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 HWND
get_parent(HWND hwnd)
{
        LONG style;
        HWND parent;

        style = GetWindowLong(hwnd, GWL_STYLE);

        if (style & (WS_POPUP | DS_MODALFRAME))
        {
                parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT);

                if (parent)
                {
                        style = GetWindowLong(parent, GWL_STYLE);
                        if (((style & WS_CHILD) && !(style & WS_POPUP)) || !(style & WS_VISIBLE))
                                parent = NULL;
                }

                if (!parent)
                        parent = GetWindow(hwnd, GW_OWNER);

                if (parent)
                {
                        style = GetWindowLong(parent, GWL_STYLE);
                        if (((style & WS_CHILD) && !(style & WS_POPUP)) || !(style & WS_VISIBLE))
                                parent = NULL;
                }

                if (!parent)
                        parent = (HWND) - 1;
        }
        else
                parent = NULL;

        return parent;
}

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;

        parent = get_parent(hwnd);

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

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

                                        GetWindowThreadProcessId(hwnd, &pid);

                                        flags = 0;
                                        if (style & DS_MODALFRAME)
                                                flags |= SEAMLESS_CREATE_MODAL;

                                        vchannel_write("CREATE", "0x%08lx,0x%08lx,0x%08lx,0x%08x",
                                                       (long) hwnd, (long) pid, (long) parent,
                                                       flags);

                                        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;

        parent = get_parent(hwnd);

