tableutils.js 33 KB

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  1. /**
  2. * @license Copyright (c) 2003-2020, CKSource - Frederico Knabben. All rights reserved.
  3. * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
  4. */
  5. /**
  6. * @module table/tableutils
  7. */
  8. import Plugin from '@ckeditor/ckeditor5-core/src/plugin';
  9. import TableWalker from './tablewalker';
  10. import { createEmptyTableCell, updateNumericAttribute } from './utils/common';
  11. /**
  12. * The table utilities plugin.
  13. *
  14. * @extends module:core/plugin~Plugin
  15. */
  16. export default class TableUtils extends Plugin {
  17. /**
  18. * @inheritDoc
  19. */
  20. static get pluginName() {
  21. return 'TableUtils';
  22. }
  23. /**
  24. * Returns the table cell location as an object with table row and table column indexes.
  25. *
  26. * For instance, in the table below:
  27. *
  28. * 0 1 2 3
  29. * +---+---+---+---+
  30. * 0 | a | b | c |
  31. * + + +---+
  32. * 1 | | | d |
  33. * +---+---+ +---+
  34. * 2 | e | | f |
  35. * +---+---+---+---+
  36. *
  37. * the method will return:
  38. *
  39. * const cellA = table.getNodeByPath( [ 0, 0 ] );
  40. * editor.plugins.get( 'TableUtils' ).getCellLocation( cellA );
  41. * // will return { row: 0, column: 0 }
  42. *
  43. * const cellD = table.getNodeByPath( [ 1, 0 ] );
  44. * editor.plugins.get( 'TableUtils' ).getCellLocation( cellD );
  45. * // will return { row: 1, column: 3 }
  46. *
  47. * @param {module:engine/model/element~Element} tableCell
  48. * @returns {Object} Returns a `{row, column}` object.
  49. */
  50. getCellLocation( tableCell ) {
  51. const tableRow = tableCell.parent;
  52. const table = tableRow.parent;
  53. const rowIndex = table.getChildIndex( tableRow );
  54. const tableWalker = new TableWalker( table, { row: rowIndex } );
  55. for ( const { cell, row, column } of tableWalker ) {
  56. if ( cell === tableCell ) {
  57. return { row, column };
  58. }
  59. }
  60. }
  61. /**
  62. * Creates an empty table with a proper structure. The table needs to be inserted into the model,
  63. * for example, by using the {@link module:engine/model/model~Model#insertContent} function.
  64. *
  65. * model.change( ( writer ) => {
  66. * // Create a table of 2 rows and 7 columns:
  67. * const table = tableUtils.createTable( writer, 2, 7);
  68. *
  69. * // Insert a table to the model at the best position taking the current selection:
  70. * model.insertContent( table );
  71. * }
  72. *
  73. * @param {module:engine/model/writer~Writer} writer The model writer.
  74. * @param {Number} rows The number of rows to create.
  75. * @param {Number} columns The number of columns to create.
  76. * @returns {module:engine/model/element~Element} The created table element.
  77. */
  78. createTable( writer, rows, columns ) {
  79. const table = writer.createElement( 'table' );
  80. createEmptyRows( writer, table, 0, rows, columns );
  81. return table;
  82. }
  83. /**
  84. * Inserts rows into a table.
  85. *
  86. * editor.plugins.get( 'TableUtils' ).insertRows( table, { at: 1, rows: 2 } );
  87. *
  88. * Assuming the table on the left, the above code will transform it to the table on the right:
  89. *
  90. * row index
  91. * 0 +---+---+---+ `at` = 1, +---+---+---+ 0
  92. * | a | b | c | `rows` = 2, | a | b | c |
  93. * 1 + +---+---+ <-- insert here + +---+---+ 1
  94. * | | d | e | | | | |
  95. * 2 + +---+---+ will give: + +---+---+ 2
  96. * | | f | g | | | | |
  97. * 3 +---+---+---+ + +---+---+ 3
  98. * | | d | e |
  99. * + +---+---+ 4
  100. * + + f | g |
  101. * +---+---+---+ 5
  102. *
  103. * @param {module:engine/model/element~Element} table The table model element where the rows will be inserted.
  104. * @param {Object} options
  105. * @param {Number} [options.at=0] The row index at which the rows will be inserted.
  106. * @param {Number} [options.rows=1] The number of rows to insert.
  107. * @param {Boolean|undefined} [options.copyStructureFromAbove] The flag for copying row structure. Note that
  108. * the row structure will not be copied if this option is not provided.
