exceljs
Version:
Excel Workbook Manager - Read and Write xlsx and csv Files.
57 lines (49 loc) • 1.74 kB
JavaScript
const _ = require('../../../utils/under-dash');
const Range = require('../../../doc/range');
const colCache = require('../../../utils/col-cache');
const Enums = require('../../../doc/enums');
class Merges {
constructor() {
// optional mergeCells is array of ranges (like the xml)
this.merges = {};
}
add(merge) {
// merge is {address, master}
if (this.merges[merge.master]) {
this.merges[merge.master].expandToAddress(merge.address);
} else {
const range = `${merge.master}:${merge.address}`;
this.merges[merge.master] = new Range(range);
}
}
get mergeCells() {
return _.map(this.merges, merge => merge.range);
}
reconcile(mergeCells, rows) {
// reconcile merge list with merge cells
_.each(mergeCells, merge => {
const dimensions = colCache.decode(merge);
for (let i = dimensions.top; i <= dimensions.bottom; i++) {
const row = rows[i - 1];
for (let j = dimensions.left; j <= dimensions.right; j++) {
const cell = row.cells[j - 1];
if (!cell) {
// nulls are not included in document - so if master cell has no value - add a null one here
row.cells[j] = {
type: Enums.ValueType.Null,
address: colCache.encodeAddress(i, j),
};
} else if (cell.type === Enums.ValueType.Merge) {
cell.master = dimensions.tl;
}
}
}
});
}
getMasterAddress(address) {
// if address has been merged, return its master's address. Assumes reconcile has been called
const range = this.hash[address];
return range && range.tl;
}
}
module.exports = Merges;