Overleaf/services/web/frontend/js/ide/editor/directives/aceEditor.js

import _ from 'lodash'
/* eslint-disable
    camelcase,
    max-len
 */
import App from '../../../base'
import UndoManager from './aceEditor/undo/UndoManager'
import AutoCompleteManager from './aceEditor/auto-complete/AutoCompleteManager'
import SpellCheckManager from './aceEditor/spell-check/SpellCheckManager'
import SpellCheckAdapter from './aceEditor/spell-check/SpellCheckAdapter'
import HighlightsManager from './aceEditor/highlights/HighlightsManager'
import CursorPositionManager from './aceEditor/cursor-position/CursorPositionManager'
import CursorPositionAdapter from './aceEditor/cursor-position/CursorPositionAdapter'
import TrackChangesManager from './aceEditor/track-changes/TrackChangesManager'
import TrackChangesAdapter from './aceEditor/track-changes/TrackChangesAdapter'
import MetadataManager from './aceEditor/metadata/MetadataManager'
import 'ace/ace'
import 'ace/ext-searchbox'
import 'ace/ext-modelist'
import 'ace/keybinding-vim'
import '../../metadata/services/metadata'
import '../../graphics/services/graphics'
import '../../preamble/services/preamble'
import '../../files/services/files'
let syntaxValidationEnabled
const { EditSession } = ace.require('ace/edit_session')
const ModeList = ace.require('ace/ext/modelist')
const { Vim } = ace.require('ace/keyboard/vim')
const SearchBox = ace.require('ace/ext/searchbox')

// Set the base path that ace will fetch modes/snippets/workers from
if (window.aceBasePath !== '') {
  syntaxValidationEnabled = true
  ace.config.set('basePath', `${window.aceBasePath}`)
} else {
  syntaxValidationEnabled = false
}

// By default, don't use workers - enable them per-session as required
ace.config.setDefaultValue('session', 'useWorker', false)

// Ace loads its script itself, so we need to hook in to be able to clear
// the cache.
if (ace.config._moduleUrl == null) {
  ace.config._moduleUrl = ace.config.moduleUrl
  ace.config.moduleUrl = function(...args) {
    const url = ace.config._moduleUrl(...Array.from(args || []))
    return url
  }
}

App.directive('aceEditor', function(
  ide,
  $timeout,
  $compile,
  $rootScope,
  eventTracking,
  localStorage,
  $cacheFactory,
  metadata,
  graphics,
  preamble,
  files,
  $http,
  $q,
  $window
) {
  monkeyPatchSearch($rootScope, $compile)

  return {
    scope: {
      theme: '=',
      showPrintMargin: '=',
      keybindings: '=',
      fontSize: '=',
      autoComplete: '=',
      autoPairDelimiters: '=',
      sharejsDoc: '=',
      spellCheck: '=',
      spellCheckLanguage: '=',
      highlights: '=',
      text: '=',
      readOnly: '=',
      annotations: '=',
      navigateHighlights: '=',
      fileName: '=',
      onCtrlEnter: '=', // Compile
      onCtrlJ: '=', // Toggle the review panel
      onCtrlShiftC: '=', // Add a new comment
      onCtrlShiftA: '=', // Toggle track-changes on/off
      onSave: '=', // Cmd/Ctrl-S or :w in Vim
      syntaxValidation: '=',
      reviewPanel: '=',
      eventsBridge: '=',
      trackChanges: '=',
      docId: '=',
      rendererData: '=',
      lineHeight: '=',
      fontFamily: '='
    },
    link(scope, element, attrs) {
      // Don't freak out if we're already in an apply callback
      let spellCheckManager
      scope.$originalApply = scope.$apply
      scope.$apply = function(fn) {
        if (fn == null) {
          fn = function() {}
        }
        const phase = this.$root.$$phase
        if (phase === '$apply' || phase === '$digest') {
          return fn()
        } else {
          return this.$originalApply(fn)
        }
      }

      const editor = ace.edit(element.find('.ace-editor-body')[0])
      editor.$blockScrolling = Infinity

