File indexing completed on 2024-05-12 04:19:37

 /*
 Gwenview: an image viewer
 Copyright 2007 Aurélien Gâteau <agateau@kde.org>
 
 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 */
 #ifndef DOCUMENTFACTORY_H
 #define DOCUMENTFACTORY_H
 
 // Qt
 #include <QObject>
 
 #include <lib/document/document.h>
 
 class QUndoGroup;
 
 class QUrl;
 
 namespace Gwenview
 {
 struct DocumentFactoryPrivate;
 
 /**
  * This class holds all instances of Document.
  *
  * It keeps a cache of recently accessed documents to avoid reloading them.
  * To do so it keeps a last-access timestamp, which is updated to the
  * current time every time DocumentFactory::load() is called.
  */
 class GWENVIEWLIB_EXPORT DocumentFactory : public QObject
 {
     Q_OBJECT
 public:
     static DocumentFactory *instance();
     ~DocumentFactory() override;
 
     /**
      * Loads the document associated with url, or returns an already cached
      * instance of Document::Ptr if there is any.
      * This method updates the last-access timestamp.
      */
     Document::Ptr load(const QUrl &url);
 
     /**
      * Returns a document if it has already been loaded once with load().
      * This method does not update the last-access timestamp.
      */
     Document::Ptr getCachedDocument(const QUrl &) const;
 
     QList<QUrl> modifiedDocumentList() const;
 
     bool hasUrl(const QUrl &) const;
 
     void clearCache();
 
     QUndoGroup *undoGroup();
 
     /**
      * Do not keep document whose url is @url in cache even if it has been
      * modified
      */
     void forget(const QUrl &url);
 
 Q_SIGNALS:
     void modifiedDocumentListChanged();
     void documentChanged(const QUrl &);
     void documentBusyStateChanged(const QUrl &, bool);
     void readyForDirListerStart(const QUrl &url);
 
 private Q_SLOTS:
     void slotLoaded(const QUrl &);
     void slotSaved(const QUrl &, const QUrl &);
     void slotModified(const QUrl &);
     void slotBusyChanged(const QUrl &, bool);
 
 private:
     DocumentFactory();
 
     DocumentFactoryPrivate *const d;
 };
 
 } // namespace
 #endif /* DOCUMENTFACTORY_H */