mirror of
https://invent.kde.org/graphics/okular
synced 2024-08-25 02:45:38 +00:00
![Tobias Koenig](/assets/img/avatar_default.png)
in presentation mode when the flag is available. svn path=/branches/kpdf_experiments/kdegraphics/kpdf/; revision=374668
707 lines
23 KiB
C++
707 lines
23 KiB
C++
/***************************************************************************
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* Copyright (C) 2004 by Enrico Ros <eros.kde@email.it> *
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* Copyright (C) 2004 by Albert Astals Cid <tsdgeos@terra.es> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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***************************************************************************/
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// qt/kde/system includes
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#include <qdir.h>
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#include <qfile.h>
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#include <qfileinfo.h>
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#include <qvaluevector.h>
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#include <qtimer.h>
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#include <qmap.h>
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#include <kdebug.h>
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#include <klocale.h>
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#include <kfinddialog.h>
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#include <kmessagebox.h>
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#include <kapplication.h>
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#include <kuserprofile.h>
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#include <kmimetype.h>
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#include <krun.h>
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// local includes
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#include "document.h"
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#include "page.h"
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#include "link.h"
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#include "settings.h"
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#include "generator_pdf.h" // PDF generator
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//#include "generator_ps.H" // PS generator
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// structures used internally by KPDFDocument for local variables storage
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class KPDFDocumentPrivate
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{
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public:
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// find related
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QString searchText;
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bool searchCase;
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int searchPage;
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// filtering related
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QString filterText;
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bool filterCase;
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// cached stuff
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int currentPage;
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// memory check/free timer
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QTimer * memCheckTimer;
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// observers related (note: won't delete oservers)
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QMap< int, class ObserverData* > observers;
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};
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struct ObserverData
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{
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// public data fields
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KPDFDocumentObserver * observer;
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QMap< int, int > pageMemory;
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int totalMemory;
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// public constructor: initialize data
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ObserverData( KPDFDocumentObserver * obs ) : observer( obs ), totalMemory( 0 ) {};
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};
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#define foreachObserver( cmd ) {\
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QMap< int, ObserverData * >::iterator it = d->observers.begin(), end = d->observers.end();\
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for ( ; it != end ; ++ it ) { (*it)->observer-> cmd ; } }
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KPDFDocument::KPDFDocument()
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: generator( 0 ), d( new KPDFDocumentPrivate )
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{
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d->currentPage = -1;
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d->searchPage = -1;
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d->memCheckTimer = new QTimer( this );
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connect( d->memCheckTimer, SIGNAL( timeout() ), this, SLOT( slotCheckMemory() ) );
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}
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KPDFDocument::~KPDFDocument()
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{
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closeDocument();
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delete d;
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}
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bool KPDFDocument::openDocument( const QString & docFile )
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{
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// docFile is always local so we can use QFile on it
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QFile fileReadTest( docFile );
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if ( !fileReadTest.open( IO_ReadOnly ) )
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return false;
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fileReadTest.close();
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// reset internal status and frees memory
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closeDocument();
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// create the generator based on the file's mimetype
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KMimeType::Ptr mime = KMimeType::findByPath( docFile );
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QString mimeName = mime->name();
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if ( mimeName == "application/pdf" )
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generator = new PDFGenerator();
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else if ( mimeName == "application/postscript" )
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kdError() << "PS generator not available" << endl;
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else
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{
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kdWarning() << "Unknown mimetype '" << mimeName << "'." << endl;
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return false;
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}
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// get notification of completed jobs
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connect( generator, SIGNAL( contentsChanged( int, int ) ),
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this, SLOT( slotGeneratedContents( int, int ) ) );
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// ask generator to open the document and return if unsuccessfull
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documentFileName = docFile;
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bool openOk = generator->loadDocument( docFile, pages_vector );
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if ( !openOk )
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return false;
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// start memory check timer
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d->memCheckTimer->start( 1000 );
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// check local directory for an overlay xml
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// TODO import overlay layers from XML
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// QString fileName = docFile.contains('/') ? docFile.section('/', -1, -1) : docFile;
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// fileName = "kpdf/" + QString::number(fileSize) + "." + fileName + ".xml";
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// QString localFN = locateLocal( "data", fileName );
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// kdDebug() << "Using '" << localFN << "' as overlay descriptor." << endl;
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// filter pages, setup observers and set the first page as current
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if ( pages_vector.size() > 0 )
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{