        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: SetForegroundWindow() kills menus. Need to find a
                   clean way to solve this. */
                if ((GetForegroundWindow() != hwnd) && !parent)
                        SetForegroundWindow(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_	1179	static HWND
147			get_parent(HWND hwnd)
148			{
149			LONG style;
150			HWND parent;
151
152			style = GetWindowLong(hwnd, GWL_STYLE);
153
154			if (style & (WS_POPUP \| DS_MODALFRAME))
155			{
156			parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT);
157
158			if (parent)
159			{
160			style = GetWindowLong(parent, GWL_STYLE);
161			if (((style & WS_CHILD) && !(style & WS_POPUP)) \|\| !(style & WS_VISIBLE))
162			parent = NULL;
163			}
164
165			if (!parent)
166			parent = GetWindow(hwnd, GW_OWNER);
167
168			if (parent)
169			{
170			style = GetWindowLong(parent, GWL_STYLE);
171			if (((style & WS_CHILD) && !(style & WS_POPUP)) \|\| !(style & WS_VISIBLE))
172			parent = NULL;
173			}
174
175			if (!parent)
176			parent = (HWND) - 1;
177			}
178			else
179			parent = NULL;
180
181			return parent;
182			}
183
184	ossman_	1071	static LRESULT CALLBACK
185			wndproc_hook_proc(int code, WPARAM cur_thread, LPARAM details)
186	ossman_	1069	{
187	ossman_	1097	HWND hwnd, parent;
188	ossman_	1079	UINT msg;
189			WPARAM wparam;
190			LPARAM lparam;
191	ossman_	1069
192	ossman_	1079	LONG style;
193	ossman_	1069
194	ossman_	1071	if (code < 0)
195			goto end;
196	ossman_	1069
197	ossman_	1079	hwnd = ((CWPSTRUCT *) details)->hwnd;
198			msg = ((CWPSTRUCT *) details)->message;
199			wparam = ((CWPSTRUCT *) details)->wParam;
200			lparam = ((CWPSTRUCT *) details)->lParam;
201
202			style = GetWindowLong(hwnd, GWL_STYLE);
203
204	ossman_	1082	/* Docs say that WS_CHILD and WS_POPUP is an illegal combination,
205			but they exist nonetheless. */
206			if ((style & WS_CHILD) && !(style & WS_POPUP))
207	ossman_	1079	goto end;
208
209	ossman_	1179	parent = get_parent(hwnd);
210	ossman_	1097
211	ossman_	1071	switch (msg)
212			{
213			case WM_WINDOWPOSCHANGED:
214	ossman_	1079	{
215			WINDOWPOS wp = (WINDOWPOS ) lparam;
216	ossman_	1069
217	ossman_	1079	if (wp->flags & SWP_SHOWWINDOW)
218			{
219	ossman_	1134	unsigned short title[150];
220	ossman_	1099	int state;
221	ossman_	1177	DWORD pid;
222			int flags;
223	ossman_	1099
224	ossman_	1177	GetWindowThreadProcessId(hwnd, &pid);
225	ossman_	1069
226	ossman_	1177	flags = 0;
227			if (style & DS_MODALFRAME)
228			flags \|= SEAMLESS_CREATE_MODAL;
229
230			vchannel_write("CREATE", "0x%08lx,0x%08lx,0x%08lx,0x%08x",
231			(long) hwnd, (long) pid, (long) parent,
232			flags);
233
234	ossman_	1134	GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title));
235	ossman_	1069
236	ossman_	1163	vchannel_write("TITLE", "0x%x,%s,0x%x", hwnd,
237	ossman_	1134	vchannel_strfilter_unicode(title), 0);
238	ossman_	1099
239			if (style & WS_MAXIMIZE)
240			state = 2;
241			else if (style & WS_MINIMIZE)
242			state = 1;
243			else
244			state = 0;
245
246	ossman_	1081	update_position(hwnd);
247	ossman_	1099
248	ossman_	1163	vchannel_write("STATE", "0x%p,0x%x,0x%x", hwnd, state, 0);
249	ossman_	1079	}
250	ossman_	1069
251	ossman_	1079	if (wp->flags & SWP_HIDEWINDOW)
252	ossman_	1163	vchannel_write("DESTROY", "0x%p,0x%x", hwnd, 0);
253	ossman_	1079
254	ossman_	1108	if (!(style & WS_VISIBLE) \|\| (style & WS_MINIMIZE))
255	ossman_	1079	break;
