@wordpress/core-data/build-module/utils/crdt-user-selections.mjs.map

Access to and manipulation of core WordPress entities.

{
  "version": 3,
  "sources": ["../../src/utils/crdt-user-selections.ts"],
  "sourcesContent": ["import { select } from '@wordpress/data';\nimport { Y } from '@wordpress/sync';\n// @ts-expect-error `@wordpress/block-editor` does not expose type declarations for its entry point.\nimport { store as blockEditorStore } from '@wordpress/block-editor';\nimport { CRDT_RECORD_MAP_KEY } from '../sync';\nimport type { YPostRecord } from './crdt';\nimport type { YBlock, YBlocks } from './crdt-blocks';\nimport {\n\tasRichTextOffset,\n\tgetRootMap,\n\tgetYTextByAttributeKey,\n\trichTextOffsetToHtmlIndex,\n} from './crdt-utils';\nimport type {\n\tAbsoluteBlockIndexPath,\n\tWPBlockSelection,\n\tSelectionState,\n\tSelectionNone,\n\tSelectionCursor,\n\tSelectionInOneBlock,\n\tSelectionInMultipleBlocks,\n\tSelectionWholeBlock,\n\tCursorPosition,\n\tSelectionEndpoint,\n} from '../types';\n\n/**\n * The type of selection.\n */\nexport enum SelectionType {\n\tNone = 'none',\n\tCursor = 'cursor',\n\tSelectionInOneBlock = 'selection-in-one-block',\n\tSelectionInMultipleBlocks = 'selection-in-multiple-blocks',\n\tWholeBlock = 'whole-block',\n}\n\n/**\n * The direction of a text selection, indicating where the caret sits.\n */\nexport enum SelectionDirection {\n\t/** The caret is at the end of the selection (default / left-to-right). */\n\tForward = 'f',\n\t/** The caret is at the start of the selection (right-to-left). */\n\tBackward = 'b',\n}\n\n/**\n * Converts WordPress block editor selection to a SelectionState.\n *\n * Uses getBlockPathForLocalClientId to locate blocks in the Yjs document by\n * their tree position (index path) rather than clientId, since clientIds may\n * differ between the block-editor store and the Yjs document (e.g. in \"Show\n * Template\" mode).\n *\n * @param selectionStart             - The start position of the selection\n * @param selectionEnd               - The end position of the selection\n * @param yDoc                       - The Yjs document\n * @param options                    - Optional parameters\n * @param options.selectionDirection - The direction of the selection (forward or backward)\n * @return The SelectionState\n */\nexport function getSelectionState(\n\tselectionStart: WPBlockSelection,\n\tselectionEnd: WPBlockSelection,\n\tyDoc: Y.Doc,\n\toptions?: { selectionDirection?: SelectionDirection }\n): SelectionState {\n\tconst { selectionDirection } = options ?? {};\n\tconst ymap = getRootMap< YPostRecord >( yDoc, CRDT_RECORD_MAP_KEY );\n\tconst yBlocks = ymap.get( 'blocks' );\n\n\tconst isSelectionEmpty = Object.keys( selectionStart ).length === 0;\n\tconst noSelection: SelectionNone = {\n\t\ttype: SelectionType.None,\n\t};\n\n\tif ( isSelectionEmpty || ! yBlocks ) {\n\t\t// Case 1: No selection, or no blocks in the document.\n\t\treturn noSelection;\n\t}\n\n\t// When the page initially loads, selectionStart can contain an empty object `{}`.\n\tconst isSelectionInOneBlock =\n\t\tselectionStart.clientId === selectionEnd.clientId;\n\tconst isCursorOnly =\n\t\tisSelectionInOneBlock && selectionStart.offset === selectionEnd.offset;\n\tconst isSelectionAWholeBlock =\n\t\tisSelectionInOneBlock &&\n\t\tselectionStart.offset === undefined &&\n\t\tselectionEnd.offset === undefined;\n\n\tif ( isSelectionAWholeBlock ) {\n\t\t// Case 2: A whole block is selected.