Form.js
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上传日期:2019-12-08
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文件大小:23k
- /*
- * jQuery Form Plugin
- * version: 2.28 (10-MAY-2009)
- * @requires jQuery v1.2.2 or later
- *
- * Examples and documentation at: http://malsup.com/jquery/form/
- * Dual licensed under the MIT and GPL licenses:
- * http://www.opensource.org/licenses/mit-license.php
- * http://www.gnu.org/licenses/gpl.html
- */
- ;(function($) {
- /*
- Usage Note:
- -----------
- Do not use both ajaxSubmit and ajaxForm on the same form. These
- functions are intended to be exclusive. Use ajaxSubmit if you want
- to bind your own submit handler to the form. For example,
- $(document).ready(function() {
- $('#myForm').bind('submit', function() {
- $(this).ajaxSubmit({
- target: '#output'
- });
- return false; // <-- important!
- });
- });
- Use ajaxForm when you want the plugin to manage all the event binding
- for you. For example,
- $(document).ready(function() {
- $('#myForm').ajaxForm({
- target: '#output'
- });
- });
- When using ajaxForm, the ajaxSubmit function will be invoked for you
- at the appropriate time.
- */
- /**
- * ajaxSubmit() provides a mechanism for immediately submitting
- * an HTML form using AJAX.
- */
- $.fn.ajaxSubmit = function(options) {
- // fast fail if nothing selected (http://dev.jquery.com/ticket/2752)
- if (!this.length) {
- log('ajaxSubmit: skipping submit process - no element selected');
- return this;
- }
- if (typeof options == 'function')
- options = { success: options };
- var url = $.trim(this.attr('action'));
- if (url) {
- // clean url (don't include hash vaue)
- url = (url.match(/^([^#]+)/)||[])[1];
- }
- url = url || window.location.href || ''
- options = $.extend({
- url: url,
- type: this.attr('method') || 'GET'
- }, options || {});
- // hook for manipulating the form data before it is extracted;
- // convenient for use with rich editors like tinyMCE or FCKEditor
- var veto = {};
- this.trigger('form-pre-serialize', [this, options, veto]);
- if (veto.veto) {
- log('ajaxSubmit: submit vetoed via form-pre-serialize trigger');
- return this;
- }
- // provide opportunity to alter form data before it is serialized
- if (options.beforeSerialize && options.beforeSerialize(this, options) === false) {
- log('ajaxSubmit: submit aborted via beforeSerialize callback');
- return this;
- }
- var a = this.formToArray(options.semantic);
- if (options.data) {
- options.extraData = options.data;
- for (var n in options.data) {
- if(options.data[n] instanceof Array) {
- for (var k in options.data[n])
- a.push( { name: n, value: options.data[n][k] } );
- }
- else
- a.push( { name: n, value: options.data[n] } );
- }
- }
- // give pre-submit callback an opportunity to abort the submit
- if (options.beforeSubmit && options.beforeSubmit(a, this, options) === false) {
- log('ajaxSubmit: submit aborted via beforeSubmit callback');
- return this;
- }
- // fire vetoable 'validate' event
- this.trigger('form-submit-validate', [a, this, options, veto]);
- if (veto.veto) {
- log('ajaxSubmit: submit vetoed via form-submit-validate trigger');
- return this;
- }
- var q = $.param(a);
- if (options.type.toUpperCase() == 'GET') {
- options.url += (options.url.indexOf('?') >= 0 ? '&' : '?') + q;
- options.data = null; // data is null for 'get'
- }
- else
- options.data = q; // data is the query string for 'post'
- var $form = this, callbacks = [];
- if (options.resetForm) callbacks.push(function() { $form.resetForm(); });
- if (options.clearForm) callbacks.push(function() { $form.clearForm(); });
- // perform a load on the target only if dataType is not provided
- if (!options.dataType && options.target) {
- var oldSuccess = options.success || function(){};
- callbacks.push(function(data) {
- $(options.target).html(data).each(oldSuccess, arguments);
- });
- }
- else if (options.success)
- callbacks.push(options.success);
- options.success = function(data, status) {
- for (var i=0, max=callbacks.length; i < max; i++)
- callbacks[i].apply(options, [data, status, $form]);
- };
- // are there files to upload?
