// SONIC ROBO BLAST 2
//-----------------------------------------------------------------------------
// Copyright (C) 1998-2000 by DooM Legacy Team.
// Copyright (C) 1999-2018 by Sonic Team Junior.
//
// This program is free software distributed under the
// terms of the GNU General Public License, version 2.
// See the 'LICENSE' file for more details.
//-----------------------------------------------------------------------------
/// \file  console.c
/// \brief Console drawing and input

#ifdef __GNUC__
#include <unistd.h>
#endif

#include "doomdef.h"
#include "console.h"
#include "g_game.h"
#include "g_input.h"
#include "hu_stuff.h"
#include "keys.h"
#include "r_defs.h"
#include "sounds.h"
#include "st_stuff.h"
#include "s_sound.h"
#include "v_video.h"
#include "i_video.h"
#include "z_zone.h"
#include "i_system.h"
#include "d_main.h"
#include "m_menu.h"
#include "filesrch.h"

#ifdef _WINDOWS
#include "win32/win_main.h"
#endif

#ifdef HWRENDER
#include "hardware/hw_main.h"
#endif

#define MAXHUDLINES 20

static boolean con_started = false; // console has been initialised
       boolean con_startup = false; // true at game startup, screen need refreshing
static boolean con_forcepic = true; // at startup toggle console translucency when first off
       boolean con_recalc;          // set true when screen size has changed

static tic_t con_tick; // console ticker for anim or blinking prompt cursor
                        // con_scrollup should use time (currenttime - lasttime)..

static boolean consoletoggle; // true when console key pushed, ticker will handle
static boolean consoleready;  // console prompt is ready

       INT32 con_destlines; // vid lines used by console at final position
static INT32 con_curlines;  // vid lines currently used by console

       INT32 con_clipviewtop; // (useless)

static INT32 con_hudlines;        // number of console heads up message lines
static INT32 con_hudtime[MAXHUDLINES];      // remaining time of display for hud msg lines

       INT32 con_clearlines;      // top screen lines to refresh when view reduced
       boolean con_hudupdate;   // when messages scroll, we need a backgrnd refresh

// console text output
static char *con_line;          // console text output current line
static size_t con_cx;           // cursor position in current line
static size_t con_cy;           // cursor line number in con_buffer, is always
                                // increasing, and wrapped around in the text
                                // buffer using modulo.

static size_t con_totallines;      // lines of console text into the console buffer
static size_t con_width;           // columns of chars, depend on vid mode width

static size_t con_scrollup;        // how many rows of text to scroll up (pgup/pgdn)
UINT32 con_scalefactor;            // text size scale factor

// hold 32 last lines of input for history
#define CON_MAXPROMPTCHARS 256
#define CON_PROMPTCHAR '$'

static char inputlines[32][CON_MAXPROMPTCHARS]; // hold last 32 prompt lines

static INT32 inputline;    // current input line number
static INT32 inputhist;    // line number of history input line to restore
static size_t input_cur; // position of cursor in line
static size_t input_sel; // position of selection marker (I.E.: anything between this and input_cur is "selected")
static size_t input_len; // length of current line, used to bound cursor and such
// notice: input does NOT include the "$" at the start of the line. - 11/3/16

// protos.
static void CON_InputInit(void);
static void CON_RecalcSize(void);
static void CON_ChangeHeight(void);

static void CONS_hudlines_Change(void);
static void CONS_backcolor_Change(void);

//======================================================================
//                   CONSOLE VARS AND COMMANDS
//======================================================================
#ifdef macintosh
#define CON_BUFFERSIZE 4096 // my compiler can't handle local vars >32k
#else
#define CON_BUFFERSIZE 16384
#endif

static char con_buffer[CON_BUFFERSIZE];

// how many seconds the hud messages lasts on the screen
static consvar_t cons_msgtimeout = {"con_hudtime", "5", CV_SAVE, CV_Unsigned, NULL, 0, NULL, NULL, 0, 0, NULL};

// number of lines displayed on the HUD
static consvar_t cons_hudlines = {"con_hudlines", "5", CV_CALL|CV_SAVE, CV_Unsigned, CONS_hudlines_Change, 0, NULL, NULL, 0, 0, NULL};

// number of lines console move per frame
// (con_speed needs a limit, apparently)
static CV_PossibleValue_t speed_cons_t[] = {{0, "MIN"}, {64, "MAX"}, {0, NULL}};
static consvar_t cons_speed = {"con_speed", "8", CV_SAVE, speed_cons_t, NULL, 0, NULL, NULL, 0, 0, NULL};

// percentage of screen height to use for console
static consvar_t cons_height = {"con_height", "50", CV_SAVE, CV_Unsigned, NULL, 0, NULL, NULL, 0, 0, NULL};

static CV_PossibleValue_t backpic_cons_t[] = {{0, "translucent"}, {1, "picture"}, {0, NULL}};
// whether to use console background picture, or translucent mode
static consvar_t cons_backpic = {"con_backpic", "translucent", CV_SAVE, backpic_cons_t, NULL, 0, NULL, NULL, 0, 0, NULL};

static CV_PossibleValue_t backcolor_cons_t[] = {{0, "White"}, 		{1, "Black"},		{2, "Sepia"},
												{3, "Brown"},		{4, "Pink"},		{5, "Raspberry"},
												{6, "Red"},			{7, "Creamsicle"},	{8, "Orange"},
												{9, "Gold"},		{10,"Yellow"},		{11,"Emerald"},
												{12,"Green"},		{13,"Cyan"},		{14,"Steel"},
												{15,"Periwinkle"},	{16,"Blue"},		{17,"Purple"},
												{18,"Lavender"},
												{0, NULL}};


consvar_t cons_backcolor = {"con_backcolor", "Green", CV_CALL|CV_SAVE, backcolor_cons_t, CONS_backcolor_Change, 0, NULL, NULL, 0, 0, NULL};

static void CON_Print(char *msg);

//
//
static void CONS_hudlines_Change(void)
{
	INT32 i;

