/// <summary>
/// Finds all segments that overlap with the given segment (including touching segments).
/// Segments are returned in the order given by GetNextSegment/GetPreviousSegment.
/// </summary>
/// <returns>Returns a new collection containing the results of the query.
/// This means it is safe to modify the TextSegmentCollection while iterating through the result collection.</returns>
public ReadOnlyCollection<T> FindOverlappingSegments(int offset, int length)
{
ThrowUtil.CheckNotNegative(length, "length");
List<T> results = new List<T>();
if (root != null) {
FindOverlappingSegments(results, root, offset, offset + length);
}
return results.AsReadOnly();
}
/// <summary>
/// Creates a new OffsetChangeMapEntry instance.
/// </summary>
public OffsetChangeMapEntry(int offset, int removalLength, int insertionLength)
{
ThrowUtil.CheckNotNegative(offset, "offset");
ThrowUtil.CheckNotNegative(removalLength, "removalLength");
ThrowUtil.CheckNotNegative(insertionLength, "insertionLength");
this.offset = offset;
this.removalLength = removalLength;
this.insertionLength = insertionLength;
}
/// <summary>
/// Creates a new OffsetChangeMapEntry instance.
/// </summary>
public OffsetChangeMapEntry(int offset, int removalLength, int insertionLength)
{
ThrowUtil.CheckNotNegative(offset, "offset");
ThrowUtil.CheckNotNegative(removalLength, "removalLength");
ThrowUtil.CheckNotNegative(insertionLength, "insertionLength");
this.offset = offset;
this.removalLengthWithDeletionFlag = (uint)removalLength;
this.insertionLengthWithMovementFlag = (uint)insertionLength;
}
/// <summary>
/// Gets the visual column from a document offset relative to the first line start.
/// </summary>
public int GetVisualColumn(int relativeTextOffset)
{
ThrowUtil.CheckNotNegative(relativeTextOffset, "relativeTextOffset");
foreach (VisualLineElement element in elements)
{
if (element.RelativeTextOffset <= relativeTextOffset &&
element.RelativeTextOffset + element.DocumentLength >= relativeTextOffset)
{
return(element.GetVisualColumn(relativeTextOffset));
}
}
return(VisualLength);
}
/// <summary>
/// Gets the document offset (relative to the first line start) from a visual column.
/// </summary>
public int GetRelativeOffset(int visualColumn)
{
ThrowUtil.CheckNotNegative(visualColumn, "visualColumn");
int documentLength = 0;
foreach (VisualLineElement element in elements)
{
if (element.VisualColumn <= visualColumn &&
element.VisualColumn + element.VisualLength > visualColumn)
{
return(element.GetRelativeOffset(visualColumn));
}
documentLength += element.DocumentLength;
}
return(documentLength);
}
/// <summary>
/// Creates a new DocumentChangeEventArgs object.
/// </summary>
public DocumentChangeEventArgs(int offset, string removedText, string insertedText, OffsetChangeMap offsetChangeMap)
{
ThrowUtil.CheckNotNegative(offset, "offset");
ThrowUtil.CheckNotNull(removedText, "removedText");
ThrowUtil.CheckNotNull(insertedText, "insertedText");
Offset = offset;
RemovedText = removedText;
InsertedText = insertedText;
if (offsetChangeMap != null)
{
if (!offsetChangeMap.IsFrozen)
{
throw new ArgumentException("The OffsetChangeMap must be frozen before it can be used in DocumentChangeEventArgs");
}
if (!offsetChangeMap.IsValidForDocumentChange(offset, removedText.Length, insertedText.Length))
{
throw new ArgumentException("OffsetChangeMap is not valid for this document change", nameof(offsetChangeMap));
}
this.offsetChangeMap = offsetChangeMap;
}
}
