Introducing icon theme support

Added some static functions to QIcon to support desktop
themes based on the freedesktop spec. It is not intended to
replace KIcon and the intention is to use it when available to
share icon cache between applications.

Applications currently using icon themes are Assistant, Designer
and the textedit demo.

Reviewed-by: ogoffart

1 files changed, 204 insertions, 566 deletions

diff --git a/src/gui/styles/qcommonstyle.cpp b/src/gui/styles/qcommonstyle.cpp
index c7feb2507d..3878856000 100644
--- a/src/gui/styles/qcommonstyle.cpp
+++ b/src/gui/styles/qcommonstyle.cpp
@@ -840,176 +840,8 @@ static void drawArrow(const QStyle *style, const QStyleOptionToolButton *toolbut
 #endif // QT_NO_TOOLBUTTON
 
 
-
 #ifdef Q_WS_X11 // These functions are used to parse the X11 freedesktop icon spec
-void QCommonStylePrivate::lookupIconTheme() const
-{
-    if (!themeName.isEmpty())
-        return;
-
-    QString dataDirs = QString::fromLocal8Bit(getenv("XDG_DATA_DIRS"));
-    if (dataDirs.isEmpty())
-        dataDirs = QLatin1String("/usr/local/share/:/usr/share/");
-    dataDirs += QLatin1Char(':') + QKde::kdeHome() + QLatin1String("/share");
-    dataDirs.prepend(QDir::homePath() + QLatin1String("/:"));
-    QStringList kdeDirs = QString::fromLocal8Bit(getenv("KDEDIRS")).split(QLatin1Char(':'), QString::SkipEmptyParts);
-    foreach (const QString &dirName, kdeDirs)
-        dataDirs.append(QLatin1Char(':') + dirName + QLatin1String("/share"));
-    iconDirs = dataDirs.split(QLatin1Char(':'));
-
-    QFileInfo fileInfo(QLatin1String("/usr/share/icons/default.kde"));
-    QDir dir(fileInfo.canonicalFilePath());
-    QString kdeDefault = (X11->desktopEnvironment != DE_KDE || X11->desktopVersion >= 4)
-                         ? QString::fromLatin1("oxygen") : QString::fromLatin1("crystalsvg");
-    QString defaultTheme = fileInfo.exists() ? dir.dirName() : kdeDefault;
-    QSettings settings(QKde::kdeHome() +
-                       QLatin1String("/share/config/kdeglobals"), QSettings::IniFormat);
-    settings.beginGroup(QLatin1String("Icons"));
-    themeName = settings.value(QLatin1String("Theme"), defaultTheme).toString();
-}
-
-QIconTheme QCommonStylePrivate::parseIndexFile(const QString &themeName) const
-{
-    Q_Q(const QCommonStyle);
-    QIconTheme theme;
-    QFile themeIndex;
-    QStringList parents;
-    QHash <int, QString> dirList;
-
-    for ( int i = 0 ; i < iconDirs.size() && !themeIndex.exists() ; ++i) {
-          QString contentDir = QLatin1String(iconDirs[i].startsWith(QDir::homePath()) ?
