Merge branch 'fix/96693-chinese-modal-text' into fix/96705-implement

packages/app/src/client/legacy/crowi.js

@@ -12,38 +12,8 @@ if (!window) {
 }
 window.Crowi = Crowi;
 
-/**
- * set 'data-caret-line' attribute that will be processed when 'shown.bs.tab' event fired
- * @param {number} line
- */
-Crowi.setCaretLineData = function(line) {
-  const { appContainer } = window;
-  const pageEditorDom = document.querySelector('#page-editor');
-  pageEditorDom.setAttribute('data-caret-line', line);
-};
-
-/**
- * invoked when;
- *
- * 1. 'shown.bs.tab' event fired
- */
-Crowi.setCaretLineAndFocusToEditor = function() {
-  // get 'data-caret-line' attributes
-  const pageEditorDom = document.querySelector('#page-editor');
-
-  if (pageEditorDom == null) {
-    return;
-  }
-
-  const { appContainer } = window;
-  const editorContainer = appContainer.getContainer('EditorContainer');
-  const line = pageEditorDom.getAttribute('data-caret-line') || 0;
-  editorContainer.setCaretLine(+line);
-  // reset data-caret-line attribute
-  pageEditorDom.removeAttribute('data-caret-line');
-
-  // focus
-  editorContainer.focusToEditor();
+Crowi.setCaretLine = function(line) {
+  window.globalEmitter.emit('setCaretLine', line);
 };
 
 // original: middleware.swigFilter
@@ -55,39 +25,6 @@ Crowi.userPicture = function(user) {
   return user.image || '/images/icons/user.svg';
 };
 
-Crowi.modifyScrollTop = function() {
-  const offset = 10;
-
-  const hash = window.location.hash;
-  if (hash === '') {
-    return;
-  }
-
-  const pageHeader = document.querySelector('#page-header');
-  if (!pageHeader) {
-    return;
-  }
-  const pageHeaderRect = pageHeader.getBoundingClientRect();
-
-  const sectionHeader = Crowi.findSectionHeader(hash);
-  if (sectionHeader === null) {
-    return;
-  }
-
-  let timeout = 0;
-  if (window.scrollY === 0) {
-    timeout = 200;
-  }
-  setTimeout(() => {
-    const sectionHeaderRect = sectionHeader.getBoundingClientRect();
-    if (sectionHeaderRect.top >= pageHeaderRect.bottom) {
-      return;
-    }
-
-    window.scrollTo(0, (window.scrollY - pageHeaderRect.height - offset));
-  }, timeout);
-};
-
 Crowi.initClassesByOS = function() {
   // add classes to cmd-key by OS
   const platform = navigator.platform.toLowerCase();
@@ -112,63 +49,6 @@ Crowi.initClassesByOS = function() {
   });
 };
 
-window.addEventListener('load', () => {
-  const crowi = window.crowi;
-  if (crowi && crowi.users && crowi.users.length !== 0) {
-    const totalUsers = crowi.users.length;
-    const $listLiker = $('.page-list-liker');
-    $listLiker.each((i, liker) => {
-      const count = $(liker).data('count') || 0;
-      if (count / totalUsers > 0.05) {
-        $(liker).addClass('popular-page-high');
-        // 5%
-      }
-      else if (count / totalUsers > 0.02) {
-        $(liker).addClass('popular-page-mid');
-        // 2%
-      }
-      else if (count / totalUsers > 0.005) {
-        $(liker).addClass('popular-page-low');
-        // 0.5%
-      }
-    });
-    const $listSeer = $('.page-list-seer');
-    $listSeer.each((i, seer) => {
-      const count = $(seer).data('count') || 0;
-      if (count / totalUsers > 0.10) {
-        // 10%
-        $(seer).addClass('popular-page-high');
-      }
-      else if (count / totalUsers > 0.05) {
-        // 5%
-        $(seer).addClass('popular-page-mid');
-      }
-      else if (count / totalUsers > 0.02) {
-        // 2%
-        $(seer).addClass('popular-page-low');
-      }
-    });
-  }
-
-  blinkSectionHeaderAtBoot();
-
-  Crowi.modifyScrollTop();
-  Crowi.initClassesByOS();
-});
-
-window.addEventListener('hashchange', (e) => {
-  Crowi.modifyScrollTop();
-
-  // hash on page
-  if (window.location.hash) {
-    if (window.location.hash === '#edit') {
-      Crowi.setCaretLineAndFocusToEditor();
-    }
-    // else if (window.location.hash === '#hackmd') {
-    // }
-  }
-});
-
 // adjust min-height of page for print temporarily
 window.onbeforeprint = function() {
   $('#page-wrapper').css('min-height', '0px');

packages/app/src/client/services/AppContainer.js

@@ -143,10 +143,6 @@ export default class AppContainer extends Container {
       throw new Error('The specified instance must not be null');
     }
 
-    if (this.componentInstances[id] != null) {
-      throw new Error('The specified instance couldn\'t register because the same id has already been registered');
-    }
-
     this.componentInstances[id] = instance;
   }
 

packages/app/src/client/services/EditorContainer.js

@@ -59,20 +59,6 @@ export default class EditorContainer extends Container {
     }
   }
 
-  setCaretLine(line) {
-    const pageEditor = this.appContainer.getComponentInstance('PageEditor');
-    if (pageEditor != null) {
-      pageEditor.setCaretLine(line);
-    }
-  }
-
-  focusToEditor() {
-    const pageEditor = this.appContainer.getComponentInstance('PageEditor');
-    if (pageEditor != null) {
-      pageEditor.focusToEditor();
-    }
-  }
-
   getCurrentOptionsToSave() {
     const opt = {
       pageTags: this.state.tags,

packages/app/src/client/services/PageContainer.js

@@ -217,13 +217,11 @@ export default class PageContainer extends Container {
     }
     this.setState(newState);
 
-    // PageEditor component
-    const pageEditor = this.appContainer.getComponentInstance('PageEditor');
-    if (pageEditor != null) {
-      if (editorMode !== EditorMode.Editor) {
-        pageEditor.updateEditorValue(newState.markdown);
-      }
+    // Update PageEditor component
+    if (editorMode !== EditorMode.Editor) {
+      window.globalEmitter.emit('updateEditorValue', newState.markdown);
     }
+
     // PageEditorByHackmd component
     const pageEditorByHackmd = this.appContainer.getComponentInstance('PageEditorByHackmd');
     if (pageEditorByHackmd != null) {
@@ -271,7 +269,7 @@ export default class PageContainer extends Container {
     let { revisionId } = this.state;
     const options = Object.assign({}, optionsToSave);
 
-    if (editorMode === 'hackmd') {
+    if (editorMode === EditorMode.HackMD) {
       // set option to sync
       options.isSyncRevisionToHackmd = true;
       revisionId = this.state.revisionIdHackmdSynced;
@@ -306,7 +304,7 @@ export default class PageContainer extends Container {
     const options = Object.assign({}, optionsToSave);
 
     let markdown;
-    if (editorMode === 'hackmd') {
+    if (editorMode === EditorMode.HackMD) {
       const pageEditorByHackmd = this.appContainer.getComponentInstance('PageEditorByHackmd');
       markdown = await pageEditorByHackmd.getMarkdown();
       // set option to sync
@@ -451,7 +449,6 @@ export default class PageContainer extends Container {
 
     const { pageId, remoteRevisionId, path } = this.state;
     const editorContainer = this.appContainer.getContainer('EditorContainer');
-    const pageEditor = this.appContainer.getComponentInstance('PageEditor');
     const options = editorContainer.getCurrentOptionsToSave();
     const optionsToSave = Object.assign({}, options);
 
@@ -460,8 +457,9 @@ export default class PageContainer extends Container {
     editorContainer.clearDraft(path);
     this.updateStateAfterSave(res.page, res.tags, res.revision, editorMode);
 
