private bool IsPointOnBlankViewLine()
{
DisplayTextPoint displayTextPoint = _viewPrimitives.Caret;
DisplayTextPoint firstTextColumn = displayTextPoint.GetFirstNonWhiteSpaceCharacterOnViewLine();
return(firstTextColumn.CurrentPosition == displayTextPoint.EndOfViewLine);
}
public override DisplayTextRange GetDisplayTextRange(DisplayTextPoint otherPoint)
{
if (!object.ReferenceEquals(this.TextBuffer, otherPoint.TextBuffer))
{
throw new ArgumentException("The other point must have the same TextBuffer as this one", "otherPoint");
}
return(TextView.GetTextRange(this, otherPoint));
}
public override void MoveToBeginningOfPreviousLine()
{
DisplayTextPoint caret = this.CaretPoint;
caret.MoveToBeginningOfPreviousLine();
this.AdvancedCaret.MoveTo(caret.AdvancedTextPoint);
this.AdvancedCaret.EnsureVisible();
}
public override void MoveToLine(int lineNumber)
{
DisplayTextPoint caretLocation = CaretPoint;
TextView.Selection.Clear();
caretLocation.MoveToLine(lineNumber);
AdvancedCaret.MoveTo(caretLocation.AdvancedTextPoint);
AdvancedCaret.EnsureVisible();
}
public override void MoveToPreviousWord(bool extendSelection)
{
VirtualSnapshotPoint oldCaretPoint = this.AdvancedCaret.Position.VirtualBufferPosition;
DisplayTextPoint caretLocation = CaretPoint;
if (!extendSelection)
{
TextView.AdvancedTextView.Selection.Clear();
}
caretLocation.MoveToPreviousWord();
AdvancedCaret.MoveTo(caretLocation.AdvancedTextPoint);
AdvancedCaret.EnsureVisible();
UpdateSelection(extendSelection, oldCaretPoint);
}
public override bool Show(DisplayTextPoint point, HowToShow howToShow)
{
if (howToShow == HowToShow.AsIs)
{
_textView.ViewScroller.EnsureSpanVisible(new SnapshotSpan(point.AdvancedTextPoint, 0), EnsureSpanVisibleOptions.MinimumScroll);
}
else if (howToShow == HowToShow.Centered)
{
_textView.ViewScroller.EnsureSpanVisible(new SnapshotSpan(point.AdvancedTextPoint, 0), EnsureSpanVisibleOptions.AlwaysCenter);
}
else if (howToShow == HowToShow.OnFirstLineOfView)
{
_textView.DisplayTextLineContainingBufferPosition(point.AdvancedTextPoint, 0.0, ViewRelativePosition.Top);
}
return(point.IsVisible);
}
protected override IEnumerator <DisplayTextPoint> GetDisplayPointEnumeratorInternal()
{
DisplayTextPoint displayTextPoint = GetDisplayStartPoint();
DisplayTextPoint endPoint = GetDisplayEndPoint();
while (displayTextPoint.CurrentPosition <= endPoint.CurrentPosition)
{
yield return(displayTextPoint);
if (displayTextPoint.CurrentPosition == displayTextPoint.AdvancedTextPoint.Snapshot.Length)
{
break;
}
displayTextPoint = displayTextPoint.Clone();
displayTextPoint.MoveToNextCharacter();
}
}
public override void MoveToStartOfLine(bool extendSelection)
{
VirtualSnapshotPoint oldCaretPoint = this.AdvancedCaret.Position.VirtualBufferPosition;
DisplayTextPoint caret = this.CaretPoint;
if ((!this.TextView.Selection.IsEmpty) && !extendSelection)
{
caret = this.TextView.GetTextPoint(this.TextView.Selection.AdvancedSelection.Start.Position);
}
caret.MoveToStartOfLine();
if (!extendSelection)
{
TextView.AdvancedTextView.Selection.Clear();
}
this.AdvancedCaret.MoveTo(caret.AdvancedTextPoint, PositionAffinity.Successor);
this.AdvancedCaret.EnsureVisible();
this.UpdateSelection(extendSelection, oldCaretPoint);
}
public override DisplayTextRange GetDisplayTextRange(DisplayTextPoint otherPoint)
{
return(CaretPoint.GetDisplayTextRange(otherPoint));
}
