private void MoveCaretToNextTabStop()
{
while (CaretColumn % IndentSize != 0 && CaretCharIsASpace)
{
Caret.MoveToNextCaretPosition();
}
Caret.EnsureVisible();
}
private void MoveCaretToPreviousTabStop()
{
Caret.MoveToPreviousCaretPosition();
while (CaretColumn % IndentSize != (IndentSize - 1) && CaretCharIsASpace)
{
Caret.MoveToPreviousCaretPosition();
}
Caret.MoveToNextCaretPosition();
Caret.EnsureVisible();
}
private void MoveCaretToPreviousTabStop()
{
var caretStartingPosition = Caret.Position.VirtualBufferPosition;
var caretStartingColumn = CaretColumn;
Caret.MoveToPreviousCaretPosition();
var lastCaretColumn = -1;
while (CaretColumn % IndentSize != (IndentSize - 1) && CaretCharIsASpace)
{
if (CaretColumn >= lastCaretColumn && lastCaretColumn != -1)
{
break; // Prevent infinite loop on first char of first line or in box selection
}
lastCaretColumn = CaretColumn;
Caret.MoveToPreviousCaretPosition();
}
if (Caret.Position.BufferPosition.Position != 0)
{ // Do this for all cases except the first char of the document
Caret.MoveToNextCaretPosition();
}
VirtualSnapshotPoint?caretNewPosition = Caret.Position.VirtualBufferPosition;
int movedBy = caretStartingColumn - CaretColumn;
if (movedBy % IndentSize != 0)
{
// We moved less than a full tab stop length. Only allow this if the cursor started in the middle of a full tab
for (int i = 0; i < IndentSize; i++)
{
if (Caret.Position.BufferPosition.Add(i).GetChar() != ' ')
{
caretNewPosition = null;
Caret.MoveTo(caretStartingPosition); // Do not align on non-exact tab stops
break;
}
}
if (caretNewPosition != null)
{
Caret.MoveTo(caretNewPosition.Value); // Go back to original new position
}
}
Caret.EnsureVisible();
}
private void MoveCaretToNextTabStop()
{
var caretStartingPosition = Caret.Position.VirtualBufferPosition;
var caretStartingColumn = CaretColumn;
var lastCaretColumn = -1;
while (CaretColumn % IndentSize != 0 && CaretCharIsASpace)
{
if (CaretColumn <= lastCaretColumn)
{
break; // Prevent infinite loop in box selection
}
lastCaretColumn = CaretColumn;
Caret.MoveToNextCaretPosition();
}
if (CaretColumn % IndentSize != 0)
{
Caret.MoveTo(caretStartingPosition); // Do not align on non-exact tab stops
}
Caret.EnsureVisible();
}
public override int Exec(ref Guid pguidCmdGroup, uint nCmdID, uint nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
{
if (ConvertTabsToSpaces &&
TextView.Selection.IsEmpty &&
pguidCmdGroup == VSConstants.VSStd2K &&
!IsInAutomationFunction &&
!DisplayHelper.IsCompletionActive &&
!DisplayHelper.IsSignatureHelpActive
)
{
switch (nCmdID)
{
case ARROW_LEFT:
case ARROW_RIGHT:
if (CaretIsWithinCodeRange)
{
goto default;
}
break;
case ARROW_UP:
case ARROW_DOWN:
Caret.PositionChanged -= CaretOnPositionChanged;
if (!_savedCaretColumn.HasValue)
{
_savedCaretColumn = VirtualCaretColumn;
}
break;
default:
_savedCaretColumn = null;
return(NextTarget.Exec(ref pguidCmdGroup, nCmdID, nCmdexecopt, pvaIn, pvaOut));
}
switch (nCmdID)
{
case ARROW_LEFT:
Caret.MoveToPreviousCaretPosition();
if (CaretCharIsASpace)
{
MoveCaretToPreviousTabStop();
return(VSConstants.S_OK);
}
Caret.MoveToNextCaretPosition();
break;
case ARROW_RIGHT:
if (CaretCharIsASpace)
{
