Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/toolbar/ToolbarManager.java

+// Copyright 2015 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.chrome.browser.toolbar;
+
+import android.content.Context;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.Message;
+import android.text.TextUtils;
+import android.view.View;
+import android.view.View.OnAttachStateChangeListener;
+
+import com.google.android.apps.chrome.R;
+
+import org.chromium.base.metrics.RecordUserAction;
+import org.chromium.chrome.browser.BookmarksBridge;
+import org.chromium.chrome.browser.ChromeBrowserProviderClient;
+import org.chromium.chrome.browser.CustomSelectionActionModeCallback;
+import org.chromium.chrome.browser.EmptyTabObserver;
+import org.chromium.chrome.browser.Tab;
+import org.chromium.chrome.browser.TabLoadStatus;
+import org.chromium.chrome.browser.TabObserver;
+import org.chromium.chrome.browser.UrlConstants;
+import org.chromium.chrome.browser.appmenu.AppMenuButtonHelper;
+import org.chromium.chrome.browser.appmenu.AppMenuHandler;
+import org.chromium.chrome.browser.appmenu.AppMenuObserver;
+import org.chromium.chrome.browser.compositor.layouts.EmptyOverviewModeObserver;
+import org.chromium.chrome.browser.compositor.layouts.Layout;
+import org.chromium.chrome.browser.compositor.layouts.LayoutManager;
+import org.chromium.chrome.browser.compositor.layouts.OverviewModeBehavior;
+import org.chromium.chrome.browser.compositor.layouts.OverviewModeBehavior.OverviewModeObserver;
+import org.chromium.chrome.browser.compositor.layouts.SceneChangeObserver;
+import org.chromium.chrome.browser.fullscreen.ChromeFullscreenManager;
+import org.chromium.chrome.browser.fullscreen.FullscreenManager;
+import org.chromium.chrome.browser.ntp.NativePageFactory;
+import org.chromium.chrome.browser.ntp.NewTabPage;
+import org.chromium.chrome.browser.omnibox.LocationBar;
+import org.chromium.chrome.browser.omnibox.UrlFocusChangeListener;
+import org.chromium.chrome.browser.partnercustomizations.HomepageManager;
+import org.chromium.chrome.browser.partnercustomizations.HomepageManager.HomepageStateListener;
+import org.chromium.chrome.browser.profiles.Profile;
+import org.chromium.chrome.browser.search_engines.TemplateUrlService;
+import org.chromium.chrome.browser.search_engines.TemplateUrlService.TemplateUrl;
+import org.chromium.chrome.browser.search_engines.TemplateUrlService.TemplateUrlServiceObserver;
+import org.chromium.chrome.browser.tab.ChromeTab;
+import org.chromium.chrome.browser.tabmodel.EmptyTabModelObserver;
+import org.chromium.chrome.browser.tabmodel.EmptyTabModelSelectorObserver;
+import org.chromium.chrome.browser.tabmodel.TabModel;
+import org.chromium.chrome.browser.tabmodel.TabModel.TabLaunchType;
+import org.chromium.chrome.browser.tabmodel.TabModel.TabSelectionType;
+import org.chromium.chrome.browser.tabmodel.TabModelObserver;
+import org.chromium.chrome.browser.tabmodel.TabModelSelector;
+import org.chromium.chrome.browser.tabmodel.TabModelSelectorObserver;
+import org.chromium.chrome.browser.widget.findinpage.FindToolbarManager;
+import org.chromium.chrome.browser.widget.findinpage.FindToolbarObserver;
+import org.chromium.content_public.browser.LoadUrlParams;
+import org.chromium.content_public.browser.NavigationController;
+import org.chromium.content_public.browser.WebContents;
+import org.chromium.ui.base.PageTransition;
+
+import java.util.List;
+
+/**
+ * Contains logic for managing the toolbar visual component.  This class manages the interactions
+ * with the rest of the application to ensure the toolbar is always visually up to date.
+ */
+class ToolbarManager implements ToolbarTabController, UrlFocusChangeListener {
+
+    /**
+     * Handle UI updates of menu icons. Only applicable for phones.
+     */
+    public interface MenuDelegatePhone {
+
+        /**
+         * Called when current tab's loading status changes.
+         *
+         * @param isLoading Whether the current tab is loading.