- var files = $('input:file', this).fieldValue();
- var found = false;
- for (var j=0; j < files.length; j++)
- if (files[j])
- found = true;
- var multipart = false;
- // var mp = 'multipart/form-data';
- // multipart = ($form.attr('enctype') == mp || $form.attr('encoding') == mp);
- // options.iframe allows user to force iframe mode
- if (options.iframe || found || multipart) {
- // hack to fix Safari hang (thanks to Tim Molendijk for this)
- // see: http://groups.google.com/group/jquery-dev/browse_thread/thread/36395b7ab510dd5d
- if (options.closeKeepAlive)
- $.get(options.closeKeepAlive, fileUpload);
- else
- fileUpload();
- }
- else
- $.ajax(options);
- // fire 'notify' event
- this.trigger('form-submit-notify', [this, options]);
- return this;
- // private function for handling file uploads (hat tip to YAHOO!)
- function fileUpload() {
- var form = $form[0];
- if ($(':input[name=submit]', form).length) {
- alert('Error: Form elements must not be named "submit".');
- return;
- }
- var opts = $.extend({}, $.ajaxSettings, options);
- var s = $.extend(true, {}, $.extend(true, {}, $.ajaxSettings), opts);
- var id = 'jqFormIO' + (new Date().getTime());
- var $io = $('<iframe id="' + id + '" name="' + id + '" src="about:blank" />');
- var io = $io[0];
- $io.css({ position: 'absolute', top: '-1000px', left: '-1000px' });
- var xhr = { // mock object
- aborted: 0,
- responseText: null,
- responseXML: null,
- status: 0,
- statusText: 'n/a',
- getAllResponseHeaders: function() {},
- getResponseHeader: function() {},
- setRequestHeader: function() {},
- abort: function() {
- this.aborted = 1;
- $io.attr('src','about:blank'); // abort op in progress
- }
- };
- var g = opts.global;
- // trigger ajax global events so that activity/block indicators work like normal
- if (g && ! $.active++) $.event.trigger("ajaxStart");
- if (g) $.event.trigger("ajaxSend", [xhr, opts]);
- if (s.beforeSend && s.beforeSend(xhr, s) === false) {
- s.global && $.active--;
- return;
- }
- if (xhr.aborted)
- return;
- var cbInvoked = 0;
- var timedOut = 0;
- // add submitting element to data if we know it
- var sub = form.clk;
- if (sub) {
- var n = sub.name;
- if (n && !sub.disabled) {
- options.extraData = options.extraData || {};
- options.extraData[n] = sub.value;
- if (sub.type == "image") {
- options.extraData[name+'.x'] = form.clk_x;
- options.extraData[name+'.y'] = form.clk_y;
- }
- }
- }
- // take a breath so that pending repaints get some cpu time before the upload starts
- setTimeout(function() {
- // make sure form attrs are set
- var t = $form.attr('target'), a = $form.attr('action');
- // update form attrs in IE friendly way
- form.setAttribute('target',id);
- if (form.getAttribute('method') != 'POST')
- form.setAttribute('method', 'POST');
- if (form.getAttribute('action') != opts.url)
- form.setAttribute('action', opts.url);
- // ie borks in some cases when setting encoding
- if (! options.skipEncodingOverride) {
- $form.attr({
- encoding: 'multipart/form-data',
- enctype: 'multipart/form-data'
- });
- }
- // support timout
- if (opts.timeout)
- setTimeout(function() { timedOut = true; cb(); }, opts.timeout);
- // add "extra" data to form if provided in options
- var extraInputs = [];
- try {
- if (options.extraData)
- for (var n in options.extraData)
- extraInputs.push(
- $('<input type="hidden" name="'+n+'" value="'+options.extraData[n]+'" />')
- .appendTo(form)[0]);
- // add iframe to doc and submit the form
- $io.appendTo('body');
- io.attachEvent ? io.attachEvent('onload', cb) : io.addEventListener('load', cb, false);
- form.submit();
- }
- finally {
- // reset attrs and remove "extra" input elements
- form.setAttribute('action',a);
- t ? form.setAttribute('target', t) : $form.removeAttr('target');
- $(extraInputs).remove();
- }
- }, 10);
- var nullCheckFlag = 0;
- function cb() {
- if (cbInvoked++) return;
- io.detachEvent ? io.detachEvent('onload', cb) : io.removeEventListener('load', cb, false);
