xenocara/xserver/hw/xwin/winkeyhook.c

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/*
*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
*/
#ifdef HAVE_XWIN_CONFIG_H
#include <xwin-config.h>
#endif
#include "win.h"
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static HHOOK g_hhookKeyboardLL = NULL;
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/*
* Function prototypes
*/
static LRESULT CALLBACK
winKeyboardMessageHookLL(int iCode, WPARAM wParam, LPARAM lParam);
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#ifndef LLKHF_EXTENDED
#define LLKHF_EXTENDED 0x00000001
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#endif
#ifndef LLKHF_UP
#define LLKHF_UP 0x00000080
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#endif
/*
* KeyboardMessageHook
*/
static LRESULT CALLBACK
winKeyboardMessageHookLL(int iCode, WPARAM wParam, LPARAM lParam)
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{
BOOL fPassKeystroke = FALSE;
BOOL fPassAltTab = TRUE;
PKBDLLHOOKSTRUCT p = (PKBDLLHOOKSTRUCT) lParam;
HWND hwnd = GetActiveWindow();
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#ifdef XWIN_MULTIWINDOW
WindowPtr pWin = NULL;
winPrivWinPtr pWinPriv = NULL;
winPrivScreenPtr pScreenPriv = NULL;
winScreenInfo *pScreenInfo = NULL;
/* Check if the Windows window property for our X window pointer is valid */
if ((pWin = GetProp(hwnd, WIN_WINDOW_PROP)) != NULL) {
/* Get a pointer to our window privates */
pWinPriv = winGetWindowPriv(pWin);
/* Get pointers to our screen privates and screen info */
pScreenPriv = pWinPriv->pScreenPriv;
pScreenInfo = pScreenPriv->pScreenInfo;
if (pScreenInfo->fMultiWindow)
fPassAltTab = FALSE;
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}
#endif
/* Pass keystrokes on to our main message loop */
if (iCode == HC_ACTION) {
winDebug("winKeyboardMessageHook: vkCode: %08x scanCode: %08x\n",
(unsigned int)p->vkCode, (unsigned int)p->scanCode);
switch (wParam) {
case WM_KEYDOWN:
case WM_SYSKEYDOWN:
case WM_KEYUP:
case WM_SYSKEYUP:
fPassKeystroke =
(fPassAltTab &&
(p->vkCode == VK_TAB) && ((p->flags & LLKHF_ALTDOWN) != 0))
|| (p->vkCode == VK_LWIN) || (p->vkCode == VK_RWIN);
break;
}
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}
/*
* 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(hwnd, (UINT) wParam, (WPARAM) p->vkCode, lParamKey);
return 1;
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}
/* Call next hook */
return CallNextHookEx(NULL, iCode, wParam, lParam);
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}
/*
* Attempt to install the keyboard hook, return FALSE if it was not installed
*/
Bool
winInstallKeyboardHookLL(void)
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{
/* Install the hook only once */
if (!g_hhookKeyboardLL)
g_hhookKeyboardLL = SetWindowsHookEx(WH_KEYBOARD_LL,
winKeyboardMessageHookLL,
g_hInstance, 0);
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return TRUE;
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}
/*
* Remove the keyboard hook if it is installed
*/
void
winRemoveKeyboardHookLL(void)
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{
if (g_hhookKeyboardLL)
UnhookWindowsHookEx(g_hhookKeyboardLL);
g_hhookKeyboardLL = NULL;
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}