(*
    Copyright 2016, 2018, 2020-2023 Anton Krotov

    This file is part of fb2read.

    fb2read 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.

    fb2read 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 fb2read. If not, see <http://www.gnu.org/licenses/>.
*)

MODULE Settings;

IMPORT SU := SysUtils, W := Window, C := ColorDlg, DOM, S := Strings, K := KOSAPI, File,
       Font, KF := kfonts, OD := OpenDlg, LibImg, G := Graph, Ini, box_lib, sys := SYSTEM;


CONST

  DAY                   = 19;
  NIGHT                 = 20;
  APPLY                 = 21;
  CANCEL                = 22;
  BACK_PICTURE          = 23;

  C100                  = 100;

  CHANGE_BACK_COLOR     = DOM.BACK_COLOR     + C100;
  CHANGE_TEXT_COLOR     = DOM.TEXT_COLOR     + C100;
  CHANGE_ITALIC_COLOR   = DOM.ITALIC_COLOR   + C100;
  CHANGE_LINK_COLOR     = DOM.LINK_COLOR     + C100;
  CHANGE_VISITED_COLOR  = DOM.VISITED_COLOR  + C100;

  MAX_LRpc              =  25;
  MAX_Top               = 120;
  MAX_PARAGRAPH         = 120;
  MAX_EPIGRAPH          = 120;
  MAX_CInt              =  25;
  MAX_InterLin          =  50;
  MAX_FONT_SIZE         =  40;
  MIN_FONT_SIZE         =  10;

  BtnH*     =       25;
  BoxW      =       50;
  TextLeft  =       20;
  BtnW*     =       80;


VAR

  Window   : W.tWindow;
  PID      : INTEGER;
  Slot     : INTEGER;
  Color    : C.Dialog;
  Data     : DOM.TSettings;

  String   : S.STRING;

  sb       : ARRAY 7 OF box_lib.scrollbar;
  check1   : box_lib.checkbox;
  check2   : box_lib.checkbox;
  OpenPict : OD.Dialog;
  picture  : INTEGER;
  picture_fsize : INTEGER;

  picture_path : S.STRING;


PROCEDURE Close*;
VAR pid: INTEGER;
BEGIN
  IF PID # 0 THEN
    pid := PID;
    PID := 0;
    IF (picture # Data.Picture) & (picture # 0) THEN
    	picture := K.free(picture);
    	picture_fsize := 0
    END;
    C.Destroy(Color);
    OD.Destroy(OpenPict);
    SU.TerminateThreadId(pid)
  END
END Close;


PROCEDURE ClearWindow;
BEGIN
  SU.Box(0, 0, Window.width - 10, Window.height - SU.SkinHeight() - 5, SU.winColor, SU.winColor)
END ClearWindow;


PROCEDURE OutText (x, y: INTEGER; text: ARRAY OF CHAR);
BEGIN
	SU.OutText(x, y, text, LENGTH(text), SU.textColor)
END OutText;


PROCEDURE PlusMinus(x, y, max, min: INTEGER; _sb: box_lib.scrollbar);
VAR range, Y: INTEGER;
    sysfont: ARRAY 20 OF CHAR;
BEGIN
  sysfont := "System font only";
  S.IntToString(_sb.position + min, String);
  IF _sb = sb[0] THEN
    Y := y - (BtnH + 10) * 2 + 26;
    SU.Box(TextLeft + 230, Y, SU.FontW * LENGTH(sysfont), SU.FontH, SU.winColor, SU.winColor);
    IF ~KF.Enabled(Font.KFont, _sb.position + min) THEN
      OutText(TextLeft + 230, Y, sysfont)
    END
  END;
  SU.Box(x + 25, y + 6, SU.FontW * 4, SU.FontH, SU.winColor, SU.winColor);
  OutText(x + 25  + (35 - SU.FontW * LENGTH(String)) DIV 2, y + 6, String);
  x := x + 60 - 25;
  range := max - min;
  _sb := box_lib.kolibri_scrollbar(_sb, (x + 30) * 65536 + 196, y * 65536 + 22 + 2, 22, range + range DIV 10, range DIV 10,
  		_sb.position, SU.lightColor, SU.btnColor, 0, 2)
END PlusMinus;


PROCEDURE Buttons;

VAR

  X, Y, TextY       : INTEGER;
  WinW, WinH, SkinH : INTEGER;
  i                 : INTEGER;
  Rect              : W.tRect;

