private async Task UpdateHTMLPageToShowErrorAsync()
{
var errorData = GenerateErrorMessage(_viewModel.ErrorType);
var jsToEvaluate = "ChangePageContent (" +
$"'{errorData.Item1}'," +
$"'{errorData.Item2}'," +
" true)";
await HybridWebViewControl.EvaluateJavaScriptAsync(jsToEvaluate);
}
public JavascriptInternet()
{
InitializeComponent();
InjectionText.Text = "document.body.style.backgroundColor = \"red\";";
GlobalText.Text = "globalCallback('Hello from Javascript!');";
LocalText.Text = "localCallback('Hello from Javascript!');";
HybridWebViewControl.AddGlobalCallback("globalCallback", GlobalCallback);
WebContent.AddLocalCallback("localCallback", LocalCallback);
}
private async void OnCallbackAdded(object sender, string e)
{
if (Element == null || string.IsNullOrWhiteSpace(e))
{
return;
}
if ((sender == null && Element.EnableGlobalCallbacks) || sender != null)
{
await OnJavascriptInjectionRequestAsync(HybridWebViewControl.GenerateFunctionScript(e));
}
}
public JavascriptString()
{
InitializeComponent();
WebContent.Source = "<!doctype html><html><head></head><body><h1>String Data Example</h1></body></html>";
InjectionText.Text = "document.body.style.backgroundColor = \"red\";";
GlobalText.Text = "globalCallback('Hello from Javascript!');";
LocalText.Text = "localCallback('Hello from Javascript!');";
HybridWebViewControl.AddGlobalCallback("globalCallback", GlobalCallback);
WebContent.AddLocalCallback("localCallback", LocalCallback);
}
private void DestroyOldElement(HybridWebViewControl element)
{
element.PropertyChanged -= OnWebViewPropertyChanged;
element.OnJavascriptInjectionRequest -= OnJavascriptInjectionRequestAsync;
element.OnClearCookiesRequested -= OnClearCookiesRequest;
element.OnBackRequested -= OnBackRequested;
element.OnGetAllCookiesRequestedAsync -= OnGetAllCookieRequestAsync;
element.OnGetCookieRequestedAsync -= OnGetCookieRequestAsync;
element.OnSetCookieRequestedAsync -= OnSetCookieRequestAsync;
element.OnForwardRequested -= OnForwardRequested;
element.OnRefreshRequested -= OnRefreshRequested;
element.Dispose();
}
private void SetupNewElement(HybridWebViewControl element)
{
element.PropertyChanged += OnWebViewPropertyChanged;
element.OnJavascriptInjectionRequest += OnJavascriptInjectionRequestAsync;
element.OnClearCookiesRequested += OnClearCookiesRequest;
element.OnGetAllCookiesRequestedAsync += OnGetAllCookieRequestAsync;
element.OnGetCookieRequestedAsync += OnGetCookieRequestAsync;
element.OnSetCookieRequestedAsync += OnSetCookieRequestAsync;
element.OnBackRequested += OnBackRequested;
element.OnForwardRequested += OnForwardRequested;
element.OnRefreshRequested += OnRefreshRequested;
SetSource();
}
public override async void OnPageFinished(Android.Webkit.WebView view, string url)
{
if (_reference == null || !_reference.TryGetTarget(out var renderer))
{
return;
}
if (renderer.Element == null)
{
return;
}
// Add Injection Function
await renderer.OnJavascriptInjectionRequest(HybridWebViewControl.InjectedFunction);
// Add Global Callbacks
if (renderer.Element.EnableGlobalCallbacks)
{
foreach (var callback in HybridWebViewControl.GlobalRegisteredCallbacks)
{
await renderer.OnJavascriptInjectionRequest(HybridWebViewControl.GenerateFunctionScript(callback.Key));
}
}
// Add Local Callbacks
foreach (var callback in renderer.Element.LocalRegisteredCallbacks)
{
await renderer.OnJavascriptInjectionRequest(HybridWebViewControl.GenerateFunctionScript(callback.Key));
}
renderer.Element.CanGoBack = view.CanGoBack();
renderer.Element.CanGoForward = view.CanGoForward();
renderer.Element.Navigating = false;
renderer.Element.HandleNavigationCompleted(url);
renderer.Element.HandleContentLoaded();
}
public HomePage([Optional] string url)
{
InitializeComponent();
if (Device.RuntimePlatform == Device.iOS && !string.IsNullOrWhiteSpace(url) && url.StartsWith("safe://"))
{
_launchUrl = url;
}
AddressBarEntry.Focused += AddressBarEntryFocused;
AddressBarEntry.Unfocused += AddressBarEntryUnfocused;
AddressBarEntry.TextChanged += AddressBarEntryTextChanged;
AddressBarEntry.Completed += AddressBarTextChangeCompleted;
MessagingCenter.Subscribe <BookmarksModalPageViewModel, string>(
