summaryrefslogtreecommitdiffstats
path: root/src/com/android/camera/ComboPreferences.java
blob: b8705ccc29d731bf67bba1063e44b24fd7304546 (plain)
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
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
/*
 * Copyright (C) 2010 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.camera;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.preference.PreferenceManager;

import java.util.Map;
import java.util.Set;
import java.util.WeakHashMap;
import java.util.concurrent.CopyOnWriteArrayList;

public class ComboPreferences implements SharedPreferences, OnSharedPreferenceChangeListener {
    private SharedPreferences mPrefGlobal;  // global preferences
    private SharedPreferences mPrefLocal;  // per-camera preferences
    private CopyOnWriteArrayList<OnSharedPreferenceChangeListener> mListeners;
    private static WeakHashMap<Context, ComboPreferences> sMap =
            new WeakHashMap<Context, ComboPreferences>();

    public ComboPreferences(Context context) {
        mPrefGlobal = PreferenceManager.getDefaultSharedPreferences(context);
        mPrefGlobal.registerOnSharedPreferenceChangeListener(this);
        synchronized (sMap) {
            sMap.put(context, this);
        }
        mListeners = new CopyOnWriteArrayList<OnSharedPreferenceChangeListener>();
    }

    public static ComboPreferences get(Context context) {
        synchronized (sMap) {
            return sMap.get(context);
        }
    }

    // Sets the camera id and reads its preferences. Each camera has its own
    // preferences.
    public void setLocalId(Context context, int cameraId) {
        String prefName = context.getPackageName() + "_preferences_" + cameraId;
        if (mPrefLocal != null) {
            mPrefLocal.unregisterOnSharedPreferenceChangeListener(this);
        }
        mPrefLocal = context.getSharedPreferences(
                prefName, Context.MODE_PRIVATE);
        mPrefLocal.registerOnSharedPreferenceChangeListener(this);
    }

    public SharedPreferences getGlobal() {
        return mPrefGlobal;
    }

    public SharedPreferences getLocal() {
        return mPrefLocal;
    }

    public Map<String, ?> getAll() {
        throw new UnsupportedOperationException(); // Can be implemented if needed.
    }

    private static boolean isGlobal(String key) {
        return key.equals(CameraSettings.KEY_VIDEO_TIME_LAPSE_FRAME_INTERVAL)
                || key.equals(CameraSettings.KEY_CAMERA_ID)
                || key.equals(CameraSettings.KEY_RECORD_LOCATION);
    }

    public String getString(String key, String defValue) {
        if (isGlobal(key) || !mPrefLocal.contains(key)) {
            return mPrefGlobal.getString(key, defValue);
        } else {
            return mPrefLocal.getString(key, defValue);
        }
    }

    public int getInt(String key, int defValue) {
        if (isGlobal(key) || !mPrefLocal.contains(key)) {
            return mPrefGlobal.getInt(key, defValue);
        } else {
            return mPrefLocal.getInt(key, defValue);
        }
    }

    public long getLong(String key, long defValue) {
        if (isGlobal(key) || !mPrefLocal.contains(key)) {
            return mPrefGlobal.getLong(key, defValue);
        } else {
            return mPrefLocal.getLong(key, defValue);
        }
    }

    public float getFloat(String key, float defValue) {
        if (isGlobal(key) || !mPrefLocal.contains(key)) {
            return mPrefGlobal.getFloat(key, defValue);
        } else {
            return mPrefLocal.getFloat(key, defValue);
        }
    }

    public boolean getBoolean(String key, boolean defValue) {
        if (isGlobal(key) || !mPrefLocal.contains(key)) {
            return mPrefGlobal.getBoolean(key, defValue);
        } else {
            return mPrefLocal.getBoolean(key, defValue);
        }
    }

    // This method is not used.
    public Set<String> getStringSet(String key, Set<String> defValues) {
        throw new UnsupportedOperationException();
    }

    public boolean contains(String key) {
        if (mPrefLocal.contains(key)) return true;
        if (mPrefGlobal.contains(key)) return true;
        return false;
    }

    private class MyEditor implements Editor {
        private Editor mEditorGlobal;
        private Editor mEditorLocal;

        MyEditor() {
            mEditorGlobal = mPrefGlobal.edit();
            mEditorLocal = mPrefLocal.edit();
        }

        public boolean commit() {
            boolean result1 = mEditorGlobal.commit();
            boolean result2 = mEditorLocal.commit();
            return result1 && result2;
        }

        public void apply() {
            mEditorGlobal.apply();
            mEditorLocal.apply();
        }

        // Note: clear() and remove() affects both local and global preferences.
        public Editor clear() {
            mEditorGlobal.clear();
            mEditorLocal.clear();
            return this;
        }

        public Editor remove(String key) {
            mEditorGlobal.remove(key);
            mEditorLocal.remove(key);
            return this;
        }

        public Editor putString(String key, String value) {
            if (isGlobal(key)) {
                mEditorGlobal.putString(key, value);
            } else {
                mEditorLocal.putString(key, value);
            }
            return this;
        }

        public Editor putInt(String key, int value) {
            if (isGlobal(key)) {
                mEditorGlobal.putInt(key, value);
            } else {
                mEditorLocal.putInt(key, value);
            }
            return this;
        }

        public Editor putLong(String key, long value) {
            if (isGlobal(key)) {
                mEditorGlobal.putLong(key, value);
            } else {
                mEditorLocal.putLong(key, value);
            }
            return this;
        }

        public Editor putFloat(String key, float value) {
            if (isGlobal(key)) {
                mEditorGlobal.putFloat(key, value);
            } else {
                mEditorLocal.putFloat(key, value);
            }
            return this;
        }

        public Editor putBoolean(String key, boolean value) {
            if (isGlobal(key)) {
                mEditorGlobal.putBoolean(key, value);
            } else {
                mEditorLocal.putBoolean(key, value);
            }
            return this;
        }

        // This method is not used.
        public Editor putStringSet(String key, Set<String> values) {
            throw new UnsupportedOperationException();
        }
    }

    // Note the remove() and clear() of the returned Editor may not work as
    // expected because it doesn't touch the global preferences at all.
    public Editor edit() {
        return new MyEditor();
    }

    public void registerOnSharedPreferenceChangeListener(
            OnSharedPreferenceChangeListener listener) {
        mListeners.add(listener);
    }

    public void unregisterOnSharedPreferenceChangeListener(
            OnSharedPreferenceChangeListener listener) {
        mListeners.remove(listener);
    }

    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
            String key) {
        for (OnSharedPreferenceChangeListener listener : mListeners) {
            listener.onSharedPreferenceChanged(this, key);
        }
    }
}