` or ``. It is rendered as `` if this is the only block\n * element in that table cell and it does not have any attributes. It is rendered as `` otherwise.\n *\n * When table cell content changes, for example a second `paragraph` element is added, we need to ensure that the first `paragraph` is\n * re-rendered so it changes from `` to ``. The easiest way to do it is to re-render the entire table cell.\n *\n * @param {module:engine/model/model~Model} model\n * @param {module:engine/conversion/mapper~Mapper} mapper\n */\nexport default function injectTableCellRefreshPostFixer( model, mapper ) {\n\tmodel.document.registerPostFixer( () => tableCellRefreshPostFixer( model.document.differ, mapper ) );\n}\n\nfunction tableCellRefreshPostFixer( differ, mapper ) {\n\t// Stores cells to be refreshed, so the table cell will be refreshed once for multiple changes.\n\n\t// 1. Gather all changes inside table cell.\n\tconst cellsToCheck = new Set();\n\n\tfor ( const change of differ.getChanges() ) {\n\t\tconst parent = change.type == 'attribute' ? change.range.start.parent : change.position.parent;\n\n\t\tif ( parent.is( 'element', 'tableCell' ) ) {\n\t\t\tcellsToCheck.add( parent );\n\t\t}\n\t}\n\n\t// @if CK_DEBUG_TABLE // console.log( `Post-fixing table: Checking table cell to refresh (${ cellsToCheck.size }).` );\n\t// @if CK_DEBUG_TABLE // let paragraphsRefreshed = 0;\n\n\tfor ( const tableCell of cellsToCheck.values() ) {\n\t\tfor ( const paragraph of [ ...tableCell.getChildren() ].filter( child => shouldRefresh( child, mapper ) ) ) {\n\t\t\t// @if CK_DEBUG_TABLE // console.log( `Post-fixing table: refreshing paragraph in table cell (${++paragraphsRefreshed}).` );\n\t\t\tdiffer.refreshItem( paragraph );\n\t\t}\n\t}\n\n\t// Always return false to prevent the refresh post-fixer from re-running on the same set of changes and going into an infinite loop.\n\t// This \"post-fixer\" does not change the model structure so there shouldn't be need to run other post-fixers again.\n\t// See https://github.com/ckeditor/ckeditor5/issues/1936 & https://github.com/ckeditor/ckeditor5/issues/8200.\n\treturn false;\n}\n\n// Check if given model element needs refreshing.\n//\n// @param {module:engine/model/element~Element} modelElement\n// @param {module:engine/conversion/mapper~Mapper} mapper\n// @returns {Boolean}\nfunction shouldRefresh( child, mapper ) {\n\tif ( !child.is( 'element', 'paragraph' ) ) {\n\t\treturn false;\n\t}\n\n\tconst viewElement = mapper.toViewElement( child );\n\n\tif ( !viewElement ) {\n\t\treturn false;\n\t}\n\n\treturn isSingleParagraphWithoutAttributes( child ) !== viewElement.is( 'element', 'span' );\n}\n","/**\n * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/converters/table-cell-paragraph-post-fixer\n */\n\n/**\n * Injects a table cell post-fixer into the model which inserts a `paragraph` element into empty table cells.\n *\n * A table cell must contain at least one block element as a child. An empty table cell will have an empty `paragraph` as a child.\n *\n *\t\t
\n *\t\t\t\n *\t\t\t\t\n *\t\t\t\n *\t\t
\n *\n * Will be fixed to:\n *\n *\t\t\n *\t\t\t\n *\t\t\t\t\n *\t\t\t\n *\t\t
