mirror of
https://invent.kde.org/graphics/okular
synced 2024-11-05 18:34:53 +00:00
b04a2daa6b
Summary:
Currently the coordinates of a link rectangle in a DjVu document are computed with respect to the size of the page the link is pointing to. Because of that, links only appear in correct places if the dimensions of a target page are the same as of the page containing the link.
The attached file demonstrating the issue contains two pages, one in portrait orientation and one in landscape, the first pointing to the second. The active zone for the link is different from where it is in other viewers.
{F6443987}
Reviewers: #okular
Subscribers: okular-devel
Tags: #okular
Differential Revision: https://phabricator.kde.org/D17194
436 lines
16 KiB
C++
436 lines
16 KiB
C++
/***************************************************************************
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* Copyright (C) 2006 by Pino Toscano <toscano.pino@tiscali.it> *
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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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#include "generator_djvu.h"
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#include <core/action.h>
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#include <core/annotations.h>
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#include <core/area.h>
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#include <core/document.h>
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#include <core/page.h>
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#include <core/textpage.h>
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#include <core/utils.h>
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#include <core/fileprinter.h>
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#include <QDomDocument>
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#include <QMutex>
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#include <QPixmap>
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#include <QString>
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#include <QUuid>
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#include <QPrinter>
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#include <KAboutData>
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#include <QDebug>
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#include <KLocalizedString>
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#include <QTemporaryFile>
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#include <QDir>
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static void recurseCreateTOC( QDomDocument &maindoc, const QDomNode &parent, QDomNode &parentDestination, KDjVu *djvu )
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{
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QDomNode n = parent.firstChild();
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while( !n.isNull() )
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{
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QDomElement el = n.toElement();
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QDomElement newel = maindoc.createElement( el.attribute( QStringLiteral("title") ) );
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parentDestination.appendChild( newel );
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QString dest;
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if ( !( dest = el.attribute( QStringLiteral("PageNumber") ) ).isEmpty() )
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{
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Okular::DocumentViewport vp;
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vp.pageNumber = dest.toInt() - 1;
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newel.setAttribute( QStringLiteral("Viewport"), vp.toString() );
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}
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else if ( !( dest = el.attribute( QStringLiteral("PageName") ) ).isEmpty() )
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{
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Okular::DocumentViewport vp;
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vp.pageNumber = djvu->pageNumber( dest );
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newel.setAttribute( QStringLiteral("Viewport"), vp.toString() );
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}
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else if ( !( dest = el.attribute( QStringLiteral("URL") ) ).isEmpty() )
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{
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newel.setAttribute( QStringLiteral("URL"), dest );
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}
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if ( el.hasChildNodes() )
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{
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recurseCreateTOC( maindoc, n, newel, djvu );
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}
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n = n.nextSibling();
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}
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}
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OKULAR_EXPORT_PLUGIN(DjVuGenerator, "libokularGenerator_djvu.json")
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DjVuGenerator::DjVuGenerator( QObject *parent, const QVariantList &args )
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: Okular::Generator( parent, args ), m_docSyn( nullptr )
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{
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setFeature( TextExtraction );
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setFeature( Threaded );
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setFeature( PrintPostscript );
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if ( Okular::FilePrinter::ps2pdfAvailable() )
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setFeature( PrintToFile );
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m_djvu = new KDjVu();
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m_djvu->setCacheEnabled( false );
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}
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DjVuGenerator::~DjVuGenerator()
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{
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delete m_djvu;
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}
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bool DjVuGenerator::loadDocument( const QString & fileName, QVector< Okular::Page * > & pagesVector )
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{
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QMutexLocker locker( userMutex() );
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if ( !m_djvu->openFile( fileName ) )
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return false;
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locker.unlock();
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loadPages( pagesVector, 0 );
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return true;
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}
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bool DjVuGenerator::doCloseDocument()
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{
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userMutex()->lock();
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m_djvu->closeFile();
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userMutex()->unlock();
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delete m_docSyn;
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m_docSyn = nullptr;
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return true;
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}
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QImage DjVuGenerator::image( Okular::PixmapRequest *request )
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{
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userMutex()->lock();
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QImage img = m_djvu->image( request->pageNumber(), request->width(), request->height(), request->page()->rotation() );
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userMutex()->unlock();
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return img;
