gecko-dev/mobile/android/base/GeckoMenuInflater.java

138 lines
4.7 KiB
Java

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko;
import java.io.IOException;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import android.app.Activity;
import android.content.Context;
import android.content.res.TypedArray;
import android.content.res.XmlResourceParser;
import android.util.AttributeSet;
import android.util.Log;
import android.util.Xml;
import android.view.InflateException;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.SubMenu;
import android.view.View;
public class GeckoMenuInflater extends MenuInflater
implements MenuItem.OnMenuItemClickListener {
private static final String LOGTAG = "GeckoMenuInflater";
private static final String TAG_ITEM = "item";
private static final int NO_ID = 0;
private Context mContext;
// Private class to hold the parsed menu item.
private class ParsedItem {
public int id;
public int order;
public CharSequence title;
public int iconRes;
public boolean checkable;
public boolean checked;
public boolean visible;
public boolean enabled;
public boolean showAsAction;
}
public GeckoMenuInflater(Context context) {
super(context);
mContext = context;
}
public void inflate(int menuRes, Menu menu) {
// This is a very minimal parser for the custom menu.
// This assumes that there is only one menu tag in the resource file.
// This does not support sub-menus.
XmlResourceParser parser = null;
try {
parser = mContext.getResources().getXml(menuRes);
AttributeSet attrs = Xml.asAttributeSet(parser);
ParsedItem item = null;
String tag;
int eventType = parser.getEventType();
do {
tag = parser.getName();
switch (eventType) {
case XmlPullParser.START_TAG:
if (tag.equals(TAG_ITEM)) {
// Parse the menu item.
item = new ParsedItem();
parseItem(item, attrs);
}
break;
case XmlPullParser.END_TAG:
if (parser.getName().equals(TAG_ITEM)) {
// Add the item.
MenuItem menuItem = menu.add(NO_ID, item.id, item.order, item.title);
setValues(item, menuItem);
menuItem.setOnMenuItemClickListener(this);
}
break;
}
eventType = parser.next();
} while (eventType != XmlPullParser.END_DOCUMENT);
} catch (XmlPullParserException e) {
throw new InflateException("Error inflating menu XML", e);
} catch (IOException e) {
throw new InflateException("Error inflating menu XML", e);
} finally {
if (parser != null)
parser.close();
}
}
@Override
public boolean onMenuItemClick(MenuItem item) {
Activity activity = (Activity) mContext;
boolean result = activity.onOptionsItemSelected(item);
activity.closeOptionsMenu();
return result;
}
public void parseItem(ParsedItem item, AttributeSet attrs) {
TypedArray a = mContext.obtainStyledAttributes(attrs, R.styleable.MenuItem);
item.id = a.getResourceId(R.styleable.MenuItem_id, NO_ID);
item.order = a.getInt(R.styleable.MenuItem_orderInCategory, 0);
item.title = a.getText(R.styleable.MenuItem_title);
item.iconRes = a.getResourceId(R.styleable.MenuItem_icon, 0);
item.checkable = a.getBoolean(R.styleable.MenuItem_checkable, false);
item.checked = a.getBoolean(R.styleable.MenuItem_checked, false);
item.visible = a.getBoolean(R.styleable.MenuItem_visible, true);
item.enabled = a.getBoolean(R.styleable.MenuItem_enabled, true);
item.showAsAction = a.getBoolean(R.styleable.MenuItem_showAsAction, false);
a.recycle();
}
public void setValues(ParsedItem item, MenuItem menuItem) {
menuItem.setChecked(item.checked)
.setVisible(item.visible)
.setEnabled(item.enabled)
.setCheckable(item.checkable)
.setIcon(item.iconRes)
.setShowAsAction(item.showAsAction ? 1 : 0);
}
}