public void MouseDrag(Point P)
{
DocumentLocation dl;
if (P.Y < 0 || P.Y > textArea.Bottom)
{
lastMouseDragPoint = P;
if (!dragDelayOK)
{
return;
}
dragDelayOK = false;
DocumentLocation dl2 = (selectAnchor == Selection.Start) ? Selection.End : Selection.Start;
int l = dl2.LineNumber;
int sl = doc[l].SubLineNum(dl2.ColumnNumber);
if (doc.Offset((P.Y < 0 ? -1 : 1), ref l, ref sl))
{
dl = new DocumentLocation(l, doc[l].SubLineStart(sl) + Math.Min(doc[l].GetSubLines(false)[sl].Length, doc.XCoord(dl2)));
}
else
{
return;
}
Clock.Update(ref mouseDragTimer, makeDragDelayOK, OFF_SCREEN_DRAG_DELAY, false);
}
else
{
if (mouseDragTimer != Clock.NULL_ALARM)
{
Clock.RemoveAlarm(mouseDragTimer);
}
mouseDragTimer = Clock.NULL_ALARM;
dragDelayOK = true;
dl = getDocLocFromScreenXY(getScreenXYFromPixel(P));
}
if (selectAnchor == null)
{
if (dragging)
{
CaretDocLoc = dl;
setCaretLocation(true);
}
else if (!Selection.IsEmpty && Selection.Contains(dl))
{
dragging = true;
CaretDocLoc = dl;
setCaretLocation(true);
parent.Cursor = Cursors.Hand;
dragDelayOK = true;
}
else
{
dragDelayOK = true;
selectAnchor = dl;
}
}
else
{
Selection = new DocumentRange(selectAnchor, dl);
if (!Selection.IsEmpty)
{
CaretDocLoc = (Selection.Start == selectAnchor) ? Selection.End : Selection.Start;
setCaretLocation(true);
}
}
setCaretLocation(true);
parent.Invalidate();
}
public void MakeVisible(DocumentRange DR)
{
makeVisible(DR.End);
makeVisible(DR.Start);
}
public DocumentRange EnsureValid(DocumentRange DR)
{
return(new DocumentRange(EnsureValid(DR.Start), EnsureValid(DR.End)));
}
private void move(MoveType MoveType, bool Select)
{
DocumentLocation old = CaretDocLoc;
if (!Select)
{
Selection = DocumentRange.Empty;
}
undoManager.ClosePackage();
switch (MoveType)
{
case MoveType.Left:
CaretDocLoc = doc.GetPreviousVisibleLocation(CaretDocLoc);
break;
case MoveType.Right:
CaretDocLoc = doc.GetNextVisibleLocation(CaretDocLoc);
break;
case MoveType.Up:
if (CaretXY == invalidXY)
{
setCaretLocation(true);
}
CaretDocLoc = getDocLocFromScreenXY(new Point(PreferredX, CaretXY.Y - 1));
break;
case MoveType.Down:
if (CaretXY == invalidXY)
{
setCaretLocation(true);
}
CaretDocLoc = getDocLocFromScreenXY(new Point(PreferredX, CaretXY.Y + 1));
break;
case MoveType.RightWord:
CaretDocLoc = doc.GetNextWord(CaretDocLoc);
break;
case MoveType.LeftWord:
CaretDocLoc = doc.GetPreviousWord(CaretDocLoc);
break;
case MoveType.Home:
Line l = doc[CaretDocLoc.LineNumber];
int sln = l.SubLineNum(caretDocLoc.ColumnNumber);
int x = l.GetSubLines(false)[sln].FirstNonWSChar();
if (CaretDocLoc.ColumnNumber == 0 && x > 0)
{
CaretDocLoc = new DocumentLocation(CaretDocLoc.LineNumber, x);
}
else if (x > 0 && x < CaretDocLoc.ColumnNumber - l.BeginningOfSubLine(sln))
{
CaretDocLoc = new DocumentLocation(CaretDocLoc.LineNumber, x + l.BeginningOfSubLine(sln));
}
else
{
CaretDocLoc = new DocumentLocation(CaretDocLoc.LineNumber, l.BeginningOfSubLine(sln));
}
break;
case MoveType.End:
CaretDocLoc = new DocumentLocation(CaretDocLoc.LineNumber, doc[CaretDocLoc.LineNumber].EndOfSubLine(doc[CaretDocLoc.LineNumber].SubLineNum(CaretDocLoc.ColumnNumber)));
break;
case MoveType.PageUp:
if (CaretXY.X < 0)
{
makeVisible(CaretDocLoc);
}
{
Point p = CaretXY;
p.X = PreferredX;
if (!offset(-NumVisibleLines))
{
p.Y = 0;
}
CaretDocLoc = getDocLocFromScreenXY(p);
}
break;
case MoveType.PageDown:
if (CaretXY.X < 0)
{
makeVisible(CaretDocLoc);
}
{
Point p = CaretXY;
p.X = PreferredX;
if (offset(NumVisibleLines))
{
CaretDocLoc = getDocLocFromScreenXY(p);
}
else
{
CaretDocLoc = new DocumentLocation(doc, doc.NumLines - 1, doc[doc.NumLines - 1].NumVisibleSubLines - 1, PreferredX);
}
}
break;
}
if (Select)
{
if (selectionAnchor == null)
{
selectionAnchor = old;
}
Selection = new DocumentRange(selectionAnchor, CaretDocLoc);
}
setCaretLocation(true);
parent.Invalidate();
}
static DocumentRange()
{
Empty = new DocumentRange(DocumentLocation.BOF, DocumentLocation.BOF);
}
