joplin/ElectronClient/app/gui/NoteText.jsx

const React = require('react');
const Note = require('lib/models/Note.js');
const BaseItem = require('lib/models/BaseItem.js');
const BaseModel = require('lib/BaseModel.js');
const Resource = require('lib/models/Resource.js');
const Folder = require('lib/models/Folder.js');
const Tag = require('lib/models/Tag.js');
const { time } = require('lib/time-utils.js');
const Setting = require('lib/models/Setting.js');
const { IconButton } = require('./IconButton.min.js');
const { urlDecode, substrWithEllipsis } = require('lib/string-utils');
const Toolbar = require('./Toolbar.min.js');
const TagList = require('./TagList.min.js');
const { connect } = require('react-redux');
const { _ } = require('lib/locale.js');
const { reg } = require('lib/registry.js');
const MarkupToHtml = require('lib/renderers/MarkupToHtml');
const shared = require('lib/components/shared/note-screen-shared.js');
const { bridge } = require('electron').remote.require('./bridge');
const { themeStyle } = require('../theme.js');
const AceEditor = require('react-ace').default;
const Menu = bridge().Menu;
const MenuItem = bridge().MenuItem;
const { shim } = require('lib/shim.js');
const eventManager = require('../eventManager');
const fs = require('fs-extra');
const md5 = require('md5');
const mimeUtils = require('lib/mime-utils.js').mime;
const ObjectUtils = require('lib/ObjectUtils');
const urlUtils = require('lib/urlUtils');
const dialogs = require('./dialogs');
const NoteListUtils = require('./utils/NoteListUtils');
const NoteSearchBar = require('./NoteSearchBar.min.js');
const markdownUtils = require('lib/markdownUtils');
const ExternalEditWatcher = require('lib/services/ExternalEditWatcher');
const ResourceFetcher = require('lib/services/ResourceFetcher');
const { toSystemSlashes, safeFilename } = require('lib/path-utils');
const { clipboard } = require('electron');
const SearchEngine = require('lib/services/SearchEngine');
const NoteTextViewer = require('./NoteTextViewer.min');
const NoteRevisionViewer = require('./NoteRevisionViewer.min');
const TemplateUtils = require('lib/TemplateUtils');

require('brace/mode/markdown');
// https://ace.c9.io/build/kitchen-sink.html
// https://highlightjs.org/static/demo/
require('brace/theme/chrome');
require('brace/theme/solarized_light');
require('brace/theme/solarized_dark');
require('brace/theme/twilight');
require('brace/theme/dracula');
require('brace/theme/chaos');

const NOTE_TAG_BAR_FEATURE_ENABLED = false;

class NoteTextComponent extends React.Component {
	constructor() {
		super();

		this.localSearchDefaultState = {
			query: '',
			selectedIndex: 0,
			resultCount: 0,
		};

		this.state = {
			note: null,
			folder: null,
			lastSavedNote: null,
			isLoading: true,
			webviewReady: false,
			scrollHeight: null,
			editorScrollTop: 0,
			newNote: null,
			noteTags: [],
			showRevisions: false,
			loading: false,

			// If the current note was just created, and the title has never been
			// changed by the user, this variable contains that note ID. Used
			// to automatically set the title.
			newAndNoTitleChangeNoteId: null,
			bodyHtml: '',
			lastRenderCssFiles: [],
			lastKeys: [],
			showLocalSearch: false,
			localSearch: Object.assign({}, this.localSearchDefaultState),
		};

		this.webviewRef_ = React.createRef();

		this.lastLoadedNoteId_ = null;

		this.webviewListeners_ = null;
		this.ignoreNextEditorScroll_ = false;
		this.scheduleSaveTimeout_ = null;
		this.restoreScrollTop_ = null;
		this.lastSetHtml_ = '';
		this.lastSetMarkers_ = '';
		this.lastSetMarkersOptions_ = {};
		this.selectionRange_ = null;
		this.lastComponentUpdateNoteId_ = null;
		this.noteSearchBar_ = React.createRef();

		// Complicated but reliable method to get editor content height
		// https://github.com/ajaxorg/ace/issues/2046
		this.editorMaxScrollTop_ = 0;
		this.onAfterEditorRender_ = () => {
			const r = this.editor_.editor.renderer;
			this.editorMaxScrollTop_ = Math.max(0, r.layerConfig.maxHeight - r.$size.scrollerHeight);

			if (this.restoreScrollTop_ !== null) {
				this.editorSetScrollTop(this.restoreScrollTop_);
				this.restoreScrollTop_ = null;
			}
		};

		this.onAlarmChange_ = event => {
			if (event.noteId === this.props.noteId) this.scheduleReloadNote(this.props);
		};
		this.onNoteTypeToggle_ = event => {
			if (event.noteId === this.props.noteId) this.scheduleReloadNote(this.props);
		};
		this.onTodoToggle_ = event => {
			if (event.noteId === this.props.noteId) this.scheduleReloadNote(this.props);
		};

		this.onEditorPaste_ = async (event = null) => {
			const formats = clipboard.availableFormats();
			for (let i = 0; i < formats.length; i++) {
				const format = formats[i].toLowerCase();
				const formatType = format.split('/')[0];

				if (formatType === 'image') {
					if (event) event.preventDefault();

					const image = clipboard.readImage();

					const fileExt = mimeUtils.toFileExtension(format);
					const filePath = `${Setting.value('tempDir')}/${md5(Date.now())}.${fileExt}`;

					await shim.writeImageToFile(image, format, filePath);
					await this.commandAttachFile([filePath]);
					await shim.fsDriver().remove(filePath);
				}
			}
		};

		this.onEditorKeyDown_ = event => {
			const lastKeys = this.state.lastKeys.slice();
			lastKeys.push(event.key);
			while (lastKeys.length > 2) lastKeys.splice(0, 1);
			this.setState({ lastKeys: lastKeys });
		};

		this.onEditorContextMenu_ = () => {
			const menu = new Menu();

			const selectedText = this.selectedText();
			const clipboardText = clipboard.readText();

			menu.append(
				new MenuItem({
					label: _('Cut'),
					enabled: !!selectedText,
					click: async () => {
						this.editorCutText();
					},
				})
			);

			menu.append(
				new MenuItem({
					label: _('Copy'),
					enabled: !!selectedText,
					click: async () => {
						this.editorCopyText();
					},
				})
			);

			menu.append(
				new MenuItem({
					label: _('Paste'),
					enabled: true,
					click: async () => {
						if (clipboardText) {
							this.editorPasteText();
						} else {
							// To handle pasting images
							this.onEditorPaste_();
						}
					},
				})
			);

			menu.popup(bridge().window());
		};

		this.onDrop_ = async event => {
			const dt = event.dataTransfer;
			const createFileURL = event.altKey;

			if (dt.types.indexOf('text/x-jop-note-ids') >= 0) {
				const noteIds = JSON.parse(dt.getData('text/x-jop-note-ids'));
				const linkText = [];
				for (let i = 0; i < noteIds.length; i++) {
					const note = await Note.load(noteIds[i]);
					linkText.push(Note.markdownTag(note));
				}

				this.wrapSelectionWithStrings('', '', '', linkText.join('\n'));
			}

			const files = dt.files;
			if (!files || !files.length) return;

			const filesToAttach = [];

			for (let i = 0; i < files.length; i++) {
				const file = files[i];
				if (!file.path) continue;
				filesToAttach.push(file.path);
			}

			await this.commandAttachFile(filesToAttach, createFileURL);
		};

		const updateSelectionRange = () => {
			if (!this.rawEditor()) {
				this.selectionRange_ = null;
				return;
			}

			const ranges = this.rawEditor()
				.getSelection()
				.getAllRanges();
			if (!ranges || !ranges.length || !this.state.note) {
				this.selectionRange_ = null;
			} else {
				this.selectionRange_ = ranges[0];
				if (process.platform === 'linux') {
					const textRange = this.textOffsetSelection();
					if (textRange.start != textRange.end) {
						clipboard.writeText(this.state.note.body.slice(
							Math.min(textRange.start, textRange.end),
							Math.max(textRange.end, textRange.start)), 'selection');
					}
				}
			}
		};

		this.aceEditor_selectionChange = () => {
			updateSelectionRange();
		};

		this.aceEditor_focus = () => {
			updateSelectionRange();
		};

		this.externalEditWatcher_noteChange = event => {
			if (!this.state.note || !this.state.note.id) return;
			if (event.id === this.state.note.id) {
				this.scheduleReloadNote(this.props);
			}
		};