	// Clear the currently displayed lines
	for (i = 0; i < con_hudlines; i++)
		con_hudtime[i] = 0;

	if (cons_hudlines.value < 1)
		cons_hudlines.value = 1;
	else if (cons_hudlines.value > MAXHUDLINES)
		cons_hudlines.value = MAXHUDLINES;

	con_hudlines = cons_hudlines.value;

	CONS_Printf(M_GetText("Number of console HUD lines is now %d\n"), con_hudlines);
}

// Clear console text buffer
//
static void CONS_Clear_f(void)
{
	memset(con_buffer, 0, CON_BUFFERSIZE);

	con_cx = 0;
	con_cy = con_totallines-1;
	con_line = &con_buffer[con_cy*con_width];
	con_scrollup = 0;
}

// Choose english keymap
//
/*static void CONS_English_f(void)
{
	shiftxform = english_shiftxform;
	CONS_Printf(M_GetText("%s keymap.\n"), M_GetText("English"));
}*/

static char *bindtable[NUMINPUTS];

static void CONS_Bind_f(void)
{
	size_t na;
	INT32 key;

	na = COM_Argc();

	if (na != 2 && na != 3)
	{
		CONS_Printf(M_GetText("bind <keyname> [<command>]: create shortcut keys to command(s)\n"));
		CONS_Printf("\x82%s", M_GetText("Bind table :\n"));
		na = 0;
		for (key = 0; key < NUMINPUTS; key++)
			if (bindtable[key])
			{
				CONS_Printf("%s : \"%s\"\n", G_KeynumToString(key), bindtable[key]);
				na = 1;
			}
		if (!na)
			CONS_Printf(M_GetText("(empty)\n"));
		return;
	}

	key = G_KeyStringtoNum(COM_Argv(1));
	if (key <= 0 || key >= NUMINPUTS)
	{
		CONS_Alert(CONS_NOTICE, M_GetText("Invalid key name\n"));
		return;
	}

	Z_Free(bindtable[key]);
	bindtable[key] = NULL;

	if (na == 3)
		bindtable[key] = Z_StrDup(COM_Argv(2));
}

//======================================================================
//                          CONSOLE SETUP
//======================================================================

// Font colormap colors
// TODO: This could probably be improved somehow...
// These colormaps are 99% identical, with just a few changed bytes
// This could EASILY be handled by modifying a centralised colormap
// for software depending on the prior state - but yknow, OpenGL...
UINT8 *yellowmap, *magentamap, *lgreenmap, *bluemap, *graymap, *redmap, *orangemap, *skymap, *purplemap, *aquamap, *peridotmap, *azuremap, *brownmap, *rosymap, *invertmap;

// Console BG color
UINT8 *consolebgmap = NULL;
UINT8 *promptbgmap = NULL;
static UINT8 promptbgcolor = UINT8_MAX;

void CON_SetupBackColormapEx(INT32 color, boolean prompt)
{
	UINT16 i, palsum;
	UINT8 j, palindex;
	UINT8 *pal = W_CacheLumpName(GetPalette(), PU_CACHE);
	INT32 shift = 6;

	if (color == INT32_MAX)
		color = cons_backcolor.value;

	shift = 6; // 12 colors -- shift of 7 means 6 colors

	switch (color)
	{
		case 0:		palindex = 15; 	break; 	// White
		case 1:		palindex = 31;	break; 	// Black
		case 2:		palindex = 251;	break;	// Sepia
		case 3:		palindex = 239;	break; 	// Brown
		case 4:		palindex = 215; shift = 7; 	break; 	// Pink
		case 5:		palindex = 37; shift = 7;	break; 	// Raspberry
		case 6:		palindex = 47; shift = 7;	break; 	// Red
		case 7:		palindex = 53;	shift = 7;	break;	// Creamsicle
		case 8:		palindex = 63;	break; 	// Orange
		case 9:		palindex = 56; shift = 7;	break; 	// Gold
		case 10:	palindex = 79; shift = 7;	break; 	// Yellow
		case 11:	palindex = 119; shift = 7; 	break; 	// Emerald
		case 12:	palindex = 111;	break; 	// Green
		case 13:	palindex = 136;	shift = 7; break; 	// Cyan
		case 14:	palindex = 175; shift = 7;	break; 	// Steel
		case 15:	palindex = 166;	shift = 7; 	break; 	// Periwinkle
		case 16:	palindex = 159;	break; 	// Blue
		case 17:	palindex = 187; shift = 7; 	break; 	// Purple
		case 18:	palindex = 199; shift = 7; 	break; 	// Lavender
		// Default green
		default:	palindex = 111; break;
	}

	if (prompt)
	{
		if (!promptbgmap)
			promptbgmap = (UINT8 *)Z_Malloc(256, PU_STATIC, NULL);

		if (color == promptbgcolor)
			return;
		else
			promptbgcolor = color;
	}
	else if (!consolebgmap)
		consolebgmap = (UINT8 *)Z_Malloc(256, PU_STATIC, NULL);

	// setup background colormap
	for (i = 0, j = 0; i < 768; i += 3, j++)
	{
		palsum = (pal[i] + pal[i+1] + pal[i+2]) >> shift;
		if (prompt)
			promptbgmap[j] = (UINT8)(palindex - palsum);
		else
			consolebgmap[j] = (UINT8)(palindex - palsum);
	}
}

void CON_SetupBackColormap(void)
{
	CON_SetupBackColormapEx(cons_backcolor.value, false);
	CON_SetupBackColormapEx(1, true); // default to gray
}

static void CONS_backcolor_Change(void)
{
	CON_SetupBackColormapEx(cons_backcolor.value, false);
}

static void CON_SetupColormaps(void)
{
	INT32 i;
	UINT8 *memorysrc = (UINT8 *)Z_Malloc((256*15), PU_STATIC, NULL);

	magentamap = memorysrc;
	yellowmap  = (magentamap+256);
	lgreenmap  = (yellowmap+256);
	bluemap    = (lgreenmap+256);
	redmap     = (bluemap+256);
	graymap    = (redmap+256);
	orangemap  = (graymap+256);
	skymap     = (orangemap+256);
	purplemap  = (skymap+256);
	aquamap    = (purplemap+256);
	peridotmap = (aquamap+256);
	azuremap   = (peridotmap+256);
	brownmap   = (azuremap+256);
	rosymap    = (brownmap+256);
	invertmap  = (rosymap+256);

	// setup the other colormaps, for console text

	// these don't need to be aligned, unless you convert the
	// V_DrawMappedPatch() into optimised asm.

	for (i = 0; i < (256*15); i++, ++memorysrc)
		*memorysrc = (UINT8)(i & 0xFF); // remap each color to itself...

