jquery.js

经典编程900例(C语言),主要是C基础知识

					r.push( s );

				if ( token == "#" && r.length ) break;

				if ( s.firstChild )
					jQuery.getAll( s, r, token, name, re );
			}

		return r;
	},
	parents: function( elem ){
		var matched = [];
		var cur = elem.parentNode;
		while ( cur && cur != document ) {
			matched.push( cur );
			cur = cur.parentNode;
		}
		return matched;
	},
	nth: function(cur,result,dir,elem){
		result = result || 1;
		var num = 0;
		for ( ; cur; cur = cur[dir] ) {
			if ( cur.nodeType == 1 ) num++;
			if ( num == result || result == "even" && num % 2 == 0 && num > 1 && cur == elem ||
				result == "odd" && num % 2 == 1 && cur == elem ) return cur;
		}
	},
	sibling: function( n, elem ) {
		var r = [];

		for ( ; n; n = n.nextSibling ) {
			if ( n.nodeType == 1 && (!elem || n != elem) )
				r.push( n );
		}

		return r;
	}
});
/*
 * A number of helper functions used for managing events.
 * Many of the ideas behind this code orignated from 
 * Dean Edwards' addEvent library.
 */
jQuery.event = {

	// Bind an event to an element
	// Original by Dean Edwards
	add: function(element, type, handler, data) {
		// For whatever reason, IE has trouble passing the window object
		// around, causing it to be cloned in the process
		if ( jQuery.browser.msie && element.setInterval != undefined )
			element = window;

		// if data is passed, bind to handler
		if( data ) 
			handler.data = data;

		// Make sure that the function being executed has a unique ID
		if ( !handler.guid )
			handler.guid = this.guid++;

		// Init the element's event structure
		if (!element.events)
			element.events = {};

		// Get the current list of functions bound to this event
		var handlers = element.events[type];

		// If it hasn't been initialized yet
		if (!handlers) {
			// Init the event handler queue
			handlers = element.events[type] = {};

			// Remember an existing handler, if it's already there
			if (element["on" + type])
				handlers[0] = element["on" + type];
		}

		// Add the function to the element's handler list
		handlers[handler.guid] = handler;

		// And bind the global event handler to the element
		element["on" + type] = this.handle;

		// Remember the function in a global list (for triggering)
		if (!this.global[type])
			this.global[type] = [];
		this.global[type].push( element );
	},

	guid: 1,
	global: {},

	// Detach an event or set of events from an element
	remove: function(element, type, handler) {
		if (element.events)
			if ( type && type.type )
				delete element.events[ type.type ][ type.handler.guid ];
			else if (type && element.events[type])
				if ( handler )
					delete element.events[type][handler.guid];
				else
					for ( var i in element.events[type] )
						delete element.events[type][i];
			else
				for ( var j in element.events )
					this.remove( element, j );
	},

	trigger: function(type,data,element) {
		// Clone the incoming data, if any
		data = jQuery.makeArray(data || []);

		// Handle a global trigger
		if ( !element )
			jQuery.each( this.global[type] || [], function(){
				jQuery.event.trigger( type, data, this );
			});

		// Handle triggering a single element
		else {
			var handler = element["on" + type ], val,
				fn = jQuery.isFunction( element[ type ] );

			if ( handler ) {
				// Pass along a fake event
				data.unshift( this.fix({ type: type, target: element }) );
	
				// Trigger the event
				if ( (val = handler.apply( element, data )) !== false )
					this.triggered = true;
			}

			if ( fn && val !== false )
				element[ type ]();

			this.triggered = false;
		}
	},

	handle: function(event) {
		// Handle the second event of a trigger and when
		// an event is called after a page has unloaded
		if ( typeof jQuery == "undefined" || jQuery.event.triggered ) return;

		// Empty object is for triggered events with no data
		event = jQuery.event.fix( event || window.event || {} ); 

		// returned undefined or false
		var returnValue;

		var c = this.events[event.type];

		var args = [].slice.call( arguments, 1 );
		args.unshift( event );

		for ( var j in c ) {
			// Pass in a reference to the handler function itself
			// So that we can later remove it
			args[0].handler = c[j];
			args[0].data = c[j].data;

			if ( c[j].apply( this, args ) === false ) {
				event.preventDefault();
				event.stopPropagation();
				returnValue = false;
			}
		}

		// Clean up added properties in IE to prevent memory leak
		if (jQuery.browser.msie) event.target = event.preventDefault = event.stopPropagation = event.handler = event.data = null;

		return returnValue;
	},

	fix: function(event) {
		// Fix target property, if necessary
		if ( !event.target && event.srcElement )
			event.target = event.srcElement;

		// Calculate pageX/Y if missing and clientX/Y available
		if ( event.pageX == undefined && event.clientX != undefined ) {
			var e = document.documentElement, b = document.body;
			event.pageX = event.clientX + (e.scrollLeft || b.scrollLeft);
			event.pageY = event.clientY + (e.scrollTop || b.scrollTop);
		}
				
