MQL-Development
/
google_apps


			
				
					
						
						
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							import AppKit
import WebKit

final class InAppBrowserWindowManager {
    static let shared = InAppBrowserWindowManager()

    private var controllers: [InAppBrowserWindowController] = []

    private init() {}

    func open(url: URL, title: String? = nil) {
        let controller = InAppBrowserWindowController(initialURL: url, windowTitle: title)
        controllers.append(controller)
        controller.onClose = { [weak self, weak controller] in
            guard let self, let controller else { return }
            self.controllers.removeAll { $0 === controller }
        }
        controller.showWindow(nil)
        controller.window?.makeKeyAndOrderFront(nil)
    }
}

final class InAppBrowserWindowController: NSWindowController, NSWindowDelegate {
    var onClose: (() -> Void)?

    private let webView: WKWebView
    private let initialURL: URL
    private var didLoadInitialURL = false

    init(initialURL: URL, windowTitle: String?) {
        self.initialURL = initialURL

        let config = WKWebViewConfiguration()
        config.defaultWebpagePreferences.allowsContentJavaScript = true
        self.webView = WKWebView(frame: .zero, configuration: config)

        let window = NSWindow(
            contentRect: NSRect(x: 180, y: 140, width: 1200, height: 800),
            styleMask: [.titled, .closable, .miniaturizable, .resizable],
            backing: .buffered,
            defer: false
        )
        window.title = windowTitle ?? "Browser"
        window.isReleasedWhenClosed = false
        window.contentView = webView

        super.init(window: window)

        window.delegate = self
        webView.uiDelegate = self
        webView.navigationDelegate = self
        webView.allowsBackForwardNavigationGestures = true
        webView.setValue(false, forKey: "drawsBackground")
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) {
        nil
    }

    override func showWindow(_ sender: Any?) {
        super.showWindow(sender)
        guard !didLoadInitialURL else { return }
        didLoadInitialURL = true
        webView.load(URLRequest(url: initialURL))
    }

    func windowWillClose(_ notification: Notification) {
        onClose?()
    }
}

extension InAppBrowserWindowController: WKNavigationDelegate {
    func webView(
        _ webView: WKWebView,
        decidePolicyFor navigationAction: WKNavigationAction,
        decisionHandler: @escaping (WKNavigationActionPolicy) -> Void
    ) {
        if navigationAction.targetFrame == nil, let url = navigationAction.request.url {
            InAppBrowserWindowManager.shared.open(url: url)
            decisionHandler(.cancel)
            return
        }

        decisionHandler(.allow)
    }

    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        if let host = webView.url?.host, !host.isEmpty {
            window?.title = host
        }
    }

    func webView(
        _ webView: WKWebView,
        didFailProvisionalNavigation navigation: WKNavigation!,
        withError error: Error
    ) {
        showLoadError(error)
    }

    func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
        showLoadError(error)
    }

    private func showLoadError(_ error: Error) {
        let message = """
        <html>
        <body style="background:#111;color:#EEE;font-family:-apple-system, sans-serif;padding:24px;">
        <h2>Page failed to load</h2>
        <p>Could not open <b>\(initialURL.absoluteString)</b></p>
        <p>\(error.localizedDescription)</p>
        </body>
        </html>
        """
        webView.loadHTMLString(message, baseURL: nil)
        window?.title = "Load Error"
    }
}

extension InAppBrowserWindowController: WKUIDelegate {
    func webView(
        _ webView: WKWebView,
        createWebViewWith configuration: WKWebViewConfiguration,
        for navigationAction: WKNavigationAction,
        windowFeatures: WKWindowFeatures
    ) -> WKWebView? {
        guard let url = navigationAction.request.url else { return nil }
        InAppBrowserWindowManager.shared.open(url: url)
        return nil
    }
}