		this.refreshResource = async event => {
			if (!this.state.note || !this.state.note.body) return;
			const resourceIds = await Note.linkedResourceIds(this.state.note.body);
			if (resourceIds.indexOf(event.id) >= 0) {
				shared.clearResourceCache();
				this.lastSetHtml_ = '';
				this.scheduleHtmlUpdate();
			}
		};

		this.noteSearchBar_change = query => {
			this.setState({
				localSearch: {
					query: query,
					selectedIndex: 0,
					timestamp: Date.now(),
				},
			});
		};

		const noteSearchBarNextPrevious = inc => {
			const ls = Object.assign({}, this.state.localSearch);
			ls.selectedIndex += inc;
			ls.timestamp = Date.now();
			if (ls.selectedIndex < 0) ls.selectedIndex = ls.resultCount - 1;
			if (ls.selectedIndex >= ls.resultCount) ls.selectedIndex = 0;

			this.setState({ localSearch: ls });
		};

		this.noteSearchBar_next = () => {
			noteSearchBarNextPrevious(+1);
		};

		this.noteSearchBar_previous = () => {
			noteSearchBarNextPrevious(-1);
		};

		this.noteSearchBar_close = () => {
			this.setState({
				showLocalSearch: false,
			});
		};

		this.titleField_keyDown = this.titleField_keyDown.bind(this);
		this.webview_ipcMessage = this.webview_ipcMessage.bind(this);
		this.webview_domReady = this.webview_domReady.bind(this);
		this.noteRevisionViewer_onBack = this.noteRevisionViewer_onBack.bind(this);
	}

	// Note:
	// - What's called "cursor position" is expressed as { row: x, column: y } and is how Ace Editor get/set the cursor position
	// - A "range" defines a selection with a start and end cusor position, expressed as { start: <CursorPos>, end: <CursorPos> }
	// - A "text offset" below is the absolute position of the cursor in the string, as would be used in the indexOf() function.
	// The functions below are used to convert between the different types.
	rangeToTextOffsets(range, body) {
		return {
			start: this.cursorPositionToTextOffset(range.start, body),
			end: this.cursorPositionToTextOffset(range.end, body),
		};
	}

	currentTextOffset() {
		return this.cursorPositionToTextOffset(this.editor_.editor.getCursorPosition(), this.state.note.body);
	}

	cursorPositionToTextOffset(cursorPos, body) {
		if (!this.editor_ || !this.editor_.editor || !this.state.note || !this.state.note.body) return 0;

		const noteLines = body.split('\n');

		let pos = 0;
		for (let i = 0; i < noteLines.length; i++) {
			if (i > 0) pos++; // Need to add the newline that's been removed in the split() call above

			if (i === cursorPos.row) {
				pos += cursorPos.column;
				break;
			} else {
				pos += noteLines[i].length;
			}
		}

		return pos;
	}

	textOffsetToCursorPosition(offset, body) {
		const lines = body.split('\n');
		let row = 0;
		let currentOffset = 0;
		for (let i = 0; i < lines.length; i++) {
			const line = lines[i];
			if (currentOffset + line.length >= offset) {
				return {
					row: row,
					column: offset - currentOffset,
				};
			}

			row++;
			currentOffset += line.length + 1;
		}
	}

	markupToHtml() {
		if (this.markupToHtml_) return this.markupToHtml_;
		this.markupToHtml_ = new MarkupToHtml({
			resourceBaseUrl: `file://${Setting.value('resourceDir')}/`,
		});
		return this.markupToHtml_;
	}

	async componentWillMount() {
		let note = null;
		let noteTags = [];
		if (this.props.newNote) {
			note = Object.assign({}, this.props.newNote);
		} else if (this.props.noteId) {
			note = await Note.load(this.props.noteId);
			noteTags = this.props.noteTags || [];
		}

		const folder = note ? Folder.byId(this.props.folders, note.parent_id) : null;

		this.setState({
			lastSavedNote: Object.assign({}, note),
			note: note,
			folder: folder,
			isLoading: false,
			noteTags: noteTags,
		});

		this.lastLoadedNoteId_ = note ? note.id : null;

		this.updateHtml(note ? note.markup_language : null, note && note.body ? note.body : '');

		eventManager.on('alarmChange', this.onAlarmChange_);
		eventManager.on('noteTypeToggle', this.onNoteTypeToggle_);
		eventManager.on('todoToggle', this.onTodoToggle_);

		shared.installResourceHandling(this.refreshResource);

		ExternalEditWatcher.instance().on('noteChange', this.externalEditWatcher_noteChange);
	}

	componentWillUnmount() {
		this.saveIfNeeded();

		this.markupToHtml_ = null;

		eventManager.removeListener('alarmChange', this.onAlarmChange_);
		eventManager.removeListener('noteTypeToggle', this.onNoteTypeToggle_);
		eventManager.removeListener('todoToggle', this.onTodoToggle_);

		shared.uninstallResourceHandling(this.refreshResource);

		ExternalEditWatcher.instance().off('noteChange', this.externalEditWatcher_noteChange);
	}

	componentDidUpdate() {
		// if (Setting.value('env') === 'dev' && this.webviewRef()) {
		// 	this.webviewRef().openDevTools();
		// 	return;
		// }

		if (this.webviewRef() && this.props.noteDevToolsVisible !== this.webviewRef().isDevToolsOpened()) {
			if (this.props.noteDevToolsVisible) {
				this.webviewRef().openDevTools();
			} else {
				this.webviewRef().closeDevTools();
			}
		}

		const currentNoteId = this.state.note ? this.state.note.id : null;
		if (this.lastComponentUpdateNoteId_ !== currentNoteId && this.editor_) {
			const undoManager = this.editor_.editor.getSession().getUndoManager();
			undoManager.reset();
			this.editor_.editor.getSession().setUndoManager(undoManager);
			this.lastComponentUpdateNoteId_ = currentNoteId;
		}
	}

	webviewRef() {
		if (!this.webviewRef_.current || !this.webviewRef_.current.wrappedInstance) return null;
		if (!this.webviewRef_.current.wrappedInstance.domReady()) return null;
		return this.webviewRef_.current.wrappedInstance;
	}

	async saveIfNeeded(saveIfNewNote = false, options = {}) {
		if (this.state.loading) return;

		const forceSave = saveIfNewNote && (this.state.note && !this.state.note.id);

		if (this.scheduleSaveTimeout_) clearTimeout(this.scheduleSaveTimeout_);
		this.scheduleSaveTimeout_ = null;
		if (!forceSave) {
			if (!shared.isModified(this)) return;
		}
		await shared.saveNoteButton_press(this, null, options);

		ExternalEditWatcher.instance().updateNoteFile(this.state.note);
	}

	async saveOneProperty(name, value) {
		if (this.state.note && !this.state.note.id) {
			const note = Object.assign({}, this.state.note);
			note[name] = value;
			this.setState({ note: note });
			this.scheduleSave();
		} else {
			await shared.saveOneProperty(this, name, value);
		}
	}

	scheduleSave() {
		if (this.scheduleSaveTimeout_) clearTimeout(this.scheduleSaveTimeout_);
		this.scheduleSaveTimeout_ = setTimeout(() => {
			this.saveIfNeeded();
		}, 500);
	}

	scheduleReloadNote(props, options = null) {
		if (this.scheduleReloadNoteIID_) {
			clearTimeout(this.scheduleReloadNoteIID_);
			this.scheduleReloadNoteIID_ = null;
		}

		this.scheduleReloadNoteIID_ = setTimeout(() => {
			this.reloadNote(props, options);
		}, 10);
	}

	// Generally, reloadNote() should not be called directly so that it's not called multiple times
	// from multiple places within a short interval of time. Instead use scheduleReloadNote() to
	// delay reloading a bit and make sure that only one reload operation is performed.
	async reloadNote(props, options = null) {
		if (!options) options = {};
		if (!('noReloadIfLocalChanges' in options)) options.noReloadIfLocalChanges = false;

		await this.saveIfNeeded();

		const defer = () => {
			this.setState({ loading: false });
		};

		this.setState({ loading: true });

		const stateNoteId = this.state.note ? this.state.note.id : null;
		let noteId = null;
		let note = null;
		let loadingNewNote = true;
		let parentFolder = null;
		let noteTags = [];
		let scrollPercent = 0;

		if (props.newNote) {
			// assign new note and prevent body from being null
			note = Object.assign({}, props.newNote, { body: '' });
			this.lastLoadedNoteId_ = null;
			if (note.template) note.body = TemplateUtils.render(note.template);
		} else {
			noteId = props.noteId;

			scrollPercent = this.props.lastEditorScrollPercents[noteId];
			if (!scrollPercent) scrollPercent = 0;

			loadingNewNote = stateNoteId !== noteId;
			noteTags = await Tag.tagsByNoteId(noteId);
			this.lastLoadedNoteId_ = noteId;
			note = noteId ? await Note.load(noteId) : null;
			if (noteId !== this.lastLoadedNoteId_) return defer(); // Race condition - current note was changed while this one was loading
			if (options.noReloadIfLocalChanges && this.isModified()) return defer();