\n\t\tconst path = getBlockPathForLocalClientId( selectionStart.clientId );\n\t\tconst blockPosition = path\n\t\t\t? createRelativePositionForBlockPath( path, yBlocks )\n\t\t\t: null;\n\n\t\tif ( ! blockPosition ) {\n\t\t\treturn noSelection;\n\t\t}\n\n\t\treturn {\n\t\t\ttype: SelectionType.WholeBlock,\n\t\t\tblockPosition,\n\t\t};\n\t} else if ( isCursorOnly ) {\n\t\t// Case 3: Cursor only, no text selected\n\t\tconst cursorPosition = getCursorPosition( selectionStart, yBlocks );\n\n\t\tif ( ! cursorPosition ) {\n\t\t\t// If we can't find the cursor position in block text, treat it as a non-selection.\n\t\t\treturn noSelection;\n\t\t}\n\n\t\treturn {\n\t\t\ttype: SelectionType.Cursor,\n\t\t\tcursorPosition,\n\t\t};\n\t} else if ( isSelectionInOneBlock ) {\n\t\t// Case 4: Selection in a single block\n\t\tconst cursorStartPosition = getCursorPosition(\n\t\t\tselectionStart,\n\t\t\tyBlocks\n\t\t);\n\t\tconst cursorEndPosition = getCursorPosition( selectionEnd, yBlocks );\n\n\t\tif ( ! cursorStartPosition || ! cursorEndPosition ) {\n\t\t\t// If we can't find the cursor positions in block text, treat it as a non-selection.\n\t\t\treturn noSelection;\n\t\t}\n\n\t\treturn {\n\t\t\ttype: SelectionType.SelectionInOneBlock,\n\t\t\tcursorStartPosition,\n\t\t\tcursorEndPosition,\n\t\t\tselectionDirection,\n\t\t};\n\t}\n\n\t// Case 5: Selection in multiple blocks.\n\t// Each endpoint is resolved independently — text fields get a CursorEndpoint\n\t// (character-level anchor), everything else gets a WholeBlockEndpoint\n\t// (block-slot anchor). Mixed combinations across block types are valid.\n\tconst startEndpoint = getSelectionEndpoint( selectionStart, yBlocks );\n\tconst endEndpoint = getSelectionEndpoint( selectionEnd, yBlocks );\n\tif ( ! startEndpoint || ! endEndpoint ) {\n\t\treturn noSelection;\n\t}\n\n\treturn {\n\t\ttype: SelectionType.SelectionInMultipleBlocks,\n\t\tstartEndpoint,\n\t\tendEndpoint,\n\t\tselectionDirection,\n\t};\n}\n\n/**\n * Get the cursor position from a selection.\n *\n * @param selection - The selection.\n * @param blocks    - The blocks to search through.\n * @return The cursor position, or null if not found.\n */\nfunction getCursorPosition(\n\tselection: WPBlockSelection,\n\tblocks: YBlocks\n): CursorPosition | null {\n\tconst path = getBlockPathForLocalClientId( selection.clientId );\n\tconst block = path ? findBlockByPath( path, blocks ) : null;\n\tif (\n\t\t! block ||\n\t\t! selection.attributeKey ||\n\t\tundefined === selection.offset\n\t) {\n\t\treturn null;\n\t}\n\n\tconst attributes = block.get( 'attributes' );\n\tconst currentYText = attributes\n\t\t? getYTextByAttributeKey( attributes, selection.attributeKey )\n\t\t: null;\n\n\t// If the attribute is not a Y.Text, return null.\n\tif ( ! ( currentYText instanceof Y.Text ) ) {\n\t\treturn null;\n\t}\n\n\tconst relativePosition = Y.createRelativePositionFromTypeIndex(\n\t\tcurrentYText,\n\t\trichTextOffsetToHtmlIndex(\n\t\t\tcurrentYText.toString(),\n\t\t\tasRichTextOffset( selection.offset )\n\t\t)\n\t);\n\n\treturn {\n\t\trelativePosition,\n\t\tabsoluteOffset: selection.offset,\n\t\tattributeKey: selection.attributeKey,\n\t};\n}\n\n/**\n * Build a SelectionEndpoint for one side of a multi-block selection.\n *\n * WHY two shapes: Yjs relative positions must be anchored to the right node\n * type. If the block has a RichText field with a known character offset, we\n * anchor to a Y.Text position (CursorEndpoint) so the cursor survives\n * concurrent text edits. If there is no text offset (whole-block selection,\n * or a block type with no RichText), we anchor to the block's index slot in\n * its parent Y.Array (WholeBlockEndpoint) so it survives block insertions and\n * deletions above or below it.\n *\n * @param selection - The WPBlockSelection for this side.\n * @param blocks    - The root-level Yjs blocks array.\n * @return A SelectionEndpoint, or null if the block cannot be located in Yjs.