1(function($, undefined) { 2 3/** 4 * Unobtrusive scripting adapter for jQuery 5 * https://github.com/rails/jquery-ujs 6 * 7 * Requires jQuery 1.8.0 or later. 8 * 9 * Released under the MIT license 10 * 11 */ 12 13 // Cut down on the number of issues from people inadvertently including jquery_ujs twice 14 // by detecting and raising an error when it happens. 15 'use strict'; 16 17 if ( $.rails !== undefined ) { 18 $.error('jquery-ujs has already been loaded!'); 19 } 20 21 // Shorthand to make it a little easier to call public rails functions from within rails.js 22 var rails; 23 var $document = $(document); 24 25 $.rails = rails = { 26 // Link elements bound by jquery-ujs 27 linkClickSelector: 'a[data-confirm], a[data-method], a[data-remote]:not([disabled]), a[data-disable-with], a[data-disable]', 28 29 // Button elements bound by jquery-ujs 30 buttonClickSelector: 'button[data-remote]:not([form]):not(form button), button[data-confirm]:not([form]):not(form button)', 31 32 // Select elements bound by jquery-ujs 33 inputChangeSelector: 'select[data-remote], input[data-remote], textarea[data-remote]', 34 35 // Form elements bound by jquery-ujs 36 formSubmitSelector: 'form', 37 38 // Form input elements bound by jquery-ujs 39 formInputClickSelector: 'form input[type=submit], form input[type=image], form button[type=submit], form button:not([type]), input[type=submit][form], input[type=image][form], button[type=submit][form], button[form]:not([type])', 40 41 // Form input elements disabled during form submission 42 disableSelector: 'input[data-disable-with]:enabled, button[data-disable-with]:enabled, textarea[data-disable-with]:enabled, input[data-disable]:enabled, button[data-disable]:enabled, textarea[data-disable]:enabled', 43 44 // Form input elements re-enabled after form submission 45 enableSelector: 'input[data-disable-with]:disabled, button[data-disable-with]:disabled, textarea[data-disable-with]:disabled, input[data-disable]:disabled, button[data-disable]:disabled, textarea[data-disable]:disabled', 46 47 // Form required input elements 48 requiredInputSelector: 'input[name][required]:not([disabled]), textarea[name][required]:not([disabled])', 49 50 // Form file input elements 51 fileInputSelector: 'input[type=file]:not([disabled])', 52 53 // Link onClick disable selector with possible reenable after remote submission 54 linkDisableSelector: 'a[data-disable-with], a[data-disable]', 55 56 // Button onClick disable selector with possible reenable after remote submission 57 buttonDisableSelector: 'button[data-remote][data-disable-with], button[data-remote][data-disable]', 58 59 // Up-to-date Cross-Site Request Forgery token 60 csrfToken: function() { 61 return $('meta[name=csrf-token]').attr('content'); 62 }, 63 64 // URL param that must contain the CSRF token 65 csrfParam: function() { 66 return $('meta[name=csrf-param]').attr('content'); 67 }, 68 69 // Make sure that every Ajax request sends the CSRF token 70 CSRFProtection: function(xhr) { 71 var token = rails.csrfToken(); 72 if (token) xhr.setRequestHeader('X-CSRF-Token', token); 73 }, 74 75 // Make sure that all forms have actual up-to-date tokens (cached forms contain old ones) 76 refreshCSRFTokens: function(){ 77 $('form input[name="' + rails.csrfParam() + '"]').val(rails.csrfToken()); 78 }, 79 80 // Triggers an event on an element and returns false if the event result is false 81 fire: function(obj, name, data) { 82 var event = $.Event(name); 83 obj.trigger(event, data); 84 return event.result !== false; 85 }, 86 87 // Default confirm dialog, may be overridden with custom confirm dialog in $.rails.confirm 88 confirm: function(message) { 89 return confirm(message); 90 }, 91 92 // Default ajax function, may be overridden with custom function in $.rails.ajax 93 ajax: function(options) { 94 return $.ajax(options); 95 }, 96 97 // Default way to get an element's href. May be overridden at $.rails.href. 98 href: function(element) { 99 return element[0].href; 100 }, 101 102 // Checks "data-remote" if true to handle the request through a XHR request. 103 isRemote: function(element) { 104 return element.data('remote') !