/// <summary>
/// Creates a <see cref="StringSegment"/> structure that represents this string source.
/// </summary>
/// <returns>The <see cref="StringSegment"/> that was created.</returns>
public StringSegment CreateStringSegment()
{
switch (ValueType)
{
case StringSourceUnionValueType.String:
return(StringSource.CreateStringSegment());
case StringSourceUnionValueType.StringBuilder:
return(StringBuilderSource.CreateStringSegment());
case StringSourceUnionValueType.StringSegment:
return(StringSegmentSource.CreateStringSegment());
case StringSourceUnionValueType.ShapedString:
case StringSourceUnionValueType.ShapedStringBuilder:
case StringSourceUnionValueType.ShapedStringSegment:
throw new NotSupportedException();
default:
throw new InvalidOperationException();
}
}
/// <summary>
/// Creates a <see cref="StringSegment"/> structure with the same origin as this
/// string source but a different character range. This method only differs from
/// the <see cref="CreateStringSegmentFromSubstring(Int32, Int32)"/> method if this
/// string source represents a substring of some other, larger string.
/// </summary>
/// <param name="start">The index of the first character in the created segment.</param>
/// <param name="length">The number of characters in the created segment.</param>
/// <returns>The <see cref="StringSegment"/> structure that was created.</returns>
public StringSegment CreateStringSegmentFromSameOrigin(Int32 start, Int32 length)
{
switch (ValueType)
{
case StringSourceUnionValueType.String:
return(StringSource.CreateStringSegmentFromSameOrigin(start, length));
case StringSourceUnionValueType.StringBuilder:
return(StringBuilderSource.CreateStringSegmentFromSameOrigin(start, length));
case StringSourceUnionValueType.StringSegment:
return(StringSegmentSource.CreateStringSegmentFromSameOrigin(start, length));
case StringSourceUnionValueType.ShapedString:
case StringSourceUnionValueType.ShapedStringBuilder:
case StringSourceUnionValueType.ShapedStringSegment:
throw new NotSupportedException();
default:
throw new InvalidOperationException();
}
}
/// <inheritdoc/>
public override Size2 MeasureGlyph(StringBuilder text, Int32 ix)
{
var source = new StringBuilderSource(text);
return(MeasureGlyph(ref source, ix));
}
/// <inheritdoc/>
public override Size2 MeasureString(StringBuilder text, Int32 start, Int32 count)
{
var source = new StringBuilderSource(text);
return(MeasureString(ref source, start, count));
}
/// <inheritdoc/>
public override Size2 MeasureString(StringBuilder text)
{
var source = new StringBuilderSource(text);
return(MeasureString(ref source, 0, text.Length));
}