#define colset(map, a, b, c) \
	map[1] = (UINT8)a;\
	map[3] = (UINT8)b;\
	map[9] = (UINT8)c

	colset(magentamap, 177, 178, 184);
	colset(yellowmap,   82,  73,  66);
	colset(lgreenmap,   97,  98, 106);
	colset(bluemap,    146, 147, 155);
	colset(redmap,     210,  32,  39);
	colset(graymap,      6,  8,   14);
	colset(orangemap,   51,  52,  57);
	colset(skymap,     129, 130, 133);
	colset(purplemap,  160, 161, 163);
	colset(aquamap,    120, 121, 123);
	colset(peridotmap,  88, 188, 190);
	colset(azuremap,   144, 145, 170);
	colset(brownmap,   219, 221, 224);
	colset(rosymap,    200, 201, 203);
	colset(invertmap,   27,  26,  22);
	invertmap[26] = (UINT8)3;

#undef colset

	// Init back colormap
	CON_SetupBackColormap();
}

// Setup the console text buffer
//
void CON_Init(void)
{
	INT32 i;

	for (i = 0; i < NUMINPUTS; i++)
		bindtable[i] = NULL;

	// clear all lines
	memset(con_buffer, 0, CON_BUFFERSIZE);

	// make sure it is ready for the loading screen
	con_width = 0;
	CON_RecalcSize();

	CON_SetupColormaps();

	//note: CON_Ticker should always execute at least once before D_Display()
	con_clipviewtop = -1; // -1 does not clip

	con_hudlines = atoi(cons_hudlines.defaultvalue);

	// setup console input filtering
	CON_InputInit();

	// register our commands
	//
	COM_AddCommand("cls", CONS_Clear_f);
	//COM_AddCommand("english", CONS_English_f);
	// set console full screen for game startup MAKE SURE VID_Init() done !!!
	con_destlines = vid.height;
	con_curlines = vid.height;


	if (!dedicated)
	{
		con_started = true;
		con_startup = true; // need explicit screen refresh until we are in Doom loop
		consoletoggle = false;
		CV_RegisterVar(&cons_msgtimeout);
		CV_RegisterVar(&cons_hudlines);
		CV_RegisterVar(&cons_speed);
		CV_RegisterVar(&cons_height);
		CV_RegisterVar(&cons_backpic);
		CV_RegisterVar(&cons_backcolor);
		COM_AddCommand("bind", CONS_Bind_f);
	}
	else
	{
		con_started = true;
		con_startup = false; // need explicit screen refresh until we are in Doom loop
		consoletoggle = true;
	}
}
// Console input initialization
//
static void CON_InputInit(void)
{
	// prepare the first prompt line
	memset(inputlines, 0, sizeof (inputlines));
	inputline = 0;
	input_cur = input_sel = input_len = 0;
}

//======================================================================
//                        CONSOLE EXECUTION
//======================================================================

// Called at screen size change to set the rows and line size of the
// console text buffer.
//
static void CON_RecalcSize(void)
{
	size_t conw, oldcon_width, oldnumlines, i, oldcon_cy;
	char *tmp_buffer;
	char *string;

	switch (cv_constextsize.value)
	{
	case V_NOSCALEPATCH:
		con_scalefactor = 1;
		break;
	case V_SMALLSCALEPATCH:
		con_scalefactor = vid.smalldupx;
		break;
	case V_MEDSCALEPATCH:
		con_scalefactor = vid.meddupx;
		break;
	default:	// Full scaling
		con_scalefactor = vid.dupx;
		break;
	}

	con_recalc = false;

	if (dedicated)
		conw = 1;
	else
		conw = (vid.width>>3) / con_scalefactor - 2;

	if (con_curlines == vid.height) // first init
	{
		con_curlines = vid.height;
		con_destlines = vid.height;
	}

	if (con_destlines > 0) // Resize console if already open
	{
		CON_ChangeHeight();
		con_curlines = con_destlines;
	}

	// check for change of video width
	if (conw == con_width)
		return; // didn't change

	tmp_buffer = Z_Malloc(CON_BUFFERSIZE, PU_STATIC, NULL);
	string = Z_Malloc(CON_BUFFERSIZE, PU_STATIC, NULL); // BP: it is a line but who know

	oldcon_width = con_width;
	oldnumlines = con_totallines;
	oldcon_cy = con_cy;
	M_Memcpy(tmp_buffer, con_buffer, CON_BUFFERSIZE);

	if (conw < 1)
		con_width = (BASEVIDWIDTH>>3) - 2;
	else
		con_width = conw;

	con_width += 11; // Graue 06-19-2004 up to 11 control chars per line

	con_totallines = CON_BUFFERSIZE / con_width;
	memset(con_buffer, ' ', CON_BUFFERSIZE);

	con_cx = 0;
	con_cy = con_totallines-1;
	con_line = &con_buffer[con_cy*con_width];
	con_scrollup = 0;

	// re-arrange console text buffer to keep text
	if (oldcon_width) // not the first time
	{
		for (i = oldcon_cy + 1; i < oldcon_cy + oldnumlines; i++)
		{
			if (tmp_buffer[(i%oldnumlines)*oldcon_width])
			{
				M_Memcpy(string, &tmp_buffer[(i%oldnumlines)*oldcon_width], oldcon_width);
				conw = oldcon_width - 1;
				while (string[conw] == ' ' && conw)
					conw--;
				string[conw+1] = '\n';
				string[conw+2] = '\0';
				CON_Print(string);
			}
		}
	}