== undefined && element.data('remote') !== false; 105 }, 106 107 // Submits "remote" forms and links with ajax 108 handleRemote: function(element) { 109 var method, url, data, withCredentials, dataType, options; 110 111 if (rails.fire(element, 'ajax:before')) { 112 withCredentials = element.data('with-credentials') || null; 113 dataType = element.data('type') || ($.ajaxSettings && $.ajaxSettings.dataType); 114 115 if (element.is('form')) { 116 method = element.data('ujs:submit-button-formmethod') || element.attr('method'); 117 url = element.data('ujs:submit-button-formaction') || element.attr('action'); 118 data = $(element[0]).serializeArray(); 119 // memoized value from clicked submit button 120 var button = element.data('ujs:submit-button'); 121 if (button) { 122 data.push(button); 123 element.data('ujs:submit-button', null); 124 } 125 element.data('ujs:submit-button-formmethod', null); 126 element.data('ujs:submit-button-formaction', null); 127 } else if (element.is(rails.inputChangeSelector)) { 128 method = element.data('method'); 129 url = element.data('url'); 130 data = element.serialize(); 131 if (element.data('params')) data = data + '&' + element.data('params'); 132 } else if (element.is(rails.buttonClickSelector)) { 133 method = element.data('method') || 'get'; 134 url = element.data('url'); 135 data = element.serialize(); 136 if (element.data('params')) data = data + '&' + element.data('params'); 137 } else { 138 method = element.data('method'); 139 url = rails.href(element); 140 data = element.data('params') || null; 141 } 142 143 options = { 144 type: method || 'GET', data: data, dataType: dataType, 145 // stopping the "ajax:beforeSend" event will cancel the ajax request 146 beforeSend: function(xhr, settings) { 147 if (settings.dataType === undefined) { 148 xhr.setRequestHeader('accept', '*/*;q=0.5, ' + settings.accepts.script); 149 } 150 if (rails.fire(element, 'ajax:beforeSend', [xhr, settings])) {
151 element.trigger('ajax:send', xhr); 152 } else { 153 return false; 154 } 155 }, 156 success: function(data, status, xhr) { 157 element.trigger('ajax:success', [data, status, xhr]); 158 }, 159 complete: function(xhr, status) { 160 element.trigger('ajax:complete', [xhr, status]); 161 }, 162 error: function(xhr, status, error) { 163 element.trigger('ajax:error', [xhr, status, error]); 164 }, 165 crossDomain: rails.isCrossDomain(url) 166 }; 167 168 // There is no withCredentials for IE6-8 when 169 // "Enable native XMLHTTP support" is disabled 170 if (withCredentials) { 171 options.xhrFields = { 172 withCredentials: withCredentials 173 }; 174 } 175 176 // Only pass url to `ajax` options if not blank 177 if (url) { options.url = url; } 178 179 return rails.ajax(options); 180 } else { 181 return false; 182 } 183 }, 184 185 // Determines if the request is a cross domain request. 186 isCrossDomain: function(url) { 187 var originAnchor = document.createElement('a'); 188 originAnchor.href = location.href; 189 var urlAnchor = document.createElement('a'); 190 191 try { 192 urlAnchor.href = url; 193 // This is a workaround to a IE bug. 194 urlAnchor.href = urlAnchor.href; 195 196 // If URL protocol is false or is a string containing a single colon 197 // *and* host are false, assume it is not a cross-domain request 198 // (should only be the case for IE7 and IE compatibility mode). 199 // Otherwise, evaluate protocol and host of the URL against the origin 200 // protocol and host. 201 return !(((!urlAnchor.protocol || urlAnchor.protocol === ':') && !urlAnchor.host) || 202 (originAnchor.protocol + '//' + originAnchor.host === 203 urlAnchor.protocol + '//' + urlAnchor.host)); 204 } catch (e) { 205 // If there is an error parsing the URL, assume it is crossDomain. 206 return true; 207 } 208 }, 209 210 // Handles "data-method" on links such as: 211 // <a href="/users/5" data-method="delete" rel="nofollow" data-confirm="Are you sure?">Delete</a> 212 handleMethod: function(link) { 213 var href = rails.href(link), 214 method = link.data('method'), 215 target = link.attr('target'), 216 csrfToken = rails.csrfToken(), 217 csrfParam = rails.csrfParam(), 218 form = $('<form method="post" action="' + href + '"></form>'), 219 metadataInput = '<input name="_method" value="' + method + '" type="hidden" />'; 220 221 if (csrfParam !