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+/*!
+ * jQuery resize event - v1.1 - 3/14/2010
+ * http://benalman.com/projects/jquery-resize-plugin/
+ *
+ * Copyright (c) 2010 "Cowboy" Ben Alman
+ * Dual licensed under the MIT and GPL licenses.
+ * http://benalman.com/about/license/
+ */
+
+// Script: jQuery resize event
+//
+// *Version: 1.1, Last updated: 3/14/2010*
+//
+// Project Home - http://benalman.com/projects/jquery-resize-plugin/
+// GitHub - http://github.com/cowboy/jquery-resize/
+// Source - http://github.com/cowboy/jquery-resize/raw/master/jquery.ba-resize.js
+// (Minified) - http://github.com/cowboy/jquery-resize/raw/master/jquery.ba-resize.min.js (1.0kb)
+//
+// About: License
+//
+// Copyright (c) 2010 "Cowboy" Ben Alman,
+// Dual licensed under the MIT and GPL licenses.
+// http://benalman.com/about/license/
+//
+// About: Examples
+//
+// This working example, complete with fully commented code, illustrates a few
+// ways in which this plugin can be used.
+//
+// resize event - http://benalman.com/code/projects/jquery-resize/examples/resize/
+//
+// About: Support and Testing
+//
+// Information about what version or versions of jQuery this plugin has been
+// tested with, what browsers it has been tested in, and where the unit tests
+// reside (so you can test it yourself).
+//
+// jQuery Versions - 1.3.2, 1.4.1, 1.4.2
+// Browsers Tested - Internet Explorer 6-8, Firefox 2-3.6, Safari 3-4, Chrome, Opera 9.6-10.1.
+// Unit Tests - http://benalman.com/code/projects/jquery-resize/unit/
+//
+// About: Release History
+//
+// 1.1 - (3/14/2010) Fixed a minor bug that was causing the event to trigger
+// immediately after bind in some circumstances. Also changed $.fn.data
+// to $.data to improve performance.
+// 1.0 - (2/10/2010) Initial release
+
+(function ($, window, undefined) {
+ '$:nomunge'; // Used by YUI compressor.
+
+ // A jQuery object containing all non-window elements to which the resize
+ // event is bound.
+ var elems = $([]),
+
+ // Extend $.resize if it already exists, otherwise create it.
+ jq_resize = $.resize = $.extend($.resize, {}),
+
+ timeout_id,
+
+ // Reused strings.
+ str_setTimeout = 'setTimeout',
+ str_resize = 'resize',
+ str_data = str_resize + '-special-event',
+ str_delay = 'delay',
+ str_throttle = 'throttleWindow';
+
+ // Property: jQuery.resize.delay
+ //
+ // The numeric interval (in milliseconds) at which the resize event polling
+ // loop executes. Defaults to 250.
+
+ jq_resize[ str_delay ] = 250;
+
+ // Property: jQuery.resize.throttleWindow
+ //
+ // Throttle the native window object resize event to fire no more than once
+ // every <jQuery.resize.delay> milliseconds. Defaults to true.
+ //
+ // Because the window object has its own resize event, it doesn't need to be
+ // provided by this plugin, and its execution can be left entirely up to the
+ // browser. However, since certain browsers fire the resize event continuously
+ // while others do not, enabling this will throttle the window resize event,
+ // making event behavior consistent across all elements in all browsers.
+ //
+ // While setting this property to false will disable window object resize
+ // event throttling, please note that this property must be changed before any
+ // window object resize event callbacks are bound.
+
+ jq_resize[ str_throttle ] = true;
+
+ // Event: resize event
+ //
+ // Fired when an element's width or height changes. Because browsers only
+ // provide this event for the window element, for other elements a polling
+ // loop is initialized, running every <jQuery.resize.delay> milliseconds
+ // to see if elements' dimensions have changed. You may bind with either
+ // .resize( fn ) or .bind( "resize", fn ), and unbind with .unbind( "resize" ).
+ //
+ // Usage:
+ //
+ // > jQuery('selector').bind( 'resize', function(e) {
+ // > // element's width or height has changed!
+ // > ...
+ // > });
+ //
+ // Additional Notes:
+ //
+ // * The polling loop is not created until at least one callback is actually
+ // bound to the 'resize' event, and this single polling loop is shared
+ // across all elements.
+ //
+ // Double firing issue in jQuery 1.3.2:
+ //
+ // While this plugin works in jQuery 1.3.2, if an element's event callbacks
+ // are manually triggered via .trigger( 'resize' ) or .resize() those
+ // callbacks may double-fire, due to limitations in the jQuery 1.3.2 special
+ // events system. This is not an issue when using jQuery 1.4+.
