{
  "version": 3,
  "sources": ["../../../src/components/collaborators-overlay/compute-selection.ts"],
  "sourcesContent": ["import { SelectionDirection, SelectionType } from '@wordpress/core-data';\nimport type { ResolvedSelection } from '@wordpress/core-data';\n\nimport {\n\tgetCursorPosition,\n\tgetSelectionRects,\n\tgetFullBlockSelectionRects,\n\tgetBlocksBetween,\n\tisNodeBefore,\n} from './cursor-dom-utils';\nimport type { CursorCoords, SelectionRect } from './cursor-dom-utils';\n\n/** Common parameters passed to cursor/selection computation helpers. */\ninterface OverlayContext {\n\teditorDocument: Document;\n\toverlayRect: DOMRect;\n}\n\n/** Selection rects and the resolved block element for a single-block selection. */\ninterface SingleBlockResult {\n\trects: SelectionRect[];\n\tblockElement: HTMLElement | null;\n}\n\n/** Selection rects and the resolved block elements for a multi-block selection. */\ninterface MultiBlockResult {\n\trects: SelectionRect[];\n\tfirstBlock: HTMLElement | null;\n\tlastBlock: HTMLElement | null;\n\tfirstBlockClientId: string | null;\n}\n\n/** Result of computing visual cursor/selection state for a single user. */\nexport interface SelectionVisual {\n\tcoords?: CursorCoords | null;\n\tselectionRects?: SelectionRect[];\n}\n\n/**\n * Compute cursor coords and optional selection rects for a single user's selection.\n *\n * @param selection      - The selection state from the awareness layer.\n * @param start          - Start position (block clientId + text index).\n * @param end            - End position (only for range selections).\n * @param overlayContext - Shared editor document / overlay references.\n * @return Cursor coordinates and optional selection rectangles.\n */\nexport function computeSelectionVisual(\n\tselection: any,\n\tstart: ResolvedSelection,\n\tend: ResolvedSelection | undefined,\n\toverlayContext: OverlayContext\n): SelectionVisual {\n\tif (\n\t\tselection.type === SelectionType.None ||\n\t\tselection.type === SelectionType.WholeBlock\n\t) {\n\t\treturn {};\n\t}\n\n\tif ( selection.type === SelectionType.Cursor ) {\n\t\treturn computeCursorOnly( start, overlayContext );\n\t}\n\n\t// SelectionInOneBlock or SelectionInMultipleBlocks.\n\tif ( ! end ) {\n\t\treturn {};\n\t}\n\treturn computeTextSelection( selection, start, end, overlayContext );\n}\n\n/**\n * Compute cursor coordinates for a simple cursor (no highlighted text).\n *\n * @param start          - Cursor position (block clientId + text index).\n * @param overlayContext - Shared editor document / overlay references.\n * @return Cursor coordinates.\n */\nfunction computeCursorOnly(\n\tstart: ResolvedSelection,\n\toverlayContext: OverlayContext\n): SelectionVisual {\n\tif ( ! start.localClientId ) {\n\t\treturn {};\n\t}\n\tconst blockElement =\n\t\toverlayContext.editorDocument.querySelector< HTMLElement >(\n\t\t\t`[data-block=\"${ start.localClientId }\"]`\n\t\t);\n\treturn {\n\t\tcoords: getCursorPosition(\n\t\t\tstart.richTextOffset,\n\t\t\tblockElement,\n\t\t\toverlayContext.editorDocument,\n\t\t\toverlayContext.overlayRect\n\t\t),\n\t};\n}\n\n/**\n * Compute cursor coordinates and selection highlight rects for a text selection\n * (single-block or multi-block).\n *\n * @param selection      - The selection state.\n * @param start          - Start position (block clientId + text index).\n * @param end            - End position (block clientId + text index).\n * @param overlayContext - Shared editor document / overlay references.\n * @return Cursor coordinates and optional selection rectangles.\n */\nfunction computeTextSelection(\n\tselection: any,\n\tstart: ResolvedSelection,\n\tend: ResolvedSelection,\n\toverlayContext: OverlayContext\n): SelectionVisual {\n\tif (\n\t\t! start.localClientId ||\n\t\t! end.localClientId ||\n\t\tstart.richTextOffset === null ||\n\t\tend.richTextOffset === null\n\t) {\n\t\treturn {};\n\t}\n\n\tconst isReverse =\n\t\tselection.selectionDirection === SelectionDirection.Backward;\n\tconst activeEnd = isReverse ? start : end;\n\n\tlet allRects: SelectionRect[];\n\tlet activeEndBlock: HTMLElement | null = null;\n\n\tif ( selection.type === SelectionType.SelectionInOneBlock ) {\n\t\tconst result = computeSingleBlockRects( start, end, overlayContext );\n\t\tallRects = result.rects;\n\t\t// Single block: start and end share the same block element.\n\t\tactiveEndBlock = result.blockElement;\n\t} else {\n\t\tconst result = computeMultiBlockRects( start, end, overlayContext );\n\t\tallRects = result.rects;\n\t\t// Pick the block element that matches the active end.