content/shell/android/shell_apk/src/org/chromium/content_shell_apk/ContentShellActivity.java

// Copyright (c) 2012 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_shell_apk;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.KeyEvent;

import org.chromium.base.ChromiumActivity;
import org.chromium.base.MemoryPressureListener;
import org.chromium.content.app.LibraryLoader;
import org.chromium.content.browser.ActivityContentVideoViewClient;
import org.chromium.content.browser.AndroidBrowserProcess;
import org.chromium.content.browser.BrowserStartupConfig;
import org.chromium.content.browser.ContentVideoViewClient;
import org.chromium.content.browser.ContentView;
import org.chromium.content.browser.ContentViewClient;
import org.chromium.content.browser.DeviceUtils;
import org.chromium.content.browser.TracingIntentHandler;
import org.chromium.content.common.CommandLine;
import org.chromium.content.common.ProcessInitException;
import org.chromium.content_shell.Shell;
import org.chromium.content_shell.ShellManager;
import org.chromium.ui.WindowAndroid;

/**
 * Activity for managing the Content Shell.
 */
public class ContentShellActivity extends ChromiumActivity {

    public static final String COMMAND_LINE_FILE = "/data/local/tmp/content-shell-command-line";
    private static final String TAG = "ContentShellActivity";

    private static final String ACTIVE_SHELL_URL_KEY = "activeUrl";
    private static final String ACTION_START_TRACE =
            "org.chromium.content_shell.action.PROFILE_START";
    private static final String ACTION_STOP_TRACE =
            "org.chromium.content_shell.action.PROFILE_STOP";
    public static final String COMMAND_LINE_ARGS_KEY = "commandLineArgs";

    /**
     * Sending an intent with this action will simulate a memory pressure signal
     * at a critical level.
     */
    private static final String ACTION_LOW_MEMORY =
            "org.chromium.content_shell.action.ACTION_LOW_MEMORY";

    /**
     * Sending an intent with this action will simulate a memory pressure signal
     * at a moderate level.
     */
    private static final String ACTION_TRIM_MEMORY_MODERATE =
            "org.chromium.content_shell.action.ACTION_TRIM_MEMORY_MODERATE";


    private ShellManager mShellManager;
    private WindowAndroid mWindowAndroid;
    private BroadcastReceiver mReceiver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Initializing the command line must occur before loading the library.
        if (!CommandLine.isInitialized()) {
            CommandLine.initFromFile(COMMAND_LINE_FILE);
            String[] commandLineParams = getCommandLineParamsFromIntent(getIntent());
            if (commandLineParams != null) {
                CommandLine.getInstance().appendSwitchesAndArguments(commandLineParams);
            }
        }
        waitForDebuggerIfNeeded();

        DeviceUtils.addDeviceSpecificUserAgentSwitch(this);
        try {
            LibraryLoader.ensureInitialized();

            setContentView(R.layout.content_shell_activity);
            mShellManager = (ShellManager) findViewById(R.id.shell_container);
            mWindowAndroid = new WindowAndroid(this);
            mWindowAndroid.restoreInstanceState(savedInstanceState);
            mShellManager.setWindow(mWindowAndroid);

            String startupUrl = getUrlFromIntent(getIntent());
            if (!TextUtils.isEmpty(startupUrl)) {
                mShellManager.setStartupUrl(Shell.sanitizeUrl(startupUrl));
            }

            if (!CommandLine.getInstance().hasSwitch(CommandLine.DUMP_RENDER_TREE)) {
                BrowserStartupConfig.setAsync(new BrowserStartupConfig.StartupCallback() {

                    @Override
                    public void run(int startupResult) {
                        if (startupResult > 0) {
                            // TODO: Show error message.
                            Log.e(TAG, "ContentView initialization failed.");
                            finish();
                        } else {
                            finishInitialization();
                        }
                    }
                });
            }

            if (!AndroidBrowserProcess.init(this, AndroidBrowserProcess.MAX_RENDERERS_LIMIT)) {
                String shellUrl = ShellManager.DEFAULT_SHELL_URL;
                if (savedInstanceState != null
                        && savedInstanceState.containsKey(ACTIVE_SHELL_URL_KEY)) {
                    shellUrl = savedInstanceState.getString(ACTIVE_SHELL_URL_KEY);
                }
                mShellManager.launchShell(shellUrl);
                finishInitialization();
            }
        } catch (ProcessInitException e) {
            Log.e(TAG, "ContentView initialization failed.", e);
            finish();
        }
    }

