如何使用IAccessible在Firefox中访问文档的超文本标记语言

Question

我可以使用下面的代码从火狐窗口获取一个IAccessible对象：

Guid guid = new Guid("{618736E0-3C3D-11CF-810C-00AA00389B71}");
object obj = null;
int ret = AccessibleObjectFromWindow(hWnd, 
    (uint) OBJID.WINDOW, ref guid, ref obj);
Accessibility.IAccessible acc = (Accessibility.IAccessible)obj;

然而，我不确定从这里到哪里去。我需要从文档中获取完整的HTML。我知道IAccessible.get_accValue()方法，但我不太确定如何在火狐中使用它。任何帮助都将不胜感激。

Answer 1

显然，您不能使用IAccessible获得完整的HTML源。我找到了这个，但它在FF3.5中不起作用：

IServiceProvider *pServProv = NULL;
pAccessible->QueryInterface(IID_IServiceProvider, (void**)&pServProv);
ISimpleDOMNode *pSimpleDOMNode;
if (pServProv) {
  const GUID refguid = {0x0c539790, 0x12e4, 0x11cf, 0xb6, 0x61,
                        0x00, 0xaa, 0x00, 0x4c, 0xd6, 0xd8};
  HRESULT result = pServProv->QueryService(refguid, IID_ISimpleDOMNode,
                                           (void**)&pSimpleDOMNode);
  if (SUCCEEDED(hresult) && pSimpleDOMNode != NULL) {
    /* This is a Mozilla node! Use special ISimpleDOMNode methods described in
      ISimpleDOMNode.idl. */
  }
}

我还发现了这个，它在FF3.5中也不起作用：

HRESULT hr = AccessibleObjectFromWindow(hwnd, OBJID_CLIENT,
      IID_IAccessible, (void**)&pAccessible);
if (SUCCEEDED(hr) && pAccessible != NULL) {
HRESULT hr = pAccessible->QueryInterface(
      IID_ISimpleDOMNode, (void**)&pSimpleDOMNode);
}

我被卡住了。:(