TabBar.java revision b9a051bd9ed974c4d3d29a549bb7e00d8a95c33c 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.browser;
18
19import com.android.browser.BrowserWebView.ScrollListener;
20
21import android.animation.Animator;
22import android.animation.Animator.AnimatorListener;
23import android.animation.AnimatorSet;
24import android.animation.ObjectAnimator;
25import android.app.Activity;
26import android.content.Context;
27import android.content.res.Resources;
28import android.graphics.Bitmap;
29import android.graphics.BitmapShader;
30import android.graphics.Canvas;
31import android.graphics.Matrix;
32import android.graphics.Paint;
33import android.graphics.Path;
34import android.graphics.Shader;
35import android.graphics.drawable.BitmapDrawable;
36import android.graphics.drawable.Drawable;
37import android.graphics.drawable.LayerDrawable;
38import android.graphics.drawable.PaintDrawable;
39import android.view.ContextMenu;
40import android.view.Gravity;
41import android.view.LayoutInflater;
42import android.view.MenuInflater;
43import android.view.View;
44import android.view.View.OnClickListener;
45import android.webkit.WebView;
46import android.widget.ImageButton;
47import android.widget.ImageView;
48import android.widget.LinearLayout;
49import android.widget.TextView;
50
51import java.util.HashMap;
52import java.util.List;
53import java.util.Map;
54
55/**
56 * tabbed title bar for xlarge screen browser
57 */
58public class TabBar extends LinearLayout
59        implements ScrollListener, OnClickListener {
60
61    private static final int PROGRESS_MAX = 100;
62
63    private Activity mActivity;
64    private UiController mUiController;
65    private TabControl mTabControl;
66    private XLargeUi mUi;
67
68    private final int mTabWidthSelected;
69    private final int mTabWidthUnselected;
70
71    private TabScrollView mTabs;
72
73    private ImageButton mNewTab;
74    private int mButtonWidth;
75
76    private Map<Tab, TabView> mTabMap;
77
78    private Drawable mGenericFavicon;
79
80    private int mCurrentTextureWidth = 0;
81    private int mCurrentTextureHeight = 0;
82
83    private Drawable mActiveDrawable;
84    private Drawable mInactiveDrawable;
85
86    private final Paint mActiveShaderPaint = new Paint();
87    private final Paint mInactiveShaderPaint = new Paint();
88    private final Paint mFocusPaint = new Paint();
89    private final Matrix mActiveMatrix = new Matrix();
90    private final Matrix mInactiveMatrix = new Matrix();
91
92    private BitmapShader mActiveShader;
93    private BitmapShader mInactiveShader;
94
95    private int mTabOverlap;
96    private int mAddTabOverlap;
97    private int mTabSliceWidth;
98    private boolean mUseQuickControls;
99
100    public TabBar(Activity activity, UiController controller, XLargeUi ui) {
101        super(activity);
102        mActivity = activity;
103        mUiController = controller;
104        mTabControl = mUiController.getTabControl();
105        mUi = ui;
106        Resources res = activity.getResources();
107        mTabWidthSelected = (int) res.getDimension(R.dimen.tab_width_selected);
108        mTabWidthUnselected = (int) res.getDimension(R.dimen.tab_width_unselected);
109        mActiveDrawable = res.getDrawable(R.drawable.bg_urlbar);
110        mInactiveDrawable = res.getDrawable(R.drawable.browsertab_inactive);
111
112        mTabMap = new HashMap<Tab, TabView>();
113        Resources resources = activity.getResources();
114        LayoutInflater factory = LayoutInflater.from(activity);
115        factory.inflate(R.layout.tab_bar, this);
116        setPadding(0, (int) res.getDimension(R.dimen.tab_padding_top), 0, 0);
117        mTabs = (TabScrollView) findViewById(R.id.tabs);
118        mNewTab = (ImageButton) findViewById(R.id.newtab);
119        mNewTab.setOnClickListener(this);
120        mGenericFavicon = res.getDrawable(R.drawable.app_web_browser_sm);
121
122        updateTabs(mUiController.getTabs());
123        mButtonWidth = -1;
124        // tab dimensions
125        mTabOverlap = (int) res.getDimension(R.dimen.tab_overlap);
126        mAddTabOverlap = (int) res.getDimension(R.dimen.tab_addoverlap);
127        mTabSliceWidth = (int) res.getDimension(R.dimen.tab_slice);
128
129        mActiveShaderPaint.setStyle(Paint.Style.FILL);
130        mActiveShaderPaint.setAntiAlias(true);
131
132        mInactiveShaderPaint.setStyle(Paint.Style.FILL);
133        mInactiveShaderPaint.setAntiAlias(true);
134
135        mFocusPaint.setStyle(Paint.Style.STROKE);
136        mFocusPaint.setStrokeWidth(res.getDimension(R.dimen.tab_focus_stroke));
137        mFocusPaint.setAntiAlias(true);
