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electron.js
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electron.js
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const {app, BrowserWindow, ipcMain, shell} = require('electron');
const path = require('path');
const url = require('url');
const fs = require('fs');
// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow;
function createWindow() {
// Create the browser window.
var width = 800,
height = 600;
const screen = require('electron').screen;
if (screen) {
const display = screen.getPrimaryDisplay();
if (display && display.workArea) {
width = display.workArea.width || width;
height = display.workArea.height || height;
}
}
mainWindow = new BrowserWindow({
width: width,
height: height,
minWidth: 400,
minHeight: 400,
textAreasAreResizable: false,
plugins: true,
show: false // Don't show it until it's ready to prevent showing a blank screen.
});
// And load the index.html of the app.
mainWindow.loadURL(url.format({
pathname: path.join(__dirname, 'index.html'),
protocol: 'file:',
slashes: true
}));
mainWindow.once('ready-to-show', () => {
mainWindow.show();
mainWindow.maximize();
});
// Emitted when the window is closed.
mainWindow.on('closed', () => {
// Dereference the window object.
mainWindow = null
});
}
// This method will be called when Electron has finished initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', function() {
createWindow();
});
// Quit when all windows are closed.
app.on('window-all-closed', () => {
app.exit();
});
app.on('activate', () => {
// On macOS it's common to re-create a window in the app when the dock icon is clicked and there are no other windows open.
if (mainWindow === null) {
createWindow();
}
});
// Read the config.json file to set app's protocol (custom URL scheme).
fs.readFile(path.join(__dirname, 'config.json'), 'utf8', (err, data) => {
var ssoScheme = 'moodlemobile'; // Default value.
if (!err) {
try {
data = JSON.parse(data);
ssoScheme = data.customurlscheme;
} catch(ex) {}
}
app.setAsDefaultProtocolClient(ssoScheme);
});
// Make sure that only a single instance of the app is running.
var shouldQuit = app.makeSingleInstance((argv, workingDirectory) => {
// Another instance was launched. If it was launched with a URL, it should be in the second param.
if (argv && argv[1]) {
appLaunched(argv[1]);
} else {
focusApp();
}
});
// For some reason, shouldQuit is always true in signed Mac apps so we should ingore it.
if (shouldQuit && os.platform().indexOf('darwin') == -1) {
// It's not the main instance of the app, kill it.
app.exit();
return;
}
// Listen for open-url events (Mac OS only).
app.on('open-url', (event, url) => {
event.preventDefault();
appLaunched(url);
});
function appLaunched(url) {
// App was launched again with a URL. Focus the main window and send an event to treat the URL.
if (mainWindow) {
focusApp();
mainWindow.webContents.send('mmAppLaunched', url); // Send an event to the main window.
}
}
function focusApp() {
if (mainWindow) {
if (mainWindow.isMinimized()) {
mainWindow.restore();
}
mainWindow.focus();
}
}
// Listen for events sent by the renderer processes (windows).
ipcMain.on('openItem', (event, path) => {
shell.openItem(path);
});
ipcMain.on('closeSecondaryWindows', () => {
var windows = BrowserWindow.getAllWindows();
for (var i = 0; i < windows.length; i++) {
if (!mainWindow || windows[i].id != mainWindow.id) {
windows[i].close();
}
}
});
ipcMain.on('focusApp', focusApp);