      // Besides the main editor, other elements will re-use this directive
      //  for displaying read-only content -- e.g. the history panes.
      const editorAcceptsChanges = attrs.aceEditor === 'editor'
      if (editorAcceptsChanges) {
        // end-to-end check for edits -> acks, globally on any doc
        // This may catch a missing attached ShareJsDoc that in turn bails out
        //  on missing acks.
        ide.globalEditorWatchdogManager.attachToEditor('Ace', editor)
      }

      // auto-insertion of braces, brackets, dollars
      editor.setOption('behavioursEnabled', scope.autoPairDelimiters || false)
      editor.setOption('wrapBehavioursEnabled', false)

      scope.$watch('autoPairDelimiters', autoPairDelimiters => {
        if (autoPairDelimiters) {
          return editor.setOption('behavioursEnabled', true)
        } else {
          return editor.setOption('behavioursEnabled', false)
        }
      })

      if (!window._debug_editors) {
        window._debug_editors = []
      }
      window._debug_editors.push(editor)

      scope.name = attrs.aceEditor

      if (scope.spellCheck) {
        // only enable spellcheck when explicitly required
        spellCheckManager = new SpellCheckManager(
          scope,
          $cacheFactory,
          $http,
          $q,
          new SpellCheckAdapter(editor)
        )
      }

      /* eslint-disable no-unused-vars */
      const undoManager = new UndoManager(editor)
      const highlightsManager = new HighlightsManager(scope, editor, element)
      const cursorPositionManager = new CursorPositionManager(
        scope,
        new CursorPositionAdapter(editor),
        localStorage
      )
      const trackChangesManager = new TrackChangesManager(
        scope,
        editor,
        element,
        new TrackChangesAdapter(editor)
      )

      const metadataManager = new MetadataManager(
        scope,
        editor,
        element,
        metadata
      )
      const autoCompleteManager = new AutoCompleteManager(
        scope,
        editor,
        element,
        metadataManager,
        graphics,
        preamble,
        files
      )

      // prevent user entering null and non-BMP unicode characters in Ace
      const BAD_CHARS_REGEXP = /[\0\uD800-\uDFFF]/g
      const BAD_CHARS_REPLACEMENT_CHAR = '\uFFFD'
      // the 'exec' event fires for ace functions before they are executed.
      // you can modify the input or reject the event with e.preventDefault()
      editor.commands.on('exec', function(e) {
        // replace bad characters in paste content
        if (e.command && e.command.name === 'paste') {
          BAD_CHARS_REGEXP.lastIndex = 0 // reset stateful regexp for this usage
          if (e.args && BAD_CHARS_REGEXP.test(e.args.text)) {
            e.args.text = e.args.text.replace(
              BAD_CHARS_REGEXP,
              BAD_CHARS_REPLACEMENT_CHAR
            )
          }
        }
        // replace bad characters in keyboard input
        if (e.command && e.command.name === 'insertstring') {
          BAD_CHARS_REGEXP.lastIndex = 0 // reset stateful regexp for this usage
          if (e.args && BAD_CHARS_REGEXP.test(e.args)) {
            e.args = e.args.replace(
              BAD_CHARS_REGEXP,
              BAD_CHARS_REPLACEMENT_CHAR
            )
          }
        }
      })

      /* eslint-enable no-unused-vars */

      scope.$watch('onSave', function(callback) {
        if (callback != null) {
          Vim.defineEx('write', 'w', callback)
          editor.commands.addCommand({
            name: 'save',
            bindKey: {
              win: 'Ctrl-S',
              mac: 'Command-S'
            },
            exec: callback,
            readOnly: true
          })
          // Not technically 'save', but Ctrl-. recompiles in OL v1
          // so maintain compatibility
          return editor.commands.addCommand({
            name: 'recompile_v1',
            bindKey: {
              win: 'Ctrl-.',
              mac: 'Ctrl-.'
            },
            exec: callback,
            readOnly: true
          })
        }
      })
      editor.commands.removeCommand('transposeletters')
      editor.commands.removeCommand('showSettingsMenu')
      editor.commands.removeCommand('foldall')