BEGIN
  Rect.left := 10;
  Rect.top := 85;
  Rect.width := 210;
  Rect.height := 255;
  SU.Box(Rect.left, Rect.top, Rect.width, Rect.height, SU.winColor, SU.borderColor);
  SU.Box(Rect.left + 230, Rect.top, Rect.width + 170, Rect.height, SU.winColor, SU.borderColor);

  WinW := Window.width;
  WinH := Window.height;
  SkinH := SU.SkinHeight();
  X := 125;
  Y := 10;
  IF picture = 0 THEN
    OutText(TextLeft + 20, Y + 6, "back picture (none)")
  ELSE
    OutText(TextLeft + 20, Y + 6, "back picture")
  END;
  SU.CreateButton(BACK_PICTURE, X + 75, Y, 30, BtnH, SU.btnColor, "...");

  Y := 10 + (BtnH + 10);

  OutText(TextLeft + 20, Y + 6, "two columns");

  Y := Y + (BtnH + 10) * 2 - 20;

  TextY := Y;
  FOR i := 0 TO 4 DO
      SU.Box(X, Y, BoxW, BtnH, Data.Colors[i], 0);
      SU.CreateButton(i + C100, X + BoxW + 5, Y, 30, BtnH, SU.btnColor, "...");
      Y := Y + BtnH + 10;
  END;

  X := 20; Y := TextY + 6;

  OutText(TextLeft, Y, "back");     OutText(TextLeft + 230, Y, "font size");      PlusMinus(TextLeft + 330, Y - 6, MAX_FONT_SIZE, MIN_FONT_SIZE, sb[0]); Y := Y + BtnH + 10;
  OutText(TextLeft, Y, "text");     OutText(TextLeft + 230, Y, "left & right %"); PlusMinus(TextLeft + 330, Y - 6, MAX_LRpc,                  0, sb[1]); Y := Y + BtnH + 10;
  OutText(TextLeft, Y, "italic");   OutText(TextLeft + 230, Y, "col. spacing %"); PlusMinus(TextLeft + 330, Y - 6, MAX_CInt,                  0, sb[2]); Y := Y + BtnH + 10;
  OutText(TextLeft, Y, "link");     OutText(TextLeft + 230, Y, "top & bottom");   PlusMinus(TextLeft + 330, Y - 6, MAX_Top,                   0, sb[3]); Y := Y + BtnH + 10;
  OutText(TextLeft, Y, "visited");  OutText(TextLeft + 230, Y, "paragraph");      PlusMinus(TextLeft + 330, Y - 6, MAX_PARAGRAPH,             0, sb[4]); Y := Y + BtnH + 10;

  OutText(TextLeft + 230, Y, "epigraph");     PlusMinus(TextLeft + 330, Y - 6, MAX_EPIGRAPH,  0, sb[5]); Y := Y + BtnH + 10;
  OutText(TextLeft + 230, Y, "line spacing"); PlusMinus(TextLeft + 330, Y - 6, MAX_InterLin,  0, sb[6]);

  Y := Y - 6;

  SU.CreateButton(DAY,   (Rect.width - (BtnW + 5 + BtnW)) DIV 2 + Rect.left,                       Y, 80, BtnH, SU.btnColor, "Day"   );
  SU.CreateButton(NIGHT, (Rect.width - (BtnW + 5 + BtnW)) DIV 2 + Rect.left + 5 + BtnW,            Y, 80, BtnH, SU.btnColor, "Night" );

  SU.CreateButton(APPLY,  (WinW - (BtnW + 5 + BtnW) - 10) DIV 2,            WinH - BtnH - SkinH - 10, 80, BtnH, SU.btnColor, "Apply" );
  SU.CreateButton(CANCEL, (WinW - (BtnW + 5 + BtnW) - 10) DIV 2 + 5 + BtnW, WinH - BtnH - SkinH - 10, 80, BtnH, SU.btnColor, "Cancel");

  FOR i := 0 TO LEN(sb) - 1 DO
    box_lib.scrollbar_h_draw(sb[i])
  END;
  box_lib.check_box_draw2(check1);
  box_lib.check_box_draw2(check2);

END Buttons;


PROCEDURE DrawWindow;
BEGIN
  SU.GetSystemColors;
  SU.WindowRedrawStatus(1);
  SU.DefineAndDrawWindow(Window.left, Window.top, Window.width, Window.height,
        SU.winColor, LSL(ORD({0, 1}), 4) + 4, Window.caption);
  Buttons;
  SU.WindowRedrawStatus(2)
END DrawWindow;


