@tldraw/editor/dist-esm/lib/components/default-components/CanvasOverlays.mjs.map

tldraw infinite canvas SDK (editor).

{
  "version": 3,
  "sources": ["../../../../src/lib/components/default-components/CanvasOverlays.tsx"],
  "sourcesContent": ["import { EffectScheduler, computed } from '@tldraw/state'\nimport { memo, useEffect, useRef } from 'react'\nimport { useEditor } from '../../hooks/useEditor'\nimport { Geometry2d } from '../../primitives/geometry/Geometry2d'\nimport { Group2d } from '../../primitives/geometry/Group2d'\nimport { debugFlags } from '../../utils/debug-flags'\n\ninterface RenderInputs {\n\tdpr: number\n\tw: number\n\th: number\n\tcx: number\n\tcy: number\n\tzoom: number\n}\n\n/** @internal @react */\nexport const CanvasOverlays = memo(function CanvasOverlays() {\n\tconst editor = useEditor()\n\tconst canvasRef = useRef<HTMLCanvasElement>(null)\n\n\tuseEffect(() => {\n\t\t// Bundle the primitive scalars the renderer needs into one computed so the\n\t\t// effect only refires on actual visual change. Reading the whole instance\n\t\t// state directly would otherwise wake the renderer on every cursor move,\n\t\t// brush update, etc.\n\n\t\tconst renderInputs$ = computed<RenderInputs>(\n\t\t\t'canvas overlays render inputs',\n\t\t\t() => {\n\t\t\t\tconst instance = editor.getInstanceState()\n\t\t\t\tconst camera = editor.getCamera()\n\t\t\t\treturn {\n\t\t\t\t\tdpr: instance.devicePixelRatio,\n\t\t\t\t\tw: instance.screenBounds.w,\n\t\t\t\t\th: instance.screenBounds.h,\n\t\t\t\t\tcx: camera.x,\n\t\t\t\t\tcy: camera.y,\n\t\t\t\t\tzoom: camera.z,\n\t\t\t\t}\n\t\t\t},\n\t\t\t{\n\t\t\t\tisEqual: (a, b) =>\n\t\t\t\t\ta.dpr === b.dpr &&\n\t\t\t\t\ta.w === b.w &&\n\t\t\t\t\ta.h === b.h &&\n\t\t\t\t\ta.cx === b.cx &&\n\t\t\t\t\ta.cy === b.cy &&\n\t\t\t\t\ta.zoom === b.zoom,\n\t\t\t}\n\t\t)\n\n\t\tconst scheduler = new EffectScheduler('canvas overlays render', () => {\n\t\t\tconst canvas = canvasRef.current\n\t\t\tif (!canvas) return\n\n\t\t\tconst ctx = canvas.getContext('2d')\n\t\t\tif (!ctx) return\n\n\t\t\tconst { dpr, w, h, cx, cy, zoom } = renderInputs$.get()\n\n\t\t\tconst canvasWidth = Math.ceil(w * dpr)\n\t\t\tconst canvasHeight = Math.ceil(h * dpr)\n\n\t\t\tif (canvas.width !== canvasWidth || canvas.height !== canvasHeight) {\n\t\t\t\tcanvas.width = canvasWidth\n\t\t\t\tcanvas.height = canvasHeight\n\t\t\t\tcanvas.style.width = `${w}px`\n\t\t\t\tcanvas.style.height = `${h}px`\n\t\t\t}\n\n\t\t\tctx.setTransform(1, 0, 0, 1, 0, 0)\n\t\t\tctx.clearRect(0, 0, canvas.width, canvas.height)\n\n\t\t\t// One setTransform = DPR scale * zoom scale * camera translate, into page space.\n\t\t\tconst s = dpr * zoom\n\t\t\tctx.setTransform(s, 0, 0, s, s * cx, s * cy)\n\n\t\t\t// Render all active overlay utils in zIndex order (low to high).\n\t\t\tfor (const { util, overlays } of editor.overlays.getActiveOverlayEntries()) {\n\t\t\t\tctx.save()\n\t\t\t\tutil.render(ctx, overlays)\n\t\t\t\tctx.restore()\n\t\t\t}\n\n\t\t\t// Debug: draw all geometry\n\t\t\tif (debugFlags.debugGeometry.get()) {\n\t\t\t\tconst currentPagePoint = editor.inputs.getCurrentPagePoint()\n\n\t\t\t\t// Shape geometries\n\t\t\t\tconst renderingShapes = editor.getRenderingShapes()\n\t\t\t\tfor (const result of renderingShapes) {\n\t\t\t\t\tconst shape = editor.getShape(result.id)\n\t\t\t\t\tif (!shape || shape.type === 'group') continue\n\n\t\t\t\t\tconst geometry = editor.getShapeGeometry(shape)\n\t\t\t\t\tconst pageTransform = editor.getShapePageTransform(shape)\n\t\t\t\t\tif (!pageTransform) continue\n\n\t\t\t\t\tctx.save()\n\t\t\t\t\tconst m = pageTransform\n\t\t\t\t\tctx.transform(m.a, m.b, m.c, m.d, m.e, m.f)\n\n\t\t\t\t\t// Outline\n\t\t\t\t\tctx.strokeStyle = geometry.debugColor ?? 