-                                "/.icons/" : "/icons/");
-          themeIndex.setFileName(iconDirs[i] + contentDir +
-                                 themeName + QLatin1String("/index.theme"));
-    }
-
-    if (themeIndex.open(QIODevice::ReadOnly | QIODevice::Text)) {
-
-        QTextStream in(&themeIndex);
-
-        while (!in.atEnd()) {
-
-            QString line = in.readLine();
-
-            if (line.startsWith(QLatin1String("Inherits="))) {
-                line = line.right(line.length() - 9);
-                parents = line.split(QLatin1Char(','));
-            }
-
-            if (line.startsWith(QLatin1Char('['))) {
-                line = line.trimmed();
-                line.chop(1);
-                QString dirName = line.right(line.length() - 1);
-                if (!in.atEnd()) {
-                    line = in.readLine();
-                    int size;
-                    if (line.startsWith(QLatin1String("Size="))) {
-                        size = line.right(line.length() - 5).toInt();
-                        if (size)
-                            dirList.insertMulti(size, dirName);
-                    }
-                }
-            }
-        }
-    }
-
-    if (q->inherits("QPlastiqueStyle")) {
-        QFileInfo fileInfo(QLatin1String("/usr/share/icons/default.kde"));
-        QDir dir(fileInfo.canonicalFilePath());
-        QString defaultKDETheme = dir.exists() ? dir.dirName() : QString::fromLatin1("crystalsvg");
-        if (!parents.contains(defaultKDETheme) && themeName != defaultKDETheme)
-            parents.append(defaultKDETheme);
-    } else if (parents.isEmpty() && themeName != QLatin1String("hicolor")) {
-        parents.append(QLatin1String("hicolor"));
-    }
-    theme = QIconTheme(dirList, parents);
-    return theme;
-}
-
-QPixmap QCommonStylePrivate::findIconHelper(int size,
-                                                   const QString &themeName,
-                                                   const QString &iconName,
-                                                   QStringList &visited) const
-{
-    QPixmap pixmap;
-
-    if (!themeName.isEmpty()) {
-
-        visited << themeName;
-        QIconTheme theme = themeList.value(themeName);
-
-        if (!theme.isValid()) {
-            theme = parseIndexFile(themeName);
-            themeList.insert(themeName, theme);
-        }
-
-        if (!theme.isValid())
-            return QPixmap();
-
-        QList <QString> subDirs = theme.dirList().values(size);
-
-        for ( int i = 0 ; i < iconDirs.size() ; ++i) {
-            for ( int j = 0 ; j < subDirs.size() ; ++j) {
-                QString contentDir = (iconDirs[i].startsWith(QDir::homePath())) ?
-                                     QLatin1String("/.icons/") : QLatin1String("/icons/");
-                QString fileName = iconDirs[i] + contentDir + themeName + QLatin1Char('/') + subDirs[j] + QLatin1Char('/') + iconName;
-                QFile file(fileName);
-                if (file.exists())
-                    pixmap.load(fileName);
-                if (!pixmap.isNull())
-                    break;
-            }
-        }
-
-        if (pixmap.isNull()) {
-            QStringList parents = theme.parents();
-            //search recursively through inherited themes
-            for (int i = 0 ; pixmap.isNull() && i < parents.size() ; ++i) {
-               QString parentTheme = parents[i].trimmed();
-               if (!visited.contains(parentTheme)) //guard against endless recursion
-                  pixmap = findIconHelper(size, parentTheme, iconName, visited);
-            }
-        }
-    }
-    return pixmap;
-}
-
-/*! \internal
-    find a pixmap with the given size and name from the freedesktop theme.
-*/
-QPixmap QCommonStylePrivate::findIcon(int size, const QString &name) const
-{
-    QIcon icon = QKde::kdeIcon(name);
-    if (!icon.isNull())
-        return icon.pixmap(size);
-
-    QPixmap pixmap;
-    QString pixmapName = QLatin1String("$qt") + name + QString::number(size);
-
-    if (QPixmapCache::find(pixmapName, pixmap))
-        return pixmap;
-
-    if (!themeName.isEmpty()) {
-        QStringList visited;
-        pixmap = findIconHelper(size, themeName, name, visited);
-    }
-    QPixmapCache::insert(pixmapName, pixmap);
-    return pixmap;
-}
 
-/*! \internal
-  create an Icon from the freedesktop theme.
