DictionaryPackInstallBroadcastReceiver.java revision 0cc0544a2995c7eb54a830ae54db60af89d4073d 
1/*
2 * Copyright (C) 2011 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.inputmethod.latin;
18
19import com.android.inputmethod.dictionarypack.UpdateHandler;
20
21import android.content.BroadcastReceiver;
22import android.content.Context;
23import android.content.Intent;
24import android.content.pm.PackageInfo;
25import android.content.pm.PackageManager;
26import android.content.pm.ProviderInfo;
27import android.net.Uri;
28
29/**
30 * Takes action to reload the necessary data when a dictionary pack was added/removed.
31 */
32public final class DictionaryPackInstallBroadcastReceiver extends BroadcastReceiver {
33
34    final LatinIME mService;
35    /**
36     * The action of the intent for publishing that new dictionary data is available.
37     */
38    /* package */ static final String NEW_DICTIONARY_INTENT_ACTION =
39            UpdateHandler.NEW_DICTIONARY_INTENT_ACTION;
40
41    public DictionaryPackInstallBroadcastReceiver(final LatinIME service) {
42        mService = service;
43    }
44
45    @Override
46    public void onReceive(Context context, Intent intent) {
47        final String action = intent.getAction();
48        final PackageManager manager = context.getPackageManager();
49
50        // We need to reread the dictionary if a new dictionary package is installed.
51        if (action.equals(Intent.ACTION_PACKAGE_ADDED)) {
52            final Uri packageUri = intent.getData();
53            if (null == packageUri) return; // No package name : we can't do anything
54            final String packageName = packageUri.getSchemeSpecificPart();
55            if (null == packageName) return;
56            // TODO: do this in a more appropriate place
57            TargetApplicationGetter.removeApplicationInfoCache(packageName);
58            final PackageInfo packageInfo;
59            try {
60                packageInfo = manager.getPackageInfo(packageName, PackageManager.GET_PROVIDERS);
61            } catch (android.content.pm.PackageManager.NameNotFoundException e) {
62                return; // No package info : we can't do anything
63            }
64            final ProviderInfo[] providers = packageInfo.providers;
65            if (null == providers) return; // No providers : it is not a dictionary.
66
67            // Search for some dictionary pack in the just-installed package. If found, reread.
68            for (ProviderInfo info : providers) {
69                if (BinaryDictionary.DICTIONARY_PACK_AUTHORITY.equals(info.authority)) {
70                    mService.resetSuggestMainDict();
71                    return;
72                }
73            }
74            // If we come here none of the authorities matched the one we searched for.
75            // We can exit safely.
76            return;
77        } else if (action.equals(Intent.ACTION_PACKAGE_REMOVED)
78                && !intent.getBooleanExtra(Intent.EXTRA_REPLACING, false)) {
79            // When the dictionary package is removed, we need to reread dictionary (to use the
80            // next-priority one, or stop using a dictionary at all if this was the only one,
81            // since this is the user request).
82            // If we are replacing the package, we will receive ADDED right away so no need to
83            // remove the dictionary at the moment, since we will do it when we receive the
84            // ADDED broadcast.
85
86            // TODO: Only reload dictionary on REMOVED when the removed package is the one we
87            // read dictionary from?
88            mService.resetSuggestMainDict();
89        } else if (action.equals(NEW_DICTIONARY_INTENT_ACTION)) {
90            mService.resetSuggestMainDict();
91        }
92    }
93}
94