private static int HandleBackspace(
MultiCaretCommandFilter commandFilter,
ref Guid pguidCmdGroup,
uint nCmdID,
uint nCmdexecopt,
IntPtr pvaIn,
IntPtr pvaOut)
{
commandFilter.SelectionSwapExec(
(tempSelections, targetSelections) =>
{
using (var edit = commandFilter.CreateEdit())
{
foreach (var selection in tempSelections)
{
var span = selection.GetSelectionSpan();
if (span.Length != 0)
{
edit.Delete(span.Span);
}
else if (span.Start.Position > 0)
{
// If this span is zero length then we should delete
// the previous char - if it is an end of line char
// then we should make sure we delete the full set
// e.g. \r\n for windows line endings
var position = span.Start.Position - 1;
var length = 1;
if (IsEndOfLineChar(span.Snapshot, position))
{
while (position > 0 && IsEndOfLineChar(span.Snapshot, position - 1))
{
--position;
++length;
}
}
if (position >= 0)
{
edit.Delete(position, length);
}
}
}
edit.Apply();
}
// The tracking spans should now be zero length
// We add them back in here to ensure merging of overlaps
foreach (var selection in tempSelections)
{
targetSelections.InsertExpectEnd(selection);
}
});
return(VSConstants.S_OK);
}
private static int HandlePaste(
MultiCaretCommandFilter commandFilter,
ref Guid pguidCmdGroup,
uint nCmdID,
uint nCmdexecopt,
IntPtr pvaIn,
IntPtr pvaOut)
{
var text = Clipboard.GetText();
if (string.IsNullOrEmpty(text))
{
return(VSConstants.S_OK);
}
var pguidCmdGroupLocal = pguidCmdGroup;
commandFilter.SelectionSwapExec(
(tempSelections, targetSelections) =>
{
var textParts = text.Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
using (var edit = commandFilter.CreateEdit())
{
if (textParts.Length != tempSelections.Count)
{
foreach (var selection in tempSelections)
{
edit.Replace(selection.GetSelectionSpan().Span, text);
}
}
else
{
for (int i = 0; i < textParts.Length; ++i)
{
edit.Replace(tempSelections[i].GetSelectionSpan().Span, textParts[i]);
}
}
edit.Apply();
}
foreach (var selection in tempSelections)
{
// Add the selection into the list again - we do this so that we have
// clean selection details in the list and can handle any merging
targetSelections.InsertExpectEnd(selection);
}
});
pguidCmdGroup = pguidCmdGroupLocal;
return(VSConstants.S_OK);
}
private static int HandleTypeChar(
MultiCaretCommandFilter commandFilter,
ref Guid pguidCmdGroup,
uint nCmdID,
uint nCmdexecopt,
IntPtr pvaIn,
IntPtr pvaOut)
{
var typed = ((char)Marshal.GetObjectForNativeVariant <ushort>(pvaIn)).ToString();
commandFilter.SelectionSwapExec(
(tempSelections, targetSelections) =>
{
using (var edit = commandFilter.CreateEdit())
{
foreach (var selection in tempSelections)
{
edit.Replace(selection.GetSelectionSpan().Span, typed);
}
edit.Apply();
}
// Whatever we typed the tracking spans should now end at the
// end of our typing which is where our carets should be
foreach (var selection in tempSelections)
{
var newSelection = SingleSelection.Create(
commandFilter.textView.TextSnapshot,
selection.GetSelectionSpan().Span.End,
false);
if (newSelection.HasValue)
{
targetSelections.InsertExpectEnd(newSelection.Value);
}
}
});
return(VSConstants.S_OK);
}
private static int HandleCut(
MultiCaretCommandFilter commandFilter,
ref Guid pguidCmdGroup,
uint nCmdID,
uint nCmdexecopt,
IntPtr pvaIn,
IntPtr pvaOut)
{
commandFilter.SelectionSwapExec(
(tempSelections, targetSelections) =>
{
using (var edit = commandFilter.CreateEdit())
{
var copyText = new StringBuilder();
foreach (var selection in tempSelections)
{
var span = selection.GetSelectionSpan();
if (span.Length != 0)
{
copyText.AppendLine(span.GetText());
edit.Delete(span.Span);
}
}
Clipboard.SetText(copyText.ToString());
edit.Apply();
}
// The tracking spans should now be zero length
// We add them back in here to ensure merging of overlaps
foreach (var selection in tempSelections)
{
targetSelections.InsertExpectEnd(selection);
}
});
return(VSConstants.S_OK);
}
