool dont_decode)
{
DEBUG_MSG("DjVuDocument::get_thumbnail(): page_num=" << page_num << "\n");
DEBUG_MAKE_INDENT(3);
if (!is_init_complete()) return 0;
{
// See if we already have request for this thumbnail pending
GCriticalSectionLock lock(&threqs_lock);
for(GPosition pos=threqs_list;pos;++pos)
{
GP<ThumbReq> req=threqs_list[pos];
if (req->page_num==page_num)
return req->data_pool; // That's it. Just return it.
}
}
// No pending request for this page... Create one
GP<ThumbReq> thumb_req=new ThumbReq(page_num, DataPool::create());
// First try to find predecoded thumbnail
if (get_doc_type()==INDIRECT || get_doc_type()==BUNDLED)
{
// Predecoded thumbnails exist for new formats only
GPList<DjVmDir::File> files_list=djvm_dir->get_files_list();
GP<DjVmDir::File> thumb_file;
int thumb_start=0;
int page_cnt=-1;
for(GPosition pos=files_list;pos;++pos)
{
GP<DjVmDir::File> f=files_list[pos];
if (f->is_thumbnails())
{
thumb_file=f;
thumb_start=page_cnt+1;
} else if (f->is_page())
{
page_cnt++;
}
if (page_cnt==page_num) break;
}
if (thumb_file)
{
// That's the file with the desired thumbnail image
thumb_req->thumb_file=get_djvu_file(thumb_file->get_load_name());
thumb_req->thumb_chunk=page_num-thumb_start;
thumb_req=add_thumb_req(thumb_req);
process_threqs();
return thumb_req->data_pool;
}
}
// Apparently we're out of luck and need to decode the requested
// page (unless it's already done and if it's allowed) and render
// it into the thumbnail. If dont_decode is true, do not attempt
// to create this file (because this will result in a request for data)
GP<DjVuFile> file=get_djvu_file(page_num, dont_decode);
if (file)
{
thumb_req->image_file=file;
// I'm locking the flags here to make sure, that DjVuFile will not
// change its state in between of the checks.
GSafeFlags & file_flags=file->get_safe_flags();
{
GMonitorLock lock(&file_flags);
if (thumb_req->image_file->is_decode_ok() || !dont_decode)
{
// Just add it to the list and call process_threqs(). It
// will start decoding if necessary
thumb_req=add_thumb_req(thumb_req);
process_threqs();
} else
{
// Nothing can be done return ZERO
thumb_req=0;
}
}
} else thumb_req=0;
if (thumb_req) return thumb_req->data_pool;
else return 0;
}
static void
add_to_cache(const GP<DjVuFile> & f, GMap<GURL, void *> & map,
DjVuFileCache * cache)
{
GURL url=f->get_url();
DEBUG_MSG("DjVuDocument::add_to_cache(): url='" << url << "'\n");
DEBUG_MAKE_INDENT(3);
if (!map.contains(url))
{
map[url]=0;
cache->add_file(f);
GPList<DjVuFile> list;
for(GPosition pos=list;pos;++pos)
add_to_cache(list[pos], map, cache);
}
}
void
DjVuDocument::add_to_cache(const GP<DjVuFile> & f)
{
if (cache)
{
GMap<GURL, void *> map;
::add_to_cache(f, map, cache);
}
}
void
DjVuDocument::notify_file_flags_changed(const DjVuFile * source,
long set_tqmask, long clr_tqmask)
{
// Don't check here if the document is initialized or not.
// This function may be called when it's not.
// check();
if (set_tqmask & DjVuFile::DECODE_OK)
{
set_file_aliases(source);
if (cache) add_to_cache((DjVuFile *) source);
if(!needs_compression_flag)
{
if(source->needs_compression())
{
can_compress_flag=true;
needs_compression_flag=true;
}else if(source->can_compress())
{
can_compress_flag=true;
}
}
process_threqs();
}
if (set_tqmask & DjVuFile::DATA_PRESENT)
process_threqs(); // May be we can extract thumbnails now
}
GP<DjVuFile>
DjVuDocument::id_to_file(const DjVuPort * source, const GUTF8String &id)
{
return (DjVuFile *) get_djvu_file(id);
}
GP<DataPool>
DjVuDocument::request_data(const DjVuPort * source, const GURL & url)
{
DEBUG_MSG("DjVuDocument::request_data(): seeing if we can do it\n");
DEBUG_MAKE_INDENT(3);
if (url==init_url)
return init_data_pool;
check(); // Don't put it before 'init_data_pool'
{
// See if there is a file in the "UnnamedFiles" list.
