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| 1 <!-- |
| 2 @license |
| 3 Copyright (c) 2015 The Polymer Project Authors. All rights reserved. |
| 4 This code may only be used under the BSD style license found at http://polymer.g
ithub.io/LICENSE.txt |
| 5 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt |
| 6 The complete set of contributors may be found at http://polymer.github.io/CONTRI
BUTORS.txt |
| 7 Code distributed by Google as part of the polymer project is also |
| 8 subject to an additional IP rights grant found at http://polymer.github.io/PATEN
TS.txt |
| 9 --> |
| 10 |
| 11 <link rel="import" href="../polymer/polymer.html"> |
| 12 <link rel="import" href="../iron-ajax/iron-ajax.html"> |
| 13 |
| 14 <script> |
| 15 /* |
| 16 ``<iron-form>` is an HTML `<form>` element that can validate and submit any cust
om |
| 17 elements that implement `Polymer.IronFormElementBehavior`, as well as any |
| 18 native HTML elements. |
| 19 |
| 20 It supports both `get` and `post` methods, and uses an `iron-ajax` element to |
| 21 submit the form data to the action URL. |
| 22 |
| 23 Example: |
| 24 |
| 25 <form is="iron-form" id="form" method="post" action="/form/handler"> |
| 26 <paper-input name="name" label="name"></paper-input> |
| 27 <input name="address"> |
| 28 ... |
| 29 </form> |
| 30 |
| 31 By default, a native `<button>` element will submit this form. However, if you |
| 32 want to submit it from a custom element's click handler, you need to explicitly |
| 33 call the form's `submit` method. |
| 34 |
| 35 Example: |
| 36 |
| 37 <paper-button raised onclick="submitForm()">Submit</paper-button> |
| 38 |
| 39 function submitForm() { |
| 40 document.getElementById('form').submit(); |
| 41 } |
| 42 |
| 43 @demo demo/index.html |
| 44 */ |
| 45 |
| 46 Polymer({ |
| 47 |
| 48 is: 'iron-form', |
| 49 |
| 50 extends: 'form', |
| 51 |
| 52 properties: { |
| 53 /** |
| 54 * Content type to use when sending data. |
| 55 */ |
| 56 contentType: { |
| 57 type: String, |
| 58 value: "application/x-www-form-urlencoded" |
| 59 } |
| 60 }, |
| 61 /** |
| 62 * Fired if the form cannot be submitted because it's invalid. |
| 63 * |
| 64 * @event iron-form-invalid |
| 65 */ |
| 66 |
| 67 /** |
| 68 * Fired after the form is submitted. |
| 69 * |
| 70 * @event iron-form-submit |
| 71 */ |
| 72 |
| 73 /** |
| 74 * Fired after the form is submitted and a response is received. |
| 75 * |
| 76 * @event iron-form-response |
| 77 */ |
| 78 |
| 79 /** |
| 80 * Fired after the form is submitted and an error is received. |
| 81 * |
| 82 * @event iron-form-error |
| 83 */ |
| 84 listeners: { |
| 85 'iron-form-element-register': '_registerElement', |
| 86 'submit': '_onSubmit' |
| 87 }, |
| 88 |
| 89 ready: function() { |
| 90 // Object that handles the ajax form submission request. |
| 91 this._requestBot = document.createElement('iron-ajax'); |
| 92 this._requestBot.addEventListener('response', this._handleFormResponse.bin
d(this)); |
| 93 this._requestBot.addEventListener('error', this._handleFormError.bind(this
)); |
| 94 |
| 95 // Holds all the custom elements registered with this form. |
| 96 this._customElements = []; |
| 97 }, |
| 98 |
| 99 /** |
| 100 * Called to submit the form. |
| 101 */ |
| 102 submit: function() { |
| 103 if (!this.noValidate && !this._validate()) { |
| 104 |
| 105 // In order to trigger the native browser invalid-form UI, we need |
| 106 // to do perform a fake form submit. |
| 107 this._doFakeSubmitForValidation(); |
| 108 this.fire('iron-form-invalid'); |
| 109 return; |
| 110 } |
| 111 |
| 112 var json = this.serialize(); |
| 113 |
| 114 this._requestBot.url = this.action; |
| 115 this._requestBot.method = this.method; |
| 116 this._requestBot.contentType = this.contentType; |
| 117 |
| 118 if (this.method.toUpperCase() == 'POST') { |
| 119 this._requestBot.body = JSON.stringify(json); |
| 120 } else { |
| 121 this._requestBot.params = json; |
| 122 } |
