src/com/android/browser/BaseUi.java

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.browser;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.graphics.drawable.PaintDrawable;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.text.TextUtils;
import android.view.ActionMode;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;
import android.view.WindowManager;
import android.view.inputmethod.InputMethodManager;
import android.webkit.WebChromeClient.CustomViewCallback;
import android.widget.FrameLayout;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.Toast;

import com.android.browser.R;
import com.android.browser.Tab.SecurityState;

import org.codeaurora.swe.WebView;

import java.util.List;

/**
 * UI interface definitions
 */
public abstract class BaseUi implements UI {

    private static final String LOGTAG = "BaseUi";

    protected static final FrameLayout.LayoutParams COVER_SCREEN_PARAMS =
        new FrameLayout.LayoutParams(
        ViewGroup.LayoutParams.MATCH_PARENT,
        ViewGroup.LayoutParams.MATCH_PARENT);

    protected static final FrameLayout.LayoutParams COVER_SCREEN_GRAVITY_CENTER =
        new FrameLayout.LayoutParams(
        ViewGroup.LayoutParams.MATCH_PARENT,
        ViewGroup.LayoutParams.MATCH_PARENT,
        Gravity.CENTER);

    private static final int MSG_HIDE_TITLEBAR = 1;
    public static final int HIDE_TITLEBAR_DELAY = 1500; // in ms

    Activity mActivity;
    UiController mUiController;
    TabControl mTabControl;
    protected Tab mActiveTab;
    private InputMethodManager mInputManager;

    private Drawable mLockIconSecure;
    private Drawable mLockIconMixed;
    protected Drawable mGenericFavicon;

    protected FrameLayout mContentView;
    protected FrameLayout mCustomViewContainer;
    protected FrameLayout mFullscreenContainer;
    private FrameLayout mFixedTitlebarContainer;

    private View mCustomView;
    private CustomViewCallback mCustomViewCallback;
    private int mOriginalOrientation;

    private LinearLayout mErrorConsoleContainer = null;

    private UrlBarAutoShowManager mUrlBarAutoShowManager;

    private Toast mStopToast;

    // the default <video> poster
    private Bitmap mDefaultVideoPoster;
    // the video progress view
    private View mVideoProgressView;

    private boolean mActivityPaused;
    protected boolean mUseQuickControls;
    protected TitleBar mTitleBar;
    private NavigationBarBase mNavigationBar;
    protected PieControl mPieControl;
    private boolean mBlockFocusAnimations;

    public BaseUi(Activity browser, UiController controller) {
        mActivity = browser;
        mUiController = controller;
        mTabControl = controller.getTabControl();
        Resources res = mActivity.getResources();
        mInputManager = (InputMethodManager)
                browser.getSystemService(Activity.INPUT_METHOD_SERVICE);
        mLockIconSecure = res.getDrawable(R.drawable.ic_secure_holo_dark);
        mLockIconMixed = res.getDrawable(R.drawable.ic_secure_partial_holo_dark);
        FrameLayout frameLayout = (FrameLayout) mActivity.getWindow()
                .getDecorView().findViewById(android.R.id.content);
        LayoutInflater.from(mActivity)
                .inflate(R.layout.custom_screen, frameLayout);
        mFixedTitlebarContainer = (FrameLayout) frameLayout.findViewById(
                R.id.fixed_titlebar_container);
        mContentView = (FrameLayout) frameLayout.findViewById(
                R.id.main_content);
        mCustomViewContainer = (FrameLayout) frameLayout.findViewById(
                R.id.fullscreen_custom_content);
        mErrorConsoleContainer = (LinearLayout) frameLayout
                .findViewById(R.id.error_console);
        setFullscreen(BrowserSettings.getInstance().useFullscreen());
        mGenericFavicon = res.getDrawable(
                R.drawable.app_web_browser_sm);
        mTitleBar = new TitleBar(mActivity, mUiController, this,
                mContentView);
        mTitleBar.setProgress(100);
        mNavigationBar = mTitleBar.getNavigationBar();
        mUrlBarAutoShowManager = new UrlBarAutoShowManager(this);
    }

    private void cancelStopToast() {
        if (mStopToast != null) {
            mStopToast.cancel();
            mStopToast = null;
        }
    }

