Fixed button size

- The size of Sort Order buttons is adjusted to fit to v2.5.
- Refactor PerFolderSortOrderService.ts
- Option of Sort Order buttons is move to Appearance section.
- Option of Per-notebook Sort Order is move to Notebook section.
- Some descriptions about sort order settings are added.

.eslintignore

@@ -333,6 +333,15 @@ packages/app-desktop/gui/MainScreen/commands/toggleLayoutMoveMode.js.map
 packages/app-desktop/gui/MainScreen/commands/toggleNoteList.d.ts
 packages/app-desktop/gui/MainScreen/commands/toggleNoteList.js
 packages/app-desktop/gui/MainScreen/commands/toggleNoteList.js.map
+packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderField.d.ts
+packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderField.js
+packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderField.js.map
+packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderReverse.d.ts
+packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderReverse.js
+packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderReverse.js.map
+packages/app-desktop/gui/MainScreen/commands/togglePerFolderSortOrder.d.ts
+packages/app-desktop/gui/MainScreen/commands/togglePerFolderSortOrder.js
+packages/app-desktop/gui/MainScreen/commands/togglePerFolderSortOrder.js.map
 packages/app-desktop/gui/MainScreen/commands/toggleSideBar.d.ts
 packages/app-desktop/gui/MainScreen/commands/toggleSideBar.js
 packages/app-desktop/gui/MainScreen/commands/toggleSideBar.js.map
@@ -735,6 +744,12 @@ packages/app-desktop/services/plugins/hooks/useWebviewToPluginMessages.js.map
 packages/app-desktop/services/share/invitationRespond.d.ts
 packages/app-desktop/services/share/invitationRespond.js
 packages/app-desktop/services/share/invitationRespond.js.map
+packages/app-desktop/services/sortOrder/PerFolderSortOrderService.d.ts
+packages/app-desktop/services/sortOrder/PerFolderSortOrderService.js
+packages/app-desktop/services/sortOrder/PerFolderSortOrderService.js.map
+packages/app-desktop/services/sortOrder/notesSortOrderUtils.d.ts
+packages/app-desktop/services/sortOrder/notesSortOrderUtils.js
+packages/app-desktop/services/sortOrder/notesSortOrderUtils.js.map
 packages/app-desktop/services/spellChecker/SpellCheckerServiceDriverNative.d.ts
 packages/app-desktop/services/spellChecker/SpellCheckerServiceDriverNative.js
 packages/app-desktop/services/spellChecker/SpellCheckerServiceDriverNative.js.map

.gitignore

@@ -316,6 +316,15 @@ packages/app-desktop/gui/MainScreen/commands/toggleLayoutMoveMode.js.map
 packages/app-desktop/gui/MainScreen/commands/toggleNoteList.d.ts
 packages/app-desktop/gui/MainScreen/commands/toggleNoteList.js
 packages/app-desktop/gui/MainScreen/commands/toggleNoteList.js.map
+packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderField.d.ts
+packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderField.js
+packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderField.js.map
+packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderReverse.d.ts
+packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderReverse.js
+packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderReverse.js.map
+packages/app-desktop/gui/MainScreen/commands/togglePerFolderSortOrder.d.ts
+packages/app-desktop/gui/MainScreen/commands/togglePerFolderSortOrder.js
+packages/app-desktop/gui/MainScreen/commands/togglePerFolderSortOrder.js.map
 packages/app-desktop/gui/MainScreen/commands/toggleSideBar.d.ts
 packages/app-desktop/gui/MainScreen/commands/toggleSideBar.js
 packages/app-desktop/gui/MainScreen/commands/toggleSideBar.js.map
@@ -718,6 +727,12 @@ packages/app-desktop/services/plugins/hooks/useWebviewToPluginMessages.js.map
 packages/app-desktop/services/share/invitationRespond.d.ts
 packages/app-desktop/services/share/invitationRespond.js
 packages/app-desktop/services/share/invitationRespond.js.map
+packages/app-desktop/services/sortOrder/PerFolderSortOrderService.d.ts
+packages/app-desktop/services/sortOrder/PerFolderSortOrderService.js
+packages/app-desktop/services/sortOrder/PerFolderSortOrderService.js.map
+packages/app-desktop/services/sortOrder/notesSortOrderUtils.d.ts
+packages/app-desktop/services/sortOrder/notesSortOrderUtils.js
+packages/app-desktop/services/sortOrder/notesSortOrderUtils.js.map
 packages/app-desktop/services/spellChecker/SpellCheckerServiceDriverNative.d.ts
 packages/app-desktop/services/spellChecker/SpellCheckerServiceDriverNative.js
 packages/app-desktop/services/spellChecker/SpellCheckerServiceDriverNative.js.map

