public override void MoveToEndOfViewLine(bool extendSelection)
{
VirtualSnapshotPoint oldCaretPoint = this.AdvancedCaret.Position.VirtualBufferPosition;
SnapshotPoint selectionEnd = this.TextView.Selection.AdvancedSelection.End.Position;
bool selectionIsEmpty = TextView.Selection.IsEmpty;
if (!extendSelection)
{
TextView.AdvancedTextView.Selection.Clear();
}
if (!selectionIsEmpty && !extendSelection)
{
var selectionEndLine = this.TextView.AdvancedTextView.GetTextViewLineContainingBufferPosition(selectionEnd);
AdvancedCaret.MoveTo(selectionEndLine.End, PositionAffinity.Predecessor);
}
else
{
ITextViewLine line = this.AdvancedCaret.ContainingTextViewLine;
AdvancedCaret.MoveTo(line.End, line.IsLastTextViewLineForSnapshotLine ? PositionAffinity.Successor : PositionAffinity.Predecessor);
}
AdvancedCaret.EnsureVisible();
UpdateSelection(extendSelection, oldCaretPoint);
}
public override void MoveToNextCharacter(bool extendSelection)
{
VirtualSnapshotPoint oldCaretPoint = this.AdvancedCaret.Position.VirtualBufferPosition;
TextPoint endPoint = TextView.Selection.GetEndPoint();
bool selectionIsEmpty = TextView.Selection.IsEmpty;
if (!extendSelection)
{
TextView.AdvancedTextView.Selection.Clear();
}
// If the selection is not empty, VS clears the selection and sets
// the caret at the end of the selection (regardless of it were reversed or not)
if (!extendSelection && !selectionIsEmpty)
{
MoveTo(endPoint.CurrentPosition);
}
else
{
AdvancedCaret.MoveToNextCaretPosition();
}
AdvancedCaret.EnsureVisible();
UpdateSelection(extendSelection, oldCaretPoint);
}
public override bool DeletePrevious()
{
if (TextView.Selection.IsEmpty)
{
if (AdvancedCaret.InVirtualSpace)
{
AdvancedCaret.MoveToPreviousCaretPosition();
}
else
{
if (!CaretPoint.DeletePrevious())
{
return(false);
}
if (AdvancedCaret.InVirtualSpace)
{
AdvancedCaret.MoveTo(AdvancedCaret.Position.BufferPosition);
}
}
}
else
{
if (!TextView.Selection.Delete())
{
return(false);
}
}
AdvancedCaret.EnsureVisible();
return(true);
}
public override void MoveToLine(int lineNumber)
{
DisplayTextPoint caretLocation = CaretPoint;
TextView.Selection.Clear();
caretLocation.MoveToLine(lineNumber);
AdvancedCaret.MoveTo(caretLocation.AdvancedTextPoint);
AdvancedCaret.EnsureVisible();
}
public override bool RemovePreviousIndent()
{
if (!CaretPoint.RemovePreviousIndent())
{
return(false);
}
AdvancedCaret.EnsureVisible();
return(true);
}
public override bool InsertIndent()
{
if (!CaretPoint.InsertIndent())
{
return(false);
}
AdvancedCaret.EnsureVisible();
return(true);
}
public override bool TransposeCharacter()
{
if (!CaretPoint.TransposeCharacter())
{
return(false);
}
TextView.Selection.Clear();
AdvancedCaret.EnsureVisible();
return(true);
}
public override void MoveToStartOfDocument(bool extendSelection)
{
VirtualSnapshotPoint oldCaretPoint = this.AdvancedCaret.Position.VirtualBufferPosition;
if (!extendSelection)
{
TextView.AdvancedTextView.Selection.Clear();
}
AdvancedCaret.MoveTo(new SnapshotPoint(TextView.AdvancedTextView.TextSnapshot, 0));
AdvancedCaret.EnsureVisible();
UpdateSelection(extendSelection, oldCaretPoint);
}
public override void MoveTo(int position, bool extendSelection)
{
VirtualSnapshotPoint oldCaretPoint = this.AdvancedCaret.Position.VirtualBufferPosition;
SnapshotPoint bufferPosition = new SnapshotPoint(TextView.AdvancedTextView.TextSnapshot, position);
if (!extendSelection)
{
TextView.AdvancedTextView.Selection.Clear();
}
AdvancedCaret.MoveTo(bufferPosition);
AdvancedCaret.EnsureVisible();
this.UpdateSelection(extendSelection, oldCaretPoint);
}
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 void MoveToLine(int lineNumber, int offset, bool extendSelection)
{
VirtualSnapshotPoint oldCaretPoint = this.AdvancedCaret.Position.VirtualBufferPosition;
if (!extendSelection)
{
TextView.AdvancedTextView.Selection.Clear();
}
ITextSnapshotLine line = TextView.AdvancedTextView.TextSnapshot.GetLineFromLineNumber(lineNumber);
AdvancedCaret.MoveTo(new VirtualSnapshotPoint(line, offset));
AdvancedCaret.EnsureVisible();
UpdateSelection(extendSelection, oldCaretPoint);
}
public override bool TransposeLine(int lineNumber)
{
