bower_components/paper-card/paper-card.html

<!--
@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-material/paper-material.html">
<link rel="import" href="../iron-flex-layout/iron-flex-layout.html">
<!--
Material Design: <a href="http://www.google.com/design/spec/components/cards.html">Cards</a>
`paper-card` is a container with a drop shadow.
Example:
    <paper-card heading="Card Title">
      <div class="card-content">Some content</div>
      <div class="card-actions">
        <paper-button>Some action</paper-button>
      </div>
    </paper-card>
Example - top card image:
    <paper-card heading="Card Title" image="/path/to/image.png">
      ...
    </paper-card>
    
### Accessibility
By default, the `aria-label` will be set to the value of the `heading` attribute.
### Styling
The following custom properties and mixins are available for styling:
Custom property | Description | Default
----------------|-------------|----------
`--paper-card-header-color` | The color of the header text | `#000`
`--paper-card-header` | Mixin applied to the card header section | `{}`
`--paper-card-header-text` | Mixin applied to the title in the card header section | `{}`
`--paper-card-header-image` | Mixin applied to the image in the card header section | `{}`
`--paper-card-header-image-text` | Mixin applied to the text overlapping the image in the card header section | `{}`
`--paper-card-content` | Mixin applied to the card content section| `{}`
`--paper-card-actions` | Mixin applied to the card action section | `{}`
`--paper-card` | Mixin applied to the card | `{}`
@group Paper Elements
@element paper-card
@demo demo/index.html
-->
<dom-module id="paper-card">
  <template>
    <style>
      :host {
        display: inline-block;
        position: relative;
        box-sizing: border-box;
        background: #fff;
        border-radius: 2px;
        @apply(--paper-card);
      }
      paper-material {
        border-radius: inherit;
        @apply(--layout-fit);
      }
      /* IE 10 support for HTML5 hidden attr */
      [hidden] {
        display: none !important;
      }
      .header {
        position: relative;
        @apply(--paper-card-header);
      }
      .header img {
        width: 100%;
        pointer-events: none;
        @apply(--paper-card-header-image);
      }
      .header .title-text {
        padding: 16px;
        font-size: 24px;
        font-weight: bold;
        color: var(--paper-card-header-color, #000);
        @apply(--paper-card-header-text);
      }
      .header .title-text.over-image {
        position: absolute;
        bottom: 0px;
        @apply(--paper-card-header-image-text);
      }
      :host ::content .card-content {
        padding: 16px;
        position:relative;
        @apply(--paper-card-content);
      }
      :host ::content .card-actions {
        border-top: 1px solid #e8e8e8;
        padding: 5px 16px;
        position:relative;
        @apply(--paper-card-actions);
      }
    </style>
    <paper-material animated$="[[animatedShadow]]" elevation="[[elevation]]"></paper-material>
    <div class="header">
      <img hidden$="[[!image]]" src="[[image]]">
      <div hidden$="[[!heading]]" class$="[[_computeHeadingClass(image)]]">[[heading]]</div>
    </div>
    <content></content>
  </template>
</dom-module>
<script>
  Polymer({
    is: 'paper-card',
    properties: {
      /**
       * The title of the card.
       */
      heading: {
        type: String,
        value: '',
        observer: '_headingChanged'
      },
      /**
       * The url of the title image of the card.
       */
      image: {
        type: String,
        value: ''
      },
      /**
       * The z-depth of the card, from 0-5.
       */
      elevation: {
        type: Number,
        value: 1
      },
      /**
       * Set this to true to animate the card shadow when setting a new
       * `z` value.
       */
      animatedShadow: {
        type: Boolean,
        value: false
      }
    },
    _headingChanged: function(heading) {
      var label = this.getAttribute('aria-label');
      this.setAttribute('aria-label', heading);
    },
    _computeHeadingClass: function(image) {
      var cls = 'title-text';
      if (image)
        cls += ' over-image';
      return cls;
    }
  });
</script>