SearchableSources.java revision 21bff9bbf4286907b01d3153bff2fbd6b5ec5df8 
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 android.app.SearchManager;
20import android.app.SearchableInfo;
21import android.content.ComponentName;
22import android.content.Context;
23import android.content.Intent;
24import android.content.pm.PackageManager;
25import android.content.pm.PackageManager.NameNotFoundException;
26import android.util.Log;
27
28import java.util.Collection;
29import java.util.HashMap;
30import java.util.List;
31
32/**
33 * Maintains a list of search sources.
34 */
35public class SearchableSources implements Sources {
36
37    // set to true to enable the more verbose debug logging for this file
38    private static final boolean DBG = false;
39    private static final String TAG = "QSB.SearchableSources";
40
41    private final Context mContext;
42    private final SearchManager mSearchManager;
43
44    // All suggestion sources, by name.
45    private HashMap<String, Source> mSources;
46
47    // The web search source to use.
48    private Source mWebSearchSource;
49
50    /**
51     *
52     * @param context Used for looking up source information etc.
53     */
54    public SearchableSources(Context context) {
55        mContext = context;
56        mSearchManager = (SearchManager) context.getSystemService(Context.SEARCH_SERVICE);
57    }
58
59    public Collection<Source> getSources() {
60        return mSources.values();
61    }
62
63    public Source getSource(String name) {
64        return mSources.get(name);
65    }
66
67    public Source getWebSearchSource() {
68        return mWebSearchSource;
69    }
70
71    /**
72     * Updates the list of suggestion sources.
73     */
74    public void update() {
75        if (DBG) Log.d(TAG, "update()");
76        mSources = new HashMap<String,Source>();
77
78        addSearchableSources();
79
80        mWebSearchSource = createWebSearchSource();
81        addSource(mWebSearchSource);
82    }
83
84    private void addSearchableSources() {
85        List<SearchableInfo> searchables = mSearchManager.getSearchablesInGlobalSearch();
86        if (searchables == null) {
87            Log.e(TAG, "getSearchablesInGlobalSearch() returned null");
88            return;
89        }
90        for (SearchableInfo searchable : searchables) {
91            SearchableSource source = createSearchableSource(searchable);
92            if (source != null) {
93                if (DBG) Log.d(TAG, "Created source " + source);
94                addSource(source);
95            }
96        }
97    }
98
99    private void addSource(Source source) {
100        mSources.put(source.getName(), source);
101    }
102
103    private Source createWebSearchSource() {
104        ComponentName name = getWebSearchComponent();
105        SearchableInfo webSearchable = mSearchManager.getSearchableInfo(name);
106        if (webSearchable == null) {
107            Log.e(TAG, "Web search source " + name + " is not searchable.");
108            return null;
109        }
110        return createSearchableSource(webSearchable);
111    }
112
113    private ComponentName getWebSearchComponent() {
114        // Looks for an activity in the current package that handles ACTION_WEB_SEARCH.
115        // This indirect method is used to allow easy replacement of the web
116        // search activity when extending this package.
117        Intent webSearchIntent = new Intent(Intent.ACTION_WEB_SEARCH);
118        webSearchIntent.setPackage(mContext.getPackageName());
119        PackageManager pm = mContext.getPackageManager();
120        return webSearchIntent.resolveActivity(pm);
121    }
122
123    private SearchableSource createSearchableSource(SearchableInfo searchable) {
124        if (searchable == null) return null;
125        try {
126            return new SearchableSource(mContext, searchable);
127        } catch (NameNotFoundException ex) {
128            Log.e(TAG, "Source not found: " + ex);
129            return null;
130        }
131    }
132}
133