921 lines
23 KiB
C++
921 lines
23 KiB
C++
/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2002 Chris Schoeneman
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*
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* This package is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* found in the file COPYING that should have accompanied this file.
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*
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* This package 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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#include "CSynergyHook.h"
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#include "ProtocolTypes.h"
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#include <zmouse.h>
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//
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// debugging compile flag. when not zero the server doesn't grab
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// the keyboard when the mouse leaves the server screen. this
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// makes it possible to use the debugger (via the keyboard) when
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// all user input would normally be caught by the hook procedures.
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//
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#define NO_GRAB_KEYBOARD 0
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//
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// debugging compile flag. when not zero the server will not
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// install low level hooks.
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//
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#define NO_LOWLEVEL_HOOKS 0
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//
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// extra mouse wheel stuff
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//
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enum EWheelSupport {
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kWheelNone,
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kWheelOld,
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kWheelWin2000,
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kWheelModern
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};
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// declare extended mouse hook struct. useable on win2k
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typedef struct tagMOUSEHOOKSTRUCTWin2000 {
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MOUSEHOOKSTRUCT mhs;
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DWORD mouseData;
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} MOUSEHOOKSTRUCTWin2000;
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#if !defined(SM_MOUSEWHEELPRESENT)
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#define SM_MOUSEWHEELPRESENT 75
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#endif
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// X button stuff
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#if !defined(WM_XBUTTONDOWN)
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#define WM_XBUTTONDOWN 0x020B
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#define WM_XBUTTONUP 0x020C
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#define WM_XBUTTONDBLCLK 0x020D
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#define WM_NCXBUTTONDOWN 0x00AB
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#define WM_NCXBUTTONUP 0x00AC
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#define WM_NCXBUTTONDBLCLK 0x00AD
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#define MOUSEEVENTF_XDOWN 0x0100
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#define MOUSEEVENTF_XUP 0x0200
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#define XBUTTON1 0x0001
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#define XBUTTON2 0x0002
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#endif
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//
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// globals
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//
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#pragma comment(linker, "-section:shared,rws")
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#pragma data_seg("shared")
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// all data in this shared section *must* be initialized
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static HINSTANCE g_hinstance = NULL;
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static DWORD g_processID = 0;
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static EWheelSupport g_wheelSupport = kWheelNone;
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static UINT g_wmMouseWheel = 0;
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static DWORD g_threadID = 0;
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static HHOOK g_keyboard = NULL;
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static HHOOK g_mouse = NULL;
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static HHOOK g_getMessage = NULL;
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static HHOOK g_keyboardLL = NULL;
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static HHOOK g_mouseLL = NULL;
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static bool g_screenSaver = false;
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static EHookMode g_mode = kHOOK_DISABLE;
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static UInt32 g_zoneSides = 0;
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static SInt32 g_zoneSize = 0;
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static SInt32 g_xScreen = 0;
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static SInt32 g_yScreen = 0;
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static SInt32 g_wScreen = 0;
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static SInt32 g_hScreen = 0;
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static WPARAM g_deadVirtKey = 0;
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static LPARAM g_deadLParam = 0;
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static BYTE g_deadKeyState[256] = { 0 };
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static DWORD g_hookThread = 0;
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static DWORD g_attachedThread = 0;
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#pragma data_seg()
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// keep linker quiet about floating point stuff. we don't use any
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// floating point operations but our includes may define some
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// (unused) floating point values.
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#ifndef _DEBUG
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extern "C" int _fltused=0;
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#endif
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//
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// internal functions
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//
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static
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void
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attachThreadToForeground()
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{
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// only attach threads if using low level hooks. a low level hook
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// runs in the thread that installed the hook but we have to make
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// changes that require being attached to the target thread (which
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// should be the foreground window). a regular hook runs in the
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// thread that just removed the event from its queue so we're
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// already in the right thread.
