Method init

background_scripts/tab_recency.js:21–58

()

  // Add listeners to chrome.tabs, and load the index from session storage.
  async init() {
    if (this.initPromise) {
      await this.initPromise;
      return;
    }
    let resolveFn;
    this.initPromise = new Promise((resolve, _reject) => {
      resolveFn = resolve;
    });

    chrome.tabs.onActivated.addListener((activeInfo) => {
      this.queueAction("register", activeInfo.tabId);
    });
    chrome.tabs.onRemoved.addListener((tabId) => {
      this.queueAction("deregister", tabId);
    });

    chrome.tabs.onReplaced.addListener((addedTabId, removedTabId) => {
      this.queueAction("deregister", removedTabId);
      this.queueAction("register", addedTabId);
    });

    chrome.windows.onFocusChanged.addListener(async (windowId) => {
      if (windowId == chrome.windows.WINDOW_ID_NONE) return;
      const tabs = await chrome.tabs.query({ windowId, active: true });
      if (tabs[0]) {
        this.queueAction("register", tabs[0].id);
      }
    });

    await this.loadFromStorage();
    while (this.queuedActions.length > 0) {
      const [action, tabId] = this.queuedActions.shift();
      this.handleAction(action, tabId);
    }
    this.loaded = true;
    resolveFn();
  }

  // Loads the index from session storage.
  async loadFromStorage() {