File indexing completed on 2025-01-05 03:59:46

 /* ============================================================
  *
  * This file is a part of digiKam project
  * https://www.digikam.org
  *
  * Date        : 2011-08-03
  * Description : digital camera thumbnails controller
  *
  * SPDX-FileCopyrightText: 2011-2024 by Gilles Caulier <caulier dot gilles at gmail dot com>
  * SPDX-FileCopyrightText: 2015      by Mohamed_Anwer <m_dot_anwer at gmx dot com>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  *
  * ============================================================ */
 
 #include "camerathumbsctrl.h"
 
 // Qt includes
 
 #include <QCache>
 #include <QPair>
 
 // Local includes
 
 #include "digikam_debug.h"
 #include "cameracontroller.h"
 #include "thumbnailsize.h"
 #include "iccsettings.h"
 #include "iccmanager.h"
 #include "iccprofile.h"
 
 namespace Digikam
 {
 
 class Q_DECL_HIDDEN CameraThumbsCtrlStaticPriv
 {
 public:
 
     CameraThumbsCtrlStaticPriv()
       : profile(IccProfile::sRGB())
     {
     }
 
 public:
 
     IccProfile profile;
 };
 
 Q_GLOBAL_STATIC(CameraThumbsCtrlStaticPriv, static_d)
 
 // ------------------------------------------------------------------------------------------
 
 class Q_DECL_HIDDEN CameraThumbsCtrl::Private
 {
 
 public:
 
     explicit Private()
         : controller(nullptr)
     {
     }
 
     QCache<QUrl, CachedItem>   cache;  // Camera info/thumb cache based on item url keys.
 
     QMap<QUrl, CameraCommand*> pendingItems;
 
     CameraController*          controller;
 };
 
 // --------------------------------------------------------
 
 CameraThumbsCtrl::CameraThumbsCtrl(CameraController* const ctrl, QWidget* const parent)
     : QObject(parent),
       d      (new Private)
 {
     d->controller     = ctrl;
     static_d->profile = IccManager::displayProfile(parent);
 
     connect(d->controller, SIGNAL(signalThumbInfo(QString,QString,CamItemInfo,QImage)),
             this, SLOT(slotThumbInfo(QString,QString,CamItemInfo,QImage)));
 
     connect(d->controller, SIGNAL(signalThumbInfoFailed(QString,QString,CamItemInfo)),
             this, SLOT(slotThumbInfoFailed(QString,QString,CamItemInfo)));
 
     setCacheSize(200);
 }
 
 CameraThumbsCtrl::~CameraThumbsCtrl()
 {
     clearCache();
 }
 
 CameraController* CameraThumbsCtrl::cameraController() const
 {
     return d->controller;
 }
 
 bool CameraThumbsCtrl::getThumbInfo(const CamItemInfo& info, CachedItem& item) const
 {
     if      (hasItemFromCache(info.url()))
     {
         // We look if items are not in cache.
 
         item = *retrieveItemFromCache(info.url());
 
         return true;
     }
     else if (d->pendingItems.contains(info.url()))
     {
         d->controller->moveThumbsInfo(d->pendingItems.value(info.url()));
     }
     else
     {
         // We look if items are not in pending list.
 
         CameraCommand* const cmd = d->controller->getThumbsInfo(CamItemInfoList() << info,
                                                                 ThumbnailSize::maxThumbsSize());
         d->pendingItems.insert(info.url(), cmd);
     }
 
     item = CachedItem(info, d->controller->mimeTypeThumbnail(info.name).pixmap(ThumbnailSize::maxThumbsSize()));
 
     return false;
 }
 
 void CameraThumbsCtrl::updateThumbInfoFromCache(const CamItemInfo& info)
 {
     removeItemFromCache(info.url());
     CachedItem item;
     getThumbInfo(info, item);
 }
 
 void CameraThumbsCtrl::slotThumbInfo(const QString&, const QString& file, const CamItemInfo& info, const QImage& thumb)
 {
     QImage thumbnail = thumb;
 
     if (thumb.isNull())
     {
         thumbnail = d->controller->mimeTypeThumbnail(file).pixmap(ThumbnailSize::maxThumbsSize()).toImage();
     }
 
     // Color Managed view rules.
 
     if (IccSettings::instance()->useManagedPreviews())
     {
         IccManager::transformForDisplay(thumbnail, static_d->profile);
     }
 
     putItemToCache(info.url(), info, QPixmap::fromImage(thumbnail));
     d->pendingItems.remove(info.url());
     Q_EMIT signalThumbInfoReady(info);
 }
 
 void CameraThumbsCtrl::slotThumbInfoFailed(const QString& /*folder*/, const QString& file, const CamItemInfo& info)
 {
     QPixmap pix = d->controller->mimeTypeThumbnail(file).pixmap(ThumbnailSize::maxThumbsSize());
     putItemToCache(info.url(), info, pix);
     d->pendingItems.remove(info.url());
     Q_EMIT signalThumbInfoReady(info);
 }
 
 // -- Cache management methods ------------------------------------------------------------
 
 const CachedItem* CameraThumbsCtrl::retrieveItemFromCache(const QUrl& url) const
 {
     return d->cache[url];
 }
 
 bool CameraThumbsCtrl::hasItemFromCache(const QUrl& url) const
 {
     return d->cache.contains(url);
 }
 
 void CameraThumbsCtrl::putItemToCache(const QUrl& url, const CamItemInfo& info, const QPixmap& thumb)
 {
     int infoCost  = sizeof(info);
     int thumbCost = thumb.width() * thumb.height() * thumb.depth() / 8;
     d->cache.insert(url, new CachedItem(info, thumb), infoCost + thumbCost);
 }
 
 void CameraThumbsCtrl::removeItemFromCache(const QUrl& url)
 {
     d->cache.remove(url);
 }
 
 void CameraThumbsCtrl::clearCache()
 {
     d->cache.clear();
 }
 
 void CameraThumbsCtrl::setCacheSize(int numberOfItems)
 {
     d->cache.setMaxCost(numberOfItems * (ThumbnailSize::maxThumbsSize() * ThumbnailSize::maxThumbsSize() *
                                          QPixmap(1, 1).depth() / 8) + (numberOfItems * sizeof(CamItemInfo)));
 }
 
 } // namespace Digikam
 
 #include "moc_camerathumbsctrl.cpp"