UI Components

/**
 * A widget that displays titles as a single row or column of tabs.
 * Provides tab selection, reordering, closing, and other interactive features.
 */
class TabBar<T> extends Widget {
  /**
   * Construct a new tab bar.
   * @param options - The options for initializing the tab bar
   */
  constructor(options?: TabBar.IOptions<T>);

  /** The renderer for the tab bar (read-only) */
  readonly renderer: TabBar.IRenderer<T>;

  /** The document context for the tab bar (read-only) */
  readonly document: Document | ShadowRoot;

  /** Whether the tabs are movable by the user */
  tabsMovable: boolean;

  /** Whether the title text can be edited by the user */
  titlesEditable: boolean;

  /** Whether a tab can be deselected by clicking it */
  allowDeselect: boolean;

  /** The insertion behavior when adding new tabs */
  insertBehavior: TabBar.InsertBehavior;

  /** The removal behavior when removing tabs */
  removeBehavior: TabBar.RemoveBehavior;

  /** The currently selected title, or null if no title is selected */
  currentTitle: Title<T> | null;

  /** The index of the currently selected tab, or -1 if no tab is selected */
  currentIndex: number;

  /** The name of the tab bar */
  name: string;

  /** The orientation of the tab bar */
  orientation: TabBar.Orientation;

  /** Whether the add button is enabled */
  addButtonEnabled: boolean;

  /** The titles managed by the tab bar (read-only) */
  readonly titles: ReadonlyArray<Title<T>>;

  /** The content node for the tab bar (read-only) */
  readonly contentNode: HTMLUListElement;

  /** The add button node for the tab bar (read-only) */
  readonly addButtonNode: HTMLDivElement;

  /** A signal emitted when the current tab changes */
  readonly currentChanged: ISignal<this, TabBar.ICurrentChangedArgs<T>>;

  /** A signal emitted when a tab is moved */
  readonly tabMoved: ISignal<this, TabBar.ITabMovedArgs<T>>;

  /** A signal emitted when a tab should be activated */
  readonly tabActivateRequested: ISignal<this, TabBar.ITabActivateRequestedArgs<T>>;

  /** A signal emitted when the add button is clicked */
  readonly addRequested: ISignal<this, void>;

  /** A signal emitted when a tab close is requested */
  readonly tabCloseRequested: ISignal<this, TabBar.ITabCloseRequestedArgs<T>>;

  /** A signal emitted when a tab detach is requested */
  readonly tabDetachRequested: ISignal<this, TabBar.ITabDetachRequestedArgs<T>>;

  /** Dispose of the tab bar and its resources */
  dispose(): void;

  /**
   * Add a tab to the end of the tab bar.
   * @param value - The title or options for creating the tab
   * @returns The title object for the added tab
   */
  addTab(value: Title<T> | Title.IOptions<T>): Title<T>;

  /**
   * Insert a tab at the specified index.
   * @param index - The index at which to insert the tab
   * @param value - The title or options for creating the tab
   * @returns The title object for the inserted tab
   */
  insertTab(index: number, value: Title<T> | Title.IOptions<T>): Title<T>;

  /**
   * Remove a tab from the tab bar.
   * @param title - The title to remove
   */
  removeTab(title: Title<T>): void;

  /**
   * Remove the tab at the specified index.
   * @param index - The index of the tab to remove
   */
  removeTabAt(index: number): void;

  /** Remove all tabs from the tab bar */
  clearTabs(): void;

  /** Release the mouse grab for the tab bar */
  releaseMouse(): void;

  /** Handle DOM events for the tab bar */
  handleEvent(event: Event): void;
}

namespace TabBar {
  /**
   * Options for initializing a tab bar.
   */
  interface IOptions<T> {
    /** The document context for the tab bar */
    document?: Document | ShadowRoot;
    
    /** Whether tabs are movable (default: false) */
    tabsMovable?: boolean;
    
    /** Whether titles are editable (default: false) */
    titlesEditable?: boolean;
    
    /** Whether tabs can be deselected (default: false) */
    allowDeselect?: boolean;
    
    /** The insertion behavior (default: 'select-tab-if-needed') */
    insertBehavior?: InsertBehavior;
    
    /** The removal behavior (default: 'select-tab-after') */
    removeBehavior?: RemoveBehavior;
    
    /** The name for the tab bar (default: '') */
    name?: string;
    
