Timeline

'use client';

import { PauseIcon, PlayIcon, Redo2Icon, ScanSearchIcon, Undo2Icon, VideoIcon } from 'lucide-react';
import { useState } from 'react';
import { Timeline, useTimeline } from '@/components/panelui/timeline';
import { Toolbar } from '@/components/panelui/toolbar';

type Span = { id: string; start: number; end: number };

const CUTS: Span[] = [
  { id: 'c1', start: 4, end: 21 },
  { id: 'c2', start: 24, end: 38 },
  { id: 'c3', start: 52, end: 61 },
  { id: 'c4', start: 77, end: 96 },
  { id: 'c5', start: 99, end: 108 },
  { id: 'c6', start: 121, end: 139 },
];
const ZOOMS: Span[] = [
  { id: 'z1', start: 15, end: 22.5 },
  { id: 'z2', start: 63, end: 70 },
  { id: 'z3', start: 112, end: 121.4 },
];

/** Loudness for speech: phrases with breaths between them. Seeded, so every render draws the same. */
function speech(count: number, seed: number) {
  let state = seed;
  const random = () => (state = (state * 16807) % 2147483647) / 2147483647;
  const peaks: number[] = [];
  for (let at = 0, left = 0, phrase = 1, pause = false; at < count; at++, left--) {
    if (left <= 0) {
      pause = !pause && random() < 0.35;
      left = phrase = pause ? 2 + Math.floor(random() * 4) : 10 + Math.floor(random() * 22);
    }
    const swell = Math.sin(Math.PI * (1 - left / phrase)) * 0.55 + 0.3;
    peaks.push(pause ? 0.04 + random() * 0.05 : Math.min(1, swell * (0.55 + random() * 0.6)));
  }
  return peaks;
}

const PEAKS = speech(260, 7);

/** The play button reads and drives the timeline it sits in. */
function Transport() {
  const { playing, setPlaying } = useTimeline();
  return (
    <Toolbar variant="inline" size="sm" aria-label="Playback">
      <Toolbar.Button label={playing ? 'Pause' : 'Play'} shortcut="Space" onClick={() => setPlaying(!playing)}>
        {playing ? <PauseIcon /> : <PlayIcon />}
      </Toolbar.Button>
      <Toolbar.Separator />
      <Toolbar.Button label="Undo" shortcut="⌘Z">
        <Undo2Icon />
      </Toolbar.Button>
      <Toolbar.Button label="Redo" shortcut="⇧⌘Z" disabled>
        <Redo2Icon />
      </Toolbar.Button>
    </Toolbar>
  );
}

export default function TimelineOverview() {
  const [cuts, setCuts] = useState(CUTS);
  const [zooms, setZooms] = useState(ZOOMS);
  const [take, setTake] = useState({ start: 0, end: 128 });
  const update = (set: typeof setCuts, id: string) => (span: { start: number; end: number }) =>
    set((all) => all.map((each) => (each.id === id ? { ...each, ...span } : each)));

  return (
    <Timeline duration={140} defaultTime={58} defaultZoom={7}>
      <Timeline.Header>
        <Transport />
        <Timeline.Time />
        <Timeline.Zoom />
      </Timeline.Header>
      <Timeline.Viewport>
        <Timeline.Ruler />
        <Timeline.Track size="sm" label="Cuts">
          {cuts.map((cut) => (
            <Timeline.Clip key={cut.id} label="Cut" color="warning" start={cut.start} end={cut.end} onChange={update(setCuts, cut.id)} />
          ))}
        </Timeline.Track>
        <Timeline.Track label="Zooms">
          {zooms.map((zoom) => (
            <Timeline.Clip key={zoom.id} label="Zoom" color="chart-2" start={zoom.start} end={zoom.end} onChange={update(setZooms, zoom.id)}>
              {zoom.end - zoom.start >= 9 ? (
                <Timeline.ClipLabel>
                  <ScanSearchIcon />
                  {(zoom.end - zoom.start).toFixed(1)}s
                </Timeline.ClipLabel>
              ) : null}
            </Timeline.Clip>
          ))}
        </Timeline.Track>
        <Timeline.Track size="lg" label="Recording">
          <Timeline.Clip label="Take 3" color="info" start={take.start} end={take.end} onChange={setTake}>
            <Timeline.Waveform peaks={PEAKS} />
            <Timeline.ClipLabel>
              <VideoIcon />
              Take 3 · {Math.floor((take.end - take.start) / 60)}m {String(Math.round((take.end - take.start) % 60)).padStart(2, '0')}s
            </Timeline.ClipLabel>
          </Timeline.Clip>
        </Timeline.Track>
        <Timeline.Playhead />
      </Timeline.Viewport>
    </Timeline>
  );
}

'use client';

import { useState } from 'react';
import { Timeline, type TimelineColor } from '@/components/panelui/timeline';

