src/com/android/browser/TabBar.java - platform/packages/apps/Browser - Git at Google

 /*
  * 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.animation.Animator;
 import android.animation.Animator.AnimatorListener;
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.app.Activity;
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
 import android.graphics.BitmapShader;
 import android.graphics.Canvas;
 import android.graphics.Matrix;
 import android.graphics.Paint;
 import android.graphics.Path;
 import android.graphics.Shader;
 import android.graphics.drawable.Drawable;
 import android.view.Gravity;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;

 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;

 /**
  * tabbed title bar for xlarge screen browser
  */
 public class TabBar extends LinearLayout implements OnClickListener {

     private static final int PROGRESS_MAX = 100;

     private Activity mActivity;
     private UiController mUiController;
     private TabControl mTabControl;
     private XLargeUi mUi;

     private int mTabWidth;

     private TabScrollView mTabs;

     private ImageButton mNewTab;
     private int mButtonWidth;

     private Map<Tab, TabView> mTabMap;

     private int mCurrentTextureWidth = 0;
     private int mCurrentTextureHeight = 0;

     private Drawable mActiveDrawable;
     private Drawable mInactiveDrawable;

     private final Paint mActiveShaderPaint = new Paint();
     private final Paint mInactiveShaderPaint = new Paint();
     private final Paint mFocusPaint = new Paint();
     private final Matrix mActiveMatrix = new Matrix();
     private final Matrix mInactiveMatrix = new Matrix();

     private BitmapShader mActiveShader;
     private BitmapShader mInactiveShader;

     private int mTabOverlap;
     private int mAddTabOverlap;
     private int mTabSliceWidth;
     private boolean mUseQuickControls;

     public TabBar(Activity activity, UiController controller, XLargeUi ui) {
         super(activity);
         mActivity = activity;
         mUiController = controller;
         mTabControl = mUiController.getTabControl();
         mUi = ui;
         Resources res = activity.getResources();
         mTabWidth = (int) res.getDimension(R.dimen.tab_width);
         mActiveDrawable = res.getDrawable(R.drawable.bg_urlbar);
         mInactiveDrawable = res.getDrawable(R.drawable.browsertab_inactive);

         mTabMap = new HashMap<Tab, TabView>();
         LayoutInflater factory = LayoutInflater.from(activity);
         factory.inflate(R.layout.tab_bar, this);
         setPadding(0, (int) res.getDimension(R.dimen.tab_padding_top), 0, 0);
         mTabs = (TabScrollView) findViewById(R.id.tabs);
         mNewTab = (ImageButton) findViewById(R.id.newtab);
         mNewTab.setOnClickListener(this);

         updateTabs(mUiController.getTabs());
         mButtonWidth = -1;
         // tab dimensions
         mTabOverlap = (int) res.getDimension(R.dimen.tab_overlap);
         mAddTabOverlap = (int) res.getDimension(R.dimen.tab_addoverlap);
         mTabSliceWidth = (int) res.getDimension(R.dimen.tab_slice);

         mActiveShaderPaint.setStyle(Paint.Style.FILL);
         mActiveShaderPaint.setAntiAlias(true);

         mInactiveShaderPaint.setStyle(Paint.Style.FILL);
         mInactiveShaderPaint.setAntiAlias(true);

         mFocusPaint.setStyle(Paint.Style.STROKE);
         mFocusPaint.setStrokeWidth(res.getDimension(R.dimen.tab_focus_stroke));
         mFocusPaint.setAntiAlias(true);
         mFocusPaint.setColor(res.getColor(R.color.tabFocusHighlight));
     }

     @Override
     public void onConfigurationChanged(Configuration config) {
         super.onConfigurationChanged(config);
         Resources res = mActivity.getResources();
         mTabWidth = (int) res.getDimension(R.dimen.tab_width);
         // force update of tab bar
         mTabs.updateLayout();
     }

     void setUseQuickControls(boolean useQuickControls) {
         mUseQuickControls = useQuickControls;
         mNewTab.setVisibility(mUseQuickControls ? View.GONE
                 : View.VISIBLE);
     }

     int getTabCount() {
         return mTabMap.size();
     }

     void updateTabs(List<Tab> tabs) {
         mTabs.clearTabs();
         mTabMap.clear();
         for (Tab tab : tabs) {
             TabView tv = buildTabView(tab);
             mTabs.addTab(tv);
         }
         mTabs.setSelectedTab(mTabControl.getCurrentPosition());
     }

