see if a wallpaper plugin can handle (import, display, etc) a given mimetype; this may be different from the drop types supported!

svn path=/trunk/KDE/kdelibs/; revision=1217338

wallpaper.cpp

@@ -176,6 +176,12 @@ KPluginInfo::List Wallpaper::listWallpaperInfoForMimetype(const QString &mimetyp
     return KPluginInfo::fromServices(offers);
 }
 
+bool Wallpaper::supportsMimetype(const QString &mimetype) const
+{
+    return d->wallpaperDescription.isValid() &&
+           d->wallpaperDescription.service()->hasMimeType(mimetype);
+}
+
 Wallpaper *Wallpaper::load(const QString &wallpaperName, const QVariantList &args)
 {
     if (wallpaperName.isEmpty()) {

wallpaper.h

@@ -21,6 +21,7 @@
 #ifndef PLASMA_WALLPAPER_H
 #define PLASMA_WALLPAPER_H
 
+#include <kmimetype.h>
 #include <kplugininfo.h>
 
 #include <plasma/plasma.h>
@@ -177,6 +178,14 @@ class PLASMA_EXPORT Wallpaper : public QObject
          */
         KServiceAction renderingMode() const;
 
+        /**
+         * @return true if the mimetype is supported by this wallpaper and
+         *         can be used in renderering. Uses the MimeType= entry from
+         *         the .desktop file, and can include mimetypes that may not be
+         *         suitable for drag-and-drop purposes.
+         * @since 4.7
+         */
+        bool supportsMimetype(const QString &mimetype) const;
 
         /**
          * Sets the rendering mode for this wallpaper.