1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.launcher3.graphics;
import android.annotation.TargetApi;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.util.AttributeSet;
import com.android.launcher3.R;
import com.android.launcher3.Utilities;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import java.io.IOException;
/**
* A drawable which adds shadow around a child drawable.
*/
@TargetApi(Build.VERSION_CODES.O)
public class ShadowDrawable extends Drawable {
private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
private final ShadowDrawableState mState;
@SuppressWarnings("unused")
public ShadowDrawable() {
this(new ShadowDrawableState());
}
private ShadowDrawable(ShadowDrawableState state) {
mState = state;
}
@Override
public void draw(Canvas canvas) {
Rect bounds = getBounds();
if (bounds.isEmpty()) {
return;
}
if (mState.mLastDrawnBitmap == null) {
regenerateBitmapCache();
}
canvas.drawBitmap(mState.mLastDrawnBitmap, null, bounds, mPaint);
}
@Override
public void setAlpha(int alpha) {
mPaint.setAlpha(alpha);
invalidateSelf();
}
@Override
public void setColorFilter(ColorFilter colorFilter) {
mPaint.setColorFilter(colorFilter);
invalidateSelf();
}
@Override
public ConstantState getConstantState() {
return mState;
}
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
@Override
public int getIntrinsicHeight() {
return mState.mIntrinsicHeight;
}
@Override
public int getIntrinsicWidth() {
return mState.mIntrinsicWidth;
}
@Override
public boolean canApplyTheme() {
return mState.canApplyTheme();
}
@Override
public void applyTheme(Resources.Theme t) {
TypedArray ta = t.obtainStyledAttributes(new int[] {R.attr.isWorkspaceDarkText});
boolean isDark = ta.getBoolean(0, false);
ta.recycle();
if (mState.mIsDark != isDark) {
mState.mIsDark = isDark;
mState.mLastDrawnBitmap = null;
invalidateSelf();
}
}
private void regenerateBitmapCache() {
Bitmap bitmap = Bitmap.createBitmap(mState.mIntrinsicWidth, mState.mIntrinsicHeight,
Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
// Call mutate, so that the pixel allocation by the underlying vector drawable is cleared.
Drawable d = mState.mChildState.newDrawable().mutate();
d.setBounds(mState.mShadowSize, mState.mShadowSize,
mState.mIntrinsicWidth - mState.mShadowSize,
mState.mIntrinsicHeight - mState.mShadowSize);
d.setTint(mState.mIsDark ? mState.mDarkTintColor : Color.WHITE);
d.draw(canvas);
// Do not draw shadow on dark theme
if (!mState.mIsDark) {
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
paint.setMaskFilter(new BlurMaskFilter(mState.mShadowSize, BlurMaskFilter.Blur.NORMAL));
int[] offset = new int[2];
Bitmap shadow = bitmap.extractAlpha(paint, offset);
paint.setMaskFilter(null);
paint.setColor(mState.mShadowColor);
bitmap.eraseColor(Color.TRANSPARENT);
canvas.drawBitmap(shadow, offset[0], offset[1], paint);
d.draw(canvas);
}
if (Utilities.ATLEAST_OREO) {
bitmap = bitmap.copy(Bitmap.Config.HARDWARE, false);
}
mState.mLastDrawnBitmap = bitmap;
}
@Override
public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs,
Resources.Theme theme) throws XmlPullParserException, IOException {
super.inflate(r, parser, attrs, theme);
final TypedArray a = theme == null
? r.obtainAttributes(attrs, R.styleable.ShadowDrawable)
: theme.obtainStyledAttributes(attrs, R.styleable.ShadowDrawable, 0, 0);
try {
Drawable d = a.getDrawable(R.styleable.ShadowDrawable_android_src);
if (d == null) {
throw new XmlPullParserException("missing src attribute");
}
mState.mShadowColor = a.getColor(
R.styleable.ShadowDrawable_android_shadowColor, Color.BLACK);
mState.mShadowSize = a.getDimensionPixelSize(
R.styleable.ShadowDrawable_android_elevation, 0);
mState.mDarkTintColor = a.getColor(
R.styleable.ShadowDrawable_darkTintColor, Color.BLACK);
mState.mIntrinsicHeight = d.getIntrinsicHeight() + 2 * mState.mShadowSize;
mState.mIntrinsicWidth = d.getIntrinsicWidth() + 2 * mState.mShadowSize;
mState.mChangingConfigurations = d.getChangingConfigurations();
mState.mChildState = d.getConstantState();
} finally {
a.recycle();
}
}
private static class ShadowDrawableState extends ConstantState {
int mChangingConfigurations;
int mIntrinsicWidth;
int mIntrinsicHeight;
int mShadowColor;
int mShadowSize;
int mDarkTintColor;
boolean mIsDark;
Bitmap mLastDrawnBitmap;
ConstantState mChildState;
@Override
public Drawable newDrawable() {
return new ShadowDrawable(this);
}
@Override
public int getChangingConfigurations() {
return mChangingConfigurations;
}
@Override
public boolean canApplyTheme() {
return true;
}
}
}
|