     @Override
     protected void onMeasure(int hspec, int vspec) {
         super.onMeasure(hspec, vspec);
         int w = getMeasuredWidth();
         // adjust for new tab overlap
         if (!mUseQuickControls) {
             w -= mAddTabOverlap;
         }
         setMeasuredDimension(w, getMeasuredHeight());
     }

     @Override
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
         // use paddingLeft and paddingTop
         int pl = getPaddingLeft();
         int pt = getPaddingTop();
         int sw = mTabs.getMeasuredWidth();
         int w = right - left - pl;
         if (mUseQuickControls) {
             mButtonWidth = 0;
         } else {
             mButtonWidth = mNewTab.getMeasuredWidth() - mAddTabOverlap;
             if (w-sw < mButtonWidth) {
                 sw = w - mButtonWidth;
             }
         }
         mTabs.layout(pl, pt, pl + sw, bottom - top);
         // adjust for overlap
         if (!mUseQuickControls) {
             mNewTab.layout(pl + sw - mAddTabOverlap, pt,
                     pl + sw + mButtonWidth - mAddTabOverlap, bottom - top);
         }
     }

     public void onClick(View view) {
         if (mNewTab == view) {
             mUiController.openTabToHomePage();
         } else if (mTabs.getSelectedTab() == view) {
             if (mUseQuickControls) {
                 if (mUi.isTitleBarShowing() && !isLoading()) {
                     mUi.stopEditingUrl();
                     mUi.hideTitleBar();
                 } else {
                     mUi.stopWebViewScrolling();
                     mUi.editUrl(false, false);
                 }
             } else if (mUi.isTitleBarShowing() && !isLoading()) {
                 mUi.stopEditingUrl();
                 mUi.hideTitleBar();
             } else {
                 showUrlBar();
             }
         } else if (view instanceof TabView) {
             final Tab tab = ((TabView) view).mTab;
             int ix = mTabs.getChildIndex(view);
             if (ix >= 0) {
                 mTabs.setSelectedTab(ix);
                 mUiController.switchToTab(tab);
             }
         }
     }

     private void showUrlBar() {
         mUi.stopWebViewScrolling();
         mUi.showTitleBar();
     }

     private TabView buildTabView(Tab tab) {
         TabView tabview = new TabView(mActivity, tab);
         mTabMap.put(tab, tabview);
         tabview.setOnClickListener(this);
         return tabview;
     }

     private static Bitmap getDrawableAsBitmap(Drawable drawable, int width, int height) {
         Bitmap b = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
         Canvas c = new Canvas(b);
         drawable.setBounds(0, 0, width, height);
         drawable.draw(c);
         c.setBitmap(null);
         return b;
     }

     /**
      * View used in the tab bar
      */
     class TabView extends LinearLayout implements OnClickListener {

         Tab mTab;
         View mTabContent;
         TextView mTitle;
         View mIncognito;
         View mSnapshot;
         ImageView mIconView;
         ImageView mLock;
         ImageView mClose;
         boolean mSelected;
         Path mPath;
         Path mFocusPath;
         int[] mWindowPos;

         /**
          * @param context
          */
         public TabView(Context context, Tab tab) {
             super(context);
             setWillNotDraw(false);
             mPath = new Path();
             mFocusPath = new Path();
             mWindowPos = new int[2];
             mTab = tab;
             setGravity(Gravity.CENTER_VERTICAL);
             setOrientation(LinearLayout.HORIZONTAL);
             setPadding(mTabOverlap, 0, mTabSliceWidth, 0);
             LayoutInflater inflater = LayoutInflater.from(getContext());
             mTabContent = inflater.inflate(R.layout.tab_title, this, true);
             mTitle = (TextView) mTabContent.findViewById(R.id.title);
             mIconView = (ImageView) mTabContent.findViewById(R.id.favicon);
             mLock = (ImageView) mTabContent.findViewById(R.id.lock);
             mClose = (ImageView) mTabContent.findViewById(R.id.close);
             mClose.setOnClickListener(this);
             mIncognito = mTabContent.findViewById(R.id.incognito);
             mSnapshot = mTabContent.findViewById(R.id.snapshot);
             mSelected = false;
             // update the status
             updateFromTab();
         }

