static void MoveCaret(TextArea textArea, CaretMovementType direction)
{
DocumentLine caretLine = textArea.Document.GetLineByNumber(textArea.Caret.Line);
VisualLine visualLine = textArea.TextView.GetOrConstructVisualLine(caretLine);
TextViewPosition caretPosition = textArea.Caret.Position;
TextLine textLine = visualLine.GetTextLine(caretPosition.VisualColumn);
switch (direction)
{
case CaretMovementType.CharLeft:
MoveCaretLeft(textArea, caretPosition, visualLine, CaretPositioningMode.Normal);
break;
case CaretMovementType.CharRight:
MoveCaretRight(textArea, caretPosition, visualLine, CaretPositioningMode.Normal);
break;
case CaretMovementType.WordLeft:
MoveCaretLeft(textArea, caretPosition, visualLine, CaretPositioningMode.WordStart);
break;
case CaretMovementType.WordRight:
MoveCaretRight(textArea, caretPosition, visualLine, CaretPositioningMode.WordStart);
break;
case CaretMovementType.LineUp:
case CaretMovementType.LineDown:
case CaretMovementType.PageUp:
case CaretMovementType.PageDown:
MoveCaretUpDown(textArea, direction, visualLine, textLine, caretPosition.VisualColumn);
break;
case CaretMovementType.DocumentStart:
SetCaretPosition(textArea, 0, 0);
break;
case CaretMovementType.DocumentEnd:
SetCaretPosition(textArea, -1, textArea.Document.TextLength);
break;
case CaretMovementType.LineStart:
MoveCaretToStartOfLine(textArea, visualLine);
break;
case CaretMovementType.LineEnd:
MoveCaretToEndOfLine(textArea, visualLine);
break;
default:
throw new NotSupportedException(direction.ToString());
}
}
int GetTextLineIndexFromOffset(List <TextLine> textLines, int offset)
{
int lineNumber = TextView.Document.GetLineByOffset(offset).LineNumber;
VisualLine vl = TextView.GetVisualLine(lineNumber);
if (vl != null)
{
int relOffset = offset - vl.FirstDocumentLine.Offset;
TextLine line = vl.GetTextLine(vl.GetVisualColumn(relOffset));
return(textLines.IndexOf(line));
}
return(-1);
}
Rect CalcCaretRectangle(VisualLine visualLine)
{
if (!visualColumnValid)
{
RevalidateVisualColumn(visualLine);
}
TextLine textLine = visualLine.GetTextLine(position.VisualColumn);
double xPos = textLine.GetDistanceFromCharacterHit(new CharacterHit(position.VisualColumn, 0));
double lineTop = visualLine.GetTextLineVisualYPosition(textLine, VisualYPosition.TextTop);
double lineBottom = visualLine.GetTextLineVisualYPosition(textLine, VisualYPosition.LineBottom);
return(new Rect(xPos,
lineTop,
SystemParameters.CaretWidth,
lineBottom - lineTop));
}
