RecentsConfiguration.java revision 303e1ff1fec8b240b587bb18b981247a99833aa8 
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
19import android.content.Context;
20import android.content.res.Configuration;
21import android.graphics.Rect;
22import android.util.DisplayMetrics;
23import android.util.TypedValue;
24
25
26/** A static Recents configuration for the current context
27 * NOTE: We should not hold any references to a Context from a static instance */
28public class RecentsConfiguration {
29    static RecentsConfiguration sInstance;
30
31    DisplayMetrics mDisplayMetrics;
32
33    public boolean layoutVerticalStack;
34    public Rect systemInsets = new Rect();
35
36    /** Private constructor */
37    private RecentsConfiguration() {}
38
39    /** Updates the configuration to the current context */
40    public static RecentsConfiguration reinitialize(Context context) {
41        if (sInstance == null) {
42            sInstance = new RecentsConfiguration();
43        }
44        sInstance.update(context);
45        return sInstance;
46    }
47
48    /** Returns the current recents configuration */
49    public static RecentsConfiguration getInstance() {
50        return sInstance;
51    }
52
53    /** Updates the state, given the specified context */
54    void update(Context context) {
55        mDisplayMetrics = context.getResources().getDisplayMetrics();
56
57        boolean isPortrait = context.getResources().getConfiguration().orientation ==
58                Configuration.ORIENTATION_PORTRAIT;
59        layoutVerticalStack = isPortrait || Constants.LANDSCAPE_LAYOUT_VERTICAL_STACK;
60    }
61
62    public void updateSystemInsets(Rect insets) {
63        systemInsets.set(insets);
64    }
65
66    /** Converts from DPs to PXs */
67    public int pxFromDp(float size) {
68        return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
69                size, mDisplayMetrics));
70    }
71    /** Converts from SPs to PXs */
72    public int pxFromSp(float size) {
73        return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
74                size, mDisplayMetrics));
75    }
76}
77