forked from sheetjs/sheetjs
103 lines
3.1 KiB
JavaScript
103 lines
3.1 KiB
JavaScript
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var _chr = function(c) { return String.fromCharCode(c); };
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function encode_col(col) { var s=""; for(++col; col; col=Math.floor((col-1)/26)) s = _chr(((col-1)%26) + 65) + s; return s; }
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function encode_row(row) { return "" + (row + 1); }
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function encode_cell(cell) { return encode_col(cell.c) + encode_row(cell.r); }
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function decode_col(c) { var d = 0, i = 0; for(; i !== c.length; ++i) d = 26*d + c.charCodeAt(i) - 64; return d - 1; }
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function decode_row(rowstr) { return Number(rowstr) - 1; }
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function split_cell(cstr) { return cstr.replace(/(\$?[A-Z]*)(\$?[0-9]*)/,"$1,$2").split(","); }
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function decode_cell(cstr) { var splt = split_cell(cstr); return { c:decode_col(splt[0]), r:decode_row(splt[1]) }; }
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function decode_range(range) { var x =range.split(":").map(decode_cell); return {s:x[0],e:x[x.length-1]}; }
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function encode_range(range) { return encode_cell(range.s) + ":" + encode_cell(range.e); }
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/**
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* Convert a sheet into an array of objects where the column headers are keys.
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**/
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function sheet_to_row_object_array(sheet){
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var val, rowObject, range, columnHeaders, emptyRow, C;
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var outSheet = [];
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if (sheet["!ref"]) {
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range = decode_range(sheet["!ref"]);
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columnHeaders = {};
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for (C = range.s.c; C <= range.e.c; ++C) {
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val = sheet[encode_cell({
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c: C,
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r: range.s.r
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})];
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if(val){
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switch(val.t) {
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case 's': case 'str': columnHeaders[C] = val.v; break;
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case 'n': columnHeaders[C] = val.v; break;
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}
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}
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}
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for (var R = range.s.r + 1; R <= range.e.r; ++R) {
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emptyRow = true;
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//Row number is recorded in the prototype
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//so that it doesn't appear when stringified.
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rowObject = Object.create({ __rowNum__ : R });
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for (C = range.s.c; C <= range.e.c; ++C) {
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val = sheet[encode_cell({
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c: C,
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r: R
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})];
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if(val !== undefined) switch(val.t){
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case 's': case 'str': case 'b': case 'n':
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if(val.v !== undefined) {
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rowObject[columnHeaders[C]] = val.v;
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emptyRow = false;
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}
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break;
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case 'e': break; /* thorw */
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default: throw 'unrecognized type ' + val.t;
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}
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}
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if(!emptyRow) {
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outSheet.push(rowObject);
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}
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}
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}
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return outSheet;
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}
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function sheet_to_csv(sheet) {
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var stringify = function stringify(val) {
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switch(val.t){
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case 'n': return val.v;
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case 's': case 'str': return JSON.stringify(val.v);
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case 'b': return val.v ? "TRUE" : "FALSE";
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case 'e': return ""; /* throw out value in case of error */
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default: throw 'unrecognized type ' + val.t;
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}
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};
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var out = "";
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if(sheet["!ref"]) {
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var r = utils.decode_range(sheet["!ref"]);
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for(var R = r.s.r; R <= r.e.r; ++R) {
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var row = [];
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for(var C = r.s.c; C <= r.e.c; ++C) {
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var val = sheet[utils.encode_cell({c:C,r:R})];
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row.push(val ? stringify(val) : "");
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}
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out += row.join(",") + "\n";
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}
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}
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return out;
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}
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var utils = {
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encode_col: encode_col,
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encode_row: encode_row,
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encode_cell: encode_cell,
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encode_range: encode_range,
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decode_col: decode_col,
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decode_row: decode_row,
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split_cell: split_cell,
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decode_cell: decode_cell,
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decode_range: decode_range,
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sheet_to_csv: sheet_to_csv,
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sheet_to_row_object_array: sheet_to_row_object_array
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};
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