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 com.android.messaging.util;
18
19import android.content.res.ColorStateList;
20import android.graphics.Color;
21import android.graphics.PorterDuff;
22import android.graphics.drawable.Drawable;
23import 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 */
32class TintDrawableWrapper extends DrawableWrapper {
33    private final ColorStateList mTintStateList;
34    private final PorterDuff.Mode mTintMode;
35    private int mCurrentColor;
36    public TintDrawableWrapper(Drawable drawable, ColorStateList tintStateList) {
37        this(drawable, tintStateList, PorterDuff.Mode.SRC_IN);
38    }
39    public TintDrawableWrapper(Drawable drawable, ColorStateList tintStateList,
40            PorterDuff.Mode tintMode) {
41        super(drawable);
42        mTintStateList = tintStateList;
43        mTintMode = tintMode;
44    }
45    @Override
46    public boolean isStateful() {
47        return (mTintStateList != null && mTintStateList.isStateful()) || super.isStateful();
48    }
49    @Override
50    public boolean setState(int[] stateSet) {
51        boolean handled = super.setState(stateSet);
52        handled = updateTint(stateSet) || handled;
53        return handled;
54    }
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