QGuiPlatformPlugin: QFileIconProvider and QIcon backend.

Add a backend for QFileIconProvider in the platform plugin

Also change the QIcon::fromTheme backend in the platform plugin:
On KDE, we unfortunately can't use KIcon as backend, as the current
API doesn't let us know easily (and quickly) wether we should use
the fallback or not (KDE always fallback to the question mark
"unknown" icon)
So we will use the QIconLoader even on KDE.
But we need to make sure that the theme name and the icon search paths
are correct. Ask that to the platform plugin

Reviewed-by: Jens Bache-Wiig

1 files changed, 66 insertions, 2 deletions

diff --git a/src/gui/kernel/qguiplatformplugin.cpp b/src/gui/kernel/qguiplatformplugin.cpp
index c48b8f6..6e074a1 100644
--- a/src/gui/kernel/qguiplatformplugin.cpp
+++ b/src/gui/kernel/qguiplatformplugin.cpp
@@ -41,6 +41,9 @@
 
 #include "qguiplatformplugin_p.h"
 #include <qdebug.h>
+#include <qfile.h>
+#include <qdir.h>
+#include <qsettings.h>
 #include "private/qfactoryloader_p.h"
 #include "qstylefactory.h"
 #include "qapplication.h"
@@ -58,6 +61,7 @@ extern bool qt_wince_is_pocket_pc();  //qguifunctions_wince.cpp
 #if defined(Q_WS_X11)
 #include "qkde_p.h"
 #include "qt_x11_p.h"
+#include <private/gtksymbols_p.h>
 #endif
 
 
@@ -194,8 +198,68 @@ QPalette QGuiPlatformPlugin::palette()
     return QPalette();
 }
 
-/* backend for QIcon::fromTheme. A null icon means it uses the default backend */
-QIcon QGuiPlatformPlugin::loadIcon(const QString &name)
+/* the default icon theme name for QIcon::fromTheme. */
+QString QGuiPlatformPlugin::systemIconThemeName()
+{
+    QString result;
+#ifdef Q_WS_X11
+    if (X11->desktopEnvironment == DE_GNOME) {
+        result = QString::fromLatin1("gnome");
+#ifndef QT_NO_STYLE_GTK
+        result = QGtk::getGConfString(QLatin1String("/desktop/gnome/interface/icon_theme"), result);
+#endif
+    } else if (X11->desktopEnvironment == DE_KDE) {
+        result =  X11->desktopVersion >= 4 ? QString::fromLatin1("oxygen") : QString::fromLatin1("crystalsvg");
+        QSettings settings(QKde::kdeHome() + QLatin1String("/share/config/kdeglobals"), QSettings::IniFormat);
+        settings.beginGroup(QLatin1String("Icons"));
+        result = settings.value(QLatin1String("Theme"), result).toString();
+    }
+#endif
+    return result;
+}
+
+
+QStringList QGuiPlatformPlugin::iconThemeSearchPaths()
+{
+    QStringList paths;
+#if defined(Q_WS_X11)
+    QString xdgDirString = QFile::decodeName(getenv("XDG_DATA_DIRS"));
+    if (xdgDirString.isEmpty())
+        xdgDirString = QLatin1String("/usr/local/share/:/usr/share/");
+
+    QStringList xdgDirs = xdgDirString.split(QLatin1Char(':'));
+
+    for (int i = 0 ; i < xdgDirs.size() ; ++i) {
+        QDir dir(xdgDirs[i]);
+        if (dir.exists())
+            paths.append(dir.path() + QLatin1String("/icons"));
+    }
+    if (X11->desktopEnvironment == DE_KDE) {
+        paths << QLatin1Char(':') + QKde::kdeHome() + QLatin1String("/share/icons");
+        QStringList kdeDirs = QFile::decodeName(getenv("KDEDIRS")).split(QLatin1Char(':'));
+        for (int i = 0 ; i< kdeDirs.count() ; ++i) {
+            QDir dir(QLatin1Char(':') + kdeDirs.at(i) + QLatin1String("/share/icons"));
+            if (dir.exists())
+                paths.append(dir.path());
+        }
+    }
+
+    // Add home directory first in search path
+    QDir homeDir(QDir::homePath() + QLatin1String("/.icons"));
+    if (homeDir.exists())
+        paths.prepend(homeDir.path());
+#endif
+
+#if defined(Q_WS_WIN)
+    paths.append(qApp->applicationDirPath() + QLatin1String("/icons"));
+#elif defined(Q_WS_MAC)
+    paths.append(qApp->applicationDirPath() + QLatin1String("/../Resources/icons"));
+#endif
+    return paths;
+}
+
+/* backend for QFileIconProvider,  null icon means default */
+QIcon QGuiPlatformPlugin::fileSystemIcon(const QFileInfo &)
 {
     return QIcon();
 }