@wordpress/block-editor
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{
"version": 3,
"sources": ["../../../src/components/writing-flow/use-selection-observer.js"],
"sourcesContent": ["/**\n * WordPress dependencies\n */\nimport { useSelect, useDispatch } from '@wordpress/data';\nimport { useRefEffect } from '@wordpress/compose';\nimport { create } from '@wordpress/rich-text';\nimport { isSelectionForward } from '@wordpress/dom';\n\n/**\n * Internal dependencies\n */\nimport { store as blockEditorStore } from '../../store';\nimport { getBlockClientId } from '../../utils/dom';\n\n/**\n * Extract the selection start node from the selection. When the anchor node is\n * not a text node, the selection offset is the index of a child node.\n *\n * @param {Selection} selection The selection.\n *\n * @return {Element} The selection start node.\n */\nfunction extractSelectionStartNode( selection ) {\n\tconst { anchorNode, anchorOffset } = selection;\n\n\tif ( anchorNode.nodeType === anchorNode.TEXT_NODE ) {\n\t\treturn anchorNode;\n\t}\n\n\tif ( anchorOffset === 0 ) {\n\t\treturn anchorNode;\n\t}\n\n\treturn anchorNode.childNodes[ anchorOffset - 1 ];\n}\n\n/**\n * Extract the selection end node from the selection. When the focus node is not\n * a text node, the selection offset is the index of a child node. The selection\n * reaches up to but excluding that child node.\n *\n * @param {Selection} selection The selection.\n *\n * @return {Element} The selection start node.\n */\nfunction extractSelectionEndNode( selection ) {\n\tconst { focusNode, focusOffset } = selection;\n\n\tif ( focusNode.nodeType === focusNode.TEXT_NODE ) {\n\t\treturn focusNode;\n\t}\n\n\tif ( focusOffset === focusNode.childNodes.length ) {\n\t\treturn focusNode;\n\t}\n\n\t// When the selection is forward (the selection ends with the focus node),\n\t// the selection may extend into the next element with an offset of 0. This\n\t// may trigger multi selection even though the selection does not visually\n\t// end in the next block.\n\tif ( focusOffset === 0 && isSelectionForward( selection ) ) {\n\t\treturn focusNode.previousSibling ?? focusNode.parentElement;\n\t}\n\n\treturn focusNode.childNodes[ focusOffset ];\n}\n\nfunction findDepth( a, b ) {\n\tlet depth = 0;\n\n\twhile ( a[ depth ] === b[ depth ] ) {\n\t\tdepth++;\n\t}\n\n\treturn depth;\n}\n\n/**\n * Sets the `contenteditable` wrapper element to `value`.\n *\n * @param {HTMLElement} node Block element.\n * @param {boolean} value `contentEditable` value (true or false)\n */\nfunction setContentEditableWrapper( node, value ) {\n\t// Since we are calling this on every selection change, check if the value\n\t// needs to be updated first because it trigger the browser to recalculate\n\t// style.\n\tif ( node.contentEditable !== String( value ) ) {\n\t\tnode.contentEditable = value;\n\n\t\t// Firefox doesn't automatically move focus.\n\t\tif ( value ) {\n\t\t\tnode.focus();\n\t\t}\n\t}\n}\n\nfunction getRichTextElement( node ) {\n\tconst element =\n\t\tnode.nodeType === node.ELEMENT_NODE ? node : node.parentElement;\n\treturn element?.closest( '[data-wp-block-attribute-key]' );\n}\n\n/**\n * Sets a multi-selection based on the native selection across blocks.