-    if (pageEditor != null) {
-      pageEditor.updateEditorValue(markdown);
+    // Update PageEditor component
+    if (editorMode !== EditorMode.Editor) {
+      window.globalEmitter.emit('updateEditorValue', markdown);
     }
 
     editorContainer.setState({ tags: res.tags });

packages/app/src/client/util/editor.ts

@@ -5,8 +5,8 @@ type OptionsToSave = {
   slackChannels: string;
   grant: number;
   pageTags: string[] | null;
-  grantUserGroupId: string | null;
-  grantUserGroupName: string | null;
+  grantUserGroupId?: string | null;
+  grantUserGroupName?: string | null;
 };
 
 // TODO: Remove editorContainer upon migration to SWR
@@ -14,8 +14,8 @@ export const getOptionsToSave = (
     isSlackEnabled: boolean,
     slackChannels: string,
     grant: number,
-    grantUserGroupId: string | null,
-    grantUserGroupName: string | null,
+    grantUserGroupId: string | null | undefined,
+    grantUserGroupName: string | null | undefined,
     editorContainer: EditorContainer,
 ): OptionsToSave => {
   const optionsToSave = editorContainer.getCurrentOptionsToSave();

packages/app/src/client/util/markdown-it/header-with-edit-link.js

@@ -7,7 +7,7 @@ export default class HeaderWithEditLinkConfigurer {
   configure(md) {
     md.renderer.rules.heading_close = (tokens, idx) => {
       return `<span class="revision-head-edit-button">
-                <a href="#edit" onClick="Crowi.setCaretLineData(parseInt(this.parentNode.parentNode.dataset.line, 10))">
+                <a href="#edit" onClick="Crowi.setCaretLine(parseInt(this.parentNode.parentNode.dataset.line, 10))">
                   <i class="icon-note"></i>
                 </a>
               </span></${tokens[idx].tag}>`;

packages/app/src/components/Page/DisplaySwitcher.tsx

@@ -7,10 +7,10 @@ import { TabContent, TabPane } from 'reactstrap';
 
 import { smoothScrollIntoView } from '~/client/util/smooth-scroll';
 import {
-  useCurrentPagePath, useIsSharedUser, useIsEditable, useCurrentPageId, useIsUserPage, usePageUser,
+  useCurrentPagePath, useIsSharedUser, useIsEditable, useCurrentPageId, useIsUserPage, usePageUser, useShareLinkId,
 } from '~/stores/context';
 import { useDescendantsPageListModal } from '~/stores/modal';
-import { useSWRxPageByPath } from '~/stores/page';
+import { useSWRxCurrentPage } from '~/stores/page';
 import { EditorMode, useEditorMode } from '~/stores/ui';
 
 import CountBadge from '../Common/CountBadge';
@@ -18,7 +18,7 @@ import ContentLinkButtons from '../ContentLinkButtons';
 import HashChanged from '../EventListeneres/HashChanged';
 import PageListIcon from '../Icons/PageListIcon';
 import Page from '../Page';
-import Editor from '../PageEditor';
+import PageEditor from '../PageEditor';
 import EditorNavbarBottom from '../PageEditor/EditorNavbarBottom';
 import PageEditorByHackmd from '../PageEditorByHackmd';
 import TableOfContents from '../TableOfContents';
@@ -41,10 +41,11 @@ const DisplaySwitcher = (): JSX.Element => {
   const { data: currentPageId } = useCurrentPageId();
   const { data: currentPath } = useCurrentPagePath();
   const { data: isSharedUser } = useIsSharedUser();
+  const { data: shareLinkId } = useShareLinkId();
   const { data: isUserPage } = useIsUserPage();
   const { data: isEditable } = useIsEditable();
   const { data: pageUser } = usePageUser();
-  const { data: currentPage } = useSWRxPageByPath(currentPath);
+  const { data: currentPage } = useSWRxCurrentPage(shareLinkId ?? undefined);
 
   const { data: editorMode } = useEditorMode();
 
@@ -117,7 +118,7 @@ const DisplaySwitcher = (): JSX.Element => {
         { isEditable && (
           <TabPane tabId={EditorMode.Editor}>
             <div data-testid="page-editor" id="page-editor">
-              <Editor />
+              <PageEditor />
             </div>
           </TabPane>
         ) }

packages/app/src/components/Page/RevisionBody.jsx

@@ -1,6 +1,6 @@
 import React from 'react';
-import PropTypes from 'prop-types';
 
+import PropTypes from 'prop-types';
 import { debounce } from 'throttle-debounce';
 
 export default class RevisionBody extends React.PureComponent {
@@ -58,12 +58,7 @@ export default class RevisionBody extends React.PureComponent {
     const additionalClassName = this.props.additionalClassName || '';
     return (
       <div
-        ref={(elm) => {
-          this.element = elm;
-          if (this.props.inputRef != null) {
-            this.props.inputRef(elm);
-          }
-        }}
+        ref={this.props.inputRef}
         id="wiki"
         className={`wiki ${additionalClassName}`}
         // eslint-disable-next-line react/no-danger
@@ -76,7 +71,7 @@ export default class RevisionBody extends React.PureComponent {
 
 RevisionBody.propTypes = {
   html: PropTypes.string,
-  inputRef: PropTypes.func, // for getting div element
+  inputRef: PropTypes.shape({ current: PropTypes.instanceOf(Element) }),
   isMathJaxEnabled: PropTypes.bool,
   renderMathJaxOnInit: PropTypes.bool,
   renderMathJaxInRealtime: PropTypes.bool,

packages/app/src/components/Page/TrashPageAlert.jsx

@@ -1,18 +1,17 @@
 import React, { useState } from 'react';
-import PropTypes from 'prop-types';
 
-import { withTranslation } from 'react-i18next';
 
 import { UserPicture } from '@growi/ui';
-import { withUnstatedContainers } from '../UnstatedUtils';
-import AppContainer from '~/client/services/AppContainer';
-import PageContainer from '~/client/services/PageContainer';
+import PropTypes from 'prop-types';
+import { withTranslation } from 'react-i18next';
 
+import PageContainer from '~/client/services/PageContainer';
 import { useCurrentUpdatedAt, useShareLinkId } from '~/stores/context';
 import { usePageDeleteModal, usePutBackPageModal } from '~/stores/modal';
 import { useSWRxPageInfo } from '~/stores/page';
 
 import EmptyTrashModal from '../EmptyTrashModal';
+import { withUnstatedContainers } from '../UnstatedUtils';
 
 const onDeletedHandler = (pathOrPathsToDelete, isRecursively, isCompletely) => {
   if (typeof pathOrPathsToDelete !== 'string') {
@@ -145,12 +144,11 @@ const TrashPageAlert = (props) => {
 /**
  * Wrapper component for using unstated
  */
-const TrashPageAlertWrapper = withUnstatedContainers(TrashPageAlert, [AppContainer, PageContainer]);
+const TrashPageAlertWrapper = withUnstatedContainers(TrashPageAlert, [PageContainer]);
 
 
 TrashPageAlert.propTypes = {
   t: PropTypes.func.isRequired, // i18next
-  appContainer: PropTypes.instanceOf(AppContainer).isRequired,
   pageContainer: PropTypes.instanceOf(PageContainer).isRequired,
 };
 

