@tldraw/editor/dist-esm/lib/editor/managers/TickManager/TickManager.mjs.map

tldraw infinite canvas SDK (editor).

{
  "version": 3,
  "sources": ["../../../../../src/lib/editor/managers/TickManager/TickManager.ts"],
  "sourcesContent": ["import { throttleToNextFrame as _throttleToNextFrame, bind } from '@tldraw/utils'\nimport { Vec } from '../../../primitives/Vec'\nimport { Editor } from '../../Editor'\n\nconst throttleToNextFrame =\n\ttypeof process !== 'undefined' && process.env.NODE_ENV === 'test'\n\t\t? // At test time we should use actual raf and not throttle, because throttle was set up to evaluate immediately during tests, which causes stack overflow\n\t\t\t// for the tick manager since it sets up a raf loop.\n\t\t\tfunction mockThrottle(cb: any) {\n\t\t\t\t// eslint-disable-next-line no-restricted-globals\n\t\t\t\tconst frame = requestAnimationFrame(cb)\n\t\t\t\treturn () => cancelAnimationFrame(frame)\n\t\t\t}\n\t\t: _throttleToNextFrame\n\nexport class TickManager {\n\tconstructor(public editor: Editor) {\n\t\tthis.editor.disposables.add(this.dispose)\n\t\tthis.start()\n\t}\n\n\tcancelRaf?: null | (() => void)\n\tisPaused = true\n\tnow = 0\n\n\tstart() {\n\t\tthis.isPaused = false\n\t\tthis.cancelRaf?.()\n\t\tthis.cancelRaf = throttleToNextFrame(this.tick)\n\t\tthis.now = Date.now()\n\t}\n\n\t@bind\n\ttick() {\n\t\tif (this.isPaused) {\n\t\t\treturn\n\t\t}\n\n\t\tconst now = Date.now()\n\t\tconst elapsed = now - this.now\n\t\tthis.now = now\n\n\t\tthis.updatePointerVelocity(elapsed)\n\t\tthis.editor.emit('frame', elapsed)\n\t\tthis.editor.emit('tick', elapsed)\n\t\tthis.cancelRaf = throttleToNextFrame(this.tick)\n\t}\n\n\t// Clear the listener\n\t@bind\n\tdispose() {\n\t\tthis.isPaused = true\n\n\t\tthis.cancelRaf?.()\n\t}\n\n\tprivate prevPoint = new Vec()\n\n\tupdatePointerVelocity(elapsed: number) {\n\t\tconst {\n\t\t\tprevPoint,\n\t\t\teditor: {\n\t\t\t\tinputs: { currentScreenPoint, pointerVelocity },\n\t\t\t},\n\t\t} = this\n\n\t\tif (elapsed === 0) return\n\n\t\tconst delta = Vec.Sub(currentScreenPoint, prevPoint)\n\t\tthis.prevPoint = currentScreenPoint.clone()\n\n\t\tconst length = delta.len()\n\t\tconst direction = length ? delta.div(length) : new Vec(0, 0)\n\n\t\t// consider adjusting this with an easing rather than a linear interpolation\n\t\tconst next = pointerVelocity.clone().lrp(direction.mul(length / elapsed), 0.5)\n\n\t\t// if the velocity is very small, just set it to 0\n\t\tif (Math.abs(next.x) < 0.01) next.x = 0\n\t\tif (Math.abs(next.y) < 0.01) next.y = 0\n\n\t\tif (!pointerVelocity.equals(next)) {\n\t\t\tthis.editor.inputs.pointerVelocity = next\n\t\t}\n\t}\n}\n"],
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