/// <summary>
/// Adds pattern match highlights to an area group before it is rendered
/// </summary>
protected virtual void BeforeRender(AreaGroup ag)
{
if (!active)
{
return;
}
Util.Range sel = ag.Selection;
if (sel.IsEmpty() || sel.Size > 512)
{
return;
}
int nrows;
Util.Range view = ag.GetViewRange(out nrows);
findStrategy.Buffer = ag.Buffer;
findStrategy.Position = view.Start;
findStrategy.Pattern = ag.Buffer.RangeToByteArray(sel);
// Merge overlapping matches
Util.Range match;
Util.Range currentHighlight = new Util.Range();
while ((match = findStrategy.FindNext(view.End)) != null)
{
if (currentHighlight.End >= match.Start)
{
currentHighlight.End = match.End;
}
else
{
ag.AddHighlight(currentHighlight.Start, currentHighlight.End, Drawer.HighlightType.PatternMatch);
currentHighlight = match;
}
}
ag.AddHighlight(currentHighlight.Start, currentHighlight.End, Drawer.HighlightType.PatternMatch);
}
protected override void DoOperation()
{
match = strategy.FindNext();
}