version bump 0.16.6: xlfn option

Author: SheetJSDev

README.md

@@ -1685,6 +1685,7 @@ The exported `read` and `readFile` functions accept an options argument:
 |`WTF`        | false   | If true, throw errors on unexpected file features ** |
 |`sheets`     |         | If specified, only parse specified sheets **         |
 |`PRN`        | false   | If true, allow parsing of PRN files **               |
+|`xlfn`       | false   | If true, preserve `_xlfn.` prefixes in formulae **   |
 
 - Even if `cellNF` is false, formatted text will be generated and saved to `.w`
 - In some cases, sheets may be parsed even if `bookSheets` is false.
@@ -1711,6 +1712,8 @@ The exported `read` and `readFile` functions accept an options argument:
 - `PRN` affects parsing of text files without a common delimiter character.
 - Currently only XOR encryption is supported.  Unsupported error will be thrown
   for files employing other encryption methods.
+- Newer Excel functions are serialized with the `_xlfn.` prefix, hidden from the
+  user. SheetJS will strip `_xlfn.` normally. The `xlfn` option preserves them.
 - WTF is mainly for development.  By default, the parser will suppress read
   errors on single worksheets, allowing you to read from the worksheets that do
   parse properly. Setting `WTF:true` forces those errors to be thrown.

bits/01_version.js

@@ -1 +1 @@
-XLSX.version = '0.16.5';
+XLSX.version = '0.16.6';

bits/67_wsxml.js

@@ -352,14 +352,17 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th
 			if(opts.cellFormula) {
 				if((cref=d.match(match_f))!= null && /*::cref != null && */cref[1] !== '') {
 					/* TODO: match against XLSXFutureFunctions */
-					p.f=_xlfn(unescapexml(utf8read(cref[1])));
+					p.f=unescapexml(utf8read(cref[1]));
+					if(!opts.xlfn) p.f = _xlfn(p.f);
 					if(/*::cref != null && cref[0] != null && */cref[0].indexOf('t="array"') > -1) {
 						p.F = (d.match(refregex)||[])[1];
 						if(p.F.indexOf(":") > -1) arrayf.push([safe_decode_range(p.F), p.F]);
 					} else if(/*::cref != null && cref[0] != null && */cref[0].indexOf('t="shared"') > -1) {
 						// TODO: parse formula
 						ftag = parsexmltag(cref[0]);
-						sharedf[parseInt(ftag.si, 10)] = [ftag, _xlfn(unescapexml(utf8read(cref[1]))), tag.r];
+						var ___f = unescapexml(utf8read(cref[1]));
+						if(!opts.xlfn) ___f = _xlfn(___f);
+						sharedf[parseInt(ftag.si, 10)] = [ftag, ___f, tag.r];
 					}
 				} else if((cref=d.match(/<f[^>]*\/>/))) {
 					ftag = parsexmltag(cref[0]);