jquery/ajax/ajax.js

324 lines
9.4 KiB
JavaScript

// AJAX Plugin
// Docs Here:
// http://jquery.com/docs/ajax/
if ( typeof XMLHttpRequest == 'undefined' && typeof window.ActiveXObject == 'function') {
XMLHttpRequest = function() {
return new ActiveXObject((navigator.userAgent.toLowerCase().indexOf('msie 5') >= 0) ?
"Microsoft.XMLHTTP" : "Msxml2.XMLHTTP");
};
}
// Counter for holding the active query's
$.xmlActive=0;
$.xml = function( type, url, data, ret ) {
var xml = new XMLHttpRequest();
if ( xml ) {
// Open the socket
xml.open(type || "GET", url, true);
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');
/* Force "Connection: close" for Mozilla browsers to work around
* a bug where XMLHttpReqeuest sends an incorrect Content-length
* header. See Mozilla Bugzilla #246651.
*/
if ( xml.overrideMimeType )
xml.setRequestHeader('Connection', 'close');
xml.onreadystatechange = function() {
// Socket is openend
if ( xml.readyState == 1 ) {
// Increase counter
$.xmlActive++;
// Show loader if needed
if ( ($.xmlActive >= 1) && ($.xmlCreate) )
$.xmlCreate();
}
// Socket is closed and data is available
if ( xml.readyState == 4 ) {
// Decrease counter
$.xmlActive--;
// Hide loader if needed
if ( ($.xmlActive <= 0) && ($.xmlDestroy) ) {
$.xmlDestroy();
$.xmlActive = 0
}
// Process result
if ( ret )
ret(xml);
}
};
xml.send(data)
}
};
$.httpData = function(r,type) {
return r.getResponseHeader("content-type").indexOf("xml") > 0 || type == "xml" ?
r.responseXML : r.responseText;
};
$.get = function( url, ret, type ) {
$.xml( "GET", url, null, function(r) {
if ( ret ) { ret( $.httpData(r,type) ); }
});
};
$.getXML = function( url, ret ) {
$.get( url, ret, "xml" );
};
$.post = function( url, data, ret, type ) {
$.xml( "POST", url, $.param(data), function(r) {
if ( ret ) { ret( $.httpData(r,type) ); }
});
};
$.postXML = function( url, data, ret ) {
$.post( url, data, ret, "xml" );
};
$.param = function(a) {
var s = [];
if (a && typeof a == 'object' && a.constructor == Array) {
for ( var i=0; i < a.length; i++ ) {
s[s.length] = a[i].name + "=" + encodeURIComponent( a[i].value );
}
} else {
for ( var j in a ) {
s[s.length] = j + "=" + encodeURIComponent( a[j] );
}
}
return s.join("&");
};
$.fn.load = function(a,o,f) {
// Arrrrghhhhhhhh!!
// I overwrote the event plugin's .load
// this won't happen again, I hope -John
if ( a && a.constructor == Function ) {
return this.bind("load", a);
}
var t = "GET";
if ( o && o.constructor == Function ) {
f = o;
o = null;
}
if (typeof o !== 'undefined') {
o = $.param(o);
t = "POST";
}
var self = this;
$.xml(t,a,o,function(res){
// Assign it and execute all scripts
self.html(res.responseText).find("script").each(function(){
try { $.execute( this.text || this.textContent || this.innerHTML || ""); } catch(e){}
});
// Callback function
if (f && f.constructor == Function)
f(res.responseText);
});
return this;
};
/**
* Initial frontend function to submit form variables. This function
* is for registering coordinates, in the case of an image being used
* as the submit element, and sets up an event to listen and wait for
* a form submit click. It then calls any following chained functions
* to actually gather the variables and submit them.
*
* Usage examples, when used with getForm().putForm():
*
* 1. Just eval the results returned from the backend.
* $('#form-id').form();
*
* 2. Render backend results directly to target ID (expects (x)HTML).
* $('#form-id').form('#target-id');
*
* 3. Submit to backend URL (form action) then call this function.
* $('#form-id').form(post_callback);
*
* 4. Load target ID with backend results then call a function.
* $('#form-id').form('#target-id', null, post_callback);
*
* 5. Call a browser function (for validation) and then (optionally)
* load server results to target ID.
* $('#form-id').form('#target-id', pre_callback);
*
* 6. Call validation function first then load server results to
* target ID and then also call a browser function.
