(function () {
/**
* Overlay is a Module that is absolutely positioned above the page flow. It
* has convenience methods for positioning and sizing, as well as options for
* controlling zIndex and constraining the Overlay's position to the current
* visible viewport. Overlay also contains a dynamicly generated IFRAME which
* is placed beneath it for Internet Explorer 6 and 5.x so that it will be
* properly rendered above SELECT elements.
* @namespace YAHOO.widget
* @class Overlay
* @extends YAHOO.widget.Module
* @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.
* @constructor
*/
YAHOO.widget.Overlay = function (el, userConfig) {
YAHOO.widget.Overlay.superclass.constructor.call(this, el, userConfig);
};
var Lang = YAHOO.lang,
CustomEvent = YAHOO.util.CustomEvent,
Module = YAHOO.widget.Module,
Event = YAHOO.util.Event,
Dom = YAHOO.util.Dom,
Config = YAHOO.util.Config,
Overlay = YAHOO.widget.Overlay,
m_oIFrameTemplate,
/**
* Constant representing the name of the Overlay's events
* @property EVENT_TYPES
* @private
* @final
* @type Object
*/
EVENT_TYPES = {
"BEFORE_MOVE": "beforeMove",
"MOVE": "move"
},
/**
* Constant representing the Overlay's configuration properties
* @property DEFAULT_CONFIG
* @private
* @final
* @type Object
*/
DEFAULT_CONFIG = {
"X": {
key: "x",
validator: Lang.isNumber,
suppressEvent: true,
supercedes: ["iframe"]
},
"Y": {
key: "y",
validator: Lang.isNumber,
suppressEvent: true,
supercedes: ["iframe"]
},
"XY": {
key: "xy",
suppressEvent: true,
supercedes: ["iframe"]
},
"CONTEXT": {
key: "context",
suppressEvent: true,
supercedes: ["iframe"]
},
"FIXED_CENTER": {
key: "fixedcenter",
value: false,
validator: Lang.isBoolean,
supercedes: ["iframe", "visible"]
},
"WIDTH": {
key: "width",
suppressEvent: true,
supercedes: ["context", "fixedcenter", "iframe"]
},
"HEIGHT": {
key: "height",
suppressEvent: true,
supercedes: ["context", "fixedcenter", "iframe"]
},
"ZINDEX": {
key: "zindex",
value: null
},
"CONSTRAIN_TO_VIEWPORT": {
key: "constraintoviewport",
value: false,
validator: Lang.isBoolean,
supercedes: ["iframe", "x", "y", "xy"]
},
"IFRAME": {
key: "iframe",
value: (YAHOO.env.ua.ie == 6 ? true : false),
validator: Lang.isBoolean,
supercedes: ["zindex"]
}
};
/**
* The URL that will be placed in the iframe
* @property YAHOO.widget.Overlay.IFRAME_SRC
* @static
* @final
* @type String
*/
Overlay.IFRAME_SRC = "javascript:false;";
/**
* Number representing how much the iframe shim should be offset from each
* side of an Overlay instance, in pixels.
* @property YAHOO.widget.Overlay.IFRAME_SRC
* @default 3
* @static
* @final
* @type Number
*/
Overlay.IFRAME_OFFSET = 3;
/**
* Number representing the minimum distance an Overlay instance should be
* positioned relative to the boundaries of the browser's viewport, in pixels.
