Did a lot of work on the form plugin. Re-worked the function names, documentation, fixed some bugs - generally made things much more explicit and easier to understand.
This commit is contained in:
John Resig
parent
5f8576d3a3
commit
ce6af8e889
337
form/form.js
337
form/form.js
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@ -1,176 +1,51 @@
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/**
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* Initial frontend function to submit form variables. This function
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* is for registering coordinates, in the case of an image being used
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* as the submit element, and sets up an event to listen and wait for
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* a form submit click. It then calls any following chained functions
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* to actually gather the variables and submit them.
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* A method for submitting an HTML form using AJAX, as opposed to the
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* standard page-load way.
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*
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* Usage examples, when used with getForm().putForm():
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* This method attempts to mimic the functionality of the original form
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* as best as possible (duplicating the method, action, and exact contents
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* of the form).
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*
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* 1. Just eval the results returned from the backend.
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* $('#form-id').form();
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* There are three different resulting operations that can occur, after
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* your form has been submitted.
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*
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* 2. Render backend results directly to target ID (expects (x)HTML).
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* $('#form-id').form('#target-id');
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* 1. The form is submitted and a callback is fired, letting you know
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* when it's done:
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* $("form").ajaxSubmit(function(){
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* alert("all done!");
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* });
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*
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* 3. Submit to backend URL (form action) then call this function.
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* $('#form-id').form(post_callback);
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* 2. The form is submitted and the resulting HTML contents are injected
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* into the page, at your specified location.
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* $("form").ajaxSubmit("#destination");
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*
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* 4. Load target ID with backend results then call a function.
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* $('#form-id').form('#target-id', null, post_callback);
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* 3. The form is submitted and the results returned from the server are
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* automatically executed (useful for having the server return more
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* Javascript commands to execute).
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* $("form").ajaxSubmit();
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*
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* 5. Call a browser function (for validation) and then (optionally)
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* load server results to target ID.
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* $('#form-id').form('#target-id', pre_callback);
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* Additionally, an optional pre-submit callback can be provided. If it,
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* when called with the contents of the form, returns false, the form will
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* not be submitted.
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*
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* 6. Call validation function first then load server results to
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* target ID and then also call a browser function.
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* $('#form-id').form('#target-id', pre_callback, post_callback);
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* Finally, both the URL and method of the form submission can be
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* overidden using the 'url' and 'mth' arguments.
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*
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* @param target arg for the target id element to render
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* @param pre_cb callback function before submission
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* @param post_cb callback after any results are returned
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* @return "this" object
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* @see getForm(), putForm()
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* @author Mark Constable (markc@renta.net)
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* @author G. vd Hoven, Mike Alsup, Sam Collett
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* @version 20060606
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*/
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$.fn.form = function(target, pre_cb, post_cb) {
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$('input[@type="submit"],input[@type="image"]', this).click(function(ev){
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this.form.clicked = this;
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if (ev.offsetX != undefined) {
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this.form.clicked_x = ev.offsetX;
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this.form.clicked_y = ev.offsetY;
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} else {
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this.form.clicked_x = ev.pageX - this.offsetLeft;
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this.form.clicked_y = ev.pageY - this.offsetTop;
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}
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});
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this.submit(function(e){
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e.preventDefault();
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$(this).getForm().putForm(target, pre_cb, post_cb);
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return this;
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});
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};
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/**
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* This function gathers form element variables into an array that
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* is embedded into the current "this" variable as "this.vars". It
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* is normally used in conjunction with form() and putForm() but can
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* be used standalone as long as an image is not used for submission.
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*
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* Standalone usage examples:
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*
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* 1. Gather form vars and return array to LHS variable.
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* var myform = $('#form-id').getForm();
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*
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* 2. Provide a serialized URL-ready string (after 1. above).
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* var mystring = $.param(myform.vars);
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*
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* 3. Gather form vars and send to RHS plugin via "this.vars".