	Z_Free(string);
	Z_Free(tmp_buffer);
}

static void CON_ChangeHeight(void)
{
	INT32 minheight = 20 * con_scalefactor;	// 20 = 8+8+4

	// toggle console in
	con_destlines = (cons_height.value*vid.height)/100;
	if (con_destlines < minheight)
		con_destlines = minheight;
	else if (con_destlines > vid.height)
		con_destlines = vid.height;

	con_destlines &= ~0x3; // multiple of text row height
}

// Handles Console moves in/out of screen (per frame)
//
static void CON_MoveConsole(void)
{
	const fixed_t conspeed = FixedDiv(cons_speed.value*vid.fdupy, FRACUNIT);

	// instant
	if (!cons_speed.value)
	{
		con_curlines = con_destlines;
		return;
	}

	// up/down move to dest
	if (con_curlines < con_destlines)
	{
		con_curlines += FixedInt(conspeed);
		if (con_curlines > con_destlines)
			con_curlines = con_destlines;
	}
	else if (con_curlines > con_destlines)
	{
		con_curlines -= FixedInt(conspeed);
		if (con_curlines < con_destlines)
			con_curlines = con_destlines;
	}
}

// Clear time of console heads up messages
//
void CON_ClearHUD(void)
{
	INT32 i;

	for (i = 0; i < con_hudlines; i++)
		con_hudtime[i] = 0;
}

// Force console to move out immediately
// note: con_ticker will set consoleready false
void CON_ToggleOff(void)
{
	if (!con_destlines)
		return;

	con_destlines = 0;
	con_curlines = 0;
	CON_ClearHUD();
	con_forcepic = 0;
	con_clipviewtop = -1; // remove console clipping of view
}

boolean CON_Ready(void)
{
	return consoleready;
}

// Console ticker: handles console move in/out, cursor blinking
//
void CON_Ticker(void)
{
	INT32 i;
	INT32 minheight = 20 * con_scalefactor;	// 20 = 8+8+4

	// cursor blinking
	con_tick++;
	con_tick &= 7;

	// if the menu is open then close the console.
	if (menuactive && con_destlines)
	{
		consoletoggle = false;
		con_destlines = 0;
		CON_ClearHUD();
	}

	// console key was pushed
	if (consoletoggle)
	{
		consoletoggle = false;

		// toggle off console
		if (con_destlines > 0)
		{
			con_destlines = 0;
			CON_ClearHUD();
		}
		else
			CON_ChangeHeight();
	}

	// console movement
	if (con_destlines != con_curlines)
		CON_MoveConsole();

	// clip the view, so that the part under the console is not drawn
	con_clipviewtop = -1;
	if (cons_backpic.value) // clip only when using an opaque background
	{
		if (con_curlines > 0)
			con_clipviewtop = con_curlines - viewwindowy - 1 - 10;
		// NOTE: BIG HACK::SUBTRACT 10, SO THAT WATER DON'T COPY LINES OF THE CONSOLE
		//       WINDOW!!! (draw some more lines behind the bottom of the console)
		if (con_clipviewtop < 0)
			con_clipviewtop = -1; // maybe not necessary, provided it's < 0
	}

	// check if console ready for prompt
	if (con_destlines >= minheight)
		consoleready = true;
	else
		consoleready = false;

	// make overlay messages disappear after a while
	for (i = 0; i < con_hudlines; i++)
	{
		con_hudtime[i]--;
		if (con_hudtime[i] < 0)
			con_hudtime[i] = 0;
	}
}

//
// ----
//
// Shortcuts for adding and deleting characters, strings, and sections
// Necessary due to moving cursor
//

static void CON_InputClear(void)
{
	memset(inputlines[inputline], 0, CON_MAXPROMPTCHARS);
	input_cur = input_sel = input_len = 0;
}

static void CON_InputSetString(const char *c)
{
	memset(inputlines[inputline], 0, CON_MAXPROMPTCHARS);
	strcpy(inputlines[inputline], c);
	input_cur = input_sel = input_len = strlen(c);
}

static void CON_InputAddString(const char *c)
{
	size_t csize = strlen(c);
	if (input_len + csize > CON_MAXPROMPTCHARS-1)
		return;
	if (input_cur != input_len)
		memmove(&inputlines[inputline][input_cur+csize], &inputlines[inputline][input_cur], input_len-input_cur);
	memcpy(&inputlines[inputline][input_cur], c, csize);
	input_len += csize;
	input_sel = (input_cur += csize);
}

static void CON_InputDelSelection(void)
{
	size_t start, end, len;
	if (input_cur > input_sel)
	{
		start = input_sel;
		end = input_cur;
	}
	else
	{
		start = input_cur;
		end = input_sel;
	}
	len = (end - start);

	if (end != input_len)
		memmove(&inputlines[inputline][start], &inputlines[inputline][end], input_len-end);
	memset(&inputlines[inputline][input_len - len], 0, len);

	input_len -= len;
	input_sel = input_cur = start;
}

static void CON_InputAddChar(char c)
{
	if (input_len >= CON_MAXPROMPTCHARS-1)
		return;
	if (input_cur != input_len)
		memmove(&inputlines[inputline][input_cur+1], &inputlines[inputline][input_cur], input_len-input_cur);
	inputlines[inputline][input_cur++] = c;
	inputlines[inputline][++input_len] = 0;
	input_sel = input_cur;
}

static void CON_InputDelChar(void)
{
	if (!input_cur)
		return;
	if (input_cur != input_len)
		memmove(&inputlines[inputline][input_cur-1], &inputlines[inputline][input_cur], input_len-input_cur);
	inputlines[inputline][--input_len] = 0;
	input_sel = --input_cur;
}

