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