Aric Stewart : winemac.drv: Use NI_COMPOSITIONSTR/ CPS_CANCEL when composition string is empty.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 6d05fae6f7ebab83a2f1c6621d9619bbe91833fd
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=6d05fae6f7ebab83a2f1c6621d9619bbe91833fd

Author: Aric Stewart <aric at codeweavers.com>
Date:   Fri May 24 09:07:55 2019 -0500

winemac.drv: Use NI_COMPOSITIONSTR/CPS_CANCEL when composition string is empty.

This sends the expected WM_IME_ENDCOMPOSITION message.

Signed-off-by: Aric Stewart <aric at codeweavers.com>
Signed-off-by: Ken Thomases <ken at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/winemac.drv/ime.c | 32 +++++++++++++++++---------------
 1 file changed, 17 insertions(+), 15 deletions(-)

diff --git a/dlls/winemac.drv/ime.c b/dlls/winemac.drv/ime.c
index 1f5cb6b..a071408 100644
--- a/dlls/winemac.drv/ime.c
+++ b/dlls/winemac.drv/ime.c
@@ -901,6 +901,7 @@ static BOOL IME_SetCompositionString(void* hIMC, DWORD dwIndex, LPCVOID lpComp,
     DWORD flags = 0;
     WCHAR wParam  = 0;
     LPIMEPRIVATE myPrivate;
+    BOOL sendMessage = TRUE;
 
     TRACE("(%p, %d, %p, %d):\n", hIMC, dwIndex, lpComp, dwCompLen);
 
@@ -943,28 +944,29 @@ static BOOL IME_SetCompositionString(void* hIMC, DWORD dwIndex, LPCVOID lpComp,
 
             wParam = ((const WCHAR*)lpComp)[0];
             flags |= GCS_COMPCLAUSE | GCS_COMPATTR | GCS_DELTASTART;
+
+            if (cursor_valid)
+            {
+                LPCOMPOSITIONSTRING compstr;
+                compstr = ImmLockIMCC(lpIMC->hCompStr);
+                compstr->dwCursorPos = cursor_pos;
+                ImmUnlockIMCC(lpIMC->hCompStr);
+                flags |= GCS_CURSORPOS;
+            }
         }
         else
         {
-            newCompStr = updateCompStr(lpIMC->hCompStr, NULL, 0, &flags);
-            ImmDestroyIMCC(lpIMC->hCompStr);
-            lpIMC->hCompStr = newCompStr;
-        }
-
-        if (cursor_valid)
-        {
-            LPCOMPOSITIONSTRING compstr;
-            compstr = ImmLockIMCC(lpIMC->hCompStr);
-            compstr->dwCursorPos = cursor_pos;
-            ImmUnlockIMCC(lpIMC->hCompStr);
-            flags |= GCS_CURSORPOS;
+            NotifyIME(hIMC, NI_COMPOSITIONSTR, CPS_CANCEL, 0);
+            sendMessage = FALSE;
         }
 
     }
 
-    GenerateIMEMessage(hIMC, WM_IME_COMPOSITION, wParam, flags);
-    ImmUnlockIMCC(lpIMC->hPrivate);
-    UnlockRealIMC(hIMC);
+    if (sendMessage) {
+        GenerateIMEMessage(hIMC, WM_IME_COMPOSITION, wParam, flags);
+        ImmUnlockIMCC(lpIMC->hPrivate);
+        UnlockRealIMC(hIMC);
+    }
 
     return TRUE;
 }