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https://github.com/shadcn-ui/ui.git
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18fcf0f766
* feat(@shadcn/react): add message-scroller package Add the @shadcn/react headless primitives package with MessageScroller scroll anchoring, streaming follow, history prepend, and jump-to-message behavior. Includes geometry helpers, use-render utility, and unit, browser, and perf tests. * feat(registry): add chat components Add MessageScroller, Message, Bubble, Attachment, and Marker registry sources for base and radix, style variants, preview-03 chat blocks, and registry index wiring. * feat(v4): integrate chat components into docs site Wire chat components into the v4 app with docs routes, example preview pages, message part renderers, markdown support, registry build updates, and supporting lib utilities. * feat(examples): add chat component demos Add base and radix example demos for MessageScroller, Message, Bubble, Attachment, Marker, scroll-fade, and shimmer. * docs: add chat component documentation Add component and utility docs for the chat component set, update docs navigation, and add the June 2026 chat components changelog entry. * chore: regenerate registry JSON output Rebuild public registry artifacts for all style variants with the new chat components. * chore(release): add @shadcn/react publish and CI pipeline Add Changesets prerelease workflow, browser test job, RELEASING docs, and monorepo wiring for publishing @shadcn/react independently from the shadcn CLI. * docs: fix display of component preview on mobile * fix * fix * docs: add message scroller docs * style: format * fix
104 lines
3.1 KiB
TypeScript
104 lines
3.1 KiB
TypeScript
"use client"
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import { MessageAnimated } from "@/components/message-animated"
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import {
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Card,
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CardContent,
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CardDescription,
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CardFooter,
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CardHeader,
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CardTitle,
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} from "@/styles/base-rhea/ui/card"
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import {
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MessageScroller,
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MessageScrollerButton,
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MessageScrollerContent,
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MessageScrollerProvider,
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MessageScrollerViewport,
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useMessageScrollerScrollable,
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} from "@/styles/base-rhea/ui/message-scroller"
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const messages = Array.from({ length: 12 }, (_, index) => ({
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id: `scrollable-${index + 1}`,
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role: index % 2 === 0 ? "user" : "assistant",
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text:
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index % 2 === 0
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? `Review scroll checkpoint ${index + 1}.`
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: `Checkpoint ${index + 1} is synced. The scrollable hook updates as the viewport moves.\n\nWhen the reader is at the first message, the footer should only point them down. Once they move into the middle of the transcript, it should explain that both directions are available.\n\nAt the latest message, the footer should switch again and only point them back up.`,
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})) satisfies Array<{
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id: string
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role: "user" | "assistant"
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text: string
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}>
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export function MessageScrollerScrollable() {
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return (
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<div className="mx-auto flex w-full max-w-sm flex-col gap-4">
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<Card className="h-140 w-full gap-0 overflow-hidden">
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<CardHeader className="gap-1 border-b">
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<CardTitle>Scroll Status</CardTitle>
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<CardDescription>
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Where the reader can go scroll to based on current scroll position.
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</CardDescription>
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</CardHeader>
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<MessageScrollerProvider defaultScrollPosition="start">
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<CardContent className="flex-1 overflow-hidden p-0">
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<MessageScroller>
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<MessageScrollerViewport>
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<MessageScrollerContent className="gap-4 p-(--card-spacing)">
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<Transcript />
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</MessageScrollerContent>
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</MessageScrollerViewport>
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<MessageScrollerButton />
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</MessageScroller>
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</CardContent>
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<ScrollStateFooter />
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</MessageScrollerProvider>
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</Card>
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<div className="px-0.5 text-center text-xs text-muted-foreground">
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Scroll the transcript to see the footer update.
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</div>
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</div>
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)
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}
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function Transcript() {
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return messages.map((message) => (
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<MessageAnimated
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key={message.id}
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message={message}
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scrollAnchor={message.role === "user"}
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userVariant="muted"
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assistantVariant="ghost"
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/>
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))
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}
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function ScrollStateFooter() {
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const { start, end } = useMessageScrollerScrollable()
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const status = getScrollStatus({ start, end })
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return (
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<CardFooter className="justify-center border-t text-center text-sm text-muted-foreground">
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{status}
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</CardFooter>
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)
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}
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function getScrollStatus({ start, end }: { start: boolean; end: boolean }) {
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if (start && end) {
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return "You can scroll both ways."
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}
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if (end) {
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return "You are at the top. You can only scroll down."
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}
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if (start) {
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return "You are at the bottom. You can only scroll up."
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}
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return "All messages fit in the viewport."
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}
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