avoid unnecessary copies by using const & in foreach

svn path=/trunk/KDE/kdebase/apps/; revision=800783

src/dolphinview.cpp

@@ -301,7 +301,7 @@ KFileItemList DolphinView::selectedItems() const
     KFileItemList itemList;
 
     const QModelIndexList indexList = selection.indexes();
-    foreach (QModelIndex index, indexList) {
+    foreach (const QModelIndex &index, indexList) {
         KFileItem item = m_dolphinModel->itemForIndex(index);
         if (!item.isNull()) {
             itemList.append(item);
@@ -315,7 +315,7 @@ KUrl::List DolphinView::selectedUrls() const
 {
     KUrl::List urls;
     const KFileItemList list = selectedItems();
-    foreach (KFileItem item, list) {
+    foreach (const KFileItem &item, list) {
         urls.append(item.url());
     }
     return urls;
@@ -468,7 +468,7 @@ void DolphinView::setNameFilter(const QString& nameFilter)
 
 void DolphinView::calculateItemCount(int& fileCount, int& folderCount)
 {
-    foreach (KFileItem item, m_dirLister->items()) {
+    foreach (const KFileItem &item, m_dirLister->items()) {
         if (item.isDir()) {
             ++folderCount;
         } else {
@@ -524,7 +524,7 @@ void DolphinView::renameSelectedItems()
 
             // iterate through all selected items and rename them...
             int index = 1;
-            foreach (KFileItem item, items) {
+            foreach (const KFileItem &item, items) {
                 const KUrl& oldUrl = item.url();
                 QString number;
                 number.setNum(index++);

src/fileitemcapabilities.cpp

@@ -32,7 +32,7 @@ FileItemCapabilities::FileItemCapabilities(const KFileItemList& items) :
     m_isLocal(true)
 {
     QFileInfo parentDirInfo;
-    foreach (KFileItem item, items) {
+    foreach (const KFileItem &item, items) {
         const KUrl url = item.url();
         m_isLocal = m_isLocal && url.isLocalFile();
         m_supportsReading  = m_supportsReading  && KProtocolManager::supportsReading(url);

src/iconmanager.cpp

@@ -107,7 +107,7 @@ void IconManager::generatePreviews(const KFileItemList &items)
     // Order the items in a way that the preview for the visible items
     // is generated first, as this improves the feeled performance a lot.
     KFileItemList orderedItems;
-    foreach (KFileItem item, items) {
+    foreach (const KFileItem &item, items) {
         const QModelIndex dirIndex = m_dolphinModel->indexForItem(item);
         const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
         const QRect itemRect = m_view->visualRect(proxyIndex);
@@ -147,7 +147,7 @@ void IconManager::updateCutItems()
 {
     // restore the icons of all previously selected items to the
     // original state...
-    foreach (CutItem cutItem, m_cutItemsCache) {
+    foreach (const CutItem &cutItem, m_cutItemsCache) {
         const QModelIndex index = m_dolphinModel->indexForUrl(cutItem.url);
         if (index.isValid()) {
             m_dolphinModel->setData(index, QIcon(cutItem.pixmap), Qt::DecorationRole);
@@ -207,7 +207,7 @@ void IconManager::replaceIcon(const KFileItem& item, const QPixmap& pixmap)
     bool isOldPreview = true;
     const KUrl::List dirs = dirLister->directories();
     const QString itemDir = item.url().directory();
-    foreach (KUrl url, dirs) {
+    foreach (const KUrl &url, dirs) {
         if (url.path() == itemDir) {
             isOldPreview = false;
             break;
@@ -244,7 +244,7 @@ bool IconManager::isCutItem(const KFileItem& item) const
     const KUrl::List cutUrls = KUrl::List::fromMimeData(mimeData);
 
     const KUrl& itemUrl = item.url();
-    foreach (KUrl url, cutUrls) {
+    foreach (const KUrl &url, cutUrls) {
         if (url == itemUrl) {
             return true;
         }
@@ -263,11 +263,11 @@ void IconManager::applyCutItemEffect()
     KFileItemList items;
     KDirLister* dirLister = m_dolphinModel->dirLister();
     const KUrl::List dirs = dirLister->directories();
-    foreach (KUrl url, dirs) {
+    foreach (const KUrl &url, dirs) {
         items << dirLister->itemsForDir(url);
     }
 
-    foreach (KFileItem item, items) {
+    foreach (const KFileItem &item, items) {
         if (isCutItem(item)) {
             const QModelIndex index = m_dolphinModel->indexForItem(item);
             const QVariant value = m_dolphinModel->data(index, Qt::DecorationRole);

src/metadatawidget.cpp

@@ -123,7 +123,7 @@ void MetaDataWidget::setFiles(const KUrl::List& urls)
     d->files.clear();
     bool first = true;
     QList<Nepomuk::Resource> fileRes;
-    Q_FOREACH( KUrl url, urls ) {
+    Q_FOREACH( const KUrl &url, urls ) {
         Nepomuk::Resource file( url, Soprano::Vocabulary::Xesam::File() );
         d->files.insert( url, file );
         fileRes.append( file );

src/nepomukmassupdatejob.cpp

@@ -46,7 +46,7 @@ Nepomuk::MassUpdateJob::~MassUpdateJob()
 void Nepomuk::MassUpdateJob::setFiles( const KUrl::List& urls )
 {
     m_resources.clear();
-    foreach( KUrl url, urls ) {
+    foreach( const KUrl &url, urls ) {
         m_resources.append( Resource( url ) );
     }
     setTotalAmount( KJob::Files, m_resources.count() );

src/tagcloud/resourcetaggingwidget.cpp

@@ -57,7 +57,7 @@ void Nepomuk::ResourceTaggingWidget::Private::showTaggingPopup( const QPoint& po
 {
     popup->showAllTags();
     resourceTags = intersectTags( resources );
-    Q_FOREACH( Tag tag, resourceTags ) {
+    Q_FOREACH( const Tag &tag, resourceTags ) {
         popup->setTagSelected( tag, true );
     }
 

src/tagcloud/tagcloud.cpp

@@ -651,7 +651,7 @@ void Nepomuk::TagCloud::showTags( const QList<Tag>& tags )
     d->showAllTags = false;
     d->invalidateCachedValues();
     d->nodes.clear();
-    Q_FOREACH( Tag tag, tags ) {
+    Q_FOREACH( const Tag &tag, tags ) {
         TagNode node;
         node.tag = tag;
         node.weight = d->calculateWeight( tag );