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/* -*- c-basic-offset: 8 -*- |
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rdesktop: A Remote Desktop Protocol client. |
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Seamless windows - Remote server hook DLL |
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|
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Based on code copyright (C) 2004-2005 Martin Wickett |
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|
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Copyright (C) Peter Åstrand <astrand@cendio.se> 2005-2006 |
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Copyright (C) Pierre Ossman <ossman@cendio.se> 2006 |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdarg.h> |
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|
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#include <windows.h> |
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#include <winuser.h> |
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|
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#include "../vchannel.h" |
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|
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#define DLL_EXPORT __declspec(dllexport) |
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|
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#ifdef __GNUC__ |
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#define SHARED __attribute__((section ("SHAREDDATA"), shared)) |
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#else |
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#define SHARED |
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#endif |
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|
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// Shared DATA |
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#pragma data_seg ( "SHAREDDATA" ) |
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|
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// this is the total number of processes this dll is currently attached to |
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int g_instance_count SHARED = 0; |
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|
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// blocks for locally generated events |
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RECT g_block_move SHARED = { 0, 0, 0, 0 }; |
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|
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#pragma data_seg () |
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|
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#pragma comment(linker, "/section:SHAREDDATA,rws") |
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|
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#define FOCUS_MSG_NAME "WM_SEAMLESS_FOCUS" |
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static UINT g_wm_seamless_focus; |
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|
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static HHOOK g_cbt_hook = NULL; |
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static HHOOK g_wndproc_hook = NULL; |
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static HHOOK g_wndprocret_hook = NULL; |
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|
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static HINSTANCE g_instance = NULL; |
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|
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static HANDLE g_mutex = NULL; |
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|
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static void |
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update_position(HWND hwnd) |
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{ |
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RECT rect, blocked; |
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|
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if (!GetWindowRect(hwnd, &rect)) |
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{ |
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debug("GetWindowRect failed!\n"); |
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return; |
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} |
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|
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WaitForSingleObject(g_mutex, INFINITE); |
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memcpy(&blocked, &g_block_move, sizeof(RECT)); |
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ReleaseMutex(g_mutex); |
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|
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if ((rect.left == blocked.left) && (rect.top == blocked.top) |
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&& (rect.right == blocked.right) && (rect.bottom == blocked.bottom)) |
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return; |
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|
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vchannel_write("POSITION,0x%p,%d,%d,%d,%d,0x%x", |
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hwnd, |
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rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, 0); |
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} |
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|
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static LRESULT CALLBACK |
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wndproc_hook_proc(int code, WPARAM cur_thread, LPARAM details) |
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{ |
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HWND hwnd, parent; |
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UINT msg; |
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WPARAM wparam; |
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LPARAM lparam; |
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|
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LONG style; |
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|
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if (code < 0) |
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goto end; |
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|
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hwnd = ((CWPSTRUCT *) details)->hwnd; |
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msg = ((CWPSTRUCT *) details)->message; |
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wparam = ((CWPSTRUCT *) details)->wParam; |
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lparam = ((CWPSTRUCT *) details)->lParam; |
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|
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style = GetWindowLong(hwnd, GWL_STYLE); |
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|
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/* Docs say that WS_CHILD and WS_POPUP is an illegal combination, |
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but they exist nonetheless. */ |
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if ((style & WS_CHILD) && !(style & WS_POPUP)) |
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goto end; |
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|
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if (style & WS_POPUP) |
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{ |
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parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT); |
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if (!parent) |
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parent = (HWND) - 1; |
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} |
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else |
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parent = NULL; |
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|
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switch (msg) |
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{ |
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|
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case WM_WINDOWPOSCHANGED: |
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{ |
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WINDOWPOS *wp = (WINDOWPOS *) lparam; |
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|
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if (wp->flags & SWP_SHOWWINDOW) |
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{ |
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unsigned short title[150]; |
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int state; |
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|
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vchannel_write("CREATE,0x%p,0x%p,0x%x", hwnd, parent, 0); |
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|
