private void Navigate(int attempts = ScreenCapturePanel.DEFAULT_CAPTURE_MAX_RETRY_ATTEMPTS)
{
// this is needed for a weird case where this panel has never been made visible before and
// the capture timer is asking for capture, without being made visible the WebView will start but
// never completes, so we conditionally make this visible to allow the WebView to render which
// will unblock its navigation.
Action doNavigate = () =>
{
this.logger.Verbose("Navigating to {0} for {1}", this.Location.Text, this.Config.PrettyName);
this.SafeViewport.Navigate(this.Location.Text);
};
if (!hasBeenVisible && !this.IsVisible)
{
this.logger.Info("Panel {0} is being asked to navigate, but it is not visible, forcing visibility", this.Config.PrettyName);
if (this.requestFocus(this))
{
this.hasBeenVisible = true;
TimerUtility.RunDelayedAction(() =>
{
this.releaseFocus(this);
// now we navigate as usual, navigate completion will acquire its own focus request.
doNavigate();
}, TimeSpan.FromMilliseconds(2000));
}
else if (attempts > 0)
{
this.logger.Warn($"Tried to force visibility for Panel {this.Config.PrettyName} but another panel is visible, {attempts} retry attempts remaining...");
TimerUtility.RunDelayedAction(() => this.Navigate(attempts - 1), TimeSpan.FromMilliseconds(2000));
}
else
{
this.logger.Warn($"Tried to force visibility for Panel {this.Config.PrettyName} but another panel is visible, aborting...");
this.CleanupCaptureRun(success: false);
}
}
else
{
doNavigate();
}
}
private void Viewport_NavigationCompletedImpl(int attempts = ScreenCapturePanel.DEFAULT_CAPTURE_MAX_RETRY_ATTEMPTS)
{
this.logger.Verbose($"running delayed capture with settle time of {this.appConfig.DefaultPageSettleDelay}...");
// we introduce an artificial delay before processing the capture.
// this is DUMB!, there's no definitive way to know if the page has "settled".
TimerUtility.RunDelayedAction(() =>
{
// note: removed && this.IsVisible() check here, maybe that is necessary?
if (this.requestFocus(this))
{
// delay one more tick so we give the control time to render
TimerUtility.RunSafeDelayedAction(() =>
{
this.HandleScreenCapture();
},
TimeSpan.FromMilliseconds(2000),
(error) =>
{
// HandleScreenCapture should be safe. no-op
if (this.IsCaptureInProgress)
{
this.CleanupCaptureRun(success: false);
}
});
}
else if (attempts > 0)
{
this.logger.Warn($"Panel {this.Config.PrettyName} attempting to perform screen capture, but another panel already is visible, will retry {attempts} attempts...");
// TODO: randomize the retry time?
this.Viewport_NavigationCompletedImpl(attempts - 1);
}
else
{
// could not get focus or we ran out of attempts
this.logger.Error($"Panel {this.Config.PrettyName} failed to get focus after {ScreenCapturePanel.DEFAULT_CAPTURE_MAX_RETRY_ATTEMPTS} attempts");
this.CleanupCaptureRun(success: false);
}
}, this.appConfig.DefaultPageSettleDelay);
}
private void Viewport_NewWindowRequested(object sender, WebViewControlNewWindowRequestedEventArgs e)
{
this.logger.Info($"New window requested... for {e.Uri}, navigating to location in the current view");
TimerUtility.RunDelayedAction(() => this.SafeViewport.Navigate(e.Uri), TimeSpan.FromMilliseconds(2000));
}
