Function calcTooltipPosition

src/component/tooltip/TooltipView.ts:1168–1203

(
    position: TooltipOption['position'],
    rect: ZRRectLike,
    contentSize: number[],
    borderWidth: number
)

}

function calcTooltipPosition(
    position: TooltipOption['position'],
    rect: ZRRectLike,
    contentSize: number[],
    borderWidth: number
): [number, number] {
    const domWidth = contentSize[0];
    const domHeight = contentSize[1];
    const offset = Math.ceil(Math.SQRT2 * borderWidth) + 8;
    let x = 0;
    let y = 0;
    const rectWidth = rect.width;
    const rectHeight = rect.height;
    switch (position) {
        case 'inside':
            x = rect.x + rectWidth / 2 - domWidth / 2;
            y = rect.y + rectHeight / 2 - domHeight / 2;
            break;
        case 'top':
            x = rect.x + rectWidth / 2 - domWidth / 2;
            y = rect.y - domHeight - offset;
            break;
        case 'bottom':
            x = rect.x + rectWidth / 2 - domWidth / 2;
            y = rect.y + rectHeight + offset;
            break;
        case 'left':
            x = rect.x - domWidth - offset;
            y = rect.y + rectHeight / 2 - domHeight / 2;
            break;
        case 'right':
            x = rect.x + rectWidth + offset;
            y = rect.y + rectHeight / 2 - domHeight / 2;
    }
    return [x, y];
}

function isCenterAlign(align: HorizontalAlign | VerticalAlign) {
    return align === 'center' || align === 'middle';