async Task NavigationComplete(WKWebView webView, string filename, PageSize pageSize, PageMargin margin, TaskCompletionSource <ToFileResult> taskCompletionSource)
{
try
{
var widthString = await webView.EvaluateJavaScriptAsync("document.documentElement.offsetWidth");
var width = double.Parse(widthString.ToString());
var heightString = await webView.EvaluateJavaScriptAsync("document.documentElement.offsetHeight");
var height = double.Parse(heightString.ToString());
if (width < 1 || height < 1)
{
taskCompletionSource.SetResult(new ToFileResult(true, "WebView has zero width or height"));
return;
}
webView.ClipsToBounds = false;
webView.ScrollView.ClipsToBounds = false;
var bounds = webView.Bounds;
webView.Bounds = new CGRect(0, 0, (nfloat)width, (nfloat)height);
var scale = pageSize.Width / width;
var snapshotConfig = new WKSnapshotConfiguration
{
SnapshotWidth = pageSize.Width / Display.Scale
};
var image = await webView.TakeSnapshotAsync(snapshotConfig);
if (image.AsPNG() is NSData data)
{
var path = Path.Combine(ToPngService.FolderPath(), filename + ".png");
File.WriteAllBytes(path, data.ToArray());
taskCompletionSource.SetResult(new ToFileResult(false, path));
return;
}
webView.Bounds = bounds;
taskCompletionSource.SetResult(new ToFileResult(true, "No data returned."));
}
catch (Exception e)
{
taskCompletionSource.SetResult(new ToFileResult(true, "Exception: " + e.Message + (e.InnerException != null
? "Inner exception: " + e.InnerException.Message
: null)));
}
finally
{
webView.Dispose();
}
}
public async void DidFinishNavigation(WKWebView webView, WKNavigation navigation)
{
var content = await webView.EvaluateJavaScriptAsync("(function() { return ('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>'); })();");
var html = FromObject(content);
Console.WriteLine((html.ToString()).Substring(0, 40));
}
/*
* public void ToPdf(TaskCompletionSource<ToFileResult> taskCompletionSource, WebView xfWebView, string fileName)
* {
* if (xfWebView.Effects.Any(e=>e is Forms9Patch.WebViewPrintEffect))
* {
*
* }
* }
*/
async Task NavigationComplete(WKWebView webView, string filename, PageSize pageSize, PageMargin margin, TaskCompletionSource <ToFileResult> taskCompletionSource)
{
try
{
var widthString = await webView.EvaluateJavaScriptAsync("document.documentElement.offsetWidth");
var width = double.Parse(widthString.ToString());
var heightString = await webView.EvaluateJavaScriptAsync("document.documentElement.offsetHeight");
var height = double.Parse(heightString.ToString());
if (width < 1 || height < 1)
{
taskCompletionSource.SetResult(new ToFileResult(true, "WebView has zero width or height"));
return;
}
webView.ClipsToBounds = false;
webView.ScrollView.ClipsToBounds = false;
if (webView.CreatePdfFile(webView.ViewPrintFormatter, pageSize, margin) is NSMutableData data)
{
var path = System.IO.Path.Combine(ToPngService.FolderPath(), filename + ".pdf");
System.IO.File.WriteAllBytes(path, data.ToArray());
taskCompletionSource.SetResult(new ToFileResult(false, path));
data.Dispose();
return;
}
taskCompletionSource.SetResult(new ToFileResult(true, "No data returned."));
}
catch (Exception e)
{
taskCompletionSource.SetResult(new ToFileResult(true, "Exception: " + e.Message + (e.InnerException != null
? "Inner exception: " + e.InnerException.Message
: null)));
}
finally
{
webView.Dispose();
}
}
public Task <string> GetUserAgentAsync(CancellationToken cancellationToken)
{
if (!string.IsNullOrWhiteSpace(_userAgent))
{
return(Task.FromResult(_userAgent));
}
var taskCompletionSource = new TaskCompletionSource <string>();
this.InvokeOnMainThreadIfNeeded(async() =>
{
try
{
using (var webView = new WKWebView(CGRect.Empty, new WKWebViewConfiguration()))
{
webView.LoadHtmlString("<html></html>", null);
if (cancellationToken.IsCancellationRequested)
{
taskCompletionSource.TrySetCanceled();
return;
}
var userAgent = await webView
.EvaluateJavaScriptAsync("navigator.userAgent")
.ConfigureAwait(false);
_userAgent = userAgent as NSString;
taskCompletionSource.TrySetResult(_userAgent);
}
}
catch (Exception exception)
{
taskCompletionSource.TrySetException(exception);
}
});
return(taskCompletionSource.Task);
}
public override async void DidFinishNavigation(WKWebView webView, WKNavigation navigation)
{
if (!_modelRef.TryGetTarget(out CustomAuthModel model))
{
return;
}
if (!_closeRef.TryGetTarget(out var close))
{
return;
}
if (!model.IsInitialized)
{
model.IsInitialized = true;
model.IsBusy = false;
}
var url = webView.Url;
if (url == null)
{
return;
}
if (!model.IsCallbackPath(url.Path))
{
return;
}
var rawPageBody = await webView.EvaluateJavaScriptAsync("document.documentElement.outerText");
var content = rawPageBody.ToString();
RemoveAppleCookies();
model.Login(content);
close.Invoke();
}
async void HandleFormSubmission(WKWebView webView, Action <WKNavigationActionPolicy> decisionHandler)
{
var allInputsJson = await webView.EvaluateJavaScriptAsync(@"
JSON.stringify(
(new Array(...document.getElementsByTagName('input')))
.map(i => ({k: i.name || i.id, v: i.value}))
.filter(i => i.k))
" );
var allInputs = Newtonsoft.Json.JsonConvert.DeserializeObject <List <KV> > (
allInputsJson.ToString());
var currentAction = owner.eventsHandler.CurrentAction;
if (currentAction?.Type == WebViewActionType.UploadForm)
{
owner.eventsHandler.OnFormSubmitted(allInputs.Select(
i => new KeyValuePair <string, string>(i.k, i.v)).ToList());
decisionHandler(WKNavigationActionPolicy.Cancel);
}
else
{
decisionHandler(WKNavigationActionPolicy.Allow);
}
}
static async Task <string> EvaluateJavaScript(WKWebView webView, string script)
{
var result = await webView.EvaluateJavaScriptAsync(script);
return(result?.ToString() ?? "null");
}
public static void Eval(this WKWebView platformWebView, IWebView webView, string script)
{
platformWebView.EvaluateJavaScriptAsync(script);
}
public static async Task <string> ExecuteScriptAsync(WKWebView webview, string script)
{
var nsStringResult = await webview.EvaluateJavaScriptAsync(script);
return(nsStringResult?.ToString());
}
public async override void DidFinishNavigation(WKWebView webView, WKNavigation navigation)
{
await webView.EvaluateJavaScriptAsync("addObservers();");
}