TypeScript viewEventDispatcher.ViewEventDispatcher类代码示例

	constructor(
		commandService: ICommandService,
		configuration: Configuration,
		model: IViewModel,
		private triggerCursorHandler: TriggerCursorHandler
	) {
		super();
		this._isDisposed = false;
		this._renderAnimationFrame = null;
		this.outgoingEvents = new ViewOutgoingEvents(model);

		let viewController = new ViewController(model, triggerCursorHandler, this.outgoingEvents, commandService);

		this.listenersToRemove = [];
		this.listenersToDispose = [];

		// The event dispatcher will always go through _renderOnce before dispatching any events
		this.eventDispatcher = new ViewEventDispatcher((callback: () => void) => this._renderOnce(callback));

		// Ensure the view is the first event handler in order to update the layout
		this.eventDispatcher.addEventHandler(this);

		// The layout provider has such responsibilities as:
		// - scrolling (i.e. viewport / full size) & co.
		// - whitespaces (a.k.a. view zones) management & co.
		// - line heights updating & co.
		this.layoutProvider = new LayoutProvider(configuration, model.getLineCount(), this.eventDispatcher);

		// The view context is passed on to most classes (basically to reduce param. counts in ctors)
		this._context = new ViewContext(configuration, model, this.eventDispatcher);

		this.createTextArea();
		this.createViewParts();
		this._setLayout();

		// Keyboard handler
		this.keyboardHandler = new KeyboardHandler(this._context, viewController, this.createKeyboardHandlerHelper());

		// Pointer handler
		this.pointerHandler = new PointerHandler(this._context, viewController, this.createPointerHandlerHelper());

		this.hasFocus = false;
		this.codeEditorHelper = null;


		// The view lines rendering calls model.getLineTokens() that might emit events that its tokens have changed.
		// This delayed processing of incoming model events acts as a guard against undesired/unexpected recursion.
		this.handleAccumulatedModelEventsTimeout = -1;
		this.accumulatedModelEvents = [];
		this.listenersToRemove.push(model.addEventListener((events: viewEvents.ViewEvent[]) => {
			this.accumulatedModelEvents = this.accumulatedModelEvents.concat(events);
			if (this.handleAccumulatedModelEventsTimeout === -1) {
				this.handleAccumulatedModelEventsTimeout = setTimeout(() => {
					this.handleAccumulatedModelEventsTimeout = -1;
					this._flushAnyAccumulatedEvents();
				});
			}
		}));
	}

	constructor(
		commandService: ICommandService,
		configuration: Configuration,
		themeService: IThemeService,
		model: IViewModel,
		cursor: Cursor,
		execCoreEditorCommandFunc: ExecCoreEditorCommandFunc
	) {
		super();
		this._isDisposed = false;
		this._cursor = cursor;
		this._renderAnimationFrame = null;
		this.outgoingEvents = new ViewOutgoingEvents(model);

		let viewController = new ViewController(configuration, model, execCoreEditorCommandFunc, this.outgoingEvents, commandService);

		// The event dispatcher will always go through _renderOnce before dispatching any events
		this.eventDispatcher = new ViewEventDispatcher((callback: () => void) => this._renderOnce(callback));

		// Ensure the view is the first event handler in order to update the layout
		this.eventDispatcher.addEventHandler(this);

		// The view context is passed on to most classes (basically to reduce param. counts in ctors)
		this._context = new ViewContext(configuration, themeService.getTheme(), model, this.eventDispatcher);

		this._register(themeService.onThemeChange(theme => {
			this._context.theme = theme;
			this.eventDispatcher.emit(new viewEvents.ViewThemeChangedEvent());
			this.render(true, false);
		}));

		this.viewParts = [];

		// Keyboard handler
		this._textAreaHandler = new TextAreaHandler(this._context, viewController, this.createTextAreaHandlerHelper());
		this.viewParts.push(this._textAreaHandler);

		this.createViewParts();
		this._setLayout();

