ServerExe/HookDll/hookdll.c

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Seamless windows - Remote server hook DLL

   Based on code copyright (C) 2004-2005 Martin Wickett

   Copyright (C) Peter Åstrand <astrand@cendio.se> 2005-2006
   Copyright (C) Pierre Ossman <ossman@cendio.se> 2006

   This program 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.

   This program 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 this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <stdio.h>
#include <stdarg.h>

#include <windows.h>
#include <winuser.h>

#include "../vchannel.h"

#define DLL_EXPORT __declspec(dllexport)

#ifdef __GNUC__
#define SHARED __attribute__((section ("SHAREDDATA"), shared))
#else
#define SHARED
#endif

// Shared DATA
#pragma data_seg ( "SHAREDDATA" )

// this is the total number of processes this dll is currently attached to
int g_instance_count SHARED = 0;

// blocks for locally generated events
HWND g_block_move_hwnd SHARED = NULL;
unsigned int g_block_move_serial SHARED = 0;
RECT g_block_move SHARED = { 0, 0, 0, 0 };

unsigned int g_blocked_zchange_serial SHARED = 0;
HWND g_blocked_zchange[2] SHARED = { NULL, NULL };

unsigned int g_blocked_focus_serial SHARED = 0;
HWND g_blocked_focus SHARED = NULL;

unsigned int g_blocked_state_serial SHARED = 0;
HWND g_blocked_state_hwnd SHARED = NULL;
int g_blocked_state SHARED = -1;

#pragma data_seg ()

#pragma comment(linker, "/section:SHAREDDATA,rws")

#define FOCUS_MSG_NAME "WM_SEAMLESS_FOCUS"
static UINT g_wm_seamless_focus;

static HHOOK g_cbt_hook = NULL;
static HHOOK g_wndproc_hook = NULL;
static HHOOK g_wndprocret_hook = NULL;

static HINSTANCE g_instance = NULL;

static HANDLE g_mutex = NULL;

static void
update_position(HWND hwnd)
{
        RECT rect, blocked;
        HWND blocked_hwnd;
        unsigned int serial;

        WaitForSingleObject(g_mutex, INFINITE);
        blocked_hwnd = g_block_move_hwnd;
        serial = g_block_move_serial;
        memcpy(&blocked, &g_block_move, sizeof(RECT));
        ReleaseMutex(g_mutex);

        vchannel_block();

        if (!GetWindowRect(hwnd, &rect))
        {
                debug("GetWindowRect failed!\n");
                goto end;
        }

        if ((hwnd == blocked_hwnd) && (rect.left == blocked.left) && (rect.top == blocked.top)
            && (rect.right == blocked.right) && (rect.bottom == blocked.bottom))
                goto end;

        vchannel_write("POSITION", "0x%p,%d,%d,%d,%d,0x%x",
                       hwnd,
                       rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, 0);

      end:
        vchannel_unblock();
}

static void
update_zorder(HWND hwnd)
{
        HWND behind;
        HWND block_hwnd, block_behind;
        unsigned int serial;

        WaitForSingleObject(g_mutex, INFINITE);
        serial = g_blocked_zchange_serial;
        block_hwnd = g_blocked_zchange[0];
        block_behind = g_blocked_zchange[1];
        ReleaseMutex(g_mutex);

        vchannel_block();

        behind = GetNextWindow(hwnd, GW_HWNDPREV);
        while (behind)
        {
                LONG style;

                style = GetWindowLong(behind, GWL_STYLE);

                if ((!(style & WS_CHILD) || (style & WS_POPUP)) && (style & WS_VISIBLE))
                        break;

                behind = GetNextWindow(behind, GW_HWNDPREV);
        }

        if ((hwnd == block_hwnd) && (behind == block_behind))
                vchannel_write("ACK", "%u", serial);
        else
                vchannel_write("ZCHANGE", "0x%p,0x%p,0x%x", hwnd, behind, 0);

        vchannel_unblock();
}

static LRESULT CALLBACK
wndproc_hook_proc(int code, WPARAM cur_thread, LPARAM details)
{
        HWND hwnd, parent;
        UINT msg;
        WPARAM wparam;
        LPARAM lparam;

        LONG style;

        if (code < 0)
                goto end;

        hwnd = ((CWPSTRUCT *) details)->hwnd;
        msg = ((CWPSTRUCT *) details)->message;
        wparam = ((CWPSTRUCT *) details)->wParam;
        lparam = ((CWPSTRUCT *) details)->lParam;

        style = GetWindowLong(hwnd, GWL_STYLE);

        /* Docs say that WS_CHILD and WS_POPUP is an illegal combination,
           but they exist nonetheless. */
        if ((style & WS_CHILD) && !(style & WS_POPUP))
                goto end;

        if (style & WS_POPUP)
        {
                parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT);
                if (!parent)
                        parent = (HWND) - 1;
        }
        else
                parent = NULL;

        switch (msg)
        {
                case WM_WINDOWPOSCHANGED:
                        {
                                WINDOWPOS *wp = (WINDOWPOS *) lparam;

