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.util.SparseArray;
17import android.graphics.Outline;
18import android.view.ViewOutlineProvider;
19import android.view.View;
20
21class RoundedRectHelperApi21 {
22
23    private static SparseArray<ViewOutlineProvider> sRoundedRectProvider;
24    private static final int MAX_CACHED_PROVIDER = 32;
25
26    static final class RoundedRectOutlineProvider extends ViewOutlineProvider {
27
28        private int mRadius;
29
30        RoundedRectOutlineProvider(int radius) {
31            mRadius = radius;
32        }
33
34        @Override
35        public void getOutline(View view, Outline outline) {
36            outline.setRoundRect(0, 0, view.getWidth(), view.getHeight(), mRadius);
37            outline.setAlpha(1f);
38        }
39    };
40
41    public static void setClipToRoundedOutline(View view, boolean clip, int roundedCornerRadius) {
42        if (clip) {
43            if (sRoundedRectProvider == null) {
44                sRoundedRectProvider = new SparseArray<ViewOutlineProvider>();
45            }
46            ViewOutlineProvider provider = sRoundedRectProvider.get(roundedCornerRadius);
47            if (provider == null) {
48                provider = new RoundedRectOutlineProvider(roundedCornerRadius);
49                if (sRoundedRectProvider.size() < MAX_CACHED_PROVIDER) {
50                    sRoundedRectProvider.put(roundedCornerRadius, provider);
51                }
52            }
53            view.setOutlineProvider(provider);
54        } else {
55            view.setOutlineProvider(ViewOutlineProvider.BACKGROUND);
56        }
57        view.setClipToOutline(clip);
58    }
59}
60