1 files changed, 163 insertions, 0 deletions
diff --git a/mobile/android/base/java/org/mozilla/gecko/menu/GeckoMenuInflater.java b/mobile/android/base/java/org/mozilla/gecko/menu/GeckoMenuInflater.java
new file mode 100644
index 000000000..dfcb31c5f
--- /dev/null
+++ b/mobile/android/base/java/org/mozilla/gecko/menu/GeckoMenuInflater.java
@@ -0,0 +1,163 @@
+/* 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();
+        }
+    }
+}