1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5 * in compliance with the License. You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the License
10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11 * or implied. See the License for the specific language governing permissions and limitations under
12 * the License.
13 */
14package android.support.v17.leanback.widget;
15
16import android.graphics.Outline;
17import android.support.annotation.RequiresApi;
18import android.util.SparseArray;
19import android.view.View;
20import android.view.ViewOutlineProvider;
21
22@RequiresApi(21)
23class RoundedRectHelperApi21 {
24
25    private static SparseArray<ViewOutlineProvider> sRoundedRectProvider;
26    private static final int MAX_CACHED_PROVIDER = 32;
27
28    static final class RoundedRectOutlineProvider extends ViewOutlineProvider {
29
30        private int mRadius;
31
32        RoundedRectOutlineProvider(int radius) {
33            mRadius = radius;
34        }
35
36        @Override
37        public void getOutline(View view, Outline outline) {
38            outline.setRoundRect(0, 0, view.getWidth(), view.getHeight(), mRadius);
39            outline.setAlpha(1f);
40        }
41    };
42
43    public static void setClipToRoundedOutline(View view, boolean clip, int roundedCornerRadius) {
44        if (clip) {
45            if (sRoundedRectProvider == null) {
46                sRoundedRectProvider = new SparseArray<ViewOutlineProvider>();
47            }
48            ViewOutlineProvider provider = sRoundedRectProvider.get(roundedCornerRadius);
49            if (provider == null) {
50                provider = new RoundedRectOutlineProvider(roundedCornerRadius);
51                if (sRoundedRectProvider.size() < MAX_CACHED_PROVIDER) {
52                    sRoundedRectProvider.put(roundedCornerRadius, provider);
53                }
54            }
55            view.setOutlineProvider(provider);
56        } else {
57            view.setOutlineProvider(ViewOutlineProvider.BACKGROUND);
58        }
59        view.setClipToOutline(clip);
60    }
61}
62