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with
Displays,
Grids,
Squares,
Things,
Ada.Command_Line,
Ada.Directories,
Ada.Text_IO,
Ada.Strings.Fixed,
Ada.Strings.Maps;
use
Ada.Text_IO;
package body Sokoban is
-- Forward declarations of helper functions.
procedure Add_New_Grid_Item
(X, Y : in Natural;
Char : in Character);
-- Global state of the game.
My_Display : Displays.Display := Displays.Create;
My_Grid : Grids.Grid := Grids.Create (0, 0);
Current_Level : LevelID;
-- Miscellaneous.
Origin : String := Ada.Directories.Containing_Directory
(Ada.Directories.Full_Name (Ada.Command_Line.Command_Name));
Level_Dir : String := Origin & "/../share/sokoban/level";
-- Main program interface.
procedure Load_Level
(Number : in LevelID)
is
use Ada.Strings, Ada.Strings.Fixed, Ada.Strings.Maps;
Data_File : File_Type;
Filename : String :=
Level_Dir & "/level" & Trim (LevelID'Image (Number), Both) & ".data";
Rows, Cols : Natural;
begin
Open (Data_File, In_File, Filename);
declare
Row_Line : String := Get_Line (Data_File);
Col_Line : String := Get_Line (Data_File);
Start, Finish : Natural;
begin
Find_Token (Row_Line, To_Set ("0123456789"), 1, Inside, Start, Finish);
Rows := Natural'Value (Row_Line (Start .. Finish));
Find_Token (Col_Line, To_Set ("0123456789"), 1, Inside, Start, Finish);
Cols := Natural'Value (Col_Line (Start .. Finish));
end;
My_Display.Adjust_Grid (Cols, Rows);
for Y in Integer range 1 .. Rows loop
declare
Working_Line : String := Get_Line (Data_File);
begin
for X in Integer range 1 .. Cols loop
Add_New_Grid_Item (X, Y, Working_Line (X));
end loop;
end;
end loop;
Close (Data_File);
Current_Level := Number;
My_Display.Centre_On_Screen;
end Load_Level;
procedure Show is
begin
My_Display.Show;
end Show;
procedure Hide is
begin
My_Display.Hide;
end Hide;
-- Callbacks for keyboard controls.
-- Helper functions.
procedure Add_New_Grid_Item
(X, Y : in Natural;
Char : in Character)
is
Temp : Squares.Square;
begin
case Char is
when '#' =>
My_Grid.Set_Square (X, Y, Squares.Wall);
when ' ' =>
My_Grid.Set_Square (X, Y, Squares.Empty);
when '$' =>
Temp := Squares.Empty;
Temp.Set_Contents (Things.Treasure);
My_Grid.Set_Square (X, Y, Temp);
when '*' =>
Temp := Squares.Goal;
Temp.Set_Contents (Things.Treasure);
My_Grid.Set_Square (X, Y, Temp);
when '!' =>
My_Grid.Set_Square (X, Y, Squares.Space);
when '.' =>
My_Grid.Set_Square (X, Y, Squares.Goal);
when '@' =>
Temp := Squares.Empty;
Temp.Set_Contents (Things.Man);
My_Grid.Set_Square (X, Y, Temp);
when others =>
raise Program_Error;
end case;
end Add_New_Grid_Item;
begin
My_Display.Set_Grid (My_Grid);
end Sokoban;
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