/// <summary>
/// Called when [element changed].
/// </summary>
/// <param name="e">The e.</param>
protected override void OnElementChanged(ElementChangedEventArgs <HybridWebView> e)
{
base.OnElementChanged(e);
if (this.Control == null)
{
var webView = new NativeWebView(this);
webView.Settings.JavaScriptEnabled = true;
//Turn off hardware rendering
webView.SetLayerType(LayerType.Software, null);
//Set the background color to transparent to fix an issue where the
//the picture would fail to draw
webView.SetBackgroundColor(Color.Transparent.ToAndroid());
webView.SetWebViewClient(this.GetWebViewClient());
webView.SetWebChromeClient(this.GetWebChromeClient());
webView.AddJavascriptInterface(new Xamarin(this), "Xamarin");
this.SetNativeControl(webView);
webView.LayoutParameters = new LayoutParams(LayoutParams.MatchParent, LayoutParams.MatchParent);
}
this.Unbind(e.OldElement);
this.Bind();
}
#pragma warning disable CA1054 // Uri parameters should not be strings
public void LoadUrl(string url)
#pragma warning restore CA1054 // Uri parameters should not be strings
{
if (!string.IsNullOrEmpty(url))
{
NativeWebView.LoadUrl(url);
}
}
public override UIView CreateView()
{
_view = new NativeWebView();
_view.MovedToWindowEvent += HandleMovedToWindowEvent;
_view.TouchesBeganEvent += HandleTouchesBeganEvent;
return(_view);
}
private void OnGoForwardRequested(object sender, EventArgs eventArgs)
{
if (NativeWebView.CanGoForward())
{
_eventState = WebNavigationEvent.Forward;
NativeWebView.GoForward();
}
UpdateCanGoBackForward();
}
private void OnLoadFinished(object sender, EventArgs e)
{
var url = NativeWebView.Url;
if (!string.IsNullOrEmpty(url))
{
SendNavigated(new UrlWebViewSource {
Url = url
}, _eventState, WebNavigationResult.Success);
}
NativeWebView.SetFocus(true);
UpdateCanGoBackForward();
NativeWebView.Eval(LoadBlazorJSScript);
Element.HandleNavigationFinished(new Uri(url));
}
private void OnRequestInterceptCallback(IntPtr context, IntPtr request, IntPtr userdata)
{
if (request == IntPtr.Zero)
{
throw new ArgumentNullException(nameof(request));
}
#if TIZEN60
var url = NativeWebView.GetInterceptRequestUrl(request);
#else
var url = NativeWebView.GetInterceptRequestUrl(request).Replace("http://framework/", "framework://");
#endif
var urlScheme = url.Substring(0, url.IndexOf(':'));
if (Element != null && Element.SchemeHandlers.TryGetValue(urlScheme, out var schemeHandler))
{
var uri = new Uri(url);
Console.WriteLine($"uri : Host : {uri.Host} - {uri.AbsolutePath.Substring(1)} - test {uri.Host.Equals("0.0.0.0", StringComparison.Ordinal)}");
var contentStream = schemeHandler(url, out var contentType);
if (contentStream != null)
{
var header = $"HTTP/1.0 200 OK\r\nContent-Type:{contentType}; charset=utf-8\r\nCache-Control:no-cache, max-age=0, must-revalidate, no-store\r\n\r\n";
if (urlScheme == "framework")
{
#pragma warning disable CA2000 // Dispose objects before losing scope
var memoryStream = new MemoryStream();
#pragma warning restore CA2000 // Dispose objects before losing scope
var buffer = Encoding.UTF8.GetBytes(InitScriptSource);
memoryStream.Write(buffer, 0, buffer.Length);
contentStream.CopyTo(memoryStream);
contentStream.Dispose();
memoryStream.Position = 0;
contentStream = memoryStream;
}
#pragma warning disable CA2000 // Dispose objects before losing scope
var body = new StreamReader(contentStream).ReadToEnd();
#pragma warning restore CA2000 // Dispose objects before losing scope
NativeWebView.SetInterceptRequestResponse(request, header, body, (uint)body.Length);
return;
}
}
NativeWebView.IgnoreInterceptRequest(request);
}
protected override void OnElementChanged(ElementChangedEventArgs <WebViewExtended> e)
{
if (e is null)
