piano-roll-page.ts
typescript
| 1 | /** |
| 2 | * piano-roll-page.ts — Piano roll viewer page module. |
| 3 | * |
| 4 | * Wires transport controls (play / stop) to the PianoRoll global loaded by |
| 5 | * piano-roll.ts. Falls back to a legacy loader if PianoRoll.init is absent. |
| 6 | * |
| 7 | * Data expected in #page-data: |
| 8 | * { "page": "piano-roll", "repo_id": "...", "ref": "...", "path": "..." } |
| 9 | * |
| 10 | * Registered as: window.MusePages['piano-roll'] |
| 11 | */ |
| 12 | |
| 13 | import { initRepoPage, type RepoPageData } from './repo-page.ts'; |
| 14 | |
| 15 | export interface PianoRollPageData extends RepoPageData { |
| 16 | ref?: string; |
| 17 | path?: string; |
| 18 | midi_url?: string; |
| 19 | } |
| 20 | |
| 21 | function attachTransportControls(): void { |
| 22 | const playBtn = document.getElementById('play-btn'); |
| 23 | const stopBtn = document.getElementById('stop-btn'); |
| 24 | |
| 25 | if (playBtn) { |
| 26 | playBtn.addEventListener('click', () => { |
| 27 | const pr = (window as unknown as { PianoRoll?: { play?: () => void } }).PianoRoll; |
| 28 | if (pr?.play) pr.play(); |
| 29 | }); |
| 30 | } |
| 31 | if (stopBtn) { |
| 32 | stopBtn.addEventListener('click', () => { |
| 33 | const pr = (window as unknown as { PianoRoll?: { stop?: () => void } }).PianoRoll; |
| 34 | if (pr?.stop) pr.stop(); |
| 35 | }); |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | async function legacyLoad(repoId: string): Promise<void> { |
| 40 | const canvas = document.getElementById('piano-canvas') as HTMLCanvasElement | null; |
| 41 | if (!canvas) return; |
| 42 | |
| 43 | const pr = (window as unknown as { PianoRoll?: { init?: unknown } }).PianoRoll; |
| 44 | if (pr?.init) return; // New-style self-init handles it |
| 45 | |
| 46 | const midiUrl = canvas.dataset.midiUrl; |
| 47 | const rollPath = canvas.dataset.path ?? null; |
| 48 | const apiFetch = window.apiFetch; |
| 49 | if (!apiFetch) return; |
| 50 | |
| 51 | try { |
| 52 | const outer = document.getElementById('piano-roll-outer'); |
| 53 | if (rollPath) { |
| 54 | const objData = await apiFetch('/repos/' + encodeURIComponent(repoId) + '/objects?limit=500') as { objects?: Array<{ path: string; objectId: string }> }; |
| 55 | const obj = (objData.objects ?? []).find((o) => o.path === rollPath); |
| 56 | if (obj && typeof window.renderFromObjectId === 'function') { |
| 57 | window.renderFromObjectId(repoId, obj.objectId, outer); |
| 58 | } |
| 59 | } else if (midiUrl) { |
| 60 | if (typeof window.renderFromUrl === 'function') { |
| 61 | window.renderFromUrl(midiUrl, outer); |
| 62 | } |
| 63 | } |
| 64 | } catch (_) { /* silent */ } |
| 65 | } |
| 66 | |
| 67 | export async function initPianoRollPage(data: PianoRollPageData): Promise<void> { |
| 68 | initRepoPage(data); |
| 69 | attachTransportControls(); |
| 70 | if (data.repo_id) await legacyLoad(String(data.repo_id)); |
| 71 | } |