         @Override
         public void onClick(View v) {
             if (v == mClose) {
                 closeTab();
             }
         }

         private void updateFromTab() {
             String displayTitle = mTab.getTitle();
             if (displayTitle == null) {
                 displayTitle = mTab.getUrl();
             }
             setDisplayTitle(displayTitle);
             if (mTab.getFavicon() != null) {
                 setFavicon(mUi.getFaviconDrawable(mTab.getFavicon()));
             }
             updateTabIcons();
         }

         private void updateTabIcons() {
             mIncognito.setVisibility(
                     mTab.isPrivateBrowsingEnabled() ?
                     View.VISIBLE : View.GONE);
             mSnapshot.setVisibility(mTab.isSnapshot()
                     ? View.VISIBLE : View.GONE);
         }

         @Override
         public void setActivated(boolean selected) {
             mSelected = selected;
             mClose.setVisibility(mSelected ? View.VISIBLE : View.GONE);
             mIconView.setVisibility(mSelected ? View.GONE : View.VISIBLE);
             mTitle.setTextAppearance(mActivity, mSelected ?
                     R.style.TabTitleSelected : R.style.TabTitleUnselected);
             setHorizontalFadingEdgeEnabled(!mSelected);
             super.setActivated(selected);
             updateLayoutParams();
             setFocusable(!selected);
             postInvalidate();
         }

         public void updateLayoutParams() {
             LayoutParams lp = (LinearLayout.LayoutParams) getLayoutParams();
             lp.width = mTabWidth;
             lp.height =  LayoutParams.MATCH_PARENT;
             setLayoutParams(lp);
         }

         void setDisplayTitle(String title) {
             mTitle.setText(title);
         }

         void setFavicon(Drawable d) {
             mIconView.setImageDrawable(d);
         }

         void setLock(Drawable d) {
             if (null == d) {
                 mLock.setVisibility(View.GONE);
             } else {
                 mLock.setImageDrawable(d);
                 mLock.setVisibility(View.VISIBLE);
             }
         }

         private void closeTab() {
             if (mTab == mTabControl.getCurrentTab()) {
                 mUiController.closeCurrentTab();
             } else {
                 mUiController.closeTab(mTab);
             }
         }

         @Override
         protected void onLayout(boolean changed, int l, int t, int r, int b) {
             super.onLayout(changed, l, t, r, b);
             setTabPath(mPath, 0, 0, r - l, b - t);
             setFocusPath(mFocusPath, 0, 0, r - l, b - t);
         }

         @Override
         protected void dispatchDraw(Canvas canvas) {
             if (mCurrentTextureWidth != mUi.getContentWidth() ||
                     mCurrentTextureHeight != getHeight()) {
                 mCurrentTextureWidth = mUi.getContentWidth();
                 mCurrentTextureHeight = getHeight();

                 if (mCurrentTextureWidth > 0 && mCurrentTextureHeight > 0) {
                     Bitmap activeTexture = getDrawableAsBitmap(mActiveDrawable,
                             mCurrentTextureWidth, mCurrentTextureHeight);
                     Bitmap inactiveTexture = getDrawableAsBitmap(mInactiveDrawable,
                             mCurrentTextureWidth, mCurrentTextureHeight);

                     mActiveShader = new BitmapShader(activeTexture,
                             Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
                     mActiveShaderPaint.setShader(mActiveShader);

                     mInactiveShader = new BitmapShader(inactiveTexture,
                             Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
                     mInactiveShaderPaint.setShader(mInactiveShader);
                 }
             }
             // add some monkey protection
             if ((mActiveShader != null) && (mInactiveShader != null)) {
                 int state = canvas.save();
                 getLocationInWindow(mWindowPos);
                 Paint paint = mSelected ? mActiveShaderPaint : mInactiveShaderPaint;
                 drawClipped(canvas, paint, mPath, mWindowPos[0]);
                 canvas.restoreToCount(state);
             }
             super.dispatchDraw(canvas);
         }

