/// <summary>
/// Visit the DOM in the remote browser's main frame.
/// Returns false if the remote browser is currently unavailable.
/// If this function returns false, then |callback| will not be called. Otherwise,
/// |callback| will be called according to the InvokeMode setting.
///
/// The document object passed to the callback represents a snapshot
/// of the DOM at the time the callback is executed.
/// DOM objects are only valid for the scope of the callback. Do not
/// keep references to or attempt to access any DOM objects outside the scope
/// of the callback.
/// Use with care:
/// The callback may never be called if the render process gets killed prematurely.
/// Do not keep a reference to the remote DOM or remote browser object after returning from the callback.
/// Do not block the callback since it blocks the renderer thread.
/// </summary>
/// <param name="callback"></param>
/// <returns></returns>
public bool VisitDom(Action <CfrDomDocument, CfrBrowser> callback)
{
var rb = remoteBrowser;
if (rb == null)
{
return(false);
}
try
{
var ctx = rb.CreateRemoteCallContext();
ctx.Enter();
try
{
var taskRunner = CfrTaskRunner.GetForThread(CfxThreadId.Renderer);
var task = new VisitDomTask(this, callback);
taskRunner.PostTask(task);
return(true);
}
finally
{
ctx.Exit();
}
}
catch (CfxRemotingException)
{
return(false);
}
}
/// <summary>
/// Visit the DOM in the remote browser's main frame.
/// Returns false if the remote browser is currently unavailable.
/// If this function returns false, then |callback| will not be called. Otherwise,
/// |callback| will be called according to the InvokeMode setting.
///
/// The document object passed to the callback represents a snapshot
/// of the DOM at the time the callback is executed.
/// DOM objects are only valid for the scope of the callback. Do not
/// keep references to or attempt to access any DOM objects outside the scope
/// of the callback.
/// Use with care:
/// The callback may never be called if the render process gets killed prematurely.
/// Do not keep a reference to the remote DOM or remote browser object after returning from the callback.
/// Do not block the callback since it blocks the renderer thread.
/// </summary>
/// <param name="callback"></param>
/// <returns></returns>
public bool VisitDom(Action<CfrDomDocument, CfrBrowser> callback)
{
var rb = remoteBrowser;
if (rb == null) return false;
try
{
var ctx = rb.CreateRemoteCallContext();
ctx.Enter();
try
{
var taskRunner = CfrTaskRunner.GetForThread(CfxThreadId.Renderer);
var task = new VisitDomTask(this, callback);
taskRunner.PostTask(task);
return true;
}
finally
{
ctx.Exit();
}
}
catch (CfxRemotingException)
{
return false;
}
}
