Java Code Examples for org.chromium.chrome.browser.tab.Tab#isNativePage()

/**
 * Sets the correct size for all {@link View}s on {@code tab} and sets the correct rendering
 * parameters on all {@link ContentViewCore}s on {@code tab}.
 * @param tab The {@link Tab} to initialize.
 */
private void initializeTab(Tab tab) {
    sCachedCVCList.clear();
    if (mLayoutManager != null) {
        mLayoutManager.getActiveLayout().getAllContentViewCores(sCachedCVCList);
    }

    for (int i = 0; i < sCachedCVCList.size(); i++) {
        initializeContentViewCore(sCachedCVCList.get(i));
    }
    sCachedCVCList.clear();

    sCachedViewList.clear();
    tab.getAllContentViews(sCachedViewList);

    for (int i = 0; i < sCachedViewList.size(); i++) {
        View view = sCachedViewList.get(i);
        // Calling View#measure() and View#layout() on a View before adding it to the view
        // hierarchy seems to cause issues with compound drawables on some versions of Android.
        // We don't need to proactively size the NTP as we don't need the Android view to render
        // if it's not actually attached to the view hierarchy (http://crbug.com/462114).
        if (view == tab.getView() && tab.isNativePage()) continue;
        setSizeOfUnattachedView(view);
    }
    sCachedViewList.clear();
}
 

/**
 * Sets the correct size for {@link View} on {@code tab} and sets the correct rendering
 * parameters on {@link ContentViewCore} on {@code tab}.
 * @param tab The {@link Tab} to initialize.
 */
private void initializeTab(Tab tab) {
    ContentViewCore content = tab.getActiveContentViewCore();
    if (content != null) initializeContentViewCore(content);

    View view = tab.getContentView();
    if (view != tab.getView() || !tab.isNativePage()) setSizeOfUnattachedView(view);
}
 

@Override
public void show(long time, boolean animate) {
    super.show(time, animate);

    Tab tab = mTabModelSelector.getCurrentTab();
    if (tab != null && tab.isNativePage()) mTabContentManager.cacheTabThumbnail(tab);

    // Remove any views in case we're getting another call to show before we hide (quickly
    // toggling the tab switcher button).
    mViewContainer.removeAllViews();
    int currentTabModel = mTabModelSelector.isIncognitoSelected() ? 1 : 0;

    for (int i = mStacks.length - 1; i >= 0; --i) {
        mStacks[i].reset();
        if (mStacks[i].isDisplayable()) {
            mStacks[i].show(i == currentTabModel);
        } else {
            mStacks[i].cleanupTabs();
        }
    }
    // Initialize the animation and the positioning of all the elements
    mSortingComparator = mOrderComparator;
    resetScrollData();
    for (int i = mStacks.length - 1; i >= 0; --i) {
        if (mStacks[i].isDisplayable()) {
            boolean offscreen = (i != getTabStackIndex());
            mStacks[i].stackEntered(time, !offscreen);
        }
    }
    startMarginAnimation(true);
    startYOffsetAnimation(true);
    flingStacks(getTabStackIndex() == 1);

    if (!animate) onUpdateAnimation(time, true);

    // We will render before we get a call to updateLayout.  Need to make sure all of the tabs
    // we need to render are up to date.
    updateLayout(time, 0);
}
 

private Animator createNewTabOpenedAnimator(
        StackTab[] tabs, ViewGroup container, TabModel model, int focusIndex) {
    Tab tab = model.getTabAt(focusIndex);
    if (tab == null || !tab.isNativePage()) return null;

    View view = tab.getView();
    if (view == null) return null;

    // Set up the view hierarchy
    if (view.getParent() != null) ((ViewGroup) view.getParent()).removeView(view);
    ViewGroup bgView = new FrameLayout(view.getContext());
    bgView.setBackgroundColor(tab.getBackgroundColor());
    bgView.addView(view);
    container.addView(
            bgView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

    // Update any compositor state that needs to change
    if (tabs != null && focusIndex >= 0 && focusIndex < tabs.length) {
        tabs[focusIndex].setAlpha(0.f);
    }