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}
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Okular::DocumentInfo DjVuGenerator::generateDocumentInfo( const QSet<Okular::DocumentInfo::Key> &keys ) const
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{
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Okular::DocumentInfo docInfo;
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if ( keys.contains( Okular::DocumentInfo::MimeType ) )
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docInfo.set( Okular::DocumentInfo::MimeType, QStringLiteral("image/vnd.djvu") );
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if ( m_djvu )
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{
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// compile internal structure reading properties from KDjVu
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if ( keys.contains( Okular::DocumentInfo::Author ) )
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docInfo.set( Okular::DocumentInfo::Title, m_djvu->metaData( QStringLiteral("title") ).toString() );
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if ( keys.contains( Okular::DocumentInfo::Author ) )
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docInfo.set( Okular::DocumentInfo::Author, m_djvu->metaData( QStringLiteral("author") ).toString() );
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if ( keys.contains( Okular::DocumentInfo::CreationDate ) )
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docInfo.set( Okular::DocumentInfo::CreationDate, m_djvu->metaData( QStringLiteral("year") ).toString() );
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if ( keys.contains( Okular::DocumentInfo::CustomKeys ) )
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{
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docInfo.set( QStringLiteral("editor"), m_djvu->metaData( QStringLiteral("editor") ).toString(), i18n( "Editor" ) );
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docInfo.set( QStringLiteral("publisher"), m_djvu->metaData( QStringLiteral("publisher") ).toString(), i18n( "Publisher" ) );
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docInfo.set( QStringLiteral("volume"), m_djvu->metaData( QStringLiteral("volume") ).toString(), i18n( "Volume" ) );
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docInfo.set( QStringLiteral("documentType"), m_djvu->metaData( QStringLiteral("documentType") ).toString(), i18n( "Type of document" ) );
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QVariant numcomponents = m_djvu->metaData( QStringLiteral("componentFile") );
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docInfo.set( QStringLiteral("componentFile"), numcomponents.type() != QVariant::Int ? i18nc( "Unknown number of component files", "Unknown" ) : numcomponents.toString(), i18n( "Component Files" ) );
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}
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}
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return docInfo;
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}
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const Okular::DocumentSynopsis * DjVuGenerator::generateDocumentSynopsis()
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{
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QMutexLocker locker( userMutex() );
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if ( m_docSyn )
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return m_docSyn;
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const QDomDocument *doc = m_djvu->documentBookmarks();
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if ( doc )
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{
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m_docSyn = new Okular::DocumentSynopsis();
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recurseCreateTOC( *m_docSyn, *doc, *m_docSyn, m_djvu );
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}
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locker.unlock();
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return m_docSyn;
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}
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bool DjVuGenerator::print( QPrinter& printer )
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{
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bool result = false;
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// Create tempfile to write to
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QTemporaryFile tf(QDir::tempPath() + QLatin1String("/okular_XXXXXX.ps"));
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if ( !tf.open() )
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return false;
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const QString fileName = tf.fileName();
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QMutexLocker locker( userMutex() );
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QList<int> pageList = Okular::FilePrinter::pageList( printer, m_djvu->pages().count(),
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document()->currentPage() + 1,
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document()->bookmarkedPageList() );
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if ( m_djvu->exportAsPostScript( &tf, pageList ) )
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{
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tf.setAutoRemove( false );
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tf.close();
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int ret = Okular::FilePrinter::printFile( printer, fileName, document()->orientation(),
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Okular::FilePrinter::SystemDeletesFiles,
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Okular::FilePrinter::ApplicationSelectsPages,
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document()->bookmarkedPageRange() );
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result = ( ret >=0 );
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}
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return result;
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}
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QVariant DjVuGenerator::metaData( const QString &key, const QVariant &option ) const
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{
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Q_UNUSED( option )
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if ( key == QLatin1String("DocumentTitle") )
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{
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return m_djvu->metaData( QStringLiteral("title") );
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}
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return QVariant();
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}
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Okular::TextPage* DjVuGenerator::textPage( Okular::TextRequest *request )
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{
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userMutex()->lock();
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const Okular::Page *page = request->page();
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QList<KDjVu::TextEntity> te;
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#if 0
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m_djvu->textEntities( page->number(), "char" );
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#endif
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if ( te.isEmpty() )
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te = m_djvu->textEntities( page->number(), QStringLiteral("word") );
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if ( te.isEmpty() )
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te = m_djvu->textEntities( page->number(), QStringLiteral("line") );
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userMutex()->unlock();
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QList<KDjVu::TextEntity>::ConstIterator it = te.constBegin();
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QList<KDjVu::TextEntity>::ConstIterator itEnd = te.constEnd();
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QList<Okular::TextEntity*> words;
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const KDjVu::Page* djvupage = m_djvu->pages().at( page->number() );
