74 lines
2.4 KiB
JavaScript
74 lines
2.4 KiB
JavaScript
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/* sheetjs (C) 2013-present SheetJS -- https://sheetjs.com */
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const XLSX = require('xlsx');
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const electron = require('@electron/remote');
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/* list of supported extensions */
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const EXTENSIONS = "xls|xlsx|xlsm|xlsb|xml|csv|txt|dif|sylk|slk|prn|ods|fods|htm|html|numbers".split("|");
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/* write file with Electron API */
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async function exportFile() {
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const HTMLOUT = document.getElementById('htmlout');
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const wb = XLSX.utils.table_to_book(HTMLOUT.getElementsByTagName("TABLE")[0]);
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const o = await electron.dialog.showSaveDialog({
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title: 'Save file as',
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filters: [{
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name: "Spreadsheets",
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extensions: EXTENSIONS
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}]
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});
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XLSX.writeFile(wb, o.filePath);
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electron.dialog.showMessageBox({ message: "Exported data to " + o.filePath, buttons: ["OK"] });
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}
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document.getElementById('exportBtn').addEventListener('click', exportFile, false);
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/* common handler to create HTML tables on the page */
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function process_wb(wb) {
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const HTMLOUT = document.getElementById('htmlout');
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const XPORT = document.getElementById('exportBtn');
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XPORT.disabled = false;
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HTMLOUT.innerHTML = "";
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wb.SheetNames.forEach(function(sheetName) {
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const htmlstr = XLSX.utils.sheet_to_html(wb.Sheets[sheetName],{editable:true});
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HTMLOUT.innerHTML += htmlstr;
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});
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}
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/* read file with Electron API */
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async function handleReadBtn() {
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const o = await electron.dialog.showOpenDialog({
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title: 'Select a file',
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filters: [{
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name: "Spreadsheets",
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extensions: EXTENSIONS
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}],
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properties: ['openFile']
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});
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if(o.filePaths.length == 0) throw new Error("No file was selected!");
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process_wb(XLSX.readFile(o.filePaths[0]));
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}
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document.getElementById('readBtn').addEventListener('click', handleReadBtn, false);
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/* read file with Web APIs */
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async function readFile(files) {
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const f = files[0];
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const data = await f.arrayBuffer();
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process_wb(XLSX.read(data));
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}
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// file input element
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document.getElementById('readIn').addEventListener('change', (e) => { readFile(e.target.files); }, false);
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// drag and drop
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const drop = document.getElementById('drop');
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drop.addEventListener('drop', (e) => {
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e.stopPropagation(); e.preventDefault();
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readFile(e.dataTransfer.files);
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}, false);
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const handleDrag = (e) => {
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e.stopPropagation(); e.preventDefault();
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e.dataTransfer.dropEffect = 'copy';
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};
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drop.addEventListener('dragenter', handleDrag, false);
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drop.addEventListener('dragover', handleDrag, false);
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