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 
17 package com.android.messaging.util;
18 
19 import android.content.res.ColorStateList;
20 import android.graphics.Color;
21 import android.graphics.PorterDuff;
22 import android.graphics.drawable.Drawable;
23 import android.support.v7.graphics.drawable.DrawableWrapper;
24 
25 /*
26  * This is directly copied from v7/appcompat/src/android/support/v7/internal/widget/TintManager.java
27  */
28 
29 /**
30  * A {@link DrawableWrapper} which updates it's color filter using a {@link ColorStateList}.
31  */
32 class TintDrawableWrapper extends DrawableWrapper {
33     private final ColorStateList mTintStateList;
34     private final PorterDuff.Mode mTintMode;
35     private int mCurrentColor;
TintDrawableWrapper(Drawable drawable, ColorStateList tintStateList)36     public TintDrawableWrapper(Drawable drawable, ColorStateList tintStateList) {
37         this(drawable, tintStateList, PorterDuff.Mode.SRC_IN);
38     }
TintDrawableWrapper(Drawable drawable, ColorStateList tintStateList, PorterDuff.Mode tintMode)39     public TintDrawableWrapper(Drawable drawable, ColorStateList tintStateList,
40             PorterDuff.Mode tintMode) {
41         super(drawable);
42         mTintStateList = tintStateList;
43         mTintMode = tintMode;
44     }
45     @Override
isStateful()46     public boolean isStateful() {
47         return (mTintStateList != null && mTintStateList.isStateful()) || super.isStateful();
48     }
49     @Override
setState(int[] stateSet)50     public boolean setState(int[] stateSet) {
51         boolean handled = super.setState(stateSet);
52         handled = updateTint(stateSet) || handled;
53         return handled;
54     }
updateTint(int[] state)55     private boolean updateTint(int[] state) {
56         if (mTintStateList != null) {
57             final int color = mTintStateList.getColorForState(state, mCurrentColor);
58             if (color != mCurrentColor) {
59                 if (color != Color.TRANSPARENT) {
60                     setColorFilter(color, mTintMode);
61                 } else {
62                     clearColorFilter();
63                 }
64                 mCurrentColor = color;
65                 return true;
66             }
67         }
68         return false;
69     }
70 }
71