[glide] API guards for GlideSlide

[Robert Carr <racarr src gnome org>]

commit ea3dec5f86dc338a9b4c787793ccea4e056cf8eb
Author: Robert Carr <racarr Valentine localdomain>
Date:   Fri May 7 13:30:24 2010 -0400

    API guards for GlideSlide

 libglide/glide-slide.c |   23 ++++++++++++++++++++++-
 1 files changed, 22 insertions(+), 1 deletions(-)
---
diff --git a/libglide/glide-slide.c b/libglide/glide-slide.c
index 69beb93..de9bb1d 100644
--- a/libglide/glide-slide.c
+++ b/libglide/glide-slide.c
@@ -669,6 +669,9 @@ glide_slide_init (GlideSlide *self)
 void
 glide_slide_add_actor_content (GlideSlide *slide, ClutterActor *actor)
 {
+  g_return_if_fail (GLIDE_IS_SLIDE (slide));
+  g_return_if_fail (CLUTTER_IS_ACTOR (actor));
+
   clutter_container_add_actor (CLUTTER_CONTAINER (slide->priv->contents_group), actor);
 }
 
@@ -678,11 +681,12 @@ glide_slide_add_actor_content (GlideSlide *slide, ClutterActor *actor)
  *
  * Constructs a new slide, belonging to @document.
  *
- * Return value: The newly allocated #GlideSlide
+ * Return value: The newly allocated #GlideSlide.
  */
 GlideSlide*
 glide_slide_new (GlideDocument *document)
 {
+  g_return_val_if_fail (GLIDE_IS_DOCUMENT (document), NULL);
   return g_object_new (GLIDE_TYPE_SLIDE, 
 		       "document", document,
 		       NULL);
@@ -707,6 +711,9 @@ glide_slide_construct_from_json (GlideSlide *slide, JsonObject *slide_obj, Glide
   GlideAnimationInfo info;
   ClutterColor c;
   
+  g_return_if_fail (GLIDE_IS_SLIDE (slide));
+  g_return_if_fail (GLIDE_IS_STAGE_MANAGER (manager));
+  
   actors_n = json_object_get_member (slide_obj, "actors");
   actors = json_node_get_array (actors_n);
   
@@ -773,6 +780,8 @@ glide_slide_set_background (GlideSlide *slide, const gchar *background)
 {
   gchar *resource, *resource_file;
   
+  g_return_if_fail (GLIDE_IS_SLIDE (slide));
+  
   if (slide->priv->background)
     g_free (slide->priv->background);
   if (slide->priv->background_material)
@@ -809,6 +818,7 @@ glide_slide_set_background (GlideSlide *slide, const gchar *background)
 const gchar *
 glide_slide_get_background (GlideSlide *slide)
 {
+  g_return_val_if_fail (GLIDE_IS_SLIDE (slide), NULL);
   return slide->priv->background;
 }
 
@@ -824,6 +834,7 @@ glide_slide_get_background (GlideSlide *slide)
 void 
 glide_slide_set_animation (GlideSlide *slide, const GlideAnimationInfo *info)
 {
+  g_return_if_fail (GLIDE_IS_SLIDE (slide));
   if (slide->priv->animation)
     glide_animation_info_free (slide->priv->animation);
   
@@ -842,6 +853,7 @@ glide_slide_set_animation (GlideSlide *slide, const GlideAnimationInfo *info)
 GlideAnimationInfo *
 glide_slide_get_animation (GlideSlide *slide)
 {
+  g_return_val_if_fail (GLIDE_IS_SLIDE (slide), NULL);
   return slide->priv->animation;
 }
 
@@ -858,6 +870,7 @@ glide_slide_get_animation (GlideSlide *slide)
 ClutterActor *
 glide_slide_get_contents (GlideSlide *slide)
 {
+  g_return_val_if_fail (GLIDE_IS_SLIDE (slide), NULL);
   return slide->priv->contents_group;
 }
 
@@ -872,6 +885,7 @@ glide_slide_get_contents (GlideSlide *slide)
 void 
 glide_slide_set_color (GlideSlide *slide, const ClutterColor *color)
 {
+  g_return_if_fail (GLIDE_IS_SLIDE (slide));
   slide->priv->color = *color;
   g_object_notify (G_OBJECT (slide), "color");
 
@@ -889,6 +903,7 @@ glide_slide_set_color (GlideSlide *slide, const ClutterColor *color)
 void 
 glide_slide_get_color (GlideSlide *slide, ClutterColor *color)
 {
+  g_return_if_fail (GLIDE_IS_SLIDE (slide));
   *color = slide->priv->color;
 }
 
@@ -907,6 +922,9 @@ glide_slide_resize (GlideSlide *slide, gfloat width, gfloat height)
   GList *a;
   gfloat old_width, old_height, rx, ry;
   
+  g_return_if_fail (GLIDE_IS_SLIDE (slide));
+  g_return_if_fail ((width > 0) && (height > 0));
+  
   clutter_actor_get_size (CLUTTER_ACTOR (slide), &old_width, &old_height);
   
   rx = width/old_width;
@@ -957,6 +975,7 @@ glide_slide_resize (GlideSlide *slide, gfloat width, gfloat height)
 guint 
 glide_slide_get_index (GlideSlide *slide)
 {
+  g_return_val_if_fail (GLIDE_IS_SLIDE (slide), 0);
   return slide->priv->index;
 }
 
@@ -970,6 +989,8 @@ glide_slide_get_index (GlideSlide *slide)
 void
 glide_slide_set_index (GlideSlide *slide, guint index)
 {
+  g_return_if_fail (GLIDE_IS_SLIDE (slide));
+
   slide->priv->index = index;
   g_object_notify (G_OBJECT (slide), "index");
 }