(*
    Copyright 2016, 2017, 2020-2022 Anton Krotov

    This file is part of CEdit.

    CEdit 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 3 of the License, or
    (at your option) any later version.

    CEdit 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 CEdit. If not, see <http://www.gnu.org/licenses/>.
*)

MODULE EditBox;

IMPORT SYSTEM, KOSAPI, Encodings;

CONST

	MAX_LENGTH = 1024;


TYPE

	tEditBox* = RECORD
		width*,
		left*,
		top*,
		color*,
		shift_color,
		focus_border_color,
		blur_border_color,
		text_color*,
		max: INTEGER;
		text*: INTEGER;
		mouse_variable: INTEGER;
		flags*: SET;

		size,
		pos: INTEGER;
		(* The following struct members are not used by the users of API *)
		offset, cl_curs_x, cl_curs_y, shift, shift_old, height, char_width: INTEGER
	END;


PROCEDURE [stdcall, "box_lib.obj", "edit_box_draw"]     draw* (eb: tEditBox); END;
PROCEDURE [stdcall, "box_lib.obj", "edit_box_mouse"]    mouse* (eb: tEditBox); END;
PROCEDURE [stdcall, "box_lib.obj", "edit_box_set_text"] set_text (eb: tEditBox; text: INTEGER); END;
PROCEDURE [stdcall, "box_lib.obj", "edit_box_key_safe"] key* (eb: tEditBox; key: INTEGER); END;

PROCEDURE get* (text: tEditBox; VAR str: ARRAY OF CHAR);
VAR
	ptr, max, i: INTEGER;
BEGIN
	ptr := text.text;
	max := text.max;
	ASSERT(max < LEN(str));
	i := 0;
	REPEAT
		SYSTEM.GET(ptr, str[i]);
		INC(i);
		INC(ptr)
	UNTIL (str[i - 1] = 0X) OR (i = max);
	str[i] := 0X
END get;


PROCEDURE set* (text: tEditBox; str: ARRAY OF WCHAR);
VAR
	i: INTEGER;
	temp: ARRAY MAX_LENGTH OF CHAR;
BEGIN
	ASSERT(LENGTH(str) < LEN(temp));
	i := 0;
	REPEAT
		temp[i] := CHR(Encodings.UNI[ORD(str[i]), Encodings.CP866] MOD 256);
		INC(i)
	UNTIL str[i - 1] = 0X;
	set_text(text, SYSTEM.ADR(temp[0]))
END set;


PROCEDURE create* (x, y, width, max_chars: INTEGER; VAR editbox: tEditBox);
BEGIN
	editbox.width := width;
	editbox.left := x;
	editbox.top := y;
	editbox.color := 0FFFFFFH;
	editbox.shift_color := 06A9480H;
	editbox.focus_border_color := 0;
	editbox.blur_border_color := 06A9480H;
	editbox.text_color := 30000000H;
	editbox.max := max_chars;
	editbox.text := KOSAPI.malloc(max_chars + 2);
	ASSERT(editbox.text # 0);
	editbox.mouse_variable := 0;
	editbox.flags := {14}
END create;


END EditBox.