- */
-QIcon QCommonStylePrivate::createIcon(const QString &name) const
-{
-    QIcon icon = QKde::kdeIcon(name);
-    if (icon.isNull()) {
-        icon.addPixmap(findIcon(16, name));
-        icon.addPixmap(findIcon(24, name));
-        icon.addPixmap(findIcon(32, name));
-    }
-    return icon;
-}
 /*!internal
 
 Checks if you are running KDE and looks up the toolbar
@@ -4859,8 +4691,24 @@ int QCommonStyle::pixelMetric(PixelMetric m, const QStyleOption *opt, const QWid
         ret = int(QStyleHelper::dpiScaled(6.));
         break;
 
-    case PM_TabBarIconSize:
     case PM_ToolBarIconSize:
+#ifdef Q_WS_X11
+        if (X11->desktopVersion >= 4) {
+            static int iconSize = 0;
+            if (!iconSize) {
+                QSettings settings(QKde::kdeHome() +
+                                   QLatin1String("/share/config/kdeglobals"), 
+                                   QSettings::IniFormat);
+                settings.beginGroup(QLatin1String("ToolbarIcons"));
+                iconSize = settings.value(QLatin1String("Size"), QLatin1String("22")).toInt();
+            }
+            ret = iconSize;
+        } else
+#endif
+            ret = proxy()->pixelMetric(PM_SmallIconSize, opt, widget);
+        break;
+
+    case PM_TabBarIconSize:
     case PM_ListViewIconSize:
         ret = proxy()->pixelMetric(PM_SmallIconSize, opt, widget);
         break;
@@ -5371,293 +5219,161 @@ QPixmap QCommonStyle::standardPixmap(StandardPixmap sp, const QStyleOption *opti
     Q_UNUSED(widget);
     Q_UNUSED(sp);
 #else
-#ifdef Q_WS_X11
-    Q_D(const QCommonStyle);
     QPixmap pixmap;
-    if (QApplication::desktopSettingsAware()) {
-        d->lookupIconTheme();
+
+    if (QApplication::desktopSettingsAware() && !QIcon::themeName().isEmpty()) {
         switch (sp) {
         case SP_DirHomeIcon:
-            {
-                pixmap = d->findIcon(16, QLatin1String("folder_home.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
-                break;
-            }
+            pixmap = QIcon::fromTheme(QLatin1String("user-home")).pixmap(16);
+            break;
         case SP_MessageBoxInformation:
-            {
-                pixmap = d->findIcon(32, QLatin1String("messagebox_info.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
-                break;
-            }
+            pixmap = QIcon::fromTheme(QLatin1String("messagebox_info")).pixmap(16);
+            break;
         case SP_MessageBoxWarning:
-            {
-                pixmap = d->findIcon(32, QLatin1String("messagebox_warning.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
-                break;
-            }
+            pixmap = QIcon::fromTheme(QLatin1String("messagebox_warning")).pixmap(16);
+            break;
         case SP_MessageBoxCritical:
-            {
-                pixmap = d->findIcon(32, QLatin1String("messagebox_critical.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
-                break;
-            }
+            pixmap = QIcon::fromTheme(QLatin1String("messagebox_critical")).pixmap(16);
+            break;
         case SP_MessageBoxQuestion:
-            {
-                pixmap = d->findIcon(32, QLatin1String("help.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
-                break;
-            }
+            pixmap = QIcon::fromTheme(QLatin1String("help")).pixmap(16);
+            break;
         case SP_DialogOpenButton:
         case SP_DirOpenIcon:
-            {
-                pixmap = d->findIcon(16, QLatin1String("folder-open.png"));
-                if (pixmap.isNull())
-                    pixmap = d->findIcon(16, QLatin1String("folder_open.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
-                break;
-            }
+            pixmap = QIcon::fromTheme(QLatin1String("folder-open")).pixmap(16);
+            break;
         case SP_FileIcon:
-            {
-                pixmap = d->findIcon(16, QLatin1String("text-x-generic.png"));
-                if (pixmap.isNull())
-                    pixmap = d->findIcon(16, QLatin1String("empty.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
-                break;
-            }
-        case SP_FileLinkIcon:
-            {
-                pixmap = d->findIcon(16, QLatin1String("link_overlay.png"));
-                if (!pixmap.isNull()) {
-                    QPixmap fileIcon = d->findIcon(16, QLatin1String("text-x-generic.png"));
-                    if (fileIcon.isNull())
-                        fileIcon = d->findIcon(16, QLatin1String("empty.png"));
-                    if (!fileIcon.isNull()) {
-                        QPainter painter(&fileIcon);
-                        painter.drawPixmap(0, 0, 16, 16, pixmap);
-                        return fileIcon;
-                    }
-                }
-                break;
-           }
+            pixmap = QIcon::fromTheme(QLatin1String("text-x-generic"),
+                                      QIcon::fromTheme(QLatin1String("empty"))).pixmap(16);
+            break;
         case SP_DirClosedIcon:
