69 lines
3.3 KiB
JavaScript
69 lines
3.3 KiB
JavaScript
import {useEvent as $e9faafb641e167db$export$90fc3a17d93f704c} from "./useEvent.module.js";
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import {useLayoutEffect as $f0a04ccd8dbdd83b$export$e5c5a5f917a5871c} from "./useLayoutEffect.module.js";
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import {useRef as $hDRkU$useRef, useCallback as $hDRkU$useCallback} from "react";
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/*
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* Copyright 2024 Adobe. All rights reserved.
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* This file is licensed to you under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License. You may obtain a copy
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* of the License at http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under
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* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
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* OF ANY KIND, either express or implied. See the License for the specific language
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* governing permissions and limitations under the License.
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*/
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function $26f7f3da73fcd9d6$export$7717c92ee915373e(props, ref) {
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let { isLoading: isLoading, onLoadMore: onLoadMore, scrollOffset: scrollOffset = 1, items: items } = props;
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// Handle scrolling, and call onLoadMore when nearing the bottom.
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let isLoadingRef = (0, $hDRkU$useRef)(isLoading);
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let prevProps = (0, $hDRkU$useRef)(props);
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let onScroll = (0, $hDRkU$useCallback)(()=>{
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if (ref.current && !isLoadingRef.current && onLoadMore) {
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let shouldLoadMore = ref.current.scrollHeight - ref.current.scrollTop - ref.current.clientHeight < ref.current.clientHeight * scrollOffset;
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if (shouldLoadMore) {
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isLoadingRef.current = true;
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onLoadMore();
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}
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}
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}, [
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onLoadMore,
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ref,
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scrollOffset
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]);
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let lastItems = (0, $hDRkU$useRef)(items);
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(0, $f0a04ccd8dbdd83b$export$e5c5a5f917a5871c)(()=>{
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// Only update isLoadingRef if props object actually changed,
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// not if a local state change occurred.
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if (props !== prevProps.current) {
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isLoadingRef.current = isLoading;
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prevProps.current = props;
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}
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// TODO: Eventually this hook will move back into RAC during which we will accept the collection as a option to this hook.
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// We will only load more if the collection has changed after the last load to prevent multiple onLoadMore from being called
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// while the data from the last onLoadMore is being processed by RAC collection.
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let shouldLoadMore = (ref === null || ref === void 0 ? void 0 : ref.current) && !isLoadingRef.current && onLoadMore && (!items || items !== lastItems.current) && ref.current.clientHeight === ref.current.scrollHeight;
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if (shouldLoadMore) {
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isLoadingRef.current = true;
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onLoadMore === null || onLoadMore === void 0 ? void 0 : onLoadMore();
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}
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lastItems.current = items;
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}, [
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isLoading,
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onLoadMore,
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props,
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ref,
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items
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]);
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// TODO: maybe this should still just return scroll props?
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// Test against case where the ref isn't defined when this is called
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// Think this was a problem when trying to attach to the scrollable body of the table in OnLoadMoreTableBodyScroll
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(0, $e9faafb641e167db$export$90fc3a17d93f704c)(ref, 'scroll', onScroll);
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}
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export {$26f7f3da73fcd9d6$export$7717c92ee915373e as useLoadMore};
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//# sourceMappingURL=useLoadMore.module.js.map
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