mirror of
https://github.com/gnif/LookingGlass.git
synced 2024-11-10 08:38:20 +00:00
a46a3a2668
This makes it a compile-time error to call a function that semantically takes no parameters with a nonzero number of arguments. Previously, such code would still compile, but risk blowing up the stack if a compiler chose to use something other than caller-cleanup calling conventions.
105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
/*
|
|
Looking Glass - KVM FrameRelay (KVMFR) Client
|
|
Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
|
|
https://looking-glass.hostfission.com
|
|
|
|
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., 59 Temple
|
|
Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include "windows/mousehook.h"
|
|
#include "common/windebug.h"
|
|
#include "platform.h"
|
|
|
|
#include <windows.h>
|
|
#include <stdbool.h>
|
|
|
|
struct mouseHook
|
|
{
|
|
bool installed;
|
|
HHOOK hook;
|
|
MouseHookFn callback;
|
|
int x, y;
|
|
};
|
|
|
|
static struct mouseHook mouseHook = { 0 };
|
|
|
|
// forwards
|
|
static LRESULT WINAPI mouseHook_hook(int nCode, WPARAM wParam, LPARAM lParam);
|
|
static LRESULT msg_callback(WPARAM wParam, LPARAM lParam);
|
|
|
|
void mouseHook_install(MouseHookFn callback)
|
|
{
|
|
struct MSG_CALL_FUNCTION cf;
|
|
cf.fn = msg_callback;
|
|
cf.wParam = 1;
|
|
cf.lParam = (LPARAM)callback;
|
|
sendAppMessage(WM_CALL_FUNCTION, 0, (LPARAM)&cf);
|
|
}
|
|
|
|
void mouseHook_remove(void)
|
|
{
|
|
struct MSG_CALL_FUNCTION cf;
|
|
cf.fn = msg_callback;
|
|
cf.wParam = 0;
|
|
cf.lParam = 0;
|
|
sendAppMessage(WM_CALL_FUNCTION, 0, (LPARAM)&cf);
|
|
}
|
|
|
|
static LRESULT msg_callback(WPARAM wParam, LPARAM lParam)
|
|
{
|
|
if (wParam)
|
|
{
|
|
if (mouseHook.installed)
|
|
{
|
|
DEBUG_WARN("Mouse hook already installed");
|
|
return 0;
|
|
}
|
|
|
|
mouseHook.hook = SetWindowsHookEx(WH_MOUSE_LL, mouseHook_hook, NULL, 0);
|
|
if (!mouseHook.hook)
|
|
{
|
|
DEBUG_WINERROR("Failed to install the mouse hook", GetLastError());
|
|
return 0;
|
|
}
|
|
|
|
mouseHook.installed = true;
|
|
mouseHook.callback = (MouseHookFn)lParam;
|
|
}
|
|
else
|
|
{
|
|
if (!mouseHook.installed)
|
|
return 0;
|
|
|
|
UnhookWindowsHookEx(mouseHook.hook);
|
|
mouseHook.installed = false;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static LRESULT WINAPI mouseHook_hook(int nCode, WPARAM wParam, LPARAM lParam)
|
|
{
|
|
if (nCode == HC_ACTION && wParam == WM_MOUSEMOVE)
|
|
{
|
|
MSLLHOOKSTRUCT *msg = (MSLLHOOKSTRUCT *)lParam;
|
|
if (mouseHook.x != msg->pt.x || mouseHook.y != msg->pt.y)
|
|
{
|
|
mouseHook.x = msg->pt.x;
|
|
mouseHook.y = msg->pt.y;
|
|
mouseHook.callback(msg->pt.x, msg->pt.y);
|
|
}
|
|
}
|
|
return CallNextHookEx(mouseHook.hook, nCode, wParam, lParam);
|
|
}
|