			// If the note hasn't been changed, exit now
			if (this.state.note && note) {
				let diff = Note.diffObjects(this.state.note, note);
				delete diff.type_;
				if (!Object.getOwnPropertyNames(diff).length) return defer();
			}
		}

		this.markupToHtml_ = null;

		// If we are loading nothing (noteId == null), make sure to
		// set webviewReady to false too because the webview component
		// is going to be removed in render().
		const webviewReady = !!this.webviewRef_.current && this.state.webviewReady && (!!noteId || !!props.newNote);

		// Scroll back to top when loading new note
		if (loadingNewNote) {
			shared.clearResourceCache();

			this.editorMaxScrollTop_ = 0;

			// HACK: To go around a bug in Ace editor, we first set the scroll position to 1
			// and then (in the renderer callback) to the value we actually need. The first
			// operation helps clear the scroll position cache. See:
			// https://github.com/ajaxorg/ace/issues/2195
			this.editorSetScrollTop(1);
			this.restoreScrollTop_ = 0;

			// Only force focus on notes when creating a new note/todo
			if (this.props.newNote) {
				const focusSettingName = note.is_todo ? 'newTodoFocus' : 'newNoteFocus';

				requestAnimationFrame(() => {
					if (Setting.value(focusSettingName) === 'title') {
						if (this.titleField_) this.titleField_.focus();
					} else {
						if (this.editor_) this.editor_.editor.focus();
					}
				});
			}

			if (this.editor_) {
				this.editor_.editor.clearSelection();
				this.editor_.editor.moveCursorTo(0, 0);

				setTimeout(() => {
					// If we have an anchor hash, jump to that anchor
					if (this.props.selectedNoteHash) {
						this.webviewRef_.current.wrappedInstance.send('scrollToHash', this.props.selectedNoteHash);
					} else {
						// Otherwise restore the normal scroll position
						this.setEditorPercentScroll(scrollPercent ? scrollPercent : 0);
						this.setViewerPercentScroll(scrollPercent ? scrollPercent : 0);
					}
				}, 10);
			}

			if (note && note.body && Setting.value('sync.resourceDownloadMode') === 'auto') {
				const resourceIds = await Note.linkedResourceIds(note.body);
				await ResourceFetcher.instance().markForDownload(resourceIds);
			}
		}

		if (note) {
			parentFolder = Folder.byId(props.folders, note.parent_id);
		}

		let newState = {
			note: note,
			lastSavedNote: Object.assign({}, note),
			webviewReady: webviewReady,
			folder: parentFolder,
			lastKeys: [],
			noteTags: noteTags,
			showRevisions: false,
		};

		if (!note) {
			newState.newAndNoTitleChangeNoteId = null;
		} else if (note.id !== this.state.newAndNoTitleChangeNoteId) {
			newState.newAndNoTitleChangeNoteId = null;
		}

		if (!note || loadingNewNote) {
			newState.showLocalSearch = false;
			newState.localSearch = Object.assign({}, this.localSearchDefaultState);
		}

		this.lastSetHtml_ = '';
		this.lastSetMarkers_ = '';
		this.lastSetMarkersOptions_ = {};

		this.setState(newState);

		// https://github.com/laurent22/joplin/pull/893#discussion_r228025210
		// @Abijeet: Had to add this check. If not, was going into an infinite loop where state was getting updated repeatedly.
		// Since I'm updating the state, the componentWillReceiveProps was getting triggered again, where nextProps.newNote was still true, causing reloadNote to trigger again and again.
		// Notes from Laurent: The selected note tags are part of the global Redux state because they need to be updated whenever tags are changed or deleted
		// anywhere in the app. Thus it's not possible simple to load the tags here (as we won't have a way to know if they're updated afterwards).
		// Perhaps a better way would be to move that code in the middleware, check for TAGS_DELETE, TAGS_UPDATE, etc. actions and update the
		// selected note tags accordingly.
		if (NOTE_TAG_BAR_FEATURE_ENABLED) {
			if (!this.props.newNote) {
				this.props.dispatch({
					type: 'SET_NOTE_TAGS',
					items: noteTags,
				});
			}
		}

		// if (newState.note) await shared.refreshAttachedResources(this, newState.note.body);

		await this.updateHtml(newState.note ? newState.note.markup_language : null, newState.note ? newState.note.body : '');

		defer();
	}

	async componentWillReceiveProps(nextProps) {
		if (this.props.newNote !== nextProps.newNote && nextProps.newNote) {
			await this.scheduleReloadNote(nextProps);
		} else if ('noteId' in nextProps && nextProps.noteId !== this.props.noteId) {
			await this.scheduleReloadNote(nextProps);
		} else if ('noteTags' in nextProps && this.areNoteTagsModified(nextProps.noteTags, this.state.noteTags)) {
			this.setState({
				noteTags: nextProps.noteTags,
			});
		}

		if (nextProps.syncStarted !== this.props.syncStarted && 'syncStarted' in nextProps && !nextProps.syncStarted && !this.isModified()) {
			await this.scheduleReloadNote(nextProps, { noReloadIfLocalChanges: true });
		}

		if (nextProps.windowCommand) {
			this.doCommand(nextProps.windowCommand);
		}
	}

	isModified() {
		return shared.isModified(this);
	}

	areNoteTagsModified(newTags, oldTags) {
		if (!NOTE_TAG_BAR_FEATURE_ENABLED) return false;

		if (!oldTags) return true;

		if (newTags.length !== oldTags.length) return true;

		for (let i = 0; i < newTags.length; ++i) {
			let currNewTag = newTags[i];
			for (let j = 0; j < oldTags.length; ++j) {
				let currOldTag = oldTags[j];
				if (currOldTag.id === currNewTag.id && currOldTag.updated_time !== currNewTag.updated_time) {
					return true;
				}
			}
		}

		return false;
	}

	async noteRevisionViewer_onBack() {
		// When coming back from the revision viewer, the webview has been
		// unmounted so will need to reload. We set webviewReady to false
		// to make sure everything is reloaded as expected.
		this.setState({ showRevisions: false, webviewReady: false }, () => {
			this.lastSetHtml_ = '';
			this.scheduleReloadNote(this.props);
		});
	}

	title_changeText(event) {
		shared.noteComponent_change(this, 'title', event.target.value);
		this.setState({ newAndNoTitleChangeNoteId: null });
		this.scheduleSave();
	}

	toggleIsTodo_onPress() {
		shared.toggleIsTodo_onPress(this);
		this.scheduleSave();
	}

	async webview_ipcMessage(event) {
		const msg = event.channel ? event.channel : '';
		const args = event.args;
		const arg0 = args && args.length >= 1 ? args[0] : null;

		if (msg !== 'percentScroll') console.info(`Got ipc-message: ${msg}`, args);

		if (msg.indexOf('checkboxclick:') === 0) {
			// Ugly hack because setting the body here will make the scrollbar
			// go to some random position. So we save the scrollTop here and it
			// will be restored after the editor ref has been reset, and the
			// "afterRender" event has been called.
			this.restoreScrollTop_ = this.editorScrollTop();

			const newBody = shared.toggleCheckbox(msg, this.state.note.body);
			this.saveOneProperty('body', newBody);
		} else if (msg.indexOf('error:') === 0) {
			const s = msg.split(':');
			s.splice(0, 1);
			reg.logger().error(s.join(':'));
		} else if (msg === 'setMarkerCount') {
			const ls = Object.assign({}, this.state.localSearch);
			ls.resultCount = arg0;
			this.setState({ localSearch: ls });
		} else if (msg.indexOf('markForDownload:') === 0) {
			const s = msg.split(':');
			if (s.length < 2) throw new Error(`Invalid message: ${msg}`);
			ResourceFetcher.instance().markForDownload(s[1]);
		} else if (msg === 'percentScroll') {
			this.ignoreNextEditorScroll_ = true;
			this.setEditorPercentScroll(arg0);
		} else if (msg === 'contextMenu') {
			const itemType = arg0 && arg0.type;