{
throw new ArgumentNullException(nameof(e));
}
if (Control == null)
{
TChromium.Initialize();
Forms.Context.Terminated += (sender, arg) => TChromium.Shutdown();
SetNativeControl(new WebViewContainer(Forms.NativeParent));
_interceptRequestCallback = OnRequestInterceptCallback;
NativeWebView.LoadStarted += OnLoadStarted;
NativeWebView.LoadFinished += OnLoadFinished;
NativeWebView.LoadError += OnLoadError;
NativeWebView.AddJavaScriptMessageHandler("BlazorHandler", PostMessageFromJS);
NativeWebView.SetInterceptRequestCallback(_interceptRequestCallback);
NativeWebView.GetSettings().JavaScriptEnabled = true;
}
if (e.OldElement != null)
{
e.OldElement.SendMessageFromJSToDotNetRequested -= OnSendMessageFromJSToDotNetRequested;
e.OldElement.EvalRequested -= OnEvalRequested;
e.OldElement.GoBackRequested -= OnGoBackRequested;
e.OldElement.GoForwardRequested -= OnGoForwardRequested;
e.OldElement.ReloadRequested -= OnReloadRequested;
}
if (e.NewElement != null)
{
e.NewElement.EvalRequested += OnEvalRequested;
e.NewElement.EvaluateJavaScriptRequested += OnEvaluateJavaScriptRequested;
e.NewElement.GoForwardRequested += OnGoForwardRequested;
e.NewElement.GoBackRequested += OnGoBackRequested;
e.NewElement.ReloadRequested += OnReloadRequested;
e.NewElement.SendMessageFromJSToDotNetRequested += OnSendMessageFromJSToDotNetRequested;
Load();
}
base.OnElementChanged(e);
}
/// <summary>
/// Called when [element changed].
/// </summary>
/// <param name="e">The e.</param>
protected override void OnElementChanged(ElementChangedEventArgs <HybridWebView> e)
{
base.OnElementChanged(e);
if (this.Control == null)
{
var webView = new NativeWebView(this);
webView.Settings.JavaScriptEnabled = true;
webView.SetWebViewClient(new Client(this));
webView.SetWebChromeClient(new ChromeClient(this));
webView.AddJavascriptInterface(new Xamarin(this), "Xamarin");
this.SetNativeControl(webView);
}
this.Unbind(e.OldElement);
this.Bind();
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (Control != null)
{
NativeWebView.StopLoading();
NativeWebView.LoadStarted -= OnLoadStarted;
NativeWebView.LoadFinished -= OnLoadFinished;
NativeWebView.LoadError -= OnLoadError;
}
if (Element != null)
{
Element.EvalRequested -= OnEvalRequested;
Element.EvaluateJavaScriptRequested -= OnEvaluateJavaScriptRequested;
Element.GoBackRequested -= OnGoBackRequested;
Element.GoForwardRequested -= OnGoForwardRequested;
Element.ReloadRequested -= OnReloadRequested;
Element.SendMessageFromJSToDotNetRequested -= OnSendMessageFromJSToDotNetRequested;
}
}
base.Dispose(disposing);
}
#pragma warning disable CA1054 // Uri parameters should not be strings
public void LoadHtml(string html, string baseUrl)
#pragma warning restore CA1054 // Uri parameters should not be strings
{
NativeWebView.LoadHtml(html, baseUrl);
}
private void UpdateCanGoBackForward()
{
ElementController.CanGoBack = NativeWebView.CanGoBack();
ElementController.CanGoForward = NativeWebView.CanGoForward();
}
private void OnReloadRequested(object sender, EventArgs eventArgs)
{
NativeWebView.Reload();
}
private Task <string> OnEvaluateJavaScriptRequested(string script)
{
NativeWebView.Eval(script);
return(null);
}
private void OnEvalRequested(object sender, EvalRequested eventArg)
{
NativeWebView.Eval(eventArg.Script);
}
private void OnSendMessageFromJSToDotNetRequested(object sender, string message)
{
var messageJSStringLiteral = JavaScriptEncoder.Default.Encode(message);
NativeWebView.Eval($"__dispatchMessageCallback(\"{messageJSStringLiteral}\")");
}
public override void CreateView()
{
_view = new NativeWebView();
_view.MovedToWindowEvent += HandleMovedToWindowEvent;
_view.TouchesBeganEvent += HandleTouchesBeganEvent;
}
