(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2008 Andrey Korotaev <unC0Rr@gmail.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; version 2 of the License

 *

 * 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

 *)

unit uChat;

interface

procedure AddChatString(s: shortstring);

procedure DrawChat;

procedure KeyPressChat(Key: Longword);

var UserNick: shortstring = '';

	showAll: boolean = false;

implementation

uses uMisc, uStore, uConsts, SDLh, uConsole, uKeys, uTeams;

const MaxStrIndex = 27;

type TChatLine = record

		s: shortstring;

		Time: Longword;

		end;

var Strs: array[0 .. MaxStrIndex] of TChatLine;

	lastStr: Longword = 0;

	visibleCount: Longword = 0;

	InputStr: TChatLine;

	InputStrL: array[0..260] of char; // for full str + 4-byte utf-8 char

procedure SetLine(var cl: TChatLine; str: shortstring; isInput: boolean);

begin

cl.s:= str;

if isInput then str:= UserNick + '> ' + str + '_';

end;

procedure AddChatString(s: shortstring);

begin

lastStr:= (lastStr + 1) mod (MaxStrIndex + 1);

SetLine(Strs[lastStr], s, false);

inc(visibleCount)

end;

procedure DrawChat;

var i, t, cnt: Longword;

begin

cnt:= 0;

t:= 0;

i:= lastStr;

while

	(

			((t < 7) and (Strs[i].Time > RealTicks))

		or

			((t < MaxStrIndex) and showAll)

	)

	and

	begin

	if i = 0 then i:= MaxStrIndex else dec(i);

	inc(cnt);

	inc(t)

	end;

visibleCount:= cnt;

if (GameState = gsChat)

end;

procedure AcceptChatString(s: shortstring);

var i: TWave;

begin

if s[1] = '/' then

	begin

	if CurrentTeam^.ExtDriven then exit;

	for i:= Low(TWave) to High(TWave) do

		if (s = Wavez[i].cmd) then

			begin

			ParseCommand('/taunt ' + char(i), true);

			exit

			end;

	end

	else

		ParseCommand('/say ' + s, true);

end;

procedure KeyPressChat(Key: Longword);

const firstByteMark: array[1..4] of byte = (0, $C0, $E0, $F0);

var i, btw: integer;

    utf8: shortstring;

begin

if Key <> 0 then

	case Key of

		8: if Length(InputStr.s) > 0 then

				begin

				InputStr.s[0]:= InputStrL[byte(InputStr.s[0])];

				SetLine(InputStr, InputStr.s, true)

				end;

		27: SetLine(InputStr, '', true);

		13, 271: begin

			if Length(InputStr.s) > 0 then

				begin

				AcceptChatString(InputStr.s);

				end;

			FreezeEnterKey;

			GameState:= gsGame

			end

	else

	if (Key < $80) then btw:= 1

	else if (Key < $800) then btw:= 2

	else if (Key < $10000) then btw:= 3

	else btw:= 4;

	utf8:= '';

	for i:= btw downto 2 do

		begin

		utf8:= char((Key or $80) and $BF) + utf8;

		Key:= Key shr 6

		end;

	utf8:= char(Key or firstByteMark[btw]) + utf8;

	InputStrL[byte(InputStr.s[0]) + btw]:= InputStr.s[0];

	SetLine(InputStr, InputStr.s + utf8, true)

	end

end;

end.