public static bool VectorHasLetters(this IWordGrid g, WordVector vec)
{
Point p = vec.Pos;
for (int i = 0; i < vec.Length; i++)
{
if (g[p] == null)
{
return(false);
}
p = p.NextPoint(vec.Dir);
}
return(true);
}
/// <summary>
/// Returns the longest possible vector that occupies valid letters in the grid
/// </summary>
/// <param name="pos">Start pos</param>
/// <param name="dir">Direction</param>
/// <returns>null id no vector is possible</returns>
public static WordVector FindLongestWordVector(this IWordGrid g, Point pos, Dir2D dir)
{
if (dir == Dir2D.None)
{
return(null);
}
Point p = pos;
int len = 0;
while (g.InBounds(p) && (g[p] != null))
{
len++;
p = p.NextPoint(dir);
}
return((len > 0) ? new WordVector(pos, dir, len) : null);
}
public static void placeWord(this IWordGrid g, string text, WordVector vec)
{
if (vec.Dir == Dir2D.None)
{
return;
}
Point p = vec.Pos;
int len = 0;
while (g.InBounds(p) &&
(len < vec.Length))
{
g[p] = text[len];
len++;
p = p.NextPoint(vec.Dir);
}
}
public static string GetWord(this IWordGrid g, WordVector vec)
{
if (vec.Dir == Dir2D.None)
{
return(null);
}
Point p = vec.Pos;
int len = 0;
string str = "";
while (g.InBounds(p) && (g[p] != null) && (len < vec.Length))
{
str = str + g[p].Value;
len++;
p = p.NextPoint(vec.Dir);
}
return((len == vec.Length) ? str : null);
}
/// <summary>
/// Can this word be placed along the vector with out altering any existing letters?
/// </summary>
/// <param name="vec"></param>
/// <param name="str"></param>
/// <returns></returns>
public static bool AnyConflicts(this IWordGrid g, WordVector vec, string str)
{
if (vec.Dir == Dir2D.None)
{
return(true);
}
Point p = vec.Pos;
int len = 0;
while (g.InBounds(p) &&
(len < vec.Length) &&
isSameLetterOrNull(g[p], str[len])
)
{
len++;
p = p.NextPoint(vec.Dir);
}
return((len - 1) == vec.Length);
}
