private void CombineChunks(int chunkIndex, DocumentChunk chunk)
{
if (chunkIndex > 0)
{
if (chunks[chunkIndex - 1].IsTooShort)
{
chunks[chunkIndex - 1].Append(chunk);
chunks.RemoveAt(chunkIndex);
chunkIndex--;
chunk = chunks[chunkIndex];
updatedToChunkIndex = Math.Min(updatedToChunkIndex, chunkIndex);
}
}
if (!chunk.IsTooShort)
{
return;
}
if (chunkIndex < chunks.Count - 1)
{
if (chunks[chunkIndex + 1].IsTooShort)
{
chunk.Append(chunks[chunkIndex + 1]);
chunks.RemoveAt(chunkIndex + 1);
}
}
}
public void AddAt(string text, Cindex cindex)
{
int chunkIndex = GetChunkIndexByCindex(cindex);
DocumentChunk chunk = chunks[chunkIndex];
chunk.InsertText(text, cindex);
updatedToChunkIndex = Math.Min(updatedToChunkIndex, chunkIndex);
CheckChunkLength(chunkIndex, chunk);
}
public char this[int cindex]
{
get
{
int chunkIndex = GetChunkIndexByCindex(cindex);
DocumentChunk chunk = chunks[chunkIndex];
return(chunk[cindex]);
}
}
private int RemoveAtPartial(Cindex cindex, int length)
{
int chunkIndex = GetChunkIndexByCindex(cindex);
DocumentChunk chunk = chunks[chunkIndex];
int availableLength = Math.Min(length, chunk.End + 1 - cindex);
if (availableLength == 0)
{
return(0);
}
chunk.RemoveText(cindex, availableLength);
updatedToChunkIndex = chunkIndex;
CheckChunkLength(chunkIndex, chunk);
return(length - availableLength);
}
private void SplitChunk(int chunkIndex, DocumentChunk chunk)
{
List <DocumentChunk> chunksToCheck = new List <DocumentChunk>();
while (chunk.IsTooLong)
{
DocumentChunk secondChunk = chunk.Halve();
chunks.Insert(chunkIndex + 1, secondChunk);
chunksToCheck.Add(secondChunk);
}
foreach (DocumentChunk chunkToCheck in chunksToCheck)
{
SplitChunk(chunks.IndexOf(chunkToCheck), chunkToCheck);
}
}
/* private DocumentChunk GetChunkByCindex(Cindex cindex)
* {
* UpdateChunksToCindex(cindex);
* foreach(DocumentChunk chunk in chunks)
* {
* if(chunk.Start >= cindex && chunk.End <= cindex)
* return chunk;
* }
* if(cindex == Length)
* return chunks.Last();
* throw new Exception(String.Format("Cindex {0} not found in DocumentChunkCollection of length {1}.", cindex, Length));
* } */
private void CheckChunkLength(int chunkIndex, DocumentChunk chunk)
{
if (chunk.IsEmpty)
{
if (chunks.Count > 1)
{
chunks.RemoveAt(chunkIndex);
updatedToChunkIndex--;
}
}
else if (chunk.IsTooLong)
{
SplitChunk(chunkIndex, chunk);
}
else if (chunk.IsTooShort)
{
CombineChunks(chunkIndex, chunk);
}
}