         private void drawClipped(Canvas canvas, Paint paint, Path clipPath, int left) {
             // TODO: We should change the matrix/shader only when needed
             final Matrix matrix = mSelected ? mActiveMatrix : mInactiveMatrix;
             matrix.setTranslate(-left, 0.0f);
             (mSelected ? mActiveShader : mInactiveShader).setLocalMatrix(matrix);
             canvas.drawPath(clipPath, paint);
             if (isFocused()) {
                 canvas.drawPath(mFocusPath, mFocusPaint);
             }
         }

         private void setTabPath(Path path, int l, int t, int r, int b) {
             path.reset();
             path.moveTo(l, b);
             path.lineTo(l, t);
             path.lineTo(r - mTabSliceWidth, t);
             path.lineTo(r, b);
             path.close();
         }

         private void setFocusPath(Path path, int l, int t, int r, int b) {
             path.reset();
             path.moveTo(l, b);
             path.lineTo(l, t);
             path.lineTo(r - mTabSliceWidth, t);
             path.lineTo(r, b);
         }

     }

     private void animateTabOut(final Tab tab, final TabView tv) {
         ObjectAnimator scalex = ObjectAnimator.ofFloat(tv, "scaleX", 1.0f, 0.0f);
         ObjectAnimator scaley = ObjectAnimator.ofFloat(tv, "scaleY", 1.0f, 0.0f);
         ObjectAnimator alpha = ObjectAnimator.ofFloat(tv, "alpha", 1.0f, 0.0f);
         AnimatorSet animator = new AnimatorSet();
         animator.playTogether(scalex, scaley, alpha);
         animator.setDuration(150);
         animator.addListener(new AnimatorListener() {

             @Override
             public void onAnimationCancel(Animator animation) {
             }

             @Override
             public void onAnimationEnd(Animator animation) {
                 mTabs.removeTab(tv);
                 mTabMap.remove(tab);
                 mUi.onRemoveTabCompleted(tab);
             }

             @Override
             public void onAnimationRepeat(Animator animation) {
             }

             @Override
             public void onAnimationStart(Animator animation) {
             }

         });
         animator.start();
     }

     private void animateTabIn(final Tab tab, final TabView tv) {
         ObjectAnimator scalex = ObjectAnimator.ofFloat(tv, "scaleX", 0.0f, 1.0f);
         scalex.setDuration(150);
         scalex.addListener(new AnimatorListener() {

             @Override
             public void onAnimationCancel(Animator animation) {
             }

             @Override
             public void onAnimationEnd(Animator animation) {
                 mUi.onAddTabCompleted(tab);
             }

             @Override
             public void onAnimationRepeat(Animator animation) {
             }

             @Override
             public void onAnimationStart(Animator animation) {
                 mTabs.addTab(tv);
             }

         });
         scalex.start();
     }

     // TabChangeListener implementation

     public void onSetActiveTab(Tab tab) {
         mTabs.setSelectedTab(mTabControl.getTabPosition(tab));
     }

     public void onFavicon(Tab tab, Bitmap favicon) {
         TabView tv = mTabMap.get(tab);
         if (tv != null) {
             tv.setFavicon(mUi.getFaviconDrawable(favicon));
         }
     }

     public void onNewTab(Tab tab) {
         TabView tv = buildTabView(tab);
         animateTabIn(tab, tv);
     }

     public void onRemoveTab(Tab tab) {
         TabView tv = mTabMap.get(tab);
         if (tv != null) {
             animateTabOut(tab, tv);
         } else {
             mTabMap.remove(tab);
         }
     }

     public void onUrlAndTitle(Tab tab, String url, String title) {
         TabView tv = mTabMap.get(tab);
         if (tv != null) {
             if (title != null) {
                 tv.setDisplayTitle(title);
             } else if (url != null) {
                 tv.setDisplayTitle(UrlUtils.stripUrl(url));
             }
             tv.updateTabIcons();
         }
     }

     private boolean isLoading() {
         Tab tab = mTabControl.getCurrentTab();
         if (tab != null) {
             return tab.inPageLoad();
         } else {
             return false;
         }
     }

