@wordpress/editor/build/components/collaborators-overlay/cursor-dom-utils.cjs.map

Enhanced block editor for WordPress posts.

{
  "version": 3,
  "sources": ["../../../src/components/collaborators-overlay/cursor-dom-utils.ts"],
  "sourcesContent": ["export interface SelectionRect {\n\tx: number;\n\ty: number;\n\twidth: number;\n\theight: number;\n}\n\nexport interface CursorCoords {\n\tx: number;\n\ty: number;\n\theight: number;\n}\n\nconst MAX_NODE_OFFSET_COUNT = 500;\n\n/**\n * Given a selection, returns the coordinates of the cursor in the block.\n *\n * @param absolutePositionIndex - The absolute position index\n * @param blockElement          - The block element (or null if deleted)\n * @param editorDocument        - The editor document\n * @param overlayRect           - Pre-computed bounding rect of the overlay element\n * @return The position of the cursor\n */\nexport const getCursorPosition = (\n\tabsolutePositionIndex: number | null,\n\tblockElement: HTMLElement | null,\n\teditorDocument: Document,\n\toverlayRect: DOMRect\n): CursorCoords | null => {\n\tif ( absolutePositionIndex === null || ! blockElement ) {\n\t\treturn null;\n\t}\n\n\treturn (\n\t\tgetOffsetPositionInBlock(\n\t\t\tblockElement,\n\t\t\tabsolutePositionIndex,\n\t\t\teditorDocument,\n\t\t\toverlayRect\n\t\t) ?? null\n\t);\n};\n\n/**\n * Given a block element and a character offset, returns the coordinates for drawing a visual cursor in the block.\n *\n * @param blockElement   - The block element\n * @param charOffset     - The character offset\n * @param editorDocument - The editor document\n * @param overlayRect    - Pre-computed bounding rect of the overlay element\n * @return The position of the cursor\n */\nconst getOffsetPositionInBlock = (\n\tblockElement: HTMLElement,\n\tcharOffset: number,\n\teditorDocument: Document,\n\toverlayRect: DOMRect\n) => {\n\tconst { node, offset } = findInnerBlockOffset(\n\t\tblockElement,\n\t\tcharOffset,\n\t\teditorDocument\n\t);\n\n\tconst cursorRange = editorDocument.createRange();\n\n\ttry {\n\t\tcursorRange.setStart( node, offset );\n\t} catch ( error ) {\n\t\treturn null;\n\t}\n\n\t// Ensure the range only represents single point in the DOM.\n\tcursorRange.collapse( true );\n\n\tconst cursorRect = cursorRange.getBoundingClientRect();\n\tconst blockRect = blockElement.getBoundingClientRect();\n\n\tlet cursorX = 0;\n\tlet cursorY = 0;\n\n\tif (\n\t\tcursorRect.x === 0 &&\n\t\tcursorRect.y === 0 &&\n\t\tcursorRect.width === 0 &&\n\t\tcursorRect.height === 0\n\t) {\n\t\t// This can happen for empty blocks.\n\t\tcursorX = blockRect.left - overlayRect.left;\n\t\tcursorY = blockRect.top - overlayRect.top;\n\t} else {\n\t\tcursorX = cursorRect.left - overlayRect.left;\n\t\tcursorY = cursorRect.top - overlayRect.top;\n\t}\n\n\tlet cursorHeight = cursorRect.height;\n\tif ( cursorHeight === 0 ) {\n\t\tconst view = editorDocument.defaultView ?? window;\n\t\tcursorHeight =\n\t\t\tparseInt( view.getComputedStyle( blockElement ).lineHeight, 10 ) ||\n\t\t\tblockRect.height;\n\t}\n\n\treturn {\n\t\tx: cursorX,\n\t\ty: cursorY,\n\t\theight: cursorHeight,\n\t};\n};\n\n/**\n * Computes selection highlight rectangles for a text range within a single block.\n *\n * @param blockElement   - The block element\n * @param startOffset    - Start character offset within the block\n * @param endOffset      - End character offset within the block\n * @param editorDocument - The editor document\n * @param overlayRect    - Pre-computed bounding rect of the overlay element\n * @return Array of selection rectangles relative to the overlay, or null on failure\n */\nexport const getSelectionRects = (\n\tblockElement: HTMLElement,\n\tstartOffset: number,\n\tendOffset: number,\n\teditorDocument: Document,\n\toverlayRect: DOMRect\n): SelectionRect[] | null => {\n\t// Normalize direction.