  109. */
  110. insertRows( table, options = {} ) {
  111. const model = this.editor.model;
  112. const insertAt = options.at || 0;
  113. const rowsToInsert = options.rows || 1;
  114. const isCopyStructure = options.copyStructureFromAbove !== undefined;
  115. const copyStructureFrom = options.copyStructureFromAbove ? insertAt - 1 : insertAt;
  116. const rows = this.getRows( table );
  117. const columns = this.getColumns( table );
  118. model.change( writer => {
  119. const headingRows = table.getAttribute( 'headingRows' ) || 0;
  120. // Inserting rows inside heading section requires to update `headingRows` attribute as the heading section will grow.
  121. if ( headingRows > insertAt ) {
  122. writer.setAttribute( 'headingRows', headingRows + rowsToInsert, table );
  123. }
  124. // Inserting at the end or at the beginning of a table doesn't require to calculate anything special.
  125. if ( !isCopyStructure && ( insertAt === 0 || insertAt === rows ) ) {
  126. createEmptyRows( writer, table, insertAt, rowsToInsert, columns );
  127. return;
  128. }
  129. // Iterate over all the rows above the inserted rows in order to check for the row-spanned cells.
  130. const walkerEndRow = isCopyStructure ? Math.max( insertAt, copyStructureFrom ) : insertAt;
  131. const tableIterator = new TableWalker( table, { endRow: walkerEndRow } );
  132. // Store spans of the reference row to reproduce it's structure. This array is column number indexed.
  133. const rowColSpansMap = new Array( columns ).fill( 1 );
  134. for ( const { row, column, cellHeight, cellWidth, cell } of tableIterator ) {
  135. const lastCellRow = row + cellHeight - 1;
  136. const isOverlappingInsertedRow = row < insertAt && insertAt <= lastCellRow;
  137. const isReferenceRow = row <= copyStructureFrom && copyStructureFrom <= lastCellRow;
  138. // If the cell is row-spanned and overlaps the inserted row, then reserve space for it in the row map.
  139. if ( isOverlappingInsertedRow ) {
  140. // This cell overlaps the inserted rows so we need to expand it further.
  141. writer.setAttribute( 'rowspan', cellHeight + rowsToInsert, cell );
  142. // Mark this cell with negative number to indicate how many cells should be skipped when adding the new cells.
  143. rowColSpansMap[ column ] = -cellWidth;
  144. }
  145. // Store the colspan from reference row.
  146. else if ( isCopyStructure && isReferenceRow ) {
  147. rowColSpansMap[ column ] = cellWidth;
  148. }
  149. }
  150. for ( let rowIndex = 0; rowIndex < rowsToInsert; rowIndex++ ) {
  151. const tableRow = writer.createElement( 'tableRow' );
  152. writer.insert( tableRow, table, insertAt );
  153. for ( let cellIndex = 0; cellIndex < rowColSpansMap.length; cellIndex++ ) {
  154. const colspan = rowColSpansMap[ cellIndex ];
  155. const insertPosition = writer.createPositionAt( tableRow, 'end' );
  156. // Insert the empty cell only if this slot is not row-spanned from any other cell.
  157. if ( colspan > 0 ) {
  158. createEmptyTableCell( writer, insertPosition, colspan > 1 ? { colspan } : null );
  159. }
  160. // Skip the col-spanned slots, there won't be any cells.
  161. cellIndex += Math.abs( colspan ) - 1;
  162. }
  163. }
  164. } );
  165. }
  166. /**
  167. * Inserts columns into a table.
  168. *
  169. * editor.plugins.get( 'TableUtils' ).insertColumns( table, { at: 1, columns: 2 } );
  170. *
  171. * Assuming the table on the left, the above code will transform it to the table on the right:
  172. *
  173. * 0 1 2 3 0 1 2 3 4 5
  174. * +---+---+---+ +---+---+---+---+---+
  175. * | a | b | | a | b |
  176. * + +---+ + +---+
  177. * | | c | | | c |
  178. * +---+---+---+ will give: +---+---+---+---+---+
  179. * | d | e | f | | d | | | e | f |
  180. * +---+ +---+ +---+---+---+ +---+
  181. * | g | | h | | g | | | | h |
  182. * +---+---+---+ +---+---+---+---+---+
  183. * | i | | i |
  184. * +---+---+---+ +---+---+---+---+---+
  185. * ^---- insert here, `at` = 1, `columns` = 2
  186. *
  187. * @param {module:engine/model/element~Element} table The table model element where the columns will be inserted.
  188. * @param {Object} options
  189. * @param {Number} [options.at=0] The column index at which the columns will be inserted.
  190. * @param {Number} [options.columns=1] The number of columns to insert.
