sheetjs-clone/bits/19_fsutils.js

73 lines
3.4 KiB
JavaScript

var _fs;
if(typeof require !== 'undefined') try { _fs = require('fs'); } catch(e) {}
/* normalize data for blob ctor */
function blobify(data) {
if(typeof data === "string") return s2ab(data);
if(Array.isArray(data)) return a2u(data);
return data;
}
/* write or download file */
function write_dl(fname/*:string*/, payload/*:any*/, enc/*:?string*/) {
/*global IE_SaveFile, Blob, navigator, saveAs, document, File, chrome */
if(typeof _fs !== 'undefined' && _fs.writeFileSync) return enc ? _fs.writeFileSync(fname, payload, enc) : _fs.writeFileSync(fname, payload);
if(typeof Deno !== 'undefined') {
/* in this spot, it's safe to assume typed arrays and TextEncoder/TextDecoder exist */
if(enc) switch(enc) {
case "utf8": payload = new TextEncoder(enc).encode(payload); break;
case "binary": payload = s2ab(payload); break;
/* TODO: binary equivalent */
default: throw new Error("Unsupported encoding " + enc);
}
return Deno.writeFileSync(fname, payload);
}
var data = (enc == "utf8") ? utf8write(payload) : payload;
/*:: declare var IE_SaveFile: any; */
if(typeof IE_SaveFile !== 'undefined') return IE_SaveFile(data, fname);
if(typeof Blob !== 'undefined') {
var blob = new Blob([blobify(data)], {type:"application/octet-stream"});
/*:: declare var navigator: any; */
if(typeof navigator !== 'undefined' && navigator.msSaveBlob) return navigator.msSaveBlob(blob, fname);
/*:: declare var saveAs: any; */
if(typeof saveAs !== 'undefined') return saveAs(blob, fname);
if(typeof URL !== 'undefined' && typeof document !== 'undefined' && document.createElement && URL.createObjectURL) {
var url = URL.createObjectURL(blob);
/*:: declare var chrome: any; */
if(typeof chrome === 'object' && typeof (chrome.downloads||{}).download == "function") {
if(URL.revokeObjectURL && typeof setTimeout !== 'undefined') setTimeout(function() { URL.revokeObjectURL(url); }, 60000);
return chrome.downloads.download({ url: url, filename: fname, saveAs: true});
}
var a = document.createElement("a");
if(a.download != null) {
/*:: if(document.body == null) throw new Error("unreachable"); */
a.download = fname; a.href = url; document.body.appendChild(a); a.click();
/*:: if(document.body == null) throw new Error("unreachable"); */ document.body.removeChild(a);
if(URL.revokeObjectURL && typeof setTimeout !== 'undefined') setTimeout(function() { URL.revokeObjectURL(url); }, 60000);
return url;
}
}
}
// $FlowIgnore
if(typeof $ !== 'undefined' && typeof File !== 'undefined' && typeof Folder !== 'undefined') try { // extendscript
// $FlowIgnore
var out = File(fname); out.open("w"); out.encoding = "binary";
if(Array.isArray(payload)) payload = a2s(payload);
out.write(payload); out.close(); return payload;
} catch(e) { if(!e.message || !e.message.match(/onstruct/)) throw e; }
throw new Error("cannot save file " + fname);
}
/* read binary data from file */
function read_binary(path/*:string*/) {
if(typeof _fs !== 'undefined') return _fs.readFileSync(path);
if(typeof Deno !== 'undefined') return Deno.readFileSync(path);
// $FlowIgnore
if(typeof $ !== 'undefined' && typeof File !== 'undefined' && typeof Folder !== 'undefined') try { // extendscript
// $FlowIgnore
var infile = File(path); infile.open("r"); infile.encoding = "binary";
var data = infile.read(); infile.close();
return data;
} catch(e) { if(!e.message || !e.message.match(/onstruct/)) throw e; }
throw new Error("Cannot access file " + path);
}