systrace/catapult/third_party/polymer/components/paper-item/paper-item.html

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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="paper-item-behavior.html">
<link rel="import" href="paper-item-shared-styles.html">

<!--
Material design: [Lists](https://www.google.com/design/spec/components/lists.html)

`<paper-item>` is an interactive list item. By default, it is a horizontal flexbox.

    <paper-item>Item</paper-item>

Use this element with `<paper-item-body>` to make Material Design styled two-line and three-line
items.

    <paper-item>
      <paper-item-body two-line>
        <div>Show your status</div>
        <div secondary>Your status is visible to everyone</div>
      </paper-item-body>
      <iron-icon icon="warning"></iron-icon>
    </paper-item>

To use `paper-item` as a link, wrap it in an anchor tag. Since `paper-item` will
already receive focus, you may want to prevent the anchor tag from receiving
focus as well by setting its tabindex to -1.

    <a href="https://www.polymer-project.org/" tabindex="-1">
      <paper-item raised>Polymer Project</paper-item>
    </a>

If you are concerned about performance and want to use `paper-item` in a `paper-listbox`
with many items, you can just use a native `button` with the `paper-item` class
applied (provided you have correctly included the shared styles):

    <style is="custom-style" include="paper-item-shared-styles"></style>

    <paper-listbox>
      <button class="paper-item" role="option">Inbox</button>
      <button class="paper-item" role="option">Starred</button>
      <button class="paper-item" role="option">Sent mail</button>
    </paper-listbox>

### Styling

The following custom properties and mixins are available for styling:

Custom property               | Description                                  | Default
------------------------------|----------------------------------------------|----------
`--paper-item-min-height`     | Minimum height of the item                   | `48px`
`--paper-item`                | Mixin applied to the item                    | `{}`
`--paper-item-selected-weight`| The font weight of a selected item           | `bold`
`--paper-item-selected`       | Mixin applied to selected paper-items        | `{}`
`--paper-item-disabled-color` | The color for disabled paper-items           | `--disabled-text-color`
`--paper-item-disabled`       | Mixin applied to disabled paper-items        | `{}`
`--paper-item-focused`        | Mixin applied to focused paper-items         | `{}`
`--paper-item-focused-before` | Mixin applied to :before focused paper-items | `{}`

### Accessibility

This element has `role="listitem"` by default. Depending on usage, it may be more appropriate to set
`role="menuitem"`, `role="menuitemcheckbox"` or `role="menuitemradio"`.

    <paper-item role="menuitemcheckbox">
      <paper-item-body>
        Show your status
      </paper-item-body>
      <paper-checkbox></paper-checkbox>
    </paper-item>

@group Paper Elements
@element paper-item
@demo demo/index.html
-->

<dom-module id="paper-item">
  <template>
    <style include="paper-item-shared-styles"></style>
    <style>
      :host {
        @apply(--layout-horizontal);
        @apply(--layout-center);
        @apply(--paper-font-subhead);

        @apply(--paper-item);
      }
    </style>

    <content></content>
  </template>

  <script>
    Polymer({
      is: 'paper-item',

      behaviors: [
        Polymer.PaperItemBehavior
      ]
    });
  </script>
</dom-module>