			const menu = new Menu();

			if (itemType === 'image' || itemType === 'resource') {
				const resource = await Resource.load(arg0.resourceId);
				const resourcePath = Resource.fullPath(resource);

				menu.append(
					new MenuItem({
						label: _('Open...'),
						click: async () => {
							const ok = bridge().openExternal(`file://${resourcePath}`);
							if (!ok) bridge().showErrorMessageBox(_('This file could not be opened: %s', resourcePath));
						},
					})
				);

				menu.append(
					new MenuItem({
						label: _('Save as...'),
						click: async () => {
							const filePath = bridge().showSaveDialog({
								defaultPath: resource.filename ? resource.filename : resource.title,
							});
							if (!filePath) return;
							await fs.copy(resourcePath, filePath);
						},
					})
				);

				menu.append(
					new MenuItem({
						label: _('Copy path to clipboard'),
						click: async () => {
							clipboard.writeText(toSystemSlashes(resourcePath));
						},
					})
				);
			} else if (itemType === 'text') {
				menu.append(
					new MenuItem({
						label: _('Copy'),
						click: async () => {
							clipboard.writeText(arg0.textToCopy);
						},
					})
				);
			} else if (itemType === 'link') {
				menu.append(
					new MenuItem({
						label: _('Copy Link Address'),
						click: async () => {
							clipboard.writeText(arg0.textToCopy);
						},
					})
				);
			} else {
				reg.logger().error(`Unhandled item type: ${itemType}`);
				return;
			}

			menu.popup(bridge().window());
		} else if (msg.indexOf('joplin://') === 0) {
			const resourceUrlInfo = urlUtils.parseResourceUrl(msg);
			const itemId = resourceUrlInfo.itemId;
			const item = await BaseItem.loadItemById(itemId);

			if (!item) throw new Error(`No item with ID ${itemId}`);

			if (item.type_ === BaseModel.TYPE_RESOURCE) {
				const localState = await Resource.localState(item);
				if (localState.fetch_status !== Resource.FETCH_STATUS_DONE || !!item.encryption_blob_encrypted) {
					bridge().showErrorMessageBox(_('This attachment is not downloaded or not decrypted yet.'));
					return;
				}
				const filePath = Resource.fullPath(item);
				bridge().openItem(filePath);
			} else if (item.type_ === BaseModel.TYPE_NOTE) {
				this.props.dispatch({
					type: 'FOLDER_AND_NOTE_SELECT',
					folderId: item.parent_id,
					noteId: item.id,
					hash: resourceUrlInfo.hash,
					historyNoteAction: {
						id: this.state.note.id,
						parent_id: this.state.note.parent_id,
					},
				});
			} else {
				throw new Error(`Unsupported item type: ${item.type_}`);
			}
		} else if (urlUtils.urlProtocol(msg)) {
			if (msg.indexOf('file://') === 0) {
				// When using the file:// protocol, openExternal doesn't work (does nothing) with URL-encoded paths
				require('electron').shell.openExternal(urlDecode(msg));
			} else {
				require('electron').shell.openExternal(msg);
			}
		} else if (msg.indexOf('#') === 0) {
			// This is an internal anchor, which is handled by the WebView so skip this case
		} else {
			bridge().showErrorMessageBox(_('Unsupported link or message: %s', msg));
		}
	}

	editorMaxScroll() {
		return this.editorMaxScrollTop_;
	}

	editorScrollTop() {
		return this.editor_.editor.getSession().getScrollTop();
	}

	editorSetScrollTop(v) {
		if (!this.editor_) return;
		this.editor_.editor.getSession().setScrollTop(v);
	}

	setEditorPercentScroll(p) {
		const noteId = this.props.noteId;

		if (noteId) {
			this.props.dispatch({
				type: 'EDITOR_SCROLL_PERCENT_SET',
				noteId: noteId,
				percent: p,
			});
		}

		this.editorSetScrollTop(p * this.editorMaxScroll());
	}

	setViewerPercentScroll(p) {
		const noteId = this.props.noteId;

		if (noteId) {
			this.props.dispatch({
				type: 'EDITOR_SCROLL_PERCENT_SET',
				noteId: noteId,
				percent: p,
			});
		}

		if (this.webviewRef_.current) this.webviewRef_.current.wrappedInstance.send('setPercentScroll', p);
	}

	editor_scroll() {
		if (this.ignoreNextEditorScroll_) {
			this.ignoreNextEditorScroll_ = false;
			return;
		}

		const m = this.editorMaxScroll();
		const percent = m ? this.editorScrollTop() / m : 0;

		this.setViewerPercentScroll(percent);
	}

	webview_domReady() {
		if (!this.webviewRef_.current) return;

		this.setState({
			webviewReady: true,
		});

		if (Setting.value('env') === 'dev') {
			// this.webviewRef_.current.wrappedInstance.openDevTools();
		}
	}

	editor_ref(element) {
		if (this.editor_ === element) return;

		if (this.editor_) {
			this.editor_.editor.renderer.off('afterRender', this.onAfterEditorRender_);
			document.querySelector('#note-editor').removeEventListener('paste', this.onEditorPaste_, true);
			document.querySelector('#note-editor').removeEventListener('keydown', this.onEditorKeyDown_);
			document.querySelector('#note-editor').removeEventListener('contextmenu', this.onEditorContextMenu_);
		}

		this.editor_ = element;

		if (this.editor_) {
			this.editor_.editor.renderer.on('afterRender', this.onAfterEditorRender_);

			const cancelledKeys = [];
			const letters = ['F', 'T', 'P', 'Q', 'L', ',', 'G', 'K'];
			for (let i = 0; i < letters.length; i++) {
				const l = letters[i];
				cancelledKeys.push(`Ctrl+${l}`);
				cancelledKeys.push(`Command+${l}`);
			}

			for (let i = 0; i < cancelledKeys.length; i++) {
				const k = cancelledKeys[i];
				this.editor_.editor.commands.bindKey(k, () => {
					// HACK: Ace doesn't seem to provide a way to override its shortcuts, but throwing
					// an exception from this undocumented function seems to cancel it without any
					// side effect.
					// https://stackoverflow.com/questions/36075846
					throw new Error(`HACK: Overriding Ace Editor shortcut: ${k}`);
				});
			}

			document.querySelector('#note-editor').addEventListener('paste', this.onEditorPaste_, true);
			document.querySelector('#note-editor').addEventListener('keydown', this.onEditorKeyDown_);
			document.querySelector('#note-editor').addEventListener('contextmenu', this.onEditorContextMenu_);

			const lineLeftSpaces = function(line) {
				let output = '';
				for (let i = 0; i < line.length; i++) {
					if ([' ', '\t'].indexOf(line[i]) >= 0) {
						output += line[i];
					} else {
						break;
					}
				}
				return output;
			};

			// Disable Markdown auto-completion (eg. auto-adding a dash after a line with a dash.
			// https://github.com/ajaxorg/ace/issues/2754
			const that = this; // The "this" within the function below refers to something else
			this.editor_.editor.getSession().getMode().getNextLineIndent = function(state, line) {
				const ls = that.state.lastKeys;
				if (ls.length >= 2 && ls[ls.length - 1] === 'Enter' && ls[ls.length - 2] === 'Enter') return this.$getIndent(line);

				const leftSpaces = lineLeftSpaces(line);
				const lineNoLeftSpaces = line.trimLeft();

				if (lineNoLeftSpaces.indexOf('- [ ] ') === 0 || lineNoLeftSpaces.indexOf('- [x] ') === 0 || lineNoLeftSpaces.indexOf('- [X] ') === 0) return `${leftSpaces}- [ ] `;
				if (lineNoLeftSpaces.indexOf('- ') === 0) return `${leftSpaces}- `;
				if (lineNoLeftSpaces.indexOf('* ') === 0 && line.trim() !== '* * *') return `${leftSpaces}* `;

				const bulletNumber = markdownUtils.olLineNumber(lineNoLeftSpaces);
				if (bulletNumber) return `${leftSpaces + (bulletNumber + 1)}. `;

