Stop media playback when the main window is closed. Issue #1646

Mac/MainWindow/Detail/DetailViewController.swift

@@ -56,6 +56,10 @@ final class DetailViewController: NSViewController, WKUIDelegate {
 		currentWebViewController = webViewController(for: mode)
 	}
 
+	func stopMediaPlayback() {
+		currentWebViewController.stopMediaPlayback()
+	}
+	
 	func canScrollDown(_ callback: @escaping (Bool) -> Void) {
 		currentWebViewController.canScrollDown(callback)
 	}

Mac/MainWindow/Detail/DetailWebViewController.swift

@@ -107,6 +107,12 @@ final class DetailWebViewController: NSViewController, WKUIDelegate {
 		reloadHTML()
 	}
 
+	// MARK: Media Functions
+	
+	func stopMediaPlayback() {
+		webView.evaluateJavaScript("stopMediaPlayback();")
+	}
+	
 	// MARK: Scrolling
 
 	func canScrollDown(_ callback: @escaping (Bool) -> Void) {

Mac/MainWindow/MainWindowController.swift

@@ -376,6 +376,14 @@ class MainWindowController : NSWindowController, NSUserInterfaceValidations {
 	}
 }
 
+// MARK: NSWindowDelegate
+
+extension MainWindowController: NSWindowDelegate {
+	func windowWillClose(_ notification: Notification) {
+		detailViewController?.stopMediaPlayback()
+	}
+}
+
 // MARK: - SidebarDelegate
 
 extension MainWindowController: SidebarDelegate {

Shared/Article Rendering/ArticleRenderer.swift

@@ -358,6 +358,17 @@ private extension ArticleRenderer {
 			window.webkit.messageHandlers.mouseDidExit.postMessage(anchor.href);
 		}
 
+		function stopMediaPlayback() {
+			document.querySelectorAll("iframe").forEach(element => {
+				var iframeSrc = element.src;
+				element.src = iframeSrc;
+			});
+
+			document.querySelectorAll("video, audio").forEach(element => {
+				element.pause();
+			});
+		}
+		
 		</script>
 
 		"""