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third_party/polymer/components/paper-radio-button/paper-radio-button.html

Index: third_party/polymer/components/paper-radio-button/paper-radio-button.html
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+<!--
+@license
+Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+
+<link rel="import" href="../polymer/polymer.html">
+<link rel="import" href="../paper-behaviors/paper-checked-element-behavior.html">
+<link rel="import" href="../paper-styles/default-theme.html">
+<link rel="import" href="../iron-flex-layout/iron-flex-layout.html">
+
+<!--
+Material design: [Radio button](https://www.google.com/design/spec/components/selection-controls.html#selection-controls-radio-button)
+
+`paper-radio-button` is a button that can be either checked or unchecked.
+User can tap the radio button to check or uncheck it.
+
+Use a `<paper-radio-group>` to group a set of radio buttons.  When radio buttons
+are inside a radio group, exactly one radio button in the group can be checked
+at any time.
+
+Example:
+
+    <paper-radio-button></paper-radio-button>
+    <paper-radio-button>Item label</paper-radio-button>
+
+### Styling
+
+The following custom properties and mixins are available for styling:
+
+Custom property | Description | Default
+----------------|-------------|----------
+`--paper-radio-button-unchecked-background-color` | Radio button background color when the input is not checked | `transparent`
+`--paper-radio-button-unchecked-color` | Radio button color when the input is not checked | `--primary-text-color`
+`--paper-radio-button-unchecked-ink-color` | Selected/focus ripple color when the input is not checked | `--primary-text-color`
+`--paper-radio-button-checked-color` | Radio button color when the input is checked | `--primary-color`
+`--paper-radio-button-checked-ink-color` | Selected/focus ripple color when the input is checked | `--primary-color`
+`--paper-radio-button-size` | Size of the radio button | `16px`
+`--paper-radio-button-ink-size` | Size of the ripple | `48px`
+`--paper-radio-button-label-color` | Label color | `--primary-text-color`
+`--paper-radio-button-label-spacing` | Spacing between the label and the button | `10px`
+`--paper-radio-button-radio-container` | A mixin applied to the internal radio container | `{}`
+`--paper-radio-button-label` | A mixin applied to the internal label | `{}`
+`--paper-radio-button-label-checked` | A mixin applied to the internal label when the radio button is checked | `{}`
+
+This element applies the mixin `--paper-font-common-base` but does not import `paper-styles/typography.html`.
+In order to apply the `Roboto` font to this element, make sure you've imported `paper-styles/typography.html`.
+
+@group Paper Elements
+@element paper-radio-button
+@hero hero.svg
+@demo demo/index.html
+-->
+
+<dom-module id="paper-radio-button">
+  <template strip-whitespace>
+    <style>
+      :host {
+        display: inline-block;
+        line-height: 0;
+        white-space: nowrap;
+        cursor: pointer;
+        @apply(--paper-font-common-base);
+        --calculated-paper-radio-button-size: var(--paper-radio-button-size, 16px);
+        /* -1px is a sentinel for the default and is replace in `attached`. */
+        --calculated-paper-radio-button-ink-size: var(--paper-radio-button-ink-size, -1px);
+      }
+
+      :host(:focus) {
+        outline: none;
+      }
+
+      #radioContainer {
+        @apply(--layout-inline);
+        @apply(--layout-center-center);
+        position: relative;
+        width: var(--calculated-paper-radio-button-size);
+        height: var(--calculated-paper-radio-button-size);
+        vertical-align: middle;
+        
+        @apply(--paper-radio-button-radio-container);
+      }
+
+      #ink {
+        position: absolute;
+        top: 50%;
+        left: 50%;
+        right: auto;
+        width: var(--calculated-paper-radio-button-ink-size);
+        height: var(--calculated-paper-radio-button-ink-size);
+        color: var(--paper-radio-button-unchecked-ink-color, --primary-text-color);
+        opacity: 0.6;
+        pointer-events: none;