      // For European keyboards, the / is above 7 so needs Shift pressing.
      // This comes through as Command-Shift-/ on OS X, which is mapped to
      // toggleBlockComment.
      // This doesn't do anything for LaTeX, so remap this to togglecomment to
      // work for European keyboards as normal.
      // On Windows, the key combo comes as Ctrl-Shift-7.
      editor.commands.removeCommand('toggleBlockComment')
      editor.commands.removeCommand('togglecomment')

      editor.commands.addCommand({
        name: 'togglecomment',
        bindKey: {
          win: 'Ctrl-/|Ctrl-Shift-7',
          mac: 'Command-/|Command-Shift-/'
        },
        exec(editor) {
          return editor.toggleCommentLines()
        },
        multiSelectAction: 'forEachLine',
        scrollIntoView: 'selectionPart'
      })

      // Trigger search AND replace on CMD+F
      editor.commands.addCommand({
        name: 'find',
        bindKey: {
          win: 'Ctrl-F',
          mac: 'Command-F'
        },
        exec(editor) {
          return SearchBox.Search(editor, true)
        },
        readOnly: true
      })

      // Bold text on CMD+B
      editor.commands.addCommand({
        name: 'bold',
        bindKey: {
          win: 'Ctrl-B',
          mac: 'Command-B'
        },
        exec(editor) {
          const selection = editor.getSelection()
          if (selection.isEmpty()) {
            editor.insert('\\textbf{}')
            return editor.navigateLeft(1)
          } else {
            const text = editor.getCopyText()
            return editor.insert(`\\textbf{${text}}`)
          }
        },
        readOnly: false
      })

      // Italicise text on CMD+I
      editor.commands.addCommand({
        name: 'italics',
        bindKey: {
          win: 'Ctrl-I',
          mac: 'Command-I'
        },
        exec(editor) {
          const selection = editor.getSelection()
          if (selection.isEmpty()) {
            editor.insert('\\textit{}')
            return editor.navigateLeft(1)
          } else {
            const text = editor.getCopyText()
            return editor.insert(`\\textit{${text}}`)
          }
        },
        readOnly: false
      })

      scope.$watch('onCtrlEnter', function(callback) {
        if (callback != null) {
          return editor.commands.addCommand({
            name: 'compile',
            bindKey: {
              win: 'Ctrl-Enter',
              mac: 'Command-Enter'
            },
            exec: editor => {
              return callback()
            },
            readOnly: true
          })
        }
      })

      scope.$watch('onCtrlJ', function(callback) {
        if (callback != null) {
          return editor.commands.addCommand({
            name: 'toggle-review-panel',
            bindKey: {
              win: 'Ctrl-J',
              mac: 'Command-J'
            },
            exec: editor => {
              return callback()
            },
            readOnly: true
          })
        }
      })

      scope.$watch('onCtrlShiftC', function(callback) {
        if (callback != null) {
          return editor.commands.addCommand({
            name: 'add-new-comment',
            bindKey: {
              win: 'Ctrl-Shift-C',
              mac: 'Command-Shift-C'
            },
            exec: editor => {
              return callback()
            },
            readOnly: true
          })
        }
      })

      scope.$watch('onCtrlShiftA', function(callback) {
        if (callback != null) {
          return editor.commands.addCommand({
            name: 'toggle-track-changes',
            bindKey: {
              win: 'Ctrl-Shift-A',
              mac: 'Command-Shift-A'
            },
            exec: editor => {
              return callback()
            },
            readOnly: true
          })
        }
      })

