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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 | 1x 43x 87x 43x 87x 43x 120x 119x 43x 120x 119x 43x 70x 70x 46x 5x 41x 70x 70x 70x 46x 5x 41x 70x | import type { ReadonlyContentModelTableRow } from 'roosterjs-content-model-types';
/**
* @internal
*/
export function canMergeCells(
rows: ReadonlyContentModelTableRow[],
firstRow: number,
firstCol: number,
lastRow: number,
lastCol: number
): boolean {
const noSpanAbove =
firstCol == lastCol ||
rows[firstRow].cells.every(
(cell, colIndex) => colIndex < firstCol || colIndex > lastCol || !cell.spanAbove
);
const noSpanLeft =
firstRow == lastRow ||
rows.every(
(row, rowIndex) =>
rowIndex < firstRow || rowIndex > lastRow || !row.cells[firstCol].spanLeft
);
const noDifferentBelowSpan = rows[lastRow].cells
.map((_, colIndex) =>
colIndex >= firstCol && colIndex <= lastCol
? getBelowSpanCount(rows, lastRow, colIndex)
: -1
)
.every((x, _, a) => x < 0 || x == a[firstCol]);
const noDifferentRightSpan = rows
.map((_, rowIndex) =>
rowIndex >= firstRow && rowIndex <= lastRow
? getRightSpanCount(rows, rowIndex, lastCol)
: -1
)
.every((x, _, a) => x < 0 || x == a[firstRow]);
return noSpanAbove && noSpanLeft && noDifferentBelowSpan && noDifferentRightSpan;
}
function getBelowSpanCount(
rows: ReadonlyContentModelTableRow[],
rowIndex: number,
colIndex: number
) {
let spanCount = 0;
for (let row = rowIndex + 1; row < rows.length; row++) {
if (rows[row]?.cells[colIndex]?.spanAbove) {
spanCount++;
} else {
break;
}
}
return spanCount;
}
function getRightSpanCount(
rows: ReadonlyContentModelTableRow[],
rowIndex: number,
colIndex: number
) {
let spanCount = 0;
for (let col = colIndex + 1; col < rows[rowIndex]?.cells.length; col++) {
if (rows[rowIndex]?.cells[col]?.spanLeft) {
spanCount++;
} else {
break;
}
}
return spanCount;
}
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