(function () {
/**
* Creates a list of options or commands which are made visible in response to
* an HTML element's "contextmenu" event ("mousedown" for Opera).
*
* @param {String} p_oElement String specifying the id attribute of the
* <code><div></code> element of the context menu.
* @param {String} p_oElement String specifying the id attribute of the
* <code><select></code> element to be used as the data source for the
* context menu.
* @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-
* html.html#ID-22445964">HTMLDivElement</a>} p_oElement Object specifying the
* <code><div></code> element of the context menu.
* @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-
* html.html#ID-94282980">HTMLSelectElement</a>} p_oElement Object specifying
* the <code><select></code> element to be used as the data source for
* the context menu.
* @param {Object} p_oConfig Optional. Object literal specifying the
* configuration for the context menu. See configuration class documentation
* for more details.
* @class ContextMenu
* @constructor
* @extends YAHOO.widget.Menu
* @namespace YAHOO.widget
*/
YAHOO.widget.ContextMenu = function(p_oElement, p_oConfig) {
YAHOO.widget.ContextMenu.superclass.constructor.call(this,
p_oElement, p_oConfig);
};
var Event = YAHOO.util.Event,
ContextMenu = YAHOO.widget.ContextMenu,
/**
* Constant representing the name of the ContextMenu's events
* @property EVENT_TYPES
* @private
* @final
* @type Object
*/
EVENT_TYPES = {
"TRIGGER_CONTEXT_MENU": "triggerContextMenu",
"CONTEXT_MENU": (YAHOO.env.ua.opera ? "mousedown" : "contextmenu"),
"CLICK": "click"
},
/**
* Constant representing the ContextMenu's configuration properties
* @property DEFAULT_CONFIG
* @private
* @final
* @type Object
*/
DEFAULT_CONFIG = {
"TRIGGER": {
key: "trigger",
suppressEvent: true
}
};
/**
* @method position
* @description "beforeShow" event handler used to position the contextmenu.
* @private
* @param {String} p_sType String representing the name of the event that
* was fired.
* @param {Array} p_aArgs Array of arguments sent when the event was fired.
* @param {Array} p_aPos Array representing the xy position for the context menu.
*/
function position(p_sType, p_aArgs, p_aPos) {
this.cfg.setProperty("xy", p_aPos);
this.beforeShowEvent.unsubscribe(position, p_aPos);
}
YAHOO.lang.extend(ContextMenu, YAHOO.widget.Menu, {
// Private properties
/**
* @property _oTrigger
* @description Object reference to the current value of the "trigger"
* configuration property.
* @default null
* @private
* @type String|<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/leve
* l-one-html.html#ID-58190037">HTMLElement</a>|Array
*/
_oTrigger: null,
/**
* @property _bCancelled
* @description Boolean indicating if the display of the context menu should
* be cancelled.
* @default false
* @private
* @type Boolean
*/
_bCancelled: false,
// Public properties
/**
* @property contextEventTarget
* @description Object reference for the HTML element that was the target of the
* "contextmenu" DOM event ("mousedown" for Opera) that triggered the display of
* the context menu.
* @default null
* @type <a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-
* html.html#ID-58190037">HTMLElement</a>
*/
contextEventTarget: null,
// Events
/**
* @event triggerContextMenuEvent
* @description Custom Event wrapper for the "contextmenu" DOM event
* ("mousedown" for Opera) fired by the element(s) that trigger the display of
* the context menu.
*/
triggerContextMenuEvent: null,
/**
* @method init
* @description The ContextMenu class's initialization method. This method is
* automatically called by the constructor, and sets up all DOM references for
* pre-existing markup, and creates required markup if it is not already present.
* @param {String} p_oElement String specifying the id attribute of the
* <code><div></code> element of the context menu.
* @param {String} p_oElement String specifying the id attribute of the
* <code><select></code> element to be used as the data source for
* the context menu.
* @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-
* html.html#ID-22445964">HTMLDivElement</a>} p_oElement Object specifying the
* <code><div></code> element of the context menu.
* @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-
* html.html#ID-94282980">HTMLSelectElement</a>} p_oElement Object specifying
* the <code><select></code> element to be used as the data source for
* the context menu.
* @param {Object} p_oConfig Optional. Object literal specifying the
* configuration for the context menu. See configuration class documentation
* for more details.
*/
init: function(p_oElement, p_oConfig) {
// Call the init of the superclass (YAHOO.widget.Menu)
ContextMenu.superclass.init.call(this, p_oElement);
this.beforeInitEvent.fire(ContextMenu);
if(p_oConfig) {
this.cfg.applyConfig(p_oConfig, true);
}
this.initEvent.fire(ContextMenu);
},
/**
* @method initEvents
* @description Initializes the custom events for the context menu.
*/
initEvents: function() {
ContextMenu.superclass.initEvents.call(this);
// Create custom events
this.triggerContextMenuEvent =
this.createEvent(EVENT_TYPES.TRIGGER_CONTEXT_MENU);
this.triggerContextMenuEvent.signature = YAHOO.util.CustomEvent.LIST;
},
/**
* @method cancel
* @description Cancels the display of the context menu.
*/
cancel: function() {
this._bCancelled = true;
},
// Private methods
/**
* @method _removeEventHandlers
* @description Removes all of the DOM event handlers from the HTML element(s)
* whose "context menu" event ("click" for Opera) trigger the display of
* the context menu.