* @property YAHOO.widget.Overlay.VIEWPORT_OFFSET
* @default 10
* @static
* @final
* @type Number
*/
Overlay.VIEWPORT_OFFSET = 10;
/**
* Constant representing the top left corner of an element, used for
* configuring the context element alignment
* @property YAHOO.widget.Overlay.TOP_LEFT
* @static
* @final
* @type String
*/
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
*/
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
*/
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
*/
Overlay.BOTTOM_RIGHT = "br";
/**
* Constant representing the default CSS class used for an Overlay
* @property YAHOO.widget.Overlay.CSS_OVERLAY
* @static
* @final
* @type String
*/
Overlay.CSS_OVERLAY = "yui-overlay";
/**
* A singleton CustomEvent used for reacting to the DOM event for
* window scroll
* @event YAHOO.widget.Overlay.windowScrollEvent
*/
Overlay.windowScrollEvent = new CustomEvent("windowScroll");
/**
* A singleton CustomEvent used for reacting to the DOM event for
* window resize
* @event YAHOO.widget.Overlay.windowResizeEvent
*/
Overlay.windowResizeEvent = new CustomEvent("windowResize");
/**
* The DOM event handler used to fire the CustomEvent for window scroll
* @method YAHOO.widget.Overlay.windowScrollHandler
* @static
* @param {DOMEvent} e The DOM scroll event
*/
Overlay.windowScrollHandler = function (e) {
if (YAHOO.env.ua.ie) {
if (! window.scrollEnd) {
window.scrollEnd = -1;
}
clearTimeout(window.scrollEnd);
window.scrollEnd = setTimeout(function () {
Overlay.windowScrollEvent.fire();
}, 1);
} else {
Overlay.windowScrollEvent.fire();
}
};
/**
* The DOM event handler used to fire the CustomEvent for window resize
* @method YAHOO.widget.Overlay.windowResizeHandler
* @static
* @param {DOMEvent} e The DOM resize event
*/
Overlay.windowResizeHandler = function (e) {
if (YAHOO.env.ua.ie) {
if (! window.resizeEnd) {
window.resizeEnd = -1;
}
clearTimeout(window.resizeEnd);
window.resizeEnd = setTimeout(function () {
Overlay.windowResizeEvent.fire();
}, 100);
} else {
Overlay.windowResizeEvent.fire();
}
};
/**
* A boolean that indicated whether the window resize and scroll events have
* already been subscribed to.
* @property YAHOO.widget.Overlay._initialized
* @private
* @type Boolean
*/
Overlay._initialized = null;
if (Overlay._initialized === null) {
Event.on(window, "scroll", Overlay.windowScrollHandler);
Event.on(window, "resize", Overlay.windowResizeHandler);
Overlay._initialized = true;
}
YAHOO.extend(Overlay, Module, {
/**
* 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.
*/
init: function (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
*/
Overlay.superclass.init.call(this, el/*, userConfig*/);
this.beforeInitEvent.fire(Overlay);
Dom.addClass(this.element, Overlay.CSS_OVERLAY);
if (userConfig) {
this.cfg.applyConfig(userConfig, true);
}
if (this.platform == "mac" && YAHOO.env.ua.gecko) {
if (! Config.alreadySubscribed(this.showEvent,
this.showMacGeckoScrollbars, this)) {
this.showEvent.subscribe(this.showMacGeckoScrollbars,
this, true);
}
if (! Config.alreadySubscribed(this.hideEvent,
this.hideMacGeckoScrollbars, this)) {
this.hideEvent.subscribe(this.hideMacGeckoScrollbars,
this, true);
}
}
this.initEvent.fire(Overlay);
},
/**
* Initializes the custom events for Overlay which are fired
* automatically at appropriate times by the Overlay class.
* @method initEvents
*/
initEvents: function () {
Overlay.superclass.initEvents.call(this);
var SIGNATURE = CustomEvent.LIST;
/**
* CustomEvent fired before the Overlay is moved.
* @event beforeMoveEvent
* @param {Number} x x coordinate
* @param {Number} y y coordinate
*/
this.beforeMoveEvent = this.createEvent(EVENT_TYPES.BEFORE_MOVE);
this.beforeMoveEvent.signature = SIGNATURE;
/**
* CustomEvent fired after the Overlay is moved.
* @event moveEvent
* @param {Number} x x coordinate
* @param {Number} y y coordinate
*/
this.moveEvent = this.createEvent(EVENT_TYPES.MOVE);
this.moveEvent.signature = SIGNATURE;
},
/**
* Initializes the class's configurable properties which can be changed
* using the Overlay's Config object (cfg).
* @method initDefaultConfig
*/
initDefaultConfig: function () {
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(DEFAULT_CONFIG.X.key, {
handler: this.configX,
validator: DEFAULT_CONFIG.X.validator,
suppressEvent: DEFAULT_CONFIG.X.suppressEvent,
supercedes: DEFAULT_CONFIG.X.supercedes
});
/**
* The absolute y-coordinate position of the Overlay
* @config y
* @type Number
* @default null
*/
this.cfg.addProperty(DEFAULT_CONFIG.Y.key, {
handler: this.configY,
validator: DEFAULT_CONFIG.Y.validator,
suppressEvent: DEFAULT_CONFIG.Y.suppressEvent,
supercedes: DEFAULT_CONFIG.Y.supercedes
});
/**
* An array with the absolute x and y positions of the Overlay
* @config xy
* @type Number[]
* @default null
*/
this.cfg.addProperty(DEFAULT_CONFIG.XY.key, {
handler: this.configXY,
suppressEvent: DEFAULT_CONFIG.XY.suppressEvent,
supercedes: DEFAULT_CONFIG.XY.supercedes
});
/**
* 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(DEFAULT_CONFIG.CONTEXT.key, {
handler: this.configContext,
suppressEvent: DEFAULT_CONFIG.CONTEXT.suppressEvent,
supercedes: DEFAULT_CONFIG.CONTEXT.supercedes
});
/**
* True if the Overlay should be anchored to the center of
* the viewport.
