public void Select(Guid id, int selectionStartOffset, int selectionEndOffset)
{
if (Selections.Count == 0)
{
return;
}
if (selectionStartOffset == 0 && selectionEndOffset == 0)
{
Selections[id].Lines = null;
return;
}
TextLocation start, end;
if (selectionStartOffset < selectionEndOffset)
{
start = Editor.Document.GetLocation(selectionStartOffset);
end = Editor.Document.GetLocation(selectionEndOffset);
}
else
{
start = Editor.Document.GetLocation(selectionEndOffset);
end = Editor.Document.GetLocation(selectionStartOffset);
}
var lines = new List <LineSelection>();
if (start.Line == end.Line)
{
//just get that one rectangle
var startPos = GetVisualPosition(start);
var endPos = GetVisualPosition(end);
int width = (int)(endPos.X - startPos.X);
lines.Add(new LineSelection(width, startPos, Selections[id].Color));
}
else
{
//first line
var topStartPos = GetVisualPosition(start);
var topEndPos = GetVisualPosition(Editor.Document.Lines[start.Line - 1].EndOffset);
int topWidth = (int)(topEndPos.X - topStartPos.X);
lines.Add(new LineSelection(topWidth, topStartPos, Selections[id].Color));
//last line
var bottomStartPos = GetVisualPosition(Editor.Document.Lines[end.Line - 1].Offset);
var bottomEndPos = GetVisualPosition(end);
int bottomWidth = (int)(bottomEndPos.X - bottomStartPos.X);
lines.Add(new LineSelection(bottomWidth, bottomStartPos, Selections[id].Color));
for (int i = start.Line; i < end.Line - 1; i++)
{
int offset = Editor.TextArea.Document.Lines[i].Offset;
int endOffset = Editor.TextArea.Document.Lines[i].EndOffset;
var lineStart = GetVisualPosition(offset);
var lineEnd = GetVisualPosition(endOffset);
int width = (int)(lineEnd.X - lineStart.X);
var lineSelection = new LineSelection(width, lineStart, Selections[id].Color);
lines.Add(lineSelection);
}
}
Selections[id].Lines = lines;
}
private static void AdjustLine(LineSelection line)
{
Canvas.SetLeft(line.Box, line.Position.X);
Canvas.SetTop(line.Box, line.Position.Y);
}
