public UniformStyledTextSection(TextSection Source, TextStyle NormalStyle, TextStyle SelectedStyle)
{
this.Source = Source;
this.NormalStyle = NormalStyle;
this.SelectedStyle = SelectedStyle;
}
public ConcatTextSection(TextSection A, TextSection B)
: base(A.Size + B.Size)
{
this.A = A;
this.B = B;
}
/// <summary>
/// Gets a figure to display the given text section with the given style.
/// </summary>
/// <param name="Line">The index of the line where the text section begins.</param>
/// <param name="Offset">The offset (in cells) of the beginning of the text section from the start of the line.</param>
private static Figure _GetFigure(TextBlockStyle BlockStyle, TextStyle Style, TextSection TextSection, ref int Line, ref int Offset)
{
throw new NotImplementedException();
}
/// <summary>
/// Inserts the given text section into this section at the given position and returns the resulting text section.
/// </summary>
public TextSection Insert(int Position, TextSection Section)
{
if (Position == 0)
return Section + this;
if (Position == this.Size)
return this + Section;
ConcatTextSection cts = this as ConcatTextSection;
if (cts != null)
{
int asize = cts.A.Size;
if (Position <= asize)
return cts.A.Insert(Position, Section) + cts.B;
else
return cts.A + cts.B.Insert(Position, Section);
}
return this.Subsection(0, Position) + Section + this.Subsection(Position, this.Size);
}
/// <summary>
/// Performs initial measurements on a text section to be used in a layout.
/// </summary>
/// <param name="LineIndices">A list to which the indices of line start items should be appened.</param>
/// <param name="Index">The index of the first item in the text section.</param>
/// <param name="Offset">The offset of the start of text section from the beginning of the current line. This will be changed to the
/// offset of the end of the text section from the beginning of the latest line.</param>
/// <param name="Width">The lower bound on the line width needed to contain the text section.</param>
private static void _Measure(TextBlockStyle Style, TextSection Section, int Index, List<int> LineIndices, ref int Offset, ref int Width)
{
TextItem ti = Section as TextItem;
if (ti != null)
{
if (ti == LineStartTextItem.Instance)
{
Offset = 0;
LineIndices.Add(Index);
return;
}
_AppendLine(Style, ti, ref Offset);
Width = Math.Max(Width, Offset);
return;
}
ConcatTextSection cts = Section as ConcatTextSection;
if (cts != null)
{
_Measure(Style, cts.A, Index, LineIndices, ref Offset, ref Width);
_Measure(Style, cts.B, Index + cts.A.Size, LineIndices, ref Offset, ref Width);
}
}
