TabBar.java revision ef0742696d31a3661414089446ff9a3ddd786639 
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;
20
21import android.app.Activity;
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.List;
44import java.util.Map;
45
46/**
47 * tabbed title bar for xlarge screen browser
48 */
49public class TabBar extends LinearLayout
50        implements ScrollListener, OnClickListener {
51
52    private static final int PROGRESS_MAX = 100;
53
54    private Activity mActivity;
55    private UiController mUiController;
56    private TabControl mTabControl;
57    private BaseUi mUi;
58
59    private final int mTabWidthSelected;
60    private final int mTabWidthUnselected;
61
62    private TabScrollView mTabs;
63
64    private ImageButton mNewTab;
65    private int mButtonWidth;
66
67    private Map<Tab, TabViewData> mTabMap;
68
69    private boolean mUserRequestedUrlbar;
70    private boolean mTitleVisible;
71    private boolean mShowUrlMode;
72    private boolean mHasReceivedTitle;
73
74    private Drawable mGenericFavicon;
75    private String mLoadingText;
76
77    public TabBar(Activity activity, UiController controller, BaseUi ui) {
78        super(activity);
79        mActivity = activity;
80        mUiController = controller;
81        mTabControl = mUiController.getTabControl();
82        mUi = ui;
83        Resources res = activity.getResources();
84        mTabWidthSelected = (int) res.getDimension(R.dimen.tab_width_selected);
85        mTabWidthUnselected = (int) res.getDimension(R.dimen.tab_width_unselected);
86
87        mTabMap = new HashMap<Tab, TabViewData>();
88        Resources resources = activity.getResources();
89        LayoutInflater factory = LayoutInflater.from(activity);
90        factory.inflate(R.layout.tab_bar, this);
91        mTabs = (TabScrollView) findViewById(R.id.tabs);
92        mNewTab = (ImageButton) findViewById(R.id.newtab);
93        mNewTab.setOnClickListener(this);
94        mGenericFavicon = res.getDrawable(R.drawable.app_web_browser_sm);
95        mLoadingText = res.getString(R.string.title_bar_loading);
96
97        // TODO: Change enabled states based on whether you can go
98        // back/forward.  Probably should be done inside onPageStarted.
99
100        updateTabs(mUiController.getTabs());
101
102        mUserRequestedUrlbar = false;
103        mTitleVisible = true;
104        mButtonWidth = -1;
105    }
106
107    void updateTabs(List<Tab> tabs) {
108        mTabs.clearTabs();
109        mTabMap.clear();
110        for (Tab tab : tabs) {
111            TabViewData data = buildTab(tab);
112            TabView tv = buildView(data);
113        }
114        mTabs.setSelectedTab(mTabControl.getCurrentIndex());
115    }
116
117    @Override
118    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
119        if (mButtonWidth == -1) {
120            mButtonWidth = mNewTab.getMeasuredWidth();
121        }
122        int sw = mTabs.getMeasuredWidth();
123        int w = right-left;
124        if (w-sw < mButtonWidth) {
125            sw = w - mButtonWidth;
126        }
127        mTabs.layout(0, 0, sw, bottom-top );
128        mNewTab.layout(sw, 0, sw+mButtonWidth, bottom-top);
129    }
130
131    public void onClick(View view) {
132        mUi.hideComboView();
133        if (mNewTab == view) {
134            mUiController.openTabToHomePage();
135        } else if (mTabs.getSelectedTab() == view) {
136            if (mUi.isFakeTitleBarShowing() && !isLoading()) {
137                mUi.hideFakeTitleBar();
138            } else {
139                showUrlBar();
140            }
141        } else {
142            int ix = mTabs.getChildIndex(view);
143            if (ix >= 0) {
144                mTabs.setSelectedTab(ix);
145                mUiController.switchToTab(ix);
146            }
147        }
148    }
149
150    private void showUrlBar() {
151        mUi.stopWebViewScrolling();
152        mUi.showFakeTitleBar();
153        mUserRequestedUrlbar = true;
154    }
155
156    private void setShowUrlMode(boolean showUrl) {
157        mShowUrlMode = showUrl;
158    }
159
160    // callback after fake titlebar is shown
161    void onShowTitleBar() {
162        setShowUrlMode(false);
163    }
164
165    // callback after fake titlebar is hidden
166    void onHideTitleBar() {
167        setShowUrlMode(!mTitleVisible);
168        Tab tab = mTabControl.getCurrentTab();
169        tab.getWebView().requestFocus();
170        mUserRequestedUrlbar = false;