packages/app/src/components/PageEditor.jsx

@@ -1,440 +0,0 @@
-import React from 'react';
-
-import { envUtils } from '@growi/core';
-import detectIndent from 'detect-indent';
-import PropTypes from 'prop-types';
-import { throttle, debounce } from 'throttle-debounce';
-
-import AppContainer from '~/client/services/AppContainer';
-import EditorContainer from '~/client/services/EditorContainer';
-import PageContainer from '~/client/services/PageContainer';
-import { apiGet, apiPost } from '~/client/util/apiv1-client';
-import { getOptionsToSave } from '~/client/util/editor';
-import { useIsEditable, useIsIndentSizeForced, useSlackChannels } from '~/stores/context';
-import { useCurrentIndentSize, useIsSlackEnabled, useIsTextlintEnabled } from '~/stores/editor';
-import {
-  useEditorMode, useIsMobile, useSelectedGrant, useSelectedGrantGroupId, useSelectedGrantGroupName,
-} from '~/stores/ui';
-import loggerFactory from '~/utils/logger';
-
-
-import { ConflictDiffModal } from './PageEditor/ConflictDiffModal';
-import Editor from './PageEditor/Editor';
-import Preview from './PageEditor/Preview';
-import scrollSyncHelper from './PageEditor/ScrollSyncHelper';
-import { withUnstatedContainers } from './UnstatedUtils';
-
-
-// TODO: remove this when omitting unstated is completed
-
-const logger = loggerFactory('growi:PageEditor');
-
-class PageEditor extends React.Component {
-
-  constructor(props) {
-    super(props);
-
-    this.previewElement = React.createRef();
-
-    const config = this.props.appContainer.getConfig();
-    const isUploadable = config.upload.image || config.upload.file;
-    const isUploadableFile = config.upload.file;
-    const isMathJaxEnabled = !!config.env.MATHJAX;
-
-    this.state = {
-      markdown: this.props.pageContainer.state.markdown,
-      isUploadable,
-      isUploadableFile,
-      isMathJaxEnabled,
-    };
-
-    this.setCaretLine = this.setCaretLine.bind(this);
-    this.focusToEditor = this.focusToEditor.bind(this);
-    this.onMarkdownChanged = this.onMarkdownChanged.bind(this);
-    this.onSaveWithShortcut = this.onSaveWithShortcut.bind(this);
-    this.onUpload = this.onUpload.bind(this);
-    this.onEditorScroll = this.onEditorScroll.bind(this);
-    this.onEditorScrollCursorIntoView = this.onEditorScrollCursorIntoView.bind(this);
-    this.onPreviewScroll = this.onPreviewScroll.bind(this);
-    this.saveDraft = this.saveDraft.bind(this);
-    this.clearDraft = this.clearDraft.bind(this);
-
-    // for scrolling
-    this.lastScrolledDateWithCursor = null;
-    this.isOriginOfScrollSyncEditor = false;
-    this.isOriginOfScrollSyncEditor = false;
-
-    // create throttled function
-    this.scrollPreviewByEditorLineWithThrottle = throttle(20, this.scrollPreviewByEditorLine);
-    this.scrollPreviewByCursorMovingWithThrottle = throttle(20, this.scrollPreviewByCursorMoving);
-    this.scrollEditorByPreviewScrollWithThrottle = throttle(20, this.scrollEditorByPreviewScroll);
-    this.setMarkdownStateWithDebounce = debounce(50, throttle(100, (value) => {
-      this.setState({ markdown: value });
-    }));
-    this.saveDraftWithDebounce = debounce(800, this.saveDraft);
-
-    // Detect indent size from contents (only when users are allowed to change it)
-    // TODO: https://youtrack.weseek.co.jp/issue/GW-5368
-    if (!props.isIndentSizeForced && this.state.markdown) {
-      const detectedIndent = detectIndent(this.state.markdown);
-      if (detectedIndent.type === 'space' && new Set([2, 4]).has(detectedIndent.amount)) {
-        props.mutateCurrentIndentSize(detectedIndent.amount);
-      }
-    }
-  }
-
-  componentWillMount() {
-    this.props.appContainer.registerComponentInstance('PageEditor', this);
-  }
-
-  getMarkdown() {
-    return this.state.markdown;
-  }
-
-  updateEditorValue(markdown) {
-    this.editor.setValue(markdown);
-  }
-
-  focusToEditor() {
-    this.editor.forceToFocus();
-  }
-
-  /**
-   * set caret position of editor
-   * @param {number} line
-   */
-  setCaretLine(line) {
-    this.editor.setCaretLine(line);
-    scrollSyncHelper.scrollPreview(this.previewElement, line);
-  }
-
-  /**
-   * the change event handler for `markdown` state
-   * @param {string} value
-   */
-  onMarkdownChanged(value) {
-    const { pageContainer } = this.props;
-    this.setMarkdownStateWithDebounce(value);
-    // only when the first time to edit
-    if (!pageContainer.state.revisionId) {
-      this.saveDraftWithDebounce();
-    }
-  }
-
-  // Displays an alert if there is a difference with pageContainer's markdown
-  componentDidUpdate(prevProps, prevState) {
-    const { pageContainer, editorContainer } = this.props;
-
-    if (this.state.markdown !== prevState.markdown) {
-      if (pageContainer.state.markdown !== this.state.markdown) {
-        editorContainer.enableUnsavedWarning();
-      }
-    }
-  }
-
-  /**
-   * save and update state of containers
-   */
-  async onSaveWithShortcut() {
-    const {
-      isSlackEnabled, slackChannels, grant, grantGroupId, grantGroupName, editorContainer, pageContainer,
-    } = this.props;
-
-    const optionsToSave = getOptionsToSave(isSlackEnabled, slackChannels, grant, grantGroupId, grantGroupName, editorContainer);
-
-    try {
-      // disable unsaved warning
-      editorContainer.disableUnsavedWarning();
-
-      // eslint-disable-next-line no-unused-vars
-      const { page, tags } = await pageContainer.save(this.state.markdown, this.props.editorMode, optionsToSave);
-      logger.debug('success to save');
-
-      pageContainer.showSuccessToastr();
-
-      // update state of EditorContainer
-      editorContainer.setState({ tags });
-    }
-    catch (error) {
-      logger.error('failed to save', error);
-      pageContainer.showErrorToastr(error);
-    }
-  }
-
-  /**
-   * the upload event handler
-   * @param {any} file
-   */
-  async onUpload(file) {
-    const {
-      appContainer, pageContainer, mutateGrant,
-    } = this.props;
-
-    try {
-      let res = await apiGet('/attachments.limit', {
-        fileSize: file.size,
-      });
-
-      if (!res.isUploadable) {
-        throw new Error(res.errorMessage);
-      }
-
-      const formData = new FormData();
-      const { pageId, path } = pageContainer.state;
-      formData.append('_csrf', appContainer.csrfToken);
-      formData.append('file', file);
-      formData.append('path', path);
-      if (pageId != null) {
-        formData.append('page_id', pageContainer.state.pageId);
-      }
-
-      res = await apiPost('/attachments.add', formData);
-      const attachment = res.attachment;
-      const fileName = attachment.originalName;
-
-      let insertText = `[${fileName}](${attachment.filePathProxied})`;
-      // when image
-      if (attachment.fileFormat.startsWith('image/')) {
-        // modify to "![fileName](url)" syntax
-        insertText = `!${insertText}`;
-      }
-      this.editor.insertText(insertText);
-
-      // when if created newly
-      if (res.pageCreated) {
-        logger.info('Page is created', res.page._id);
-        pageContainer.updateStateAfterSave(res.page, res.tags, res.revision, this.props.editorMode);
-        mutateGrant(res.page.grant);
-      }
-    }
-    catch (e) {
-      logger.error('failed to upload', e);
-      pageContainer.showErrorToastr(e);
-    }
-    finally {
-      this.editor.terminateUploadingState();
