From: Jactry Zeng <wine@jactry.com>
Subject: [PATCH] riched20: Don't create too many IRichEditOle interface for a RichEdit. (try 4)
Message-Id: <53B18B7C.8010506@jactry.com>
Date: Tue, 01 Jul 2014 00:08:28 +0800

---
  dlls/riched20/editor.c        | 13 +++++++++++--
  dlls/riched20/editstr.h       |  1 +
  dlls/riched20/tests/richole.c | 19 ++++++++++++++++++-
  3 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/dlls/riched20/editor.c b/dlls/riched20/editor.c
index 2af2582..06d8690 100644
--- a/dlls/riched20/editor.c
+++ b/dlls/riched20/editor.c
@@ -2886,6 +2886,11 @@ static void ME_DestroyEditor(ME_TextEditor *editor)
   if(editor->lpOleCallback)
     IRichEditOleCallback_Release(editor->lpOleCallback);
   ITextHost_Release(editor->texthost);
+  if (editor->reOle)
+  {
+    IRichEditOle_Release(editor->reOle);
+    editor->reOle = NULL;
+  }
   OleUninitialize();
 
   FREE_OBJ(editor->pBuffer);
@@ -4467,8 +4472,12 @@ LRESULT ME_HandleMessage(ME_TextEditor *editor, UINT msg, WPARAM wParam,
   }
   case EM_GETOLEINTERFACE:
   {
-    LPVOID *ppvObj = (LPVOID*) lParam;
-    return CreateIRichEditOle(editor, ppvObj);
+    if (!editor->reOle)
+      if (!CreateIRichEditOle(editor, (LPVOID *)&editor->reOle))
+        return 0;
+    *(LPVOID *)lParam = editor->reOle;
+    IRichEditOle_AddRef(editor->reOle);
+    return 1;
   }
   case EM_GETPASSWORDCHAR:
   {
diff --git a/dlls/riched20/editstr.h b/dlls/riched20/editstr.h
index f139c29..4fd965c 100644
--- a/dlls/riched20/editstr.h
+++ b/dlls/riched20/editstr.h
@@ -388,6 +388,7 @@ typedef struct tagME_TextEditor
 {
   HWND hWnd, hwndParent;
   ITextHost *texthost;
+  IRichEditOle *reOle;
   BOOL bEmulateVersion10;
   ME_TextBuffer *pBuffer;
   ME_Cursor *pCursors;
diff --git a/dlls/riched20/tests/richole.c b/dlls/riched20/tests/richole.c
index 5a3ffbe..d10c063 100644
--- a/dlls/riched20/tests/richole.c
+++ b/dlls/riched20/tests/richole.c
@@ -92,15 +92,22 @@ static void release_interfaces(HWND *w, IRichEditOle **reOle, ITextDocument **tx
   ITextSelection_Release(*txtSel);
 }
 
+static ULONG get_refcount(IUnknown *iface)
+{
+  IUnknown_AddRef(iface);
+  return IUnknown_Release(iface);
+}
+
 static void test_Interfaces(void)
 {
-  IRichEditOle *reOle = NULL;
+  IRichEditOle *reOle = NULL, *reOle1 = NULL;
   ITextDocument *txtDoc = NULL;
   ITextSelection *txtSel = NULL;
   IUnknown *punk;
   HRESULT hres;
   LRESULT res;
   HWND w;
+  ULONG refcount;
 
   w = new_richedit(NULL);
   if (!w) {
@@ -111,6 +118,14 @@ static void test_Interfaces(void)
   res = SendMessageA(w, EM_GETOLEINTERFACE, 0, (LPARAM)&reOle);
   ok(res, "SendMessage\n");
   ok(reOle != NULL, "EM_GETOLEINTERFACE\n");
+  refcount = get_refcount((IUnknown *)reOle);
+  ok(refcount == 2, "got wrong ref count: %d\n", refcount);
+
+  res = SendMessageA(w, EM_GETOLEINTERFACE, 0, (LPARAM)&reOle1);
+  ok(res == 1, "SendMessage\n");
+  ok(reOle1 == reOle, "Should not return a new IRichEditOle interface\n");
+  refcount = get_refcount((IUnknown *)reOle);
+  ok(refcount == 3, "got wrong ref count: %d\n", refcount);
 
   hres = IRichEditOle_QueryInterface(reOle, &IID_ITextDocument,
                                  (void **) &txtDoc);
@@ -142,6 +157,8 @@ static void test_Interfaces(void)
 
   ITextDocument_Release(txtDoc);
   IRichEditOle_Release(reOle);
+  refcount = IRichEditOle_Release(reOle);
+  ok(refcount == 1, "got wrong ref count: %d\n", refcount);
   DestroyWindow(w);
 
   /* Methods should return CO_E_RELEASED if the backing document has