				return this.$getIndent(line);
			};
		}
	}

	aceEditor_change(body) {
		shared.noteComponent_change(this, 'body', body);
		this.scheduleHtmlUpdate();
		this.scheduleSave();
	}

	scheduleHtmlUpdate(timeout = 500) {
		if (this.scheduleHtmlUpdateIID_) {
			clearTimeout(this.scheduleHtmlUpdateIID_);
			this.scheduleHtmlUpdateIID_ = null;
		}

		if (timeout) {
			this.scheduleHtmlUpdateIID_ = setTimeout(() => {
				this.updateHtml();
			}, timeout);
		} else {
			this.updateHtml();
		}
	}

	async updateHtml(markupLanguage = null, body = null, options = null) {
		if (!options) options = {};
		if (!('useCustomCss' in options)) options.useCustomCss = true;

		let bodyToRender = body;

		if (bodyToRender === null) {
			bodyToRender = this.state.note && this.state.note.body ? this.state.note.body : '';
			markupLanguage = this.state.note ? this.state.note.markup_language : Note.MARKUP_LANGUAGE_MARKDOWN;
		}

		if (!markupLanguage) markupLanguage = Note.MARKUP_LANGUAGE_MARKDOWN;

		const resources = await shared.attachedResources(bodyToRender);

		const theme = themeStyle(this.props.theme);

		const mdOptions = {
			codeTheme: theme.codeThemeCss,
			postMessageSyntax: 'ipcProxySendToHost',
			userCss: options.useCustomCss ? this.props.customCss : '',
			resources: resources,
			codeHighlightCacheKey: this.state.note ? this.state.note.id : null,
		};

		const visiblePanes = this.props.visiblePanes || ['editor', 'viewer'];

		if (!bodyToRender.trim() && visiblePanes.indexOf('viewer') >= 0 && visiblePanes.indexOf('editor') < 0) {
			// Fixes https://github.com/laurent22/joplin/issues/217
			bodyToRender = `<i>${_('This note has no content. Click on "%s" to toggle the editor and edit the note.', _('Layout'))}</i>`;
		}

		const result = this.markupToHtml().render(markupLanguage, bodyToRender, theme, mdOptions);

		this.setState({
			bodyHtml: result.html,
			lastRenderCssFiles: result.cssFiles,
		});
	}

	titleField_keyDown(event) {
		const keyCode = event.keyCode;

		if (keyCode === 9) {
			// TAB
			event.preventDefault();

			if (event.shiftKey) {
				this.props.dispatch({
					type: 'WINDOW_COMMAND',
					name: 'focusElement',
					target: 'noteList',
				});
			} else {
				this.props.dispatch({
					type: 'WINDOW_COMMAND',
					name: 'focusElement',
					target: 'noteBody',
				});
			}
		}
	}

	async doCommand(command) {
		if (!command) return;

		let fn = null;

		if (command.name === 'exportPdf') {
			fn = this.commandSavePdf;
		} else if (command.name === 'print') {
			fn = this.commandPrint;
		}

		if (this.state.note) {
			if (command.name === 'textBold') {
				fn = this.commandTextBold;
			} else if (command.name === 'textItalic') {
				fn = this.commandTextItalic;
			} else if (command.name === 'textLink') {
				fn = this.commandTextLink;
			} else if (command.name === 'insertDateTime') {
				fn = this.commandDateTime;
			} else if (command.name === 'commandStartExternalEditing') {
				fn = this.commandStartExternalEditing;
			} else if (command.name === 'showLocalSearch') {
				fn = this.commandShowLocalSearch;
			} else if (command.name === 'textCode') {
				fn = this.commandTextCode;
			} else if (command.name === 'insertTemplate') {
				fn = () => {
					return this.commandTemplate(command.value);
				};
			}
		}

		if (command.name === 'focusElement' && command.target === 'noteTitle') {
			fn = () => {
				if (!this.titleField_) return;
				this.titleField_.focus();
			};
		}

		if (command.name === 'focusElement' && command.target === 'noteBody') {
			fn = () => {
				if (!this.editor_) return;
				this.editor_.editor.focus();
			};
		}

		if (!fn) return;

		this.props.dispatch({
			type: 'WINDOW_COMMAND',
			name: null,
		});

		requestAnimationFrame(() => {
			fn = fn.bind(this);
			fn();
		});
	}

	commandShowLocalSearch() {
		if (this.state.showLocalSearch) {
			this.noteSearchBar_.current.wrappedInstance.focus();
		} else {
			this.setState({ showLocalSearch: true });
		}

		this.props.dispatch({
			type: 'NOTE_VISIBLE_PANES_SET',
			panes: ['editor', 'viewer'],
		});
	}

	async commandAttachFile(filePaths = null, createFileURL = false) {
		if (!filePaths) {
			filePaths = bridge().showOpenDialog({
				properties: ['openFile', 'createDirectory', 'multiSelections'],
			});
			if (!filePaths || !filePaths.length) return;
		}

		await this.saveIfNeeded(true);
		let note = await Note.load(this.state.note.id);

		const position = this.currentTextOffset();

		for (let i = 0; i < filePaths.length; i++) {
			const filePath = filePaths[i];
			try {
				reg.logger().info(`Attaching ${filePath}`);
				note = await shim.attachFileToNote(note, filePath, position, createFileURL);
				reg.logger().info('File was attached.');
				this.setState({
					note: Object.assign({}, note),
					lastSavedNote: Object.assign({}, note),
				});

				this.updateHtml(note.markup_language, note.body);
			} catch (error) {
				reg.logger().error(error);
				bridge().showErrorMessageBox(error.message);
			}
		}
	}

	async commandSetAlarm() {
		await this.saveIfNeeded(true);

		this.props.dispatch({
			type: 'WINDOW_COMMAND',
			name: 'editAlarm',
			noteId: this.state.note.id,
		});
	}

	// helper function to style the title for printing
	title_(title) {
		return `<div style="font-size: 2em; font-weight: bold; border-bottom: 1px solid rgb(230,230,230); padding-bottom: .3em;">${title}</div><br>`;
	}

	async printTo_(target, options) {
		if (this.props.selectedNoteIds.length !== 1 || !this.webviewRef_.current) {
			throw new Error(_('Only one note can be printed or exported to PDF at a time.'));
		}

		const previousBody = this.state.note.body;
		const tempBody = `${this.title_(this.state.note.title)}\n\n${previousBody}`;

		const previousTheme = Setting.value('theme');
		Setting.setValue('theme', Setting.THEME_LIGHT);
		this.lastSetHtml_ = '';
		await this.updateHtml(this.state.note.markup_language, tempBody, { useCustomCss: true });
		this.forceUpdate();

		const restoreSettings = async () => {
			Setting.setValue('theme', previousTheme);
			this.lastSetHtml_ = '';
			await this.updateHtml(this.state.note.markup_language, previousBody);
			this.forceUpdate();
		};

		setTimeout(() => {
			if (target === 'pdf') {
				this.webviewRef_.current.wrappedInstance.printToPDF({ printBackground: true, pageSize: Setting.value('export.pdfPageSize'), landscape: Setting.value('export.pdfPageOrientation') === 'landscape' }, (error, data) => {
					restoreSettings();

					if (error) {
						bridge().showErrorMessageBox(error.message);
					} else {
						shim.fsDriver().writeFile(options.path, data, 'buffer');
					}
				});
			} else if (target === 'printer') {
				this.webviewRef_.current.wrappedInstance.print({ printBackground: true });
				restoreSettings();
			}
		}, 100);
	}

	async commandSavePdf() {
		try {
			if (!this.state.note) throw new Error(_('Only one note can be printed or exported to PDF at a time.'));

			const path = bridge().showSaveDialog({
				filters: [{ name: _('PDF File'), extensions: ['pdf'] }],
				defaultPath: safeFilename(this.state.note.title),
			});

			if (!path) return;

			await this.printTo_('pdf', { path: path });
		} catch (error) {
			bridge().showErrorMessageBox(error.message);
		}
	}

	async commandPrint() {
		try {
			await this.printTo_('printer');
		} catch (error) {
			bridge().showErrorMessageBox(error.message);
		}
	}

	async commandStartExternalEditing() {
		try {
			await this.saveIfNeeded(true, {
				autoTitle: false,
			});
			await ExternalEditWatcher.instance().openAndWatch(this.state.note);
		} catch (error) {
			bridge().showErrorMessageBox(_('Error opening note in editor: %s', error.message));
		}
	}

	async commandStopExternalEditing() {
		ExternalEditWatcher.instance().stopWatching(this.state.note.id);
	}

	async commandSetTags() {
		await this.saveIfNeeded(true);

		this.props.dispatch({
			type: 'WINDOW_COMMAND',
			name: 'setTags',
			noteId: this.state.note.id,
		});
	}