    // Build the view animations
    PropertyValuesHolder xScale = PropertyValuesHolder.ofFloat(View.SCALE_X, 0.f, 1.f);
    PropertyValuesHolder yScale = PropertyValuesHolder.ofFloat(View.SCALE_Y, 0.f, 1.f);
    PropertyValuesHolder alpha = PropertyValuesHolder.ofFloat(View.ALPHA, 0.f, 1.f);
    ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(
            bgView, xScale, yScale, alpha);

    animator.setDuration(TAB_OPENED_ANIMATION_DURATION);
    animator.setInterpolator(BakedBezierInterpolator.TRANSFORM_FOLLOW_THROUGH_CURVE);

    float insetPx = TAB_OPENED_PIVOT_INSET_DP * mDpToPx;

    bgView.setPivotY(TAB_OPENED_PIVOT_INSET_DP);
    bgView.setPivotX(LocalizationUtils.isLayoutRtl() ? mWidthDp * mDpToPx - insetPx : insetPx);
    return animator;
}
 

@Override
public void show(long time, boolean animate) {
    super.show(time, animate);

    Tab tab = mTabModelSelector.getCurrentTab();
    if (tab != null && tab.isNativePage()) mTabContentManager.cacheTabThumbnail(tab);

    // Remove any views in case we're getting another call to show before we hide (quickly
    // toggling the tab switcher button).
    mViewContainer.removeAllViews();
    int currentTabModel = mTabModelSelector.isIncognitoSelected() ? 1 : 0;

    for (int i = mStacks.length - 1; i >= 0; --i) {
        mStacks[i].reset();
        if (mStacks[i].isDisplayable()) {
            mStacks[i].show(i == currentTabModel);
        } else {
            mStacks[i].cleanupTabs();
        }
    }
    // Initialize the animation and the positioning of all the elements
    mSortingComparator = mOrderComparator;
    resetScrollData();
    for (int i = mStacks.length - 1; i >= 0; --i) {
        if (mStacks[i].isDisplayable()) {
            boolean offscreen = (i != getTabStackIndex());
            mStacks[i].stackEntered(time, !offscreen);
        }
    }
    startMarginAnimation(true);
    startYOffsetAnimation(true);
    flingStacks(getTabStackIndex() == 1);

    if (!animate) onUpdateAnimation(time, true);

    // We will render before we get a call to updateLayout.  Need to make sure all of the tabs
    // we need to render are up to date.
    updateLayout(time, 0);
}
 

@Override
public void show(long time, boolean animate) {
    super.show(time, animate);

    if (mTabModelSelector != null && mTabContentManager != null) {
        Tab tab = mTabModelSelector.getCurrentTab();
        if (tab != null && tab.isNativePage()) mTabContentManager.cacheTabThumbnail(tab);
    }

    reset();
}
 

private Animator createNewTabOpenedAnimator(
        StackTab[] tabs, ViewGroup container, TabModel model, int focusIndex) {
    Tab tab = model.getTabAt(focusIndex);
    if (tab == null || !tab.isNativePage()) return null;

    View view = tab.getView();
    if (view == null) return null;

    // Set up the view hierarchy
    if (view.getParent() != null) ((ViewGroup) view.getParent()).removeView(view);
    ViewGroup bgView = new FrameLayout(view.getContext());
    bgView.setBackgroundColor(tab.getBackgroundColor());
    bgView.addView(view);
    container.addView(
            bgView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

    // Update any compositor state that needs to change
    if (tabs != null && focusIndex >= 0 && focusIndex < tabs.length) {
        tabs[focusIndex].setAlpha(0.f);
    }

    // Build the view animations
    PropertyValuesHolder xScale = PropertyValuesHolder.ofFloat(View.SCALE_X, 0.f, 1.f);
    PropertyValuesHolder yScale = PropertyValuesHolder.ofFloat(View.SCALE_Y, 0.f, 1.f);
    PropertyValuesHolder alpha = PropertyValuesHolder.ofFloat(View.ALPHA, 0.f, 1.f);
    ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(
            bgView, xScale, yScale, alpha);

    animator.setDuration(TAB_OPENED_ANIMATION_DURATION);
    animator.setInterpolator(BakedBezierInterpolator.TRANSFORM_FOLLOW_THROUGH_CURVE);

    float insetPx = TAB_OPENED_PIVOT_INSET_DP * mDpToPx;

    bgView.setPivotY(TAB_OPENED_PIVOT_INSET_DP);
    bgView.setPivotX(LocalizationUtils.isLayoutRtl() ? mWidthDp * mDpToPx - insetPx : insetPx);
    return animator;
}
 

