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const { dialog } = require( 'electron' );
/**
* Handles client responses to the beforeunload event. Electron doesn't have a default implementation
* like browsers do, so we need to provide our own.
*/
module.exports = function ( { view, window } ) {
view.webContents.on( 'will-prevent-unload', ( event ) => {
const choice = dialog.showMessageBoxSync( window, {
type: 'question',
buttons: [ 'Stay', 'Leave' ],
defaultId: 1,
cancelId: 0,
title: 'WordPress.com',
// The beforeunload handler can set a custom message
// e.g. https://github.com/WordPress/gutenberg/blob/4b60f9ececa96ba51d9cae4d6d7a9a1311d8b9d8/packages/editor/src/components/unsaved-changes-warning/index.js#L34
// Unfortunately Electron doesn't give us access to that value.
message: 'You have unsaved changes. If you proceed, they will be lost.',
} );
if ( choice === 1 ) {
// preventDefault() ignores the beforeunload event handler and allow the page to be unloaded.
event.preventDefault();
}
} );
};
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