+         */
+        public void updateReloadButtonState(boolean isLoading);
+    }
+
+    /**
+     * The minimum load progress that can be shown when a page is loading.  This is not 0 so that
+     * it's obvious to the user that something is attempting to load.
+     */
+    public static final int MINIMUM_LOAD_PROGRESS = 5;
+
+    private final ToolbarLayout mToolbar;
+    private final ToolbarControlContainer mControlContainer;
+
+    private TabModelSelector mTabModelSelector;
+    private TabModelSelectorObserver mTabModelSelectorObserver;
+    private TabModelObserver mTabModelObserver;
+    private MenuDelegatePhone mMenuDelegatePhone;
+    private final ToolbarModelImpl mToolbarModel;
+    private Profile mCurrentProfile;
+    private BookmarksBridge mBookmarksBridge;
+    private TemplateUrlServiceObserver mTemplateUrlObserver;
+    private final LocationBar mLocationBar;
+    private FindToolbarManager mFindToolbarManager;
+
+    private final TabObserver mTabObserver;
+    private final BookmarksBridge.BookmarkModelObserver mBookmarksObserver;
+    private final FindToolbarObserver mFindToolbarObserver;
+    private final OverviewModeObserver mOverviewModeObserver;
+    private final SceneChangeObserver mSceneChangeObserver;
+
+    private final LoadProgressSimulator mLoadProgressSimulator;
+
+    private ChromeFullscreenManager mFullscreenManager;
+    private int mFullscreenFocusToken = FullscreenManager.INVALID_TOKEN;
+    private int mFullscreenFindInPageToken = FullscreenManager.INVALID_TOKEN;
+    private int mFullscreenMenuToken = FullscreenManager.INVALID_TOKEN;
+
+    private int mPreselectedTabId = Tab.INVALID_TAB_ID;
+
+    private boolean mNativeLibraryReady;
+    private boolean mTabRestoreCompleted;
+
+    private AppMenuButtonHelper mAppMenuButtonHelper;
+
+    private HomepageStateListener mHomepageStateListener;
+
+    /**
+     * Creates a ToolbarManager object.
+     * @param controlContainer The container of the toolbar.
+     * @param menuHandler The handler for interacting with the menu.
+     */
+    ToolbarManager(ToolbarControlContainer controlContainer, AppMenuHandler menuHandler) {
+        mToolbarModel = new ToolbarModelImpl();
+        mControlContainer = controlContainer;
+        assert mControlContainer != null;
+
+        mToolbar = (ToolbarLayout) controlContainer.findViewById(R.id.toolbar);
+        mLocationBar = mToolbar.getLocationBar();
+        mLocationBar.setToolbarDataProvider(mToolbarModel);
+        mLocationBar.setUrlFocusChangeListener(this);
+
+        setMenuHandler(menuHandler);
+        mToolbar.initialize(mToolbarModel, this, mAppMenuButtonHelper);
+
+        mHomepageStateListener = new HomepageStateListener() {
+            @Override
+            public void onHomepageStateUpdated() {
+                mToolbar.onHomeButtonUpdate(
+                        HomepageManager.isHomepageEnabled(mToolbar.getContext()));
+            }
+        };
+        HomepageManager.getInstance(mToolbar.getContext()).addListener(mHomepageStateListener);
+
+        mTabModelSelectorObserver = new EmptyTabModelSelectorObserver() {
+            @Override
+            public void onTabModelSelected(TabModel newModel, TabModel oldModel) {
+                refreshSelectedTab();
+                updateTabCount();
+                mControlContainer.invalidateBitmap();
+            }
+
+            @Override
+            public void onTabStateInitialized() {
+                mTabRestoreCompleted = true;
+                handleTabRestoreCompleted();
+            }
+        };
+
+        mTabModelObserver = new EmptyTabModelObserver() {
+            @Override
+            public void didAddTab(Tab tab, TabLaunchType type) {
+                updateTabCount();
+            }
+
+            @Override
+            public void didSelectTab(Tab tab, TabSelectionType type, int lastId) {
+                mPreselectedTabId = Tab.INVALID_TAB_ID;
