Add Low-Level hook for Windows keyboard events

windows, alt, and control keys are handled separately, before windows can get a chance to act on them. This makes win usable as an option key and prevents things like alt-esc from minimizing the window.
Some combos (alt-control-delete, windows-L, etc) cannot be blocked.

src/win_console.c

@@ -112,6 +112,7 @@ int main(int argc, char **argv)     {
   WNDCLASS wndclass;
   SIZE size;
   RECT rect;
+  HHOOK hook;
 
   wndclass.style = 0;
   wndclass.lpfnWndProc = (WNDPROC)win_event_handler;
@@ -151,9 +152,12 @@ int main(int argc, char **argv)     {
   SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), mode);
 
 
+  hook = SetWindowsHookEx(WH_KEYBOARD_LL, win_ll_keyboard, NULL, 0);
+
   gsportinit(hwnd);
   int ret =  gsplusmain(argc, argv);
 
+  UnhookWindowsHookEx(hook);
   UnregisterClass(wndclass.lpszClassName,GetModuleHandle(NULL));
 
   gsportshut();

src/win_generic.c

@@ -226,11 +226,6 @@ void win_event_key(HWND hwnd, UINT raw_vk, BOOL down, int repeat, UINT flags)
          vk, down, repeat, flags);
 #endif
 
-  /* remap a few keys here.. sigh */
-  if((vk & 0xff) == VK_APPS) {
-    /* remap to command */
-    vk = VK_MENU;
-  }
 
   if((vk & 0xff) == VK_CAPITAL) {
     // Windows gives us up-and-down events of the actual key
@@ -260,6 +255,44 @@ void win_event_key(HWND hwnd, UINT raw_vk, BOOL down, int repeat, UINT flags)
   printf("VK: %04x unknown\n", vk);
 }
 
+/* low-level hook for keyboard events, to bypass special handling of
+ * windows key, alt-escape, etc
+ */
+LRESULT CALLBACK win_ll_keyboard(int nCode, WPARAM wParam, LPARAM lParam) {
+  KBDLLHOOKSTRUCT *kb = (KBDLLHOOKSTRUCT *)lParam;
+  int down = 0;
+
+  if (nCode < 0 || GetFocus() == NULL) return CallNextHookEx(0, nCode, wParam, lParam);
+
+  if (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN) down = 1;
+
+  switch (kb->vkCode) {
+    case VK_LWIN:
+    case VK_RWIN:
+    case VK_MENU:
+    case VK_LMENU:
+    case VK_RMENU:
+    case VK_CONTROL:
+    case VK_LCONTROL:
+    case VK_RCONTROL:
+      if (nb_win32_key < MAX_EVENT) {
+
+        win32_keys[nb_win32_key].raw_vk = kb->vkCode;
+        win32_keys[nb_win32_key].down = down;
+        win32_keys[nb_win32_key].repeat = 0;
+        win32_keys[nb_win32_key].flags = kb->flags; /* same? */
+
+        nb_win32_key++;
+      }
+      return 1;
+      break;
+  }
+
+  return CallNextHookEx(0, nCode, wParam, lParam);
+}
+
+
+
 void win_event_quit(HWND hwnd)      {
   quitEmulator();
 }

src/win_keymap.h

@@ -4,7 +4,7 @@
 int g_a2_key_to_wsym[][3] = {
 	{ 0x35,	VK_ESCAPE,	0 },
 	{ 0x7a,	VK_F1,	0 },
-	{ 0x78,	VK_F2,	0 },	// OG Was 7B but F2 is defined has 0x78 in a2_key_to_ascii
+	{ 0x78,	VK_F2,	0 },
 	{ 0x63,	VK_F3,	0 },
 	{ 0x76,	VK_F4,	0 },
 	{ 0x60,	VK_F5,	0 },
@@ -18,7 +18,9 @@ int g_a2_key_to_wsym[][3] = {
 	{ 0x69,	VK_F13,	0 },
 	{ 0x6b,	VK_F14,	0 },
 	{ 0x71,	VK_F15,	0 },
-	{ 0x7f, VK_PAUSE, VK_CANCEL+0x100 },
+
+	{ 0x7f, VK_PAUSE,  VK_PAUSE+0x100 },
+	{ 0x7f, VK_CANCEL, VK_CANCEL+0x100 },
 
