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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
/**
* Dummy container node used for the root document element.
*/
function RootContainer(markupView, node) {
this.doc = markupView.doc;
this.elt = this.doc.createElement("ul");
// Root container has tree semantics for accessibility.
this.elt.setAttribute("role", "tree");
this.elt.setAttribute("tabindex", "0");
this.elt.setAttribute("aria-dropeffect", "none");
this.elt.container = this;
this.children = this.elt;
this.node = node;
this.toString = () => "[root container]";
}
RootContainer.prototype = {
hasChildren: true,
expanded: true,
update: function () {},
destroy: function () {},
/**
* If the node has children, return the list of containers for all these children.
* @return {Array} An array of child containers or null.
*/
getChildContainers: function () {
return [...this.children.children].filter(node => node.container)
.map(node => node.container);
},
/**
* Set the expanded state of the container node.
* @param {Boolean} value
*/
setExpanded: function () {},
/**
* Set an appropriate role of the container's children node.
*/
setChildrenRole: function () {},
/**
* Set an appropriate DOM tree depth level for a node and its subtree.
*/
updateLevel: function () {}
};
module.exports = RootContainer;
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