TypeScript IConfiguration.onDidChange方法代码示例

	constructor(configuration: IConfiguration, privateViewEventBus: IViewEventBus, linesContent: HTMLElement, viewDomNode: HTMLElement, overflowGuardDomNode: HTMLElement) {
		this.toDispose = [];
		this.configuration = configuration;
		this.privateViewEventBus = privateViewEventBus;
		this.linesContent = linesContent;

		let configScrollbarOpts = this.configuration.editor.viewInfo.scrollbar;

		let scrollbarOptions: ScrollableElementCreationOptions = {
			canUseTranslate3d: this.configuration.editor.viewInfo.canUseTranslate3d,
			listenOnDomNode: viewDomNode,
			vertical: configScrollbarOpts.vertical,
			horizontal: configScrollbarOpts.horizontal,
			className: ClassNames.SCROLLABLE_ELEMENT + ' ' + this.configuration.editor.viewInfo.theme,
			useShadows: false,
			lazyRender: true,
			saveLastScrollTimeOnClassName: ClassNames.VIEW_LINE
		};
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'verticalHasArrows');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'horizontalHasArrows');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'verticalScrollbarSize');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'verticalSliderSize');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'horizontalScrollbarSize');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'horizontalSliderSize');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'handleMouseWheel');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'arrowSize');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'mouseWheelScrollSensitivity');

		this.scrollbar = new ScrollableElement(linesContent, scrollbarOptions);
		this.onLayoutInfoChanged();
		this.toDispose.push(this.scrollbar);
		this.toDispose.push(this.scrollbar.onScroll((e: IScrollEvent) => {
			this.privateViewEventBus.emit(EventType.ViewScrollChanged, e);
		}));

		this.toDispose.push(this.configuration.onDidChange((e: IConfigurationChangedEvent) => {
			this.scrollbar.updateClassName(ClassNames.SCROLLABLE_ELEMENT + ' ' + this.configuration.editor.viewInfo.theme);
			if (e.viewInfo.scrollbar || e.viewInfo.canUseTranslate3d) {
				let newOpts: ScrollableElementChangeOptions = {
					canUseTranslate3d: this.configuration.editor.viewInfo.canUseTranslate3d,
					handleMouseWheel: this.configuration.editor.viewInfo.scrollbar.handleMouseWheel,
					mouseWheelScrollSensitivity: this.configuration.editor.viewInfo.scrollbar.mouseWheelScrollSensitivity
				};
				this.scrollbar.updateOptions(newOpts);
			}
		}));

		// When having a zone widget that calls .focus() on one of its dom elements,
		// the browser will try desperately to reveal that dom node, unexpectedly
		// changing the .scrollTop of this.linesContent

		let onBrowserDesperateReveal = (domNode: HTMLElement, lookAtScrollTop: boolean, lookAtScrollLeft: boolean) => {
			let newScrollPosition: INewScrollPosition = {};

			if (lookAtScrollTop) {
				let deltaTop = domNode.scrollTop;
				if (deltaTop) {
					newScrollPosition.scrollTop = this.getScrollTop() + deltaTop;
					domNode.scrollTop = 0;
				}
			}

			if (lookAtScrollLeft) {
				let deltaLeft = domNode.scrollLeft;
				if (deltaLeft) {
					newScrollPosition.scrollLeft = this.getScrollLeft() + deltaLeft;
					domNode.scrollLeft = 0;
				}
			}

			this.setScrollPosition(newScrollPosition);
		};

		// I've seen this happen both on the view dom node & on the lines content dom node.
		this.toDispose.push(dom.addDisposableListener(viewDomNode, 'scroll', (e: Event) => onBrowserDesperateReveal(viewDomNode, true, true)));
		this.toDispose.push(dom.addDisposableListener(linesContent, 'scroll', (e: Event) => onBrowserDesperateReveal(linesContent, true, false)));
		this.toDispose.push(dom.addDisposableListener(overflowGuardDomNode, 'scroll', (e: Event) => onBrowserDesperateReveal(overflowGuardDomNode, true, false)));
	}

	constructor(scrollable:EditorScrollable, configuration:IConfiguration, privateViewEventBus:IViewEventBus, linesContent:HTMLElement, viewDomNode:HTMLElement, overflowGuardDomNode:HTMLElement) {
		this.toDispose = [];
		this.scrollable = scrollable;
		this.configuration = configuration;
		this.privateViewEventBus = privateViewEventBus;
		this.linesContent = linesContent;

		this.toDispose.push(this.scrollable.addScrollListener((e:IScrollEvent) => {
			this.privateViewEventBus.emit(EventType.ViewScrollChanged, e);
		}));

		var configScrollbarOpts = this.configuration.editor.scrollbar;

		var scrollbarOptions:IScrollableElementCreationOptions = {
			listenOnDomNode: viewDomNode,
			vertical: configScrollbarOpts.vertical,
			horizontal: configScrollbarOpts.horizontal,
			className: ClassNames.SCROLLABLE_ELEMENT + ' ' + this.configuration.editor.theme,
			useShadows: false,
			lazyRender: true,
			saveLastScrollTimeOnClassName: ClassNames.VIEW_LINE
		};
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'verticalHasArrows');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'horizontalHasArrows');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'verticalScrollbarSize');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'verticalSliderSize');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'horizontalScrollbarSize');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'horizontalSliderSize');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'handleMouseWheel');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'arrowSize');
		addPropertyIfPresent(configScrollbarOpts, scrollbarOptions, 'mouseWheelScrollSensitivity');


		this.scrollbar = new ScrollableElement(linesContent, this.scrollable, scrollbarOptions, {
			width: this.configuration.editor.layoutInfo.contentWidth,
			height: this.configuration.editor.layoutInfo.contentHeight,
		});
		this.toDispose.push(this.scrollbar);

		this.toDispose.push(this.configuration.onDidChange((e:IConfigurationChangedEvent) => {
			this.scrollbar.updateClassName(this.configuration.editor.theme);
			if (e.scrollbar) {
				this.scrollbar.updateOptions(this.configuration.editor.scrollbar);
			}
		}));

		// When having a zone widget that calls .focus() on one of its dom elements,
		// the browser will try desperately to reveal that dom node, unexpectedly
		// changing the .scrollTop of this.linesContent

		var onBrowserDesperateReveal = (domNode:HTMLElement, lookAtScrollTop:boolean, lookAtScrollLeft:boolean) => {
			if (lookAtScrollTop) {
				var deltaTop = domNode.scrollTop;
				if (deltaTop) {
					this.scrollable.setScrollTop(this.scrollable.getScrollTop() + deltaTop);
					domNode.scrollTop = 0;
				}
			}

			if (lookAtScrollLeft) {
				var deltaLeft = domNode.scrollLeft;
				if (deltaLeft) {
					this.scrollable.setScrollLeft(this.scrollable.getScrollLeft() + deltaLeft);
					domNode.scrollLeft = 0;
				}
			}
		};

		// I've seen this happen both on the view dom node & on the lines content dom node.
		this.toDispose.push(dom.addDisposableListener(viewDomNode, 'scroll', (e:Event) => onBrowserDesperateReveal(viewDomNode, true, true)));
		this.toDispose.push(dom.addDisposableListener(linesContent, 'scroll', (e:Event) => onBrowserDesperateReveal(linesContent, true, false)));
		this.toDispose.push(dom.addDisposableListener(overflowGuardDomNode, 'scroll', (e:Event) => onBrowserDesperateReveal(overflowGuardDomNode, true, false)));
	}