171    }
172
173    // webview scroll listener
174
175    @Override
176    public void onScroll(boolean titleVisible) {
177        // isLoading is using the current tab, which initially might not be set yet
178        if (mTabControl.getCurrentTab() != null) {
179            mTitleVisible = titleVisible;
180            if (!mShowUrlMode && !mTitleVisible && !isLoading()) {
181                if (mUserRequestedUrlbar) {
182                    mUi.hideFakeTitleBar();
183                } else {
184                    setShowUrlMode(true);
185                }
186            } else if (mTitleVisible && !isLoading()) {
187                if (mShowUrlMode) {
188                    setShowUrlMode(false);
189                }
190            }
191        }
192    }
193
194    @Override
195    public void createContextMenu(ContextMenu menu) {
196        MenuInflater inflater = mActivity.getMenuInflater();
197        inflater.inflate(R.menu.title_context, menu);
198        mActivity.onCreateContextMenu(menu, this, null);
199    }
200
201    private TabViewData buildTab(Tab tab) {
202        TabViewData data = new TabViewData(tab);
203        mTabMap.put(tab, data);
204        return data;
205    }
206
207    private TabView buildView(final TabViewData data) {
208        TabView tv = new TabView(mActivity, data);
209        tv.setTag(data);
210        tv.setOnClickListener(this);
211        mTabs.addTab(tv);
212        return tv;
213    }
214
215    /**
216     * View used in the tab bar
217     */
218    class TabView extends LinearLayout implements OnClickListener {
219
220        TabViewData mTabData;
221        View mTabContent;
222        TextView mTitle;
223        View mIncognito;
224        ImageView mIconView;
225        ImageView mLock;
226        ImageView mClose;
227        boolean mSelected;
228        boolean mInLoad;
229
230        /**
231         * @param context
232         */
233        public TabView(Context context, TabViewData tab) {
234            super(context);
235            mTabData = tab;
236            setGravity(Gravity.CENTER_VERTICAL);
237            setOrientation(LinearLayout.HORIZONTAL);
238            setBackgroundResource(R.drawable.tab_background);
239            LayoutInflater inflater = LayoutInflater.from(getContext());
240            mTabContent = inflater.inflate(R.layout.tab_title, this, true);
241            mTitle = (TextView) mTabContent.findViewById(R.id.title);
242            mIconView = (ImageView) mTabContent.findViewById(R.id.favicon);
243            mLock = (ImageView) mTabContent.findViewById(R.id.lock);
244            mClose = (ImageView) mTabContent.findViewById(R.id.close);
245            mClose.setOnClickListener(this);
246            mIncognito = mTabContent.findViewById(R.id.incognito);
247            mSelected = false;
248            mInLoad = false;
249            // update the status
250            updateFromData();
251        }
252
253        @Override
254        public void onClick(View v) {
255            if (v == mClose) {
256                closeTab();
257            }
258        }
259
260        private void updateFromData() {
261            mTabData.mTabView = this;
262            if (mTabData.mUrl != null) {
263                setDisplayTitle(mTabData.mUrl);
264            }
265            if (mTabData.mTitle != null) {
266                setDisplayTitle(mTabData.mTitle);
267            }
268            setProgress(mTabData.mProgress);
269            if (mTabData.mIcon != null) {
270                setFavicon(mTabData.mIcon);
271            }
272            if (mTabData.mLock != null) {
273                setLock(mTabData.mLock);
274            }
275            if (mTabData.mTab != null) {
276                mIncognito.setVisibility(
277                        mTabData.mTab.isPrivateBrowsingEnabled() ?
278                        View.VISIBLE : View.GONE);
279            }
280        }
281
282        @Override
283        public void setActivated(boolean selected) {
284            mSelected = selected;
285            mClose.setVisibility(mSelected ? View.VISIBLE : View.GONE);
286            mTitle.setTextAppearance(mActivity, mSelected ?
287                    R.style.TabTitleSelected : R.style.TabTitleUnselected);
288            setHorizontalFadingEdgeEnabled(!mSelected);
289            setFadingEdgeLength(50);
290            super.setActivated(selected);
291            setLayoutParams(new LayoutParams(selected ?
