[ros-diffs] [reactos] 01/01: [SHELL32] Improve DragEnter of CFSDropTarget (#2073)

[Katayama Hirofumi MZ]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=cd75a87cfd5f78469143d…

commit cd75a87cfd5f78469143df50d947a0cd8f3210ef
Author:     Katayama Hirofumi MZ <katayama.hirofumi.mz(a)gmail.com>
AuthorDate: Tue Nov 26 17:34:24 2019 +0900
Commit:     GitHub <noreply(a)github.com>
CommitDate: Tue Nov 26 17:34:24 2019 +0900

    [SHELL32] Improve DragEnter of CFSDropTarget (#2073)
    
    Reduce failures of DragDrop testcase. CORE-11238
---
 dll/win32/shell32/droptargets/CFSDropTarget.cpp | 42 +++++++++++++++++++++++--
 1 file changed, 40 insertions(+), 2 deletions(-)

diff --git a/dll/win32/shell32/droptargets/CFSDropTarget.cpp
b/dll/win32/shell32/droptargets/CFSDropTarget.cpp
index bdf65e1fcc5..b8e67fd9adf 100644
--- a/dll/win32/shell32/droptargets/CFSDropTarget.cpp
+++ b/dll/win32/shell32/droptargets/CFSDropTarget.cpp
@@ -300,7 +300,41 @@ HRESULT WINAPI CFSDropTarget::DragEnter(IDataObject *pDataObject,
         m_fAcceptFmt = TRUE;
 
     m_grfKeyState = dwKeyState;
-    m_dwDefaultEffect = DROPEFFECT_MOVE;
+
+#define D_NONE DROPEFFECT_NONE
+#define D_COPY DROPEFFECT_COPY
+#define D_MOVE DROPEFFECT_MOVE
+#define D_LINK DROPEFFECT_LINK
+    m_dwDefaultEffect = *pdwEffect;
+    switch (*pdwEffect & (D_COPY | D_MOVE | D_LINK))
+    {
+        case D_COPY | D_MOVE:
+            if (dwKeyState & MK_CONTROL)
+                m_dwDefaultEffect = D_COPY;
+            else
+                m_dwDefaultEffect = D_MOVE;
+            break;
+        case D_COPY | D_MOVE | D_LINK:
+            if ((dwKeyState & (MK_SHIFT | MK_CONTROL)) == (MK_SHIFT | MK_CONTROL))
+                m_dwDefaultEffect = D_LINK;
+            else if ((dwKeyState & (MK_SHIFT | MK_CONTROL)) == MK_CONTROL)
+                m_dwDefaultEffect = D_COPY;
+            else
+                m_dwDefaultEffect = D_MOVE;
+            break;
+        case D_COPY | D_LINK:
+            if ((dwKeyState & (MK_SHIFT | MK_CONTROL)) == (MK_SHIFT | MK_CONTROL))
+                m_dwDefaultEffect = D_LINK;
+            else
+                m_dwDefaultEffect = D_COPY;
+            break;
+        case D_MOVE | D_LINK:
+            if ((dwKeyState & (MK_SHIFT | MK_CONTROL)) == (MK_SHIFT | MK_CONTROL))
+                m_dwDefaultEffect = D_LINK;
+            else
+                m_dwDefaultEffect = D_MOVE;
+            break;
+    }
 
     STGMEDIUM medium;
     if (SUCCEEDED(pDataObject->GetData(&fmt2, &medium)))
@@ -317,7 +351,11 @@ HRESULT WINAPI CFSDropTarget::DragEnter(IDataObject *pDataObject,
         ReleaseStgMedium(&medium);
     }
 
-    _QueryDrop(dwKeyState, pdwEffect);
+    if (!m_fAcceptFmt)
+        *pdwEffect = DROPEFFECT_NONE;
+    else
+        *pdwEffect = m_dwDefaultEffect;
+
     return S_OK;
 }