- var ok = true;
- try {
- if (timedOut) throw 'timeout';
- // extract the server response from the iframe
- var data, doc;
- doc = io.contentWindow ? io.contentWindow.document : io.contentDocument ? io.contentDocument : io.document;
- if ((doc.body == null || doc.body.innerHTML == '') && !nullCheckFlag) {
- // in some browsers (cough, Opera 9.2.x) the iframe DOM is not always traversable when
- // the onload callback fires, so we give them a 2nd chance
- nullCheckFlag = 1;
- cbInvoked--;
- setTimeout(cb, 100);
- return;
- }
- xhr.responseText = doc.body ? doc.body.innerHTML : null;
- xhr.responseXML = doc.XMLDocument ? doc.XMLDocument : doc;
- xhr.getResponseHeader = function(header){
- var headers = {'content-type': opts.dataType};
- return headers[header];
- };
- if (opts.dataType == 'json' || opts.dataType == 'script') {
- var ta = doc.getElementsByTagName('textarea')[0];
- xhr.responseText = ta ? ta.value : xhr.responseText;
- }
- else if (opts.dataType == 'xml' && !xhr.responseXML && xhr.responseText != null) {
- xhr.responseXML = toXml(xhr.responseText);
- }
- data = $.httpData(xhr, opts.dataType);
- }
- catch(e){
- ok = false;
- $.handleError(opts, xhr, 'error', e);
- }
- // ordering of these callbacks/triggers is odd, but that's how $.ajax does it
- if (ok) {
- opts.success(data, 'success');
- if (g) $.event.trigger("ajaxSuccess", [xhr, opts]);
- }
- if (g) $.event.trigger("ajaxComplete", [xhr, opts]);
- if (g && ! --$.active) $.event.trigger("ajaxStop");
- if (opts.complete) opts.complete(xhr, ok ? 'success' : 'error');
- // clean up
- setTimeout(function() {
- $io.remove();
- xhr.responseXML = null;
- }, 100);
- };
- function toXml(s, doc) {
- if (window.ActiveXObject) {
- doc = new ActiveXObject('Microsoft.XMLDOM');
- doc.async = 'false';
- doc.loadXML(s);
- }
- else
- doc = (new DOMParser()).parseFromString(s, 'text/xml');
- return (doc && doc.documentElement && doc.documentElement.tagName != 'parsererror') ? doc : null;
- };
- };
- };
- /**
- * ajaxForm() provides a mechanism for fully automating form submission.
- *
- * The advantages of using this method instead of ajaxSubmit() are:
- *
- * 1: This method will include coordinates for <input type="image" /> elements (if the element
- * is used to submit the form).
- * 2. This method will include the submit element's name/value data (for the element that was
- * used to submit the form).
- * 3. This method binds the submit() method to the form for you.
- *
- * The options argument for ajaxForm works exactly as it does for ajaxSubmit. ajaxForm merely
- * passes the options argument along after properly binding events for submit elements and
- * the form itself.
- */
- $.fn.ajaxForm = function(options) {
- return this.ajaxFormUnbind().bind('submit.form-plugin',function() {
- $(this).ajaxSubmit(options);
- return false;
- }).each(function() {
- // store options in hash
- $(":submit,input:image", this).bind('click.form-plugin',function(e) {
- var form = this.form;
- form.clk = this;
- if (this.type == 'image') {
- if (e.offsetX != undefined) {
- form.clk_x = e.offsetX;
- form.clk_y = e.offsetY;
- } else if (typeof $.fn.offset == 'function') { // try to use dimensions plugin
- var offset = $(this).offset();
- form.clk_x = e.pageX - offset.left;
- form.clk_y = e.pageY - offset.top;
- } else {
- form.clk_x = e.pageX - this.offsetLeft;
- form.clk_y = e.pageY - this.offsetTop;
- }
- }
- // clear form vars
- setTimeout(function() { form.clk = form.clk_x = form.clk_y = null; }, 10);
- });
- });
- };
- // ajaxFormUnbind unbinds the event handlers that were bound by ajaxForm
- $.fn.ajaxFormUnbind = function() {
- this.unbind('submit.form-plugin');
- return this.each(function() {
- $(":submit,input:image", this).unbind('click.form-plugin');
- });
- };
- /**
- * formToArray() gathers form element data into an array of objects that can
- * be passed to any of the following ajax functions: $.get, $.post, or load.