+                refreshSelectedTab();
+            }
+
+            @Override
+            public void tabClosureUndone(Tab tab) {
+                updateTabCount();
+                refreshSelectedTab();
+            }
+
+            @Override
+            public void didCloseTab(Tab tab) {
+                updateTabCount();
+                refreshSelectedTab();
+            }
+
+            @Override
+            public void tabPendingClosure(Tab tab) {
+                updateTabCount();
+                refreshSelectedTab();
+            }
+
+            @Override
+            public void allTabsPendingClosure(List<Integer> tabIds) {
+                updateTabCount();
+                refreshSelectedTab();
+            }
+        };
+
+        mTabObserver = new EmptyTabObserver() {
+            @Override
+            public void onSSLStateUpdated(Tab tab) {
+                super.onSSLStateUpdated(tab);
+                assert tab == mToolbarModel.getTab();
+                mLocationBar.updateSecurityIcon(tab.getSecurityLevel());
+            }
+
+            @Override
+            public void onWebContentsInstantSupportDisabled() {
+                mLocationBar.setUrlToPageUrl();
+            }
+
+            @Override
+            public void onDidNavigateMainFrame(Tab tab, String url, String baseUrl,
+                    boolean isNavigationToDifferentPage, boolean isFragmentNavigation,
+                    int statusCode) {
+                if (isNavigationToDifferentPage) {
+                    mToolbar.onNavigatedToDifferentPage();
+                }
+            }
+
+            @Override
+            public void onPageLoadStarted(Tab tab) {
+                updateButtonStatus();
+                updateTabLoadingState(true, true);
+            }
+
+            @Override
+            public void onPageLoadFinished(Tab tab) {
+                ToolbarManager.this.onPageLoadFinished();
+            }
+
+            @Override
+            public void onPageLoadFailed(Tab tab, int errorCode) {
+                ToolbarManager.this.onPageLoadFailed();
+            }
+
+            @Override
+            public void onUrlUpdated(Tab tab) {
+                // Update the SSL security state as a result of this notification as it will
+                // sometimes be the only update we receive.
+                updateTabLoadingState(false, true);
+
+                // A URL update is a decent enough indicator that the toolbar widget is in
+                // a stable state to capture its bitmap for use in fullscreen.
+                mControlContainer.setReadyForBitmapCapture(true);
+            }
+
+            @Override
+            public void onCrash(Tab tab, boolean sadTabShown) {
+                onTabCrash();
+            }
+
+            @Override
+            public void onLoadProgressChanged(Tab tab, int progress) {
+                updateLoadProgress(progress);
+            }
+
+            @Override
+            public void onContentChanged(Tab tab) {
+                mToolbar.onTabContentViewChanged();
+            }
+
+            @Override
+            public void onWebContentsSwapped(Tab tab, boolean didStartLoad, boolean didFinishLoad) {
+                if (!didStartLoad) return;
+
+                ChromeTab chromeTab = ChromeTab.fromTab(tab);
+                if (!chromeTab.getBackgroundContentViewHelper().isPageSwappingInProgress()
+                        && didFinishLoad) {
+                    mLoadProgressSimulator.start();
+                }
+            }
+
+            @Override
+            public void onDidStartNavigationToPendingEntry(Tab tab, String url) {
+                // Update URL as soon as it becomes available when it's a new tab.
+                // But we want to update only when it's a new tab. So we check whether the current
+                // navigation entry is initial, meaning whether it has the same target URL as the
+                // initial URL of the tab.
