QsbApplication.java revision 816804b67619af133860a1e28e92f58bc642260d 
1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.quicksearchbox;
18
19import com.android.quicksearchbox.ui.DelayingSuggestionsAdapter;
20import com.android.quicksearchbox.ui.SuggestionViewFactory;
21import com.android.quicksearchbox.ui.SuggestionViewInflater;
22import com.android.quicksearchbox.ui.SuggestionsAdapter;
23
24import android.app.Application;
25import android.os.Handler;
26import android.os.Looper;
27
28import java.util.concurrent.ThreadFactory;
29
30public class QsbApplication extends Application {
31
32    private Handler mUiThreadHandler;
33    private Config mConfig;
34    private Sources mSources;
35    private ShortcutRepository mShortcutRepository;
36    private SourceTaskExecutor mSourceTaskExecutor;
37    private SuggestionsProvider mGlobalSuggestionsProvider;
38    private SuggestionViewFactory mSuggestionViewFactory;
39
40    @Override
41    public void onTerminate() {
42        close();
43        super.onTerminate();
44    }
45
46    protected void close() {
47        if (mSources != null) {
48            mSources.close();
49            mSources = null;
50        }
51        if (mShortcutRepository != null) {
52            mShortcutRepository.close();
53            mShortcutRepository = null;
54        }
55        if (mSourceTaskExecutor != null) {
56            mSourceTaskExecutor.close();
57            mSourceTaskExecutor = null;
58        }
59        if (mGlobalSuggestionsProvider != null) {
60            mGlobalSuggestionsProvider.close();
61            mGlobalSuggestionsProvider = null;
62        }
63    }
64
65    public Handler getUiThreadHandler() {
66        if (mUiThreadHandler == null) {
67            mUiThreadHandler = createUiThreadHandler();
68        }
69        return mUiThreadHandler;
70    }
71
72    protected Handler createUiThreadHandler() {
73        return new Handler(Looper.myLooper());
74    }
75
76    public Config getConfig() {
77        if (mConfig == null) {
78            mConfig = createConfig();
79        }
80        return mConfig;
81    }
82
83    protected Config createConfig() {
84        return new Config(this);
85    }
86
87    public SourceLookup getSources() {
88        if (mSources == null) {
89            mSources = createSources();
90        }
91        return mSources;
92    }
93
94    protected Sources createSources() {
95        Sources sources = new Sources(this, getConfig());
96        sources.load();
97        return sources;
98    }
99
100    public ShortcutRepository getShortcutRepository() {
101        if (mShortcutRepository == null) {
102            mShortcutRepository = createShortcutRepository();
103        }
104        return mShortcutRepository;
105    }
106
107    protected ShortcutRepository createShortcutRepository() {
108        return ShortcutRepositoryImplLog.create(this, getConfig(), getSources());
109    }
110
111    public SourceTaskExecutor getSourceTaskExecutor() {
112        if (mSourceTaskExecutor == null) {
113            mSourceTaskExecutor = createSourceTaskExecutor();
114        }
115        return mSourceTaskExecutor;
116    }
117
118    protected SourceTaskExecutor createSourceTaskExecutor() {
119        Config config = getConfig();
120        ThreadFactory queryThreadFactory =
121            new QueryThreadFactory(config.getQueryThreadPriority());
122        return new DelayingSourceTaskExecutor(config, queryThreadFactory);
123    }
124
125
126    public SuggestionsProvider getSuggestionsProvider(Source source) {
127        if (source == null) {
128            return getGlobalSuggestionsProvider();
129        }
130        // TODO: Cache this to avoid creating a new one for each key press
131        return createSuggestionsProvider(source);
132    }
133
134    protected SuggestionsProvider createSuggestionsProvider(Source source) {
135        // TODO: We could use simpler promoter here
136        Promoter promoter =  new ShortcutPromoter(new RoundRobinPromoter());
137        SingleSourceSuggestionsProvider provider = new SingleSourceSuggestionsProvider(getConfig(),
138                source,
139                getSourceTaskExecutor(),
140                getUiThreadHandler(),
141                promoter,
142                getShortcutRepository());
143        return provider;
144    }
145
146    public SuggestionsProvider getGlobalSuggestionsProvider() {
147        if (mGlobalSuggestionsProvider == null) {
148            mGlobalSuggestionsProvider = createGlobalSuggestionsProvider();
149        }
150        return mGlobalSuggestionsProvider;
151    }
152
153    protected SuggestionsProvider createGlobalSuggestionsProvider() {
154        Handler uiThread = new Handler(Looper.myLooper());
155        Promoter promoter =  new ShortcutPromoter(new RoundRobinPromoter());
156        GlobalSuggestionsProvider provider = new GlobalSuggestionsProvider(getConfig(),
157                getSources(),
158                getSourceTaskExecutor(),
159                uiThread,
160                promoter,
161                getShortcutRepository());
162        return provider;
163    }
164
165    public SuggestionViewFactory getSuggestionViewFactory() {
166        if (mSuggestionViewFactory == null) {
167            mSuggestionViewFactory = createSuggestionViewFactory();
168        }
169        return mSuggestionViewFactory;
170    }
171
172    protected SuggestionViewFactory createSuggestionViewFactory() {
173        return new SuggestionViewInflater(this);
174    }
175
176    public SuggestionsAdapter createSuggestionsAdapter() {
177        Config config = getConfig();
178        SuggestionViewFactory viewFactory = getSuggestionViewFactory();
179        DelayingSuggestionsAdapter adapter = new DelayingSuggestionsAdapter(viewFactory);
180        return adapter;
181    }
182}
183