Implement a framework for hooking low-level windows key presses. Note: This

needs a little work still and it does nothing useful yet.

hw/xwin/InitInput.c

@@ -50,7 +50,7 @@ DISPATCH_PROC(winProcSetSelectionOwner);
  * Local global declarations
  */
 
-CARD32			g_c32LastInputEventTime = 0;
+CARD32				g_c32LastInputEventTime = 0;
 
 
 /*

hw/xwin/InitOutput.c

@@ -245,6 +245,9 @@ ddxGiveUp (void)
       g_pszCommandLine = NULL;
     }
 
+  /* Remove our keyboard hook if it is installed */
+  winRemoveKeyboardHookLL ();
+
   /* Tell Windows that we want to end the app */
   PostQuitMessage (0);
 }

hw/xwin/win.h

@@ -967,6 +967,17 @@ void
 winSendKeyEvent (DWORD dwKey, Bool fDown);
 
 
+/*
+ * winkeyhook.c
+ */
+
+Bool
+winInstallKeyboardHookLL ();
+
+void
+winRemoveKeyboardHookLL ();
+
+
 /*
  * winmisc.c
  */

hw/xwin/winclipboardunicode.c

@@ -50,13 +50,13 @@ winClipboardDetectUnicodeSupport (void)
   switch (osvi.dwPlatformId)
     {
     case VER_PLATFORM_WIN32_NT:
-      /* Engine 4 is supported on NT only */
+      /* Unicode supported on NT only */
       ErrorF ("DetectUnicodeSupport - Windows NT/2000/XP\n");
       fReturn = TRUE;
       break;
 
     case VER_PLATFORM_WIN32_WINDOWS:
-      /* Engine 4 is supported on NT only */
+      /* Unicode is not supported on non-NT */
       ErrorF ("DetectUnicodeSupport - Windows 95/98/Me\n");
       fReturn = FALSE;
       break;

hw/xwin/winglobals.c

@@ -59,9 +59,9 @@ int		g_iLogVerbose = 4;
 Bool		g_fLogInited = FALSE;
 char *		g_pszCommandLine = NULL;
 Bool		g_fUseMsg = FALSE;
-#ifdef XWIN_MULTIWINDOW
 DWORD		g_dwCurrentThreadID = 0;
-#endif
+Bool		g_fKeyboardHookLL = TRUE;
+HHOOK		g_hhookKeyboardLL = NULL;
 
 
 /*
@@ -110,9 +110,7 @@ Atom			g_atomLastOwnedSelection = None;
 void
 winInitializeGlobals (void)
 {
-#ifdef XWIN_MULTIWINDOW
   g_dwCurrentThreadID = GetCurrentThreadId ();
-#endif
 #ifdef XWIN_CLIPBOARD
   g_fClipboardLaunched = FALSE;
   g_fClipboardStarted = FALSE;