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if (g_hookThread != 0) {
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HWND window = GetForegroundWindow();
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DWORD threadID = GetWindowThreadProcessId(window, NULL);
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// skip if no change
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if (g_attachedThread != threadID) {
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// detach from previous thread
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if (g_attachedThread != 0 && g_attachedThread != g_hookThread) {
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AttachThreadInput(g_hookThread, g_attachedThread, FALSE);
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}
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// attach to new thread
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g_attachedThread = threadID;
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if (g_attachedThread != 0 && g_attachedThread != g_hookThread) {
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AttachThreadInput(g_hookThread, g_attachedThread, TRUE);
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}
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}
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}
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}
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static
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void
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detachThread()
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{
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if (g_attachedThread != 0) {
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AttachThreadInput(g_hookThread, g_attachedThread, FALSE);
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g_attachedThread = 0;
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}
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}
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#if !NO_GRAB_KEYBOARD
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static
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WPARAM
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makeKeyMsg(UINT virtKey, char c)
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{
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return MAKEWPARAM(MAKEWORD(virtKey & 0xff, (BYTE)c), 0);
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}
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static
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void
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keyboardGetState(BYTE keys[256])
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{
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if (g_hookThread != 0) {
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GetKeyboardState(keys);
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}
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else {
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SHORT key;
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for (int i = 0; i < 256; ++i) {
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key = GetAsyncKeyState(i);
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keys[i] = (BYTE)((key < 0) ? 0x80u : 0);
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}
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key = GetKeyState(VK_CAPITAL);
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keys[VK_CAPITAL] = (BYTE)(((key < 0) ? 0x80 : 0) | (key & 1));
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}
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}
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static
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bool
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keyboardHookHandler(WPARAM wParam, LPARAM lParam)
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{
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attachThreadToForeground();
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// check for dead keys. we don't forward those to our window.
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// instead we'll leave the key in the keyboard layout (a buffer
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// internal to the system) for translation when the next key is
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// pressed.
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UINT c = MapVirtualKey(wParam, 2);
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if ((c & 0x80000000u) != 0) {
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if ((lParam & 0x80000000u) == 0) {
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if (g_deadVirtKey == 0) {
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// dead key press, no dead key in the buffer
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g_deadVirtKey = wParam;
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g_deadLParam = lParam;
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keyboardGetState(g_deadKeyState);
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return false;
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}
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// second dead key press in a row so let it pass
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}
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else {
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// dead key release
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return false;
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}
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}
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// convert key to a character. this combines a saved dead key,
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// if any, with this key. however, the dead key must remain in
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// the keyboard layout for the application receiving this event
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// so it can also convert the key to a character. we only do
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// this on a key press.
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WPARAM charAndVirtKey = (wParam & 0xffu);
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if (c != 0) {
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// we need the keyboard state for ToAscii()
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BYTE keys[256];
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keyboardGetState(keys);
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// ToAscii() maps ctrl+letter to the corresponding control code
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// and ctrl+backspace to delete. we don't want those translations
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// so clear the control modifier state. however, if we want to
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// simulate AltGr (which is ctrl+alt) then we must not clear it.
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UINT control = keys[VK_CONTROL] | keys[VK_LCONTROL] | keys[VK_RCONTROL];
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UINT menu = keys[VK_MENU] | keys[VK_LMENU] | keys[VK_RMENU];
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if ((control & 0x80) == 0 || (menu & 0x80) == 0) {
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keys[VK_LCONTROL] = 0;
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keys[VK_RCONTROL] = 0;
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keys[VK_CONTROL] = 0;
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}
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else {
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keys[VK_LCONTROL] = 0x80;
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keys[VK_RCONTROL] = 0x80;
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keys[VK_CONTROL] = 0x80;
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keys[VK_LMENU] = 0x80;
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keys[VK_RMENU] = 0x80;
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keys[VK_MENU] = 0x80;
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}
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// ToAscii() needs to know if a menu is active for some reason.
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// we don't know and there doesn't appear to be any way to find
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// out. so we'll just assume a menu is active if the menu key
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// is down.
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// FIXME -- figure out some way to check if a menu is active
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UINT flags = 0;
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if ((menu & 0x80) != 0)
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flags |= 1;
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// map the key event to a character. this has the side
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// effect of removing the dead key from the system's keyboard
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// layout buffer.
