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
|
/*
* Copyright (C) 2010 Google Inc.
*
* 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.inputmethod.latin;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.text.TextUtils;
import java.util.ArrayList;
import java.util.Locale;
/**
* Keeps track of list of selected input languages and the current
* input language that the user has selected.
*/
public class LanguageSwitcher {
private final ArrayList<Locale> mLocales = new ArrayList<Locale>();
private final LatinIME mIme;
private String[] mSelectedLanguageArray;
private String mSelectedLanguages;
private int mCurrentIndex = 0;
private String mDefaultInputLanguage;
private Locale mDefaultInputLocale;
private Locale mSystemLocale;
public LanguageSwitcher(LatinIME ime) {
mIme = ime;
}
public int getLocaleCount() {
return mLocales.size();
}
/**
* Loads the currently selected input languages from shared preferences.
* @param sp
* @return whether there was any change
*/
public boolean loadLocales(SharedPreferences sp) {
String selectedLanguages = sp.getString(Settings.PREF_SELECTED_LANGUAGES, null);
String currentLanguage = sp.getString(Settings.PREF_INPUT_LANGUAGE, null);
if (selectedLanguages == null || selectedLanguages.length() < 1) {
loadDefaults();
if (mLocales.size() == 0) {
return false;
}
mLocales.clear();
return true;
}
if (selectedLanguages.equals(mSelectedLanguages)) {
return false;
}
mSelectedLanguageArray = selectedLanguages.split(",");
mSelectedLanguages = selectedLanguages; // Cache it for comparison later
constructLocales();
mCurrentIndex = 0;
if (currentLanguage != null) {
// Find the index
mCurrentIndex = 0;
for (int i = 0; i < mLocales.size(); i++) {
if (mSelectedLanguageArray[i].equals(currentLanguage)) {
mCurrentIndex = i;
break;
}
}
// If we didn't find the index, use the first one
}
return true;
}
private void loadDefaults() {
mDefaultInputLocale = mIme.getResources().getConfiguration().locale;
String country = mDefaultInputLocale.getCountry();
mDefaultInputLanguage = mDefaultInputLocale.getLanguage() +
(TextUtils.isEmpty(country) ? "" : "_" + country);
}
private void constructLocales() {
mLocales.clear();
for (final String lang : mSelectedLanguageArray) {
final Locale locale = new Locale(lang.substring(0, 2),
lang.length() > 4 ? lang.substring(3, 5) : "");
mLocales.add(locale);
}
}
/**
* Returns the currently selected input language code, or the display language code if
* no specific locale was selected for input.
*/
public String getInputLanguage() {
if (getLocaleCount() == 0) return mDefaultInputLanguage;
return mSelectedLanguageArray[mCurrentIndex];
}
/**
* Returns the list of enabled language codes.
*/
public String[] getEnabledLanguages() {
return mSelectedLanguageArray;
}
/**
* Returns the currently selected input locale, or the display locale if no specific
* locale was selected for input.
* @return
*/
public Locale getInputLocale() {
if (getLocaleCount() == 0) return mDefaultInputLocale;
return mLocales.get(mCurrentIndex);
}
private int nextLocaleIndex() {
final int size = mLocales.size();
return (mCurrentIndex + 1) % size;
}
private int prevLocaleIndex() {
final int size = mLocales.size();
return (mCurrentIndex - 1 + size) % size;
}
/**
* Returns the next input locale in the list. Wraps around to the beginning of the
* list if we're at the end of the list.
* @return
*/
public Locale getNextInputLocale() {
if (getLocaleCount() == 0) return mDefaultInputLocale;
return mLocales.get(nextLocaleIndex());
}
/**
* Sets the system locale (display UI) used for comparing with the input language.
* @param locale the locale of the system
*/
public void setSystemLocale(Locale locale) {
mSystemLocale = locale;
}
/**
* Returns the system locale.
* @return the system locale
*/
public Locale getSystemLocale() {
return mSystemLocale;
}
/**
* Returns the previous input locale in the list. Wraps around to the end of the
* list if we're at the beginning of the list.
* @return
*/
public Locale getPrevInputLocale() {
if (getLocaleCount() == 0) return mDefaultInputLocale;
return mLocales.get(prevLocaleIndex());
}
public void reset() {
mCurrentIndex = 0;
}
public void next() {
mCurrentIndex = nextLocaleIndex();
}
public void prev() {
mCurrentIndex = prevLocaleIndex();
}
public void persist(SharedPreferences prefs) {
Editor editor = prefs.edit();
editor.putString(Settings.PREF_INPUT_LANGUAGE, getInputLanguage());
SharedPreferencesCompat.apply(editor);
}
}
|