138        mFocusPaint.setColor(res.getColor(R.color.tabFocusHighlight));
139    }
140
141    void setUseQuickControls(boolean useQuickControls) {
142        mUseQuickControls = useQuickControls;
143        mNewTab.setVisibility(mUseQuickControls ? View.GONE
144                : View.VISIBLE);
145    }
146
147    int getTabCount() {
148        return mTabMap.size();
149    }
150
151    void updateTabs(List<Tab> tabs) {
152        mTabs.clearTabs();
153        mTabMap.clear();
154        for (Tab tab : tabs) {
155            TabView tv = buildTabView(tab);
156            mTabs.addTab(tv);
157        }
158        mTabs.setSelectedTab(mTabControl.getCurrentIndex());
159    }
160
161    @Override
162    protected void onMeasure(int hspec, int vspec) {
163        super.onMeasure(hspec, vspec);
164        int w = getMeasuredWidth();
165        // adjust for new tab overlap
166        if (!mUseQuickControls) {
167            w -= mAddTabOverlap;
168        }
169        setMeasuredDimension(w, getMeasuredHeight());
170    }
171
172    @Override
173    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
174        // use paddingLeft and paddingTop
175        int pl = getPaddingLeft();
176        int pt = getPaddingTop();
177        int sw = mTabs.getMeasuredWidth();
178        int w = right - left - pl;
179        if (mUseQuickControls) {
180            mButtonWidth = 0;
181        } else {
182            mButtonWidth = mNewTab.getMeasuredWidth() - mAddTabOverlap;
183            if (w-sw < mButtonWidth) {
184                sw = w - mButtonWidth;
185            }
186        }
187        mTabs.layout(pl, pt, pl + sw, bottom - top);
188        // adjust for overlap
189        if (!mUseQuickControls) {
190            mNewTab.layout(pl + sw - mAddTabOverlap, pt,
191                    pl + sw + mButtonWidth - mAddTabOverlap, bottom - top);
192        }
193    }
194
195    public void onClick(View view) {
196        if (mNewTab == view) {
197            mUiController.openTabToHomePage();
198        } else if (mTabs.getSelectedTab() == view) {
199            if (mUseQuickControls) {
200                if (mUi.isTitleBarShowing() && !isLoading()) {
201                    mUi.stopEditingUrl();
202                    mUi.hideTitleBar();
203                } else {
204                    mUi.stopWebViewScrolling();
205                    mUi.showTitleBarAndEdit();
206                }
207            } else if (mUi.isTitleBarShowing() && !isLoading()) {
208                mUi.stopEditingUrl();
209                mUi.hideTitleBar();
210            } else {
211                showUrlBar();
212            }
213        } else {
214            int ix = mTabs.getChildIndex(view);
215            if (ix >= 0) {
216                mTabs.setSelectedTab(ix);
217                mUiController.switchToTab(ix);
218            }
219        }
220    }
221
222    private void showUrlBar() {
223        mUi.stopWebViewScrolling();
224        mUi.showTitleBar();
225    }
226
227    void showTitleBarIndicator(boolean show) {
228        Tab tab = mTabControl.getCurrentTab();
229        if (tab != null) {
230            TabView tv = mTabMap.get(tab);
231            if (tv != null) {
232                tv.showIndicator(show);
233            }
234        }
235    }
236
237    boolean showsTitleBarIndicator() {
238        Tab tab = mTabControl.getCurrentTab();
239        if (tab != null) {
240            TabView tv = mTabMap.get(tab);
241            if (tv != null) {
242                return tv.showsIndicator();
243            }
244        }
245        return false;
246    }
247
248    // callback after fake titlebar is shown
249    void onShowTitleBar() {
250        showTitleBarIndicator(false);
251    }
252
253    // callback after fake titlebar is hidden
254    void onHideTitleBar() {
255        Tab tab = mTabControl.getCurrentTab();
256        WebView w = tab.getWebView();
257        if (w != null) {
258            showTitleBarIndicator(w.getVisibleTitleHeight() == 0);
259        }
260    }
261
262    // webview scroll listener
263
264    @Override
265    public void onScroll(int visibleTitleHeight, boolean userInitiated) {
266        if (mUseQuickControls) return;
267        // isLoading is using the current tab, which initially might not be set yet
268        if (mTabControl.getCurrentTab() != null
269                && !isLoading()) {
270            if (visibleTitleHeight == 0) {
271                if (!showsTitleBarIndicator()
272                        && (!mUi.isEditingUrl() || userInitiated)) {
273                    mUi.hideTitleBar();
274                    showTitleBarIndicator(true);
275                }
276            } else {
