public PreviewEngine(
string title,
string helpString,
string description,
string topLevelItemName,
Glyph topLevelGlyph,
Solution newSolution,
Solution oldSolution,
IComponentModel componentModel,
IVsImageService2 imageService,
bool showCheckBoxes = true)
{
_topLevelName = topLevelItemName;
_topLevelGlyph = topLevelGlyph;
_title = title;
_helpString = helpString;
_description = description;
_newSolution = newSolution.WithMergedLinkedFileChangesAsync(oldSolution, cancellationToken: CancellationToken.None).Result;
_oldSolution = oldSolution;
_diffSelector = componentModel.GetService<ITextDifferencingSelectorService>();
_editorFactory = componentModel.GetService<IVsEditorAdaptersFactoryService>();
_componentModel = componentModel;
this.ShowCheckBoxes = showCheckBoxes;
_imageService = imageService;
}