* @config fixedcenter
* @type Boolean
* @default false
*/
this.cfg.addProperty(DEFAULT_CONFIG.FIXED_CENTER.key, {
handler: this.configFixedCenter,
value: DEFAULT_CONFIG.FIXED_CENTER.value,
validator: DEFAULT_CONFIG.FIXED_CENTER.validator,
supercedes: DEFAULT_CONFIG.FIXED_CENTER.supercedes
});
/**
* CSS width of the Overlay.
* @config width
* @type String
* @default null
*/
this.cfg.addProperty(DEFAULT_CONFIG.WIDTH.key, {
handler: this.configWidth,
suppressEvent: DEFAULT_CONFIG.WIDTH.suppressEvent,
supercedes: DEFAULT_CONFIG.WIDTH.supercedes
});
/**
* CSS height of the Overlay.
* @config height
* @type String
* @default null
*/
this.cfg.addProperty(DEFAULT_CONFIG.HEIGHT.key, {
handler: this.configHeight,
suppressEvent: DEFAULT_CONFIG.HEIGHT.suppressEvent,
supercedes: DEFAULT_CONFIG.HEIGHT.supercedes
});
/**
* CSS z-index of the Overlay.
* @config zIndex
* @type Number
* @default null
*/
this.cfg.addProperty(DEFAULT_CONFIG.ZINDEX.key, {
handler: this.configzIndex,
value: DEFAULT_CONFIG.ZINDEX.value
});
/**
* True if the Overlay should be prevented from being positioned
* out of the viewport.
* @config constraintoviewport
* @type Boolean
* @default false
*/
this.cfg.addProperty(DEFAULT_CONFIG.CONSTRAIN_TO_VIEWPORT.key, {
handler: this.configConstrainToViewport,
value: DEFAULT_CONFIG.CONSTRAIN_TO_VIEWPORT.value,
validator: DEFAULT_CONFIG.CONSTRAIN_TO_VIEWPORT.validator,
supercedes: DEFAULT_CONFIG.CONSTRAIN_TO_VIEWPORT.supercedes
});
/**
* @config iframe
* @description Boolean indicating whether or not the Overlay should
* have an IFRAME shim; used to prevent SELECT elements from
* poking through an Overlay instance in IE6. When set to "true",
* the iframe shim is created when the Overlay instance is intially
* made visible.
* @type Boolean
* @default true for IE6 and below, false for all other browsers.
*/
this.cfg.addProperty(DEFAULT_CONFIG.IFRAME.key, {
handler: this.configIframe,
value: DEFAULT_CONFIG.IFRAME.value,
validator: DEFAULT_CONFIG.IFRAME.validator,
supercedes: DEFAULT_CONFIG.IFRAME.supercedes
});
},
/**
* 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
*/
moveTo: function (x, y) {
this.cfg.setProperty("xy", [x, y]);
},
/**
* Adds a CSS class ("hide-scrollbars") and removes a CSS class
* ("show-scrollbars") to the Overlay to fix a bug in Gecko on Mac OS X
* (https://bugzilla.mozilla.org/show_bug.cgi?id=187435)
* @method hideMacGeckoScrollbars
*/
hideMacGeckoScrollbars: function () {
Dom.removeClass(this.element, "show-scrollbars");
Dom.addClass(this.element, "hide-scrollbars");
},
/**
* Adds a CSS class ("show-scrollbars") and removes a CSS class
* ("hide-scrollbars") to the Overlay to fix a bug in Gecko on Mac OS X
* (https://bugzilla.mozilla.org/show_bug.cgi?id=187435)
* @method showMacGeckoScrollbars
*/
showMacGeckoScrollbars: function () {
Dom.removeClass(this.element, "hide-scrollbars");
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.