-    }
-  }
-
-  /**
-   * the scroll event handler from codemirror
-   * @param {any} data {left, top, width, height, clientWidth, clientHeight} object that represents the current scroll position,
-   *                    the size of the scrollable area, and the size of the visible area (minus scrollbars).
-   *                    And data.line is also available that is added by Editor component
-   * @see https://codemirror.net/doc/manual.html#events
-   */
-  onEditorScroll(data) {
-    // prevent scrolling
-    //   if the elapsed time from last scroll with cursor is shorter than 40ms
-    const now = new Date();
-    if (now - this.lastScrolledDateWithCursor < 40) {
-      return;
-    }
-
-    this.scrollPreviewByEditorLineWithThrottle(data.line);
-  }
-
-  /**
-   * the scroll event handler from codemirror
-   * @param {number} line
-   * @see https://codemirror.net/doc/manual.html#events
-   */
-  onEditorScrollCursorIntoView(line) {
-    // record date
-    this.lastScrolledDateWithCursor = new Date();
-    this.scrollPreviewByCursorMovingWithThrottle(line);
-  }
-
-  /**
-   * scroll Preview element by scroll event
-   * @param {number} line
-   */
-  scrollPreviewByEditorLine(line) {
-    if (this.previewElement == null) {
-      return;
-    }
-
-    // prevent circular invocation
-    if (this.isOriginOfScrollSyncPreview) {
-      this.isOriginOfScrollSyncPreview = false; // turn off the flag
-      return;
-    }
-
-    // turn on the flag
-    this.isOriginOfScrollSyncEditor = true;
-    scrollSyncHelper.scrollPreview(this.previewElement, line);
-  }
-
-  /**
-   * scroll Preview element by cursor moving
-   * @param {number} line
-   */
-  scrollPreviewByCursorMoving(line) {
-    if (this.previewElement == null) {
-      return;
-    }
-
-    // prevent circular invocation
-    if (this.isOriginOfScrollSyncPreview) {
-      this.isOriginOfScrollSyncPreview = false; // turn off the flag
-      return;
-    }
-
-    // turn on the flag
-    this.isOriginOfScrollSyncEditor = true;
-    scrollSyncHelper.scrollPreviewToRevealOverflowing(this.previewElement, line);
-  }
-
-  /**
-   * the scroll event handler from Preview component
-   * @param {number} offset
-   */
-  onPreviewScroll(offset) {
-    this.scrollEditorByPreviewScrollWithThrottle(offset);
-  }
-
-  /**
-   * scroll Editor component by scroll event of Preview component
-   * @param {number} offset
-   */
-  scrollEditorByPreviewScroll(offset) {
-    if (this.previewElement == null) {
-      return;
-    }
-
-    // prevent circular invocation
-    if (this.isOriginOfScrollSyncEditor) {
-      this.isOriginOfScrollSyncEditor = false; // turn off the flag
-      return;
-    }
-
-    // turn on the flag
-    this.isOriginOfScrollSyncPreview = true;
-    scrollSyncHelper.scrollEditor(this.editor, this.previewElement, offset);
-  }
-
-  saveDraft() {
-    const { pageContainer, editorContainer } = this.props;
-    editorContainer.saveDraft(pageContainer.state.path, this.state.markdown);
-  }
-
-  clearDraft() {
-    this.props.editorContainer.clearDraft(this.props.pageContainer.state.path);
-  }
-
-  render() {
-    if (!this.props.isEditable) {
-      return null;
-    }
-
-    const config = this.props.appContainer.getConfig();
-    const noCdn = envUtils.toBoolean(config.env.NO_CDN);
-
-    return (
-      <div className="d-flex flex-wrap">
-        <div className="page-editor-editor-container flex-grow-1 flex-basis-0 mw-0">
-          <Editor
-            ref={(c) => { this.editor = c }}
-            value={this.state.markdown}
-            noCdn={noCdn}
-            isMobile={this.props.isMobile}
-            isUploadable={this.state.isUploadable}
-            isUploadableFile={this.state.isUploadableFile}
-            isTextlintEnabled={this.props.isTextlintEnabled}
-            indentSize={this.props.indentSize}
-            onScroll={this.onEditorScroll}
-            onScrollCursorIntoView={this.onEditorScrollCursorIntoView}
-            onChange={this.onMarkdownChanged}
-            onUpload={this.onUpload}
-            onSave={this.onSaveWithShortcut}
-          />
-        </div>
-        <div className="d-none d-lg-block page-editor-preview-container flex-grow-1 flex-basis-0 mw-0">
-          <Preview
-            markdown={this.state.markdown}
-            // eslint-disable-next-line no-return-assign
-            inputRef={(el) => { return this.previewElement = el }}
-            isMathJaxEnabled={this.state.isMathJaxEnabled}
-            renderMathJaxOnInit={false}
-            onScroll={this.onPreviewScroll}
-          />
-        </div>
-        <ConflictDiffModal
-          isOpen={this.props.pageContainer.state.isConflictDiffModalOpen}
-          onClose={() => this.props.pageContainer.setState({ isConflictDiffModalOpen: false })}
-          appContainer={this.props.appContainer}
-          pageContainer={this.props.pageContainer}
-          markdownOnEdit={this.state.markdown}
-        />
-      </div>
-    );
-  }
-
-}
-
-PageEditor.propTypes = {
-  appContainer: PropTypes.instanceOf(AppContainer).isRequired,
-  pageContainer: PropTypes.instanceOf(PageContainer).isRequired,
-  editorContainer: PropTypes.instanceOf(EditorContainer).isRequired,
-
-  isEditable: PropTypes.bool.isRequired,
-
-  // TODO: remove this when omitting unstated is completed
-  editorMode: PropTypes.string.isRequired,
-  isMobile: PropTypes.bool,
-  isSlackEnabled: PropTypes.bool.isRequired,
-  slackChannels: PropTypes.string.isRequired,
-  grant: PropTypes.number.isRequired,
-  grantGroupId: PropTypes.string,
-  grantGroupName: PropTypes.string,
-  mutateGrant: PropTypes.func,
-  isTextlintEnabled: PropTypes.bool,
-  isIndentSizeForced: PropTypes.bool,
-  indentSize: PropTypes.number,
-  mutateCurrentIndentSize: PropTypes.func,
-};
-
-/**
- * Wrapper component for using unstated
- */
-const PageEditorHOCWrapper = withUnstatedContainers(PageEditor, [AppContainer, PageContainer, EditorContainer]);
-
-const PageEditorWrapper = (props) => {
-  const { data: isEditable } = useIsEditable();
-  const { data: editorMode } = useEditorMode();
-  const { data: isMobile } = useIsMobile();
-  const { data: isSlackEnabled } = useIsSlackEnabled();
-  const { data: slackChannels } = useSlackChannels();
-  const { data: grant, mutate: mutateGrant } = useSelectedGrant();
-  const { data: grantGroupId } = useSelectedGrantGroupId();
-  const { data: grantGroupName } = useSelectedGrantGroupName();
-  const { data: isTextlintEnabled } = useIsTextlintEnabled();
-  const { data: isIndentSizeForced } = useIsIndentSizeForced();
-  const { data: indentSize, mutate: mutateCurrentIndentSize } = useCurrentIndentSize();
-
-  if (isEditable == null || editorMode == null) {
-    return null;
-  }
-
-  return (
-    <PageEditorHOCWrapper
-      {...props}
-      isEditable={isEditable}
-      editorMode={editorMode}
-      isMobile={isMobile}
-      isSlackEnabled={isSlackEnabled}
-      slackChannels={slackChannels}
-      grant={grant}
-      grantGroupId={grantGroupId}
-      grantGroupName={grantGroupName}
-      mutateGrant={mutateGrant}
-      isTextlintEnabled={isTextlintEnabled}
-      isIndentSizeForced={isIndentSizeForced}
-      indentSize={indentSize}
-      mutateCurrentIndentSize={mutateCurrentIndentSize}
-
-    />
-  );
-};
-
-export default PageEditorWrapper;