\n\tlet normalizedStart = startOffset;\n\tlet normalizedEnd = endOffset;\n\tif ( normalizedStart > normalizedEnd ) {\n\t\t[ normalizedStart, normalizedEnd ] = [ normalizedEnd, normalizedStart ];\n\t}\n\n\tconst startPos = findInnerBlockOffset(\n\t\tblockElement,\n\t\tnormalizedStart,\n\t\teditorDocument\n\t);\n\tconst endPos = findInnerBlockOffset(\n\t\tblockElement,\n\t\tnormalizedEnd,\n\t\teditorDocument\n\t);\n\n\tconst range = editorDocument.createRange();\n\ttry {\n\t\trange.setStart( startPos.node, startPos.offset );\n\t\trange.setEnd( endPos.node, endPos.offset );\n\t} catch {\n\t\treturn null;\n\t}\n\n\tconst clientRects = range.getClientRects();\n\tconst rects: SelectionRect[] = [];\n\n\tfor ( const rect of clientRects ) {\n\t\tif ( rect.width === 0 && rect.height === 0 ) {\n\t\t\tcontinue;\n\t\t}\n\t\tconst x = rect.left - overlayRect.left;\n\t\tconst y = rect.top - overlayRect.top;\n\n\t\t// Range.getClientRects() can return duplicate rects at inline\n\t\t// formatting boundaries (e.g. <em>, <strong>). Skip exact matches.\n\t\tconst isDuplicate = rects.some(\n\t\t\t( r ) =>\n\t\t\t\tr.x === x &&\n\t\t\t\tr.y === y &&\n\t\t\t\tr.width === rect.width &&\n\t\t\t\tr.height === rect.height\n\t\t);\n\t\tif ( isDuplicate ) {\n\t\t\tcontinue;\n\t\t}\n\n\t\trects.push( {\n\t\t\tx,\n\t\t\ty,\n\t\t\twidth: rect.width,\n\t\t\theight: rect.height,\n\t\t} );\n\t}\n\n\treturn rects.length > 0 ? rects : null;\n};\n\n/**\n * Computes selection highlight rectangles for the full content of a block.\n * Used for intermediate blocks in a multi-block selection.\n *\n * @param blockElement   - The block element\n * @param editorDocument - The editor document\n * @param overlayRect    - Pre-computed bounding rect of the overlay element\n * @return Array of selection rectangles relative to the overlay\n */\nexport const getFullBlockSelectionRects = (\n\tblockElement: HTMLElement,\n\teditorDocument: Document,\n\toverlayRect: DOMRect\n): SelectionRect[] => {\n\tconst range = editorDocument.createRange();\n\trange.selectNodeContents( blockElement );\n\tconst clientRects = range.getClientRects();\n\tconst rects: SelectionRect[] = [];\n\n\tfor ( const rect of clientRects ) {\n\t\tif ( rect.width === 0 && rect.height === 0 ) {\n\t\t\tcontinue;\n\t\t}\n\t\trects.push( {\n\t\t\tx: rect.left - overlayRect.left,\n\t\t\ty: rect.top - overlayRect.top,\n\t\t\twidth: rect.width,\n\t\t\theight: rect.height,\n\t\t} );\n\t}\n\n\t// Fallback: if getClientRects returned nothing, use the block's bounding rect.\n\tif ( rects.length === 0 ) {\n\t\tconst blockRect = blockElement.getBoundingClientRect();\n\t\tif ( blockRect.width > 0 && blockRect.height > 0 ) {\n\t\t\trects.push( {\n\t\t\t\tx: blockRect.left - overlayRect.left,\n\t\t\t\ty: blockRect.top - overlayRect.top,\n\t\t\t\twidth: blockRect.width,\n\t\t\t\theight: blockRect.height,\n\t\t\t} );\n\t\t}\n\t}\n\n\treturn rects;\n};\n\n/**\n * Finds all block elements between two blocks in DOM order (exclusive of start and end).\n *\n * @param startBlockId   - The clientId of the start block\n * @param endBlockId     - The clientId of the end block\n * @param editorDocument - The editor document\n * @return Array of intermediate block HTMLElements in document order\n */\nexport const getBlocksBetween = (\n\tstartBlockId: string,\n\tendBlockId: string,\n\teditorDocument: Document\n): HTMLElement[] => {\n\tconst allBlocks =\n\t\teditorDocument.querySelectorAll< HTMLElement >( '[data-block]' );\n\n\tlet startIndex = -1;\n\tlet endIndex = -1;\n\n\tfor ( let i = 0; i < allBlocks.length; i++ ) {\n\t\tconst blockId = allBlocks[ i ].getAttribute( 'data-block' );\n\t\tif ( blockId === startBlockId ) {\n\t\t\tstartIndex = i;\n\t\t}\n\t\tif ( blockId === endBlockId ) {\n\t\t\tendIndex = i;\n\t\t}\n\t}\n\n\tif ( startIndex === -1 || endIndex === -1 ) {\n\t\treturn [];\n\t}\n\n\t// Normalize order.