+        -webkit-transform: translate(-50%, -50%);
+        transform: translate(-50%, -50%);
+      }
+
+      #ink[checked] {
+        color: var(--paper-radio-button-checked-ink-color, --primary-color);
+      }
+
+      #offRadio, #onRadio {
+        position: absolute;
+        box-sizing: border-box;
+        top: 0;
+        left: 0;
+        width: 100%;
+        height: 100%;
+        border-radius: 50%;
+      }
+
+      #offRadio {
+        border: 2px solid var(--paper-radio-button-unchecked-color, --primary-text-color);
+        background-color: var(--paper-radio-button-unchecked-background-color, transparent);
+        transition: border-color 0.28s;
+      }
+
+      #onRadio {
+        background-color: var(--paper-radio-button-checked-color, --primary-color);
+        -webkit-transform: scale(0);
+        transform: scale(0);
+        transition: -webkit-transform ease 0.28s;
+        transition: transform ease 0.28s;
+        will-change: transform;
+      }
+
+      :host([checked]) #offRadio {
+        border-color: var(--paper-radio-button-checked-color, --primary-color);
+      }
+
+      :host([checked]) #onRadio {
+        -webkit-transform: scale(0.5);
+        transform: scale(0.5);
+      }
+
+      #radioLabel {
+        line-height: normal;
+        position: relative;
+        display: inline-block;
+        vertical-align: middle;
+        margin-left: var(--paper-radio-button-label-spacing, 10px);
+        white-space: normal;
+        color: var(--paper-radio-button-label-color, --primary-text-color);
+
+        @apply(--paper-radio-button-label);
+      }
+
+      :host([checked]) #radioLabel {
+        @apply(--paper-radio-button-label-checked);
+      }
+
+      :host-context([dir="rtl"]) #radioLabel {
+        margin-left: 0;
+        margin-right: var(--paper-radio-button-label-spacing, 10px);
+      }
+
+      #radioLabel[hidden] {
+        display: none;
+      }
+
+      /* disabled state */
+
+      :host([disabled]) #offRadio {
+        border-color: var(--paper-radio-button-unchecked-color, --primary-text-color);
+        opacity: 0.5;
+      }
+
+      :host([disabled][checked]) #onRadio {
+        background-color: var(--paper-radio-button-unchecked-color, --primary-text-color);
+        opacity: 0.5;
+      }
+
+      :host([disabled]) #radioLabel {
+        /* slightly darker than the button, so that it's readable */
+        opacity: 0.65;
+      }
+    </style>
+
+    <div id="radioContainer">
+      <div id="offRadio"></div>
+      <div id="onRadio"></div>
+    </div>
+
+    <div id="radioLabel"><content></content></div>
+  </template>
+
+  <script>
+    Polymer({
+      is: 'paper-radio-button',
+
+      behaviors: [
+        Polymer.PaperCheckedElementBehavior
+      ],
+
+      hostAttributes: {
+        role: 'radio',
+        'aria-checked': false,
+        tabindex: 0
+      },
+
+      properties: {
+        /**
+         * Fired when the checked state changes due to user interaction.
+         *
+         * @event change
+         */
+
+        /**
+         * Fired when the checked state changes.
+         *
+         * @event iron-change
+         */
+
+        ariaActiveAttribute: {
+          type: String,
+          value: 'aria-checked'
+        }
+      },
+
+      ready: function() {
+        this._rippleContainer = this.$.radioContainer;
+      },
+
+      attached: function() {
+        var inkSize = this.getComputedStyleValue('--calculated-paper-radio-button-ink-size').trim();
+        // If unset, compute and set the default `--paper-radio-button-ink-size`.
+        if (inkSize === '-1px') {
+          var size = parseFloat(this.getComputedStyleValue('--calculated-paper-radio-button-size').trim());
+          var defaultInkSize = Math.floor(3 * size);
+
+          // The button and ripple need to have the same parity so that their
+          // centers align.
+          if (defaultInkSize % 2 !== size % 2) {
+            defaultInkSize++;
+          }
+
+          this.customStyle['--paper-radio-button-ink-size'] = defaultInkSize + 'px';
+          this.updateStyles();
+        }
+      },
+    })
+  </script>
+</dom-module>