comctl32: Truncate the info tip text when using ANSI version messages.

dlls/comctl32/tests/tooltips.c

@@ -668,7 +668,7 @@ static void test_longtextA(void)
         toolinfoA.lpszText = bufA;
         SendMessageA(hwnd, TTM_ENUMTOOLSA, 0, (LPARAM)&toolinfoA);
         textlen = lstrlenA(toolinfoA.lpszText);
-        todo_wine ok(textlen == 80, "lpszText has %d chars\n", textlen);
+        ok(textlen == 80, "lpszText has %d chars\n", textlen);
         ok(toolinfoA.uId == 0x1234ABCD,
            "uId should be retrieved, got %p\n", (void*)toolinfoA.uId);
 
@@ -678,7 +678,7 @@ static void test_longtextA(void)
         toolinfoA.lpszText = bufA;
         SendMessageA(hwnd, TTM_GETTOOLINFOA, 0, (LPARAM)&toolinfoA);
         textlen = lstrlenA(toolinfoA.lpszText);
-        todo_wine ok(textlen == 80, "lpszText has %d chars\n", textlen);
+        ok(textlen == 80, "lpszText has %d chars\n", textlen);
 
         memset(bufA, 0, sizeof(bufA));
         toolinfoA.hwnd = NULL;
@@ -686,7 +686,7 @@ static void test_longtextA(void)
         toolinfoA.lpszText = bufA;
         SendMessageA(hwnd, TTM_GETTEXTA, 0, (LPARAM)&toolinfoA);
         textlen = lstrlenA(toolinfoA.lpszText);
-        todo_wine ok(textlen == 80, "lpszText has %d chars\n", textlen);
+        ok(textlen == 80, "lpszText has %d chars\n", textlen);
     }
 
     DestroyWindow(hwnd);

dlls/comctl32/tooltips.c

@@ -171,6 +171,8 @@ typedef struct
 #define ICON_HEIGHT 16
 #define ICON_WIDTH  16
 
+#define MAX_TEXT_SIZE_A 80 /* maximum retriving text size by ANSI message */
+
 static LRESULT CALLBACK
 TOOLTIPS_SubclassProc (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uId, DWORD_PTR dwRef);
 
@@ -954,8 +956,9 @@ TOOLTIPS_CopyInfoT (const TTTOOL_INFO *toolPtr, TTTOOLINFOW *ti, BOOL isW)
         else if (isW)
             strcpyW (ti->lpszText, toolPtr->lpszText);
         else
+            /* ANSI version, the buffer is maximum 80 bytes without null. */
             WideCharToMultiByte(CP_ACP, 0, toolPtr->lpszText, -1,
-                                (LPSTR)ti->lpszText, INFOTIPSIZE, NULL, NULL);
+                                (LPSTR)ti->lpszText, MAX_TEXT_SIZE_A, NULL, NULL);
     }
 }
 
@@ -1341,12 +1344,13 @@ TOOLTIPS_GetTextT (const TOOLTIPS_INFO *infoPtr, TTTOOLINFOW *ti, BOOL isW)
 
         /* NB this API is broken, there is no way for the app to determine
            what size buffer it requires nor a way to specify how long the
-           one it supplies is.  We'll assume it's up to INFOTIPSIZE */
+           one it supplies is.  According to the test result, it's up to
+           80 bytes by the ANSI version. */
 
         buffer[0] = '\0';
         TOOLTIPS_GetTipText(infoPtr, nTool, buffer);
         WideCharToMultiByte(CP_ACP, 0, buffer, -1, (LPSTR)ti->lpszText,
-                                                   INFOTIPSIZE, NULL, NULL);
+                                                   MAX_TEXT_SIZE_A, NULL, NULL);
     }
 
     return 0;