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      1 /*
      2  * Copyright (C) 2014 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.recents;
     18 
     19 /**
     20  * The launch state of the RecentsActivity.
     21  *
     22  * Current Constraints:
     23  *  - needed in onStart() before onNewIntent()
     24  *  - needs to be reset when Recents is hidden
     25  *  - needs to be computed in Recents component
     26  *  - needs to be accessible by views
     27  */
     28 public class RecentsActivityLaunchState {
     29 
     30     public boolean launchedWithAltTab;
     31     public boolean launchedFromApp;
     32     public boolean launchedFromHome;
     33     public boolean launchedViaDragGesture;
     34     public boolean launchedViaDockGesture;
     35     public int launchedToTaskId;
     36     public int launchedNumVisibleTasks;
     37     public int launchedNumVisibleThumbnails;
     38 
     39     public void reset() {
     40         launchedFromHome = false;
     41         launchedFromApp = false;
     42         launchedToTaskId = -1;
     43         launchedWithAltTab = false;
     44         launchedViaDragGesture = false;
     45         launchedViaDockGesture = false;
     46     }
     47 
     48     /**
     49      * Returns the task to focus given the current launch state.
     50      */
     51     public int getInitialFocusTaskIndex(int numTasks) {
     52         RecentsDebugFlags debugFlags = Recents.getDebugFlags();
     53         RecentsActivityLaunchState launchState = Recents.getConfiguration().getLaunchState();
     54         if (launchedFromApp) {
     55             if (!launchState.launchedWithAltTab && debugFlags.isFastToggleRecentsEnabled()) {
     56                 // If fast toggling, focus the front most task so that the next tap will focus the
     57                 // N-1 task
     58                 return numTasks - 1;
     59             }
     60 
     61             // If coming from another app, focus the next task
     62             return Math.max(0, numTasks - 2);
     63         } else {
     64             if (!launchState.launchedWithAltTab && debugFlags.isFastToggleRecentsEnabled()) {
     65                 // If fast toggling, defer focusing until the next tap (which will automatically
     66                 // focus the front most task)
     67                 return -1;
     68             }
     69 
     70             // If coming from home, focus the first task
     71             return numTasks - 1;
     72         }
     73     }
     74 }
     75