    // lifecycle

    public void onPause() {
        if (isCustomViewShowing()) {
            onHideCustomView();
        }
        cancelStopToast();
        mActivityPaused = true;
    }

    public void onResume() {
        mActivityPaused = false;
        // check if we exited without setting active tab
        // b: 5188145
        final Tab ct = mTabControl.getCurrentTab();
        if (ct != null) {
            setActiveTab(ct);
        }
        mTitleBar.onResume();
    }

    protected boolean isActivityPaused() {
        return mActivityPaused;
    }

    public void onConfigurationChanged(Configuration config) {
    }

    public Activity getActivity() {
        return mActivity;
    }

    // key handling

    @Override
    public boolean onBackKey() {
        if (mCustomView != null) {
            mUiController.hideCustomView();
            return true;
        }
        return false;
    }

    @Override
    public boolean onMenuKey() {
        return false;
    }

    @Override
    public void setUseQuickControls(boolean useQuickControls) {
        mUseQuickControls = useQuickControls;
        mTitleBar.setUseQuickControls(mUseQuickControls);
        if (useQuickControls) {
            mPieControl = new PieControl(mActivity, mUiController, this);
            mPieControl.attachToContainer(mContentView);
        } else {
            if (mPieControl != null) {
                mPieControl.removeFromContainer(mContentView);
            }
        }
        updateUrlBarAutoShowManagerTarget();
    }

    // Tab callbacks
    @Override
    public void onTabDataChanged(Tab tab) {
        setUrlTitle(tab);
        setFavicon(tab);
        updateLockIconToLatest(tab);
        updateNavigationState(tab);
        mTitleBar.onTabDataChanged(tab);
        mNavigationBar.onTabDataChanged(tab);
        onProgressChanged(tab);
    }

    @Override
    public void onProgressChanged(Tab tab) {
        int progress = tab.getLoadProgress();
        if (tab.inForeground()) {
            mTitleBar.setProgress(progress);
        }
    }

    @Override
    public void bookmarkedStatusHasChanged(Tab tab) {
        if (tab.inForeground()) {
            boolean isBookmark = tab.isBookmarkedSite();
            mNavigationBar.setCurrentUrlIsBookmark(isBookmark);
        }
    }

    @Override
    public void onPageStopped(Tab tab) {
        cancelStopToast();
        if (tab.inForeground()) {
            mStopToast = Toast
                    .makeText(mActivity, R.string.stopping, Toast.LENGTH_SHORT);
            mStopToast.show();
        }
    }

    @Override
    public boolean needsRestoreAllTabs() {
        return true;
    }

    @Override
    public void addTab(Tab tab) {
    }

    @Override
    public void setActiveTab(final Tab tab) {
        if (tab == null) return;
        Tab tabToRemove = null;
        BrowserWebView webViewToWaitFor = null;

        // block unnecessary focus change animations during tab switch
        mBlockFocusAnimations = true;
        mHandler.removeMessages(MSG_HIDE_TITLEBAR);
        if ((tab != mActiveTab) && (mActiveTab != null)) {
            tabToRemove = mActiveTab;
            WebView web = mActiveTab.getWebView();
            if (web != null) {
                web.setOnTouchListener(null);
            }
        }
        mActiveTab = tab;
        BrowserWebView web = (BrowserWebView) mActiveTab.getWebView();
        updateUrlBarAutoShowManagerTarget();
        attachTabToContentView(tab);
        if (web != null) {
            // Request focus on the top window.
            if (mUseQuickControls) {
                mPieControl.forceToTop(mContentView);
                web.setTitleBar(null);
                mTitleBar.hide();
            } else {
                web.setTitleBar(mTitleBar);
                mTitleBar.onScrollChanged();
            }
            webViewToWaitFor = web;
        }
        mTitleBar.bringToFront();
        tab.getTopWindow().requestFocus();
        setShouldShowErrorConsole(tab, mUiController.shouldShowErrorConsole());
        onTabDataChanged(tab);
        onProgressChanged(tab);
        mNavigationBar.setIncognitoMode(tab.isPrivateBrowsingEnabled());
        mBlockFocusAnimations = false;

