internal override Text AppendSimpleText(SimpleText tail)
{
Debug.Assert(tail != null);
Debug.Assert(tail.Length > 0);
Debug.Assert(this.Length > 0);
var text = IsSimpleTextAppendableTo(tail) ?
new ComplexText(
this.texts.Take(this.texts.Count - 1)
.Concat(new[] { this.texts.Last().AppendSimpleText(tail) }),
enableOptimizations: false) :
new ComplexText(
this.texts.Concat(new[] { tail }),
enableOptimizations: false);
var texts = text.texts;
if (texts.Count == 0)
{
return(Text.Empty);
}
if (texts.Count == 1)
{
return(text.texts[0]);
}
return(text);
}
internal override bool IsSimpleTextAppendableTo(SimpleText tail)
{
Debug.Assert(tail != null);
Debug.Assert(tail.Length > 0);
Debug.Assert(this.Length > 0);
return
(object.ReferenceEquals(this.value, tail.value) &&
this.index + this.length == tail.index);
}
public override SplitText Split(int index)
{
if (index < 0 || index > this.length)
{
throw new ArgumentOutOfRangeException("The index is out of the bounds of the Text.");
}
var head = new SimpleText(this.value, this.index, index);
var tail = new SimpleText(this.value, this.index + index, this.length - index);
return(new SplitText(head, tail));
}
internal override bool IsSimpleTextAppendableTo(SimpleText tail)
{
Debug.Assert(tail != null);
Debug.Assert(tail.Length > 0);
Debug.Assert(this.Length > 0);
var lastComponent = this.texts[this.texts.Count - 1] as SimpleText;
return
(lastComponent != null &&
lastComponent.IsSimpleTextAppendableTo(tail));
}
internal override Text AppendSimpleText(SimpleText tail)
{
Debug.Assert(tail != null);
Debug.Assert(tail.Length > 0);
Debug.Assert(this.Length > 0);
if (IsSimpleTextAppendableTo(tail))
{
return(new SimpleText(this.value, this.index, this.length + tail.length));
}
return(Text.Join(this, tail));
}
internal abstract Text AppendSimpleText(SimpleText tail);
internal abstract bool IsSimpleTextAppendableTo(SimpleText tail);