src/vs/editor/browser/controller/mouseTarget.ts/HitTestContext/constructor
class HitTestContext:	constructor(context: ViewContext, viewHelper: IPointerHandlerHelper, lastRenderData: PointerHandlerLastRenderData) {
		this.viewModel = context.viewModel;
		const options = context.configuration.options;
		this.layoutInfo = options.get(EditorOption.layoutInfo);
		this.viewDomNode = viewHelper.viewDomNode;
		this.lineHeight = options.get(EditorOption.lineHeight);
		this.stickyTabStops = options.get(EditorOption.stickyTabStops);
		this.typicalHalfwidthCharacterWidth = options.get(EditorOption.fontInfo).typicalHalfwidthCharacterWidth;
		this.lastRenderData = lastRenderData;
		this._context = context;
		this._viewHelper = viewHelper;
	}