import "./waves.css";

export default{
  bind(el, binding) {
    el.addEventListener("click", e => {
      const customOpts = Object.assign({}, binding.value);
      const opts = Object.assign({
        ele: el, //  波纹作用元素
        type: "hit", //  hit 点击位置扩散 center中心点扩展
        color: "rgba(0, 0, 0, 0.15)" //  波纹颜色
      }, customOpts);
      const target = opts.ele;
      if (target) {
        target.style.position = "relative";
        target.style.overflow = "hidden";
        const rect = target.getBoundingClientRect();
        let ripple = target.querySelector(".waves-ripple");
        if (!ripple) {
          ripple = document.createElement("span");
          ripple.className = "waves-ripple";
          ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + "px";
          target.appendChild(ripple);
        } else {
          ripple.className = "waves-ripple";
        }
        switch (opts.type) {
          case "center":
            ripple.style.top = (rect.height / 2 - ripple.offsetHeight / 2) + "px";
            ripple.style.left = (rect.width / 2 - ripple.offsetWidth / 2) + "px";
            break;
          default:
            ripple.style.top = (e.pageY - rect.top - ripple.offsetHeight / 2 - document.documentElement.scrollTop || document.body.scrollTop) + "px";
            ripple.style.left = (e.pageX - rect.left - ripple.offsetWidth / 2 - document.documentElement.scrollLeft || document.body.scrollLeft) + "px";
        }
        ripple.style.backgroundColor = opts.color;
        ripple.className = "waves-ripple z-active";
        return false;
      }
    }, false);
  }
};