是否有当DOM在MSHTML IE8被修改的触发一个事件？ [英] Is there an event that fires when DOM is modified in MSHTML IE8?

问题描述

试图检测是否新元素被添加或从MSHTML DOM中除去。是否有将触发这样的事件？

Trying to detect if new elements are added or removed from the DOM in MSHTML. Is there such event that will fire?

http://msdn.microsoft.com /en-us/library/aa741877(v=VS.85).aspx

在IE9有IDOMMutationEvent :: initMutationEvent

In IE9 there is IDOMMutationEvent::initMutationEvent

http://msdn.microsoft.com /en-us/library/ff975905(v=vs.85).aspx

推荐答案

是的，现在可以在IE8，虽然它不是MSHTML事件结构的一部分，但辅助。

Yes, it is possible now in IE8, though it is not part of the MSHTML event structure, but Accessibility.

触发（EVENT_OBJECT_REORDER）在IE8是新​​的 - 请参阅<一个href=\"http://blogs.msdn.com/b/ie/archive/2008/12/10/new-accessibility-features-in-ie8.aspx?PageIndex=7\" rel=\"nofollow\">http://blogs.msdn.com/b/ie/archive/2008/12/10/new-accessibility-features-in-ie8.aspx?PageIndex=7

Trigger (EVENT_OBJECT_REORDER) is new in IE8 - See http://blogs.msdn.com/b/ie/archive/2008/12/10/new-accessibility-features-in-ie8.aspx?PageIndex=7

我们用了BHO使用它，但你同样可以勾IE浏览器之外，如果你选择。

We use it with out BHO, but you could equally hook outside of IE if you choose.

BHOClass::BHOClass()
{ 
if( TrackDHTML ) {
// end event is not used so +1.
// out of process notifications from accessibility
    m_eHook = ::SetWinEventHook(EVENT_OBJECT_REORDER, EVENT_OBJECT_REORDER+1, 0, MSAALib_WinEventProc, GetCurrentProcessId(), GetCurrentThreadId(), WINEVENT_OUTOFCONTEXT );
// in process injecting the dll into IE
//  m_eHook = ::SetWinEventHook(EVENT_OBJECT_REORDER, EVENT_OBJECT_REORDER+1, GetModuleHandle(L"yourhook.dll"), MSAALib_WinEventProc, GetCurrentProcessId(), GetCurrentThreadId(), WINEVENT_INCONTEXT );
}
}

这里是你可能如何看待可访问性和获取文档/浏览器

And here is how you might look at the accessibility and get the document/browser

static void CALLBACK MSAALib_WinEventProc(HWINEVENTHOOK hook, 
  DWORD event, 
  HWND hwnd,  // this appears to be the hwnd for the tab and not the specific frame
  LONG idObject,  
  LONG idChild,
  DWORD dwEventThread, // the thread being watched that triggered this call
  DWORD dwmsEventTime)
{
if( hwnd != NULL // exclude most mouse move 
    && ( OBJID_WINDOW == idObject ) // || OBJID_CLIENT == idObject )
    )
{ 
    switch( event ) {
        case EVENT_OBJECT_REORDER: break;
        case EVENT_OBJECT_SHOW: break;
        case EVENT_OBJECT_HIDE: break;
        default:
            return;
    }

    Log(L"Event START - (%ld) object %ld on window(0x%x)%ld thread (0x%x)%ld\n", event, idObject, hwnd, hwnd, dwEventThread, dwEventThread);
    CComPtr<IAccessible> acc;
    VARIANT varChild;
    AccessibleObjectFromEvent(hwnd, idObject, idChild, &acc, &varChild);
    if( acc ) {
        // step 1 - change from Accessibility interface to html to check we have right type of reorder message
        CComPtr<IServiceProvider> provider;
        HRESULT hr = acc->QueryInterface(IID_IServiceProvider,(LPVOID *)&provider);
        if( SUCCEEDED(hr) && provider ){
            CComPtr<IHTMLElement> spElement;
            hr = provider->QueryService(IID_IHTMLElement,IID_IHTMLElement,(LPVOID *)&spElement);

            if( spElement ) {
                // step 2 - for this doc element get the service provider and then the browser element
                CComPtr<IServiceProvider> provider2;
                HRESULT hr = spElement->QueryInterface(IID_IServiceProvider,(LPVOID *)&provider2);
                CComPtr<IServiceProvider> provider3;
                if( provider2 )
                    hr = provider2->QueryService(SID_STopLevelBrowser,IID_IServiceProvider,(LPVOID *)&provider3);
                CComPtr<IWebBrowser2> browser;
                if( provider3 )
                    hr = provider3->QueryService(SID_SWebBrowserApp,IID_IWebBrowser2,(LPVOID *)&browser);

                if( browser ) {
                    // step 3 - Do stuff 
                }
            }
        }
    }
    Log(L"Event DONE - (%ld) object %ld on window(0x%x)%ld thread (0x%x)%ld\n", event, idObject, hwnd, hwnd, dwEventThread, dwEventThread);
}
}

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