Sources

npm install react-aria-components

"use client";

import type { ComponentProps, ReactNode } from "react";
import { Link, type LinkProps } from "react-aria-components";

const join = (...classes: (string | undefined)[]) => classes.filter(Boolean).join(" ");

const layouts = {
  chips: "flex flex-wrap gap-(--tui-sources-gap)",
  cards: "grid grid-cols-[repeat(auto-fit,minmax(min(100%,var(--tui-sources-card-width)),1fr))] gap-(--tui-sources-gap)",
};

const base =
  "cursor-pointer border-solid border-(length:--tui-sources-border-width) border-(--tui-sources-border) bg-(--tui-sources-bg) text-(--tui-sources-fg) no-underline outline-none transition-colors duration-(--tui-duration) data-focus-visible:[outline:var(--tui-sources-ring-width)_solid_var(--tui-sources-ring)] data-focus-visible:[outline-offset:var(--tui-sources-ring-offset)] data-hovered:bg-(--tui-sources-bg-hover)";

const styles = {
  chip: "inline-flex h-(--tui-sources-height) max-w-full items-center gap-1.5 rounded-(--tui-sources-radius) pr-(--tui-sources-padding-x) pl-[calc(var(--tui-sources-padding-x)_*_0.5)] text-(length:--tui-sources-font-size) leading-none",
  card: "flex h-full flex-col gap-(--tui-sources-card-gap) rounded-(--tui-sources-card-radius) p-(--tui-sources-card-padding) text-(length:--tui-sources-font-size)",
  index: "flex size-(--tui-sources-index-size) shrink-0 items-center justify-center rounded-full bg-(--tui-sources-index-bg) text-[0.85em] leading-none font-medium text-(--tui-sources-index-fg) tabular-nums",
  site: "truncate text-(--tui-sources-muted)",
};

export interface SourcesProps extends ComponentProps<"ol"> {
  /** Chips are one line each. Cards show a title, the site and a line from the page. */
  layout?: keyof typeof layouts;
}

/** The pages a reply drew on, as a numbered list of links. */
export function Sources({ layout = "chips", className, ...props }: SourcesProps) {
  return <ol aria-label="Sources" {...props} className={join("m-0 list-none p-0 font-(family-name:--tui-font)", layouts[layout], className)} />;
}

export interface SourceProps extends Omit<LinkProps, "className" | "children"> {
  /** Match the layout of the Sources it is in. */
  layout?: keyof typeof layouts;
  /** Its number, matching the marker in the reply. */
  index: number;
  title: ReactNode;
  /** Where it is from, e.g. "nytimes.com". */
  site?: ReactNode;
  /** Cards only: a line from the page. */
  snippet?: ReactNode;
  /** Cards only: the site's icon. Without one its first letter stands in. */
  icon?: ReactNode;
  className?: string;
}

export function Source({ layout = "chips", index, title, site, snippet, icon, className, ...props }: SourceProps) {
  if (layout === "cards") {
    return (
      <li className="min-w-0">
        <Link data-slot="source-card" {...props} className={join(base, styles.card, className)}>
          <span className="flex items-center gap-2 leading-none">
            <span aria-hidden className="flex size-(--tui-sources-index-size) shrink-0 items-center justify-center overflow-hidden rounded-[30%] bg-(--tui-sources-index-bg) text-[0.8em] leading-none font-semibold text-(--tui-sources-index-fg) uppercase [&_img]:size-full [&_svg]:size-[70%]">
              {icon ?? (typeof site === "string" ? site.charAt(0) : index)}
            </span>
            {site && <span className={styles.site}>{site}</span>}
            <span aria-hidden className="ml-auto shrink-0 text-(--tui-sources-muted) tabular-nums">
              {index}
            </span>
          </span>
          <span className="line-clamp-2 leading-snug font-medium">{title}</span>
          {snippet && <span className="line-clamp-2 leading-snug text-(--tui-sources-muted)">{snippet}</span>}
        </Link>
      </li>
    );
  }
  return (
    <li className="min-w-0">
      <Link data-slot="source" {...props} className={join(base, styles.chip, className)}>
        <span aria-hidden className={styles.index}>
          {index}
        </span>
        <span className="truncate font-medium">{title}</span>
        {site && <span className={`shrink-0 ${styles.site}`}>{site}</span>}
      </Link>
    </li>
  );
}

:root {
  color-scheme: light;
  --tui-bg: #ffffff;
  --tui-fg: #0a0a0a;
  --tui-muted: #f5f5f5;
  --tui-muted-fg: #737373;
  --tui-border: #e5e5e5;
  --tui-primary: #171717;
  --tui-primary-fg: #fafafa;
  --tui-ring: #a3a3a3;
  --tui-success: #16a34a;
  --tui-warning: #d97706;
  --tui-danger: #dc2626;
  --tui-radius: 8px;
  --tui-border-width: 1px;
  --tui-space: 4px;
  --tui-shadow: none;
  --tui-font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --tui-text: 14px;
  --tui-duration: 150ms;

  /* Sources */
  --tui-sources-gap: calc(var(--tui-space) * 2);
  --tui-sources-index-size: calc(var(--tui-space) * 5);
  --tui-sources-border-width: var(--tui-border-width);
  --tui-sources-font-size: 13px;
  --tui-sources-bg: var(--tui-bg);
  --tui-sources-fg: var(--tui-fg);
  --tui-sources-muted: var(--tui-muted-fg);
  --tui-sources-border: var(--tui-border);
  --tui-sources-index-bg: var(--tui-muted);
  --tui-sources-index-fg: var(--tui-muted-fg);
  --tui-sources-card-width: 170px;
  --tui-sources-card-padding: calc(var(--tui-space) * 3);
  --tui-sources-card-gap: calc(var(--tui-space) * 2);
  --tui-sources-card-radius: calc(var(--tui-radius) * 1.5);
  --tui-sources-height: calc(var(--tui-space) * 7.5);
  --tui-sources-padding-x: calc(var(--tui-space) * 2.5);
  --tui-sources-radius: 999px;
  --tui-sources-bg-hover: var(--tui-muted);
  --tui-sources-ring: var(--tui-ring);
  --tui-sources-ring-width: 2px;
  --tui-sources-ring-offset: 2px;
}

.dark,
[data-theme="dark"] {
  color-scheme: dark;
  --tui-bg: #0a0a0a;
  --tui-fg: #fafafa;
  --tui-muted: #1c1c1c;
  --tui-muted-fg: #a3a3a3;
  --tui-border: #2a2a2a;
  --tui-primary: #fafafa;
  --tui-primary-fg: #171717;
  --tui-ring: #737373;
  --tui-success: #22c55e;
  --tui-warning: #f59e0b;
  --tui-danger: #ef4444;
}