org.chromium.content.browser.ChildProcessLauncher Java Examples

/**
 * Called when a top-level Chrome activity (ChromeTabbedActivity, FullscreenActivity) is
 * started in foreground. It will not be called again when other Chrome activities take over
 * (see onStart()), that is, when correct activity calls startActivity() for another Chrome
 * activity.
 */
private void onForegroundSessionStart() {
    ChildProcessLauncher.onBroughtToForeground();
    mBackgroundProcessing.startTimers();
    updatePasswordEchoState();
    FontSizePrefs.getInstance(this).onSystemFontScaleChanged();
    updateAcceptLanguages();
    mVariationsSession.start(getApplicationContext());
    mPowerBroadcastReceiver.onForegroundSessionStart();

    // Track the ratio of Chrome startups that are caused by notification clicks.
    // TODO(johnme): Add other reasons (and switch to recordEnumeratedHistogram).
    RecordHistogram.recordBooleanHistogram(
            "Startup.BringToForegroundReason",
            NotificationPlatformBridge.wasNotificationRecentlyClicked());
}
 

/** Warmup activities that should only happen once. */
@SuppressFBWarnings("DM_EXIT")
private static void initializeBrowser(final Application app) {
    ThreadUtils.assertOnUiThread();
    try {
        ChromeBrowserInitializer.getInstance(app).handleSynchronousStartup();
    } catch (ProcessInitException e) {
        Log.e(TAG, "ProcessInitException while starting the browser process.");
        // Cannot do anything without the native library, and cannot show a
        // dialog to the user.
        System.exit(-1);
    }
    final Context context = app.getApplicationContext();
    final ChromeApplication chrome = (ChromeApplication) context;
    ChildProcessCreationParams.set(chrome.getChildProcessCreationParams());
    new AsyncTask<Void, Void, Void>() {
        @Override
        protected Void doInBackground(Void... params) {
            ChildProcessLauncher.warmUp(context);
            return null;
        }
    }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
    ChromeBrowserInitializer.initNetworkChangeNotifier(context);
    WarmupManager.getInstance().initializeViewHierarchy(
            context, R.layout.custom_tabs_control_container);
}
 

/** Warmup activities that should only happen once. */
@SuppressFBWarnings("DM_EXIT")
private static void initializeBrowser(final Application app) {
    ThreadUtils.assertOnUiThread();
    try {
        ChromeBrowserInitializer.getInstance(app).handleSynchronousStartup();
    } catch (ProcessInitException e) {
        Log.e(TAG, "ProcessInitException while starting the browser process.");
        // Cannot do anything without the native library, and cannot show a
        // dialog to the user.
        System.exit(-1);
    }
    final Context context = app.getApplicationContext();
    final ChromeApplication chrome = (ChromeApplication) context;
    ChildProcessCreationParams.set(chrome.getChildProcessCreationParams());
    new AsyncTask<Void, Void, Void>() {
        @Override
        protected Void doInBackground(Void... params) {
            ChildProcessLauncher.warmUp(context);
            return null;
        }
    }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
    ChromeBrowserInitializer.initNetworkChangeNotifier(context);
    WarmupManager.getInstance().initializeViewHierarchy(
            context, R.layout.custom_tabs_control_container, R.layout.custom_tabs_toolbar);
}
 

/**
 * Called when a top-level Chrome activity (ChromeTabbedActivity, FullscreenActivity) is
 * started in foreground. It will not be called again when other Chrome activities take over
 * (see onStart()), that is, when correct activity calls startActivity() for another Chrome
 * activity.
 */
private void onForegroundSessionStart() {
    UmaUtils.recordForegroundStartTime();
    ChildProcessLauncher.onBroughtToForeground();
    updatePasswordEchoState();
    FontSizePrefs.getInstance(mApplication).onSystemFontScaleChanged();
    updateAcceptLanguages();
    mVariationsSession.start(mApplication);
    mPowerBroadcastReceiver.onForegroundSessionStart();

    // Track the ratio of Chrome startups that are caused by notification clicks.
    // TODO(johnme): Add other reasons (and switch to recordEnumeratedHistogram).
    RecordHistogram.recordBooleanHistogram(
            "Startup.BringToForegroundReason",
            NotificationPlatformBridge.wasNotificationRecentlyClicked());
}
 

