trunk/PTD/PTD.cpp

/* PTD.cpp - Privacy Tray Dynamic
 *      Copyright (C) 2002-2009 Timo Schulz
 *
 * This file is part of WinPT.
 *
 * WinPT is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * WinPT is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <windows.h>
#include <stdio.h>

HINSTANCE glob_hinst;

/* We need a special section in the DLL for storing our shared data.
   This shared data is required by the hook function because that
   function is called in the context of the actual thread running the
   hook and thus we need a way to communicate the result of our hook
   function back to us.  We use a shared data segment for this. */
#ifdef __GNUC__
#define ATTR_SEC __attribute__((section (".SHARDAT"), shared))
#else
#define ATTR_SEC
#pragma data_seg(".SHARDAT")
#endif
static HHOOK cbt_hook      ATTR_SEC = NULL; /* CTB hook handle. */
static DWORD tray_proc_id  ATTR_SEC = 0;    /* WinPT PID */
static HWND  shell_traywnd ATTR_SEC = 0;    /* Tray window handle. */
static HWND  curr_focus    ATTR_SEC = NULL; /* Current window focus handle. */
static HWND  rebar_w32     ATTR_SEC = NULL;
static HWND  mstask_swc    ATTR_SEC = NULL;
static HWND  systab_c32    ATTR_SEC = NULL;
#ifndef __GNUC__
#pragma data_seg()
#endif
#undef ATTR_SEC

static unsigned *journ_keys = 0;
static unsigned keyidx = 0;
static unsigned nkeys = 0;
static HHOOK journ_hook = NULL;  /* Journaling hook  handle. */


static LRESULT CALLBACK
PTD_CBT_proc (int code, WPARAM wparam, LPARAM lparam)
{
    HWND curr_hwnd = NULL;      
    DWORD proc_id = 0;
    
    if (code >= 0 && code == HCBT_SETFOCUS) {
        /* A window is about to receive the keyboard focus */           
        
        curr_hwnd = (HWND)wparam;
        GetWindowThreadProcessId (curr_hwnd, &proc_id);
        /* Only if the current window is different from this window list,
           we set the new focus. For more information read the hint in 
           PTD_initialize. */
        if ((proc_id != tray_proc_id)
             && (curr_hwnd != NULL)
             && (curr_hwnd != curr_focus)
             && (curr_hwnd != shell_traywnd)
             && (curr_hwnd != systab_c32)
             && (curr_hwnd != mstask_swc)
             && (curr_hwnd != rebar_w32)) {
            curr_focus = curr_hwnd;
        }
    }
    
    return  CallNextHookEx (cbt_hook , code, wparam, lparam);
}


/* Return the last selected window */
extern "C" HWND
PTD_get_curr_hwnd (void)
{
    return curr_focus;
}


/* Initialize CTB hook and try to find the system windows. */
extern "C" BOOL
PTD_initialize (void)
{
    tray_proc_id = GetCurrentProcessId ();
    cbt_hook = SetWindowsHookEx (WH_CBT, PTD_CBT_proc, glob_hinst, 0);
    if (cbt_hook == NULL)
        return FALSE;
    
    /* Okay, what are we doing here:
     * In the past I used the Spy++ application to find out why the old current 
     * window doesn't work on so much systems. Now we try to use the computer 
     * based training hook, more precise the HCBT_SETFOCUS to find out the 
     * last window focus. But to succeed we need to ignore some windows 
     * because otherwise our own window or a window from the taskbar
     * would be recognized.
     *
     * Here is what the Spy++ says about the windows order:
     * Shell_TrayWnd
     *  \ ReBarWindow32
     *                \ MSTaskSwWClass
     *                               \ SysTabControl32
     * 
     * As a result we need to ignore those windows to prevent failured 
     * in the code.
     */
    shell_traywnd = FindWindowEx (NULL, NULL, "Shell_TrayWnd", NULL);
    rebar_w32 = FindWindowEx (shell_traywnd, NULL, "ReBarWindow32", NULL);
    mstask_swc = FindWindowEx (rebar_w32, NULL, "MSTaskSwWClass", NULL);
    systab_c32 = FindWindowEx (mstask_swc, NULL, "SysTabControl32", NULL);
    
    /*debug ("tray_proc_id=%u cbt_hook=%p shell_traywnd=%p rebar_w32=%p "
             "mstask_swc=%p systab_c32=%p",
             tray_proc_id, cbt_hook, shell_traywnd, rebar_w32, 
             mstask_swc, systab_c32);*/
    
    return TRUE;
}


/* Remove the CTB hook from the system and reset all variables. */
extern "C" void
PTD_delete (void)
{
    if (!cbt_hook)
        return;
    UnhookWindowsHookEx (cbt_hook);
    cbt_hook = NULL;
    shell_traywnd = NULL;
    tray_proc_id = 0;
}


