overleaf/services/web/frontend/js/ide/history/directives/historyDraggableBoundary.js

import App from '../../../base'

export default App.directive('historyDraggableBoundary', () => ({
  scope: {
    historyDraggableBoundary: '@',
    historyDraggableBoundaryOnDragStart: '&',
    historyDraggableBoundaryOnDragStop: '&',
  },
  restrict: 'A',
  link(scope, element, attrs) {
    element.data('selectionBoundary', {
      boundary: scope.historyDraggableBoundary,
    })
    element.draggable({
      axis: 'y',
      opacity: false,
      helper: 'clone',
      revert: true,
      scroll: true,
      cursor: 'row-resize',
      start(e, ui) {
        ui.helper.data('wasProperlyDropped', false)
        scope.historyDraggableBoundaryOnDragStart()
      },
      stop(e, ui) {
        scope.historyDraggableBoundaryOnDragStop({
          isValidDrop: ui.helper.data('wasProperlyDropped'),
          boundary: scope.historyDraggableBoundary,
        })
      },
    })
  },
}))