  191. */
  192. insertColumns( table, options = {} ) {
  193. const model = this.editor.model;
  194. const insertAt = options.at || 0;
  195. const columnsToInsert = options.columns || 1;
  196. model.change( writer => {
  197. const headingColumns = table.getAttribute( 'headingColumns' );
  198. // Inserting columns inside heading section requires to update `headingColumns` attribute as the heading section will grow.
  199. if ( insertAt < headingColumns ) {
  200. writer.setAttribute( 'headingColumns', headingColumns + columnsToInsert, table );
  201. }
  202. const tableColumns = this.getColumns( table );
  203. // Inserting at the end and at the beginning of a table doesn't require to calculate anything special.
  204. if ( insertAt === 0 || tableColumns === insertAt ) {
  205. for ( const tableRow of table.getChildren() ) {
  206. createCells( columnsToInsert, writer, writer.createPositionAt( tableRow, insertAt ? 'end' : 0 ) );
  207. }
  208. return;
  209. }
  210. const tableWalker = new TableWalker( table, { column: insertAt, includeAllSlots: true } );
  211. for ( const tableSlot of tableWalker ) {
  212. const { row, cell, cellAnchorColumn, cellAnchorRow, cellWidth, cellHeight } = tableSlot;
  213. // When iterating over column the table walker outputs either:
  214. // - cells at given column index (cell "e" from method docs),
  215. // - spanned columns (spanned cell from row between cells "g" and "h" - spanned by "e", only if `includeAllSlots: true`),
  216. // - or a cell from the same row which spans over this column (cell "a").
  217. if ( cellAnchorColumn < insertAt ) {
  218. // If cell is anchored in previous column, it is a cell that spans over an inserted column (cell "a" & "i").
  219. // For such cells expand them by a number of columns inserted.
  220. writer.setAttribute( 'colspan', cellWidth + columnsToInsert, cell );
  221. // This cell will overlap cells in rows below so skip them (because of `includeAllSlots` option) - (cell "a")
  222. const lastCellRow = cellAnchorRow + cellHeight - 1;
  223. for ( let i = row; i <= lastCellRow; i++ ) {
  224. tableWalker.skipRow( i );
  225. }
  226. } else {
  227. // It's either cell at this column index or spanned cell by a row-spanned cell from row above.
  228. // In table above it's cell "e" and a spanned position from row below (empty cell between cells "g" and "h")
  229. createCells( columnsToInsert, writer, tableSlot.getPositionBefore() );
  230. }
  231. }
  232. } );
  233. }
  234. /**
  235. * Removes rows from the given `table`.
  236. *
  237. * This method re-calculates the table geometry including `rowspan` attribute of table cells overlapping removed rows
  238. * and table headings values.
  239. *
  240. * editor.plugins.get( 'TableUtils' ).removeRows( table, { at: 1, rows: 2 } );
  241. *
  242. * Executing the above code in the context of the table on the left will transform its structure as presented on the right:
  243. *
  244. * row index
  245. * ┌───┬───┬───┐ `at` = 1 ┌───┬───┬───┐
  246. * 0 │ a │ b │ c │ `rows` = 2 │ a │ b │ c │ 0
  247. * │ ├───┼───┤ │ ├───┼───┤
  248. * 1 │ │ d │ e │ <-- remove from here │ │ d │ g │ 1
  249. * │ │ ├───┤ will give: ├───┼───┼───┤
  250. * 2 │ │ │ f │ │ h │ i │ j │ 2
  251. * │ │ ├───┤ └───┴───┴───┘
  252. * 3 │ │ │ g │
  253. * ├───┼───┼───┤
  254. * 4 │ h │ i │ j │
  255. * └───┴───┴───┘
  256. *
  257. * @param {module:engine/model/element~Element} table
  258. * @param {Object} options
  259. * @param {Number} options.at The row index at which the removing rows will start.
  260. * @param {Number} [options.rows=1] The number of rows to remove.
  261. */
  262. removeRows( table, options ) {
  263. const model = this.editor.model;
  264. const rowsToRemove = options.rows || 1;
  265. const first = options.at;
  266. const last = first + rowsToRemove - 1;
  267. const batch = options.batch || 'default';
  268. model.enqueueChange( batch, writer => {
  269. // Removing rows from the table require that most calculations to be done prior to changing table structure.
  270. // Preparations must be done in the same enqueueChange callback to use the current table structure.
  271. // 1. Preparation - get row-spanned cells that have to be modified after removing rows.
  272. const { cellsToMove, cellsToTrim } = getCellsToMoveAndTrimOnRemoveRow( table, first, last );
  273. // 2. Execution
  274. // 2a. Move cells from removed rows that extends over a removed section - must be done before removing rows.
  275. // This will fill any gaps in a rows below that previously were empty because of row-spanned cells.