//
// ----
//

// Handles console key input
//
boolean CON_Responder(event_t *ev)
{
	static UINT8 consdown = false; // console is treated differently due to rare usage

	// sequential completions a la 4dos
	static char completion[80];
	static INT32 comskips, varskips;

	const char *cmd = "";
	INT32 key;

	if (chat_on)
		return false;

	// let go keyup events, don't eat them
	if (ev->type != ev_keydown && ev->type != ev_console)
	{
		if (ev->data1 == gamecontrol[gc_console][0] || ev->data1 == gamecontrol[gc_console][1])
			consdown = false;
		return false;
	}

	key = ev->data1;

	// check for console toggle key
	if (ev->type != ev_console)
	{
		if (modeattacking || metalrecording)
			return false;

		if (key == gamecontrol[gc_console][0] || key == gamecontrol[gc_console][1])
		{
			if (consdown) // ignore repeat
				return true;
			consoletoggle = true;
			consdown = true;
			return true;
		}

		// check other keys only if console prompt is active
		if (!consoleready && key < NUMINPUTS) // metzgermeister: boundary check!!
		{
			if (bindtable[key])
			{
				COM_BufAddText(bindtable[key]);
				COM_BufAddText("\n");
				return true;
			}
			return false;
		}

		// escape key toggle off console
		if (key == KEY_ESCAPE)
		{
			consoletoggle = true;
			return true;
		}
	}

	// Always eat ctrl/shift/alt if console open, so the menu doesn't get ideas
	if (key == KEY_LSHIFT || key == KEY_RSHIFT
	 || key == KEY_LCTRL || key == KEY_RCTRL
	 || key == KEY_LALT || key == KEY_RALT)
		return true;

	// ctrl modifier -- changes behavior, adds shortcuts
	if (ctrldown)
	{
		// show all cvars/commands that match what we have inputted
		if (key == KEY_TAB)
		{
			size_t i, len;

			if (!completion[0])
			{
				if (!input_len || input_len >= 40 || strchr(inputlines[inputline], ' '))
					return true;
				strcpy(completion, inputlines[inputline]);
				comskips = varskips = 0;
			}
			len = strlen(completion);

			//first check commands
			CONS_Printf("\nCommands:\n");
			for (i = 0, cmd = COM_CompleteCommand(completion, i); cmd; cmd = COM_CompleteCommand(completion, ++i))
				CONS_Printf("  \x83" "%s" "\x80" "%s\n", completion, cmd+len);
			if (i == 0) CONS_Printf("  (none)\n");

			//now we move on to CVARs
			CONS_Printf("Variables:\n");
			for (i = 0, cmd = CV_CompleteVar(completion, i); cmd; cmd = CV_CompleteVar(completion, ++i))
				CONS_Printf("  \x83" "%s" "\x80" "%s\n", completion, cmd+len);
			if (i == 0) CONS_Printf("  (none)\n");

			return true;
		}
		// ---

		if (key == KEY_HOME) // oldest text in buffer
		{
			con_scrollup = (con_totallines-((con_curlines-16)>>3));
			return true;
		}
		else if (key == KEY_END) // most recent text in buffer
		{
			con_scrollup = 0;
			return true;
		}

		if (key == 'x' || key == 'X')
		{
			if (input_sel > input_cur)
				I_ClipboardCopy(&inputlines[inputline][input_cur], input_sel-input_cur);
			else
				I_ClipboardCopy(&inputlines[inputline][input_sel], input_cur-input_sel);
			CON_InputDelSelection();
			completion[0] = 0;
			return true;
		}
		else if (key == 'c' || key == 'C')
		{
			if (input_sel > input_cur)
				I_ClipboardCopy(&inputlines[inputline][input_cur], input_sel-input_cur);
			else
				I_ClipboardCopy(&inputlines[inputline][input_sel], input_cur-input_sel);
			return true;
		}
		else if (key == 'v' || key == 'V')
		{
			const char *paste = I_ClipboardPaste();
			if (input_sel != input_cur)
				CON_InputDelSelection();
			if (paste != NULL)
				CON_InputAddString(paste);
			completion[0] = 0;
			return true;
		}

		// Select all
		if (key == 'a' || key == 'A')
		{
			input_sel = 0;
			input_cur = input_len;
			return true;
		}

		// ...why shouldn't it eat the key? if it doesn't, it just means you
		// can control Sonic from the console, which is silly
		return true;//return false;
	}

	// command completion forward (tab) and backward (shift-tab)
	if (key == KEY_TAB)
	{
		// sequential command completion forward and backward

		// remember typing for several completions (a-la-4dos)
		if (!completion[0])
		{
			if (!input_len || input_len >= 40 || strchr(inputlines[inputline], ' '))
				return true;
			strcpy(completion, inputlines[inputline]);
			comskips = varskips = 0;
		}
		else
		{
			if (shiftdown)
			{
				if (comskips < 0)
				{
					if (--varskips < 0)
						comskips = -comskips - 2;
				}
				else if (comskips > 0) comskips--;
			}
			else
			{
				if (comskips < 0) varskips++;
				else              comskips++;
			}
		}

		if (comskips >= 0)
		{
			cmd = COM_CompleteCommand(completion, comskips);
			if (!cmd) // dirty: make sure if comskips is zero, to have a neg value
				comskips = -comskips - 1;
		}
		if (comskips < 0)
			cmd = CV_CompleteVar(completion, varskips);

		if (cmd)
			CON_InputSetString(va("%s ", cmd));
		else
		{
			if (comskips > 0)
				comskips--;
			else if (varskips > 0)
				varskips--;
		}

		return true;
	}

	// move up (backward) in console textbuffer
	if (key == KEY_PGUP)
	{
		if (con_scrollup < (con_totallines-((con_curlines-16)>>3)))
			con_scrollup++;
		return true;
	}
	else if (key == KEY_PGDN)
	{
		if (con_scrollup > 0)
			con_scrollup--;
		return true;
	}

	if (key == KEY_LEFTARROW)
	{
		if (input_cur != 0)
			--input_cur;
		if (!shiftdown)
			input_sel = input_cur;
		return true;
	}
	else if (key == KEY_RIGHTARROW)
	{
		if (input_cur < input_len)
			++input_cur;
		if (!shiftdown)
			input_sel = input_cur;
		return true;
	}
	else if (key == KEY_HOME)
	{
		input_cur = 0;
		if (!shiftdown)
			input_sel = input_cur;
		return true;
	}
	else if (key == KEY_END)
	{
		input_cur = input_len;
		if (!shiftdown)
			input_sel = input_cur;
		return true;
	}