*/
configVisible: function (type, args, obj) {
var visible = args[0],
currentVis = Dom.getStyle(this.element, "visibility"),
effect = this.cfg.getProperty("effect"),
effectInstances = [],
isMacGecko = (this.platform == "mac" && YAHOO.env.ua.gecko),
alreadySubscribed = Config.alreadySubscribed,
eff, ei, e, i, j, k, h,
nEffects,
nEffectInstances;
if (currentVis == "inherit") {
e = this.element.parentNode;
while (e.nodeType != 9 && e.nodeType != 11) {
currentVis = Dom.getStyle(e, "visibility");
if (currentVis != "inherit") {
break;
}
e = e.parentNode;
}
if (currentVis == "inherit") {
currentVis = "visible";
}
}
if (effect) {
if (effect instanceof Array) {
nEffects = effect.length;
for (i = 0; i < nEffects; i++) {
eff = effect[i];
effectInstances[effectInstances.length] =
eff.effect(this, eff.duration);
}
} else {
effectInstances[effectInstances.length] =
effect.effect(this, effect.duration);
}
}
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();
nEffectInstances = effectInstances.length;
for (j = 0; j < nEffectInstances; j++) {
ei = effectInstances[j];
if (j === 0 && !alreadySubscribed(
ei.animateInCompleteEvent,
this.showEvent.fire, this.showEvent)) {
/*
Delegate showEvent until end
of animateInComplete
*/
ei.animateInCompleteEvent.subscribe(
this.showEvent.fire, this.showEvent, true);
}
ei.animateIn();
}
}
}
} else { // Show
if (currentVis != "visible" || currentVis === "") {
this.beforeShowEvent.fire();
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();
nEffectInstances = effectInstances.length;
for (k = 0; k < nEffectInstances; k++) {
h = effectInstances[k];
if (k === 0 && !alreadySubscribed(
h.animateOutCompleteEvent, this.hideEvent.fire,
this.hideEvent)) {
/*
Delegate hideEvent until end
of animateOutComplete
*/
h.animateOutCompleteEvent.subscribe(
this.hideEvent.fire, this.hideEvent, true);
}
h.animateOut();
}
} else if (currentVis === "") {
Dom.setStyle(this.element, "visibility", "hidden");
}
} else { // Simple hide
if (currentVis == "visible" || currentVis === "") {
this.beforeHideEvent.fire();
Dom.setStyle(this.element, "visibility", "hidden");
this.hideEvent.fire();
}
}
}
},
/**
* Center event handler used for centering on scroll/resize, but only if
* the Overlay is visible
* @method doCenterOnDOMEvent
*/
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.
*/
configFixedCenter: function (type, args, obj) {
var val = args[0],
alreadySubscribed = Config.alreadySubscribed,
windowResizeEvent = Overlay.windowResizeEvent,
windowScrollEvent = Overlay.windowScrollEvent;
if (val) {
this.center();
if (!alreadySubscribed(this.beforeShowEvent, this.center, this)) {
this.beforeShowEvent.subscribe(this.center);
}
if (!alreadySubscribed(windowResizeEvent, this.doCenterOnDOMEvent, this)) {
windowResizeEvent.subscribe(this.doCenterOnDOMEvent, this, true);
}
if (!alreadySubscribed(windowScrollEvent, this.doCenterOnDOMEvent, this)) {
windowScrollEvent.subscribe(this.doCenterOnDOMEvent, this, true);
}
} else {
this.beforeShowEvent.unsubscribe(this.center);
windowResizeEvent.unsubscribe(this.doCenterOnDOMEvent, this);
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.
*/
configHeight: function (type, args, obj) {
var height = args[0],
el = this.element;
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.
*/
configWidth: function (type, args, obj) {
var width = args[0],
el = this.element;
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.
*/
configzIndex: function (type, args, obj) {
var zIndex = args[0],
el = this.element;
if (! zIndex) {
zIndex = Dom.getStyle(el, "zIndex");
if (! zIndex || isNaN(zIndex)) {
zIndex = 0;
}
}
if (this.iframe || this.cfg.getProperty("iframe") === true) {
if (zIndex <= 0) {
zIndex = 1;
}
}
Dom.setStyle(el, "zIndex", zIndex);
this.cfg.setProperty("zIndex", zIndex, true);
if (this.iframe) {
this.stackIframe();
}
},
/**
* 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.