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for ( ; it != itEnd; ++it )
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{
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const KDjVu::TextEntity& cur = *it;
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words.append( new Okular::TextEntity( cur.text(), new Okular::NormalizedRect( cur.rect(), djvupage->width(), djvupage->height() ) ) );
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}
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Okular::TextPage *textpage = new Okular::TextPage( words );
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return textpage;
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}
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void DjVuGenerator::loadPages( QVector<Okular::Page*> & pagesVector, int rotation )
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{
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const QVector<KDjVu::Page*> &djvu_pages = m_djvu->pages();
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int numofpages = djvu_pages.count();
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pagesVector.resize( numofpages );
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for ( int i = 0; i < numofpages; ++i )
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{
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const KDjVu::Page *p = djvu_pages.at( i );
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if (pagesVector[i])
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delete pagesVector[i];
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int w = p->width();
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int h = p->height();
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if ( rotation % 2 == 1 )
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qSwap( w, h );
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Okular::Page *page = new Okular::Page( i, w, h, (Okular::Rotation)( p->orientation() + rotation ) );
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pagesVector[i] = page;
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QList<KDjVu::Annotation*> annots;
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QList<KDjVu::Link*> links;
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userMutex()->lock();
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m_djvu->linksAndAnnotationsForPage( i, &links, &annots );
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userMutex()->unlock();
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if ( !links.isEmpty() )
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{
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QLinkedList<Okular::ObjectRect *> rects;
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QList<KDjVu::Link*>::ConstIterator it = links.constBegin();
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QList<KDjVu::Link*>::ConstIterator itEnd = links.constEnd();
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for ( ; it != itEnd; ++it )
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{
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KDjVu::Link *curlink = (*it);
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Okular::ObjectRect *newrect = convertKDjVuLink( i, curlink );
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if ( newrect )
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rects.append( newrect );
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// delete the links as soon as we process them
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delete curlink;
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}
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if ( rects.count() > 0 )
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page->setObjectRects( rects );
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}
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if ( !annots.isEmpty() )
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{
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QList<KDjVu::Annotation*>::ConstIterator it = annots.constBegin();
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QList<KDjVu::Annotation*>::ConstIterator itEnd = annots.constEnd();
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for ( ; it != itEnd; ++it )
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{
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KDjVu::Annotation *ann = (*it);
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Okular::Annotation *newann = convertKDjVuAnnotation( w, h, ann );
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if ( newann )
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page->addAnnotation( newann );
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// delete the annotations as soon as we process them
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delete ann;
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}
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}
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}
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}
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Okular::ObjectRect* DjVuGenerator::convertKDjVuLink( int page, KDjVu::Link * link ) const
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{
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Okular::Action *newlink = nullptr;
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Okular::ObjectRect *newrect = nullptr;
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switch ( link->type() )
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{
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case KDjVu::Link::PageLink:
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{
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KDjVu::PageLink* l = static_cast<KDjVu::PageLink*>( link );
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bool ok = true;
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QString target = l->page();
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if ( ( target.length() > 0 ) && target.at(0) == QLatin1Char( '#' ) )
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target.remove( 0, 1 );
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int tmppage = target.toInt( &ok );
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if ( ok || target.isEmpty() )
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{
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Okular::DocumentViewport vp;
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if ( !target.isEmpty() )
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vp.pageNumber = ( target.at(0) == QLatin1Char( '+' ) || target.at(0) == QLatin1Char( '-' ) ) ? page + tmppage : tmppage - 1;
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newlink = new Okular::GotoAction( QString(), vp );
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}
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break;
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}
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case KDjVu::Link::UrlLink:
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{
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KDjVu::UrlLink* l = static_cast<KDjVu::UrlLink*>( link );
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QString url = l->url();
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newlink = new Okular::BrowseAction( QUrl(url) );
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break;
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}
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}
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if ( newlink )
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{
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const KDjVu::Page* p = m_djvu->pages().at( page );
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int width = p->width();
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int height = p->height();
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bool scape_orientation = false; // hack by tokoe, should always create default page
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if ( scape_orientation )
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qSwap( width, height );
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switch ( link->areaType() )
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{