PROCEDURE SelColor(Color: C.Dialog; Default: INTEGER): INTEGER;
VAR Result: INTEGER;
BEGIN
  Result := Default;
  IF Color # NIL THEN
    C.Show(Color);
    WHILE Color.status = 2 DO
      SU.Pause(20)
    END;
    IF Color.status = 1 THEN
      Result := Color.color
    END
  END
  RETURN Result
END SelColor;


PROCEDURE ChangeColor(idx: INTEGER);
BEGIN
  Data.Colors[idx] := SelColor(Color, Data.Colors[idx])
END ChangeColor;


PROCEDURE Day;
BEGIN
  Data.Colors[DOM.BACK_COLOR]     := 0F0F0C7H;
  Data.Colors[DOM.TEXT_COLOR]     := 0000000H;
  Data.Colors[DOM.ITALIC_COLOR]   := 0505050H;
  Data.Colors[DOM.LINK_COLOR]     := 00000FFH;
  Data.Colors[DOM.VISITED_COLOR]  := 0800080H;
  Data.Colors[DOM.CLICKED_COLOR]  := 0FF0000H;
END Day;


PROCEDURE Night;
BEGIN
  Data.Colors[DOM.BACK_COLOR]     := 0000000H;
  Data.Colors[DOM.TEXT_COLOR]     := 0AFAFAFH;
  Data.Colors[DOM.ITALIC_COLOR]   := 07F7F7FH;
  Data.Colors[DOM.LINK_COLOR]     := 000A0D0H;
  Data.Colors[DOM.VISITED_COLOR]  := 0C000C0H;
  Data.Colors[DOM.CLICKED_COLOR]  := 0FF0000H;
END Night;


PROCEDURE Apply;
BEGIN
  Data.FontSize     := sb[0].position + MIN_FONT_SIZE;
  Data.PADDING.LRpc := sb[1].position;
  Data.PADDING.CInt := sb[2].position;
  Data.PADDING.Top  := sb[3].position;
  Data.PARAGRAPH    := sb[4].position;
  Data.EPIGRAPH     := sb[5].position;
  Data.InterLin     := sb[6].position;
  IF (picture # 0) & (picture # Data.Picture) THEN
  	IF Data.Picture # 0 THEN
    	Data.Picture := K.free(Data.Picture)
    END;
    Data.Picture := picture;
    Data.picture_fsize := picture_fsize;
    Ini.SetPicturePath(picture_path)
  END;
  picture := 0;
  picture_fsize := 0;
  DOM.SetSettings(Data);
  Close
END Apply;


PROCEDURE LoadPicture(file_path: S.STRING);
VAR fsize, img: INTEGER;
BEGIN
  img := File.Load(file_path, fsize);
  IF img # 0 THEN
    IF (picture # 0) & (picture # Data.Picture) THEN
      picture := K.free(picture)
    END;
    picture := img;
    picture_fsize := fsize;
    picture_path := file_path
  END
END LoadPicture;


PROCEDURE OpenPicture;
BEGIN
  IF OpenPict # NIL THEN
    OD.Show(OpenPict, 500, 400);
    WHILE OpenPict.status = 2 DO
      SU.Pause(30)
    END;
    IF OpenPict.status = 1 THEN
      COPY(OpenPict.FilePath, picture_path);
      LoadPicture(picture_path)
    END
  END
END OpenPicture;


PROCEDURE ButtonClick;
BEGIN
  CASE SU.GetButtonCode() OF
  |0                      :
  |1                      : Close
  |BACK_PICTURE           : OpenPicture
  |DAY                    : Day
  |NIGHT                  : Night
  |APPLY                  : Apply
  |CANCEL                 : Close

  |CHANGE_BACK_COLOR      : ChangeColor(DOM.BACK_COLOR)
  |CHANGE_TEXT_COLOR      : ChangeColor(DOM.TEXT_COLOR)
  |CHANGE_ITALIC_COLOR    : ChangeColor(DOM.ITALIC_COLOR)
  |CHANGE_LINK_COLOR      : ChangeColor(DOM.LINK_COLOR)
  |CHANGE_VISITED_COLOR   : ChangeColor(DOM.VISITED_COLOR)

  END;
  ClearWindow;
  Buttons
END ButtonClick;


