1 files changed, 106 insertions, 0 deletions
diff --git a/chromium/java/com/android/webview/chromium/ResourcesContextWrapperFactory.java b/chromium/java/com/android/webview/chromium/ResourcesContextWrapperFactory.java
new file mode 100644
index 0000000..da4174f
--- /dev/null
+++ b/chromium/java/com/android/webview/chromium/ResourcesContextWrapperFactory.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2014 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.webview.chromium;
+
+import android.content.ComponentCallbacks;
+import android.content.Context;
+import android.content.ContextWrapper;
+import android.content.res.AssetManager;
+import android.content.res.Resources;
+import android.view.LayoutInflater;
+
+import java.util.WeakHashMap;
+
+/**
+ * This class allows us to wrap the application context so that the WebView implementation can
+ * correctly reference both org.chromium.* and application classes which is necessary to properly
+ * inflate UI.  We keep a weak map from contexts to wrapped contexts to avoid constantly re-wrapping
+ * or doubly wrapping contexts.
+ */
+public class ResourcesContextWrapperFactory {
+    private static WeakHashMap<Context,ContextWrapper> sCtxToWrapper
+            = new WeakHashMap<Context,ContextWrapper>();
+    private static final Object sLock = new Object();
+
+    private ResourcesContextWrapperFactory() {
+    }
+
+    public static Context get(Context ctx) {
+        ContextWrapper wrappedCtx;
+        synchronized (sLock) {
+            wrappedCtx = sCtxToWrapper.get(ctx);
+            if (wrappedCtx == null) {
+                wrappedCtx = createWrapper(ctx);
+                sCtxToWrapper.put(ctx, wrappedCtx);
+            }
+        }
+        return wrappedCtx;
+    }
+
+    private static ContextWrapper createWrapper(final Context ctx) {
+        return new ContextWrapper(ctx) {
+            private Context applicationContext;
+
+            @Override
+            public ClassLoader getClassLoader() {
+                final ClassLoader appCl = getBaseContext().getClassLoader();
+                final ClassLoader webViewCl = this.getClass().getClassLoader();
+                return new ClassLoader() {
+                    @Override
+                    protected Class<?> findClass(String name) throws ClassNotFoundException {
+                        // First look in the WebViewProvider class loader.
+                        try {
+                            return webViewCl.loadClass(name);
+                        } catch (ClassNotFoundException e) {
+                            // Look in the app class loader; allowing it to throw ClassNotFoundException.
+                            return appCl.loadClass(name);
+                        }
+                    }
+                };
+            }
+
+            @Override
+            public Object getSystemService(String name) {
+                if (Context.LAYOUT_INFLATER_SERVICE.equals(name)) {
+                    LayoutInflater i = (LayoutInflater) getBaseContext().getSystemService(name);
+                    return i.cloneInContext(this);
+                } else {
+                    return getBaseContext().getSystemService(name);
+                }
+            }
+
+            @Override
+            public Context getApplicationContext() {
+                if (applicationContext == null)
+                    applicationContext = get(ctx.getApplicationContext());
+                return applicationContext;
+            }
+
+            @Override
+            public void registerComponentCallbacks(ComponentCallbacks callback) {
+                // We have to override registerComponentCallbacks and unregisterComponentCallbacks
+                // since they call getApplicationContext().[un]registerComponentCallbacks()
+                // which causes us to go into a loop.
+                ctx.registerComponentCallbacks(callback);
+            }
+
+            @Override
+            public void unregisterComponentCallbacks(ComponentCallbacks callback) {
+                ctx.unregisterComponentCallbacks(callback);
+            }
+        };
+    }
+}