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processPageList( true );
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setCurrentPage( 0 );
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}
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return true;
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}
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void KPDFDocument::closeDocument()
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{
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// stop memory check timer
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d->memCheckTimer->stop();
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// delete pages and clear 'pages_vector' container
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for ( uint i = 0; i < pages_vector.count() ; i++ )
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delete pages_vector[i];
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pages_vector.clear();
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// send an empty list to observers (to free their data)
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foreachObserver( pageSetup( pages_vector, true ) );
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// clear memory management data
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QMap< int, ObserverData * >::iterator oIt = d->observers.begin(), oEnd = d->observers.end();
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for ( ; oIt != oEnd ; ++oIt )
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{
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ObserverData * observerData = *oIt;
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observerData->pageMemory.clear();
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observerData->totalMemory = 0;
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}
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// delete contents generator
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delete generator;
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generator = 0;
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// reset internal variables
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d->currentPage = -1;
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d->searchPage = -1;
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}
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void KPDFDocument::addObserver( KPDFDocumentObserver * pObserver )
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{
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// keep the pointer to the observer in a map
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d->observers[ pObserver->observerId() ] = new ObserverData( pObserver );
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// if the observer is added while a document is already opened, tell it
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if ( !pages_vector.isEmpty() )
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pObserver->pageSetup( pages_vector, true );
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}
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void KPDFDocument::removeObserver( KPDFDocumentObserver * pObserver )
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{
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// remove observer from the map. it won't receive notifications anymore
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if ( d->observers.contains( pObserver->observerId() ) )
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{
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// free observer data
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int observerId = pObserver->observerId();
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QValueVector<KPDFPage*>::iterator it = pages_vector.begin(), end = pages_vector.end();
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for ( ; it != end; ++it )
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(*it)->deletePixmap( observerId );
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// delete observer
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delete d->observers[ observerId ];
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d->observers.remove( observerId );
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}
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}
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void KPDFDocument::reparseConfig()
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{
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// reparse generator config and if something changed clear KPDFPages
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if ( generator && generator->reparseConfig() )
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{
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// invalidate pixmaps and send reload signals to observers
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QValueVector<KPDFPage*>::iterator it = pages_vector.begin(), end = pages_vector.end();
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for ( ; it != end; ++it )
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(*it)->deletePixmapsAndRects();
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foreachObserver( notifyPixmapsCleared() );
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}
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}
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const DocumentInfo * KPDFDocument::documentInfo() const
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{
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return generator ? generator->documentInfo() : NULL;
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}
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const DocumentSynopsis * KPDFDocument::documentSynopsis() const
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{
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return generator ? generator->documentSynopsis() : NULL;
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}
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const KPDFPage * KPDFDocument::page( uint n ) const
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{
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return ( n < pages_vector.count() ) ? pages_vector[n] : 0;
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}
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uint KPDFDocument::currentPage() const
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{
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return d->currentPage;
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}
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uint KPDFDocument::pages() const
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{
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return pages_vector.size();
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}
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bool KPDFDocument::okToPrint() const
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{
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return generator ? generator->allowed( Generator::Print ) : false;
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}
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QString KPDFDocument::getMetaData( const QString &key ) const
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{
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return generator ? generator->getMetaData( key ) : QString();
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}
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void KPDFDocument::requestPixmaps( const QValueList< PixmapRequest * > & requests, bool async )
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{
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if ( !generator )
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return;
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QValueList< PixmapRequest * >::const_iterator rIt = requests.begin(), rEnd = requests.end();
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for ( ; rIt != rEnd; ++rIt )
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{
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// set the 'page field' (see PixmapRequest) and check if request is valid
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PixmapRequest * request = *rIt;
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request->page = pages_vector[ request->pageNumber ];
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if ( !request->page || request->page->width() < 1 || request->page->height() < 1 )
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continue;
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// 1. Update statistics (pageMemory / totalMemory) adding this pixmap
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ObserverData * obs = d->observers[ request->id ];
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int pageNumber = request->pageNumber;
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if ( obs->pageMemory.contains( pageNumber ) )
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obs->totalMemory -= obs->pageMemory[ pageNumber ];
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int pixmapMemory = 4 * request->width * request->height / 1024;
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obs->pageMemory[ pageNumber ] = pixmapMemory;