\n */\nfunction getSelectionEndpoint(\n\tselection: WPBlockSelection,\n\tblocks: YBlocks\n): SelectionEndpoint | null {\n\tconst cursorPosition = getCursorPosition( selection, blocks );\n\tif ( cursorPosition ) {\n\t\treturn { type: SelectionType.Cursor, cursorPosition };\n\t}\n\n\t// No character offset available — anchor to the block's slot in its\n\t// parent Y.Array instead.\n\tconst path = getBlockPathForLocalClientId( selection.clientId );\n\tconst blockPosition = path\n\t\t? createRelativePositionForBlockPath( path, blocks )\n\t\t: null;\n\tif ( blockPosition ) {\n\t\treturn { type: SelectionType.WholeBlock, blockPosition };\n\t}\n\treturn null;\n}\n\n/**\n * Resolves a local block-editor clientId to its index path relative to the\n * post content blocks. This allows finding the corresponding block in the Yjs\n * document even when clientIds differ (e.g. in \"Show Template\" mode where\n * blocks are cloned).\n *\n * In template mode, the block tree includes template parts and wrapper blocks\n * around a core/post-content block. The Yjs document only contains the post\n * content blocks, so we stop the upward walk when the parent is\n * core/post-content (its inner blocks correspond to the Yjs root blocks).\n *\n * @param clientId - The local block-editor clientId to resolve.\n * @return The index path from root, or null if not resolvable.\n */\nexport function getBlockPathForLocalClientId(\n\tclientId: string\n): AbsoluteBlockIndexPath | null {\n\tconst { getBlockIndex, getBlockRootClientId, getBlockName } =\n\t\tselect( blockEditorStore );\n\n\tconst path: AbsoluteBlockIndexPath = [];\n\tlet current: string | null = clientId;\n\twhile ( current ) {\n\t\tconst index = getBlockIndex( current );\n\t\tif ( index === -1 ) {\n\t\t\treturn null;\n\t\t}\n\t\tpath.unshift( index );\n\t\tconst parent = getBlockRootClientId( current );\n\t\tif ( ! parent ) {\n\t\t\tbreak;\n\t\t}\n\t\t// If the parent is core/post-content, stop here — the Yjs doc\n\t\t// root blocks correspond to post-content's inner blocks.\n\t\tconst parentName = getBlockName( parent );\n\t\tif ( parentName === 'core/post-content' ) {\n\t\t\tbreak;\n\t\t}\n\t\tcurrent = parent;\n\t}\n\treturn path.length > 0 ? path : null;\n}\n\n/**\n * Find a block by navigating a tree index path in the Yjs block hierarchy.\n *\n * @param path   - The index path, e.g. [0, 1] for blocks[0].innerBlocks[1].\n * @param blocks - The root-level Yjs blocks array.\n * @return The block Y.Map if found, null otherwise.\n */\nfunction findBlockByPath(\n\tpath: AbsoluteBlockIndexPath,\n\tblocks: YBlocks\n): YBlock | null {\n\tlet currentBlocks = blocks;\n\tfor ( let i = 0; i < path.length; i++ ) {\n\t\tif ( path[ i ] >= currentBlocks.length ) {\n\t\t\treturn null;\n\t\t}\n\t\tconst block = currentBlocks.get( path[ i ] );\n\t\tif ( ! block ) {\n\t\t\treturn null;\n\t\t}\n\t\tif ( i === path.length - 1 ) {\n\t\t\treturn block;\n\t\t}\n\t\tcurrentBlocks =\n\t\t\tblock.get( 'innerBlocks' ) ?? ( new Y.Array() as YBlocks );\n\t}\n\treturn null;\n}\n\n/**\n * Create a Y.RelativePosition for a block by navigating a tree index path.\n *\n * @param path   - The index path, e.g. [0, 1] for blocks[0].innerBlocks[1].\n * @param blocks - The root-level Yjs blocks array.\n * @return A Y.RelativePosition for the block, or null if the path is invalid.\n */\nfunction createRelativePositionForBlockPath(\n\tpath: AbsoluteBlockIndexPath,\n\tblocks: YBlocks\n): Y.RelativePosition | null {\n\tlet currentBlocks = blocks;\n\tfor ( let i = 0; i < path.length; i++ ) {\n\t\tif ( path[ i ] >= currentBlocks.length ) {\n\t\t\treturn null;\n\t\t}\n\t\tif ( i === path.length - 1 ) {\n\t\t\treturn Y.createRelativePositionFromTypeIndex(\n\t\t\t\tcurrentBlocks,\n\t\t\t\tpath[ i ]\n\t\t\t);\n\t\t}\n\t\tconst block = currentBlocks.get( path[ i ] );\n\t\tcurrentBlocks =\n\t\t\tblock?.get( 'innerBlocks' ) ?? ( new Y.Array() as YBlocks );\n\t}\n\treturn null;\n}\n\n/**\n * Check if two selection states are equal.