Split layout

import type {ReactNode} from "react";
import {Fill, Easing, interpolate, useBrand, useFrame, useDesignScale, useVideo} from "odori";

export type SplitLayoutProps = {
  title: string;
  detail?: string;
  /** The proof side: code, a product frame, a chart. */
  children?: ReactNode;
  /** Which side the words sit on in a wide format. */
  side?: "left" | "right";
  /** Share of the frame the words take. */
  ratio?: number;
};

/**
 * Explanation beside proof. In a wide format the two sit side by side; in a
 * tall one they stack, because a 9:16 column cannot hold two readable panels.
 */
export const SplitLayout = ({title, detail, children, side = "left", ratio = 0.42}: SplitLayoutProps) => {
  const frame = useFrame();
  const brand = useBrand();
  const scale = useDesignScale();
  const {width, height} = useVideo();
  const stacked = height >= width;
  const words = interpolate(frame, [0, 26], [0, 1], {easing: Easing.standard});
  const proof = interpolate(frame, [14, 44], [0, 1], {easing: Easing.standard});
  const share = `${Math.min(Math.max(ratio, 0.3), 0.6) * 100}%`;

  return (
    <Fill
      style={{
        alignItems: "stretch",
        display: "flex",
        flexDirection: stacked ? "column" : side === "left" ? "row" : "row-reverse",
        gap: 56 * scale,
        padding: `${100 * scale}px ${110 * scale}px`,
      }}
    >
      <div
        style={{
          alignContent: "center",
          display: "grid",
          flex: stacked ? "none" : `0 0 ${share}`,
          gap: 20 * scale,
          opacity: words,
          transform: `translateY(${(1 - words) * 24 * scale}px)`,
        }}
      >
        <div style={{fontSize: 78 * scale, fontWeight: 570, letterSpacing: "-0.045em", lineHeight: 1.06}}>{title}</div>
        {detail ? <div style={{color: brand.colors.muted, fontSize: 32 * scale, lineHeight: 1.45}}>{detail}</div> : null}
      </div>

      <div
        style={{
          background: brand.colors.surface,
          border: `1px solid ${brand.colors.border}`,
          borderRadius: 26 * scale,
          flex: 1,
          opacity: proof,
          overflow: "hidden",
          position: "relative",
          transform: `translateY(${(1 - proof) * 28 * scale}px)`,
        }}
      >
        {children}
      </div>
    </Fill>
  );
};

import {defineComponentPreview} from "odori/preview";
import {SplitLayout} from "./split-layout";

export default defineComponentPreview({
  title: "Split layout",
  category: "Foundation",
  description: "Responsive two-up composition for proof and explanation.",
  component: SplitLayout,
  canvas: {width: 1920, height: 1080, duration: "4s"},
  controls: {
    title: {type: "text", defaultValue: "Story on one side.", maxLength: 48},
    detail: {type: "text", defaultValue: "Proof on the other, in the same frame."},
    side: {type: "select", defaultValue: "left", options: ["left", "right"]},
    ratio: {type: "number", defaultValue: 0.42, min: 0.3, max: 0.6, step: 0.02},
  },
  examples: [
    {name: "Words left", props: {}},
    {name: "Words right", props: {side: "right"}},
  ],
});

import {Scene, Video} from "odori";
import {SplitLayout} from "../components/split-layout/split-layout";

<Video>
  <Scene id="split-layout" duration="4s">
    <SplitLayout
      title="Story on one side."
      detail="Proof on the other, in the same frame."
      side="left"
      ratio={0.42}
    />
  </Scene>
</Video>