      // Make '/' work for search in vim mode.
      editor.showCommandLine = arg => {
        if (arg === '/') {
          return SearchBox.Search(editor, true)
        }
      }

      const getCursorScreenPosition = function() {
        const session = editor.getSession()
        const cursorPosition = session.selection.getCursor()
        const sessionPos = session.documentToScreenPosition(
          cursorPosition.row,
          cursorPosition.column
        )
        return (
          sessionPos.row * editor.renderer.lineHeight - session.getScrollTop()
        )
      }

      if (attrs.resizeOn != null) {
        for (let event of Array.from(attrs.resizeOn.split(','))) {
          scope.$on(event, function() {
            scope.$applyAsync(() => {
              const previousScreenPosition = getCursorScreenPosition()
              editor.resize()
              // Put cursor back to same vertical position on screen
              const newScreenPosition = getCursorScreenPosition()
              const session = editor.getSession()
              return session.setScrollTop(
                session.getScrollTop() +
                  newScreenPosition -
                  previousScreenPosition
              )
            })
          })
        }
      }

      scope.$on(`${scope.name}:set-scroll-size`, function(e, size) {
        // Make sure that the editor has enough scroll margin above and below
        // to scroll the review panel with the given size
        const marginTop = size.overflowTop
        const { maxHeight } = editor.renderer.layerConfig
        const marginBottom = Math.max(size.height - maxHeight, 0)
        return setScrollMargins(marginTop, marginBottom)
      })

      var setScrollMargins = function(marginTop, marginBottom) {
        let marginChanged = false
        if (editor.renderer.scrollMargin.top !== marginTop) {
          editor.renderer.scrollMargin.top = marginTop
          marginChanged = true
        }
        if (editor.renderer.scrollMargin.bottom !== marginBottom) {
          editor.renderer.scrollMargin.bottom = marginBottom
          marginChanged = true
        }
        if (marginChanged) {
          return editor.renderer.updateFull()
        }
      }

      const resetScrollMargins = () => setScrollMargins(0, 0)

      scope.$watch('theme', value => editor.setTheme(`ace/theme/${value}`))

      scope.$watch('showPrintMargin', value => editor.setShowPrintMargin(value))

      scope.$watch('keybindings', function(value) {
        if (['vim', 'emacs'].includes(value)) {
          return editor.setKeyboardHandler(`ace/keyboard/${value}`)
        } else {
          return editor.setKeyboardHandler(null)
        }
      })

      scope.$watch('fontSize', value =>
        element.find('.ace_editor, .ace_content').css({
          'font-size': value + 'px'
        })
      )

      scope.$watch('fontFamily', function(value) {
        const monospaceFamilies = [
          'Monaco',
          'Menlo',
          'Ubuntu Mono',
          'Consolas',
          'monospace'
        ]

        if (value != null) {
          switch (value) {
            case 'monaco':
              return editor.setOption(
                'fontFamily',
                monospaceFamilies.join(', ')
              )
            case 'lucida':
              return editor.setOption(
                'fontFamily',
                '"Lucida Console", "Source Code Pro", monospace'
              )
            default:
              return editor.setOption('fontFamily', null)
          }
        }
      })

      scope.$watch('lineHeight', function(value) {
        if (value != null) {
          switch (value) {
            case 'compact':
              editor.container.style.lineHeight = 1.33
              break
            case 'normal':
              editor.container.style.lineHeight = 1.6
              break
            case 'wide':
              editor.container.style.lineHeight = 2
              break
            default:
              editor.container.style.lineHeight = 1.6
          }
          return editor.renderer.updateFontSize()
        }
      })

      scope.$watch('sharejsDoc', function(sharejs_doc, old_sharejs_doc) {
        if (old_sharejs_doc != null) {
          scope.$broadcast('beforeChangeDocument')
          detachFromAce(old_sharejs_doc)
        }
        if (sharejs_doc != null) {
          attachToAce(sharejs_doc)
        }
        if (sharejs_doc != null && old_sharejs_doc != null) {
          return scope.$broadcast('afterChangeDocument')
        }
      })

