@tldraw/editor/dist-esm/lib/editor/overlays/ShapeIndicatorOverlayUtil.mjs.map

tldraw infinite canvas SDK (editor).

{
  "version": 3,
  "sources": ["../../../../src/lib/editor/overlays/ShapeIndicatorOverlayUtil.ts"],
  "sourcesContent": ["import { computed } from '@tldraw/state'\nimport { createComputedCache } from '@tldraw/store'\nimport { TLShape, TLShapeId } from '@tldraw/tlschema'\nimport type { Editor } from '../Editor'\nimport { OverlayUtil, TLOverlay } from './OverlayUtil'\n\ninterface RelevantInstanceFlags {\n\tisChangingStyle: boolean\n\tisHoveringCanvas: boolean | null\n\tisCoarsePointer: boolean\n}\n\n/** @public */\nexport interface TLShapeIndicatorOverlay extends TLOverlay {\n\tprops: {\n\t\tidsToDisplay: TLShapeId[]\n\t\thintingShapeIds: TLShapeId[]\n\t}\n}\n\nconst indicatorPathCache = createComputedCache(\n\t'shapeIndicatorPath',\n\t(editor: Editor, shape: TLShape) => {\n\t\tconst util = editor.getShapeUtil(shape)\n\t\treturn util.getIndicatorPath(shape)\n\t},\n\t{\n\t\tareRecordsEqual(a, b) {\n\t\t\treturn a.props === b.props\n\t\t},\n\t}\n)\n\n/**\n * Combine every batchable shape indicator into a single page-space `Path2D` and\n * emit one stroke call. Shapes whose indicator needs an evenodd clip (e.g.\n * arrows with labels or complex arrowheads) can't be batched \u2014 they still\n * stroke individually inside a save/restore with `ctx.clip` applied.\n *\n * Shared by {@link ShapeIndicatorOverlayUtil} and any overlay util that paints\n * shape indicators (e.g. collaborator selections).\n *\n * @public\n */\nexport function strokeShapeIndicators(\n\teditor: Editor,\n\tctx: CanvasRenderingContext2D,\n\tshapeIds: TLShapeId[]\n): void {\n\tif (shapeIds.length === 0) return\n\n\tconst batched = new Path2D()\n\n\tfor (const shapeId of shapeIds) {\n\t\tconst shape = editor.getShape(shapeId)\n\t\tif (!shape || shape.isLocked) continue\n\n\t\tconst pageTransform = editor.getShapePageTransform(shape)\n\t\tif (!pageTransform) continue\n\n\t\tconst indicatorPath = indicatorPathCache.get(editor, shape.id)\n\t\tif (!indicatorPath) continue\n\n\t\tif (indicatorPath instanceof Path2D) {\n\t\t\tbatched.addPath(indicatorPath, pageTransform)\n\t\t\tcontinue\n\t\t}\n\n\t\tconst { path, clipPath, additionalPaths } = indicatorPath\n\n\t\tif (!clipPath) {\n\t\t\tbatched.addPath(path, pageTransform)\n\t\t\tif (additionalPaths) {\n\t\t\t\tfor (const p of additionalPaths) batched.addPath(p, pageTransform)\n\t\t\t}\n\t\t\tcontinue\n\t\t}\n\n\t\t// Clipped case: fall back to an individual stroke. Rare (arrows with\n\t\t// labels / complex arrowheads), so the extra save/restore/stroke\n\t\t// pair per such shape isn't worth batching away.\n\t\tctx.save()\n\t\tctx.transform(\n\t\t\tpageTransform.a,\n\t\t\tpageTransform.b,\n\t\t\tpageTransform.c,\n\t\t\tpageTransform.d,\n\t\t\tpageTransform.e,\n\t\t\tpageTransform.f\n\t\t)\n\t\tctx.save()\n\t\tctx.clip(clipPath, 'evenodd')\n\t\tctx.stroke(path)\n\t\tctx.restore()\n\t\tif (additionalPaths) {\n\t\t\tfor (const p of additionalPaths) ctx.stroke(p)\n\t\t}\n\t\tctx.restore()\n\t}\n\n\tctx.stroke(batched)\n}\n\n/**\n * Overlay util for shape indicators \u2014 the selection / hover / hint outlines drawn\n * under the selection foreground. Paints local indicators in the theme's\n * selection color.\n *\n * Remote collaborator selection indicators are drawn by a separate overlay util\n * (e.g. `CollaboratorShapeIndicatorOverlayUtil` from `tldraw`) that runs at a\n * lower z-index so peer selections appear under the local indicators.\n *\n * Non-interactive: contributes no hit-test geometry.