		// check if target is a textnode (safari)
		if (jQuery.browser.safari && event.target.nodeType == 3) {
			// store a copy of the original event object 
			// and clone because target is read only
			var originalEvent = event;
			event = jQuery.extend({}, originalEvent);
			
			// get parentnode from textnode
			event.target = originalEvent.target.parentNode;
			
			// add preventDefault and stopPropagation since 
			// they will not work on the clone
			event.preventDefault = function() {
				return originalEvent.preventDefault();
			};
			event.stopPropagation = function() {
				return originalEvent.stopPropagation();
			};
		}
		
		// fix preventDefault and stopPropagation
		if (!event.preventDefault)
			event.preventDefault = function() {
				this.returnValue = false;
			};
			
		if (!event.stopPropagation)
			event.stopPropagation = function() {
				this.cancelBubble = true;
			};
			
		return event;
	}
};

jQuery.fn.extend({
	bind: function( type, data, fn ) {
		return this.each(function(){
			jQuery.event.add( this, type, fn || data, data );
		});
	},
	one: function( type, data, fn ) {
		return this.each(function(){
			jQuery.event.add( this, type, function(event) {
				jQuery(this).unbind(event);
				return (fn || data).apply( this, arguments);
			}, data);
		});
	},
	unbind: function( type, fn ) {
		return this.each(function(){
			jQuery.event.remove( this, type, fn );
		});
	},
	trigger: function( type, data ) {
		return this.each(function(){
			jQuery.event.trigger( type, data, this );
		});
	},
	toggle: function() {
		// Save reference to arguments for access in closure
		var a = arguments;

		return this.click(function(e) {
			// Figure out which function to execute
			this.lastToggle = this.lastToggle == 0 ? 1 : 0;
			
			// Make sure that clicks stop
			e.preventDefault();
			
			// and execute the function
			return a[this.lastToggle].apply( this, [e] ) || false;
		});
	},
	hover: function(f,g) {
		
		// A private function for handling mouse 'hovering'
		function handleHover(e) {
			// Check if mouse(over|out) are still within the same parent element
			var p = (e.type == "mouseover" ? e.fromElement : e.toElement) || e.relatedTarget;
	
			// Traverse up the tree
			while ( p && p != this ) try { p = p.parentNode } catch(e) { p = this; };
			
			// If we actually just moused on to a sub-element, ignore it
			if ( p == this ) return false;
			
			// Execute the right function
			return (e.type == "mouseover" ? f : g).apply(this, [e]);
		}
		
		// Bind the function to the two event listeners
		return this.mouseover(handleHover).mouseout(handleHover);
	},
	ready: function(f) {
		// If the DOM is already ready
		if ( jQuery.isReady )
			// Execute the function immediately
			f.apply( document, [jQuery] );
			
		// Otherwise, remember the function for later
		else {
			// Add the function to the wait list
			jQuery.readyList.push( function() { return f.apply(this, [jQuery]) } );
		}
	
		return this;
	}
});

jQuery.extend({
	/*
	 * All the code that makes DOM Ready work nicely.
	 */
	isReady: false,
	readyList: [],
	
	// Handle when the DOM is ready
	ready: function() {
		// Make sure that the DOM is not already loaded
		if ( !jQuery.isReady ) {
			// Remember that the DOM is ready
			jQuery.isReady = true;
			
			// If there are functions bound, to execute
			if ( jQuery.readyList ) {
				// Execute all of them
				jQuery.each( jQuery.readyList, function(){
					this.apply( document );
				});
				
				// Reset the list of functions
				jQuery.readyList = null;
			}
			// Remove event lisenter to avoid memory leak
			if ( jQuery.browser.mozilla || jQuery.browser.opera )
				document.removeEventListener( "DOMContentLoaded", jQuery.ready, false );
		}
	}
});

new function(){

	jQuery.each( ("blur,focus,load,resize,scroll,unload,click,dblclick," +
		"mousedown,mouseup,mousemove,mouseover,mouseout,change,select," + 
		"submit,keydown,keypress,keyup,error").split(","), function(i,o){
		
		// Handle event binding
		jQuery.fn[o] = function(f){
			return f ? this.bind(o, f) : this.trigger(o);
		};
			
	});
	
	// If Mozilla is used
	if ( jQuery.browser.mozilla || jQuery.browser.opera )
		// Use the handy event callback
		document.addEventListener( "DOMContentLoaded", jQuery.ready, false );
	
	// If IE is used, use the excellent hack by Matthias Miller
	// http://www.outofhanwell.com/blog/index.php?title=the_window_onload_problem_revisited
	else if ( jQuery.browser.msie ) {
	
		// Only works if you document.write() it
		document.write("<scr" + "ipt id=__ie_init defer=true " + 
			"src=//:><\/script>");
	
		// Use the defer script hack
		var script = document.getElementById("__ie_init");
		
		// script does not exist if jQuery is loaded dynamically
		if ( script ) 
			script.onreadystatechange = function() {
				if ( this.readyState != "complete" ) return;
				this.parentNode.removeChild( this );
				jQuery.ready();
			};
	