packages/app-desktop/app.ts

@@ -58,6 +58,7 @@ const commands = mainScreenCommands
 const globalCommands = appCommands.concat(libCommands);
 
 import editorCommandDeclarations from './gui/NoteEditor/editorCommandDeclarations';
+import PerFolderSortOrderService from './services/sortOrder/PerFolderSortOrderService';
 import ShareService from '@joplin/lib/services/share/ShareService';
 import checkForUpdates from './checkForUpdates';
 import { AppState } from './app.reducer';
@@ -388,6 +389,8 @@ class Application extends BaseApplication {
 
 		this.initRedux();
 
+		PerFolderSortOrderService.initialize();
+
 		CommandService.instance().initialize(this.store(), Setting.value('env') == 'dev', stateToWhenClauseContext);
 
 		for (const command of commands) {

packages/app-desktop/gui/Button/Button.tsx

@@ -33,9 +33,9 @@ const StyledTitle = styled.span`
 
 `;
 
-// const buttonHeight = 32;
+// const buttonSizePx = 32;
 
-const buttonHeight = (props: Props) => {
+export const buttonSizePx = (props: Props) => {
 	if (!props.size || props.size === ButtonSize.Normal) return 32;
 	if (props.size === ButtonSize.Small) return 26;
 	throw new Error(`Unknown size: ${props.size}`);
@@ -45,13 +45,13 @@ const StyledButtonBase = styled.button`
 	display: flex;
 	align-items: center;
 	flex-direction: row;
-	height: ${(props: Props) => buttonHeight(props)}px;
-	min-height: ${(props: Props) => buttonHeight(props)}px;
-	max-height: ${(props: Props) => buttonHeight(props)}px;
-	width: ${(props: any) => props.iconOnly ? `${buttonHeight}px` : 'auto'};
-	${(props: any) => props.iconOnly ? `min-width: ${buttonHeight}px;` : ''}
+	height: ${(props: Props) => buttonSizePx(props)}px;
+	min-height: ${(props: Props) => buttonSizePx(props)}px;
+	max-height: ${(props: Props) => buttonSizePx(props)}px;
+	width: ${(props: any) => props.iconOnly ? `${buttonSizePx}px` : 'auto'};
+	${(props: any) => props.iconOnly ? `min-width: ${buttonSizePx}px;` : ''}
 	${(props: any) => !props.iconOnly ? 'min-width: 100px;' : ''}
-	${(props: any) => props.iconOnly ? `max-width: ${buttonHeight}px;` : ''}
+	${(props: any) => props.iconOnly ? `max-width: ${buttonSizePx}px;` : ''}
 	box-sizing: border-box;
 	border-radius: 3px;
 	border-style: solid;

packages/app-desktop/gui/MainScreen/commands/index.ts

@@ -28,6 +28,9 @@ import * as showSpellCheckerMenu from './showSpellCheckerMenu';
 import * as toggleEditors from './toggleEditors';
 import * as toggleLayoutMoveMode from './toggleLayoutMoveMode';
 import * as toggleNoteList from './toggleNoteList';
+import * as toggleNotesSortOrderField from './toggleNotesSortOrderField';
+import * as toggleNotesSortOrderReverse from './toggleNotesSortOrderReverse';
+import * as togglePerFolderSortOrder from './togglePerFolderSortOrder';
 import * as toggleSideBar from './toggleSideBar';
 import * as toggleVisiblePanes from './toggleVisiblePanes';
 
@@ -61,6 +64,9 @@ const index:any[] = [
 	toggleEditors,
 	toggleLayoutMoveMode,
 	toggleNoteList,
+	toggleNotesSortOrderField,
+	toggleNotesSortOrderReverse,
+	togglePerFolderSortOrder,
 	toggleSideBar,
 	toggleVisiblePanes,
 ];

packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderField.ts

@@ -0,0 +1,26 @@
+import { CommandContext, CommandDeclaration, CommandRuntime } from '@joplin/lib/services/CommandService';
+import { setNotesSortOrder } from '../../../services/sortOrder/notesSortOrderUtils';
+import { _ } from '@joplin/lib/locale';
+
+export const declaration: CommandDeclaration = {
+	name: 'toggleNotesSortOrderField',
+	label: () => _('Toggle sort order field'),
+	parentLabel: () => _('Notes'),
+};
+
+export const runtime = (): CommandRuntime => {
+	return {
+		execute: async (_context: CommandContext, field?: string | Array<any>, reverse?: boolean) => {
+			// field: Sort order's field. undefined means switching a field.
+			// reverse: whether the sort order is reversed or not. undefined means toggling.
+			//
+			// To support CommandService.scheduleExecute(), field accepts an size-two Array,
+			// which means [field, reverse].
+			if (typeof field !== 'object') {
+				setNotesSortOrder(field, reverse);
+			} else {
+				setNotesSortOrder(field[0], field[1]);
+			}
+		},
+	};
+};

packages/app-desktop/gui/MainScreen/commands/toggleNotesSortOrderReverse.ts

@@ -0,0 +1,19 @@
+import { CommandContext, CommandDeclaration, CommandRuntime } from '@joplin/lib/services/CommandService';
+import Setting from '@joplin/lib/models/Setting';
+import { _ } from '@joplin/lib/locale';
+import { setNotesSortOrder } from '../../../services/sortOrder/notesSortOrderUtils';
+
+export const declaration: CommandDeclaration = {
+	name: 'toggleNotesSortOrderReverse',
+	label: () => _('Reverse sort order'),
+	parentLabel: () => _('Notes'),
+};
+
+export const runtime = (): CommandRuntime => {
+	return {
+		execute: async (_context: CommandContext) => {
+			const reverse = Setting.value('notes.sortOrder.reverse');
+			setNotesSortOrder(undefined, !reverse);
+		},
+	};
+};

packages/app-desktop/gui/MainScreen/commands/togglePerFolderSortOrder.ts

@@ -0,0 +1,18 @@
+import { CommandContext, CommandDeclaration, CommandRuntime } from '@joplin/lib/services/CommandService';
+import { _ } from '@joplin/lib/locale';
+import PerFolderSortOrderService from '../../../services/sortOrder/PerFolderSortOrderService';
+
+export const declaration: CommandDeclaration = {
+	name: 'togglePerFolderSortOrder',
+	label: () => _('Toggle per-notebook sort order'),
+};
+
+export const runtime = (): CommandRuntime => {
+	return {
+		enabledCondition: 'oneFolderSelected',
+
+		execute: async (_context: CommandContext, folderId?: string, own?: boolean) => {
+			PerFolderSortOrderService.set(folderId, own);
+		},
+	};
+};

packages/app-desktop/gui/MenuBar.tsx

@@ -136,7 +136,8 @@ function useMenuStates(menu: any, props: Props) {
 					menuItemSetChecked(`sort:${type}:${field}`, (props as any)[`${type}.sortOrder.field`] === field);
 				}
 
-				menuItemSetChecked(`sort:${type}:reverse`, (props as any)[`${type}.sortOrder.reverse`]);
+				const id = type == 'notes' ? 'toggleNotesSortOrderReverse' : `sort:${type}:reverse`;
+				menuItemSetChecked(id, (props as any)[`${type}.sortOrder.reverse`]);
 			}
 
 			applySortItemCheckState('notes');
@@ -267,22 +268,33 @@ function useMenu(props: Props) {
 						type: 'checkbox',
 						// checked: Setting.value(`${type}.sortOrder.field`) === field,
 						click: () => {
-							Setting.setValue(`${type}.sortOrder.field`, field);
+							if (type === 'notes') {
+								void CommandService.instance().execute('toggleNotesSortOrderField', field);
+							} else {
+								Setting.setValue(`${type}.sortOrder.field`, field);
+							}
 						},
 					});
 				}
 
 				sortItems.push({ type: 'separator' });
 
-				sortItems.push({
-					id: `sort:${type}:reverse`,
-					label: Setting.settingMetadata(`${type}.sortOrder.reverse`).label(),
-					type: 'checkbox',
-					// checked: Setting.value(`${type}.sortOrder.reverse`),
-					click: () => {
-						Setting.setValue(`${type}.sortOrder.reverse`, !Setting.value(`${type}.sortOrder.reverse`));
-					},
-				});
+				if (type == 'notes') {
+					sortItems.push(
+						{ ...menuItemDic.toggleNotesSortOrderReverse, type: 'checkbox' },
+						{ ...menuItemDic.toggleNotesSortOrderField, visible: false }
+					);
+				} else {
+					sortItems.push({
+						id: `sort:${type}:reverse`,
+						label: Setting.settingMetadata(`${type}.sortOrder.reverse`).label(),
+						type: 'checkbox',
+						// checked: Setting.value(`${type}.sortOrder.reverse`),
+						click: () => {
+							Setting.setValue(`${type}.sortOrder.reverse`, !Setting.value(`${type}.sortOrder.reverse`));
+						},
+					});
+				}
 