256
257	ossman_	1080	if (!(wp->flags & SWP_NOMOVE && wp->flags & SWP_NOSIZE))
258	ossman_	1081	update_position(hwnd);
259	ossman_	1079
260	ossman_	1071	break;
261	ossman_	1079	}
262	ossman_	1069
263	ossman_	1081	case WM_SIZE:
264	ossman_	1108	if (!(style & WS_VISIBLE) \|\| (style & WS_MINIMIZE))
265	ossman_	1083	break;
266	ossman_	1081	update_position(hwnd);
267			break;
268
269			case WM_MOVE:
270	ossman_	1108	if (!(style & WS_VISIBLE) \|\| (style & WS_MINIMIZE))
271	ossman_	1083	break;
272	ossman_	1081	update_position(hwnd);
273			break;
274
275	ossman_	1134	case WM_DESTROY:
276			if (!(style & WS_VISIBLE))
277			break;
278	ossman_	1163	vchannel_write("DESTROY", "0x%p,0x%x", hwnd, 0);
279	ossman_	1134	break;
280
281			default:
282			break;
283			}
284
285			end:
286			return CallNextHookEx(g_wndproc_hook, code, cur_thread, details);
287			}
288
289			static LRESULT CALLBACK
290			wndprocret_hook_proc(int code, WPARAM cur_thread, LPARAM details)
291			{
292			HWND hwnd, parent;
293			UINT msg;
294			WPARAM wparam;
295			LPARAM lparam;
296
297			LONG style;
298
299			if (code < 0)
300			goto end;
301
302			hwnd = ((CWPRETSTRUCT *) details)->hwnd;
303			msg = ((CWPRETSTRUCT *) details)->message;
304			wparam = ((CWPRETSTRUCT *) details)->wParam;
305			lparam = ((CWPRETSTRUCT *) details)->lParam;
306
307			style = GetWindowLong(hwnd, GWL_STYLE);
308
309			/* Docs say that WS_CHILD and WS_POPUP is an illegal combination,
310			but they exist nonetheless. */
311			if ((style & WS_CHILD) && !(style & WS_POPUP))
312			goto end;
313
314	ossman_	1179	parent = get_parent(hwnd);
315	ossman_	1158
316	ossman_	1134	switch (msg)
317			{
318	ossman_	1162	case WM_WINDOWPOSCHANGED:
319			{
320			WINDOWPOS wp = (WINDOWPOS ) lparam;
321
322			if (!(style & WS_VISIBLE) \|\| (style & WS_MINIMIZE))
323			break;
324
325			if (!(wp->flags & SWP_NOZORDER))
326			update_zorder(hwnd);
327
328			break;
329			}
330
331
332	ossman_	1102	case WM_SETTEXT:
333	ossman_	1113	{
334	ossman_	1134	unsigned short title[150];
335	ossman_	1113	if (!(style & WS_VISIBLE))
336			break;
337	ossman_	1134	/* We cannot use the string in lparam because
338			we need unicode. */
339			GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title));
340	ossman_	1163	vchannel_write("TITLE", "0x%p,%s,0x%x", hwnd,
341	ossman_	1134	vchannel_strfilter_unicode(title), 0);
342	ossman_	1102	break;
343	ossman_	1113	}
344	ossman_	1102
345	ossman_	1071	default:
346			break;
347			}
348
349	ossman_	1153	if (msg == g_wm_seamless_focus)
350	ossman_	1158	{
351	ossman_	1185	/* FIXME: SetForegroundWindow() kills menus. Need to find a
352			clean way to solve this. */
353			if ((GetForegroundWindow() != hwnd) && !parent)
354			SetForegroundWindow(hwnd);
355	ossman_	1165
356			vchannel_write("ACK", "%u", g_blocked_focus_serial);
357	ossman_	1158	}
358	ossman_	1153
359	ossman_	1071	end:
360	ossman_	1134	return CallNextHookEx(g_wndprocret_hook, code, cur_thread, details);
361	ossman_	1069	}
362
363	ossman_	1071	static LRESULT CALLBACK
364			cbt_hook_proc(int code, WPARAM wparam, LPARAM lparam)
365	ossman_	1069	{
366	ossman_	1071	if (code < 0)
367			goto end;
368	ossman_	1069
369	ossman_	1071	switch (code)
370			{
371			case HCBT_MINMAX:
372			{
373	ossman_	1160	int show, state, blocked;
374	ossman_	1161	HWND blocked_hwnd;
375	ossman_	1165	unsigned int serial;
376	ossman_	1069
377	ossman_	1160	WaitForSingleObject(g_mutex, INFINITE);
