{
  "version": 3,
  "sources": ["../../../src/lib/overlays/CollaboratorHintOverlayUtil.ts"],
  "sourcesContent": ["import { OverlayUtil, TLOverlay, Vec, clamp } from '@tldraw/editor'\n\n/** @public */\nexport interface TLCollaboratorHintOverlay extends TLOverlay {\n\tprops: {\n\t\t/** Clamped point on viewport edge, in page coordinates */\n\t\tx: number\n\t\ty: number\n\t\t/** Rotation angle pointing toward the collaborator's actual cursor */\n\t\trotation: number\n\t\tcolor: string\n\t}\n}\n\n// Lazy-init a Path2D for the hint arrow shape to avoid per-frame path building\nlet _arrowPath: Path2D | null = null\nfunction getArrowPath() {\n\tif (!_arrowPath) {\n\t\t// Matches the path drawn via: M -2,-5 2,0 -2,5 Z\n\t\t_arrowPath = new Path2D('M -2 -5 L 2 0 L -2 5 Z')\n\t}\n\treturn _arrowPath!\n}\n\n/**\n * Overlay util for off-screen collaborator cursor hints.\n * Shows a small directional arrow at the viewport edge pointing toward the collaborator.\n *\n * @public\n */\nexport class CollaboratorHintOverlayUtil extends OverlayUtil<TLCollaboratorHintOverlay> {\n\tstatic override type = 'collaborator_hint'\n\toverride options = { zIndex: 900, lineWidth: 3, viewportPadding: 5 }\n\n\toverride isActive(): boolean {\n\t\tconst viewport = this.editor.getViewportPageBounds()\n\t\tconst zoom = this.editor.getZoomLevel()\n\t\treturn this.editor.getVisibleCollaboratorsOnCurrentPage().some((presence) => {\n\t\t\tconst { cursor } = presence\n\t\t\tif (!cursor) return false\n\t\t\treturn !this._isCursorInViewport(cursor, viewport, zoom)\n\t\t})\n\t}\n\n\toverride getOverlays(): TLCollaboratorHintOverlay[] {\n\t\tconst overlays: TLCollaboratorHintOverlay[] = []\n\t\tconst viewport = this.editor.getViewportPageBounds()\n\t\tconst zoom = this.editor.getZoomLevel()\n\n\t\tfor (const presence of this.editor.getVisibleCollaboratorsOnCurrentPage()) {\n\t\t\tconst { cursor, color, userId } = presence\n\t\t\tif (!cursor) continue\n\t\t\tif (this._isCursorInViewport(cursor, viewport, zoom)) continue\n\n\t\t\tconst pad = this.options.viewportPadding / zoom\n\t\t\tconst x = clamp(cursor.x, viewport.minX + pad, viewport.maxX - pad)\n\t\t\tconst y = clamp(cursor.y, viewport.minY + pad, viewport.maxY - pad)\n\t\t\tconst rotation = Vec.Angle(viewport.center, cursor)\n\n\t\t\toverlays.push({\n\t\t\t\tid: `collaborator_hint:${userId}`,\n\t\t\t\ttype: 'collaborator_hint',\n\t\t\t\tprops: { x, y, rotation, color },\n\t\t\t})\n\t\t}\n\t\treturn overlays\n\t}\n\n\toverride render(ctx: CanvasRenderingContext2D, overlays: TLCollaboratorHintOverlay[]): void {\n\t\tconst zoom = this.editor.getZoomLevel()\n\t\tconst scale = 1 / zoom\n\n\t\tfor (const overlay of overlays) {\n\t\t\tconst { x, y, rotation, color } = overlay.props\n\n\t\t\tctx.save()\n\t\t\tctx.translate(x, y)\n\t\t\tctx.scale(scale, scale)\n\t\t\tctx.rotate(rotation)\n\n\t\t\tconst path = getArrowPath()\n\n\t\t\t// Outline stroke (white background for contrast)\n\t\t\tctx.lineWidth = this.options.lineWidth\n\t\t\t// Canvas doesn't support CSS vars in strokeStyle; use white\n\t\t\tctx.strokeStyle = '#ffffff'\n\t\t\tctx.stroke(path)\n\n\t\t\t// Fill with collaborator color\n\t\t\tctx.fillStyle = color\n\t\t\tctx.fill(path)\n\n\t\t\tctx.restore()\n\t\t}\n\t}\n\n\t/** @internal */\n\tprivate _isCursorInViewport(\n\t\tcursor: { x: number; y: number },\n\t\tviewport: { minX: number; minY: number; maxX: number; maxY: number },\n\t\tzoom: number\n\t): boolean {\n\t\treturn !(\n\t\t\tcursor.x < viewport.minX - 12 / zoom ||\n\t\t\tcursor.y < viewport.minY - 16 / zoom ||\n\t\t\tcursor.x > viewport.maxX - 12 / zoom ||\n\t\t\tcursor.y > viewport.maxY - 16 / zoom\n\t\t)\n\t}\n}\n"],
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