/**
 * Called when last of Chrome activities is stopped, ending the foreground session. This will
 * not be called when a Chrome activity is stopped because another Chrome activity takes over.
 * This is ensured by ActivityStatus, which switches to track new activity when its started and
 * will not report the old one being stopped (see createStateListener() below).
 */
private void onForegroundSessionEnd() {
    if (!mIsStarted) return;
    ChromeApplication.flushPersistentData();
    mIsStarted = false;
    mPowerBroadcastReceiver.onForegroundSessionEnd();

    ChildProcessLauncher.onSentToBackground();
    IntentHandler.clearPendingReferrer();
    IntentHandler.clearPendingIncognitoUrl();

    int totalTabCount = 0;
    for (WeakReference<Activity> reference : ApplicationStatus.getRunningActivities()) {
        Activity activity = reference.get();
        if (activity instanceof ChromeActivity) {
            TabModelSelector tabModelSelector =
                    ((ChromeActivity) activity).getTabModelSelector();
            if (tabModelSelector != null) {
                totalTabCount += tabModelSelector.getTotalTabCount();
            }
        }
    }
    RecordHistogram.recordCountHistogram(
            "Tab.TotalTabCount.BeforeLeavingApp", totalTabCount);
}
 

/** Warmup activities that should only happen once. */
@SuppressFBWarnings("DM_EXIT")
private static void initializeBrowser(final Application app) {
    ThreadUtils.assertOnUiThread();
    try {
        ChromeBrowserInitializer.getInstance(app).handleSynchronousStartupWithGpuWarmUp();
    } catch (ProcessInitException e) {
        Log.e(TAG, "ProcessInitException while starting the browser process.");
        // Cannot do anything without the native library, and cannot show a
        // dialog to the user.
        System.exit(-1);
    }
    final Context context = app.getApplicationContext();
    ChildProcessLauncher.warmUp(context);
    ChromeBrowserInitializer.initNetworkChangeNotifier(context);
    WarmupManager.getInstance().initializeViewHierarchy(
            context, R.layout.custom_tabs_control_container, R.layout.custom_tabs_toolbar);
}
 

/**
 * Called when a top-level Chrome activity (ChromeTabbedActivity, FullscreenActivity) is
 * started in foreground. It will not be called again when other Chrome activities take over
 * (see onStart()), that is, when correct activity calls startActivity() for another Chrome
 * activity.
 */
private void onForegroundSessionStart() {
    UmaUtils.recordForegroundStartTime();
    ChildProcessLauncher.onBroughtToForeground();
    updatePasswordEchoState();
    FontSizePrefs.getInstance(mApplication).onSystemFontScaleChanged();
    updateAcceptLanguages();
    mVariationsSession.start(mApplication);
    mPowerBroadcastReceiver.onForegroundSessionStart();

    // Track the ratio of Chrome startups that are caused by notification clicks.
    // TODO(johnme): Add other reasons (and switch to recordEnumeratedHistogram).
    RecordHistogram.recordBooleanHistogram(
            "Startup.BringToForegroundReason",
            NotificationPlatformBridge.wasNotificationRecentlyClicked());
}
 

/**
 * Called when last of Chrome activities is stopped, ending the foreground session. This will
 * not be called when a Chrome activity is stopped because another Chrome activity takes over.
 * This is ensured by ActivityStatus, which switches to track new activity when its started and
 * will not report the old one being stopped (see createStateListener() below).
 */
private void onForegroundSessionEnd() {
    if (!mIsStarted) return;
    UmaUtils.recordBackgroundTime();
    ChromeApplication.flushPersistentData();
    mIsStarted = false;
    mPowerBroadcastReceiver.onForegroundSessionEnd();

    ChildProcessLauncher.onSentToBackground();
    IntentHandler.clearPendingReferrer();
    IntentHandler.clearPendingIncognitoUrl();

    int totalTabCount = 0;
    for (WeakReference<Activity> reference : ApplicationStatus.getRunningActivities()) {
        Activity activity = reference.get();
        if (activity instanceof ChromeActivity) {
            TabModelSelector tabModelSelector =
                    ((ChromeActivity) activity).getTabModelSelector();
            if (tabModelSelector != null) {
                totalTabCount += tabModelSelector.getTotalTabCount();
            }
        }
    }
    RecordHistogram.recordCountHistogram(
            "Tab.TotalTabCount.BeforeLeavingApp", totalTabCount);
}
 