\n *\n * @public\n */\nexport class ShapeIndicatorOverlayUtil extends OverlayUtil<TLShapeIndicatorOverlay> {\n\tstatic override type = 'shape_indicator'\n\toverride options = { zIndex: 50, lineWidth: 1.5, hintedLineWidth: 2.5 }\n\n\t// Narrow projection of instance state. Reading the full record would\n\t// re-fire getOverlays on every cursor move / brush update; gating on these\n\t// three booleans means we only re-fire when one of them actually flips.\n\tprivate _instanceFlags$ = computed<RelevantInstanceFlags>(\n\t\t'shape indicator instance flags',\n\t\t() => {\n\t\t\tconst i = this.editor.getInstanceState()\n\t\t\treturn {\n\t\t\t\tisChangingStyle: i.isChangingStyle,\n\t\t\t\tisHoveringCanvas: i.isHoveringCanvas,\n\t\t\t\tisCoarsePointer: i.isCoarsePointer,\n\t\t\t}\n\t\t},\n\t\t{\n\t\t\tisEqual: (a, b) =>\n\t\t\t\ta.isChangingStyle === b.isChangingStyle &&\n\t\t\t\ta.isHoveringCanvas === b.isHoveringCanvas &&\n\t\t\t\ta.isCoarsePointer === b.isCoarsePointer,\n\t\t}\n\t)\n\n\toverride isActive(): boolean {\n\t\treturn true\n\t}\n\n\toverride getOverlays(): TLShapeIndicatorOverlay[] {\n\t\tconst editor = this.editor\n\t\tconst renderingShapeIds = new Set(editor.getRenderingShapes().map((s) => s.id))\n\n\t\t// Local selected / hovered indicators.\n\t\tconst idsToDisplay: TLShapeId[] = []\n\t\tconst { isChangingStyle, isHoveringCanvas, isCoarsePointer } = this._instanceFlags$.get()\n\t\tconst isIdleOrEditing = editor.isInAny('select.idle', 'select.editing_shape')\n\t\tconst isInSelectState = editor.isInAny(\n\t\t\t'select.brushing',\n\t\t\t'select.scribble_brushing',\n\t\t\t'select.pointing_shape',\n\t\t\t'select.pointing_selection',\n\t\t\t'select.pointing_handle'\n\t\t)\n\n\t\tif (!isChangingStyle && (isIdleOrEditing || isInSelectState)) {\n\t\t\tfor (const id of editor.getSelectedShapeIds()) {\n\t\t\t\tif (renderingShapeIds.has(id)) idsToDisplay.push(id)\n\t\t\t}\n\t\t\tif (isIdleOrEditing && isHoveringCanvas && !isCoarsePointer) {\n\t\t\t\tconst hovered = editor.getHoveredShapeId()\n\t\t\t\tif (hovered && renderingShapeIds.has(hovered) && !idsToDisplay.includes(hovered)) {\n\t\t\t\t\tidsToDisplay.push(hovered)\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Hinted shapes (drawn thicker). Already deduped at write time in\n\t\t// `updateHintingShapeIds`, so no need to dedupe again here.\n\t\tconst hintingShapeIds: TLShapeId[] = []\n\t\tfor (const id of editor.getHintingShapeIds()) {\n\t\t\tif (renderingShapeIds.has(id)) hintingShapeIds.push(id)\n\t\t}\n\n\t\tif (idsToDisplay.length === 0 && hintingShapeIds.length === 0) {\n\t\t\treturn []\n\t\t}\n\n\t\treturn [\n\t\t\t{\n\t\t\t\tid: 'shape_indicator',\n\t\t\t\ttype: 'shape_indicator',\n\t\t\t\tprops: { idsToDisplay, hintingShapeIds },\n\t\t\t},\n\t\t]\n\t}\n\n\toverride render(ctx: CanvasRenderingContext2D, overlays: TLShapeIndicatorOverlay[]): void {\n\t\tconst overlay = overlays[0]\n\t\tif (!overlay) return\n\n\t\tconst editor = this.editor\n\t\tconst zoom = editor.getZoomLevel()\n\t\tconst { idsToDisplay, hintingShapeIds } = overlay.props\n\n\t\tctx.lineCap = 'round'\n\t\tctx.lineJoin = 'round'\n\n\t\t// Local selected / hovered indicators \u2014 one stroke call for the whole batch.\n\t\tctx.strokeStyle = editor.getCurrentTheme().colors[editor.getColorMode()].selectionStroke\n\t\tctx.lineWidth = this.options.lineWidth / zoom\n\t\tstrokeShapeIndicators(editor, ctx, idsToDisplay)\n\n\t\t// Hinted shapes \u2014 thicker stroke, one call for the whole batch.\n\t\tif (hintingShapeIds.length > 0) {\n\t\t\tctx.lineWidth = this.options.hintedLineWidth / zoom\n\t\t\tstrokeShapeIndicators(editor, ctx, hintingShapeIds)\n\t\t}\n\t}\n}\n"],
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