Re: QueryService() with IID_ISimpleDOMNode failed with e10s

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 Firefox 49 is outdated.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]>:
> 
> 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.
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