	// Returns the actual Ace Editor instance (not the React wrapper)
	rawEditor() {
		return this.editor_ && this.editor_.editor ? this.editor_.editor : null;
	}

	updateEditorWithDelay(fn) {
		setTimeout(() => {
			if (!this.rawEditor()) return;
			fn(this.rawEditor());
		}, 10);
	}

	lineAtRow(row) {
		if (!this.state.note) return '';
		const body = this.state.note.body;
		const lines = body.split('\n');
		if (row < 0 || row >= lines.length) return '';
		return lines[row];
	}

	selectedText() {
		if (!this.state.note || !this.state.note.body) return '';

		const selection = this.textOffsetSelection();
		if (!selection || selection.start === selection.end) return '';

		return this.state.note.body.substr(selection.start, selection.end - selection.start);
	}

	editorCopyText() {
		clipboard.writeText(this.selectedText());
	}

	editorCutText() {
		const selectedText = this.selectedText();
		if (!selectedText) return;

		clipboard.writeText(selectedText);

		const s = this.textOffsetSelection();
		if (!s || s.start === s.end) return '';

		const s1 = this.state.note.body.substr(0, s.start);
		const s2 = this.state.note.body.substr(s.end);

		shared.noteComponent_change(this, 'body', s1 + s2);

		this.updateEditorWithDelay(editor => {
			const range = this.selectionRange_;
			range.setStart(range.start.row, range.start.column);
			range.setEnd(range.start.row, range.start.column);
			editor
				.getSession()
				.getSelection()
				.setSelectionRange(range, false);
			editor.focus();
		}, 10);
	}

	editorPasteText() {
		this.wrapSelectionWithStrings('', '', '', clipboard.readText());
	}

	selectionRangePreviousLine() {
		if (!this.selectionRange_) return '';
		const row = this.selectionRange_.start.row;
		return this.lineAtRow(row - 1);
	}

	selectionRangeCurrentLine() {
		if (!this.selectionRange_) return '';
		const row = this.selectionRange_.start.row;
		return this.lineAtRow(row);
	}

	textOffsetSelection() {
		return this.selectionRange_ ? this.rangeToTextOffsets(this.selectionRange_, this.state.note.body) : null;
	}

	wrapSelectionWithStrings(string1, string2 = '', defaultText = '', replacementText = '') {
		if (!this.rawEditor() || !this.state.note) return;

		const selection = this.textOffsetSelection();

		let newBody = this.state.note.body;

		if (selection && selection.start !== selection.end) {
			const s1 = this.state.note.body.substr(0, selection.start);
			const s2 = replacementText ? replacementText : this.state.note.body.substr(selection.start, selection.end - selection.start);
			const s3 = this.state.note.body.substr(selection.end);
			newBody = s1 + string1 + s2 + string2 + s3;

			const r = this.selectionRange_;

			// Because some insertion strings will have newlines, we'll need to account for them
			const str1Split = string1.split(/\r?\n/);

			// Add the number of newlines to the row
			// and add the length of the final line to the column (for strings with no newlines this is the string length)
			const newRange = {
				start: { row: r.start.row + str1Split.length - 1,
					column: r.start.column + str1Split[str1Split.length - 1].length },
				end: { row: r.end.row + str1Split.length - 1,
					column: r.end.column + str1Split[str1Split.length - 1].length },
			};

			if (replacementText) {
				const diff = replacementText.length - (selection.end - selection.start);
				newRange.end.column += diff;
			}

			this.updateEditorWithDelay(editor => {
				const range = this.selectionRange_;
				range.setStart(newRange.start.row, newRange.start.column);
				range.setEnd(newRange.end.row, newRange.end.column);
				editor
					.getSession()
					.getSelection()
					.setSelectionRange(range, false);
				editor.focus();
			});
		} else {
			let middleText = replacementText ? replacementText : defaultText;
			const textOffset = this.currentTextOffset();
			const s1 = this.state.note.body.substr(0, textOffset);
			const s2 = this.state.note.body.substr(textOffset);
			newBody = s1 + string1 + middleText + string2 + s2;

			const p = this.textOffsetToCursorPosition(textOffset + string1.length, newBody);
			const newRange = {
				start: { row: p.row, column: p.column },
				end: { row: p.row, column: p.column + middleText.length },
			};

			// BUG!! If replacementText contains newline characters, the logic
			// to select the new text will not work.

			this.updateEditorWithDelay(editor => {
				if (middleText && newRange) {
					const range = this.selectionRange_;
					range.setStart(newRange.start.row, newRange.start.column);
					range.setEnd(newRange.end.row, newRange.end.column);
					editor
						.getSession()
						.getSelection()
						.setSelectionRange(range, false);
				} else {
					for (let i = 0; i < string1.length; i++) {
						editor
							.getSession()
							.getSelection()
							.moveCursorRight();
					}
				}
				editor.focus();
			}, 10);
		}

		shared.noteComponent_change(this, 'body', newBody);
		this.scheduleHtmlUpdate();
		this.scheduleSave();
	}

	commandTextBold() {
		this.wrapSelectionWithStrings('**', '**', _('strong text'));
	}

	commandTextItalic() {
		this.wrapSelectionWithStrings('*', '*', _('emphasized text'));
	}

	commandDateTime() {
		this.wrapSelectionWithStrings(time.formatMsToLocal(new Date().getTime()));
	}

	commandTextCode() {
		const selection = this.textOffsetSelection();
		let string = this.state.note.body.substr(selection.start, selection.end - selection.start);

		// Look for newlines
		let match = string.match(/\r?\n/);

		if (match && match.length > 0) {
			// Follow the same newline style
			this.wrapSelectionWithStrings(`\`\`\`${match[0]}`, `${match[0]}\`\`\``);
		} else {
			this.wrapSelectionWithStrings('`', '`');
		}
	}

	commandTemplate(value) {
		this.wrapSelectionWithStrings(TemplateUtils.render(value));
	}

	addListItem(string1, string2 = '', defaultText = '') {
		const currentLine = this.selectionRangeCurrentLine();
		let newLine = '\n';
		if (!currentLine) newLine = '';
		this.wrapSelectionWithStrings(newLine + string1, string2, defaultText);
	}

	commandTextCheckbox() {
		this.addListItem('- [ ] ', '', _('List item'));
	}

	commandTextListUl() {
		this.addListItem('- ', '', _('List item'));
	}

	commandTextListOl() {
		let bulletNumber = markdownUtils.olLineNumber(this.selectionRangeCurrentLine());
		if (!bulletNumber) bulletNumber = markdownUtils.olLineNumber(this.selectionRangePreviousLine());
		if (!bulletNumber) bulletNumber = 0;
		this.addListItem(`${bulletNumber + 1}. `, '', _('List item'));
	}

	commandTextHeading() {
		this.addListItem('## ');
	}

	commandTextHorizontalRule() {
		this.addListItem('* * *');
	}

	async commandTextLink() {
		const url = await dialogs.prompt(_('Insert Hyperlink'));
		this.wrapSelectionWithStrings('[', `](${url})`);
	}

	itemContextMenu() {
		const note = this.state.note;
		if (!note) return;

		const menu = new Menu();

		menu.append(
			new MenuItem({
				label: _('Attach file'),
				click: async () => {
					return this.commandAttachFile();
				},
			})
		);

		menu.append(
			new MenuItem({
				label: _('Tags'),
				click: async () => {
					return this.commandSetTags();
				},
			})
		);

		if (note.is_todo) {
			menu.append(
				new MenuItem({
					label: _('Set alarm'),
					click: async () => {
						return this.commandSetAlarm();
					},
				})
			);
		}

		menu.popup(bridge().window());
	}

	createToolbarItems(note, editorIsVisible) {
		const toolbarItems = [];
		if (note && this.state.folder && ['Search', 'Tag'].includes(this.props.notesParentType)) {
			toolbarItems.push({
				title: _('In: %s', substrWithEllipsis(this.state.folder.title, 0, 16)),
				iconName: 'fa-book',
				onClick: () => {
					this.props.dispatch({
						type: 'FOLDER_AND_NOTE_SELECT',
						folderId: this.state.folder.id,
						noteId: note.id,
					});
				},
			});
		}