*/
configXY: function (type, args, obj) {
var pos = args[0],
x = pos[0],
y = pos[1];
this.cfg.setProperty("x", x);
this.cfg.setProperty("y", y);
this.beforeMoveEvent.fire([x, y]);
x = this.cfg.getProperty("x");
y = this.cfg.getProperty("y");
YAHOO.log(("xy: " + [x, y]), "iframe");
this.cfg.refireEvent("iframe");
this.moveEvent.fire([x, y]);
},
/**
* The default event handler fired when the "x" property is changed.
* @method configX
* @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.
*/
configX: function (type, args, obj) {
var x = args[0],
y = this.cfg.getProperty("y");
this.cfg.setProperty("x", x, true);
this.cfg.setProperty("y", y, true);
this.beforeMoveEvent.fire([x, y]);
x = this.cfg.getProperty("x");
y = this.cfg.getProperty("y");
Dom.setX(this.element, x, true);
this.cfg.setProperty("xy", [x, y], true);
this.cfg.refireEvent("iframe");
this.moveEvent.fire([x, y]);
},
/**
* The default event handler fired when the "y" property is changed.
* @method configY
* @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.
*/
configY: function (type, args, obj) {
var x = this.cfg.getProperty("x"),
y = args[0];
this.cfg.setProperty("x", x, true);
this.cfg.setProperty("y", y, true);
this.beforeMoveEvent.fire([x, y]);
x = this.cfg.getProperty("x");
y = this.cfg.getProperty("y");
Dom.setY(this.element, y, true);
this.cfg.setProperty("xy", [x, y], true);
this.cfg.refireEvent("iframe");
this.moveEvent.fire([x, y]);
},
/**
* Shows the iframe shim, if it has been enabled.
* @method showIframe
*/
showIframe: function () {
var oIFrame = this.iframe,
oParentNode;
if (oIFrame) {
oParentNode = this.element.parentNode;
if (oParentNode != oIFrame.parentNode) {
this._addToParent(oParentNode, oIFrame);
}
oIFrame.style.display = "block";
}
},
/**
* Hides the iframe shim, if it has been enabled.
* @method hideIframe
*/
hideIframe: function () {
if (this.iframe) {
this.iframe.style.display = "none";
}
},
/**
* Syncronizes the size and position of iframe shim to that of its
* corresponding Overlay instance.
* @method syncIframe
*/
syncIframe: function () {
var oIFrame = this.iframe,
oElement = this.element,
nOffset = Overlay.IFRAME_OFFSET,
nDimensionOffset = (nOffset * 2),
aXY;
if (oIFrame) {
// Size <iframe>
oIFrame.style.width = (oElement.offsetWidth + nDimensionOffset + "px");
oIFrame.style.height = (oElement.offsetHeight + nDimensionOffset + "px");
// Position <iframe>
aXY = this.cfg.getProperty("xy");
if (!Lang.isArray(aXY) || (isNaN(aXY[0]) || isNaN(aXY[1]))) {
this.syncPosition();
aXY = this.cfg.getProperty("xy");
}
Dom.setXY(oIFrame, [(aXY[0] - nOffset), (aXY[1] - nOffset)]);
}
},
/**
* Sets the zindex of the iframe shim, if it exists, based on the zindex of
* the Overlay element. The zindex of the iframe is set to be one less
* than the Overlay element's zindex.
*
* <p>NOTE: This method will not bump up the zindex of the Overlay element
* to ensure that the iframe shim has a non-negative zindex.
* If you require the iframe zindex to be 0 or higher, the zindex of
* the Overlay element should be set to a value greater than 0, before
* this method is called.
* </p>
* @method stackIframe
*/
stackIframe: function () {
if (this.iframe) {
var overlayZ = Dom.getStyle(this.element, "zIndex");
if (!YAHOO.lang.isUndefined(overlayZ) && !isNaN(overlayZ)) {
Dom.setStyle(this.iframe, "zIndex", (overlayZ - 1));
}
}
},
/**
* The default event handler fired when the "iframe" property is changed.
* @method configIframe
* @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.
*/
configIframe: function (type, args, obj) {
var bIFrame = args[0];
function createIFrame() {
var oIFrame = this.iframe,
oElement = this.element,
oParent;
if (!oIFrame) {
if (!m_oIFrameTemplate) {
m_oIFrameTemplate = document.createElement("iframe");
if (this.isSecure) {
m_oIFrameTemplate.src = Overlay.IFRAME_SRC;
}
/*
Set the opacity of the <iframe> to 0 so that it
doesn't modify the opacity of any transparent
elements that may be on top of it (like a shadow).
