1 files changed, 241 insertions, 0 deletions
diff --git a/source/board.d b/source/board.d
new file mode 100644
index 0000000..9ec996b
--- /dev/null
+++ b/source/board.d
@@ -0,0 +1,241 @@
+import std.bigint;
+import deimos.ncurses;
+import std.string : toStringz;
+import std.math : floor, ceil;
+import std.array : appender;
+import std.range;
+import std.format;
+import std.stdio;
+import spots : Spot, SpotSource;
+
+public class Board
+{
+    private SpotSource _source;
+    // uint seed;
+    // indexed as Spot = Board[y, x]
+
+    this(SpotSource source)
+    {
+        _source = source;
+    }
+
+    Spot opIndex(BigInt y, BigInt x)
+    {
+        return _source[y, x];
+    }
+
+    Spot opIndex(long y, long x)
+    {
+        // possible per improvements
+        return opIndex(BigInt(y), BigInt(x));
+    }
+
+    PartialBoard opIndex(BigInt[2] y, BigInt[2] x)
+    {
+        return new PartialBoard(y, x, _source);
+    }
+
+    PartialBoard opIndex(long[2] y, long[2] x)
+    {
+        return opIndex([BigInt(y[0]), BigInt(y[1])], [
+                BigInt(x[0]), BigInt(x[1])
+                ]);
+    }
+
+    PartialBoard opIndex(BigInt[2] y, BigInt x)
+    {
+        return opIndex(y, [x, x + 1]);
+    }
+
+    PartialBoard opIndex(long[2] y, long x)
+    {
+        return opIndex([BigInt(y[0]), BigInt(y[1])], BigInt(x));
+    }
+
+    PartialBoard opIndex(BigInt y, BigInt[2] x)
+    {
+        return opIndex([y, y + 1], x);
+    }
+
+    PartialBoard opIndex(long y, long[2] x)
+    {
+        return opIndex(BigInt(y), [BigInt(x[0]), BigInt(x[1])]);
+    }
+
+    BigInt[2] opSlice(size_t dimension)(BigInt x, BigInt y)
+            if (dimension >= 0 && dimension < 2)
+    {
+        return [x, y];
+    }
+
+    long[2] opSlice(size_t dimension)(long x, long y)
+            if (dimension >= 0 && dimension < 2)
+    {
+        return [x, y];
+    }
+    // be more generic. instead of long use T where IsIntegral!T
+}
+
+enum Edge
+{
+    LEFT,
+    RIGHT,
+    TOP,
+    BOT,
+}
+
+class BoardDisplay
+{
+    private Board _board;
+    private WINDOW* _window;
+    private int _height, _width;
+    private string _status;
+    BigInt x = 0;
+    BigInt y = 0;
+
+    this(Board board, WINDOW* window)
+    {
+        _board = board;
+        _window = window;
+        getdims();
+    }
+
+    public void getdims()
+    {
+        getmaxyx(_window, _height, _width);
+    }
+
+    private void center()
+    {
+        mvprintw(_height, 0, toStringz(_status ~ " ".replicate(_width - status.length)));
+        move(cast(int) ceil(_height / 2.0), cast(int) ceil(_width / 2.0));
+    }
+
+    @property string status()
+    {
+        return _status;
+    }
+
+    @property status(string s)
+    {
+        _status = s;
+        center();
+    }
+
+    private BigInt edge(Edge e)
+    { // templating??
+        switch (e)
+        {
+        case Edge.LEFT:
+            return BigInt(cast(int) floor(-_width / 2.0)) + x;
+        case Edge.RIGHT:
+            return BigInt(cast(int) floor(_width / 2.0)) + x;
+        case Edge.TOP:
+            return BigInt(cast(int) floor(-_height / 2.0)) + y;
+        case Edge.BOT:
+            return BigInt(cast(int) floor(_height / 2.0)) + y;
+        default:
+            assert(0);
+        }
+    }
+
+    void print()
+    {
+        import std.stdio;
+        import std.datetime;
+
+        mvprintw(0, 0, toStringz(_board[edge(Edge.TOP) .. edge(Edge.BOT),
+                    edge(Edge.LEFT) .. edge(Edge.RIGHT)].toString()));
+        center();
+    }
+
+    void up()
+    { // the cursor moves up, the map scrolls down, leaving an empty line at top
+        y--;
+        scrl(-1);
+        mvprintw(0, 0, toStringz(_board[edge(Edge.TOP),
+                    edge(Edge.LEFT) .. edge(Edge.RIGHT)].toString()));
+        center();
+    }
+
+    void down()
+    {
+        y++;
+        scrl(1);
+        mvprintw(_height - 1, 0, toStringz(_board[edge(Edge.BOT) - 1,
+                    // necessary because opSlice is exclusive
+                    edge(Edge.LEFT) .. edge(Edge.RIGHT)].toString()));
+        center();
+    }
+
+    void left()
+    {
+        x--;
+        print();
+    }
+
+    void right()
+    {
+        x++;
+        print();
+    }
+}
+
+unittest
+{
+    import std.stdio;
+    import std.datetime;
+    import lru : LRUCache;
+    import spots : RandomSource, OverlaySource;
+
+    SysTime starttime = Clock.currTime();
+    auto random = new RandomSource();
+    auto source = new OverlaySource(random);
+    foreach (j; iota(100))
+    {
+        foreach (i; iota(400))
+        {
+            source[BigInt(i), BigInt(0)];
+        }
+    }
+    writeln(Clock.currTime() - starttime);
+    foreach (j; iota(100))
+    {
+        foreach (i; iota(400))
+        {
+            random[BigInt(i), BigInt(0)];
+        }
+    }
+    writeln(Clock.currTime() - starttime);
+}
+
+class PartialBoard : Board
+{
+    private BigInt[2] _yrange, _xrange;
+    this(BigInt[2] y, BigInt[2] x, SpotSource source)
+    {
+        _yrange = y;
+        _xrange = x;
+        super(source);
+    }
+
+    override Spot opIndex(BigInt y, BigInt x)
+    {
+        return _source[y + _yrange[0], x + _xrange[0]];
+    }
+
+    override string toString()
+    {
+        auto strBuilder = appender!string;
+        strBuilder.reserve(cast(ulong)((_yrange[1] - _yrange[0] + 2) * (_xrange[1] - _xrange[0] + 1)));
+        foreach (y; iota(_yrange[0], _yrange[1]))
+        {
+            foreach (x; iota(_xrange[0], _xrange[1]))
+            {
+                strBuilder.put(_source[y, x].contents);
+            }
+            strBuilder.put("\n");
+        }
+        return strBuilder.data;
+    }
+}