void OnBufferTextDataChanged(object sender, TextDataChangedEventArgs e)
{
bool updatedAtLeastOnce = false;
while (this.change.NextChange != null)
{
bool updated;
this.Range = this.change.NextChange.ApplyTo(this.Range, out updated);
this.change = this.change.NextChange;
if (updated)
{
updatedAtLeastOnce = true;
}
}
if (updatedAtLeastOnce)
{
var handler = this.RangeChanged;
if (handler != null)
{
handler(this, EventArgs.Empty);
}
}
}
void OnPencilDisposed(Pencil pencil, TextDataChangedEventArgs args)
{
Debug.Assert(pencil == this.activePencil, "Disposing a pencil that isn't the active one.");
if (args != null)
{
if (this.LastChange != null)
{
this.LastChange.NextChange = args.Change;
}
TextChange finalChange = args.Change;
while (finalChange.NextChange != null)
{
finalChange = finalChange.NextChange;
}
this.TextData = finalChange.NewTextData;
this.LastChange = finalChange;
var handler = this.TextDataChanged;
if (handler != null)
{
handler(this, args);
}
if (pencil.UndoUnit != null)
{
var now = DateTime.Now;
bool merged = false;
if (((now - this.timeOfLastEdit).TotalMilliseconds < MinimumMillisecondsTimeBetweenUndoUnits) && (this.undoStack.Count > 0))
{
// If possible, merge this unit with the one on the stack.
TextUndoUnit existingUnit = this.undoStack.Peek();
TextUndoUnit incomingUnit = pencil.UndoUnit;
if (incomingUnit.Metadata != null && incomingUnit.Metadata.TryMerge(existingUnit.Metadata))
{
// Successful merge
existingUnit.Metadata = incomingUnit.Metadata;
existingUnit.Merge(pencil.UndoUnit);
merged = true;
}
}
if (!merged)
{
this.undoStack.Push(pencil.UndoUnit);
}
this.redoStack.Clear();
this.timeOfLastEdit = now;
}
}
this.activePencil = null;
this.pencilEvent.Set();
}
protected override void OnBufferTextDataChanged(object sender, TextDataChangedEventArgs e)
{
var change = e.Change;
while (change.NextChange != null)
{
// We actually need the last change; we're "as of" that change.
change = change.NextChange;
}
StartNewParse(change);
}
protected virtual void OnBufferTextDataChanged(object sender, TextDataChangedEventArgs e)
{
}