// If it's there, then create an empty DataPool and store its
// pointer in the list. The "init thread" will eventually
// do smth with it.
GCriticalSectionLock lock(&ufiles_lock);
for(GPosition pos=ufiles_list;pos;++pos)
{
GP<UnnamedFile> f=ufiles_list[pos];
if (f->url==url)
{
DEBUG_MSG("Found tmp unnamed DjVuFile. Return empty DataPool\n");
// Remember the DataPool. We will connect it to the
// actual data after the document structure becomes known
f->data_pool=DataPool::create();
return f->data_pool;
}
}
}
// Well, the url is not in the "UnnamedFiles" list, but it doesn't
// mean, that it's not "artificial". Stay alert!
GP<DataPool> data_pool;
if (flags & DOC_TYPE_KNOWN)
switch(doc_type)
{
case OLD_BUNDLED:
{
if (flags & DOC_DIR_KNOWN)
{
DEBUG_MSG("The document is in OLD_BUNDLED format\n");
if (url.base()!=init_url)
G_THROW( ERR_MSG("DjVuDocument.URL_outside") "\t"+url.get_string());
GP<DjVmDir0::FileRec> file=djvm_dir0->get_file(url.fname());
if (!file)
{
G_THROW( ERR_MSG("DjVuDocument.file_outside") "\t"+url.fname());
}
data_pool=DataPool::create(init_data_pool, file->offset, file->size);
}
break;
}
case BUNDLED:
{
if (flags & DOC_DIR_KNOWN)
{
DEBUG_MSG("The document is in new BUNDLED format\n");
if (url.base()!=init_url)
{
G_THROW( ERR_MSG("DjVuDocument.URL_outside") "\t"
+url.get_string());
}
GP<DjVmDir::File> file=djvm_dir->id_to_file(url.fname());
if (!file)
{
G_THROW( ERR_MSG("DjVuDocument.file_outside") "\t"+url.fname());
}
data_pool=DataPool::create(init_data_pool, file->offset, file->size);
}
break;
}
case SINGLE_PAGE:
case OLD_INDEXED:
case INDIRECT:
{
DEBUG_MSG("The document is in SINGLE_PAGE or OLD_INDEXED or INDIRECT format\n");
if (flags & DOC_DIR_KNOWN)
if (doc_type==INDIRECT && !djvm_dir->id_to_file(url.fname()))
G_THROW( ERR_MSG("DjVuDocument.URL_outside2") "\t"+url.get_string());
if (url.is_local_file_url())
{
// GUTF8String fname=GOS::url_to_filename(url);
// if (GOS::basename(fname)=="-") fname="-";
DEBUG_MSG("url=" << url << "\n");
data_pool=DataPool::create(url);
}
}
}
return data_pool;
}
static void
add_file_to_djvm(const GP<DjVuFile> & file, bool page,
DjVmDoc & doc, GMap<GURL, void *> & map)
// This function is used only for obsolete formats.
// For new formats there is no need to process files recursively.
// All information is already available from the DJVM chunk
{
GURL url=file->get_url();
if (!map.contains(url))
{
map[url]=0;
if (file->get_chunks_number()>0 && !file->contains_chunk("NDIR"))
{
// Get the data and unlink any file containing NDIR chunk.
// Yes. We're lazy. We don't check if those files contain
// anything else.
