File indexing completed on 2024-04-28 15:40:13

 // SPDX-FileCopyrightText: 2012 Jesper K. Pedersen <jesper.pedersen@kdab.com>
 // SPDX-FileCopyrightText: 2013-2023 Johannes Zarl-Zierl <johannes@zarl-zierl.at>
 // SPDX-FileCopyrightText: 2020 Tobias Leupold <tl@stonemx.de>
 //
 // SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
 
 #include "UpdateVideoThumbnail.h"
 
 #include "Logging.h"
 #include "Window.h"
 
 #include <BackgroundJobs/HandleVideoThumbnailRequestJob.h>
 #include <ThumbnailView/CellGeometry.h>
 #include <Utilities/FileUtil.h>
 #include <kpabase/FileExtensions.h>
 #include <kpathumbnails/ThumbnailCache.h>
 
 #include <QLoggingCategory>
 
 namespace
 {
 
 DB::FileName nextExistingImage(const DB::FileName &fileName, int frame, int direction)
 {
     // starting with i=1 is *not* an off-by-one error
     for (int i = 1; i < 10; ++i) {
         const int nextIndex = (frame + 10 + direction * i) % 10;
         const DB::FileName file = BackgroundJobs::HandleVideoThumbnailRequestJob::frameName(fileName, nextIndex);
         if (file.exists()) {
             qCDebug(MainWindowLog) << "Next frame for video" << file.relative() << " has index" << nextIndex;
             return file;
         }
     }
     const DB::FileName file = BackgroundJobs::HandleVideoThumbnailRequestJob::frameName(fileName, 0);
     qCDebug(MainWindowLog) << "No next thumbnail found for video" << fileName.relative()
                            << "(frame:" << frame << ", direction:" << direction << ") - thumbnail base name:" << file.absolute();
     // the thumbnail may not have been written to disk yet
     return DB::FileName();
 }
 
 void update(const DB::FileName &fileName, int direction)
 {
     const DB::FileName baseImageName = BackgroundJobs::HandleVideoThumbnailRequestJob::pathForRequest(fileName);
     QImage baseImage(baseImageName.absolute());
 
     int frame = 0;
     for (; frame < 10; ++frame) {
         const DB::FileName frameFile = BackgroundJobs::HandleVideoThumbnailRequestJob::frameName(fileName, frame);
         QImage frameImage(frameFile.absolute());
         if (frameImage.isNull())
             continue;
         if (baseImage == frameImage) {
             break;
         }
     }
 
     const DB::FileName newImageName = nextExistingImage(fileName, frame, direction);
     if (newImageName.isNull())
         return;
 
     Utilities::copyOrOverwrite(newImageName.absolute(), baseImageName.absolute());
 
     QImage image = QImage(newImageName.absolute()).scaled(ThumbnailView::CellGeometry::preferredIconSize(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
     MainWindow::Window::theMainWindow()->thumbnailCache()->insert(fileName, image);
     MainWindow::Window::theMainWindow()->reloadThumbnails();
 }
 
 void update(const DB::FileNameList &list, int direction)
 {
     for (const DB::FileName &fileName : list) {
         if (KPABase::isVideo(fileName))
             update(fileName, direction);
     }
 }
 } // namespace
 
 void MainWindow::UpdateVideoThumbnail::useNext(const DB::FileNameList &list)
 {
     update(list, +1);
 }
 
 void MainWindow::UpdateVideoThumbnail::usePrevious(const DB::FileNameList &list)
 {
     update(list, -1);
 }
 
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