\n */\nexport default function useSelectionObserver() {\n\tconst { multiSelect, selectBlock, selectionChange } =\n\t\tuseDispatch( blockEditorStore );\n\tconst { getBlockParents, getBlockSelectionStart, isMultiSelecting } =\n\t\tuseSelect( blockEditorStore );\n\treturn useRefEffect(\n\t\t( node ) => {\n\t\t\tconst { ownerDocument } = node;\n\t\t\tconst { defaultView } = ownerDocument;\n\n\t\t\tfunction onSelectionChange( event ) {\n\t\t\t\tconst selection = defaultView.getSelection();\n\n\t\t\t\tif ( ! selection.rangeCount ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tconst startNode = extractSelectionStartNode( selection );\n\t\t\t\tconst endNode = extractSelectionEndNode( selection );\n\n\t\t\t\tif (\n\t\t\t\t\t! node.contains( startNode ) ||\n\t\t\t\t\t! node.contains( endNode )\n\t\t\t\t) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\t// If selection is collapsed and we haven't used `shift+click`,\n\t\t\t\t// end multi selection and disable the contentEditable wrapper.\n\t\t\t\t// We have to check about `shift+click` case because elements\n\t\t\t\t// that don't support text selection might be involved, and we might\n\t\t\t\t// update the clientIds to multi-select blocks.\n\t\t\t\t// For now we check if the event is a `mouse` event.\n\t\t\t\tconst isClickShift = event.shiftKey && event.type === 'mouseup';\n\t\t\t\tif ( selection.isCollapsed && ! isClickShift ) {\n\t\t\t\t\tif (\n\t\t\t\t\t\tnode.contentEditable === 'true' &&\n\t\t\t\t\t\t! isMultiSelecting()\n\t\t\t\t\t) {\n\t\t\t\t\t\tsetContentEditableWrapper( node, false );\n\t\t\t\t\t\tlet element =\n\t\t\t\t\t\t\tstartNode.nodeType === startNode.ELEMENT_NODE\n\t\t\t\t\t\t\t\t? startNode\n\t\t\t\t\t\t\t\t: startNode.parentElement;\n\t\t\t\t\t\telement = element?.closest( '[contenteditable]' );\n\t\t\t\t\t\telement?.focus();\n\t\t\t\t\t}\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tlet startClientId = getBlockClientId( startNode );\n\t\t\t\tlet endClientId = getBlockClientId( endNode );\n\n\t\t\t\t// If the selection has changed and we had pressed `shift+click`,\n\t\t\t\t// we need to check if in an element that doesn't support\n\t\t\t\t// text selection has been clicked.\n\t\t\t\tif ( isClickShift ) {\n\t\t\t\t\tconst selectedClientId = getBlockSelectionStart();\n\t\t\t\t\tconst clickedClientId = getBlockClientId( event.target );\n\t\t\t\t\t// `endClientId` is not defined if we end the selection by clicking a non-selectable block.\n\t\t\t\t\t// We need to check if there was already a selection with a non-selectable focusNode.\n\t\t\t\t\tconst focusNodeIsNonSelectable =\n\t\t\t\t\t\tclickedClientId !== endClientId;\n\t\t\t\t\tif (\n\t\t\t\t\t\t( startClientId === endClientId &&\n\t\t\t\t\t\t\tselection.isCollapsed ) ||\n\t\t\t\t\t\t! endClientId ||\n\t\t\t\t\t\tfocusNodeIsNonSelectable\n\t\t\t\t\t) {\n\t\t\t\t\t\tendClientId = clickedClientId;\n\t\t\t\t\t}\n\t\t\t\t\t// Handle the case when we have a non-selectable block\n\t\t\t\t\t// selected and click another one.\n\t\t\t\t\tif ( startClientId !== selectedClientId ) {\n\t\t\t\t\t\tstartClientId = selectedClientId;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// If the selection did not involve a block, return.