+                WebContents webContents = tab.getWebContents();
+                if (webContents == null) return;
+                NavigationController navigationController = webContents.getNavigationController();
+                if (navigationController == null) return;
+                if (navigationController.isInitialNavigation()) {
+                    mLocationBar.setUrlToPageUrl();
+                }
+            }
+
+            @Override
+            public void onLoadUrl(Tab tab, LoadUrlParams params, int loadType) {
+                NewTabPage ntp = mToolbarModel.getNewTabPageForCurrentTab();
+                if (ntp == null) return;
+                if (!NewTabPage.isNTPUrl(params.getUrl())
+                        && loadType != TabLoadStatus.PAGE_LOAD_FAILED) {
+                    ntp.setUrlFocusAnimationsDisabled(true);
+                    mToolbar.onTabOrModelChanged();
+                }
+            }
+
+            @Override
+            public void onDidFailLoad(Tab tab, boolean isProvisionalLoad, boolean isMainFrame,
+                    int errorCode, String description, String failingUrl) {
+                NewTabPage ntp = mToolbarModel.getNewTabPageForCurrentTab();
+                if (ntp == null) return;
+                if (isProvisionalLoad && isMainFrame) {
+                    ntp.setUrlFocusAnimationsDisabled(false);
+                    mToolbar.onTabOrModelChanged();
+                }
+            }
+        };
+
+        mBookmarksObserver = new BookmarksBridge.BookmarkModelObserver() {
+            @Override
+            public void bookmarkModelChanged() {
+                updateBookmarkButtonStatus();
+            }
+        };
+
+        mFindToolbarObserver = new FindToolbarObserver() {
+            @Override
+            public void onFindToolbarShown() {
+                mToolbar.handleFindToolbarStateChange(true);
+                if (mFullscreenManager != null) {
+                    mFullscreenFindInPageToken =
+                            mFullscreenManager.showControlsPersistentAndClearOldToken(
+                                    mFullscreenFindInPageToken);
+                }
+            }
+
+            @Override
+            public void onFindToolbarHidden() {
+                mToolbar.handleFindToolbarStateChange(false);
+                if (mFullscreenManager != null) {
+                    mFullscreenManager.hideControlsPersistent(mFullscreenFindInPageToken);
+                    mFullscreenFindInPageToken = FullscreenManager.INVALID_TOKEN;
+                }
+            }
+        };
+
+        mOverviewModeObserver = new EmptyOverviewModeObserver() {
+            @Override
+            public void onOverviewModeStartedShowing(boolean showToolbar) {
+                mToolbar.setTabSwitcherMode(true, showToolbar, false);
+                updateButtonStatus();
+            }
+
+            @Override
+            public void onOverviewModeStartedHiding(boolean showToolbar, boolean delayAnimation) {
+                mToolbar.setTabSwitcherMode(false, showToolbar, delayAnimation);
+                updateButtonStatus();
+            }
+
+            @Override
+            public void onOverviewModeFinishedHiding() {
+                mToolbar.onTabSwitcherTransitionFinished();
+            }
+        };
+
+        mSceneChangeObserver = new SceneChangeObserver() {
+            @Override
+            public void onTabSelectionHinted(int tabId) {
+                mPreselectedTabId = tabId;
+                refreshSelectedTab();
+            }
+
+            @Override
+            public void onSceneChange(Layout layout) {
+                mToolbar.setContentAttached(layout.shouldDisplayContentOverlay());
+            }
+        };
+
+        mLoadProgressSimulator = new LoadProgressSimulator(this);
+    }
+
+    /**
+     * Initialize the manager with the components that had native initialization dependencies.
+     * <p>
+     * Calling this must occur after the native library have completely loaded.
+     *
+     * @param tabModelSelector     The selector that handles tab management.
+     * @param fullscreenManager    The manager in charge of interacting with the fullscreen feature.
+     * @param findToolbarManager   The manager for find in page.
+     * @param overviewModeBehavior The overview mode manager.
+     * @param layoutDriver         A {@link LayoutManager} instance used to watch for scene changes.
+     */
+    public void initializeWithNative(TabModelSelector tabModelSelector,
+            ChromeFullscreenManager fullscreenManager,
+            final FindToolbarManager findToolbarManager,
+            final OverviewModeBehavior overviewModeBehavior,
+            final LayoutManager layoutDriver) {
+        mTabModelSelector = tabModelSelector;
+        mToolbarModel.initializeWithNative();
+        mToolbar.addOnAttachStateChangeListener(new OnAttachStateChangeListener() {
+            @Override
+            public void onViewDetachedFromWindow(View v) {
+                Context context = mToolbar.getContext();
+                HomepageManager.getInstance(context).removeListener(mHomepageStateListener);
+                mTabModelSelector.removeObserver(mTabModelSelectorObserver);
+                for (TabModel model : mTabModelSelector.getModels()) {
+                    model.removeObserver(mTabModelObserver);
+                }
+                if (mBookmarksBridge != null) {
+                    mBookmarksBridge.destroy();
+                    mBookmarksBridge = null;
+                }
+                if (mTemplateUrlObserver != null) {
+                    TemplateUrlService.getInstance().removeObserver(mTemplateUrlObserver);
+                    mTemplateUrlObserver = null;
+                }
+
+                findToolbarManager.removeObserver(mFindToolbarObserver);
+                if (overviewModeBehavior != null) {
+                    overviewModeBehavior.removeOverviewModeObserver(mOverviewModeObserver);
+                }
+                if (layoutDriver != null) {
+                    layoutDriver.removeSceneChangeObserver(mSceneChangeObserver);
+                }
+            }
+
+            @Override
+            public void onViewAttachedToWindow(View v) {
+                // As we have only just registered for notifications, any that were sent prior to
+                // this may have been missed.