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obs->totalMemory += pixmapMemory;
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// 2. Perform pre-cleaning if needed
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mCleanupMemory( request->id );
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// 3. Enqueue to Generator (that takes ownership of request)
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generator->requestPixmap( request, Settings::disableThreading() ? false : async );
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}
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}
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void KPDFDocument::requestTextPage( uint page )
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{
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KPDFPage * kp = pages_vector[ page ];
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if ( !generator || !kp )
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return;
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// Memory management for TextPages
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generator->requestTextPage( kp );
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}
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void KPDFDocument::setCurrentPage( int page, const QRect & viewport )
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{
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if ( page < 0 )
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page = 0;
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else if ( page > (int)pages_vector.count() )
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page = pages_vector.count() - 1;
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if ( page == d->currentPage )
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return;
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d->currentPage = page;
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foreachObserver( pageSetCurrent( page, viewport ) );
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}
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void KPDFDocument::findText( const QString & string, bool keepCase )
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{
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// turn selection drawing off on filtered pages
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if ( !d->filterText.isEmpty() )
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unHilightPages();
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// save params for the 'find next' case
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if ( !string.isEmpty() )
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{
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d->searchText = string;
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d->searchCase = keepCase;
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}
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// continue checking last SearchPage first (if it is the current page)
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int currentPage = d->currentPage;
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int pageCount = pages_vector.count();
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KPDFPage * foundPage = 0,
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* lastPage = (d->searchPage > -1) ? pages_vector[ d->searchPage ] : 0;
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if ( lastPage && d->searchPage == currentPage )
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if ( lastPage->hasText( d->searchText, d->searchCase, false ) )
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foundPage = lastPage;
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else
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{
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lastPage->clearAttribute( KPDFPage::Highlight );
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currentPage++;
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pageCount--;
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}
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if ( !foundPage )
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// loop through the whole document
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for ( int i = 0; i < pageCount; i++ )
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{
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if ( currentPage >= pageCount )
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{
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if ( KMessageBox::questionYesNo(0, i18n("End of document reached.\nContinue from the beginning?")) == KMessageBox::Yes )
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currentPage = 0;
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else
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break;
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}
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KPDFPage * page = pages_vector[ currentPage ];
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if ( !page->hasSearchPage() )
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requestTextPage( page->number() );
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if ( page->hasText( d->searchText, d->searchCase, true ) )
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{
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foundPage = page;
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break;
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}
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currentPage++;
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}
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if ( foundPage )
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{
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int pageNumber = foundPage->number();
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d->searchPage = pageNumber;
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foundPage->setAttribute( KPDFPage::Highlight );
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setCurrentPage( pageNumber );
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foreachObserver( notifyPixmapChanged( pageNumber ) );
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}
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else
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KMessageBox::information( 0, i18n("No matches found for '%1'.").arg(d->searchText) );
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}
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void KPDFDocument::findTextAll( const QString & pattern, bool keepCase )
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{
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// if pattern is null, clear 'hilighted' attribute in all pages
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if ( pattern.isEmpty() )
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unHilightPages();
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// cache search pattern and perform a linear search/mark
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d->filterText = pattern;
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d->filterCase = keepCase;
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processPageList( false );
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}
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void KPDFDocument::toggleBookmark( int n )
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{
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KPDFPage * page = ( n < (int)pages_vector.count() ) ? pages_vector[ n ] : 0;
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if ( page )
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{
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page->toggleAttribute( KPDFPage::Bookmark );
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foreachObserver( notifyPixmapChanged( n ) );
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}
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}
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void KPDFDocument::processLink( const KPDFLink * link )
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{
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if ( !link )
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return;
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switch( link->linkType() )
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{
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case KPDFLink::Goto: {
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const KPDFLinkGoto * go = static_cast< const KPDFLinkGoto * >( link );
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KPDFLinkGoto::Viewport destVp = go->destViewport();
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// first open filename if link is pointing outside this document
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if ( go->isExternal() && !openRelativeFile( go->fileName() ) )
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{
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kdWarning() << "Link: Error opening '" << go->fileName() << "'." << endl;
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return;
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}
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// note: if external file is opened, 'link' doesn't exist anymore!
