@chatui/core
Version:
The React library for Chatbot UI
74 lines • 2.73 kB
JavaScript
import _slicedToArray from "@babel/runtime/helpers/esm/slicedToArray";
import React, { useState, useEffect, useRef } from 'react';
import { useLatest } from '../../hooks/useLatest';
var indicatorWidth = 20;
export function ScrollGrid(_ref) {
var _ref$wrap = _ref.wrap,
wrap = _ref$wrap === void 0 ? false : _ref$wrap,
children = _ref.children,
onIndicatorToggle = _ref.onIndicatorToggle;
var _useState = useState(false),
_useState2 = _slicedToArray(_useState, 2),
showIndicator = _useState2[0],
setShowIndicator = _useState2[1];
var _useState3 = useState(0),
_useState4 = _slicedToArray(_useState3, 2),
barWidth = _useState4[0],
setBarWidth = _useState4[1];
var _useState5 = useState(0),
_useState6 = _slicedToArray(_useState5, 2),
barLeft = _useState6[0],
setBarLeft = _useState6[1];
var scrollerRef = useRef(null);
var ratioRef = useRef(0.04);
var onIndicatorToggleRef = useLatest(onIndicatorToggle);
useEffect(function () {
if (wrap) return;
function updateIndicator() {
var scroller = scrollerRef.current;
if (!scroller) return;
var scrollWidth = scroller.scrollWidth,
clientWidth = scroller.clientWidth;
if (scrollWidth === clientWidth) {
setShowIndicator(false);
return;
}
var ratio = indicatorWidth / scrollWidth;
ratioRef.current = ratio;
setShowIndicator(true);
setBarWidth(clientWidth * ratio);
}
updateIndicator();
window.addEventListener('resize', updateIndicator);
return function () {
window.removeEventListener('resize', updateIndicator);
};
}, [wrap]);
useEffect(function () {
var _onIndicatorToggleRef;
(_onIndicatorToggleRef = onIndicatorToggleRef.current) === null || _onIndicatorToggleRef === void 0 || _onIndicatorToggleRef.call(onIndicatorToggleRef, showIndicator);
}, [onIndicatorToggleRef, showIndicator]);
var handleScroll = function handleScroll(e) {
var _ref2 = e.target,
scrollLeft = _ref2.scrollLeft;
setBarLeft(scrollLeft * ratioRef.current);
};
return /*#__PURE__*/React.createElement("div", {
className: "ScrollGrid",
"data-wrap": wrap
}, /*#__PURE__*/React.createElement("div", {
className: "ScrollGrid-scroller",
ref: scrollerRef,
onScroll: wrap ? undefined : handleScroll
}, /*#__PURE__*/React.createElement("div", {
className: "ScrollGrid-inner"
}, children)), showIndicator && /*#__PURE__*/React.createElement("div", {
className: "ScrollGrid-indicator"
}, /*#__PURE__*/React.createElement("div", {
className: "ScrollGrid-indicatorBar",
style: {
width: barWidth,
transform: "translateX(".concat(barLeft, "px)")
}
})));
}