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#include "LibInputHandler.h"
#include <libinput.h>
#include <fcntl.h>
#include <unistd.h>
#include <poll.h>
#include "log.hpp"
#include "backend.h"
#include "wlserver.hpp"
#include "Utils/Defer.h"
// Handles libinput in contexts where we don't have a session
// and can't use the wlroots libinput stuff.
//
// eg. in VR where we want global access to the m + kb
// without doing any seat dance.
//
// That may change in the future...
// but for now, this solves that problem.
namespace gamescope
{
static LogScope log_input_stealer( "InputStealer" );
const libinput_interface CLibInputHandler::s_LibInputInterface =
{
.open_restricted = []( const char *pszPath, int nFlags, void *pUserData ) -> int
{
return open( pszPath, nFlags );
},
.close_restricted = []( int nFd, void *pUserData ) -> void
{
close( nFd );
},
};
CLibInputHandler::CLibInputHandler()
{
}
CLibInputHandler::~CLibInputHandler()
{
if ( m_pLibInput )
{
libinput_unref( m_pLibInput );
m_pLibInput = nullptr;
}
if ( m_pUdev )
{
udev_unref( m_pUdev );
m_pUdev = nullptr;
}
}
bool CLibInputHandler::Init()
{
m_pUdev = udev_new();
if ( !m_pUdev )
{
log_input_stealer.errorf( "Failed to create udev interface" );
return false;
}
m_pLibInput = libinput_udev_create_context( &s_LibInputInterface, nullptr, m_pUdev );
if ( !m_pLibInput )
{
log_input_stealer.errorf( "Failed to create libinput context" );
return false;
}
const char *pszSeatName = "seat0";
if ( libinput_udev_assign_seat( m_pLibInput, pszSeatName ) == -1 )
{
log_input_stealer.errorf( "Could not assign seat \"%s\"", pszSeatName );
return false;
}
return true;
}
int CLibInputHandler::GetFD()
{
if ( !m_pLibInput )
return -1;
return libinput_get_fd( m_pLibInput );
}
void CLibInputHandler::OnPollIn()
{
static uint32_t s_uSequence = 0;
libinput_dispatch( m_pLibInput );
while ( libinput_event *pEvent = libinput_get_event( m_pLibInput ) )
{
defer( libinput_event_destroy( pEvent ) );
libinput_event_type eEventType = libinput_event_get_type( pEvent );
switch ( eEventType )
{
case LIBINPUT_EVENT_POINTER_MOTION:
{
libinput_event_pointer *pPointerEvent = libinput_event_get_pointer_event( pEvent );
double flDx = libinput_event_pointer_get_dx( pPointerEvent );
double flDy = libinput_event_pointer_get_dy( pPointerEvent );
GetBackend()->NotifyPhysicalInput( InputType::Mouse );
wlserver_lock();
wlserver_mousemotion( flDx, flDy, ++s_uSequence );
wlserver_unlock();
}
break;
case LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE:
{
libinput_event_pointer *pPointerEvent = libinput_event_get_pointer_event( pEvent );
double flX = libinput_event_pointer_get_absolute_x( pPointerEvent );
double flY = libinput_event_pointer_get_absolute_y( pPointerEvent );
GetBackend()->NotifyPhysicalInput( InputType::Mouse );
wlserver_lock();
wlserver_mousewarp( flX, flY, ++s_uSequence, true );
wlserver_unlock();
}
break;
case LIBINPUT_EVENT_POINTER_BUTTON:
{
libinput_event_pointer *pPointerEvent = libinput_event_get_pointer_event( pEvent );
uint32_t uButton = libinput_event_pointer_get_button( pPointerEvent );
libinput_button_state eButtonState = libinput_event_pointer_get_button_state( pPointerEvent );
wlserver_lock();
wlserver_mousebutton( uButton, eButtonState == LIBINPUT_BUTTON_STATE_PRESSED, ++s_uSequence );
wlserver_unlock();
}
break;
case LIBINPUT_EVENT_POINTER_SCROLL_WHEEL:
{
libinput_event_pointer *pPointerEvent = libinput_event_get_pointer_event( pEvent );
static constexpr libinput_pointer_axis eAxes[] =
{
LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL,
LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL,
};
for ( uint32_t i = 0; i < std::size( eAxes ); i++ )
{
libinput_pointer_axis eAxis = eAxes[i];
if ( !libinput_event_pointer_has_axis( pPointerEvent, eAxis ) )
continue;
double flScroll = libinput_event_pointer_get_scroll_value_v120( pPointerEvent, eAxis );
m_flScrollAccum[i] += flScroll / 120.0;
}
}
break;
case LIBINPUT_EVENT_KEYBOARD_KEY:
{
libinput_event_keyboard *pKeyboardEvent = libinput_event_get_keyboard_event( pEvent );
uint32_t uKey = libinput_event_keyboard_get_key( pKeyboardEvent );
libinput_key_state eState = libinput_event_keyboard_get_key_state( pKeyboardEvent );
wlserver_lock();
wlserver_key( uKey, eState == LIBINPUT_KEY_STATE_PRESSED, ++ s_uSequence );
wlserver_unlock();
}
break;
default:
break;
}
}
// Handle scrolling
{
double flScrollX = m_flScrollAccum[0];
double flScrollY = m_flScrollAccum[1];
m_flScrollAccum[0] = 0.0;
m_flScrollAccum[1] = 0.0;
if ( flScrollX != 0.0 || flScrollY != 0.0 )
{
wlserver_lock();
wlserver_mousewheel( flScrollX, flScrollY, ++s_uSequence );
wlserver_unlock();
}
}
}
}
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