1/*
2 * Copyright (C) 2017 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 android.support.wear.internal.widget;
18
19import android.content.Context;
20import android.support.annotation.FractionRes;
21import android.support.annotation.RestrictTo;
22import android.support.annotation.RestrictTo.Scope;
23
24/**
25 * Utility methods to help with resource calculations.
26 *
27 * @hide
28 */
29@RestrictTo(Scope.LIBRARY_GROUP)
30public final class ResourcesUtil {
31
32    /**
33     * Returns the screen width in pixels.
34     */
35    public static int getScreenWidthPx(Context context) {
36        return context.getResources().getDisplayMetrics().widthPixels;
37    }
38
39    /**
40     * Returns the screen height in pixels.
41     */
42    public static int getScreenHeightPx(Context context) {
43        return context.getResources().getDisplayMetrics().heightPixels;
44    }
45
46    /**
47     * Returns the number of pixels equivalent to the percentage of {@code resId} to the current
48     * screen.
49     */
50    public static int getFractionOfScreenPx(Context context, int screenPx, @FractionRes int resId) {
51        float marginPercent = context.getResources().getFraction(resId, 1, 1);
52        return (int) (marginPercent * screenPx);
53    }
54
55    private ResourcesUtil() {}
56}
57