 	{ 0x32,	0xc0, 0 },		/* '`' */
 	{ 0x12,	'1', 0 },
@@ -35,10 +37,9 @@ int g_a2_key_to_wsym[][3] = {
 	{ 0x18,	0xbb, 0 },		/* '=' */
 	{ 0x33,	VK_BACK, 0 },		/* backspace */
 	{ 0x72,	VK_INSERT+0x100, 0 },	/* Insert key */
-/*	{ 0x73,	XK_Home, 0 },		alias VK_HOME to be KP_Equal! */
 	{ 0x74,	VK_PRIOR+0x100, 0 },	/* pageup */
 	{ 0x47,	VK_NUMLOCK, VK_NUMLOCK+0x100 },	/* clear */
-	{ 0x51,	VK_HOME+0x100, 0 },		/* KP_equal is HOME key */
+	{ 0x51,	VK_HOME+0x100, 0 },
 	{ 0x4b,	VK_DIVIDE, VK_DIVIDE+0x100 },
 	{ 0x43,	VK_MULTIPLY, VK_MULTIPLY+0x100 },
 
@@ -83,6 +84,8 @@ int g_a2_key_to_wsym[][3] = {
 	{ 0x45,	VK_ADD, 0 },
 
 	{ 0x38,	VK_SHIFT, 0 },
+	{ 0x38,	VK_LSHIFT, 0 },
+	{ 0x38,	VK_RSHIFT, 0 },
 	{ 0x06,	'Z', 0 },
 	{ 0x07,	'X', 0 },
 	{ 0x08,	'C', 0 },
@@ -99,18 +102,24 @@ int g_a2_key_to_wsym[][3] = {
 	{ 0x55,	VK_NUMPAD3, VK_NEXT },
 
 	{ 0x36,	VK_CONTROL, VK_CONTROL+0x100 },
-	{ 0x3a,	VK_SNAPSHOT+0x100, VK_MENU+0x100 },/* Opt=prntscrn or alt-r */
+	{ 0x36,	VK_LCONTROL, VK_LCONTROL+0x100 },
+	{ 0x36,	VK_RCONTROL, VK_RCONTROL+0x100 },
+	{ 0x3a,	VK_SNAPSHOT+0x100, 0 },/* Opt=prntscrn or alt-r */
 
-// OG ActiveGS map OA-CA to Win & AltKey
-#ifndef ACTIVEGS
-	{ 0x37,	VK_SCROLL, VK_MENU },		/* Command=scr_lock or alt-l */
-#else
-	{ 0x7f, VK_CANCEL, 0 },
-	{ 0x3A, VK_LWIN+0x100, VK_LWIN },
-	{ 0x37,	VK_MENU, 0 },		/* Command=alt-l */
-	{ 0x37,	VK_LMENU, 0 },		/* Command=alt-l */
+	/* LMENU/RMENU = alt key = command*/
+	/* LWIN / RWIN = windows key = option */
+	/* weird menu key = APPS = option */
+
+	{ 0x3A,	VK_LWIN, VK_LWIN+0x100 },
+	{ 0x3A,	VK_RWIN, VK_RWIN+0x100 },
+	{ 0x3A,	VK_APPS, VK_APPS+0x100 },
+	{ 0x37,	VK_MENU, VK_MENU+0x100 },
+	{ 0x37,	VK_LMENU, VK_LMENU+0x100 },
+	{ 0x37,	VK_RMENU, VK_RMENU+0x100 },
+
+
+#ifdef ACTIVEGS
 	{ 0x7F,	VK_SCROLL,0 },		/* RESET */
-	{ 0x36,	VK_LCONTROL, 0 },	// CTRL
 #endif
 
 	{ 0x31,	' ', 0 },
@@ -118,7 +127,7 @@ int g_a2_key_to_wsym[][3] = {
 	{ 0x3d,	VK_DOWN+0x100, 0 },
 	{ 0x3c,	VK_RIGHT+0x100, 0 },
 	{ 0x52,	VK_NUMPAD0, VK_INSERT },
-	{ 0x41,	VK_DECIMAL, VK_DECIMAL },
+	{ 0x41,	VK_DECIMAL, VK_DELETE },
 	{ 0x4c,	VK_RETURN+0x100, 0 },
 	{ -1, -1, -1 }
 };