xsheetjs/bits/90_utils.js
SheetJS ecee362e00 version bump 0.5.10-a: xlsx performance
- utf8 translation pushes to array rather than string concat
- large_strings test actually runs now (rather than blowing up)
2014-02-22 16:36:28 -05:00

117 lines
3.8 KiB
JavaScript

var _chr = function(c) { return String.fromCharCode(c); };
function encode_col(col) { var s=""; for(++col; col; col=Math.floor((col-1)/26)) s = _chr(((col-1)%26) + 65) + s; return s; }
function encode_row(row) { return "" + (row + 1); }
function encode_cell(cell) { return encode_col(cell.c) + encode_row(cell.r); }
function decode_col(c) { var d = 0, i = 0; for(; i !== c.length; ++i) d = 26*d + c.charCodeAt(i) - 64; return d - 1; }
function decode_row(rowstr) { return Number(rowstr) - 1; }
function split_cell(cstr) { return cstr.replace(/(\$?[A-Z]*)(\$?[0-9]*)/,"$1,$2").split(","); }
function decode_cell(cstr) { var splt = split_cell(cstr); return { c:decode_col(splt[0]), r:decode_row(splt[1]) }; }
function decode_range(range) { var x =range.split(":").map(decode_cell); return {s:x[0],e:x[x.length-1]}; }
function encode_range(range) { return encode_cell(range.s) + ":" + encode_cell(range.e); }
function sheet_to_row_object_array(sheet, opts){
var val, row, r, hdr = {}, isempty, R, C;
var out = [];
opts = opts || {};
if(!sheet || !sheet["!ref"]) return out;
r = XLSX.utils.decode_range(sheet["!ref"]);
for(R=r.s.r, C = r.s.c; C <= r.e.c; ++C) {
val = sheet[encode_cell({c:C,r:R})];
if(!val) continue;
if(val.w) hdr[C] = val.w;
else switch(val.t) {
case 's': case 'str': hdr[C] = val.v; break;
case 'n': hdr[C] = val.v; break;
}
}
for (R = r.s.r + 1; R <= r.e.r; ++R) {
isempty = true;
/* row index available as __rowNum__ */
row = Object.create({ __rowNum__ : R });
for (C = r.s.c; C <= r.e.c; ++C) {
val = sheet[encode_cell({c: C,r: R})];
if(!val || !val.t) continue;
if(typeof val.w !== 'undefined' && !opts.raw) { row[hdr[C]] = val.w; isempty = false; }
else switch(val.t){
case 's': case 'str': case 'b': case 'n':
if(typeof val.v !== 'undefined') {
row[hdr[C]] = val.v;
isempty = false;
}
break;
case 'e': break; /* throw */
default: throw 'unrecognized type ' + val.t;
}
}
if(!isempty) out.push(row);
}
return out;
}
function sheet_to_csv(sheet, opts) {
var stringify = function stringify(val) {
if(!val.t) return "";
if(typeof val.w !== 'undefined') return val.w;
switch(val.t){
case 'n': return String(val.v);
case 's': case 'str': return typeof val.v !== 'undefined' ? val.v : "";
case 'b': return val.v ? "TRUE" : "FALSE";
case 'e': return val.v; /* throw out value in case of error */
default: throw 'unrecognized type ' + val.t;
}
};
var out = [], txt = "";
opts = opts || {};
if(!sheet || !sheet["!ref"]) return "";
var r = XLSX.utils.decode_range(sheet["!ref"]);
var fs = opts.FS||",", rs = opts.RS||"\n";
for(var R = r.s.r; R <= r.e.r; ++R) {
var row = [];
for(var C = r.s.c; C <= r.e.c; ++C) {
var val = sheet[XLSX.utils.encode_cell({c:C,r:R})];
if(!val) { row.push(""); continue; }
txt = String(stringify(val));
if(txt.indexOf(fs)!==-1 || txt.indexOf(rs)!==-1 || txt.indexOf('"')!==-1)
txt = "\"" + txt.replace(/"/g, '""') + "\"";
row.push(txt);
}
out.push(row.join(fs));
}
return out.join(rs) + (out.length ? rs : "");
}
var make_csv = sheet_to_csv;
function get_formulae(ws) {
var cmds = [];
for(var y in ws) if(y[0] !=='!' && ws.hasOwnProperty(y)) {
var x = ws[y];
var val = "";
if(x.f) val = x.f;
else if(typeof x.w !== 'undefined') val = "'" + x.w;
else if(typeof x.v === 'undefined') continue;
else val = x.v;
cmds.push(y + "=" + val);
}
return cmds;
}
XLSX.utils = {
encode_col: encode_col,
encode_row: encode_row,
encode_cell: encode_cell,
encode_range: encode_range,
decode_col: decode_col,
decode_row: decode_row,
split_cell: split_cell,
decode_cell: decode_cell,
decode_range: decode_range,
sheet_to_csv: sheet_to_csv,
make_csv: sheet_to_csv,
get_formulae: get_formulae,
sheet_to_row_object_array: sheet_to_row_object_array
};