vnc: fix capslock tracking logic.

The capslock tracking logic added by commit
6b1325029d80455b9da7cd7bd84a88cb915b867c doesn't work correctly for vnc
clients without EXT_KEY_EVENT support.  The reason is that qemu converts
keysyms for letters to lowercase for the keysym2scancode lookup.  It
then also passes the lowercase value down to do_key_event(), but the
capslock tracking code needs it with the correct case to work properly.

This patch adds a new variable for the lowercase keysym so we'll keep
the unmodified value for do_key_event().

The keysym2scancode is not needed with EXT_KEY_EVENT capable clients
like any app based on the gtk-vnc widget, so I missed that case in
testing ...

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/vnc.c b/vnc.c
index 32c467880b..39c0d98609 100644
--- a/vnc.c
+++ b/vnc.c
@@ -1506,11 +1506,13 @@ static void do_key_event(VncState *vs, int down, int keycode, int sym)
 static void key_event(VncState *vs, int down, uint32_t sym)
 {
     int keycode;
+    int lsym = sym;
 
-    if (sym >= 'A' && sym <= 'Z' && is_graphic_console())
-        sym = sym - 'A' + 'a';
+    if (lsym >= 'A' && lsym <= 'Z' && is_graphic_console()) {
+        lsym = lsym - 'A' + 'a';
+    }
 
-    keycode = keysym2scancode(vs->vd->kbd_layout, sym & 0xFFFF);
+    keycode = keysym2scancode(vs->vd->kbd_layout, lsym & 0xFFFF);
     do_key_event(vs, down, keycode, sym);
 }