        scheduleRemoveTab(tabToRemove, webViewToWaitFor);
    }

    Tab mTabToRemove = null;
    BrowserWebView mWebViewToWaitFor = null;
    int mNumRemoveTries = 0;

    protected void scheduleRemoveTab(Tab tab, BrowserWebView webview) {
        //remove previously scehduled tab
        if (mTabToRemove != null) {
            removeTabFromContentView(mTabToRemove);
            mTabToRemove.performPostponedDestroy();
        }
        mTabToRemove = tab;
        mWebViewToWaitFor = webview;
        mNumRemoveTries = 0;

        if (mTabToRemove != null) {
            mTabToRemove.postponeDestroy();
            android.os.Handler handler = mTitleBar.getHandler();
            handler.postDelayed(new Runnable() {
                public void run() {
                    tryRemoveTab();
                }
            }, 33); /*we know at this point for sure that the new tab is not ready
                      since it's just getting created.  It'll be at least 1 frame's
                      time that the new tab will painting something, and another 1
                      frame's time that we're sure the swap is done.  It is possible
                      that the swap is finish right the way, but unless use use EGL
                      fence we can never be sure.  So wait for 2 frames before trying
                      to remove the tab.  It is possible that the tab is still not
                      ready after 2 frames, but this is good enough.*/
        }
    }

    protected void tryRemoveTab() {
        mNumRemoveTries++;
        if (mNumRemoveTries < 20 && mWebViewToWaitFor != null) {
            if (!mWebViewToWaitFor.isReady()) {
                android.os.Handler handler = mTitleBar.getHandler();
                handler.postDelayed(new Runnable() {
                    public void run() {
                        tryRemoveTab();
                    }
                }, 33); /*if the new tab is still not ready, wait another 2 frames
                          before trying again.  1 frame for the tab to render the first
                          frame, another 1 frame to make sure the swap is done*/
                return;
            }
        }
        if (mTabToRemove != null) {
            removeTabFromContentView(mTabToRemove);
            mTabToRemove.performPostponedDestroy();
        }
        mTabToRemove = null;
        mWebViewToWaitFor = null;
    }

    protected void updateUrlBarAutoShowManagerTarget() {
        WebView web = mActiveTab != null ? mActiveTab.getWebView() : null;
        if (!mUseQuickControls && web instanceof BrowserWebView) {
            mUrlBarAutoShowManager.setTarget((BrowserWebView) web);
        } else {
            mUrlBarAutoShowManager.setTarget(null);
        }
    }

    Tab getActiveTab() {
        return mActiveTab;
    }

    @Override
    public void updateTabs(List<Tab> tabs) {
    }

    @Override
    public void removeTab(Tab tab) {
        if (mActiveTab == tab) {
            removeTabFromContentView(tab);
            mActiveTab = null;
        }
    }

    @Override
    public void detachTab(Tab tab) {
        removeTabFromContentView(tab);
    }