/* Return if the CTB hook is currently used. */
extern "C" int
PTD_is_used (void)
{
    return shell_traywnd && cbt_hook;
}


static LRESULT CALLBACK 
PTD_playback_proc (int code, WPARAM wparam, LPARAM lparam)
{
    LPEVENTMSG em;
    
    if (code == HC_SKIP) {
        keyidx++;
        if (keyidx == nkeys) {
            UnhookWindowsHookEx (journ_hook);
            journ_hook = NULL;
        }
        return 0;
    }
    else if (code == HC_GETNEXT) {
        /* Here is an overview what the event message struct can contain:
         * message - WM_KEYUP, WM_KEYDOWN, WM_SYSKEYUP, WM_SYSKEYDOWN:
         * paramL - specifies the virtual key code of the key that was pressed.
         * paramH - specifies the scan code.                            
         */
        em = (LPEVENTMSG )lparam;
        if (journ_keys[keyidx] & 0x8000)
            em->message = journ_keys[keyidx] & 0x4000 ? WM_SYSKEYDOWN : WM_KEYDOWN;
        else 
            em->message = journ_keys[keyidx] & 0x4000 ? WM_SYSKEYUP : WM_KEYUP;
        em->paramL = LOBYTE( journ_keys[keyidx] )
            | (MapVirtualKey (LOBYTE (journ_keys[keyidx]), 0) << 8);
        em->paramH = 1;
        em->time = GetTickCount ();
        return 0;
    }
    
    return CallNextHookEx (journ_hook, code, wparam, lparam);
}


extern "C" BOOL
PTD_keyb_send (UINT *keys, UINT n_keys)
{
    MSG msg;
    journ_keys = keys;
    keyidx = 0;
    nkeys = n_keys;    
    
    if (journ_hook)
        return FALSE;
    
    while (GetAsyncKeyState (VK_MENU) & 0x8000
            || GetAsyncKeyState (VK_SHIFT) & 0x8000
            || GetAsyncKeyState (VK_CONTROL) & 0x8000) {
        if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) {
            if (msg.message == WM_QUIT) {
                PostMessage (msg.hwnd, msg.message, msg.wParam, msg.lParam);
                return FALSE;
            }
            TranslateMessage (&msg);
            DispatchMessage (&msg);
        }
    }
    journ_hook = SetWindowsHookEx (WH_JOURNALPLAYBACK,
                                   (HOOKPROC)PTD_playback_proc,
                                   glob_hinst, 0);
    if (journ_hook == NULL)
        return FALSE;
    
    while (journ_hook) {
        if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) {
            if (msg.message == WM_QUIT) {
                if (journ_hook)
                    UnhookWindowsHookEx (journ_hook);
                PostMessage (msg.hwnd, msg.message, msg.wParam, msg.wParam);
            }
            TranslateMessage (&msg);
            DispatchMessage (&msg);
        }
    }
    
    return TRUE;
}


/*FILE *fp;*/

extern "C" BOOL WINAPI 
DllMain (HINSTANCE hinst, DWORD reason, LPVOID reserv)
{
    switch (reason)  {
    case DLL_PROCESS_ATTACH: 
        glob_hinst = hinst;
        /*
        fp = fopen ("attach_pid.txt", "a+b");
        if (fp != NULL) {       
            fprintf (fp, "[+ %lu]\r\n", GetCurrentProcessId());
            fclose (fp);
        }*/      
        break;
       
    case DLL_PROCESS_DETACH:
        /*fp = fopen ("attach_pid.txt", "a+b");
        if (fp != NULL) {
            fprintf (fp, "[- %lu]\r\n", GetCurrentProcessId());
            fclose (fp);
        }*/
        break;
        
    case DLL_THREAD_ATTACH:  
    case DLL_THREAD_DETACH:  
        break;
        
