Create a ScreenNail interface so we can add other types of screenails.

Add a new MediaItem type to contain a ScreenNail.

Change-Id: Ia303949f3013dd48ded204eaf9ec69a102b8503e

1 files changed, 74 insertions, 0 deletions

diff --git a/src/com/android/gallery3d/data/SnailSource.java b/src/com/android/gallery3d/data/SnailSource.java
new file mode 100644
index 000000000..17b899dba
--- /dev/null
+++ b/src/com/android/gallery3d/data/SnailSource.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.gallery3d.data;
+
+import android.util.SparseArray;
+import com.android.gallery3d.app.GalleryApp;
+import com.android.gallery3d.ui.ScreenNail;
+
+public class SnailSource extends MediaSource {
+    private static final String TAG = "SnailSource";
+    private static final int SNAIL_ALBUM = 0;
+    private static final int SNAIL_ITEM = 1;
+
+    private GalleryApp mApplication;
+    private PathMatcher mMatcher;
+    private static int sNextId;
+    private static SparseArray<ScreenNail> sRegistry = new SparseArray<ScreenNail>();
+
+    public SnailSource(GalleryApp application) {
+        super("snail");
+        mApplication = application;
+        mMatcher = new PathMatcher();
+        mMatcher.add("/snail/set/*", SNAIL_ALBUM);
+        mMatcher.add("/snail/item/*", SNAIL_ITEM);
+    }
+
+    // The only path we accept is "/snail/set/id" and "/snail/item/id"
+    @Override
+    public MediaObject createMediaObject(Path path) {
+        DataManager dataManager = mApplication.getDataManager();
+        switch (mMatcher.match(path)) {
+            case SNAIL_ALBUM:
+                String itemPath = "/snail/item/" + mMatcher.getVar(0);
+                MediaItem item =
+                        (MediaItem) dataManager.getMediaObject(itemPath);
+                return new SnailAlbum(path, item);
+            case SNAIL_ITEM: {
+                int id = mMatcher.getIntVar(0);
+                return new SnailItem(path, lookupScreenNail(id));
+            }
+        }
+        return null;
+    }
+
+    // Register a ScreenNail. Returns the Path of the MediaSet
+    // containing the MediaItem associated with the ScreenNail.
+    public static synchronized Path registerScreenNail(ScreenNail s) {
+        int id = sNextId++;
+        sRegistry.put(id, s);
+        return Path.fromString("/snail/set").getChild(id);
+    }
+
+    public static synchronized void unregisterScreenNail(ScreenNail s) {
+        int index = sRegistry.indexOfValue(s);
+        sRegistry.removeAt(index);
+    }
+
+    private static synchronized ScreenNail lookupScreenNail(int id) {
+        return sRegistry.get(id);
+    }
+}