[Chromecast] Turn CastContentWindow into an abstract interface.

chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastShellActivity.java

Index: chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastShellActivity.java
diff --git a/chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastShellActivity.java b/chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastShellActivity.java
deleted file mode 100644
index 311fc4e993f7a6285b569c1af7c522024eb41d56..0000000000000000000000000000000000000000
--- a/chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastShellActivity.java
+++ /dev/null
@@ -1,328 +0,0 @@
-// 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.chromecast.shell;
-
-import android.app.Activity;
-import android.content.BroadcastReceiver;
-import android.content.Context;
-import android.content.Intent;
-import android.content.IntentFilter;
-import android.media.AudioManager;
-import android.net.Uri;
-import android.os.Build;
-import android.os.Bundle;
-import android.support.v4.content.LocalBroadcastManager;
-import android.view.KeyEvent;
-import android.view.MotionEvent;
-import android.view.WindowManager;
-import android.widget.Toast;
-
-import org.chromium.base.Log;
-import org.chromium.content.browser.ContentViewCore;
-import org.chromium.ui.base.WindowAndroid;
-
-/**
- * Activity for managing the Cast shell.
- */
-public class CastShellActivity extends Activity {
-    private static final String TAG = "cr_CastShellActivity";
-    private static final boolean DEBUG = false;
-
-    private static final String ACTIVE_SHELL_URL_KEY = "activeUrl";
-
-    private CastWindowManager mCastWindowManager;
-    private AudioManager mAudioManager;
-    private BroadcastReceiver mBroadcastReceiver;
-    private boolean mReceivedUserLeave = false;
-
-    // Native window instance.
-    // TODO(byungchul, gunsch): CastShellActivity, CastWindowAndroid, and native CastWindowAndroid
-    // have a one-to-one relationship. Consider instantiating CastWindow here and CastWindow having
-    // this native shell instance.
-    private long mNativeCastWindow;
-
-    /**
-     * Returns whether or not CastShellActivity should launch the browser startup sequence.
-     * Intended to be overridden.
-     */
-    protected boolean shouldLaunchBrowser() {
-        return true;
-    }
-
-    /**
-     * Intended to be called from "onStop" to determine if this is a "legitimate" stop or not.
-     * When starting CastShellActivity from the TV in sleep mode, an extra onPause/onStop will be
-     * fired.
-     * Details: http://stackoverflow.com/questions/25369909/
-     * We use onUserLeaveHint to determine if the onPause/onStop called because of user intent.
-     */
-    protected boolean isStopping() {
-        return mReceivedUserLeave;
-    }
-
-    @Override
-    protected void onCreate(final Bundle savedInstanceState) {
-        if (DEBUG) Log.d(TAG, "onCreate");
-        super.onCreate(savedInstanceState);
-        exitIfUrlMissing();
-
-        if (shouldLaunchBrowser()) {
-            if (!CastBrowserHelper.initializeBrowser(getApplicationContext())) {
-                Toast.makeText(this,
-                        R.string.browser_process_initialization_failed,
-                        Toast.LENGTH_SHORT).show();
-                finish();
-            }
-        }
-
-        // Whenever our app is visible, volume controls should modify the music stream.
-        // For more information read:
-        // http://developer.android.com/training/managing-audio/volume-playback.html
-        setVolumeControlStream(AudioManager.STREAM_MUSIC);
-
-        // Set flags to both exit sleep mode when this activity starts and
-        // avoid entering sleep mode while playing media. We cannot distinguish
-        // between video and audio so this applies to both.
