import SwiftUI
import WebKit
struct WebView: UIViewRepresentable {
let htmlContent: String
let settings: Settings
let onHeightChange: (CGFloat) -> Void
@Environment(\.colorScheme) private var colorScheme
func makeUIView(context: Context) -> WKWebView {
let webView = WKWebView()
webView.navigationDelegate = context.coordinator
webView.scrollView.isScrollEnabled = false
webView.isOpaque = false
webView.backgroundColor = UIColor.clear
// Message Handler hier einmalig hinzufügen
webView.configuration.userContentController.add(context.coordinator, name: "heightUpdate")
context.coordinator.onHeightChange = onHeightChange
return webView
}
func updateUIView(_ webView: WKWebView, context: Context) {
// Nur den HTML-Inhalt laden, keine Handler-Konfiguration
context.coordinator.onHeightChange = onHeightChange
let isDarkMode = colorScheme == .dark
// Font Settings aus Settings-Objekt
let fontSize = getFontSize(from: settings.fontSize ?? .extraLarge)
let fontFamily = getFontFamily(from: settings.fontFamily ?? .serif)
let styledHTML = """
\(htmlContent)
"""
webView.loadHTMLString(styledHTML, baseURL: nil)
}
func makeCoordinator() -> WebViewCoordinator {
WebViewCoordinator()
}
private func getFontSize(from fontSize: FontSize) -> Int {
switch fontSize {
case .small: return 14
case .medium: return 16
case .large: return 18
case .extraLarge: return 20
}
}
private func getFontFamily(from fontFamily: FontFamily) -> String {
switch fontFamily {
case .system:
return "-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif"
case .serif:
return "'Times New Roman', Times, 'Liberation Serif', serif"
case .sansSerif:
return "'Helvetica Neue', Helvetica, Arial, sans-serif"
case .monospace:
return "'SF Mono', Menlo, Monaco, Consolas, 'Liberation Mono', monospace"
}
}
}
class WebViewCoordinator: NSObject, WKNavigationDelegate, WKScriptMessageHandler {
var onHeightChange: ((CGFloat) -> Void)?
func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
if navigationAction.navigationType == .linkActivated {
if let url = navigationAction.request.url {
UIApplication.shared.open(url)
decisionHandler(.cancel)
return
}
}
decisionHandler(.allow)
}
func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
if message.name == "heightUpdate", let height = message.body as? CGFloat {
DispatchQueue.main.async {
self.onHeightChange?(height)
}
}
}
deinit {
// Der Message Handler wird automatisch mit der WebView entfernt
}
}