File indexing completed on 2024-05-05 17:04:27

 /* This file is part of the KDE project
  * Copyright (C) 2012 Boudewijn Rempt <boud@valdyas.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.
  */
 
 #include "RecentImageImageProvider.h"
 #include <QFile>
 #include <QDir>
 #include <QProcess>
 #include <QApplication>
 #include <QImage>
 #include <QImageReader>
 #include <QPainter>
 
 #include <KoStore.h>
 #include <KoDocument.h>
 #include <KoPart.h>
 
 RecentImageImageProvider::RecentImageImageProvider()
     : QQuickImageProvider(QQuickImageProvider::Image)
 {
 }
 
 QImage RecentImageImageProvider::requestImage(const QString &id, QSize *size, const QSize &requestedSize)
 {
     int width = 512;
     int height = 512;
     if(id.endsWith(QLatin1String("odt"), Qt::CaseInsensitive) ||
        id.endsWith(QLatin1String("doc"), Qt::CaseInsensitive) ||
        id.endsWith(QLatin1String("docx"), Qt::CaseInsensitive)) {
         width *= 0.72413793;
     } else {
         height *= 0.72413793;
     }
 
     if (size) {
         *size = QSize(width, height);
     }
 
     QSize sz(requestedSize.width() > 0 ? requestedSize.width() : width,
              requestedSize.height() > 0 ? requestedSize.height() : height);
 
     QFile f(id);
     QImage thumbnail(sz, QImage::Format_ARGB32_Premultiplied);
     thumbnail.fill(Qt::white);
 
     if (f.exists()) {
         // try to use any embedded thumbnail
         KoStore *store = KoStore::createStore(id, KoStore::Read);
 
         bool thumbnailFound = false;
         if (store &&
             // ODF thumbnail?
             (store->open(QLatin1String("Thumbnails/thumbnail.png")) ||
             // old KOffice/Calligra thumbnail?
             store->open(QLatin1String("preview.png")) ||
             // OOXML?
             store->open(QLatin1String("docProps/thumbnail.jpeg")))) {
             // Hooray! No long delay for the user...
             const QByteArray thumbnailData = store->read(store->size());
 
             QImage thumbnailImage;
             if (thumbnailImage.loadFromData(thumbnailData) ){//&&
                 //thumbnailImage.width() >= width && thumbnailImage.height() >= height) {
                 // put a white background behind the thumbnail
                 // as lots of old(?) OOo files have thumbnails with transparent background
                 thumbnail = QImage(thumbnailImage.size(), QImage::Format_RGB32);
                 thumbnail.fill(QColor(Qt::white).rgb());
                 QPainter p(&thumbnail);
                 p.drawImage(QPoint(0, 0), thumbnailImage);
                 p.end();
                 thumbnail = thumbnail.scaled(sz, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                 delete store;
                 thumbnailFound = true;
             }
         }
 
          if(!thumbnailFound) {
             // load document and render the thumbnail ourselves
             QProcess thumbnailer;
             QString thumbnailerProgram = QString("%1%2calligrageminithumbnailhelper").arg(qApp->applicationDirPath()).arg(QDir::separator());
             QStringList arguments;
             arguments << "--in" << id;
             QString thumbFile = id;
             thumbFile.replace("/", "-").replace("\\", "-");
             thumbFile.prepend(QDir::separator()).prepend(QDir::tempPath());
             thumbFile.append(".png");
             arguments << "--out" << thumbFile;
             arguments << "--width" << QString::number(sz.width());
             arguments << "--height" << QString::number(sz.height());
             bool fileExists = QFile::exists(thumbFile);
             if(!fileExists)
                 thumbnailer.start(thumbnailerProgram, arguments);
             if(fileExists || thumbnailer.waitForFinished(3000)) {
                 thumbnail.load(thumbFile);
                 thumbnail = thumbnail.scaled(sz, Qt::KeepAspectRatio, Qt::SmoothTransformation);
             }
             else {
                 // some error, final failure...
                 qDebug() << "Failed completely to find a preview for" << id;
             }
         }
     }
     return thumbnail;
 }