javascript/notification.js

// Monitors the gallery and sends a browser notification when the leading image is new.
(function () {
    let lastHeadImg = null;

    let notificationButton = null;

    onAfterUiUpdate(function () {
        if (notificationButton == null) {
            notificationButton = gradioApp().getElementById('request_notifications');

            if (notificationButton != null) {
                notificationButton.addEventListener('click', () => {
                    void Notification.requestPermission();
                }, true);
            }
        }

        const galleryPreviews = gradioApp().querySelectorAll('div[id^="tab_"] div[id$="_results"] .thumbnail-item > img');

        if (galleryPreviews == null) return;

        const headImg = galleryPreviews[0]?.src;

        if (headImg == null || headImg == lastHeadImg) return;

        lastHeadImg = headImg;

        // play notification sound if available
        const notificationAudio = gradioApp().querySelector('#audio_notification audio');
        if (notificationAudio) {
            notificationAudio.volume = opts.notification_volume / 100.0 || 1.0;
            notificationAudio.play();
        }

        if (document.hasFocus()) return;

        // Multiple copies of the images are in the DOM when one is selected. Dedup with a Set to get the real number generated.
        const imgs = new Set(Array.from(galleryPreviews).map(img => img.src));

        const notification = new Notification(
            'Stable Diffusion',
            {
                body: `Generated ${imgs.size > 1 ? imgs.size - opts.return_grid : 1} image${imgs.size > 1 ? 's' : ''}`,
                icon: headImg,
                image: headImg,
            }
        );

        notification.onclick = function (_) {
            parent.focus();
            this.close();
        };
    });
})();