    @Override
    public void attachTab(Tab tab) {
        attachTabToContentView(tab);
    }

    protected void attachTabToContentView(Tab tab) {
        if ((tab == null) || (tab.getWebView() == null)) {
            return;
        }
        View container = tab.getViewContainer();
        WebView mainView  = tab.getWebView();
        // Attach the WebView to the container and then attach the
        // container to the content view.
        FrameLayout wrapper =
                (FrameLayout) container.findViewById(R.id.webview_wrapper);
        ViewGroup parent = (ViewGroup) mainView.getParent();
        if (parent != wrapper) {
            if (parent != null) {
                parent.removeView(mainView);
            }
            wrapper.addView(mainView);
        }
        parent = (ViewGroup) container.getParent();
        if (parent != mContentView) {
            if (parent != null) {
                parent.removeView(container);
            }
            mContentView.addView(container, COVER_SCREEN_PARAMS);
        }
        mUiController.attachSubWindow(tab);
    }

    private void removeTabFromContentView(Tab tab) {
        hideTitleBar();
        // Remove the container that contains the main WebView.
        WebView mainView = tab.getWebView();
        View container = tab.getViewContainer();
        if (mainView == null) {
            return;
        }
        // Remove the container from the content and then remove the
        // WebView from the container. This will trigger a focus change
        // needed by WebView.
        FrameLayout wrapper =
                (FrameLayout) container.findViewById(R.id.webview_wrapper);
        wrapper.removeView(mainView);
        mContentView.removeView(container);
        mUiController.endActionMode();
        mUiController.removeSubWindow(tab);
        ErrorConsoleView errorConsole = tab.getErrorConsole(false);
        if (errorConsole != null) {
            mErrorConsoleContainer.removeView(errorConsole);
        }
    }

    @Override
    public void onSetWebView(Tab tab, WebView webView) {
        View container = tab.getViewContainer();
        if (container == null) {
            // The tab consists of a container view, which contains the main
            // WebView, as well as any other UI elements associated with the tab.
            container = mActivity.getLayoutInflater().inflate(R.layout.tab,
                    mContentView, false);
            tab.setViewContainer(container);
        }
        if (tab.getWebView() != webView) {
            // Just remove the old one.
            FrameLayout wrapper =
                    (FrameLayout) container.findViewById(R.id.webview_wrapper);
            wrapper.removeView(tab.getWebView());
        }
    }

    /**
     * create a sub window container and webview for the tab
     * Note: this methods operates through side-effects for now
     * it sets both the subView and subViewContainer for the given tab
     * @param tab tab to create the sub window for
     * @param subView webview to be set as a subwindow for the tab
     */
    @Override
    public void createSubWindow(Tab tab, WebView subView) {
        View subViewContainer = mActivity.getLayoutInflater().inflate(
                R.layout.browser_subwindow, null);
        ViewGroup inner = (ViewGroup) subViewContainer
                .findViewById(R.id.inner_container);
        inner.addView(subView, new LayoutParams(LayoutParams.MATCH_PARENT,
                LayoutParams.MATCH_PARENT));
        final ImageButton cancel = (ImageButton) subViewContainer
                .findViewById(R.id.subwindow_close);
        final WebView cancelSubView = subView;
        cancel.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                ((BrowserWebView) cancelSubView).getWebChromeClient().onCloseWindow(cancelSubView);
            }
        });
        tab.setSubWebView(subView);
        tab.setSubViewContainer(subViewContainer);
    }

    /**
     * Remove the sub window from the content view.
     */
    @Override
    public void removeSubWindow(View subviewContainer) {
        mContentView.removeView(subviewContainer);
        mUiController.endActionMode();
    }

    /**
     * Attach the sub window to the content view.
     */
    @Override
    public void attachSubWindow(View container) {
        if (container.getParent() != null) {
            // already attached, remove first
            ((ViewGroup) container.getParent()).removeView(container);
        }
        mContentView.addView(container, COVER_SCREEN_PARAMS);
    }

    protected void refreshWebView() {
        WebView web = getWebView();
        if (web != null) {
            web.invalidate();
        }
    }

    public void editUrl(boolean clearInput, boolean forceIME) {
        if (mUiController.isInCustomActionMode()) {
            mUiController.endActionMode();
        }
        showTitleBar();
        if ((getActiveTab() != null) && !getActiveTab().isSnapshot()) {
            mNavigationBar.startEditingUrl(clearInput, forceIME);
        }
    }