@Override
public void show(long time, boolean animate) {
    super.show(time, animate);
    init();
    if (mTabModelSelector == null) return;
    Tab tab = mTabModelSelector.getCurrentTab();
    if (tab != null && tab.isNativePage()) mTabContentManager.cacheTabThumbnail(tab);

    TabModel model = mTabModelSelector.getCurrentModel();
    if (model == null) return;
    int fromTabId = mTabModelSelector.getCurrentTabId();
    if (fromTabId == TabModel.INVALID_TAB_INDEX) return;
    mFromTab = createLayoutTab(fromTabId, model.isIncognito(), NO_CLOSE_BUTTON, NEED_TITLE);
    prepareLayoutTabForSwipe(mFromTab, false);
}
 

/**
 * Sets the correct size for {@link View} on {@code tab} and sets the correct rendering
 * parameters on {@link ContentViewCore} on {@code tab}.
 * @param tab The {@link Tab} to initialize.
 */
private void initializeTab(Tab tab) {
    ContentViewCore content = tab.getActiveContentViewCore();
    if (content != null) initializeContentViewCore(content);

    View view = tab.getContentView();
    if (view != tab.getView() || !tab.isNativePage()) setSizeOfUnattachedView(view);
}
 

@Override
public void show(long time, boolean animate) {
    super.show(time, animate);

    Tab tab = mTabModelSelector.getCurrentTab();
    if (tab != null && tab.isNativePage()) mTabContentManager.cacheTabThumbnail(tab);

    // Remove any views in case we're getting another call to show before we hide (quickly
    // toggling the tab switcher button).
    mViewContainer.removeAllViews();
    int currentTabModel = mTabModelSelector.isIncognitoSelected() ? 1 : 0;

    for (int i = mStacks.length - 1; i >= 0; --i) {
        mStacks[i].reset();
        if (mStacks[i].isDisplayable()) {
            mStacks[i].show(i == currentTabModel);
        } else {
            mStacks[i].cleanupTabs();
        }
    }
    // Initialize the animation and the positioning of all the elements
    mSortingComparator = mOrderComparator;
    resetScrollData();
    for (int i = mStacks.length - 1; i >= 0; --i) {
        if (mStacks[i].isDisplayable()) {
            boolean offscreen = (i != getTabStackIndex());
            mStacks[i].stackEntered(time, !offscreen);
        }
    }
    startMarginAnimation(true);
    startYOffsetAnimation(true);
    flingStacks(getTabStackIndex() == 1);

    if (!animate) onUpdateAnimation(time, true);

    // We will render before we get a call to updateLayout.  Need to make sure all of the tabs
    // we need to render are up to date.
    updateLayout(time, 0);
}
 

@Override
public void show(long time, boolean animate) {
    super.show(time, animate);

    if (mTabModelSelector != null && mTabContentManager != null) {
        Tab tab = mTabModelSelector.getCurrentTab();
        if (tab != null && tab.isNativePage()) mTabContentManager.cacheTabThumbnail(tab);
    }

    reset();
}
 

private Animator createNewTabOpenedAnimator(
        StackTab[] tabs, ViewGroup container, TabModel model, int focusIndex) {
    Tab tab = model.getTabAt(focusIndex);
    if (tab == null || !tab.isNativePage()) return null;

    View view = tab.getView();
    if (view == null) return null;

    // Set up the view hierarchy
    if (view.getParent() != null) ((ViewGroup) view.getParent()).removeView(view);
    ViewGroup bgView = new FrameLayout(view.getContext());
    bgView.setBackgroundColor(tab.getBackgroundColor());
    bgView.addView(view);
    container.addView(
            bgView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

