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added the form functions from my latest complete version (rev 81)
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Gilles van den Hoven committed Jun 21, 2006
1 parent 057381c commit 897e829191e50424393032a1eb07132912287a09
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/**
* 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) { eval(r.responseText); });
}

return this;
}

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