* skins2/src/theme.cpp: allow specifying lists of IDs for bitmaps and fonts,

   in controls. The first valid one will be used. This is particularly useful
   for winamp skin, where you cannot know in advance the size of some images,
   so you can define 2 bitmaps, but only one control.

modules/gui/skins2/src/theme.cpp

@@ -126,14 +126,42 @@ void Theme::saveConfig()
     } \
     return (*it).second.get();
 
+// This macro takes an ID of the form "id1;id2;id3", and returns the object
+// corresponding to the first valid ID. If no ID is valid, it returns NULL.
+// XXX: should we use a template method instead?
+#define FIND_FIRST_OBJECT( mapDataPtr, mapName ) \
+    string rightPart = id; \
+    string::size_type pos; \
+    do \
+    { \
+        pos = rightPart.find( ";" ); \
+        string leftPart = rightPart.substr( 0, pos ); \
+        map<string, mapDataPtr>::const_iterator it = mapName.find( leftPart ); \
+        if( it != mapName.end() ) \
+        { \
+            return (*it).second.get(); \
+            break; \
+        } \
+ \
+        if( pos != string::npos ) \
+        { \
+            rightPart = rightPart.substr( pos, rightPart.size() ); \
+            rightPart = \
+                rightPart.substr( rightPart.find_first_not_of( " \t;" ), \
+                                  rightPart.size() ); \
+        } \
+    } \
+    while( pos != string::npos ); \
+    return NULL;
+
 GenericBitmap *Theme::getBitmapById( const string &id )
 {
-    FIND_OBJECT( GenericBitmapPtr, m_bitmaps );
+    FIND_FIRST_OBJECT( GenericBitmapPtr, m_bitmaps );
 }
 
 GenericFont *Theme::getFontById( const string &id )
 {
-    FIND_OBJECT( GenericFontPtr, m_fonts );
+    FIND_FIRST_OBJECT( GenericFontPtr, m_fonts );
 }
 
 TopWindow *Theme::getWindowById( const string &id )