| 123 |
| 124 this._requestBot.generateRequest(); |
| 125 this.fire('iron-form-submit', json); |
| 126 }, |
| 127 |
| 128 _onSubmit: function(event) { |
| 129 this.submit(); |
| 130 |
| 131 // Don't perform a page refresh. |
| 132 if (event) { |
| 133 event.preventDefault(); |
| 134 } |
| 135 |
| 136 return false; |
| 137 }, |
| 138 |
| 139 /** |
| 140 * Returns a json object containing name/value pairs for all the registered |
| 141 * custom components and native elements of the form. If there are elements |
| 142 * with duplicate names, then their values will get aggregated into an |
| 143 * array of values. |
| 144 */ |
| 145 serialize: function() { |
| 146 var json = {}; |
| 147 |
| 148 function addSerializedElement(el) { |
| 149 // If the name doesn't exist, add it. Otherwise, serialize it to |
| 150 // an array, |
| 151 if (!json[el.name]) { |
| 152 json[el.name] = el.value; |
| 153 } else { |
| 154 if (!Array.isArray(json[el.name])) { |
| 155 json[el.name] = [json[el.name]]; |
| 156 } |
| 157 json[el.name].push(el.value); |
| 158 } |
| 159 } |
| 160 |
| 161 // Go through all of the registered custom components. |
| 162 for (var el, i = 0; el = this._customElements[i], i < this._customElements
.length; i++) { |
| 163 if (el.name) { |
| 164 addSerializedElement(el); |
| 165 } |
| 166 } |
| 167 |
| 168 // Also go through the form's native elements. |
| 169 for (var el, i = 0; el = this.elements[i], i < this.elements.length; i++)
{ |
| 170 // Checkboxes and radio buttons should only use their value if they're c
hecked. |
| 171 // Also, custom elements that extend native elements (like an |
| 172 // `<input is="fancy-input">`) will appear in both lists. Since they |
| 173 // were already added as a custom element, they don't need |
| 174 // to be re-added. |
| 175 if (!el.name || !this._useValue(el) || |
| 176 (el.hasAttribute('is') && json[el.name])) { |
| 177 continue; |
| 178 } |
| 179 addSerializedElement(el); |
| 180 } |
| 181 |
| 182 return json; |
| 183 }, |
| 184 |
| 185 _handleFormResponse: function (event) { |
| 186 this.fire('iron-form-response', event.detail.response); |
| 187 }, |
| 188 |
| 189 _handleFormError: function (event) { |
| 190 this.fire('iron-form-error', event.detail); |
| 191 }, |
| 192 |
| 193 _registerElement: function(e) { |
| 194 this._customElements.push(e.target); |
| 195 }, |
| 196 |
| 197 _validate: function() { |
| 198 var valid = true; |
| 199 |
| 200 // Validate all the custom elements. |
| 201 var validatable; |
| 202 for (var el, i = 0; el = this._customElements[i], i < this._customElements
.length; i++) { |
| 203 if (el.required) { |
| 204 validatable = /** @type {{validate: (function() : boolean)}} */ (el); |
| 205 valid = validatable.validate() && valid; |
| 206 } |
| 207 } |
| 208 |
| 209 // Validate the form's native elements. |
| 210 for (var el, i = 0; el = this.elements[i], i < this.elements.length; i++)
{ |
| 211 // Custom elements that extend a native element will also appear in |
| 212 // this list, but they've already been validated. |
| 213 if (!el.hasAttribute('is') && el.willValidate && el.checkValidity) { |
| 214 valid = el.checkValidity() && valid; |
| 215 } |
| 216 } |
| 217 |
| 218 return valid; |
| 219 }, |
| 220 |
| 221 _useValue: function(el) { |
| 222 // Checkboxes and radio buttons should only use their value if they're che
cked. |
| 223 if (el.type !== 'checkbox' && el.type !== 'radio') { |
| 224 return true; |
| 225 } else { |
| 226 return el.checked; |
| 227 } |
| 228 }, |
| 229 |
| 230 _doFakeSubmitForValidation: function() { |
| 231 var fakeSubmit = document.createElement('input'); |
| 232 fakeSubmit.setAttribute('type', 'submit'); |
| 233 fakeSubmit.style.display = 'none'; |
| 234 this.appendChild(fakeSubmit); |
| 235 |
| 236 fakeSubmit.click(); |
| 237 |
| 238 this.removeChild(fakeSubmit); |
| 239 } |
| 240 |
| 241 }); |
| 242 |
| 243 </script> |
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