* @private
*/
_removeEventHandlers: function() {
var oTrigger = this._oTrigger;
// Remove the event handlers from the trigger(s)
if (oTrigger) {
Event.removeListener(oTrigger, EVENT_TYPES.CONTEXT_MENU,
this._onTriggerContextMenu);
if(YAHOO.env.ua.opera) {
Event.removeListener(oTrigger, EVENT_TYPES.CLICK,
this._onTriggerClick);
}
}
},
// Private event handlers
/**
* @method _onTriggerClick
* @description "click" event handler for the HTML element(s) identified as the
* "trigger" for the context menu. Used to cancel default behaviors in Opera.
* @private
* @param {Event} p_oEvent Object representing the DOM event object passed back
* by the event utility (YAHOO.util.Event).
* @param {YAHOO.widget.ContextMenu} p_oMenu Object representing the context
* menu that is handling the event.
*/
_onTriggerClick: function(p_oEvent, p_oMenu) {
if(p_oEvent.ctrlKey) {
Event.stopEvent(p_oEvent);
}
},
/**
* @method _onTriggerContextMenu
* @description "contextmenu" event handler ("mousedown" for Opera) for the HTML
* element(s) that trigger the display of the context menu.
* @private
* @param {Event} p_oEvent Object representing the DOM event object passed back
* by the event utility (YAHOO.util.Event).
* @param {YAHOO.widget.ContextMenu} p_oMenu Object representing the context
* menu that is handling the event.
*/
_onTriggerContextMenu: function(p_oEvent, p_oMenu) {
if (p_oEvent.type == "mousedown" && !p_oEvent.ctrlKey) {
return;
}
var aXY;
/*
Prevent the browser's default context menu from appearing and
stop the propagation of the "contextmenu" event so that
other ContextMenu instances are not displayed.
*/
Event.stopEvent(p_oEvent);
this.contextEventTarget = Event.getTarget(p_oEvent);
this.triggerContextMenuEvent.fire(p_oEvent);
// Hide any other Menu instances that might be visible
YAHOO.widget.MenuManager.hideVisible();
if(!this._bCancelled) {
// Position and display the context menu
aXY = Event.getXY(p_oEvent);
if (!YAHOO.util.Dom.inDocument(this.element)) {
this.beforeShowEvent.subscribe(position, aXY);
}
else {
this.cfg.setProperty("xy", aXY);
}
this.show();
}
this._bCancelled = false;
},
// Public methods
/**
* @method toString
* @description Returns a string representing the context menu.
* @return {String}
*/
toString: function() {
var sReturnVal = "ContextMenu",
sId = this.id;
if(sId) {
sReturnVal += (" " + sId);
}
return sReturnVal;
},
/**
* @method initDefaultConfig
* @description Initializes the class's configurable properties which can be
* changed using the context menu's Config object ("cfg").
*/
initDefaultConfig: function() {
ContextMenu.superclass.initDefaultConfig.call(this);
/**
* @config trigger
* @description The HTML element(s) whose "contextmenu" event ("mousedown"
* for Opera) trigger the display of the context menu. Can be a string
* representing the id attribute of the HTML element, an object reference
* for the HTML element, or an array of strings or HTML element references.
* @default null
* @type String|<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
* level-one-html.html#ID-58190037">HTMLElement</a>|Array
*/
this.cfg.addProperty(DEFAULT_CONFIG.TRIGGER.key,
{
handler: this.configTrigger,
suppressEvent: DEFAULT_CONFIG.TRIGGER.suppressEvent
}
);
},
/**
* @method destroy
* @description Removes the context menu's <code><div></code> element
* (and accompanying child nodes) from the document.
*/
destroy: function() {
// Remove the DOM event handlers from the current trigger(s)
this._removeEventHandlers();
// Continue with the superclass implementation of this method
ContextMenu.superclass.destroy.call(this);
},
// Public event handlers for configuration properties
/**
* @method configTrigger
* @description Event handler for when the value of the "trigger" configuration
* property changes.
* @param {String} p_sType String representing the name of the event that
* was fired.
* @param {Array} p_aArgs Array of arguments sent when the event was fired.
* @param {YAHOO.widget.ContextMenu} p_oMenu Object representing the context
* menu that fired the event.
*/
configTrigger: function(p_sType, p_aArgs, p_oMenu) {
var oTrigger = p_aArgs[0];
if(oTrigger) {
/*
If there is a current "trigger" - remove the event handlers
from that element(s) before assigning new ones
*/
if(this._oTrigger) {
this._removeEventHandlers();
}
this._oTrigger = oTrigger;
/*
Listen for the "mousedown" event in Opera b/c it does not
support the "contextmenu" event
*/
Event.on(oTrigger, EVENT_TYPES.CONTEXT_MENU,
this._onTriggerContextMenu, this, true);
/*
Assign a "click" event handler to the trigger element(s) for
Opera to prevent default browser behaviors.
*/
if(YAHOO.env.ua.opera) {
Event.on(oTrigger, EVENT_TYPES.CLICK, this._onTriggerClick,
this, true);
}
}
else {
this._removeEventHandlers();
}
}
}); // END YAHOO.lang.extend
}());