    private void finishInitialization() {
        getActiveContentView().setContentViewClient(new ContentViewClient() {
            @Override
            public ContentVideoViewClient getContentVideoViewClient() {
                return new ActivityContentVideoViewClient(ContentShellActivity.this);
            }
        });
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        Shell activeShell = getActiveShell();
        if (activeShell != null) {
            outState.putString(ACTIVE_SHELL_URL_KEY, activeShell.getContentView().getUrl());
        }

        mWindowAndroid.saveInstanceState(outState);
    }

    private void waitForDebuggerIfNeeded() {
        if (CommandLine.getInstance().hasSwitch(CommandLine.WAIT_FOR_JAVA_DEBUGGER)) {
            Log.e(TAG, "Waiting for Java debugger to connect...");
            android.os.Debug.waitForDebugger();
            Log.e(TAG, "Java debugger connected. Resuming execution.");
        }
    }

    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        if (keyCode != KeyEvent.KEYCODE_BACK) return super.onKeyUp(keyCode, event);

        Shell activeView = getActiveShell();
        if (activeView != null && activeView.getContentView().canGoBack()) {
            activeView.getContentView().goBack();
            return true;
        }

        return super.onKeyUp(keyCode, event);
    }

    @Override
    protected void onNewIntent(Intent intent) {
        if (getCommandLineParamsFromIntent(intent) != null) {
            Log.i(TAG, "Ignoring command line params: can only be set when creating the activity.");
        }

        if (ACTION_LOW_MEMORY.equals(intent.getAction())) {
            MemoryPressureListener.simulateMemoryPressureSignal(TRIM_MEMORY_COMPLETE);
            return;
        } else if (ACTION_TRIM_MEMORY_MODERATE.equals(intent.getAction())) {
            MemoryPressureListener.simulateMemoryPressureSignal(TRIM_MEMORY_MODERATE);
            return;
        }

        String url = getUrlFromIntent(intent);
        if (!TextUtils.isEmpty(url)) {
            Shell activeView = getActiveShell();
            if (activeView != null) {
                activeView.loadUrl(url);
            }
        }
    }

    @Override
    protected void onPause() {
        ContentView view = getActiveContentView();
        if (view != null) view.onActivityPause();

        super.onPause();
        unregisterReceiver(mReceiver);
    }

    @Override
    protected void onResume() {
        super.onResume();

        ContentView view = getActiveContentView();
        if (view != null) view.onActivityResume();
        IntentFilter intentFilter = new IntentFilter(ACTION_START_TRACE);
        intentFilter.addAction(ACTION_STOP_TRACE);
        mReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                String action = intent.getAction();
                String extra = intent.getStringExtra("file");
                if (ACTION_START_TRACE.equals(action)) {
                    if (extra.isEmpty()) {
                        Log.e(TAG, "Can not start tracing without specifing saving location");
                    } else {
                        TracingIntentHandler.beginTracing(extra);
                        Log.i(TAG, "start tracing");
                    }
                } else if (ACTION_STOP_TRACE.equals(action)) {
                    Log.i(TAG, "stop tracing");
                    TracingIntentHandler.endTracing();
                }
            }
        };
        registerReceiver(mReceiver, intentFilter);
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        mWindowAndroid.onActivityResult(requestCode, resultCode, data);
    }

    private static String getUrlFromIntent(Intent intent) {
        return intent != null ? intent.getDataString() : null;
    }

    private static String[] getCommandLineParamsFromIntent(Intent intent) {
        return intent != null ? intent.getStringArrayExtra(COMMAND_LINE_ARGS_KEY) : null;
    }

    /**
     * @return The {@link ShellManager} configured for the activity or null if it has not been
     *         created yet.
     */
    public ShellManager getShellManager() {
        return mShellManager;
    }

    /**
     * @return The currently visible {@link Shell} or null if one is not showing.
     */
    public Shell getActiveShell() {
        return mShellManager != null ? mShellManager.getActiveShell() : null;
    }

    /**
     * @return The {@link ContentView} owned by the currently visible {@link Shell} or null if one
     *         is not showing.
     */
    public ContentView getActiveContentView() {
        Shell shell = getActiveShell();
        return shell != null ? shell.getContentView() : null;
    }
}