277                if (showsTitleBarIndicator()) {
278                    showTitleBarIndicator(false);
279                }
280            }
281        }
282    }
283
284    @Override
285    public void createContextMenu(ContextMenu menu) {
286        MenuInflater inflater = mActivity.getMenuInflater();
287        inflater.inflate(R.menu.title_context, menu);
288        mActivity.onCreateContextMenu(menu, this, null);
289    }
290
291    private TabView buildTabView(Tab tab) {
292        TabView tabview = new TabView(mActivity, tab);
293        mTabMap.put(tab, tabview);
294        tabview.setOnClickListener(this);
295        return tabview;
296    }
297
298    private static Bitmap getDrawableAsBitmap(Drawable drawable, int width, int height) {
299        Bitmap b = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
300        Canvas c = new Canvas(b);
301        drawable.setBounds(0, 0, width, height);
302        drawable.draw(c);
303        return b;
304    }
305
306    /**
307     * View used in the tab bar
308     */
309    class TabView extends LinearLayout implements OnClickListener {
310
311        Tab mTab;
312        View mTabContent;
313        TextView mTitle;
314        View mIndicator;
315        View mIncognito;
316        ImageView mIconView;
317        ImageView mLock;
318        ImageView mClose;
319        boolean mSelected;
320        boolean mInLoad;
321        Path mPath;
322        Path mFocusPath;
323        int[] mWindowPos;
324
325        /**
326         * @param context
327         */
328        public TabView(Context context, Tab tab) {
329            super(context);
330            setWillNotDraw(false);
331            mPath = new Path();
332            mFocusPath = new Path();
333            mWindowPos = new int[2];
334            mTab = tab;
335            setGravity(Gravity.CENTER_VERTICAL);
336            setOrientation(LinearLayout.HORIZONTAL);
337            setPadding(mTabOverlap, 0, mTabSliceWidth, 0);
338            LayoutInflater inflater = LayoutInflater.from(getContext());
339            mTabContent = inflater.inflate(R.layout.tab_title, this, true);
340            mTitle = (TextView) mTabContent.findViewById(R.id.title);
341            mIconView = (ImageView) mTabContent.findViewById(R.id.favicon);
342            mLock = (ImageView) mTabContent.findViewById(R.id.lock);
343            mClose = (ImageView) mTabContent.findViewById(R.id.close);
344            mClose.setOnClickListener(this);
345            mIncognito = mTabContent.findViewById(R.id.incognito);
346            mIndicator = mTabContent.findViewById(R.id.chevron);
347            mSelected = false;
348            mInLoad = false;
349            // update the status
350            updateFromTab();
351        }
352
353        void showIndicator(boolean show) {
354            if (mSelected) {
355                mIndicator.setVisibility(show ? View.VISIBLE : View.GONE);
356                LayoutParams lp = (LinearLayout.LayoutParams) getLayoutParams();
357                if (show) {
358                    lp.width = mTabWidthSelected + mIndicator.getWidth();
359                } else {
360                    lp.width = mTabWidthSelected;
361                }
362                lp.height =  LayoutParams.MATCH_PARENT;
363                setLayoutParams(lp);
364            } else {
365                mIndicator.setVisibility(View.GONE);
366            }
367        }
368
369        boolean showsIndicator() {
370            return (mIndicator.getVisibility() == View.VISIBLE);
371        }
372
373        @Override
374        public void onClick(View v) {
375            if (v == mClose) {
376                closeTab();
377            }
378        }
379
380        private void updateFromTab() {
381            String displayTitle = mTab.getTitle();
382            if (displayTitle == null) {
383                displayTitle = mTab.getUrl();
384            }
385            setDisplayTitle(displayTitle);
386            setProgress(mTab.getLoadProgress());
387            if (mTab.getFavicon() != null) {
388                setFavicon(renderFavicon(mTab.getFavicon()));
389            }
390            if (mTab != null) {
391                mIncognito.setVisibility(
392                        mTab.isPrivateBrowsingEnabled() ?
393                        View.VISIBLE : View.GONE);
394            }
395        }
396
397        @Override
398        public void setActivated(boolean selected) {
399            mSelected = selected;
400            mClose.setVisibility(mSelected ? View.VISIBLE : View.GONE);
401            mIndicator.setVisibility(View.GONE);
402            mTitle.setTextAppearance(mActivity, mSelected ?