packages/app/src/components/PageEditor.tsx

@@ -0,0 +1,430 @@
+import React, {
+  useCallback, useEffect, useMemo, useRef, useState,
+} from 'react';
+
+import EventEmitter from 'events';
+
+import { envUtils } from '@growi/core';
+import detectIndent from 'detect-indent';
+import { throttle, debounce } from 'throttle-debounce';
+
+import AppContainer from '~/client/services/AppContainer';
+import EditorContainer from '~/client/services/EditorContainer';
+import PageContainer from '~/client/services/PageContainer';
+import { apiGet, apiPost } from '~/client/util/apiv1-client';
+import { getOptionsToSave } from '~/client/util/editor';
+import { useIsEditable, useIsIndentSizeForced, useSlackChannels } from '~/stores/context';
+import { useCurrentIndentSize, useIsSlackEnabled, useIsTextlintEnabled } from '~/stores/editor';
+import {
+  EditorMode,
+  useEditorMode, useIsMobile, useSelectedGrant, useSelectedGrantGroupId, useSelectedGrantGroupName,
+} from '~/stores/ui';
+import loggerFactory from '~/utils/logger';
+
+
+import { ConflictDiffModal } from './PageEditor/ConflictDiffModal';
+import Editor from './PageEditor/Editor';
+import Preview from './PageEditor/Preview';
+import scrollSyncHelper from './PageEditor/ScrollSyncHelper';
+import { withUnstatedContainers } from './UnstatedUtils';
+
+
+// TODO: remove this when omitting unstated is completed
+
+const logger = loggerFactory('growi:PageEditor');
+
+
+declare let window: {
+  globalEmitter: EventEmitter,
+};
+
+type EditorRef = {
+  setValue: (markdown: string) => void,
+  setCaretLine: (line: number) => void,
+  insertText: (text: string) => void,
+  forceToFocus: () => void,
+  terminateUploadingState: () => void,
+}
+
+type Props = {
+  appContainer: AppContainer,
+  pageContainer: PageContainer,
+  editorContainer: EditorContainer,
+
+  isEditable: boolean,
+
+  editorMode: string,
+  isSlackEnabled: boolean,
+  slackChannels: string,
+  isMobile?: boolean,
+
+  grant: number,
+  grantGroupId?: string,
+  grantGroupName?: string,
+  mutateGrant: (grant: number) => void,
+
+  isTextlintEnabled?: boolean,
+  isIndentSizeForced?: boolean,
+  indentSize?: number,
+  mutateCurrentIndentSize: (indent: number) => void,
+};
+
+// for scrolling
+let lastScrolledDateWithCursor: Date | null = null;
+let isOriginOfScrollSyncEditor = false;
+let isOriginOfScrollSyncPreview = false;
+
+const PageEditor = (props: Props): JSX.Element => {
+  const {
+    appContainer, pageContainer, editorContainer,
+  } = props;
+
+  const { data: isEditable } = useIsEditable();
+  const { data: editorMode } = useEditorMode();
+  const { data: isMobile } = useIsMobile();
+  const { data: isSlackEnabled } = useIsSlackEnabled();
+  const { data: slackChannels } = useSlackChannels();
+  const { data: grant, mutate: mutateGrant } = useSelectedGrant();
+  const { data: grantGroupId } = useSelectedGrantGroupId();
+  const { data: grantGroupName } = useSelectedGrantGroupName();
+  const { data: isTextlintEnabled } = useIsTextlintEnabled();
+  const { data: isIndentSizeForced } = useIsIndentSizeForced();
+  const { data: indentSize, mutate: mutateCurrentIndentSize } = useCurrentIndentSize();
+
+  // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+  const [markdown, setMarkdown] = useState<string>(pageContainer.state.markdown!);
+
+
+  const editorRef = useRef<EditorRef>(null);
+  const previewRef = useRef<HTMLDivElement>(null);
+
+  const setMarkdownWithDebounce = useMemo(() => debounce(50, throttle(100, value => setMarkdown(value))), []);
+  const saveDraftWithDebounce = useMemo(() => debounce(800, () => {
+    editorContainer.saveDraft(pageContainer.state.path, markdown);
+  }), [editorContainer, markdown, pageContainer.state.path]);
+
+  const markdownChangedHandler = useCallback((value: string): void => {
+    setMarkdownWithDebounce(value);
+    // only when the first time to edit
+    if (!pageContainer.state.revisionId) {
+      saveDraftWithDebounce();
+    }
+  }, [pageContainer.state.revisionId, saveDraftWithDebounce, setMarkdownWithDebounce]);
+
+
+  const saveWithShortcut = useCallback(async() => {
+    if (grant == null) {
+      return;
+    }
+
+    const optionsToSave = getOptionsToSave(isSlackEnabled ?? false, slackChannels, grant, grantGroupId, grantGroupName, editorContainer);
+
+    try {
+      // disable unsaved warning
+      editorContainer.disableUnsavedWarning();
+
+      // eslint-disable-next-line no-unused-vars
+      const { tags } = await pageContainer.save(markdown, editorMode, optionsToSave);
+      logger.debug('success to save');
+
+      pageContainer.showSuccessToastr();
+
+      // update state of EditorContainer
+      editorContainer.setState({ tags });
+    }
+    catch (error) {
+      logger.error('failed to save', error);
+      pageContainer.showErrorToastr(error);
+    }
+  }, [editorContainer, editorMode, grant, grantGroupId, grantGroupName, isSlackEnabled, markdown, pageContainer, slackChannels]);
+
+
+  /**
+   * the upload event handler
+   * @param {any} file
+   */
+  const uploadHandler = useCallback(async(file) => {
+    if (editorRef.current == null) {
+      return;
+    }
+
+    try {
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      let res: any = await apiGet('/attachments.limit', {
+        fileSize: file.size,
+      });
+
+      if (!res.isUploadable) {
+        throw new Error(res.errorMessage);
+      }
+
+      const formData = new FormData();
+      const { pageId, path } = pageContainer.state;
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+      formData.append('_csrf', appContainer.csrfToken!);
+      formData.append('file', file);
+      if (path != null) {
+        formData.append('path', path);
+      }
+      if (pageId != null) {
+        formData.append('page_id', pageId);
+      }
+
+      res = await apiPost('/attachments.add', formData);
+      const attachment = res.attachment;
+      const fileName = attachment.originalName;
+
+      let insertText = `[${fileName}](${attachment.filePathProxied})`;
+      // when image
+      if (attachment.fileFormat.startsWith('image/')) {
+        // modify to "![fileName](url)" syntax
+        insertText = `!${insertText}`;
+      }
+      editorRef.current.insertText(insertText);
+
+      // when if created newly
+      if (res.pageCreated) {
+        logger.info('Page is created', res.page._id);
+        pageContainer.updateStateAfterSave(res.page, res.tags, res.revision, editorMode);
+        mutateGrant(res.page.grant);
+      }
+    }
+    catch (e) {
+      logger.error('failed to upload', e);
+      pageContainer.showErrorToastr(e);
+    }
+    finally {
+      editorRef.current.terminateUploadingState();
+    }
+  }, [appContainer.csrfToken, editorMode, mutateGrant, pageContainer]);
+
+
+  const scrollPreviewByEditorLine = useCallback((line: number) => {
+    if (previewRef.current == null) {
+      return;
+    }
+
+    // prevent circular invocation
+    if (isOriginOfScrollSyncPreview) {
+      isOriginOfScrollSyncPreview = false; // turn off the flag
+      return;
+    }
+
+    // turn on the flag
+    isOriginOfScrollSyncEditor = true;
+    scrollSyncHelper.scrollPreview(previewRef.current, line);
+  }, []);
+  const scrollPreviewByEditorLineWithThrottle = useMemo(() => throttle(20, scrollPreviewByEditorLine), [scrollPreviewByEditorLine]);
+
+  /**
+   * the scroll event handler from codemirror
+   * @param {any} data {left, top, width, height, clientWidth, clientHeight} object that represents the current scroll position,
+   *                    the size of the scrollable area, and the size of the visible area (minus scrollbars).
+   *                    And data.line is also available that is added by Editor component
+   * @see https://codemirror.net/doc/manual.html#events
+   */
+  const editorScrolledHandler = useCallback(({ line }: { line: number }) => {
+    // prevent scrolling
+    //   if the elapsed time from last scroll with cursor is shorter than 40ms
+    const now = new Date();
+    if (lastScrolledDateWithCursor != null && now.getTime() - lastScrolledDateWithCursor.getTime() < 40) {
+      return;
+    }
+
+    scrollPreviewByEditorLineWithThrottle(line);
+  }, [scrollPreviewByEditorLineWithThrottle]);
+
+  /**
+   * scroll Preview element by cursor moving
+   * @param {number} line
+   */
+  const scrollPreviewByCursorMoving = useCallback((line: number) => {
+    if (previewRef.current == null) {
+      return;
+    }
+
+    // prevent circular invocation
+    if (isOriginOfScrollSyncPreview) {
+      isOriginOfScrollSyncPreview = false; // turn off the flag
+      return;
+    }
+
+    // turn on the flag
+    isOriginOfScrollSyncEditor = true;
+    scrollSyncHelper.scrollPreviewToRevealOverflowing(previewRef.current, line);
+  }, []);
+  const scrollPreviewByCursorMovingWithThrottle = useMemo(() => throttle(20, scrollPreviewByCursorMoving), [scrollPreviewByCursorMoving]);
+
+  /**
+   * the scroll event handler from codemirror
+   * @param {number} line
+   * @see https://codemirror.net/doc/manual.html#events
+   */
+  const editorScrollCursorIntoViewHandler = useCallback((line: number) => {
+    // record date
+    lastScrolledDateWithCursor = new Date();
+    scrollPreviewByCursorMovingWithThrottle(line);
+  }, [scrollPreviewByCursorMovingWithThrottle]);
+
+  /**
+   * scroll Editor component by scroll event of Preview component
+   * @param {number} offset
+   */
+  const scrollEditorByPreviewScroll = useCallback((offset: number) => {
+    if (editorRef.current == null || previewRef.current == null) {
+      return;
+    }
+
+    // prevent circular invocation
+    if (isOriginOfScrollSyncEditor) {
+      isOriginOfScrollSyncEditor = false; // turn off the flag
+      return;
+    }
+
+    // turn on the flag
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    isOriginOfScrollSyncPreview = true;
+
+    scrollSyncHelper.scrollEditor(editorRef.current, previewRef.current, offset);
+  }, []);
+  const scrollEditorByPreviewScrollWithThrottle = useMemo(() => throttle(20, scrollEditorByPreviewScroll), [scrollEditorByPreviewScroll]);
+
+
+  // register dummy instance to get markdown
+  useEffect(() => {
+    const pageEditorInstance = {
+      getMarkdown: () => {
+        return markdown;
+      },
+    };
+    appContainer.registerComponentInstance('PageEditor', pageEditorInstance);
+  }, [appContainer, markdown]);
+
+  // initial caret line
+  useEffect(() => {
+    if (editorRef.current != null) {
+      editorRef.current.setCaretLine(0);
+    }
+  }, []);
+
+  // set handler to set caret line
+  useEffect(() => {
+    const handler = (line) => {
+      if (editorRef.current != null) {
+        editorRef.current.setCaretLine(line);
+      }
+      if (previewRef.current != null) {
+        scrollSyncHelper.scrollPreview(previewRef.current, line);
+      }
+    };
+    window.globalEmitter.on('setCaretLine', handler);
+
+    return function cleanup() {
+      window.globalEmitter.removeListener('setCaretLine', handler);
+    };
+  }, []);
+
+  // set handler to focus
+  useEffect(() => {
+    if (editorRef.current != null && editorMode === EditorMode.Editor) {
+      editorRef.current.forceToFocus();
+    }
+  }, [editorMode]);
+
+  // set handler to update editor value
+  useEffect(() => {
+    const handler = (markdown) => {
+      if (editorRef.current != null) {
+        editorRef.current.setValue(markdown);
+      }
+    };
+    window.globalEmitter.on('updateEditorValue', handler);
+
+    return function cleanup() {
+      window.globalEmitter.removeListener('updateEditorValue', handler);
+    };
+  }, []);
+
+  // Displays an alert if there is a difference with pageContainer's markdown
+  useEffect(() => {
+    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+    if (pageContainer.state.markdown! !== markdown) {
+      editorContainer.enableUnsavedWarning();
+    }
+  }, [editorContainer, markdown, pageContainer.state.markdown]);
+
+  // Detect indent size from contents (only when users are allowed to change it)
+  useEffect(() => {
+    const currentPageMarkdown = pageContainer.state.markdown;
+    if (!isIndentSizeForced && currentPageMarkdown != null) {
+      const detectedIndent = detectIndent(currentPageMarkdown);
+      if (detectedIndent.type === 'space' && new Set([2, 4]).has(detectedIndent.amount)) {
+        mutateCurrentIndentSize(detectedIndent.amount);
+      }
+    }
+  }, [isIndentSizeForced, mutateCurrentIndentSize, pageContainer.state.markdown]);
+
+
+  if (!isEditable) {
+    return <></>;
+  }
+
+  const config = props.appContainer.getConfig();
+  const isUploadable = config.upload.image || config.upload.file;
+  const isUploadableFile = config.upload.file;
+  const isMathJaxEnabled = !!config.env.MATHJAX;
+
+  const noCdn = envUtils.toBoolean(config.env.NO_CDN);
+
+  // TODO: omit no-explicit-any -- 2022.06.02 Yuki Takei
+  // It is impossible to avoid the error
+  //  "Property '...' does not exist on type 'IntrinsicAttributes & RefAttributes<any>'"
+  //  because Editor is a class component and must be wrapped with React.forwardRef
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const EditorAny = Editor as any;
+
+  return (
+    <div className="d-flex flex-wrap">
+      <div className="page-editor-editor-container flex-grow-1 flex-basis-0 mw-0">
+        <EditorAny
+          ref={editorRef}
+          value={markdown}
+          noCdn={noCdn}
+          isMobile={isMobile}
+          isUploadable={isUploadable}
+          isUploadableFile={isUploadableFile}
+          isTextlintEnabled={isTextlintEnabled}
+          indentSize={indentSize}
+          onScroll={editorScrolledHandler}
+          onScrollCursorIntoView={editorScrollCursorIntoViewHandler}
+          onChange={markdownChangedHandler}
+          onUpload={uploadHandler}
+          onSave={() => saveWithShortcut()}
+        />
+      </div>
+      <div className="d-none d-lg-block page-editor-preview-container flex-grow-1 flex-basis-0 mw-0">
+        <Preview
+          markdown={markdown}
+          // eslint-disable-next-line no-return-assign
+          inputRef={previewRef}
+          isMathJaxEnabled={isMathJaxEnabled}
+          renderMathJaxOnInit={false}
+          onScroll={offset => scrollEditorByPreviewScrollWithThrottle(offset)}
+        />
+      </div>
+      <ConflictDiffModal
+        isOpen={pageContainer.state.isConflictDiffModalOpen}
+        onClose={() => pageContainer.setState({ isConflictDiffModalOpen: false })}
+        pageContainer={pageContainer}
+        markdownOnEdit={markdown}
+      />
+    </div>
+  );
+};
+
+/**
+   * Wrapper component for using unstated
+   */
+const PageEditorWrapper = withUnstatedContainers(PageEditor, [AppContainer, PageContainer, EditorContainer]);
+
+export default PageEditorWrapper;