+                // Calling refreshSelectedTab in case we missed the initial selection notification.
+                refreshSelectedTab();
+            }
+        });
+
+        mFindToolbarManager = findToolbarManager;
+
+        assert fullscreenManager != null;
+        mFullscreenManager = fullscreenManager;
+
+        mNativeLibraryReady = false;
+
+        findToolbarManager.addObserver(mFindToolbarObserver);
+        if (overviewModeBehavior != null) {
+            overviewModeBehavior.addOverviewModeObserver(mOverviewModeObserver);
+        }
+        if (layoutDriver != null) layoutDriver.addSceneChangeObserver(mSceneChangeObserver);
+
+        onNativeLibraryReady();
+    }
+
+    /**
+     * @return The toolbar interface that this manager handles.
+     */
+    public Toolbar getToolbar() {
+        return mToolbar;
+    }
+
+    /**
+     * Called when the accessibility enabled state changes.
+     * @param enabled Whether accessibility is enabled.
+     */
+    public void onAccessibilityStatusChanged(boolean enabled) {
+        mToolbar.onAccessibilityStatusChanged(enabled);
+    }
+
+    private void registerTemplateUrlObserver() {
+        final TemplateUrlService templateUrlService = TemplateUrlService.getInstance();
+        assert mTemplateUrlObserver == null;
+        mTemplateUrlObserver = new TemplateUrlServiceObserver() {
+            private TemplateUrl mSearchEngine =
+                    templateUrlService.getDefaultSearchEngineTemplateUrl();
+
+            @Override
+            public void onTemplateURLServiceChanged() {
+                TemplateUrl searchEngine = templateUrlService.getDefaultSearchEngineTemplateUrl();
+                if ((mSearchEngine == null && searchEngine == null)
+                        || (mSearchEngine != null && mSearchEngine.equals(searchEngine))) {
+                    return;
+                }
+
+                mSearchEngine = searchEngine;
+                mToolbar.onDefaultSearchEngineChanged();
+            }
+        };
+        templateUrlService.addObserver(mTemplateUrlObserver);
+    }
+
+    private void onNativeLibraryReady() {
+        mNativeLibraryReady = true;
+        mToolbar.onNativeLibraryReady();
+
+        final TemplateUrlService templateUrlService = TemplateUrlService.getInstance();
+        TemplateUrlService.LoadListener mTemplateServiceLoadListener =
+                new TemplateUrlService.LoadListener() {
+                    @Override
+                    public void onTemplateUrlServiceLoaded() {
+                        registerTemplateUrlObserver();
+                        templateUrlService.unregisterLoadListener(this);
+                    }
+                };
+        templateUrlService.registerLoadListener(mTemplateServiceLoadListener);
+        if (templateUrlService.isLoaded()) {
+            mTemplateServiceLoadListener.onTemplateUrlServiceLoaded();
+        } else {
+            templateUrlService.load();
+        }
+
+        mTabModelSelector.addObserver(mTabModelSelectorObserver);
+        for (TabModel model : mTabModelSelector.getModels()) model.addObserver(mTabModelObserver);
+
+        refreshSelectedTab();
+        if (mTabModelSelector.isTabStateInitialized()) mTabRestoreCompleted = true;
+        handleTabRestoreCompleted();
+    }
+
+    private void handleTabRestoreCompleted() {
+        if (!mTabRestoreCompleted || !mNativeLibraryReady) return;
+        mToolbar.onStateRestored();
+        updateTabCount();
+    }
+
+    /**
+     * Sets the handler for any special case handling related with the menu button.
+     * @param menuHandler The handler to be used.