    /** The orientation (default: 'horizontal') */
    orientation?: Orientation;
    
    /** Whether add button is enabled (default: false) */
    addButtonEnabled?: boolean;
    
    /** The renderer for creating tab elements */
    renderer?: IRenderer<T>;
  }

  /**
   * The available orientations for a tab bar.
   */
  type Orientation = 'horizontal' | 'vertical';

  /**
   * The available insertion behaviors for a tab bar.
   */
  type InsertBehavior = 'select-tab' | 'select-tab-if-needed' | 'none';

  /**
   * The available removal behaviors for a tab bar.
   */
  type RemoveBehavior = 'select-tab-after' | 'select-tab-before' | 'select-previous-tab' | 'none';

  /**
   * An object which renders the visual parts of a tab bar.
   */
  interface IRenderer<T> {
    /** The CSS selector for close icons in tab elements */
    readonly closeIconSelector: string;

    /**
     * Render the virtual element for a tab.
     * @param data - The render data for the tab
     * @returns The virtual element for the tab
     */
    renderTab(data: IRenderData<T>): VirtualElement;
  }

  /**
   * The render data for a tab bar tab.
   */
  interface IRenderData<T> {
    /** The title for the tab */
    title: Title<T>;
    
    /** Whether the tab is current */
    current: boolean;
    
    /** The z-index for the tab */
    zIndex: number;
  }

  /**
   * Default tab bar renderer implementation.
   */
  class Renderer implements IRenderer<any> {
    /** The CSS selector for close icons */
    readonly closeIconSelector: string;

    /**
     * Render the virtual element for a tab.
     * @param data - The render data for the tab
     * @returns The virtual element for the tab
     */
    renderTab(data: IRenderData<any>): VirtualElement;
  }

  /** Signal argument interfaces */
  interface ICurrentChangedArgs<T> {
    previousIndex: number;
    previousTitle: Title<T> | null;
    currentIndex: number;
    currentTitle: Title<T> | null;
  }

  interface ITabMovedArgs<T> {
    fromIndex: number;
    toIndex: number;
    title: Title<T>;
  }

  interface ITabActivateRequestedArgs<T> {
    index: number;
    title: Title<T>;
  }

  interface ITabCloseRequestedArgs<T> {
    index: number;
    title: Title<T>;
  }

  interface ITabDetachRequestedArgs<T> {
    index: number;
    title: Title<T>;
    clientX: number;
    clientY: number;
    offset: { x: number; y: number };
  }
}

import { Widget, TabBar, Title } from "@lumino/widgets";

// Create tab bar
const tabBar = new TabBar<Widget>({
  orientation: 'horizontal',
  tabsMovable: true,
  insertBehavior: 'select-tab'
});

// Add tabs
const widget1 = new Widget();
const title1 = tabBar.addTab({
  owner: widget1,
  label: 'Document 1',
  iconClass: 'fa fa-file',
  closable: true
});

const widget2 = new Widget();
const title2 = tabBar.addTab({
  owner: widget2,
  label: 'Document 2',
  closable: true
});

// Handle tab selection
tabBar.currentChanged.connect((sender, args) => {
  console.log(`Selected tab: ${args.currentTitle?.label}`);
});

// Handle tab close requests
tabBar.tabCloseRequested.connect((sender, args) => {
  tabBar.removeTab(args.title);
});

// Handle tab moves
tabBar.tabMoved.connect((sender, args) => {
  console.log(`Moved tab from ${args.fromIndex} to ${args.toIndex}`);
});

/**
 * A widget that displays a menu bar for application menus.
 * Manages a collection of menus with keyboard and mouse navigation.
 */
class MenuBar extends Widget {
  /**
   * Construct a new menu bar.
   * @param options - The options for initializing the menu bar
   */
  constructor(options?: MenuBar.IOptions);

  /** The renderer for the menu bar (read-only) */
  readonly renderer: MenuBar.IRenderer;

  /** The currently active menu, or null if no menu is active */
  readonly activeMenu: Menu | null;

  /** The index of the active menu, or -1 if no menu is active */
  activeIndex: number;

  /** The menus in the menu bar (read-only) */
  readonly menus: ReadonlyArray<Menu>;

  /** The child menu for the menu bar (read-only) */
  readonly childMenu: Menu | null;

  /** The content node for the menu bar (read-only) */
  readonly contentNode: HTMLUListElement;