hw/xwin/winkeyhook.c

@@ -0,0 +1,127 @@
+/*
+ *Copyright (C) 2004 Harold L Hunt II All Rights Reserved.
+ *
+ *Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ *"Software"), to deal in the Software without restriction, including
+ *without limitation the rights to use, copy, modify, merge, publish,
+ *distribute, sublicense, and/or sell copies of the Software, and to
+ *permit persons to whom the Software is furnished to do so, subject to
+ *the following conditions:
+ *
+ *The above copyright notice and this permission notice shall be
+ *included in all copies or substantial portions of the Software.
+ *
+ *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
+ *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ *Except as contained in this notice, the name of Harold L Hunt II
+ *shall not be used in advertising or otherwise to promote the sale, use
+ *or other dealings in this Software without prior written authorization
+ *from Harold L Hunt II.
+ *
+ * Authors:	Harold L Hunt II
+ */
+
+#include "win.h"
+
+
+/*
+ * References to external symbols
+ */
+
+extern HHOOK			g_hhookKeyboardLL;
+extern DWORD			g_dwCurrentThreadID;
+
+
+/*
+ * Function prototypes
+ */
+
+static LRESULT CALLBACK
+winKeyboardMessageHookLL (int iCode, WPARAM wParam, LPARAM lParam);
+
+
+/*
+ * KeyboardMessageHook
+ */
+
+static LRESULT CALLBACK
+winKeyboardMessageHookLL (int iCode, WPARAM wParam, LPARAM lParam)
+{
+  BOOL			fEatKeystroke = FALSE;
+  PKBDLLHOOKSTRUCT	p = (PKBDLLHOOKSTRUCT) lParam;
+
+  /* Swallow keystrokes only for our app */
+  if (iCode == HC_ACTION)
+    {
+      switch (wParam)
+	{
+	case WM_KEYDOWN:  case WM_SYSKEYDOWN:
+	case WM_KEYUP:    case WM_SYSKEYUP: 
+	  p = (PKBDLLHOOKSTRUCT) lParam;
+
+	  fEatKeystroke = 
+	    (p->vkCode == VK_TAB) && ((p->flags & LLKHF_ALTDOWN) != 0);
+	  break;
+	}
+    }
+  
+  return (fEatKeystroke ? 1 : CallNextHookEx (NULL, iCode, wParam, 
+					      lParam));
+}
+
+
+/*
+ * Attempt to install the keyboard hook, return FALSE if it was not installed
+ */
+
+Bool
+winInstallKeyboardHookLL ()
+{
+  OSVERSIONINFO		osvi = {0};
+  
+  /* Get operating system version information */
+  osvi.dwOSVersionInfoSize = sizeof (osvi);
+  GetVersionEx (&osvi);
+
+  /* Branch on platform ID */
+  switch (osvi.dwPlatformId)
+    {
+    case VER_PLATFORM_WIN32_NT:
+      /* Low-level is supported on NT 4.0 SP3+ only */
+      /* TODO: Return FALSE on NT 4.0 with no SP, SP1, or SP2 */
+      break;
+
+    case VER_PLATFORM_WIN32_WINDOWS:
+      /* Low-level hook is not supported on non-NT */
+      return FALSE;
+    }
+
+  /* Install the hook only once */
+  if (!g_hhookKeyboardLL)
+    g_hhookKeyboardLL = SetWindowsHookEx (WH_KEYBOARD_LL,
+					  winKeyboardMessageHookLL,
+					  g_hInstance,
+					  0);
+
+  return TRUE;
+}
+
+
+/*
+ * Remove the keyboard hook if it is installed
+ */
+
+void
+winRemoveKeyboardHookLL ()
+{
+  if (g_hhookKeyboardLL)
+    UnhookWindowsHookEx (g_hhookKeyboardLL);
+  g_hhookKeyboardLL = NULL;
+}

hw/xwin/winmultiwindowwndproc.c

@@ -40,8 +40,9 @@
  * External global variables
  */
 
-extern Bool		g_fCursor;
-extern HICON		g_hiconX;
+extern Bool			g_fCursor;
+extern HICON			g_hiconX;
+extern Bool			g_fKeyboardHookLL;
 
 
 /*
@@ -59,7 +60,6 @@ static UINT_PTR		g_uipMousePollingTimerID = 0;
 #define WIN_MULTIWINDOW_SHAPE		YES
 
 
-
 /*
  * ConstrainSize - Taken from TWM sources - Respects hints for sizing
  */
@@ -626,11 +626,18 @@ winTopLevelWindowProc (HWND hwnd, UINT message,
 	break;
 
       winRestoreModeKeyStates ();
+
+      /* Add the keyboard hook if possible */
+      if (g_fKeyboardHookLL)
+	g_fKeyboardHookLL = winInstallKeyboardHookLL ();
       return 0;
       
     case WM_KILLFOCUS:
       /* Pop any pressed keys since we are losing keyboard focus */
       winKeybdReleaseKeys ();
+
+      /* Remove our keyboard hook if it is installed */
+      winRemoveKeyboardHookLL ();
       return 0;
 
     case WM_SYSDEADCHAR:      

hw/xwin/winwndproc.c

@@ -52,6 +52,7 @@ Bool				g_fCursor = TRUE;
 
 extern Bool			g_fClipboard;
 extern HWND			g_hDlgDepthChange;
+extern Bool			g_fKeyboardHookLL;
 
 
 /*
@@ -913,6 +914,10 @@ winWindowProc (HWND hwnd, UINT message,
 
       /* Restore the state of all mode keys */
       winRestoreModeKeyStates ();
+
+      /* Add the keyboard hook if possible */
+      if (g_fKeyboardHookLL)
+	g_fKeyboardHookLL = winInstallKeyboardHookLL ();
       return 0;
 
     case WM_KILLFOCUS:
@@ -921,6 +926,9 @@ winWindowProc (HWND hwnd, UINT message,
 
       /* Release any pressed keys */
       winKeybdReleaseKeys ();
+
+      /* Remove our keyboard hook if it is installed */
+      winRemoveKeyboardHookLL ();
       return 0;
 
     case WM_SYSKEYDOWN: