mirror of
https://invent.kde.org/graphics/okular
synced 2024-07-17 02:37:04 +00:00
335 lines
8.8 KiB
C++
335 lines
8.8 KiB
C++
/***************************************************************************
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* Copyright (C) 2007 by Pino Toscano <pino@kde.org> *
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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 "tocmodel.h"
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#include <qapplication.h>
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#include <qdom.h>
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#include <qlist.h>
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#include <kicon.h>
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#include "pageitemdelegate.h"
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#include "core/document.h"
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#include "core/page.h"
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Q_DECLARE_METATYPE( QModelIndex )
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struct TOCItem
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{
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TOCItem();
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TOCItem( TOCItem *parent, const QDomElement &e );
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~TOCItem();
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QString text;
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Okular::DocumentViewport viewport;
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QString extFileName;
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bool highlight : 1;
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TOCItem *parent;
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QList< TOCItem* > children;
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TOCModelPrivate *model;
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};
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class TOCModelPrivate
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{
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public:
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TOCModelPrivate( TOCModel *qq );
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~TOCModelPrivate();
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void addChildren( const QDomNode &parentNode, TOCItem * parentItem );
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QModelIndex indexForItem( TOCItem *item ) const;
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void findViewport( const Okular::DocumentViewport &viewport, TOCItem *item, QList< TOCItem* > &list ) const;
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TOCModel *q;
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TOCItem *root;
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bool dirty : 1;
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Okular::Document *document;
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QList< TOCItem* > itemsToOpen;
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QList< TOCItem* > currentPage;
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};
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TOCItem::TOCItem()
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: highlight( false ), parent( 0 ), model( 0 )
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{
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}
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TOCItem::TOCItem( TOCItem *_parent, const QDomElement &e )
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: highlight( false ), parent( _parent )
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{
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parent->children.append( this );
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model = parent->model;
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text = e.tagName();
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// viewport loading
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if ( e.hasAttribute( "Viewport" ) )
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{
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// if the node has a viewport, set it
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viewport = Okular::DocumentViewport( e.attribute( "Viewport" ) );
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}
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else if ( e.hasAttribute( "ViewportName" ) )
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{
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// if the node references a viewport, get the reference and set it
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const QString & page = e.attribute( "ViewportName" );
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QString viewport_string = model->document->metaData( "NamedViewport", page ).toString();
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if ( !viewport_string.isEmpty() )
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viewport = Okular::DocumentViewport( viewport_string );
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}
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extFileName = e.attribute( "ExternalFileName" );
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}
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TOCItem::~TOCItem()
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{
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qDeleteAll( children );
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}
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TOCModelPrivate::TOCModelPrivate( TOCModel *qq )
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: q( qq ), root( new TOCItem ), dirty( false )
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{
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root->model = this;
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}
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TOCModelPrivate::~TOCModelPrivate()
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{
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delete root;
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}
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void TOCModelPrivate::addChildren( const QDomNode & parentNode, TOCItem * parentItem )
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{
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TOCItem * currentItem = 0;
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QDomNode n = parentNode.firstChild();
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while( !n.isNull() )
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{
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// convert the node to an element (sure it is)
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QDomElement e = n.toElement();
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// insert the entry as top level (listview parented) or 2nd+ level
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currentItem = new TOCItem( parentItem, e );
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// descend recursively and advance to the next node
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if ( e.hasChildNodes() )
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addChildren( n, currentItem );
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// open/keep close the item
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bool isOpen = false;
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if ( e.hasAttribute( "Open" ) )
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isOpen = QVariant( e.attribute( "Open" ) ).toBool();
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if ( !isOpen )
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itemsToOpen.append( currentItem );
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n = n.nextSibling();
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}
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}
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QModelIndex TOCModelPrivate::indexForItem( TOCItem *item ) const
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{
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if ( item->parent )
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{
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int id = item->parent->children.indexOf( item );
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if ( id >= 0 && id < item->parent->children.count() )
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return q->createIndex( id, 0, item );
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}
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return QModelIndex();
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}
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void TOCModelPrivate::findViewport( const Okular::DocumentViewport &viewport, TOCItem *item, QList< TOCItem* > &list ) const
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{
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if ( item->viewport.isValid() && item->viewport.pageNumber == viewport.pageNumber )
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list.append( item );
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foreach ( TOCItem *child, item->children )
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findViewport( viewport, child, list );
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}
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TOCModel::TOCModel( Okular::Document *document, QObject *parent )
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: QAbstractItemModel( parent ), d( new TOCModelPrivate( this ) )
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{
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d->document = document;
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qRegisterMetaType< QModelIndex >();
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}
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TOCModel::~TOCModel()
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{
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delete d;
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}
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int TOCModel::columnCount( const QModelIndex &parent ) const
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{
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Q_UNUSED( parent )
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return 1;
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}
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QVariant TOCModel::data( const QModelIndex &index, int role ) const