 				return sortItems;
 			};

packages/app-desktop/gui/NoteListControls/NoteListControls.tsx

@@ -1,13 +1,21 @@
+import { AppState } from '../../app.reducer';
 import * as React from 'react';
 import { useEffect, useRef } from 'react';
 import SearchBar from '../SearchBar/SearchBar';
-import Button, { ButtonLevel } from '../Button/Button';
+import Button, { ButtonLevel, ButtonSize, buttonSizePx } from '../Button/Button';
 import CommandService from '@joplin/lib/services/CommandService';
 import { runtime as focusSearchRuntime } from './commands/focusSearch';
+import Note from '@joplin/lib/models/Note';
+import { notesSortOrderNextField } from '../../services/sortOrder/notesSortOrderUtils';
+const { connect } = require('react-redux');
 const styled = require('styled-components').default;
 
 interface Props {
 	showNewNoteButtons: boolean;
+	sortOrderButtonsVisible: boolean;
+	sortOrderField: string;
+	sortOrderReverse: boolean;
+	notesParentType: string;
 	height: number;
 }
 
@@ -22,10 +30,21 @@ const StyledRoot = styled.div`
 
 const StyledButton = styled(Button)`
 	margin-left: 8px;
-	width: 26px;
-	height: 26px;
-	min-width: 26px;
-	min-height: 26px;
+`;
+
+const StyledPairButtonL = styled(Button)`
+	margin-left: 8px;
+	border-radius: 5px 0 0 5px;
+	min-width: ${(props: any) => buttonSizePx(props)}px;
+	max-width: ${(props: any) => buttonSizePx(props)}px;
+`;
+
+const StyledPairButtonR = styled(Button)`
+	min-width: 8px;
+	margin-left: 0px;
+	border-radius: 0 5px 5px 0;
+	border-width: 1px 1px 1px 0;
+	width: auto;
 `;
 
 const ButtonContainer = styled.div`
@@ -33,7 +52,7 @@ const ButtonContainer = styled.div`
 	flex-direction: row;
 `;
 
-export default function NoteListControls(props: Props) {
+function NoteListControls(props: Props) {
 	const searchBarRef = useRef(null);
 
 	useEffect(function() {
@@ -52,16 +71,74 @@ export default function NoteListControls(props: Props) {
 		void CommandService.instance().execute('newNote');
 	}
 
+	function onSortOrderFieldButtonClick() {
+		void CommandService.instance().execute('toggleNotesSortOrderField');
+	}
+
+	function onSortOrderReverseButtonClick() {
+		void CommandService.instance().execute('toggleNotesSortOrderReverse');
+	}
+
+	function sortOrderFieldTooltip() {
+		const term1 = CommandService.instance().label('toggleNotesSortOrderField');
+		const field = props.sortOrderField;
+		const term2 = Note.fieldToLabel(field);
+		const term3 = Note.fieldToLabel(notesSortOrderNextField(field));
+		return `${term1}:\n ${term2} -> ${term3}`;
+	}
+
+	function sortOrderFieldIcon() {
+		const field = props.sortOrderField;
+		const iconMap: any = {
+			user_updated_time: 'far fa-calendar-alt',
+			user_created_time: 'far fa-calendar-plus',
+			title: 'fas fa-font',
+			order: 'fas fa-wrench',
+		};
+		return `${iconMap[field] || iconMap['title']} ${field}`;
+	}
+
+	function sortOrderReverseIcon() {
+		return props.sortOrderReverse ? 'fas fa-long-arrow-alt-up' : 'fas fa-long-arrow-alt-down';
+	}
+
+	function showsSortOrderButtons() {
+		let visible = props.sortOrderButtonsVisible;
+		if (props.notesParentType === 'Search') visible = false;
+		return visible;
+	}
+
 	function renderNewNoteButtons() {
 		if (!props.showNewNoteButtons) return null;
 