    boolean canShowTitleBar() {
        return !isTitleBarShowing()
                && !isActivityPaused()
                && (getActiveTab() != null)
                && (getWebView() != null)
                && !mUiController.isInCustomActionMode();
    }

    protected void showTitleBar() {
        mHandler.removeMessages(MSG_HIDE_TITLEBAR);
        if (canShowTitleBar()) {
            mTitleBar.show();
        }
    }

    protected void hideTitleBar() {
        if (mTitleBar.isShowing()) {
            mTitleBar.hide();
        }
    }

    protected boolean isTitleBarShowing() {
        return mTitleBar.isShowing();
    }

    public boolean isEditingUrl() {
        return mTitleBar.isEditingUrl();
    }

    public void stopEditingUrl() {
        mTitleBar.getNavigationBar().stopEditingUrl();
    }

    public TitleBar getTitleBar() {
        return mTitleBar;
    }

    @Override
    public void showComboView(ComboViews startingView, Bundle extras) {
        Intent intent = new Intent(mActivity, ComboViewActivity.class);
        intent.putExtra(ComboViewActivity.EXTRA_INITIAL_VIEW, startingView.name());
        intent.putExtra(ComboViewActivity.EXTRA_COMBO_ARGS, extras);
        Tab t = getActiveTab();
        if (t != null) {
            intent.putExtra(ComboViewActivity.EXTRA_CURRENT_URL, t.getUrl());
        }
        mActivity.startActivityForResult(intent, Controller.COMBO_VIEW);
    }

    @Override
    public void showCustomView(View view, int requestedOrientation,
            CustomViewCallback callback) {
        // if a view already exists then immediately terminate the new one
        if (mCustomView != null) {
            callback.onCustomViewHidden();
            return;
        }

        mOriginalOrientation = mActivity.getRequestedOrientation();
        FrameLayout decor = (FrameLayout) mActivity.getWindow().getDecorView();
        mFullscreenContainer = new FullscreenHolder(mActivity);
        mFullscreenContainer.addView(view, COVER_SCREEN_PARAMS);
        decor.addView(mFullscreenContainer, COVER_SCREEN_PARAMS);
        mCustomView = view;
        setFullscreen(true);
        ((BrowserWebView) getWebView()).setVisibility(View.INVISIBLE);
        mCustomViewCallback = callback;
        mActivity.setRequestedOrientation(requestedOrientation);
    }

    @Override
    public void onHideCustomView() {
        ((BrowserWebView) getWebView()).setVisibility(View.VISIBLE);
        if (mCustomView == null)
            return;
        setFullscreen(false);
        FrameLayout decor = (FrameLayout) mActivity.getWindow().getDecorView();
        decor.removeView(mFullscreenContainer);
        mFullscreenContainer = null;
        mCustomView = null;
        mCustomViewCallback.onCustomViewHidden();
        // Show the content view.
        mActivity.setRequestedOrientation(mOriginalOrientation);
    }

    @Override
    public boolean isCustomViewShowing() {
        return mCustomView != null;
    }

    protected void dismissIME() {
        if (mInputManager.isActive()) {
            mInputManager.hideSoftInputFromWindow(mContentView.getWindowToken(),
                    0);
        }
    }

    @Override
    public boolean isWebShowing() {
        return mCustomView == null;
    }

    // -------------------------------------------------------------------------

    protected void updateNavigationState(Tab tab) {
    }

    /**
     * Update the lock icon to correspond to our latest state.
     */
    protected void updateLockIconToLatest(Tab t) {
        if (t != null && t.inForeground()) {
            updateLockIconImage(t.getSecurityState());
        }
    }

