trunk/PTD/PTD.cpp

/* PTD.cpp - Privacy Tray Dynamic
 *      Copyright (C) 2002-2005 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with WinPT; if not, write to the Free Software Foundation, 
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

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

#include "wptJPG.h"

HINSTANCE glob_hinst;

/* We need a special section in the DLL for storing our shared data */
#pragma data_seg(".SHARDAT")
static HHOOK    cbt_hook = NULL;    /* CTB hook handle. */
static DWORD    tray_proc_id = 0;   /* WinPT PID */
static HWND     shell_traywnd = 0;  /* Tray window handle. */
static HWND     curr_focus = NULL;  /* Current window focus handle. */
static HWND     rebar_w32 = NULL;
static HWND     mstask_swc = NULL;
static HWND     systab_c32 = NULL;
#pragma data_seg()

static unsigned *journ_keys = 0;
static unsigned key_idx = 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);
    
    /*log_foo ("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) {
        key_idx++;
        if (key_idx == 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[key_idx] & 0x8000)
            em->message = journ_keys[key_idx] & 0x4000 ? WM_SYSKEYDOWN : WM_KEYDOWN;
        else 
            em->message = journ_keys[key_idx] & 0x4000 ? WM_SYSKEYUP : WM_KEYUP;
        em->paramL = LOBYTE( journ_keys[key_idx] )
            | (MapVirtualKey (LOBYTE (journ_keys[key_idx]), 0) << 8);
        em->paramH = 1;
        em->time = GetTickCount ();
        return 0;
    }
    
    return CallNextHookEx (journ_hook, code, wparam, lparam);
} /* PTD_Playback_proc */


extern "C" BOOL
PTD_keyb_send (UINT *keys, UINT n_keys)
{
    MSG msg;
    journ_keys = keys;
    key_idx = 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;
}


/* Return version of the PTD library. */
extern "C" const char *
PTD_get_version (void)
{
    return PACKAGE_VERSION;
}


/* Display a JPG picture in the given window at the given point. */
extern "C" int
PTD_jpg_show (HWND hwnd, POINT *p, LPCSTR name)
{
    CJPG jpg;
    HDC hdc;
    POINT p2;
    BOOL rc;

    rc = jpg.load (name);
    if (!rc)
        return -1; /* XXX: use real return code. */
    hdc = GetWindowDC (hwnd);
    rc = jpg.updateSizeOnDC (hdc);
    if (!rc) {
        ReleaseDC (hwnd, hdc);
        return -2; /* XXX: use real return code. */
    }

    p2.x = jpg.m_Width;
    p2.y = jpg.m_Height;
    rc = jpg.show (hdc, p, &p2, 0, 0);

    ReleaseDC (hwnd, hdc);
    jpg.freePictureData ();
    return rc;
}


BOOL WINAPI 
DllMain (HINSTANCE hinst, DWORD reason, LPVOID reserv)
{
    switch (reason)  {
    case DLL_PROCESS_ATTACH: 
        glob_hinst = hinst; 
        break;
    case DLL_THREAD_ATTACH:  
        break;
    case DLL_THREAD_DETACH:  
        break;
    case DLL_PROCESS_DETACH: 
        break;
    }
    return TRUE;
}