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GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title)); |
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|
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vchannel_write("TITLE,0x%x,%s,0x%x", hwnd, |
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vchannel_strfilter_unicode(title), 0); |
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|
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if (style & WS_MAXIMIZE) |
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state = 2; |
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else if (style & WS_MINIMIZE) |
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state = 1; |
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else |
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state = 0; |
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|
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update_position(hwnd); |
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|
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vchannel_write("STATE,0x%p,0x%x,0x%x", hwnd, state, 0); |
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} |
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|
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if (wp->flags & SWP_HIDEWINDOW) |
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vchannel_write("DESTROY,0x%p,0x%x", hwnd, 0); |
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|
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if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE)) |
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break; |
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|
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if (!(wp->flags & SWP_NOMOVE && wp->flags & SWP_NOSIZE)) |
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update_position(hwnd); |
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|
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if (!(wp->flags & SWP_NOZORDER)) |
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{ |
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vchannel_write("ZCHANGE,0x%p,0x%p,0x%x", |
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hwnd, |
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wp->flags & SWP_NOACTIVATE ? wp-> |
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hwndInsertAfter : 0, 0); |
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} |
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|
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break; |
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} |
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|
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case WM_SIZE: |
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if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE)) |
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break; |
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update_position(hwnd); |
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break; |
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|
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case WM_MOVE: |
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if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE)) |
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break; |
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update_position(hwnd); |
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break; |
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|
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case WM_DESTROY: |
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if (!(style & WS_VISIBLE)) |
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break; |
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vchannel_write("DESTROY,0x%p,0x%x", hwnd, 0); |
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break; |
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|
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default: |
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break; |
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} |
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|
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end: |
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return CallNextHookEx(g_wndproc_hook, code, cur_thread, details); |
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} |
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|
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static LRESULT CALLBACK |
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wndprocret_hook_proc(int code, WPARAM cur_thread, LPARAM details) |
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{ |
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HWND hwnd, parent; |
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UINT msg; |
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WPARAM wparam; |
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LPARAM lparam; |
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|
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LONG style; |
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|
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if (code < 0) |
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goto end; |
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|
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hwnd = ((CWPRETSTRUCT *) details)->hwnd; |
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msg = ((CWPRETSTRUCT *) details)->message; |
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wparam = ((CWPRETSTRUCT *) details)->wParam; |
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lparam = ((CWPRETSTRUCT *) details)->lParam; |
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|
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style = GetWindowLong(hwnd, GWL_STYLE); |
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|
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/* Docs say that WS_CHILD and WS_POPUP is an illegal combination, |
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but they exist nonetheless. */ |
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if ((style & WS_CHILD) && !(style & WS_POPUP)) |
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goto end; |
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|
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switch (msg) |
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{ |
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case WM_SETTEXT: |
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{ |
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unsigned short title[150]; |
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if (!(style & WS_VISIBLE)) |
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break; |
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/* We cannot use the string in lparam because |
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we need unicode. */ |
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GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title)); |
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vchannel_write("TITLE,0x%p,%s,0x%x", hwnd, |
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vchannel_strfilter_unicode(title), 0); |
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break; |
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} |
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|
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default: |
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break; |
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} |
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|
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if (msg == g_wm_seamless_focus) |
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SetFocus(hwnd); |
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|
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end: |
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return CallNextHookEx(g_wndprocret_hook, code, cur_thread, details); |
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} |
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|
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static LRESULT CALLBACK |
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cbt_hook_proc(int code, WPARAM wparam, LPARAM lparam) |
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{ |
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if (code < 0) |
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goto end; |
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|
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switch (code) |
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{ |
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case HCBT_MINMAX: |
