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
 */

#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 */
HWND
PTD_get_curr_hwnd (void)
{
    return curr_focus;
}


/* Initialize CTB hook and try to find the system windows. */
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. */
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. */
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 */


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. */
const char *
PTD_get_version (void)
{
    return "0.8.1";
}


/* Display a JPG picture in the given window at the given point. */
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	#include <windows.h>
22	#include <stdio.h>
23	#include <ocidl.h>
24	#include <olectl.h>
25
26	#include "wptJPG.h"
27
28	HINSTANCE glob_hinst;
29
30	/* We need a special section in the DLL for storing our shared data */
31	#pragma data_seg(".SHARDAT")
32	static HHOOK cbt_hook = NULL; /* CTB hook handle. */
33	static DWORD tray_proc_id = 0; /* WinPT PID */
34	static HWND shell_traywnd = 0; /* Tray window handle. */
35	static HWND curr_focus = NULL; /* Current window focus handle. */
36	static HWND rebar_w32 = NULL;
37	static HWND mstask_swc = NULL;
38	static HWND systab_c32 = NULL;
39	#pragma data_seg()
40
41	static unsigned *journ_keys = 0;
42	static unsigned key_idx = 0;
43	static unsigned nkeys = 0;
44	static HHOOK journ_hook = NULL; /* Journaling hook handle. */
45
46
47	static LRESULT CALLBACK
48	PTD_CBT_proc (int code, WPARAM wparam, LPARAM lparam)
49	{
50	HWND curr_hwnd = NULL;
51	DWORD proc_id = 0;
52
53	if (code >= 0 && code == HCBT_SETFOCUS) {
54	/* A window is about to receive the keyboard focus */
55
56	curr_hwnd = (HWND)wparam;
57	GetWindowThreadProcessId( curr_hwnd, &proc_id );
58	/* Only if the current window is different from this window list,
59	we set the new focus. For more information read the hint in
60	PTD_initialize. */
61	if ((proc_id != tray_proc_id)
62	&& (curr_hwnd != NULL)
63	&& (curr_hwnd != curr_focus)
64	&& (curr_hwnd != shell_traywnd)
65	&& (curr_hwnd != systab_c32)
66	&& (curr_hwnd != mstask_swc)
67	&& (curr_hwnd != rebar_w32)) {
68	curr_focus = curr_hwnd;
69	}
70	}
71
72	return CallNextHookEx (cbt_hook , code, wparam, lparam);
73	}
74
75
76	/* Return the last selected window */
77	HWND
78	PTD_get_curr_hwnd (void)
79	{
80	return curr_focus;
81	}
82
83
84	/* Initialize CTB hook and try to find the system windows. */
85	BOOL
86	PTD_initialize (void)
87	{
88	tray_proc_id = GetCurrentProcessId ();
89	cbt_hook = SetWindowsHookEx (WH_CBT, PTD_CBT_proc, glob_hinst, 0);
90	if (cbt_hook == NULL)
91	return FALSE;
92
93	/* Okay, what are we doing here:
94	* In the past I used the Spy++ application to find out why the old current
95	* window doesn't work on so much systems. Now we try to use the computer
96	* based training hook, more precise the HCBT_SETFOCUS to find out the
97	* last window focus. But to succeed we need to ignore some windows
98	* because otherwise our own window or a window from the taskbar
99	* would be recognized.
100	*
101	* Here is what the Spy++ says about the windows order:
102	* Shell_TrayWnd
103	* \ ReBarWindow32
104	* \ MSTaskSwWClass
105	* \ SysTabControl32
106	*
107	* As a result we need to ignore those windows to prevent failured
108	* in the code.
109	*/
110	shell_traywnd = FindWindowEx (NULL, NULL, "Shell_TrayWnd", NULL);
111	rebar_w32 = FindWindowEx (shell_traywnd, NULL, "ReBarWindow32", NULL);
112	mstask_swc = FindWindowEx (rebar_w32, NULL, "MSTaskSwWClass", NULL);
113	systab_c32 = FindWindowEx (mstask_swc, NULL, "SysTabControl32", NULL);
114
115	/*log_foo ("tray_proc_id=%u cbt_hook=%p shell_traywnd=%p rebar_w32=%p "
116	"mstask_swc=%p systab_c32=%p",
