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
|
/*
* Copyright (C) 2013 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.mail.photomanager;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint.Align;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.text.TextPaint;
import android.text.TextUtils;
import com.android.mail.R;
import com.android.mail.bitmap.ColorPicker;
import com.android.mail.ui.ImageCanvas.Dimensions;
import com.android.mail.utils.BitmapUtil;
import com.android.mail.utils.LogTag;
import com.android.mail.utils.LogUtils;
/**
* LetterTileProvider is an implementation of the DefaultImageProvider. When no
* matching contact photo is found, and there is a supplied displayName or email
* address whose first letter corresponds to an English alphabet letter (or
* number), this method creates a bitmap with the letter in the center of a
* tile. If there is no English alphabet character (or digit), it creates a
* bitmap with the default contact avatar.
*/
public class LetterTileProvider {
private static final String TAG = LogTag.getLogTag();
private final Bitmap mDefaultBitmap;
private final Bitmap[] mBitmapBackgroundCache;
private final Bitmap[] mDefaultBitmapCache;
private final Typeface mSansSerifLight;
private final Rect mBounds;
private final int mTileLetterFontSize;
private final int mTileLetterFontSizeSmall;
private final int mTileFontColor;
private final TextPaint mPaint = new TextPaint();
private final Canvas mCanvas = new Canvas();
private final char[] mFirstChar = new char[1];
private static final int POSSIBLE_BITMAP_SIZES = 3;
private final ColorPicker mTileColorPicker;
public LetterTileProvider(Resources res) {
this(res, new ColorPicker.PaletteColorPicker(res));
}
public LetterTileProvider(Resources res, ColorPicker colorPicker) {
mTileLetterFontSize = res.getDimensionPixelSize(R.dimen.tile_letter_font_size_small);
mTileLetterFontSizeSmall = res.getDimensionPixelSize(R.dimen.tile_letter_font_size_tiny);
mTileFontColor = res.getColor(R.color.letter_tile_font_color);
mSansSerifLight = Typeface.create("sans-serif-light", Typeface.NORMAL);
mBounds = new Rect();
mPaint.setTypeface(mSansSerifLight);
mPaint.setColor(mTileFontColor);
mPaint.setTextAlign(Align.CENTER);
mPaint.setAntiAlias(true);
mBitmapBackgroundCache = new Bitmap[POSSIBLE_BITMAP_SIZES];
mDefaultBitmap = BitmapFactory.decodeResource(res, R.drawable.ic_anonymous_avatar_40dp);
mDefaultBitmapCache = new Bitmap[POSSIBLE_BITMAP_SIZES];
mTileColorPicker = colorPicker;
}
public Bitmap getLetterTile(final Dimensions dimensions, final String displayName,
final String address) {
final String display = !TextUtils.isEmpty(displayName) ? displayName : address;
final char firstChar = display.charAt(0);
// get an empty bitmap
final Bitmap bitmap = getBitmap(dimensions, false /* getDefault */);
if (bitmap == null) {
LogUtils.w(TAG, "LetterTileProvider width(%d) or height(%d) is 0 for name %s and "
+ "address %s.", dimensions.width, dimensions.height, displayName, address);
return null;
}
final Canvas c = mCanvas;
c.setBitmap(bitmap);
c.drawColor(mTileColorPicker.pickColor(address));
// If its a valid English alphabet letter,
// draw the letter on top of the color
if (isEnglishLetterOrDigit(firstChar)) {
mFirstChar[0] = Character.toUpperCase(firstChar);
mPaint.setTextSize(
dimensions.fontSize > 0 ? dimensions.fontSize : getFontSize(dimensions.scale));
mPaint.getTextBounds(mFirstChar, 0, 1, mBounds);
c.drawText(mFirstChar, 0, 1, 0 + dimensions.width / 2,
0 + dimensions.height / 2 + (mBounds.bottom - mBounds.top) / 2, mPaint);
} else { // draw the generic icon on top
c.drawBitmap(getBitmap(dimensions, true /* getDefault */), 0, 0, null);
}
return bitmap;
}
private static boolean isEnglishLetterOrDigit(char c) {
return ('A' <= c && c <= 'Z')
|| ('a' <= c && c <= 'z')
|| ('0' <= c && c <= '9');
}
private Bitmap getBitmap(final Dimensions d, boolean getDefault) {
if (d.width <= 0 || d.height <= 0) {
LogUtils.w(TAG,
"LetterTileProvider width(%d) or height(%d) is 0.", d.width, d.height);
return null;
}
final int pos;
float scale = d.scale;
if (scale == Dimensions.SCALE_ONE) {
pos = 0;
} else if (scale == Dimensions.SCALE_HALF) {
pos = 1;
} else {
pos = 2;
}
final Bitmap[] cache = (getDefault) ? mDefaultBitmapCache : mBitmapBackgroundCache;
Bitmap bitmap = cache[pos];
// ensure bitmap is suitable for the desired w/h
// (two-pane uses two different sets of dimensions depending on pane width)
if (bitmap == null || bitmap.getWidth() != d.width || bitmap.getHeight() != d.height) {
// create and place the bitmap
if (getDefault) {
bitmap = BitmapUtil.centerCrop(mDefaultBitmap, d.width, d.height);
} else {
bitmap = Bitmap.createBitmap(d.width, d.height, Bitmap.Config.ARGB_8888);
}
cache[pos] = bitmap;
}
return bitmap;
}
private int getFontSize(float scale) {
if (scale == Dimensions.SCALE_ONE) {
return mTileLetterFontSize;
} else {
return mTileLetterFontSizeSmall;
}
}
}
|