1	/* PTD.cpp - Privacy Tray Dynamic
2	* Copyright (C) 2002-2005 Timo Schulz
3	*
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	* You should have received a copy of the GNU General Public License
17	* along with WinPT; if not, write to the Free Software Foundation,
18	* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
19	*/
20
21	#ifdef HAVE_CONFIG_H
22	#include <config.h>
23	#endif
24
25	#include <windows.h>
26	#include <windows.h>
27	#include <stdio.h>
28	#include <ocidl.h>
29	#include <olectl.h>
30
31	#include "wptJPG.h"
32
33	HINSTANCE glob_hinst;
34
35	/* We need a special section in the DLL for storing our shared data */
36	#pragma data_seg(".SHARDAT")
37	static HHOOK cbt_hook = NULL; /* CTB hook handle. */
38	static DWORD tray_proc_id = 0; /* WinPT PID */
39	static HWND shell_traywnd = 0; /* Tray window handle. */
40	static HWND curr_focus = NULL; /* Current window focus handle. */
41	static HWND rebar_w32 = NULL;
42	static HWND mstask_swc = NULL;
43	static HWND systab_c32 = NULL;
44	#pragma data_seg()
45
46	static unsigned *journ_keys = 0;
47	static unsigned key_idx = 0;
48	static unsigned nkeys = 0;
49	static HHOOK journ_hook = NULL; /* Journaling hook handle. */
50
51
52	static LRESULT CALLBACK
53	PTD_CBT_proc (int code, WPARAM wparam, LPARAM lparam)
54	{
55	HWND curr_hwnd = NULL;
56	DWORD proc_id = 0;
57
58	if (code >= 0 && code == HCBT_SETFOCUS) {
59	/* A window is about to receive the keyboard focus */
60
61	curr_hwnd = (HWND)wparam;
62	GetWindowThreadProcessId( curr_hwnd, &proc_id );
63	/* Only if the current window is different from this window list,
64	we set the new focus. For more information read the hint in
65	PTD_initialize. */
66	if ((proc_id != tray_proc_id)
67	&& (curr_hwnd != NULL)
68	&& (curr_hwnd != curr_focus)
69	&& (curr_hwnd != shell_traywnd)
70	&& (curr_hwnd != systab_c32)
71	&& (curr_hwnd != mstask_swc)
72	&& (curr_hwnd != rebar_w32)) {
73	curr_focus = curr_hwnd;
74	}
75	}
76
77	return CallNextHookEx (cbt_hook , code, wparam, lparam);
78	}
79
80
81	/* Return the last selected window */
82	extern "C" HWND
83	PTD_get_curr_hwnd (void)
84	{
85	return curr_focus;
86	}
87
88
89	/* Initialize CTB hook and try to find the system windows. */
90	extern "C" BOOL
91	PTD_initialize (void)
92	{
93	tray_proc_id = GetCurrentProcessId ();
94	cbt_hook = SetWindowsHookEx (WH_CBT, PTD_CBT_proc, glob_hinst, 0);
95	if (cbt_hook == NULL)
96	return FALSE;
97
98	/* Okay, what are we doing here:
99	* In the past I used the Spy++ application to find out why the old current
100	* window doesn't work on so much systems. Now we try to use the computer
101	* based training hook, more precise the HCBT_SETFOCUS to find out the
102	* last window focus. But to succeed we need to ignore some windows
103	* because otherwise our own window or a window from the taskbar
104	* would be recognized.
105	*
106	* Here is what the Spy++ says about the windows order:
107	* Shell_TrayWnd
108	* \ ReBarWindow32
109	* \ MSTaskSwWClass
110	* \ SysTabControl32
111	*
112	* As a result we need to ignore those windows to prevent failured
113	* in the code.
114	*/
115	shell_traywnd = FindWindowEx (NULL, NULL, "Shell_TrayWnd", NULL);
116	rebar_w32 = FindWindowEx (shell_traywnd, NULL, "ReBarWindow32", NULL);
117	mstask_swc = FindWindowEx (rebar_w32, NULL, "MSTaskSwWClass", NULL);
118	systab_c32 = FindWindowEx (mstask_swc, NULL, "SysTabControl32", NULL);
119
120	/*log_foo ("tray_proc_id=%u cbt_hook=%p shell_traywnd=%p rebar_w32=%p "
121	"mstask_swc=%p systab_c32=%p",
122	tray_proc_id, cbt_hook, shell_traywnd, rebar_w32,
123	mstask_swc, systab_c32);*/
124
125	return TRUE;
126	}
127
128
129	/* Remove the CTB hook from the system and reset all variables. */