                                if (wp->flags & SWP_SHOWWINDOW)
                                {
                                        unsigned short title[150];
                                        int state;

                                        vchannel_write("CREATE", "0x%p,0x%p,0x%x", hwnd, parent, 0);

                                        GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title));

                                        vchannel_write("TITLE", "0x%x,%s,0x%x", hwnd,
                                                       vchannel_strfilter_unicode(title), 0);

                                        if (style & WS_MAXIMIZE)
                                                state = 2;
                                        else if (style & WS_MINIMIZE)
                                                state = 1;
                                        else
                                                state = 0;

                                        update_position(hwnd);

                                        vchannel_write("STATE", "0x%p,0x%x,0x%x", hwnd, state, 0);
                                }

                                if (wp->flags & SWP_HIDEWINDOW)
                                        vchannel_write("DESTROY", "0x%p,0x%x", hwnd, 0);

                                if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE))
                                        break;

                                if (!(wp->flags & SWP_NOMOVE && wp->flags & SWP_NOSIZE))
                                        update_position(hwnd);

                                break;
                        }

                case WM_SIZE:
                        if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE))
                                break;
                        update_position(hwnd);
                        break;

                case WM_MOVE:
                        if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE))
                                break;
                        update_position(hwnd);
                        break;

                case WM_DESTROY:
                        if (!(style & WS_VISIBLE))
                                break;
                        vchannel_write("DESTROY", "0x%p,0x%x", hwnd, 0);
                        break;

                default:
                        break;
        }

      end:
        return CallNextHookEx(g_wndproc_hook, code, cur_thread, details);
}

static LRESULT CALLBACK
wndprocret_hook_proc(int code, WPARAM cur_thread, LPARAM details)
{
        HWND hwnd, parent;
        UINT msg;
        WPARAM wparam;
        LPARAM lparam;

        LONG style;

        if (code < 0)
                goto end;

        hwnd = ((CWPRETSTRUCT *) details)->hwnd;
        msg = ((CWPRETSTRUCT *) details)->message;
        wparam = ((CWPRETSTRUCT *) details)->wParam;
        lparam = ((CWPRETSTRUCT *) details)->lParam;

        style = GetWindowLong(hwnd, GWL_STYLE);

        /* Docs say that WS_CHILD and WS_POPUP is an illegal combination,
           but they exist nonetheless. */
        if ((style & WS_CHILD) && !(style & WS_POPUP))
                goto end;

        if (style & WS_POPUP)
        {
                parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT);
                if (!parent)
                        parent = (HWND) - 1;
        }
        else
                parent = NULL;

        switch (msg)
        {
                case WM_WINDOWPOSCHANGED:
                        {
                                WINDOWPOS *wp = (WINDOWPOS *) lparam;

                                if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE))
                                        break;

                                if (!(wp->flags & SWP_NOZORDER))
                                        update_zorder(hwnd);

                                break;
                        }


                case WM_SETTEXT:
                        {
                                unsigned short title[150];
                                if (!(style & WS_VISIBLE))
                                        break;
                                /* We cannot use the string in lparam because
                                   we need unicode. */
                                GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title));
                                vchannel_write("TITLE", "0x%p,%s,0x%x", hwnd,
                                               vchannel_strfilter_unicode(title), 0);
                                break;
                        }

                default:
                        break;
        }

        if (msg == g_wm_seamless_focus)
        {
                /* FIXME: SetActiveWindow() kills menus. Need to find a clean
                   way to solve this. */
                if ((GetActiveWindow() != hwnd) && !parent)
                        SetActiveWindow(hwnd);

                vchannel_write("ACK", "%u", g_blocked_focus_serial);
        }

      end:
        return CallNextHookEx(g_wndprocret_hook, code, cur_thread, details);
}

static LRESULT CALLBACK
cbt_hook_proc(int code, WPARAM wparam, LPARAM lparam)
{
        if (code < 0)
                goto end;

        switch (code)
        {
                case HCBT_MINMAX:
                        {
                                int show, state, blocked;
                                HWND blocked_hwnd;
                                unsigned int serial;

                                WaitForSingleObject(g_mutex, INFINITE);
                                blocked_hwnd = g_blocked_state_hwnd;
                                serial = g_blocked_state_serial;
                                blocked = g_blocked_state;
                                ReleaseMutex(g_mutex);

                                show = LOWORD(lparam);

                                if ((show == SW_NORMAL) || (show == SW_SHOWNORMAL)
                                    || (show == SW_RESTORE))
                                        state = 0;
                                else if ((show == SW_MINIMIZE) || (show == SW_SHOWMINIMIZED))
                                        state = 1;
                                else if ((show == SW_MAXIMIZE) || (show == SW_SHOWMAXIMIZED))
                                        state = 2;
                                else
                                {
                                        debug("Unexpected show: %d", show);
                                        break;
                                }

