1/*
2 * Copyright (C) 2015 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.v7.widget;
18
19import android.graphics.drawable.Drawable;
20import android.os.Build;
21import android.support.v4.content.ContextCompat;
22import android.support.v7.appcompat.R;
23import android.util.AttributeSet;
24import android.widget.ImageView;
25
26/**
27 * @hide
28 */
29public class AppCompatImageHelper {
30
31    private final ImageView mView;
32    private final AppCompatDrawableManager mDrawableManager;
33
34    public AppCompatImageHelper(ImageView view, AppCompatDrawableManager drawableManager) {
35        mView = view;
36        mDrawableManager = drawableManager;
37    }
38
39    public void loadFromAttributes(AttributeSet attrs, int defStyleAttr) {
40        TintTypedArray a = null;
41        try {
42            Drawable drawable = mView.getDrawable();
43
44            if (drawable == null) {
45                a = TintTypedArray.obtainStyledAttributes(mView.getContext(), attrs,
46                        R.styleable.AppCompatImageView, defStyleAttr, 0);
47
48                // If the view doesn't already have a drawable (from android:src), try loading
49                // it from srcCompat
50                final int id = a.getResourceId(R.styleable.AppCompatImageView_srcCompat, -1);
51                if (id != -1) {
52                    drawable = mDrawableManager.getDrawable(mView.getContext(), id);
53                    if (drawable != null) {
54                        mView.setImageDrawable(drawable);
55                    }
56                }
57            }
58
59            if (drawable != null) {
60                DrawableUtils.fixDrawable(drawable);
61            }
62        } finally {
63            if (a != null) {
64                a.recycle();
65            }
66        }
67    }
68
69    public void setImageResource(int resId) {
70        if (resId != 0) {
71            final Drawable d = mDrawableManager != null
72                    ? mDrawableManager.getDrawable(mView.getContext(), resId)
73                    : ContextCompat.getDrawable(mView.getContext(), resId);
74            if (d != null) {
75                DrawableUtils.fixDrawable(d);
76            }
77            mView.setImageDrawable(d);
78        } else {
79            mView.setImageDrawable(null);
80        }
81    }
82
83    boolean hasOverlappingRendering() {
84        final Drawable background = mView.getBackground();
85        if (Build.VERSION.SDK_INT >= 21
86                && background instanceof android.graphics.drawable.RippleDrawable) {
87            // RippleDrawable has an issue on L+ when used with an alpha animation.
88            // This workaround should be disabled when the platform bug is fixed. See b/27715789
89            return false;
90        }
91        return true;
92    }
93}
94