Avoid sorting items and creating thumbnails when loading metadata

Otherwice it has a big performance impact: it causes lots of
thumbnail reloads and resorts of FileThumbnailView.

Signed-off-by: Alexander Golubev <fatzer2@gmail.com>
(cherry picked from commit 53ce37eeca)

src/gvcore/filedetailview.cpp

@@ -251,7 +251,7 @@ void FileDetailView::updateView( bool b )
 	}
 }
 
-void FileDetailView::updateView( const KFileItem *i )
+void FileDetailView::updateView( const KFileItem *i, bool /*metaDataOnly*/ )
 {
 	if ( !i ) return;
 

src/gvcore/filedetailview.h

@@ -55,7 +55,8 @@ public:
 	virtual void clearView();
 
 	virtual void updateView( bool );
-	virtual void updateView(const KFileItem*);
+	using FileViewBase::updateView;
+	virtual void updateView(const KFileItem*, bool metaInfoOnly);
 	virtual void removeItem( const KFileItem* );
 	virtual void listingCompleted();
 

src/gvcore/filethumbnailview.cpp

@@ -454,15 +454,19 @@ void FileThumbnailView::insertItem(KFileItem* item) {
 }
 
 
-void FileThumbnailView::updateView(const KFileItem* fileItem) {
+void FileThumbnailView::updateView(const KFileItem* fileItem, bool metaInfoOnly) {
 	if (!fileItem) return;
-
 	FileThumbnailViewItem* iconItem=viewItem(this, fileItem);
 	if (iconItem) {
-		iconItem->setText(fileItem->text());
+		if (metaInfoOnly) {
-		updateThumbnail(fileItem);
+			iconItem->updateLines();
+			// Note: resort will be done when metadata is completely loaded
+		} else {
+			iconItem->setText(fileItem->text());
+			updateThumbnail(fileItem);
+			sortView();
+		}
 	}
-	sort();
 }
 
 
@@ -565,7 +569,7 @@ void FileThumbnailView::setSorting(TQDir::SortSpec spec) {
 		if (iconItem) setSortingKey(iconItem, item);
 	}
 
-	TDEIconView::sort(! (spec & TQDir::Reversed) );
+	sortView();
 }
 
 //--------------------------------------------------------------------------
@@ -769,6 +773,10 @@ void FileThumbnailView::prefetchDone() {
 	}
 }
 
+void FileThumbnailView::sortView() {
+	TDEIconView::sort( !(KFileView::sorting() & TQDir::Reversed) );
+}
+
 //--------------------------------------------------------------------------
 //
 // Protected

src/gvcore/filethumbnailview.h

@@ -65,7 +65,7 @@ public:
 	void setSelected(const KFileItem* item,bool enable);
 	bool isSelected(const KFileItem* item) const;
 	void removeItem(const KFileItem* item);
-	void updateView(const KFileItem* item);
+	void updateView(const KFileItem* item, bool metaInfoOnly);
 	void setSorting(TQDir::SortSpec);
 
 	KFileItem* firstFileItem() const;
@@ -95,6 +95,8 @@ public slots:
 
 	void showThumbnailDetailsDialog();
 
+	void sortView();
+
 signals:
 	void dropped(TQDropEvent*, KFileItem* target);
 

src/gvcore/fileviewbase.h

@@ -34,9 +34,15 @@ public:
 	
 	KFileItem* shownFileItem() const { return mShownFileItem; }
 	virtual void setShownFileItem(KFileItem* fileItem) { mShownFileItem=fileItem; }
-	
+
 	virtual void updateFromSettings() {}
 
+	using KFileView::updateView;
+	void updateView(const KFileItem* fileItem) override {
+		updateView(fileItem, false);
+	}
+	virtual void updateView(const KFileItem* fileItem, bool metaDataOnly) = 0;
+
 protected:
 	KFileItem* mShownFileItem;
 };

src/gvcore/fileviewcontroller.cpp

@@ -1063,10 +1063,11 @@ void FileViewController::dirListerRefreshItems(const KFileItemList& list) {
 	for (; *it!=0L; ++it) {
 		updateViewItem(*it);
 	}
+	loadMetaInfo(list, true);
 }
 