*/
if (YAHOO.env.ua.ie) {
m_oIFrameTemplate.style.filter = "alpha(opacity=0)";
/*
Need to set the "frameBorder" property to 0
supress the default <iframe> border in IE.
Setting the CSS "border" property alone
doesn't supress it.
*/
m_oIFrameTemplate.frameBorder = 0;
}
else {
m_oIFrameTemplate.style.opacity = "0";
}
m_oIFrameTemplate.style.position = "absolute";
m_oIFrameTemplate.style.border = "none";
m_oIFrameTemplate.style.margin = "0";
m_oIFrameTemplate.style.padding = "0";
m_oIFrameTemplate.style.display = "none";
}
oIFrame = m_oIFrameTemplate.cloneNode(false);
oParent = oElement.parentNode;
var parentNode = oParent || document.body;
this._addToParent(parentNode, oIFrame);
this.iframe = oIFrame;
}
/*
Show the <iframe> before positioning it since the "setXY"
method of DOM requires the element be in the document
and visible.
*/
this.showIframe();
/*
Syncronize the size and position of the <iframe> to that
of the Overlay.
*/
this.syncIframe();
this.stackIframe();
// Add event listeners to update the <iframe> when necessary
if (!this._hasIframeEventListeners) {
this.showEvent.subscribe(this.showIframe);
this.hideEvent.subscribe(this.hideIframe);
this.changeContentEvent.subscribe(this.syncIframe);
this._hasIframeEventListeners = true;
}
}
function onBeforeShow() {
createIFrame.call(this);
this.beforeShowEvent.unsubscribe(onBeforeShow);
this._iframeDeferred = false;
}
if (bIFrame) { // <iframe> shim is enabled
if (this.cfg.getProperty("visible")) {
createIFrame.call(this);
} else {
if (!this._iframeDeferred) {
this.beforeShowEvent.subscribe(onBeforeShow);
this._iframeDeferred = true;
}
}
} else { // <iframe> shim is disabled
this.hideIframe();
if (this._hasIframeEventListeners) {
this.showEvent.unsubscribe(this.showIframe);
this.hideEvent.unsubscribe(this.hideIframe);
this.changeContentEvent.unsubscribe(this.syncIframe);
this._hasIframeEventListeners = false;
}
}
},
/**
* The default event handler fired when the "constraintoviewport"
* property is changed.
* @method configConstrainToViewport
* @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.
*/
configConstrainToViewport: function (type, args, obj) {
function constrainBeforeShow() {
if (YAHOO.lang.isUndefined(this.cfg.getProperty("xy"))) {
// Set CFG XY based on DOM XY
this.syncPosition();
}
var x = this.cfg.getProperty("x");
var y = this.cfg.getProperty("y");
// Account for XY being set silently (no moveTo fired/called)
var cXY = this.getConstrainedXY(x, y);
if (cXY[0] !== x || cXY[1] !== y) {
this.moveTo(cXY[0], cXY[1]);
}
}
var val = args[0];
if (val) {
if (! Config.alreadySubscribed(this.beforeMoveEvent, this.enforceConstraints, this)) {
this.beforeMoveEvent.subscribe(this.enforceConstraints, this, true);
}
if (! Config.alreadySubscribed(this.beforeShowEvent, constrainBeforeShow)) {
this.beforeShowEvent.subscribe(constrainBeforeShow);
}
} else {
this.beforeShowEvent.unsubscribe(constrainBeforeShow);
this.beforeMoveEvent.unsubscribe(this.enforceConstraints, this);
}
},
/**
* The default event handler fired when the "context" property
* is changed.
* @method configContext
* @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.
*/
configContext: function (type, args, obj) {
var contextArgs = args[0],
contextEl,
elementMagnetCorner,
contextMagnetCorner;
if (contextArgs) {
contextEl = contextArgs[0];
elementMagnetCorner = contextArgs[1];
contextMagnetCorner = contextArgs[2];
if (contextEl) {
if (typeof contextEl == "string") {
this.cfg.setProperty("context",
[document.getElementById(contextEl),
elementMagnetCorner, contextMagnetCorner],
true);
}
if (elementMagnetCorner && contextMagnetCorner) {
this.align(elementMagnetCorner, contextMagnetCorner);
}
}
}
},
// END BUILT-IN PROPERTY EVENT HANDLERS //
/**
* Aligns the Overlay to its context element using the specified corner
* points (represented by the constants TOP_LEFT, TOP_RIGHT, BOTTOM_LEFT,
* and BOTTOM_RIGHT.