  276. if ( cellsToMove.size ) {
  277. const rowAfterRemovedSection = last + 1;
  278. moveCellsToRow( table, rowAfterRemovedSection, cellsToMove, writer );
  279. }
  280. // 2b. Remove all required rows.
  281. for ( let i = last; i >= first; i-- ) {
  282. writer.remove( table.getChild( i ) );
  283. }
  284. // 2c. Update cells from rows above that overlap removed section. Similar to step 2 but does not involve moving cells.
  285. for ( const { rowspan, cell } of cellsToTrim ) {
  286. updateNumericAttribute( 'rowspan', rowspan, cell, writer );
  287. }
  288. // 2d. Adjust heading rows if removed rows were in a heading section.
  289. updateHeadingRows( table, first, last, model, batch );
  290. } );
  291. }
  292. /**
  293. * Removes columns from the given `table`.
  294. *
  295. * This method re-calculates the table geometry including the `colspan` attribute of table cells overlapping removed columns
  296. * and table headings values.
  297. *
  298. * editor.plugins.get( 'TableUtils' ).removeColumns( table, { at: 1, columns: 2 } );
  299. *
  300. * Executing the above code in the context of the table on the left will transform its structure as presented on the right:
  301. *
  302. * 0 1 2 3 4 0 1 2
  303. * ┌───────────────┬───┐ ┌───────┬───┐
  304. * │ a │ b │ │ a │ b │
  305. * │ ├───┤ │ ├───┤
  306. * │ │ c │ │ │ c │
  307. * ├───┬───┬───┬───┼───┤ will give: ├───┬───┼───┤
  308. * │ d │ e │ f │ g │ h │ │ d │ g │ h │
  309. * ├───┼───┼───┤ ├───┤ ├───┤ ├───┤
  310. * │ i │ j │ k │ │ l │ │ i │ │ l │
  311. * ├───┴───┴───┴───┴───┤ ├───┴───┴───┤
  312. * │ m │ │ m │
  313. * └───────────────────┘ └───────────┘
  314. * ^---- remove from here, `at` = 1, `columns` = 2
  315. *
  316. * @param {module:engine/model/element~Element} table
  317. * @param {Object} options
  318. * @param {Number} options.at The row index at which the removing columns will start.
  319. * @param {Number} [options.columns=1] The number of columns to remove.
  320. */
  321. removeColumns( table, options ) {
  322. const model = this.editor.model;
  323. const first = options.at;
  324. const columnsToRemove = options.columns || 1;
  325. const last = options.at + columnsToRemove - 1;
  326. model.change( writer => {
  327. adjustHeadingColumns( table, { first, last }, writer );
  328. const emptyRowsIndexes = [];
  329. for ( let removedColumnIndex = last; removedColumnIndex >= first; removedColumnIndex-- ) {
  330. for ( const { cell, column, cellWidth } of [ ...new TableWalker( table ) ] ) {
  331. // If colspaned cell overlaps removed column decrease its span.
  332. if ( column <= removedColumnIndex && cellWidth > 1 && column + cellWidth > removedColumnIndex ) {
  333. updateNumericAttribute( 'colspan', cellWidth - 1, cell, writer );
  334. } else if ( column === removedColumnIndex ) {
  335. const cellRow = cell.parent;
  336. // The cell in removed column has colspan of 1.
  337. writer.remove( cell );
  338. // If the cell was the last one in the row, get rid of the entire row.
  339. // https://github.com/ckeditor/ckeditor5/issues/6429
  340. if ( !cellRow.childCount ) {
  341. emptyRowsIndexes.push( cellRow.index );
  342. }
  343. }
  344. }
  345. }
  346. emptyRowsIndexes.reverse().forEach( row => this.removeRows( table, { at: row, batch: writer.batch } ) );
  347. } );
  348. }
  349. /**
  350. * Divides a table cell vertically into several ones.
  351. *
  352. * The cell will be visually split into more cells by updating colspans of other cells in a column
  353. * and inserting cells (columns) after that cell.
  354. *
  355. * In the table below, if cell "a" is split into 3 cells:
  356. *
  357. * +---+---+---+
  358. * | a | b | c |
  359. * +---+---+---+
  360. * | d | e | f |
  361. * +---+---+---+
  362. *
  363. * it will result in the table below:
  364. *
  365. * +---+---+---+---+---+
  366. * | a | | | b | c |
  367. * +---+---+---+---+---+
  368. * | d | e | f |
  369. * +---+---+---+---+---+
  370. *
  371. * So cell "d" will get its `colspan` updated to `3` and 2 cells will be added (2 columns will be created).