-        getWindow().addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
-        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
-
-        mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
-
-        setContentView(R.layout.cast_shell_activity);
-        mCastWindowManager = (CastWindowManager) findViewById(R.id.shell_container);
-        mCastWindowManager.setDelegate(new CastWindowManager.Delegate() {
-                @Override
-                public void onCreated() {
-                }
-
-                @Override
-                public void onClosed() {
-                    mNativeCastWindow = 0;
-                    mCastWindowManager.setDelegate(null);
-                    finish();
-                }
-            });
-        mCastWindowManager.setWindow(new WindowAndroid(this));
-
-        registerBroadcastReceiver();
-
-        String url = getIntent().getDataString();
-        Log.d(TAG, "onCreate startupUrl: %s", url);
-        mNativeCastWindow = mCastWindowManager.launchCastWindow(url);
-    }
-
-    @Override
-    protected void onDestroy() {
-        if (DEBUG) Log.d(TAG, "onDestroy");
-
-        unregisterBroadcastReceiver();
-
-        if (mNativeCastWindow != 0) {
-            mCastWindowManager.stopCastWindow(mNativeCastWindow, false /* gracefully */);
-            mNativeCastWindow = 0;
-        }
-
-        super.onDestroy();
-    }
-
-    @Override
-    protected void onNewIntent(Intent intent) {
-        if (DEBUG) Log.d(TAG, "onNewIntent");
-        // Only handle direct intents (e.g. "fling") if this activity is also managing
-        // the browser process.
-        if (!shouldLaunchBrowser()) return;
-
-        String url = intent.getDataString();
-        Log.d(TAG, "onNewIntent: %s", url);
-
-        // Reset broadcast intent uri and receiver.
-        setIntent(intent);
-        exitIfUrlMissing();
-        getActiveCastWindow().loadUrl(url);
-    }
-
-    @Override
-    protected void onStart() {
-        if (DEBUG) Log.d(TAG, "onStart");
-        super.onStart();
-    }
-
-    @Override
-    protected void onStop() {
-        if (DEBUG) Log.d(TAG, "onStop, window focus = %d", hasWindowFocus());
-
-        if (isStopping()) {
-            // As soon as the cast app is no longer in the foreground, we ought to immediately tear
-            // everything down.
-            finishGracefully();
-
-            // On pre-M devices, the device should be "unmuted" at the end of a Cast application
-            // session, signaled by the activity exiting. See b/19964892.
-            if (Build.VERSION.SDK_INT < 23) {
-                releaseStreamMuteIfNecessary();
-            }
-        }
-
-        super.onStop();
-    }
-
-    @Override
-    protected void onResume() {
-        if (DEBUG) Log.d(TAG, "onResume");
-        super.onResume();
-
-        // Inform ContentView that this activity is being shown.
-        ContentViewCore view = getActiveContentViewCore();
-        if (view != null) view.onShow();
-
-        // Request audio focus so any other audio playback doesn't continue in the background.
-        if (mAudioManager.requestAudioFocus(
-                null, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN)
-                != AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
-            Log.e(TAG, "Failed to obtain audio focus");
-        }
-    }
-
-    @Override
-    protected void onPause() {
-        if (DEBUG) Log.d(TAG, "onPause");
-
-        // Release the audio focus. Note that releasing audio focus does not stop audio playback,
-        // it just notifies the framework that this activity has stopped playing audio.
-        if (mAudioManager.abandonAudioFocus(null) != AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
-            Log.e(TAG, "Failed to abandon audio focus");
-        }
-
-        ContentViewCore view = getActiveContentViewCore();
-        if (view != null) view.onHide();
-
-        super.onPause();
-    }
-
-    @Override
-    protected void onUserLeaveHint() {
-        if (DEBUG) Log.d(TAG, "onUserLeaveHint");
-        mReceivedUserLeave = true;
-    }
-
-    protected void finishGracefully() {
-        if (mNativeCastWindow != 0) {
-            mCastWindowManager.stopCastWindow(mNativeCastWindow, true /* gracefully */);
-            mNativeCastWindow = 0;
-        }
-    }
-
-    @SuppressWarnings("deprecation")
-    private void releaseStreamMuteIfNecessary() {
-        AudioManager audioManager = CastAudioManager.getAudioManager(this);
-        boolean isMuted = false;
-        try {
-            isMuted = (Boolean) audioManager.getClass().getMethod("isStreamMute", int.class)
-                    .invoke(audioManager, AudioManager.STREAM_MUSIC);
-        } catch (Exception e) {
-            Log.e(TAG, "Cannot call AudioManager.isStreamMute().", e);
-        }
-
-        if (isMuted) {
-            // Note: this is a no-op on fixed-volume devices.
