WIP for Get Installed Related Apps

content/public/android/java/src/org/chromium/content/browser/InterfaceRegistrar.java

Index: content/public/android/java/src/org/chromium/content/browser/InterfaceRegistrar.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/InterfaceRegistrar.java b/content/public/android/java/src/org/chromium/content/browser/InterfaceRegistrar.java
new file mode 100644
index 0000000000000000000000000000000000000000..35c1857d549ece8e2e107128e59c391306998240
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+++ b/content/public/android/java/src/org/chromium/content/browser/InterfaceRegistrar.java
@@ -0,0 +1,140 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.content.browser;
+
+import android.app.Activity;
+import android.content.Context;
+
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.base.annotations.JNINamespace;
+import org.chromium.content.browser.InterfaceRegistry.ImplementationFactory;
+import org.chromium.content_public.browser.WebContents;
+import org.chromium.content.browser.installedapp.InstalledAppProviderImpl;
+import org.chromium.device.battery.BatteryMonitorFactory;
+import org.chromium.device.nfc.NfcImpl;
+import org.chromium.device.vibration.VibrationManagerImpl;
+import org.chromium.mojom.content.InstalledAppProvider;
+import org.chromium.mojom.device.BatteryMonitor;
+import org.chromium.mojom.device.VibrationManager;
+import org.chromium.mojom.device.nfc.Nfc;
+import org.chromium.ui.base.WindowAndroid;
+
+/**
+ * Registers interfaces exposed by the browser in the given registry.
+ */
+@JNINamespace("content")
+class InterfaceRegistrar {
+    // BatteryMonitorFactory can't implement ImplementationFactory itself, as we don't depend on
+    // /content in /device. Hence we use BatteryMonitorImplementationFactory as a wrapper.
+    private static class BatteryMonitorImplementationFactory
+            implements ImplementationFactory<BatteryMonitor> {
+        private final BatteryMonitorFactory mFactory;
+
+        BatteryMonitorImplementationFactory(Context applicationContext) {
+            mFactory = new BatteryMonitorFactory(applicationContext);
+        }
+
+        @Override
+        public BatteryMonitor createImpl() {
+            return mFactory.createMonitor();
+        }
+    }
+
+    private static class VibrationManagerImplementationFactory
+            implements ImplementationFactory<VibrationManager> {
+        private final Context mApplicationContext;
+
+        VibrationManagerImplementationFactory(Context applicationContext) {
+            mApplicationContext = applicationContext;
+        }
+
+        @Override
+        public VibrationManager createImpl() {
+            return new VibrationManagerImpl(mApplicationContext);
+        }
+    }
+
+    private static class NfcImplementationFactory implements ImplementationFactory<Nfc> {
+        private final Context mContext;
+        private final WebContents mContents;
+
+        NfcImplementationFactory(Context context, WebContents contents) {
+            mContext = context;
+            mContents = contents;
+        }
+
+        private static class ContextAwareNfcImpl extends NfcImpl implements
+                WindowAndroidChangedObserver {
+            private final ContentViewCore mContextViewCore;
+
+            ContextAwareNfcImpl(Context context, ContentViewCore contextViewCore) {
+                super(context);
+                mContextViewCore = contextViewCore;
+                if (mContextViewCore != null) {
+                    mContextViewCore.addWindowAndroidChangedObserver(this);
+                    if (mContextViewCore.getWindowAndroid() != null) {
+                        setActivity(mContextViewCore.getWindowAndroid().getActivity().get());
+                    }
+                }
+            }
+
+            @Override
+            public void close() {
+                super.close();
+                if (mContextViewCore != null) {
+                    mContextViewCore.removeWindowAndroidChangedObserver(this);
+                }
+            }
+
+            @Override
+            public void onWindowAndroidChanged(WindowAndroid newWindowAndroid) {
+                Activity activity = null;
+                if (newWindowAndroid != null) {
+                    activity = newWindowAndroid.getActivity().get();
+                }
+                setActivity(activity);
+            }
+        }
+
+        @Override
+        public Nfc createImpl() {
+            return new ContextAwareNfcImpl(mContext, ContentViewCore.fromWebContents(mContents));
+        }
+    }
+
+    private static class InstalledAppProviderFactory
+            implements ImplementationFactory<InstalledAppProvider> {
+        private final Context mApplicationContext;
+
+        InstalledAppProviderFactory(Context applicationContext) {
+            mApplicationContext = applicationContext;
+        }
+
+        @Override
+        public InstalledAppProvider createImpl() {
+            return new InstalledAppProviderImpl(mApplicationContext);
+        }
+    }
+
+    @CalledByNative
+    static void exposeInterfacesToRenderer(InterfaceRegistry registry, Context applicationContext) {
+        assert applicationContext != null;
+        registry.addInterface(BatteryMonitor.MANAGER,
+                new BatteryMonitorImplementationFactory(applicationContext));
+        registry.addService(
+                InstalledAppProvider.MANAGER, new InstalledAppProviderFactory(applicationContext));
+    }
+
+    @CalledByNative
+    static void exposeInterfacesToFrame(InterfaceRegistry registry,
+            Context applicationContext, WebContents contents) {
+        assert applicationContext != null;
+        registry.addInterface(VibrationManager.MANAGER,
+                new VibrationManagerImplementationFactory(applicationContext));
+        registry.addInterface(Nfc.MANAGER,
+                new NfcImplementationFactory(applicationContext, contents));
+        // TODO(avayvod): Register the PresentationService implementation here.
+    }
+}