From d72fef26d44e649f39a56730830148d48d77ee9e Mon Sep 17 00:00:00 2001
From: Alexander Gottwald <alexander.gottwald@s1999.tu-chemnitz.de>
Date: Tue, 5 Jul 2005 17:52:35 +0000
Subject: Fix simultanious presses of Left and Right Control and Shift keys.   
  https://bugs.freedesktop.org/show_bug.cgi?id=3677

---
 hw/xwin/ChangeLog    |  8 ++++++++
 hw/xwin/winkeybd.c   | 36 ++++++++++++++++++++++++++++++++++++
 hw/xwin/winkeybd.h   |  2 +-
 hw/xwin/winwndproc.c | 31 ++++++++++++++++++++++++++-----
 4 files changed, 71 insertions(+), 6 deletions(-)

(limited to 'hw/xwin')

diff --git a/hw/xwin/ChangeLog b/hw/xwin/ChangeLog
index 8ae8e54ae..6d06412d2 100644
--- a/hw/xwin/ChangeLog
+++ b/hw/xwin/ChangeLog
@@ -1,3 +1,11 @@
+2005-07-05  Alexander Gottwald  <ago at freedesktop dot org>
+
+	* winkeybd.c:
+	* winkeybd.h:
+	* winwndproc.c:
+	Fix simultanious presses of Left and Right Control and Shift keys.
+	https://bugs.freedesktop.org/show_bug.cgi?id=3677
+
 2005-07-05  Alexander Gottwald  <ago at freedesktop dot org>
 
 	* winmultiwindowwm.c:
diff --git a/hw/xwin/winkeybd.c b/hw/xwin/winkeybd.c
index e52337956..3756a4432 100644
--- a/hw/xwin/winkeybd.c
+++ b/hw/xwin/winkeybd.c
@@ -612,3 +612,39 @@ winSendKeyEvent (DWORD dwKey, Bool fDown)
   xCurrentEvent.u.u.detail = dwKey + MIN_KEYCODE;
   mieqEnqueue (&xCurrentEvent);
 }
+
+BOOL winCheckKeyPressed(WPARAM wParam, LPARAM lParam)
+{
+  switch (wParam)
+  {
+    case VK_CONTROL:
+      if ((lParam & 0x1ff0000) == 0x11d0000 && g_winKeyState[KEY_RCtrl])
+        return TRUE;
+      if ((lParam & 0x1ff0000) == 0x01d0000 && g_winKeyState[KEY_LCtrl])
+        return TRUE;
+      break;
+    case VK_SHIFT:
+      if ((lParam & 0x1ff0000) == 0x0360000 && g_winKeyState[KEY_ShiftR])
+        return TRUE;
+      if ((lParam & 0x1ff0000) == 0x02a0000 && g_winKeyState[KEY_ShiftL])
+        return TRUE;
+      break;
+    default:
+      return TRUE;
+  }
+  return FALSE;
+}
+
+/* Only on shift release message is sent even if both are pressed.
+ * Fix this here 
+ */
+void winFixShiftKeys (int iScanCode)
+{
+  if (GetKeyState (VK_SHIFT) & 0x8000)
+    return;
+
+  if (iScanCode == KEY_ShiftL && g_winKeyState[KEY_ShiftR])
+    winSendKeyEvent (KEY_ShiftR, FALSE);
+  if (iScanCode == KEY_ShiftR && g_winKeyState[KEY_ShiftL])
+    winSendKeyEvent (KEY_ShiftL, FALSE);
+}
diff --git a/hw/xwin/winkeybd.h b/hw/xwin/winkeybd.h
index 31c0cbc23..f42e09fd7 100644
--- a/hw/xwin/winkeybd.h
+++ b/hw/xwin/winkeybd.h
@@ -65,7 +65,7 @@ g_iKeyMap [] = {
   /* 13 */	VK_RETURN,	0,		KEY_KP_Enter,
   /* 14 */	0,		0,		0,
   /* 15 */	0,		0,		0,
-  /* 16 */	VK_SHIFT,	KEY_ShiftL,	KEY_ShiftR,
+  /* 16 */	VK_SHIFT,	0,		0,
   /* 17 */	VK_CONTROL,	0,		KEY_RCtrl,
   /* 18 */	VK_MENU,	0,		KEY_AltLang,
   /* 19 */	VK_PAUSE,	KEY_Pause,	0,
diff --git a/hw/xwin/winwndproc.c b/hw/xwin/winwndproc.c
index 5d9fe14c9..0864fc638 100644
--- a/hw/xwin/winwndproc.c
+++ b/hw/xwin/winwndproc.c
@@ -42,6 +42,12 @@
 #include "winconfig.h"
 #include "winmsg.h"
 
+#ifdef XKB
+extern BOOL winCheckKeyPressed(WPARAM wParam, LPARAM lParam);
+#endif
+extern void winFixShiftKeys (int iScanCode);
+
+
 /*
  * Global variables
  */
@@ -1014,11 +1020,22 @@ winWindowProc (HWND hwnd, UINT message,
        * Discard presses generated from Windows auto-repeat
        * ago: Only discard them if XKB is not disabled 
        */
-      if (!g_winInfo.xkb.disable) 
-        {  
-          if (lParam & (1<<30))
-	    return 0;
-        } 
+      if (!g_winInfo.xkb.disable && (lParam & (1<<30)))
+      {
+        switch (wParam)
+        {
+          /* ago: Pressing LControl while RControl is pressed is 
+           * Indicated as repeat. Fix this!
+           */
+          case VK_CONTROL:
+          case VK_SHIFT:
+            if (winCheckKeyPressed(wParam, lParam))
+              return 0;
+            break;
+          default:
+            return 0;
+        }
+      } 
 #endif 
       
       /* Discard fake Ctrl_L presses that precede AltGR on non-US keyboards */
@@ -1057,6 +1074,10 @@ winWindowProc (HWND hwnd, UINT message,
       /* Enqueue a keyup event */
       winTranslateKey (wParam, lParam, &iScanCode);
       winSendKeyEvent (iScanCode, FALSE);
+
+      /* Release all pressed shift keys */
+      if (wParam == VK_SHIFT) 
+        winFixShiftKeys (iScanCode);
       return 0;
 
     case WM_HOTKEY:
-- 
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