\n *\n * @param {module:engine/model/model~Model} model\n */\nexport default function injectTableCellParagraphPostFixer( model ) {\n\tmodel.document.registerPostFixer( writer => tableCellContentsPostFixer( writer, model ) );\n}\n\n// The table cell contents post-fixer.\n//\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/model~Model} model\nfunction tableCellContentsPostFixer( writer, model ) {\n\tconst changes = model.document.differ.getChanges();\n\n\tlet wasFixed = false;\n\n\tfor ( const entry of changes ) {\n\t\tif ( entry.type == 'insert' && entry.name == 'table' ) {\n\t\t\twasFixed = fixTable( entry.position.nodeAfter, writer ) || wasFixed;\n\t\t}\n\n\t\tif ( entry.type == 'insert' && entry.name == 'tableRow' ) {\n\t\t\twasFixed = fixTableRow( entry.position.nodeAfter, writer ) || wasFixed;\n\t\t}\n\n\t\tif ( entry.type == 'insert' && entry.name == 'tableCell' ) {\n\t\t\twasFixed = fixTableCellContent( entry.position.nodeAfter, writer ) || wasFixed;\n\t\t}\n\n\t\tif ( checkTableCellChange( entry ) ) {\n\t\t\twasFixed = fixTableCellContent( entry.position.parent, writer ) || wasFixed;\n\t\t}\n\t}\n\n\treturn wasFixed;\n}\n\n// Fixes all table cells in a table.\n//\n// @param {module:engine/model/element~Element} table\n// @param {module:engine/model/writer~Writer} writer\nfunction fixTable( table, writer ) {\n\tlet wasFixed = false;\n\n\tfor ( const row of table.getChildren() ) {\n\t\tif ( row.is( 'element', 'tableRow' ) ) {\n\t\t\twasFixed = fixTableRow( row, writer ) || wasFixed;\n\t\t}\n\t}\n\n\treturn wasFixed;\n}\n\n// Fixes all table cells in a table row.\n//\n// @param {module:engine/model/element~Element} tableRow\n// @param {module:engine/model/writer~Writer} writer\nfunction fixTableRow( tableRow, writer ) {\n\tlet wasFixed = false;\n\n\tfor ( const tableCell of tableRow.getChildren() ) {\n\t\twasFixed = fixTableCellContent( tableCell, writer ) || wasFixed;\n\t}\n\n\treturn wasFixed;\n}\n\n// Fixes all table cell content by:\n// - Adding a paragraph to a table cell without any child.\n// - Wrapping direct $text in a ``.\n//\n// @param {module:engine/model/element~Element} table\n// @param {module:engine/model/writer~Writer} writer\n// @returns {Boolean}\nfunction fixTableCellContent( tableCell, writer ) {\n\t// Insert paragraph to an empty table cell.\n\tif ( tableCell.childCount == 0 ) {\n\t\t// @if CK_DEBUG_TABLE // console.log( 'Post-fixing table: insert paragraph in empty cell.' );\n\n\t\twriter.insertElement( 'paragraph', tableCell );\n\n\t\treturn true;\n\t}\n\n\t// Check table cell children for directly placed text nodes.\n\t// Temporary solution. See https://github.com/ckeditor/ckeditor5/issues/1464.\n\tconst textNodes = Array.from( tableCell.getChildren() ).filter( child => child.is( '$text' ) );\n\n\t// @if CK_DEBUG_TABLE // textNodes.length && console.log( 'Post-fixing table: wrap cell content with paragraph.' );\n\n\tfor ( const child of textNodes ) {\n\t\twriter.wrap( writer.createRangeOn( child ), 'paragraph' );\n\t}\n\n\t// Return true when there were text nodes to fix.\n\treturn !!textNodes.length;\n}\n\n// Checks if a differ change should fix the table cell. This happens on:\n// - Removing content from the table cell (i.e. `tableCell` can be left empty).\n// - Adding a text node directly into a table cell.\n//\n// @param {Object} differ change entry\n// @returns {Boolean}\nfunction checkTableCellChange( entry ) {\n\tif ( !entry.position || !entry.position.parent.is( 'element', 'tableCell' ) ) {\n\t\treturn false;\n\t}\n\n\treturn entry.type == 'insert' && entry.name == '$text' || entry.type == 'remove';\n}\n"],"sourceRoot":""}