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import { createTable } from '../../modelApi/creators/createTable';
import { createTableCell } from '../../modelApi/creators/createTableCell';
import { getBoundingClientRect } from '../utils/getBoundingClientRect';
import { getSelectionRootNode } from '../../domUtils/selection/getSelectionRootNode';
import { isElementOfType } from '../../domUtils/isElementOfType';
import { isNodeOfType } from '../../domUtils/isNodeOfType';
import { parseFormat } from '../utils/parseFormat';
import { parseValueWithUnit } from '../../formatHandlers/utils/parseValueWithUnit';
import { stackFormat } from '../utils/stackFormat';
import type {
ContentModelTableCellFormat,
DatasetFormat,
DomToModelContext,
ElementProcessor,
SizeFormat,
} from 'roosterjs-content-model-types';
/**
* Content Model Element Processor for table
*
* For Table with merged/splitted cells, HTML uses colSpan and rowSpan attributes to specify how it should be rendered.
* To make it easier to edit a table, we will use a different way to describe table.
*
* 1. For a m * n table (m rows, n columns), we always create a m * n array for the cells.
* 2. For a regular table cell, it is mapped to one item of this array
* 3. For a merged/splitted table cell, it will has colSpan/rowSpan value. We also created TableCell model for those spanned
* cells, and use "spanLeft" and "spanAbove" to mark its state
* 4. When edit table, we always edit on this mapped m * n array because it always has an item for each cell
* 5. When write back to DOM, we create TD/TH elements for those non-spanned cells, and mark its colSpan/rowSpan value according
* its neighbour cell's spanLeft/spanAbove attribute
* @param group The parent block group
* @param parent Parent DOM node to process
* @param context DOM to Content Model context
*/
export const tableProcessor: ElementProcessor<HTMLTableElement> = (
group,
tableElement,
context
) => {
stackFormat(
context,
{ segment: 'shallowCloneForBlock', paragraph: 'shallowCloneForGroup' },
() => {
parseFormat(tableElement, context.formatParsers.block, context.blockFormat, context);
const table = createTable(tableElement.rows.length, context.blockFormat);
const tableSelection = context.selection?.type == 'table' ? context.selection : null;
const selectedTable = tableSelection?.table;
const hasTableSelection = selectedTable == tableElement;
const recalculateTableSize = shouldRecalculateTableSize(tableElement, context);
if (context.allowCacheElement) {
table.cachedElement = tableElement;
}
context.domIndexer?.onTable(tableElement, table);
parseFormat(tableElement, context.formatParsers.table, table.format, context);
parseFormat(tableElement, context.formatParsers.tableBorder, table.format, context);
parseFormat(
tableElement,
context.formatParsers.segmentOnBlock,
context.segmentFormat,
context
);
parseFormat(tableElement, context.formatParsers.dataset, table.dataset, context);
addBlock(group, table);
const columnPositions: (number | undefined)[] = [0];
const hasColGroup = processColGroup(tableElement, context, columnPositions);
const rowPositions: number[] = [0];
const zoomScale = context.zoomScale || 1;
let maxColumns = 0;
for (let row = 0; row < tableElement.rows.length; row++) {
const tr = tableElement.rows[row];
const tableRow = table.rows[row];
const tbody = tr.parentNode;
if (
isNodeOfType(tbody, 'ELEMENT_NODE') &&
(isElementOfType(tbody, 'tbody') ||
isElementOfType(tbody, 'thead') ||
isElementOfType(tbody, 'tfoot'))
) {
parseFormat(tbody, context.formatParsers.tableRow, tableRow.format, context);
} else Iif (context.allowCacheElement) {
tableRow.cachedElement = tr;
}
parseFormat(tr, context.formatParsers.tableRow, tableRow.format, context);
stackFormat(context, { paragraph: 'shallowClone', segment: 'shallowClone' }, () => {
const parent = tr.parentElement;
const isInTableSection = parent && getIsInTableSection(parent);
if (isInTableSection) {
// If there is TBODY around TR, retrieve format from TBODY first, in case some format are declared there
parseFormat(
parent,
context.formatParsers.block,
context.blockFormat,
context
);
parseFormat(
parent,
context.formatParsers.segmentOnBlock,
context.segmentFormat,
context
);
}
parseFormat(tr, context.formatParsers.block, context.blockFormat, context);
parseFormat(
tr,
context.formatParsers.segmentOnBlock,
context.segmentFormat,
context
);
tableRow.height = parseInt(tr.style.height) || 0;
for (
let sourceCol = 0, targetCol = 0;
sourceCol < tr.cells.length;
sourceCol++
) {
for (; tableRow.cells[targetCol]; targetCol++) {}
const td = tr.cells[sourceCol];
const hasSelectionBeforeCell = context.isInSelection;
if (recalculateTableSize) {
const colEnd = targetCol + td.colSpan;
const rowEnd = row + td.rowSpan;
const needCalcWidth = columnPositions[colEnd] === undefined;
const needCalcHeight = rowPositions[rowEnd] === undefined;
if (needCalcWidth || needCalcHeight) {
const rect = getBoundingClientRect(td);
Eif (rect.width > 0 || rect.height > 0) {
if (needCalcWidth) {
const pos = columnPositions[targetCol];
columnPositions[colEnd] =
(typeof pos == 'number' ? pos : 0) +
rect.width / zoomScale;
}
if (needCalcHeight) {
rowPositions[rowEnd] =
rowPositions[row] + rect.height / zoomScale;
}
}
}
}
stackFormat(
context,
{ paragraph: 'shallowClone', segment: 'shallowClone' },
() => {
parseFormat(
td,
context.formatParsers.block,
context.blockFormat,
context
);
parseFormat(
td,
context.formatParsers.segmentOnTableCell,
context.segmentFormat,
context
);
const cellFormat: ContentModelTableCellFormat = {
...context.blockFormat,
};
const dataset: DatasetFormat = {};
parseFormat(
td,
context.formatParsers.tableCell,
cellFormat,
context
);
parseFormat(
td,
context.formatParsers.tableBorder,
cellFormat,
context
);
parseFormat(td, context.formatParsers.dataset, dataset, context);
for (
let colSpan = 1;
colSpan <= (td.colSpan == 0 ? 1 : td.colSpan);
colSpan++, targetCol++
) {
for (
let rowSpan = 1;
// RowSpan of 0 means it should span to the end of the table
// https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/td#rowspan
rowSpan <=
(td.rowSpan == 0
? isInTableSection
? translateRowSpanZero(parent, td)
: 1
: td.rowSpan);
rowSpan++
) {
const hasTd = colSpan == 1 && rowSpan == 1;
const cell = createTableCell(
colSpan > 1,
rowSpan > 1,
td.tagName == 'TH',
cellFormat
);
cell.dataset = { ...dataset };
const spannedRow = table.rows[row + rowSpan - 1];
Eif (spannedRow) {
spannedRow.cells[targetCol] = cell;
}
if (hasTd) {
// When there is COLGROUP, width on table cell should be ignored, so we should not cache the table cell,
// and always recreate it when write back using the table formats
if (context.allowCacheElement && !hasColGroup) {
cell.cachedElement = td;
}
const { listParent, levels } = context.listFormat;
context.listFormat.listParent = undefined;
context.listFormat.levels = [];
try {
context.elementProcessors.child(cell, td, context);
} finally {
context.listFormat.listParent = listParent;
context.listFormat.levels = levels;
}
}
const hasSelectionAfterCell = context.isInSelection;
if (
(hasSelectionBeforeCell && hasSelectionAfterCell) ||
(hasTableSelection &&
tableSelection &&
row >= tableSelection.firstRow &&
row <= tableSelection.lastRow &&
targetCol >= tableSelection.firstColumn &&
targetCol <= tableSelection.lastColumn)
) {
cell.isSelected = true;
}
}
}
}
);
}
});
for (let col = 0; col < tableRow.cells.length; col++) {
Iif (!tableRow.cells[col]) {
tableRow.cells[col] = createTableCell(
false,
false,
false,
context.blockFormat
);
}
}
maxColumns = Math.max(maxColumns, tableRow.cells.length);
}
table.widths = calcSizes(columnPositions);
const heights = calcSizes(rowPositions);
for (let i = 0; i < table.rows.length; i++) {
const row = table.rows[i];
const currentLength = row.cells.length;
if (currentLength > 0 && currentLength < maxColumns) {
const lastCell = row.cells[currentLength - 1];
for (let col = currentLength; col < maxColumns; col++) {
const spanCell = createTableCell(
true, // spanLeft
false,
lastCell.isHeader,
lastCell.format
);
spanCell.dataset = { ...lastCell.dataset };
row.cells[col] = spanCell;
}
}
if (heights[i] > 0) {
row.height = heights[i];
}
}
}
);
};
function translateRowSpanZero(parent: HTMLTableSectionElement, td: HTMLTableCellElement) {
const amountOfRows = parent.rows.length;
let tdIndex = -1;
for (let i = 0; i < parent.rows.length; i++) {
const row = parent.rows[i];
for (let j = 0; j < row.cells.length; j++) {
if (row.cells[j] === td) {
tdIndex = i;
break;
}
}
if (tdIndex !== -1) {
break;
}
}
return amountOfRows - tdIndex;
}
function calcSizes(positions: (number | undefined)[]): number[] {
const result: number[] = [];
let lastPos = 0;
for (let i = positions.length - 1; i >= 0; i--) {
const pos = positions[i];
Eif (typeof pos == 'number') {
lastPos = pos;
break;
}
}
for (let i = positions.length - 2; i >= 0; i--) {
const pos = positions[i];
if (pos === undefined) {
result[i] = 0;
} else {
result[i] = lastPos - pos;
lastPos = pos;
}
}
return result;
}
function processColGroup(
table: HTMLElement,
context: DomToModelContext,
result: (number | undefined)[]
): boolean {
let lastPos = 0;
let hasColGroup = false;
for (let child = table.firstChild; child; child = child.nextSibling) {
if (isNodeOfType(child, 'ELEMENT_NODE') && child.tagName == 'COLGROUP') {
hasColGroup = true;
for (let col = child.firstChild; col; col = col.nextSibling) {
if (isNodeOfType(col, 'ELEMENT_NODE') && col.tagName == 'COL') {
const colFormat: SizeFormat = {};
parseFormat(col, context.formatParsers.tableColumn, colFormat, context);
for (let i = 0; i < parseInt(col.getAttribute('span') ?? '1'); i++) {
Iif (colFormat.width === undefined) {
result.push(undefined);
} else {
const width = parseValueWithUnit(
colFormat.width ?? '',
undefined /*element*/,
'px'
);
result.push(width + lastPos);
lastPos += width;
}
}
}
}
}
}
return hasColGroup;
}
function shouldRecalculateTableSize(table: HTMLTableElement, context: DomToModelContext): boolean {
switch (context.recalculateTableSize) {
case true:
case 'all':
return true;
case 'selected':
const selectionRoot = getSelectionRootNode(context.selection);
return (
!!selectionRoot &&
(selectionRoot == table ||
table.contains(selectionRoot) ||
selectionRoot.contains(table))
);
default:
return false;
}
}
function getIsInTableSection(element: HTMLElement): element is HTMLTableSectionElement {
return (
isElementOfType(element, 'tbody') ||
isElementOfType(element, 'thead') ||
isElementOfType(element, 'tfoot')
);
}
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