	// At this point we're messing with input
	// Clear completion
	completion[0] = 0;

	// command enter
	if (key == KEY_ENTER)
	{
		if (!input_len)
			return true;

		// push the command
		COM_BufAddText(inputlines[inputline]);
		COM_BufAddText("\n");

		CONS_Printf("\x86""%c""\x80""%s\n", CON_PROMPTCHAR, inputlines[inputline]);

		inputline = (inputline+1) & 31;
		inputhist = inputline;
		CON_InputClear();

		return true;
	}

	// backspace and delete command prompt
	if (input_sel != input_cur)
	{
		if (key == KEY_BACKSPACE || key == KEY_DEL)
		{
			CON_InputDelSelection();
			return true;
		}
	}
	else if (key == KEY_BACKSPACE)
	{
		CON_InputDelChar();
		return true;
	}
	else if (key == KEY_DEL)
	{
		if (input_cur == input_len)
			return true;
		++input_cur;
		CON_InputDelChar();
		return true;
	}

	// move back in input history
	if (key == KEY_UPARROW)
	{
		// copy one of the previous inputlines to the current
		do
			inputhist = (inputhist - 1) & 31; // cycle back
		while (inputhist != inputline && !inputlines[inputhist][0]);

		// stop at the last history input line, which is the
		// current line + 1 because we cycle through the 32 input lines
		if (inputhist == inputline)
			inputhist = (inputline + 1) & 31;

		CON_InputSetString(inputlines[inputhist]);
		return true;
	}

	// move forward in input history
	if (key == KEY_DOWNARROW)
	{
		if (inputhist == inputline)
			return true;
		do
			inputhist = (inputhist + 1) & 31;
		while (inputhist != inputline && !inputlines[inputhist][0]);

		// back to currentline
		if (inputhist == inputline)
			CON_InputClear();
		else
			CON_InputSetString(inputlines[inputhist]);
		return true;
	}

	// allow people to use keypad in console (good for typing IP addresses) - Calum
	if (key >= KEY_KEYPAD7 && key <= KEY_KPADDEL)
	{
		char keypad_translation[] = {'7','8','9','-',
		                             '4','5','6','+',
		                             '1','2','3',
		                             '0','.'};

		key = keypad_translation[key - KEY_KEYPAD7];
	}
	else if (key == KEY_KPADSLASH)
		key = '/';

	if (key >= 'a' && key <= 'z')
	{
		if (capslock ^ shiftdown)
			key = shiftxform[key];
	}
	else if (shiftdown)
		key = shiftxform[key];

	// enter a char into the command prompt
	if (key < 32 || key > 127)
		return true;

	// add key to cmd line here
	if (key >= 'A' && key <= 'Z' && !(shiftdown ^ capslock)) //this is only really necessary for dedicated servers
		key = key + 'a' - 'A';

	if (input_sel != input_cur)
		CON_InputDelSelection();
	CON_InputAddChar(key);

	return true;
}

// Insert a new line in the console text buffer
//
static void CON_Linefeed(void)
{
	// set time for heads up messages
	con_hudtime[con_cy%con_hudlines] = cons_msgtimeout.value*TICRATE;

	con_cy++;
	con_cx = 0;

	con_line = &con_buffer[(con_cy%con_totallines)*con_width];
	memset(con_line, ' ', con_width);

	// make sure the view borders are refreshed if hud messages scroll
	con_hudupdate = true; // see HU_Erase()
}

// Outputs text into the console text buffer
static void CON_Print(char *msg)
{
	size_t l;
	INT32 controlchars = 0; // for color changing
	char color = '\x80';  // keep color across lines

	if (msg == NULL)
		return;

	if (*msg == '\3') // chat text, makes ding sound
		S_StartSound(NULL, sfx_radio);
	else if (*msg == '\4') // chat action, dings and is in yellow
	{
		*msg = '\x82'; // yellow
		S_StartSound(NULL, sfx_radio);
	}

	if (!(*msg & 0x80))
	{
		con_line[con_cx++] = '\x80';
		controlchars = 1;
	}

	while (*msg)
	{
		// skip non-printable characters and white spaces
		while (*msg && *msg <= ' ')
		{
			if (*msg & 0x80)
			{
				color = con_line[con_cx++] = *(msg++);
				controlchars++;
				continue;
			}
			else if (*msg == '\r') // carriage return
			{
				con_cy--;
				CON_Linefeed();
				color = '\x80';
				controlchars = 0;
			}
			else if (*msg == '\n') // linefeed
			{
				CON_Linefeed();
				con_line[con_cx++] = color;
				controlchars = 1;
			}
			else if (*msg == ' ') // space
			{
				con_line[con_cx++] = ' ';
				if (con_cx - controlchars >= con_width-11)
				{
					CON_Linefeed();
					con_line[con_cx++] = color;
					controlchars = 1;
				}
			}
			else if (*msg == '\t')
			{
				// adds tab spaces for nice layout in console

				do
				{
					con_line[con_cx++] = ' ';
				} while ((con_cx - controlchars) % 4 != 0);

				if (con_cx - controlchars >= con_width-11)
				{
					CON_Linefeed();
					con_line[con_cx++] = color;
					controlchars = 1;
				}
			}
			msg++;
		}

		if (*msg == '\0')
			return;

		// printable character
		for (l = 0; l < (con_width-11) && msg[l] > ' '; l++)
			;

