TabBar.java revision e421c2472744ca7d35906f86204790ee97b91ca2 
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.ScrollWebView.ScrollListener;
20import com.android.browser.TabControl.TabChangeListener;
21
22import android.content.Context;
23import android.content.res.Resources;
24import android.graphics.Bitmap;
25import android.graphics.Color;
26import android.graphics.drawable.BitmapDrawable;
27import android.graphics.drawable.Drawable;
28import android.graphics.drawable.LayerDrawable;
29import android.graphics.drawable.PaintDrawable;
30import android.view.ContextMenu;
31import android.view.Gravity;
32import android.view.LayoutInflater;
33import android.view.MenuInflater;
34import android.view.View;
35import android.view.View.OnClickListener;
36import android.webkit.WebView;
37import android.widget.ImageButton;
38import android.widget.ImageView;
39import android.widget.LinearLayout;
40import android.widget.TextView;
41
42import java.util.HashMap;
43import java.util.Map;
44
45/**
46 * tabbed title bar for xlarge screen browser
47 */
48public class TabBar extends LinearLayout
49        implements TabChangeListener, ScrollListener, OnClickListener {
50
51    private static final int PROGRESS_MAX = 100;
52
53    private BrowserActivity mBrowserActivity;
54
55    private final int mTabWidthSelected;
56    private final int mTabWidthUnselected;
57
58    private TitleBarXLarge mTitleBar;
59
60    private TabScrollView mTabs;
61    private TabControl mControl;
62    private ImageButton mNewTab;
63    private int mButtonWidth;
64
65    private Map<Tab, TabViewData> mTabMap;
66
67    private boolean mUserRequestedUrlbar;
68    private boolean mTitleVisible;
69    private boolean mShowUrlMode;
70
71    public TabBar(BrowserActivity context, TabControl tabcontrol, TitleBarXLarge titlebar) {
72        super(context);
73        Resources res = context.getResources();
74        mTabWidthSelected = (int) res.getDimension(R.dimen.tab_width_selected);
75        mTabWidthUnselected = (int) res.getDimension(R.dimen.tab_width_unselected);
76
77        mTitleBar = titlebar;
78        mTitleBar.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
79                LayoutParams.WRAP_CONTENT));
80        mTabMap = new HashMap<Tab, TabViewData>();
81        mBrowserActivity = context;
82        mControl = tabcontrol;
83        Resources resources = context.getResources();
84        LayoutInflater factory = LayoutInflater.from(context);
85        factory.inflate(R.layout.tab_bar, this);
86        mTabs = (TabScrollView) findViewById(R.id.tabs);
87        mNewTab = (ImageButton) findViewById(R.id.newtab);
88        mNewTab.setOnClickListener(this);
89
90        // TODO: Change enabled states based on whether you can go
91        // back/forward.  Probably should be done inside onPageStarted.
92
93        // build tabs
94        int tabcount = mControl.getTabCount();
95        for (int i = 0; i < tabcount; i++) {
96            Tab tab = mControl.getTab(i);
97            TabViewData data = buildTab(tab);
98            TabView tv = buildView(data);
99        }
100        mTabs.setSelectedTab(mControl.getCurrentIndex());
101
102        // register the tab change listener
103        mControl.setOnTabChangeListener(this);
104        mUserRequestedUrlbar = false;
105        mTitleVisible = true;
106        mButtonWidth = -1;
107    }
108
109    @Override
110    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
111        if (mButtonWidth == -1) {
112            mButtonWidth = mNewTab.getMeasuredWidth();
113        }
114        int sw = mTabs.getMeasuredWidth();
115        int w = right-left;
116        if (w-sw < mButtonWidth) {
117            sw = w - mButtonWidth;
118        }
119        mTabs.layout(0, 0, sw, bottom-top );
120        mNewTab.layout(sw, 0, sw+mButtonWidth, bottom-top);
121    }
122
123    public void onClick(View view) {
124        mBrowserActivity.removeComboView();
125        if (mNewTab == view) {
126            mBrowserActivity.openTabToHomePage();
127        } else if (mTabs.getSelectedTab() == view) {
128            if (mBrowserActivity.isFakeTitleBarShowing() && !isLoading()) {
129                mBrowserActivity.hideFakeTitleBar();
130            } else {
131                showUrlBar();
132            }
133        } else {
134            int ix = mTabs.getChildIndex(view);
135            if (ix >= 0) {
136                mTabs.setSelectedTab(ix);
137                mBrowserActivity.switchToTab(ix);
138            }
139        }
140    }
141
142    private void showUrlBar() {
143        mBrowserActivity.stopScrolling();
144        mBrowserActivity.showFakeTitleBar();
145        mUserRequestedUrlbar = true;
146    }
147
148    private void setShowUrlMode(boolean showUrl) {