+     */
+    private void setMenuHandler(AppMenuHandler menuHandler) {
+        menuHandler.addObserver(new AppMenuObserver() {
+            @Override
+            public void onMenuVisibilityChanged(boolean isVisible) {
+                if (mFullscreenManager == null) return;
+                if (isVisible) {
+                    mFullscreenMenuToken =
+                            mFullscreenManager.showControlsPersistentAndClearOldToken(
+                                    mFullscreenMenuToken);
+                } else {
+                    mFullscreenManager.hideControlsPersistent(mFullscreenMenuToken);
+                    mFullscreenMenuToken = FullscreenManager.INVALID_TOKEN;
+                }
+            }
+        });
+        mAppMenuButtonHelper = new AppMenuButtonHelper(menuHandler);
+        mAppMenuButtonHelper.setOnAppMenuShownListener(new Runnable() {
+            @Override
+            public void run() {
+                RecordUserAction.record("MobileToolbarShowMenu");
+            }
+        });
+        mLocationBar.setMenuButtonHelper(mAppMenuButtonHelper);
+    }
+
+    /**
+     * Set the delegate that will handle updates from toolbar driven state changes.
+     * @param menuDelegatePhone The menu delegate to be updated (only applicable to phones).
+     */
+    public void setMenuDelegatePhone(MenuDelegatePhone menuDelegatePhone) {
+        mMenuDelegatePhone = menuDelegatePhone;
+    }
+
+    /**
+     * Sets a custom ActionMode.Callback instance to the LocationBar's UrlBar.  This lets us
+     * get notified when the user tries to do copy, paste, etc. on the UrlBar.
+     * @param callback The ActionMode.Callback instance to be notified when selection ActionMode
+     * is triggered.
+     */
+    public void setDefaultActionModeCallbackForTextEdit(
+            CustomSelectionActionModeCallback callback) {
+        mLocationBar.setDefaultTextEditActionModeCallback(callback);
+    }
+
+    @Override
+    public boolean back() {
+        Tab tab = mToolbarModel.getTab();
+        if (tab != null && tab.canGoBack()) {
+            tab.goBack();
+            updateButtonStatus();
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public boolean forward() {
+        Tab tab = mToolbarModel.getTab();
+        if (tab != null && tab.canGoForward()) {
+            tab.goForward();
+            updateButtonStatus();
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public void stopOrReloadCurrentTab() {
+        Tab currentTab = mToolbarModel.getTab();
+        if (currentTab != null) {
+            if (currentTab.isLoading()) {
+                currentTab.stopLoading();
+            } else {
+                currentTab.reload();
+                RecordUserAction.record("MobileToolbarReload");
+            }
+        }
+        updateButtonStatus();
+    }
+
+    @Override
+    public void openHomepage() {
+        Tab currentTab = mToolbarModel.getTab();
+        assert currentTab != null;
+        Context context = mToolbar.getContext();
+        String homePageUrl = HomepageManager.getHomepageUri(context);
+        if (TextUtils.isEmpty(homePageUrl)) {
+            homePageUrl = UrlConstants.NTP_URL;
+        }
+        currentTab.loadUrl(new LoadUrlParams(homePageUrl, PageTransition.HOME_PAGE));
+    }
+
+    /**
+     * Triggered when the URL input field has gained or lost focus.
+     * @param hasFocus Whether the URL field has gained focus.
+     */
+    @Override
+    public void onUrlFocusChange(boolean hasFocus) {
+        mToolbar.onUrlFocusChange(hasFocus);
+
+        if (mFindToolbarManager != null && hasFocus) mFindToolbarManager.hideToolbar();
+
+        if (mFullscreenManager == null) return;
+        if (hasFocus) {
+            mFullscreenFocusToken = mFullscreenManager.showControlsPersistentAndClearOldToken(
+                    mFullscreenFocusToken);
+        } else {
+            mFullscreenManager.hideControlsPersistent(mFullscreenFocusToken);
+            mFullscreenFocusToken = FullscreenManager.INVALID_TOKEN;
+        }
+    }
+
+    /**
+     * Update the primary color used by the model to the given color.
+     * @param color The primary color for the current tab.
+     */
+    public void updatePrimaryColor(int color) {
+        boolean colorChanged = mToolbarModel.getPrimaryColor() != color;
+        if (!colorChanged) return;
+
+        mToolbarModel.setPrimaryColor(color);
+        mToolbar.onPrimaryColorChanged();
+    }
+
+    /**
+     * Updates the current number of Tabs based on the TabModel this Toolbar contains.