\n *\n * @param selection1 - The first selection state.\n * @param selection2 - The second selection state.\n * @return True if the selection states are equal, false otherwise.\n */\nexport function areSelectionsStatesEqual(\n\tselection1: SelectionState,\n\tselection2: SelectionState\n): boolean {\n\tif ( selection1.type !== selection2.type ) {\n\t\treturn false;\n\t}\n\n\tswitch ( selection1.type ) {\n\t\tcase SelectionType.None:\n\t\t\treturn true;\n\n\t\tcase SelectionType.Cursor:\n\t\t\treturn areCursorPositionsEqual(\n\t\t\t\tselection1.cursorPosition,\n\t\t\t\t( selection2 as SelectionCursor ).cursorPosition\n\t\t\t);\n\n\t\tcase SelectionType.SelectionInOneBlock:\n\t\t\treturn (\n\t\t\t\tareCursorPositionsEqual(\n\t\t\t\t\tselection1.cursorStartPosition,\n\t\t\t\t\t( selection2 as SelectionInOneBlock ).cursorStartPosition\n\t\t\t\t) &&\n\t\t\t\tareCursorPositionsEqual(\n\t\t\t\t\tselection1.cursorEndPosition,\n\t\t\t\t\t( selection2 as SelectionInOneBlock ).cursorEndPosition\n\t\t\t\t) &&\n\t\t\t\tselection1.selectionDirection ===\n\t\t\t\t\t( selection2 as SelectionInOneBlock ).selectionDirection\n\t\t\t);\n\n\t\tcase SelectionType.SelectionInMultipleBlocks:\n\t\t\treturn (\n\t\t\t\tareEndpointsEqual(\n\t\t\t\t\tselection1.startEndpoint,\n\t\t\t\t\t( selection2 as SelectionInMultipleBlocks ).startEndpoint\n\t\t\t\t) &&\n\t\t\t\tareEndpointsEqual(\n\t\t\t\t\tselection1.endEndpoint,\n\t\t\t\t\t( selection2 as SelectionInMultipleBlocks ).endEndpoint\n\t\t\t\t) &&\n\t\t\t\tselection1.selectionDirection ===\n\t\t\t\t\t( selection2 as SelectionInMultipleBlocks )\n\t\t\t\t\t\t.selectionDirection\n\t\t\t);\n\t\tcase SelectionType.WholeBlock:\n\t\t\treturn Y.compareRelativePositions(\n\t\t\t\tselection1.blockPosition,\n\t\t\t\t( selection2 as SelectionWholeBlock ).blockPosition\n\t\t\t);\n\n\t\tdefault:\n\t\t\treturn false;\n\t}\n}\n\n/**\n * Check if two SelectionEndpoints are equal.\n *\n * Endpoints of different kinds (cursor vs whole-block) are never equal.\n *\n * @param ep1 - First endpoint.\n * @param ep2 - Second endpoint.\n * @return True if the endpoints represent the same position.\n */\nfunction areEndpointsEqual(\n\tep1: SelectionEndpoint,\n\tep2: SelectionEndpoint\n): boolean {\n\tif ( ep1.type !== ep2.type ) {\n\t\treturn false;\n\t}\n\tif (\n\t\tep1.type === SelectionType.Cursor &&\n\t\tep2.type === SelectionType.Cursor\n\t) {\n\t\treturn areCursorPositionsEqual(\n\t\t\tep1.cursorPosition,\n\t\t\tep2.cursorPosition\n\t\t);\n\t}\n\t// Both SelectionType.WholeBlock.\n\treturn Y.compareRelativePositions(\n\t\t( ep1 as SelectionWholeBlock ).blockPosition,\n\t\t( ep2 as SelectionWholeBlock ).blockPosition\n\t);\n}\n\n/**\n * Check if two cursor positions are equal.\n *\n * @param cursorPosition1 - The first cursor position.\n * @param cursorPosition2 - The second cursor position.\n * @return True if the cursor positions are equal, false otherwise.\n */\nfunction areCursorPositionsEqual(\n\tcursorPosition1: CursorPosition,\n\tcursorPosition2: CursorPosition\n): boolean {\n\tconst isRelativePositionEqual = Y.compareRelativePositions(\n\t\tcursorPosition1.relativePosition,\n\t\tcursorPosition2.relativePosition\n\t);\n\n\t// Ensure a change in calculated absolute offset results in a treating the cursor as modified.\n\t// This is necessary because Y.Text relative positions can remain the same after text changes.\n\tconst isAbsoluteOffsetEqual =\n\t\tcursorPosition1.absoluteOffset === cursorPosition2.absoluteOffset;\n\n\treturn isRelativePositionEqual && isAbsoluteOffsetEqual;\n}\n"],
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  "names": ["SelectionType", "SelectionDirection"]
}