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// AJAX Plugin
// Docs Here:
// http://jquery.com/docs/ajax/
/**
* Load HTML from a remote file and inject it into the DOM
*/
$.fn.load = function( url, params, callback ) {
// I overwrote the event plugin's .load
// this won't happen again, I hope -John
if ( url && url.constructor == Function )
return this.bind("load", url);
// Default to a GET request
var type = "GET";
// If the second parameter was provided
if ( params ) {
// If it's a function
if ( params.constructor == Function ) {
// We assume that it's the callback
callback = params;
params = null;
// Otherwise, build a param string
} else {
params = $.param( params );
type = "POST";
}
}
var self = this;
// Request the remote document
$.ajax( type, url, params,function(res){
// Inject the HTML into all the matched elements
self.html(res.responseText).each(function(){
// If a callback function was provided
if ( callback && callback.constructor == Function )
// Execute it within the context of the element
callback.apply( self, [res.responseText] );
});
// Execute all the scripts inside of the newly-injected HTML
$("script", self).each(function(){
eval( this.text || this.textContent || this.innerHTML || "");
});
});
return this;
};
/**
* Load a remote page using a GET request
*/
$.get = function( url, callback, type ) {
// Build and start the HTTP Request
$.ajax( "GET", url, null, function(r) {
if ( callback ) callback( $.httpData(r,type) );
});
};
/**
* Load a remote page using a POST request.
*/
$.post = function( url, data, callback, type ) {
// Build and start the HTTP Request
$.ajax( "POST", url, $.param(data), function(r) {
if ( callback ) callback( $.httpData(r,type) );
});
};
// If IE is used, create a wrapper for the XMLHttpRequest object
if ( $.browser == "msie" )
XMLHttpRequest = function(){
return new ActiveXObject(
(navigator.userAgent.toLowerCase().indexOf("msie 5") >= 0) ?
"Microsoft.XMLHTTP" : "Msxml2.XMLHTTP"
);
};
// Attach a bunch of functions for handling common AJAX events
(function(){
var e = "ajaxStart.ajaxComplete.ajaxError.ajaxSuccess".split(',');
for ( var i = 0; i < e.length; i++ ){ (function(){
var o = e[i];
$.fn[o] = function(f){return this.bind(o, f);};
})();}
})();
/**
* A common wrapper for making XMLHttpRequests
*/
$.ajax = function( type, url, data, ret ) {
// If only a single argument was passed in,
// assume that it is a object of key/value pairs
if ( !url ) {
ret = type.complete;
var success = type.success;
var error = type.error;
data = type.data;
url = type.url;
type = type.type;
}
// Create the request object
var xml = new XMLHttpRequest();
// Open the socket
xml.open(type || "GET", url, true);
// Set the correct header, if data is being sent
if ( data )
xml.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
// Set header so calling script knows that it's an XMLHttpRequest
xml.setRequestHeader("X-Requested-With", "XMLHttpRequest");
// Make sure the browser sends the right content length
if ( xml.overrideMimeType )
xml.setRequestHeader("Connection", "close");
// Wait for a response to come back
xml.onreadystatechange = function(){
// Socket is openend
if ( xml.readyState == 1 ) {
// Increase counter
$.ajax.active++;
// Show 'loader'
$.event.trigger( "ajaxStart" );
}
// Socket is closed and data is available
if ( xml.readyState == 4 ) {
// Hide loader if needed
if ( ! --$.ajax.active ) {
$.event.trigger( "ajaxComplete" );
$.ajax.active = 0
}
// Make sure that the request was successful
if ( $.httpSuccess( xml ) ) {
// If a local callback was specified, fire it
if ( success ) success( xml );
// Fire the global callback
$.event.trigger( "ajaxSuccess" );
// Otherwise, the request was not successful
} else {
// If a local callback was specified, fire it
if ( error ) error( xml );
// Fire the global callback
$.event.trigger( "ajaxError" );
}
// Process result
if ( ret ) ret(xml);
}
};
// Send the data
xml.send(data);
};
// Counter for holding the number of active queries
$.ajax.active = 0;
// Determines if an XMLHttpRequest was successful or not
$.httpSuccess = function(r) {
return ( r.status && ( r.status >= 200 && r.status < 300 ) ||
r.status == 304 ) || !r.status && location.protocol == "file:";
};
// Get the data out of an XMLHttpRequest
$.httpData = function(r,type) {
// Check the headers, or watch for a force override
return r.getResponseHeader("content-type").indexOf("xml") > 0 ||
type == "xml" ? r.responseXML : r.responseText;
};
// Serialize an array of form elements or a set of
// key/values into a query string
$.param = function(a) {
var s = [];
// If an array was passed in, assume that it is an array
// of form elements
if ( a.constructor == Array )
// Serialize the form elements
for ( var i = 0; i < a.length; i++ )
s.push( a[i].name + "=" + encodeURIComponent( a[i].value ) );
// Otherwise, assume that it's an object of key/value pairs
else
// Serialize the key/values
for ( var j in a )
s.push( j + "=" + encodeURIComponent( a[j] ) );
// Return the resulting serialization
return s.join("&");
};
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