packages/app/src/components/PageEditor/ConflictDiffModal.tsx

@@ -1,22 +1,22 @@
 import React, {
-  useState, useEffect, FC, useRef,
+  useState, useEffect, useRef, useMemo, useCallback,
 } from 'react';
-import PropTypes from 'prop-types';
+
 import { UserPicture } from '@growi/ui';
+import CodeMirror from 'codemirror/lib/codemirror';
+import { format } from 'date-fns';
+import { useTranslation } from 'react-i18next';
 import {
   Modal, ModalHeader, ModalBody, ModalFooter,
 } from 'reactstrap';
-import { useTranslation } from 'react-i18next';
-import { format } from 'date-fns';
-import CodeMirror from 'codemirror/lib/codemirror';
-
-import PageContainer from '../../client/services/PageContainer';
-import AppContainer from '../../client/services/AppContainer';
-import ExpandOrContractButton from '../ExpandOrContractButton';
 
+import { IUser } from '~/interfaces/user';
+import { useCurrentUser } from '~/stores/context';
 import { useEditorMode } from '~/stores/ui';
 
+import PageContainer from '../../client/services/PageContainer';
 import { IRevisionOnConflict } from '../../interfaces/revision';
+import ExpandOrContractButton from '../ExpandOrContractButton';
 import { UncontrolledCodeMirror } from '../UncontrolledCodeMirror';
 
 require('codemirror/lib/codemirror.css');
@@ -27,10 +27,9 @@ const DMP = require('diff_match_patch');
 Object.keys(DMP).forEach((key) => { window[key] = DMP[key] });
 
 type ConflictDiffModalProps = {
-  isOpen: boolean | null;
+  isOpen?: boolean;
   onClose?: (() => void);
   pageContainer: PageContainer;
-  appContainer: AppContainer;
   markdownOnEdit: string;
 };
 
@@ -38,26 +37,26 @@ type IRevisionOnConflictWithStringDate = Omit<IRevisionOnConflict, 'createdAt'>
   createdAt: string
 }
 