    /**
     * Updates the lock-icon image in the title-bar.
     */
    private void updateLockIconImage(SecurityState securityState) {
        Drawable d = null;
        if (securityState == SecurityState.SECURITY_STATE_SECURE) {
            d = mLockIconSecure;
        } else if (securityState == SecurityState.SECURITY_STATE_MIXED
                || securityState == SecurityState.SECURITY_STATE_BAD_CERTIFICATE) {
            // TODO: It would be good to have different icons for insecure vs mixed content.
            // See http://b/5403800
            d = mLockIconMixed;
        }
        mNavigationBar.setLock(d);
    }

    protected void setUrlTitle(Tab tab) {
        String url = tab.getUrl();
        String title = tab.getTitle();
        if (TextUtils.isEmpty(title)) {
            title = url;
        }
        if (tab.inForeground()) {
            mNavigationBar.setDisplayTitle(url);
        }
    }

    // Set the favicon in the title bar.
    protected void setFavicon(Tab tab) {
        if (tab.inForeground()) {
            Bitmap icon = tab.getFavicon();
            mNavigationBar.setFavicon(icon);
        }
    }

    // active tabs page

    public void showActiveTabsPage() {
    }

    /**
     * Remove the active tabs page.
     */
    public void removeActiveTabsPage() {
    }

    // menu handling callbacks

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        return true;
    }

    @Override
    public void updateMenuState(Tab tab, Menu menu) {
    }

    @Override
    public void onOptionsMenuOpened() {
    }

    @Override
    public void onExtendedMenuOpened() {
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        return false;
    }

    @Override
    public void onOptionsMenuClosed(boolean inLoad) {
    }

    @Override
    public void onExtendedMenuClosed(boolean inLoad) {
    }

    @Override
    public void onContextMenuCreated(Menu menu) {
    }

    @Override
    public void onContextMenuClosed(Menu menu, boolean inLoad) {
    }

    // error console

    @Override
    public void setShouldShowErrorConsole(Tab tab, boolean flag) {
        if (tab == null) return;
        ErrorConsoleView errorConsole = tab.getErrorConsole(true);
        if (flag) {
            // Setting the show state of the console will cause it's the layout
            // to be inflated.
            if (errorConsole.numberOfErrors() > 0) {
                errorConsole.showConsole(ErrorConsoleView.SHOW_MINIMIZED);
            } else {
                errorConsole.showConsole(ErrorConsoleView.SHOW_NONE);
            }
            if (errorConsole.getParent() != null) {
                mErrorConsoleContainer.removeView(errorConsole);
            }
            // Now we can add it to the main view.
            mErrorConsoleContainer.addView(errorConsole,
                    new LinearLayout.LayoutParams(
                            ViewGroup.LayoutParams.MATCH_PARENT,
                            ViewGroup.LayoutParams.WRAP_CONTENT));
        } else {
            mErrorConsoleContainer.removeView(errorConsole);
        }
    }

    // -------------------------------------------------------------------------
    // Helper function for WebChromeClient
    // -------------------------------------------------------------------------

    @Override
    public Bitmap getDefaultVideoPoster() {
        if (mDefaultVideoPoster == null) {
            mDefaultVideoPoster = BitmapFactory.decodeResource(
                    mActivity.getResources(), R.drawable.default_video_poster);
        }
        return mDefaultVideoPoster;
    }

    @Override
    public View getVideoLoadingProgressView() {
        if (mVideoProgressView == null) {
            LayoutInflater inflater = LayoutInflater.from(mActivity);
            mVideoProgressView = inflater.inflate(
                    R.layout.video_loading_progress, null);
        }
        return mVideoProgressView;
    }

