Bug 1182514 - Add Lightweight theme for restricted profiles. r=margaret

--HG--
extra : commitid : 5oxYhEqVgGY
extra : amend_source : 8caa50a3d30dc2e377611d87f906a08d85e71d30

mobile/android/base/lwt/LightweightTheme.java

@@ -5,6 +5,8 @@
 
 package org.mozilla.gecko.lwt;
 
+import java.io.IOException;
+import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -21,6 +23,7 @@ import org.mozilla.gecko.util.ThreadUtils.AssertBehavior;
 import android.app.Application;
 import android.content.SharedPreferences;
 import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
@@ -40,6 +43,8 @@ public class LightweightTheme implements GeckoEventListener {
     private static final String PREFS_URL = "lightweightTheme.headerURL";
     private static final String PREFS_COLOR = "lightweightTheme.color";
 
+    private static final String ASSETS_PREFIX = "resource://android/assets/";
+
     private final Application mApplication;
 
     private Bitmap mBitmap;
@@ -119,8 +124,31 @@ public class LightweightTheme implements GeckoEventListener {
                 croppedURL = croppedURL.substring(0, mark);
             }
 
-            // Get the image and convert it to a bitmap.
-            final Bitmap bitmap = BitmapUtils.decodeUrl(croppedURL);
+            if (croppedURL.startsWith(ASSETS_PREFIX)) {
+                onBitmapLoaded(loadFromAssets(croppedURL));
+            } else {
+                onBitmapLoaded(BitmapUtils.decodeUrl(croppedURL));
+            }
+        }
+
+        private Bitmap loadFromAssets(String url) {
+            InputStream stream = null;
+
+            try {
+                stream = mApplication.getAssets().open(url.substring(ASSETS_PREFIX.length()));
+                return BitmapFactory.decodeStream(stream);
+            } catch (IOException e) {
+                return null;
+            } finally {
+                if (stream != null) {
+                    try {
+                        stream.close();
+                    } catch (IOException e) {}
+                }
+            }
+        }
+
+        private void onBitmapLoaded(final Bitmap bitmap) {
             ThreadUtils.postToUiThread(new Runnable() {
                 @Override
                 public void run() {

mobile/android/chrome/content/browser.js

@@ -3083,6 +3083,10 @@ var LightWeightThemeWebInstaller = {
     BrowserApp.deck.addEventListener("InstallBrowserTheme", this, false, true);
     BrowserApp.deck.addEventListener("PreviewBrowserTheme", this, false, true);
     BrowserApp.deck.addEventListener("ResetBrowserThemePreview", this, false, true);
+
+    if (ParentalControls.parentalControlsEnabled && !this._manager.currentTheme) {
+      this._installParentalControlsTheme();
+    }
   },
 
   handleEvent: function (event) {
@@ -3119,6 +3123,18 @@ var LightWeightThemeWebInstaller = {
     return this._manager = temp.LightweightThemeManager;
   },
 
+  _installParentalControlsTheme: function() {
+    let mgr = this._manager;
+    let parentalControlsTheme = {
+      "headerURL": "resource://android/assets/parental_controls_theme.png",
+      "name": "Parental Controls Theme",
+      "id": "parental-controls-theme@mozilla.org"
+    };
+
+    mgr.addBuiltInTheme(parentalControlsTheme);
+    mgr.themeChanged(parentalControlsTheme);
+  },
+
   _installRequest: function (event) {
     let node = event.target;
     let data = this._getThemeFromNode(node);