Caret.MoveToNextCaretPosition();
MoveCaretToNextTabStop();
return(VSConstants.S_OK);
}
break;
case ARROW_UP:
try
{
_snapshotLine = TextView.TextSnapshot.GetLineFromPosition(
Caret.Position.BufferPosition.Subtract(CaretColumn + 1));
MoveCaretToNearestVirtualTabStop();
}
catch (ArgumentOutOfRangeException)
{
}
Caret.PositionChanged += CaretOnPositionChanged;
return(VSConstants.S_OK);
case ARROW_DOWN:
try
{
_snapshotLine = FindNextLine();
MoveCaretToNearestVirtualTabStop();
}
catch (ArgumentOutOfRangeException)
{
}
Caret.PositionChanged += CaretOnPositionChanged;
return(VSConstants.S_OK);
}
}
return(NextTarget.Exec(ref pguidCmdGroup, nCmdID, nCmdexecopt, pvaIn, pvaOut));
}
public override int Exec(ref Guid pguidCmdGroup, uint nCmdID, uint nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
{
ThreadHelper.ThrowIfNotOnUIThread();
if (nCmdID < ARROW_LEFT ||
nCmdID > SHIFT_ARROW_DOWN ||
(!TextView.Selection.IsEmpty && TextView.Selection.Mode == TextSelectionMode.Box) ||
pguidCmdGroup != VSConstants.VSStd2K ||
IsInAutomationFunction ||
DisplayHelper.IsCompletionActive ||
DisplayHelper.IsSignatureHelpActive)
{
_savedCaretColumn = null;
return(NextTarget.Exec(ref pguidCmdGroup, nCmdID, nCmdexecopt, pvaIn, pvaOut));
}
lock (_activeLock)
{
try
{
_isActive = true;
switch (nCmdID)
{
case ARROW_LEFT:
case ARROW_RIGHT:
case SHIFT_ARROW_LEFT:
case SHIFT_ARROW_RIGHT:
if (CaretIsWithinCodeRange)
{
goto default;
}
break;
case ARROW_UP:
case ARROW_DOWN:
case SHIFT_ARROW_UP:
case SHIFT_ARROW_DOWN:
_allowClearSavedCaretColumn = false;
if (!_savedCaretColumn.HasValue)
{
_savedCaretColumn = VirtualCaretColumn;
}
break;
default:
_savedCaretColumn = null;
ThreadHelper.ThrowIfNotOnUIThread();
return(NextTarget.Exec(ref pguidCmdGroup, nCmdID, nCmdexecopt, pvaIn, pvaOut));
}
var caretStartingPosition = Caret.Position.VirtualBufferPosition;
var selectionAnchorPoint = TextView.Selection.IsEmpty ? caretStartingPosition : TextView.Selection.AnchorPoint;
switch (nCmdID)
{
case ARROW_LEFT:
case SHIFT_ARROW_LEFT:
Caret.MoveToPreviousCaretPosition();
if (CaretCharIsASpace)
{
MoveCaretToPreviousTabStop();
AdjustTextSelection(nCmdID, selectionAnchorPoint);
return(VSConstants.S_OK);
}
Caret.MoveToNextCaretPosition();
break;
case ARROW_RIGHT:
case SHIFT_ARROW_RIGHT:
if (CaretCharIsASpace)
{
Caret.MoveToNextCaretPosition();
MoveCaretToNextTabStop();
AdjustTextSelection(nCmdID, selectionAnchorPoint);
return(VSConstants.S_OK);
}
break;
case ARROW_UP:
case SHIFT_ARROW_UP:
try
{
_snapshotLine = TextView.TextSnapshot.GetLineFromPosition(
Caret.Position.BufferPosition.Subtract(CaretColumn + 1));
MoveCaretToNearestVirtualTabStop();
}
catch (ArgumentOutOfRangeException)
{
}
_allowClearSavedCaretColumn = true;
AdjustTextSelection(nCmdID, selectionAnchorPoint);
return(VSConstants.S_OK);
case ARROW_DOWN:
case SHIFT_ARROW_DOWN:
try
{
_snapshotLine = FindNextLine();
MoveCaretToNearestVirtualTabStop();
}
catch (ArgumentOutOfRangeException)
{
}
_allowClearSavedCaretColumn = true;
AdjustTextSelection(nCmdID, selectionAnchorPoint);
return(VSConstants.S_OK);
}
return(NextTarget.Exec(ref pguidCmdGroup, nCmdID, nCmdexecopt, pvaIn, pvaOut));
}
finally
{
_isActive = false;
}
}
}
