Method GetActiveMergeEditView

Src/MainFrm.cpp:1997–2014

@brief Return active merge edit view, if can figure it out/is available */

/** @brief Return active merge edit view, if can figure it out/is available */
CMergeEditView * CMainFrame::GetActiveMergeEditView()
{
	// NB: GetActiveDocument does not return the Merge Doc 
	//     even when the merge edit view is in front
	// NB: CMergeEditFrame::GetActiveView returns `nullptr` when location view active
	// So we have this rather complicated logic to try to get a merge edit view
	// We look at the front child window, which should be a frame
	// and we can get a MergeEditView from it, if it is a CMergeEditFrame
	// (DirViews use a different frame type)
	CMergeEditFrame * pFrame = dynamic_cast<CMergeEditFrame *>(GetActiveFrame());
	if (pFrame == nullptr) return nullptr;
	// Try to get the active MergeEditView (ie, left or right)
	if (pFrame->GetActiveView() != nullptr && pFrame->GetActiveView()->IsKindOf(RUNTIME_CLASS(CMergeEditView)))
	{
		return dynamic_cast<CMergeEditView *>(pFrame->GetActiveView());
	}
	return pFrame->GetMergeDoc()->GetActiveMergeView();
}

void CMainFrame::UpdatePrediffersMenu(CMenu* pPredifferMenu)
{