diff options
Diffstat (limited to 'hw/xwin/winkeyhook.c')
| -rwxr-xr-x | hw/xwin/winkeyhook.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/hw/xwin/winkeyhook.c b/hw/xwin/winkeyhook.c new file mode 100755 index 000000000..60176d9ad --- /dev/null +++ b/hw/xwin/winkeyhook.c @@ -0,0 +1,170 @@ +/* + *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; +extern HWND g_hwndKeyboardFocus; + + +/* + * Function prototypes + */ + +static LRESULT CALLBACK +winKeyboardMessageHookLL (int iCode, WPARAM wParam, LPARAM lParam); + + +#ifndef LLKHF_EXTENDED +# define LLKHF_EXTENDED 0x00000001 +#endif +#ifndef LLKHF_UP +# define LLKHF_UP 0x00000080 +#endif + + +/* + * KeyboardMessageHook + */ + +static LRESULT CALLBACK +winKeyboardMessageHookLL (int iCode, WPARAM wParam, LPARAM lParam) +{ + BOOL fPassKeystroke = FALSE; + PKBDLLHOOKSTRUCT p = (PKBDLLHOOKSTRUCT) lParam; + + /* Pass keystrokes on to our main message loop */ + if (iCode == HC_ACTION) + { +#if 0 + ErrorF ("vkCode: %08x\tscanCode: %08x\n", p->vkCode, p->scanCode); +#endif + + switch (wParam) + { + case WM_KEYDOWN: case WM_SYSKEYDOWN: + case WM_KEYUP: case WM_SYSKEYUP: + fPassKeystroke = + ((p->vkCode == VK_TAB) && ((p->flags & LLKHF_ALTDOWN) != 0)) +#if 0 + || (p->vkCode == VK_LWIN) || (p->vkCode == VK_RWIN) +#endif + ; + break; + } + } + + /* + * Pass message on to our main message loop. + * We process this immediately with SendMessage so that the keystroke + * appears in, hopefully, the correct order. + */ + if (fPassKeystroke) + { + LPARAM lParamKey = 0x0; + + /* Construct the lParam from KBDLLHOOKSTRUCT */ + lParamKey = lParamKey | (0x0000FFFF & 0x00000001); /* Repeat count */ + lParamKey = lParamKey | (0x00FF0000 & (p->scanCode << 16)); + lParamKey = lParamKey + | (0x01000000 & ((p->flags & LLKHF_EXTENDED) << 23)); + lParamKey = lParamKey + | (0x20000000 + & ((p->flags & LLKHF_ALTDOWN) << 24)); + lParamKey = lParamKey | (0x80000000 & ((p->flags & LLKHF_UP) << 24)); + + /* Send message to our main window that has the keyboard focus */ + PostMessage (g_hwndKeyboardFocus, + (UINT) wParam, + (WPARAM) p->vkCode, + lParamKey); + + return 1; + } + + /* Call next hook */ + return 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; +} |