Function removeTabFromNode

src/browser/utils/rightSidebarLayout.ts:195–230

(
  node: RightSidebarLayoutNode,
  tab: TabType
)

}

function removeTabFromNode(
  node: RightSidebarLayoutNode,
  tab: TabType
): RightSidebarLayoutNode | null {
  if (node.type === "tabset") {
    const oldIndex = node.tabs.indexOf(tab);
    const tabs = node.tabs.filter((t) => t !== tab);
    if (tabs.length === 0) return null;

    let activeTab = node.activeTab;
    if (node.activeTab === tab) {
      activeTab = tabs[Math.min(oldIndex, tabs.length - 1)];
    }
    return {
      ...node,
      tabs,
      activeTab: tabs.includes(activeTab) ? activeTab : tabs[0],
    };
  }

  const left = removeTabFromNode(node.children[0], tab);
  const right = removeTabFromNode(node.children[1], tab);

  if (!left && !right) {
    return null;
  }

  // If one side goes empty, promote the other side to avoid empty panes.
  if (!left) return right;
  if (!right) return left;

  return {
    ...node,
    children: [left, right],
  };
}

export function removeTabEverywhere(
  state: RightSidebarLayoutState,