                                if ((blocked_hwnd == (HWND) wparam) && (blocked == state))
                                        vchannel_write("ACK", "%u", serial);
                                else
                                        vchannel_write("STATE", "0x%p,0x%x,0x%x", (HWND) wparam,
                                                       state, 0);

                                break;
                        }

                default:
                        break;
        }

      end:
        return CallNextHookEx(g_cbt_hook, code, wparam, lparam);
}

DLL_EXPORT void
SetHooks(void)
{
        if (!g_cbt_hook)
                g_cbt_hook = SetWindowsHookEx(WH_CBT, cbt_hook_proc, g_instance, 0);

        if (!g_wndproc_hook)
                g_wndproc_hook = SetWindowsHookEx(WH_CALLWNDPROC, wndproc_hook_proc, g_instance, 0);

        if (!g_wndprocret_hook)
                g_wndprocret_hook =
                        SetWindowsHookEx(WH_CALLWNDPROCRET, wndprocret_hook_proc, g_instance, 0);
}

DLL_EXPORT void
RemoveHooks(void)
{
        if (g_cbt_hook)
                UnhookWindowsHookEx(g_cbt_hook);

        if (g_wndproc_hook)
                UnhookWindowsHookEx(g_wndproc_hook);

        if (g_wndprocret_hook)
                UnhookWindowsHookEx(g_wndprocret_hook);
}

DLL_EXPORT void
SafeMoveWindow(unsigned int serial, HWND hwnd, int x, int y, int width, int height)
{
        RECT rect;

        WaitForSingleObject(g_mutex, INFINITE);
        g_block_move_hwnd = hwnd;
        g_block_move_serial = serial;
        g_block_move.left = x;
        g_block_move.top = y;
        g_block_move.right = x + width;
        g_block_move.bottom = y + height;
        ReleaseMutex(g_mutex);

        SetWindowPos(hwnd, NULL, x, y, width, height, SWP_NOACTIVATE | SWP_NOZORDER);

        vchannel_write("ACK", "%u", serial);

        if (!GetWindowRect(hwnd, &rect))
                debug("GetWindowRect failed!\n");
        else if ((rect.left != x) || (rect.top != y) || (rect.right != x + width)
                 || (rect.bottom != y + height))
                update_position(hwnd);

        WaitForSingleObject(g_mutex, INFINITE);
        g_block_move_hwnd = NULL;
        memset(&g_block_move, 0, sizeof(RECT));
        ReleaseMutex(g_mutex);
}

DLL_EXPORT void
SafeZChange(unsigned int serial, HWND hwnd, HWND behind)
{
        WaitForSingleObject(g_mutex, INFINITE);
        g_blocked_zchange_serial = serial;
        g_blocked_zchange[0] = hwnd;
        g_blocked_zchange[1] = behind;
        ReleaseMutex(g_mutex);

        if (behind == NULL)
                behind = HWND_TOP;

        SetWindowPos(hwnd, behind, 0, 0, 0, 0, SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);

        WaitForSingleObject(g_mutex, INFINITE);
        g_blocked_zchange[0] = NULL;
        g_blocked_zchange[1] = NULL;
        ReleaseMutex(g_mutex);
}

DLL_EXPORT void
SafeFocus(unsigned int serial, HWND hwnd)
{
        WaitForSingleObject(g_mutex, INFINITE);
        g_blocked_focus_serial = serial;
        g_blocked_focus = hwnd;
        ReleaseMutex(g_mutex);

        SendMessage(hwnd, g_wm_seamless_focus, 0, 0);

        WaitForSingleObject(g_mutex, INFINITE);
        g_blocked_focus = NULL;
        ReleaseMutex(g_mutex);
}

DLL_EXPORT void
SafeSetState(unsigned int serial, HWND hwnd, int state)
{
        LONG style;
        int curstate;

        vchannel_block();

        style = GetWindowLong(hwnd, GWL_STYLE);

        if (style & WS_MAXIMIZE)
                curstate = 2;
        else if (style & WS_MINIMIZE)
                curstate = 1;
        else
                curstate = 0;

        if (state == curstate)
        {
                vchannel_write("ACK", "%u", serial);
                vchannel_unblock();
                return;
        }

        WaitForSingleObject(g_mutex, INFINITE);
        g_blocked_state_hwnd = hwnd;
        g_blocked_state_serial = serial;
        g_blocked_state = state;
        ReleaseMutex(g_mutex);

        vchannel_unblock();

        if (state == 0)
                ShowWindow(hwnd, SW_RESTORE);
        else if (state == 1)
                ShowWindow(hwnd, SW_MINIMIZE);
        else if (state == 2)
                ShowWindow(hwnd, SW_MAXIMIZE);
        else
                debug("Invalid state %d sent.", state);

        WaitForSingleObject(g_mutex, INFINITE);
        g_blocked_state_hwnd = NULL;
        g_blocked_state = -1;
        ReleaseMutex(g_mutex);
}

