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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-validatable-behavior/iron-validatable-behavior.
html"> | |
13 | |
14 <script> | |
15 | |
16 /* | |
17 `<iron-input>` adds two-way binding and custom validators using `Polymer.IronVal
idatorBehavior` | |
18 to `<input>`. | |
19 | |
20 ### Two-way binding | |
21 | |
22 By default you can only get notified of changes to an `input`'s `value` due to u
ser input: | |
23 | |
24 <input value="{{myValue::input}}"> | |
25 | |
26 `iron-input` adds the `bind-value` property that mirrors the `value` property, a
nd can be used | |
27 for two-way data binding. `bind-value` will notify if it is changed either by us
er input or by script. | |
28 | |
29 <input is="iron-input" bind-value="{{myValue}}"> | |
30 | |
31 ### Custom validators | |
32 | |
33 You can use custom validators that implement `Polymer.IronValidatorBehavior` wit
h `<iron-input>`. | |
34 | |
35 <input is="iron-input" validator="my-custom-validator"> | |
36 | |
37 ### Stopping invalid input | |
38 | |
39 It may be desirable to only allow users to enter certain characters. You can use
the | |
40 `prevent-invalid-input` and `allowed-pattern` attributes together to accomplish
this. This feature | |
41 is separate from validation, and `allowed-pattern` does not affect how the input
is validated. | |
42 | |
43 <!-- only allow characters that match [0-9] --> | |
44 <input is="iron-input" prevent-invaild-input allowed-pattern="[0-9]"> | |
45 | |
46 @hero hero.svg | |
47 @demo demo/index.html | |
48 */ | |
49 | |
50 Polymer({ | |
51 | |
52 is: 'iron-input', | |
53 | |
54 extends: 'input', | |
55 | |
56 behaviors: [ | |
57 Polymer.IronValidatableBehavior | |
58 ], | |
59 | |
60 properties: { | |
61 | |
62 /** | |
63 * Use this property instead of `value` for two-way data binding. | |
64 */ | |
65 bindValue: { | |
66 observer: '_bindValueChanged', | |
67 type: String | |
68 }, | |
69 | |
70 /** | |
71 * Set to true to prevent the user from entering invalid input. The new in
put characters are | |
72 * matched with `allowedPattern` if it is set, otherwise it will use the `
pattern` attribute if | |
73 * set, or the `type` attribute (only supported for `type=number`). | |
74 */ | |
75 preventInvalidInput: { | |
76 type: Boolean | |
77 }, | |
78 | |
79 /** | |
80 * Regular expression to match valid input characters. | |
81 */ | |
82 allowedPattern: { | |
83 type: String | |
84 }, | |
85 | |
86 _previousValidInput: { | |
87 type: String, | |
88 value: '' | |
89 } | |
90 | |
91 }, | |
92 | |
93 listeners: { | |
94 'input': '_onInput', | |
95 'keydown': '_onKeydown' | |
96 }, | |
97 | |
98 get _patternRegExp() { | |
99 var pattern; | |
100 if (this.allowedPattern) { | |
101 pattern = new RegExp(this.allowedPattern); | |
102 } else if (this.pattern) { | |
103 pattern = new RegExp(this.pattern); | |
104 } else { | |
105 switch (this.type) { | |
106 case 'number': | |
107 pattern = /[0-9.,e-]/; | |
108 break; | |
109 } | |
110 } | |
111 return pattern; | |
112 }, | |
113 | |
114 ready: function() { | |
115 this.bindValue = this.value; | |
116 }, | |
117 | |
118 _bindValueChanged: function() { | |
119 if (this.value !== this.bindValue) { | |
120 this.value = this.bindValue; | |
121 } | |
122 // manually notify because we don't want to notify until after setting val
ue | |
123 this.fire('bind-value-changed', {value: this.bindValue}); | |
124 }, | |
125 | |
126 _onInput: function() { | |
127 this.bindValue = this.value; | |
128 }, | |
129 | |
130 _isPrintable: function(keyCode) { | |
131 var printable = | |
132 (keyCode > 47 && keyCode < 58) || // number keys | |
133 keyCode == 32 || keyCode == 13 || // spacebar & return key | |
134 (keyCode > 64 && keyCode < 91) || // letter keys | |
135 (keyCode > 95 && keyCode < 112) || // numpad keys | |
136 (keyCode > 185 && keyCode < 193) || // ;=,-./` (in order) | |
137 (keyCode > 218 && keyCode < 223); // [\]' (in order) | |
138 return printable; | |
139 }, | |
140 | |
141 // convert printable numpad keys to number keys | |
142 _correctNumpadKeys: function(keyCode) { | |
143 return (keyCode > 95 && keyCode < 112) ? keyCode - 48 : keyCode; | |
144 }, | |
145 | |
146 _onKeydown: function(event) { | |
147 if (!this.preventInvalidInput && this.type !== 'number') { | |
148 return; | |
149 } | |
150 var regexp = this._patternRegExp; | |
151 if (!regexp) { | |
152 return; | |
153 } | |
154 var thisChar = String.fromCharCode(this._correctNumpadKeys(event.keyCode))
; | |
155 if (this._isPrintable(event.keyCode) && !regexp.test(thisChar)) { | |
156 event.preventDefault(); | |
157 } | |
158 }, | |
159 | |
160 /** | |
161 * Returns true if `value` is valid. The validator provided in `validator` w
ill be used first, | |
162 * then any constraints. | |
163 * @return {Boolean} True if the value is valid. | |
164 */ | |
165 validate: function() { | |
166 // Empty, non-required input is valid. | |
167 if (!this.required && this.value == '') | |
168 return true; | |
169 | |
170 var valid; | |
171 if (this.hasValidator()) { | |
172 valid = Polymer.IronValidatableBehavior.validate.call(this, this.value); | |
173 } else { | |
174 this.invalid = !this.validity.valid; | |
175 valid = this.validity.valid; | |
176 } | |
177 this.fire('iron-input-validate'); | |
178 return valid; | |
179 } | |
180 | |
181 }); | |
182 | |
183 /* | |
184 The `iron-input-validate` event is fired whenever `validate()` is called. | |
185 @event iron-input-validate | |
186 */ | |
187 | |
188 </script> | |
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