/**
 * Start loading the native library in the background. This kicks off the native initialization
 * process.
 *
 * @param allocateChildConnection Whether a spare child connection should be allocated. Set to
 *                                false if you know that no new renderer is needed.
 */
public void startBackgroundTasks(final boolean allocateChildConnection) {
    // TODO(yusufo) : Investigate using an AsyncTask for this.
    new Thread() {
        @Override
        public void run() {
            try {
                LibraryLoader libraryLoader =
                        LibraryLoader.get(LibraryProcessType.PROCESS_BROWSER);
                libraryLoader.ensureInitialized(mContext.getApplicationContext());
                // The prefetch is done after the library load for two reasons:
                // - It is easier to know the library location after it has
                //   been loaded.
                // - Testing has shown that this gives the best compromise,
                //   by avoiding performance regression on any tested
                //   device, and providing performance improvement on
                //   some. Doing it earlier delays UI inflation and more
                //   generally startup on some devices, most likely by
                //   competing for IO.
                // For experimental results, see http://crbug.com/460438.
                libraryLoader.asyncPrefetchLibrariesToMemory();
            } catch (ProcessInitException e) {
                Log.e(TAG, "Unable to load native library.", e);
                mActivityDelegate.onStartupFailure();
                return;
            }
            if (allocateChildConnection) ChildProcessLauncher.warmUp(mContext);
            ThreadUtils.runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    onLibraryLoaded();
                }
            });
        }
    }.start();
}
 

private void startModerateBindingManagementIfNeeded() {
    // Moderate binding doesn't apply to low end devices.
    if (SysUtils.isLowEndDevice()) return;

    boolean moderateBindingTillBackgrounded =
            FieldTrialList.findFullName("ModerateBindingOnBackgroundTabCreation")
                    .equals("Enabled");
    ChildProcessLauncher.startModerateBindingManagement(
            mAppContext, moderateBindingTillBackgrounded);
}
 

/**
 * Called when last of Chrome activities is stopped, ending the foreground session. This will
 * not be called when a Chrome activity is stopped because another Chrome activity takes over.
 * This is ensured by ActivityStatus, which switches to track new activity when its started and
 * will not report the old one being stopped (see createStateListener() below).
 */
private void onForegroundSessionEnd() {
    if (!mIsStarted) return;
    mBackgroundProcessing.suspendTimers();
    flushPersistentData();
    mIsStarted = false;
    mPowerBroadcastReceiver.onForegroundSessionEnd();

    ChildProcessLauncher.onSentToBackground();
    IntentHandler.clearPendingReferrer();

    if (FeatureUtilities.isDocumentMode(this)) {
        if (sDocumentTabModelSelector != null) {
            RecordHistogram.recordCountHistogram("Tab.TotalTabCount.BeforeLeavingApp",
                    sDocumentTabModelSelector.getTotalTabCount());
        }
    } else {
        int totalTabCount = 0;
        for (WeakReference<Activity> reference : ApplicationStatus.getRunningActivities()) {
            Activity activity = reference.get();
            if (activity instanceof ChromeActivity) {
                TabModelSelector tabModelSelector =
                        ((ChromeActivity) activity).getTabModelSelector();
                if (tabModelSelector != null) {
                    totalTabCount += tabModelSelector.getTotalTabCount();
                }
            }
        }
        RecordHistogram.recordCountHistogram(
                "Tab.TotalTabCount.BeforeLeavingApp", totalTabCount);
    }
}
 

/**
 * Called to swap out the current view with the one passed in.
 *
 * @param newContentViewCore The content view that should be swapped into the tab.
 * @param deleteOldNativeWebContents Whether to delete the native web
 *         contents of old view.
 * @param didStartLoad Whether
 *         WebContentsObserver::DidStartProvisionalLoadForFrame() has
 *         already been called.
 * @param didFinishLoad Whether WebContentsObserver::DidFinishLoad() has
 *         already been called.
 */
public void swapContentViewCore(ContentViewCore newContentViewCore,
        boolean deleteOldNativeWebContents, boolean didStartLoad, boolean didFinishLoad) {
    int originalWidth = 0;
    int originalHeight = 0;
    if (mContentViewCore != null) {
        originalWidth = mContentViewCore.getViewportWidthPix();
        originalHeight = mContentViewCore.getViewportHeightPix();
        mContentViewCore.onHide();
    }
    destroyContentViewCore(deleteOldNativeWebContents);
    NativePage previousNativePage = mNativePage;
    mNativePage = null;
    setContentViewCore(newContentViewCore);
    // Size of the new ContentViewCore is zero at this point. If we don't call onSizeChanged(),
    // next onShow() call would send a resize message with the current ContentViewCore size
    // (zero) to the renderer process, although the new size will be set soon.
    // However, this size fluttering may confuse Blink and rendered result can be broken
    // (see http://crbug.com/340987).
    mContentViewCore.onSizeChanged(originalWidth, originalHeight, 0, 0);
    mContentViewCore.onShow();
    mContentViewCore.attachImeAdapter();