149        mShowUrlMode = showUrl;
150    }
151
152    // callback after fake titlebar is shown
153    void onShowTitleBar() {
154        setShowUrlMode(false);
155    }
156
157    // callback after fake titlebar is hidden
158    void onHideTitleBar() {
159        setShowUrlMode(!mTitleVisible);
160        Tab tab = mControl.getCurrentTab();
161        tab.getWebView().requestFocus();
162        mUserRequestedUrlbar = false;
163    }
164
165    // webview scroll listener
166
167    @Override
168    public void onScroll(boolean titleVisible) {
169        mTitleVisible = titleVisible;
170        if (!mShowUrlMode && !mTitleVisible && !isLoading()) {
171            if (mUserRequestedUrlbar) {
172                mBrowserActivity.hideFakeTitleBar();
173            } else {
174                setShowUrlMode(true);
175            }
176        } else if (mTitleVisible && !isLoading()) {
177            if (mShowUrlMode) {
178                setShowUrlMode(false);
179            }
180        }
181    }
182
183    @Override
184    public void createContextMenu(ContextMenu menu) {
185        MenuInflater inflater = mBrowserActivity.getMenuInflater();
186        inflater.inflate(R.menu.title_context, menu);
187        mBrowserActivity.onCreateContextMenu(menu, this, null);
188    }
189
190    private TabViewData buildTab(Tab tab) {
191        TabViewData data = new TabViewData(tab);
192        mTabMap.put(tab, data);
193        return data;
194    }
195
196    private TabView buildView(final TabViewData data) {
197        TabView tv = new TabView(mBrowserActivity, data);
198        tv.setTag(data);
199        tv.setOnClickListener(this);
200        mTabs.addTab(tv);
201        return tv;
202    }
203
204    /**
205     * View used in the tab bar
206     */
207    class TabView extends LinearLayout implements OnClickListener {
208
209        TabViewData mTabData;
210        View mTabContent;
211        TextView mTitle;
212        View mIncognito;
213        ImageView mIconView;
214        ImageView mLock;
215        ImageView mClose;
216        boolean mSelected;
217        boolean mInLoad;
218
219        /**
220         * @param context
221         */
222        public TabView(Context context, TabViewData tab) {
223            super(context);
224            mTabData = tab;
225            setGravity(Gravity.CENTER_VERTICAL);
226            setOrientation(LinearLayout.HORIZONTAL);
227            setBackgroundResource(R.drawable.tab_background);
228            LayoutInflater inflater = LayoutInflater.from(mContext);
229            mTabContent = inflater.inflate(R.layout.tab_title, this, true);
230            mTitle = (TextView) mTabContent.findViewById(R.id.title);
231            mIconView = (ImageView) mTabContent.findViewById(R.id.favicon);
232            mLock = (ImageView) mTabContent.findViewById(R.id.lock);
233            mClose = (ImageView) mTabContent.findViewById(R.id.close);
234            mClose.setOnClickListener(this);
235            mIncognito = mTabContent.findViewById(R.id.incognito);
236            mSelected = false;
237            mInLoad = false;
238            // update the status
239            updateFromData();
240        }
241
242        @Override
243        public void onClick(View v) {
244            if (v == mClose) {
245                closeTab();
246            }
247        }
248
249        private void updateFromData() {
250            mTabData.mTabView = this;
251            if (mTabData.mUrl != null) {
252                setDisplayTitle(mTabData.mUrl);
253            }
254            if (mTabData.mTitle != null) {
255                setDisplayTitle(mTabData.mTitle);
256            }
257            setProgress(mTabData.mProgress);
258            if (mTabData.mIcon != null) {
259                setFavicon(mTabData.mIcon);
260            }
261            if (mTabData.mLock != null) {
262                setLock(mTabData.mLock);
263            }
264            if (mTabData.mTab != null) {
265                mIncognito.setVisibility(
266                        mTabData.mTab.getWebView().isPrivateBrowsingEnabled() ?
267                        View.VISIBLE : View.GONE);
268            }
269        }
270
271        @Override
272        public void setActivated(boolean selected) {
273            mSelected = selected;
274            mClose.setVisibility(mSelected ? View.VISIBLE : View.GONE);
275            mTitle.setTextAppearance(mBrowserActivity, mSelected ?
276                    R.style.TabTitleSelected : R.style.TabTitleUnselected);
277            setHorizontalFadingEdgeEnabled(!mSelected);
278            setFadingEdgeLength(50);
279            super.setActivated(selected);
280            setLayoutParams(new LayoutParams(selected ?