- * Each object in the array has both a 'name' and 'value' property. An example of
- * an array for a simple login form might be:
- *
- * [ { name: 'username', value: 'jresig' }, { name: 'password', value: 'secret' } ]
- *
- * It is this array that is passed to pre-submit callback functions provided to the
- * ajaxSubmit() and ajaxForm() methods.
- */
- $.fn.formToArray = function(semantic) {
- var a = [];
- if (this.length == 0) return a;
- var form = this[0];
- var els = semantic ? form.getElementsByTagName('*') : form.elements;
- if (!els) return a;
- for(var i=0, max=els.length; i < max; i++) {
- var el = els[i];
- var n = el.name;
- if (!n) continue;
- if (semantic && form.clk && el.type == "image") {
- // handle image inputs on the fly when semantic == true
- if(!el.disabled && form.clk == el) {
- a.push({name: n, value: $(el).val()});
- a.push({name: n+'.x', value: form.clk_x}, {name: n+'.y', value: form.clk_y});
- }
- continue;
- }
- var v = $.fieldValue(el, true);
- if (v && v.constructor == Array) {
- for(var j=0, jmax=v.length; j < jmax; j++)
- a.push({name: n, value: v[j]});
- }
- else if (v !== null && typeof v != 'undefined')
- a.push({name: n, value: v});
- }
- if (!semantic && form.clk) {
- // input type=='image' are not found in elements array! handle it here
- var $input = $(form.clk), input = $input[0], n = input.name;
- if (n && !input.disabled && input.type == 'image') {
- a.push({name: n, value: $input.val()});
- a.push({name: n+'.x', value: form.clk_x}, {name: n+'.y', value: form.clk_y});
- }
- }
- return a;
- };
- /**
- * Serializes form data into a 'submittable' string. This method will return a string
- * in the format: name1=value1&name2=value2
- */
- $.fn.formSerialize = function(semantic) {
- //hand off to jQuery.param for proper encoding
- return $.param(this.formToArray(semantic));
- };
- /**
- * Serializes all field elements in the jQuery object into a query string.
- * This method will return a string in the format: name1=value1&name2=value2
- */
- $.fn.fieldSerialize = function(successful) {
- var a = [];
- this.each(function() {
- var n = this.name;
- if (!n) return;
- var v = $.fieldValue(this, successful);
- if (v && v.constructor == Array) {
- for (var i=0,max=v.length; i < max; i++)
- a.push({name: n, value: v[i]});
- }
- else if (v !== null && typeof v != 'undefined')
- a.push({name: this.name, value: v});
- });
- //hand off to jQuery.param for proper encoding
- return $.param(a);
- };
- /**
- * Returns the value(s) of the element in the matched set. For example, consider the following form:
- *
- * <form><fieldset>
- * <input name="A" type="text" />
- * <input name="A" type="text" />
- * <input name="B" type="checkbox" value="B1" />
- * <input name="B" type="checkbox" value="B2"/>
- * <input name="C" type="radio" value="C1" />
- * <input name="C" type="radio" value="C2" />
- * </fieldset></form>
- *
- * var v = $(':text').fieldValue();
- * // if no values are entered into the text inputs
- * v == ['','']
- * // if values entered into the text inputs are 'foo' and 'bar'
- * v == ['foo','bar']
- *
- * var v = $(':checkbox').fieldValue();
- * // if neither checkbox is checked
- * v === undefined
- * // if both checkboxes are checked
- * v == ['B1', 'B2']
- *
- * var v = $(':radio').fieldValue();
- * // if neither radio is checked
- * v === undefined
- * // if first radio is checked
- * v == ['C1']
- *
- * The successful argument controls whether or not the field element must be 'successful'
- * (per http://www.w3.org/TR/html4/interact/forms.html#successful-controls).