  372. *
  373. * Splitting a cell that already has a `colspan` attribute set will distribute the cell `colspan` evenly and the remainder
  374. * will be left to the original cell:
  375. *
  376. * +---+---+---+
  377. * | a |
  378. * +---+---+---+
  379. * | b | c | d |
  380. * +---+---+---+
  381. *
  382. * Splitting cell "a" with `colspan=3` into 2 cells will create 1 cell with a `colspan=a` and cell "a" that will have `colspan=2`:
  383. *
  384. * +---+---+---+
  385. * | a | |
  386. * +---+---+---+
  387. * | b | c | d |
  388. * +---+---+---+
  389. *
  390. * @param {module:engine/model/element~Element} tableCell
  391. * @param {Number} numberOfCells
  392. */
  393. splitCellVertically( tableCell, numberOfCells = 2 ) {
  394. const model = this.editor.model;
  395. const tableRow = tableCell.parent;
  396. const table = tableRow.parent;
  397. const rowspan = parseInt( tableCell.getAttribute( 'rowspan' ) || 1 );
  398. const colspan = parseInt( tableCell.getAttribute( 'colspan' ) || 1 );
  399. model.change( writer => {
  400. // First check - the cell spans over multiple rows so before doing anything else just split this cell.
  401. if ( colspan > 1 ) {
  402. // Get spans of new (inserted) cells and span to update of split cell.
  403. const { newCellsSpan, updatedSpan } = breakSpanEvenly( colspan, numberOfCells );
  404. updateNumericAttribute( 'colspan', updatedSpan, tableCell, writer );
  405. // Each inserted cell will have the same attributes:
  406. const newCellsAttributes = {};
  407. // Do not store default value in the model.
  408. if ( newCellsSpan > 1 ) {
  409. newCellsAttributes.colspan = newCellsSpan;
  410. }
  411. // Copy rowspan of split cell.
  412. if ( rowspan > 1 ) {
  413. newCellsAttributes.rowspan = rowspan;
  414. }
  415. const cellsToInsert = colspan > numberOfCells ? numberOfCells - 1 : colspan - 1;
  416. createCells( cellsToInsert, writer, writer.createPositionAfter( tableCell ), newCellsAttributes );
  417. }
  418. // Second check - the cell has colspan of 1 or we need to create more cells then the currently one spans over.
  419. if ( colspan < numberOfCells ) {
  420. const cellsToInsert = numberOfCells - colspan;
  421. // First step: expand cells on the same column as split cell.
  422. const tableMap = [ ...new TableWalker( table ) ];
  423. // Get the column index of split cell.
  424. const { column: splitCellColumn } = tableMap.find( ( { cell } ) => cell === tableCell );
  425. // Find cells which needs to be expanded vertically - those on the same column or those that spans over split cell's column.
  426. const cellsToUpdate = tableMap.filter( ( { cell, cellWidth, column } ) => {
  427. const isOnSameColumn = cell !== tableCell && column === splitCellColumn;
  428. const spansOverColumn = ( column < splitCellColumn && column + cellWidth > splitCellColumn );
  429. return isOnSameColumn || spansOverColumn;
  430. } );
  431. // Expand cells vertically.
  432. for ( const { cell, cellWidth } of cellsToUpdate ) {
  433. writer.setAttribute( 'colspan', cellWidth + cellsToInsert, cell );
  434. }
  435. // Second step: create columns after split cell.
  436. // Each inserted cell will have the same attributes:
  437. const newCellsAttributes = {};
  438. // Do not store default value in the model.
  439. // Copy rowspan of split cell.
  440. if ( rowspan > 1 ) {
  441. newCellsAttributes.rowspan = rowspan;
  442. }
  443. createCells( cellsToInsert, writer, writer.createPositionAfter( tableCell ), newCellsAttributes );
  444. const headingColumns = table.getAttribute( 'headingColumns' ) || 0;
  445. // Update heading section if split cell is in heading section.
  446. if ( headingColumns > splitCellColumn ) {
  447. updateNumericAttribute( 'headingColumns', headingColumns + cellsToInsert, table, writer );
  448. }
  449. }
  450. } );
  451. }
  452. /**
  453. * Divides a table cell horizontally into several ones.
  454. *
  455. * The cell will be visually split into more cells by updating rowspans of other cells in the row and inserting rows with a single cell
  456. * below.