-export const ConflictDiffModal: FC<ConflictDiffModalProps> = (props) => {
+const ConflictDiffModalCore = (props: ConflictDiffModalProps & { currentUser: IUser }): JSX.Element => {
+  const { currentUser, pageContainer, onClose } = props;
+
+  const { data: editorMode } = useEditorMode();
+
   const { t } = useTranslation('');
   const [resolvedRevision, setResolvedRevision] = useState<string>('');
   const [isRevisionselected, setIsRevisionSelected] = useState<boolean>(false);
   const [isModalExpanded, setIsModalExpanded] = useState<boolean>(false);
   const [codeMirrorRef, setCodeMirrorRef] = useState<HTMLDivElement | null>(null);
 
-  const { data: editorMode } = useEditorMode();
-
   const uncontrolledRef = useRef<CodeMirror>(null);
 
-  const { pageContainer, appContainer } = props;
-
   const currentTime: Date = new Date();
 
   const request: IRevisionOnConflictWithStringDate = {
     revisionId: '',
     revisionBody: props.markdownOnEdit,
     createdAt: format(currentTime, 'yyyy/MM/dd HH:mm:ss'),
-    user: appContainer.currentUser,
+    user: currentUser,
   };
   const origin: IRevisionOnConflictWithStringDate = {
     revisionId: pageContainer.state.revisionId || '',
@@ -89,13 +88,13 @@ export const ConflictDiffModal: FC<ConflictDiffModalProps> = (props) => {
     }
   }, [codeMirrorRef, origin.revisionBody, request.revisionBody, latest.revisionBody]);
 
-  const onClose = () => {
-    if (props.onClose != null) {
-      props.onClose();
+  const close = useCallback(() => {
+    if (onClose != null) {
+      onClose();
     }
-  };
+  }, [onClose]);
 
-  const onResolveConflict = async() : Promise<void> => {
+  const onResolveConflict = useCallback(async() => {
     // disable button after clicked
     setIsRevisionSelected(false);
 
@@ -103,40 +102,34 @@ export const ConflictDiffModal: FC<ConflictDiffModalProps> = (props) => {
 
     try {
       await pageContainer.resolveConflict(codeMirrorVal, editorMode);
-      onClose();
+      close();
       pageContainer.showSuccessToastr();
     }
     catch (error) {
       pageContainer.showErrorToastr(error);
     }
 
-  };
-
-  const onExpandModal = () => {
-    setIsModalExpanded(true);
-  };
+  }, [editorMode, close, pageContainer]);
 
-  const onContractModal = () => {
-    setIsModalExpanded(false);
-  };
-
-  const resizeAndCloseButtons = (
+  const resizeAndCloseButtons = useMemo(() => (
     <div className="d-flex flex-nowrap">
       <ExpandOrContractButton
         isWindowExpanded={isModalExpanded}
-        expandWindow={onExpandModal}
-        contractWindow={onContractModal}
+        expandWindow={() => setIsModalExpanded(true)}
+        contractWindow={() => setIsModalExpanded(false)}
       />
-      <button type="button" className="close text-white" onClick={onClose} aria-label="Close">
+      <button type="button" className="close text-white" onClick={close} aria-label="Close">
         <span aria-hidden="true">&times;</span>
       </button>
     </div>
-  );
+  ), [isModalExpanded, close]);
+
+  const isOpen = props.isOpen ?? false;
 
   return (
     <Modal
-      isOpen={props.isOpen || false}
-      toggle={onClose}
+      isOpen={isOpen}
+      toggle={close}
       backdrop="static"
       className={`${isModalExpanded ? ' grw-modal-expanded' : ''}`}
       size="xl"
@@ -145,7 +138,7 @@ export const ConflictDiffModal: FC<ConflictDiffModalProps> = (props) => {
         <i className="icon-fw icon-exclamation" />{t('modal_resolve_conflict.resolve_conflict')}
       </ModalHeader>
       <ModalBody className="mx-4 my-1">
-        { props.isOpen
+        { isOpen
         && (
           <div className="row">
             <div className="col-12 text-center mt-2 mb-4">
@@ -269,14 +262,14 @@ export const ConflictDiffModal: FC<ConflictDiffModalProps> = (props) => {
   );
 };
 
-ConflictDiffModal.propTypes = {
-  isOpen: PropTypes.bool,
-  onClose: PropTypes.func,
-  pageContainer: PropTypes.instanceOf(PageContainer).isRequired,
-  appContainer: PropTypes.instanceOf(AppContainer).isRequired,
-  markdownOnEdit: PropTypes.string.isRequired,
-};
 
-ConflictDiffModal.defaultProps = {
-  isOpen: false,
+export const ConflictDiffModal = (props: ConflictDiffModalProps): JSX.Element => {
+  const { isOpen } = props;
+  const { data: currentUser } = useCurrentUser();
+
+  if (!isOpen || currentUser == null) {
+    return <></>;
+  }
+
+  return <ConflictDiffModalCore {...props} currentUser={currentUser} />;
 };

packages/app/src/components/PageEditor/Preview.tsx

@@ -28,7 +28,6 @@ const Preview = (props: Props): JSX.Element => {
     appContainer,
     markdown, pagePath,
     inputRef,
-    onScroll,
   } = props;
 
   const [html, setHtml] = useState('');
@@ -110,4 +109,9 @@ const Preview = (props: Props): JSX.Element => {
  */
 const PreviewWrapper = withUnstatedContainers(Preview, [AppContainer]);
 
-export default PreviewWrapper;
+// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
+const PreviewWrapper2 = (props): JSX.Element => {
+  return <PreviewWrapper {...props} />;
+};
+
+export default PreviewWrapper2;

packages/app/src/components/PageStatusAlert.jsx

@@ -1,6 +1,6 @@
 import React from 'react';
-import PropTypes from 'prop-types';
 
+import PropTypes from 'prop-types';
 import { withTranslation } from 'react-i18next';
 
 import AppContainer from '~/client/services/AppContainer';
@@ -26,7 +26,6 @@ class PageStatusAlert extends React.Component {
     };
 
     this.getContentsForSomeoneEditingAlert = this.getContentsForSomeoneEditingAlert.bind(this);
-    this.getContentsForRevisionOutdated = this.getContentsForRevisionOutdated.bind(this);
     this.getContentsForDraftExistsAlert = this.getContentsForDraftExistsAlert.bind(this);
     this.getContentsForUpdatedAlert = this.getContentsForUpdatedAlert.bind(this);
     this.onClickResolveConflict = this.onClickResolveConflict.bind(this);
@@ -57,45 +56,6 @@ class PageStatusAlert extends React.Component {
     ];
   }
 
-  getContentsForRevisionOutdated() {
-    const { t, appContainer, pageContainer } = this.props;
-    const pageEditor = appContainer.getComponentInstance('PageEditor');
-
-    let markdownOnEdit = '';
-    let isConflictOnEdit = false;
-
-    if (pageEditor != null) {
-      markdownOnEdit = pageEditor.getMarkdown();
-      isConflictOnEdit = markdownOnEdit !== pageContainer.state.markdown;
-    }
-
-    return [
-      ['bg-warning', 'd-hackmd-none'],
-      <>
-        <i className="icon-fw icon-pencil"></i>
-        {t('modal_resolve_conflict.file_conflicting_with_newer_remote')}
-      </>,
-      <>
-        <button type="button" onClick={() => this.refreshPage()} className="btn btn-outline-white mr-4">
-          <i className="icon-fw icon-reload mr-1"></i>
-          {t('Load latest')}
-        </button>
-        {isConflictOnEdit
-          && (
-            <button
-              type="button"
-              onClick={this.onClickResolveConflict}
-              className="btn btn-outline-white"
-            >
-              <i className="fa fa-fw fa-file-text-o mr-1"></i>
-              {t('modal_resolve_conflict.resolve_conflict')}
-            </button>
-          )
-        }
-      </>,
-    ];
-  }
-
   getContentsForDraftExistsAlert(isRealtime) {
     const { t } = this.props;
     return [
@@ -112,20 +72,42 @@ class PageStatusAlert extends React.Component {
   }
 
