overleaf/services/web/frontend/js/ide/review-panel/directives/addCommentEntry.js

import App from '../../../base'
let content = ''
App.directive('addCommentEntry', () => ({
  restrict: 'E',
  templateUrl: 'addCommentEntryTemplate',
  scope: {
    onStartNew: '&',
    onSubmit: '&',
    onCancel: '&',
  },
  link(scope, element, attrs) {
    scope.state = {
      isAdding: false,
      content: content,
    }

    scope.$on('comment:start_adding', () => scope.startNewComment())
    scope.$on('$destroy', function () {
      content = scope.state.content
    })

    scope.startNewComment = function () {
      scope.state.isAdding = true
      scope.onStartNew()
      setTimeout(() => scope.$broadcast('comment:new:open'))
    }

    scope.cancelNewComment = function () {
      scope.state.isAdding = false
      scope.state.content = ''
      scope.onCancel()
    }

    const ignoreKeysInTextAreas = ['PageDown', 'PageUp']

    scope.handleCommentKeyDown = function (ev) {
      if (ignoreKeysInTextAreas.includes(ev.key)) {
        if (ev.target.closest('textarea')) {
          ev.preventDefault()
        }
      }
    }

    scope.handleCommentKeyPress = function (ev) {
      if (ev.keyCode === 13 && !ev.shiftKey && !ev.ctrlKey && !ev.metaKey) {
        ev.preventDefault()
        if (scope.state.content.length > 0) {
          scope.submitNewComment()
        }
      }
    }

    scope.submitNewComment = function (event) {
      scope.onSubmit({ content: scope.state.content })
      content = scope.state.content
      scope.state.isAdding = false
      scope.state.content = ''
    }
  },
}))