container-debug.js

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* @property YAHOO.widget.Overlay.TOP_LEFT
* @static
* @final
* @type String
*/
YAHOO.widget.Overlay.TOP_LEFT = "tl";

/**
* Constant representing the top right corner of an element, used for configuring the context element alignment
* @property YAHOO.widget.Overlay.TOP_RIGHT
* @static
* @final
* @type String
*/
YAHOO.widget.Overlay.TOP_RIGHT = "tr";

/**
* Constant representing the top bottom left corner of an element, used for configuring the context element alignment
* @property YAHOO.widget.Overlay.BOTTOM_LEFT
* @static
* @final
* @type String
*/
YAHOO.widget.Overlay.BOTTOM_LEFT = "bl";

/**
* Constant representing the bottom right corner of an element, used for configuring the context element alignment
* @property YAHOO.widget.Overlay.BOTTOM_RIGHT
* @static
* @final
* @type String
*/
YAHOO.widget.Overlay.BOTTOM_RIGHT = "br";

/**
* Constant representing the default CSS class used for an Overlay
* @property YAHOO.widget.Overlay.CSS_OVERLAY
* @static
* @final
* @type String
*/
YAHOO.widget.Overlay.CSS_OVERLAY = "overlay";

/**
* The Overlay initialization method, which is executed for Overlay and all of its subclasses. 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.
* @method init
* @param {String}	el	The element ID representing the Overlay <em>OR</em>
* @param {HTMLElement}	el	The element representing the Overlay
* @param {Object}	userConfig	The configuration object literal containing the configuration that should be set for this Overlay. See configuration documentation for more details.
*/
YAHOO.widget.Overlay.prototype.init = function(el, userConfig) {
	YAHOO.widget.Overlay.superclass.init.call(this, el/*, userConfig*/);  // Note that we don't pass the user config in here yet because we only want it executed once, at the lowest subclass level

	this.beforeInitEvent.fire(YAHOO.widget.Overlay);

	YAHOO.util.Dom.addClass(this.element, YAHOO.widget.Overlay.CSS_OVERLAY);

	if (userConfig) {
		this.cfg.applyConfig(userConfig, true);
	}

	if (this.platform == "mac" && this.browser == "gecko") {
		if (! YAHOO.util.Config.alreadySubscribed(this.showEvent,this.showMacGeckoScrollbars,this)) {
			this.showEvent.subscribe(this.showMacGeckoScrollbars,this,true);
		}
		if (! YAHOO.util.Config.alreadySubscribed(this.hideEvent,this.hideMacGeckoScrollbars,this)) {
			this.hideEvent.subscribe(this.hideMacGeckoScrollbars,this,true);
		}
	}

	this.initEvent.fire(YAHOO.widget.Overlay);

};

/**
* Initializes the custom events for Overlay which are fired automatically at appropriate times by the Overlay class.
* @method initEvents
*/
YAHOO.widget.Overlay.prototype.initEvents = function() {
	YAHOO.widget.Overlay.superclass.initEvents.call(this);

	/**
	* CustomEvent fired before the Overlay is moved.
	* @event beforeMoveEvent
	* @param {Number} x	x coordinate
	* @param {Number} y	y coordinate
	*/
	this.beforeMoveEvent = new YAHOO.util.CustomEvent("beforeMove", this);

	/**
	* CustomEvent fired after the Overlay is moved.
	* @event moveEvent
	* @param {Number} x	x coordinate
	* @param {Number} y	y coordinate
	*/
	this.moveEvent = new YAHOO.util.CustomEvent("move", this);
};

/**
* Initializes the class's configurable properties which can be changed using the Overlay's Config object (cfg).
* @method initDefaultConfig
*/
YAHOO.widget.Overlay.prototype.initDefaultConfig = function() {
	YAHOO.widget.Overlay.superclass.initDefaultConfig.call(this);

	// Add overlay config properties //

	/**
	* The absolute x-coordinate position of the Overlay
	* @config x
	* @type Number
	* @default null
	*/
	this.cfg.addProperty("x", { handler:this.configX, validator:this.cfg.checkNumber, suppressEvent:true, supercedes:["iframe"] } );