      scope.$watch('text', function(text) {
        if (text != null) {
          editor.setValue(text, -1)
          const session = editor.getSession()
          return session.setUseWrapMode(true)
        }
      })

      scope.$watch('annotations', function(annotations) {
        const session = editor.getSession()
        return session.setAnnotations(annotations)
      })

      scope.$watch('readOnly', value => editor.setReadOnly(!!value))

      scope.$watch('syntaxValidation', function(value) {
        // ignore undefined settings here
        // only instances of ace with an explicit value should set useWorker
        // the history instance will have syntaxValidation undefined
        if (value != null && syntaxValidationEnabled) {
          const session = editor.getSession()
          return session.setOption('useWorker', value)
        }
      })

      editor.setOption('scrollPastEnd', true)

      let updateCount = 0
      const onChange = function() {
        updateCount++

        if (updateCount === 100) {
          eventTracking.send('editor-interaction', 'multi-doc-update')
        }
        return scope.$emit(`${scope.name}:change`)
      }

      let currentFirstVisibleRow = null
      const emitMiddleVisibleRowChanged = () => {
        const firstVisibleRow = editor.getFirstVisibleRow()
        if (firstVisibleRow === currentFirstVisibleRow) return

        currentFirstVisibleRow = firstVisibleRow
        const lastVisibleRow = editor.getLastVisibleRow()
        scope.$emit(
          `scroll:editor:update`,
          Math.floor((firstVisibleRow + lastVisibleRow) / 2)
        )
      }

      const onScroll = function(scrollTop) {
        if (scope.eventsBridge == null) {
          return
        }
        const height = editor.renderer.layerConfig.maxHeight
        emitMiddleVisibleRowChanged()
        return scope.eventsBridge.emit('aceScroll', scrollTop, height)
      }

      const onScrollbarVisibilityChanged = function(event, vRenderer) {
        if (scope.eventsBridge == null) {
          return
        }
        return scope.eventsBridge.emit(
          'aceScrollbarVisibilityChanged',
          vRenderer.scrollBarV.isVisible,
          vRenderer.scrollBarV.width
        )
      }

      if (scope.eventsBridge != null) {
        editor.renderer.on(
          'scrollbarVisibilityChanged',
          onScrollbarVisibilityChanged
        )

        scope.eventsBridge.on('externalScroll', position =>
          editor.getSession().setScrollTop(position)
        )
        scope.eventsBridge.on('refreshScrollPosition', function() {
          const session = editor.getSession()
          session.setScrollTop(session.getScrollTop() + 1)
          return session.setScrollTop(session.getScrollTop() - 1)
        })
      }

      const onSessionChangeForSpellCheck = function(e) {
        spellCheckManager.onSessionChange()
        if (e.oldSession != null) {
          e.oldSession.getDocument().off('change', spellCheckManager.onChange)
        }
        e.session.getDocument().on('change', spellCheckManager.onChange)
        if (e.oldSession != null) {
          e.oldSession.off('changeScrollTop', spellCheckManager.onScroll)
        }
        return e.session.on('changeScrollTop', spellCheckManager.onScroll)
      }

      const initSpellCheck = function() {
        if (!spellCheckManager) return
        spellCheckManager.init()
        editor.on('changeSession', onSessionChangeForSpellCheck)
        onSessionChangeForSpellCheck({
          session: editor.getSession()
        }) // Force initial setup
        return editor.on('nativecontextmenu', spellCheckManager.onContextMenu)
      }

      const tearDownSpellCheck = function() {
        if (!spellCheckManager) return
        editor.off('changeSession', onSessionChangeForSpellCheck)
        return editor.off('nativecontextmenu', spellCheckManager.onContextMenu)
      }

      const initTrackChanges = function() {
        trackChangesManager.rangesTracker = scope.sharejsDoc.ranges