         case SP_DirIcon:
-            {
-                pixmap = d->findIcon(16, QLatin1String("folder.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("folder")).pixmap(16);
                 break;
-            }
-        case SP_DirLinkIcon:
-            {
-                pixmap = d->findIcon(16, QLatin1String("link_overlay.png"));
-                if (!pixmap.isNull()) {
-                    QPixmap dirIcon = d->findIcon(16, QLatin1String("folder.png"));
-                    if (!dirIcon.isNull()) {
-                        QPainter painter(&dirIcon);
-                        painter.drawPixmap(0, 0, 16, 16, pixmap);
-                        return dirIcon;
-                    }
-                }
-                break;
-           }
         case SP_DriveFDIcon:
-            {
-                pixmap = d->findIcon(16, QLatin1String("media-floppy.png"));
-                if (pixmap.isNull())
-                    pixmap = d->findIcon(16, QLatin1String("3floppy_unmount.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("media-floppy"),
+                                          QIcon::fromTheme(QLatin1String("3floppy_unmount"))).pixmap(16);
                 break;
-            }
         case SP_ComputerIcon:
-            {
-                pixmap = d->findIcon(16, QLatin1String("computer.png"));
-                if (pixmap.isNull())
-                    pixmap = d->findIcon(16, QLatin1String("system.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("computer"),
+                                          QIcon::fromTheme(QLatin1String("system"))).pixmap(16);
                 break;
-            }
         case SP_DesktopIcon:
-            {
-                pixmap = d->findIcon(16, QLatin1String("user-desktop.png"));
-                if (pixmap.isNull())
-                    pixmap = d->findIcon(16, QLatin1String("desktop.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("user-desktop"),
+                                          QIcon::fromTheme(QLatin1String("desktop"))).pixmap(16);
                 break;
-            }
         case SP_TrashIcon:
-            {
-                pixmap = d->findIcon(16, QLatin1String("user-trash.png"));
-                if (pixmap.isNull())
-                    pixmap = d->findIcon(16, QLatin1String("trashcan_empty.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("user-trash"),
+                                          QIcon::fromTheme(QLatin1String("trashcan_empty"))).pixmap(16);
                 break;
-            }
         case SP_DriveCDIcon:
         case SP_DriveDVDIcon:
-            {
-                pixmap = d->findIcon(16, QLatin1String("media-optical.png"));
-                if (pixmap.isNull())
-                    pixmap = d->findIcon(16, QLatin1String("cdrom_unmount.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("media-optical"),
+                                          QIcon::fromTheme(QLatin1String("cdrom_unmount"))).pixmap(16);
                 break;
-            }
         case SP_DriveHDIcon:
-            {
-                pixmap = d->findIcon(16, QLatin1String("drive-harddisk.png"));
-                if (pixmap.isNull())
-                    pixmap = d->findIcon(16, QLatin1String("hdd_unmount.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("drive-harddisk"),
+                                          QIcon::fromTheme(QLatin1String("hdd_unmount"))).pixmap(16);
                 break;
-            }
         case SP_FileDialogToParent:
-            {
-                pixmap = d->findIcon(32, QLatin1String("go-up.png"));
-                if (pixmap.isNull())
-                    pixmap = d->findIcon(32, QLatin1String("up.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("go-up"),
+                                          QIcon::fromTheme(QLatin1String("up"))).pixmap(16);
                 break;
-            }
         case SP_FileDialogNewFolder:
-            {
-                pixmap = d->findIcon(16, QLatin1String("folder_new.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("folder_new")).pixmap(16);
                 break;
-            }
         case SP_ArrowUp:
-            {
-                pixmap = d->findIcon(32, QLatin1String("go-up.png"));
-                if (pixmap.isNull())
-                    pixmap = d->findIcon(32, QLatin1String("up.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("go-up"),
+                                          QIcon::fromTheme(QLatin1String("up"))).pixmap(16);
                 break;
-            }
         case SP_ArrowDown:
-            {
-                pixmap = d->findIcon(32, QLatin1String("go-down.png"));
-                if (pixmap.isNull())
-                    pixmap = d->findIcon(32, QLatin1String("down.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("go-down"),
+                                          QIcon::fromTheme(QLatin1String("down"))).pixmap(16);
                 break;
-            }
         case SP_ArrowRight:
-            {
-                pixmap = d->findIcon(32, QLatin1String("go-next.png"));
