Handle theme changes

Change-Id: Ib933df8ef825ac35dfcf3207be5f803c2da18f56

3 files changed, 59 insertions, 1 deletions

diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 066c1779c..5898071d3 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -197,6 +197,12 @@
             </intent-filter>
         </receiver>
 
+        <receiver android:name="com.android.launcher3.ThemeChangedReceiver" >
+            <intent-filter>
+                <action android:name="org.cyanogenmod.intent.action.THEME_CHANGED"/>
+            </intent-filter>
+        </receiver>
+
         <!-- The settings provider contains Home's data, like the workspace favorites -->
         <provider
             android:name="com.android.launcher3.LauncherProvider"
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 8a0fe6c05..18be75d6e 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -514,7 +514,7 @@ public class Launcher extends Activity
         }
     }
 
-    private void initializeDynamicGrid() {
+    void initializeDynamicGrid() {
         LauncherAppState.setApplicationContext(getApplicationContext());
         LauncherAppState app = LauncherAppState.getInstance();
 
diff --git a/src/com/android/launcher3/ThemeChangedReceiver.java b/src/com/android/launcher3/ThemeChangedReceiver.java
new file mode 100644
index 000000000..134a28559
--- /dev/null
+++ b/src/com/android/launcher3/ThemeChangedReceiver.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2014 The CyanogenMod 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.launcher3;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+public class ThemeChangedReceiver extends BroadcastReceiver {
+    private static final String EXTRA_COMPONENTS = "components";
+
+    public static final String MODIFIES_ICONS = "mods_icons";
+    public static final String MODIFIES_FONTS = "mods_fonts";
+    public static final String MODIFIES_OVERLAYS = "mods_overlays";
+
+    public void onReceive(Context context, Intent intent) {
+        // components is a '|' delimited string of the components that changed
+        // due to a theme change.
+        String components = intent.getStringExtra(EXTRA_COMPONENTS);
+        if (components != null) {
+            LauncherAppState.setApplicationContext(context.getApplicationContext());
+            LauncherAppState app = LauncherAppState.getInstance();
+            if (isInterestingThemeChange(components)) {
+                app.getIconCache().flush();
+                app.getModel().forceReload();
+            }
+        }
+    }
+
+    /**
+     * We consider this an "interesting" theme change if it modifies icons, overlays, or fonts.
+     * @param components
+     * @return
+     */
+    private boolean isInterestingThemeChange(String components) {
+        return components.contains(MODIFIES_ICONS) || components.contains(MODIFIES_FONTS) ||
+                components.contains(MODIFIES_OVERLAYS);
+    }
+}