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WORD c = 0;
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UINT scanCode = ((lParam & 0x00ff0000u) >> 16);
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int n = ToAscii(wParam, scanCode, keys, &c, flags);
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// if mapping failed and ctrl and alt are pressed then try again
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// with both not pressed. this handles the case where ctrl and
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// alt are being used as individual modifiers rather than AltGr.
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// we have to put the dead key back first, if there was one.
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if (n == 0 && (control & 0x80) != 0 && (menu & 0x80) != 0) {
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if (g_deadVirtKey != 0) {
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ToAscii(g_deadVirtKey, (g_deadLParam & 0x00ff0000u) >> 16,
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g_deadKeyState, &c, flags);
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}
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keys[VK_LCONTROL] = 0;
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keys[VK_RCONTROL] = 0;
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keys[VK_CONTROL] = 0;
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keys[VK_LMENU] = 0;
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keys[VK_RMENU] = 0;
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keys[VK_MENU] = 0;
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n = ToAscii(wParam, scanCode, keys, &c, flags);
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}
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switch (n) {
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default:
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// key is a dead key; we're not expecting this since we
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// bailed out above for any dead key.
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g_deadVirtKey = wParam;
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g_deadLParam = lParam;
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break;
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case 0:
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// key doesn't map to a character. this can happen if
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// non-character keys are pressed after a dead key.
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break;
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case 1:
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// key maps to a character composed with dead key
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charAndVirtKey = makeKeyMsg(wParam, (char)LOBYTE(c));
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break;
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case 2: {
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// previous dead key not composed. send a fake key press
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// and release for the dead key to our window.
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WPARAM deadCharAndVirtKey =
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makeKeyMsg(g_deadVirtKey, (char)LOBYTE(c));
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PostThreadMessage(g_threadID, SYNERGY_MSG_KEY,
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deadCharAndVirtKey, g_deadLParam & 0x7fffffffu);
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PostThreadMessage(g_threadID, SYNERGY_MSG_KEY,
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deadCharAndVirtKey, g_deadLParam | 0x80000000u);
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// use uncomposed character
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charAndVirtKey = makeKeyMsg(wParam, (char)HIBYTE(c));
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break;
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}
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}
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// put back the dead key, if any, for the application to use
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if (g_deadVirtKey != 0) {
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ToAscii(g_deadVirtKey, (g_deadLParam & 0x00ff0000u) >> 16,
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g_deadKeyState, &c, flags);
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}
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// clear out old dead key state
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g_deadVirtKey = 0;
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g_deadLParam = 0;
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}
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// forward message to our window. do this whether or not we're
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// forwarding events to clients because this'll keep our thread's
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// key state table up to date. that's important for querying
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// the scroll lock toggle state.
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PostThreadMessage(g_threadID, SYNERGY_MSG_KEY, charAndVirtKey, lParam);
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// send fake key release if the user just pressed two dead keys
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// in a row, otherwise we'll lose the release because we always
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// return from the top of this function for all dead key releases.
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if ((c & 0x80000000u) != 0) {
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PostThreadMessage(g_threadID, SYNERGY_MSG_KEY,
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charAndVirtKey, lParam | 0x80000000u);
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}
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if (g_mode == kHOOK_RELAY_EVENTS) {
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// let certain keys pass through
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switch (wParam) {
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case VK_CAPITAL:
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case VK_NUMLOCK:
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case VK_SCROLL:
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// pass event on. we want to let these through to
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// the window proc because otherwise the keyboard
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// lights may not stay synchronized.
