delphi – 枚举TChromium中的DOM节点

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;

delphi – 枚举TChromium中的DOM节点

解决方法

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