281                    mTabWidthSelected : mTabWidthUnselected,
282                    LayoutParams.MATCH_PARENT));
283        }
284
285        void setDisplayTitle(String title) {
286            mTitle.setText(title);
287        }
288
289        void setFavicon(Drawable d) {
290            mIconView.setImageDrawable(d);
291        }
292
293        void setLock(Drawable d) {
294            if (null == d) {
295                mLock.setVisibility(View.GONE);
296            } else {
297                mLock.setImageDrawable(d);
298                mLock.setVisibility(View.VISIBLE);
299            }
300        }
301
302        void setTitleCompoundDrawables(Drawable left, Drawable top,
303                Drawable right, Drawable bottom) {
304            mTitle.setCompoundDrawables(left, top, right, bottom);
305        }
306
307        void setProgress(int newProgress) {
308            if (newProgress >= PROGRESS_MAX) {
309                mInLoad = false;
310            } else {
311                if (!mInLoad && getWindowToken() != null) {
312                    mInLoad = true;
313                }
314            }
315        }
316
317        private void closeTab() {
318            if (mTabData.mTab == mControl.getCurrentTab()) {
319                mBrowserActivity.closeCurrentWindow();
320            } else {
321                mBrowserActivity.closeTab(mTabData.mTab);
322            }
323        }
324
325    }
326
327    /**
328     * Store tab state within the title bar
329     */
330    class TabViewData {
331
332        Tab mTab;
333        TabView mTabView;
334        int mProgress;
335        Drawable mIcon;
336        Drawable mLock;
337        String mTitle;
338        String mUrl;
339
340        TabViewData(Tab tab) {
341            mTab = tab;
342        }
343
344        void setUrlAndTitle(String url, String title) {
345            mUrl = url;
346            mTitle = title;
347            if (mTabView != null) {
348                if (title != null) {
349                    mTabView.setDisplayTitle(title);
350                } else if (url != null) {
351                    mTabView.setDisplayTitle(url);
352                }
353            }
354        }
355
356        void setProgress(int newProgress) {
357            mProgress = newProgress;
358            if (mTabView != null) {
359                mTabView.setProgress(mProgress);
360            }
361        }
362
363        void setFavicon(Bitmap icon) {
364            Drawable[] array = new Drawable[3];
365            array[0] = new PaintDrawable(Color.BLACK);
366            array[1] = new PaintDrawable(Color.WHITE);
367            if (icon == null) {
368//                array[2] = mGenericFavicon;
369            } else {
370                array[2] = new BitmapDrawable(icon);
371            }
372            LayerDrawable d = new LayerDrawable(array);
373            d.setLayerInset(1, 1, 1, 1, 1);
374            d.setLayerInset(2, 2, 2, 2, 2);
375            mIcon = d;
376            if (mTabView != null) {
377                mTabView.setFavicon(mIcon);
378            }
379        }
380
381    }
382
383    // TabChangeListener implementation
384
385    @Override
386    public void onCurrentTab(Tab tab) {
387        mTabs.setSelectedTab(mControl.getCurrentIndex());
388        TabViewData tvd = mTabMap.get(tab);
389        if (tvd != null) {
390            tvd.setProgress(tvd.mProgress);
391            // update the scroll state
392            WebView webview = tab.getWebView();
393            onScroll(webview.getVisibleTitleHeight() > 0);
394        }
395    }
396
397    @Override
398    public void onFavicon(Tab tab, Bitmap favicon) {
399        TabViewData tvd = mTabMap.get(tab);
400        if (tvd != null) {
401            tvd.setFavicon(favicon);
402        }
403    }
404
405    @Override
406    public void onNewTab(Tab tab) {
407        TabViewData tvd = buildTab(tab);
408        buildView(tvd);
409    }
410
411    @Override
412    public void onProgress(Tab tab, int progress) {
413        TabViewData tvd = mTabMap.get(tab);
414        if (tvd != null) {
415            tvd.setProgress(progress);
416        }
417    }
418
419    @Override
420    public void onRemoveTab(Tab tab) {
421        TabViewData tvd = mTabMap.get(tab);
422        TabView tv = tvd.mTabView;
423        if (tv != null) {
424            mTabs.removeTab(tv);
425        }
426        mTabMap.remove(tab);
427    }
428
429    @Override
430    public void onUrlAndTitle(Tab tab, String url, String title) {
431        TabViewData tvd = mTabMap.get(tab);
432        if (tvd != null) {
433            tvd.setUrlAndTitle(url, title);
434        }
435    }
436
437    @Override
438    public void onPageFinished(Tab tab) {
439    }
440
441    @Override
442    public void onPageStarted(Tab tab) {
443    }
444
445
446    private boolean isLoading() {
447        return mTabMap.get(mControl.getCurrentTab()).mTabView.mInLoad;
448    }
449
450}
451