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setCurrentPage( destVp.page ); //TODO implement and use Viewport
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} break;
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case KPDFLink::Execute: {
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const KPDFLinkExecute * exe = static_cast< const KPDFLinkExecute * >( link );
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QString fileName = exe->fileName();
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if ( fileName.endsWith( ".pdf" ) || fileName.endsWith( ".PDF" ) )
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{
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openRelativeFile( fileName );
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return;
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}
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// Albert: the only pdf i have that has that kind of link don't define
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// an application and use the fileName as the file to open
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fileName = giveAbsolutePath( fileName );
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KMimeType::Ptr mime = KMimeType::findByPath( fileName );
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// Check executables
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if ( KRun::isExecutableFile( fileName, mime->name() ) )
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{
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// Don't have any pdf that uses this code path, just a guess on how it should work
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if ( !exe->parameters().isEmpty() )
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{
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fileName = giveAbsolutePath( exe->parameters() );
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mime = KMimeType::findByPath( fileName );
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if ( KRun::isExecutableFile( fileName, mime->name() ) )
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{
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// this case is a link pointing to an executable with a parameter
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// that also is an executable, possibly a hand-crafted pdf
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KMessageBox::information( 0, i18n("The pdf file is trying to execute an external application and for your safety kpdf does not allow that.") );
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return;
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}
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}
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else
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{
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// this case is a link pointing to an executable with no parameters
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// core developers find unacceptable executing it even after asking the user
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KMessageBox::information( 0, i18n("The pdf file is trying to execute an external application and for your safety kpdf does not allow that.") );
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return;
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}
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}
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KService::Ptr ptr = KServiceTypeProfile::preferredService( mime->name(), "Application" );
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if ( ptr )
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{
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KURL::List lst;
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lst.append( fileName );
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KRun::run( *ptr, lst );
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}
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else
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KMessageBox::information( 0, i18n( "No application found for opening file of mimetype %1." ).arg( mime->name() ) );
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} break;
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case KPDFLink::Action: {
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const KPDFLinkAction * action = static_cast< const KPDFLinkAction * >( link );
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switch( action->actionType() )
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{
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case KPDFLinkAction::PageFirst:
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setCurrentPage( 0 );
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break;
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case KPDFLinkAction::PagePrev:
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if ( d->currentPage > 0 )
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setCurrentPage( d->currentPage - 1 );
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break;
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case KPDFLinkAction::PageNext:
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if ( d->currentPage < (int)pages_vector.count() - 1 )
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setCurrentPage( d->currentPage + 1 );
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break;
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case KPDFLinkAction::PageLast:
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setCurrentPage( pages_vector.count() - 1 );
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break;