-                if (pixmap.isNull())
-                    pixmap = d->findIcon(32, QLatin1String("forward.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("go-next"),
+                                          QIcon::fromTheme(QLatin1String("forward"))).pixmap(16);
                 break;
-            }
         case SP_ArrowLeft:
-            {
-                pixmap = d->findIcon(32, QLatin1String("go-previous.png"));
-                if (pixmap.isNull())
-                    pixmap = d->findIcon(32, QLatin1String("back.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("go-previous"),
+                                          QIcon::fromTheme(QLatin1String("back"))).pixmap(16);
                 break;
-            }
         case SP_FileDialogDetailedView:
-            {
-                pixmap = d->findIcon(16, QLatin1String("view_detailed.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("view_detailed")).pixmap(16);
                 break;
-            }
-
         case SP_FileDialogListView:
-            {
-                pixmap = d->findIcon(16, QLatin1String("view_icon.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("view_icon")).pixmap(16);
                 break;
-            }
         case SP_BrowserReload:
-            {
-                pixmap = d->findIcon(32, QLatin1String("reload.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("reload")).pixmap(16);
                 break;
-            }
         case SP_BrowserStop:
-            {
-                pixmap = d->findIcon(32, QLatin1String("stop.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("process-stop")).pixmap(16);
                 break;
-            }
         case SP_MediaPlay:
-            {
-                pixmap = d->findIcon(16, QLatin1String("player_play.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("media-playback-start")).pixmap(16);
                 break;
-            }
         case SP_MediaPause:
-            {
-                pixmap = d->findIcon(16, QLatin1String("player_pause.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("media-playback-pause")).pixmap(16);
                 break;
-            }
         case SP_MediaStop:
-            {
-                pixmap = d->findIcon(16, QLatin1String("player_stop.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("media-playback-stop")).pixmap(16);
                 break;
-            }
         case SP_MediaSeekForward:
-            {
-                pixmap = d->findIcon(16, QLatin1String("player_fwd.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("media-seek-forward")).pixmap(16);
                 break;
-            }
         case SP_MediaSeekBackward:
-            {
-                pixmap = d->findIcon(16, QLatin1String("player_rew.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("media-seek-backward")).pixmap(16);
                 break;
-            }
         case SP_MediaSkipForward:
-            {
-                pixmap = d->findIcon(16, QLatin1String("player_end.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("media-skip-backward")).pixmap(16);
                 break;
-            }
         case SP_MediaSkipBackward:
-            {
-                pixmap = d->findIcon(16, QLatin1String("player_start.png"));
-                if (!pixmap.isNull())
-                    return pixmap;
+                pixmap = QIcon::fromTheme(QLatin1String("media-skip-backward")).pixmap(16);
+                break;
+        case SP_DialogResetButton:
+                pixmap = QIcon::fromTheme(QLatin1String("edit-clear")).pixmap(24);
+                break;
+        case SP_DialogHelpButton:
+                pixmap = QIcon::fromTheme(QLatin1String("help-contents")).pixmap(24);
+                break;
+        case SP_DialogCancelButton:
+                pixmap = QIcon::fromTheme(QLatin1String("process-stop")).pixmap(24);
+                break;
+        case SP_DialogSaveButton:
+                pixmap = QIcon::fromTheme(QLatin1String("document-save")).pixmap(24);
                 break;
+            case SP_FileLinkIcon:
+            pixmap = QIcon::fromTheme(QLatin1String("emblem-symbolic-link")).pixmap(16);
+            if (!pixmap.isNull()) {
+                QPixmap fileIcon = QIcon::fromTheme(QLatin1String("text-x-generic")).pixmap(16);
+                if (fileIcon.isNull())
+                    fileIcon = QIcon::fromTheme(QLatin1String("empty")).pixmap(16);
+                if (!fileIcon.isNull()) {
+                    QPainter painter(&fileIcon);
+                    painter.drawPixmap(0, 0, 16, 16, pixmap);
+                    return fileIcon;
+                }
             }
-
+            break;
+        case SP_DirLinkIcon:
+                pixmap = QIcon::fromTheme(QLatin1String("emblem-symbolic-link")).pixmap(16);
+                if (!pixmap.isNull()) {
+                    QPixmap dirIcon = QIcon::fromTheme(QLatin1String("folder")).pixmap(16);
+                    if (!dirIcon.isNull()) {
+                        QPainter painter(&dirIcon);
