1/*
2 * Copyright (C) 2016 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 */
16package com.android.launcher3.graphics;
17
18import android.content.Context;
19import android.graphics.Canvas;
20import android.graphics.Paint;
21import android.graphics.Paint.FontMetricsInt;
22import android.graphics.drawable.Drawable;
23import android.text.style.DynamicDrawableSpan;
24
25/**
26 * {@link DynamicDrawableSpan} which draws a drawable tinted with the current paint color.
27 */
28public class TintedDrawableSpan extends DynamicDrawableSpan {
29
30    private final Drawable mDrawable;
31    private int mOldTint;
32
33    public TintedDrawableSpan(Context context, int resourceId) {
34        super(ALIGN_BOTTOM);
35        mDrawable = context.getDrawable(resourceId);
36        mOldTint = 0;
37        mDrawable.setTint(0);
38    }
39
40    @Override
41    public int getSize(Paint paint, CharSequence text, int start, int end, FontMetricsInt fm) {
42        fm = fm == null ? paint.getFontMetricsInt() : fm;
43        int iconSize = fm.bottom - fm.top;
44        mDrawable.setBounds(0, 0, iconSize, iconSize);
45        return super.getSize(paint, text, start, end, fm);
46    }
47
48    @Override
49    public void draw(Canvas canvas, CharSequence text,
50            int start, int end, float x, int top, int y, int bottom, Paint paint) {
51        int color = paint.getColor();
52        if (mOldTint != color) {
53            mOldTint = color;
54            mDrawable.setTint(mOldTint);
55        }
56        super.draw(canvas, text, start, end, x, top, y, bottom, paint);
57    }
58
59    @Override
60    public Drawable getDrawable() {
61        return mDrawable;
62    }
63}
64