DLL_EXPORT int
GetInstanceCount()
{
        return g_instance_count;
}

BOOL APIENTRY
DllMain(HINSTANCE hinstDLL, DWORD ul_reason_for_call, LPVOID lpReserved)
{
        switch (ul_reason_for_call)
        {
                case DLL_PROCESS_ATTACH:
                        // remember our instance handle
                        g_instance = hinstDLL;

                        g_mutex = CreateMutex(NULL, FALSE, "Local\\SeamlessDLL");
                        if (!g_mutex)
                                return FALSE;

                        WaitForSingleObject(g_mutex, INFINITE);
                        ++g_instance_count;
                        ReleaseMutex(g_mutex);

                        g_wm_seamless_focus = RegisterWindowMessage(FOCUS_MSG_NAME);

                        vchannel_open();

                        break;

                case DLL_THREAD_ATTACH:
                        break;

                case DLL_THREAD_DETACH:
                        break;

                case DLL_PROCESS_DETACH:
                        WaitForSingleObject(g_mutex, INFINITE);
                        --g_instance_count;
                        ReleaseMutex(g_mutex);

                        vchannel_close();

                        CloseHandle(g_mutex);

                        break;
        }

        return TRUE;
}
1	ossman_	1071	/* -- c-basic-offset: 8 --
2			rdesktop: A Remote Desktop Protocol client.
3			Seamless windows - Remote server hook DLL
4	ossman_	1069
5	ossman_	1071	Based on code copyright (C) 2004-2005 Martin Wickett
6
7			Copyright (C) Peter Åstrand <astrand@cendio.se> 2005-2006
8			Copyright (C) Pierre Ossman <ossman@cendio.se> 2006
9
10			This program is free software; you can redistribute it and/or modify
11			it under the terms of the GNU General Public License as published by
12			the Free Software Foundation; either version 2 of the License, or
13			(at your option) any later version.
14
15			This program is distributed in the hope that it will be useful,
16			but WITHOUT ANY WARRANTY; without even the implied warranty of
17			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18			GNU General Public License for more details.
19
20			You should have received a copy of the GNU General Public License
21			along with this program; if not, write to the Free Software
22			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23			*/
24
25	ossman_	1069	#include <stdio.h>
26			#include <stdarg.h>
27
28	ossman_	1071	#include <windows.h>
29			#include <winuser.h>
30	ossman_	1069
31	ossman_	1073	#include "../vchannel.h"
32	ossman_	1071
33	ossman_	1069	#define DLL_EXPORT __declspec(dllexport)
34
35	ossman_	1145	#ifdef __GNUC__
36			#define SHARED __attribute__((section ("SHAREDDATA"), shared))
37			#else
38			#define SHARED
39			#endif
40
41	ossman_	1069	// Shared DATA
42			#pragma data_seg ( "SHAREDDATA" )
43
44			// this is the total number of processes this dll is currently attached to
45	ossman_	1145	int g_instance_count SHARED = 0;
46	ossman_	1069
47	ossman_	1145	// blocks for locally generated events
48	ossman_	1161	HWND g_block_move_hwnd SHARED = NULL;
49	ossman_	1165	unsigned int g_block_move_serial SHARED = 0;
50	ossman_	1145	RECT g_block_move SHARED = { 0, 0, 0, 0 };
51	ossman_	1165
52			unsigned int g_blocked_zchange_serial SHARED = 0;
53	ossman_	1158	HWND g_blocked_zchange[2] SHARED = { NULL, NULL };
54	ossman_	1165
55			unsigned int g_blocked_focus_serial SHARED = 0;
56	ossman_	1158	HWND g_blocked_focus SHARED = NULL;
57	ossman_	1165
58			unsigned int g_blocked_state_serial SHARED = 0;
59	ossman_	1161	HWND g_blocked_state_hwnd SHARED = NULL;
60	ossman_	1160	int g_blocked_state SHARED = -1;
61	ossman_	1145
62	ossman_	1069	#pragma data_seg ()
63
64			#pragma comment(linker, "/section:SHAREDDATA,rws")
