gui-video-clipper/src/lib/components/TransportControls.svelte

<script lang="ts">
  import { session } from '$lib/stores/videoSession.svelte';
  import { markInPoint, markOutPoint } from '$lib/stores/clips.svelte';
  import { formatTime } from '$lib/utils/time';
  import {
    jumpKeyframe,
    runTransportAction,
    seekBy,
    stepFrame,
    togglePlayPause,
    setVolume,
    setMuted,
    getVolume,
    getMuted,
    type TransportKeyAction,
  } from '$lib/transport/playback';

  let hasKeyframes = $derived(session.keyframePositions.length > 0);

  let volume = $state(1);
  let isMuted = $state(false);

  function toggleMute() {
    isMuted = !isMuted;
    setMuted(isMuted);
  }

  function handleVolumeChange(e: Event) {
    const val = parseFloat((e.target as HTMLInputElement).value);
    volume = val;
    if (val > 0 && isMuted) {
      isMuted = false;
    }
    setVolume(val);
    if (val > 0) {
      setMuted(false);
    }
  }

  export function handleKeyAction(action: TransportKeyAction) {
    runTransportAction(action, markInPoint, markOutPoint);
  }
</script>

<div class="transport-controls">
  <div class="buttons">
    <button
      onclick={() => jumpKeyframe(-1)}
      disabled={!hasKeyframes}
      title="Previous keyframe (Shift+,)"
      type="button"
    >
      ◄K
    </button>
    <button onclick={() => seekBy(-5)} title="Seek back 5s (←)" type="button">-5s</button>
    <button onclick={() => seekBy(-1)} title="Seek back 1s (Shift+←)" type="button">-1s</button>
    <button onclick={() => stepFrame(-1)} title="Previous frame (,)" type="button">◄|</button>
    <button onclick={togglePlayPause} title="Play/Pause (Space / K)" type="button">
      {session.isPlaying ? '❚❚' : '▶'}
    </button>
    <button onclick={() => stepFrame(1)} title="Next frame (.)" type="button">|►</button>
    <button onclick={() => seekBy(1)} title="Seek forward 1s (Shift+→)" type="button">+1s</button>
    <button onclick={() => seekBy(5)} title="Seek forward 5s (→)" type="button">+5s</button>
    <button
      onclick={() => jumpKeyframe(1)}
      disabled={!hasKeyframes}
      title="Next keyframe (Shift+.)"
      type="button"
    >
      K►
    </button>
  </div>

  <div class="time-display">
    <span class="current">{formatTime(session.currentTime)}</span>
    <span class="separator">/</span>
    <span class="total">{formatTime(session.duration)}</span>
  </div>

  <div class="volume-controls">
    <button
      class="vol-btn"
      onclick={toggleMute}
      title={isMuted ? 'Unmute' : 'Mute'}
      type="button"
    >
      {#if isMuted || volume === 0}
        🔇
      {:else if volume < 0.5}
        🔉
      {:else}
        🔊
      {/if}
    </button>
    <input
      type="range"
      class="vol-slider"
      min="0"
      max="1"
      step="0.05"
      value={isMuted ? 0 : volume}
      oninput={handleVolumeChange}
    />
  </div>

  <div class="mark-buttons">
    <button
      class="mark-btn"
      onclick={() => markInPoint(session.currentTime)}
      title="Set in-point (I)"
      type="button"
    >
      I
    </button>
    <button
      class="mark-btn"
      onclick={() => markOutPoint(session.currentTime)}
      title="Set out-point (O)"
      type="button"
    >
      O
    </button>
  </div>
</div>

<style>
  .transport-controls {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    gap: 16px;
  }

  .buttons {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
  }

  .buttons button {
    font-size: 13px;
    padding: 4px 8px;
    min-width: 32px;
  }

  .time-display {
    font-family: var(--font-mono);
    font-size: 14px;
  }

  .current {
    color: var(--text-primary);
  }

  .separator {
    color: var(--text-muted);
    margin: 0 4px;
  }

  .total {
    color: var(--text-secondary);
  }

  .volume-controls {
    display: flex;
    align-items: center;
    gap: 4px;
  }

  .vol-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 3px 6px;
    font-size: 14px;
    cursor: pointer;
    line-height: 1;
    color: var(--text-secondary);
  }

  .vol-btn:hover {
    color: var(--text-primary);
  }

  .vol-slider {
    width: 80px;
    height: 4px;
    accent-color: #89b4fa;
    cursor: pointer;
  }

  .mark-buttons {
    margin-left: auto;
    display: flex;
    gap: 4px;
  }

  .mark-btn {
    font-weight: 700;
    font-size: 14px;
    padding: 4px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
  }
</style>