    }
    
    return TRUE;
}
1	werner	46	/* PTD.cpp - Privacy Tray Dynamic
2	twoaday	325	* Copyright (C) 2002-2009 Timo Schulz
3	werner	46	*
4			* This file is part of WinPT.
5			*
6			* WinPT is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* WinPT is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*/
16			#ifdef HAVE_CONFIG_H
17			#include <config.h>
18			#endif
19
20			#include <windows.h>
21			#include <stdio.h>
22
23			HINSTANCE glob_hinst;
24
25	werner	61	/* We need a special section in the DLL for storing our shared data.
26	twoaday	261	This shared data is required by the hook function because that
27	werner	61	function is called in the context of the actual thread running the
28			hook and thus we need a way to communicate the result of our hook
29			function back to us. We use a shared data segment for this. */
30			#ifdef __GNUC__
31			#define ATTR_SEC __attribute__((section (".SHARDAT"), shared))
32			#else
33			#define ATTR_SEC
34	werner	46	#pragma data_seg(".SHARDAT")
35	werner	61	#endif
36			static HHOOK cbt_hook ATTR_SEC = NULL; /* CTB hook handle. */
37			static DWORD tray_proc_id ATTR_SEC = 0; /* WinPT PID */
38			static HWND shell_traywnd ATTR_SEC = 0; /* Tray window handle. */
39			static HWND curr_focus ATTR_SEC = NULL; /* Current window focus handle. */
40			static HWND rebar_w32 ATTR_SEC = NULL;
41			static HWND mstask_swc ATTR_SEC = NULL;
42			static HWND systab_c32 ATTR_SEC = NULL;
43			#ifndef __GNUC__
44	werner	46	#pragma data_seg()
45	werner	61	#endif
46			#undef ATTR_SEC
47	werner	46
48			static unsigned *journ_keys = 0;
49	twoaday	305	static unsigned keyidx = 0;
50	werner	46	static unsigned nkeys = 0;
51	twoaday	273	static HHOOK journ_hook = NULL; /* Journaling hook handle. */
52	werner	46
53
54	twoaday	248
55	werner	46	static LRESULT CALLBACK
56			PTD_CBT_proc (int code, WPARAM wparam, LPARAM lparam)
57			{
58			HWND curr_hwnd = NULL;
59			DWORD proc_id = 0;
60
61			if (code >= 0 && code == HCBT_SETFOCUS) {
62			/* A window is about to receive the keyboard focus */
63
64			curr_hwnd = (HWND)wparam;
65	twoaday	273	GetWindowThreadProcessId (curr_hwnd, &proc_id);
66	werner	46	/* Only if the current window is different from this window list,
67			we set the new focus. For more information read the hint in
68			PTD_initialize. */
69			if ((proc_id != tray_proc_id)
70			&& (curr_hwnd != NULL)
71			&& (curr_hwnd != curr_focus)
72			&& (curr_hwnd != shell_traywnd)
73			&& (curr_hwnd != systab_c32)
74			&& (curr_hwnd != mstask_swc)
75			&& (curr_hwnd != rebar_w32)) {
76			curr_focus = curr_hwnd;
77			}
78			}
79
80			return CallNextHookEx (cbt_hook , code, wparam, lparam);
81			}
82
83
84			/* Return the last selected window */
85			extern "C" HWND
86			PTD_get_curr_hwnd (void)
87			{
88			return curr_focus;
89			}
90
91
92			/* Initialize CTB hook and try to find the system windows. */
93			extern "C" BOOL
94			PTD_initialize (void)
95			{
96			tray_proc_id = GetCurrentProcessId ();
97			cbt_hook = SetWindowsHookEx (WH_CBT, PTD_CBT_proc, glob_hinst, 0);
98			if (cbt_hook == NULL)
99			return FALSE;
100
101			/* Okay, what are we doing here:
102			* In the past I used the Spy++ application to find out why the old current
103			* window doesn't work on so much systems. Now we try to use the computer
104			* based training hook, more precise the HCBT_SETFOCUS to find out the
105			* last window focus. But to succeed we need to ignore some windows
106			* because otherwise our own window or a window from the taskbar
107			* would be recognized.
108			*
109			* Here is what the Spy++ says about the windows order:
110			* Shell_TrayWnd
111			* \ ReBarWindow32
112			* \ MSTaskSwWClass
113			* \ SysTabControl32
114			*
115			* As a result we need to ignore those windows to prevent failured
116			* in the code.
117			*/
118			shell_traywnd = FindWindowEx (NULL, NULL, "Shell_TrayWnd", NULL);
119			rebar_w32 = FindWindowEx (shell_traywnd, NULL, "ReBarWindow32", NULL);
120			mstask_swc = FindWindowEx (rebar_w32, NULL, "MSTaskSwWClass", NULL);