    // Update any compositor state that needs to change
    if (tabs != null && focusIndex >= 0 && focusIndex < tabs.length) {
        tabs[focusIndex].setAlpha(0.f);
    }

    // Build the view animations
    PropertyValuesHolder xScale = PropertyValuesHolder.ofFloat(View.SCALE_X, 0.f, 1.f);
    PropertyValuesHolder yScale = PropertyValuesHolder.ofFloat(View.SCALE_Y, 0.f, 1.f);
    PropertyValuesHolder alpha = PropertyValuesHolder.ofFloat(View.ALPHA, 0.f, 1.f);
    ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(
            bgView, xScale, yScale, alpha);

    animator.setDuration(TAB_OPENED_ANIMATION_DURATION);
    animator.setInterpolator(BakedBezierInterpolator.TRANSFORM_FOLLOW_THROUGH_CURVE);

    float insetPx = TAB_OPENED_PIVOT_INSET_DP * mDpToPx;

    bgView.setPivotY(TAB_OPENED_PIVOT_INSET_DP);
    bgView.setPivotX(LocalizationUtils.isLayoutRtl() ? mWidthDp * mDpToPx - insetPx : insetPx);
    return animator;
}
 

@Override
public void show(long time, boolean animate) {
    super.show(time, animate);

    if (mTabModelSelector != null && mTabContentManager != null) {
        Tab tab = mTabModelSelector.getCurrentTab();
        if (tab != null && tab.isNativePage()) mTabContentManager.cacheTabThumbnail(tab);
    }

    reset();
}
 

@Override
public void requestToShowTab(Tab tab, TabSelectionType type) {
    boolean isFromExternalApp = tab != null
            && tab.getLaunchType() == TabLaunchType.FROM_EXTERNAL_APP;

    if (mVisibleTab != tab && tab != null && !tab.isNativePage()) {
        TabModelImpl.startTabSwitchLatencyTiming(type);
    }
    if (mVisibleTab != null && mVisibleTab != tab && !mVisibleTab.needsReload()) {
        if (mVisibleTab.isInitialized() && !mVisibleTab.isDetached()) {
            // TODO(dtrainor): Once we figure out why we can't grab a snapshot from the current
            // tab when we have other tabs loading from external apps remove the checks for
            // FROM_EXTERNAL_APP/FROM_NEW.
            if (!mVisibleTab.isClosing()
                    && (!isFromExternalApp || type != TabSelectionType.FROM_NEW)) {
                cacheTabBitmap(mVisibleTab);
            }
            mVisibleTab.hide();
            mTabSaver.addTabToSaveQueue(mVisibleTab);
        }
        mVisibleTab = null;
    }

    if (tab == null) {
        notifyChanged();
        return;
    }

    // We hit this case when the user enters tab switcher and comes back to the current tab
    // without actual tab switch.
    if (mVisibleTab == tab && !mVisibleTab.isHidden()) {
        // The current tab might have been killed by the os while in tab switcher.
        tab.loadIfNeeded();
        return;
    }
    mVisibleTab = tab;

    // Don't execute the tab display part if Chrome has just been sent to background. This
    // avoids uneccessary work (tab restore) and prevents pollution of tab display metrics - see
    // http://crbug.com/316166.
    if (type != TabSelectionType.FROM_EXIT) {
        tab.show(type);
        mUma.onShowTab(tab.getId(), tab.isBeingRestored());
    }
}
 

/**
 * Handles menu item selection and keyboard shortcuts.
 *
 * @param id The ID of the selected menu item (defined in main_menu.xml) or
 *           keyboard shortcut (defined in values.xml).
 * @param fromMenu Whether this was triggered from the menu.
 * @return Whether the action was handled.
 */
public boolean onMenuOrKeyboardAction(int id, boolean fromMenu) {
    if (id == R.id.preferences_id) {
        PreferencesLauncher.launchSettingsPage(this, null);
        RecordUserAction.record("MobileMenuSettings");
    } else if (id == R.id.show_menu) {
        showAppMenuForKeyboardEvent();
    }

    if (id == R.id.update_menu_id) {
        UpdateMenuItemHelper.getInstance().onMenuItemClicked(this);
        return true;
    }

