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
|
/*
* Copyright (C) 2012 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 android.text.style;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.graphics.Paint;
import android.os.LocaleList;
import android.os.Parcel;
import android.text.ParcelableSpan;
import android.text.TextPaint;
import android.text.TextUtils;
import com.android.internal.util.Preconditions;
import java.util.Locale;
/**
* Changes the {@link Locale} of the text to which the span is attached.
*/
public class LocaleSpan extends MetricAffectingSpan implements ParcelableSpan {
@NonNull
private final LocaleList mLocales;
/**
* Creates a {@link LocaleSpan} from a well-formed {@link Locale}. Note that only
* {@link Locale} objects that can be created by {@link Locale#forLanguageTag(String)} are
* supported.
*
* <p><b>Caveat:</b> Do not specify any {@link Locale} object that cannot be created by
* {@link Locale#forLanguageTag(String)}. {@code new Locale(" a ", " b c", " d")} is an
* example of such a malformed {@link Locale} object.</p>
*
* @param locale The {@link Locale} of the text to which the span is attached.
*
* @see #LocaleSpan(LocaleList)
*/
public LocaleSpan(@Nullable Locale locale) {
mLocales = locale == null ? LocaleList.getEmptyLocaleList() : new LocaleList(locale);
}
/**
* Creates a {@link LocaleSpan} from {@link LocaleList}.
*
* @param locales The {@link LocaleList} of the text to which the span is attached.
* @throws NullPointerException if {@code locales} is null
*/
public LocaleSpan(@NonNull LocaleList locales) {
Preconditions.checkNotNull(locales, "locales cannot be null");
mLocales = locales;
}
public LocaleSpan(Parcel source) {
mLocales = LocaleList.CREATOR.createFromParcel(source);
}
@Override
public int getSpanTypeId() {
return getSpanTypeIdInternal();
}
/** @hide */
public int getSpanTypeIdInternal() {
return TextUtils.LOCALE_SPAN;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
writeToParcelInternal(dest, flags);
}
/** @hide */
public void writeToParcelInternal(Parcel dest, int flags) {
mLocales.writeToParcel(dest, flags);
}
/**
* @return The {@link Locale} for this span. If multiple locales are associated with this
* span, only the first locale is returned. {@code null} if no {@link Locale} is specified.
*
* @see LocaleList#get(int)
* @see #getLocales()
*/
@Nullable
public Locale getLocale() {
return mLocales.get(0);
}
/**
* @return The entire list of locales that are associated with this span.
*/
@NonNull
public LocaleList getLocales() {
return mLocales;
}
@Override
public void updateDrawState(TextPaint ds) {
apply(ds, mLocales);
}
@Override
public void updateMeasureState(TextPaint paint) {
apply(paint, mLocales);
}
private static void apply(@NonNull Paint paint, @NonNull LocaleList locales) {
paint.setTextLocales(locales);
}
}
|