 		return (
 			<ButtonContainer>
+				{showsSortOrderButtons() &&
+					<StyledPairButtonL
+						className="sort-order-field-button"
+						tooltip={sortOrderFieldTooltip()}
+						iconName={sortOrderFieldIcon()}
+						level={ButtonLevel.Secondary}
+						size={ButtonSize.Small}
+						onClick={onSortOrderFieldButtonClick}
+					/>
+				}
+				{showsSortOrderButtons() &&
+					<StyledPairButtonR
+						className="sort-order-reverse-button"
+						tooltip={CommandService.instance().label('toggleNotesSortOrderReverse')}
+						iconName={sortOrderReverseIcon()}
+						level={ButtonLevel.Secondary}
+						size={ButtonSize.Small}
+						onClick={onSortOrderReverseButtonClick}
+					/>
+				}
 				<StyledButton
 					className="new-todo-button"
 					tooltip={CommandService.instance().label('newTodo')}
 					iconName="far fa-check-square"
 					level={ButtonLevel.Primary}
+					size={ButtonSize.Small}
 					onClick={onNewTodoButtonClick}
 				/>
 				<StyledButton
@@ -69,6 +146,7 @@ export default function NoteListControls(props: Props) {
 					tooltip={CommandService.instance().label('newNote')}
 					iconName="icon-note"
 					level={ButtonLevel.Primary}
+					size={ButtonSize.Small}
 					onClick={onNewNoteButtonClick}
 				/>
 			</ButtonContainer>
@@ -82,3 +160,14 @@ export default function NoteListControls(props: Props) {
 		</StyledRoot>
 	);
 }
+
+const mapStateToProps = (state: AppState) => {
+	return {
+		sortOrderButtonsVisible: state.settings['notes.sortOrder.buttonsVisible'],
+		sortOrderField: state.settings['notes.sortOrder.field'],
+		sortOrderReverse: state.settings['notes.sortOrder.reverse'],
+		notesParentType: state.notesParentType,
+	};
+};
+
+export default connect(mapStateToProps)(NoteListControls);

packages/app-desktop/gui/Sidebar/Sidebar.tsx

@@ -21,6 +21,7 @@ import { FolderEntity } from '@joplin/lib/services/database/types';
 import stateToWhenClauseContext from '../../services/commands/stateToWhenClauseContext';
 import { store } from '@joplin/lib/reducer';
 import { getFolderCallbackUrl, getTagCallbackUrl } from '@joplin/lib/callbackUrlUtils';
+import PerFolderSortOrderService from '../../services/sortOrder/PerFolderSortOrderService';
 const { connect } = require('react-redux');
 const shared = require('@joplin/lib/components/shared/side-menu-shared.js');
 const { themeStyle } = require('@joplin/lib/theme');
@@ -332,6 +333,13 @@ class SidebarComponent extends React.Component<Props, State> {
 					submenu: exportMenu,
 				})
 			);
+			if (Setting.value('notes.perFolderSortOrderEnabled')) {
+				menu.append(new MenuItem({
+					...menuUtils.commandToStatefulMenuItem('togglePerFolderSortOrder', itemId),
+					type: 'checkbox',
+					checked: PerFolderSortOrderService.isSet(itemId),
+				}));
+			}
 		}
 
 		if (itemType === BaseModel.TYPE_FOLDER) {

packages/app-desktop/gui/menuCommandNames.ts

@@ -32,6 +32,9 @@ export default function() {
 		'toggleExternalEditing',
 		'toggleLayoutMoveMode',
 		'toggleNoteList',
+		'toggleNotesSortOrderField',
+		'toggleNotesSortOrderReverse',
+		'togglePerFolderSortOrder',
 		'toggleSideBar',
 		'toggleVisiblePanes',
 		'editor.deleteLine',

