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/*! Copyright (c) 2010 Brandon Aaron (http://brandonaaron.net)
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* Dual licensed under the MIT (MIT_LICENSE.txt)
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* and GPL Version 2 (GPL_LICENSE.txt) licenses.
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*
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* Version: 1.1.1
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* Requires jQuery 1.3+
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* Docs: http://docs.jquery.com/Plugins/livequery
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*/
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(function ($) {
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$.extend($.fn, {
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livequery: function (type, fn, fn2) {
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var self = this, q;
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// Handle different call patterns
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if ($.isFunction(type))
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fn2 = fn, fn = type, type = undefined;
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// See if Live Query already exists
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$.each($.livequery.queries, function (i, query) {
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if (self.selector == query.selector && self.context == query.context &&
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type == query.type && (!fn || fn.$lqguid == query.fn.$lqguid) && (!fn2 || fn2.$lqguid == query.fn2.$lqguid))
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// Found the query, exit the each loop
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return (q = query) && false;
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});
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// Create new Live Query if it wasn't found
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q = q || new $.livequery(this.selector, this.context, type, fn, fn2);
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// Make sure it is running
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q.stopped = false;
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// Run it immediately for the first time
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q.run();
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// Contnue the chain
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return this;
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},
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expire: function (type, fn, fn2) {
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var self = this;
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// Handle different call patterns
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if ($.isFunction(type))
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fn2 = fn, fn = type, type = undefined;
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// Find the Live Query based on arguments and stop it
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$.each($.livequery.queries, function (i, query) {
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if (self.selector == query.selector && self.context == query.context &&
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(!type || type == query.type) && (!fn || fn.$lqguid == query.fn.$lqguid) && (!fn2 || fn2.$lqguid == query.fn2.$lqguid) && !this.stopped)
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$.livequery.stop(query.id);
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});
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// Continue the chain
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return this;
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}
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});
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$.livequery = function (selector, context, type, fn, fn2) {
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this.selector = selector;
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this.context = context;
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this.type = type;
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this.fn = fn;
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this.fn2 = fn2;
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this.elements = [];
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this.stopped = false;
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// The id is the index of the Live Query in $.livequery.queries
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this.id = $.livequery.queries.push(this) - 1;
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// Mark the functions for matching later on
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fn.$lqguid = fn.$lqguid || $.livequery.guid++;
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if (fn2) fn2.$lqguid = fn2.$lqguid || $.livequery.guid++;
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// Return the Live Query
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return this;
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};
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$.livequery.prototype = {
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stop: function () {
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var query = this;
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if (this.type)
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// Unbind all bound events
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this.elements.unbind(this.type, this.fn);
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else if (this.fn2)
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// Call the second function for all matched elements
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this.elements.each(function (i, el) {
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query.fn2.apply(el);
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});
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// Clear out matched elements
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this.elements = [];
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// Stop the Live Query from running until restarted
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this.stopped = true;
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},
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run: function () {
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// Short-circuit if stopped
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if (this.stopped) return;
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var query = this;
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var oEls = this.elements,
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els = $(this.selector, this.context),
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nEls = els.not(oEls);
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// Set elements to the latest set of matched elements
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this.elements = els;
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if (this.type) {
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// Bind events to newly matched elements
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nEls.bind(this.type, this.fn);
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// Unbind events to elements no longer matched
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if (oEls.length > 0)
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$.each(oEls, function (i, el) {
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if ($.inArray(el, els) < 0)
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$.event.remove(el, query.type, query.fn);
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});
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}
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else {
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// Call the first function for newly matched elements
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nEls.each(function () {
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query.fn.apply(this);
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});
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// Call the second function for elements no longer matched
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if (this.fn2 && oEls.length > 0)
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$.each(oEls, function (i, el) {
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if ($.inArray(el, els) < 0)
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query.fn2.apply(el);
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});
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}
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}
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};
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$.extend($.livequery, {
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guid: 0,
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queries: [],
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queue: [],
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running: false,
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timeout: null,
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checkQueue: function () {
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if ($.livequery.running && $.livequery.queue.length) {
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var length = $.livequery.queue.length;
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// Run each Live Query currently in the queue
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while (length--)
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$.livequery.queries[$.livequery.queue.shift()].run();
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}
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},
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pause: function () {
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// Don't run anymore Live Queries until restarted
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$.livequery.running = false;
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},
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play: function () {
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// Restart Live Queries
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$.livequery.running = true;
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// Request a run of the Live Queries
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$.livequery.run();
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},
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registerPlugin: function () {
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$.each(arguments, function (i, n) {
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// Short-circuit if the method doesn't exist
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if (!$.fn[n]) return;
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// Save a reference to the original method
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var old = $.fn[n];
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// Create a new method
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$.fn[n] = function () {
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// Call the original method
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var r = old.apply(this, arguments);
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// Request a run of the Live Queries
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$.livequery.run();
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// Return the original methods result
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return r;
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}
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});
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},
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run: function (id) {
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if (id != undefined) {
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// Put the particular Live Query in the queue if it doesn't already exist
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if ($.inArray(id, $.livequery.queue) < 0)
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$.livequery.queue.push(id);
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}
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else
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// Put each Live Query in the queue if it doesn't already exist
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$.each($.livequery.queries, function (id) {
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if ($.inArray(id, $.livequery.queue) < 0)
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$.livequery.queue.push(id);
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});
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// Clear timeout if it already exists
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if ($.livequery.timeout) clearTimeout($.livequery.timeout);
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// Create a timeout to check the queue and actually run the Live Queries
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$.livequery.timeout = setTimeout($.livequery.checkQueue, 20);
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},
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stop: function (id) {
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if (id != undefined)
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// Stop are particular Live Query
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$.livequery.queries[id].stop();
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else
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// Stop all Live Queries
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$.each($.livequery.queries, function (id) {
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$.livequery.queries[id].stop();
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});
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}
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});
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// Register core DOM manipulation methods
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$.livequery.registerPlugin('append', 'prepend', 'after', 'before', 'wrap', 'attr', 'removeAttr', 'addClass', 'removeClass', 'toggleClass', 'empty', 'remove', 'html');
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// Run Live Queries when the Document is ready
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$(function () { $.livequery.play(); });
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})(jQuery);
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kay.one
13 years ago