if (!TextView.Selection.IsEmpty)
{
return(true);
}
if (!CaretPoint.TransposeLine(lineNumber))
{
return(false);
}
AdvancedCaret.EnsureVisible();
return(true);
}
public override bool InsertText(string text)
{
if (!TextView.Selection.IsEmpty)
{
if (!TextView.Selection.Delete())
{
return(false);
}
}
if (!CaretPoint.InsertText(text))
{
return(false);
}
AdvancedCaret.EnsureVisible();
return(true);
}
public override bool TransposeLine()
{
if (TextView.Selection.IsEmpty)
{
TextPoint caretPoint = CaretPoint;
double oldLeft = AdvancedCaret.Left;
if (!caretPoint.TransposeLine())
{
return(false);
}
AdvancedCaret.MoveTo(caretPoint.AdvancedTextPoint, PositionAffinity.Successor, false);
AdvancedCaret.EnsureVisible();
ITextViewLine newLine = AdvancedTextViewLine;
AdvancedCaret.MoveTo(newLine, oldLeft);
AdvancedCaret.EnsureVisible();
}
return(true);
}
public override bool DeleteNext()
{
if (TextView.Selection.IsEmpty)
{
if (!CaretPoint.DeleteNext())
{
return(false);
}
}
else
{
if (!TextView.Selection.Delete())
{
return(false);
}
}
AdvancedCaret.EnsureVisible();
return(true);
}
public override void MoveToPreviousCharacter(bool extendSelection)
{
VirtualSnapshotPoint oldCaretPoint = this.AdvancedCaret.Position.VirtualBufferPosition;
TextPoint startPoint = TextView.Selection.GetStartPoint();
bool selectionIsEmpty = TextView.Selection.IsEmpty;
if (!extendSelection)
{
TextView.AdvancedTextView.Selection.Clear();
}
if (!extendSelection && !selectionIsEmpty)
{
MoveTo(startPoint.CurrentPosition);
}
else
{
AdvancedCaret.MoveToPreviousCaretPosition();
}
AdvancedCaret.EnsureVisible();
UpdateSelection(extendSelection, oldCaretPoint);
}
private void PageUpDown(ScrollDirection direction)
{
if (direction == ScrollDirection.Up)
{
//If we scrolled a full page, then the bottom of the first fully visible line will be below
//the bottom of the view.
ITextViewLine firstVisibleLine = TextView.AdvancedTextView.TextViewLines.FirstVisibleLine;
SnapshotPoint oldFullyVisibleStart = (firstVisibleLine.VisibilityState == VisibilityState.FullyVisible)
? firstVisibleLine.Start
: firstVisibleLine.EndIncludingLineBreak; //Start of next line.
if (TextView.AdvancedTextView.ViewScroller.ScrollViewportVerticallyByPage(direction))
{
ITextViewLine newFirstLine = TextView.AdvancedTextView.TextViewLines.GetTextViewLineContainingBufferPosition(oldFullyVisibleStart);
//The old fully visible line should -- if we scrolled as much as we could -- be partially
//obscured. The shortfall between a full page and what we actually scrolled is the distance
//between the bottom of that line and the bottom of the screen.
if (TextView.AdvancedTextView.ViewportBottom > newFirstLine.Bottom)
{
AdvancedCaret.MoveTo(TextView.AdvancedTextView.TextViewLines.FirstVisibleLine);
}
else
{
AdvancedCaret.MoveToPreferredCoordinates();
}
}
}
else
{
//If we scroll a full page, the bottom of the last fully visible line will be
//positioned at 0.0.
ITextViewLine lastVisibleLine = TextView.AdvancedTextView.TextViewLines.LastVisibleLine;
// If the last line in the buffer is fully visible , then just move the caret to
// the last visible line
if ((lastVisibleLine.VisibilityState == VisibilityState.FullyVisible) &&
(lastVisibleLine.End == lastVisibleLine.Snapshot.Length))
{
AdvancedCaret.MoveTo(lastVisibleLine);
// No need to ensure the caret is visible since the line it just moved to is fully visible.
return;
}
SnapshotPoint oldFullyVisibleStart = ((lastVisibleLine.VisibilityState == VisibilityState.FullyVisible) || (lastVisibleLine.Start == 0))
? lastVisibleLine.Start
: (lastVisibleLine.Start - 1); //Actually just a point on the previous line.
if (TextView.AdvancedTextView.ViewScroller.ScrollViewportVerticallyByPage(direction))
{
ITextViewLine newLastLine = TextView.AdvancedTextView.TextViewLines.GetTextViewLineContainingBufferPosition(oldFullyVisibleStart);
if (newLastLine.Bottom > TextView.AdvancedTextView.ViewportTop)
{
AdvancedCaret.MoveTo(TextView.AdvancedTextView.TextViewLines.LastVisibleLine);
}
else
{
AdvancedCaret.MoveToPreferredCoordinates();
}
}
}
EnsureVisible();
}
public override void EnsureVisible()
{
AdvancedCaret.EnsureVisible();
}