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/*
* Copyright (C) 2007 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 android.preference;
import com.android.internal.util.XmlUtils;
import java.io.IOException;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import android.content.Context;
import android.content.Intent;
import android.util.AttributeSet;
/**
* The {@link PreferenceInflater} is used to inflate preference hierarchies from
* XML files.
* <p>
* Do not construct this directly, instead use
* {@link Context#getSystemService(String)} with
* {@link Context#PREFERENCE_INFLATER_SERVICE}.
*/
class PreferenceInflater extends GenericInflater<Preference, PreferenceGroup> {
private static final String TAG = "PreferenceInflater";
private static final String INTENT_TAG_NAME = "intent";
private static final String EXTRA_TAG_NAME = "extra";
private PreferenceManager mPreferenceManager;
public PreferenceInflater(Context context, PreferenceManager preferenceManager) {
super(context);
init(preferenceManager);
}
PreferenceInflater(GenericInflater<Preference, PreferenceGroup> original, PreferenceManager preferenceManager, Context newContext) {
super(original, newContext);
init(preferenceManager);
}
@Override
public GenericInflater<Preference, PreferenceGroup> cloneInContext(Context newContext) {
return new PreferenceInflater(this, mPreferenceManager, newContext);
}
private void init(PreferenceManager preferenceManager) {
mPreferenceManager = preferenceManager;
setDefaultPackage("android.preference.");
}
@Override
protected boolean onCreateCustomFromTag(XmlPullParser parser, Preference parentPreference,
AttributeSet attrs) throws XmlPullParserException {
final String tag = parser.getName();
if (tag.equals(INTENT_TAG_NAME)) {
Intent intent = null;
try {
intent = Intent.parseIntent(getContext().getResources(), parser, attrs);
} catch (IOException e) {
XmlPullParserException ex = new XmlPullParserException(
"Error parsing preference");
ex.initCause(e);
throw ex;
}
if (intent != null) {
parentPreference.setIntent(intent);
}
return true;
} else if (tag.equals(EXTRA_TAG_NAME)) {
getContext().getResources().parseBundleExtra(EXTRA_TAG_NAME, attrs,
parentPreference.getExtras());
try {
XmlUtils.skipCurrentTag(parser);
} catch (IOException e) {
XmlPullParserException ex = new XmlPullParserException(
"Error parsing preference");
ex.initCause(e);
throw ex;
}
return true;
}
return false;
}
@Override
protected PreferenceGroup onMergeRoots(PreferenceGroup givenRoot, boolean attachToGivenRoot,
PreferenceGroup xmlRoot) {
// If we were given a Preferences, use it as the root (ignoring the root
// Preferences from the XML file).
if (givenRoot == null) {
xmlRoot.onAttachedToHierarchy(mPreferenceManager);
return xmlRoot;
} else {
return givenRoot;
}
}
}
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