  457. *
  458. * If in the table below cell "b" is split into 3 cells:
  459. *
  460. * +---+---+---+
  461. * | a | b | c |
  462. * +---+---+---+
  463. * | d | e | f |
  464. * +---+---+---+
  465. *
  466. * It will result in the table below:
  467. *
  468. * +---+---+---+
  469. * | a | b | c |
  470. * + +---+ +
  471. * | | | |
  472. * + +---+ +
  473. * | | | |
  474. * +---+---+---+
  475. * | d | e | f |
  476. * +---+---+---+
  477. *
  478. * So cells "a" and "b" will get their `rowspan` updated to `3` and 2 rows with a single cell will be added.
  479. *
  480. * Splitting a cell that already has a `rowspan` attribute set will distribute the cell `rowspan` evenly and the remainder
  481. * will be left to the original cell:
  482. *
  483. * +---+---+---+
  484. * | a | b | c |
  485. * + +---+---+
  486. * | | d | e |
  487. * + +---+---+
  488. * | | f | g |
  489. * + +---+---+
  490. * | | h | i |
  491. * +---+---+---+
  492. *
  493. * Splitting cell "a" with `rowspan=4` into 3 cells will create 2 cells with a `rowspan=1` and cell "a" will have `rowspan=2`:
  494. *
  495. * +---+---+---+
  496. * | a | b | c |
  497. * + +---+---+
  498. * | | d | e |
  499. * +---+---+---+
  500. * | | f | g |
  501. * +---+---+---+
  502. * | | h | i |
  503. * +---+---+---+
  504. *
  505. * @param {module:engine/model/element~Element} tableCell
  506. * @param {Number} numberOfCells
  507. */
  508. splitCellHorizontally( tableCell, numberOfCells = 2 ) {
  509. const model = this.editor.model;
  510. const tableRow = tableCell.parent;
  511. const table = tableRow.parent;
  512. const splitCellRow = table.getChildIndex( tableRow );
  513. const rowspan = parseInt( tableCell.getAttribute( 'rowspan' ) || 1 );
  514. const colspan = parseInt( tableCell.getAttribute( 'colspan' ) || 1 );
  515. model.change( writer => {
  516. // First check - the cell spans over multiple rows so before doing anything else just split this cell.
  517. if ( rowspan > 1 ) {
  518. // Cache table map before updating table.
  519. const tableMap = [ ...new TableWalker( table, {
  520. startRow: splitCellRow,
  521. endRow: splitCellRow + rowspan - 1,
  522. includeAllSlots: true
  523. } ) ];
  524. // Get spans of new (inserted) cells and span to update of split cell.
  525. const { newCellsSpan, updatedSpan } = breakSpanEvenly( rowspan, numberOfCells );
  526. updateNumericAttribute( 'rowspan', updatedSpan, tableCell, writer );
  527. const { column: cellColumn } = tableMap.find( ( { cell } ) => cell === tableCell );
  528. // Each inserted cell will have the same attributes:
  529. const newCellsAttributes = {};
  530. // Do not store default value in the model.
  531. if ( newCellsSpan > 1 ) {
  532. newCellsAttributes.rowspan = newCellsSpan;
  533. }
  534. // Copy colspan of split cell.
  535. if ( colspan > 1 ) {
  536. newCellsAttributes.colspan = colspan;
  537. }
  538. for ( const tableSlot of tableMap ) {
  539. const { column, row } = tableSlot;
  540. // As both newly created cells and the split cell might have rowspan,
  541. // the insertion of new cells must go to appropriate rows:
  542. //
  543. // 1. It's a row after split cell + it's height.
  544. const isAfterSplitCell = row >= splitCellRow + updatedSpan;
  545. // 2. Is on the same column.
  546. const isOnSameColumn = column === cellColumn;
  547. // 3. And it's row index is after previous cell height.
  548. const isInEvenlySplitRow = ( row + splitCellRow + updatedSpan ) % newCellsSpan === 0;
  549. if ( isAfterSplitCell && isOnSameColumn && isInEvenlySplitRow ) {
  550. createCells( 1, writer, tableSlot.getPositionBefore(), newCellsAttributes );
  551. }
  552. }
  553. }
  554. // Second check - the cell has rowspan of 1 or we need to create more cells than the current cell spans over.
  555. if ( rowspan < numberOfCells ) {
  556. // We already split the cell in check one so here we split to the remaining number of cells only.
  557. const cellsToInsert = numberOfCells - rowspan;
  558. // This check is needed since we need to check if there are any cells from previous rows than spans over this cell's row.
  559. const tableMap = [ ...new TableWalker( table, { startRow: 0, endRow: splitCellRow } ) ];
  560. // First step: expand cells.
  561. for ( const { cell, cellHeight, row } of tableMap ) {
  562. // Expand rowspan of cells that are either:
  563. // - on the same row as current cell,
  564. // - or are below split cell row and overlaps that row.
