lpoptions -l

PageSize/Media Size: Executive Letter Legal 8x10 Statement *A4 B5 Postcard A6 4x6 5x8 Env10 EnvDL EnvC5 EnvC6 EnvA2 EnvChou3 4.4x6 5x7 DoublePostcardRotated ISOB5 FanFoldGermanLegal 3.936x5.75 8.5x14
MediaType/Media Type: *Stationery PhotographicGlossy
ColorModel/Color Mode: *RGB Gray
cupsPrintQuality/Print Quality: Draft *Normal High

Size PrinterJob::GetDefaultPageSize(String *name)
{
	Size sz(6000 * 210 / 254, 6000 * 297 / 254);

	Vector<String> dpp = Split(System("lpoptions -l"), '\n');

	for (int i = 0; i < dpp.GetCount(); i++){
		int pos = max(dpp[i].FindAfter("Page Size"), dpp[i].FindAfter("PageSize"));
		if (pos >= 0){
			pos = dpp[i].Find('*', pos);
			//return A4 if there is not default page size
			if (pos < 0) return sz;
			//skip '*'
			pos++;
			int len = dpp[i].Find(' ', pos);
			if (len < 0) len = dpp[i].GetLength();
			len -= pos;
			//page name
			String nm = dpp[i].Mid(pos, len);
			if(name)
				*name = nm;
			const PageSizeName *p = FindPageSize(nm);
			if(p) {
				sz = p->GetDots();
				return sz;
			}
		}
	}
	//return A4 if there is not default page size
	return sz;
}