/// <summary>
/// Generate the list of across word spaces.
/// </summary>
private void GenerateAcrossWordSpaces()
{
_wordSpaces = new List <WordSpace>();
for (int row = 0; row < _puzzleGrid[0].Length; ++row)
{
int endColumn;
var startColumn = endColumn = 0;
do
{
if (_puzzleGrid[endColumn][row] != BLOCK)
{
// Read word space.
while (endColumn < _puzzleGrid.Length && _puzzleGrid[endColumn][row] != BLOCK)
{
++endColumn;
}
int length = endColumn - startColumn;
if (!_lengthGroups.ContainsKey(length))
{
continue;
}
// We have an across word space.
var word = new WordSpace()
{
Direction = Direction.Across,
EndPoint = new Cell(endColumn - 1, row),
Filled = false,
Length = length,
PossibleWords = _lengthGroups.ContainsKey(length)
? new List <string>(_lengthGroups[length])
: new List <string>(),
StartPoint = new Cell(startColumn, row)
};
_wordSpaces.Add(word);
}
else
{
// Skip over block sequence.
while (endColumn < _puzzleGrid.Length && _puzzleGrid[endColumn][row] == BLOCK)
{
++endColumn;
}
startColumn = endColumn;
}
} while (endColumn < _puzzleGrid.Length);
}
}
/// <summary>
/// Generate the list of down word spaces.
/// </summary>
private void GenerateDownWordSpaces()
{
for (int column = 0; column < _puzzleGrid.Length; ++column)
{
int endRow;
var startRow = endRow = 0;
do
{
if (_puzzleGrid[column][endRow] == SPACE)
{
// Read word space.
while (endRow < _puzzleGrid[0].Length && _puzzleGrid[column][endRow] != BLOCK)
{
++endRow;
}
int length = endRow - startRow;
if (!_lengthGroups.ContainsKey(length))
{
continue;
}
// We have an across word space.
var wordSpace = new WordSpace()
{
Direction = Direction.Down,
EndPoint = new Cell(column, endRow - 1),
Filled = false,
Length = length,
PossibleWords = _lengthGroups.ContainsKey(length)
? new List <string>(_lengthGroups[length])
: new List <string>(),
StartPoint = new Cell(column, startRow)
};
_wordSpaces.Add(wordSpace);
}
else // (puzzleGrid[column][endRow] == BLOCK)
{
// Skip over block sequence.
while (endRow < _puzzleGrid[0].Length && _puzzleGrid[column][endRow] == BLOCK)
{
++endRow;
}
startRow = endRow;
}
} while (endRow < _puzzleGrid[0].Length);
}
}
private void InvalidOperation(WordSpace wordSpace, string methodName)
{
throw new InvalidOperationException(methodName + " | All possible words were eliminated for word space at (" +
wordSpace.StartPoint.Column + "," + wordSpace.StartPoint.Row + ") to (" +
wordSpace.EndPoint.Column + "," + wordSpace.EndPoint.Row + ").");
}