+                        painter.drawPixmap(0, 0, 16, 16, pixmap);
+                        return dirIcon;
+                    }
+                }
+                break;
         default:
             break;
         }
     }
-#endif //Q_WS_X11
+
+    if (!pixmap.isNull())
+        return pixmap;
 #endif //QT_NO_IMAGEFORMAT_PNG
     switch (sp) {
 #ifndef QT_NO_IMAGEFORMAT_XPM
@@ -5793,254 +5509,178 @@ QIcon QCommonStyle::standardIconImplementation(StandardPixmap standardIcon, cons
                                                const QWidget *widget) const
 {
     QIcon icon;
-    if (QApplication::desktopSettingsAware()) {
-#ifdef Q_WS_X11
-        Q_D(const QCommonStyle);
-        d->lookupIconTheme();
-        QPixmap pixmap;
+    if (QApplication::desktopSettingsAware() && !QIcon::themeName().isEmpty()) {
         switch (standardIcon) {
         case SP_DirHomeIcon:
-            {
-                icon = d->createIcon(QLatin1String("folder_home.png"));
+                icon = QIcon::fromTheme(QLatin1String("user-home"));
                 break;
-            }
         case SP_MessageBoxInformation:
-            {
-                icon = d->createIcon(QLatin1String("dialog-information.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("messagebox_info.png"));
+                icon = QIcon::fromTheme(QLatin1String("dialog-information"));
                 break;
-            }
         case SP_MessageBoxWarning:
-            {
-                icon = d->createIcon(QLatin1String("dialog-warning.png"));
-                icon = d->createIcon(QLatin1String("dialog-warning.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("messagebox_warning.png"));
+                icon = QIcon::fromTheme(QLatin1String("dialog-warning"));
                 break;
-            }
         case SP_MessageBoxCritical:
-            {
-                icon = d->createIcon(QLatin1String("dialog-error.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("messagebox_critical.png"));
+                icon = QIcon::fromTheme(QLatin1String("dialog-error"));
                 break;
-            }
         case SP_MessageBoxQuestion:
-            {
-                icon = d->createIcon(QLatin1String("help.png"));
+                icon = QIcon::fromTheme(QLatin1String("dialog-question"));
                 break;
-            }
         case SP_DialogOpenButton:
         case SP_DirOpenIcon:
-            {
-                icon = d->createIcon(QLatin1String("folder-open.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("folder_open.png"));
+                icon = QIcon::fromTheme(QLatin1String("folder-open"));
                 break;
-            }
         case SP_FileIcon:
-            {
-                icon = d->createIcon(QLatin1String("text-x-generic.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("empty.png"));
+                icon = QIcon::fromTheme(QLatin1String("text-x-generic"));
                 break;
-            }
         case SP_DirClosedIcon:
         case SP_DirIcon:
-            {
-                icon = d->createIcon(QLatin1String("folder.png"));
+                icon = QIcon::fromTheme(QLatin1String("folder"));
                 break;
-            }
         case SP_DriveFDIcon:
-            {
-                icon = d->createIcon(QLatin1String("floppy_unmount.png"));
+                icon = QIcon::fromTheme(QLatin1String("floppy_unmount"));
                 break;
-            }
         case SP_ComputerIcon:
-            {
-                icon = d->createIcon(QLatin1String("computer.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("system.png"));
+                icon = QIcon::fromTheme(QLatin1String("computer"),
+                                        QIcon::fromTheme(QLatin1String("system")));
                 break;
-            }
         case SP_DesktopIcon:
-            {
-                icon = d->createIcon(QLatin1String("user-desktop.png"));
+                icon = QIcon::fromTheme(QLatin1String("user-desktop"));
                 break;
-            }
         case SP_TrashIcon:
-            {
-                icon = d->createIcon(QLatin1String("user-trash.png"));
+                icon = QIcon::fromTheme(QLatin1String("user-trash"));
                 break;
-            }
         case SP_DriveCDIcon:
         case SP_DriveDVDIcon:
-            {
-                icon = d->createIcon(QLatin1String("media-optical.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("cdrom_unmount.png"));
+                icon = QIcon::fromTheme(QLatin1String("media-optical"));
                 break;
-            }
         case SP_DriveHDIcon:
-            {
-                icon = d->createIcon(QLatin1String("drive-harddisk.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("hdd_unmount.png"));
+                icon = QIcon::fromTheme(QLatin1String("drive-harddisk"));
                 break;
-            }
         case SP_FileDialogToParent:
-            {
-                icon = d->createIcon(QLatin1String("go-up.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("up.png"));
