Chromium: How to get all form of a loaded page - delphi

Question

I try to get the name of all forms of the loaded page. I have done this:
procedure TForm2.Button2Click(Sender: TObject);
var
L: TStringList;
begin
L := TStringList.Create;
try
Chromium1.Browser.MainFrame.VisitDomProc(
procedure (const doc: ICefDomDocument)
procedure IterateNodes(Node: ICefDomNode);
begin
if not Assigned(Node) then Exit;
repeat
if Node.ElementTagName = 'FORM' then
L.Add(Node.GetElementAttribute('name'));
if Node.HasChildren then IterateNodes(Node.FirstChild);
Node := Node.NextSibling;
until not Assigned(Node);
end;
begin
IterateNodes(doc.Body);
end
);
ShowMessage(L.Text);
finally
FreeAndNil(L);
end;
end;
But I don't have any result. Any idea?
Thanks

Answer 1

With XE2 Update 4
I have realized that the program flow continues when running the procedure parameter so that upon reaching the ShowMessage still has not run this procedure and therefore the TStringList is empty.
I have put a boolean variable control and it worked right, but this is not a elegant solution.
Here the new code:
procedure TForm2.Button2Click(Sender: TObject);
var
L: TStringList;
Finish: Boolean;
begin
L := TStringList.Create;
Finish := False;
try
Chromium1.Browser.MainFrame.VisitDomProc(
procedure (const doc: ICefDomDocument)
procedure IterateNodes(Node: ICefDomNode);
begin
if not Assigned(Node) then Exit;
repeat
if SameText(Node.ElementTagName, 'FORM') then
begin
L.Add(Node.GetElementAttribute('name'));
end;
if Node.HasChildren then
IterateNodes(Node.FirstChild);
Node := Node.NextSibling;
until not Assigned(Node);
end;
begin
IterateNodes(doc.Body);
Finish := True;
end
);
repeat Application.ProcessMessages until (Finish);
ShowMessage(L.Text);
finally
FreeAndNil(L);
end;
end;

Answer 2

I managed to get the whole page like this:
Inject a DOM element - text.
ChromiumWB.Browser.MainFrame.ExecuteJavaScript('$("body").prepend(''<input type="text" id="msoftval" value=""/>'')', '', 0);
Use jquery or js to get body html into injected element.
mResult := '';
ChromiumWB.Browser.MainFrame.ExecuteJavaScript('$("#msoftval").val($("body").html());', '', 0);
ChromiumWB.Browser.MainFrame.VisitDomProc(getResult);
while mResult = '' do Application.ProcessMessages;
Memo1.Text := mResult;
wait untill 'VisitDomProc' finish- make it sync.
procedure TForm44.getResult(const doc: ICefDomDocument);
var
q: ICefDomNode;
begin
q := doc.GetElementById('msoftval');
if Assigned(q) then
mResult := q.GetValue
else
mResult := '-';
end;