		if (this.props.historyNotes.length) {
			toolbarItems.push({
				tooltip: _('Back'),
				iconName: 'fa-arrow-left',
				onClick: () => {
					if (!this.props.historyNotes.length) return;

					const lastItem = this.props.historyNotes[this.props.historyNotes.length - 1];

					this.props.dispatch({
						type: 'FOLDER_AND_NOTE_SELECT',
						folderId: lastItem.parent_id,
						noteId: lastItem.id,
						historyNoteAction: 'pop',
					});
				},
			});
		}

		if (note.markup_language === Note.MARKUP_LANGUAGE_MARKDOWN && editorIsVisible) {
			toolbarItems.push({
				tooltip: _('Bold'),
				iconName: 'fa-bold',
				onClick: () => {
					return this.commandTextBold();
				},
			});

			toolbarItems.push({
				tooltip: _('Italic'),
				iconName: 'fa-italic',
				onClick: () => {
					return this.commandTextItalic();
				},
			});

			toolbarItems.push({
				type: 'separator',
			});

			toolbarItems.push({
				tooltip: _('Hyperlink'),
				iconName: 'fa-link',
				onClick: () => {
					return this.commandTextLink();
				},
			});

			toolbarItems.push({
				tooltip: _('Code'),
				iconName: 'fa-code',
				onClick: () => {
					return this.commandTextCode();
				},
			});

			toolbarItems.push({
				tooltip: _('Attach file'),
				iconName: 'fa-paperclip',
				onClick: () => {
					return this.commandAttachFile();
				},
			});

			toolbarItems.push({
				type: 'separator',
			});

			toolbarItems.push({
				tooltip: _('Numbered List'),
				iconName: 'fa-list-ol',
				onClick: () => {
					return this.commandTextListOl();
				},
			});

			toolbarItems.push({
				tooltip: _('Bulleted List'),
				iconName: 'fa-list-ul',
				onClick: () => {
					return this.commandTextListUl();
				},
			});

			toolbarItems.push({
				tooltip: _('Checkbox'),
				iconName: 'fa-check-square',
				onClick: () => {
					return this.commandTextCheckbox();
				},
			});

			toolbarItems.push({
				tooltip: _('Heading'),
				iconName: 'fa-header',
				onClick: () => {
					return this.commandTextHeading();
				},
			});

			toolbarItems.push({
				tooltip: _('Horizontal Rule'),
				iconName: 'fa-ellipsis-h',
				onClick: () => {
					return this.commandTextHorizontalRule();
				},
			});

			toolbarItems.push({
				tooltip: _('Insert Date Time'),
				iconName: 'fa-calendar-plus-o',
				onClick: () => {
					return this.commandDateTime();
				},
			});

			toolbarItems.push({
				type: 'separator',
			});
		}

		if (note && this.props.watchedNoteFiles.indexOf(note.id) >= 0) {
			toolbarItems.push({
				tooltip: _('Click to stop external editing'),
				title: _('Watching...'),
				iconName: 'fa-external-link',
				onClick: () => {
					return this.commandStopExternalEditing();
				},
			});
		} else {
			toolbarItems.push({
				tooltip: _('Edit in external editor'),
				iconName: 'fa-external-link',
				onClick: () => {
					return this.commandStartExternalEditing();
				},
			});
		}

		toolbarItems.push({
			tooltip: _('Tags'),
			iconName: 'fa-tags',
			onClick: () => {
				return this.commandSetTags();
			},
		});

		if (note.is_todo) {
			const item = {
				iconName: 'fa-clock-o',
				enabled: !note.todo_completed,
				onClick: () => {
					return this.commandSetAlarm();
				},
			};
			if (Note.needAlarm(note)) {
				item.title = time.formatMsToLocal(note.todo_due);
			} else {
				item.tooltip = _('Set alarm');
			}
			toolbarItems.push(item);
		}

		toolbarItems.push({
			tooltip: _('Note properties'),
			iconName: 'fa-info-circle',
			onClick: () => {
				const n = this.state.note;
				if (!n || !n.id) return;

				this.props.dispatch({
					type: 'WINDOW_COMMAND',
					name: 'commandNoteProperties',
					noteId: n.id,
					onRevisionLinkClick: () => {
						this.setState({ showRevisions: true });
					},
				});
			},
		});

		return toolbarItems;
	}

	renderNoNotes(rootStyle) {
		const emptyDivStyle = Object.assign(
			{
				backgroundColor: 'black',
				opacity: 0.1,
			},
			rootStyle
		);
		return <div style={emptyDivStyle}></div>;
	}

	renderMultiNotes(rootStyle) {
		const theme = themeStyle(this.props.theme);

		const multiNotesButton_click = item => {
			if (item.submenu) {
				item.submenu.popup(bridge().window());
			} else {
				item.click();
			}
		};

		const menu = NoteListUtils.makeContextMenu(this.props.selectedNoteIds, {
			notes: this.props.notes,
			dispatch: this.props.dispatch,
		});

		const buttonStyle = Object.assign({}, theme.buttonStyle, {
			marginBottom: 10,
		});

		const itemComps = [];
		const menuItems = menu.items;

		for (let i = 0; i < menuItems.length; i++) {
			const item = menuItems[i];
			if (!item.enabled) continue;

			itemComps.push(
				<button key={item.label} style={buttonStyle} onClick={() => multiNotesButton_click(item)}>
					{item.label}
				</button>
			);
		}

		rootStyle = Object.assign({}, rootStyle, {
			paddingTop: rootStyle.paddingLeft,
			display: 'inline-flex',
			justifyContent: 'center',
		});

		return (
			<div style={rootStyle}>
				<div style={{ display: 'flex', flexDirection: 'column' }}>{itemComps}</div>
			</div>
		);
	}

	render() {
		const style = this.props.style;
		const note = this.state.note;
		const body = note && note.body ? note.body : '';
		const markupLanguage = note ? note.markup_language : Note.MARKUP_LANGUAGE_MARKDOWN;
		const theme = themeStyle(this.props.theme);
		const visiblePanes = this.props.visiblePanes || ['editor', 'viewer'];
		const isTodo = note && !!note.is_todo;

		const borderWidth = 1;

		const rootStyle = Object.assign(
			{
				borderLeft: `${borderWidth}px solid ${theme.dividerColor}`,
				boxSizing: 'border-box',
				paddingLeft: 10,
				paddingRight: 0,
			},
			style
		);

		const innerWidth = rootStyle.width - rootStyle.paddingLeft - rootStyle.paddingRight - borderWidth;

		if (this.state.showRevisions && note && note.id) {
			rootStyle.paddingRight = rootStyle.paddingLeft;
			rootStyle.paddingTop = rootStyle.paddingLeft;
			rootStyle.paddingBottom = rootStyle.paddingLeft;
			rootStyle.display = 'inline-flex';
			return (
				<div style={rootStyle}>
					<NoteRevisionViewer noteId={note.id} customCss={this.props.customCss} onBack={this.noteRevisionViewer_onBack} />
				</div>
			);
		}

		if (this.props.selectedNoteIds.length > 1) {
			return this.renderMultiNotes(rootStyle);
		} else if (!note || !!note.encryption_applied) {
			// || (note && !this.props.newNote && this.props.noteId && note.id !== this.props.noteId)) { // note.id !== props.noteId is when the note has not been loaded yet, and the previous one is still in the state
			return this.renderNoNotes(rootStyle);
		}

		const titleBarStyle = {
			width: innerWidth - rootStyle.paddingLeft,
			height: 30,
			boxSizing: 'border-box',
			marginTop: 10,
			marginBottom: 0,
			display: 'flex',
			flexDirection: 'row',
			alignItems: 'center',
		};

		const titleEditorStyle = {
			flex: 1,
			display: 'inline-block',
			paddingTop: 5,
			paddingBottom: 5,
			paddingLeft: 8,
			paddingRight: 8,
			marginRight: rootStyle.paddingLeft,
			color: theme.color,
			backgroundColor: theme.backgroundColor,
			border: '1px solid',
			borderColor: theme.dividerColor,
			fontSize: theme.fontSize,
		};

		const toolbarStyle = {};

		const tagStyle = {
			marginBottom: 10,
			height: 30,
		};

		const searchBarHeight = this.state.showLocalSearch ? 35 : 0;

