(*
    Copyright 2021-2023 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 StatusBar;

IMPORT G := Graph, U := Utils, K := KolibriOS;

TYPE

	tString = ARRAY 32 OF WCHAR;

	tStatusBar* = RECORD

		pos, sel, enc: tString;
		canvas: G.tCanvas

	END;

VAR

	SB: tStatusBar;
	font: G.tFont;


PROCEDURE setPos* (line, col: INTEGER);
VAR
	s1, s2: tString;
BEGIN
	U.int2str(line, s1);
	U.append(s1, ": ");
	U.int2str(col, s2);
	U.append(s1, s2);
	SB.pos := s1
END setPos;


PROCEDURE setSel* (text: ARRAY OF WCHAR; first, second: INTEGER; delimiter: ARRAY OF WCHAR);
VAR
	s1, s2: tString;
BEGIN
	IF first # 0 THEN
		s1 := text;
		U.int2str(first, s2);
		U.append(s1, s2);
		U.append(s1, delimiter);
		U.int2str(second, s2);
		U.append(s1, s2);
		SB.sel := s1
	ELSE
		SB.sel := ""
	END
END setSel;


PROCEDURE setEnc* (eol, enc: ARRAY OF WCHAR);
BEGIN
	SB.enc := eol;
	U.append(SB.enc, 20X + 20X);
	U.append(SB.enc, enc)
END setEnc;


PROCEDURE height* (): INTEGER;
	RETURN font.height + 3
END height;


PROCEDURE setWidth* (width: INTEGER);
BEGIN
	ASSERT(width > 0);
	IF (SB.canvas = NIL) OR (SB.canvas.width # width) OR (SB.canvas.height # height()) THEN
		G.destroy(SB.canvas);
		SB.canvas := G.CreateCanvas(width, height());
		G.SetFont(SB.canvas, font)
	END
END setWidth;


PROCEDURE TextOut (x: INTEGER; s: ARRAY OF WCHAR);
BEGIN
	G.TextOut2(SB.canvas, x, 2, s, LENGTH(s))
END TextOut;


PROCEDURE draw* (left, top: INTEGER);
BEGIN
	G.SetColor(SB.canvas, K.colors.work);
	G.SetBkColor(SB.canvas, K.colors.work);
	G.SetTextColor(SB.canvas, K.colors.work_text);
	G.clear(SB.canvas);
	TextOut(1, SB.pos);
	TextOut(16*font.width, SB.sel);
	TextOut(SB.canvas.width - LENGTH(SB.enc)*font.width - 1, SB.enc);
	G.DrawCanvas(SB.canvas, left, top)
END draw;


PROCEDURE SetFont* (_font: G.tFont);
BEGIN
	font := _font;
	IF SB.canvas # NIL THEN
		setWidth(SB.canvas.width)
	END
END SetFont;


BEGIN
	SB.canvas := NIL;
	font := G.fonts[1]
END StatusBar.