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