packages/app-desktop/services/sortOrder/PerFolderSortOrderService.ts

@@ -0,0 +1,198 @@
+import Setting from '@joplin/lib/models/Setting';
+import eventManager from '@joplin/lib/eventManager';
+import { notesSortOrderFieldArray, setNotesSortOrder } from './notesSortOrderUtils';
+
+const SUFFIX_FIELD = '$field';
+const SUFFIX_REVERSE = '$reverse';
+
+export interface SortOrder {
+	field: string;
+	reverse: boolean;
+}
+
+interface FolderState {
+	notesParentType: string;
+	selectedFolderId: string;
+}
+
+interface SortOrderPool {
+	[key: string]: string | boolean;
+}
+
+export default class PerFolderSortOrderService {
+
+	private static previousFolderId: string = null;
+	private static folderState: FolderState = { notesParentType: '', selectedFolderId: '' };
+	// Since perFolderSortOrders and sharedSortOrder is persisted using Setting,
+	// their structures are not nested.
+	private static perFolderSortOrders: SortOrderPool = null;
+	private static sharedSortOrder: SortOrder & SortOrderPool = {
+		field: 'user_updated_time',
+		reverse: true,
+		user_updated_time: true,
+		user_created_time: true,
+		title: false,
+		order: false,
+	};
+
+	public static initialize() {
+		this.loadPerFolderSortOrders();
+		this.loadSharedSortOrder();
+		eventManager.appStateOn('notesParentType', this.onFolderSelectionMayChange.bind(this, 'notesParentType'));
+		eventManager.appStateOn('selectedFolderId', this.onFolderSelectionMayChange.bind(this, 'selectedFolderId'));
+	}
+
+	public static isSet(folderId: string): boolean {
+		return folderId && this.perFolderSortOrders && this.perFolderSortOrders.hasOwnProperty(folderId + SUFFIX_FIELD);
+	}
+
+	public static get(folderId: string): SortOrder {
+		if (folderId && this.perFolderSortOrders) {
+			const field = this.perFolderSortOrders[folderId + SUFFIX_FIELD] as string;
+			const reverse = this.perFolderSortOrders[folderId + SUFFIX_REVERSE] as boolean;
+			if (field) return { field, reverse };
+		}
+		return undefined;
+	}
+
+	public static set(folderId?: string, own?: boolean) {
+		let targetId = folderId;
+		const selectedId = this.getSelectedFolderId();
+		if (!targetId) {
+			targetId = selectedId; // default: selected folder
+			if (!targetId) return;
+		}
+		const targetOwn = this.isSet(targetId);
+		let newOwn;
+		if (typeof own === 'undefined') {
+			newOwn = !targetOwn; // default: toggling
+		} else {
+			newOwn = !!own;
+			if (newOwn === targetOwn) return;
+		}
+		if (newOwn) {
+			let field: string, reverse: boolean;
+			if (!this.isSet(selectedId)) {
+				field = Setting.value('notes.sortOrder.field');
+				reverse = Setting.value('notes.sortOrder.reverse');
+			} else {
+				field = this.sharedSortOrder.field;
+				if (Setting.value('notes.perFieldReversalEnabled')) {
+					reverse = this.sharedSortOrder[field] as boolean;
+				} else {
+					reverse = this.sharedSortOrder.reverse;
+				}
+			}
+			PerFolderSortOrderService.setPerFolderSortOrder(targetId, field, reverse);
+		} else {
+			PerFolderSortOrderService.deletePerFolderSortOrder(targetId);
+		}
+	}
+
+
+	private static onFolderSelectionMayChange(cause: string, event: any) {
+		if (cause !== 'notesParentType' && cause !== 'selectedFolderId') return;
+		this.folderState[cause] = event.value;
+		const selectedId = this.getSelectedFolderId();
+		if (this.previousFolderId === selectedId) return;
+		const field: string = Setting.value('notes.sortOrder.field');
+		const reverse: boolean = Setting.value('notes.sortOrder.reverse');
+		let previousFolderHasPerFolderSortOrder = false;
+		if (this.previousFolderId !== null) {
+			previousFolderHasPerFolderSortOrder = this.isSet(this.previousFolderId);
+			if (previousFolderHasPerFolderSortOrder) {
+				this.setPerFolderSortOrder(this.previousFolderId, field, reverse);
+			} else {
+				this.setSharedSortOrder(field, reverse);
+			}
+		}
+		this.previousFolderId = selectedId;
+		let next: SortOrder;
+		if (this.isSet(selectedId)) {
+			next = this.get(selectedId);
+		} else if (previousFolderHasPerFolderSortOrder) {
+			next = this.sharedSortOrder;
+		} else {
+			return;
+		}
+		if (Setting.value('notes.perFolderSortOrderEnabled')) {
+			if (next.field !== field || next.reverse !== reverse) {
+				setNotesSortOrder(next.field, next.reverse);
+			}
+		}
+	}
+
+	private static getSelectedFolderId(): string {
+		if (this.folderState.notesParentType === 'Folder') {
+			return this.folderState.selectedFolderId;
+		} else {
+			return '';
+		}
+	}
+
+	private static loadPerFolderSortOrders() {
+		this.perFolderSortOrders = { ...Setting.value('notes.perFolderSortOrders') };
+	}
+
+	private static loadSharedSortOrder() {
+		const validFields = notesSortOrderFieldArray();
+		const value = Setting.value('notes.sharedSortOrder');
+		for (const key in this.sharedSortOrder) {
+			if (value.hasOwnProperty(key)) {
+				if (key !== 'field' || validFields.includes(value.field)) {
+					this.sharedSortOrder[key] = value[key];
+				}
+			}
+		}
+	}
+
+	private static setPerFolderSortOrder(folderId: string, field: string, reverse: boolean) {
+		const old = this.get(folderId);
+		let dirty = false;
+		if (!(old?.field === field)) {
+			this.perFolderSortOrders[folderId + SUFFIX_FIELD] = field;
+			dirty = true;
+		}
+		if (!(old?.reverse === reverse)) {
+			this.perFolderSortOrders[folderId + SUFFIX_REVERSE] = reverse;
+			dirty = true;
+		}
+		if (dirty) {
+			Setting.setValue('notes.perFolderSortOrders', { ...this.perFolderSortOrders });
+		}
+	}
+
+	private static deletePerFolderSortOrder(folderId: string) {
+		let dirty = false;
+		if (this.perFolderSortOrders.hasOwnProperty(folderId + SUFFIX_FIELD)) {
+			delete this.perFolderSortOrders[folderId + SUFFIX_FIELD];
+			dirty = true;
+		}
+		if (this.perFolderSortOrders.hasOwnProperty(folderId + SUFFIX_REVERSE)) {
+			delete this.perFolderSortOrders[folderId + SUFFIX_REVERSE];
+			dirty = true;
+		}
+		if (dirty) {
+			Setting.setValue('notes.perFolderSortOrders', { ...this.perFolderSortOrders });
+		}
+	}
+
+	private static setSharedSortOrder(field: string, reverse: boolean) {
+		let dirty = false;
+		if (this.sharedSortOrder.field !== field) {
+			this.sharedSortOrder.field = field;
+			dirty = true;
+		}
+		if (this.sharedSortOrder.reverse !== reverse) {
+			this.sharedSortOrder.reverse = reverse;
+			dirty = true;
+		}
+		if (this.sharedSortOrder[field] !== reverse) {
+			this.sharedSortOrder[field] = reverse;
+			dirty = true;
+		}
+		if (dirty) {
+			Setting.setValue('notes.sharedSortOrder', { ...this.sharedSortOrder });
+		}
+	}
+}

