From:  Rajesh V R <rajeshvr83@gmail.com>
Date:  23 Feb 2017 19:23:23 Hong Kong Time
Newsgroup:  news.mozilla.org/mozilla.dev.accessibility
Subject:  

Re: QueryService() with IID_ISimpleDOMNode failed with e10s

NNTP-Posting-Host:  122.166.241.78

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 Firefox 49 is outdated.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 :
> > 
> > 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
> > dev-accessibility@lists.mozilla.org
> > https://lists.mozilla.org/listinfo/dev-accessibility