From: Connor McAdams <cmcadams@codeweavers.com>
Subject: [PATCH v2 1/2] oleacc: Implement AccessibleObjectFromEvent.
Message-Id: <20210525021524.668244-1-cmcadams@codeweavers.com>
Date: Mon, 24 May 2021 22:15:23 -0400

Signed-off-by: Connor McAdams <cmcadams@codeweavers.com>
---
 dlls/oleacc/main.c      | 52 +++++++++++++++++++++++++++++++++++++++++
 dlls/oleacc/oleacc.spec |  2 +-
 2 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/dlls/oleacc/main.c b/dlls/oleacc/main.c
index f6b66a8bcab..db05d9dac92 100644
--- a/dlls/oleacc/main.c
+++ b/dlls/oleacc/main.c
@@ -331,6 +331,58 @@ HRESULT WINAPI AccessibleObjectFromPoint( POINT ptScreen, IAccessible** ppacc, V
     return E_NOTIMPL;
 }
 
+HRESULT WINAPI AccessibleObjectFromEvent( HWND hwnd, DWORD dwObjectID, DWORD dwChildID,
+                             IAccessible** ppacc, VARIANT* pvarChild )
+{
+    IAccessible *iface = NULL;
+    IDispatch *disp = NULL;
+    VARIANT vid;
+    HRESULT hr;
+
+    TRACE("%p %d %d %p %p\n", hwnd, dwObjectID, dwChildID, ppacc, pvarChild);
+
+    hr = AccessibleObjectFromWindow(hwnd, dwObjectID, &IID_IAccessible, (void **)&iface);
+    if (!SUCCEEDED(hr))
+        return hr;
+
+    *ppacc = iface;
+    VariantInit(&vid);
+    V_VT(&vid) = VT_I4;
+    V_I4(&vid) = dwChildID;
+
+    /*
+     * FIXME: Should also probably handle the possibility that the child isn't
+     * an object itself.
+     */
+    hr = IAccessible_get_accChild(iface, vid, &disp);
+
+    /*
+     * If we fail to get a child with the given ChildID, we instead return the
+     * IAccessible interface we retrieved from AccessibleObjectFromWindow.
+     */
+    if (SUCCEEDED(hr))
+    {
+        hr = IDispatch_QueryInterface(disp, &IID_IAccessible, (void **)ppacc);
+        if (SUCCEEDED(hr))
+        {
+            V_I4(&vid) = CHILDID_SELF;
+            IAccessible_Release(iface);
+        }
+        else
+        {
+            *ppacc = iface;
+        }
+
+        IDispatch_Release(disp);
+    }
+
+    VariantInit(pvarChild);
+    V_VT(pvarChild) = VT_I4;
+    V_I4(pvarChild) = V_I4(&vid);
+
+    return S_OK;
+}
+
 HRESULT WINAPI AccessibleObjectFromWindow( HWND hwnd, DWORD dwObjectID,
                              REFIID riid, void** ppvObject )
 {
diff --git a/dlls/oleacc/oleacc.spec b/dlls/oleacc/oleacc.spec
index 4cff0b8effc..9ad6e915965 100644
--- a/dlls/oleacc/oleacc.spec
+++ b/dlls/oleacc/oleacc.spec
@@ -1,5 +1,5 @@
 @ stdcall AccessibleChildren(ptr long long ptr ptr)
-@ stub AccessibleObjectFromEvent
+@ stdcall AccessibleObjectFromEvent(ptr long long ptr ptr)
 @ stdcall AccessibleObjectFromPoint(int64 ptr ptr)
 @ stdcall AccessibleObjectFromWindow(ptr long ptr ptr)
 @ stdcall CreateStdAccessibleObject(ptr long ptr ptr)

-- 
2.25.1