michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.menu;
michael@0: 
michael@0: import org.mozilla.gecko.R;
michael@0: 
michael@0: import org.xmlpull.v1.XmlPullParser;
michael@0: import org.xmlpull.v1.XmlPullParserException;
michael@0: 
michael@0: import android.content.Context;
michael@0: import android.content.res.TypedArray;
michael@0: import android.content.res.XmlResourceParser;
michael@0: import android.os.Build;
michael@0: import android.util.AttributeSet;
michael@0: import android.util.Xml;
michael@0: import android.view.InflateException;
michael@0: import android.view.Menu;
michael@0: import android.view.MenuInflater;
michael@0: import android.view.MenuItem;
michael@0: import android.view.SubMenu;
michael@0: 
michael@0: import java.io.IOException;
michael@0: 
michael@0: public class GeckoMenuInflater extends MenuInflater { 
michael@0:     private static final String LOGTAG = "GeckoMenuInflater";
michael@0: 
michael@0:     private static final String TAG_MENU = "menu";
michael@0:     private static final String TAG_ITEM = "item";
michael@0:     private static final int NO_ID = 0;
michael@0: 
michael@0:     private Context mContext;
michael@0: 
michael@0:     // Private class to hold the parsed menu item. 
michael@0:     private class ParsedItem {
michael@0:         public int id;
michael@0:         public int order;
michael@0:         public CharSequence title;
michael@0:         public int iconRes;
michael@0:         public boolean checkable;
michael@0:         public boolean checked;
michael@0:         public boolean visible;
michael@0:         public boolean enabled;
michael@0:         public int showAsAction;
michael@0:         public boolean hasSubMenu;
michael@0:     }
michael@0: 
michael@0:     public GeckoMenuInflater(Context context) {
michael@0:         super(context);
michael@0:         mContext = context;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void inflate(int menuRes, Menu menu) {
michael@0: 
michael@0:         // This does not check for a well-formed XML.
michael@0: 
michael@0:         XmlResourceParser parser = null;
michael@0:         try {
michael@0:             parser = mContext.getResources().getXml(menuRes);
michael@0:             AttributeSet attrs = Xml.asAttributeSet(parser);
michael@0: 
michael@0:             parseMenu(parser, attrs, menu);
michael@0: 
michael@0:         } catch (XmlPullParserException e) {
michael@0:             throw new InflateException("Error inflating menu XML", e);
michael@0:         } catch (IOException e) {
michael@0:             throw new InflateException("Error inflating menu XML", e);
michael@0:         } finally {
michael@0:             if (parser != null)
michael@0:                 parser.close();
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private void parseMenu(XmlResourceParser parser, AttributeSet attrs, Menu menu) 
michael@0:                            throws XmlPullParserException, IOException {
michael@0:         ParsedItem item = null;
michael@0:    
michael@0:         String tag;
michael@0:         int eventType = parser.getEventType();
michael@0: 
michael@0:         do {
michael@0:             tag = parser.getName();
michael@0:     
michael@0:             switch (eventType) {
michael@0:                 case XmlPullParser.START_TAG:
michael@0:                     if (tag.equals(TAG_ITEM)) {
michael@0:                         // Parse the menu item.
michael@0:                         item = new ParsedItem();
michael@0:                         parseItem(item, attrs);
michael@0:                      } else if (tag.equals(TAG_MENU)) {
michael@0:                         if (item != null) {
michael@0:                             // Add the submenu item.
michael@0:                             SubMenu subMenu = menu.addSubMenu(NO_ID, item.id, item.order, item.title);
michael@0:                             item.hasSubMenu = true;
michael@0: 
michael@0:                             // Set the menu item in main menu.
michael@0:                             MenuItem menuItem = subMenu.getItem();
michael@0:                             setValues(item, menuItem);
michael@0: 
michael@0:                             // Start parsing the sub menu.
michael@0:                             parseMenu(parser, attrs, subMenu);
michael@0:                         }
michael@0:                     }
michael@0:                     break;
michael@0: 
michael@0:                 case XmlPullParser.END_TAG:
michael@0:                     if (parser.getName().equals(TAG_ITEM)) {
michael@0:                         if (!item.hasSubMenu) {
michael@0:                             // Add the item.
michael@0:                             MenuItem menuItem = menu.add(NO_ID, item.id, item.order, item.title);
michael@0:                             setValues(item, menuItem);
michael@0:                         }
michael@0:                     } else if (tag.equals(TAG_MENU)) {
michael@0:                         return;
michael@0:                     }
michael@0:                     break;
michael@0:             }
michael@0: 
michael@0:             eventType = parser.next();
michael@0: 
michael@0:         } while (eventType != XmlPullParser.END_DOCUMENT);
michael@0:     }
michael@0: 
michael@0:     public void parseItem(ParsedItem item, AttributeSet attrs) {
michael@0:         TypedArray a = mContext.obtainStyledAttributes(attrs, R.styleable.MenuItem);
michael@0: 
michael@0:         item.id = a.getResourceId(R.styleable.MenuItem_android_id, NO_ID);
michael@0:         item.order = a.getInt(R.styleable.MenuItem_android_orderInCategory, 0);
michael@0:         item.title = a.getText(R.styleable.MenuItem_android_title);
michael@0:         item.iconRes = a.getResourceId(R.styleable.MenuItem_android_icon, 0);
michael@0:         item.checkable = a.getBoolean(R.styleable.MenuItem_android_checkable, false);
michael@0:         item.checked = a.getBoolean(R.styleable.MenuItem_android_checked, false);
michael@0:         item.visible = a.getBoolean(R.styleable.MenuItem_android_visible, true);
michael@0:         item.enabled = a.getBoolean(R.styleable.MenuItem_android_enabled, true);
michael@0:         item.hasSubMenu = false;
michael@0: 
michael@0:         if (Build.VERSION.SDK_INT >= 11)
michael@0:             item.showAsAction = a.getInt(R.styleable.MenuItem_android_showAsAction, 0);
michael@0: 
michael@0:         a.recycle();
michael@0:     }
michael@0:         
michael@0:     public void setValues(ParsedItem item, MenuItem menuItem) {
michael@0:         menuItem.setChecked(item.checked)
michael@0:                 .setVisible(item.visible)
michael@0:                 .setEnabled(item.enabled)
michael@0:                 .setCheckable(item.checkable)
michael@0:                 .setIcon(item.iconRes);
michael@0: 
michael@0:         if (Build.VERSION.SDK_INT >= 11)
michael@0:             menuItem.setShowAsAction(item.showAsAction);
michael@0:     }
michael@0: }