private bool HandleSingleClick(InputEventArgs e, ModifierKeys modifiers)
{
// Don't do anything if there is no history
if (_history.VisualComponent.TextView.TextBuffer.CurrentSnapshot.Length == 0)
{
_lastSelectedLineNumber = null;
return(true);
}
var point = GetAdjustedPosition(e, _history.VisualComponent.TextView);
var lineNumber = GetLineNumberUnderPoint(point);
if (lineNumber == -1)
{
_lastSelectedLineNumber = null;
return(false);
}
switch (modifiers)
{
case ModifierKeys.None:
_history.ClearHistoryEntrySelection();
_history.SelectHistoryEntry(lineNumber);
_lastSelectedLineNumber = lineNumber;
return(false);
case ModifierKeys.Control:
_history.VisualComponent.TextView.Selection.Clear();
_history.ToggleHistoryEntrySelection(lineNumber);
_lastSelectedLineNumber = lineNumber;
return(true);
case ModifierKeys.Shift:
if (!_lastSelectedLineNumber.HasValue)
{
_history.ClearHistoryEntrySelection();
_history.SelectHistoryEntry(lineNumber);
_lastSelectedLineNumber = lineNumber;
return(false);
}
if (_history.HasSelectedEntries)
{
if (lineNumber > _lastSelectedLineNumber.Value)
{
_history.ClearHistoryEntrySelection();
_history.SelectHistoryEntries(Enumerable.Range(_lastSelectedLineNumber.Value, lineNumber - _lastSelectedLineNumber.Value + 1));
}
else if (lineNumber < _lastSelectedLineNumber.Value)
{
_history.ClearHistoryEntrySelection();
_history.SelectHistoryEntries(Enumerable.Range(lineNumber, _lastSelectedLineNumber.Value - lineNumber + 1));
}
return(true);
}
return(false);
default:
_lastSelectedLineNumber = null;
return(false);
}
}
