forked from mirrors/gecko-dev
54 lines
1.6 KiB
JavaScript
54 lines
1.6 KiB
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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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import { EventEmitter } from "resource:///modules/syncedtabs/EventEmitter.sys.mjs";
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/**
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* SyncedTabsDeckStore
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*
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* This store keeps track of the deck view state, including the panels and which
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* one is selected. The view listens for change events on the store, which are
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* triggered whenever the state changes. If it's a small change, the state
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* will have `isUpdatable` set to true so the view can skip rerendering the whole
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* DOM.
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*/
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export function SyncedTabsDeckStore() {
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EventEmitter.call(this);
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this._panels = [];
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}
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Object.assign(SyncedTabsDeckStore.prototype, EventEmitter.prototype, {
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_change(isUpdatable = false) {
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let panels = this._panels.map(panel => {
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return { id: panel, selected: panel === this._selectedPanel };
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});
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this.emit("change", { panels, isUpdatable });
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},
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/**
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* Sets the selected panelId and triggers a change event.
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*
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* @param {string} panelId - ID of the panel to select.
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*/
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selectPanel(panelId) {
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if (!this._panels.includes(panelId) || this._selectedPanel === panelId) {
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return;
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}
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this._selectedPanel = panelId;
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this._change(true);
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},
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/**
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* Update the set of panels in the deck and trigger a change event.
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*
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* @param {Array} panels - an array of IDs for each panel in the deck.
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*/
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setPanels(panels) {
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if (panels === this._panels) {
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return;
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}
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this._panels = panels || [];
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this._change();
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},
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});
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