        // Force onChangeSession in order to set up highlights etc.
        trackChangesManager.onChangeSession()

        if (!trackChangesManager) return
        editor.on('changeSelection', trackChangesManager.onChangeSelection)

        // Selection also moves with updates elsewhere in the document
        editor.on('change', trackChangesManager.onChangeSelection)

        editor.on('changeSession', trackChangesManager.onChangeSession)
        editor.on('cut', trackChangesManager.onCut)
        editor.on('paste', trackChangesManager.onPaste)
        editor.renderer.on('resize', trackChangesManager.onResize)
      }

      const tearDownTrackChanges = function() {
        if (!trackChangesManager) return
        trackChangesManager.tearDown()
        editor.off('changeSelection', trackChangesManager.onChangeSelection)

        editor.off('change', trackChangesManager.onChangeSelection)
        editor.off('changeSession', trackChangesManager.onChangeSession)
        editor.off('cut', trackChangesManager.onCut)
        editor.off('paste', trackChangesManager.onPaste)
        editor.renderer.off('resize', trackChangesManager.onResize)
      }

      const initUndo = function() {
        // Emulate onChangeSession event. Note: listening to changeSession
        // event is unnecessary since this method is called when we switch
        // sessions (via ShareJS changing) anyway
        undoManager.onChangeSession(editor.getSession())
        editor.on('change', undoManager.onChange)
      }

      const tearDownUndo = function() {
        editor.off('change', undoManager.onChange)
      }

      const onSessionChangeForCursorPosition = function(e) {
        if (e.oldSession != null) {
          e.oldSession.selection.off(
            'changeCursor',
            cursorPositionManager.onCursorChange
          )
        }
        return e.session.selection.on(
          'changeCursor',
          cursorPositionManager.onCursorChange
        )
      }

      const onUnloadForCursorPosition = () =>
        cursorPositionManager.onUnload(editor.getSession())

      const initCursorPosition = function() {
        editor.on('changeSession', onSessionChangeForCursorPosition)

        // Force initial setup
        onSessionChangeForCursorPosition({ session: editor.getSession() })

        return $(window).on('unload', onUnloadForCursorPosition)
      }

      const tearDownCursorPosition = function() {
        editor.off('changeSession', onSessionChangeForCursorPosition)
        return $(window).off('unload', onUnloadForCursorPosition)
      }

      initCursorPosition()

      // Trigger the event once *only* - this is called after Ace is connected
      // to the ShareJs instance but this event should only be triggered the
      // first time the editor is opened. Not every time the docs opened
      const triggerEditorInitEvent = _.once(() =>
        scope.$broadcast('editorInit')
      )

      var attachToAce = function(sharejs_doc) {
        let mode
        const lines = sharejs_doc.getSnapshot().split('\n')
        let session = editor.getSession()
        if (session != null) {
          session.destroy()
        }

        // see if we can lookup a suitable mode from ace
        // but fall back to text by default
        try {
          if (/\.(Rtex|bbl|tikz)$/i.test(scope.fileName)) {
            // recognise Rtex and bbl as latex
            mode = 'ace/mode/latex'
          } else if (/\.(sty|cls|clo)$/.test(scope.fileName)) {
            // recognise some common files as tex
            mode = 'ace/mode/tex'
          } else {
            ;({ mode } = ModeList.getModeForPath(scope.fileName))
            // we prefer plain_text mode over text mode because ace's
            // text mode is actually for code and has unwanted
            // indenting (see wrapMethod in ace edit_session.js)
            if (mode === 'ace/mode/text') {
              mode = 'ace/mode/plain_text'
            }
          }
        } catch (error) {
          mode = 'ace/mode/plain_text'
        }