 }
	/*
	* 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.animation.Animator;
	import android.animation.Animator.AnimatorListener;
	import android.animation.AnimatorSet;
	import android.animation.ObjectAnimator;
	import android.app.Activity;
	import android.content.Context;
	import android.content.res.Configuration;
	import android.content.res.Resources;
	import android.graphics.Bitmap;
	import android.graphics.BitmapShader;
	import android.graphics.Canvas;
	import android.graphics.Matrix;
	import android.graphics.Paint;
	import android.graphics.Path;
	import android.graphics.Shader;
	import android.graphics.drawable.Drawable;
	import android.view.Gravity;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.View.OnClickListener;
	import android.widget.ImageButton;
	import android.widget.ImageView;
	import android.widget.LinearLayout;
	import android.widget.TextView;

	import java.util.HashMap;
	import java.util.List;
	import java.util.Map;

	/**
	* tabbed title bar for xlarge screen browser
	*/
	public class TabBar extends LinearLayout implements OnClickListener {

	private static final int PROGRESS_MAX = 100;

	private Activity mActivity;
	private UiController mUiController;
	private TabControl mTabControl;
	private XLargeUi mUi;

	private int mTabWidth;

	private TabScrollView mTabs;

	private ImageButton mNewTab;
	private int mButtonWidth;

	private Map<Tab, TabView> mTabMap;

	private int mCurrentTextureWidth = 0;
	private int mCurrentTextureHeight = 0;

	private Drawable mActiveDrawable;
	private Drawable mInactiveDrawable;

	private final Paint mActiveShaderPaint = new Paint();
	private final Paint mInactiveShaderPaint = new Paint();
	private final Paint mFocusPaint = new Paint();
	private final Matrix mActiveMatrix = new Matrix();
	private final Matrix mInactiveMatrix = new Matrix();

	private BitmapShader mActiveShader;
	private BitmapShader mInactiveShader;

	private int mTabOverlap;
	private int mAddTabOverlap;
	private int mTabSliceWidth;
	private boolean mUseQuickControls;

	public TabBar(Activity activity, UiController controller, XLargeUi ui) {
	super(activity);
	mActivity = activity;
	mUiController = controller;
	mTabControl = mUiController.getTabControl();
	mUi = ui;
	Resources res = activity.getResources();
	mTabWidth = (int) res.getDimension(R.dimen.tab_width);
	mActiveDrawable = res.getDrawable(R.drawable.bg_urlbar);
	mInactiveDrawable = res.getDrawable(R.drawable.browsertab_inactive);

	mTabMap = new HashMap<Tab, TabView>();
	LayoutInflater factory = LayoutInflater.from(activity);
	factory.inflate(R.layout.tab_bar, this);
	setPadding(0, (int) res.getDimension(R.dimen.tab_padding_top), 0, 0);
	mTabs = (TabScrollView) findViewById(R.id.tabs);
	mNewTab = (ImageButton) findViewById(R.id.newtab);
	mNewTab.setOnClickListener(this);

	updateTabs(mUiController.getTabs());
	mButtonWidth = -1;
	// tab dimensions
	mTabOverlap = (int) res.getDimension(R.dimen.tab_overlap);
	mAddTabOverlap = (int) res.getDimension(R.dimen.tab_addoverlap);
	mTabSliceWidth = (int) res.getDimension(R.dimen.tab_slice);

	mActiveShaderPaint.setStyle(Paint.Style.FILL);
	mActiveShaderPaint.setAntiAlias(true);

	mInactiveShaderPaint.setStyle(Paint.Style.FILL);
	mInactiveShaderPaint.setAntiAlias(true);

	mFocusPaint.setStyle(Paint.Style.STROKE);
	mFocusPaint.setStrokeWidth(res.getDimension(R.dimen.tab_focus_stroke));
	mFocusPaint.setAntiAlias(true);
	mFocusPaint.setColor(res.getColor(R.color.tabFocusHighlight));
	}