  /** The overflow index for the menu bar (read-only) */
  readonly overflowIndex: number;

  /** The overflow menu for the menu bar (read-only) */
  readonly overflowMenu: Menu | null;

  /** Dispose of the menu bar and its resources */
  dispose(): void;

  /**
   * Add a menu to the end of the menu bar.
   * @param menu - The menu to add
   * @param update - Whether to update the menu bar immediately
   */
  addMenu(menu: Menu, update?: boolean): void;

  /**
   * Insert a menu at the specified index.
   * @param index - The index at which to insert the menu
   * @param menu - The menu to insert
   * @param update - Whether to update the menu bar immediately
   */
  insertMenu(index: number, menu: Menu, update?: boolean): void;

  /**
   * Remove a menu from the menu bar.
   * @param menu - The menu to remove
   * @param update - Whether to update the menu bar immediately
   */
  removeMenu(menu: Menu, update?: boolean): void;

  /**
   * Remove the menu at the specified index.
   * @param index - The index of the menu to remove
   * @param update - Whether to update the menu bar immediately
   */
  removeMenuAt(index: number, update?: boolean): void;

  /**
   * Remove all menus from the menu bar.
   * @param update - Whether to update the menu bar immediately
   */
  clearMenus(update?: boolean): void;

  /** Open the active menu */
  openActiveMenu(): void;

  /** Handle DOM events for the menu bar */
  handleEvent(event: Event): void;

  /** Activate the next menu in the menu bar */
  activateNextMenu(): void;

  /** Activate the previous menu in the menu bar */
  activatePreviousMenu(): void;
}

namespace MenuBar {
  /**
   * Options for initializing a menu bar.
   */
  interface IOptions extends Widget.IOptions {
    /** The renderer for creating menu bar elements */
    renderer?: IRenderer;
    
    /** Options for forcing item positions */
    forceItemsPosition?: Partial<IForceItemsPositionOptions>;
  }

  /**
   * An object which renders the visual parts of a menu bar.
   */
  interface IRenderer {
    /**
     * Create an item node for a menu bar item.
     * @param data - The render data for the item
     * @returns The item node for the menu
     */
    createItemNode(data: IRenderData): HTMLLIElement;

    /**
     * Update an existing item node to reflect current state.
     * @param node - The item node to update
     * @param data - The render data for the item
     */
    updateItemNode(node: HTMLLIElement, data: IRenderData): void;

    /**
     * Create an icon node for a menu bar item.
     * @param data - The render data for the item
     * @returns The icon node for the menu
     */
    createIconNode(data: IRenderData): HTMLSpanElement;

    /**
     * Update an existing icon node to reflect current state.
     * @param node - The icon node to update
     * @param data - The render data for the item
     */
    updateIconNode(node: HTMLSpanElement, data: IRenderData): void;

    /**
     * Create a label node for a menu bar item.
     * @param data - The render data for the item
     * @returns The label node for the menu
     */
    createLabelNode(data: IRenderData): HTMLSpanElement;

    /**
     * Update an existing label node to reflect current state.
     * @param node - The label node to update
     * @param data - The render data for the item
     */
    updateLabelNode(node: HTMLSpanElement, data: IRenderData): void;
  }

  /**
   * The render data for a menu bar item.
   */
  interface IRenderData {
    /** The title for the menu */
    title: Title<Menu>;
    
    /** Whether the menu is active */
    active: boolean;
  }

  /**
   * Options for forcing menu item positions.
   */
  interface IForceItemsPositionOptions {
    /** Force items to the start position */
    forceX: boolean;
    
    /** Force items to the top position */
    forceY: boolean;
  }

  /**
   * Default menu bar renderer implementation.
   */
  class Renderer implements IRenderer {
    createItemNode(data: IRenderData): HTMLLIElement;
    updateItemNode(node: HTMLLIElement, data: IRenderData): void;
    createIconNode(data: IRenderData): HTMLSpanElement;
    updateIconNode(node: HTMLSpanElement, data: IRenderData): void;
    createLabelNode(data: IRenderData): HTMLSpanElement;
    updateLabelNode(node: HTMLSpanElement, data: IRenderData): void;
  }
}

import { MenuBar, Menu } from "@lumino/widgets";
import { CommandRegistry } from "@lumino/commands";

// Create command registry
const commands = new CommandRegistry();

