From dc9ad8df8074cac9181a00699188809d05737d8e Mon Sep 17 00:00:00 2001
From: =?utf8?q?Florian=20M=C3=BCllner?= <fmuellner@gnome.org>
Date: Fri, 21 Sep 2012 16:00:44 +0200
Subject: [PATCH] st-texture-cache: Add API to remove cache data

The current API assumes that image data loaded from files remains
valid during the life time of the shell. This assumption is mostly
valid for image files we provide ourselves (with the exception being
designers working on those files), but not necessarily for "external"
files - provide API to explicitly remove cached data associated with
a URI for those cases.

https://bugzilla.gnome.org/show_bug.cgi?id=679268
---
 src/st/st-texture-cache.c | 27 +++++++++++++++++++++++++++
 src/st/st-texture-cache.h |  3 +++
 2 files changed, 30 insertions(+)

diff --git a/src/st/st-texture-cache.c b/src/st/st-texture-cache.c
index f76543e65..211143254 100644
--- a/src/st/st-texture-cache.c
+++ b/src/st/st-texture-cache.c
@@ -94,6 +94,33 @@ st_texture_cache_class_init (StTextureCacheClass *klass)
                   G_TYPE_NONE, 0);
 }
 
+/**
+ * st_texture_cache_clear_uri:
+ * @cache: A #StTextureCache
+ * @uri: URI of cached object
+ *
+ * If the given @uri is known to have been modified
+ * externally, this function may be used to invalidate
+ * the in-memory cache.
+ */
+void
+st_texture_cache_clear_uri (StTextureCache *cache,
+                            const char     *uri)
+{
+  char *key;
+
+  g_return_if_fail (ST_IS_TEXTURE_CACHE (cache));
+  g_return_if_fail (uri != NULL);
+
+  key = g_strconcat (CACHE_PREFIX_URI, uri, NULL);
+  g_hash_table_remove (cache->priv->keyed_cache, key);
+  g_free (key);
+
+  key = g_strconcat (CACHE_PREFIX_URI_FOR_CAIRO, uri, NULL);
+  g_hash_table_remove (cache->priv->keyed_cache, key);
+  g_free (key);
+}
+
 /* Evicts all cached textures for named icons */
 static void
 st_texture_cache_evict_icons (StTextureCache *cache)
diff --git a/src/st/st-texture-cache.h b/src/st/st-texture-cache.h
index fc7dac294..b5c563b84 100644
--- a/src/st/st-texture-cache.h
+++ b/src/st/st-texture-cache.h
@@ -68,6 +68,9 @@ GType st_texture_cache_get_type (void) G_GNUC_CONST;
 
 StTextureCache* st_texture_cache_get_default (void);
 
+void st_texture_cache_clear_uri (StTextureCache *cache,
+                                 const gchar    *uri);
+
 ClutterActor *
 st_texture_cache_load_sliced_image (StTextureCache    *cache,
                                     const gchar       *path,
-- 
2.39.5