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* $('#form-id').getForm().some_other_plugin();
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*
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* @return "this" object
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* @see form(), putForm()
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* @author Mark Constable (markc@renta.net)
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* @author G. vd Hoven, Mike Alsup, Sam Collett
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* @version 20060606
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*/
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$.fn.getForm = function() {
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var a = [];
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var ok = {INPUT:true, TEXTAREA:true, OPTION:true};
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$('*', this).each(function() {
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if (this.disabled || this.type == 'reset' || (this.type == 'checkbox' && !this.checked) || (this.type == 'radio' && !this.checked))
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return;
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if (this.type == 'submit' || this.type == 'image') {
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if (this.form.clicked != this)
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return;
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if (this.type == 'image') {
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if (this.form.clicked_x) {
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a.push({name: this.name+'_x', value: this.form.clicked_x});
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a.push({name: this.name+'_y', value: this.form.clicked_y});
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return;
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}
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}
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}
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if (!ok[this.nodeName.toUpperCase()])
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return;
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var par = this.parentNode;
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var p = par.nodeName.toUpperCase();
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if ((p == 'SELECT' || p == 'OPTGROUP') && !this.selected)
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return;
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var n = this.name || par.name;
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if (!n && p == 'OPTGROUP' && (par = par.parentNode))
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n = par.name;
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if (n == undefined)
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return;
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a.push({name: n, value: this.value});
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});
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this.vars = a;
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return this;
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}
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/**
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* Final form submission plugin usually used in conjunction with
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* form() and getForm(). If a second argument is a valid function
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* then it will be called before the form vars are sent to the
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* backend. If this pre-submit function returns exactly "false"
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* then it will abort further processing otherwise the process
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* will continue according to the first and third arguments.
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*
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* If the first argument is a function, and it exists, then the form
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* values will be submitted and that callback function called. If
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* the first argument is a string value then the "load()" plugin
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* will be called which will populate the innerHTML of the indicated
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* element and a callback will be called if there is third argument.
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* If there are no arguments then the form values are submitted with
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* an additional variable (evaljs=1) which indicates to the backend
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* to to prepare the returned results for evaluation, ie; the result
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* needs to be valid javascript all on a single line.
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*
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* Usage example:
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*
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* $.fn.myvars = function() {
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* this.vars = [];
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* for (var i in this) {
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* if (this[i] instanceof Function || this[i] == null) continue;
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* this.vars.push({name: i, value: this[i].length});
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* }
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* return this;
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* }
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*
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* precb = function(vars) {
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* return confirm('Submit these values?\n\n'+$.param(vars));
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* }
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*
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* $('*').myvars().putForm('#mytarget',precb,null,'myhandler.php');
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*
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* @param target arg for the target id element to render
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* @param pre_cb callback function before submission
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* @param post_cb callback after any results are returned
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* @param url form action override
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* @param mth form method override
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* @return "this" object
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* @see form(), getForm(), load(), xml()
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* @see ajaxForm(), serialize(), load(), $.xml()
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* @author Mark Constable (markc@renta.net)
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* @author G. vd Hoven, Mike Alsup, Sam Collett
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* @version 20060606
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* @author G. vd Hoven, Mike Alsup, Sam Collett, John Resig
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*/
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$.fn.putForm = function(target, pre_cb, post_cb, url, mth) {
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$.fn.ajaxSubmit = function(target, post_cb, pre_cb, url, mth) {
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if ( !this.vars ) this.serialize();
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if (pre_cb && pre_cb.constructor == Function)
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if (pre_cb(this.vars) === false)
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return;
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if (pre_cb(this.vars) === false) return;
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var f = this.get(0);
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var url = url || f.action || '';
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@ -182,8 +57,156 @@ $.fn.putForm = function(target, pre_cb, post_cb, url, mth) {
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$(target).load(url, this.vars, post_cb);
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} else {
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this.vars.push({name: 'evaljs', value: 1});
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$.xml(mth, url, $.param(this.vars), function(r) { eval(r.responseText); });
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$.xml(mth, url, $.param(this.vars), function(r) {
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eval(r.responseText);
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});
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}
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return this;
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}
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};
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/**
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* This function can be used to turn any HTML form into a form
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* that submits using AJAX only.
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*
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* The purpose of using this method, instead of the ajaxSubmit()
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* and submit() methods, is to make absolutely sure that the
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* coordinates of <input type="image"/> elements are transmitted
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* correctly OR figuring out exactly which <input type="submit"/>
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* element was clicked to submit the form.
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*
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* If neither of the above points are important to you, then you'll
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* probably just want to stick with the simpler ajaxSubmit() function.
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*
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* Usage examples, similar to ajaxSubmit():
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*
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* 1. Just eval the results returned from the backend.
