(*

 * Hedgewars, a worms-like 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);

implementation

const MaxStrIndex = 7;

type TChatLine = record

		s: shortstring;

		Time: Longword;

		Tex: PTexture;

		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);

var strSurface, resSurface: PSDL_Surface;

    r: TSDL_Rect;

    w, h: LongInt;

begin

if cl.Tex <> nil then

	FreeTexture(cl.Tex);

TTF_SizeUTF8(Fontz[fnt16].Handle, Str2PChar(str), w, h);

resSurface:= SDL_CreateRGBSurface(0,

		toPowerOf2(w + 2),

		toPowerOf2(h + 2),

		32,

		RMask, GMask, BMask, AMask);

strSurface:= TTF_RenderUTF8_Solid(Fontz[fnt16].Handle, Str2PChar(str), $202020);

r.x:= 1;

r.y:= 1;

SDL_UpperBlit(strSurface, nil, resSurface, @r);

strSurface:= TTF_RenderUTF8_Solid(Fontz[fnt16].Handle, Str2PChar(str), $FFFFFF);

SDL_UpperBlit(strSurface, nil, resSurface, nil);

SDL_FreeSurface(strSurface);

cl.Time:= RealTicks + 7500;

cl.Tex:= Surface2Tex(resSurface);

SDL_FreeSurface(resSurface)

end;

procedure AddChatString(s: shortstring);

begin

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

SetLine(Strs[lastStr], s);

inc(visibleCount)

end;

procedure DrawChat;

var i, t, cnt: Longword;

begin

cnt:= 0;

t:= 0;

i:= lastStr;

while (t <= MaxStrIndex)

	and (Strs[i].Tex <> nil)

	and (Strs[i].Time > RealTicks) do

	begin

	DrawTexture(8, (visibleCount - t) * 16 - 6 + cConsoleYAdd, Strs[i].Tex);

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

	inc(cnt);

	inc(t)

	end;

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)

				end;

		13,271: begin

			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)

	end

end;

end.