		// Pointer handler
		this.pointerHandler = new PointerHandler(this._context, viewController, this.createPointerHandlerHelper());

		this._register(model.addEventListener((events: viewEvents.ViewEvent[]) => {
			this.eventDispatcher.emitMany(events);
		}));

		this._register(this._cursor.addEventListener((events: viewEvents.ViewEvent[]) => {
			this.eventDispatcher.emitMany(events);
		}));
	}

	constructor(
		commandService: ICommandService,
		configuration: Configuration,
		model: IViewModel,
		execCoreEditorCommandFunc: ExecCoreEditorCommandFunc
	) {
		super();
		this._isDisposed = false;
		this._renderAnimationFrame = null;
		this.outgoingEvents = new ViewOutgoingEvents(model);

		let viewController = new ViewController(model, execCoreEditorCommandFunc, this.outgoingEvents, commandService);

		// The event dispatcher will always go through _renderOnce before dispatching any events
		this.eventDispatcher = new ViewEventDispatcher((callback: () => void) => this._renderOnce(callback));

		// Ensure the view is the first event handler in order to update the layout
		this.eventDispatcher.addEventHandler(this);

		// The layout provider has such responsibilities as:
		// - scrolling (i.e. viewport / full size) & co.
		// - whitespaces (a.k.a. view zones) management & co.
		// - line heights updating & co.
		this.layoutProvider = new ViewLayout(configuration, model.getLineCount(), this.eventDispatcher);

		// The view context is passed on to most classes (basically to reduce param. counts in ctors)
		this._context = new ViewContext(configuration, model, this.eventDispatcher);

		this.viewParts = [];

		// Keyboard handler
		this._textAreaHandler = new TextAreaHandler(this._context, viewController, this.createTextAreaHandlerHelper());
		this.viewParts.push(this._textAreaHandler);

		this.createViewParts();
		this._setLayout();

		// Pointer handler
		this.pointerHandler = new PointerHandler(this._context, viewController, this.createPointerHandlerHelper());

		this._register(model.addEventListener((events: viewEvents.ViewEvent[]) => {
			this.eventDispatcher.emitMany(events);
		}));
	}

	public dispose(): void {
		this._isDisposed = true;
		if (this.handleAccumulatedModelEventsTimeout !== -1) {
			clearTimeout(this.handleAccumulatedModelEventsTimeout);
			this.handleAccumulatedModelEventsTimeout = -1;
		}
		if (this._renderAnimationFrame !== null) {
			this._renderAnimationFrame.dispose();
			this._renderAnimationFrame = null;
		}
		this.accumulatedModelEvents = [];

		this.eventDispatcher.removeEventHandler(this);
		this.outgoingEvents.dispose();
		this.listenersToRemove = dispose(this.listenersToRemove);
		this.listenersToDispose = dispose(this.listenersToDispose);

		this.keyboardHandler.dispose();
		this.pointerHandler.dispose();

		this.viewLines.dispose();

		// Destroy view parts
		for (let i = 0, len = this.viewParts.length; i < len; i++) {
			this.viewParts[i].dispose();
		}
		this.viewParts = [];

		this.layoutProvider.dispose();
	}

	private _flushAnyAccumulatedEvents(): void {
		let toEmit = this.accumulatedModelEvents;
		this.accumulatedModelEvents = [];
		if (toEmit.length > 0) {
			this.eventDispatcher.emitMany(toEmit);
		}
	}

	public dispose(): void {
		if (this._renderAnimationFrame !== null) {
			this._renderAnimationFrame.dispose();
			this._renderAnimationFrame = null;
		}

		this.eventDispatcher.removeEventHandler(this);
		this.outgoingEvents.dispose();

		this.viewLines.dispose();

		// Destroy view parts
		for (let i = 0, len = this.viewParts.length; i < len; i++) {
			this.viewParts[i].dispose();
		}
		this.viewParts = [];

		super.dispose();
	}

		this._register(this._cursor.addEventListener((events: viewEvents.ViewEvent[]) => {
			this.eventDispatcher.emitMany(events);
		}));

	public removeEventHandler(eventHandler: ViewEventHandler): void {
		this.privateViewEventBus.removeEventHandler(eventHandler);
	}

	public addEventHandler(eventHandler: ViewEventHandler): void {
		this.privateViewEventBus.addEventHandler(eventHandler);
	}