RecentsActivityLaunchState.java revision 116b2c2c5430122ad7dfa14470bc640bf3c1c59f 
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
17package 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 */
28public class RecentsActivityLaunchState {
29
30    public boolean launchedWithAltTab;
31    public boolean launchedWithNoRecentTasks;
32    public boolean launchedFromAppWithThumbnail;
33    public boolean launchedFromHome;
34    public boolean launchedFromSearchHome;
35    public boolean launchedReuseTaskStackViews;
36    public boolean launchedHasConfigurationChanged;
37    public boolean launchedViaDragGesture;
38    public int launchedToTaskId;
39    public int launchedNumVisibleTasks;
40    public int launchedNumVisibleThumbnails;
41
42    /** Called when the configuration has changed, and we want to reset any configuration specific
43     * members. */
44    public void updateOnConfigurationChange() {
45        // Reset this flag on configuration change to ensure that we recreate new task views
46        launchedReuseTaskStackViews = false;
47        // Set this flag to indicate that the configuration has changed since Recents last launched
48        launchedHasConfigurationChanged = true;
49        launchedViaDragGesture = false;
50    }
51
52    /** Returns whether the status bar scrim should be animated when shown for the first time. */
53    public boolean shouldAnimateStatusBarScrim() {
54        return true;
55    }
56
57    /** Returns whether the status bar scrim should be visible. */
58    public boolean hasStatusBarScrim() {
59        return !launchedWithNoRecentTasks;
60    }
61
62    /** Returns whether the nav bar scrim should be animated when shown for the first time. */
63    public boolean shouldAnimateNavBarScrim() {
64        return true;
65    }
66
67    /** Returns whether the nav bar scrim should be visible. */
68    public boolean hasNavBarScrim() {
69        // Only show the scrim if we have recent tasks, and if the nav bar is not transposed
70        RecentsConfiguration config = Recents.getConfiguration();
71        return !launchedWithNoRecentTasks && !config.hasTransposedNavBar;
72    }
73
74    /**
75     * Returns the task to focus given the current launch state.
76     */
77    public int getInitialFocusTaskIndex(int numTasks) {
78        RecentsDebugFlags flags = Recents.getDebugFlags();
79        if (flags.isPageOnToggleEnabled() && !launchedWithAltTab) {
80            // If we are fast toggling, then focus the next task depending on when you are on home
81            // or coming in from another app
82            if (launchedFromHome) {
83                return numTasks - 1;
84            } else {
85                if (flags.isFastToggleRecentsEnabled() || !flags.isInitialStatePaging()) {
86                    return numTasks - 1;
87                } else {
88                    return numTasks - 2;
89                }
90            }
91        }
92
93        if (launchedWithAltTab && launchedFromAppWithThumbnail) {
94            // If alt-tabbing from another app, focus the next task
95            return numTasks - 2;
96        } else if ((launchedWithAltTab && launchedFromHome) ||
97                (!launchedWithAltTab && launchedFromAppWithThumbnail)) {
98            // If alt-tabbing from home, or launching from an app normally, focus that task
99            return numTasks - 1;
100        } else {
101            // Otherwise, we are launching recents from home normally, focus no tasks so that we
102            // know to return home
103            return -1;
104        }
105    }
106
107    @Override
108    public String toString() {
109        return "RecentsActivityLaunchState altTab: " + launchedWithAltTab +
110                ", noTasks: " + launchedWithNoRecentTasks +
111                ", fromHome: " + launchedFromHome +
112                ", fromSearchHome: " + launchedFromSearchHome +
113                ", reuse: " + launchedReuseTaskStackViews;
114    }
115}
116