130	extern "C" void
131	PTD_delete (void)
132	{
133	if (!cbt_hook)
134	return;
135	UnhookWindowsHookEx (cbt_hook);
136	cbt_hook = NULL;
137	shell_traywnd = NULL;
138	tray_proc_id = 0;
139	}
140
141
142	/* Return if the CTB hook is currently used. */
143	extern "C" int
144	PTD_is_used (void)
145	{
146	return shell_traywnd && cbt_hook;
147	}
148
149
150	static LRESULT CALLBACK
151	PTD_playback_proc (int code, WPARAM wparam, LPARAM lparam)
152	{
153	LPEVENTMSG em;
154
155	if (code == HC_SKIP) {
156	key_idx++;
157	if (key_idx == nkeys) {
158	UnhookWindowsHookEx (journ_hook);
159	journ_hook = NULL;
160	}
161	return 0;
162	}
163	else if (code == HC_GETNEXT) {
164	/* Here is an overview what the event message struct can contain:
165	* message - WM_KEYUP, WM_KEYDOWN, WM_SYSKEYUP, WM_SYSKEYDOWN:
166	* paramL - specifies the virtual key code of the key that was pressed.
167	* paramH - specifies the scan code.
168	*/
169	em = (LPEVENTMSG )lparam;
170	if (journ_keys[key_idx] & 0x8000)
171	em->message = journ_keys[key_idx] & 0x4000 ? WM_SYSKEYDOWN : WM_KEYDOWN;
172	else
173	em->message = journ_keys[key_idx] & 0x4000 ? WM_SYSKEYUP : WM_KEYUP;
174	em->paramL = LOBYTE( journ_keys[key_idx] )
175	\| (MapVirtualKey (LOBYTE (journ_keys[key_idx]), 0) << 8);
176	em->paramH = 1;
177	em->time = GetTickCount ();
178	return 0;
179	}
180
181	return CallNextHookEx (journ_hook, code, wparam, lparam);
182	} /* PTD_Playback_proc */
183
184
185
186	extern "C" BOOL
187	PTD_keyb_send (UINT *keys, UINT n_keys)
188	{
189	MSG msg;
190	journ_keys = keys;
191	key_idx = 0;
192	nkeys = n_keys;
193
194	if (journ_hook)
195	return FALSE;
196
197	while (GetAsyncKeyState (VK_MENU) & 0x8000
198	\|\| GetAsyncKeyState (VK_SHIFT) & 0x8000
199	\|\| GetAsyncKeyState (VK_CONTROL) & 0x8000) {
200	if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) {
201	if (msg.message == WM_QUIT) {
202	PostMessage (msg.hwnd, msg.message, msg.wParam, msg.lParam);
203	return FALSE;
204	}
205	TranslateMessage (&msg);
206	DispatchMessage (&msg);
207	}
208	}
209	journ_hook = SetWindowsHookEx (WH_JOURNALPLAYBACK,
210	(HOOKPROC)PTD_playback_proc,
211	glob_hinst, 0);
212	if (journ_hook == NULL)
213	return FALSE;
214
215	while (journ_hook) {
216	if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) {
217	if (msg.message == WM_QUIT) {
218	if (journ_hook)
219	UnhookWindowsHookEx (journ_hook);
220	PostMessage (msg.hwnd, msg.message, msg.wParam, msg.wParam);
221	}
222	TranslateMessage (&msg);
223	DispatchMessage (&msg);
224	}
225	}
226
227	return TRUE;
228	}
229
230
231	/* Return version of the PTD library. */
232	extern "C" const char *
233	PTD_get_version (void)
234	{
235	return PACKAGE_VERSION;
236	}
237
238
239	/* Display a JPG picture in the given window at the given point. */
240	extern "C" int
241	PTD_jpg_show (HWND hwnd, POINT *p, LPCSTR name)
242	{
243	CJPG jpg;
244	HDC hdc;
245	POINT p2;
246	BOOL rc;
247
248	rc = jpg.load (name);
249	if (!rc)
250	return -1; /* XXX: use real return code. */
251	hdc = GetWindowDC (hwnd);
252	rc = jpg.updateSizeOnDC (hdc);
253	if (!rc) {
254	ReleaseDC (hwnd, hdc);
255	return -2; /* XXX: use real return code. */
256	}
257
258	p2.x = jpg.m_Width;
259	p2.y = jpg.m_Height;
260	rc = jpg.show (hdc, p, &p2, 0, 0);
261
262	ReleaseDC (hwnd, hdc);
263	jpg.freePictureData ();
264	return rc;
265	}
266
267
268
269	BOOL WINAPI
270	DllMain (HINSTANCE hinst, DWORD reason, LPVOID reserv)
271	{
272	switch (reason) {
273	case DLL_PROCESS_ATTACH:
274	glob_hinst = hinst;
275	break;
276	case DLL_THREAD_ATTACH:
277	break;
278	case DLL_THREAD_DETACH:
279	break;
280	case DLL_PROCESS_DETACH:
281	break;
282	}
283	return TRUE;
284	}
285