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case KDjVu::Link::RectArea:
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case KDjVu::Link::EllipseArea:
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{
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QRect r( QPoint( link->point().x(), p->height() - link->point().y() - link->size().height() ), link->size() );
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bool ellipse = ( link->areaType() == KDjVu::Link::EllipseArea );
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newrect = new Okular::ObjectRect( Okular::NormalizedRect( Okular::Utils::rotateRect( r, width, height, 0 ), width, height ), ellipse, Okular::ObjectRect::Action, newlink );
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break;
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}
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case KDjVu::Link::PolygonArea:
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{
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QPolygon poly = link->polygon();
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QPolygonF newpoly;
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for ( int i = 0; i < poly.count(); ++i )
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{
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int x = poly.at(i).x();
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int y = poly.at(i).y();
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if ( scape_orientation )
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qSwap( x, y );
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else
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{
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y = height - y;
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}
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newpoly << QPointF( (double)(x)/width, (double)(y)/height );
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}
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if ( !newpoly.isEmpty() )
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{
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newpoly << newpoly.first();
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newrect = new Okular::ObjectRect( newpoly, Okular::ObjectRect::Action, newlink );
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}
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break;
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}
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default: ;
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}
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if ( !newrect )
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{
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delete newlink;
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}
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}
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return newrect;
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}
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Okular::Annotation* DjVuGenerator::convertKDjVuAnnotation( int w, int h, KDjVu::Annotation * ann ) const
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{
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Okular::Annotation *newann = nullptr;
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switch ( ann->type() )
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{
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case KDjVu::Annotation::TextAnnotation:
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{
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KDjVu::TextAnnotation* txtann = static_cast<KDjVu::TextAnnotation*>( ann );
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Okular::TextAnnotation * newtxtann = new Okular::TextAnnotation();
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// boundary
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QRect rect( QPoint( txtann->point().x(), h - txtann->point().y() - txtann->size().height() ), txtann->size() );
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newtxtann->setBoundingRectangle( Okular::NormalizedRect( Okular::Utils::rotateRect( rect, w, h, 0 ), w, h ) );
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// type
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newtxtann->setTextType( txtann->inlineText() ? Okular::TextAnnotation::InPlace : Okular::TextAnnotation::Linked );
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newtxtann->style().setOpacity( txtann->color().alphaF() );
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// FIXME remove once the annotation text handling is fixed
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newtxtann->setContents( ann->comment() );
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newann = newtxtann;
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break;
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}
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case KDjVu::Annotation::LineAnnotation:
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{
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KDjVu::LineAnnotation* lineann = static_cast<KDjVu::LineAnnotation*>( ann );
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Okular::LineAnnotation * newlineann = new Okular::LineAnnotation();
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// boundary
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QPoint a( lineann->point().x(), h - lineann->point().y() );
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QPoint b( lineann->point2().x(), h - lineann->point2().y() );
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QRect rect = QRect( a, b ).normalized();
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newlineann->setBoundingRectangle( Okular::NormalizedRect( Okular::Utils::rotateRect( rect, w, h, 0 ), w, h ) );
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// line points
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QLinkedList<Okular::NormalizedPoint> points;
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points.append( Okular::NormalizedPoint( a.x(), a.y(), w, h ) );
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points.append( Okular::NormalizedPoint( b.x(), b.y(), w, h ) );
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newlineann->setLinePoints( points );
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// arrow?
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if ( lineann->isArrow() )
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newlineann->setLineEndStyle( Okular::LineAnnotation::OpenArrow );
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// width
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newlineann->style().setWidth( lineann->width() );
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newann = newlineann;
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break;
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}
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}
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if ( newann )
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{
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// setting the common parameters
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newann->style().setColor( ann->color() );
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newann->setContents( ann->comment() );
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// creating an id as name for the annotation
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QString uid = QUuid::createUuid().toString();
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uid.remove( 0, 1 );
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uid.chop( 1 );
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uid.remove( QLatin1Char( '-' ) );
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newann->setUniqueName( uid );
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// is external
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newann->setFlags( newann->flags() | Okular::Annotation::External );
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}
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return newann;
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}
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#include "generator_djvu.moc"
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