403                    R.style.TabTitleSelected : R.style.TabTitleUnselected);
404            setHorizontalFadingEdgeEnabled(!mSelected);
405            super.setActivated(selected);
406            LayoutParams lp = (LinearLayout.LayoutParams) getLayoutParams();
407            lp.width = selected ? mTabWidthSelected : mTabWidthUnselected;
408            lp.height =  LayoutParams.MATCH_PARENT;
409            setLayoutParams(lp);
410            setFocusable(!selected);
411            postInvalidate();
412        }
413
414        void setDisplayTitle(String title) {
415            mTitle.setText(title);
416        }
417
418        void setFavicon(Drawable d) {
419            mIconView.setImageDrawable(d);
420        }
421
422        void setLock(Drawable d) {
423            if (null == d) {
424                mLock.setVisibility(View.GONE);
425            } else {
426                mLock.setImageDrawable(d);
427                mLock.setVisibility(View.VISIBLE);
428            }
429        }
430
431        void setProgress(int newProgress) {
432            if (newProgress >= PROGRESS_MAX) {
433                mInLoad = false;
434            } else {
435                if (!mInLoad && getWindowToken() != null) {
436                    mInLoad = true;
437                }
438            }
439        }
440
441        private void closeTab() {
442            if (mTab == mTabControl.getCurrentTab()) {
443                mUiController.closeCurrentTab();
444            } else {
445                mUiController.closeTab(mTab);
446            }
447        }
448
449        @Override
450        protected void onLayout(boolean changed, int l, int t, int r, int b) {
451            super.onLayout(changed, l, t, r, b);
452            setTabPath(mPath, 0, 0, r - l, b - t);
453            setFocusPath(mFocusPath, 0, 0, r - l, b - t);
454        }
455
456        @Override
457        protected void dispatchDraw(Canvas canvas) {
458            if (mCurrentTextureWidth != mUi.getContentWidth() ||
459                    mCurrentTextureHeight != getHeight()) {
460                mCurrentTextureWidth = mUi.getContentWidth();
461                mCurrentTextureHeight = getHeight();
462
463                if (mCurrentTextureWidth > 0 && mCurrentTextureHeight > 0) {
464                    Bitmap activeTexture = getDrawableAsBitmap(mActiveDrawable,
465                            mCurrentTextureWidth, mCurrentTextureHeight);
466                    Bitmap inactiveTexture = getDrawableAsBitmap(mInactiveDrawable,
467                            mCurrentTextureWidth, mCurrentTextureHeight);
468
469                    mActiveShader = new BitmapShader(activeTexture,
470                            Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
471                    mActiveShaderPaint.setShader(mActiveShader);
472
473                    mInactiveShader = new BitmapShader(inactiveTexture,
474                            Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
475                    mInactiveShaderPaint.setShader(mInactiveShader);
476                }
477            }
478            // add some monkey protection
479            if ((mActiveShader != null) && (mInactiveShader != null)) {
480                int state = canvas.save();
481                getLocationInWindow(mWindowPos);
482                Paint paint = mSelected ? mActiveShaderPaint : mInactiveShaderPaint;
483                drawClipped(canvas, paint, mPath, mWindowPos[0]);
484                canvas.restoreToCount(state);
485            }
486            super.dispatchDraw(canvas);
487        }
488
489        private void drawClipped(Canvas canvas, Paint paint, Path clipPath, int left) {
490            // TODO: We should change the matrix/shader only when needed
491            final Matrix matrix = mSelected ? mActiveMatrix : mInactiveMatrix;
492            matrix.setTranslate(-left, 0.0f);
493            (mSelected ? mActiveShader : mInactiveShader).setLocalMatrix(matrix);
494            canvas.drawPath(clipPath, paint);
495            if (isFocused()) {
496                canvas.drawPath(mFocusPath, mFocusPaint);
497            }
498        }
499
500        private void setTabPath(Path path, int l, int t, int r, int b) {
501            path.reset();
502            path.moveTo(l, b);
503            path.lineTo(l, t);
504            path.lineTo(r - mTabSliceWidth, t);
505            path.lineTo(r, b);
506            path.close();
507        }
508
509        private void setFocusPath(Path path, int l, int t, int r, int b) {
510            path.reset();
511            path.moveTo(l, b);
512            path.lineTo(l, t);
513            path.lineTo(r - mTabSliceWidth, t);
514            path.lineTo(r, b);
515        }
516
517    }
518
519    static Drawable createFaviconBackground(Context context) {