* $('#form-id').form('#target-id', pre_callback, post_callback);
*
* @param target arg for the target id element to render
* @param pre_cb callback function before submission
* @param post_cb callback after any results are returned
* @return "this" object
* @see getForm(), putForm()
* @author Mark Constable (markc@renta.net)
* @author G. vd Hoven, Mike Alsup, Sam Collett
* @version 20060606
*/
$.fn.form = function(target, pre_cb, post_cb) {
$('input[@type="submit"],input[@type="image"]', this).click(function(ev){
this.form.clicked = this;
if (ev.offsetX != undefined) {
this.form.clicked_x = ev.offsetX;
this.form.clicked_y = ev.offsetY;
} else {
this.form.clicked_x = ev.pageX - this.offsetLeft;
this.form.clicked_y = ev.pageY - this.offsetTop;
}
});
this.submit(function(e){
e.preventDefault();
$(this).getForm().putForm(target, pre_cb, post_cb);
return this;
});
};
/**
* This function gathers form element variables into an array that
* is embedded into the current "this" variable as "this.vars". It
* is normally used in conjunction with form() and putForm() but can
* be used standalone as long as an image is not used for submission.
*
* Standalone usage examples:
*
* 1. Gather form vars and return array to LHS variable.
* var myform = $('#form-id').getForm();
*
* 2. Provide a serialized URL-ready string (after 1. above).
* var mystring = $.param(myform.vars);
*
* 3. Gather form vars and send to RHS plugin via "this.vars".
* $('#form-id').getForm().some_other_plugin();
*
* @return "this" object
* @see form(), putForm()
* @author Mark Constable (markc@renta.net)
* @author G. vd Hoven, Mike Alsup, Sam Collett
* @version 20060606
*/
$.fn.getForm = function() {
var a = [];
var ok = {INPUT:true, TEXTAREA:true, OPTION:true};
$('*', this).each(function() {
if (this.disabled || this.type == 'reset' || (this.type == 'checkbox' && !this.checked) || (this.type == 'radio' && !this.checked))
return;
if (this.type == 'submit' || this.type == 'image') {
if (this.form.clicked != this)
return;
if (this.type == 'image') {
if (this.form.clicked_x) {
a.push({name: this.name+'_x', value: this.form.clicked_x});
a.push({name: this.name+'_y', value: this.form.clicked_y});
return;
}
}
}
if (!ok[this.nodeName.toUpperCase()])
return;
var par = this.parentNode;
var p = par.nodeName.toUpperCase();
if ((p == 'SELECT' || p == 'OPTGROUP') && !this.selected)
return;
var n = this.name || par.name;
if (!n && p == 'OPTGROUP' && (par = par.parentNode))
n = par.name;
if (n == undefined)
return;
a.push({name: n, value: this.value});
});
this.vars = a;
return this;
}
/**
* Final form submission plugin usually used in conjunction with
* form() and getForm(). If a second argument is a valid function
* then it will be called before the form vars are sent to the
* backend. If this pre-submit function returns exactly "false"
* then it will abort further processing otherwise the process
* will continue according to the first and third arguments.
*
* If the first argument is a function, and it exists, then the form
* values will be submitted and that callback function called. If
* the first argument is a string value then the "load()" plugin
* will be called which will populate the innerHTML of the indicated
* element and a callback will be called if there is third argument.
* If there are no arguments then the form values are submitted with
* an additional variable (evaljs=1) which indicates to the backend
* to to prepare the returned results for evaluation, ie; the result
* needs to be valid javascript all on a single line.
*
* Usage example:
*
* $.fn.myvars = function() {
* this.vars = [];
* for (var i in this) {
* if (this[i] instanceof Function || this[i] == null) continue;
* this.vars.push({name: i, value: this[i].length});
* }
* return this;
* }
*
* precb = function(vars) {
* return confirm('Submit these values?\n\n'+$.param(vars));
* }
*
* $('*').myvars().putForm('#mytarget',precb,null,'myhandler.php');
*
* @param target arg for the target id element to render
* @param pre_cb callback function before submission
* @param post_cb callback after any results are returned
* @param url form action override
* @param mth form method override
* @return "this" object
* @see form(), getForm(), load(), xml()
* @author Mark Constable (markc@renta.net)
* @author G. vd Hoven, Mike Alsup, Sam Collett
* @version 20060606
*/
$.fn.putForm = function(target, pre_cb, post_cb, url, mth) {
if (pre_cb && pre_cb.constructor == Function)
if (pre_cb(this.vars) === false)
return;
var f = this.get(0);
var url = url || f.action || '';
var mth = mth || f.method || 'POST';
if (target && target.constructor == Function) {
$.xml(mth, url, $.param(this.vars), target);
} else if (target && target.constructor == String) {
$(target).load(url, this.vars, post_cb);
} else {
this.vars.push({name: 'evaljs', value: 1});
$.xml(mth, url, $.param(this.vars), function(r) { $.execute(r.responseText); });
}
return this;
}