== undefined && csrfToken !== undefined && !rails.isCrossDomain(href)) { 222 metadataInput += '<input name="' + csrfParam + '" value="' + csrfToken + '" type="hidden" />'; 223 } 224 225 if (target) { form.attr('target', target); } 226 227 form.hide().append(metadataInput).appendTo('body'); 228 form.submit(); 229 }, 230 231 // Helper function that returns form elements that match the specified CSS selector 232 // If form is actually a "form" element this will return associated elements outside the from that have 233 // the html form attribute set 234 formElements: function(form, selector) { 235 return form.is('form') ? $(form[0].elements).filter(selector) : form.find(selector); 236 }, 237 238 /* Disables form elements: 239 - Caches element value in 'ujs:enable-with' data store 240 - Replaces element text with value of 'data-disable-with' attribute 241 - Sets disabled property to true 242 */ 243 disableFormElements: function(form) { 244 rails.formElements(form, rails.disableSelector).each(function() { 245 rails.disableFormElement($(this)); 246 }); 247 }, 248 249 disableFormElement: function(element) { 250 var method, replacement; 251 252 method = element.is('button') ? 'html' : 'val'; 253 replacement = element.data('disable-with'); 254 255 if (replacement !== undefined) { 256 element.data('ujs:enable-with', element[method]()); 257 element[method](replacement); 258 } 259 260 element.prop('disabled', true); 261 element.data('ujs:disabled', true); 262 }, 263 264 /* Re-enables disabled form elements: 265 - Replaces element text with cached value from 'ujs:enable-with' data store (created in `disableFormElements`) 266 - Sets disabled property to false 267 */ 268 enableFormElements: function(form) { 269 rails.formElements(form, rails.enableSelector).each(function() { 270 rails.enableFormElement($(this)); 271 }); 272 }, 273 274 enableFormElement: function(element) { 275 var method = element.is('button') ? 'html' : 'val'; 276 if (element.data('ujs:enable-with') !== undefined) { 277 element[method](element.data('ujs:enable-with')); 278 element.removeData('ujs:enable-with'); // clean up cache 279 } 280 element.prop('disabled', false); 281 element.removeData('ujs:disabled'); 282 }, 283 284 /* For 'data-confirm' attribute: 285 - Fires `confirm` event 286 - Shows the confirmation dialog 287 - Fires the `confirm:complete` event 288 289 Returns `true` if no function stops the chain and user chose yes; `false` otherwise. 290 Attaching a handler to the element's `confirm` event that returns a `falsy` value cancels the confirmation dialog. 291 Attaching a handler to the element's `confirm:complete` event that returns a `falsy` value makes this function
292 return false. The `confirm:complete` event is fired whether or not the user answered true or false to the dialog. 293 */ 294 allowAction: function(element) { 295 var message = element.data('confirm'), 296 answer = false, callback; 297 if (!message) { return true; } 298 299 if (rails.fire(element, 'confirm')) { 300 try { 301 answer = rails.confirm(message); 302 } catch (e) { 303 (console.error || console.log).call(console, e.stack || e); 304 } 305 callback = rails.fire(element, 'confirm:complete', [answer]); 306 } 307 return answer && callback; 308 }, 309 310 // Helper function which checks for blank inputs in a form that match the specified CSS selector 311 blankInputs: function(form, specifiedSelector, nonBlank) { 312 var foundInputs = $(), 313 input, 314 valueToCheck, 315 radiosForNameWithNoneSelected, 316 radioName, 317 selector = specifiedSelector || 'input,textarea', 318 requiredInputs = form.find(selector), 319 checkedRadioButtonNames = {}; 320 321 requiredInputs.each(function() { 322 input = $(this); 323 if (input.is('input[type=radio]')) { 324 325 // Don't count unchecked required radio as blank if other radio with same name is checked, 326 // regardless of whether same-name radio input has required attribute or not. The spec 327 // states https://www.w3.org/TR/html5/forms.html#the-required-attribute 