GPosition pos;
GPList<DjVuFile> files_list=file->get_included_files(false);
GP<DataPool> data=file->get_djvu_data(false);
for(pos=files_list;pos;++pos)
{
GP<DjVuFile> f=files_list[pos];
if (f->contains_chunk("NDIR"))
data=DjVuFile::unlink_file(data, f->get_url().fname());
}
// Finally add it to the document
GUTF8String name=file->get_url().fname();
GP<DjVmDir::File> file_rec=DjVmDir::File::create(
name, name, name,
page ? DjVmDir::File::PAGE : DjVmDir::File::INCLUDE );
doc.insert_file(file_rec, data, -1);
// And repeat for all included files
for(pos=files_list;pos;++pos)
add_file_to_djvm(files_list[pos], false, doc, map);
}
}
}
static void
add_file_to_djvm(const GP<DjVuFile> & file, bool page,
DjVmDoc & doc, GMap<GURL, void *> & map,
bool &needs_compression_flag, bool &can_compress_flag )
{
if(!needs_compression_flag)
{
if(file->needs_compression())
{
can_compress_flag=true;
needs_compression_flag=true;
}else if(file->can_compress())
{
can_compress_flag=true;
}
}
add_file_to_djvm(file,page,doc,map);
}
static void
local_get_url_names(DjVuFile * f,const GMap<GURL, void *> & map,GMap<GURL,void *> &tmpmap)
{
GURL url=f->get_url();
if (!map.contains(url) && !tmpmap.contains(url))
{
tmpmap[url]=0;
f->process_incl_chunks();
GPList<DjVuFile> files_list=f->get_included_files(false);
for(GPosition pos=files_list;pos;++pos)
local_get_url_names(files_list[pos], map, tmpmap);
}
}
static void
local_get_url_names(DjVuFile * f, GMap<GURL, void *> & map)
{
GMap<GURL,void *> tmpmap;
local_get_url_names(f,map,tmpmap);
for(GPosition pos=tmpmap;pos;++pos)
map[tmpmap.key(pos)]=0;
}
GList<GURL>
DjVuDocument::get_url_names(void)
{
check();
GCriticalSectionLock lock(&url_names_lock);
if(has_url_names)
return url_names;
GMap<GURL, void *> map;
int i;
if (doc_type==BUNDLED || doc_type==INDIRECT)
{
GPList<DjVmDir::File> files_list=djvm_dir->get_files_list();
for(GPosition pos=files_list;pos;++pos)
{
GURL url=id_to_url(files_list[pos]->get_load_name());
map[url]=0;
}
}else
{
int pages_num=get_pages_num();
for(i=0;i<pages_num;i++)
{
G_TRY
{
local_get_url_names(get_djvu_file(i), map);
}
G_CATCH(ex)
{
// Why is this try/catch block here?
G_TRY {
get_portcaster()->notify_error(this, ex.get_cause());
GUTF8String emsg = ERR_MSG("DjVuDocument.exclude_page") "\t" + (i+1);
get_portcaster()->notify_error(this, emsg);
}
G_CATCH_ALL
{
G_RETHROW;
}
G_ENDCATCH;
}
G_ENDCATCH;
}
}
for(GPosition j=map;j;++j)
{
if (map.key(j).is_local_file_url())
{
url_names.append(map.key(j));
}
}
has_url_names=true;
return url_names;
}
GP<DjVmDoc>
DjVuDocument::get_djvm_doc()
// This function may block for data
{
check();
DEBUG_MSG("DjVuDocument::get_djvm_doc(): creating the DjVmDoc\n");
DEBUG_MAKE_INDENT(3);
if (!is_init_complete())
G_THROW( ERR_MSG("DjVuDocument.init_not_done") );
GP<DjVmDoc> doc=DjVmDoc::create();
if (doc_type==BUNDLED || doc_type==INDIRECT)
{
GPList<DjVmDir::File> files_list=djvm_dir->get_files_list();
for(GPosition pos=files_list;pos;++pos)
{
GP<DjVmDir::File> f=new DjVmDir::File(*files_list[pos]);
GP<DjVuFile> file=url_to_file(id_to_url(f->get_load_name()));
GP<DataPool> data;
if (file->is_modified())
data=file->get_djvu_data(false);
else
data=file->get_init_data_pool();
doc->insert_file(f, data);
}
if (djvm_nav)
doc->set_djvm_nav(djvm_nav);
}
else if (doc_type==SINGLE_PAGE)
{
DEBUG_MSG("Creating: djvm for a single page document.\n");
GMap<GURL, void *> map_add;
GP<DjVuFile> file=get_djvu_file(0);
