feat: add setting for line wrapping

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

frontend/locales/en.json

@@ -612,6 +612,10 @@
       "syncScroll": {
         "label": "Sync Scrolling",
         "help": "Synchronizes the scroll state of editor and rendering view."
+      },
+      "lineWrapping": {
+        "label": "Line Wrapping",
+        "help": "Breaks long lines so they're visible without scrolling."
       }
     },
     "global": {

frontend/src/components/editor-page/editor-pane/editor-pane.tsx

@@ -12,6 +12,7 @@ import type { ScrollProps } from '../synced-scroll/scroll-props'
 import styles from './extended-codemirror/codemirror.module.scss'
 import { useCodeMirrorAutocompletionsExtension } from './hooks/codemirror-extensions/use-code-mirror-autocompletions-extension'
 import { useCodeMirrorFileInsertExtension } from './hooks/codemirror-extensions/use-code-mirror-file-insert-extension'
+import { useCodeMirrorLineWrappingExtension } from './hooks/codemirror-extensions/use-code-mirror-line-wrapping-extension'
 import { useCodeMirrorRemoteCursorsExtension } from './hooks/codemirror-extensions/use-code-mirror-remote-cursor-extensions'
 import { useCodeMirrorScrollWatchExtension } from './hooks/codemirror-extensions/use-code-mirror-scroll-watch-extension'
 import { useCodeMirrorSpellCheckExtension } from './hooks/codemirror-extensions/use-code-mirror-spell-check-extension'
@@ -38,7 +39,6 @@ import { markdown, markdownLanguage } from '@codemirror/lang-markdown'
 import { languages } from '@codemirror/language-data'
 import { lintGutter } from '@codemirror/lint'
 import { oneDark } from '@codemirror/theme-one-dark'
-import { EditorView } from '@codemirror/view'
 import ReactCodeMirror from '@uiw/react-codemirror'
 import React, { useEffect, useMemo } from 'react'
 import { useTranslation } from 'react-i18next'
@@ -66,6 +66,7 @@ export const EditorPane: React.FC<EditorPaneProps> = ({ scrollState, onScroll, o
   const tablePasteExtensions = useCodeMirrorTablePasteExtension()
   const fileInsertExtension = useCodeMirrorFileInsertExtension()
   const spellCheckExtension = useCodeMirrorSpellCheckExtension()
+  const lineWrappingExtension = useCodeMirrorLineWrappingExtension()
   const cursorActivityExtension = useCursorActivityCallback()
   const autoCompletionExtension = useCodeMirrorAutocompletionsExtension()
 
@@ -94,7 +95,7 @@ export const EditorPane: React.FC<EditorPaneProps> = ({ scrollState, onScroll, o
         codeLanguages: (input) => findLanguageByCodeBlockName(languages, input)
       }),
       remoteCursorsExtension,
-      EditorView.lineWrapping,
+      lineWrappingExtension,
       editorScrollExtension,
       tablePasteExtensions,
       fileInsertExtension,
@@ -114,7 +115,8 @@ export const EditorPane: React.FC<EditorPaneProps> = ({ scrollState, onScroll, o
       cursorActivityExtension,
       updateViewContextExtension,
       yjsExtension,
-      spellCheckExtension
+      spellCheckExtension,
+      lineWrappingExtension
     ]
   )
 

frontend/src/components/editor-page/editor-pane/hooks/codemirror-extensions/use-code-mirror-line-wrapping-extension.ts

@@ -0,0 +1,18 @@
+/*
+ * SPDX-FileCopyrightText: 2023 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { useApplicationState } from '../../../../../hooks/common/use-application-state'
+import type { Extension } from '@codemirror/state'
+import { EditorView } from '@codemirror/view'
+import { useMemo } from 'react'
+
+/**
+ * Creates a {@link Extension codemirror extension} that activates or deactivates line wrapping.
+ */
+export const useCodeMirrorLineWrappingExtension = (): Extension => {
+  const lineWrapping = useApplicationState((state) => state.editorConfig.lineWrapping)
+
+  return useMemo(() => (lineWrapping ? EditorView.lineWrapping : []), [lineWrapping])
+}

frontend/src/components/layout/settings-dialog/editor/editor-settings-tab-content.tsx