/** Loudness for speech: phrases with breaths between them. Seeded, so every render draws the same. */
function speech(count: number, seed: number) {
  let state = seed;
  const random = () => (state = (state * 16807) % 2147483647) / 2147483647;
  const peaks: number[] = [];
  for (let at = 0, left = 0, phrase = 1, pause = false; at < count; at++, left--) {
    if (left <= 0) {
      pause = !pause && random() < 0.35;
      left = phrase = pause ? 2 + Math.floor(random() * 4) : 10 + Math.floor(random() * 22);
    }
    const swell = Math.sin(Math.PI * (1 - left / phrase)) * 0.55 + 0.3;
    peaks.push(pause ? 0.04 + random() * 0.05 : Math.min(1, swell * (0.55 + random() * 0.6)));
  }
  return peaks;
}

const VOICES: { name: string; color: TimelineColor; parts: [number, number][]; seed: number }[] = [
  { name: 'Mariam', color: 'chart-1', parts: [[0, 34], [61, 96], [140, 172]], seed: 11 },
  { name: 'Joel', color: 'chart-2', parts: [[33, 62], [97, 118], [171, 200]], seed: 29 },
  { name: 'Ines', color: 'chart-3', parts: [[118, 141]], seed: 53 },
];

export default function TimelinePodcast() {
  const [voices, setVoices] = useState(VOICES);
  return (
    <Timeline duration={200} defaultZoom={4.2} defaultTime={64}>
      <Timeline.Header>
        <Timeline.Time />
        <Timeline.Zoom />
      </Timeline.Header>
      <Timeline.Viewport>
        <Timeline.Ruler />
        {voices.map((voice, v) => (
          <Timeline.Track key={voice.name} size="md" label={voice.name}>
            {voice.parts.map(([start, end], p) => (
              <Timeline.Clip
                key={p}
                variant="media"
                color={voice.color}
                label={voice.name}
                start={start}
                end={end}
                onChange={(span) =>
                  setVoices((all) =>
                    all.map((each, i) =>
                      i === v ? { ...each, parts: each.parts.map((part, j) => (j === p ? [span.start, span.end] : part)) } : each
                    )
                  )
                }
              >
                <Timeline.Waveform peaks={speech(Math.round((end - start) * 1.6), voice.seed + p)} />
                {p === 0 ? <Timeline.ClipLabel className="absolute start-1">{voice.name}</Timeline.ClipLabel> : null}
              </Timeline.Clip>
            ))}
          </Timeline.Track>
        ))}
        <Timeline.Playhead color="destructive" />
      </Timeline.Viewport>
    </Timeline>
  );
}

'use client';

import { useState } from 'react';
import { Timeline, type TimelineColor } from '@/components/panelui/timeline';

/** Each property of a card's entrance, tweened over its own stretch of time. */
const PROPERTIES: { name: string; color: TimelineColor; start: number; end: number }[] = [
  { name: 'Opacity', color: 'chart-2', start: 0, end: 0.4 },
  { name: 'Lift', color: 'info', start: 0.1, end: 0.9 },
  { name: 'Scale', color: 'destructive', start: 0.25, end: 1.1 },
  { name: 'Blur', color: 'warning', start: 0, end: 0.6 },
];

export default function TimelineMotion() {
  const [tweens, setTweens] = useState(PROPERTIES);
  return (
    <Timeline duration={1.6} defaultZoom={300} minZoom={150} maxZoom={600} defaultTime={0.5}>
      <Timeline.Header>
        <Timeline.Time />
        <Timeline.Zoom />
      </Timeline.Header>
      <Timeline.Viewport>
        <Timeline.Ruler />
        {tweens.map((tween, at) => (
          <Timeline.Track key={tween.name} size="sm" label={tween.name}>
            <Timeline.Clip
              variant="bar"
              label={tween.name}
              color={tween.color}
              start={tween.start}
              end={tween.end}
              onChange={(span) => setTweens((all) => all.map((each, i) => (i === at ? { ...each, ...span } : each)))}
            >
              <Timeline.ClipLabel className="text-[11px]">{tween.name}</Timeline.ClipLabel>
            </Timeline.Clip>
          </Timeline.Track>
        ))}
        <Timeline.Playhead />
      </Timeline.Viewport>
    </Timeline>
  );
}

'use client';

import { CaptionsIcon, MusicIcon } from 'lucide-react';
import { Timeline } from '@/components/panelui/timeline';

export default function TimelineReadOnly() {
  return (
    <Timeline duration={95} defaultZoom={7} defaultTime={31} readOnly>
      <Timeline.Viewport>
        <Timeline.Ruler />
        <Timeline.Track size="sm" label="Captions">
          {[
            [2, 9],
            [10, 18],
            [21, 30],
            [33, 41],
            [44, 57],
            [60, 66],
            [70, 83],
            [86, 93],
          ].map(([start, end]) => (
            <Timeline.Clip key={start} color="chart-3" start={start!} end={end!} label="Caption" />
          ))}
        </Timeline.Track>
        <Timeline.Track label="Music">
          <Timeline.Clip variant="media" color="chart-5" start={0} end={64} label="Opening theme">
            <Timeline.ClipLabel>
              <MusicIcon />
              Opening theme
            </Timeline.ClipLabel>
          </Timeline.Clip>
          <Timeline.Clip variant="media" color="chart-2" start={64} end={95} label="Outro">
            <Timeline.ClipLabel>
              <CaptionsIcon />
              Outro
            </Timeline.ClipLabel>
          </Timeline.Clip>
        </Timeline.Track>
        <Timeline.Playhead />
      </Timeline.Viewport>
    </Timeline>
  );
}