add_file_to_djvm(file, true, *doc, map_add,
needs_compression_flag,can_compress_flag);
}
else
{
DEBUG_MSG("Converting: the document is in an old format.\n");
GMap<GURL, void *> map_add;
if(recover_errors == ABORT)
{
for(int page_num=0;page_num<ndir->get_pages_num();page_num++)
{
GP<DjVuFile> file=url_to_file(ndir->page_to_url(page_num));
add_file_to_djvm(file, true, *doc, map_add,
needs_compression_flag,can_compress_flag);
}
}
else
{
for(int page_num=0;page_num<ndir->get_pages_num();page_num++)
{
G_TRY
{
GP<DjVuFile> file=url_to_file(ndir->page_to_url(page_num));
add_file_to_djvm(file, true, *doc, map_add,
needs_compression_flag,can_compress_flag);
}
G_CATCH(ex)
{
G_TRY {
get_portcaster()->notify_error(this, ex.get_cause());
GUTF8String emsg = ERR_MSG("DjVuDocument.skip_page") "\t"
+ (page_num+1);
get_portcaster()->notify_error(this, emsg);
}
G_CATCH_ALL
{
G_RETHROW;
}
G_ENDCATCH;
}
G_ENDCATCH;
}
}
}
return doc;
}
void
DjVuDocument::write( const GP<ByteStream> &gstr,
const GMap<GUTF8String,void *> &reserved)
{
DEBUG_MSG("DjVuDocument::write(): storing DjVmDoc into ByteStream\n");
DEBUG_MAKE_INDENT(3);
get_djvm_doc()->write(gstr,reserved);
}
void
DjVuDocument::write(const GP<ByteStream> &gstr, bool force_djvm)
{
DEBUG_MSG("DjVuDocument::write(): storing DjVmDoc into ByteStream\n");
DEBUG_MAKE_INDENT(3);
GP<DjVmDoc> doc=get_djvm_doc();
GP<DjVmDir> dir=doc->get_djvm_dir();
if (force_djvm || dir->get_files_num()>1)
{
doc->write(gstr);
}else
{
GPList<DjVmDir::File> files_list=dir->resolve_duplicates(false);
GP<DataPool> pool=doc->get_data(files_list[files_list]->get_load_name());
GP<ByteStream> pool_str=pool->get_stream();
ByteStream &str=*gstr;
str.writall(octets,4);
str.copy(*pool_str);
}
}
void
DjVuDocument::expand(const GURL &codebase, const GUTF8String &idx_name)
{
DEBUG_MSG("DjVuDocument::expand(): codebase='" << codebase << "'\n");
DEBUG_MAKE_INDENT(3);
GP<DjVmDoc> doc=get_djvm_doc();
doc->expand(codebase, idx_name);
}
void
DjVuDocument::save_as(const GURL &where, const bool bundled)
{
DEBUG_MSG("DjVuDocument::save_as(): where='" << where <<
"', bundled=" << bundled << "\n");
DEBUG_MAKE_INDENT(3);
if (needs_compression())
{
if(!djvu_compress_codec)
{
G_THROW( ERR_MSG("DjVuDocument.comp_codec") );
}
GP<ByteStream> gmbs=ByteStream::create();
write(gmbs);
ByteStream &mbs=*gmbs;
mbs.flush();
mbs.seek(0,SEEK_SET);
(*djvu_compress_codec)(gmbs,where,bundled);
}else if (bundled)
{
DataPool::load_file(where);
write(ByteStream::create(where, "wb"));
} else
{
expand(where.base(), where.fname());
}
}
static const char prolog[]="<?xml version=\"1.0\" ?>\n<!DOCTYPE DjVuXML PUBLIC \"-//W3C//DTD DjVuXML 1.1//EN\" \"pubtext/DjVuXML-s.dtd\">\n<DjVuXML>\n<HEAD>";
static const char start_xml[]="</HEAD>\n<BODY>\n";
static const char end_xml[]="</BODY>\n</DjVuXML>\n";
void
DjVuDocument::writeDjVuXML(const GP<ByteStream> &gstr_out,int flags) const
{
ByteStream &str_out=*gstr_out;
str_out.writestring(
prolog+get_init_url().get_string().toEscaped()+start_xml);
const int pages=wait_get_pages_num();
for(int page_num=0;page_num<pages;++page_num)
{
const GP<DjVuImage> dimg(get_page(page_num,true));
if(!dimg)
{
G_THROW( ERR_MSG("DjVuToText.decode_failed") );
}
dimg->writeXML(str_out,get_init_url(),flags);
}
str_out.writestring(GUTF8String(end_xml));
}
#ifdef HAVE_NAMESPACES
}
# ifndef NOT_USING_DJVU_NAMESPACE
using namespace DJVU;
# endif
#endif
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