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      1 /*
      2  * Copyright (C) 2012 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 
     17 package com.android.systemui.recent;
     18 
     19 import android.app.Activity;
     20 import android.app.ActivityManager;
     21 import android.app.WallpaperManager;
     22 import android.content.BroadcastReceiver;
     23 import android.content.Context;
     24 import android.content.Intent;
     25 import android.content.IntentFilter;
     26 import android.os.Bundle;
     27 import android.os.UserHandle;
     28 import android.view.MotionEvent;
     29 import android.view.View;
     30 import android.view.WindowManager;
     31 
     32 import com.android.systemui.R;
     33 import com.android.systemui.statusbar.tablet.StatusBarPanel;
     34 
     35 import java.util.List;
     36 
     37 public class RecentsActivity extends Activity {
     38     public static final String TOGGLE_RECENTS_INTENT = "com.android.systemui.recent.action.TOGGLE_RECENTS";
     39     public static final String PRELOAD_INTENT = "com.android.systemui.recent.action.PRELOAD";
     40     public static final String CANCEL_PRELOAD_INTENT = "com.android.systemui.recent.CANCEL_PRELOAD";
     41     public static final String CLOSE_RECENTS_INTENT = "com.android.systemui.recent.action.CLOSE";
     42     public static final String WINDOW_ANIMATION_START_INTENT = "com.android.systemui.recent.action.WINDOW_ANIMATION_START";
     43     public static final String PRELOAD_PERMISSION = "com.android.systemui.recent.permission.PRELOAD";
     44     public static final String WAITING_FOR_WINDOW_ANIMATION_PARAM = "com.android.systemui.recent.WAITING_FOR_WINDOW_ANIMATION";
     45     private static final String WAS_SHOWING = "was_showing";
     46 
     47     private RecentsPanelView mRecentsPanel;
     48     private IntentFilter mIntentFilter;
     49     private boolean mShowing;
     50     private boolean mForeground;
     51 
     52     private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
     53         @Override
     54         public void onReceive(Context context, Intent intent) {
     55             if (CLOSE_RECENTS_INTENT.equals(intent.getAction())) {
     56                 if (mRecentsPanel != null && mRecentsPanel.isShowing()) {
     57                     if (mShowing && !mForeground) {
     58                         // Captures the case right before we transition to another activity
     59                         mRecentsPanel.show(false);
     60                     }
     61                 }
     62             } else if (WINDOW_ANIMATION_START_INTENT.equals(intent.getAction())) {
     63                 if (mRecentsPanel != null) {
     64                     mRecentsPanel.onWindowAnimationStart();
     65                 }
     66             }
     67         }
     68     };
     69 
     70     public class TouchOutsideListener implements View.OnTouchListener {
     71         private StatusBarPanel mPanel;
     72 
     73         public TouchOutsideListener(StatusBarPanel panel) {
     74             mPanel = panel;
     75         }
     76 
     77         public boolean onTouch(View v, MotionEvent ev) {
     78             final int action = ev.getAction();
     79             if (action == MotionEvent.ACTION_OUTSIDE
     80                     || (action == MotionEvent.ACTION_DOWN
     81                     && !mPanel.isInContentArea((int) ev.getX(), (int) ev.getY()))) {
     82                 dismissAndGoHome();
     83                 return true;
     84             }
     85             return false;
     86         }
     87     }
     88 
     89     @Override
     90     public void onPause() {
     91         overridePendingTransition(
     92                 R.anim.recents_return_to_launcher_enter,
     93                 R.anim.recents_return_to_launcher_exit);
     94         mForeground = false;
     95         super.onPause();
     96     }
     97 
     98     @Override
     99     public void onStop() {
    100         mShowing = false;
    101         if (mRecentsPanel != null) {
    102             mRecentsPanel.onUiHidden();
    103         }
    104         super.onStop();
    105     }
    106 
    107     private void updateWallpaperVisibility(boolean visible) {
    108         int wpflags = visible ? WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER : 0;
    109         int curflags = getWindow().getAttributes().flags
    110                 & WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER;
    111         if (wpflags != curflags) {
    112             getWindow().setFlags(wpflags, WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER);
    113         }
    114     }
    115 
    116     public static boolean forceOpaqueBackground(Context context) {
    117         return WallpaperManager.getInstance(context).getWallpaperInfo() != null;
    118     }
    119 
    120     @Override
    121     public void onStart() {
    122         // Hide wallpaper if it's not a static image
    123         if (forceOpaqueBackground(this)) {
    124             updateWallpaperVisibility(false);
    125         } else {
    126             updateWallpaperVisibility(true);
