78 lines
2.7 KiB
JavaScript
78 lines
2.7 KiB
JavaScript
import { useRef } from 'react';
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import raf from "rc-util/es/raf";
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import isFF from '../utils/isFirefox';
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import useOriginScroll from './useOriginScroll';
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export default function useFrameWheel(inVirtual, isScrollAtTop, isScrollAtBottom, horizontalScroll,
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/***
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* Return `true` when you need to prevent default event
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*/
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onWheelDelta) {
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var offsetRef = useRef(0);
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var nextFrameRef = useRef(null);
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// Firefox patch
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var wheelValueRef = useRef(null);
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var isMouseScrollRef = useRef(false);
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// Scroll status sync
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var originScroll = useOriginScroll(isScrollAtTop, isScrollAtBottom);
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function onWheelY(event, deltaY) {
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raf.cancel(nextFrameRef.current);
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offsetRef.current += deltaY;
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wheelValueRef.current = deltaY;
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// Do nothing when scroll at the edge, Skip check when is in scroll
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if (originScroll(deltaY)) return;
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// Proxy of scroll events
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if (!isFF) {
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event.preventDefault();
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}
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nextFrameRef.current = raf(function () {
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// Patch a multiple for Firefox to fix wheel number too small
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// ref: https://github.com/ant-design/ant-design/issues/26372#issuecomment-679460266
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var patchMultiple = isMouseScrollRef.current ? 10 : 1;
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onWheelDelta(offsetRef.current * patchMultiple);
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offsetRef.current = 0;
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});
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}
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function onWheelX(event, deltaX) {
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onWheelDelta(deltaX, true);
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if (!isFF) {
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event.preventDefault();
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}
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}
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// Check for which direction does wheel do. `sx` means `shift + wheel`
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var wheelDirectionRef = useRef(null);
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var wheelDirectionCleanRef = useRef(null);
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function onWheel(event) {
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if (!inVirtual) return;
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// Wait for 2 frame to clean direction
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raf.cancel(wheelDirectionCleanRef.current);
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wheelDirectionCleanRef.current = raf(function () {
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wheelDirectionRef.current = null;
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}, 2);
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var deltaX = event.deltaX,
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deltaY = event.deltaY,
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shiftKey = event.shiftKey;
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var mergedDeltaX = deltaX;
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var mergedDeltaY = deltaY;
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if (wheelDirectionRef.current === 'sx' || !wheelDirectionRef.current && (shiftKey || false) && deltaY && !deltaX) {
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mergedDeltaX = deltaY;
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mergedDeltaY = 0;
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wheelDirectionRef.current = 'sx';
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}
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var absX = Math.abs(mergedDeltaX);
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var absY = Math.abs(mergedDeltaY);
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if (wheelDirectionRef.current === null) {
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wheelDirectionRef.current = horizontalScroll && absX > absY ? 'x' : 'y';
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}
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if (wheelDirectionRef.current === 'y') {
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onWheelY(event, mergedDeltaY);
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} else {
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onWheelX(event, mergedDeltaX);
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}
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}
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// A patch for firefox
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function onFireFoxScroll(event) {
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if (!inVirtual) return;
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isMouseScrollRef.current = event.detail === wheelValueRef.current;
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}
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return [onWheel, onFireFoxScroll];
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} |