'red'\n\t\t\t\t\tctx.lineWidth = 2 / zoom\n\t\t\t\t\tctx.fillStyle = 'none'\n\t\t\t\t\tdrawGeometryStroke(ctx, geometry)\n\n\t\t\t\t\t// Vertices\n\t\t\t\t\tconst { vertices } = geometry\n\t\t\t\t\tfor (let i = 0; i < vertices.length; i++) {\n\t\t\t\t\t\tconst v = vertices[i]\n\t\t\t\t\t\tconst hue = vertices.length > 1 ? 120 + ((200 - 120) * i) / (vertices.length - 1) : 160\n\t\t\t\t\t\tctx.fillStyle = `hsl(${hue}, 100%, 50%)`\n\t\t\t\t\t\tctx.strokeStyle = 'black'\n\t\t\t\t\t\tctx.lineWidth = 1 / zoom\n\t\t\t\t\t\tctx.beginPath()\n\t\t\t\t\t\tctx.arc(v.x, v.y, 2 / zoom, 0, Math.PI * 2)\n\t\t\t\t\t\tctx.fill()\n\t\t\t\t\t\tctx.stroke()\n\t\t\t\t\t}\n\n\t\t\t\t\t// Nearest point line\n\t\t\t\t\tconst pointInShapeSpace = editor.getPointInShapeSpace(shape, currentPagePoint)\n\t\t\t\t\tconst dist = Math.abs(geometry.distanceToPoint(pointInShapeSpace, true)) * zoom\n\t\t\t\t\tif (dist < 150) {\n\t\t\t\t\t\tconst nearestPoint = geometry.nearestPoint(pointInShapeSpace)\n\t\t\t\t\t\tconst hitInside = geometry.distanceToPoint(pointInShapeSpace, true) < 0\n\t\t\t\t\t\tctx.strokeStyle = hitInside ? 'goldenrod' : 'dodgerblue'\n\t\t\t\t\t\tctx.lineWidth = 2 / zoom\n\t\t\t\t\t\tctx.globalAlpha = 1 - dist / 150\n\t\t\t\t\t\tctx.beginPath()\n\t\t\t\t\t\tctx.moveTo(nearestPoint.x, nearestPoint.y)\n\t\t\t\t\t\tctx.lineTo(pointInShapeSpace.x, pointInShapeSpace.y)\n\t\t\t\t\t\tctx.stroke()\n\t\t\t\t\t\tctx.globalAlpha = 1\n\t\t\t\t\t}\n\n\t\t\t\t\tctx.restore()\n\t\t\t\t}\n\n\t\t\t\t// Overlay hit-test geometries\n\t\t\t\tctx.save()\n\t\t\t\tctx.strokeStyle = 'magenta'\n\t\t\t\tctx.fillStyle = 'rgba(255, 0, 255, 0.1)'\n\t\t\t\tctx.lineWidth = 1 / zoom\n\t\t\t\tfor (const { overlays } of editor.overlays.getActiveOverlayEntries()) {\n\t\t\t\t\tfor (const overlay of overlays) {\n\t\t\t\t\t\tconst geometry = editor.overlays.getOverlayGeometry(overlay)\n\t\t\t\t\t\tif (!geometry) continue\n\t\t\t\t\t\tconst vertices = geometry.vertices\n\t\t\t\t\t\tif (vertices.length < 2) continue\n\t\t\t\t\t\tctx.beginPath()\n\t\t\t\t\t\tctx.moveTo(vertices[0].x, vertices[0].y)\n\t\t\t\t\t\tfor (let i = 1; i < vertices.length; i++) {\n\t\t\t\t\t\t\tctx.lineTo(vertices[i].x, vertices[i].y)\n\t\t\t\t\t\t}\n\t\t\t\t\t\tif (geometry.isClosed) {\n\t\t\t\t\t\t\tctx.closePath()\n\t\t\t\t\t\t\tctx.fill()\n\t\t\t\t\t\t}\n\t\t\t\t\t\tctx.stroke()\n\t\t\t\t\t\tfor (const v of vertices) {\n\t\t\t\t\t\t\tctx.beginPath()\n\t\t\t\t\t\t\tctx.arc(v.x, v.y, 2 / zoom, 0, Math.PI * 2)\n\t\t\t\t\t\t\tctx.fill()\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\tctx.restore()\n\t\t\t}\n\t\t})\n\n\t\tscheduler.attach()\n\t\tscheduler.execute()\n\t\treturn () => scheduler.detach()\n\t}, [editor])\n\n\treturn <canvas ref={canvasRef} className=\"tl-canvas-overlays\" />\n})\n\nfunction drawGeometryStroke(ctx: CanvasRenderingContext2D, geometry: Geometry2d) {\n\tif (geometry instanceof Group2d) {\n\t\tconst prevStroke = ctx.strokeStyle\n\t\tfor (const child of geometry.children) {\n\t\t\tif (child.debugColor) ctx.strokeStyle = child.debugColor\n\t\t\tdrawGeometryStroke(ctx, child)\n\t\t\tctx.strokeStyle = prevStroke\n\t\t}\n\t\tfor (const child of geometry.ignoredChildren) {\n\t\t\tif (child.debugColor) ctx.strokeStyle = child.debugColor\n\t\t\tdrawGeometryStroke(ctx, child)\n\t\t\tctx.strokeStyle = prevStroke\n\t\t}\n\t\treturn\n\t}\n\n\tconst vertices = geometry.vertices\n\tif (vertices.length < 2) return\n\tctx.beginPath()\n\tctx.moveTo(vertices[0].x, vertices[0].y)\n\tfor (let i = 1; i < vertices.length; i++) {\n\t\tctx.lineTo(vertices[i].x, vertices[i].y)\n\t}\n\tif (geometry.isClosed) ctx.closePath()\n\tctx.stroke()\n}\n"],
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  "names": ["CanvasOverlays"]
}