packages/app-desktop/services/sortOrder/notesSortOrderUtils.ts

@@ -0,0 +1,66 @@
+import Setting from '@joplin/lib/models/Setting';
+
+let fields: string[] = null;
+let perFieldReverse: { [field: string]: boolean } = null;
+
+export const notesSortOrderFieldArray = (): string[] => {
+	// The order of the fields is strictly determinate.
+	if (fields == null) {
+		fields = Setting.enumOptionValues('notes.sortOrder.field').sort().reverse();
+	}
+	return fields;
+};
+
+export const notesSortOrderNextField = (currentField: string) => {
+	const fields = notesSortOrderFieldArray();
+	const index = fields.indexOf(currentField);
+	if (index < 0) {
+		return currentField;
+	} else {
+		return fields[(index + 1) % fields.length];
+	}
+};
+
+export const setNotesSortOrder = (field?: string, reverse?: boolean) => {
+	// field: Sort order's field. undefined means changing a field cyclicly.
+	// reverse: whether the sort order is reversed or not. undefined means toggling.
+	let nextField = field;
+	let nextReverse = reverse;
+	const currentField = Setting.value('notes.sortOrder.field');
+	const currentReverse = Setting.value('notes.sortOrder.reverse');
+	const enabled = Setting.value('notes.perFieldReversalEnabled');
+	if (enabled) {
+		if (perFieldReverse === null) {
+			perFieldReverse = { ...Setting.value('notes.perFieldReverse') };
+		}
+	}
+	if (typeof field === 'undefined') {
+		if (typeof reverse === 'undefined') {
+			// If both arguments are undefined, the next field is selected.
+			nextField = notesSortOrderNextField(currentField);
+		} else {
+			nextField = currentField;
+		}
+	}
+	if (typeof reverse === 'undefined') {
+		if (enabled && perFieldReverse.hasOwnProperty(nextField)) {
+			nextReverse = !!perFieldReverse[nextField];
+		} else {
+			nextReverse = currentReverse;
+		}
+	}
+	if (currentField !== nextField) {
+		Setting.setValue('notes.sortOrder.field', nextField);
+	}
+	if (currentReverse !== nextReverse) {
+		Setting.setValue('notes.sortOrder.reverse', nextReverse);
+	}
+	if (enabled) {
+		// nextField is sane here.
+		nextReverse = !!nextReverse;
+		if (perFieldReverse[nextField] !== nextReverse) {
+			perFieldReverse[nextField] = nextReverse;
+			Setting.setValue('notes.perFieldReverse', { ...perFieldReverse });
+		}
+	}
+};

packages/lib/BaseApplication.ts

@@ -488,7 +488,6 @@ export default class BaseApplication {
 		// appLogger.debug('Reducer action', this.reducerActionToString(action));
 