	@Override
	public void onConfigurationChanged(Configuration config) {
	super.onConfigurationChanged(config);
	Resources res = mActivity.getResources();
	mTabWidth = (int) res.getDimension(R.dimen.tab_width);
	// force update of tab bar
	mTabs.updateLayout();
	}

	void setUseQuickControls(boolean useQuickControls) {
	mUseQuickControls = useQuickControls;
	mNewTab.setVisibility(mUseQuickControls ? View.GONE
	: View.VISIBLE);
	}

	int getTabCount() {
	return mTabMap.size();
	}

	void updateTabs(List<Tab> tabs) {
	mTabs.clearTabs();
	mTabMap.clear();
	for (Tab tab : tabs) {
	TabView tv = buildTabView(tab);
	mTabs.addTab(tv);
	}
	mTabs.setSelectedTab(mTabControl.getCurrentPosition());
	}

	@Override
	protected void onMeasure(int hspec, int vspec) {
	super.onMeasure(hspec, vspec);
	int w = getMeasuredWidth();
	// adjust for new tab overlap
	if (!mUseQuickControls) {
	w -= mAddTabOverlap;
	}
	setMeasuredDimension(w, getMeasuredHeight());
	}

	@Override
	protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
	// use paddingLeft and paddingTop
	int pl = getPaddingLeft();
	int pt = getPaddingTop();
	int sw = mTabs.getMeasuredWidth();
	int w = right - left - pl;
	if (mUseQuickControls) {
	mButtonWidth = 0;
	} else {
	mButtonWidth = mNewTab.getMeasuredWidth() - mAddTabOverlap;
	if (w-sw < mButtonWidth) {
	sw = w - mButtonWidth;
	}
	}
	mTabs.layout(pl, pt, pl + sw, bottom - top);
	// adjust for overlap
	if (!mUseQuickControls) {
	mNewTab.layout(pl + sw - mAddTabOverlap, pt,
	pl + sw + mButtonWidth - mAddTabOverlap, bottom - top);
	}
	}

	public void onClick(View view) {
	if (mNewTab == view) {
	mUiController.openTabToHomePage();
	} else if (mTabs.getSelectedTab() == view) {
	if (mUseQuickControls) {
	if (mUi.isTitleBarShowing() && !isLoading()) {
	mUi.stopEditingUrl();
	mUi.hideTitleBar();
	} else {
	mUi.stopWebViewScrolling();
	mUi.editUrl(false, false);
	}
	} else if (mUi.isTitleBarShowing() && !isLoading()) {
	mUi.stopEditingUrl();
	mUi.hideTitleBar();
	} else {
	showUrlBar();
	}
	} else if (view instanceof TabView) {
	final Tab tab = ((TabView) view).mTab;
	int ix = mTabs.getChildIndex(view);
	if (ix >= 0) {
	mTabs.setSelectedTab(ix);
	mUiController.switchToTab(tab);
	}
	}
	}

	private void showUrlBar() {
	mUi.stopWebViewScrolling();
	mUi.showTitleBar();
	}

	private TabView buildTabView(Tab tab) {
	TabView tabview = new TabView(mActivity, tab);
	mTabMap.put(tab, tabview);
	tabview.setOnClickListener(this);
	return tabview;
	}

	private static Bitmap getDrawableAsBitmap(Drawable drawable, int width, int height) {
	Bitmap b = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
	Canvas c = new Canvas(b);
	drawable.setBounds(0, 0, width, height);
	drawable.draw(c);
	c.setBitmap(null);
	return b;
	}

	/**
	* View used in the tab bar
	*/
	class TabView extends LinearLayout implements OnClickListener {

	Tab mTab;
	View mTabContent;
	TextView mTitle;
	View mIncognito;
	View mSnapshot;
	ImageView mIconView;
	ImageView mLock;
	ImageView mClose;
	boolean mSelected;
	Path mPath;
	Path mFocusPath;
	int[] mWindowPos;

	/**
	* @param context
	*/
	public TabView(Context context, Tab tab) {
	super(context);
	setWillNotDraw(false);
	mPath = new Path();
	mFocusPath = new Path();
	mWindowPos = new int[2];
	mTab = tab;
	setGravity(Gravity.CENTER_VERTICAL);
	setOrientation(LinearLayout.HORIZONTAL);
	setPadding(mTabOverlap, 0, mTabSliceWidth, 0);
	LayoutInflater inflater = LayoutInflater.from(getContext());
	mTabContent = inflater.inflate(R.layout.tab_title, this, true);
	mTitle = (TextView) mTabContent.findViewById(R.id.title);
	mIconView = (ImageView) mTabContent.findViewById(R.id.favicon);
	mLock = (ImageView) mTabContent.findViewById(R.id.lock);
	mClose = (ImageView) mTabContent.findViewById(R.id.close);
	mClose.setOnClickListener(this);
	mIncognito = mTabContent.findViewById(R.id.incognito);
	mSnapshot = mTabContent.findViewById(R.id.snapshot);
	mSelected = false;
	// update the status
	updateFromTab();
	}