378	ossman_	1161	blocked_hwnd = g_blocked_state_hwnd;
379	ossman_	1165	serial = g_blocked_state_serial;
380	ossman_	1160	blocked = g_blocked_state;
381			ReleaseMutex(g_mutex);
382
383	ossman_	1071	show = LOWORD(lparam);
384	ossman_	1069
385	ossman_	1128	if ((show == SW_NORMAL) \|\| (show == SW_SHOWNORMAL)
386			\|\| (show == SW_RESTORE))
387	ossman_	1079	state = 0;
388	ossman_	1106	else if ((show == SW_MINIMIZE) \|\| (show == SW_SHOWMINIMIZED))
389	ossman_	1079	state = 1;
390	ossman_	1106	else if ((show == SW_MAXIMIZE) \|\| (show == SW_SHOWMAXIMIZED))
391	ossman_	1079	state = 2;
392	ossman_	1100	else
393	ossman_	1106	{
394			debug("Unexpected show: %d", show);
395	ossman_	1100	break;
396	ossman_	1106	}
397	ossman_	1160
398	ossman_	1165	if ((blocked_hwnd == (HWND) wparam) && (blocked == state))
399			vchannel_write("ACK", "%u", serial);
400			else
401	ossman_	1163	vchannel_write("STATE", "0x%p,0x%x,0x%x", (HWND) wparam,
402			state, 0);
403	ossman_	1160
404	ossman_	1071	break;
405			}
406	ossman_	1069
407	ossman_	1071	default:
408			break;
409			}
410	ossman_	1069
411	ossman_	1071	end:
412			return CallNextHookEx(g_cbt_hook, code, wparam, lparam);
413	ossman_	1069	}
414
415	ossman_	1071	DLL_EXPORT void
416			SetHooks(void)
417	ossman_	1069	{
418	ossman_	1071	if (!g_cbt_hook)
419			g_cbt_hook = SetWindowsHookEx(WH_CBT, cbt_hook_proc, g_instance, 0);
420	ossman_	1069
421	ossman_	1071	if (!g_wndproc_hook)
422			g_wndproc_hook = SetWindowsHookEx(WH_CALLWNDPROC, wndproc_hook_proc, g_instance, 0);
423	ossman_	1134
424			if (!g_wndprocret_hook)
425			g_wndprocret_hook =
426			SetWindowsHookEx(WH_CALLWNDPROCRET, wndprocret_hook_proc, g_instance, 0);
427	ossman_	1069	}
428
429	ossman_	1071	DLL_EXPORT void
430			RemoveHooks(void)
431	ossman_	1069	{
432	ossman_	1071	if (g_cbt_hook)
433			UnhookWindowsHookEx(g_cbt_hook);
434	ossman_	1069
435	ossman_	1071	if (g_wndproc_hook)
436			UnhookWindowsHookEx(g_wndproc_hook);
437	ossman_	1134
438			if (g_wndprocret_hook)
439			UnhookWindowsHookEx(g_wndprocret_hook);
440	ossman_	1069	}
441
442	ossman_	1145	DLL_EXPORT void
443	ossman_	1165	SafeMoveWindow(unsigned int serial, HWND hwnd, int x, int y, int width, int height)
444	ossman_	1145	{
445	ossman_	1165	RECT rect;
446
447	ossman_	1145	WaitForSingleObject(g_mutex, INFINITE);
448	ossman_	1161	g_block_move_hwnd = hwnd;
449	ossman_	1165	g_block_move_serial = serial;
450	ossman_	1145	g_block_move.left = x;
451			g_block_move.top = y;
452			g_block_move.right = x + width;
453			g_block_move.bottom = y + height;
454			ReleaseMutex(g_mutex);
455
456			SetWindowPos(hwnd, NULL, x, y, width, height, SWP_NOACTIVATE \| SWP_NOZORDER);
457
458	ossman_	1167	vchannel_write("ACK", "%u", serial);
459
460			if (!GetWindowRect(hwnd, &rect))
461			debug("GetWindowRect failed!\n");
462			else if ((rect.left != x) \|\| (rect.top != y) \|\| (rect.right != x + width)
463			\|\| (rect.bottom != y + height))
464			update_position(hwnd);
465
466	ossman_	1145	WaitForSingleObject(g_mutex, INFINITE);
467	ossman_	1161	g_block_move_hwnd = NULL;
468	ossman_	1145	memset(&g_block_move, 0, sizeof(RECT));
469			ReleaseMutex(g_mutex);
470			}
471
472	ossman_	1158	DLL_EXPORT void
473	ossman_	1165	SafeZChange(unsigned int serial, HWND hwnd, HWND behind)
474	ossman_	1158	{
475			WaitForSingleObject(g_mutex, INFINITE);
476	ossman_	1165	g_blocked_zchange_serial = serial;
477	ossman_	1158	g_blocked_zchange[0] = hwnd;
478			g_blocked_zchange[1] = behind;
