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/*

Copyright (C) 1996-1997 Id Software, Inc.

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.

*/

// in_sun.c -- SUN/X mouse input handler

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include "quakedef.h"

//

// typedefs and defines

//

#define MOUSE_SCALE		4

//

// externs

//

extern Display			*x_disp;

extern int				x_screen, x_screen_width, x_screen_height;

extern int			x_center_height, x_center_width;

extern int				x_std_event_mask;

extern Window			x_win, x_root_win;

extern qboolean			x_fullscreen;

extern qboolean			x_focus;

extern int			global_dx, global_dy;

//

// globals

//

cvar_t					_windowed_mouse = {"_windowed_mouse","1", true};

int					x_root, y_root;

int					x_root_old, y_root_old;

//

// locals

//

static int				x_mouse_num, x_mouse_denom, x_mouse_thresh;

static qboolean x_grabbed = false;

//

// IN_CenterMouse - center the mouse in the screen

//

void IN_CenterMouse( void )

{

	CheckMouseState();

	if (!x_grabbed)

		return;

	XSelectInput( x_disp, x_win, x_std_event_mask & ~PointerMotionMask );

	XWarpPointer( x_disp, None, x_root_win, 0, 0, 0, 0, x_center_width,

		      x_center_height );

	XSelectInput( x_disp, x_win, x_std_event_mask );

}

//

// Check to see if we have grabbed the mouse or not and deal with it

// appropriately

//

static void CheckMouseState(void)

{

	if (x_focus && _windowed_mouse.value && !x_grabbed) {

		x_grabbed = true;

		printf("fooling with mouse!\n");

		if (XGetPointerControl( x_disp, &x_mouse_num, &x_mouse_denom, &x_mouse_thresh ))

			printf( "XGetPointerControl failed!\n" );

		//printf( "mouse %d/%d thresh %d\n", x_mouse_num, x_mouse_denom, x_mouse_thresh );

		// make input rawer

		XAutoRepeatOff(x_disp);

		XGrabKeyboard(x_disp, x_win, True, GrabModeAsync, GrabModeAsync, CurrentTime);

		XGrabPointer(x_disp, x_win, True,

			     PointerMotionMask | ButtonPressMask | ButtonReleaseMask,

			     GrabModeAsync, GrabModeAsync, None, None, CurrentTime);

//		if (XChangePointerControl( x_disp, True, True, 1, MOUSE_SCALE, x_mouse_thresh ))

//			printf( "XChangePointerControl failed!\n" );

		IN_CenterMouse();

		// safe initial values

		x_root = x_root_old = vid.width >> 1;

		y_root = y_root_old = vid.height >> 1;

	} else if (x_grabbed && (!_windowed_mouse.value || !x_focus)) {

		printf("fooling with mouse!\n");

		x_grabbed = false;

		// undo mouse warp

		if (XChangePointerControl( x_disp, True, True, x_mouse_num, x_mouse_denom, x_mouse_thresh ))

			printf( "XChangePointerControl failed!\n" );

		XUngrabPointer( x_disp, CurrentTime );

		XUngrabKeyboard( x_disp, CurrentTime );

		XAutoRepeatOn( x_disp );

	}

}

//

// IN_Init - setup mouse input

//

void IN_Init (void)

{

    if (!x_disp) Sys_Error( "X display not open!\n" );

    Cvar_RegisterVariable (&_windowed_mouse);

	// we really really want to clean these up...

    atexit( IN_Shutdown );

}

//

// IN_Shutdown - clean up mouse settings (must be done from signal handler too!)

//

void IN_Shutdown (void)

{

    if (!x_disp) return;

	// undo mouse warp

	if (XChangePointerControl( x_disp, True, True, x_mouse_num, x_mouse_denom, x_mouse_thresh ))

		printf( "XChangePointerControl failed!\n" );

	XUngrabPointer( x_disp, CurrentTime );

	XUngrabKeyboard( x_disp, CurrentTime );

	XAutoRepeatOn( x_disp );

}

//

// IN_Commands - process buttons

//

void IN_Commands (void)

{

	// done in X event handler

}

//

// IN_Move - process mouse moves

//

void

IN_Move (usercmd_t *cmd)

{

	static int last_dx, last_dy;

	static long long last_movement;

	long long now, gethrtime();

	int dx, dy;

	CheckMouseState();

	if (!x_grabbed)

		return; // no mouse movement

	now = gethrtime();

	dx = global_dx;

	global_dx = 0;

	dy = global_dy;

	global_dy = 0;

//	printf("GOT: dx %d dy %d\n", dx, dy);

	dx *= sensitivity.value;

	dy *= sensitivity.value;

//

//	implement low pass filter to smooth motion a bit

//

	if (now - last_movement > 100000000) {

		dx = .6 * dx;

		dy = .6 * dy;

	}

	last_movement = now;

	dx = .6 * dx + .4 * last_dx;

	dy = .6 * dy + .4 * last_dy;

	last_dx = dx;

	last_dy = dy;

	if (!dx && !dy) {

		if (in_mlook.state & 1)

			V_StopPitchDrift ();

		return;

	}

	// add mouse X/Y movement to cmd

	if ((in_strafe.state & 1) || (lookstrafe.value && (in_mlook.state & 1)))

		cmd->sidemove += m_side.value * dx;

	else

		cl.viewangles[YAW] -= m_yaw.value * dx;

	if (in_mlook.state & 1)

		V_StopPitchDrift ();

	if ((in_mlook.state & 1) && !(in_strafe.state & 1)) {

		cl.viewangles[PITCH] += m_pitch.value * dy;

		if (cl.viewangles[PITCH] > 80) cl.viewangles[PITCH] = 80;

		if (cl.viewangles[PITCH] < -70) cl.viewangles[PITCH] = -70;

	}

	else {

		if ((in_strafe.state & 1) && noclip_anglehack) cmd->upmove -= m_forward.value * dy;

		else cmd->forwardmove -= m_forward.value * dy;

	}

}