private void Dispose(bool isDisposing = true)
{
if (isDisposing)
{
lock (SyncRoot) {
if (this.isDisposing)
{
return;
}
this.isDisposing = true;
}
GC.SuppressFinalize(this);
}
var disposed = false;
void InternalDispose()
{
if (disposed)
{
return; // bail-out
}
disposed = true;
AsyncCancellationTokenSource?.Cancel();
WebViewInitialized = null;
BeforeNavigate = null;
BeforeResourceLoad = null;
Navigated = null;
LoadFailed = null;
DownloadProgressChanged = null;
DownloadCompleted = null;
DownloadCancelled = null;
JavascriptContextCreated = null;
TitleChanged = null;
UnhandledAsyncException = null;
JavascriptContextReleased = null;
foreach (var disposable in disposables.Concat(JsExecutors?.Values))
{
disposable?.Dispose();
}
Disposed?.Invoke();
}
if (JavascriptPendingCalls?.CurrentCount > 1)
{
// avoid dead-lock, wait for all pending calls to finish
Task.Run(() => {
JavascriptPendingCalls?.Signal(); // remove dummy entry
JavascriptPendingCalls?.Wait();
InternalDispose();
});
return;
}
InternalDispose();
}
public void Dispose()
{
lock (SyncRoot) {
if (isDisposing)
{
return;
}
isDisposing = true;
}
GC.SuppressFinalize(this);
var disposed = false;
void InternalDispose()
{
if (disposed)
{
return; // bail-out
}
disposed = true;
AsyncCancellationTokenSource.Cancel();
WebViewInitialized = null;
BeforeNavigate = null;
BeforeResourceLoad = null;
Navigated = null;
LoadFailed = null;
DownloadProgressChanged = null;
DownloadCompleted = null;
DownloadCancelled = null;
JavascriptContextCreated = null;
TitleChanged = null;
UnhandledAsyncException = null;
RenderProcessCrashed = null;
JavascriptContextReleased = null;
try {
foreach (var jsExecutor in JsExecutors.Values)
{
jsExecutor.Dispose();
}
} catch (Exception e) {
throw new Exception("Exception ocurred while disposing " + nameof(JsExecutors), e);
}
if (disposables != null)
{
foreach (var disposable in disposables)
{
disposable.Dispose();
}
}
Disposed?.Invoke();
}
// avoid dead-lock, wait for all pending calls to finish
JavascriptCallFinished += () => {
if (javascriptPendingCalls == 0)
{
Dispatcher.BeginInvoke((Action)InternalDispose);
}
};
if (javascriptPendingCalls > 0)
{
// JavascriptCallFinished event will trigger InternalDispose,
// this check must come after registering event to avoid losing the event call
return;
}
InternalDispose();
}
private void InnerDispose()
{
lock (SyncRoot) {
if (isDisposing)
{
return;
}
isDisposing = true;
}
var disposed = false;
void InternalDispose()
{
if (disposed)
{
return; // bail-out
}
disposed = true;
AsyncCancellationTokenSource?.Cancel();
chromium.JavascriptContextCreated -= OnJavascriptContextCreated;
chromium.JavascriptContextReleased -= OnJavascriptContextReleased;
WebViewInitialized = null;
BeforeNavigate = null;
BeforeResourceLoad = null;
Navigated = null;
LoadFailed = null;
DownloadProgressChanged = null;
DownloadCompleted = null;
DownloadCancelled = null;
JavascriptContextCreated = null;
TitleChanged = null;
UnhandledAsyncException = null;
JavascriptContextReleased = null;
// dispose the js executors before the browser to prevent (the browser) from throwing cancellation exceptions
DisposeJavascriptExecutors();
foreach (var disposable in disposables)
{
disposable?.Dispose();
}
Disposed?.Invoke();
}
if (JavascriptPendingCalls?.CurrentCount > 1)
{
// avoid dead-lock, wait for all pending calls to finish
Task.Run(() => {
JavascriptPendingCalls?.Signal(); // remove dummy entry
JavascriptPendingCalls?.Wait();
InternalDispose();
});
return;
}
InternalDispose();
}