    @Override
    public void showMaxTabsWarning() {
        Toast warning = Toast.makeText(mActivity,
                mActivity.getString(R.string.max_tabs_warning),
                Toast.LENGTH_SHORT);
        warning.show();
    }

    protected WebView getWebView() {
        if (mActiveTab != null) {
            return mActiveTab.getWebView();
        } else {
            return null;
        }
    }

    public void setFullscreen(boolean enabled) {
        Window win = mActivity.getWindow();
        WindowManager.LayoutParams winParams = win.getAttributes();
        final int bits = WindowManager.LayoutParams.FLAG_FULLSCREEN;
        if (enabled) {
            winParams.flags |=  bits;
        } else {
            winParams.flags &= ~bits;
            if (mCustomView != null) {
                mCustomView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
            } else {
                mContentView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
            }
        }
        win.setAttributes(winParams);
    }

    public Drawable getFaviconDrawable(Bitmap icon) {
        Drawable[] array = new Drawable[3];
        array[0] = new PaintDrawable(Color.BLACK);
        PaintDrawable p = new PaintDrawable(Color.WHITE);
        array[1] = p;
        if (icon == null) {
            array[2] = mGenericFavicon;
        } else {
            array[2] = new BitmapDrawable(icon);
        }
        LayerDrawable d = new LayerDrawable(array);
        d.setLayerInset(1, 1, 1, 1, 1);
        d.setLayerInset(2, 2, 2, 2, 2);
        return d;
    }

    public boolean isLoading() {
        return mActiveTab != null ? mActiveTab.inPageLoad() : false;
    }

    /**
     * Suggest to the UI that the title bar can be hidden. The UI will then
     * decide whether or not to hide based off a number of factors, such
     * as if the user is editing the URL bar or if the page is loading
     */
    public void suggestHideTitleBar() {
        if (!isLoading() && !isEditingUrl() && !mTitleBar.wantsToBeVisible()
                && !mNavigationBar.isMenuShowing()) {
            hideTitleBar();
        }
    }

    protected final void showTitleBarForDuration() {
        showTitleBarForDuration(HIDE_TITLEBAR_DELAY);
    }

    protected final void showTitleBarForDuration(long duration) {
        showTitleBar();
        Message msg = Message.obtain(mHandler, MSG_HIDE_TITLEBAR);
        mHandler.sendMessageDelayed(msg, duration);
    }

    protected Handler mHandler = new Handler() {

        @Override
        public void handleMessage(Message msg) {
            if (msg.what == MSG_HIDE_TITLEBAR) {
                suggestHideTitleBar();
            }
            BaseUi.this.handleMessage(msg);
        }
    };

    protected void handleMessage(Message msg) {}

    @Override
    public void showWeb(boolean animate) {
        mUiController.hideCustomView();
    }

    static class FullscreenHolder extends FrameLayout {

        public FullscreenHolder(Context ctx) {
            super(ctx);
            setBackgroundColor(ctx.getResources().getColor(R.color.black));
        }

        @Override
        public boolean onTouchEvent(MotionEvent evt) {
            return true;
        }

    }

    public void addFixedTitleBar(View view) {
        mFixedTitlebarContainer.addView(view);
    }

    public void setContentViewMarginTop(int margin) {
        LinearLayout.LayoutParams params =
                (LinearLayout.LayoutParams) mContentView.getLayoutParams();
        if (params.topMargin != margin) {
            params.topMargin = margin;
            mContentView.setLayoutParams(params);
        }
    }

    @Override
    public boolean blockFocusAnimations() {
        return mBlockFocusAnimations;
    }

    @Override
    public void onVoiceResult(String result) {
        mNavigationBar.onVoiceResult(result);
    }

    protected UiController getUiController() {
        return mUiController;
    }

    @Override
    public void onActionModeStarted(ActionMode mode) {
        int fixedTbarHeight = mTitleBar.isFixed() ? mTitleBar.calculateEmbeddedHeight() : 0;
        mFixedTitlebarContainer.setY(fixedTbarHeight);
        setContentViewMarginTop(fixedTbarHeight);
    }

    @Override
    public void onActionModeFinished(boolean inLoad) {
        mFixedTitlebarContainer.setY(0);
        setContentViewMarginTop(0);
    }
}