* @method align
* @param {String} elementAlign The String representing the corner of
* the Overlay that should be aligned to the context element
* @param {String} contextAlign The corner of the context element
* that the elementAlign corner should stick to.
*/
align: function (elementAlign, contextAlign) {
var contextArgs = this.cfg.getProperty("context"),
me = this,
context,
element,
contextRegion;
function doAlign(v, h) {
switch (elementAlign) {
case Overlay.TOP_LEFT:
me.moveTo(h, v);
break;
case Overlay.TOP_RIGHT:
me.moveTo((h - element.offsetWidth), v);
break;
case Overlay.BOTTOM_LEFT:
me.moveTo(h, (v - element.offsetHeight));
break;
case Overlay.BOTTOM_RIGHT:
me.moveTo((h - element.offsetWidth),
(v - element.offsetHeight));
break;
}
}
if (contextArgs) {
context = contextArgs[0];
element = this.element;
me = this;
if (! elementAlign) {
elementAlign = contextArgs[1];
}
if (! contextAlign) {
contextAlign = contextArgs[2];
}
if (element && context) {
contextRegion = Dom.getRegion(context);
switch (contextAlign) {
case Overlay.TOP_LEFT:
doAlign(contextRegion.top, contextRegion.left);
break;
case Overlay.TOP_RIGHT:
doAlign(contextRegion.top, contextRegion.right);
break;
case Overlay.BOTTOM_LEFT:
doAlign(contextRegion.bottom, contextRegion.left);
break;
case Overlay.BOTTOM_RIGHT:
doAlign(contextRegion.bottom, contextRegion.right);
break;
}
}
}
},
/**
* The default event handler executed when the moveEvent is fired, if the
* "constraintoviewport" is set to true.
* @method enforceConstraints
* @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.
*/
enforceConstraints: function (type, args, obj) {
var pos = args[0];
var cXY = this.getConstrainedXY(pos[0], pos[1]);
this.cfg.setProperty("x", cXY[0], true);
this.cfg.setProperty("y", cXY[1], true);
this.cfg.setProperty("xy", cXY, true);
},
/**
* Given x, y coordinate values, returns the calculated coordinates required to
* position the Overlay if it is to be constrained to the viewport, based on the
* current element size, viewport dimensions and scroll values.
*
* @param {Number} x The X coordinate value to be constrained
* @param {Number} y The Y coordinate value to be constrained
* @return {Array} The constrained x and y coordinates at index 0 and 1 respectively;
*/
getConstrainedXY: function(x, y) {
var nViewportOffset = Overlay.VIEWPORT_OFFSET,
viewPortWidth = Dom.getViewportWidth(),
viewPortHeight = Dom.getViewportHeight(),
offsetHeight = this.element.offsetHeight,
offsetWidth = this.element.offsetWidth,
scrollX = Dom.getDocumentScrollLeft(),
scrollY = Dom.getDocumentScrollTop();
var xNew = x;
var yNew = y;
if (offsetWidth + nViewportOffset < viewPortWidth) {
var leftConstraint = scrollX + nViewportOffset;
var rightConstraint = scrollX + viewPortWidth - offsetWidth - nViewportOffset;
if (x < leftConstraint) {
xNew = leftConstraint;
} else if (x > rightConstraint) {
xNew = rightConstraint;
}
} else {
xNew = nViewportOffset + scrollX;
}
if (offsetHeight + nViewportOffset < viewPortHeight) {
var topConstraint = scrollY + nViewportOffset;
var bottomConstraint = scrollY + viewPortHeight - offsetHeight - nViewportOffset;
if (y < topConstraint) {
yNew = topConstraint;
} else if (y > bottomConstraint) {
yNew = bottomConstraint;
}
} else {
yNew = nViewportOffset + scrollY;
}
return [xNew, yNew];
},
/**
* Centers the container in the viewport.