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break;
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case VK_SHIFT:
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case VK_LSHIFT:
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case VK_RSHIFT:
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case VK_CONTROL:
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case VK_LCONTROL:
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case VK_RCONTROL:
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case VK_MENU:
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case VK_LMENU:
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case VK_RMENU:
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case VK_HANGUL:
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// always pass the shift modifiers
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break;
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default:
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// discard
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return true;
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}
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}
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return false;
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}
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#endif
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static
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bool
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mouseHookHandler(WPARAM wParam, SInt32 x, SInt32 y, SInt32 data)
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{
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attachThreadToForeground();
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switch (wParam) {
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case WM_LBUTTONDOWN:
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case WM_MBUTTONDOWN:
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case WM_RBUTTONDOWN:
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case WM_XBUTTONDOWN:
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case WM_LBUTTONDBLCLK:
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case WM_MBUTTONDBLCLK:
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case WM_RBUTTONDBLCLK:
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case WM_XBUTTONDBLCLK:
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case WM_LBUTTONUP:
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case WM_MBUTTONUP:
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case WM_RBUTTONUP:
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case WM_XBUTTONUP:
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case WM_NCLBUTTONDOWN:
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case WM_NCMBUTTONDOWN:
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case WM_NCRBUTTONDOWN:
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case WM_NCXBUTTONDOWN:
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case WM_NCLBUTTONDBLCLK:
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case WM_NCMBUTTONDBLCLK:
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case WM_NCRBUTTONDBLCLK:
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case WM_NCXBUTTONDBLCLK:
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case WM_NCLBUTTONUP:
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case WM_NCMBUTTONUP:
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case WM_NCRBUTTONUP:
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case WM_NCXBUTTONUP:
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// always relay the event. eat it if relaying.
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PostThreadMessage(g_threadID, SYNERGY_MSG_MOUSE_BUTTON, wParam, data);
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return (g_mode == kHOOK_RELAY_EVENTS);
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case WM_MOUSEWHEEL:
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if (g_mode == kHOOK_RELAY_EVENTS) {
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// relay event
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PostThreadMessage(g_threadID, SYNERGY_MSG_MOUSE_WHEEL, data, 0);
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}
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return (g_mode == kHOOK_RELAY_EVENTS);
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case WM_NCMOUSEMOVE:
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case WM_MOUSEMOVE:
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if (g_mode == kHOOK_RELAY_EVENTS) {
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// relay and eat event
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PostThreadMessage(g_threadID, SYNERGY_MSG_MOUSE_MOVE, x, y);
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return true;
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}
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else if (g_mode == kHOOK_WATCH_JUMP_ZONE) {
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// check for mouse inside jump zone
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bool inside = false;
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if (!inside && (g_zoneSides & kLeftMask) != 0) {
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inside = (x < g_xScreen + g_zoneSize);
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}
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if (!inside && (g_zoneSides & kRightMask) != 0) {
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inside = (x >= g_xScreen + g_wScreen - g_zoneSize);
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}
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if (!inside && (g_zoneSides & kTopMask) != 0) {
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inside = (y < g_yScreen + g_zoneSize);
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}
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if (!inside && (g_zoneSides & kBottomMask) != 0) {
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inside = (y >= g_yScreen + g_hScreen - g_zoneSize);
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}
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// relay the event
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PostThreadMessage(g_threadID, SYNERGY_MSG_MOUSE_MOVE, x, y);
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// if inside then eat the event
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return inside;
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}
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}
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// pass the event
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return false;
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}
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#if !NO_GRAB_KEYBOARD
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static
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LRESULT CALLBACK
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keyboardHook(int code, WPARAM wParam, LPARAM lParam)
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{
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if (code >= 0) {
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// handle the message
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if (keyboardHookHandler(wParam, lParam)) {
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return 1;
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}
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}
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return CallNextHookEx(g_keyboard, code, wParam, lParam);
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}
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#endif
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static
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LRESULT CALLBACK
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mouseHook(int code, WPARAM wParam, LPARAM lParam)
|
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{
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if (code >= 0) {
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// decode message
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const MOUSEHOOKSTRUCT* info = (const MOUSEHOOKSTRUCT*)lParam;
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SInt32 x = (SInt32)info->pt.x;
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SInt32 y = (SInt32)info->pt.y;
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SInt32 w = 0;
|
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if (wParam == WM_MOUSEWHEEL) {
|
|
// win2k and other systems supporting WM_MOUSEWHEEL in
|
|
// the mouse hook are gratuitously different (and poorly
|
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// documented). if a low-level mouse hook is in place
|
|
// it should capture these events so we'll never see
|
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// them.
