/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved. * Copyright 2011 Pierre Ossman for Cendio AB * * This 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 software 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 software; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, * USA. */ #include #define XK_MISCELLANY #define XK_XKB_KEYS #include #include #include "keysym2ucs.h" #define NoSymbol 0 // Missing in at least some versions of MinGW #ifndef MAPVK_VK_TO_CHAR #define MAPVK_VK_TO_CHAR 2 #endif static HANDLE thread; static DWORD thread_id; static HHOOK hook = 0; static HWND target_wnd = 0; static int is_system_hotkey(int vkCode) { switch (vkCode) { case VK_LWIN: case VK_RWIN: case VK_SNAPSHOT: return 1; case VK_TAB: if (GetAsyncKeyState(VK_MENU) & 0x8000) return 1; case VK_ESCAPE: if (GetAsyncKeyState(VK_MENU) & 0x8000) return 1; if (GetAsyncKeyState(VK_CONTROL) & 0x8000) return 1; } return 0; } static LRESULT CALLBACK keyboard_hook(int nCode, WPARAM wParam, LPARAM lParam) { if (nCode >= 0) { KBDLLHOOKSTRUCT* msgInfo = (KBDLLHOOKSTRUCT*)lParam; // Grabbing everything seems to mess up some keyboard state that // FLTK relies on, so just grab the keys that we normally cannot. if (is_system_hotkey(msgInfo->vkCode)) { PostMessage(target_wnd, wParam, msgInfo->vkCode, (msgInfo->scanCode & 0xff) << 16 | (msgInfo->flags & 0xff) << 24); return 1; } } return CallNextHookEx(hook, nCode, wParam, lParam); } static DWORD WINAPI keyboard_thread(LPVOID data) { MSG msg; target_wnd = (HWND)data; // Make sure a message queue is created PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE | PM_NOYIELD); hook = SetWindowsHookEx(WH_KEYBOARD_LL, keyboard_hook, GetModuleHandle(0), 0); // If something goes wrong then there is not much we can do. // Just sit around and wait for WM_QUIT... while (GetMessage(&msg, NULL, 0, 0)); if (hook) UnhookWindowsHookEx(hook); target_wnd = 0; return 0; } int win32_enable_lowlevel_keyboard(HWND hwnd) { // Only one target at a time for now if (thread != NULL) { if (hwnd == target_wnd) return 0; return 1; } // We create a separate thread as it is crucial that hooks are processed // in a timely manner. thread = CreateThread(NULL, 0, keyboard_thread, hwnd, 0, &thread_id); if (thread == NULL) return 1; return 0; } void win32_disable_lowlevel_keyboard(HWND hwnd) { if (hwnd != target_wnd) return; PostThreadMessage(thread_id, WM_QUIT, 0, 0); CloseHandle(thread); thread = NULL; } static const int vkey_map[][3] = { { VK_BACK, XK_BackSpace, NoSymbol }, { VK_TAB, XK_Tab, NoSymbol }, { VK_CLEAR, XK_Clear, NoSymbol }, { VK_RETURN, XK_Return, XK_KP_Enter }, { VK_SHIFT, XK_Shift_L, NoSymbol }, { VK_CONTROL, XK_Control_L, XK_Control_R }, { VK_MENU, XK_Alt_L, XK_Alt_R }, { VK_PAUSE, XK_Pause, NoSymbol }, { VK_CAPITAL, XK_Caps_Lock, NoSymbol }, /* FIXME: IME keys */ { VK_ESCAPE, XK_Escape, NoSymbol }, { VK_PRIOR, XK_KP_Prior, XK_Prior }, { VK_NEXT, XK_KP_Next, XK_Next }, { VK_END, XK_KP_End, XK_End }, { VK_HOME, XK_KP_Home, XK_Home }, { VK_LEFT, XK_KP_Left, XK_Left }, { VK_UP, XK_KP_Up, XK_Up }, { VK_RIGHT, XK_KP_Right, XK_Right }, { VK_DOWN, XK_KP_Down, XK_Down }, { VK_SNAPSHOT, XK_Print, NoSymbol }, { VK_INSERT, XK_KP_Insert, XK_Insert }, { VK_DELETE, XK_KP_Delete, XK_Delete }, { VK_LWIN, NoSymbol, XK_Super_L }, { VK_RWIN, NoSymbol, XK_Super_R }, { VK_APPS, NoSymbol, XK_Menu }, { VK_SLEEP, NoSymbol, XF86XK_Sleep }, { VK_NUMPAD0, XK_KP_0, NoSymbol }, { VK_NUMPAD1, XK_KP_1, NoSymbol }, { VK_NUMPAD2, XK_KP_2, NoSymbol }, { VK_NUMPAD3, XK_KP_3, NoSymbol }, { VK_NUMPAD4, XK_KP_4, NoSymbol }, { VK_NUMPAD5, XK_KP_5, NoSymbol }, { VK_NUMPAD6, XK_KP_6, NoSymbol }, { VK_NUMPAD7, XK_KP_7, NoSymbol }, { VK_NUMPAD8, XK_KP_8, NoSymbol }, { VK_NUMPAD9, XK_KP_9, NoSymbol }, { VK_MULTIPLY, XK_KP_Multiply, NoSymbol }, { VK_ADD, XK_KP_Add, NoSymbol }, { VK_SUBTRACT, XK_KP_Subtract, NoSymbol }, { VK_DIVIDE, NoSymbol, XK_KP_Divide }, /* VK_SEPARATOR and VK_DECIMAL left out on purpose. See