forked from mirrors/gecko-dev
0de6e5d4aa
This custom element replaces XBL <content> usage by directly prepend the two needed child nodes when the element is connected. This is doable because - There isn't any direct access of child nodes under <menulist>. Everyone seems to access via .menupopup, which is usually the only child. - We don't need to move the children under <menulist>. If we need to and if the child is a <xbl:children> (which could happen if <menulist> is inside an XBL <content> that just get cloned to the document), the layout will get very confused and crash (see finding in bug 1514926) Differential Revision: https://phabricator.services.mozilla.com/D16149 --HG-- rename : toolkit/content/widgets/menulist.xml => toolkit/content/widgets/menulist.js extra : moz-landing-system : lando
32 lines
966 B
JavaScript
32 lines
966 B
JavaScript
/* - This Source Code Form is subject to the terms of the Mozilla Public
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- License, v. 2.0. If a copy of the MPL was not distributed with this file,
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- You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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var EXPORTED_SYMBOLS = ["SelectionChangedMenulist"];
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class SelectionChangedMenulist {
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// A menulist wrapper that will open the popup when navigating with the
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// keyboard on Windows and trigger the provided handler when the popup
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// is hiding. This matches the behaviour of MacOS and Linux more closely.
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constructor(menulist, onCommand) {
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let popup = menulist.menupopup;
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let lastEvent;
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menulist.addEventListener("command", event => {
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lastEvent = event;
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if (popup.state != "open" && popup.state != "showing") {
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popup.openPopup();
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}
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});
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popup.addEventListener("popuphiding", () => {
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if (lastEvent) {
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onCommand(lastEvent);
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lastEvent = null;
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}
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});
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}
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}
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