        // create our new session
        session = new EditSession(lines, mode)

        session.setUseWrapMode(true)
        // use syntax validation only when explicitly set
        if (
          scope.syntaxValidation != null &&
          syntaxValidationEnabled &&
          !/\.bib$/.test(scope.fileName)
        ) {
          session.setOption('useWorker', scope.syntaxValidation)
        }

        // set to readonly until document change handlers are attached
        editor.setReadOnly(true)

        // now attach session to editor
        editor.setSession(session)

        const doc = session.getDocument()
        doc.on('change', onChange)

        editor.initing = true
        sharejs_doc.attachToAce(editor)
        editor.initing = false

        // now ready to edit document
        // respect the readOnly setting, normally false
        editor.setReadOnly(scope.readOnly)
        triggerEditorInitEvent()

        if (!scope.readOnly) {
          initSpellCheck()
        }

        initTrackChanges()
        initUndo()

        resetScrollMargins()

        // need to set annotations after attaching because attaching
        // deletes and then inserts document content
        session.setAnnotations(scope.annotations)

        session.on('changeScrollTop', eventTracking.editingSessionHeartbeat)

        angular
          .element($window)
          .on('click', eventTracking.editingSessionHeartbeat)

        scope.$on('$destroy', () =>
          angular
            .element($window)
            .off('click', eventTracking.editingSessionHeartbeat)
        )

        if (scope.eventsBridge != null) {
          session.on('changeScrollTop', onScroll)
        }

        $rootScope.hasLintingError = false
        session.on('changeAnnotation', function() {
          // Both linter errors and compile logs are set as error annotations,
          // however when the user types something, the compile logs are
          // replaced with linter errors. When we check for lint errors before
          // autocompile we are guaranteed to get linter errors
          const hasErrors =
            session
              .getAnnotations()
              .filter(annotation => annotation.type !== 'info').length > 0

          if ($rootScope.hasLintingError !== hasErrors) {
            return ($rootScope.hasLintingError = hasErrors)
          }
        })

        setTimeout(() =>
          // Let any listeners init themselves
          onScroll(editor.renderer.getScrollTop())
        )

        return editor.focus()
      }

      var detachFromAce = function(sharejs_doc) {
        tearDownSpellCheck()
        tearDownTrackChanges()
        tearDownUndo()
        sharejs_doc.detachFromAce()
        sharejs_doc.off('remoteop.recordRemote')

        const session = editor.getSession()
        session.off('changeScrollTop')

        const doc = session.getDocument()
        return doc.off('change', onChange)
      }

      if (scope.rendererData != null) {
        editor.renderer.on('changeCharacterSize', () => {
          scope.$apply(
            () => (scope.rendererData.lineHeight = editor.renderer.lineHeight)
          )
        })
      }

      scope.$watch('rendererData', function(rendererData) {
        if (rendererData != null) {
          return (rendererData.lineHeight = editor.renderer.lineHeight)
        }
      })

      scope.$on('$destroy', function() {
        if (scope.sharejsDoc != null) {
          scope.$broadcast('changeEditor')
          tearDownSpellCheck()
          tearDownCursorPosition()
          tearDownUndo()
          detachFromAce(scope.sharejsDoc)
          const session = editor.getSession()
          if (session != null) {
            session.destroy()
          }
          return scope.eventsBridge.emit(
            'aceScrollbarVisibilityChanged',
            false,
            0
          )
        }
      })

