TypeScript dom.getDomNodePosition函數代碼示例

	private _layoutBoxInPage(position: editorCommon.IEditorPosition, domNode: HTMLElement, ctx: IRenderingContext): IBoxLayoutResult {
		let visibleRange = ctx.visibleRangeForPosition(position);

		if (!visibleRange) {
			return null;
		}

		let left0 = visibleRange.left - ctx.viewportLeft;

		let width = domNode.clientWidth,
			height = domNode.clientHeight;

		if (left0 + width < 0 || left0 > this._contentWidth) {
			return null;
		}

		let aboveTop = visibleRange.top - height,
			belowTop = visibleRange.top + this._context.configuration.editor.lineHeight,
			left = left0 + this._contentLeft;

		let domNodePosition = dom.getDomNodePosition(this._viewDomNode);
		let absoluteAboveTop = domNodePosition.top + aboveTop - document.body.scrollTop - document.documentElement.scrollTop,
			absoluteBelowTop = domNodePosition.top + belowTop - document.body.scrollTop - document.documentElement.scrollTop,
			absoluteLeft = domNodePosition.left + left - document.body.scrollLeft - document.documentElement.scrollLeft;

		let INNER_WIDTH = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
			INNER_HEIGHT = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;

		// Leave some clearance to the bottom
		let BOTTOM_PADDING = 22;

		let fitsAbove = (absoluteAboveTop >= 0),
			fitsBelow = (absoluteBelowTop + height <= INNER_HEIGHT - BOTTOM_PADDING);

		if (absoluteLeft + width + 20 > INNER_WIDTH) {
			let delta = absoluteLeft - (INNER_WIDTH - width - 20);
			absoluteLeft -= delta;
			left -= delta;
		}
		if (absoluteLeft < 0) {
			let delta = absoluteLeft;
			absoluteLeft -= delta;
			left -= delta;
		}

		return {
			aboveTop: aboveTop,
			fitsAbove: fitsAbove,
			belowTop: belowTop,
			fitsBelow: fitsBelow,
			left: left
		};
	}

	private _onMouseDown(e: IMouseEvent): void {
		let domNodePosition = DomUtils.getDomNodePosition(this.domNode.domNode);
		let desiredSliderPosition = this._mouseDownRelativePosition(e, domNodePosition) - this._scrollbarState.getArrowSize() - this._scrollbarState.getSliderSize() / 2;
		this.setDesiredScrollPosition(this._scrollbarState.convertSliderPositionToScrollPosition(desiredSliderPosition));
		this._sliderMouseDown(e);
	}