		// word wrap
		if ((con_cx - controlchars) + l > con_width-11)
		{
			CON_Linefeed();
			con_line[con_cx++] = color;
			controlchars = 1;
		}

		// a word at a time
		for (; l > 0; l--)
			con_line[con_cx++] = *(msg++);
	}
}

void CON_LogMessage(const char *msg)
{
	char txt[8192], *t;
	const char *p = msg, *e = txt+sizeof (txt)-2;

	for (t = txt; *p != '\0'; p++)
	{
		if (*p == '\n' || *p >= ' ') // don't log or console print CON_Print's control characters
			*t++ = *p;

		if (t >= e)
		{
			*t = '\0'; //end of string
			I_OutputMsg("%s", txt); //print string
			t = txt; //reset t pointer
			memset(txt,'\0', sizeof (txt)); //reset txt
		}
	}
	*t = '\0'; //end of string
	I_OutputMsg("%s", txt);
}

// Console print! Wahooo! Lots o fun!
//

void CONS_Printf(const char *fmt, ...)
{
	va_list argptr;
	static char *txt = NULL;

	if (txt == NULL)
		txt = malloc(8192);

	va_start(argptr, fmt);
	vsprintf(txt, fmt, argptr);
	va_end(argptr);

	// echo console prints to log file
	DEBFILE(txt);

	if (!con_started)
	{
#ifdef PC_DOS
		CON_LogMessage(txt);
		free(txt);
		return;
#endif
	}
	else
		// write message in con text buffer
		CON_Print(txt);

#ifndef PC_DOS
	CON_LogMessage(txt);
#endif

	// make sure new text is visible
	con_scrollup = 0;

	// if not in display loop, force screen update
	if (con_startup)
	{
#ifdef _WINDOWS
		patch_t *con_backpic = W_CachePatchName("CONSBACK", PU_CACHE);

		// Jimita: CON_DrawBackpic just called V_DrawScaledPatch
		V_DrawScaledPatch(0, 0, 0, con_backpic);

		W_UnlockCachedPatch(con_backpic);
		I_LoadingScreen(txt);				// Win32/OS2 only
#else
		// here we display the console text
		CON_Drawer();
		I_FinishUpdate(); // page flip or blit buffer
#endif
	}
}

void CONS_Alert(alerttype_t level, const char *fmt, ...)
{
	va_list argptr;
	static char *txt = NULL;

	if (txt == NULL)
		txt = malloc(8192);

	va_start(argptr, fmt);
	vsprintf(txt, fmt, argptr);
	va_end(argptr);

	switch (level)
	{
		case CONS_NOTICE:
			// no notice for notices, hehe
			CONS_Printf("\x83" "%s" "\x80 ", M_GetText("NOTICE:"));
			break;
		case CONS_WARNING:
			refreshdirmenu |= REFRESHDIR_WARNING;
			CONS_Printf("\x82" "%s" "\x80 ", M_GetText("WARNING:"));
			break;
		case CONS_ERROR:
			refreshdirmenu |= REFRESHDIR_ERROR;
			CONS_Printf("\x85" "%s" "\x80 ", M_GetText("ERROR:"));
			break;
	}

	// I am lazy and I feel like just letting CONS_Printf take care of things.
	// Is that okay?
	CONS_Printf("%s", txt);
}

void CONS_Debug(INT32 debugflags, const char *fmt, ...)
{
	va_list argptr;
	static char *txt = NULL;

	if ((cv_debug & debugflags) != debugflags)
		return;

	if (txt == NULL)
		txt = malloc(8192);

	va_start(argptr, fmt);
	vsprintf(txt, fmt, argptr);
	va_end(argptr);

	// Again I am lazy, oh well
	CONS_Printf("%s", txt);
}


// Print an error message, and wait for ENTER key to continue.
// To make sure the user has seen the message
//
void CONS_Error(const char *msg)
{
#ifdef RPC_NO_WINDOWS_H
	if (!graphics_started)
	{
		MessageBoxA(vid.WndParent, msg, "SRB2 Warning", MB_OK);
		return;
	}
#endif
	CONS_Printf("\x82%s", msg); // write error msg in different colour
	CONS_Printf(M_GetText("Press ENTER to continue\n"));

	// dirty quick hack, but for the good cause
	while (I_GetKey() != KEY_ENTER)
		I_OsPolling();
}

//======================================================================
//                          CONSOLE DRAW
//======================================================================

// draw console prompt line
//
static void CON_DrawInput(void)
{
	INT32 charwidth = (INT32)con_scalefactor << 3;
	const char *p = inputlines[inputline];
	size_t c, clen, cend;
	UINT8 lellip = 0, rellip = 0;
	INT32 x, y, i;

	y = con_curlines - 12 * con_scalefactor;
	x = charwidth*2;

	clen = con_width-13;

	if (input_len <= clen)
	{
		c = 0;
		clen = input_len;
	}
	else // input line scrolls left if it gets too long
	{
		clen -= 2; // There will always be some extra truncation -- but where is what we'll find out

		if (input_cur <= clen/2)
		{
			// Close enough to right edge to show all
			c = 0;
			// Always will truncate right side from this position, so always draw right ellipsis
			rellip = 1;
		}
		else
		{
			// Cursor in the middle (or right side) of input
			// Move over for the ellipsis
			c = input_cur - (clen/2) + 2;
			x += charwidth*2;
			lellip = 1;

			if (c + clen >= input_len)
			{
				// Cursor in the right side of input
				// We were too far over, so move back
				c = input_len - clen;
			}
			else
			{
				// Cursor in the middle -- ellipses on both sides
				clen -= 2;
				rellip = 1;
			}
		}
	}

	if (lellip)
	{
		x -= charwidth*3;
		if (input_sel < c)
			V_DrawFill(x, y, charwidth*3, (10 * con_scalefactor), 77 | V_NOSCALESTART);
		for (i = 0; i < 3; ++i, x += charwidth)
			V_DrawCharacter(x, y, '.' | cv_constextsize.value | V_GRAYMAP | V_NOSCALESTART, true);
	}
	else
		V_DrawCharacter(x-charwidth, y, CON_PROMPTCHAR | cv_constextsize.value | V_GRAYMAP | V_NOSCALESTART, true);