65
66	ossman_	1153	#define FOCUS_MSG_NAME "WM_SEAMLESS_FOCUS"
67			static UINT g_wm_seamless_focus;
68
69	ossman_	1071	static HHOOK g_cbt_hook = NULL;
70			static HHOOK g_wndproc_hook = NULL;
71	ossman_	1134	static HHOOK g_wndprocret_hook = NULL;
72	ossman_	1069
73	ossman_	1071	static HINSTANCE g_instance = NULL;
74	ossman_	1069
75	ossman_	1071	static HANDLE g_mutex = NULL;
76	ossman_	1069
77	ossman_	1081	static void
78			update_position(HWND hwnd)
79			{
80	ossman_	1145	RECT rect, blocked;
81	ossman_	1161	HWND blocked_hwnd;
82	ossman_	1165	unsigned int serial;
83	ossman_	1081
84	ossman_	1145	WaitForSingleObject(g_mutex, INFINITE);
85	ossman_	1165	blocked_hwnd = g_block_move_hwnd;
86			serial = g_block_move_serial;
87	ossman_	1145	memcpy(&blocked, &g_block_move, sizeof(RECT));
88			ReleaseMutex(g_mutex);
89
90	ossman_	1167	vchannel_block();
91
92			if (!GetWindowRect(hwnd, &rect))
93			{
94			debug("GetWindowRect failed!\n");
95			goto end;
96			}
97
98	ossman_	1161	if ((hwnd == blocked_hwnd) && (rect.left == blocked.left) && (rect.top == blocked.top)
99	ossman_	1145	&& (rect.right == blocked.right) && (rect.bottom == blocked.bottom))
100	ossman_	1167	goto end;
101
102			vchannel_write("POSITION", "0x%p,%d,%d,%d,%d,0x%x",
103			hwnd,
104			rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, 0);
105
106			end:
107			vchannel_unblock();
108	ossman_	1081	}
109
110	ossman_	1162	static void
111			update_zorder(HWND hwnd)
112			{
113			HWND behind;
114			HWND block_hwnd, block_behind;
115	ossman_	1165	unsigned int serial;
116	ossman_	1162
117			WaitForSingleObject(g_mutex, INFINITE);
118	ossman_	1165	serial = g_blocked_zchange_serial;
119	ossman_	1162	block_hwnd = g_blocked_zchange[0];
120			block_behind = g_blocked_zchange[1];
121			ReleaseMutex(g_mutex);
122
123	ossman_	1167	vchannel_block();
124
125	ossman_	1162	behind = GetNextWindow(hwnd, GW_HWNDPREV);
126			while (behind)
127			{
128			LONG style;
129
130			style = GetWindowLong(behind, GWL_STYLE);
131
132			if ((!(style & WS_CHILD) \|\| (style & WS_POPUP)) && (style & WS_VISIBLE))
133			break;
134
135			behind = GetNextWindow(behind, GW_HWNDPREV);
136			}
137
138			if ((hwnd == block_hwnd) && (behind == block_behind))
139	ossman_	1165	vchannel_write("ACK", "%u", serial);
140			else
141			vchannel_write("ZCHANGE", "0x%p,0x%p,0x%x", hwnd, behind, 0);
142	ossman_	1167
143			vchannel_unblock();
144	ossman_	1162	}
145
146	ossman_	1071	static LRESULT CALLBACK
147			wndproc_hook_proc(int code, WPARAM cur_thread, LPARAM details)
148	ossman_	1069	{
149	ossman_	1097	HWND hwnd, parent;
150	ossman_	1079	UINT msg;
151			WPARAM wparam;
152			LPARAM lparam;
153	ossman_	1069
154	ossman_	1079	LONG style;
155	ossman_	1069
156	ossman_	1071	if (code < 0)
157			goto end;
158	ossman_	1069
159	ossman_	1079	hwnd = ((CWPSTRUCT *) details)->hwnd;
160			msg = ((CWPSTRUCT *) details)->message;
161			wparam = ((CWPSTRUCT *) details)->wParam;
162			lparam = ((CWPSTRUCT *) details)->lParam;
163
164			style = GetWindowLong(hwnd, GWL_STYLE);
165
166	ossman_	1082	/* Docs say that WS_CHILD and WS_POPUP is an illegal combination,
167			but they exist nonetheless. */
168			if ((style & WS_CHILD) && !(style & WS_POPUP))
169	ossman_	1079	goto end;
170
171	ossman_	1097	if (style & WS_POPUP)
172	ossman_	1109	{
173	ossman_	1097	parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT);
174	ossman_	1109	if (!parent)
175			parent = (HWND) - 1;
176			}
177	ossman_	1097	else
178			parent = NULL;
179
180	ossman_	1071	switch (msg)
181			{
182			case WM_WINDOWPOSCHANGED:
183	ossman_	1079	{
184			WINDOWPOS wp = (WINDOWPOS ) lparam;
185	ossman_	1069
186	ossman_	1079	if (wp->flags & SWP_SHOWWINDOW)
187			{
188	ossman_	1134	unsigned short title[150];
189	ossman_	1099	int state;