further down. */ { VK_F1, XK_F1, NoSymbol }, { VK_F2, XK_F2, NoSymbol }, { VK_F3, XK_F3, NoSymbol }, { VK_F4, XK_F4, NoSymbol }, { VK_F5, XK_F5, NoSymbol }, { VK_F6, XK_F6, NoSymbol }, { VK_F7, XK_F7, NoSymbol }, { VK_F8, XK_F8, NoSymbol }, { VK_F9, XK_F9, NoSymbol }, { VK_F10, XK_F10, NoSymbol }, { VK_F11, XK_F11, NoSymbol }, { VK_F12, XK_F12, NoSymbol }, { VK_F13, XK_F13, NoSymbol }, { VK_F14, XK_F14, NoSymbol }, { VK_F15, XK_F15, NoSymbol }, { VK_F16, XK_F16, NoSymbol }, { VK_F17, XK_F17, NoSymbol }, { VK_F18, XK_F18, NoSymbol }, { VK_F19, XK_F19, NoSymbol }, { VK_F20, XK_F20, NoSymbol }, { VK_F21, XK_F21, NoSymbol }, { VK_F22, XK_F22, NoSymbol }, { VK_F23, XK_F23, NoSymbol }, { VK_F24, XK_F24, NoSymbol }, { VK_NUMLOCK, NoSymbol, XK_Num_Lock }, { VK_SCROLL, XK_Scroll_Lock, NoSymbol }, { VK_BROWSER_BACK, NoSymbol, XF86XK_Back }, { VK_BROWSER_FORWARD, NoSymbol, XF86XK_Forward }, { VK_BROWSER_REFRESH, NoSymbol, XF86XK_Refresh }, { VK_BROWSER_STOP, NoSymbol, XF86XK_Stop }, { VK_BROWSER_SEARCH, NoSymbol, XF86XK_Search }, { VK_BROWSER_FAVORITES, NoSymbol, XF86XK_Favorites }, { VK_BROWSER_HOME, NoSymbol, XF86XK_HomePage }, { VK_VOLUME_MUTE, NoSymbol, XF86XK_AudioMute }, { VK_VOLUME_DOWN, NoSymbol, XF86XK_AudioLowerVolume }, { VK_VOLUME_UP, NoSymbol, XF86XK_AudioRaiseVolume }, { VK_MEDIA_NEXT_TRACK, NoSymbol, XF86XK_AudioNext }, { VK_MEDIA_PREV_TRACK, NoSymbol, XF86XK_AudioPrev }, { VK_MEDIA_STOP, NoSymbol, XF86XK_AudioStop }, { VK_MEDIA_PLAY_PAUSE, NoSymbol, XF86XK_AudioPlay }, { VK_LAUNCH_MAIL, NoSymbol, XF86XK_Mail }, { VK_LAUNCH_APP2, NoSymbol, XF86XK_Calculator }, }; int win32_vkey_to_keysym(UINT vkey, int extended) { int i; BYTE state[256]; int ret; WCHAR wstr[10]; // Start with keys that either don't generate a symbol, or // generate the same symbol as some other key. for (i = 0;i < sizeof(vkey_map)/sizeof(vkey_map[0]);i++) { if (vkey == vkey_map[i][0]) { if (extended) return vkey_map[i][2]; else return vkey_map[i][1]; } } // Windows is not consistent in which virtual key it uses for // the numpad decimal key, and this is not likely to be fixed: // http://blogs.msdn.com/michkap/archive/2006/09/13/752377.aspx // // To get X11 behaviour, we instead look at the text generated // by they key. if ((vkey == VK_DECIMAL) || (vkey == VK_SEPARATOR)) { UINT ch; ch = MapVirtualKey(vkey, MAPVK_VK_TO_CHAR); switch (ch) { case ',': return XK_KP_Separator; case '.': return XK_KP_Decimal; default: return NoSymbol; } } // MapVirtualKey() doesn't look at modifiers, so it is // insufficient for mapping most keys to a symbol. ToUnicode() // does what we want though. Unfortunately it keeps state, so // we have to be careful around dead characters. GetKeyboardState(state); // Pressing Ctrl wreaks havoc with the symbol lookup, so turn // that off. But AltGr shows up as Ctrl+Alt in Windows, so keep // Ctrl if Alt is active. if (!(state[VK_LCONTROL] & 0x80) || !(state[VK_RMENU] & 0x80)) state[VK_CONTROL] = state[VK_LCONTROL] = state[VK_RCONTROL] = 0; // FIXME: Multi character results, like U+0644 U+0627 // on Arabic layout ret = ToUnicode(vkey, 0, state, wstr, sizeof(wstr)/sizeof(wstr[0]), 0); if (ret == 0) { // Most Ctrl+Alt combinations will fail to produce a symbol, so // try it again with Ctrl unconditionally disabled. state[VK_CONTROL] = state[VK_LCONTROL] = state[VK_RCONTROL] = 0; ret = ToUnicode(vkey, 0, state, wstr, sizeof(wstr)/sizeof(wstr[0]), 0); } if (ret == 1) return ucs2keysym(wstr[0]); if (ret == -1) { WCHAR dead_char; dead_char = wstr[0]; // Need to clear out the state that the dead key has caused. // This is the recommended method by Microsoft's engineers: // http://blogs.msdn.com/b/michkap/archive/2007/10/27/5717859.aspx do { ret = ToUnicode(vkey, 0, state, wstr, sizeof(wstr)/sizeof(wstr[0]), 0); } while (ret < 0); // Dead keys are represented by their spacing equivalent // (or something similar depending on the layout) return ucs2keysym(ucs2combining(dead_char)); } return NoSymbol; }