328 radioName = input.attr('name'); 329 330 // Skip if we've already seen the radio with this name. 331 if (!checkedRadioButtonNames[radioName]) { 332 333 // If none checked 334 if (form.find('input[type=radio]:checked[name="' + radioName + '"]').length === 0) { 335 radiosForNameWithNoneSelected = form.find( 336 'input[type=radio][name="' + radioName + '"]'); 337 foundInputs = foundInputs.add(radiosForNameWithNoneSelected); 338 } 339 340 // We only need to check each name once. 341 checkedRadioButtonNames[radioName] = radioName; 342 } 343 } else { 344 valueToCheck = input.is('input[type=checkbox],input[type=radio]') ? input.is(':checked') : !!input.val(); 345 if (valueToCheck === nonBlank) { 346 foundInputs = foundInputs.add(input); 347 } 348 } 349 }); 350 return foundInputs.length ? foundInputs : false; 351 }, 352 353 // Helper function which checks for non-blank inputs in a form that match the specified CSS selector 354 nonBlankInputs: function(form, specifiedSelector) { 355 return rails.blankInputs(form, specifiedSelector, true); // true specifies nonBlank 356 }, 357 358 // Helper function, needed to provide consistent behavior in IE 359 stopEverything: function(e) { 360 $(e.target).trigger('ujs:everythingStopped'); 361 e.stopImmediatePropagation(); 362 return false; 363 }, 364 365 // Replace element's html with the 'data-disable-with' after storing original html 366 // and prevent clicking on it 367 disableElement: function(element) { 368 var replacement = element.data('disable-with'); 369 370 if (replacement !== undefined) { 371 element.data('ujs:enable-with', element.html()); // store enabled state 372 element.html(replacement); 373 } 374 375 element.bind('click.railsDisable', function(e) { // prevent further clicking 376 return rails.stopEverything(e); 377 }); 378 element.data('ujs:disabled', true); 379 }, 380 381 // Restore element to its original state which was disabled by 'disableElement' above 382 enableElement: function(element) { 383 if (element.data('ujs:enable-with') !== undefined) { 384 element.html(element.data('ujs:enable-with')); // set to old enabled state 385 element.removeData('ujs:enable-with'); // clean up cache 386 } 387 element.unbind('click.railsDisable'); // enable element 388 element.removeData('ujs:disabled'); 389 } 390 }; 391 392 if (rails.fire($document, 'rails:attachBindings')) { 393 394 $.ajaxPrefilter(function(options, originalOptions, xhr){ if ( !options.crossDomain ) { rails.CSRFProtection(xhr); }}); 395 396 // This event works the same as the load event, except that it fires every 397 // time the page is loaded. 398 // 399 // See https://github.com/rails/jquery-ujs/issues/357 400 // See https://developer.mozilla.org/en-US/docs/Using_Firefox_1.5_caching 401 $(window).on('pageshow.rails', function () { 402 $($.rails.enableSelector).each(function () { 403 var element = $(this); 404 405 if (element.data('ujs:disabled')) { 406 $.rails.enableFormElement(element); 407 } 408 }); 409 410 $($.rails.linkDisableSelector).each(function () { 411 var element = $(this); 412 413 if (element.data('ujs:disabled')) { 414 $.rails.enableElement(element); 415 } 416 }); 417 }); 418 419 $document.delegate(rails.linkDisableSelector, 'ajax:complete', function() { 420 rails.enableElement($(this)); 421 }); 422 423 $document.delegate(rails.buttonDisableSelector, 'ajax:complete', function() { 424 rails.enableFormElement($(this)); 425 }); 426 427 $document.delegate(rails.linkClickSelector, 'click.rails', function(e) { 428 var link = $(this), method = link.data('method'), data = link.data('params'), metaClick = e.metaKey || e.ctrlKey; 429 if (!rails.allowAction(link)) return rails.stopEverything(e); 430 431 if (!metaClick && link.is(rails.linkDisableSelector)) rails.disableElement(link); 432 433 if (rails.isRemote(link)) { 434 if (metaClick && (!method || method === 'GET') && !data) { return true; } 435 436 var handleRemote = rails.handleRemote(link); 437 // Response from rails.handleRemote() will either be false or a deferred object promise. 438 if (handleRemote === false) { 439 rails.enableElement(link); 440 } else { 441 handleRemote.fail( function() { rails.enableElement(link); } ); 442 } 443 return false;