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switch (g_wheelSupport) {
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case kWheelModern:
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w = static_cast<SInt32>(LOWORD(info->dwExtraInfo));
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break;
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|
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case kWheelWin2000: {
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const MOUSEHOOKSTRUCTWin2000* info2k =
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(const MOUSEHOOKSTRUCTWin2000*)lParam;
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w = static_cast<SInt32>(HIWORD(info2k->mouseData));
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break;
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}
|
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}
|
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}
|
|
|
|
// handle the message. note that we don't handle X buttons
|
|
// here. that's okay because they're only supported on
|
|
// win2k and winxp and up and on those platforms we'll get
|
|
// get the mouse events through the low level hook.
|
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if (mouseHookHandler(wParam, x, y, w)) {
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return 1;
|
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}
|
|
}
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|
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return CallNextHookEx(g_mouse, code, wParam, lParam);
|
|
}
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|
|
static
|
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LRESULT CALLBACK
|
|
getMessageHook(int code, WPARAM wParam, LPARAM lParam)
|
|
{
|
|
if (code >= 0) {
|
|
if (g_screenSaver) {
|
|
MSG* msg = reinterpret_cast<MSG*>(lParam);
|
|
if (msg->message == WM_SYSCOMMAND &&
|
|
msg->wParam == SC_SCREENSAVE) {
|
|
// broadcast screen saver started message
|
|
PostThreadMessage(g_threadID,
|
|
SYNERGY_MSG_SCREEN_SAVER, TRUE, 0);
|
|
}
|
|
}
|
|
if (g_mode == kHOOK_RELAY_EVENTS) {
|
|
MSG* msg = reinterpret_cast<MSG*>(lParam);
|
|
if (msg->message == g_wmMouseWheel) {
|
|
// post message to our window
|
|
PostThreadMessage(g_threadID,
|
|
SYNERGY_MSG_MOUSE_WHEEL, msg->wParam, 0);
|
|
|
|
// zero out the delta in the message so it's (hopefully)
|
|
// ignored
|
|
msg->wParam = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
return CallNextHookEx(g_getMessage, code, wParam, lParam);
|
|
}
|
|
|
|
#if (_WIN32_WINNT >= 0x0400) && !NO_LOWLEVEL_HOOKS
|
|
|
|
//
|
|
// low-level keyboard hook -- this allows us to capture and handle
|
|
// alt+tab, alt+esc, ctrl+esc, and windows key hot keys. on the down
|
|
// side, key repeats are not reported to us.
|
|
//
|
|
|
|
#if !NO_GRAB_KEYBOARD
|
|
static
|
|
LRESULT CALLBACK
|
|
keyboardLLHook(int code, WPARAM wParam, LPARAM lParam)
|
|
{
|
|
if (code >= 0) {
|
|
// decode the message
|
|
KBDLLHOOKSTRUCT* info = reinterpret_cast<KBDLLHOOKSTRUCT*>(lParam);
|
|
WPARAM wParam = info->vkCode;
|
|
LPARAM lParam = 1; // repeat code
|
|
lParam |= (info->scanCode << 16); // scan code
|
|
if (info->flags & LLKHF_EXTENDED) {
|
|
lParam |= (1lu << 24); // extended key
|
|
}
|
|
if (info->flags & LLKHF_ALTDOWN) {
|
|
lParam |= (1lu << 29); // context code
|
|
}
|
|
if (info->flags & LLKHF_UP) {
|
|
lParam |= (1lu << 31); // transition
|
|
}
|
|
// FIXME -- bit 30 should be set if key was already down but
|
|
// we don't know that info. as a result we'll never generate
|
|
// key repeat events.
|
|
|
|
// handle the message
|
|
if (keyboardHookHandler(wParam, lParam)) {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return CallNextHookEx(g_keyboardLL, code, wParam, lParam);
|
|
}
|
|
#endif
|
|
|
|
//
|
|
// low-level mouse hook -- this allows us to capture and handle mouse
|
|
// events very early. the earlier the better.
