[rygel] core: Filter unsupported sort criterias from XBox

[Jens Georg <jensgeorg src gnome org>]

commit 0cc5aa9480387a89833b220e47d87ae939571c2d
Author: Jens Georg <mail jensge org>
Date:   Sun Nov 27 19:10:01 2011 +0100

    core: Filter unsupported sort criterias from XBox
    
    This fixes the "Slideshow" option when selected from top-level picture
    browsing dialog.

 src/rygel/rygel-client-hacks.vala       |    2 ++
 src/rygel/rygel-media-query-action.vala |    4 ++++
 src/rygel/rygel-xbox-hacks.vala         |    8 ++++++++
 3 files changed, 14 insertions(+), 0 deletions(-)
---
diff --git a/src/rygel/rygel-client-hacks.vala b/src/rygel/rygel-client-hacks.vala
index e3944a5..a867d8e 100644
--- a/src/rygel/rygel-client-hacks.vala
+++ b/src/rygel/rygel-client-hacks.vala
@@ -97,6 +97,8 @@ internal abstract class Rygel.ClientHacks : GLib.Object {
 
     public virtual void apply (MediaItem item) {}
 
+    public virtual void filter_sort_criteria (ref string sort_criteria) {}
+
     public virtual async MediaObjects? search
                                         (SearchableContainer container,
                                          SearchExpression?   expression,
diff --git a/src/rygel/rygel-media-query-action.vala b/src/rygel/rygel-media-query-action.vala
index 1db1236..417a205 100644
--- a/src/rygel/rygel-media-query-action.vala
+++ b/src/rygel/rygel-media-query-action.vala
@@ -130,6 +130,10 @@ internal abstract class Rygel.MediaQueryAction : GLib.Object, StateMachine {
             this.sort_criteria = DEFAULT_SORT_CRITERIA;
         }
 
+        if (this.hacks != null) {
+            hacks.filter_sort_criteria (ref this.sort_criteria);
+        }
+
         this.validate_sort_criteria ();
 
         if (this.hacks != null) {
diff --git a/src/rygel/rygel-xbox-hacks.vala b/src/rygel/rygel-xbox-hacks.vala
index 92c4d0c..4030b30 100644
--- a/src/rygel/rygel-xbox-hacks.vala
+++ b/src/rygel/rygel-xbox-hacks.vala
@@ -98,6 +98,14 @@ internal class Rygel.XBoxHacks : ClientHacks {
         }
     }
 
+    public override void filter_sort_criteria (ref string sort_criteria) {
+        sort_criteria = sort_criteria.replace ("+microsoft:sourceURL", "");
+        sort_criteria = sort_criteria.replace (",,", ",");
+        if (sort_criteria.has_prefix (",")) {
+            sort_criteria = sort_criteria.slice (1, sort_criteria.length);
+        }
+    }
+
     public override async MediaObjects? search
                                         (SearchableContainer container,
                                          SearchExpression?   expression,