121			systab_c32 = FindWindowEx (mstask_swc, NULL, "SysTabControl32", NULL);
122
123	twoaday	305	/*debug ("tray_proc_id=%u cbt_hook=%p shell_traywnd=%p rebar_w32=%p "
124			"mstask_swc=%p systab_c32=%p",
125			tray_proc_id, cbt_hook, shell_traywnd, rebar_w32,
126			mstask_swc, systab_c32);*/
127	werner	46
128			return TRUE;
129			}
130
131
132			/* Remove the CTB hook from the system and reset all variables. */
133			extern "C" void
134			PTD_delete (void)
135			{
136			if (!cbt_hook)
137			return;
138			UnhookWindowsHookEx (cbt_hook);
139			cbt_hook = NULL;
140			shell_traywnd = NULL;
141			tray_proc_id = 0;
142			}
143
144
145			/* Return if the CTB hook is currently used. */
146			extern "C" int
147			PTD_is_used (void)
148			{
149			return shell_traywnd && cbt_hook;
150			}
151
152
153			static LRESULT CALLBACK
154			PTD_playback_proc (int code, WPARAM wparam, LPARAM lparam)
155			{
156			LPEVENTMSG em;
157
158			if (code == HC_SKIP) {
159	twoaday	305	keyidx++;
160			if (keyidx == nkeys) {
161	werner	46	UnhookWindowsHookEx (journ_hook);
162			journ_hook = NULL;
163			}
164			return 0;
165			}
166			else if (code == HC_GETNEXT) {
167			/* Here is an overview what the event message struct can contain:
168			* message - WM_KEYUP, WM_KEYDOWN, WM_SYSKEYUP, WM_SYSKEYDOWN:
169			* paramL - specifies the virtual key code of the key that was pressed.
170			* paramH - specifies the scan code.
171			*/
172			em = (LPEVENTMSG )lparam;
173	twoaday	305	if (journ_keys[keyidx] & 0x8000)
174			em->message = journ_keys[keyidx] & 0x4000 ? WM_SYSKEYDOWN : WM_KEYDOWN;
175	werner	46	else
176	twoaday	305	em->message = journ_keys[keyidx] & 0x4000 ? WM_SYSKEYUP : WM_KEYUP;
177			em->paramL = LOBYTE( journ_keys[keyidx] )
178			\| (MapVirtualKey (LOBYTE (journ_keys[keyidx]), 0) << 8);
179	werner	46	em->paramH = 1;
180			em->time = GetTickCount ();
181			return 0;
182			}
183
184			return CallNextHookEx (journ_hook, code, wparam, lparam);
185	twoaday	248	}
186	werner	46
187
188
189			extern "C" BOOL
190			PTD_keyb_send (UINT *keys, UINT n_keys)
191			{
192			MSG msg;
193			journ_keys = keys;
194	twoaday	305	keyidx = 0;
195	twoaday	325	nkeys = n_keys;
196	werner	46
197			if (journ_hook)
198			return FALSE;
199
200			while (GetAsyncKeyState (VK_MENU) & 0x8000
201			\|\| GetAsyncKeyState (VK_SHIFT) & 0x8000
202			\|\| GetAsyncKeyState (VK_CONTROL) & 0x8000) {
203			if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) {
204			if (msg.message == WM_QUIT) {
205			PostMessage (msg.hwnd, msg.message, msg.wParam, msg.lParam);
206			return FALSE;
207			}
208			TranslateMessage (&msg);
209			DispatchMessage (&msg);
210			}
211			}
212			journ_hook = SetWindowsHookEx (WH_JOURNALPLAYBACK,
213			(HOOKPROC)PTD_playback_proc,
214			glob_hinst, 0);
215			if (journ_hook == NULL)
216			return FALSE;
217
218			while (journ_hook) {
219			if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) {
220			if (msg.message == WM_QUIT) {
221			if (journ_hook)
222			UnhookWindowsHookEx (journ_hook);
223			PostMessage (msg.hwnd, msg.message, msg.wParam, msg.wParam);
224			}
225			TranslateMessage (&msg);
226			DispatchMessage (&msg);
227			}
228			}
229
230			return TRUE;
231			}
232
233
234	twoaday	325	/FILE fp;*/
235	werner	46
236	twoaday	248	extern "C" BOOL WINAPI
237	werner	46	DllMain (HINSTANCE hinst, DWORD reason, LPVOID reserv)
238			{
239			switch (reason) {
240			case DLL_PROCESS_ATTACH:
241	twoaday	325	glob_hinst = hinst;
242			/*
243			fp = fopen ("attach_pid.txt", "a+b");
244			if (fp != NULL) {
245			fprintf (fp, "[+ %lu]\r\n", GetCurrentProcessId());
246			fclose (fp);
247			}*/
248	werner	46	break;
249	twoaday	325
250			case DLL_PROCESS_DETACH:
251			/*fp = fopen ("attach_pid.txt", "a+b");
252			if (fp != NULL) {
253			fprintf (fp, "[- %lu]\r\n", GetCurrentProcessId());
254			fclose (fp);
255			}*/
256			break;
257
258	werner	46	case DLL_THREAD_ATTACH:
259			case DLL_THREAD_DETACH:
260			break;
261	twoaday	325
262	werner	46	}
263	twoaday	325
264	werner	46	return TRUE;
265			}