	for (cend = c + clen; c < cend; ++c, x += charwidth)
	{
		if ((input_sel > c && input_cur <= c) || (input_sel <= c && input_cur > c))
		{
			V_DrawFill(x, y, charwidth, (10 * con_scalefactor), 77 | V_NOSCALESTART);
			V_DrawCharacter(x, y, p[c] | cv_constextsize.value | V_YELLOWMAP | V_NOSCALESTART, true);
		}
		else
			V_DrawCharacter(x, y, p[c] | cv_constextsize.value | V_NOSCALESTART, true);

		if (c == input_cur && con_tick >= 4)
			V_DrawCharacter(x, y + (con_scalefactor*2), '_' | cv_constextsize.value | V_NOSCALESTART, true);
	}
	if (cend == input_cur && con_tick >= 4)
		V_DrawCharacter(x, y + (con_scalefactor*2), '_' | cv_constextsize.value | V_NOSCALESTART, true);
	if (rellip)
	{
		if (input_sel > cend)
			V_DrawFill(x, y, charwidth*3, (10 * con_scalefactor), 77 | V_NOSCALESTART);
		for (i = 0; i < 3; ++i, x += charwidth)
			V_DrawCharacter(x, y, '.' | cv_constextsize.value | V_GRAYMAP | V_NOSCALESTART, true);
	}
}

// draw the last lines of console text to the top of the screen
static void CON_DrawHudlines(void)
{
	UINT8 *p;
	size_t i;
	INT32 y;
	INT32 charflags = 0;
	INT32 charwidth = 8 * con_scalefactor;
	INT32 charheight = 8 * con_scalefactor;

	if (con_hudlines <= 0)
		return;

	if (chat_on && OLDCHAT)
		y = charheight; // leave place for chat input in the first row of text (only do it if consolechat is on.)
	else
		y = 0;

	for (i = con_cy - con_hudlines+1; i <= con_cy; i++)
	{
		size_t c;
		INT32 x;

		if ((signed)i < 0)
			continue;
		if (con_hudtime[i%con_hudlines] == 0)
			continue;

		p = (UINT8 *)&con_buffer[(i%con_totallines)*con_width];

		for (c = 0, x = 0; c < con_width; c++, x += charwidth, p++)
		{
			while (*p & 0x80) // Graue 06-19-2004
			{
				charflags = (*p & 0x7f) << V_CHARCOLORSHIFT;
				p++;
			}
			if (*p < HU_FONTSTART)
				;//charwidth = 4 * con_scalefactor;
			else
			{
				//charwidth = SHORT(hu_font['A'-HU_FONTSTART]->width) * con_scalefactor;
				V_DrawCharacter(x, y, (INT32)(*p) | charflags | cv_constextsize.value | V_NOSCALESTART, true);
			}
		}

		//V_DrawCharacter(x, y, (p[c]&0xff) | cv_constextsize.value | V_NOSCALESTART, true);
		y += charheight;
	}

	// top screen lines that might need clearing when view is reduced
	con_clearlines = y; // this is handled by HU_Erase();
}

// draw the console background, text, and prompt if enough place
//
static void CON_DrawConsole(void)
{
	UINT8 *p;
	size_t i;
	INT32 y;
	INT32 charflags = 0;
	INT32 charwidth = (INT32)con_scalefactor << 3;
	INT32 charheight = charwidth;
	INT32 minheight = 20 * con_scalefactor;	// 20 = 8+8+4

	if (con_curlines <= 0)
		return;

	//FIXME: refresh borders only when console bg is translucent
	con_clearlines = con_curlines; // clear console draw from view borders
	con_hudupdate = true; // always refresh while console is on

	// draw console background
	if (cons_backpic.value || con_forcepic)
	{
		patch_t *con_backpic = W_CachePatchName("CONSBACK", PU_CACHE);

		// Jimita: CON_DrawBackpic just called V_DrawScaledPatch
		V_DrawScaledPatch(0, 0, 0, con_backpic);

		W_UnlockCachedPatch(con_backpic);
	}
	else
	{
		// inu: no more width (was always 0 and vid.width)
		if (rendermode != render_none)
			V_DrawFadeConsBack(con_curlines); // translucent background
	}

	// draw console text lines from top to bottom
	if (con_curlines < minheight)
		return;

	i = con_cy - con_scrollup;

	// skip the last empty line due to the cursor being at the start of a new line
	i--;

	i -= (con_curlines - minheight) / charheight;

	if (rendermode == render_none) return;

	for (y = (con_curlines-minheight) % charheight; y <= con_curlines-minheight; y += charheight, i++)
	{
		INT32 x;
		size_t c;

		p = (UINT8 *)&con_buffer[((i > 0 ? i : 0)%con_totallines)*con_width];

		for (c = 0, x = charwidth; c < con_width; c++, x += charwidth, p++)
		{
			while (*p & 0x80)
			{
				charflags = (*p & 0x7f) << V_CHARCOLORSHIFT;
				p++;
			}
			V_DrawCharacter(x, y, (INT32)(*p) | charflags | cv_constextsize.value | V_NOSCALESTART, true);
		}
	}

	// draw prompt if enough place (not while game startup)
	if ((con_curlines == con_destlines) && (con_curlines >= minheight) && !con_startup)
		CON_DrawInput();
}

// Console refresh drawer, call each frame
//
void CON_Drawer(void)
{
	if (!con_started || !graphics_started)
		return;

	if (con_recalc)
		CON_RecalcSize();

	if (con_curlines > 0)
		CON_DrawConsole();
	else if (gamestate == GS_LEVEL
	|| gamestate == GS_INTERMISSION || gamestate == GS_ENDING || gamestate == GS_CUTSCENE
	|| gamestate == GS_CREDITS || gamestate == GS_EVALUATION)
		CON_DrawHudlines();
}