  565. if ( cell !== tableCell && row + cellHeight > splitCellRow ) {
  566. const rowspanToSet = cellHeight + cellsToInsert;
  567. writer.setAttribute( 'rowspan', rowspanToSet, cell );
  568. }
  569. }
  570. // Second step: create rows with single cell below split cell.
  571. const newCellsAttributes = {};
  572. // Copy colspan of split cell.
  573. if ( colspan > 1 ) {
  574. newCellsAttributes.colspan = colspan;
  575. }
  576. createEmptyRows( writer, table, splitCellRow + 1, cellsToInsert, 1, newCellsAttributes );
  577. // Update heading section if split cell is in heading section.
  578. const headingRows = table.getAttribute( 'headingRows' ) || 0;
  579. if ( headingRows > splitCellRow ) {
  580. updateNumericAttribute( 'headingRows', headingRows + cellsToInsert, table, writer );
  581. }
  582. }
  583. } );
  584. }
  585. /**
  586. * Returns the number of columns for a given table.
  587. *
  588. * editor.plugins.get( 'TableUtils' ).getColumns( table );
  589. *
  590. * @param {module:engine/model/element~Element} table The table to analyze.
  591. * @returns {Number}
  592. */
  593. getColumns( table ) {
  594. // Analyze first row only as all the rows should have the same width.
  595. const row = table.getChild( 0 );
  596. return [ ...row.getChildren() ].reduce( ( columns, row ) => {
  597. const columnWidth = parseInt( row.getAttribute( 'colspan' ) || 1 );
  598. return columns + columnWidth;
  599. }, 0 );
  600. }
  601. /**
  602. * Returns the number of rows for a given table.
  603. *
  604. * editor.plugins.get( 'TableUtils' ).getRows( table );
  605. *
  606. * @param {module:engine/model/element~Element} table The table to analyze.
  607. * @returns {Number}
  608. */
  609. getRows( table ) {
  610. // Simple row counting, not including rowspan due to #6427.
  611. return table.childCount;
  612. }
  613. }
  614. // Creates empty rows at the given index in an existing table.
  615. //
  616. // @param {module:engine/model/writer~Writer} writer
  617. // @param {module:engine/model/element~Element} table
  618. // @param {Number} insertAt The row index of row insertion.
  619. // @param {Number} rows The number of rows to create.
  620. // @param {Number} tableCellToInsert The number of cells to insert in each row.
  621. function createEmptyRows( writer, table, insertAt, rows, tableCellToInsert, attributes = {} ) {
  622. for ( let i = 0; i < rows; i++ ) {
  623. const tableRow = writer.createElement( 'tableRow' );
  624. writer.insert( tableRow, table, insertAt );
  625. createCells( tableCellToInsert, writer, writer.createPositionAt( tableRow, 'end' ), attributes );
  626. }
  627. }
  628. // Creates cells at a given position.
  629. //
  630. // @param {Number} columns The number of columns to create
  631. // @param {module:engine/model/writer~Writer} writer
  632. // @param {module:engine/model/position~Position} insertPosition
  633. function createCells( cells, writer, insertPosition, attributes = {} ) {
  634. for ( let i = 0; i < cells; i++ ) {
  635. createEmptyTableCell( writer, insertPosition, attributes );
  636. }
  637. }
  638. // Evenly distributes the span of a cell to a number of provided cells.
  639. // The resulting spans will always be integer values.
  640. //
  641. // For instance breaking a span of 7 into 3 cells will return:
  642. //
  643. // { newCellsSpan: 2, updatedSpan: 3 }
  644. //
  645. // as two cells will have a span of 2 and the remainder will go the first cell so its span will change to 3.
  646. //
  647. // @param {Number} span The span value do break.
  648. // @param {Number} numberOfCells The number of resulting spans.
  649. // @returns {{newCellsSpan: Number, updatedSpan: Number}}
  650. function breakSpanEvenly( span, numberOfCells ) {
  651. if ( span < numberOfCells ) {
  652. return { newCellsSpan: 1, updatedSpan: 1 };
  653. }
  654. const newCellsSpan = Math.floor( span / numberOfCells );
  655. const updatedSpan = ( span - newCellsSpan * numberOfCells ) + newCellsSpan;
  656. return { newCellsSpan, updatedSpan };
  657. }
  658. // Updates heading columns attribute if removing a row from head section.
  659. function adjustHeadingColumns( table, removedColumnIndexes, writer ) {
  660. const headingColumns = table.getAttribute( 'headingColumns' ) || 0;
  661. if ( headingColumns && removedColumnIndexes.first < headingColumns ) {
  662. const headingsRemoved = Math.min( headingColumns - 1 /* Other numbers are 0-based */, removedColumnIndexes.last ) -
  663. removedColumnIndexes.first + 1;
  664. writer.setAttribute( 'headingColumns', headingColumns - headingsRemoved, table );
  665. }
  666. }
  667. // Calculates a new heading rows value for removing rows from heading section.