* @method center
*/
center: function () {
var nViewportOffset = Overlay.VIEWPORT_OFFSET,
elementWidth = this.element.offsetWidth,
elementHeight = this.element.offsetHeight,
viewPortWidth = Dom.getViewportWidth(),
viewPortHeight = Dom.getViewportHeight(),
x,
y;
if (elementWidth < viewPortWidth) {
x = (viewPortWidth / 2) - (elementWidth / 2) + Dom.getDocumentScrollLeft();
} else {
x = nViewportOffset + Dom.getDocumentScrollLeft();
}
if (elementHeight < viewPortHeight) {
y = (viewPortHeight / 2) - (elementHeight / 2) + Dom.getDocumentScrollTop();
} else {
y = nViewportOffset + Dom.getDocumentScrollTop();
}
this.cfg.setProperty("xy", [parseInt(x, 10), parseInt(y, 10)]);
this.cfg.refireEvent("iframe");
},
/**
* Synchronizes the Panel's "xy", "x", and "y" properties with the
* Panel's position in the DOM. This is primarily used to update
* position information during drag & drop.
* @method syncPosition
*/
syncPosition: function () {
var pos = Dom.getXY(this.element);
this.cfg.setProperty("x", pos[0], true);
this.cfg.setProperty("y", pos[1], true);
this.cfg.setProperty("xy", pos, true);
},
/**
* Event handler fired when the resize monitor element is resized.
* @method onDomResize
* @param {DOMEvent} e The resize DOM event
* @param {Object} obj The scope object
*/
onDomResize: function (e, obj) {
var me = this;
Overlay.superclass.onDomResize.call(this, e, obj);
setTimeout(function () {
me.syncPosition();
me.cfg.refireEvent("iframe");
me.cfg.refireEvent("context");
}, 0);
},
/**
* Places the Overlay on top of all other instances of
* YAHOO.widget.Overlay.
* @method bringToTop
*/
bringToTop: function () {
var aOverlays = [],
oElement = this.element;
function compareZIndexDesc(p_oOverlay1, p_oOverlay2) {
var sZIndex1 = Dom.getStyle(p_oOverlay1, "zIndex"),
sZIndex2 = Dom.getStyle(p_oOverlay2, "zIndex"),
nZIndex1 = (!sZIndex1 || isNaN(sZIndex1)) ? 0 : parseInt(sZIndex1, 10),
nZIndex2 = (!sZIndex2 || isNaN(sZIndex2)) ? 0 : parseInt(sZIndex2, 10);
if (nZIndex1 > nZIndex2) {
return -1;
} else if (nZIndex1 < nZIndex2) {
return 1;
} else {
return 0;
}
}
function isOverlayElement(p_oElement) {
var oOverlay = Dom.hasClass(p_oElement, Overlay.CSS_OVERLAY),
Panel = YAHOO.widget.Panel;
if (oOverlay && !Dom.isAncestor(oElement, oOverlay)) {
if (Panel && Dom.hasClass(p_oElement, Panel.CSS_PANEL)) {
aOverlays[aOverlays.length] = p_oElement.parentNode;
} else {
aOverlays[aOverlays.length] = p_oElement;
}
}
}
Dom.getElementsBy(isOverlayElement, "DIV", document.body);
aOverlays.sort(compareZIndexDesc);
var oTopOverlay = aOverlays[0],
nTopZIndex;
if (oTopOverlay) {
nTopZIndex = Dom.getStyle(oTopOverlay, "zIndex");
if (!isNaN(nTopZIndex)) {
var bRequiresBump = false;
if (oTopOverlay != oElement) {
bRequiresBump = true;
} else if (aOverlays.length > 1) {
var nNextZIndex = Dom.getStyle(aOverlays[1], "zIndex");
// Don't rely on DOM order to stack if 2 overlays are at the same zindex.
if (!isNaN(nNextZIndex) && (nTopZIndex == nNextZIndex)) {
bRequiresBump = true;
}
}
if (bRequiresBump) {
this.cfg.setProperty("zindex", (parseInt(nTopZIndex, 10) + 2));
}
}
}
},
/**
* Removes the Overlay element from the DOM and sets all child
* elements to null.
* @method destroy
*/
destroy: function () {
if (this.iframe) {
this.iframe.parentNode.removeChild(this.iframe);
}
this.iframe = null;
Overlay.windowResizeEvent.unsubscribe(
this.doCenterOnDOMEvent, this);
Overlay.windowScrollEvent.unsubscribe(
this.doCenterOnDOMEvent, this);
Overlay.superclass.destroy.call(this);
},
/**
* Returns a String representation of the object.
* @method toString
* @return {String} The string representation of the Overlay.
*/
toString: function () {
return "Overlay " + this.id;
}
});
}());