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

tldraw infinite canvas SDK (editor).

{
  "version": 3,
  "sources": ["../../../../../src/lib/editor/managers/EdgeScrollManager/EdgeScrollManager.ts"],
  "sourcesContent": ["import { Vec } from '../../../primitives/Vec'\nimport { EASINGS } from '../../../primitives/easings'\nimport { Editor } from '../../Editor'\n\n/** @public */\nexport class EdgeScrollManager {\n\tconstructor(public editor: Editor) {}\n\n\tprivate _isEdgeScrolling = false\n\tprivate _edgeScrollDuration = -1\n\n\t/**\n\t * Update the camera position when the mouse is close to the edge of the screen.\n\t * Run this on every tick when in a state where edge scrolling is enabled.\n\t *\n\t * @public\n\t */\n\tupdateEdgeScrolling(elapsed: number) {\n\t\tconst { editor } = this\n\t\tconst edgeScrollProximityFactor = this.getEdgeScroll()\n\t\tif (edgeScrollProximityFactor.x === 0 && edgeScrollProximityFactor.y === 0) {\n\t\t\tif (this._isEdgeScrolling) {\n\t\t\t\tthis._isEdgeScrolling = false\n\t\t\t\tthis._edgeScrollDuration = 0\n\t\t\t}\n\t\t} else {\n\t\t\tif (!this._isEdgeScrolling) {\n\t\t\t\tthis._isEdgeScrolling = true\n\t\t\t\tthis._edgeScrollDuration = 0\n\t\t\t}\n\t\t\tthis._edgeScrollDuration += elapsed\n\t\t\tif (this._edgeScrollDuration > editor.options.edgeScrollDelay) {\n\t\t\t\tconst eased =\n\t\t\t\t\teditor.options.edgeScrollEaseDuration > 0\n\t\t\t\t\t\t? EASINGS.easeInCubic(\n\t\t\t\t\t\t\t\tMath.min(\n\t\t\t\t\t\t\t\t\t1,\n\t\t\t\t\t\t\t\t\tthis._edgeScrollDuration /\n\t\t\t\t\t\t\t\t\t\t(editor.options.edgeScrollDelay + editor.options.edgeScrollEaseDuration)\n\t\t\t\t\t\t\t\t)\n\t\t\t\t\t\t\t)\n\t\t\t\t\t\t: 1\n\t\t\t\tthis.moveCameraWhenCloseToEdge({\n\t\t\t\t\tx: edgeScrollProximityFactor.x * eased,\n\t\t\t\t\ty: edgeScrollProximityFactor.y * eased,\n\t\t\t\t})\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Helper function to get the scroll proximity factor for a given position.\n\t * @param position - The mouse position on the axis.\n\t * @param dimension - The component dimension on the axis.\n\t * @param isCoarse - Whether the pointer is coarse.\n\t * @param insetStart - Whether the pointer is inset at the start of the axis.\n\t * @param insetEnd - Whether the pointer is inset at the end of the axis.\n\t * @internal\n\t */\n\tprivate getEdgeProximityFactors(\n\t\tposition: number,\n\t\tdimension: number,\n\t\tisCoarse: boolean,\n\t\tinsetStart: boolean,\n\t\tinsetEnd: boolean\n\t) {\n\t\tconst { editor } = this\n\t\tconst dist = editor.options.edgeScrollDistance\n\t\tconst pw = isCoarse ? editor.options.coarsePointerWidth : 0 // pointer width\n\t\tconst pMin = position - pw\n\t\tconst pMax = position + pw\n\t\tconst min = insetStart ? 0 : dist\n\t\tconst max = insetEnd ? dimension : dimension - dist\n\t\tif (pMin < min) {\n\t\t\treturn Math.min(1, (min - pMin) / dist)\n\t\t} else if (pMax > max) {\n\t\t\treturn -Math.min(1, (pMax - max) / dist)\n\t\t}\n\t\treturn 0\n\t}\n\n\tprivate getEdgeScroll() {\n\t\tconst { editor } = this\n\t\tconst {\n\t\t\tinputs: {\n\t\t\t\tcurrentScreenPoint: { x, y },\n\t\t\t},\n\t\t} = editor\n\t\tconst screenBounds = editor.getViewportScreenBounds()\n\n\t\tconst {\n\t\t\tisCoarsePointer,\n\t\t\tinsets: [t, r, b, l],\n\t\t} = editor.getInstanceState()\n\t\tconst proximityFactorX = this.getEdgeProximityFactors(x, screenBounds.w, isCoarsePointer, l, r)\n\t\tconst proximityFactorY = this.getEdgeProximityFactors(y, screenBounds.h, isCoarsePointer, t, b)\n\n\t\treturn {\n\t\t\tx: proximityFactorX,\n\t\t\ty: proximityFactorY,\n\t\t}\n\t}\n\n\t/**\n\t * Moves the camera when the mouse is close to the edge of the screen.\n\t * @public\n\t */\n\tprivate moveCameraWhenCloseToEdge(proximityFactor: { x: number; y: number }) {\n\t\tconst { editor } = this\n\t\tif (!editor.inputs.isDragging || editor.inputs.isPanning || editor.getCameraOptions().isLocked)\n\t\t\treturn\n\n\t\tif (proximityFactor.x === 0 && proximityFactor.y === 0) return\n\n\t\tconst screenBounds = editor.getViewportScreenBounds()\n\n\t\t// Determines how much the speed is affected by the screen size\n\t\tconst screenSizeFactorX = screenBounds.w < 1000 ? 0.612 : 1\n\t\tconst screenSizeFactorY = screenBounds.h < 1000 ? 0.612 : 1\n\n\t\t// Determines the base speed of the scroll\n\t\tconst zoomLevel = editor.getZoomLevel()\n\t\tconst pxSpeed = editor.user.getEdgeScrollSpeed() * editor.options.edgeScrollSpeed\n\t\tconst scrollDeltaX = (pxSpeed * proximityFactor.x * screenSizeFactorX) / zoomLevel\n\t\tconst scrollDeltaY = (pxSpeed * proximityFactor.y * screenSizeFactorY) / zoomLevel\n\n\t\t// update the camera\n\t\tconst { x, y, z } = editor.getCamera()\n\t\teditor.setCamera(new Vec(x + scrollDeltaX, y + scrollDeltaY, z))\n\t}\n}\n"],
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