Re: QueryService() with IID_ISimpleDOMNode failed with e10s

Moving discussion to bug...

On 2/23/2017 5:27 AM, Alexander Surkov wrote:
> Cc'ing more folks.
>
> Aaron, do you have ideas why else [1] QueryService(IID_ISimpleDOMNode) 
> may fail? AT vendor complained about same issue too. It seems like the 
> issue is not restricted to any particular machine.
>
> Please feel free to move the discussion back to the bug.
>
> Thanks!
> Alex.
>
> [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1310166#c29
>
> On Thu, Feb 23, 2017 at 6:23 AM, Rajesh V R <[email protected] 
> <mailto:[email protected]>> wrote:
>
>     Hi Marco,
>
>     Thanks for your reply.
>
>     1. May I know when e10s completely supports Windows? We are facing
>     this issue only on Windows 7 machines. We tried with latest
>     version of Firefox (51.0.1).
>
>     2. May I know why it is working with Windows 8 and Windows 10?
>
>     Thanks,
>     Rajesh
>
>     On Wednesday, February 22, 2017 at 6:56:40 PM UTC+5:30, Marco Zehe
>     wrote:
>     > Hello Rajesh,
>     >
>     > 1. Firefox 49 is outdated.
>     >
>     > 2. No official version supports accessibility with E10S on in
>     Windows yet. If you need to use accessibility services of any
>     kind, please only use it with E10S off. This is a known problem
>     and won't be fixed in older versions of Firefox.
>     >
>     > Marco
>     >
>     >
>     > Von meinem iPad gesendet
>     >
>     > > Am 22.02.2017 um 07:42 schrieb Rajesh V R
>     <[email protected] <mailto:[email protected]>>:
>     > >
>     > > I am trying to find the URL from Mozilla window using VC++
>     project. For doing this, I used QueryService() API with parameter
>     IID_ISimpleDOMNode". But the API fails on Windows 7 machines (both
>     32 bit and 64 bit) with Mozilla Version- 49.0.1. Sample code is
>     given below:
>     > >
>     > >
>     > > // header files
>     > > #include "ISimpleDOMNode.h"
>     > > #include "ISimpleDOMText.h"
>     > > #include "ISimpleDOMDocument.h"
>     > >
>     > > // GUIDs
>     > > const GUID refguid = {0x0c539790, 0x12e4, 0x11cf, 0xb6, 0x61,
>     0x00, 0xaa, 0x00, 0x4c, 0xd6, 0xd8};
>     > > const IID IID_ISimpleDOMNode=
>     {0x1814ceeb,0x49e2,0x407f,0xaf,0x99,0xfa,0x75,0x5a,0x7d,0x26,0x07};
>     > > const IID IID_ISimpleDOMText=
>     {0x4e747be5,0x2052,0x4265,0x8a,0xf0,0x8e,0xca,0xd7,0xaa,0xd1,0xc0};
>     > > const IID IID_ISimpleDOMDocument=
>     {0x0D68D6D0,0xD93D,0x4d08,0xA3,0x0D,0xF0,0x0D,0xD1,0xF4,0x5B,0x24};
>     > >
>     > > Void FindURLfromWindow(HWND hwnd)
>     > > {
>     > >    try
>     > >    {
>     > >        if(hwnd)
>     > >        {
>     > >            IAccessible *pAccBrowser = NULL;
>     > >            HRESULT hr = AccessibleObjectFromWindow(hwnd,
>     OBJID_CLIENT, IID_IAccessible, (void**)&pAccBrowser);
>     > >            if(SUCCEEDED(hr) && (pAccBrowser))
>     > >            {
>     > >                VARIANT vtStart;
>     > >                VARIANT vtResult;
>     > >                vtStart.vt = VT_I4;
>     > >                vtStart.lVal = CHILDID_SELF;
>     > >                /////////////////////////////
>     > >                hr =
>     pAccBrowser->accNavigate(NAVRELATION_EMBEDS,vtStart,&vtResult);
>     > >                if(SUCCEEDED(hr))
>     > >                {
>     > >                    IDispatch *pDisp = vtResult.pdispVal;
>     > >                    IAccessible *pAccDoc = NULL;
>     > >                    hr =
>     pDisp->QueryInterface(IID_IAccessible,(void **)&pAccDoc);
>     > >                    if(SUCCEEDED(hr) && (pAccDoc))
>     > >                    {
>     > >                        hr =
>     pAccDoc->QueryInterface(IID_IServiceProvider, (void **)&pServProv);
>     > >                        if(SUCCEEDED(hr) && (pServProv))
>     > >                        {
>     > >                            ISimpleDOMNode *pNode = NULL;
>     > >                            hr =
>     pServProv->QueryService(refguid, IID_ISimpleDOMNode,(void
>     **)&pNode); //failed in Windows 7
>     > >                            if(SUCCEEDED(hr) && (pNode))
>     > >                            {
>     > > ISimpleDOMDocument *pDoc = NULL;
>     > >                                hr =
>     pNode->QueryInterface(IID_ISimpleDOMDocument, (void **)&pDoc);
>     > > if(SUCCEEDED(hr) && (pDoc))
>     > >                                {
>     > >                                    BSTR bstrUrl = NULL;
>     > >                                    hr = pDoc->get_URL(&bstrUrl);
>     > > if(SUCCEEDED(hr) && (bstrUrl))
>     > >                                    {
>     > > //success
>     > >                                    }
>     > >                                }
>     > >                            }
>     > >                        }
>     > >                    }
>     > >                }
>     > >            }
>     > >        }
>     > >    }
>     > >    catch(...)
>     > >    {
>     > >    }
>     > > }
>     > > //
>     > >
>     > > Kindly help me to solve this issue.
>     > > _______________________________________________
>     > > dev-accessibility mailing list
>     > > [email protected]
>     <mailto:[email protected]>
>     > > https://lists.mozilla.org/listinfo/dev-accessibility
>     <https://lists.mozilla.org/listinfo/dev-accessibility>
>
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