-void FileViewController::updateViewItem(const KFileItem *item) {
+void FileViewController::updateViewItem(const KFileItem *item, bool metaDataOnly) {
-	currentFileView()->updateView(item);
+	currentFileView()->updateView(item, metaDataOnly);
 	if (item==currentFileView()->shownFileItem()) {
 		emit shownFileItemRefreshed(item);
 	}
@@ -1114,7 +1115,7 @@ void FileViewController::delayedDirListerCompleted() {
 	// around is not in firstFileItem() because it's const and sort() is a non
 	// const method
 	if (mMode!=FILE_LIST) {
-		mFileThumbnailView->sort(mFileThumbnailView->sortDirection());
+		mFileThumbnailView->sortView();
 	}
 
 	if (mChangeDirStatus != CHANGE_DIR_STATUS_NONE) {
@@ -1339,7 +1340,14 @@ KFileItem* FileViewController::findItemByFileName(const TQString& fileName) cons
 //
 //-----------------------------------------------------------------------------
 
-void FileViewController::loadMetaInfo(const KFileItemList& items) {
+void FileViewController::loadMetaInfo(const KFileItemList& items, bool forceReload) {
+	if (forceReload) {
+		// Reset metadata of all items if we want MetaInfoJob to reload it
+		for(const auto& item: items) {
+			item->setMetaInfo(KFileMetaInfo());
+		}
+	}
+
 	if(d->mMetaInfoTodo.isEmpty()) {
 		d->mMetaInfoTodo = items;
 	} else {
@@ -1359,10 +1367,16 @@ void FileViewController::nextMetaInfoJob() {
 		connect( d->mMetaInfoJob, TQ_SIGNAL(result(TDEIO::Job *)),
 				this, TQ_SLOT(nextMetaInfoJob()) );
 		connect( d->mMetaInfoJob, TQ_SIGNAL( gotMetaInfo(const KFileItem *)),
-				this, TQ_SLOT(updateViewItem(const KFileItem *)) );
+				this, TQ_SLOT(updateItemMetaInfo(const KFileItem *)) );
 		d->mMetaInfoTodo.clear();
 	} else {
 		d->mMetaInfoJob = NULL;
+
+		// When we finished all metadata load we should update view sorting
+		// We can't do it during the item update due to performance impact
+		if (mMode!=FILE_LIST) {
+			mFileThumbnailView->sortView();
+		}
 	}
 }
 
@@ -1374,4 +1388,8 @@ void FileViewController::stopMetaInfoUpdate() {
 	}
 }
 
+void FileViewController::updateItemMetaInfo(const KFileItem *item) {
+	updateViewItem(item, /* metaInfoOnly = */ true);
+}
+
 } // namespace

src/gvcore/fileviewcontroller.h

@@ -174,7 +174,6 @@ private slots:
 	void toggleShowDotFiles();
 	void setSorting();
 	void updateSortMenu(TQDir::SortSpec);
-	void updateViewItem(const KFileItem *item);
 
 	// Dir lister slots
 	void dirListerDeleteItem(KFileItem* item);
@@ -185,10 +184,11 @@ private slots:
 	void dirListerCanceled();
 	void dirListerCompleted();
 
-	// Metadata info loader jobs
+	// Metadata info loader job's slots
-	void loadMetaInfo(const KFileItemList& items);
+	void loadMetaInfo(const KFileItemList& items, bool forceReload=false);
 	void nextMetaInfoJob();
 	void stopMetaInfoUpdate();
+	void updateItemMetaInfo(const KFileItem *item);
 
 	void openDropURLMenu(TQDropEvent*, KFileItem*);
 
@@ -246,6 +246,7 @@ private:
 	void emitURLChanged();
 	void updateActions();
 	void prefetch( KFileItem* item );
+	void updateViewItem(const KFileItem *item, bool metaInfoOnly=false);
 	
 	KFileItem* findFirstImage() const;
 	KFileItem* findLastImage() const;