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{ |
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int show, state; |
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|
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show = LOWORD(lparam); |
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|
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if ((show == SW_NORMAL) || (show == SW_SHOWNORMAL) |
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|| (show == SW_RESTORE)) |
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state = 0; |
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else if ((show == SW_MINIMIZE) || (show == SW_SHOWMINIMIZED)) |
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state = 1; |
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else if ((show == SW_MAXIMIZE) || (show == SW_SHOWMAXIMIZED)) |
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state = 2; |
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else |
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{ |
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debug("Unexpected show: %d", show); |
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break; |
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} |
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vchannel_write("STATE,0x%p,0x%x,0x%x", (HWND) wparam, state, 0); |
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break; |
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} |
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|
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default: |
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break; |
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} |
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|
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end: |
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return CallNextHookEx(g_cbt_hook, code, wparam, lparam); |
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} |
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|
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DLL_EXPORT void |
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SetHooks(void) |
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{ |
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if (!g_cbt_hook) |
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g_cbt_hook = SetWindowsHookEx(WH_CBT, cbt_hook_proc, g_instance, 0); |
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|
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if (!g_wndproc_hook) |
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g_wndproc_hook = SetWindowsHookEx(WH_CALLWNDPROC, wndproc_hook_proc, g_instance, 0); |
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|
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if (!g_wndprocret_hook) |
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g_wndprocret_hook = |
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SetWindowsHookEx(WH_CALLWNDPROCRET, wndprocret_hook_proc, g_instance, 0); |
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} |
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|
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DLL_EXPORT void |
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RemoveHooks(void) |
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{ |
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if (g_cbt_hook) |
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UnhookWindowsHookEx(g_cbt_hook); |
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|
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if (g_wndproc_hook) |
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UnhookWindowsHookEx(g_wndproc_hook); |
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|
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if (g_wndprocret_hook) |
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UnhookWindowsHookEx(g_wndprocret_hook); |
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} |
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|
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DLL_EXPORT void |
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SafeMoveWindow(HWND hwnd, int x, int y, int width, int height) |
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{ |
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WaitForSingleObject(g_mutex, INFINITE); |
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g_block_move.left = x; |
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g_block_move.top = y; |
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g_block_move.right = x + width; |
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g_block_move.bottom = y + height; |
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ReleaseMutex(g_mutex); |
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|
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SetWindowPos(hwnd, NULL, x, y, width, height, SWP_NOACTIVATE | SWP_NOZORDER); |
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|
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WaitForSingleObject(g_mutex, INFINITE); |
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memset(&g_block_move, 0, sizeof(RECT)); |
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ReleaseMutex(g_mutex); |
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} |
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|
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DLL_EXPORT int |
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GetInstanceCount() |
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{ |
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return g_instance_count; |
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} |
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|
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BOOL APIENTRY |
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DllMain(HINSTANCE hinstDLL, DWORD ul_reason_for_call, LPVOID lpReserved) |
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{ |
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switch (ul_reason_for_call) |
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{ |
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case DLL_PROCESS_ATTACH: |
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// remember our instance handle |
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g_instance = hinstDLL; |
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|
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g_mutex = CreateMutex(NULL, FALSE, "Local\\SeamlessDLL"); |
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if (!g_mutex) |
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return FALSE; |
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|
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WaitForSingleObject(g_mutex, INFINITE); |
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++g_instance_count; |
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ReleaseMutex(g_mutex); |
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|
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g_wm_seamless_focus = RegisterWindowMessage(FOCUS_MSG_NAME); |
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|
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vchannel_open(); |
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|
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break; |
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|
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case DLL_THREAD_ATTACH: |
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break; |
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|
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case DLL_THREAD_DETACH: |
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break; |
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|
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case DLL_PROCESS_DETACH: |
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WaitForSingleObject(g_mutex, INFINITE); |
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--g_instance_count; |
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ReleaseMutex(g_mutex); |
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|
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vchannel_close(); |
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|
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CloseHandle(g_mutex); |
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|
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break; |
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} |
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|
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return TRUE; |
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} |
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