		// Clear from memory
		script = null;
	
	// If Safari  is used
	} else if ( jQuery.browser.safari )
		// Continually check to see if the document.readyState is valid
		jQuery.safariTimer = setInterval(function(){
			// loaded and complete are both valid states
			if ( document.readyState == "loaded" || 
				document.readyState == "complete" ) {
	
				// If either one are found, remove the timer
				clearInterval( jQuery.safariTimer );
				jQuery.safariTimer = null;
	
				// and execute any waiting functions
				jQuery.ready();
			}
		}, 10); 

	// A fallback to window.onload, that will always work
	jQuery.event.add( window, "load", jQuery.ready );
	
};

// Clean up after IE to avoid memory leaks
if (jQuery.browser.msie)
	jQuery(window).one("unload", function() {
		var global = jQuery.event.global;
		for ( var type in global ) {
			var els = global[type], i = els.length;
			if ( i && type != 'unload' )
				do
					jQuery.event.remove(els[i-1], type);
				while (--i);
		}
	});
jQuery.fn.extend({

	show: function(speed,callback){
		var hidden = this.filter(":hidden");
		speed ?
			hidden.animate({
				height: "show", width: "show", opacity: "show"
			}, speed, callback) :
			
			hidden.each(function(){
				this.style.display = this.oldblock ? this.oldblock : "";
				if ( jQuery.css(this,"display") == "none" )
					this.style.display = "block";
			});
		return this;
	},

	hide: function(speed,callback){
		var visible = this.filter(":visible");
		speed ?
			visible.animate({
				height: "hide", width: "hide", opacity: "hide"
			}, speed, callback) :
			
			visible.each(function(){
				this.oldblock = this.oldblock || jQuery.css(this,"display");
				if ( this.oldblock == "none" )
					this.oldblock = "block";
				this.style.display = "none";
			});
		return this;
	},

	// Save the old toggle function
	_toggle: jQuery.fn.toggle,
	toggle: function( fn, fn2 ){
		var args = arguments;
		return jQuery.isFunction(fn) && jQuery.isFunction(fn2) ?
			this._toggle( fn, fn2 ) :
			this.each(function(){
				jQuery(this)[ jQuery(this).is(":hidden") ? "show" : "hide" ]
					.apply( jQuery(this), args );
			});
	},
	slideDown: function(speed,callback){
		return this.animate({height: "show"}, speed, callback);
	},
	slideUp: function(speed,callback){
		return this.animate({height: "hide"}, speed, callback);
	},
	slideToggle: function(speed, callback){
		return this.each(function(){
			var state = jQuery(this).is(":hidden") ? "show" : "hide";
			jQuery(this).animate({height: state}, speed, callback);
		});
	},
	fadeIn: function(speed, callback){
		return this.animate({opacity: "show"}, speed, callback);
	},
	fadeOut: function(speed, callback){
		return this.animate({opacity: "hide"}, speed, callback);
	},
	fadeTo: function(speed,to,callback){
		return this.animate({opacity: to}, speed, callback);
	},
	animate: function( prop, speed, easing, callback ) {
		return this.queue(function(){
		
			this.curAnim = jQuery.extend({}, prop);
			var opt = jQuery.speed(speed, easing, callback);
			
			for ( var p in prop ) {
				var e = new jQuery.fx( this, opt, p );
				if ( prop[p].constructor == Number )
					e.custom( e.cur(), prop[p] );
				else
					e[ prop[p] ]( prop );
			}
			
		});
	},
	queue: function(type,fn){
		if ( !fn ) {
			fn = type;
			type = "fx";
		}
	
		return this.each(function(){
			if ( !this.queue )
				this.queue = {};
	
			if ( !this.queue[type] )
				this.queue[type] = [];
	
			this.queue[type].push( fn );
		
			if ( this.queue[type].length == 1 )
				fn.apply(this);
		});
	}

});

jQuery.extend({
	
	speed: function(speed, easing, fn) {
		var opt = speed && speed.constructor == Object ? speed : {
			complete: fn || !fn && easing || 
				jQuery.isFunction( speed ) && speed,
			duration: speed,
			easing: fn && easing || easing && easing.constructor != Function && easing
		};

		opt.duration = (opt.duration && opt.duration.constructor == Number ? 
			opt.duration : 
			{ slow: 600, fast: 200 }[opt.duration]) || 400;
	
		// Queueing
		opt.old = opt.complete;
		opt.complete = function(){
			jQuery.dequeue(this, "fx");
			if ( jQuery.isFunction( opt.old ) )
				opt.old.apply( this );
		};
	
		return opt;
	},
	
	easing: {},
	
	queue: {},
	
	dequeue: function(elem,type){
		type = type || "fx";
	
		if ( elem.queue && elem.queue[type] ) {
			// Remove self
			elem.queue[type].shift();
	
			// Get next function
			var f = elem.queue[type][0];
		
			if ( f ) f.apply( elem );
		}
	},

	/*
	 * I originally wrote fx() as a clone of moo.fx and in the process