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* $('#form-id').ajaxForm();
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*
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* 2. Render backend results directly to target ID (expects (x)HTML).
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* $('#form-id').ajaxForm('#target-id');
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*
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* 3. Submit to backend URL (form action) then call this function.
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* $('#form-id').ajaxForm(post_callback);
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*
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* 4. Load target ID with backend results then call a function.
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* $('#form-id').ajaxForm('#target-id', post_callback);
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*
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* 5. Call a browser function (for validation) and then (optionally)
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* load server results to target ID.
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* $('#form-id').ajaxForm('#target-id', null, pre_callback);
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*
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* 6. Call validation function first then load server results to
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* target ID and then also call a browser function.
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* $('#form-id').ajaxForm('#target-id', post_callback, pre_callback);
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*
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* @param target arg for the target id element to render
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* @param post_cb callback after any results are returned
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* @param pre_cb callback function before submission
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* @return the jQuery Object
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* @see serialize(), ajaxSubmit()
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* @author Mark Constable (markc@renta.net)
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* @author G. vd Hoven, Mike Alsup, Sam Collett, John Resig
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*/
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$.fn.ajaxForm = function(target, post_cb, pre_cb) {
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return this.each(function(){
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$('input[@type="submit"],input[@type="image"]', this).click(function(ev){
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this.form.clicked = this;
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if (ev.offsetX != undefined) {
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this.form.clicked_x = ev.offsetX;
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this.form.clicked_y = ev.offsetY;
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} else {
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this.form.clicked_x = ev.pageX - this.offsetLeft;
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this.form.clicked_y = ev.pageY - this.offsetTop;
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}
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});
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}).submit(function(e){
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e.preventDefault();
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$(this).ajaxSubmit(target, post_cb, pre_cb);
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return false;
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});
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};
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/**
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* A simple wrapper function that sits around the .serialize()
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* method, allowing you to easily extract the data stored within
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* a form.
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*
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* Usage examples:
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*
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* 1. Serialize the contents of a form to a & and = delmited string:
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* $.param( $("form").formdata() );
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*
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* @return An array of name/value pairs representing the form
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* @see serialize()
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# @author John Resig
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*/
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$.fn.formdata = function(){
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this.serialize();
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return this.vars;
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};
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/**
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* This function gathers form element variables into an array that
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* is embedded into the current "this" variable as "this.vars". It
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* is normally used in conjunction with formdata() or ajaxSubmit() but can
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* be used standalone as long as you don't need the x and y coordinates
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* associated with an <input type="image"/> element..
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*
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* Standalone usage examples:
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*
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* 1. Gather form vars and return array to LHS variable.
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* var myform = $('#form-id').serialize();
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*
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* 2. Provide a serialized URL-ready string (after 1. above).
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* var mystring = $.param(myform.vars);
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*
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* 3. Gather form vars and send to RHS plugin via "this.vars".
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* $('#form-id').serialize().some_other_plugin();
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*
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* @return the jQuery Object
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* @see ajaxForm(), ajaxSubmit()
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* @author Mark Constable (markc@renta.net)
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* @author G. vd Hoven, Mike Alsup, Sam Collett, John Resig
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*/
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$.fn.serialize = function() {
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var a = [];
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var ok = {INPUT:true, TEXTAREA:true, OPTION:true};
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$('*', this).each(function() {
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if (this.disabled || this.type == 'reset' ||
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(this.type == 'checkbox' && !this.checked) ||
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(this.type == 'radio' && !this.checked)) return;
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if (this.type == 'submit' || this.type == 'image') {
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if (this.form.clicked != this) return;
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if (this.type == 'image') {
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if (this.form.clicked_x) {
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a.push({name: this.name+'_x', value: this.form.clicked_x});
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a.push({name: this.name+'_y', value: this.form.clicked_y});
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return;
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}
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}
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}
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if (!ok[this.nodeName.toUpperCase()])
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return;
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var par = this.parentNode;
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var p = par.nodeName.toUpperCase();
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if ((p == 'SELECT' || p == 'OPTGROUP') && !this.selected) return;
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var n = this.name || par.name;
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if (!n && p == 'OPTGROUP' && (par = par.parentNode))
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n = par.name;
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if (n == undefined) return;
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a.push({name: n, value: this.value});
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});
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this.vars = a;
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return this;
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};
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