export function initToolbar()

in src/overlay/toolbar.ts [23:91]
34 lines of code
2 McCabe index (conditional complexity)

export function initToolbar(
  notebook: NotebookPanel,
  gatherModel: GatherModel,
  codeGatheringExtension: CodeGatheringExtension
): Widget[] {
  function _getIndexAfterSpacer(notebook: NotebookPanel) {
    let index = 1;
    let toolNames = notebook.toolbar.names();
    let nextName = toolNames.next();
    while (nextName != undefined && nextName != 'spacer') {
      index += 1;
      nextName = toolNames.next();
    }
    return index;
  }

  function _addGatherLabel(notebook: NotebookPanel, insertIndex: number) {
    let gatherLabelWidget = new Widget();
    let labelLayout = (gatherLabelWidget.layout = new PanelLayout());
    let gatherLabel = new Widget({ node: document.createElement('span') });
    gatherLabel.addClass('jp-GatherLabel');
    gatherLabel.node.textContent = 'Gather to:';
    labelLayout.addWidget(gatherLabel);
    notebook.toolbar.insertItem(insertIndex, 'gatherLabel', gatherLabelWidget);
    return gatherLabelWidget;
  }

  function _addSpacer(notebook: NotebookPanel, insertIndex: number) {
    let gatherSpacer = new Widget();
    gatherSpacer.addClass('jp-GatherSpacer');
    notebook.toolbar.insertItem(insertIndex, 'gatherSpacer', gatherSpacer);
    return gatherSpacer;
  }

  let widgets = [];
  let insertIndex = _getIndexAfterSpacer(notebook);
  let label = _addGatherLabel(notebook, insertIndex);
  widgets.push(label);
  insertIndex += 1;

  let buttons = [
    new GatherToClipboardButton(
      gatherModel,
      codeGatheringExtension.gatherToClipboard.bind(codeGatheringExtension)
    ),
    new GatherToNotebookButton(
      gatherModel,
      codeGatheringExtension.gatherToNotebook.bind(codeGatheringExtension)
    ),
    /*
     * The following line adds a button for gathering code to a script.
     */
    // new GatherToScriptButton(gatherModel, codeGatheringExtension.gatherToScript.bind(codeGatheringExtension)),
    new GatherRevisionsButton(
      gatherModel,
      codeGatheringExtension.gatherRevisions.bind(codeGatheringExtension)
    ),
    new ClearButton(gatherModel),
  ];
  for (let button of buttons) {
    notebook.toolbar.insertItem(insertIndex, button.getName(), button);
    widgets.push(button);
    insertIndex += 1;
  }

  let spacer = _addSpacer(notebook, insertIndex);
  widgets.push(spacer);
  return widgets;
}