xsheetjs/bits/97_node.js
SheetJS 51182e57ef version bump 0.9.10: nodejs performance
- xlsx.njs use dense mode by default
- CSV Streaming output for nodejs
- XLSX/XLSB error on password protected documents
- record hoppers switch on record number rather than name
2017-04-09 00:04:46 -04:00

55 lines
1.8 KiB
JavaScript

if(has_buf && typeof require != 'undefined') (function() {
var Readable = require('stream').Readable;
var write_csv_stream = function(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/) {
var stream = Readable();
var out = "", txt = "", qreg = /"/g;
var o = opts == null ? {} : opts;
if(sheet == null || sheet["!ref"] == null) { stream.push(null); return stream; }
var r = safe_decode_range(sheet["!ref"]);
var FS = o.FS !== undefined ? o.FS : ",", fs = FS.charCodeAt(0);
var RS = o.RS !== undefined ? o.RS : "\n", rs = RS.charCodeAt(0);
var endregex = new RegExp((FS=="|" ? "\\|" : FS)+"+$");
var row = "", rr = "", cols = [];
var i = 0, cc = 0, val;
var R = 0, C = 0;
var dense = Array.isArray(sheet);
for(C = r.s.c; C <= r.e.c; ++C) cols[C] = encode_col(C);
R = r.s.r;
stream._read = function() {
if(R > r.e.r) return stream.push(null);
while(true) {
var isempty = true;
row = "";
rr = encode_row(R);
for(C = r.s.c; C <= r.e.c; ++C) {
val = dense ? (sheet[R]||[])[C]: sheet[cols[C] + rr];
if(val == null) txt = "";
else if(val.v != null) {
isempty = false;
txt = ''+format_cell(val, null, o);
for(i = 0, cc = 0; i !== txt.length; ++i) if((cc = txt.charCodeAt(i)) === fs || cc === rs || cc === 34) {
txt = "\"" + txt.replace(qreg, '""') + "\""; break; }
} else if(val.f != null && !val.F) {
isempty = false;
txt = '=' + val.f; if(txt.indexOf(",") >= 0) txt = '"' + txt.replace(qreg, '""') + '"';
} else txt = "";
/* NOTE: Excel CSV does not support array formulae */
row += (C === r.s.c ? "" : FS) + txt;
}
if(o.blankrows === false && isempty) { ++R; continue; }
if(o.strip) row = row.replace(endregex,"");
stream.push(row + RS);
++R;
break;
}
};
return stream;
};
XLSX.stream = {
to_csv: write_csv_stream
};
})();