  668. function updateHeadingRows( table, first, last, model, batch ) {
  669. // Must be done after the changes in table structure (removing rows).
  670. // Otherwise the downcast converter for headingRows attribute will fail.
  671. // See https://github.com/ckeditor/ckeditor5/issues/6391.
  672. //
  673. // Must be completely wrapped in enqueueChange to get the current table state (after applying other enqueued changes).
  674. model.enqueueChange( batch, writer => {
  675. const headingRows = table.getAttribute( 'headingRows' ) || 0;
  676. if ( first < headingRows ) {
  677. const newRows = last < headingRows ? headingRows - ( last - first + 1 ) : first;
  678. updateNumericAttribute( 'headingRows', newRows, table, writer, 0 );
  679. }
  680. } );
  681. }
  682. // Finds cells that will be:
  683. // - trimmed - Cells that are "above" removed rows sections and overlap the removed section - their rowspan must be trimmed.
  684. // - moved - Cells from removed rows section might stick out of. These cells are moved to the next row after a removed section.
  685. //
  686. // Sample table with overlapping & sticking out cells:
  687. //
  688. // +----+----+----+----+----+
  689. // | 00 | 01 | 02 | 03 | 04 |
  690. // +----+ + + + +
  691. // | 10 | | | | |
  692. // +----+----+ + + +
  693. // | 20 | 21 | | | | <-- removed row
  694. // + + +----+ + +
  695. // | | | 32 | | | <-- removed row
  696. // +----+ + +----+ +
  697. // | 40 | | | 43 | |
  698. // +----+----+----+----+----+
  699. //
  700. // In a table above:
  701. // - cells to trim: '02', '03' & '04'.
  702. // - cells to move: '21' & '32'.
  703. function getCellsToMoveAndTrimOnRemoveRow( table, first, last ) {
  704. const cellsToMove = new Map();
  705. const cellsToTrim = [];
  706. for ( const { row, column, cellHeight, cell } of new TableWalker( table, { endRow: last } ) ) {
  707. const lastRowOfCell = row + cellHeight - 1;
  708. const isCellStickingOutFromRemovedRows = row >= first && row <= last && lastRowOfCell > last;
  709. if ( isCellStickingOutFromRemovedRows ) {
  710. const rowspanInRemovedSection = last - row + 1;
  711. const rowSpanToSet = cellHeight - rowspanInRemovedSection;
  712. cellsToMove.set( column, {
  713. cell,
  714. rowspan: rowSpanToSet
  715. } );
  716. }
  717. const isCellOverlappingRemovedRows = row < first && lastRowOfCell >= first;
  718. if ( isCellOverlappingRemovedRows ) {
  719. let rowspanAdjustment;
  720. // Cell fully covers removed section - trim it by removed rows count.
  721. if ( lastRowOfCell >= last ) {
  722. rowspanAdjustment = last - first + 1;
  723. }
  724. // Cell partially overlaps removed section - calculate cell's span that is in removed section.
  725. else {
  726. rowspanAdjustment = lastRowOfCell - first + 1;
  727. }
  728. cellsToTrim.push( {
  729. cell,
  730. rowspan: cellHeight - rowspanAdjustment
  731. } );
  732. }
  733. }
  734. return { cellsToMove, cellsToTrim };
  735. }
  736. function moveCellsToRow( table, targetRowIndex, cellsToMove, writer ) {
  737. const tableWalker = new TableWalker( table, {
  738. includeAllSlots: true,
  739. row: targetRowIndex
  740. } );
  741. const tableRowMap = [ ...tableWalker ];
  742. const row = table.getChild( targetRowIndex );
  743. let previousCell;
  744. for ( const { column, cell, isAnchor } of tableRowMap ) {
  745. if ( cellsToMove.has( column ) ) {
  746. const { cell: cellToMove, rowspan } = cellsToMove.get( column );
  747. const targetPosition = previousCell ?
  748. writer.createPositionAfter( previousCell ) :
  749. writer.createPositionAt( row, 0 );
  750. writer.move( writer.createRangeOn( cellToMove ), targetPosition );
  751. updateNumericAttribute( 'rowspan', rowspan, cellToMove, writer );
  752. previousCell = cellToMove;
  753. } else if ( isAnchor ) {
  754. // If cell is spanned then `cell` holds reference to overlapping cell. See ckeditor/ckeditor5#6502.
  755. previousCell = cell;
  756. }
  757. }
  758. }