    // All the code below assumes currentTab is not null, so return early if it is null.
    final Tab currentTab = getActivityTab();
    if (currentTab == null) {
        return false;
    } else if (id == R.id.forward_menu_id) {
        if (currentTab.canGoForward()) {
            currentTab.goForward();
            RecordUserAction.record("MobileMenuForward");
            RecordUserAction.record("MobileTabClobbered");
        }
    } else if (id == R.id.bookmark_this_page_id) {
        addOrEditBookmark(currentTab);
        RecordUserAction.record("MobileMenuAddToBookmarks");
    } else if (id == R.id.reload_menu_id) {
        if (currentTab.isLoading()) {
            currentTab.stopLoading();
        } else {
            currentTab.reload();
            RecordUserAction.record("MobileToolbarReload");
        }
    } else if (id == R.id.info_menu_id) {
        WebsiteSettingsPopup.show(
                this, currentTab, null, WebsiteSettingsPopup.OPENED_FROM_MENU);
    } else if (id == R.id.open_history_menu_id) {
        currentTab.loadUrl(
                new LoadUrlParams(UrlConstants.HISTORY_URL, PageTransition.AUTO_TOPLEVEL));
        RecordUserAction.record("MobileMenuHistory");
        StartupMetrics.getInstance().recordOpenedHistory();
    } else if (id == R.id.share_menu_id || id == R.id.direct_share_menu_id) {
        onShareMenuItemSelected(id == R.id.direct_share_menu_id,
                getCurrentTabModel().isIncognito());
    } else if (id == R.id.print_id) {
        PrintingController printingController = getChromeApplication().getPrintingController();
        if (printingController != null && !printingController.isBusy()
                && PrefServiceBridge.getInstance().isPrintingEnabled()) {
            printingController.startPrint(new TabPrinter(currentTab),
                    new PrintManagerDelegateImpl(this));
            RecordUserAction.record("MobileMenuPrint");
        }
    } else if (id == R.id.add_to_homescreen_id) {
        AddToHomescreenDialog.show(this, currentTab);
        RecordUserAction.record("MobileMenuAddToHomescreen");
    } else if (id == R.id.request_desktop_site_id) {
        final boolean reloadOnChange = !currentTab.isNativePage();
        final boolean usingDesktopUserAgent = currentTab.getUseDesktopUserAgent();
        currentTab.setUseDesktopUserAgent(!usingDesktopUserAgent, reloadOnChange);
        RecordUserAction.record("MobileMenuRequestDesktopSite");
    } else if (id == R.id.reader_mode_prefs_id) {
        if (currentTab.getWebContents() != null) {
            RecordUserAction.record("DomDistiller_DistilledPagePrefsOpened");
            AlertDialog.Builder builder =
                    new AlertDialog.Builder(this, R.style.AlertDialogTheme);
            builder.setView(DistilledPagePrefsView.create(this));
            builder.show();
        }
    } else if (id == R.id.help_id) {
        // Since reading back the compositor is asynchronous, we need to do the readback
        // before starting the GoogleHelp.
        String helpContextId = HelpAndFeedback.getHelpContextIdFromUrl(
                this, currentTab.getUrl(), getCurrentTabModel().isIncognito());
        HelpAndFeedback.getInstance(this)
                .show(this, helpContextId, currentTab.getProfile(), currentTab.getUrl());
        RecordUserAction.record("MobileMenuFeedback");
    } else {
        return false;
    }
    return true;
}
 

@Override
public void requestToShowTab(Tab tab, TabSelectionType type) {
    boolean isFromExternalApp = tab != null
            && tab.getLaunchType() == TabLaunchType.FROM_EXTERNAL_APP;

