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/* 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.menu;
import java.io.IOException;
import org.mozilla.gecko.AppConstants.Versions;
import org.mozilla.gecko.R;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import android.content.Context;
import android.content.res.TypedArray;
import android.content.res.XmlResourceParser;
import android.util.AttributeSet;
import android.util.Xml;
import android.view.InflateException;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.SubMenu;
public class GeckoMenuInflater extends MenuInflater {
private static final String TAG_MENU = "menu";
private static final String TAG_ITEM = "item";
private static final int NO_ID = 0;
private final 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 int showAsAction;
public boolean hasSubMenu;
}
public GeckoMenuInflater(Context context) {
super(context);
mContext = context;
}
@Override
public void inflate(int menuRes, Menu menu) {
// This does not check for a well-formed XML.
XmlResourceParser parser = null;
try {
parser = mContext.getResources().getXml(menuRes);
AttributeSet attrs = Xml.asAttributeSet(parser);
parseMenu(parser, attrs, menu);
} catch (XmlPullParserException | IOException e) {
throw new InflateException("Error inflating menu XML", e);
} finally {
if (parser != null)
parser.close();
}
}
private void parseMenu(XmlResourceParser parser, AttributeSet attrs, Menu menu)
throws XmlPullParserException, IOException {
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);
} else if (tag.equals(TAG_MENU)) {
if (item != null) {
// Add the submenu item.
SubMenu subMenu = menu.addSubMenu(NO_ID, item.id, item.order, item.title);
item.hasSubMenu = true;
// Set the menu item in main menu.
MenuItem menuItem = subMenu.getItem();
setValues(item, menuItem);
// Start parsing the sub menu.
parseMenu(parser, attrs, subMenu);
}
}
break;
case XmlPullParser.END_TAG:
if (parser.getName().equals(TAG_ITEM)) {
if (!item.hasSubMenu) {
// Add the item.
MenuItem menuItem = menu.add(NO_ID, item.id, item.order, item.title);
setValues(item, menuItem);
}
} else if (tag.equals(TAG_MENU)) {
return;
}
break;
}
eventType = parser.next();
} while (eventType != XmlPullParser.END_DOCUMENT);
}
public void parseItem(ParsedItem item, AttributeSet attrs) {
TypedArray a = mContext.obtainStyledAttributes(attrs, R.styleable.MenuItem);
item.id = a.getResourceId(R.styleable.MenuItem_android_id, NO_ID);
item.order = a.getInt(R.styleable.MenuItem_android_orderInCategory, 0);
item.title = a.getText(R.styleable.MenuItem_android_title);
item.checkable = a.getBoolean(R.styleable.MenuItem_android_checkable, false);
item.checked = a.getBoolean(R.styleable.MenuItem_android_checked, false);
item.visible = a.getBoolean(R.styleable.MenuItem_android_visible, true);
item.enabled = a.getBoolean(R.styleable.MenuItem_android_enabled, true);
item.hasSubMenu = false;
item.iconRes = a.getResourceId(R.styleable.MenuItem_android_icon, 0);
item.showAsAction = a.getInt(R.styleable.MenuItem_android_showAsAction, 0);
a.recycle();
}
public void setValues(ParsedItem item, MenuItem menuItem) {
// We are blocking any presenter updates during inflation.
GeckoMenuItem geckoItem = null;
if (menuItem instanceof GeckoMenuItem) {
geckoItem = (GeckoMenuItem) menuItem;
}
if (geckoItem != null) {
geckoItem.stopDispatchingChanges();
}
menuItem.setChecked(item.checked)
.setVisible(item.visible)
.setEnabled(item.enabled)
.setCheckable(item.checkable)
.setIcon(item.iconRes);
menuItem.setShowAsAction(item.showAsAction);
if (geckoItem != null) {
// We don't need to allow presenter updates during inflation,
// so we use the weak form of re-enabling changes.
geckoItem.resumeDispatchingChanges();
}
}
}
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