\n\tif ( startIndex > endIndex ) {\n\t\t[ startIndex, endIndex ] = [ endIndex, startIndex ];\n\t}\n\n\tconst result: HTMLElement[] = [];\n\tfor ( let i = startIndex + 1; i < endIndex; i++ ) {\n\t\tresult.push( allBlocks[ i ] );\n\t}\n\treturn result;\n};\n\n/**\n * Given a block element and a character offset, returns an exact inner node and offset for use in a range.\n *\n * @param blockElement   - The block element\n * @param offset         - The character offset\n * @param editorDocument - The editor document\n * @return The node and offset of the character at the offset\n */\nexport const findInnerBlockOffset = (\n\tblockElement: HTMLElement,\n\toffset: number,\n\teditorDocument: Document\n) => {\n\tconst treeWalker = editorDocument.createTreeWalker(\n\t\tblockElement,\n\t\tNodeFilter.SHOW_TEXT | NodeFilter.SHOW_ELEMENT // eslint-disable-line no-bitwise\n\t);\n\n\tlet currentOffset = 0;\n\tlet lastTextNode: Node | null = null;\n\n\tlet node: Node | null = null;\n\tlet nodeCount = 1;\n\n\twhile ( ( node = treeWalker.nextNode() ) ) {\n\t\tnodeCount++;\n\n\t\tif ( nodeCount > MAX_NODE_OFFSET_COUNT ) {\n\t\t\t// If we've walked too many nodes, return the last text node or the beginning of the block.\n\t\t\tif ( lastTextNode ) {\n\t\t\t\treturn { node: lastTextNode, offset: 0 };\n\t\t\t}\n\t\t\treturn { node: blockElement, offset: 0 };\n\t\t}\n\n\t\tconst nodeLength = node.nodeValue?.length ?? 0;\n\n\t\tif ( node.nodeType === Node.ELEMENT_NODE ) {\n\t\t\tif ( node.nodeName === 'BR' ) {\n\t\t\t\t// Treat <br> as a single \"\\n\" character.\n\n\t\t\t\tif ( currentOffset + 1 >= offset ) {\n\t\t\t\t\t// If the <br> occurs right on the target offset, return the next text node.\n\t\t\t\t\tconst nodeAfterBr = treeWalker.nextNode();\n\n\t\t\t\t\tif ( nodeAfterBr?.nodeType === Node.TEXT_NODE ) {\n\t\t\t\t\t\treturn { node: nodeAfterBr, offset: 0 };\n\t\t\t\t\t} else if ( lastTextNode ) {\n\t\t\t\t\t\t// If there's no text node after the <br>, return the end offset of the last text node.\n\t\t\t\t\t\treturn {\n\t\t\t\t\t\t\tnode: lastTextNode,\n\t\t\t\t\t\t\toffset: lastTextNode.nodeValue?.length ?? 0,\n\t\t\t\t\t\t};\n\t\t\t\t\t}\n\t\t\t\t\t// Just in case, if there's no last text node, return the beginning of the block.\n\t\t\t\t\treturn { node: blockElement, offset: 0 };\n\t\t\t\t}\n\n\t\t\t\t// The <br> is before the target offset. Count it as a single character.\n\t\t\t\tcurrentOffset += 1;\n\t\t\t\tcontinue;\n\t\t\t} else {\n\t\t\t\t// Skip other element types.\n\t\t\t\tcontinue;\n\t\t\t}\n\t\t}\n\n\t\tif ( nodeLength === 0 ) {\n\t\t\t// Skip empty nodes.\n\t\t\tcontinue;\n\t\t}\n\n\t\tif ( currentOffset + nodeLength >= offset ) {\n\t\t\t// This node exceeds the target offset. Return the node and the position of the offset within it.\n\t\t\treturn { node, offset: offset - currentOffset };\n\t\t}\n\n\t\tcurrentOffset += nodeLength;\n\n\t\tif ( node.nodeType === Node.TEXT_NODE ) {\n\t\t\tlastTextNode = node;\n\t\t}\n\t}\n\n\tif ( lastTextNode && lastTextNode.nodeValue?.length ) {\n\t\t// We didn't reach the target offset. Return the last text node's last character.\n\t\treturn { node: lastTextNode, offset: lastTextNode.nodeValue.length };\n\t}\n\n\t// We didn't find any text nodes. Return the beginning of the block.\n\treturn { node: blockElement, offset: 0 };\n};\n\n/**\n * Check if node `a` precedes node `b` in document order.\n *\n * @param a - First node.\n * @param b - Second node.\n * @return True if `a` comes before `b`.\n */\nexport const isNodeBefore = ( a: Node, b: Node ): boolean =>\n\ta.compareDocumentPosition( b ) === Node.DOCUMENT_POSITION_FOLLOWING;\n"],
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