private async handleKeyCommands()

in fuse-ui-fabric/tree/treeView.tsx [307:359]
49 lines of code
17 McCabe index (conditional complexity)

  private async handleKeyCommands(e: React.KeyboardEvent<HTMLElement>) {
    const code = e.keyCode;
    let isHandled = true;
    let nextNode: ITreeNodeView = null;

    if (!this.selected || this.selected.editing) {
      return;
    }

    switch (code) {
      case KeyCodes.up:
        nextNode = this.findPrev(this.selected);
        if (nextNode) {
          this.selectNode(nextNode);
        }
        break;
      case KeyCodes.down:
        nextNode = this.findNext(this.selected);
        if (nextNode) {
          this.selectNode(nextNode);
        }
        break;
      case KeyCodes.del:
        await this.confirmThenDelete();
        break;
      case 113: //F2
        this.selected.edit();
        break;
      case KeyCodes.right:
        if (this.selected != null && this.selected.node.type === 'container') {
          // expand container if not already expanded.
          if (!this.selected.expanded) {
            this.selected.expand();
          }
        }
        break;
      case KeyCodes.left:
        this.handleCollapse();
        break;
      case 121: //F10
        if (e.shiftKey) {
          this.setState({ contextVisible: true, contextTarget: null });
        }
        break;
      default:
        isHandled = false;
    }

    if (isHandled) {
      e.preventDefault();
      e.stopPropagation();
    }
  }