	/**
	* The absolute y-coordinate position of the Overlay
	* @config y
	* @type Number
	* @default null
	*/
	this.cfg.addProperty("y", { handler:this.configY, validator:this.cfg.checkNumber, suppressEvent:true, supercedes:["iframe"] } );

	/**
	* An array with the absolute x and y positions of the Overlay
	* @config xy
	* @type Number[]
	* @default null
	*/
	this.cfg.addProperty("xy",{ handler:this.configXY, suppressEvent:true, supercedes:["iframe"] } );

	/**
	* The array of context arguments for context-sensitive positioning. The format is: [id or element, element corner, context corner]. For example, setting this property to ["img1", "tl", "bl"] would align the Overlay's top left corner to the context element's bottom left corner.
	* @config context
	* @type Array
	* @default null
	*/
	this.cfg.addProperty("context",	{ handler:this.configContext, suppressEvent:true, supercedes:["iframe"] } );

	/**
	* True if the Overlay should be anchored to the center of the viewport.
	* @config fixedcenter
	* @type Boolean
	* @default false
	*/
	this.cfg.addProperty("fixedcenter", { value:false, handler:this.configFixedCenter, validator:this.cfg.checkBoolean, supercedes:["iframe","visible"] } );

	/**
	* CSS width of the Overlay.
	* @config width
	* @type String
	* @default null
	*/
	this.cfg.addProperty("width", { handler:this.configWidth, suppressEvent:true, supercedes:["iframe"] } );

	/**
	* CSS height of the Overlay.
	* @config height
	* @type String
	* @default null
	*/
	this.cfg.addProperty("height", { handler:this.configHeight, suppressEvent:true, supercedes:["iframe"] } );

	/**
	* CSS z-index of the Overlay.
	* @config zIndex
	* @type Number
	* @default null
	*/
	this.cfg.addProperty("zIndex", { value:null, handler:this.configzIndex } );

	/**
	* True if the Overlay should be prevented from being positioned out of the viewport.
	* @config constraintoviewport
	* @type Boolean
	* @default false
	*/
	this.cfg.addProperty("constraintoviewport", { value:false, handler:this.configConstrainToViewport, validator:this.cfg.checkBoolean, supercedes:["iframe","x","y","xy"] } );

	/**
	* True if the Overlay should have an IFRAME shim (for correcting the select z-index bug in IE6 and below).
	* @config iframe
	* @type Boolean
	* @default true for IE6 and below, false for all others
	*/
	this.cfg.addProperty("iframe", { value:(this.browser == "ie" ? true : false), handler:this.configIframe, validator:this.cfg.checkBoolean, supercedes:["zIndex"] } );
};

/**
* Moves the Overlay to the specified position. This function is identical to calling this.cfg.setProperty("xy", [x,y]);
* @method moveTo
* @param {Number}	x	The Overlay's new x position
* @param {Number}	y	The Overlay's new y position
*/
YAHOO.widget.Overlay.prototype.moveTo = function(x, y) {
	this.cfg.setProperty("xy",[x,y]);
};

/**
* Adds a special CSS class to the Overlay when Mac/Gecko is in use, to work around a Gecko bug where
* scrollbars cannot be hidden. See https://bugzilla.mozilla.org/show_bug.cgi?id=187435
* @method hideMacGeckoScrollbars
*/
YAHOO.widget.Overlay.prototype.hideMacGeckoScrollbars = function() {
	YAHOO.util.Dom.removeClass(this.element, "show-scrollbars");
	YAHOO.util.Dom.addClass(this.element, "hide-scrollbars");
};

/**
* Removes a special CSS class from the Overlay when Mac/Gecko is in use, to work around a Gecko bug where
* scrollbars cannot be hidden. See https://bugzilla.mozilla.org/show_bug.cgi?id=187435
* @method showMacGeckoScrollbars
*/
YAHOO.widget.Overlay.prototype.showMacGeckoScrollbars = function() {
	YAHOO.util.Dom.removeClass(this.element, "hide-scrollbars");
	YAHOO.util.Dom.addClass(this.element, "show-scrollbars");
};