292                    mTabWidthSelected : mTabWidthUnselected,
293                    LayoutParams.MATCH_PARENT));
294        }
295
296        void setDisplayTitle(String title) {
297            mTitle.setText(title);
298        }
299
300        void setFavicon(Drawable d) {
301            mIconView.setImageDrawable(d);
302        }
303
304        void setLock(Drawable d) {
305            if (null == d) {
306                mLock.setVisibility(View.GONE);
307            } else {
308                mLock.setImageDrawable(d);
309                mLock.setVisibility(View.VISIBLE);
310            }
311        }
312
313        void setProgress(int newProgress) {
314            if (newProgress >= PROGRESS_MAX) {
315                mInLoad = false;
316            } else {
317                if (!mInLoad && getWindowToken() != null) {
318                    mInLoad = true;
319                }
320            }
321        }
322
323        private void closeTab() {
324            if (mTabData.mTab == mTabControl.getCurrentTab()) {
325                mUiController.closeCurrentTab();
326            } else {
327                mUiController.closeTab(mTabData.mTab);
328            }
329        }
330
331    }
332
333    /**
334     * Store tab state within the title bar
335     */
336    class TabViewData {
337
338        Tab mTab;
339        TabView mTabView;
340        int mProgress;
341        Drawable mIcon;
342        Drawable mLock;
343        String mTitle;
344        String mUrl;
345
346        TabViewData(Tab tab) {
347            mTab = tab;
348            WebView web = tab.getWebView();
349            if (web != null) {
350                setUrlAndTitle(web.getUrl(), web.getTitle());
351            }
352        }
353
354        void setUrlAndTitle(String url, String title) {
355            mUrl = url;
356            mTitle = title;
357            if (mTabView != null) {
358                if (title != null) {
359                    mTabView.setDisplayTitle(title);
360                } else if (url != null) {
361                    mTabView.setDisplayTitle(UrlUtils.stripUrl(url));
362                }
363            }
364        }
365
366        void setProgress(int newProgress) {
367            mProgress = newProgress;
368            if (mTabView != null) {
369                mTabView.setProgress(mProgress);
370            }
371        }
372
373        void setFavicon(Bitmap icon) {
374            Drawable[] array = new Drawable[3];
375            array[0] = new PaintDrawable(Color.BLACK);
376            array[1] = new PaintDrawable(Color.WHITE);
377            if (icon == null) {
378                array[2] = mGenericFavicon;
379            } else {
380                array[2] = new BitmapDrawable(icon);
381            }
382            LayerDrawable d = new LayerDrawable(array);
383            d.setLayerInset(1, 1, 1, 1, 1);
384            d.setLayerInset(2, 2, 2, 2, 2);
385            mIcon = d;
386            if (mTabView != null) {
387                mTabView.setFavicon(mIcon);
388            }
389        }
390
391    }
392
393    // TabChangeListener implementation
394
395    public void onSetActiveTab(Tab tab) {
396        mTabs.setSelectedTab(mTabControl.getTabIndex(tab));
397        TabViewData tvd = mTabMap.get(tab);
398        if (tvd != null) {
399            tvd.setProgress(tvd.mProgress);
400            // update the scroll state
401            WebView webview = tab.getWebView();
402            onScroll(webview.getVisibleTitleHeight() > 0);
403        }
404    }
405
406    public void onFavicon(Tab tab, Bitmap favicon) {
407        TabViewData tvd = mTabMap.get(tab);
408        if (tvd != null) {
409            tvd.setFavicon(favicon);
410        }
411    }
412
413    public void onNewTab(Tab tab) {
414        TabViewData tvd = buildTab(tab);
415        buildView(tvd);
416    }
417
418    public void onProgress(Tab tab, int progress) {
419        TabViewData tvd = mTabMap.get(tab);
420        if (tvd != null) {
421            tvd.setProgress(progress);
422        }
423    }
424
425    public void onRemoveTab(Tab tab) {
426        TabViewData tvd = mTabMap.get(tab);
427        if (tvd != null) {
428            TabView tv = tvd.mTabView;
429            if (tv != null) {
430                mTabs.removeTab(tv);
431            }
432        }
433        mTabMap.remove(tab);
434    }
435
436    public void onUrlAndTitle(Tab tab, String url, String title) {
437        mHasReceivedTitle = true;
438        TabViewData tvd = mTabMap.get(tab);
439        if (tvd != null) {
440            tvd.setUrlAndTitle(url, title);
441        }
442    }
443
444    public void onPageFinished(Tab tab) {
445        if (!mHasReceivedTitle) {
446            TabViewData tvd = mTabMap.get(tab);
447            if (tvd != null) {
448                tvd.setUrlAndTitle(tvd.mUrl, null);
449            }
450        }
451    }
452
453    public void onPageStarted(Tab tab, String url, Bitmap favicon) {
454        mHasReceivedTitle = false;
455        TabViewData tvd = mTabMap.get(tab);
456        if (tvd != null) {
457            tvd.setFavicon(favicon);
458            tvd.setUrlAndTitle(url, mLoadingText);
459        }
460    }
461
462    private boolean isLoading() {
463        TabViewData tvd = mTabMap.get(mTabControl.getCurrentTab());
464        if ((tvd != null) && (tvd.mTabView != null)) {
465            return tvd.mTabView.mInLoad;
466        } else {
467            return false;
468        }
469    }
470
471}
472