Add two features our multi-locale yohoho is going to need:

- Ability to set a locale prefix in which to search for locale-specific images.
- Ability to clear the image cache (we want to do this when we switch locales, otherwise we end up with wrong-language images cached.)


git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@83 ed5b42cb-e716-0410-a449-f6a68f950b19

src/java/com/threerings/resource/ResourceManager.java

@@ -193,6 +193,14 @@ public class ResourceManager
         }
     }
 
+    /**
+     * Set where we should look for locale-specific resources.
+     */
+    public void setLocalePrefix (String prefix)
+    {
+        _localePrefix = prefix;
+    }
+
     /**
      * Initializes the bundle sets to be made available by this resource
      * manager.  Applications that wish to make use of resource bundles
@@ -419,6 +427,23 @@ public class ResourceManager
         }
 
         // if we still didn't find anything, try the classloader
+
+        // First try a locale-specific file
+        if (_localePrefix != null) {
+            final String rpath = PathUtil.appendPath(_rootPath,
+                PathUtil.appendPath(_localePrefix, path));
+            in = (InputStream)AccessController.doPrivileged(
+                new PrivilegedAction() {
+                    public Object run () {
+                        return _loader.getResourceAsStream(rpath);
+                    }
+                });
+            if (in != null) {
+                return in;
+            }
+        }
+
+        // But if we didn't find that, try locale-neutral.
         final String rpath = PathUtil.appendPath(_rootPath, path);
         in = (InputStream)AccessController.doPrivileged(new PrivilegedAction() {
             public Object run () {
@@ -462,6 +487,22 @@ public class ResourceManager
             return new FileImageInputStream(file);
         }
 
+        // First try a locale-specific file
+        if (_localePrefix != null) {
+            final String rpath = PathUtil.appendPath(_rootPath,
+                PathUtil.appendPath(_localePrefix, path));
+            InputStream in = (InputStream)AccessController.doPrivileged(
+                new PrivilegedAction() {
+                    public Object run () {
+                        return _loader.getResourceAsStream(rpath);
+                    }
+                });
+            if (in != null) {
+                return new MemoryCacheImageInputStream(
+                    new BufferedInputStream(in));
+            }
+        }
+
         // if we still didn't find anything, try the classloader
         final String rpath = PathUtil.appendPath(_rootPath, path);
         InputStream in = (InputStream)
@@ -686,6 +727,9 @@ public class ResourceManager
     /** A table of our resource sets. */
     protected HashMap _sets = new HashMap();
 
+    /** Locale to search for locale-specific resources, if any. */
+    protected String _localePrefix = null;
+
     /** The prefix of configuration entries that describe a resource
      * set. */
     protected static final String RESOURCE_SET_PREFIX = "resource.set.";