我试图使用以下代码枚举DOM节点(在XE2下).
我从SO中给出的答案中借用了大部分内容,但出于某种原因,它没有做任何事情.
IOW,ProcessDOM()永远不会被调用.
而且,我在我的智慧结束.
有人能告诉我这里我做错了什么.
提前致谢.
procedure ProcessNode(ANode: ICefDomNode);
var
Node1: ICefDomNode;
begin
if Assigned(ANode) then begin
Node1 := ANode.FirstChild;
while Assigned(Node1) do begin
{Do stuff with node}
ProcessNode(Node1);
Node1 := Node1.NextSibling;
end;
end;
end;
procedure ProcessDOM(const ADocument: ICefDomDocument);
begin
ProcessNode(ADocument.Body);
end;
procedure TMainForm.Chrome1LoadEnd(Sender: TObject; const ABrowser: ICefABrowser; const AFrame: ICefAFrame; AStatus: Integer);
begin
if Assigned(AFrame) then AFrame.VisitDomProc(ProcessDOM);
end;
解决方法
我有同样的问题,我使用dcef3附带的演示guiclient.以下是有效的.
type TCustomRenderProcessHandler = class(TCefRenderProcessHandlerOwn)
protected
function OnProcessMessageReceived(const browser: ICefBrowser; sourceProcess: TCefProcessId; const message: ICefProcessMessage): Boolean; override;
end;
Chromium1.browser.SendProcessMessage(PID_RENDERER,TCefProcessMessageRef.New('visitdom'));
function TCustomRenderProcessHandler.OnProcessMessageReceived(browser: ICefBrowser; sourceProcess: TCefProcessId; message: ICefProcessMessage): Boolean;
begin
if (message.Name = 'visitdom') then begin
browser.MainFrame.VisitDomProc(
procedure(const doc: ICefDomDocument)
begin
ProcessNode(Doc.Body);
end);
Result := True;
end;
end;
initialization
CefRenderProcessHandler := TCustomRenderProcessHandler.Create;