	@Override
	public void onClick(View v) {
	if (v == mClose) {
	closeTab();
	}
	}

	private void updateFromTab() {
	String displayTitle = mTab.getTitle();
	if (displayTitle == null) {
	displayTitle = mTab.getUrl();
	}
	setDisplayTitle(displayTitle);
	if (mTab.getFavicon() != null) {
	setFavicon(mUi.getFaviconDrawable(mTab.getFavicon()));
	}
	updateTabIcons();
	}

	private void updateTabIcons() {
	mIncognito.setVisibility(
	mTab.isPrivateBrowsingEnabled() ?
	View.VISIBLE : View.GONE);
	mSnapshot.setVisibility(mTab.isSnapshot()
	? View.VISIBLE : View.GONE);
	}

	@Override
	public void setActivated(boolean selected) {
	mSelected = selected;
	mClose.setVisibility(mSelected ? View.VISIBLE : View.GONE);
	mIconView.setVisibility(mSelected ? View.GONE : View.VISIBLE);
	mTitle.setTextAppearance(mActivity, mSelected ?
	R.style.TabTitleSelected : R.style.TabTitleUnselected);
	setHorizontalFadingEdgeEnabled(!mSelected);
	super.setActivated(selected);
	updateLayoutParams();
	setFocusable(!selected);
	postInvalidate();
	}

	public void updateLayoutParams() {
	LayoutParams lp = (LinearLayout.LayoutParams) getLayoutParams();
	lp.width = mTabWidth;
	lp.height = LayoutParams.MATCH_PARENT;
	setLayoutParams(lp);
	}

	void setDisplayTitle(String title) {
	mTitle.setText(title);
	}

	void setFavicon(Drawable d) {
	mIconView.setImageDrawable(d);
	}

	void setLock(Drawable d) {
	if (null == d) {
	mLock.setVisibility(View.GONE);
	} else {
	mLock.setImageDrawable(d);
	mLock.setVisibility(View.VISIBLE);
	}
	}

	private void closeTab() {
	if (mTab == mTabControl.getCurrentTab()) {
	mUiController.closeCurrentTab();
	} else {
	mUiController.closeTab(mTab);
	}
	}

	@Override
	protected void onLayout(boolean changed, int l, int t, int r, int b) {
	super.onLayout(changed, l, t, r, b);
	setTabPath(mPath, 0, 0, r - l, b - t);
	setFocusPath(mFocusPath, 0, 0, r - l, b - t);
	}

	@Override
	protected void dispatchDraw(Canvas canvas) {
	if (mCurrentTextureWidth != mUi.getContentWidth() \|\|
	mCurrentTextureHeight != getHeight()) {
	mCurrentTextureWidth = mUi.getContentWidth();
	mCurrentTextureHeight = getHeight();

	if (mCurrentTextureWidth > 0 && mCurrentTextureHeight > 0) {
	Bitmap activeTexture = getDrawableAsBitmap(mActiveDrawable,
	mCurrentTextureWidth, mCurrentTextureHeight);
	Bitmap inactiveTexture = getDrawableAsBitmap(mInactiveDrawable,
	mCurrentTextureWidth, mCurrentTextureHeight);

	mActiveShader = new BitmapShader(activeTexture,
	Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
	mActiveShaderPaint.setShader(mActiveShader);

	mInactiveShader = new BitmapShader(inactiveTexture,
	Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
	mInactiveShaderPaint.setShader(mInactiveShader);
	}
	}
	// add some monkey protection
	if ((mActiveShader != null) && (mInactiveShader != null)) {
	int state = canvas.save();
	getLocationInWindow(mWindowPos);
	Paint paint = mSelected ? mActiveShaderPaint : mInactiveShaderPaint;
	drawClipped(canvas, paint, mPath, mWindowPos[0]);
	canvas.restoreToCount(state);
	}
	super.dispatchDraw(canvas);
	}