190
191	ossman_	1163	vchannel_write("CREATE", "0x%p,0x%p,0x%x", hwnd, parent, 0);
192	ossman_	1069
193	ossman_	1134	GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title));
194	ossman_	1069
195	ossman_	1163	vchannel_write("TITLE", "0x%x,%s,0x%x", hwnd,
196	ossman_	1134	vchannel_strfilter_unicode(title), 0);
197	ossman_	1099
198			if (style & WS_MAXIMIZE)
199			state = 2;
200			else if (style & WS_MINIMIZE)
201			state = 1;
202			else
203			state = 0;
204
205	ossman_	1081	update_position(hwnd);
206	ossman_	1099
207	ossman_	1163	vchannel_write("STATE", "0x%p,0x%x,0x%x", hwnd, state, 0);
208	ossman_	1079	}
209	ossman_	1069
210	ossman_	1079	if (wp->flags & SWP_HIDEWINDOW)
211	ossman_	1163	vchannel_write("DESTROY", "0x%p,0x%x", hwnd, 0);
212	ossman_	1079
213	ossman_	1108	if (!(style & WS_VISIBLE) \|\| (style & WS_MINIMIZE))
214	ossman_	1079	break;
215
216	ossman_	1080	if (!(wp->flags & SWP_NOMOVE && wp->flags & SWP_NOSIZE))
217	ossman_	1081	update_position(hwnd);
218	ossman_	1079
219	ossman_	1071	break;
220	ossman_	1079	}
221	ossman_	1069
222	ossman_	1081	case WM_SIZE:
223	ossman_	1108	if (!(style & WS_VISIBLE) \|\| (style & WS_MINIMIZE))
224	ossman_	1083	break;
225	ossman_	1081	update_position(hwnd);
226			break;
227
228			case WM_MOVE:
229	ossman_	1108	if (!(style & WS_VISIBLE) \|\| (style & WS_MINIMIZE))
230	ossman_	1083	break;
231	ossman_	1081	update_position(hwnd);
232			break;
233
234	ossman_	1134	case WM_DESTROY:
235			if (!(style & WS_VISIBLE))
236			break;
237	ossman_	1163	vchannel_write("DESTROY", "0x%p,0x%x", hwnd, 0);
238	ossman_	1134	break;
239
240			default:
241			break;
242			}
243
244			end:
245			return CallNextHookEx(g_wndproc_hook, code, cur_thread, details);
246			}
247
248			static LRESULT CALLBACK
249			wndprocret_hook_proc(int code, WPARAM cur_thread, LPARAM details)
250			{
251			HWND hwnd, parent;
252			UINT msg;
253			WPARAM wparam;
254			LPARAM lparam;
255
256			LONG style;
257
258			if (code < 0)
259			goto end;
260
261			hwnd = ((CWPRETSTRUCT *) details)->hwnd;
262			msg = ((CWPRETSTRUCT *) details)->message;
263			wparam = ((CWPRETSTRUCT *) details)->wParam;
264			lparam = ((CWPRETSTRUCT *) details)->lParam;
265
266			style = GetWindowLong(hwnd, GWL_STYLE);
267
268			/* Docs say that WS_CHILD and WS_POPUP is an illegal combination,
269			but they exist nonetheless. */
270			if ((style & WS_CHILD) && !(style & WS_POPUP))
271			goto end;
272
273	ossman_	1158	if (style & WS_POPUP)
274			{
275			parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT);
276			if (!parent)
277			parent = (HWND) - 1;
278			}
279			else
280			parent = NULL;
281
282	ossman_	1134	switch (msg)
283			{
284	ossman_	1162	case WM_WINDOWPOSCHANGED:
285			{
286			WINDOWPOS wp = (WINDOWPOS ) lparam;
287
288			if (!(style & WS_VISIBLE) \|\| (style & WS_MINIMIZE))
289			break;
290
291			if (!(wp->flags & SWP_NOZORDER))
292			update_zorder(hwnd);
293
294			break;
295			}
296
297
298	ossman_	1102	case WM_SETTEXT:
299	ossman_	1113	{
300	ossman_	1134	unsigned short title[150];
301	ossman_	1113	if (!(style & WS_VISIBLE))
302			break;
303	ossman_	1134	/* We cannot use the string in lparam because
304			we need unicode. */
305			GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title));
306	ossman_	1163	vchannel_write("TITLE", "0x%p,%s,0x%x", hwnd,
307	ossman_	1134	vchannel_strfilter_unicode(title), 0);
308	ossman_	1102	break;
309	ossman_	1113	}
310	ossman_	1102
311	ossman_	1071	default:
312			break;
313			}
314
315	ossman_	1153	if (msg == g_wm_seamless_focus)
316	ossman_	1158	{
317			/* FIXME: SetActiveWindow() kills menus. Need to find a clean
318			way to solve this. */
319			if ((GetActiveWindow() != hwnd) && !parent)
320			SetActiveWindow(hwnd);
321	ossman_	1165
322			vchannel_write("ACK", "%u", g_blocked_focus_serial);