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{
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if ( !index.isValid() )
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return QVariant();
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TOCItem *item = static_cast< TOCItem* >( index.internalPointer() );
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switch ( role )
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{
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case Qt::DisplayRole:
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return item->text;
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break;
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case Qt::DecorationRole:
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if ( item->highlight )
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return KIcon( QApplication::layoutDirection() == Qt::RightToLeft ? "arrow-left" : "arrow-right" );
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break;
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case PageItemDelegate::PageRole:
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if ( item->viewport.isValid() )
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return item->viewport.pageNumber + 1;
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break;
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case PageItemDelegate::PageLabelRole:
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if ( item->viewport.isValid() )
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return d->document->page( item->viewport.pageNumber )->label();
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break;
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}
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return QVariant();
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}
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bool TOCModel::hasChildren( const QModelIndex &parent ) const
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{
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if ( !parent.isValid() )
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return true;
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TOCItem *item = static_cast< TOCItem* >( parent.internalPointer() );
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return !item->children.isEmpty();
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}
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QVariant TOCModel::headerData( int section, Qt::Orientation orientation, int role ) const
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{
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if ( orientation != Qt::Horizontal )
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return QVariant();
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if ( section == 0 && role == Qt::DisplayRole )
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return "Topics";
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return QVariant();
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}
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QModelIndex TOCModel::index( int row, int column, const QModelIndex &parent ) const
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{
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if ( row < 0 || column != 0 )
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return QModelIndex();
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TOCItem *item = parent.isValid() ? static_cast< TOCItem* >( parent.internalPointer() ) : d->root;
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if ( row < item->children.count() )
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return createIndex( row, column, item->children.at( row ) );
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return QModelIndex();
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}
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QModelIndex TOCModel::parent( const QModelIndex &index ) const
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{
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if ( !index.isValid() )
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return QModelIndex();
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TOCItem *item = static_cast< TOCItem* >( index.internalPointer() );
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return d->indexForItem( item->parent );
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}
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int TOCModel::rowCount( const QModelIndex &parent ) const
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{
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TOCItem *item = parent.isValid() ? static_cast< TOCItem* >( parent.internalPointer() ) : d->root;
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return item->children.count();
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}
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void TOCModel::fill( const Okular::DocumentSynopsis *toc )
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{
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if ( !toc )
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return;
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clear();
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emit layoutAboutToBeChanged();
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d->addChildren( *toc, d->root );
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d->dirty = true;
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emit layoutChanged();
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foreach ( TOCItem *item, d->itemsToOpen )
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{
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QModelIndex index = d->indexForItem( item );
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if ( !index.isValid() )
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continue;
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QMetaObject::invokeMethod( QObject::parent(), "expand", Qt::QueuedConnection, Q_ARG( QModelIndex, index ) );
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}
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d->itemsToOpen.clear();
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}
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void TOCModel::clear()
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{
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if ( !d->dirty )
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return;
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qDeleteAll( d->root->children );
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d->root->children.clear();
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d->currentPage.clear();
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reset();
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d->dirty = false;
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}
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void TOCModel::setCurrentViewport( const Okular::DocumentViewport &viewport )
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{
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foreach ( TOCItem* item, d->currentPage )
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{
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QModelIndex index = d->indexForItem( item );
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if ( !index.isValid() )
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continue;
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item->highlight = false;
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emit dataChanged( index, index );
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}
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d->currentPage.clear();
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QList< TOCItem* > newCurrentPage;
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d->findViewport( viewport, d->root, newCurrentPage );
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// HACK: for now, support only the first item found
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if ( newCurrentPage.count() > 0 )
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{
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TOCItem *first = newCurrentPage.first();
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newCurrentPage.clear();
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newCurrentPage.append( first );
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}
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d->currentPage = newCurrentPage;
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foreach ( TOCItem* item, d->currentPage )
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{
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QModelIndex index = d->indexForItem( item );
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if ( !index.isValid() )
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continue;
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item->highlight = true;
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emit dataChanged( index, index );
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}
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}
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QString TOCModel::externalFileNameForIndex( const QModelIndex &index ) const
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{
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if ( !index.isValid() )
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return QString();
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TOCItem *item = static_cast< TOCItem* >( index.internalPointer() );
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return item->extFileName;
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}
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Okular::DocumentViewport TOCModel::viewportForIndex( const QModelIndex &index ) const
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{
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if ( !index.isValid() )
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return Okular::DocumentViewport();
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TOCItem *item = static_cast< TOCItem* >( index.internalPointer() );
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return item->viewport;
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}
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#include "tocmodel.moc"
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