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case KPDFLinkAction::HistoryBack:
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{} //TODO
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break;
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case KPDFLinkAction::HistoryForward:
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{} //TODO
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break;
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case KPDFLinkAction::Quit:
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kapp->quit();
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break;
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}
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} break;
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case KPDFLink::Browse: {
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const KPDFLinkBrowse * browse = static_cast< const KPDFLinkBrowse * >( link );
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// get service for web browsing TODO: check for "mailto:" links
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KService::Ptr ptr = KServiceTypeProfile::preferredService("text/html", "Application");
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KURL::List lst;
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// append 'url' parameter to the service and run it
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lst.append( browse->url() );
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KRun::run( *ptr, lst );
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} break;
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case KPDFLink::Movie:
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// TODO this
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break;
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}
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}
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bool KPDFDocument::print( KPrinter &printer )
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{
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return generator ? generator->print( printer ) : false;
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}
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void KPDFDocument::mCleanupMemory( int observerId )
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{
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// get observer data for given id
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ObserverData * obs = d->observers[ observerId ];
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// choose memory parameters based on configuration profile
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int clipValue = 0;
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int memoryToFree = 0;
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switch ( Settings::memoryLevel() )
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{
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case Settings::EnumMemoryLevel::Low:
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memoryToFree = obs->totalMemory;
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break;
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case Settings::EnumMemoryLevel::Normal:
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clipValue = obs->totalMemory - mFreeMemory() / 3;
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if ( observerId == THUMBNAILS_ID )
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memoryToFree = obs->totalMemory - mTotalMemory() / 20;
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else
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memoryToFree = obs->totalMemory - mTotalMemory() / 5;
|
|
break;
|
|
|
|
case Settings::EnumMemoryLevel::Aggressive:
|
|
clipValue = obs->totalMemory - mFreeMemory() / 2;
|
|
break;
|
|
}
|
|
|
|
if ( clipValue > memoryToFree )
|
|
memoryToFree = clipValue;
|
|
|
|
// free memory. remove older data until we free enough memory
|
|
int freed = 0;
|
|
if ( memoryToFree > 0 )
|
|
{
|
|
QMap< int, int >::iterator it = obs->pageMemory.begin(), end = obs->pageMemory.end();
|
|
while ( (it != end) && (memoryToFree > 0) )
|
|
{
|
|
int freeNumber = it.key();
|
|
if ( obs->observer->canUnloadPixmap( freeNumber ) )
|
|
{
|
|
// update mem stats
|
|
memoryToFree -= it.data();
|
|
obs->totalMemory -= it.data();
|
|
obs->pageMemory.remove( it );
|
|
// delete pixmap
|
|
pages_vector[ freeNumber ]->deletePixmap( observerId );
|
|
freed++;
|
|
}
|
|
++it;
|
|
}
|
|
}
|
|
//kdDebug() << "Id:" << observerId << " [" << obs->totalMemory << "kB] Removed " << freed << " pages. " << obs->pageMemory.count() << " pages kept in memory." << endl;
|
|
}
|
|
|
|
int KPDFDocument::mTotalMemory()
|
|
{
|
|
static int cachedValue = 0;
|
|
if ( cachedValue )
|
|
return cachedValue;
|
|
|
|
#ifdef __linux__
|
|
// if /proc/meminfo doesn't exist, return 128MB
|
|
QFile memFile( "/proc/meminfo" );
|
|
if ( !memFile.open( IO_ReadOnly ) )
|
|
return (cachedValue = 131072);
|
|
|
|
// read /proc/meminfo and sum up the contents of 'MemFree', 'Buffers'
|
|
// and 'Cached' fields. consider swapped memory as used memory.
|
|
QTextStream readStream( &memFile );
|
|
while ( !readStream.atEnd() )
|
|
{
|
|
QString entry = readStream.readLine();
|
|
if ( entry.startsWith( "MemTotal:" ) )
|
|
return (cachedValue = entry.section( ' ', -2, -2 ).toInt());
|
|
}
|
|
#endif
|
|
return (cachedValue = 131072);
|
|
}
|
|
|
|
int KPDFDocument::mFreeMemory()
|
|
{
|
|
#ifdef __linux__
|
|
// if /proc/meminfo doesn't exist, return MEMORY FULL
|
|
QFile memFile( "/proc/meminfo" );
|
|
if ( !memFile.open( IO_ReadOnly ) )
|
|
return 0;
|
|
|
|
// read /proc/meminfo and sum up the contents of 'MemFree', 'Buffers'
|
|
// and 'Cached' fields. consider swapped memory as used memory.
