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/*
* Copyright (C) 2012 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 com.android.gallery3d.actionbar;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.XmlResourceParser;
import android.util.AttributeSet;
import android.util.Xml;
import android.view.InflateException;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import java.io.IOException;
public class SimpleMenuInflater {
private static final String TAG_MENU = "menu";
private static final String TAG_ITEM = "item";
private final Context mContext;
public SimpleMenuInflater(Context context) {
mContext = context;
}
public SimpleMenu inflate(SimpleMenu menu, int menuRes) throws InflateException {
XmlResourceParser parser = mContext.getResources().getXml(menuRes);
try {
return inflateInternal(menu, parser);
} catch (XmlPullParserException e) {
throw new InflateException(e);
} catch (IOException e) {
throw new InflateException(e);
} finally {
if (parser != null) parser.close();
}
}
private SimpleMenu inflateInternal(SimpleMenu menu, XmlPullParser parser)
throws XmlPullParserException, IOException {
int eventType = parser.getEventType();
do {
if (eventType == XmlPullParser.START_TAG) {
String tagName = parser.getName();
if (TAG_MENU.equals(tagName)) {
eventType = parser.next();
break;
}
throw new RuntimeException("unexpected tag: " + tagName);
}
eventType = parser.next();
} while (eventType != XmlPullParser.END_DOCUMENT);
if (menu == null) menu = new SimpleMenu();
AttributeSet attrs = Xml.asAttributeSet(parser);
boolean reachedEndOfMenu = false;
while (!reachedEndOfMenu) {
switch (eventType) {
case XmlPullParser.START_TAG: {
String tagName = parser.getName();
if (TAG_ITEM.equals(tagName)) {
menu.addItem(parseItem(attrs));
} else if (TAG_MENU.equals(tagName)) {
throw new RuntimeException("nested menu not supported");
} else {
// ignore all other tags
parser.next();
}
break;
}
case XmlPullParser.END_TAG: {
String tagName = parser.getName();
if (TAG_MENU.equals(tagName)) {
reachedEndOfMenu = true;
break;
}
break;
}
case XmlPullParser.END_DOCUMENT: {
throw new RuntimeException("unexpected end of document");
}
}
eventType = parser.next();
}
return menu;
}
private static final String ATTR_ID = "id";
private static final String ATTR_ICON = "icon";
private static final String ATTR_TITLE = "title";
private static final String ATTR_VISIBLE = "visible";
private static final String ATTR_SHOW_AS_ACTION = "showAsAction";
private SimpleMenu.Item parseItem(AttributeSet attrs) {
SimpleMenu.Item item = new SimpleMenu.Item();
Resources res = mContext.getResources();
for (int i = 0, n = attrs.getAttributeCount(); i < n; ++i) {
String attrName = attrs.getAttributeName(i);
if (ATTR_ID.equals(attrName)) {
item.id = attrs.getAttributeResourceValue(i, 0);
} else if (ATTR_ICON.equals(attrName)) {
item.iconId = attrs.getAttributeResourceValue(i, 0);
} else if (ATTR_TITLE.equals(attrName)) {
int id = attrs.getAttributeResourceValue(i, 0);
item.title = id == 0 ? null : res.getString(id);
} else if (ATTR_VISIBLE.equals(attrName)) {
item.visible = attrs.getAttributeBooleanValue(i, true);
} else if (ATTR_SHOW_AS_ACTION.equals(attrName)) {
item.showAsAction = attrs.getAttributeIntValue(i, 0);
}
}
return item;
}
}
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