PROCEDURE Default*;
BEGIN
  Day;
  Data.FontSize     := 16;
  Data.TwoCol       := FALSE;
  Data.PADDING.Top  := 15;
  Data.PADDING.LRpc := 3;
  Data.PADDING.CInt := 6;
  Data.PARAGRAPH    := 30;
  Data.EPIGRAPH     := 100;
  Data.InterLin     := 0;
  Data.Picture      := picture;
  Data.picture_fsize := picture_fsize;
  DOM.SetSettings(Data)
END Default;


PROCEDURE Show;
VAR i, scrWidth, scrHeight: INTEGER;
BEGIN
  SU.SetEventsMask({0, 2, 5, 30, 31});
  W.init(Window, 0, 0, 640, 420, "Settings");
  SU.GetScreenSize(scrWidth, scrHeight);
  Window.left := (scrWidth - Window.width) DIV 2;
  Window.top  := (scrHeight - Window.height) DIV 2;
  Color := C.Create(DrawWindow);
  OpenPict := OD.Create(DrawWindow, 0, "/sys", "JPG|PNG|BMP|GIF");
  Data := DOM.Settings;
  picture := Data.Picture;
  picture_fsize := Data.picture_fsize;
  DrawWindow;
  WHILE TRUE DO
    CASE SU.WaitForEvent() OF
    |1 : DrawWindow
    |3 : ButtonClick
    |6 : FOR i := 0 TO LEN(sb) - 1 DO
           box_lib.scrollbar_h_mouse(sb[i])
         END;
         box_lib.check_box_mouse2(check1);
         box_lib.check_box_mouse2(check2);
         PlusMinus(TextLeft + 330, sb[0].y_h DIV 65536, MAX_FONT_SIZE,  MIN_FONT_SIZE, sb[0]);
         PlusMinus(TextLeft + 330, sb[1].y_h DIV 65536, MAX_LRpc,                   0, sb[1]);
         PlusMinus(TextLeft + 330, sb[2].y_h DIV 65536, MAX_CInt,                   0, sb[2]);
         PlusMinus(TextLeft + 330, sb[3].y_h DIV 65536, MAX_Top,                    0, sb[3]);
         PlusMinus(TextLeft + 330, sb[4].y_h DIV 65536, MAX_PARAGRAPH,              0, sb[4]);
         PlusMinus(TextLeft + 330, sb[5].y_h DIV 65536, MAX_EPIGRAPH,               0, sb[5]);
         PlusMinus(TextLeft + 330, sb[6].y_h DIV 65536, MAX_InterLin,               0, sb[6]);
         Data.TwoCol := box_lib.check_box_get_value(check1);
         Data.b_pict := box_lib.check_box_get_value(check2);
    END
  END
END Show;


PROCEDURE Open*;
BEGIN
  IF PID = 0 THEN
    Data := DOM.Settings;
    box_lib.check_box_set_value(check1, Data.TwoCol);
    box_lib.check_box_set_value(check2, Data.b_pict);
    PID := SU.NewThread(Show, DOM.Stack);
    Slot := SU.GetThreadSlot(PID);
    sb[0].position := Data.FontSize - MIN_FONT_SIZE;
    sb[1].position := Data.PADDING.LRpc;
    sb[2].position := Data.PADDING.CInt;
    sb[3].position := Data.PADDING.Top;
    sb[4].position := Data.PARAGRAPH;
    sb[5].position := Data.EPIGRAPH;
    sb[6].position := Data.InterLin;
  ELSE
    SU.FocusWindow(Slot)
  END
END Open;


PROCEDURE main;
VAR i: INTEGER;
    bpicture, twocol: ARRAY 20 OF CHAR;
BEGIN
  PID := 0;
  FOR i := 0 TO LEN(sb) - 1 DO
    sb[i] := box_lib.kolibri_new_scrollbar(10 * 65536 + 200, 10 * 65536 + 22 + 2, 22, 15, 10, 0, 0, 0, 0, 2)
  END;
  bpicture := "back picture";
  twocol := "two columns";
  check2 := box_lib.kolibri_new_check_box(TextLeft, 10 + 5,               16, 16, sys.SADR(""), LENGTH(bpicture) * 8 + 5);
  check1 := box_lib.kolibri_new_check_box(TextLeft, 10 + (BtnH + 10) + 5, 16, 16, sys.SADR(""), LENGTH(twocol)  * 8 + 5);
  picture := 0;
  picture_fsize := 0;
  IF Ini.Picture # "" THEN
    LoadPicture(Ini.Picture)
  END
END main;


BEGIN
  main
END Settings.