patch 8.0.1138: click in window toolbar starts Visual mode

Problem:    Click in window toolbar starts Visual mode.
Solution:   Add the MOUSE_WINBAR flag.

src/normal.c

@@ -2794,6 +2794,12 @@ do_mouse(
      */
     jump_flags = jump_to_mouse(jump_flags,
 			oap == NULL ? NULL : &(oap->inclusive), which_button);
+
+#ifdef FEAT_MENU
+    /* A click in the window toolbar has no side effects. */
+    if (jump_flags & MOUSE_WINBAR)
+	return FALSE;
+#endif
     moved = (jump_flags & CURSOR_MOVED);
     in_status_line = (jump_flags & IN_STATUS_LINE);
     in_sep_line = (jump_flags & IN_SEP_LINE);

src/ui.c

@@ -2611,6 +2611,9 @@ jump_to_mouse(
 {
     static int	on_status_line = 0;	/* #lines below bottom of window */
     static int	on_sep_line = 0;	/* on separator right of window */
+#ifdef FEAT_MENU
+    static int  in_winbar = FALSE;
+#endif
     static int	prev_row = -1;
     static int	prev_col = -1;
     static win_T *dragwin = NULL;	/* window being dragged */
@@ -2699,8 +2702,10 @@ jump_to_mouse(
 	    /* A click in the window toolbar does not enter another window or
 	     * change Visual highlighting. */
 	    winbar_click(wp, col);
-	    return IN_OTHER_WIN;
+	    in_winbar = TRUE;
+	    return IN_OTHER_WIN | MOUSE_WINBAR;
 	}
+	in_winbar = FALSE;
 #endif
 
 	/*
@@ -2829,6 +2834,13 @@ jump_to_mouse(
 	}
 	return IN_SEP_LINE;			/* Cursor didn't move */
     }
+#ifdef FEAT_MENU
+    else if (in_winbar)
+    {
+	/* After a click on the window toolbar don't start Visual mode. */
+	return IN_OTHER_WIN | MOUSE_WINBAR;
+    }
+#endif
     else /* keep_window_focus must be TRUE */
     {
 	/* before moving the cursor for a left click, stop Visual mode */

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1138,
 /**/
     1137,
 /**/

src/vim.h

@@ -1898,6 +1898,7 @@ typedef int sock_T;
 # define CURSOR_MOVED		0x100
 # define MOUSE_FOLD_CLOSE	0x200	/* clicked on '-' in fold column */
 # define MOUSE_FOLD_OPEN	0x400	/* clicked on '+' in fold column */
+# define MOUSE_WINBAR		0x800	/* in window toolbar */
 
 /* flags for jump_to_mouse() */
 # define MOUSE_FOCUS		0x01	/* need to stay in this window */