xsheetjs/xlsx.js
2013-10-10 02:44:16 -04:00

430 lines
13 KiB
JavaScript

/* vim: set ts=2:*/
/*jshint eqnull:true */
var XLSX = (function(){
var debug = 0;
var ct2type = {
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml": "workbooks",
"application/vnd.openxmlformats-package.core-properties+xml": "coreprops",
"application/vnd.openxmlformats-officedocument.extended-properties+xml": "extprops",
"application/vnd.openxmlformats-officedocument.spreadsheetml.calcChain+xml": "calcchains",
"application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml":"sheets",
"application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml": "strs",
"application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml":"styles",
"application/vnd.openxmlformats-officedocument.theme+xml":"themes",
"foo": "bar"
};
var WBPropsDef = {
allowRefreshQuery: '0',
autoCompressPictures: '1',
backupFile: '0',
checkCompatibility: '0',
codeName: '',
date1904: '0',
dateCompatibility: '1',
//defaultThemeVersion: '0',
filterPrivacy: '0',
hidePivotFieldList: '0',
promptedSolutions: '0',
publishItems: '0',
refreshAllConnections: false,
saveExternalLinkValues: '1',
showBorderUnselectedTables: '1',
showInkAnnotation: '1',
showObjects: 'all',
showPivotChartFilter: '0'
//updateLinks: 'userSet'
};
var WBViewDef = {
activeTab: '0',
autoFilterDateGrouping: '1',
firstSheet: '0',
minimized: '0',
showHorizontalScroll: '1',
showSheetTabs: '1',
showVerticalScroll: '1',
tabRatio: '600',
visibility: 'visible'
//window{Height,Width}, {x,y}Window
};
var SheetDef = {
state: 'visible'
};
var CalcPrDef = {
calcCompleted: '1',
calcMode: 'auto',
calcOnSave: '1',
concurrentCalc: '1',
fullCalcOnLoad: '0',
iterate: 'false',
iterateCount: '100',
iterateDelta: '0.001',
refMode: 'A1'
};
var XMLNS_CT = 'http://schemas.openxmlformats.org/package/2006/content-types';
var XMLNS_WB = 'http://schemas.openxmlformats.org/spreadsheetml/2006/main';
var encodings = {
'>': '>',
'&lt;': '<',
'&amp;': '&'
};
function unescapexml(text){
var s = text + '';
for(var y in encodings) s = s.replace(new RegExp(y,'g'), encodings[y]);
return s;
}
function parsexmltag(tag) {
var words = tag.split(/\s+/);
var z = {'0': words[0]};
if(words.length === 1) return z;
tag.match(/(\w+)="([^"]*)"/g).map(
function(x){var y=x.match(/(\w+)="([^"]*)"/); z[y[1]] = y[2]; });
return z;
}
var strs = {}; // shared strings
function parseSheet(data) { //TODO: use a real xml parser
var s = {};
var ref = data.match(/<dimension ref="([^"]*)"\s*\/>/);
if(ref) s["!ref"] = ref[1];
var refguess = {s: {r:1000000, c:1000000}, e: {r:0, c:0} };
//s.rows = {};
//s.cells = {};
var q = ["v","f"];
if(!data.match(/<sheetData *\/>/))
data.match(/<sheetData>(.*)<\/sheetData>/)[1].split("</row>").forEach(function(x) { if(x === "") return;
var row = parsexmltag(x.match(/<row[^>]*>/)[0]); //s.rows[row.r]=row.spans;
if(refguess.s.r > row.r - 1) refguess.s.r = row.r - 1;
if(refguess.e.r < row.r - 1) refguess.e.r = row.r - 1;
var cells = x.substr(x.indexOf('>')+1).split(/<\/c>|\/>/);
cells.forEach(function(c, idx) { if(c === "") return;
if(refguess.s.c > idx) refguess.s.c = idx;
if(refguess.e.c < idx) refguess.e.c = idx;
var cell = parsexmltag((c.match(/<c[^>]*>/)||[c])[0]); delete cell[0];
var d = c.substr(c.indexOf('>')+1);
var p = {};
q.forEach(function(f){var x=d.match(matchtag(f));if(x)p[f]=unescapexml(x[1]);});
/* SCHEMA IS ACTUALLY INCORRECT HERE. IF A CELL HAS NO T, EMIT "" */
if(cell.t === undefined) { p.t = "str"; p.v = undefined; }
else p.t = (cell.t ? cell.t : "n"); // default is "n" in schema
switch(p.t) {
case 'n': p.v = parseFloat(p.v); break;
case 's': p.v = strs[parseInt(p.v, 10)].t; break;
case 'str': break; // normal string
default: throw "Unrecognized cell type: " + p.t;
}
//s.cells[cell.r] = p;
s[cell.r] = p;
});
});
if(!s["!ref"]) s["!ref"] = encode_range(refguess);
if(debug) s.rawdata = data;
return s;
}
// matches <foo>...</foo> extracts content
function matchtag(f,g) {return new RegExp('<' + f + '>([\\s\\S]*)</' + f + '>',g||"");}
function parseStrs(data) {
var s = [];