    127         }
    128         mShowing = true;
    129         if (mRecentsPanel != null) {
    130             // Call and refresh the recent tasks list in case we didn't preload tasks
    131             // or in case we don't get an onNewIntent
    132             mRecentsPanel.refreshRecentTasksList();
    133             mRecentsPanel.refreshViews();
    134         }
    135         super.onStart();
    136     }
    137 
    138     @Override
    139     public void onResume() {
    140         mForeground = true;
    141         super.onResume();
    142     }
    143 
    144     @Override
    145     public void onBackPressed() {
    146         dismissAndGoBack();
    147     }
    148 
    149     public void dismissAndGoHome() {
    150         if (mRecentsPanel != null) {
    151             Intent homeIntent = new Intent(Intent.ACTION_MAIN, null);
    152             homeIntent.addCategory(Intent.CATEGORY_HOME);
    153             homeIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK
    154                     | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
    155             startActivityAsUser(homeIntent, new UserHandle(UserHandle.USER_CURRENT));
    156             mRecentsPanel.show(false);
    157         }
    158     }
    159 
    160     public void dismissAndGoBack() {
    161         if (mRecentsPanel != null) {
    162             final ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
    163 
    164             final List<ActivityManager.RecentTaskInfo> recentTasks =
    165                     am.getRecentTasks(2,
    166                             ActivityManager.RECENT_WITH_EXCLUDED |
    167                             ActivityManager.RECENT_IGNORE_UNAVAILABLE);
    168             if (recentTasks.size() > 1 &&
    169                     mRecentsPanel.simulateClick(recentTasks.get(1).persistentId)) {
    170                 // recents panel will take care of calling show(false) through simulateClick
    171                 return;
    172             }
    173             mRecentsPanel.show(false);
    174         }
    175         finish();
    176     }
    177 
    178     @Override
    179     protected void onCreate(Bundle savedInstanceState) {
    180         setContentView(R.layout.status_bar_recent_panel);
    181         mRecentsPanel = (RecentsPanelView) findViewById(R.id.recents_root);
    182         mRecentsPanel.setOnTouchListener(new TouchOutsideListener(mRecentsPanel));
    183         mRecentsPanel.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
    184 
    185         final RecentTasksLoader recentTasksLoader = RecentTasksLoader.getInstance(this);
    186         recentTasksLoader.setRecentsPanel(mRecentsPanel, mRecentsPanel);
    187         mRecentsPanel.setMinSwipeAlpha(
    188                 getResources().getInteger(R.integer.config_recent_item_min_alpha) / 100f);
    189 
    190         if (savedInstanceState == null ||
    191                 savedInstanceState.getBoolean(WAS_SHOWING)) {
    192             handleIntent(getIntent(), (savedInstanceState == null));
    193         }
    194         mIntentFilter = new IntentFilter();
    195         mIntentFilter.addAction(CLOSE_RECENTS_INTENT);
    196         mIntentFilter.addAction(WINDOW_ANIMATION_START_INTENT);
    197         registerReceiver(mIntentReceiver, mIntentFilter);
    198         super.onCreate(savedInstanceState);
    199     }
    200 
    201     @Override
    202     protected void onSaveInstanceState(Bundle outState) {
    203         outState.putBoolean(WAS_SHOWING, mRecentsPanel.isShowing());
    204     }
    205 
    206     @Override
    207     protected void onDestroy() {
    208         RecentTasksLoader.getInstance(this).setRecentsPanel(null, mRecentsPanel);
    209         unregisterReceiver(mIntentReceiver);
    210         super.onDestroy();
    211     }
    212 
    213     @Override
    214     protected void onNewIntent(Intent intent) {
    215         handleIntent(intent, true);
    216     }
    217 
    218     private void handleIntent(Intent intent, boolean checkWaitingForAnimationParam) {
    219         super.onNewIntent(intent);
    220 
    221         if (TOGGLE_RECENTS_INTENT.equals(intent.getAction())) {
    222             if (mRecentsPanel != null) {
    223                 if (mRecentsPanel.isShowing()) {
    224                     dismissAndGoBack();
    225                 } else {
    226                     final RecentTasksLoader recentTasksLoader = RecentTasksLoader.getInstance(this);
    227                     boolean waitingForWindowAnimation = checkWaitingForAnimationParam &&
    228                             intent.getBooleanExtra(WAITING_FOR_WINDOW_ANIMATION_PARAM, false);
    229                     mRecentsPanel.show(true, recentTasksLoader.getLoadedTasks(),
    230                             recentTasksLoader.isFirstScreenful(), waitingForWindowAnimation);
    231                 }
    232             }
    233         }
    234     }
    235 
    236     boolean isForeground() {
    237         return mForeground;
    238     }
    239 
    240     boolean isActivityShowing() {
    241          return mShowing;
    242     }
    243 }
    244