    // If the URL has already committed (e.g. prerendering), tell process management logic that
    // it can rely on the process visibility signal for binding management.
    // TODO: Call ChildProcessLauncher#determinedVisibility() at a more intuitive time.
    // See crbug.com/537671
    if (!mContentViewCore.getWebContents().getLastCommittedUrl().equals("")) {
        ChildProcessLauncher.determinedVisibility(mContentViewCore.getCurrentRenderProcessId());
    }

    destroyNativePageInternal(previousNativePage);
    for (TabObserver observer : mObservers) {
        observer.onWebContentsSwapped(this, didStartLoad, didFinishLoad);
    }
}
 

private void startModerateBindingManagementIfNeeded() {
    // Moderate binding doesn't apply to low end devices.
    if (SysUtils.isLowEndDevice()) return;

    boolean moderateBindingTillBackgrounded =
            FieldTrialList.findFullName("ModerateBindingOnBackgroundTabCreation")
                    .equals("Enabled");
    ChildProcessLauncher.startModerateBindingManagement(
            mAppContext, moderateBindingTillBackgrounded);
}
 

/**
 * Called to swap out the current view with the one passed in.
 *
 * @param newContentViewCore The content view that should be swapped into the tab.
 * @param deleteOldNativeWebContents Whether to delete the native web
 *         contents of old view.
 * @param didStartLoad Whether
 *         WebContentsObserver::DidStartProvisionalLoadForFrame() has
 *         already been called.
 * @param didFinishLoad Whether WebContentsObserver::DidFinishLoad() has
 *         already been called.
 */
public void swapContentViewCore(ContentViewCore newContentViewCore,
        boolean deleteOldNativeWebContents, boolean didStartLoad, boolean didFinishLoad) {
    int originalWidth = 0;
    int originalHeight = 0;
    if (mContentViewCore != null) {
        originalWidth = mContentViewCore.getViewportWidthPix();
        originalHeight = mContentViewCore.getViewportHeightPix();
        mContentViewCore.onHide();
    }

    Rect bounds = new Rect();
    if (originalWidth == 0 && originalHeight == 0) {
        bounds = ExternalPrerenderHandler.estimateContentSize(
                (Application) getApplicationContext(), false);
        originalWidth = bounds.right - bounds.left;
        originalHeight = bounds.bottom - bounds.top;
    }

    destroyContentViewCore(deleteOldNativeWebContents);
    NativePage previousNativePage = mNativePage;
    mNativePage = null;
    // Size of the new ContentViewCore is zero at this point. If we don't call onSizeChanged(),
    // next onShow() call would send a resize message with the current ContentViewCore size
    // (zero) to the renderer process, although the new size will be set soon.
    // However, this size fluttering may confuse Blink and rendered result can be broken
    // (see http://crbug.com/340987).
    newContentViewCore.onSizeChanged(originalWidth, originalHeight, 0, 0);
    if (!bounds.isEmpty()) {
        newContentViewCore.onPhysicalBackingSizeChanged(bounds.right, bounds.bottom);
    }
    newContentViewCore.onShow();
    setContentViewCore(newContentViewCore);

    mContentViewCore.attachImeAdapter();

    // If the URL has already committed (e.g. prerendering), tell process management logic that
    // it can rely on the process visibility signal for binding management.
    // TODO: Call ChildProcessLauncher#determinedVisibility() at a more intuitive time.
    // See crbug.com/537671
    if (!mContentViewCore.getWebContents().getLastCommittedUrl().equals("")) {
        ChildProcessLauncher.determinedVisibility(mContentViewCore.getCurrentRenderProcessId());
    }

    destroyNativePageInternal(previousNativePage);
    for (TabObserver observer : mObservers) {
        observer.onWebContentsSwapped(this, didStartLoad, didFinishLoad);
    }
}
 

private void startModerateBindingManagementIfNeeded(Context context) {
    // Moderate binding doesn't apply to low end devices.
    if (SysUtils.isLowEndDevice()) return;
    ChildProcessLauncher.startModerateBindingManagement(context);
}