1/*
2 * Copyright (C) 2007 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 android.preference;
18
19import com.android.internal.util.XmlUtils;
20
21import java.io.IOException;
22import java.util.Map;
23
24import org.xmlpull.v1.XmlPullParser;
25import org.xmlpull.v1.XmlPullParserException;
26
27import android.app.AliasActivity;
28import android.content.Context;
29import android.content.Intent;
30import android.util.AttributeSet;
31import android.util.Log;
32
33/**
34 * The {@link PreferenceInflater} is used to inflate preference hierarchies from
35 * XML files.
36 * <p>
37 * Do not construct this directly, instead use
38 * {@link Context#getSystemService(String)} with
39 * {@link Context#PREFERENCE_INFLATER_SERVICE}.
40 */
41class PreferenceInflater extends GenericInflater<Preference, PreferenceGroup> {
42    private static final String TAG = "PreferenceInflater";
43    private static final String INTENT_TAG_NAME = "intent";
44    private static final String EXTRA_TAG_NAME = "extra";
45
46    private PreferenceManager mPreferenceManager;
47
48    public PreferenceInflater(Context context, PreferenceManager preferenceManager) {
49        super(context);
50        init(preferenceManager);
51    }
52
53    PreferenceInflater(GenericInflater<Preference, PreferenceGroup> original, PreferenceManager preferenceManager, Context newContext) {
54        super(original, newContext);
55        init(preferenceManager);
56    }
57
58    @Override
59    public GenericInflater<Preference, PreferenceGroup> cloneInContext(Context newContext) {
60        return new PreferenceInflater(this, mPreferenceManager, newContext);
61    }
62
63    private void init(PreferenceManager preferenceManager) {
64        mPreferenceManager = preferenceManager;
65        setDefaultPackage("android.preference.");
66    }
67
68    @Override
69    protected boolean onCreateCustomFromTag(XmlPullParser parser, Preference parentPreference,
70            AttributeSet attrs) throws XmlPullParserException {
71        final String tag = parser.getName();
72
73        if (tag.equals(INTENT_TAG_NAME)) {
74            Intent intent = null;
75
76            try {
77                intent = Intent.parseIntent(getContext().getResources(), parser, attrs);
78            } catch (IOException e) {
79                XmlPullParserException ex = new XmlPullParserException(
80                        "Error parsing preference");
81                ex.initCause(e);
82                throw ex;
83            }
84
85            if (intent != null) {
86                parentPreference.setIntent(intent);
87            }
88
89            return true;
90        } else if (tag.equals(EXTRA_TAG_NAME)) {
91            getContext().getResources().parseBundleExtra(EXTRA_TAG_NAME, attrs,
92                    parentPreference.getExtras());
93            try {
94                XmlUtils.skipCurrentTag(parser);
95            } catch (IOException e) {
96                XmlPullParserException ex = new XmlPullParserException(
97                        "Error parsing preference");
98                ex.initCause(e);
99                throw ex;
100            }
101            return true;
102        }
103
104        return false;
105    }
106
107    @Override
108    protected PreferenceGroup onMergeRoots(PreferenceGroup givenRoot, boolean attachToGivenRoot,
109            PreferenceGroup xmlRoot) {
110        // If we were given a Preferences, use it as the root (ignoring the root
111        // Preferences from the XML file).
112        if (givenRoot == null) {
113            xmlRoot.onAttachedToHierarchy(mPreferenceManager);
114            return xmlRoot;
115        } else {
116            return givenRoot;
117        }
118    }
119
120}
121