479			ReleaseMutex(g_mutex);
480
481	ossman_	1162	if (behind == NULL)
482			behind = HWND_TOP;
483
484	ossman_	1158	SetWindowPos(hwnd, behind, 0, 0, 0, 0, SWP_NOACTIVATE \| SWP_NOMOVE \| SWP_NOSIZE);
485
486			WaitForSingleObject(g_mutex, INFINITE);
487			g_blocked_zchange[0] = NULL;
488			g_blocked_zchange[1] = NULL;
489			ReleaseMutex(g_mutex);
490			}
491
492			DLL_EXPORT void
493	ossman_	1165	SafeFocus(unsigned int serial, HWND hwnd)
494	ossman_	1158	{
495			WaitForSingleObject(g_mutex, INFINITE);
496	ossman_	1165	g_blocked_focus_serial = serial;
497	ossman_	1158	g_blocked_focus = hwnd;
498			ReleaseMutex(g_mutex);
499
500			SendMessage(hwnd, g_wm_seamless_focus, 0, 0);
501
502			WaitForSingleObject(g_mutex, INFINITE);
503			g_blocked_focus = NULL;
504			ReleaseMutex(g_mutex);
505			}
506
507	ossman_	1160	DLL_EXPORT void
508	ossman_	1165	SafeSetState(unsigned int serial, HWND hwnd, int state)
509	ossman_	1160	{
510	ossman_	1165	LONG style;
511			int curstate;
512
513			vchannel_block();
514
515			style = GetWindowLong(hwnd, GWL_STYLE);
516
517			if (style & WS_MAXIMIZE)
518			curstate = 2;
519			else if (style & WS_MINIMIZE)
520			curstate = 1;
521			else
522			curstate = 0;
523
524			if (state == curstate)
525			{
526			vchannel_write("ACK", "%u", serial);
527			vchannel_unblock();
528	ossman_	1167	return;
529	ossman_	1165	}
530
531	ossman_	1160	WaitForSingleObject(g_mutex, INFINITE);
532	ossman_	1161	g_blocked_state_hwnd = hwnd;
533	ossman_	1165	g_blocked_state_serial = serial;
534	ossman_	1160	g_blocked_state = state;
535			ReleaseMutex(g_mutex);
536
537	ossman_	1165	vchannel_unblock();
538
539	ossman_	1160	if (state == 0)
540			ShowWindow(hwnd, SW_RESTORE);
541			else if (state == 1)
542			ShowWindow(hwnd, SW_MINIMIZE);
543			else if (state == 2)
544			ShowWindow(hwnd, SW_MAXIMIZE);
545			else
546			debug("Invalid state %d sent.", state);
547
548			WaitForSingleObject(g_mutex, INFINITE);
549	ossman_	1161	g_blocked_state_hwnd = NULL;
550	ossman_	1160	g_blocked_state = -1;
551			ReleaseMutex(g_mutex);
552			}
553
554	ossman_	1071	DLL_EXPORT int
555			GetInstanceCount()
556	ossman_	1069	{
557	ossman_	1071	return g_instance_count;
558	ossman_	1069	}
559
560	ossman_	1071	BOOL APIENTRY
561			DllMain(HINSTANCE hinstDLL, DWORD ul_reason_for_call, LPVOID lpReserved)
562	ossman_	1069	{
563	ossman_	1071	switch (ul_reason_for_call)
564			{
565			case DLL_PROCESS_ATTACH:
566			// remember our instance handle
567			g_instance = hinstDLL;
568	ossman_	1069
569	ossman_	1073	g_mutex = CreateMutex(NULL, FALSE, "Local\\SeamlessDLL");
570	ossman_	1071	if (!g_mutex)
571			return FALSE;
572	ossman_	1069
573	ossman_	1071	WaitForSingleObject(g_mutex, INFINITE);
574			++g_instance_count;
575			ReleaseMutex(g_mutex);
576	ossman_	1069
577	ossman_	1153	g_wm_seamless_focus = RegisterWindowMessage(FOCUS_MSG_NAME);
578
579	ossman_	1071	vchannel_open();
580	ossman_	1069
581	ossman_	1071	break;
582	ossman_	1069
583	ossman_	1071	case DLL_THREAD_ATTACH:
584			break;
585	ossman_	1069
586	ossman_	1071	case DLL_THREAD_DETACH:
587			break;
588	ossman_	1069
589	ossman_	1071	case DLL_PROCESS_DETACH:
590			WaitForSingleObject(g_mutex, INFINITE);
591			--g_instance_count;
592			ReleaseMutex(g_mutex);
593	ossman_	1069
594	ossman_	1071	vchannel_close();
595	ossman_	1069
596	ossman_	1071	CloseHandle(g_mutex);
597	ossman_	1069
598	ossman_	1071	break;
599			}
600	ossman_	1069
601	ossman_	1071	return TRUE;
602	ossman_	1069	}