	private void drawClipped(Canvas canvas, Paint paint, Path clipPath, int left) {
	// TODO: We should change the matrix/shader only when needed
	final Matrix matrix = mSelected ? mActiveMatrix : mInactiveMatrix;
	matrix.setTranslate(-left, 0.0f);
	(mSelected ? mActiveShader : mInactiveShader).setLocalMatrix(matrix);
	canvas.drawPath(clipPath, paint);
	if (isFocused()) {
	canvas.drawPath(mFocusPath, mFocusPaint);
	}
	}

	private void setTabPath(Path path, int l, int t, int r, int b) {
	path.reset();
	path.moveTo(l, b);
	path.lineTo(l, t);
	path.lineTo(r - mTabSliceWidth, t);
	path.lineTo(r, b);
	path.close();
	}

	private void setFocusPath(Path path, int l, int t, int r, int b) {
	path.reset();
	path.moveTo(l, b);
	path.lineTo(l, t);
	path.lineTo(r - mTabSliceWidth, t);
	path.lineTo(r, b);
	}

	}

	private void animateTabOut(final Tab tab, final TabView tv) {
	ObjectAnimator scalex = ObjectAnimator.ofFloat(tv, "scaleX", 1.0f, 0.0f);
	ObjectAnimator scaley = ObjectAnimator.ofFloat(tv, "scaleY", 1.0f, 0.0f);
	ObjectAnimator alpha = ObjectAnimator.ofFloat(tv, "alpha", 1.0f, 0.0f);
	AnimatorSet animator = new AnimatorSet();
	animator.playTogether(scalex, scaley, alpha);
	animator.setDuration(150);
	animator.addListener(new AnimatorListener() {

	@Override
	public void onAnimationCancel(Animator animation) {
	}

	@Override
	public void onAnimationEnd(Animator animation) {
	mTabs.removeTab(tv);
	mTabMap.remove(tab);
	mUi.onRemoveTabCompleted(tab);
	}

	@Override
	public void onAnimationRepeat(Animator animation) {
	}

	@Override
	public void onAnimationStart(Animator animation) {
	}

	});
	animator.start();
	}

	private void animateTabIn(final Tab tab, final TabView tv) {
	ObjectAnimator scalex = ObjectAnimator.ofFloat(tv, "scaleX", 0.0f, 1.0f);
	scalex.setDuration(150);
	scalex.addListener(new AnimatorListener() {

	@Override
	public void onAnimationCancel(Animator animation) {
	}

	@Override
	public void onAnimationEnd(Animator animation) {
	mUi.onAddTabCompleted(tab);
	}

	@Override
	public void onAnimationRepeat(Animator animation) {
	}

	@Override
	public void onAnimationStart(Animator animation) {
	mTabs.addTab(tv);
	}

	});
	scalex.start();
	}

	// TabChangeListener implementation

	public void onSetActiveTab(Tab tab) {
	mTabs.setSelectedTab(mTabControl.getTabPosition(tab));
	}

	public void onFavicon(Tab tab, Bitmap favicon) {
	TabView tv = mTabMap.get(tab);
	if (tv != null) {
	tv.setFavicon(mUi.getFaviconDrawable(favicon));
	}
	}

	public void onNewTab(Tab tab) {
	TabView tv = buildTabView(tab);
	animateTabIn(tab, tv);
	}

	public void onRemoveTab(Tab tab) {
	TabView tv = mTabMap.get(tab);
	if (tv != null) {
	animateTabOut(tab, tv);
	} else {
	mTabMap.remove(tab);
	}
	}

	public void onUrlAndTitle(Tab tab, String url, String title) {
	TabView tv = mTabMap.get(tab);
	if (tv != null) {
	if (title != null) {
	tv.setDisplayTitle(title);
	} else if (url != null) {
	tv.setDisplayTitle(UrlUtils.stripUrl(url));
	}
	tv.updateTabIcons();
	}
	}

	private boolean isLoading() {
	Tab tab = mTabControl.getCurrentTab();
	if (tab != null) {
	return tab.inPageLoad();
	} else {
	return false;
	}
	}

	}