px-icon.html

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Copyright (c) 2018, General Electric

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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    http://www.apache.org/licenses/LICENSE-2.0

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<link rel="import" href="../polymer/polymer.html" />
<link rel="import" href="../iron-flex-layout/iron-flex-layout.html" />
<link rel="import" href="../iron-icon/iron-icon.html" />

<dom-module id="px-icon">
  <template>
    <style>
      :host {
        /* Create some vars we can manipulate asour icons change*/
        --px-icon-default-width: 22px;
        --px-icon-default-height: 22px;
        --px-icon-stroke-width: 1;

        /* Update iron-icon vars so we can overwrite */
        --iron-icon-width: var(--px-icon-default-width);
        --iron-icon-height: var(--px-icon-default-height);

        /* Ensures the currentColor is overriden by the stroke color so text
           elements inside the SVG work correctly */
        color: var(--iron-icon-stroke-color, inherit);
        /* Reverses the standard iron-icon colors to have the stroke inherit
           currentcolor and fill default to none */
        fill: var(--iron-icon-fill-color, none);
        stroke: var(--iron-icon-stroke-color, currentColor);
        /* The rest of the properties are copied exactly from iron-icon */
        @apply --layout-inline;
        @apply --layout-center-center;
        position: relative;
        vertical-align: middle;

        width: var(--iron-icon-width);
        height: var(--iron-icon-height);
        stroke-width: var(--px-icon-stroke-width);
        @apply --iron-icon;
      }

      /* Also copied exactly from iron-icon */
      :host([hidden]) {
        display: none;
      }

      /* Set default sizes for all icons sets */
      :host([icon^='px-utl']),
      :host([icon^='px-doc']) {
        --px-icon-default-width: 16px;
        --px-icon-default-height: 16px;
      }

      :host([icon^='px-smx']),
      :host([icon^='px-obj']),
      :host([icon^='px-fea']),
      :host([icon^='px-com']) {
        --px-icon-default-width: 32px;
        --px-icon-default-height: 32px;
      }

      :host([icon^='px-smxl']) {
        --px-icon-default-width: 64px;
        --px-icon-default-height: 64px;
      }

      :host([icon^='px-smxs']) {
        --px-icon-default-width: 16px;
        --px-icon-default-height: 16px;
      }

      /* For "RTL" users, the next and prev icon are mirrored which should not be the case ,
        So when the direction of render is "RTL" then rotate the icon , just next and Prev
      */

      :host([icon^='px-nav:back']):host-context([dir='rtl']) {
        transform: rotate(180deg);
      }

      :host([icon^='px-nav:next']):host-context([dir='rtl']) {
        transform: rotate(180deg);
      }

      /* Forces iron-icon to inherit the :host scoped fill/stroke styles */
      iron-icon {
        color: inherit;
        fill: inherit;
        stroke: inherit;
        width: inherit;
        height: inherit;
      }

    </style>
    <iron-icon icon="[[icon]]"></iron-icon>
  </template>
</dom-module>
<script>
  Polymer({
    is: 'px-icon',
    properties: {
      icon: {
        type: String,
        reflectToAttribute: true,
        observer: '_updateStylesIndirect'
      }
    },

    _updateStylesIndirect: function () {
      //calling this without argument
      this.updateStyles();
    }
  })
</script>