Function getCenterPoint

entrypoints/utils/common.ts:40–56

(touches: TouchList, point: number)

// 获取触摸点的中心位置
export function getCenterPoint(touches: TouchList, point: number): { x: number, y: number } | undefined {
    // 检查触摸点数量是否等于指定的数量
    if (touches.length !== point) return;

    let centerX = 0;
    let centerY = 0;
    // 累加所有触摸点的坐标
    for (let i = 0; i < touches.length; i++) {
        centerX += touches[i].clientX;
        centerY += touches[i].clientY;
    }
    // 计算中心点坐标
    centerX /= touches.length;
    centerY /= touches.length;

    return {x: centerX, y: centerY};
}

// 按 selector 查找匹配的元素，返回匹配的元素或 false
export function findMatchingElement(element: Element, selector: string): Element | false {