		let bottomRowHeight = 0;
		if (NOTE_TAG_BAR_FEATURE_ENABLED) {
			bottomRowHeight = rootStyle.height - titleBarStyle.height - titleBarStyle.marginBottom - titleBarStyle.marginTop - theme.toolbarHeight - tagStyle.height - tagStyle.marginBottom;
		} else {
			toolbarStyle.marginBottom = 10;
			bottomRowHeight = rootStyle.height - titleBarStyle.height - titleBarStyle.marginBottom - titleBarStyle.marginTop - theme.toolbarHeight - toolbarStyle.marginBottom;
		}

		bottomRowHeight -= searchBarHeight;

		const viewerStyle = {
			width: Math.floor(innerWidth / 2),
			height: bottomRowHeight,
			overflow: 'hidden',
			float: 'left',
			verticalAlign: 'top',
			boxSizing: 'border-box',
		};

		const paddingTop = 14;

		const editorStyle = {
			width: innerWidth - viewerStyle.width,
			height: bottomRowHeight - paddingTop,
			overflowY: 'hidden',
			float: 'left',
			verticalAlign: 'top',
			paddingTop: `${paddingTop}px`,
			lineHeight: `${theme.textAreaLineHeight}px`,
			fontSize: `${theme.editorFontSize}px`,
			color: theme.color,
			backgroundColor: theme.backgroundColor,
			editorTheme: theme.editorTheme,
		};

		if (visiblePanes.indexOf('viewer') < 0) {
			// Note: setting webview.display to "none" is currently not supported due
			// to this bug: https://github.com/electron/electron/issues/8277
			// So instead setting the width 0.
			viewerStyle.width = 0;
			editorStyle.width = innerWidth;
		}

		if (visiblePanes.indexOf('editor') < 0) {
			// Note: Ideally we'd set the display to "none" to take the editor out
			// of the DOM but if we do that, certain things won't work, in particular
			// things related to scroll, which are based on the editor. See
			// editorScrollTop_, restoreScrollTop_, etc.
			editorStyle.width = 0;
			viewerStyle.width = innerWidth;
		}

		if (visiblePanes.indexOf('viewer') >= 0 && visiblePanes.indexOf('editor') >= 0) {
			viewerStyle.borderLeft = `1px solid ${theme.dividerColor}`;
		} else {
			viewerStyle.borderLeft = 'none';
		}

		if (this.state.webviewReady && this.webviewRef_.current) {
			let html = this.state.bodyHtml;

			const htmlHasChanged = this.lastSetHtml_ !== html;
			if (htmlHasChanged) {
				let options = {
					cssFiles: this.state.lastRenderCssFiles,
					downloadResources: Setting.value('sync.resourceDownloadMode'),
				};
				this.webviewRef_.current.wrappedInstance.send('setHtml', html, options);
				this.lastSetHtml_ = html;
			}

			let keywords = [];
			const markerOptions = {};

			if (this.state.showLocalSearch) {
				keywords = [
					{
						type: 'text',
						value: this.state.localSearch.query,
						accuracy: 'partially',
					},
				];
				markerOptions.selectedIndex = this.state.localSearch.selectedIndex;
				markerOptions.separateWordSearch = false;
				markerOptions.searchTimestamp = this.state.localSearch.timestamp;
			} else {
				const search = BaseModel.byId(this.props.searches, this.props.selectedSearchId);
				if (search) {
					const parsedQuery = SearchEngine.instance().parseQuery(search.query_pattern);
					keywords = SearchEngine.instance().allParsedQueryTerms(parsedQuery);
				}
			}

			const keywordHash = JSON.stringify(keywords);
			if (htmlHasChanged || keywordHash !== this.lastSetMarkers_ || !ObjectUtils.fieldsEqual(this.lastSetMarkersOptions_, markerOptions)) {
				this.lastSetMarkers_ = keywordHash;
				this.lastSetMarkersOptions_ = Object.assign({}, markerOptions);
				this.webviewRef_.current.wrappedInstance.send('setMarkers', keywords, markerOptions);
			}
		}

		const editorIsVisible = visiblePanes.indexOf('editor') >= 0;
		const toolbarItems = this.createToolbarItems(note, editorIsVisible);

		const toolbar = <Toolbar style={toolbarStyle} items={toolbarItems} />;

		const titleEditor = (
			<input
				type="text"
				ref={elem => {
					this.titleField_ = elem;
				}}
				style={titleEditorStyle}
				value={note && note.title ? note.title : ''}
				onChange={event => {
					this.title_changeText(event);
				}}
				onKeyDown={this.titleField_keyDown}
				placeholder={this.props.newNote ? _('Creating new %s...', isTodo ? _('to-do') : _('note')) : ''}
			/>
		);

		const tagList = !NOTE_TAG_BAR_FEATURE_ENABLED ? null : <TagList style={tagStyle} items={this.state.noteTags} />;

		const titleBarMenuButton = (
			<IconButton
				style={{
					display: 'flex',
				}}
				iconName="fa-caret-down"
				theme={this.props.theme}
				onClick={() => {
					this.itemContextMenu();
				}}
			/>
		);

		const titleBarDate = <span style={Object.assign({}, theme.textStyle, { color: theme.colorFaded })}>{time.formatMsToLocal(note.user_updated_time)}</span>;

		const viewer = <NoteTextViewer ref={this.webviewRef_} viewerStyle={viewerStyle} onDomReady={this.webview_domReady} onIpcMessage={this.webview_ipcMessage} />;

		const editorRootStyle = Object.assign({}, editorStyle);
		delete editorRootStyle.width;
		delete editorRootStyle.height;
		delete editorRootStyle.fontSize;
		const editor = (
			<AceEditor
				value={body}
				mode={markupLanguage === Note.MARKUP_LANGUAGE_HTML ? 'text' : 'markdown'}
				theme={editorRootStyle.editorTheme}
				style={editorRootStyle}
				width={`${editorStyle.width}px`}
				height={`${editorStyle.height}px`}
				fontSize={editorStyle.fontSize}
				showGutter={false}
				name="note-editor"
				wrapEnabled={true}
				onScroll={() => {
					this.editor_scroll();
				}}
				ref={elem => {
					this.editor_ref(elem);
				}}
				onChange={body => {
					this.aceEditor_change(body);
				}}
				showPrintMargin={false}
				onSelectionChange={this.aceEditor_selectionChange}
				onFocus={this.aceEditor_focus}
				readOnly={visiblePanes.indexOf('editor') < 0}
				// Disable warning: "Automatically scrolling cursor into view after
				// selection change this will be disabled in the next version set
				// editor.$blockScrolling = Infinity to disable this message"
				editorProps={{ $blockScrolling: Infinity }}
				// This is buggy (gets outside the container)
				highlightActiveLine={false}
			/>
		);

		const noteSearchBarComp = !this.state.showLocalSearch ? null : <NoteSearchBar ref={this.noteSearchBar_} style={{ display: 'flex', height: searchBarHeight, width: innerWidth, borderTop: `1px solid ${theme.dividerColor}` }} onChange={this.noteSearchBar_change} onNext={this.noteSearchBar_next} onPrevious={this.noteSearchBar_previous} onClose={this.noteSearchBar_close} />;

		return (
			<div style={rootStyle} onDrop={this.onDrop_}>
				<div style={titleBarStyle}>
					{titleEditor}
					{titleBarDate}
					{false ? titleBarMenuButton : null}
				</div>
				{toolbar}
				{tagList}
				{editor}
				{viewer}
				<div style={{ clear: 'both' }} />
				{noteSearchBarComp}
			</div>
		);
	}
}

const mapStateToProps = state => {
	return {
		noteId: state.selectedNoteIds.length === 1 ? state.selectedNoteIds[0] : null,
		notes: state.notes,
		selectedNoteIds: state.selectedNoteIds,
		selectedNoteHash: state.selectedNoteHash,
		noteTags: state.selectedNoteTags,
		folderId: state.selectedFolderId,
		itemType: state.selectedItemType,
		folders: state.folders,
		theme: state.settings.theme,
		syncStarted: state.syncStarted,
		newNote: state.newNote,
		windowCommand: state.windowCommand,
		notesParentType: state.notesParentType,
		searches: state.searches,
		selectedSearchId: state.selectedSearchId,
		watchedNoteFiles: state.watchedNoteFiles,
		customCss: state.customCss,
		lastEditorScrollPercents: state.lastEditorScrollPercents,
		historyNotes: state.historyNotes,
		templates: state.templates,
	};
};

const NoteText = connect(mapStateToProps)(NoteTextComponent);

module.exports = { NoteText };