/// <summary>
/// Construct a text trailing word ellipsis collapsing properties
/// </summary>
/// <param name="width">width in which collapsing is constrained to</param>
/// <param name="textRunProperties">text run properties of ellispis symbol</param>
public TextTrailingWordEllipsis(
double width,
TextRunProperties textRunProperties
)
{
Width = width;
Symbol = new TextCharacters(s_ellipsis, textRunProperties);
}
/// <summary>
/// Construct a text trailing word ellipsis collapsing properties.
/// </summary>
/// <param name="ellipsis">Text used as collapsing symbol.</param>
/// <param name="width">width in which collapsing is constrained to.</param>
/// <param name="textRunProperties">text run properties of ellipsis symbol.</param>
public TextTrailingWordEllipsis(
ReadOnlySlice <char> ellipsis,
double width,
TextRunProperties textRunProperties
)
{
Width = width;
Symbol = new TextCharacters(ellipsis, textRunProperties);
}
/// <summary>
/// Fetches text runs.
/// </summary>
/// <param name="textSource">The text source.</param>
/// <param name="firstTextSourceIndex">The first text source index.</param>
/// <param name="endOfLine"></param>
/// <param name="textRange"></param>
/// <returns>
/// The formatted text runs.
/// </returns>
private static List <TextCharacters> FetchTextRuns(ITextSource textSource, int firstTextSourceIndex,
out TextEndOfLine?endOfLine, out TextRange textRange)
{
var length = 0;
endOfLine = null;
var textRuns = new List <TextCharacters>();
var textRunEnumerator = new TextRunEnumerator(textSource, firstTextSourceIndex);
while (textRunEnumerator.MoveNext())
{
var textRun = textRunEnumerator.Current;
if (textRun == null)
{
break;
}
switch (textRun)
{
case TextCharacters textCharacters:
{
if (TryGetLineBreak(textCharacters, out var runLineBreak))
{
var splitResult = new TextCharacters(textCharacters.Text.Take(runLineBreak.PositionWrap),
textCharacters.Properties);
textRuns.Add(splitResult);
length += runLineBreak.PositionWrap;
textRange = new TextRange(firstTextSourceIndex, length);
return(textRuns);
}
textRuns.Add(textCharacters);
break;
}
case TextEndOfLine textEndOfLine:
endOfLine = textEndOfLine;
break;
}
length += textRun.Text.Length;
}
textRange = new TextRange(firstTextSourceIndex, length);
return(textRuns);
}
/// <summary>
/// Construct a text trailing word ellipsis collapsing properties.
/// </summary>
/// <param name="ellipsis">Text used as collapsing symbol.</param>
/// <param name="prefixLength">Length of leading prefix.</param>
/// <param name="width">width in which collapsing is constrained to</param>
/// <param name="textRunProperties">text run properties of ellispis symbol</param>
public TextLeadingPrefixCharacterEllipsis(
ReadOnlySlice <char> ellipsis,
int prefixLength,
double width,
TextRunProperties textRunProperties)
{
if (_prefixLength < 0)
{
throw new ArgumentOutOfRangeException(nameof(prefixLength));
}
_prefixLength = prefixLength;
Width = width;
Symbol = new TextCharacters(ellipsis, textRunProperties);
}
