/// <inheritdoc/>
int IOleCommandTarget.QueryStatus(ref Guid guidCmdGroup, uint cCmds, OLECMD[] prgCmds, IntPtr pCmdText)
{
using (OleCommandText oleCommandText = OleCommandText.FromQueryStatus(pCmdText))
{
Guid cmdGroup = guidCmdGroup;
for (uint i = 0; i < cCmds; i++)
{
OLECMDF status = QueryCommandStatus(ref cmdGroup, prgCmds[i].cmdID, oleCommandText);
if (status == default(OLECMDF) && _next != null)
{
int hr = _next.QueryStatus(ref cmdGroup, cCmds, prgCmds, pCmdText);
if (ErrorHandler.Failed(hr))
{
return(hr);
}
}
else
{
prgCmds[i].cmdf = (uint)status;
}
}
return(VSConstants.S_OK);
}
}
protected override OLECMDF QueryCommandStatus(ref Guid commandGroup, uint commandId, OleCommandText oleCommandText)
{
if (commandGroup == typeof(GitDiffMarginCommand).GUID)
{
switch ((GitDiffMarginCommand)commandId)
{
case GitDiffMarginCommand.ShowPopup:
{
EditorDiffMarginViewModel viewModel;
if (!TryGetMarginViewModel(out viewModel))
{
return(0);
}
var diffViewModel = GetCurrentDiffViewModel(viewModel);
if (diffViewModel != null)
{
return(OLECMDF.OLECMDF_SUPPORTED | OLECMDF.OLECMDF_ENABLED);
}
else
{
return(OLECMDF.OLECMDF_SUPPORTED);
}
}
case GitDiffMarginCommand.PreviousChange:
case GitDiffMarginCommand.NextChange:
{
EditorDiffMarginViewModel viewModel;
if (!TryGetMarginViewModel(out viewModel))
{
return(0);
}
// First look for a diff already showing a popup
EditorDiffViewModel diffViewModel = viewModel.DiffViewModels.OfType <EditorDiffViewModel>().FirstOrDefault(i => i.ShowPopup);
if (diffViewModel != null)
{
RelayCommand <DiffViewModel> command = (GitDiffMarginCommand)commandId == GitDiffMarginCommand.NextChange ? viewModel.NextChangeCommand : viewModel.PreviousChangeCommand;
if (command.CanExecute(diffViewModel))
{
return(OLECMDF.OLECMDF_SUPPORTED | OLECMDF.OLECMDF_ENABLED);
}
else
{
return(OLECMDF.OLECMDF_SUPPORTED);
}
}
diffViewModel = GetDiffViewModelToMoveTo(commandId, viewModel);
if (diffViewModel != null)
{
return(OLECMDF.OLECMDF_SUPPORTED | OLECMDF.OLECMDF_ENABLED);
}
else
{
return(OLECMDF.OLECMDF_SUPPORTED);
}
}
case GitDiffMarginCommand.RollbackChange:
case GitDiffMarginCommand.CopyOldText:
{
EditorDiffMarginViewModel viewModel;
if (!TryGetMarginViewModel(out viewModel))
{
return(0);
}
EditorDiffViewModel diffViewModel = viewModel.DiffViewModels.OfType <EditorDiffViewModel>().FirstOrDefault(i => i.ShowPopup);
if (diffViewModel != null)
{
ICommand command = (GitDiffMarginCommand)commandId == GitDiffMarginCommand.RollbackChange ? diffViewModel.RollbackCommand : diffViewModel.CopyOldTextCommand;
if (command.CanExecute(diffViewModel))
{
return(OLECMDF.OLECMDF_SUPPORTED | OLECMDF.OLECMDF_ENABLED);
}
}
// This command only works when a popup is open
return(OLECMDF.OLECMDF_SUPPORTED);
}
case GitDiffMarginCommand.ShowDiff:
{
EditorDiffMarginViewModel viewModel;
if (!TryGetMarginViewModel(out viewModel))
{
return(0);
}
if (viewModel.DiffViewModels.Any())
{
return(OLECMDF.OLECMDF_SUPPORTED | OLECMDF.OLECMDF_ENABLED);
}
else
{
return(OLECMDF.OLECMDF_SUPPORTED);
}
}
case GitDiffMarginCommand.GitDiffToolbar:
case GitDiffMarginCommand.GitDiffToolbarGroup:
// these aren't actually commands, but IDs of the command bars and groups
break;
default:
break;
}
}
return(0);
}
/// <summary>
/// Gets the current status of a particular command.
/// </summary>
/// <remarks>
/// The base implementation returns 0 for all commands, indicating the command is not supported by this command
/// filter.
/// </remarks>
/// <param name="commandGroup">The command group.</param>
/// <param name="commandId">The command ID.</param>
/// <param name="oleCommandText">A wrapper around the <see cref="OLECMDTEXT"/> object passed to
/// <see cref="IOleCommandTarget.QueryStatus"/>, or <see langword="null"/> if this parameter should be
/// ignored.</param>
/// <returns>A combination of values from the <see cref="OLECMDF"/> enumeration indicating the current status of
/// a particular command, or 0 if the command is not recognized by the current command filter.</returns>
protected virtual OLECMDF QueryCommandStatus(ref Guid commandGroup, uint commandId, OleCommandText oleCommandText)
{
return(default(OLECMDF));
}