    if (mVisibleTab != tab && tab != null && !tab.isNativePage()) {
        TabModelImpl.startTabSwitchLatencyTiming(type);
    }
    if (mVisibleTab != null && mVisibleTab != tab && !mVisibleTab.needsReload()) {
        if (mVisibleTab.isInitialized() && !mVisibleTab.isDetachedForReparenting()) {
            // TODO(dtrainor): Once we figure out why we can't grab a snapshot from the current
            // tab when we have other tabs loading from external apps remove the checks for
            // FROM_EXTERNAL_APP/FROM_NEW.
            if (!mVisibleTab.isClosing()
                    && (!isFromExternalApp || type != TabSelectionType.FROM_NEW)) {
                cacheTabBitmap(mVisibleTab);
            }
            mVisibleTab.hide();
            mVisibleTab.setFullscreenManager(null);
            mTabSaver.addTabToSaveQueue(mVisibleTab);
        }
        mVisibleTab = null;
    }

    if (tab == null) {
        notifyChanged();
        return;
    }

    // We hit this case when the user enters tab switcher and comes back to the current tab
    // without actual tab switch.
    if (mVisibleTab == tab && !mVisibleTab.isHidden()) {
        // The current tab might have been killed by the os while in tab switcher.
        tab.loadIfNeeded();
        return;
    }

    tab.setFullscreenManager(mActivity.getFullscreenManager());
    mVisibleTab = tab;

    // Don't execute the tab display part if Chrome has just been sent to background. This
    // avoids uneccessary work (tab restore) and prevents pollution of tab display metrics - see
    // http://crbug.com/316166.
    if (type != TabSelectionType.FROM_EXIT) {
        tab.show(type);
        mUma.onShowTab(tab.getId(), tab.isBeingRestored());
    }
}
 

/**
 * Handles menu item selection and keyboard shortcuts.
 *
 * @param id The ID of the selected menu item (defined in main_menu.xml) or
 *           keyboard shortcut (defined in values.xml).
 * @param fromMenu Whether this was triggered from the menu.
 * @return Whether the action was handled.
 */
public boolean onMenuOrKeyboardAction(int id, boolean fromMenu) {
    if (id == R.id.preferences_id) {
        PreferencesLauncher.launchSettingsPage(this, null);
        RecordUserAction.record("MobileMenuSettings");
    } else if (id == R.id.show_menu) {
        showAppMenuForKeyboardEvent();
    }

    if (id == R.id.update_menu_id) {
        UpdateMenuItemHelper.getInstance().onMenuItemClicked(this);
        return true;
    }

    // All the code below assumes currentTab is not null, so return early if it is null.
    final Tab currentTab = getActivityTab();
    if (currentTab == null) {
        return false;
    } else if (id == R.id.forward_menu_id) {
        if (currentTab.canGoForward()) {
            currentTab.goForward();
            RecordUserAction.record("MobileMenuForward");
            RecordUserAction.record("MobileTabClobbered");
        }
    } else if (id == R.id.bookmark_this_page_id) {
        addOrEditBookmark(currentTab);
        RecordUserAction.record("MobileMenuAddToBookmarks");
    } else if (id == R.id.offline_page_id) {
        DownloadUtils.downloadOfflinePage(this, currentTab);
        RecordUserAction.record("MobileMenuDownloadPage");
    } else if (id == R.id.reload_menu_id) {
        if (currentTab.isLoading()) {
            currentTab.stopLoading();
            RecordUserAction.record("MobileMenuStop");
        } else {
            currentTab.reload();
            RecordUserAction.record("MobileMenuReload");
        }
    } else if (id == R.id.info_menu_id) {
        WebsiteSettingsPopup.show(
                this, currentTab, null, WebsiteSettingsPopup.OPENED_FROM_MENU);
    } else if (id == R.id.open_history_menu_id) {
        currentTab.loadUrl(
                new LoadUrlParams(UrlConstants.HISTORY_URL, PageTransition.AUTO_TOPLEVEL));
        RecordUserAction.record("MobileMenuHistory");
        StartupMetrics.getInstance().recordOpenedHistory();
    } else if (id == R.id.share_menu_id || id == R.id.direct_share_menu_id) {
        onShareMenuItemSelected(id == R.id.direct_share_menu_id,
                getCurrentTabModel().isIncognito());
    } else if (id == R.id.print_id) {
        PrintingController printingController = PrintingControllerImpl.getInstance();
        if (printingController != null && !printingController.isBusy()
                && PrefServiceBridge.getInstance().isPrintingEnabled()) {
            printingController.startPrint(new TabPrinter(currentTab),
                    new PrintManagerDelegateImpl(this));
            RecordUserAction.record("MobileMenuPrint");
        }
    } else if (id == R.id.add_to_homescreen_id) {
        AddToHomescreenManager addToHomescreenManager =
                new AddToHomescreenManager(this, currentTab);
        addToHomescreenManager.start();
        RecordUserAction.record("MobileMenuAddToHomescreen");
    } else if (id == R.id.request_desktop_site_id) {
        final boolean reloadOnChange = !currentTab.isNativePage();
        final boolean usingDesktopUserAgent = currentTab.getUseDesktopUserAgent();
        currentTab.setUseDesktopUserAgent(!usingDesktopUserAgent, reloadOnChange);
        RecordUserAction.record("MobileMenuRequestDesktopSite");
    } else if (id == R.id.reader_mode_prefs_id) {
        if (currentTab.getWebContents() != null) {
            RecordUserAction.record("DomDistiller_DistilledPagePrefsOpened");
            AlertDialog.Builder builder =
                    new AlertDialog.Builder(this, R.style.AlertDialogTheme);
            builder.setView(DistilledPagePrefsView.create(this));
            builder.show();
        }
    } else if (id == R.id.help_id) {
        // Since reading back the compositor is asynchronous, we need to do the readback
        // before starting the GoogleHelp.
        String helpContextId = HelpAndFeedback.getHelpContextIdFromUrl(
                this, currentTab.getUrl(), getCurrentTabModel().isIncognito());
        HelpAndFeedback.getInstance(this)
                .show(this, helpContextId, currentTab.getProfile(), currentTab.getUrl());
        RecordUserAction.record("MobileMenuFeedback");
    } else {
        return false;
    }
    return true;
}
 