\n\t\tactiveEndBlock =\n\t\t\tactiveEnd.localClientId === result.firstBlockClientId\n\t\t\t\t? result.firstBlock\n\t\t\t\t: result.lastBlock;\n\t}\n\n\tif ( allRects.length > 0 ) {\n\t\treturn {\n\t\t\tcoords: getCursorPosition(\n\t\t\t\tactiveEnd.richTextOffset,\n\t\t\t\tactiveEndBlock,\n\t\t\t\toverlayContext.editorDocument,\n\t\t\t\toverlayContext.overlayRect\n\t\t\t),\n\t\t\tselectionRects: allRects,\n\t\t};\n\t}\n\n\t// Fallback: cursor at start position only.\n\tconst startBlock =\n\t\toverlayContext.editorDocument.querySelector< HTMLElement >(\n\t\t\t`[data-block=\"${ start.localClientId }\"]`\n\t\t);\n\n\treturn {\n\t\tcoords: getCursorPosition(\n\t\t\tstart.richTextOffset,\n\t\t\tstartBlock,\n\t\t\toverlayContext.editorDocument,\n\t\t\toverlayContext.overlayRect\n\t\t),\n\t};\n}\n\n/**\n * Compute selection rects for a selection within a single block.\n *\n * @param start          - Start position (block clientId + text index).\n * @param end            - End position (block clientId + text index).\n * @param overlayContext - Shared editor document / overlay references.\n * @return Array of selection rectangles.\n */\nfunction computeSingleBlockRects(\n\tstart: ResolvedSelection,\n\tend: ResolvedSelection,\n\toverlayContext: OverlayContext\n): SingleBlockResult {\n\tconst blockElement =\n\t\toverlayContext.editorDocument.querySelector< HTMLElement >(\n\t\t\t`[data-block=\"${ start.localClientId }\"]`\n\t\t);\n\tif (\n\t\t! blockElement ||\n\t\tstart.richTextOffset === null ||\n\t\tend.richTextOffset === null\n\t) {\n\t\treturn { rects: [], blockElement: null };\n\t}\n\treturn {\n\t\trects:\n\t\t\tgetSelectionRects(\n\t\t\t\tblockElement,\n\t\t\t\tstart.richTextOffset,\n\t\t\t\tend.richTextOffset,\n\t\t\t\toverlayContext.editorDocument,\n\t\t\t\toverlayContext.overlayRect\n\t\t\t) ?? [],\n\t\tblockElement,\n\t};\n}\n\n/**\n * Compute selection rects for a selection spanning multiple blocks.\n *\n * Normalizes to document order \u2014 for backward selections the block editor\n * reports start after end.\n *\n * @param start          - Start position (block clientId + text index).\n * @param end            - End position (block clientId + text index).\n * @param overlayContext - Shared editor document / overlay references.\n * @return Array of selection rectangles.\n */\nfunction computeMultiBlockRects(\n\tstart: ResolvedSelection,\n\tend: ResolvedSelection,\n\toverlayContext: OverlayContext\n): MultiBlockResult {\n\tlet docFirst = start;\n\tlet docLast = end;\n\tlet firstBlock = overlayContext.editorDocument.querySelector< HTMLElement >(\n\t\t`[data-block=\"${ docFirst.localClientId }\"]`\n\t);\n\tlet lastBlock = overlayContext.editorDocument.querySelector< HTMLElement >(\n\t\t`[data-block=\"${ docLast.localClientId }\"]`\n\t);\n\n\t// Swap to document order if needed.\n\tif ( firstBlock && lastBlock && isNodeBefore( lastBlock, firstBlock ) ) {\n\t\tdocFirst = end;\n\t\tdocLast = start;\n\t\t[ firstBlock, lastBlock ] = [ lastBlock, firstBlock ];\n\t}\n\n\tif (\n\t\t! firstBlock ||\n\t\t! lastBlock ||\n\t\tdocFirst.richTextOffset === null ||\n\t\tdocLast.richTextOffset === null ||\n\t\t! docFirst.localClientId ||\n\t\t! docLast.localClientId\n\t) {\n\t\treturn {\n\t\t\trects: [],\n\t\t\tfirstBlock: null,\n\t\t\tlastBlock: null,\n\t\t\tfirstBlockClientId: null,\n\t\t};\n\t}\n\n\tconst allRects: SelectionRect[] = [];\n\n\t// First block: from start offset to end of block.\n\tconst startRects = getSelectionRects(\n\t\tfirstBlock,\n\t\tdocFirst.richTextOffset,\n\t\tNumber.MAX_SAFE_INTEGER,\n\t\toverlayContext.editorDocument,\n\t\toverlayContext.overlayRect\n\t);\n\tif ( startRects ) {\n\t\tallRects.push( ...startRects );\n\t}\n\n\t// Intermediate blocks: full content.\n\tconst intermediateBlocks = getBlocksBetween(\n\t\tdocFirst.localClientId,\n\t\tdocLast.localClientId,\n\t\toverlayContext.editorDocument\n\t);\n\tfor ( const intermediateBlock of intermediateBlocks ) {\n\t\tconst rects = getFullBlockSelectionRects(\n\t\t\tintermediateBlock,\n\t\t\toverlayContext.editorDocument,\n\t\t\toverlayContext.overlayRect\n\t\t);\n\t\tallRects.push( ...rects );\n\t}\n\n\t// Last block: from 0 to end offset.\n\tconst endRects = getSelectionRects(\n\t\tlastBlock,\n\t\t0,\n\t\tdocLast.richTextOffset,\n\t\toverlayContext.editorDocument,\n\t\toverlayContext.overlayRect\n\t);\n\tif ( endRects ) {\n\t\tallRects.push( ...endRects );\n\t}\n\n\treturn {\n\t\trects: allRects,\n\t\tfirstBlock,\n\t\tlastBlock,\n\t\tfirstBlockClientId: docFirst.localClientId,\n\t};\n}\n"],
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