+     */
+    private void updateTabCount() {
+        if (!mTabRestoreCompleted) return;
+        mToolbar.updateTabCountVisuals(mTabModelSelector.getCurrentModel().getCount());
+    }
+
+    /**
+     * Updates the current button states and calls appropriate abstract visibility methods, giving
+     * inheriting classes the chance to update the button visuals as well.
+     */
+    private void updateButtonStatus() {
+        Tab currentTab = mToolbarModel.getTab();
+        boolean tabCrashed = currentTab != null && currentTab.isShowingSadTab();
+
+        mToolbar.updateBackButtonVisibility(currentTab != null && currentTab.canGoBack());
+        mToolbar.updateForwardButtonVisibility(currentTab != null && currentTab.canGoForward());
+        updateReloadState(tabCrashed);
+        updateBookmarkButtonStatus();
+
+        mToolbar.getMenuButton().setVisibility(
+                mToolbar.shouldShowMenuButton() ? View.VISIBLE : View.GONE);
+    }
+
+    private void updateBookmarkButtonStatus() {
+        Tab currentTab = mToolbarModel.getTab();
+        boolean isBookmarked = currentTab != null
+                && currentTab.getBookmarkId() != ChromeBrowserProviderClient.INVALID_BOOKMARK_ID;
+        mToolbar.updateBookmarkButtonVisibility(isBookmarked);
+    }
+
+    private void updateReloadState(boolean tabCrashed) {
+        Tab currentTab = mToolbarModel.getTab();
+        boolean isLoading = false;
+        if (!tabCrashed) {
+            isLoading = (currentTab != null && currentTab.isLoading()) || !mNativeLibraryReady;
+        }
+        mToolbar.updateReloadButtonVisibility(isLoading);
+        if (mMenuDelegatePhone != null) mMenuDelegatePhone.updateReloadButtonState(isLoading);
+    }
+
+    /**
+     * Triggered when the selected tab has changed.
+     */
+    private void refreshSelectedTab() {
+        ChromeTab tab = null;
+        if (mPreselectedTabId != Tab.INVALID_TAB_ID) {
+            tab = ChromeTab.fromTab(mTabModelSelector.getTabById(mPreselectedTabId));
+        }
+        if (tab == null) tab = ChromeTab.fromTab(mTabModelSelector.getCurrentTab());
+
+        boolean wasIncognito = mToolbarModel.isIncognito();
+        ChromeTab previousTab = ChromeTab.fromTab(mToolbarModel.getTab());
+
+        boolean isIncognito =
+                tab != null ? tab.isIncognito() : mTabModelSelector.isIncognitoSelected();
+        mToolbarModel.setTab(tab, isIncognito);
+
+        updateCurrentTabDisplayStatus();
+        if (previousTab != tab || wasIncognito != isIncognito) {
+            if (previousTab != tab) {
+                if (previousTab != null) previousTab.removeObserver(mTabObserver);
+                if (tab != null) tab.addObserver(mTabObserver);
+            }
+            int defaultPrimaryColor = isIncognito
+                    ? mToolbar.getResources().getColor(R.color.incognito_primary_color)
+                    : mToolbar.getResources().getColor(R.color.default_primary_color);
+            int primaryColor = (tab != null && tab.getWebContents() != null)
+                    ? tab.getWebContents().getThemeColor(defaultPrimaryColor) : defaultPrimaryColor;
+            updatePrimaryColor(primaryColor);
+
+            mToolbar.onTabOrModelChanged();
+
+            if (tab != null && tab.getWebContents() != null
+                    && tab.getWebContents().isLoadingToDifferentDocument()) {
+                mToolbar.onNavigatedToDifferentPage();
+            }
+        }
+
+        Profile profile = mTabModelSelector.getModel(isIncognito).getProfile();
+        if (mCurrentProfile != profile) {
+            if (mBookmarksBridge != null) mBookmarksBridge.destroy();
+            mBookmarksBridge = new BookmarksBridge(profile);
+            mBookmarksBridge.addObserver(mBookmarksObserver);
+            mLocationBar.setAutocompleteProfile(profile);
+            mCurrentProfile = profile;
+        }
+    }
+
+    private void updateCurrentTabDisplayStatus() {
+        Tab currentTab = mToolbarModel.getTab();
+        mLocationBar.setUrlToPageUrl();
+        if (currentTab == null) {
+            updateLoadProgressInternal(0);
+            updateButtonStatus();
+            return;
+        }
+        boolean isLoading = currentTab.isLoading();
+        updateTabLoadingState(isLoading, true);
+
+        if (currentTab.getProgress() == 100 || currentTab.isShowingInterstitialPage()) {
+            // We are switching to a tab that is fully loaded. Don't set the load progress to 1.0,
+            // that would cause the load progress bar to show briefly.