// Create menus
const fileMenu = new Menu({ commands });
fileMenu.title.label = 'File';
fileMenu.title.mnemonic = 0; // 'F' is underlined

const editMenu = new Menu({ commands });
editMenu.title.label = 'Edit';
editMenu.title.mnemonic = 0; // 'E' is underlined

// Create menu bar
const menuBar = new MenuBar();
menuBar.addMenu(fileMenu);
menuBar.addMenu(editMenu);

// Add menu items
fileMenu.addItem({ command: 'file:new' });
fileMenu.addItem({ command: 'file:open' });
fileMenu.addItem({ type: 'separator' });
fileMenu.addItem({ command: 'file:save' });

editMenu.addItem({ command: 'edit:cut' });
editMenu.addItem({ command: 'edit:copy' });
editMenu.addItem({ command: 'edit:paste' });

/**
 * A widget that displays a palette of commands for quick access.
 * Provides fuzzy search and keyboard navigation of available commands.
 */
class CommandPalette extends Widget {
  /**
   * Construct a new command palette.
   * @param options - The options for initializing the command palette
   */
  constructor(options: CommandPalette.IOptions);

  /** The command registry for the palette (read-only) */
  readonly commands: CommandRegistry;

  /** The renderer for the palette (read-only) */
  readonly renderer: CommandPalette.IRenderer;

  /** The search input node for the palette (read-only) */
  readonly searchNode: HTMLInputElement;

  /** The input node for the palette (read-only) */
  readonly inputNode: HTMLInputElement;

  /** The content node for the palette (read-only) */
  readonly contentNode: HTMLUListElement;

  /**
   * Add an item to the command palette.
   * @param options - The options for creating the item
   * @returns The command palette item that was added
   */
  addItem(options: CommandPalette.IItemOptions): CommandPalette.IItem;

  /**
   * Add multiple items to the command palette.
   * @param options - An array of options for creating items
   * @returns An array of command palette items that were added
   */
  addItems(options: CommandPalette.IItemOptions[]): CommandPalette.IItem[];

  /**
   * Remove an item from the command palette.
   * @param item - The item to remove
   */
  removeItem(item: CommandPalette.IItem): void;

  /**
   * Remove the item at the specified index.
   * @param index - The index of the item to remove
   */
  removeItemAt(index: number): void;

  /** Remove all items from the command palette */
  clearItems(): void;

  /** Refresh the command palette display */
  refresh(): void;

  /** Handle DOM events for the command palette */
  handleEvent(event: Event): void;
}

namespace CommandPalette {
  /**
   * Options for initializing a command palette.
   */
  interface IOptions extends Widget.IOptions {
    /** The command registry to use for the palette */
    commands: CommandRegistry;
    
    /** The renderer for creating palette elements */
    renderer?: IRenderer;
  }

  /**
   * An object which represents an item in a command palette.
   */
  interface IItem {
    /** The command identifier for the item */
    command: string;
    
    /** The arguments for the command */
    args: any;
    
    /** The category for the item */
    category: string;
    
    /** The rank for the item (lower ranks appear first) */
    rank: number;
  }

  /**
   * Options for creating a command palette item.
   */
  interface IItemOptions {
    /** The command identifier for the item */
    command: string;
    
    /** The arguments for the command (optional) */
    args?: any;
    
    /** The category for the item (default: '') */
    category?: string;
    
    /** The rank for the item (default: Infinity) */
    rank?: number;
  }

  /**
   * An object which renders the visual parts of a command palette.
   */
  interface IRenderer {
    /**
     * Create an item node for a command palette item.
     * @param data - The render data for the item
     * @returns The item node for the command
     */
    createItemNode(data: IRenderData): HTMLLIElement;

    /**
     * Update an existing item node to reflect current state.
     * @param node - The item node to update
     * @param data - The render data for the item
     */
    updateItemNode(node: HTMLLIElement, data: IRenderData): void;

    /**
     * Create a category node for a command palette category.
     * @param data - The render data for the category
     * @returns The category node
     */
    createCategoryNode(data: IRenderData): HTMLLIElement;

    /**
     * Update an existing category node to reflect current state.
     * @param node - The category node to update
     * @param data - The render data for the category
     */
    updateCategoryNode(node: HTMLLIElement, data: IRenderData): void;
  }

  /**
   * The render data for a command palette item.
   */
  interface IRenderData {
    /** The item being rendered */
    item: IItem;
    
    /** Whether the item is active */
    active: boolean;
    
