private List <Rect> CalculateSelectionRects(ICaret caret, ITextComponentWrapper text, Vector2 offset)
{
List <Rect> highlightRects = new List <Rect>();
int start = Mathf.Min(caret.GetIndex(), caret.GetSelectionIndex()) - _drawStart;
start = Mathf.Clamp(start, 0, text.DisplayedTextLength);
int end = Mathf.Max(caret.GetIndex(), caret.GetSelectionIndex()) - _drawStart;
end = Mathf.Clamp(end, 0, text.DisplayedTextLength);
int startLine = text.GetLineByCharIndex(start);
int endLine = text.GetLineByCharIndex(end);
if (startLine == endLine)
{
highlightRects.Add(HightedLineRect(start, end, text.LineHeight(startLine), text));
}
else
{
int currentLineEndIndex = text.LineEndIndex(startLine);
highlightRects.Add(HightedLineRect(start, currentLineEndIndex, text.LineHeight(startLine), text));
while (startLine < endLine - 1)
{
startLine++;
highlightRects.Add(HightedLineRect(
text.LineStartIndex(startLine),
text.LineEndIndex(startLine),
text.LineHeight(startLine),
text));
}
highlightRects.Add(HightedLineRect(
text.LineStartIndex(endLine), end, text.LineHeight(endLine), text));
}
return(highlightRects);
}
protected override string ProcessText(ITextComponentWrapper text, ICaret caret)
{
Vector2 extents = text.DisplayRect.size;
int caretLine = text.GetLineByCharIndex(caret.GetIndex());
if (caret.GetIndex() > _drawEnd)
{
_drawEnd = text.LineEndIndex(caretLine);
float bottomY = text.LineTop(caretLine) - text.LineHeight(caretLine);
// TODO: Remove interline spacing on last line.
int startLine = caretLine;
while (startLine > 0)
{
float topY = text.LineTop(startLine - 1);
if (topY - bottomY > extents.y)
{
break;
}
startLine--;
}
_drawStart = text.LineStartIndex(startLine);
}
else
{
if (caret.GetIndex() < _drawStart)
{
_drawStart = text.LineStartIndex(caretLine);
}
int startLine = text.GetLineByCharIndex(_drawStart);
int endLine = startLine;
float topY = text.LineTop(startLine);
float bottomY = text.LineTop(endLine) - text.LineHeight(endLine);
// TODO: Remove interline spacing on last line.
while (endLine < text.LineCount - 1)
{
bottomY = text.LineTop(endLine + 1) - text.LineHeight(endLine + 1);
// TODO: Remove interline spacing on last line.
if (topY - bottomY > extents.y)
{
break;
}
++endLine;
}
_drawEnd = text.LineEndIndex(endLine);
while (startLine > 0)
{
topY = text.LineTop(startLine - 1);
if (topY - bottomY > extents.y)
{
break;
}
startLine--;
}
_drawStart = text.LineStartIndex(startLine);
}
return(TextValue.Substring(_drawStart, _drawEnd - _drawStart));
}