internal void FireModified(NativeScintillaEventArgs ea)
{
// First we fire the INativeScintilla Modified event.
if(Events[_modifiedEventKey] != null)
((EventHandler<NativeScintillaEventArgs>)Events[_modifiedEventKey])(this, ea);
// Now we use raw information from the Modified event to construct
// some more user friendly Events to fire.
SCNotification scn = ea.SCNotification;
int modType = scn.modificationType;
if((modType & TEXT_MODIFIED_FLAGS) > 0)
{
TextModifiedEventArgs mea = new TextModifiedEventArgs
(
modType,
(modType | Constants.SC_PERFORMED_USER) > 0,
scn.line,
scn.position,
scn.length,
scn.linesAdded,
Utilities.PtrToStringUtf8(scn.text, scn.length)
);
// These messages all get fired seperately hence the if else ifs
if((modType & Constants.SC_MOD_BEFOREDELETE) > 0)
OnBeforeTextDelete(mea);
else if((modType & Constants.SC_MOD_BEFOREINSERT) > 0)
OnBeforeTextInsert(mea);
else if((modType & Constants.SC_MOD_DELETETEXT) > 0)
OnTextDeleted(mea);
else if((modType & Constants.SC_MOD_INSERTTEXT) > 0)
OnTextInserted(mea);
}
else if((modType & Constants.SC_MOD_CHANGEFOLD) > 0)
{
FoldChangedEventArgs fea = new FoldChangedEventArgs(scn.line, scn.foldLevelNow, scn.foldLevelPrev, scn.modificationType);
OnFoldChanged(fea);
}
else if((modType & Constants.SC_MOD_CHANGESTYLE) > 0)
{
StyleChangedEventArgs sea = new StyleChangedEventArgs(scn.position, scn.length, scn.modificationType);
OnStyleChanged(sea);
}
else if((modType & Constants.SC_MOD_CHANGEMARKER) > 0)
{
MarkerChangedEventArgs mea = new MarkerChangedEventArgs(scn.line, scn.modificationType);
OnMarkerChanged(mea);
}
OnDocumentChange(ea);
}
protected virtual void OnBeforeTextInsert(TextModifiedEventArgs e)
{
List<ManagedRange> offsetRanges = new List<ManagedRange>();
foreach (ManagedRange mr in _managedRanges)
{
if (mr.Start == e.Position && mr.PendingDeletion)
{
mr.PendingDeletion = false;
ManagedRange lmr = mr;
BeginInvoke(new MethodInvoker(delegate() { lmr.Change(e.Position, e.Position + e.Length); }));
}
// If the Range is a single point we treat it slightly
// differently than a spanned range
if (mr.IsPoint)
{
// Unlike a spanned range, if the insertion point of
// the new text == the start of the range (and thus
// the end as well) we offset the entire point.
if (mr.Start >= e.Position)
mr.Change(mr.Start + e.Length, mr.End + e.Length);
else if (mr.End >= e.Position)
mr.Change(mr.Start, mr.End + e.Length);
}
else
{
// We offset a spanned range entirely only if the
// start occurs after the insertion point of the new
// text.
if (mr.Start > e.Position)
mr.Change(mr.Start + e.Length, mr.End + e.Length);
else if (mr.End >= e.Position)
{
// However it the start of the range == the insertion
// point of the new text instead of offestting the
// range we expand it.
mr.Change(mr.Start, mr.End + e.Length);
}
}
}
if (Events[_beforeTextInsertEventKey] != null)
((EventHandler<TextModifiedEventArgs>)Events[_beforeTextInsertEventKey])(this, e);
}
protected virtual void OnTextInserted(TextModifiedEventArgs e)
{
if (Events[_textInsertedEventKey] != null)
((EventHandler<TextModifiedEventArgs>)Events[_textInsertedEventKey])(this, e);
}
protected virtual void OnBeforeTextDelete(TextModifiedEventArgs e)
{
int firstPos = e.Position;
int lastPos = firstPos + e.Length;
List<ManagedRange> deletedRanges = new List<ManagedRange>();
foreach (ManagedRange mr in _managedRanges)
{
// These ranges lie within the deleted range so
// the ranges themselves need to be deleted
if (mr.Start >= firstPos && mr.End <= lastPos)
{
// If the entire range is being delete and NOT a superset of the range,
// don't delete it, only collapse it.
if (!mr.IsPoint && e.Position == mr.Start && (e.Position + e.Length == mr.End))
{
mr.Change(mr.Start, mr.Start);
}
else
{
// Notify the virtual Range that it needs to cleanup
mr.Change(-1, -1);
// Mark for deletion after this foreach:
deletedRanges.Add(mr);
}
}
else if (mr.Start >= lastPos)
{
// These ranges are merely offset by the deleted range
mr.Change(mr.Start - e.Length, mr.End - e.Length);
}
else if (mr.Start >= firstPos && mr.Start <= lastPos)
{
// The left side of the managed range is getting
// cut off
mr.Change(firstPos, mr.End - e.Length);
}
else if (mr.Start < firstPos && mr.End >= firstPos && mr.End >= lastPos)
{
mr.Change(mr.Start, mr.End - e.Length);
}
else if (mr.Start < firstPos && mr.End >= firstPos && mr.End < lastPos)
{
mr.Change(mr.Start, firstPos);
}
}
foreach (ManagedRange mr in deletedRanges)
mr.Dispose();
if (Events[_beforeTextDeleteEventKey] != null)
((EventHandler<TextModifiedEventArgs>)Events[_beforeTextDeleteEventKey])(this, e);
}