frontend/src/layouts/ha-app-layout.js

/* eslint-plugin-disable lit */
/**
@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
*/
/*
This code is copied from app-header-layout.
'fullbleed' support is removed as Home Assisstant doesn't use it.
transform: translate(0) is added.
*/
/*
  FIXME(polymer-modulizer): the above comments were extracted
  from HTML and may be out of place here. Review them and
  then delete this comment!
*/
import "@polymer/app-layout/app-header-layout/app-header-layout";
import { html } from "@polymer/polymer/lib/utils/html-tag";
import "@polymer/polymer/polymer-element";

class HaAppLayout extends customElements.get("app-header-layout") {
  static get template() {
    return html`
      <style>
        :host {
          display: block;
          /**
         * Force app-header-layout to have its own stacking context so that its parent can
         * control the stacking of it relative to other elements (e.g. app-drawer-layout).
         * This could be done using \`isolation: isolate\`, but that's not well supported
         * across browsers.
         */
          position: relative;
          z-index: 0;
        }

        #wrapper ::slotted([slot="header"]) {
          @apply --layout-fixed-top;
          z-index: 1;
        }

        #wrapper.initializing ::slotted([slot="header"]) {
          position: relative;
        }

        :host([has-scrolling-region]) {
          height: 100%;
        }

        :host([has-scrolling-region]) #wrapper ::slotted([slot="header"]) {
          position: absolute;
        }

        :host([has-scrolling-region])
          #wrapper.initializing
          ::slotted([slot="header"]) {
          position: relative;
        }

        :host([has-scrolling-region]) #wrapper #contentContainer {
          @apply --layout-fit;
          overflow-y: auto;
          -webkit-overflow-scrolling: touch;
        }

        :host([has-scrolling-region]) #wrapper.initializing #contentContainer {
          position: relative;
        }

        #contentContainer {
          /* Create a stacking context here so that all children appear below the header. */
          position: relative;
          z-index: 0;
          /* Using 'transform' will cause 'position: fixed' elements to behave like
           'position: absolute' relative to this element. */
          transform: translate(0);
          margin-left: env(safe-area-inset-left);
          margin-right: env(safe-area-inset-right);
        }

        @media print {
          :host([has-scrolling-region]) #wrapper #contentContainer {
            overflow-y: visible;
          }
        }
      </style>

      <div id="wrapper" class="initializing">
        <slot id="headerSlot" name="header"></slot>

        <div id="contentContainer"><slot></slot></div>
        <slot id="fab" name="fab"></slot>
      </div>
    `;
  }
}
customElements.define("ha-app-layout", HaAppLayout);