520        PaintDrawable faviconBackground = new PaintDrawable();
521        Resources res = context.getResources();
522        faviconBackground.getPaint().setColor(context.getResources()
523                .getColor(R.color.tabFaviconBackground));
524        faviconBackground.setCornerRadius(
525                res.getDimension(R.dimen.tab_favicon_corner_radius));
526        return faviconBackground;
527    }
528
529    private Drawable renderFavicon(Bitmap icon) {
530        Drawable[] array = new Drawable[2];
531        array[0] = createFaviconBackground(getContext());
532        if (icon == null) {
533            array[1] = mGenericFavicon;
534        } else {
535            array[1] = new BitmapDrawable(icon);
536        }
537        LayerDrawable d = new LayerDrawable(array);
538        d.setLayerInset(1, 2, 2, 2, 2);
539        return d;
540    }
541
542    private void animateTabOut(final Tab tab, final TabView tv) {
543        ObjectAnimator scalex = ObjectAnimator.ofFloat(tv, "scaleX", 1.0f, 0.0f);
544        ObjectAnimator scaley = ObjectAnimator.ofFloat(tv, "scaleY", 1.0f, 0.0f);
545        ObjectAnimator alpha = ObjectAnimator.ofFloat(tv, "alpha", 1.0f, 0.0f);
546        AnimatorSet animator = new AnimatorSet();
547        animator.playTogether(scalex, scaley, alpha);
548        animator.setDuration(150);
549        animator.addListener(new AnimatorListener() {
550
551            @Override
552            public void onAnimationCancel(Animator animation) {
553            }
554
555            @Override
556            public void onAnimationEnd(Animator animation) {
557                mTabs.removeTab(tv);
558                mTabMap.remove(tab);
559                mUi.onRemoveTabCompleted(tab);
560            }
561
562            @Override
563            public void onAnimationRepeat(Animator animation) {
564            }
565
566            @Override
567            public void onAnimationStart(Animator animation) {
568            }
569
570        });
571        animator.start();
572    }
573
574    private void animateTabIn(final Tab tab, final TabView tv) {
575        ObjectAnimator scalex = ObjectAnimator.ofFloat(tv, "scaleX", 0.0f, 1.0f);
576        scalex.setDuration(150);
577        scalex.addListener(new AnimatorListener() {
578
579            @Override
580            public void onAnimationCancel(Animator animation) {
581            }
582
583            @Override
584            public void onAnimationEnd(Animator animation) {
585                mUi.onAddTabCompleted(tab);
586            }
587
588            @Override
589            public void onAnimationRepeat(Animator animation) {
590            }
591
592            @Override
593            public void onAnimationStart(Animator animation) {
594                mTabs.addTab(tv);
595            }
596
597        });
598        scalex.start();
599    }
600
601    // TabChangeListener implementation
602
603    public void onSetActiveTab(Tab tab) {
604        mTabs.setSelectedTab(mTabControl.getTabIndex(tab));
605        TabView tv = mTabMap.get(tab);
606        if (tv != null) {
607            tv.setProgress(tv.mTab.getLoadProgress());
608            // update the scroll state
609            WebView webview = tab.getWebView();
610            if (webview != null) {
611                int h = webview.getVisibleTitleHeight();
612                onScroll(h, true);
613            }
614        }
615    }
616
617    public void onFavicon(Tab tab, Bitmap favicon) {
618        TabView tv = mTabMap.get(tab);
619        if (tv != null) {
620            tv.setFavicon(renderFavicon(favicon));
621        }
622    }
623
624    public void onNewTab(Tab tab) {
625        TabView tv = buildTabView(tab);
626        animateTabIn(tab, tv);
627    }
628
629    public void onProgress(Tab tab, int progress) {
630        TabView tv = mTabMap.get(tab);
631        if (tv != null) {
632            tv.setProgress(progress);
633        }
634    }
635
636    public void onRemoveTab(Tab tab) {
637        TabView tv = mTabMap.get(tab);
638        if (tv != null) {
639            animateTabOut(tab, tv);
640        } else {
641            mTabMap.remove(tab);
642        }
643    }
644
645    public void onUrlAndTitle(Tab tab, String url, String title) {
646        TabView tv = mTabMap.get(tab);
647        if (tv != null) {
648            if (title != null) {
649                tv.setDisplayTitle(title);
650            } else if (url != null) {
651                tv.setDisplayTitle(UrlUtils.stripUrl(url));
652            }
653        }
654    }
655
656    private boolean isLoading() {
657        TabView tv = mTabMap.get(mTabControl.getCurrentTab());
658        if (tv != null) {
659            return tv.mInLoad;
660        } else {
661            return false;
662        }
663    }
664
665}
666