tldraw/dist-esm/lib/tools/selection-logic/updateHoveredShapeId.mjs.map

A tiny little drawing editor.

{
  "version": 3,
  "sources": ["../../../../src/lib/tools/selection-logic/updateHoveredShapeId.ts"],
  "sourcesContent": ["import { Editor, TLShape, TLShapeId, throttle } from '@tldraw/editor'\n\n/*\nPerf optimization: Skip hover updates while panning.\n\nHit-testing shapes is expensive in large documents. When panning, we don't need\ncontinuous hover updates - we just need to resume when the camera stops.\n\nThe logic:\n1. Camera idle \u2192 update hover normally, unlock\n2. Camera moving + locked \u2192 skip entirely (no hit-testing)\n3. Camera moving + no current hover \u2192 lock immediately\n4. Camera moving + same shape \u2192 keep current hover (no change needed)\n5. Camera moving + different shape \u2192 clear hover and lock\n\nThis means: when you start panning over a shape, it stays hovered until\nyour cursor moves off it, then hover clears and we stop hit-testing until\nthe camera stops.\n*/\n\n// Track per-editor state for hover updates during camera movement\nconst hoverLockedEditors = new WeakMap<Editor, boolean>()\n\nfunction getShapeToHover(editor: Editor): TLShapeId | null {\n\tconst hitShape = editor.getShapeAtPoint(editor.inputs.getCurrentPagePoint(), {\n\t\thitInside: false,\n\t\thitLabels: false,\n\t\tmargin: editor.options.hitTestMargin / editor.getZoomLevel(),\n\t\trenderingOnly: true,\n\t})\n\n\tif (!hitShape) return null\n\n\tlet shapeToHover: TLShape | undefined = undefined\n\n\tconst outermostShape = editor.getOutermostSelectableShape(hitShape)\n\n\tif (outermostShape === hitShape) {\n\t\tshapeToHover = hitShape\n\t} else {\n\t\tif (\n\t\t\toutermostShape.id === editor.getFocusedGroupId() ||\n\t\t\teditor.getSelectedShapeIds().includes(outermostShape.id)\n\t\t) {\n\t\t\tshapeToHover = hitShape\n\t\t} else {\n\t\t\tshapeToHover = outermostShape\n\t\t}\n\t}\n\n\treturn shapeToHover.id\n}\n\nfunction _updateHoveredShapeId(editor: Editor) {\n\tconst cameraMoving = editor.getCameraState() === 'moving'\n\n\tif (!cameraMoving) {\n\t\thoverLockedEditors.set(editor, false)\n\t\tconst nextHoveredId = getShapeToHover(editor)\n\t\treturn editor.setHoveredShape(nextHoveredId)\n\t}\n\n\tif (hoverLockedEditors.get(editor)) {\n\t\treturn undefined\n\t}\n\n\tconst currentHoveredId = editor.getHoveredShapeId()\n\n\tif (!currentHoveredId) {\n\t\thoverLockedEditors.set(editor, true)\n\t\treturn undefined\n\t}\n\n\tconst nextHoveredId = getShapeToHover(editor)\n\tif (nextHoveredId === currentHoveredId) {\n\t\treturn undefined\n\t}\n\n\teditor.setHoveredShape(null)\n\thoverLockedEditors.set(editor, true)\n\treturn undefined\n}\n\n/** @internal */\nexport const updateHoveredShapeId = throttle(\n\t_updateHoveredShapeId,\n\tprocess.env.NODE_ENV === 'test' ? 0 : 32\n)\n"],
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  "names": ["nextHoveredId"]
}