    /** The indices of matched characters in the label */
    indices: number[] | null;
  }

  /**
   * Default command palette renderer implementation.
   */
  class Renderer implements IRenderer {
    createItemNode(data: IRenderData): HTMLLIElement;
    updateItemNode(node: HTMLLIElement, data: IRenderData): void;
    createCategoryNode(data: IRenderData): HTMLLIElement;
    updateCategoryNode(node: HTMLLIElement, data: IRenderData): void;
  }
}

import { CommandPalette } from "@lumino/widgets";
import { CommandRegistry } from "@lumino/commands";

// Create command registry and add commands
const commands = new CommandRegistry();

commands.addCommand('file:new', {
  label: 'New File',
  iconClass: 'fa fa-file',
  execute: () => console.log('Creating new file')
});

commands.addCommand('edit:find', {
  label: 'Find in File',
  iconClass: 'fa fa-search',
  execute: () => console.log('Opening find dialog')
});

// Create command palette
const palette = new CommandPalette({ commands });

// Add items to palette
palette.addItem({
  command: 'file:new',
  category: 'File',
  rank: 100
});

palette.addItem({
  command: 'edit:find',
  category: 'Edit',
  rank: 200
});

// User can now search and execute commands
// Typing "new" will show the "New File" command
// Pressing Enter or clicking executes the command

/**
 * A custom scrollbar widget.
 * Provides precise scroll control with customizable appearance and behavior.
 */
class ScrollBar extends Widget {
  /**
   * Construct a new scrollbar.
   * @param options - The options for initializing the scrollbar
   */
  constructor(options?: ScrollBar.IOptions);

  /** The orientation of the scrollbar */
  orientation: ScrollBar.Orientation;

  /** The current value of the scrollbar */
  value: number;

  /** The page size for the scrollbar */
  page: number;

  /** The maximum value for the scrollbar */
  maximum: number;

  /** The decrement button node (read-only) */
  readonly decrementNode: HTMLDivElement;

  /** The increment button node (read-only) */
  readonly incrementNode: HTMLDivElement;

  /** The track node (read-only) */
  readonly trackNode: HTMLDivElement;

  /** The thumb node (read-only) */
  readonly thumbNode: HTMLDivElement;

  /** A signal emitted when the thumb position changes */
  readonly thumbMoved: ISignal<this, number>;

  /** A signal emitted when a step is requested */
  readonly stepRequested: ISignal<this, 'decrement' | 'increment'>;

  /** A signal emitted when a page step is requested */
  readonly pageRequested: ISignal<this, 'decrement' | 'increment'>;

  /** Handle DOM events for the scrollbar */
  handleEvent(event: Event): void;
}

namespace ScrollBar {
  /**
   * Options for initializing a scrollbar.
   */
  interface IOptions extends Widget.IOptions {
    /** The orientation of the scrollbar (default: 'vertical') */
    orientation?: Orientation;
    
    /** The initial value (default: 0) */
    value?: number;
    
    /** The page size (default: 10) */
    page?: number;
    
    /** The maximum value (default: 100) */
    maximum?: number;
  }

  /**
   * The available orientations for a scrollbar.
   */
  type Orientation = 'horizontal' | 'vertical';
}

import { ScrollBar } from "@lumino/widgets";

// Create vertical scrollbar
const scrollBar = new ScrollBar({
  orientation: 'vertical',
  value: 0,
  page: 10,
  maximum: 100
});

// Handle scroll events
scrollBar.thumbMoved.connect((sender, value) => {
  console.log(`Scrolled to position: ${value}`);
  // Update content position based on scroll value
  updateContentPosition(value);
});

scrollBar.stepRequested.connect((sender, direction) => {
  const step = 1;
  const newValue = direction === 'increment' 
    ? Math.min(scrollBar.value + step, scrollBar.maximum)
    : Math.max(scrollBar.value - step, 0);
  scrollBar.value = newValue;
});

scrollBar.pageRequested.connect((sender, direction) => {
  const newValue = direction === 'increment'
    ? Math.min(scrollBar.value + scrollBar.page, scrollBar.maximum)
    : Math.max(scrollBar.value - scrollBar.page, 0);
  scrollBar.value = newValue;
});

function updateContentPosition(value: number) {
  // Update the position of scrollable content
  const percentage = value / scrollBar.maximum;
  // Apply scroll position to content
}