\n\t\t\t\tif (\n\t\t\t\t\tstartClientId === undefined &&\n\t\t\t\t\tendClientId === undefined\n\t\t\t\t) {\n\t\t\t\t\tsetContentEditableWrapper( node, false );\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tconst isSingularSelection = startClientId === endClientId;\n\t\t\t\tif ( isSingularSelection ) {\n\t\t\t\t\tif ( ! isMultiSelecting() ) {\n\t\t\t\t\t\tselectBlock( startClientId );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tmultiSelect( startClientId, startClientId );\n\t\t\t\t\t}\n\t\t\t\t} else {\n\t\t\t\t\tconst startPath = [\n\t\t\t\t\t\t...getBlockParents( startClientId ),\n\t\t\t\t\t\tstartClientId,\n\t\t\t\t\t];\n\t\t\t\t\tconst endPath = [\n\t\t\t\t\t\t...getBlockParents( endClientId ),\n\t\t\t\t\t\tendClientId,\n\t\t\t\t\t];\n\t\t\t\t\tconst depth = findDepth( startPath, endPath );\n\n\t\t\t\t\tif (\n\t\t\t\t\t\tstartPath[ depth ] !== startClientId ||\n\t\t\t\t\t\tendPath[ depth ] !== endClientId\n\t\t\t\t\t) {\n\t\t\t\t\t\tmultiSelect( startPath[ depth ], endPath[ depth ] );\n\t\t\t\t\t\treturn;\n\t\t\t\t\t}\n\n\t\t\t\t\tconst richTextElementStart =\n\t\t\t\t\t\tgetRichTextElement( startNode );\n\t\t\t\t\tconst richTextElementEnd = getRichTextElement( endNode );\n\n\t\t\t\t\tif ( richTextElementStart && richTextElementEnd ) {\n\t\t\t\t\t\tconst range = selection.getRangeAt( 0 );\n\t\t\t\t\t\tconst richTextDataStart = create( {\n\t\t\t\t\t\t\telement: richTextElementStart,\n\t\t\t\t\t\t\trange,\n\t\t\t\t\t\t\t__unstableIsEditableTree: true,\n\t\t\t\t\t\t} );\n\t\t\t\t\t\tconst richTextDataEnd = create( {\n\t\t\t\t\t\t\telement: richTextElementEnd,\n\t\t\t\t\t\t\trange,\n\t\t\t\t\t\t\t__unstableIsEditableTree: true,\n\t\t\t\t\t\t} );\n\n\t\t\t\t\t\tconst startOffset =\n\t\t\t\t\t\t\trichTextDataStart.start ?? richTextDataStart.end;\n\t\t\t\t\t\tconst endOffset =\n\t\t\t\t\t\t\trichTextDataEnd.start ?? richTextDataEnd.end;\n\t\t\t\t\t\tselectionChange( {\n\t\t\t\t\t\t\tstart: {\n\t\t\t\t\t\t\t\tclientId: startClientId,\n\t\t\t\t\t\t\t\tattributeKey:\n\t\t\t\t\t\t\t\t\trichTextElementStart.dataset\n\t\t\t\t\t\t\t\t\t\t.wpBlockAttributeKey,\n\t\t\t\t\t\t\t\toffset: startOffset,\n\t\t\t\t\t\t\t},\n\t\t\t\t\t\t\tend: {\n\t\t\t\t\t\t\t\tclientId: endClientId,\n\t\t\t\t\t\t\t\tattributeKey:\n\t\t\t\t\t\t\t\t\trichTextElementEnd.dataset\n\t\t\t\t\t\t\t\t\t\t.wpBlockAttributeKey,\n\t\t\t\t\t\t\t\toffset: endOffset,\n\t\t\t\t\t\t\t},\n\t\t\t\t\t\t} );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tmultiSelect( startClientId, endClientId );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\townerDocument.addEventListener(\n\t\t\t\t'selectionchange',\n\t\t\t\tonSelectionChange\n\t\t\t);\n\t\t\tdefaultView.addEventListener( 'mouseup', onSelectionChange );\n\t\t\treturn () => {\n\t\t\t\townerDocument.removeEventListener(\n\t\t\t\t\t'selectionchange',\n\t\t\t\t\tonSelectionChange\n\t\t\t\t);\n\t\t\t\tdefaultView.removeEventListener( 'mouseup', onSelectionChange );\n\t\t\t};\n\t\t},\n\t\t[ multiSelect, selectBlock, selectionChange, getBlockParents ]\n\t);\n}\n"],
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"names": ["import_dom", "blockEditorStore"]
}