/// <summary>
/// Mutate the array of line break locations until an optimal solution is found.
/// No line breaks are added or deleted, they are simply moved around.
/// </summary>
/// <param name="words">Array of each word.</param>
/// <param name="wordBreaks">Array of line breaks.</param>
/// <param name="limit">Width to wrap each line.</param>
/// <returns>New array of optimal line breaks.</returns>
private static JsArray <bool?> wrapMutate_(string[] words, JsArray <bool?> wordBreaks, int limit)
{
var bestScore = Core.utils.wrapScore_(words, wordBreaks, limit);
JsArray <bool?> bestBreaks = null;
// Try shifting every line break forward or backward.
for (var i = 0; i < wordBreaks.Length - 1; i++)
{
if (wordBreaks[i] == wordBreaks[i + 1])
{
continue;
}
var mutatedWordBreaks = new JsArray <bool?>();
wordBreaks.ForEach((a) => mutatedWordBreaks.Push(a));
mutatedWordBreaks[i] = !mutatedWordBreaks[i];
mutatedWordBreaks[i + 1] = !mutatedWordBreaks[i + 1];
var mutatedScore =
Core.utils.wrapScore_(words, mutatedWordBreaks, limit);
if (mutatedScore > bestScore)
{
bestScore = mutatedScore;
bestBreaks = mutatedWordBreaks;
}
}
if (bestBreaks != null)
{
// Found an improvement. See if it may be improved further.
return(Core.utils.wrapMutate_(words, bestBreaks, limit));
}
// No improvements found. Done.
return(wordBreaks);
}