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Receive the document of a firefox MozillaWindowClass window

Posted on 2007-11-25
4
2,641 Views
Last Modified: 2013-12-08
I do the following code to receive the document of an HTML window in Internet-Explorer and it works OK.
But when I do the same on the MozillaWindowClass from FireFox
I receive hr=0x80004005

The code is:
 MSHTML::IHTMLDocument2Ptr spDoc;

 // Explicitly load MSAA so we know if it's installed
 if(! hInstOle)
 {
 CoInitialize( NULL );
  hInstOle= ::LoadLibrary( _T("OLEACC.DLL") );
 }
 if ( (hInstOle == NULL) || ( hWnd == NULL ) )return 1;
 LRESULT lRes;
 UINT nMsg = ::RegisterWindowMessage( _T("WM_HTML_GETOBJECT") );
 ::SendMessageTimeout( hWnd, nMsg, 0L, 0L, SMTO_ABORTIFHUNG, 1000, (DWORD*)&lRes );
      
 LPFNOBJECTFROMLRESULT pfObjectFromLresult = (LPFNOBJECTFROMLRESULT)::GetProcAddress( hInstOle, _T("ObjectFromLresult") );
 if ( pfObjectFromLresult == NULL )return 2;
 HRESULT hr;
 hr = (*pfObjectFromLresult)( lRes, IID_IHTMLDocument2, 0, (void**)&spDoc );


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Question by:VapiSoft
  • 2
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4 Comments
 
LVL 49

Accepted Solution

by:
DanRollins earned 500 total points
ID: 20392940
I have no experience in this area, but was asked to see what I could find out.

Firefox has its own DOM and it's not surprising if if the "accessibility hack" that works for IE fails for Firefox.  Here's an external forum post that claims they got something to work:

    Accessing an ISimpleDOMNode
    http://www.nabble.com/Accessing-an-ISimpleDOMNode-t792679.html

(most similar threads end with "please help! it still doesn't work!").

Here's the start of the mozilla wiki relevant to this topic.
   http://www.mozilla.org/access/windows/msaa-server

and a more direct link to the specifics:
  Accessibility/AT-Windows-API
   http://wiki.mozilla.org/Accessibility/AT-Windows-API#How_to_Find_the_Content_Window_and_Load_the_Document

I hope that helps!

-- Dan

Here's the apparently "functional" code from the firrst link (I did not test it):
if (windowType == "MozillaWindowClass") { 
    IAccessible *pAccessible; 
    HRESULT hr = AccessibleObjectFromWindow(hwnd, OBJID_CLIENT, 
IID_IAccessible,(void**)&pAccessible); 
    if (SUCCEEDED(hr) && pAccessible != NULL) { 
        std::cout << "succes accessing an iaccessible!\n"; 
 
        IServiceProvider *pServProv = NULL; 
        pAccessible->QueryInterface(IID_IServiceProvider, 
(void**)&pServProv); 
        if (pServProv) { 
            std::cout << "succes accessing an IServiceProvider!\n"; 
 
         ISimpleDOMDocument *pSimpleDOMNode; 
            const GUID refguid = {0x0c539790, 0x12e4, 0x11cf, 0xb6, 
0x61, 0x00, 0xaa, 0x00, 0x4c, 0xd6, 0xd8}; 
            HRESULT hr = pServProv->QueryService(refguid, 
IID_ISimpleDOMNode, (void**)&pSimpleDOMNode); 
            if (SUCCEEDED(hr) && pSimpleDOMNode != NULL) { 
         std::cout << "succes accessing an ISimpleDOMNode!\n"; 
            } 
        }   
    } 
}

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Author Comment

by:VapiSoft
ID: 20394167
I accepted the answer although it did not work for me.
I understand that it did not work for the guy that created it.
In any case, Iwork with MSHTML DOM for IE and I though that that Firefox supports it.
When I found out that they do not support it, it is too much work for me to support another DOM.
0
 
LVL 49

Expert Comment

by:DanRollins
ID: 20399842
>> I understand that it did not work for the guy that created it.

A later post in the same thread indicates that it worked after installin a newer version of FireFox.
=-=-=-=-=-=-=-=-=-=-=

I think that it goes without saying that to avoid cross-browser issues such as this, one alternative is to just pull the raw HTML from the server (rather than pulling the strings on an open instance of some browser).   Once you have the raw HTML, then you do whatever you want with it -- without worrying about the quirks of the browser -- which is really a rendering/display-oriented tool, anyway.
0
 

Author Comment

by:VapiSoft
ID: 20401163
This is an interesting point-of-view.
How do you "pool the raw HTML from the server (and make the browser show the chanhes)?
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