diff options
Diffstat (limited to 'Xamarin.Forms.Platform.MacOS/Renderers/WebViewRenderer.cs')
| -rw-r--r-- | Xamarin.Forms.Platform.MacOS/Renderers/WebViewRenderer.cs | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.MacOS/Renderers/WebViewRenderer.cs b/Xamarin.Forms.Platform.MacOS/Renderers/WebViewRenderer.cs new file mode 100644 index 00000000..8d93c2c7 --- /dev/null +++ b/Xamarin.Forms.Platform.MacOS/Renderers/WebViewRenderer.cs @@ -0,0 +1,149 @@ +using System; +using System.ComponentModel; +using AppKit; +using Foundation; +using Xamarin.Forms.Internals; + +namespace Xamarin.Forms.Platform.MacOS +{ + public class WebViewRenderer : ViewRenderer<WebView, WebKit.WebView>, IWebViewDelegate + { + bool _disposed; + bool _ignoreSourceChanges; + WebNavigationEvent _lastBackForwardEvent; + WebNavigationEvent _lastEvent; + + IElementController ElementController => Element; + + void IWebViewDelegate.LoadHtml(string html, string baseUrl) + { + if (html != null) + Control.MainFrame.LoadHtmlString(html, + baseUrl == null ? new NSUrl(NSBundle.MainBundle.BundlePath, true) : new NSUrl(baseUrl, true)); + } + + void IWebViewDelegate.LoadUrl(string url) + { + Control.MainFrame.LoadRequest(new NSUrlRequest(new NSUrl(url))); + } + + protected override void OnElementChanged(ElementChangedEventArgs<WebView> e) + { + base.OnElementChanged(e); + + if (e.NewElement != null) + { + if (Control == null) + { + SetNativeControl(new WebKit.WebView + { + AutoresizingMask = NSViewResizingMask.WidthSizable, + AutoresizesSubviews = true + }); + Control.OnFinishedLoading += OnNSWebViewFinishedLoad; + Control.OnFailedLoading += OnNSWebViewFailedLoadWithError; + + Element.EvalRequested += OnEvalRequested; + Element.GoBackRequested += OnGoBackRequested; + Element.GoForwardRequested += OnGoForwardRequested; + + Layer.BackgroundColor = NSColor.Clear.CGColor; + } + } + + Load(); + } + + protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e) + { + base.OnElementPropertyChanged(sender, e); + + if (e.PropertyName == WebView.SourceProperty.PropertyName) + Load(); + } + + protected override void Dispose(bool disposing) + { + if (disposing && !_disposed) + { + _disposed = true; + Control.OnFinishedLoading -= OnNSWebViewFinishedLoad; + Control.OnFailedLoading -= OnNSWebViewFailedLoadWithError; + Element.EvalRequested -= OnEvalRequested; + Element.GoBackRequested -= OnGoBackRequested; + Element.GoForwardRequested -= OnGoForwardRequested; + } + base.Dispose(disposing); + } + + void Load() + { + if (_ignoreSourceChanges) + return; + + Element?.Source?.Load(this); + + UpdateCanGoBackForward(); + } + + void UpdateCanGoBackForward() + { + if (Element == null) + return; + Element.CanGoBack = Control.CanGoBack(); + Element.CanGoForward = Control.CanGoForward(); + } + + void OnEvalRequested(object sender, EvalRequested eventArg) + { + Control?.StringByEvaluatingJavaScriptFromString(eventArg?.Script); + } + + void OnGoBackRequested(object sender, EventArgs eventArgs) + { + if (Control.CanGoBack()) + { + _lastBackForwardEvent = WebNavigationEvent.Back; + Control.GoBack(); + } + + UpdateCanGoBackForward(); + } + + void OnGoForwardRequested(object sender, EventArgs eventArgs) + { + if (Control.CanGoForward()) + { + _lastBackForwardEvent = WebNavigationEvent.Forward; + Control.GoForward(); + } + + UpdateCanGoBackForward(); + } + + void OnNSWebViewFailedLoadWithError(object sender, WebKit.WebResourceErrorEventArgs e) + { + _lastEvent = _lastBackForwardEvent; + Element?.SendNavigated(new WebNavigatedEventArgs(_lastEvent, new UrlWebViewSource { Url = Control.MainFrameUrl }, + Control.MainFrameUrl, WebNavigationResult.Failure)); + + UpdateCanGoBackForward(); + } + + void OnNSWebViewFinishedLoad(object sender, WebKit.WebResourceCompletedEventArgs e) + { + if (Control.IsLoading) + return; + + _ignoreSourceChanges = true; + ElementController?.SetValueFromRenderer(WebView.SourceProperty, new UrlWebViewSource { Url = Control.MainFrameUrl }); + _ignoreSourceChanges = false; + + _lastEvent = _lastBackForwardEvent; + Element?.SendNavigated(new WebNavigatedEventArgs(_lastEvent, Element?.Source, Control.MainFrameUrl, + WebNavigationResult.Success)); + + UpdateCanGoBackForward(); + } + } +}
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