+ //
+ // > // While this works in jQuery 1.4+
+ // > $(elem).css({ width: new_w, height: new_h }).resize();
+ // >
+ // > // In jQuery 1.3.2, you need to do this:
+ // > var elem = $(elem);
+ // > elem.css({ width: new_w, height: new_h });
+ // > elem.data( 'resize-special-event', { width: elem.width(), height: elem.height() } );
+ // > elem.resize();
+
+ $.event.special[ str_resize ] = {
+
+ // Called only when the first 'resize' event callback is bound per element.
+ setup: function () {
+ // Since window has its own native 'resize' event, return false so that
+ // jQuery will bind the event using DOM methods. Since only 'window'
+ // objects have a .setTimeout method, this should be a sufficient test.
+ // Unless, of course, we're throttling the 'resize' event for window.
+ if (!jq_resize[ str_throttle ] && this[ str_setTimeout ]) {
+ return false;
+ }
+
+ var elem = $(this);
+
+ // Add this element to the list of internal elements to monitor.
+ elems = elems.add(elem);
+
+ // Initialize data store on the element.
+ $.data(this, str_data, { w: elem.width(), h: elem.height() });
+
+ // If this is the first element added, start the polling loop.
+ if (elems.length === 1) {
+ loopy();
+ }
+ },
+
+ // Called only when the last 'resize' event callback is unbound per element.
+ teardown: function () {
+ // Since window has its own native 'resize' event, return false so that
+ // jQuery will unbind the event using DOM methods. Since only 'window'
+ // objects have a .setTimeout method, this should be a sufficient test.
+ // Unless, of course, we're throttling the 'resize' event for window.
+ if (!jq_resize[ str_throttle ] && this[ str_setTimeout ]) {
+ return false;
+ }
+
+ var elem = $(this);
+
+ // Remove this element from the list of internal elements to monitor.
+ elems = elems.not(elem);
+
+ // Remove any data stored on the element.
+ elem.removeData(str_data);
+
+ // If this is the last element removed, stop the polling loop.
+ if (!elems.length) {
+ clearTimeout(timeout_id);
+ }
+ },
+
+ // Called every time a 'resize' event callback is bound per element (new in
+ // jQuery 1.4).
+ add: function (handleObj) {
+ // Since window has its own native 'resize' event, return false so that
+ // jQuery doesn't modify the event object. Unless, of course, we're
+ // throttling the 'resize' event for window.
+ if (!jq_resize[ str_throttle ] && this[ str_setTimeout ]) {
+ return false;
+ }
+
+ var old_handler;
+
+ // The new_handler function is executed every time the event is triggered.
+ // This is used to update the internal element data store with the width
+ // and height when the event is triggered manually, to avoid double-firing
+ // of the event callback. See the "Double firing issue in jQuery 1.3.2"
+ // comments above for more information.
+
+ function new_handler(e, w, h) {
+ var elem = $(this),
+ data = $.data(this, str_data);
+
+ // If called from the polling loop, w and h will be passed in as
+ // arguments. If called manually, via .trigger( 'resize' ) or .resize(),
+ // those values will need to be computed.
+ data.w = w !== undefined ? w : elem.width();
+ data.h = h !== undefined ? h : elem.height();
+
+ old_handler.apply(this, arguments);
+ };
+
+ // This may seem a little complicated, but it normalizes the special event
+ // .add method between jQuery 1.4/1.4.1 and 1.4.2+
+ if ($.isFunction(handleObj)) {
+ // 1.4, 1.4.1
+ old_handler = handleObj;
+ return new_handler;
+ } else {
+ // 1.4.2+
+ old_handler = handleObj.handler;
+ handleObj.handler = new_handler;
+ }
+ }
+
+ };
+
+ function loopy() {
+
+ // Start the polling loop, asynchronously.
+ timeout_id = window[ str_setTimeout ](function () {
+
+ // Iterate over all elements to which the 'resize' event is bound.
+ elems.each(function () {
+ var elem = $(this),
+ width = elem.width(),
+ height = elem.height(),
+ data = $.data(this, str_data);
+
+ // If element size has changed since the last time, update the element
+ // data store and trigger the 'resize' event.
+ if (width !== data.w || height !== data.h) {
+ elem.trigger(str_resize, [ data.w = width, data.h = height ]);
+ }
+
+ });
+
+ // Loop.
+ loopy();
+
+ }, jq_resize[ str_delay ]);
+
+ };
+
+})(jQuery, this);