// BEGIN BUILT-IN PROPERTY EVENT HANDLERS //

/**
* The default event handler fired when the "visible" property is changed. This method is responsible for firing showEvent and hideEvent.
* @method configVisible
* @param {String} type	The CustomEvent type (usually the property name)
* @param {Object[]}	args	The CustomEvent arguments. For configuration handlers, args[0] will equal the newly applied value for the property.
* @param {Object} obj	The scope object. For configuration handlers, this will usually equal the owner.
*/
YAHOO.widget.Overlay.prototype.configVisible = function(type, args, obj) {
	var visible = args[0];
	var currentVis = YAHOO.util.Dom.getStyle(this.element, "visibility");

	if (currentVis == "inherit") {
		var e = this.element.parentNode;
		while (e.nodeType != 9 && e.nodeType != 11) {
			currentVis = YAHOO.util.Dom.getStyle(e, "visibility");
			if (currentVis != "inherit") { break; }
			e = e.parentNode;
		}
		if (currentVis == "inherit") {
			currentVis = "visible";
		}
	}

	var effect = this.cfg.getProperty("effect");

	var effectInstances = [];
	if (effect) {
		if (effect instanceof Array) {
			for (var i=0;i<effect.length;i++) {
				var eff = effect[i];
				effectInstances[effectInstances.length] = eff.effect(this, eff.duration);
			}
		} else {
			effectInstances[effectInstances.length] = effect.effect(this, effect.duration);
		}
	}

	var isMacGecko = (this.platform == "mac" && this.browser == "gecko");

	if (visible) { // Show
		if (isMacGecko) {
			this.showMacGeckoScrollbars();
		}

		if (effect) { // Animate in
			if (visible) { // Animate in if not showing
				if (currentVis != "visible" || currentVis === "") {
					this.beforeShowEvent.fire();
					for (var j=0;j<effectInstances.length;j++) {
						var ei = effectInstances[j];
						if (j === 0 && ! YAHOO.util.Config.alreadySubscribed(ei.animateInCompleteEvent,this.showEvent.fire,this.showEvent)) {
							ei.animateInCompleteEvent.subscribe(this.showEvent.fire,this.showEvent,true); // Delegate showEvent until end of animateInComplete
						}
						ei.animateIn();
					}
				}
			}
		} else { // Show
			if (currentVis != "visible" || currentVis === "") {
				this.beforeShowEvent.fire();
				YAHOO.util.Dom.setStyle(this.element, "visibility", "visible");
				this.cfg.refireEvent("iframe");
				this.showEvent.fire();
			}
		}

	} else { // Hide
		if (isMacGecko) {
			this.hideMacGeckoScrollbars();
		}

		if (effect) { // Animate out if showing
			if (currentVis == "visible") {
				this.beforeHideEvent.fire();
				for (var k=0;k<effectInstances.length;k++) {
					var h = effectInstances[k];
					if (k === 0 && ! YAHOO.util.Config.alreadySubscribed(h.animateOutCompleteEvent,this.hideEvent.fire,this.hideEvent)) {
						h.animateOutCompleteEvent.subscribe(this.hideEvent.fire,this.hideEvent,true); // Delegate hideEvent until end of animateOutComplete
					}
					h.animateOut();
				}
			} else if (currentVis === "") {
				YAHOO.util.Dom.setStyle(this.element, "visibility", "hidden");
			}
		} else { // Simple hide
			if (currentVis == "visible" || currentVis === "") {
				this.beforeHideEvent.fire();
				YAHOO.util.Dom.setStyle(this.element, "visibility", "hidden");
				this.cfg.refireEvent("iframe");
				this.hideEvent.fire();
			}
		}
	}
};

/**
* Center event handler used for centering on scroll/resize, but only if the Overlay is visible
* @method doCenterOnDOMEvent
*/
YAHOO.widget.Overlay.prototype.doCenterOnDOMEvent = function() {
	if (this.cfg.getProperty("visible")) {
		this.center();
	}
};