+                icon = QIcon::fromTheme(QLatin1String("go-up"));
                 break;
-            }
         case SP_FileDialogNewFolder:
-            {
-                icon = d->createIcon(QLatin1String("folder_new.png"));
+                icon = QIcon::fromTheme(QLatin1String("folder-new"));
                 break;
-            }
         case SP_ArrowUp:
-            {
-                icon = d->createIcon(QLatin1String("go-up.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("up.png"));
+                icon = QIcon::fromTheme(QLatin1String("go-up"));
                 break;
-            }
         case SP_ArrowDown:
-            {
-                icon = d->createIcon(QLatin1String("go-down.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("down.png"));
+                icon = QIcon::fromTheme(QLatin1String("go-down"));
                 break;
-            }
         case SP_ArrowRight:
-            {
-                icon = d->createIcon(QLatin1String("go-next.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("forward.png"));
+                icon = QIcon::fromTheme(QLatin1String("go-next"));
                 break;
-            }
         case SP_ArrowLeft:
-            {
-                icon = d->createIcon(QLatin1String("go-previous.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("back.png"));
+                icon = QIcon::fromTheme(QLatin1String("go-previous"));
+                break;
+        case SP_DialogHelpButton:
+                icon = QIcon::fromTheme(QLatin1String("help-contents"));
+                break;
+        case SP_DialogCancelButton:
+                icon = QIcon::fromTheme(QLatin1String("process-stop"));
+                break;
+        case SP_DialogCloseButton:
+                icon = QIcon::fromTheme(QLatin1String("window-close"));
+                break;
+        case SP_DialogApplyButton:
+                icon = QIcon::fromTheme(QLatin1String("dialog-ok-apply"));
+                break;
+        case SP_DialogOkButton:
+                icon = QIcon::fromTheme(QLatin1String("dialog-ok"));
                 break;
-            }
         case SP_FileDialogDetailedView:
-            {
-                icon = d->createIcon(QLatin1String("view-list-details.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("view_detailed.png"));
+                icon = QIcon::fromTheme(QLatin1String("view-list-details"));
                 break;
-            }
         case SP_FileDialogListView:
-            {
-                icon = d->createIcon(QLatin1String("view-list-icons.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("view_icon.png"));
+                icon = QIcon::fromTheme(QLatin1String("view-list-icons"));
                 break;
-            }
         case SP_BrowserReload:
-            {
-                icon = d->createIcon(QLatin1String("view-refresh.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("reload.png"));
+                icon = QIcon::fromTheme(QLatin1String("view-refresh"));
                 break;
-            }
         case SP_BrowserStop:
-            {
-                icon = d->createIcon(QLatin1String("process-stop.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("stop.png"));
+                icon = QIcon::fromTheme(QLatin1String("process-stop"));
                 break;
-            }
         case SP_MediaPlay:
-            {
-                icon = d->createIcon(QLatin1String("media-playback-start.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("player_play.png"));
+                icon = QIcon::fromTheme(QLatin1String("media-playback-start"));
                 break;
-            }
         case SP_MediaPause:
-            {
-                icon = d->createIcon(QLatin1String("media-playback-pause.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("player_pause.png"));
+                icon = QIcon::fromTheme(QLatin1String("media-playback-pause"));
                 break;
-            }
         case SP_MediaStop:
-            {
-                icon = d->createIcon(QLatin1String("media-playback-stop.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("player_stop.png"));
+                icon = QIcon::fromTheme(QLatin1String("media-playback-stop"));
                 break;
-            }
         case SP_MediaSeekForward:
-            {
-                icon = d->createIcon(QLatin1String("media-skip-forward.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("player_fwd.png"));
+                icon = QIcon::fromTheme(QLatin1String("media-seek-forward"));
                 break;
-            }
         case SP_MediaSeekBackward:
-            {
-                icon = d->createIcon(QLatin1String("media-skip-backward.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("player_rew.png"));
+                icon = QIcon::fromTheme(QLatin1String("media-seek-backward"));
                 break;
-            }
         case SP_MediaSkipForward:
-            {