      return scope.$emit(`${scope.name}:inited`, editor)
    },

    template: `\
<div class="ace-editor-wrapper">
<div
  class="undo-conflict-warning alert alert-danger small"
  ng-show="undo.show_remote_warning"
>
  <strong>Watch out!</strong>
  We had to undo some of your collaborators changes before we could undo yours.
  <a
    href="#"
    class="pull-right"
    ng-click="undo.show_remote_warning = false"
  >Dismiss</a>
</div>
<div class="ace-editor-body"></div>
<spell-menu
  open="spellMenu.open"
  top="spellMenu.top"
  left="spellMenu.left"
  layout-from-bottom="spellMenu.layoutFromBottom"
  highlight="spellMenu.highlight"
  replace-word="replaceWord(highlight, suggestion)"
  learn-word="learnWord(highlight)"
></spell-menu>
<div
  class="annotation-label"
  ng-show="annotationLabel.show"
  ng-style="{
    position: 'absolute',
    left:     annotationLabel.left,
    right:    annotationLabel.right,
    bottom:   annotationLabel.bottom,
    top:      annotationLabel.top,
    'background-color': annotationLabel.backgroundColor
  }"
>
  {{ annotationLabel.text }}
</div>

<a
  href
  class="highlights-before-label btn btn-info btn-xs"
  ng-show="updateLabels.highlightsBefore > 0"
  ng-click="gotoHighlightAbove()"
>
  <i class="fa fa-fw fa-arrow-up"></i>
  {{ updateLabels.highlightsBefore }} more update{{ updateLabels.highlightsBefore > 1 && "" || "s" }} above
</a>

<a
  href
  class="highlights-after-label btn btn-info btn-xs"
  ng-show="updateLabels.highlightsAfter > 0"
  ng-click="gotoHighlightBelow()"
>
  <i class="fa fa-fw fa-arrow-down"></i>
  {{ updateLabels.highlightsAfter }} more update{{ updateLabels.highlightsAfter > 1 && "" || "s" }} below

</a>
</div>\
`
  }
})

function monkeyPatchSearch($rootScope, $compile) {
  const searchHtml = `\
<div class="ace_search right">
<a href type="button" action="hide" class="ace_searchbtn_close">
  <i class="fa fa-fw fa-times"></i>
</a>
<div class="ace_search_form">
  <input class="ace_search_field form-control input-sm" placeholder="Search for" spellcheck="false"></input>
  <div class="btn-group">
    <button type="button" action="findNext" class="ace_searchbtn next btn btn-default btn-sm">
      <i class="fa fa-chevron-down fa-fw"></i>
    </button>
    <button type="button" action="findPrev" class="ace_searchbtn prev btn btn-default btn-sm">
      <i class="fa fa-chevron-up fa-fw"></i>
    </button>
  </div>
</div>
<div class="ace_replace_form">
  <input class="ace_search_field form-control input-sm" placeholder="Replace with" spellcheck="false"></input>
  <div class="btn-group">
    <button type="button" action="replaceAndFindNext" class="ace_replacebtn btn btn-default btn-sm">Replace</button>
    <button type="button" action="replaceAll" class="ace_replacebtn btn btn-default btn-sm">All</button>
  </div>
</div>
<div class="ace_search_options">
  <div class="btn-group">
    <button action="toggleRegexpMode" class="btn btn-default btn-sm" tooltip-placement="bottom" tooltip-append-to-body="true" tooltip="RegExp Search">.*</button>
    <button action="toggleCaseSensitive" class="btn btn-default btn-sm" tooltip-placement="bottom" tooltip-append-to-body="true" tooltip="CaseSensitive Search">Aa</button>
    <button action="toggleWholeWords" class="btn btn-default btn-sm" tooltip-placement="bottom" tooltip-append-to-body="true" tooltip="Whole Word Search">"..."</button>
    <button action="searchInSelection" class="btn btn-default btn-sm" tooltip-placement="bottom" tooltip-append-to-body="true" tooltip="Search Within Selection"><i class="fa fa-align-left"></i></button>
  </div>
  <span class="ace_search_counter"></span>
</div>
<div action="toggleReplace" class="hidden"></div>
</div>\
`

  // Remove Ace CSS
  $('#ace_searchbox').remove()

  const SB = SearchBox.SearchBox
  const { $init } = SB.prototype
  SB.prototype.$init = function() {
    this.element = $compile(searchHtml)($rootScope.$new())[0]
    return $init.apply(this)
  }
}