this,
MessageCenterConstants.BookmarkUrl,
(sender, args) =>
{
_viewModel.LoadUrl(args);
});
MessagingCenter.Subscribe <App, string>(
this,
MessageCenterConstants.LoadSafeWebsite,
(sender, args) =>
{
_viewModel.LoadUrl(args);
});
MessagingCenter.Subscribe <MenuPopUpViewModel>(
this,
MessageCenterConstants.ReloadMessage,
(sender) =>
{
_viewModel.IsNavigating = true;
_viewModel.ReloadCommand.Execute(null);
});
MessagingCenter.Subscribe <HomePageViewModel>(
this,
MessageCenterConstants.ShowErrorPage,
async(sender) =>
{
if (((UrlWebViewSource)HybridWebViewControl.Source).Url != _viewModel.WelcomePageUrl)
{
HybridWebViewControl.Source = _viewModel.WelcomePageUrl;
}
else
{
await UpdateHTMLPageToShowErrorAsync();
_viewModel.IsErrorState = false;
if (_viewModel.IsNavigating)
{
_viewModel.IsNavigating = false;
}
}
});
MessagingCenter.Subscribe <HomePageViewModel>(
this,
MessageCenterConstants.UpdateErrorMsg,
async(sender) =>
{
await UpdateHTMLPageToShowErrorAsync();
});
MessagingCenter.Subscribe <App>(
this,
MessageCenterConstants.InitialiseSession,
async(sender) =>
{
await _viewModel.InitilizeSessionAsync();
});
MessagingCenter.Subscribe <App>(
this,
MessageCenterConstants.SessionReconnect,
async(sender) =>
{
if (App.AppSession.IsDisconnected)
{
await ReconnectSessionAsync();
}
});
MessagingCenter.Subscribe <App>(
this,
MessageCenterConstants.UpdateWelcomePageTheme,
async(sender) =>
{
var theme = Xamarin.Essentials.Preferences.Get(Constants.AppThemePreferenceKey, false);
var jsToEvaluate = "ChangeBackgroundColor (" + $"'{theme.ToString()}'" + ")";
await HybridWebViewControl.EvaluateJavaScriptAsync(jsToEvaluate);
});
}
public HomePage([Optional] string url)
{
InitializeComponent();
if (Device.RuntimePlatform == Device.iOS && !string.IsNullOrWhiteSpace(url) && url.StartsWith("safe://"))
{
_launchUrl = url;
}
AddressBarEntry.Focused += AddressBarEntryFocused;
AddressBarEntry.Unfocused += AddressBarEntryUnfocused;
AddressBarEntry.TextChanged += AddressBarEntryTextChanged;
AddressBarEntry.Completed += AddressBarTextChangeCompleted;
MessagingCenter.Subscribe <App, string>(
this,
MessageCenterConstants.LoadSafeWebsite,
(sender, args) =>
{
_viewModel.LoadUrl(args);
});
MessagingCenter.Subscribe <MenuPopUpViewModel>(
this,
MessageCenterConstants.ReloadMessage,
(sender) =>
{
_viewModel.IsNavigating = true;
_viewModel.ReloadCommand.Execute(null);
});
MessagingCenter.Subscribe <HomePageViewModel>(
this,
MessageCenterConstants.ShowErrorPage,
async(sender) =>
{
if (((UrlWebViewSource)HybridWebViewControl.Source).Url != _viewModel.WelcomePageUrl)
{
HybridWebViewControl.Source = _viewModel.WelcomePageUrl;
}
else
{
await UpdateHTMLPageToShowErrorAsync();
_viewModel.IsErrorState = false;
if (_viewModel.IsNavigating)
{
_viewModel.IsNavigating = false;
}
}
});
MessagingCenter.Subscribe <HomePageViewModel>(
this,
MessageCenterConstants.UpdateErrorMsg,
async(sender) =>
{
await UpdateHTMLPageToShowErrorAsync();
});
MessagingCenter.Subscribe <App>(
this,
MessageCenterConstants.InitialiseSession,
async(sender) =>
{
await _viewModel.InitilizeSessionAsync();
});
MessagingCenter.Subscribe <App>(
this,
MessageCenterConstants.SessionReconnect,
async(sender) =>
{
if (App.AppSession.IsDisconnected)
{
await ReconnectSessionAsync();
}
});
MessagingCenter.Subscribe <App>(
this,
MessageCenterConstants.UpdateWelcomePageTheme,
async(sender) =>
{
try
{
var theme = Xamarin.Essentials.Preferences.Get(Constants.AppThemePreferenceKey, false);
var jsToEvaluate = "ChangeBackgroundColor (" + $"'{theme}'" + ")";
await HybridWebViewControl?.EvaluateJavaScriptAsync(jsToEvaluate);
}
catch (Exception ex)
{
Logger.Error(ex);
}
});
MessagingCenter.Subscribe <AuthenticationService>(
this,
MessageCenterConstants.Authenticated,
(sender) =>
{
_viewModel.UpdateAuthenticationState();
});
// Todo: Required to add no internet connection status in the top navigation bar
// MessagingCenter.Subscribe<App>(
// this,
// MessageCenterConstants.NoInternet,
// (sender) =>
// {
// _viewModel.UpdateAuthenticationState(true);
// });
HybridWebViewControl.Navigated += HybridWebViewControl_NavigatedAsync;
}