- * The default value of the successful argument is true. If this value is false the value(s)
- * for each element is returned.
- *
- * Note: This method *always* returns an array. If no valid value can be determined the
- * array will be empty, otherwise it will contain one or more values.
- */
- $.fn.fieldValue = function(successful) {
- for (var val=[], i=0, max=this.length; i < max; i++) {
- var el = this[i];
- var v = $.fieldValue(el, successful);
- if (v === null || typeof v == 'undefined' || (v.constructor == Array && !v.length))
- continue;
- v.constructor == Array ? $.merge(val, v) : val.push(v);
- }
- return val;
- };
- /**
- * Returns the value of the field element.
- */
- $.fieldValue = function(el, successful) {
- var n = el.name, t = el.type, tag = el.tagName.toLowerCase();
- if (typeof successful == 'undefined') successful = true;
- if (successful && (!n || el.disabled || t == 'reset' || t == 'button' ||
- (t == 'checkbox' || t == 'radio') && !el.checked ||
- (t == 'submit' || t == 'image') && el.form && el.form.clk != el ||
- tag == 'select' && el.selectedIndex == -1))
- return null;
- if (tag == 'select') {
- var index = el.selectedIndex;
- if (index < 0) return null;
- var a = [], ops = el.options;
- var one = (t == 'select-one');
- var max = (one ? index+1 : ops.length);
- for(var i=(one ? index : 0); i < max; i++) {
- var op = ops[i];
- if (op.selected) {
- var v = op.value;
- if (!v) // extra pain for IE...
- v = (op.attributes && op.attributes['value'] && !(op.attributes['value'].specified)) ? op.text : op.value;
- if (one) return v;
- a.push(v);
- }
- }
- return a;
- }
- return el.value;
- };
- /**
- * Clears the form data. Takes the following actions on the form's input fields:
- * - input text fields will have their 'value' property set to the empty string
- * - select elements will have their 'selectedIndex' property set to -1
- * - checkbox and radio inputs will have their 'checked' property set to false
- * - inputs of type submit, button, reset, and hidden will *not* be effected
- * - button elements will *not* be effected
- */
- $.fn.clearForm = function() {
- return this.each(function() {
- $('input,select,textarea', this).clearFields();
- });
- };
- /**
- * Clears the selected form elements.
- */
- $.fn.clearFields = $.fn.clearInputs = function() {
- return this.each(function() {
- var t = this.type, tag = this.tagName.toLowerCase();
- if (t == 'text' || t == 'password' || tag == 'textarea')
- this.value = '';
- else if (t == 'checkbox' || t == 'radio')
- this.checked = false;
- else if (tag == 'select')
- this.selectedIndex = -1;
- });
- };
- /**
- * Resets the form data. Causes all form elements to be reset to their original value.
- */
- $.fn.resetForm = function() {
- return this.each(function() {
- // guard against an input with the name of 'reset'
- // note that IE reports the reset function as an 'object'
- if (typeof this.reset == 'function' || (typeof this.reset == 'object' && !this.reset.nodeType))
- this.reset();
- });
- };
- /**
- * Enables or disables any matching elements.
- */
- $.fn.enable = function(b) {
- if (b == undefined) b = true;
- return this.each(function() {
- this.disabled = !b;
- });
- };
- /**
- * Checks/unchecks any matching checkboxes or radio buttons and
- * selects/deselects and matching option elements.
- */
- $.fn.selected = function(select) {
- if (select == undefined) select = true;
- return this.each(function() {
- var t = this.type;
- if (t == 'checkbox' || t == 'radio')
- this.checked = select;
- else if (this.tagName.toLowerCase() == 'option') {
- var $sel = $(this).parent('select');
- if (select && $sel[0] && $sel[0].type == 'select-one') {
- // deselect all other options
- $sel.find('option').selected(false);
- }
- this.selected = select;
- }
- });
- };
- // helper fn for console logging
- // set $.fn.ajaxSubmit.debug to true to enable debug logging
- function log() {
- if ($.fn.ajaxSubmit.debug && window.console && window.console.log)
- window.console.log('[jquery.form] ' + Array.prototype.join.call(arguments,''));
- };
- })(jQuery);