@@ -5,6 +5,7 @@
  */
 import { SettingLine } from '../utils/setting-line'
 import { LigatureSettingButtonGroup } from './ligature-setting-button-group'
+import { LineWrappingSettingButtonGroup } from './line-wrapping-setting-button-group'
 import { SmartPasteSettingButtonGroup } from './smart-paste-setting-button-group'
 import { SyncScrollSettingButtonGroup } from './sync-scroll-setting-button-group'
 import React from 'react'
@@ -28,6 +29,9 @@ export const EditorSettingsTabContent: React.FC = () => {
       <SettingLine i18nKey={'editor.syncScroll'}>
         <SyncScrollSettingButtonGroup />
       </SettingLine>
+      <SettingLine i18nKey={'editor.lineWrapping'}>
+        <LineWrappingSettingButtonGroup />
+      </SettingLine>
     </ListGroup>
   )
 }

frontend/src/components/layout/settings-dialog/editor/line-wrapping-setting-button-group.tsx

@@ -0,0 +1,17 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { useApplicationState } from '../../../../hooks/common/use-application-state'
+import { setEditorLineWrapping } from '../../../../redux/editor/methods'
+import { OnOffButtonGroup } from '../utils/on-off-button-group'
+import React from 'react'
+
+/**
+ * Allows to change if line wrapping should be used or not in the editor.
+ */
+export const LineWrappingSettingButtonGroup: React.FC = () => {
+  const enabled = useApplicationState((state) => state.editorConfig.lineWrapping)
+  return <OnOffButtonGroup value={enabled} onSelect={setEditorLineWrapping} />
+}

frontend/src/redux/editor/methods.ts

@@ -8,6 +8,7 @@ import { Logger } from '../../utils/logger'
 import type {
   EditorConfig,
   SetEditorLigaturesAction,
+  SetEditorLineWrappingAction,
   SetEditorSmartPasteAction,
   SetEditorSyncScrollAction
 } from './types'
@@ -44,6 +45,14 @@ export const setEditorSyncScroll = (syncScroll: boolean): void => {
   store.dispatch(action)
 }
 
+export const setEditorLineWrapping = (lineWrapping: boolean): void => {
+  const action: SetEditorLineWrappingAction = {
+    type: EditorConfigActionType.SET_LINE_WRAPPING,
+    lineWrapping
+  }
+  store.dispatch(action)
+}
+
 export const setEditorLigatures = (ligatures: boolean): void => {
   const action: SetEditorLigaturesAction = {
     type: EditorConfigActionType.SET_LIGATURES,

frontend/src/redux/editor/reducers.ts

@@ -12,7 +12,8 @@ const initialState: EditorConfig = {
   ligatures: true,
   syncScroll: true,
   smartPaste: true,
-  spellCheck: false
+  spellCheck: false,
+  lineWrapping: true
 }
 
 const getInitialState = (): EditorConfig => {
@@ -53,6 +54,13 @@ export const EditorConfigReducer: Reducer<EditorConfig, EditorConfigActions> = (
       }
       saveToLocalStorage(newState)
       return newState
+    case EditorConfigActionType.SET_LINE_WRAPPING:
+      newState = {
+        ...state,
+        lineWrapping: action.lineWrapping
+      }
+      saveToLocalStorage(newState)
+      return newState
     default:
       return state
   }

frontend/src/redux/editor/types.ts

@@ -9,6 +9,7 @@ export enum EditorConfigActionType {
   SET_EDITOR_VIEW_MODE = 'editor/view-mode/set',
   SET_SYNC_SCROLL = 'editor/syncScroll/set',
   SET_LIGATURES = 'editor/preferences/setLigatures',
+  SET_LINE_WRAPPING = 'editor/preferences/setLineWrapping',
   SET_SMART_PASTE = 'editor/preferences/setSmartPaste',
   SET_SPELL_CHECK = 'editor/preferences/setSpellCheck'
 }
@@ -18,14 +19,21 @@ export interface EditorConfig {
   ligatures: boolean
   smartPaste: boolean
   spellCheck: boolean
+  lineWrapping: boolean
 }
 
 export type EditorConfigActions =
   | SetEditorSyncScrollAction
   | SetEditorLigaturesAction
   | SetEditorSmartPasteAction
+  | SetEditorLineWrappingAction
   | SetSpellCheckAction
 
+export interface SetEditorLineWrappingAction extends Action<EditorConfigActionType> {
+  type: EditorConfigActionType.SET_LINE_WRAPPING
+  lineWrapping: boolean
+}
+
 export interface SetEditorSyncScrollAction extends Action<EditorConfigActionType> {
   type: EditorConfigActionType.SET_SYNC_SCROLL
   syncScroll: boolean