public static boolean featureIsAvailable(Tab currentTab) {
    PrintingController printingController = PrintingControllerImpl.getInstance();
    return (printingController != null && !currentTab.isNativePage()
            && !printingController.isBusy()
            && PrefServiceBridge.getInstance().isPrintingEnabled());
}
 

/**
 * Should be called when a tab created event is triggered.
 * @param id             The id of the tab that was created.
 * @param sourceId       The id of the creating tab if any.
 * @param launchType     How the tab was launched.
 * @param incognito      Whether or not the created tab is incognito.
 * @param willBeSelected Whether or not the created tab will be selected.
 * @param originX        The x coordinate of the action that created this tab in dp.
 * @param originY        The y coordinate of the action that created this tab in dp.
 */
protected void tabCreated(int id, int sourceId, TabLaunchType launchType, boolean incognito,
        boolean willBeSelected, float originX, float originY) {
    Tab newTab = TabModelUtils.getTabById(getTabModelSelector().getModel(incognito), id);
    mCreatingNtp = newTab != null && newTab.isNativePage();

    int newIndex = TabModelUtils.getTabIndexById(getTabModelSelector().getModel(incognito), id);
    getActiveLayout().onTabCreated(
            time(), id, newIndex, sourceId, incognito, !willBeSelected, originX, originY);
}
 

/**
 * Should be called when a tab created event is triggered.
 * @param id             The id of the tab that was created.
 * @param sourceId       The id of the creating tab if any.
 * @param launchType     How the tab was launched.
 * @param incognito      Whether or not the created tab is incognito.
 * @param willBeSelected Whether or not the created tab will be selected.
 * @param originX        The x coordinate of the action that created this tab in dp.
 * @param originY        The y coordinate of the action that created this tab in dp.
 */
protected void tabCreated(int id, int sourceId, TabLaunchType launchType, boolean incognito,
        boolean willBeSelected, float originX, float originY) {
    Tab newTab = TabModelUtils.getTabById(getTabModelSelector().getModel(incognito), id);
    mCreatingNtp = newTab != null && newTab.isNativePage();

    int newIndex = TabModelUtils.getTabIndexById(getTabModelSelector().getModel(incognito), id);
    getActiveLayout().onTabCreated(
            time(), id, newIndex, sourceId, incognito, !willBeSelected, originX, originY);
}