323	ossman_	1158	}
324	ossman_	1153
325	ossman_	1071	end:
326	ossman_	1134	return CallNextHookEx(g_wndprocret_hook, code, cur_thread, details);
327	ossman_	1069	}
328
329	ossman_	1071	static LRESULT CALLBACK
330			cbt_hook_proc(int code, WPARAM wparam, LPARAM lparam)
331	ossman_	1069	{
332	ossman_	1071	if (code < 0)
333			goto end;
334	ossman_	1069
335	ossman_	1071	switch (code)
336			{
337			case HCBT_MINMAX:
338			{
339	ossman_	1160	int show, state, blocked;
340	ossman_	1161	HWND blocked_hwnd;
341	ossman_	1165	unsigned int serial;
342	ossman_	1069
343	ossman_	1160	WaitForSingleObject(g_mutex, INFINITE);
344	ossman_	1161	blocked_hwnd = g_blocked_state_hwnd;
345	ossman_	1165	serial = g_blocked_state_serial;
346	ossman_	1160	blocked = g_blocked_state;
347			ReleaseMutex(g_mutex);
348
349	ossman_	1071	show = LOWORD(lparam);
350	ossman_	1069
351	ossman_	1128	if ((show == SW_NORMAL) \|\| (show == SW_SHOWNORMAL)
352			\|\| (show == SW_RESTORE))
353	ossman_	1079	state = 0;
354	ossman_	1106	else if ((show == SW_MINIMIZE) \|\| (show == SW_SHOWMINIMIZED))
355	ossman_	1079	state = 1;
356	ossman_	1106	else if ((show == SW_MAXIMIZE) \|\| (show == SW_SHOWMAXIMIZED))
357	ossman_	1079	state = 2;
358	ossman_	1100	else
359	ossman_	1106	{
360			debug("Unexpected show: %d", show);
361	ossman_	1100	break;
362	ossman_	1106	}
363	ossman_	1160
364	ossman_	1165	if ((blocked_hwnd == (HWND) wparam) && (blocked == state))
365			vchannel_write("ACK", "%u", serial);
366			else
367	ossman_	1163	vchannel_write("STATE", "0x%p,0x%x,0x%x", (HWND) wparam,
368			state, 0);
369	ossman_	1160
370	ossman_	1071	break;
371			}
372	ossman_	1069
373	ossman_	1071	default:
374			break;
375			}
376	ossman_	1069
377	ossman_	1071	end:
378			return CallNextHookEx(g_cbt_hook, code, wparam, lparam);
379	ossman_	1069	}
380
381	ossman_	1071	DLL_EXPORT void
382			SetHooks(void)
383	ossman_	1069	{
384	ossman_	1071	if (!g_cbt_hook)
385			g_cbt_hook = SetWindowsHookEx(WH_CBT, cbt_hook_proc, g_instance, 0);
386	ossman_	1069
387	ossman_	1071	if (!g_wndproc_hook)
388			g_wndproc_hook = SetWindowsHookEx(WH_CALLWNDPROC, wndproc_hook_proc, g_instance, 0);
389	ossman_	1134
390			if (!g_wndprocret_hook)
391			g_wndprocret_hook =
392			SetWindowsHookEx(WH_CALLWNDPROCRET, wndprocret_hook_proc, g_instance, 0);
393	ossman_	1069	}
394
395	ossman_	1071	DLL_EXPORT void
396			RemoveHooks(void)
397	ossman_	1069	{
398	ossman_	1071	if (g_cbt_hook)
399			UnhookWindowsHookEx(g_cbt_hook);
400	ossman_	1069
401	ossman_	1071	if (g_wndproc_hook)
402			UnhookWindowsHookEx(g_wndproc_hook);
403	ossman_	1134
404			if (g_wndprocret_hook)
405			UnhookWindowsHookEx(g_wndprocret_hook);
406	ossman_	1069	}
407
408	ossman_	1145	DLL_EXPORT void
409	ossman_	1165	SafeMoveWindow(unsigned int serial, HWND hwnd, int x, int y, int width, int height)
410	ossman_	1145	{
411	ossman_	1165	RECT rect;
412
413	ossman_	1145	WaitForSingleObject(g_mutex, INFINITE);
414	ossman_	1161	g_block_move_hwnd = hwnd;
415	ossman_	1165	g_block_move_serial = serial;
416	ossman_	1145	g_block_move.left = x;
417			g_block_move.top = y;
418			g_block_move.right = x + width;
419			g_block_move.bottom = y + height;
420			ReleaseMutex(g_mutex);
421
422			SetWindowPos(hwnd, NULL, x, y, width, height, SWP_NOACTIVATE \| SWP_NOZORDER);
423
424	ossman_	1167	vchannel_write("ACK", "%u", serial);
425
426			if (!GetWindowRect(hwnd, &rect))
427			debug("GetWindowRect failed!\n");
428			else if ((rect.left != x) \|\| (rect.top != y) \|\| (rect.right != x + width)
429			\|\| (rect.bottom != y + height))
430			update_position(hwnd);
431
432	ossman_	1145	WaitForSingleObject(g_mutex, INFINITE);
433	ossman_	1161	g_block_move_hwnd = NULL;
434	ossman_	1145	memset(&g_block_move, 0, sizeof(RECT));
435			ReleaseMutex(g_mutex);