444 445 } else if (method) { 446 rails.handleMethod(link); 447 return false; 448 } 449 }); 450 451 $document.delegate(rails.buttonClickSelector, 'click.rails', function(e) { 452 var button = $(this); 453 454 if (!rails.allowAction(button) || !rails.isRemote(button)) return rails.stopEverything(e); 455 456 if (button.is(rails.buttonDisableSelector)) rails.disableFormElement(button); 457 458 var handleRemote = rails.handleRemote(button); 459 // Response from rails.handleRemote() will either be false or a deferred object promise. 460 if (handleRemote === false) { 461 rails.enableFormElement(button); 462 } else { 463 handleRemote.fail( function() { rails.enableFormElement(button); } ); 464 } 465 return false; 466 }); 467 468 $document.delegate(rails.inputChangeSelector, 'change.rails', function(e) { 469 var link = $(this); 470 if (!rails.allowAction(link) || !rails.isRemote(link)) return rails.stopEverything(e); 471 472 rails.handleRemote(link); 473 return false; 474 }); 475 476 $document.delegate(rails.formSubmitSelector, 'submit.rails', function(e) { 477 var form = $(this), 478 remote = rails.isRemote(form), 479 blankRequiredInputs, 480 nonBlankFileInputs; 481 482 if (!rails.allowAction(form)) return rails.stopEverything(e); 483 484 // Skip other logic when required values are missing or file upload is present 485 if (form.attr('novalidate') === undefined) { 486 if (form.data('ujs:formnovalidate-button') === undefined) { 487 blankRequiredInputs = rails.blankInputs(form, rails.requiredInputSelector, false); 488 if (blankRequiredInputs && rails.fire(form, 'ajax:aborted:required', [blankRequiredInputs])) { 489 return rails.stopEverything(e); 490 } 491 } else { 492 // Clear the formnovalidate in case the next button click is not on a formnovalidate button 493 // Not strictly necessary to do here, since it is also reset on each button click, but just to be certain 494 form.data('ujs:formnovalidate-button', undefined); 495 } 496 } 497 498 if (remote) { 499 nonBlankFileInputs = rails.nonBlankInputs(form, rails.fileInputSelector); 500 if (nonBlankFileInputs) { 501 // Slight timeout so that the submit button gets properly serialized 502 // (make it easy for event handler to serialize form without disabled values) 503 setTimeout(function(){ rails.disableFormElements(form); }, 13); 504 var aborted = rails.fire(form, 'ajax:aborted:file', [nonBlankFileInputs]); 505 506 // Re-enable form elements if event bindings return false (canceling normal form submission) 507 if (!aborted) { setTimeout(function(){ rails.enableFormElements(form); }, 13); } 508 509 return aborted; 510 } 511 512 rails.handleRemote(form); 513 return false; 514 515 } else { 516 // Slight timeout so that the submit button gets properly serialized 517 setTimeout(function(){ rails.disableFormElements(form); }, 13); 518 } 519 }); 520 521 $document.delegate(rails.formInputClickSelector, 'click.rails', function(event) { 522 var button = $(this); 523 524 if (!rails.allowAction(button)) return rails.stopEverything(event); 525 526 // Register the pressed submit button 527 var name = button.attr('name'), 528 data = name ? {name:name, value:button.val()} : null; 529 530 var form = button.closest('form'); 531 if (form.length === 0) { 532 form = $('#' + button.attr('form')); 533 } 534 form.data('ujs:submit-button', data); 535 536 // Save attributes from button 537 form.data('ujs:formnovalidate-button', button.attr('formnovalidate')); 538 form.data('ujs:submit-button-formaction', button.attr('formaction')); 539 form.data('ujs:submit-button-formmethod', button.attr('formmethod')); 540 }); 541 542 $document.delegate(rails.formSubmitSelector, 'ajax:send.rails', function(event) { 543 if (this === event.target) rails.disableFormElements($(this)); 544 }); 545 546 $document.delegate(rails.formSubmitSelector, 'ajax:complete.rails', function(event) { 547 if (this === event.target) rails.enableFormElements($(this)); 548 }); 549 550 $(function(){ 551 rails.refreshCSRFTokens(); 552 }); 553 } 554 555})( jQuery );
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