|
|
//
|
|
|
|
static
|
|
LRESULT CALLBACK
|
|
mouseLLHook(int code, WPARAM wParam, LPARAM lParam)
|
|
{
|
|
if (code >= 0) {
|
|
// decode the message
|
|
MSLLHOOKSTRUCT* info = reinterpret_cast<MSLLHOOKSTRUCT*>(lParam);
|
|
SInt32 x = (SInt32)info->pt.x;
|
|
SInt32 y = (SInt32)info->pt.y;
|
|
SInt32 w = (SInt32)HIWORD(info->mouseData);
|
|
|
|
// handle the message
|
|
if (mouseHookHandler(wParam, x, y, w)) {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return CallNextHookEx(g_mouseLL, code, wParam, lParam);
|
|
}
|
|
|
|
#endif
|
|
|
|
static
|
|
EWheelSupport
|
|
getWheelSupport()
|
|
{
|
|
// get operating system
|
|
OSVERSIONINFO info;
|
|
info.dwOSVersionInfoSize = sizeof(info);
|
|
if (!GetVersionEx(&info)) {
|
|
return kWheelNone;
|
|
}
|
|
|
|
// see if modern wheel is present
|
|
if (GetSystemMetrics(SM_MOUSEWHEELPRESENT)) {
|
|
// note if running on win2k
|
|
if (info.dwPlatformId == VER_PLATFORM_WIN32_NT &&
|
|
info.dwMajorVersion == 5 &&
|
|
info.dwMinorVersion == 0) {
|
|
return kWheelWin2000;
|
|
}
|
|
return kWheelModern;
|
|
}
|
|
|
|
// not modern. see if we've got old-style support.
|
|
UINT wheelSupportMsg = RegisterWindowMessage(MSH_WHEELSUPPORT);
|
|
HWND wheelSupportWindow = FindWindow(MSH_WHEELMODULE_CLASS,
|
|
MSH_WHEELMODULE_TITLE);
|
|
if (wheelSupportWindow != NULL && wheelSupportMsg != 0) {
|
|
if (SendMessage(wheelSupportWindow, wheelSupportMsg, 0, 0) != 0) {
|
|
g_wmMouseWheel = RegisterWindowMessage(MSH_MOUSEWHEEL);
|
|
if (g_wmMouseWheel != 0) {
|
|
return kWheelOld;
|
|
}
|
|
}
|
|
}
|
|
|
|
// assume modern. we don't do anything special in this case
|
|
// except respond to WM_MOUSEWHEEL messages. GetSystemMetrics()
|
|
// can apparently return FALSE even if a mouse wheel is present
|
|
// though i'm not sure exactly when it does that (WinME returns
|
|
// FALSE for my logitech USB trackball).
|
|
return kWheelModern;
|
|
}
|
|
|
|
|
|
//
|
|
// external functions
|
|
//
|
|
|
|
BOOL WINAPI
|
|
DllMain(HINSTANCE instance, DWORD reason, LPVOID)
|
|
{
|
|
if (reason == DLL_PROCESS_ATTACH) {
|
|
DisableThreadLibraryCalls(instance);
|
|
if (g_processID == 0) {
|
|
g_hinstance = instance;
|
|
g_processID = GetCurrentProcessId();
|
|
}
|
|
}
|
|
else if (reason == DLL_PROCESS_DETACH) {
|
|
if (g_processID == GetCurrentProcessId()) {
|
|
uninstall();
|
|
uninstallScreenSaver();
|
|
g_processID = 0;
|
|
g_hinstance = NULL;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
extern "C" {
|
|
|
|
int
|
|
init(DWORD threadID)
|
|
{
|
|
assert(g_hinstance != NULL);
|
|
|
|
// try to open process that last called init() to see if it's
|
|
// still running or if it died without cleaning up.