436			}
437
438	ossman_	1158	DLL_EXPORT void
439	ossman_	1165	SafeZChange(unsigned int serial, HWND hwnd, HWND behind)
440	ossman_	1158	{
441			WaitForSingleObject(g_mutex, INFINITE);
442	ossman_	1165	g_blocked_zchange_serial = serial;
443	ossman_	1158	g_blocked_zchange[0] = hwnd;
444			g_blocked_zchange[1] = behind;
445			ReleaseMutex(g_mutex);
446
447	ossman_	1162	if (behind == NULL)
448			behind = HWND_TOP;
449
450	ossman_	1158	SetWindowPos(hwnd, behind, 0, 0, 0, 0, SWP_NOACTIVATE \| SWP_NOMOVE \| SWP_NOSIZE);
451
452			WaitForSingleObject(g_mutex, INFINITE);
453			g_blocked_zchange[0] = NULL;
454			g_blocked_zchange[1] = NULL;
455			ReleaseMutex(g_mutex);
456			}
457
458			DLL_EXPORT void
459	ossman_	1165	SafeFocus(unsigned int serial, HWND hwnd)
460	ossman_	1158	{
461			WaitForSingleObject(g_mutex, INFINITE);
462	ossman_	1165	g_blocked_focus_serial = serial;
463	ossman_	1158	g_blocked_focus = hwnd;
464			ReleaseMutex(g_mutex);
465
466			SendMessage(hwnd, g_wm_seamless_focus, 0, 0);
467
468			WaitForSingleObject(g_mutex, INFINITE);
469			g_blocked_focus = NULL;
470			ReleaseMutex(g_mutex);
471			}
472
473	ossman_	1160	DLL_EXPORT void
474	ossman_	1165	SafeSetState(unsigned int serial, HWND hwnd, int state)
475	ossman_	1160	{
476	ossman_	1165	LONG style;
477			int curstate;
478
479			vchannel_block();
480
481			style = GetWindowLong(hwnd, GWL_STYLE);
482
483			if (style & WS_MAXIMIZE)
484			curstate = 2;
485			else if (style & WS_MINIMIZE)
486			curstate = 1;
487			else
488			curstate = 0;
489
490			if (state == curstate)
491			{
492			vchannel_write("ACK", "%u", serial);
493			vchannel_unblock();
494	ossman_	1167	return;
495	ossman_	1165	}
496
497	ossman_	1160	WaitForSingleObject(g_mutex, INFINITE);
498	ossman_	1161	g_blocked_state_hwnd = hwnd;
499	ossman_	1165	g_blocked_state_serial = serial;
500	ossman_	1160	g_blocked_state = state;
501			ReleaseMutex(g_mutex);
502
503	ossman_	1165	vchannel_unblock();
504
505	ossman_	1160	if (state == 0)
506			ShowWindow(hwnd, SW_RESTORE);
507			else if (state == 1)
508			ShowWindow(hwnd, SW_MINIMIZE);
509			else if (state == 2)
510			ShowWindow(hwnd, SW_MAXIMIZE);
511			else
512			debug("Invalid state %d sent.", state);
513
514			WaitForSingleObject(g_mutex, INFINITE);
515	ossman_	1161	g_blocked_state_hwnd = NULL;
516	ossman_	1160	g_blocked_state = -1;
517			ReleaseMutex(g_mutex);
518			}
519
520	ossman_	1071	DLL_EXPORT int
521			GetInstanceCount()
522	ossman_	1069	{
523	ossman_	1071	return g_instance_count;
524	ossman_	1069	}
525
526	ossman_	1071	BOOL APIENTRY
527			DllMain(HINSTANCE hinstDLL, DWORD ul_reason_for_call, LPVOID lpReserved)
528	ossman_	1069	{
529	ossman_	1071	switch (ul_reason_for_call)
530			{
531			case DLL_PROCESS_ATTACH:
532			// remember our instance handle
533			g_instance = hinstDLL;
534	ossman_	1069
535	ossman_	1073	g_mutex = CreateMutex(NULL, FALSE, "Local\\SeamlessDLL");
536	ossman_	1071	if (!g_mutex)
537			return FALSE;
538	ossman_	1069
539	ossman_	1071	WaitForSingleObject(g_mutex, INFINITE);
540			++g_instance_count;
541			ReleaseMutex(g_mutex);
542	ossman_	1069
543	ossman_	1153	g_wm_seamless_focus = RegisterWindowMessage(FOCUS_MSG_NAME);
544
545	ossman_	1071	vchannel_open();
546	ossman_	1069
547	ossman_	1071	break;
548	ossman_	1069
549	ossman_	1071	case DLL_THREAD_ATTACH:
550			break;
551	ossman_	1069
552	ossman_	1071	case DLL_THREAD_DETACH:
553			break;
554	ossman_	1069
555	ossman_	1071	case DLL_PROCESS_DETACH:
556			WaitForSingleObject(g_mutex, INFINITE);
557			--g_instance_count;
558			ReleaseMutex(g_mutex);
559	ossman_	1069
560	ossman_	1071	vchannel_close();
561	ossman_	1069
562	ossman_	1071	CloseHandle(g_mutex);
563	ossman_	1069
564	ossman_	1071	break;
565			}
566	ossman_	1069
567	ossman_	1071	return TRUE;
568	ossman_	1069	}