public override void OnPaintBackground(IGUIContext ctx, RectangleF bounds)
{
base.OnPaintBackground(ctx, bounds);
try {
if (BreakWidthRulerVisible && Padding.Right > 0)
{
int breakWidth = (int)(bounds.Left + Padding.Left + BreakWidth);
ctx.DrawLine(Theme.Pens.Base01, breakWidth, bounds.Top, breakWidth, bounds.Bottom);
}
painter.Value.Clear();
if (SelLength <= 0)
{
return;
}
int Start = SelStart;
int End = Start + SelLength;
int paraIndexEnd = RowManager.FindParagraphIndexByPosition(End);
int firstParagraphIndex = RowManager.FirstParagraphOnScreen;
if (firstParagraphIndex > paraIndexEnd)
{
return;
}
int rowHeight = RowManager.LineHeight;
float rowBorder = 1f * ScaleFactor;
Paragraph paraStart;
ParagraphPosition ppStart;
int paraIndex = RowManager.FindParagraphIndexByPosition(Start);
int lineOffset = 0;
if (paraIndex >= firstParagraphIndex)
{
paraStart = RowManager.Paragraphs [paraIndex];
ppStart = paraStart.PositionAtIndex(Start - paraStart.PositionOffset);
lineOffset = ppStart.LineIndex;
}
else
{
paraIndex = firstParagraphIndex;
paraStart = RowManager.Paragraphs [paraIndex];
lineOffset = firstParagraphIndex - paraStart.LineOffset;
ppStart = paraStart.PositionAtIndex(0);
}
Paragraph paraEnd = RowManager.Paragraphs[paraIndexEnd];
ParagraphPosition ppEnd = paraEnd.PositionAtIndex(End - paraEnd.PositionOffset);
int absline = paraStart.LineOffset + ppStart.LineIndex;
int absEndLine = paraEnd.LineOffset + ppEnd.LineIndex;
float xStart = ppStart.ColumnStart + bounds.Left + Padding.Left;
float yStart = bounds.Top + Padding.Top + (absline * rowHeight) + ScrollOffsetY;
float xEnd = 0;
if (absline == absEndLine)
{
xEnd = ppEnd.ColumnStart + bounds.Left + Padding.Left;
painter.Value.AddRectangle(SelectionBrush, xStart, yStart, xEnd - xStart, rowHeight - rowBorder);
// >>> Paint end exit ,,
painter.Value.Flush();
return;
}
float startWidth = ppStart.ColumnStart;
while (absline <= absEndLine)
{
foreach (float w in paraStart.LineWidths().Skip(lineOffset))
{
if (absline++ == absEndLine || yStart > bounds.Bottom)
{
startWidth = ppEnd.ColumnStart;
painter.Value.AddRectangle(SelectionBrush, xStart, yStart, startWidth, rowHeight - rowBorder);
// >>> Paint end exit ,,
painter.Value.Flush();
return;
}
if (yStart + rowHeight > bounds.Top && yStart < bounds.Bottom)
{
painter.Value.AddRectangle(SelectionBrush, xStart, yStart, w - startWidth, rowHeight - rowBorder);
}
yStart += rowHeight;
startWidth = 0;
xStart = bounds.Left + Padding.Left;
}
paraIndex++;
if (paraIndex >= RowManager.Paragraphs.Count)
{
break;
}
paraStart = RowManager.Paragraphs[paraIndex];
lineOffset = 0;
}
} catch (Exception ex) {
ex.LogWarning();
}
}