|
|
int memoryFree = 0;
|
|
QString entry;
|
|
QTextStream readStream( &memFile );
|
|
while ( !readStream.atEnd() )
|
|
{
|
|
entry = readStream.readLine();
|
|
if ( entry.startsWith( "MemFree:" ) ||
|
|
entry.startsWith( "Buffers:" ) ||
|
|
entry.startsWith( "Cached:" ) ||
|
|
entry.startsWith( "SwapFree:" ) )
|
|
memoryFree += entry.section( ' ', -2, -2 ).toInt();
|
|
if ( entry.startsWith( "SwapTotal:" ) )
|
|
memoryFree -= entry.section( ' ', -2, -2 ).toInt();
|
|
}
|
|
memFile.close();
|
|
return memoryFree;
|
|
#else
|
|
// tell the memory is full.. will act as in LOW profile
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
QString KPDFDocument::giveAbsolutePath( const QString & fileName )
|
|
{
|
|
if ( documentFileName.isEmpty() )
|
|
return QString::null;
|
|
|
|
// convert the pdf fileName to absolute using current pdf path
|
|
QFileInfo currentInfo( documentFileName );
|
|
return currentInfo.dir().absFilePath( fileName );
|
|
}
|
|
|
|
bool KPDFDocument::openRelativeFile( const QString & fileName )
|
|
{
|
|
QString absFileName = giveAbsolutePath( fileName );
|
|
if ( absFileName.isNull() )
|
|
return false;
|
|
|
|
kdDebug() << "openDocument: '" << absFileName << "'" << endl;
|
|
|
|
// open the absolute filename
|
|
return openDocument( absFileName );
|
|
}
|
|
|
|
void KPDFDocument::processPageList( bool documentChanged )
|
|
{
|
|
if ( d->filterText.length() < 3 )
|
|
unHilightPages();
|
|
else
|
|
{
|
|
uint pageCount = pages_vector.count();
|
|
for ( uint i = 0; i < pageCount ; i++ )
|
|
{
|
|
KPDFPage * page = pages_vector[ i ];
|
|
page->clearAttribute( KPDFPage::Highlight );
|
|
if ( d->filterText.length() > 2 )
|
|
{
|
|
if ( !page->hasSearchPage() )
|
|
requestTextPage( i );
|
|
if ( page->hasText( d->filterText, d->filterCase, true ) )
|
|
page->setAttribute( KPDFPage::Highlight );
|
|
}
|
|
}
|
|
}
|
|
|
|
// send the list to observers
|
|
foreachObserver( pageSetup( pages_vector, documentChanged ) );
|
|
}
|
|
|
|
void KPDFDocument::unHilightPages()
|
|
{
|
|
if ( d->filterText.isEmpty() )
|
|
return;
|
|
|
|
d->filterText = QString::null;
|
|
QValueVector<KPDFPage*>::iterator it = pages_vector.begin(), end = pages_vector.end();
|
|
for ( ; it != end; ++it )
|
|
{
|
|
KPDFPage * page = *it;
|
|
if ( page->attributes() & KPDFPage::Highlight )
|
|
{
|
|
page->clearAttribute( KPDFPage::Highlight );
|
|
foreachObserver( notifyPixmapChanged( page->number() ) );
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void KPDFDocument::slotCheckMemory()
|
|
{
|
|
// perform the memory check for 'free mem dependant' profiles only
|
|
if ( Settings::memoryLevel() == Settings::EnumMemoryLevel::Low )
|
|
return;
|
|
|
|
// for each observer going over 1MB of memory, invoke the manager
|
|
QMap< int, ObserverData * >::iterator it = d->observers.begin(), end = d->observers.end();
|
|
for ( ; it != end ; ++ it )
|
|
if ( (*it)->totalMemory > 1024 )
|
|
mCleanupMemory( it.key() /*observerId*/ );
|
|
}
|
|
|
|
void KPDFDocument::slotGeneratedContents( int id, int pageNumber )
|
|
{
|
|
// notify an observer that its pixmap changed
|
|
if ( d->observers.contains( id ) )
|
|
d->observers[ id ]->observer->notifyPixmapChanged( pageNumber );
|
|
}
|
|
|
|
#include "document.moc"
|