/// <summary>
/// 方法内部定义了死循环，用此循环来捕捉需要执行的js 代码
/// </summary>
private void InnerFlushScripts()
{
ScriptTask scriptTask = null;
List <ScriptTask> list = new List <ScriptTask>();
ScriptTask scriptTask2;
for (; ;) //
{
scriptTask2 = this.pendingScripts.Take(this.flushTaskCancelationToken.Token);
if (scriptTask2.WaitHandle != null)
{
break;
}
list.Add(scriptTask2);
if (this.pendingScripts.Count <= 0)
{
goto IL_42;
}
}
scriptTask = scriptTask2;
IL_42:
if (list.Count > 0)
{
Task <JavascriptResponse> task = this.OwnerWebView.chromium.EvaluateScriptAsync(JavascriptExecutor.WrapScriptWithErrorHandling(string.Join(";" + Environment.NewLine, from s in list
select s.Script)), this.OwnerWebView.DefaultScriptsExecutionTimeout);
task.Wait(this.flushTaskCancelationToken.Token);
JavascriptResponse response = task.Result;
if (!response.Success)
{
this.OwnerWebView.ExecuteWithAsyncErrorHandling(delegate
{
throw JavascriptExecutor.ParseResponseException(response);
});
}
}
if (scriptTask != null)
{
Task <JavascriptResponse> task2 = null;
try
{
IWebBrowser chromium = this.OwnerWebView.chromium;
string script = scriptTask.Script;
TimeSpan? timeout = scriptTask.Timeout;
task2 = chromium.EvaluateScriptAsync(script, (timeout != null) ? timeout : this.OwnerWebView.DefaultScriptsExecutionTimeout);
task2.Wait(this.flushTaskCancelationToken.Token);
scriptTask.Result = task2.Result;
}
catch (Exception exception)
{
if (task2 == null || !task2.IsCanceled)
{
scriptTask.Exception = exception;
}
}
finally
{
scriptTask.WaitHandle.Set();
}
}
}
public T EvaluateScript <T>(string script, TimeSpan?timeout = null)
{
this.EnsureWebViewNotDisposing();
string script2 = JavascriptExecutor.WrapScriptWithErrorHandling(script);
ScriptTask scriptTask = this.QueueScript(script2, timeout, true);
if (!this.flushRunning)
{
if (!scriptTask.WaitHandle.WaitOne(timeout ?? TimeSpan.FromSeconds(15.0)) || scriptTask.Result == null)
{
throw new JavascriptException("Timeout", "Javascript engine is not initialized", null);
}
}
else if (!scriptTask.WaitHandle.WaitOne() || scriptTask.Result == null)
{
throw new JavascriptException("Timeout", ((timeout != null) ? string.Format("More than {0}ms elapsed", timeout.Value.TotalMilliseconds) : "Timeout ocurred") + string.Format(" evaluating the script: '{0}'", script), null);
}
if (scriptTask.Exception != null)
{
throw scriptTask.Exception;
}
if (scriptTask.Result.Success)
{
return(this.GetResult <T>(scriptTask.Result.Result));
}
throw JavascriptExecutor.ParseResponseException(scriptTask.Result);
}
private ScriptTask QueueScript(string script, TimeSpan?timeout = null, bool awaitable = false)
{
this.EnsureWebViewNotDisposing();
ScriptTask scriptTask = new ScriptTask(script, timeout, awaitable);
this.pendingScripts.Add(scriptTask);
return(scriptTask);
}
