/// <summary>
/// Creates a puzzle editor. This object offers
/// all functionality related to the creation and modification
/// of puzzles.
/// </summary>
/// <param name="puzzle">Puzzle to be edited. Note that this object cannot be changed; the editor
/// uses this puzzle solely as an initial state.</param>
/// <returns>An IPuzzleEditor object.</returns>
public IPuzzleEditor CreatePuzzleEditor(Puzzle puzzle)
{
var editorGrid = EditorGrid.FromPuzzle(puzzle);
var puzzleEditor = new PuzzleEditor(editorGrid);
return(puzzleEditor);
}
/// <summary>
/// Creates a Puzzle from a solution. The constraints
/// will be inferred.
/// </summary>
/// <param name="grid">Solution represented by a grid of Squares.</param>
/// <returns>A Puzzle with the given solution.</returns>
public static Puzzle FromGrid(IGrid <Square> grid)
{
var editorGrid = new EditorGrid(grid);
var columnConstraints = editorGrid.DeriveColumnConstraints();
var rowConstraints = editorGrid.DeriveRowConstraints();
var boolGrid = ConvertSquareGridToBoolGrid(grid);
return(new Puzzle(columnConstraints: columnConstraints, rowConstraints: rowConstraints, grid: boolGrid));
}
public PuzzleEditor(EditorGrid editorGrid)
{
if (editorGrid == null)
{
throw new ArgumentNullException(nameof(editorGrid));
}
else
{
this.editorGrid = editorGrid;
ambiguityChecker = new AmbiguityChecker(columnConstraints: editorGrid.DeriveColumnConstraints(), rowConstraints: editorGrid.DeriveRowConstraints());
ambiguityGrid = ambiguityChecker.Ambiguities.Map(( Ambiguity x ) => Cell.Create(x)).Copy();
facadeGrid = editorGrid.Contents.Map(position => new PuzzleEditorSquare(this, position, ambiguityGrid[position])).Copy();
columnConstraints = editorGrid.Contents.ColumnIndices.Select(x => new PuzzleEditorColumnConstraints(editorGrid, x)).ToSequence();
rowConstraints = editorGrid.Contents.RowIndices.Select(y => new PuzzleEditorRowConstraints(editorGrid, y)).ToSequence();
}
}
public PuzzleEditorColumnConstraints(EditorGrid parent, int column)
: base(() => parent.DeriveColumnConstraints(column))
{
// NOP
}
public PuzzleEditorRowConstraints(EditorGrid parent, int row)
: base(() => parent.DeriveRowConstraints(row))
{
// NOP
}