var sst = data.match(new RegExp("<sst ([^>]*)>([\\s\\S]*)<\/sst>","m"));
if(sst) {
s = sst[2].replace(/<si>/g,"").split(/<\/si>/).map(function(x) { var z = {};
var y=x.match(/<(.*)>([\s\S]*)<\/.*/); if(y) z[y[1]]=unescapexml(y[2]); return z;});
sst = parsexmltag(sst[1]); s.count = sst.count; s.uniqueCount = sst.uniqueCount;
}
if(debug) s.rawdata = data;
return s;
}
function parseProps(data) {
var p = { Company:'' }, q = {};
var strings = ["Application", "DocSecurity", "Company", "AppVersion"];
var bools = ["HyperlinksChanged","SharedDoc","LinksUpToDate","ScaleCrop"];
var xtra = ["HeadingPairs", "TitlesOfParts","dc:creator","cp:lastModifiedBy","dcterms:created", "dcterms:modified"];
strings.forEach(function(f){p[f] = (data.match(matchtag(f))||[])[1];});
bools.forEach(function(f){p[f] = (data.match(matchtag(f))||[])[1] == "true";});
xtra.forEach(function(f) {
var cur = data.match(new RegExp("<" + f + "[^>]*>(.*)<\/" + f + ">"));
if(cur && cur.length > 0) q[f] = cur[1];
});
p["Worksheets"] = parseInt(q["HeadingPairs"].match(new RegExp("<vt:i4>(.*)<\/vt:i4>"))[1], 10);
p["SheetNames"] = q["TitlesOfParts"].match(new RegExp("<vt:lpstr>([^<]*)<\/vt:lpstr>","g")).map(function(x){return x.match(new RegExp("<vt:lpstr>([^<]*)<\/vt:lpstr>"))[1];});
p["Creator"] = q["dc:creator"];
p["LastModifiedBy"] = q["cp:lastModifiedBy"];
p["CreatedDate"] = new Date(q["dcterms:created"]);
p["ModifiedDate"] = new Date(q["dcterms:modified"]);
if(debug) p.rawdata = data;
return p;
}
function parseDeps(data) {
var d = [];
var l = 0, i = 1;
data.match(/<[^>]*>/g).forEach(function(x) {
var y = parsexmltag(x);
switch(y[0]) {
case '<?xml': break;
case '<calcChain': break;
case '<c': delete y[0]; if(y.i) i = y.i; else y.i = i; d.push(y); break;
}
});
if(debug) d.rawdata = data;
return d;
}
var ctext = {};
function parseCT(data) {
var ct = { workbooks: [], sheets: [], calcchains: [], themes: [], styles: [],
coreprops: [], extprops: [], strs:[], xmlns: "" };
if(data == null) return data;
data.match(/<[^>]*>/g).forEach(function(x) {
var y = parsexmltag(x);
switch(y[0]) {
case '<?xml': break;
case '<Types': ct.xmlns = y.xmlns; break;
case '<Default': ctext[y.Extension] = y.ContentType; break;
case '<Override':
if(y.ContentType in ct2type)ct[ct2type[y.ContentType]].push(y.PartName);
break;
}
});
if(ct.xmlns !== XMLNS_CT) throw "Unknown Namespace: " + ct.xmlns;
ct.calcchain = ct.calcchains.length > 0 ? ct.calcchains[0] : "";
delete ct.calcchains;
if(debug) ct.rawdata = data;
return ct;
}
function parseWB(data) {
var wb = { AppVersion:{}, WBProps:{}, WBView:[], Sheets:[], CalcPr:{}, xmlns: "" };
data.match(/<[^>]*>/g).forEach(function(x) {
var y = parsexmltag(x);
switch(y[0]) {
case '<?xml': break;
case '<workbook': wb.xmlns = y.xmlns; break;
case '<fileVersion':
if(y.appName != "xl") throw "Unexpected workbook.appName: "+y.appName;
delete y[0]; wb.AppVersion = y; break;
case '<workbookPr': delete y[0]; wb.WBProps = y; break;
case '<workbookPr/>': delete y[0]; wb.WBProps = y; break;
case '<bookViews>': case '</bookViews>': break; // aggregate workbookView
case '<workbookView': delete y[0]; wb.WBView.push(y); break;
case '<sheets>': case '</sheets>': break; // aggregate sheet
case '<sheet': delete y[0]; wb.Sheets.push(y); break;
case '</ext>': case '</extLst>': case '</workbook>': break;
case '<extLst>': break;
case '<calcPr': delete y[0]; wb.CalcPr = y; break;
case '<calcPr/>': delete y[0]; wb.CalcPr = y; break;
case '<definedNames/>': break;
case '<mx:ArchID': break;
case '<ext': break;//TODO: check with different versions of excel
default: console.log(y);
}
});
if(wb.xmlns !== XMLNS_WB) throw "Unknown Namespace: " + wb.xmlns;
var z;
for(z in WBPropsDef) if(null == wb.WBProps[z]) wb.WBProps[z] = WBPropsDef[z];
wb.WBView.forEach(function(w){for(var z in WBViewDef) if(null==w[z]) w[z]=WBViewDef[z]; });
for(z in CalcPrDef) if(null == wb.CalcPr[z]) wb.CalcPr[z] = CalcPrDef[z];
wb.Sheets.forEach(function(w){for(var z in SheetDef) if(null==w[z]) w[z]=SheetDef[z]; });
if(debug) wb.rawdata = data;
return wb;
}