-                icon = d->createIcon(QLatin1String("media-skip-forward.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("player_end.png"));
+                icon = QIcon::fromTheme(QLatin1String("media-skip-forward"));
                 break;
-            }
         case SP_MediaSkipBackward:
-            {
-                icon = d->createIcon(QLatin1String("media-skip-backward.png"));
-                if (icon.isNull())
-                    icon = d->createIcon(QLatin1String("player_start.png"));
+                icon = QIcon::fromTheme(QLatin1String("media-skip-backward"));
                 break;
-            }
-
-        case SP_FileLinkIcon: {
-            icon = QIcon(proxy()->standardPixmap(standardIcon, option, widget));
-            QPixmap pixmap = d->findIcon(32, QLatin1String("link_overlay.png"));
-            if (!pixmap.isNull()) {
-                QPixmap fileIcon = d->findIcon(32, QLatin1String("text-x-generic.png"));
-                if (fileIcon.isNull())
-                    fileIcon = d->findIcon(32, QLatin1String("empty.png"));
-                if (!fileIcon.isNull()) {
-                    QPainter painter(&fileIcon);
-                    painter.drawPixmap(0, 0, 32, 32, pixmap);
-                    icon.addPixmap(fileIcon);
+        case SP_MediaVolume:
+                icon = QIcon::fromTheme(QLatin1String("audio-volume-medium"));
+                break;
+        case SP_MediaVolumeMuted:
+                icon = QIcon::fromTheme(QLatin1String("audio-volume-muted"));
+                break;
+        case SP_DialogResetButton:
+                icon = QIcon::fromTheme(QLatin1String("edit-clear"));
+                break;
+        case SP_ArrowForward:
+            if (QApplication::layoutDirection() == Qt::RightToLeft)
+                return standardIconImplementation(SP_ArrowLeft, option, widget);
+            return standardIconImplementation(SP_ArrowRight, option, widget);
+        case SP_ArrowBack:
+            if (QApplication::layoutDirection() == Qt::RightToLeft)
+                return standardIconImplementation(SP_ArrowRight, option, widget);
+            return standardIconImplementation(SP_ArrowLeft, option, widget);
+        case SP_FileLinkIcon:
+            {
+                QIcon linkIcon = QIcon::fromTheme(QLatin1String("emblem-symbolic-link"));
+                if (!linkIcon.isNull()) {
+                    QIcon baseIcon = standardIconImplementation(SP_FileIcon, option, widget);
+                    const QList<QSize> sizes = baseIcon.availableSizes(QIcon::Normal, QIcon::Off);
+                    for (int i = 0 ; i < sizes.size() ; ++i) {
+                        int size = sizes[i].width();
+                        QPixmap basePixmap = baseIcon.pixmap(size);
+                        QPixmap linkPixmap = linkIcon.pixmap(size/2);
+                        QPainter painter(&basePixmap);
+                        painter.drawPixmap(size/2, size/2, linkPixmap);
+                        icon.addPixmap(basePixmap);
+                    }
                 }
             }
-        }
-        break;
-        case SP_DirLinkIcon: {
-            icon = QIcon(proxy()->standardPixmap(standardIcon, option, widget));
-            QPixmap pixmap = d->findIcon(32, QLatin1String("link_overlay.png"));
-            if (!pixmap.isNull()) {
-                QPixmap fileIcon = d->findIcon(32, QLatin1String("folder.png"));
-                if (!fileIcon.isNull()) {
-                    QPainter painter(&fileIcon);
-                    painter.drawPixmap(0, 0, 32, 32, pixmap);
-                    icon.addPixmap(fileIcon);
+            break;
+        case SP_DirLinkIcon:
+            {
+                QIcon linkIcon = QIcon::fromTheme(QLatin1String("emblem-symbolic-link"));
+                if (!linkIcon.isNull()) {
+                    QIcon baseIcon = standardIconImplementation(SP_DirIcon, option, widget);
+                    const QList<QSize> sizes = baseIcon.availableSizes(QIcon::Normal, QIcon::Off);
+                    for (int i = 0 ; i < sizes.size() ; ++i) {
+                        int size = sizes[i].width();
+                        QPixmap basePixmap = baseIcon.pixmap(size);
+                        QPixmap linkPixmap = linkIcon.pixmap(size/2);
+                        QPainter painter(&basePixmap);
+                        painter.drawPixmap(size/2, size/2, linkPixmap);
+                        icon.addPixmap(basePixmap);
+                    }
                 }
-            }
         }
         break;
         default:
             break;
         }
+
         if (!icon.isNull())
             return icon;
-#elif defined(Q_WS_MAC)
+#if defined(Q_WS_MAC)
     OSType iconType = 0;
     switch (standardIcon) {
     case QStyle::SP_MessageBoxQuestion:
@@ -6131,11 +5771,9 @@ QIcon QCommonStyle::standardIconImplementation(StandardPixmap standardIcon, cons
             ReleaseIconRef(overlayIcon);
         return retIcon;
     }
-
-#endif //Q_WS_X11 || Q_WS_MAC
+#endif // Q_WS_MAC
     }
 
-
     switch (standardIcon) {
 #ifndef QT_NO_IMAGEFORMAT_PNG
      case SP_FileDialogNewFolder: