@visactor/vtable
Version:
canvas table width high performance
33 lines (32 loc) • 1.59 kB
JavaScript
export function fixUpdateRowRange(diffPositions, col, row, table) {
const updateCells = [ {
col: col,
row: row
} ], addCells = [], removeCells = [], {addCellPositions: addCellPositions, removeCellPositions: removeCellPositions} = diffPositions, proxy = table.scenegraph.proxy, {rowStart: rowStart, rowLimit: rowLimit} = proxy;
let {rowEnd: rowEnd} = proxy, updateRow = 1 / 0;
for (let i = 0; i < addCellPositions.length; i++) {
const {row: cellRow} = addCellPositions[i];
rowEnd - rowStart + 1 === rowLimit ? cellRow >= rowStart && cellRow <= rowEnd && (updateRow = Math.min(updateRow, cellRow)) : (addCells.push({
col: col,
row: cellRow
}), rowEnd++);
}
const newRowEnd = Math.min(rowStart + rowLimit, table.rowCount - 1 - table.bottomFrozenRowCount), notFullRow = newRowEnd < rowStart + rowLimit;
for (let i = 0; i < removeCellPositions.length; i++) {
const {row: cellRow} = removeCellPositions[removeCellPositions.length - i - 1];
cellRow < rowStart || cellRow > rowEnd || (cellRow > newRowEnd || notFullRow ? (removeCells.push({
col: col,
row: cellRow
}), updateRow--) : updateRow = Math.min(updateRow, cellRow));
}
if (updateRow !== 1 / 0) for (let i = updateRow; i <= rowEnd; i++) updateCells.push({
col: col,
row: i
});
return table.scenegraph.proxy.refreshRowCount(), {
updateCells: updateCells,
addCells: addCells,
removeCells: removeCells
};
}
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