pjs/toolkit/content/widgets/menu.xml

<?xml version="1.0"?>

<!DOCTYPE bindings [
  <!ENTITY % globalRegionDTD SYSTEM "chrome://global-region/locale/region.dtd">
  %globalRegionDTD;
]>

<bindings id="menuitemBindings"
   xmlns="http://www.mozilla.org/xbl"
   xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
   xmlns:xbl="http://www.mozilla.org/xbl">

  <binding id="menuitem-base">
    <resources>
      <stylesheet src="chrome://global/skin/menu.css"/>
    </resources>
    <implementation implements="nsIDOMXULSelectControlItemElement, nsIAccessibleProvider">
      <property name="accessible">
        <getter>
          <![CDATA[
            var accService = Components.classes["@mozilla.org/accessibilityService;1"].getService(Components.interfaces.nsIAccessibilityService);
            if (this.localName == "menuseparator")
              return accService.createXULMenuSeparatorAccessible(this);
            if (this.parentNode && this.parentNode.parentNode &&
                this.parentNode.localName == "menupopup" && this.parentNode.parentNode.localName == "menulist")
              return accService.createXULSelectOptionAccessible(this);
            return accService.createXULMenuitemAccessible(this);
          ]]>
        </getter>
      </property>
    </implementation>
  </binding>

  <binding id="menu" extends="chrome://global/content/bindings/menu.xml#menuitem-base">
    <content>
      <xul:label class="menu-text" flex="1" xbl:inherits="value=label,accesskey,crop" crop="right"/>
      <xul:hbox anonid="accel">
        <xul:label class="menu-accel" xbl:inherits="value=acceltext"/>
      </xul:hbox>
      <xul:hbox align="center" class="menu-right" chromedir="&locale.dir;"
                xbl:inherits="_moz-menuactive,disabled">
        <xul:image/>
      </xul:hbox>
      <children includes="menupopup"/>
    </content>
    
    <implementation>
      <property name="value" onset="this.setAttribute('value',val); return val;"
                            onget="return this.getAttribute('value');"/>
    </implementation>  
  </binding>

  <binding id="menuitem" extends="chrome://global/content/bindings/menu.xml#menuitem-base">
    <content>
      <xul:label class="menu-text" flex="1" xbl:inherits="value=label,accesskey,crop" crop="right"/>
      <xul:hbox anonid="accel">
        <xul:label class="menu-accel" xbl:inherits="value=acceltext"/>
      </xul:hbox>
    </content>
    
    <implementation>
      <property name="value" onset="this.setAttribute('value',val); return val;"
                            onget="return this.getAttribute('value');"/>
      <property name="label" onget="return this.getAttribute('label');"
                             onset="this.setAttribute('label', val); return val;"/>
    </implementation>  
  </binding>

  <binding id="menu-menubar" extends="chrome://global/content/bindings/menu.xml#menuitem-base">
    <content>
      <xul:label class="menubar-text" xbl:inherits="value=label,accesskey,crop" crop="right"/>
      <children includes="menupopup"/>
    </content>
  </binding>

  <binding id="menu-menubar-iconic" extends="chrome://global/content/bindings/menu.xml#menuitem-base">
    <content>
      <xul:image class="menubar-left" xbl:inherits="image=src"/>
      <xul:label class="menubar-text" xbl:inherits="value=label,accesskey,crop" crop="right"/>
      <children includes="menupopup"/>
    </content>
  </binding>

  <binding id="menuitem-iconic" extends="chrome://global/content/bindings/menu.xml#menuitem">
    <content>
      <xul:hbox class="menu-iconic-left" align="center" pack="center"
                xbl:inherits="selected,_moz-menuactive,disabled,checked">
        <xul:image class="menu-iconic-icon" xbl:inherits="src=image,validate,src"/>
      </xul:hbox>
      <xul:label class="menu-iconic-text" flex="1" xbl:inherits="value=label,accesskey,crop" crop="right"/>
      <xul:hbox anonid="accel">
        <xul:label class="menu-iconic-accel" xbl:inherits="value=acceltext"/>
      </xul:hbox>
    </content>
  </binding>

  <binding id="menuitem-iconic-noaccel" extends="chrome://global/content/bindings/menu.xml#menuitem">
    <content>
      <xul:hbox class="menu-iconic-left" align="center" pack="center"
                xbl:inherits="selected,disabled,checked">
        <xul:image class="menu-iconic-icon" xbl:inherits="src=image,validate,src"/>
      </xul:hbox>
      <xul:label class="menu-iconic-text" flex="1" xbl:inherits="value=label,accesskey,crop" crop="right"/>
    </content>
  </binding>

  <binding id="menuitem-iconic-desc-noaccel" extends="chrome://global/content/bindings/menu.xml#menuitem">
    <content>
      <xul:hbox class="menu-iconic-left" align="center" pack="center"
                xbl:inherits="selected,disabled,checked">
        <xul:image class="menu-iconic-icon" xbl:inherits="src=image,validate,src"/>
      </xul:hbox>
      <xul:label class="menu-iconic-text" xbl:inherits="value=label,accesskey,crop" crop="right" flex="1"/>
      <xul:label class="menu-iconic-text menu-description" xbl:inherits="value=description" crop="right" flex="10000"/>
    </content>
  </binding>

  <binding id="menu-iconic" extends="chrome://global/content/bindings/menu.xml#menuitem-base">
    <content>
      <xul:hbox class="menu-iconic-left" align="center" pack="center">
        <xul:image xbl:inherits="src=image"/>
      </xul:hbox>
      <xul:label class="menu-iconic-text" flex="1" xbl:inherits="value=label,accesskey,crop" crop="right"/>
      <xul:hbox anonid="accel">
        <xul:label class="menu-iconic-accel" xbl:inherits="value=acceltext"/>
      </xul:hbox>
      <xul:hbox class="menu-right" xbl:inherits="_moz-menuactive,disabled" align="center" pack="center">
        <xul:image/>
      </xul:hbox>
      <children includes="menupopup|template"/>
    </content>
    
    <implementation>
      <property name="value" onset="this.setAttribute('value',val); return val;"
                            onget="return this.getAttribute('value');"/>
    </implementation>  
  </binding>
  
  <binding id="menubutton-item" extends="chrome://global/content/bindings/menu.xml#menuitem-base">
    <content>
      <xul:label class="menubutton-text" flex="1" xbl:inherits="value=label,accesskey,crop" crop="right"/>
      <children includes="menupopup"/>
    </content>
  </binding>  
  
  <binding id="menuseparator" extends="chrome://global/content/bindings/menu.xml#menuitem-base"/>

</bindings>