Enable IAccessible for MinGW32, keep IAccessible2 disabled for MinGW

No surprise, the files generated by midl contains code that only
the MS compiler will understand.
However, since the generated files are only needed for IA2, we
can still compile the old IAccessible/MSAA implementation for mingw
(like it was before the introduction of IA2)

I used mingw 4.6.1 to test this.

Change-Id: Iad581f2fee087bd7b796ac5a01548f2fcacbd595
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/src/plugins/platforms/windows/accessible/qwindowsmsaaaccessible.cpp b/src/plugins/platforms/windows/accessible/qwindowsmsaaaccessible.cpp
index 8791bbdcfb..6c4d217cb4 100644
--- a/src/plugins/platforms/windows/accessible/qwindowsmsaaaccessible.cpp
+++ b/src/plugins/platforms/windows/accessible/qwindowsmsaaaccessible.cpp
@@ -224,6 +224,53 @@ void accessibleDebugClientCalls_helper(const char* funcName, const QAccessibleIn
 }
 #endif
 
+/**************************************************************\
+ *                                                             *
+ *                        IUnknown                             *
+ *                                                             *
+ **************************************************************/
+HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::QueryInterface(REFIID id, LPVOID *iface)
+{
+    *iface = 0;
+
+    QByteArray strIID = IIDToString(id);
+    if (!strIID.isEmpty()) {
+        QString ss; QDebug dbg(&ss); dbg << accessible;
+        accessibleDebug("QWindowsIA2Accessible::QI() - IID:%s, iface:%s ", strIID.constData(), qPrintable(ss));
+    }
+    if (id == IID_IUnknown) {
+        *iface = (IUnknown*)(IDispatch*)this;
+    } else if (id == IID_IDispatch) {
+        *iface = (IDispatch*)this;
+    } else if (id == IID_IAccessible) {
+        *iface = (IAccessible*)this;
+    } else if (id == IID_IOleWindow) {
+        *iface = (IOleWindow*)this;
+    }
+
+    if (*iface) {
+        AddRef();
+        return S_OK;
+    }
+
+    return E_NOINTERFACE;
+}
+
+ULONG STDMETHODCALLTYPE QWindowsMsaaAccessible::AddRef()
+{
+    return ++ref;
+}
+
+ULONG STDMETHODCALLTYPE QWindowsMsaaAccessible::Release()
+{
+    if (!--ref) {
+        delete this;
+        return 0;
+    }
+    return ref;
+}
+
+
 /*
   IDispatch
 */
@@ -1208,6 +1255,17 @@ HRESULT STDMETHODCALLTYPE QWindowsMsaaAccessible::ContextSensitiveHelp(BOOL)
     return S_OK;
 }
 
+#define IF_EQUAL_RETURN_IIDSTRING(id, iid) if (id == iid) return QByteArray(#iid)
+QByteArray QWindowsMsaaAccessible::IIDToString(REFIID id)
+{
+    IF_EQUAL_RETURN_IIDSTRING(id, IID_IUnknown);
+    IF_EQUAL_RETURN_IIDSTRING(id, IID_IDispatch);
+    IF_EQUAL_RETURN_IIDSTRING(id, IID_IAccessible);
+    IF_EQUAL_RETURN_IIDSTRING(id, IID_IOleWindow);
+
+    return QByteArray();
+}
+
 QT_END_NAMESPACE
 
 #endif //QT_NO_ACCESSIBILITY