117	tray_proc_id, cbt_hook, shell_traywnd, rebar_w32,
118	mstask_swc, systab_c32);*/
119
120	return TRUE;
121	}
122
123
124	/* Remove the CTB hook from the system and reset all variables. */
125	void
126	PTD_delete (void)
127	{
128	if (!cbt_hook)
129	return;
130	UnhookWindowsHookEx (cbt_hook);
131	cbt_hook = NULL;
132	shell_traywnd = NULL;
133	tray_proc_id = 0;
134	}
135
136
137	/* Return if the CTB hook is currently used. */
138	int
139	PTD_is_used (void)
140	{
141	return shell_traywnd && cbt_hook;
142	}
143
144
145	static LRESULT CALLBACK
146	PTD_playback_proc (int code, WPARAM wparam, LPARAM lparam)
147	{
148	LPEVENTMSG em;
149
150	if (code == HC_SKIP) {
151	key_idx++;
152	if (key_idx == nkeys) {
153	UnhookWindowsHookEx (journ_hook);
154	journ_hook = NULL;
155	}
156	return 0;
157	}
158	else if (code == HC_GETNEXT) {
159	/* Here is an overview what the event message struct can contain:
160	* message - WM_KEYUP, WM_KEYDOWN, WM_SYSKEYUP, WM_SYSKEYDOWN:
161	* paramL - specifies the virtual key code of the key that was pressed.
162	* paramH - specifies the scan code.
163	*/
164	em = (LPEVENTMSG )lparam;
165	if (journ_keys[key_idx] & 0x8000)
166	em->message = journ_keys[key_idx] & 0x4000 ? WM_SYSKEYDOWN : WM_KEYDOWN;
167	else
168	em->message = journ_keys[key_idx] & 0x4000 ? WM_SYSKEYUP : WM_KEYUP;
169	em->paramL = LOBYTE( journ_keys[key_idx] )
170	\| (MapVirtualKey (LOBYTE (journ_keys[key_idx]), 0) << 8);
171	em->paramH = 1;
172	em->time = GetTickCount ();
173	return 0;
174	}
175
176	return CallNextHookEx (journ_hook, code, wparam, lparam);
177	} /* PTD_Playback_proc */
178
179
180
181	BOOL
182	PTD_keyb_send (UINT *keys, UINT n_keys)
183	{
184	MSG msg;
185	journ_keys = keys;
186	key_idx = 0;
187	nkeys = n_keys;
188
189	if (journ_hook)
190	return FALSE;
191
192	while (GetAsyncKeyState (VK_MENU) & 0x8000
193	\|\| GetAsyncKeyState (VK_SHIFT) & 0x8000
194	\|\| GetAsyncKeyState (VK_CONTROL) & 0x8000) {
195	if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) {
196	if (msg.message == WM_QUIT) {
197	PostMessage (msg.hwnd, msg.message, msg.wParam, msg.lParam);
198	return FALSE;
199	}
200	TranslateMessage (&msg);
201	DispatchMessage (&msg);
202	}
203	}
204	journ_hook = SetWindowsHookEx (WH_JOURNALPLAYBACK,
205	(HOOKPROC)PTD_playback_proc,
206	glob_hinst, 0);
207	if (journ_hook == NULL)
208	return FALSE;
209
210	while (journ_hook) {
211	if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) {
212	if (msg.message == WM_QUIT) {
213	if (journ_hook)
214	UnhookWindowsHookEx (journ_hook);
215	PostMessage (msg.hwnd, msg.message, msg.wParam, msg.wParam);
216	}
217	TranslateMessage (&msg);
218	DispatchMessage (&msg);
219	}
220	}
221
222	return TRUE;
223	}
224
225
226	/* Return version of the PTD library. */
227	const char *
228	PTD_get_version (void)
229	{
230	return "0.8.1";
231	}
232
233
234	/* Display a JPG picture in the given window at the given point. */
235	int
236	PTD_jpg_show (HWND hwnd, POINT *p, LPCSTR name)
237	{
238	CJPG jpg;
239	HDC hdc;
240	POINT p2;
241	BOOL rc;
242
243	rc = jpg.load (name);
244	if (!rc)
245	return -1; /* XXX: use real return code. */
246	hdc = GetWindowDC (hwnd);
247	rc = jpg.updateSizeOnDC (hdc);
248	if (!rc) {
249	ReleaseDC (hwnd, hdc);
250	return -2; /* XXX: use real return code. */
251	}
252
253	p2.x = jpg.m_Width;
254	p2.y = jpg.m_Height;
255	rc = jpg.show (hdc, p, &p2, 0, 0);
256
257	ReleaseDC (hwnd, hdc);
258	jpg.freePictureData ();
259	return rc;
260	}
261
262
263
264	BOOL WINAPI
265	DllMain (HINSTANCE hinst, DWORD reason, LPVOID reserv)
266	{
267	switch (reason) {
268	case DLL_PROCESS_ATTACH:
269	glob_hinst = hinst;
270	break;
271	case DLL_THREAD_ATTACH:
272	break;
273	case DLL_THREAD_DETACH:
274	break;
275	case DLL_PROCESS_DETACH:
276	break;
277	}
278	return TRUE;
279	}
280