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chore(web): story page change on user scroll (#671)
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145 changes: 145 additions & 0 deletions
145
web/src/beta/features/Editor/StoryPanel/PanelContent/index.tsx
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,145 @@ | ||
| import { Fragment, useEffect, useMemo, useRef } from "react"; | ||
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| import { InstallableStoryBlock } from "@reearth/services/api/storytellingApi/blocks"; | ||
| import { styled } from "@reearth/services/theme"; | ||
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| import { StoryPageFragmentFragment } from "../hooks"; | ||
| import StoryPage from "../Page"; | ||
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| export const pagesElementId = "story-page-content"; | ||
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| export type Props = { | ||
| sceneId?: string; | ||
| storyId?: string; | ||
| pages?: StoryPageFragmentFragment[]; | ||
| selectedPageId?: string; | ||
| installableStoryBlocks?: InstallableStoryBlock[]; | ||
| selectedStoryBlockId?: string; | ||
| showPageSettings?: boolean; | ||
| showingIndicator?: boolean; | ||
| isAutoScrolling?: boolean; | ||
| onAutoScrollingChange: (isScrolling: boolean) => void; | ||
| onPageSettingsToggle?: () => void; | ||
| onPageSelect?: (pageId?: string | undefined) => void; | ||
| onBlockSelect: (blockId?: string) => void; | ||
| onCurrentPageChange?: (pageId: string) => void; | ||
| }; | ||
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| const StoryContent: React.FC<Props> = ({ | ||
| sceneId, | ||
| storyId, | ||
| pages, | ||
| selectedPageId, | ||
| installableStoryBlocks, | ||
| selectedStoryBlockId, | ||
| showPageSettings, | ||
| showingIndicator, | ||
| isAutoScrolling, | ||
| onAutoScrollingChange, | ||
| onPageSettingsToggle, | ||
| onPageSelect, | ||
| onBlockSelect, | ||
| onCurrentPageChange, | ||
| }) => { | ||
| const scrollRef = useRef<number | undefined>(undefined); | ||
| const scrollTimeoutRef = useRef<NodeJS.Timeout>(); | ||
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| const pageHeight = useMemo(() => { | ||
| const element = document.getElementById(pagesElementId); | ||
| return element?.clientHeight; | ||
| }, []); | ||
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| useEffect(() => { | ||
| const ids = pages?.map(p => p.id) as string[]; | ||
| const panelContentElement = document.getElementById(pagesElementId); | ||
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| const observer = new IntersectionObserver( | ||
| entries => { | ||
| if (isAutoScrolling) return; // to avoid conflicts with page selection in editor UI | ||
| entries.forEach(entry => { | ||
| const id = entry.target.getAttribute("id") ?? ""; | ||
| if (selectedPageId === id) return; | ||
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| const diff = (scrollRef.current as number) - (panelContentElement?.scrollTop as number); | ||
| const isScrollingUp = diff > 0; | ||
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| if (entry.isIntersecting) { | ||
| onCurrentPageChange?.(id); | ||
| scrollRef.current = panelContentElement?.scrollTop; | ||
| return; | ||
| } | ||
| const currentIndex = ids?.indexOf(id) as number; | ||
| const prevEntry = ids[currentIndex - 1]; | ||
| if (isScrollingUp) { | ||
| const id = prevEntry; | ||
| onCurrentPageChange?.(id); | ||
| } | ||
| }); | ||
| }, | ||
| { | ||
| root: panelContentElement, | ||
| threshold: 0.2, | ||
| }, | ||
| ); | ||
| ids?.forEach(id => { | ||
| const e = document.getElementById(id); | ||
| if (e) { | ||
| observer.observe(e); | ||
| } | ||
| }); | ||
| return () => { | ||
| ids?.forEach(id => { | ||
| const e = document.getElementById(id); | ||
| if (e) { | ||
| observer.unobserve(e); | ||
| } | ||
| }); | ||
| }; | ||
| }, [pages, selectedPageId, isAutoScrolling, onCurrentPageChange]); | ||
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| useEffect(() => { | ||
| const wrapperElement = document.getElementById(pagesElementId); | ||
| if (isAutoScrolling) { | ||
| wrapperElement?.addEventListener("scroll", () => { | ||
| clearTimeout(scrollTimeoutRef.current); | ||
| scrollTimeoutRef.current = setTimeout(function () { | ||
| onAutoScrollingChange(false); | ||
| }, 100); | ||
| }); | ||
| } | ||
| }, [isAutoScrolling, onAutoScrollingChange]); | ||
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| return ( | ||
| <PagesWrapper id={pagesElementId} showingIndicator={showingIndicator}> | ||
| {pages?.map(p => ( | ||
| <Fragment key={p.id}> | ||
| <StoryPage | ||
| sceneId={sceneId} | ||
| storyId={storyId} | ||
| page={p} | ||
| selectedPageId={selectedPageId} | ||
| installableStoryBlocks={installableStoryBlocks} | ||
| selectedStoryBlockId={selectedStoryBlockId} | ||
| showPageSettings={showPageSettings} | ||
| onPageSettingsToggle={onPageSettingsToggle} | ||
| onPageSelect={onPageSelect} | ||
| onBlockSelect={onBlockSelect} | ||
| /> | ||
| <PageGap height={pageHeight} /> | ||
| </Fragment> | ||
| ))} | ||
| </PagesWrapper> | ||
| ); | ||
| }; | ||
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| export default StoryContent; | ||
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| const PagesWrapper = styled.div<{ showingIndicator?: boolean }>` | ||
| height: ${({ showingIndicator }) => (showingIndicator ? "calc(100% - 8px)" : "100%")}; | ||
| overflow-y: auto; | ||
| cursor: pointer; | ||
| `; | ||
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| const PageGap = styled.div<{ height?: number }>` | ||
| height: ${({ height }) => (height ? height + "px" : "70vh")}; | ||
| `; |
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