+            updateLoadProgressInternal(0);
+        } else {
+            updateLoadProgress(currentTab.getProgress());
+        }
+        updateButtonStatus();
+    }
+
+    private void onTabCrash() {
+        updateTabLoadingState(false, false);
+        updateLoadProgressInternal(0);
+        updateButtonStatus();
+    }
+
+    private void onPageLoadFinished() {
+        Tab currentTab = mToolbarModel.getTab();
+        updateTabLoadingState(false, true);
+        int currentProgress = currentTab.getProgress();
+        if (currentProgress != 100) {
+            // If we made some progress, fast-forward to complete, otherwise just dismiss any
+            // MINIMUM_LOAD_PROGRESS that had been set.
+            if (currentProgress > MINIMUM_LOAD_PROGRESS) {
+                updateLoadProgress(100);
+            } else {
+                updateLoadProgressInternal(0);
+            }
+        }
+        updateButtonStatus();
+    }
+
+    private void onPageLoadFailed() {
+        updateTabLoadingState(false, true);
+        updateButtonStatus();
+        updateLoadProgressInternal(0);
+    }
+
+    private void updateTabLoadingState(boolean isLoading, boolean updateUrl) {
+        Tab currentTab = mToolbarModel.getTab();
+        mLocationBar.updateLoadingState(updateUrl);
+        if (isLoading) updateLoadProgress(currentTab.getProgress());
+        if (updateUrl) updateButtonStatus();
+    }
+
+    private void updateLoadProgressInternal(int progress) {
+        if (progress == mToolbarModel.getLoadProgress()) return;
+        mToolbarModel.setLoadProgress(progress);
+        mToolbar.setLoadProgress(progress);
+        if (progress == 0) mLoadProgressSimulator.cancel();
+    }
+
+    private void updateLoadProgress(int progress) {
+        mLoadProgressSimulator.cancel();
+        progress = Math.max(progress, MINIMUM_LOAD_PROGRESS);
+        Tab tab = mToolbarModel.getTab();
+        if (tab != null
+                && NativePageFactory.isNativePageUrl(tab.getUrl(), tab.isIncognito())) {
+            progress = 0;
+        }
+        updateLoadProgressInternal(progress);
+        if (progress == 100 || progress == 0) {
+            updateButtonStatus();
+        } else {
+            // Update the reload state regardless or whether or not the progress is 100.
+            updateReloadState(false);
+        }
+    }
+
+    private static class LoadProgressSimulator {
+        private static final int MSG_ID_UPDATE_PROGRESS = 1;
+
+        private static final int PROGRESS_INCREMENT = 10;
+        private static final int PROGRESS_INCREMENT_DELAY_MS = 10;
+
+        private final ToolbarManager mToolbar;
+        private final Handler mHandler;
+
+        private int mProgress;
+
+        public LoadProgressSimulator(ToolbarManager toolbar) {
+            mToolbar = toolbar;
+            mHandler = new Handler(Looper.getMainLooper()) {
+                @Override
+                public void handleMessage(Message msg) {
+                    assert msg.what == MSG_ID_UPDATE_PROGRESS;
+                    mProgress = Math.min(100, mProgress += PROGRESS_INCREMENT);
+                    mToolbar.updateLoadProgressInternal(mProgress);
+
+                    if (mProgress >= 100) return;
+                    sendEmptyMessageDelayed(MSG_ID_UPDATE_PROGRESS, PROGRESS_INCREMENT_DELAY_MS);
+                }
+            };
+        }
+
+        /**
+         * Start simulating load progress from a baseline of 0.
+         */
+        public void start() {
+            mProgress = 0;
+            mHandler.sendEmptyMessage(MSG_ID_UPDATE_PROGRESS);
+        }
+
+        /**
+         * Cancels simulating load progress.
+         */
+        public void cancel() {
+            mHandler.removeMessages(MSG_ID_UPDATE_PROGRESS);
+        }
+    }
+}