public static SingleSelection Create(int start, int end, SingleSelection directionProvider)
{
var span = directionProvider.selection.TextBuffer.CurrentSnapshot
.CreateTrackingSpan(start, end - start, SpanTrackingMode.EdgeInclusive);
return(new SingleSelection(span, directionProvider.isReversed));
}
public SingleSelectionWithLocation(int caret, int start, int end, SingleSelection selection)
{
this.Caret = caret;
this.Start = start;
this.End = end;
this.Selection = selection;
this.IsZeroLength = this.Start == this.End;
}
protected override void Search(
MultiCaretCommandFilter commandFilter,
SelectionList targetSelections,
SingleSelection firstText,
SnapshotSpan lastText,
FindData findData)
{
targetSelections.InsertExpectEnd(
commandFilter.textSearch.FindAll(findData).ToSingleSelections(false));
}
public static IEnumerable <SingleSelection> ToSingleSelections(
this IEnumerable <SnapshotSpan> spans,
bool areReversed)
{
foreach (var span in spans)
{
var selection = SingleSelection.Create(span, areReversed);
if (selection.HasValue)
{
yield return(selection.Value);
}
}
}
private static int SplitSelectionIntoLines(
MultiCaretCommandFilter commandFilter,
ref Guid pguidCmdGroup,
uint nCmdID,
uint nCmdexecopt,
IntPtr pvaIn,
IntPtr pvaOut)
{
commandFilter.SelectionSwapExec(
(currentSelections, targetSelections) =>
{
foreach (var selection in currentSelections)
{
var span = selection.GetSelectionSpan();
var searchingStart = true;
SingleSelection?previous = null;
foreach (var line in commandFilter.textView.TextBuffer.CurrentSnapshot.Lines)
{
var intersection = line.Extent.Intersection(span);
if (intersection.HasValue)
{
if (previous.HasValue)
{
targetSelections.InsertExpectEnd(previous.Value);
previous = null;
}
searchingStart = false;
var newSelection = SingleSelection.Create(intersection.Value, false);
if (newSelection.HasValue)
{
if (intersection.Value.Length != 0)
{
targetSelections.InsertExpectEnd(newSelection.Value);
}
else
{
previous = newSelection;
}
}
}
else if (!searchingStart)
{
break;
}
}
}
});
return(VSConstants.S_OK);
}
protected override void Search(
MultiCaretCommandFilter commandFilter,
SelectionList targetSelections,
SingleSelection firstText,
SnapshotSpan lastText,
FindData findData)
{
SearchOne(
commandFilter,
firstText.GetSelectionSpan().Start.Position,
o => o.Start.Position,
targetSelections.InsertExpectStart,
findData);
}
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);
}
protected static void SearchOne(
MultiCaretCommandFilter commandFilter,
int startIndex,
Func <SnapshotSpan, int> getSearchStart,
Func <SingleSelection, bool> insert,
FindData findData)
{
// Look for the next selection - if the exact same selection already exists then
// we need to keep looking until we get back to the beginning.
var searchStart = startIndex;
while (true)
{
var next = commandFilter.textSearch.FindNext(searchStart, true, findData);
if (!next.HasValue)
{
return;
}
// If we have looped round then break out
searchStart = getSearchStart(next.Value);
if (searchStart == startIndex)
{
return;
}
var selection = SingleSelection.Create(next.Value, false);
if (!selection.HasValue)
{
return;
}
// If we manage to insert then we are done
if (insert(selection.Value))
{
return;
}
}
}
protected abstract void Search(
MultiCaretCommandFilter commandFilter,
SelectionList targetSelections,
SingleSelection firstText,
SnapshotSpan lastText,
FindData findData);
public SingleSelection WithDirection(SingleSelection directionProvider) => new SingleSelection(this.selection, directionProvider.isReversed);
public SingleSelection ExpandTo(int start, int end) => SingleSelection.Create(Math.Min(this.Start, start), Math.Max(this.End, end), this.Selection);