/**
* The default event handler fired when the "fixedcenter" property is changed.
* @method configFixedCenter
* @param {String} type	The CustomEvent type (usually the property name)
* @param {Object[]}	args	The CustomEvent arguments. For configuration handlers, args[0] will equal the newly applied value for the property.
* @param {Object} obj	The scope object. For configuration handlers, this will usually equal the owner.
*/
YAHOO.widget.Overlay.prototype.configFixedCenter = function(type, args, obj) {
	var val = args[0];

	if (val) {
		this.center();

		if (! YAHOO.util.Config.alreadySubscribed(this.beforeShowEvent, this.center, this)) {
			this.beforeShowEvent.subscribe(this.center, this, true);
		}

		if (! YAHOO.util.Config.alreadySubscribed(YAHOO.widget.Overlay.windowResizeEvent, this.doCenterOnDOMEvent, this)) {
			YAHOO.widget.Overlay.windowResizeEvent.subscribe(this.doCenterOnDOMEvent, this, true);
		}

		if (! YAHOO.util.Config.alreadySubscribed(YAHOO.widget.Overlay.windowScrollEvent, this.doCenterOnDOMEvent, this)) {
			YAHOO.widget.Overlay.windowScrollEvent.subscribe( this.doCenterOnDOMEvent, this, true);
		}
	} else {
		YAHOO.widget.Overlay.windowResizeEvent.unsubscribe(this.doCenterOnDOMEvent, this);
		YAHOO.widget.Overlay.windowScrollEvent.unsubscribe(this.doCenterOnDOMEvent, this);
	}
};

/**
* The default event handler fired when the "height" property is changed.
* @method configHeight
* @param {String} type	The CustomEvent type (usually the property name)
* @param {Object[]}	args	The CustomEvent arguments. For configuration handlers, args[0] will equal the newly applied value for the property.
* @param {Object} obj	The scope object. For configuration handlers, this will usually equal the owner.
*/
YAHOO.widget.Overlay.prototype.configHeight = function(type, args, obj) {
	var height = args[0];
	var el = this.element;
	YAHOO.util.Dom.setStyle(el, "height", height);
	this.cfg.refireEvent("iframe");
};

/**
* The default event handler fired when the "width" property is changed.
* @method configWidth
* @param {String} type	The CustomEvent type (usually the property name)
* @param {Object[]}	args	The CustomEvent arguments. For configuration handlers, args[0] will equal the newly applied value for the property.
* @param {Object} obj	The scope object. For configuration handlers, this will usually equal the owner.
*/
YAHOO.widget.Overlay.prototype.configWidth = function(type, args, obj) {
	var width = args[0];
	var el = this.element;
	YAHOO.util.Dom.setStyle(el, "width", width);
	this.cfg.refireEvent("iframe");
};

/**
* The default event handler fired when the "zIndex" property is changed.
* @method configzIndex
* @param {String} type	The CustomEvent type (usually the property name)
* @param {Object[]}	args	The CustomEvent arguments. For configuration handlers, args[0] will equal the newly applied value for the property.
* @param {Object} obj	The scope object. For configuration handlers, this will usually equal the owner.
*/
YAHOO.widget.Overlay.prototype.configzIndex = function(type, args, obj) {
	var zIndex = args[0];

	var el = this.element;

	if (! zIndex) {
		zIndex = YAHOO.util.Dom.getStyle(el, "zIndex");
		if (! zIndex || isNaN(zIndex)) {
			zIndex = 0;
		}
	}

	if (this.iframe) {
		if (zIndex <= 0) {
			zIndex = 1;
		}
		YAHOO.util.Dom.setStyle(this.iframe, "zIndex", (zIndex-1));
	}

	YAHOO.util.Dom.setStyle(el, "zIndex", zIndex);
	this.cfg.setProperty("zIndex", zIndex, true);
};

/**
* The default event handler fired when the "xy" property is changed.
* @method configXY
* @param {String} type	The CustomEvent type (usually the property name)
* @param {Object[]}	args	The CustomEvent arguments. For configuration handlers, args[0] will equal the newly applied value for the property.
* @param {Object} obj	The scope object. For configuration handlers, this will usually equal the owner.