private ContextMenuDiffToolInfo GetContextMenuDiffToolInfo()
{
bool firstIsParent = _gitRevisionTester.AllFirstAreParentsToSelected(DiffFiles.SelectedItemParents, DiffFiles.Revision);
bool localExists = _gitRevisionTester.AnyLocalFileExists(DiffFiles.SelectedItemsWithParent.Select(i => i.Item));
IEnumerable <string> selectedItemParentRevs = DiffFiles.SelectedItemParents.Select(i => i.Guid);
bool allAreNew = DiffFiles.SelectedItemsWithParent.All(i => i.Item.IsNew);
bool allAreDeleted = DiffFiles.SelectedItemsWithParent.All(i => i.Item.IsDeleted);
return(new ContextMenuDiffToolInfo(
DiffFiles.Revision,
selectedItemParentRevs,
allAreNew: allAreNew,
allAreDeleted: allAreDeleted,
firstIsParent: firstIsParent,
firstParentsValid: _revisionGrid.IsFirstParentValid(),
localExists: localExists));
}