function parseZip(zip) {
var entries = Object.keys(zip.files);
var keys = entries.filter(function(x){return x.substr(-1) != '/';}).sort();
var dir = parseCT((zip.files['[Content_Types].xml']||{}).data);
var wb = parseWB(zip.files[dir.workbooks[0].replace(/^\//,'')].data);
var propdata = dir.coreprops.length !== 0 ? zip.files[dir.coreprops[0].replace(/^\//,'')].data : "";
propdata += dir.extprops.length !== 0 ? zip.files[dir.extprops[0].replace(/^\//,'')].data : "";
var props = propdata !== "" ? parseProps(propdata) : {};
var deps = {};
if(dir.calcchain) deps=parseDeps(zip.files[dir.calcchain.replace(/^\//,'')].data);
if(dir.strs[0]) strs=parseStrs(zip.files[dir.strs[0].replace(/^\//,'')].data);
var sheets = {};
if(!props.Worksheets) {
var wbsheets = wb.Sheets;
props.Worksheets = wbsheets.length;
props.SheetNames = [];
for(var j = 0; j != wbsheets.length; ++j) {
props.SheetNames[j] = wbsheets[j].name;
}
}
for(var i = 0; i != props.Worksheets; ++i) {
sheets[props.SheetNames[i]]=parseSheet(zip.files[dir.sheets[i].replace(/^\//,'')].data);
}
return {
Directory: dir,
Workbook: wb,
Props: props,
Deps: deps,
Sheets: sheets,
SheetNames: props.SheetNames,
Strings: strs,
keys: keys,
files: zip.files
};
}
var fs, jszip;
if(typeof JSZip !== "undefined") jszip = JSZip;
if(typeof require !== "undefined") {
if(typeof jszip === 'undefined') jszip = require('./jszip').JSZip;
fs = require('fs');
}
function readSync(data, options) {
var zip, d = data;
var o = options||{};
switch((o.type||"base64")){
case "file": d = fs.readFileSync(data).toString('base64');
/* falls through */
case "base64": zip = new jszip(d, { base64:true }); break;
case "binary": zip = new jszip(d, { base64:false }); break;
}
return parseZip(zip);
}
function readFileSync(data, options) {
var o = options||{}; o.type = 'file';
return readSync(data, o);
}
this.read = readSync;
this.readFile = readFileSync;
this.parseZip = parseZip;
return this;
})();
function encode_col(col) { var s=""; for(++col; col; col=Math.floor((col-1)/26)) s = String.fromCharCode(((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); }
/**
* Convert a sheet into an array of objects where the column headers are keys.
**/
function sheet_to_row_object_array(sheet){
var val, rowObject, range, columnHeaders, emptyRow, C;
var outSheet = [];
if (sheet["!ref"]) {
range = XLSX.utils.decode_range(sheet["!ref"]);
columnHeaders = {};
for (C = range.s.c; C <= range.e.c; ++C) {
val = sheet[XLSX.utils.encode_cell({
c: C,
r: range.s.r
})];
if(val){
if(val.t === "s"){
columnHeaders[C] = val.v;
}
}
}
for (var R = range.s.r + 1; R <= range.e.r; ++R) {
emptyRow = true;
//Row number is recorded in the prototype
//so that it doesn't appear when stringified.
rowObject = Object.create({ __rowNum__ : R });
for (C = range.s.c; C <= range.e.c; ++C) {
val = sheet[XLSX.utils.encode_cell({
c: C,
r: R
})];
if(val !== undefined) switch(val.t){
case 's': case 'str':
if(val.v !== undefined) {
rowObject[columnHeaders[C]] = val.v;
emptyRow = false;
}
break;
default: throw 'unrecognized type ' + val.t;
}
}
if(!emptyRow) {
outSheet.push(rowObject);
}
}
}
return outSheet;
}
function sheet_to_csv(sheet) {
var stringify = function stringify(val) {
switch(val.t){
case 'n': return val.v;
case 's': case 'str': return JSON.stringify(val.v);
default: throw 'unrecognized type ' + val.t;
}
};
var out = "";
if(sheet["!ref"]) {
var r = utils.decode_range(sheet["!ref"]);
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[utils.encode_cell({c:C,r:R})];
row.push(val ? stringify(val) : "");
}
out += row.join(",") + "\n";
}
}
return out;
}
var 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,
sheet_to_row_object_array: sheet_to_row_object_array
};
if(typeof require !== 'undefined' && typeof exports !== 'undefined') {
exports.read = XLSX.read;
exports.readFile = XLSX.readFile;
exports.utils = utils;
exports.main = function(args) {
var zip = XLSX.read(args[0], {type:'file'});
console.log(zip.Sheets);
};
if(typeof module !== 'undefined' && require.main === module)
exports.main(process.argv.slice(2));
}