|
|
if (g_processID != 0 && g_processID != GetCurrentProcessId()) {
|
|
HANDLE process = OpenProcess(STANDARD_RIGHTS_REQUIRED,
|
|
FALSE, g_processID);
|
|
if (process != NULL) {
|
|
// old process (probably) still exists so refuse to
|
|
// reinitialize this DLL (and thus steal it from the
|
|
// old process).
|
|
CloseHandle(process);
|
|
return 0;
|
|
}
|
|
|
|
// clean up after old process. the system should've already
|
|
// removed the hooks so we just need to reset our state.
|
|
g_hinstance = GetModuleHandle("synrgyhk");
|
|
g_processID = GetCurrentProcessId();
|
|
g_wheelSupport = kWheelNone;
|
|
g_threadID = 0;
|
|
g_keyboard = NULL;
|
|
g_mouse = NULL;
|
|
g_getMessage = NULL;
|
|
g_keyboardLL = NULL;
|
|
g_mouseLL = NULL;
|
|
g_screenSaver = false;
|
|
}
|
|
|
|
// save thread id. we'll post messages to this thread's
|
|
// message queue.
|
|
g_threadID = threadID;
|
|
|
|
// set defaults
|
|
g_mode = kHOOK_DISABLE;
|
|
g_zoneSides = 0;
|
|
g_zoneSize = 0;
|
|
g_xScreen = 0;
|
|
g_yScreen = 0;
|
|
g_wScreen = 0;
|
|
g_hScreen = 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
cleanup(void)
|
|
{
|
|
assert(g_hinstance != NULL);
|
|
|
|
if (g_processID == GetCurrentProcessId()) {
|
|
g_threadID = 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
EHookResult
|
|
install()
|
|
{
|
|
assert(g_hinstance != NULL);
|
|
assert(g_keyboard == NULL);
|
|
assert(g_mouse == NULL);
|
|
assert(g_getMessage == NULL || g_screenSaver);
|
|
|
|
// must be initialized
|
|
if (g_threadID == 0) {
|
|
return kHOOK_FAILED;
|
|
}
|
|
|
|
// discard old dead keys
|
|
g_deadVirtKey = 0;
|
|
g_deadLParam = 0;
|
|
|
|
// check for mouse wheel support
|
|
g_wheelSupport = getWheelSupport();
|
|
|
|
// install GetMessage hook (unless already installed)
|
|
if (g_wheelSupport == kWheelOld && g_getMessage == NULL) {
|
|
g_getMessage = SetWindowsHookEx(WH_GETMESSAGE,
|
|
&getMessageHook,
|
|
g_hinstance,
|
|
0);
|
|
}
|
|
|
|
// install low-level hooks. we require that they both get installed.
|
|
#if (_WIN32_WINNT >= 0x0400) && !NO_LOWLEVEL_HOOKS
|
|
g_mouseLL = SetWindowsHookEx(WH_MOUSE_LL,
|
|
&mouseLLHook,
|
|
g_hinstance,
|
|
0);
|
|
#if !NO_GRAB_KEYBOARD
|
|
g_keyboardLL = SetWindowsHookEx(WH_KEYBOARD_LL,
|
|
&keyboardLLHook,
|
|
g_hinstance,
|
|
0);
|
|
if (g_mouseLL == NULL || g_keyboardLL == NULL) {
|
|
if (g_keyboardLL != NULL) {
|
|
UnhookWindowsHookEx(g_keyboardLL);
|
|
g_keyboardLL = NULL;
|
|
}
|
|
if (g_mouseLL != NULL) {
|
|
UnhookWindowsHookEx(g_mouseLL);
|
|
g_mouseLL = NULL;
|
|
}
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
// install regular hooks
|
|
if (g_mouseLL == NULL) {
|
|
g_mouse = SetWindowsHookEx(WH_MOUSE,
|
|
&mouseHook,
|
|