   getContentsForUpdatedAlert() {
-    const { t } = this.props;
-    const label1 = t('edited this page');
-    const label2 = t('Load latest');
+    const { t, appContainer, pageContainer } = this.props;
+    const pageEditor = appContainer.getComponentInstance('PageEditor');
+
+    let isConflictOnEdit = false;
+
+    if (pageEditor != null) {
+      const markdownOnEdit = pageEditor.getMarkdown();
+      isConflictOnEdit = markdownOnEdit !== pageContainer.state.markdown;
+    }
+
+    const label1 = isConflictOnEdit
+      ? t('modal_resolve_conflict.file_conflicting_with_newer_remote')
+      : `${pageContainer.state.lastUpdateUsername} ${t('edited this page')}`;
 
     return [
       ['bg-warning'],
       <>
         <i className="icon-fw icon-bulb"></i>
-        {this.props.pageContainer.state.lastUpdateUsername} {label1}
+        {label1}
+      </>,
+      <>
+        <button type="button" onClick={() => this.refreshPage()} className="btn btn-outline-white mr-4">
+          <i className="icon-fw icon-reload mr-1"></i>
+          {t('Load latest')}
+        </button>
+        { isConflictOnEdit && (
+          <button
+            type="button"
+            onClick={this.onClickResolveConflict}
+            className="btn btn-outline-white"
+          >
+            <i className="fa fa-fw fa-file-text-o mr-1"></i>
+            {t('modal_resolve_conflict.resolve_conflict')}
+          </button>
+        )}
       </>,
-      <a href="#" className="btn btn-outline-white" onClick={this.refreshPage}>
-        <i className="icon-fw icon-reload mr-1"></i>
-        {label2}
-      </a>,
     ];
   }
 
@@ -139,12 +121,8 @@ class PageStatusAlert extends React.Component {
 
     let getContentsFunc = null;
 
-    // when conflicting on save
-    if (isRevisionOutdated) {
-      getContentsFunc = this.getContentsForRevisionOutdated;
-    }
     // when remote revision is newer than both
-    else if (isHackmdDocumentOutdated && isRevisionOutdated) {
+    if (isHackmdDocumentOutdated && isRevisionOutdated) {
       getContentsFunc = this.getContentsForUpdatedAlert;
     }
     // when someone editing with HackMD

packages/app/src/server/routes/apiv3/page.js

@@ -245,8 +245,8 @@ module.exports = (crowi) => {
    *                schema:
    *                  $ref: '#/components/schemas/Page'
    */
-  router.get('/', accessTokenParser, loginRequired, validator.getPage, apiV3FormValidator, async(req, res) => {
-    const { pageId, path } = req.query;
+  router.get('/', certifySharedPage, accessTokenParser, loginRequired, validator.getPage, apiV3FormValidator, async(req, res) => {
+    const { pageId, path, user } = req.query;
 
     if (pageId == null && path == null) {
       return res.apiv3Err(new ErrorV3('Parameter path or pageId is required.', 'invalid-request'));
@@ -255,10 +255,10 @@ module.exports = (crowi) => {
     let page;
     try {
       if (pageId != null) { // prioritized
-        page = await Page.findByIdAndViewer(pageId, req.user);
+        page = await Page.findByIdAndViewer(pageId, user);
       }
       else {
-        page = await Page.findByPathAndViewer(path, req.user);
+        page = await Page.findByPathAndViewer(path, user);
       }
     }
     catch (err) {

packages/app/src/stores/context.tsx

@@ -88,8 +88,8 @@ export const useShareLinksNumber = (initialData?: Nullable<any>): SWRResponse<Nu
   return useStaticSWR<Nullable<any>, Error>('shareLinksNumber', initialData);
 };
 
-export const useShareLinkId = (initialData?: Nullable<any>): SWRResponse<Nullable<any>, Error> => {
-  return useStaticSWR<Nullable<any>, Error>('shareLinkId', initialData);
+export const useShareLinkId = (initialData?: Nullable<string>): SWRResponse<Nullable<string>, Error> => {
+  return useStaticSWR<Nullable<string>, Error>('shareLinkId', initialData);
 };
 
 export const useRevisionIdHackmdSynced = (initialData?: Nullable<any>): SWRResponse<Nullable<any>, Error> => {
@@ -197,12 +197,13 @@ export const useIsEditable = (): SWRResponse<boolean, Error> => {
 
 export const useIsSharedUser = (): SWRResponse<boolean, Error> => {
   const { data: isGuestUser } = useIsGuestUser();
-  const { data: currentPagePath } = useCurrentPagePath();
+
+  const pathname = window.location.pathname;
 
   return useSWRImmutable(
-    ['isSharedUser', isGuestUser, currentPagePath],
-    (key: Key, isGuestUser: boolean, currentPagePath: string) => {
-      return isGuestUser && pagePathUtils.isSharedPage(currentPagePath as string);
+    ['isSharedUser', isGuestUser, pathname],
+    (key: Key, isGuestUser: boolean, pathname: string) => {
+      return isGuestUser && pagePathUtils.isSharedPage(pathname);
     },
   );
 };

packages/app/src/stores/page.tsx

@@ -13,20 +13,29 @@ import { IPagingResult } from '~/interfaces/paging-result';
 import { apiGet } from '../client/util/apiv1-client';
 import { IPageTagsInfo } from '../interfaces/pageTagsInfo';
 
-import { useCurrentPagePath } from './context';
+import { useCurrentPageId, useCurrentPagePath } from './context';
 import { ITermNumberManagerUtil, useTermNumberManager } from './use-static-swr';
 
 
-export const useSWRxPageByPath = (path: string | null | undefined, initialData?: IPageHasId): SWRResponse<IPageHasId, Error> => {
+export const useSWRxPage = (pageId?: string, shareLinkId?: string): SWRResponse<IPageHasId, Error> => {
+  return useSWR(
+    pageId != null ? ['/page', pageId, shareLinkId] : null,
+    (endpoint, pageId, shareLinkId) => apiv3Get(endpoint, { pageId, shareLinkId }).then(result => result.data.page),
+  );
+};
+
+export const useSWRxPageByPath = (path?: string): SWRResponse<IPageHasId, Error> => {
   return useSWR(
     path != null ? ['/page', path] : null,
     (endpoint, path) => apiv3Get(endpoint, { path }).then(result => result.data.page),
-    {
-      fallbackData: initialData,
-    },
   );
 };
 
+export const useSWRxCurrentPage = (shareLinkId?: string): SWRResponse<IPageHasId, Error> => {
+  const { data: currentPageId } = useCurrentPageId();
+
+  return useSWRxPage(currentPageId ?? undefined, shareLinkId);
+};
 
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
 export const useSWRxRecentlyUpdated = (): SWRResponse<(IPageHasId)[], Error> => {

packages/app/src/stores/ui.tsx

@@ -287,8 +287,8 @@ export const useSidebarResizeDisabled = (isDisabled?: boolean): SWRResponse<bool
 };
 
 
-export const useSelectedGrant = (initialData?: Nullable<number>): SWRResponse<Nullable<number>, Error> => {
-  return useStaticSWR<Nullable<number>, Error>('grant', initialData);
+export const useSelectedGrant = (initialData?: number): SWRResponse<number, Error> => {
+  return useStaticSWR<number, Error>('grant', initialData);
 };
 
 export const useSelectedGrantGroupId = (initialData?: Nullable<string>): SWRResponse<Nullable<string>, Error> => {

packages/app/src/styles/_layout.scss

@@ -68,7 +68,6 @@ body.growi-layout-fluid .grw-container-convertible {
   position: sticky;
   // growisubnavigation + grw-navbar-boder + some spacing
   top: calc(100px + 4px + 20px);
-  margin-top: 5px;
 }
 
 .grw-fab {

packages/app/src/styles/_page_list.scss

@@ -97,21 +97,6 @@ body .page-list {
   }
 }
 
-.popular-page-high {
-  font-size: 1.1em;
-  font-weight: bold;
-  color: darken($red, 5%);
-}
-
-.popular-page-mid {
-  font-weight: bold;
-  color: #e47800;
-}
-
-.popular-page-low {
-  color: #ab7c7c;
-}
-
 .card-timeline {
   border: 1px solid $gray-300;
   > .card-header {