 		const result = next(action);
-		const newState = store.getState();
 		let refreshNotes = false;
 		let refreshFolders: boolean | string = false;
 		// let refreshTags = false;
@@ -496,6 +495,7 @@ export default class BaseApplication {
 		let refreshNotesHash = '';
 
 		await reduxSharedMiddleware(store, next, action);
+		const newState = store.getState();
 
 		if (this.hasGui() && ['NOTE_UPDATE_ONE', 'NOTE_DELETE', 'FOLDER_UPDATE_ONE', 'FOLDER_DELETE'].indexOf(action.type) >= 0) {
 			if (!(await reg.syncTarget().syncStarted())) void reg.scheduleSync(30 * 1000, { syncSteps: ['update_remote', 'delete_remote'] });

packages/lib/models/Setting.ts

@@ -825,6 +825,67 @@ class Setting extends BaseModel {
 				storage: SettingStorage.File,
 			},
 			'notes.sortOrder.reverse': { value: true, type: SettingItemType.Bool, storage: SettingStorage.File, section: 'note', public: true, label: () => _('Reverse sort order'), appTypes: [AppType.Cli] },
+			// NOTE: A setting whose name starts with 'notes.sortOrder' is special,
+			// which implies changing the setting automatically triggers the reflesh of notes.
+			// See lib/BaseApplication.ts/generalMiddleware() for details.
+			'notes.sortOrder.buttonsVisible': {
+				value: true,
+				type: SettingItemType.Bool,
+				storage: SettingStorage.File,
+				section: 'appearance',
+				public: true,
+				label: () => _('Show sort order buttons'),
+				description: () => _('If true, sort order buttons (field + reverse) for notes are shown at the top of Note List.'),
+				appTypes: [AppType.Desktop],
+			},
+			'notes.perFieldReversalEnabled': {
+				value: true,
+				type: SettingItemType.Bool,
+				storage: SettingStorage.File,
+				section: 'note',
+				public: false,
+				label: () => _('Enable per-field sort order reversal'),
+				description: () => _('If true, normal or reverse is kept for each sort order field for notes.'),
+				appTypes: [AppType.Cli, AppType.Desktop],
+			},
+			'notes.perFieldReverse': {
+				value: {
+					user_updated_time: true,
+					user_created_time: true,
+					title: false,
+					order: false,
+				},
+				type: SettingItemType.Object,
+				storage: SettingStorage.File,
+				section: 'note',
+				public: false,
+				appTypes: [AppType.Cli, AppType.Desktop],
+			},
+			'notes.perFolderSortOrderEnabled': {
+				value: true,
+				type: SettingItemType.Bool,
+				storage: SettingStorage.File,
+				section: 'notebook',
+				public: true,
+				label: () => _('Enable per-notebook sort order'),
+				description: () => _('If true, some notebooks can have their own sort orders (field + reverse) for their notes inside. Any number of notebooks can be specified to have their own sort orders via context menu in the sidebar.'),
+				appTypes: [AppType.Cli, AppType.Desktop],
+			},
+			'notes.perFolderSortOrders': {
+				value: {},
+				type: SettingItemType.Object,
+				storage: SettingStorage.File,
+				section: 'notebook',
+				public: false,
+				appTypes: [AppType.Cli, AppType.Desktop],
+			},
+			'notes.sharedSortOrder': {
+				value: {},
+				type: SettingItemType.Object,
+				section: 'notebook',
+				public: false,
+				appTypes: [AppType.Cli, AppType.Desktop],
+			},
 			'folders.sortOrder.field': {
 				value: 'title',
 				type: SettingItemType.String,
@@ -2044,6 +2105,7 @@ class Setting extends BaseModel {
 		if (name === 'sync') return _('Synchronisation');
 		if (name === 'appearance') return _('Appearance');
 		if (name === 'note') return _('Note');
+		if (name === 'notebook') return _('Notebook');
 		if (name === 'markdownPlugins') return _('Markdown');
 		if (name === 'plugins') return _('Plugins');
 		if (name === 'application') return _('Application');
@@ -2071,6 +2133,7 @@ class Setting extends BaseModel {
 		if (name === 'sync') return 'icon-sync';
 		if (name === 'appearance') return 'icon-appearance';
 		if (name === 'note') return 'icon-note';
+		if (name === 'notebook') return 'icon-notebooks';
 		if (name === 'plugins') return 'icon-plugins';
 		if (name === 'markdownPlugins') return 'fab fa-markdown';
 		if (name === 'application') return 'icon-application';