g_hinstance,
|
|
0);
|
|
}
|
|
if (g_keyboardLL == NULL) {
|
|
g_keyboard = SetWindowsHookEx(WH_KEYBOARD,
|
|
&keyboardHook,
|
|
g_hinstance,
|
|
0);
|
|
}
|
|
|
|
// check that we got all the hooks we wanted
|
|
if ((g_getMessage == NULL && g_wheelSupport == kWheelOld) ||
|
|
#if !NO_GRAB_KEYBOARD
|
|
(g_keyboardLL == NULL && g_keyboard == NULL) ||
|
|
#endif
|
|
(g_mouseLL == NULL && g_mouse == NULL)) {
|
|
uninstall();
|
|
return kHOOK_FAILED;
|
|
}
|
|
|
|
if (g_keyboardLL != NULL || g_mouseLL != NULL) {
|
|
g_hookThread = GetCurrentThreadId();
|
|
return kHOOK_OKAY_LL;
|
|
}
|
|
|
|
return kHOOK_OKAY;
|
|
}
|
|
|
|
int
|
|
uninstall(void)
|
|
{
|
|
assert(g_hinstance != NULL);
|
|
|
|
// discard old dead keys
|
|
g_deadVirtKey = 0;
|
|
g_deadLParam = 0;
|
|
|
|
// detach from thread
|
|
detachThread();
|
|
|
|
// uninstall hooks
|
|
if (g_keyboardLL != NULL) {
|
|
UnhookWindowsHookEx(g_keyboardLL);
|
|
g_keyboardLL = NULL;
|
|
}
|
|
if (g_mouseLL != NULL) {
|
|
UnhookWindowsHookEx(g_mouseLL);
|
|
g_mouseLL = NULL;
|
|
}
|
|
if (g_keyboard != NULL) {
|
|
UnhookWindowsHookEx(g_keyboard);
|
|
g_keyboard = NULL;
|
|
}
|
|
if (g_mouse != NULL) {
|
|
UnhookWindowsHookEx(g_mouse);
|
|
g_mouse = NULL;
|
|
}
|
|
if (g_getMessage != NULL && !g_screenSaver) {
|
|
UnhookWindowsHookEx(g_getMessage);
|
|
g_getMessage = NULL;
|
|
}
|
|
g_wheelSupport = kWheelNone;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
installScreenSaver(void)
|
|
{
|
|
assert(g_hinstance != NULL);
|
|
|
|
// must be initialized
|
|
if (g_threadID == 0) {
|
|
return 0;
|
|
}
|
|
|
|
// generate screen saver messages
|
|
g_screenSaver = true;
|
|
|
|
// install hook unless it's already installed
|
|
if (g_getMessage == NULL) {
|
|
g_getMessage = SetWindowsHookEx(WH_GETMESSAGE,
|
|
&getMessageHook,
|
|
g_hinstance,
|
|
0);
|
|
}
|
|
|
|
return (g_getMessage != NULL) ? 1 : 0;
|
|
}
|
|
|
|
int
|
|
uninstallScreenSaver(void)
|
|
{
|
|
assert(g_hinstance != NULL);
|
|
|
|
// uninstall hook unless the mouse wheel hook is installed
|
|
if (g_getMessage != NULL && g_wheelSupport != kWheelOld) {
|
|
UnhookWindowsHookEx(g_getMessage);
|
|
g_getMessage = NULL;
|
|
}
|
|
|
|
// screen saver hook is no longer installed
|
|
g_screenSaver = false;
|
|
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
setSides(UInt32 sides)
|
|
{
|
|
g_zoneSides = sides;
|
|
}
|
|
|
|
void
|
|
setZone(SInt32 x, SInt32 y, SInt32 w, SInt32 h, SInt32 jumpZoneSize)
|
|
{
|
|
g_zoneSize = jumpZoneSize;
|
|
g_xScreen = x;
|
|
g_yScreen = y;
|
|
g_wScreen = w;
|
|
g_hScreen = h;
|
|
}
|
|
|
|
void
|
|
setMode(EHookMode mode)
|
|
{
|
|
if (mode == g_mode) {
|
|
// no change
|
|
return;
|
|
}
|
|
g_mode = mode;
|
|
}
|
|
|
|
}
|