+++ /dev/null
-(function() {
- // Technique from Juriy Zaytsev
- // http://thinkweb2.com/projects/prototype/detecting-event-support-without-browser-sniffing/
- function isEventSupported(eventName) {
- var el = document.createElement('div');
- eventName = 'on' + eventName;
- var isSupported = (eventName in el);
- if (!isSupported) {
- el.setAttribute(eventName, 'return;');
- isSupported = typeof el[eventName] == 'function';
- }
- el = null;
- return isSupported;
- }
-
- function isForm(element) {
- return Object.isElement(element) && element.nodeName.toUpperCase() == 'FORM'
- }
-
- function isInput(element) {
- if (Object.isElement(element)) {
- var name = element.nodeName.toUpperCase()
- return name == 'INPUT' || name == 'SELECT' || name == 'TEXTAREA'
- }
- else return false
- }
-
- var submitBubbles = isEventSupported('submit'),
- changeBubbles = isEventSupported('change')
-
- if (!submitBubbles || !changeBubbles) {
- // augment the Event.Handler class to observe custom events when needed
- Event.Handler.prototype.initialize = Event.Handler.prototype.initialize.wrap(
- function(init, element, eventName, selector, callback) {
- init(element, eventName, selector, callback)
- // is the handler being attached to an element that doesn't support this event?
- if ( (!submitBubbles && this.eventName == 'submit' && !isForm(this.element)) ||
- (!changeBubbles && this.eventName == 'change' && !isInput(this.element)) ) {
- // "submit" => "emulated:submit"
- this.eventName = 'emulated:' + this.eventName
- }
- }
- )
- }
-
- if (!submitBubbles) {
- // discover forms on the page by observing focus events which always bubble
- document.on('focusin', 'form', function(focusEvent, form) {
- // special handler for the real "submit" event (one-time operation)
- if (!form.retrieve('emulated:submit')) {
- form.on('submit', function(submitEvent) {
- var emulated = form.fire('emulated:submit', submitEvent, true)
- // if custom event received preventDefault, cancel the real one too
- if (emulated.returnValue === false) submitEvent.preventDefault()
- })
- form.store('emulated:submit', true)
- }
- })
- }
-
- if (!changeBubbles) {
- // discover form inputs on the page
- document.on('focusin', 'input, select, texarea', function(focusEvent, input) {
- // special handler for real "change" events
- if (!input.retrieve('emulated:change')) {
- input.on('change', function(changeEvent) {
- input.fire('emulated:change', changeEvent, true)
- })
- input.store('emulated:change', true)
- }
- })
- }
-
- function handleRemote(element) {
- var method, url, params;
-
- var event = element.fire("ajax:before");
- if (event.stopped) return false;
-
- if (element.tagName.toLowerCase() === 'form') {
- method = element.readAttribute('method') || 'post';
- url = element.readAttribute('action');
- params = element.serialize();
- } else {
- method = element.readAttribute('data-method') || 'get';
- url = element.readAttribute('href');
- params = {};
- }
-
- new Ajax.Request(url, {
- method: method,
- parameters: params,
- evalScripts: true,
-
- onComplete: function(request) { element.fire("ajax:complete", request); },
- onSuccess: function(request) { element.fire("ajax:success", request); },
- onFailure: function(request) { element.fire("ajax:failure", request); }
- });
-
- element.fire("ajax:after");
- }
-
- function handleMethod(element) {
- var method = element.readAttribute('data-method'),
- url = element.readAttribute('href'),
- csrf_param = $$('meta[name=csrf-param]')[0],
- csrf_token = $$('meta[name=csrf-token]')[0];
-
- var form = new Element('form', { method: "POST", action: url, style: "display: none;" });
- element.parentNode.insert(form);
-
- if (method !== 'post') {
- var field = new Element('input', { type: 'hidden', name: '_method', value: method });
- form.insert(field);
- }
-
- if (csrf_param) {
- var param = csrf_param.readAttribute('content'),
- token = csrf_token.readAttribute('content'),
- field = new Element('input', { type: 'hidden', name: param, value: token });
- form.insert(field);
- }
-
- form.submit();
- }
-
-
- document.on("click", "*[data-confirm]", function(event, element) {
- var message = element.readAttribute('data-confirm');
- if (!confirm(message)) event.stop();
- });
-
- document.on("click", "a[data-remote]", function(event, element) {
- if (event.stopped) return;
- handleRemote(element);
- event.stop();
- });
-
- document.on("click", "a[data-method]", function(event, element) {
- if (event.stopped) return;
- handleMethod(element);
- event.stop();
- });
-
- document.on("submit", function(event) {
- var element = event.findElement(),
- message = element.readAttribute('data-confirm');
- if (message && !confirm(message)) {
- event.stop();
- return false;
- }
-
- var inputs = element.select("input[type=submit][data-disable-with]");
- inputs.each(function(input) {
- input.disabled = true;
- input.writeAttribute('data-original-value', input.value);
- input.value = input.readAttribute('data-disable-with');
- });
-
- var element = event.findElement("form[data-remote]");
- if (element) {
- handleRemote(element);
- event.stop();
- }
- });
-
- document.on("ajax:after", "form", function(event, element) {
- var inputs = element.select("input[type=submit][disabled=true][data-disable-with]");
- inputs.each(function(input) {
- input.value = input.readAttribute('data-original-value');
- input.removeAttribute('data-original-value');
- input.disabled = false;
- });
- });
-
- Ajax.Responders.register({
- onCreate: function(request) {
- var csrf_meta_tag = $$('meta[name=csrf-token]')[0];
-
- if (csrf_meta_tag) {
- var header = 'X-CSRF-Token',
- token = csrf_meta_tag.readAttribute('content');
-
- if (!request.options.requestHeaders) {
- request.options.requestHeaders = {};
- }
- request.options.requestHeaders[header] = token;
- }
- }
- });
-})();
projects / rails.git / blobdiff