-            audioManager.setStreamMute(AudioManager.STREAM_MUSIC, false);
-        }
-    }
-
-    private void registerBroadcastReceiver() {
-        if (mBroadcastReceiver == null) {
-            mBroadcastReceiver = new BroadcastReceiver() {
-                @Override
-                public void onReceive(Context context, Intent intent) {
-                    Log.d(TAG, "Received intent: action=%s", intent.getAction());
-                    if (CastWindowAndroid.ACTION_ENABLE_DEV_TOOLS.equals(intent.getAction())) {
-                        mCastWindowManager.nativeEnableDevTools(true);
-                    } else if (CastWindowAndroid.ACTION_DISABLE_DEV_TOOLS.equals(
-                            intent.getAction())) {
-                        mCastWindowManager.nativeEnableDevTools(false);
-                    }
-                }
-            };
-        }
-
-        IntentFilter devtoolsBroadcastIntentFilter = new IntentFilter();
-        devtoolsBroadcastIntentFilter.addAction(CastWindowAndroid.ACTION_ENABLE_DEV_TOOLS);
-        devtoolsBroadcastIntentFilter.addAction(CastWindowAndroid.ACTION_DISABLE_DEV_TOOLS);
-        LocalBroadcastManager.getInstance(this)
-                .registerReceiver(mBroadcastReceiver, devtoolsBroadcastIntentFilter);
-    }
-
-    private void unregisterBroadcastReceiver() {
-        LocalBroadcastManager broadcastManager = LocalBroadcastManager.getInstance(this);
-        broadcastManager.unregisterReceiver(mBroadcastReceiver);
-    }
-
-    private void exitIfUrlMissing() {
-        Intent intent = getIntent();
-        if (intent != null && intent.getData() != null && !intent.getData().equals(Uri.EMPTY)) {
-            return;
-        }
-        // Log an exception so that the exit cause is obvious when reading the logs.
-        Log.e(TAG, "Activity will not start",
-                new IllegalArgumentException("Intent did not contain a valid url"));
-        System.exit(-1);
-    }
-
-    /**
-     * @return The currently visible {@link CastWindowAndroid} or null if one is not showing.
-     */
-    public CastWindowAndroid getActiveCastWindow() {
-        return mCastWindowManager.getActiveCastWindow();
-    }
-
-    /**
-     * @return The {@link ContentViewCore} owned by the currently visible {@link CastWindowAndroid},
-     *         or null if one is not showing.
-     */
-    public ContentViewCore getActiveContentViewCore() {
-        CastWindowAndroid shell = getActiveCastWindow();
-        return shell != null ? shell.getContentViewCore() : null;
-    }
-
-    @Override
-    public boolean onKeyUp(int keyCode, KeyEvent event) {
-        if (keyCode != KeyEvent.KEYCODE_BACK) {
-            return super.onKeyUp(keyCode, event);
-        }
-
-        // Just finish this activity to go back to the previous activity or launcher.
-        finishGracefully();
-        return true;
-    }
-
-    @Override
-    public boolean dispatchKeyEvent(KeyEvent event) {
-        int keyCode = event.getKeyCode();
-        if (keyCode == KeyEvent.KEYCODE_BACK) {
-            return super.dispatchKeyEvent(event);
-        }
-        return false;
-    }
-
-    @Override
-    public boolean dispatchGenericMotionEvent(MotionEvent ev) {
-        return false;
-    }
-
-    @Override
-    public boolean dispatchKeyShortcutEvent(KeyEvent event) {
-        return false;
-    }
-
-    @Override
-    public boolean dispatchTouchEvent(MotionEvent ev) {
-        return false;
-    }
-
-    @Override
-    public boolean dispatchTrackballEvent(MotionEvent ev) {
-        return false;
-    }
-}