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	werner	46	/* 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