Method QueryContextMenu

src/TortoiseShell/ContextMenu.cpp:830–1116

}

STDMETHODIMP CShellExt::QueryContextMenu(HMENU hMenu, UINT indexMenu, UINT idCmdFirst, UINT /*idCmdLast*/, UINT uFlags)
{
	CTraceToOutputDebugString::Instance()(__FUNCTION__ ": Shell :: QueryContextMenu itemStates=%ld\n", itemStates);
	PreserveChdir preserveChdir;

	//first check if our drop handler is called
	//and then (if true) provide the context menu for the
	//drop handler
	if (m_State == FileStateDropHandler)
	{
		return QueryDropContext(uFlags, idCmdFirst, hMenu, indexMenu);
	}

	if ((uFlags & CMF_DEFAULTONLY)!=0)
		return S_OK;					//we don't change the default action

	if (files_.empty() && folder_.empty())
		return S_OK;

	if (((uFlags & 0x000f)!=CMF_NORMAL)&&(!(uFlags & CMF_EXPLORE))&&(!(uFlags & CMF_VERBSONLY)))
		return S_OK;

	if (IsIllegalFolder(folder_))
		return S_OK;

	if (folder_.empty())
	{
		// folder is empty, but maybe files are selected
		if (files_.empty())
			return S_OK;	// nothing selected - we don't have a menu to show
		// check whether a selected entry is an UID - those are namespace extensions
		// which we can't handle
		if (std::any_of(files_.cbegin(), files_.cend(), [](auto& file) { return file.starts_with(L"::{"); }))
			return S_OK;
	}
	else
	{
		if (folder_.starts_with(L"::{"))
			return S_OK;
	}

	if (((uFlags & CMF_EXTENDEDVERBS) == 0) && g_ShellCache.HideMenusForUnversionedItems())
	{
		if ((itemStates & (ITEMIS_INGIT | ITEMIS_INVERSIONEDFOLDER | ITEMIS_FOLDERINGIT | ITEMIS_BAREREPO | ITEMIS_INACCESSIBLE)) == 0)
			return S_OK;
	}

	//check if our menu is requested for a git admin directory
	if (GitAdminDir::IsAdminDirPath(folder_.c_str()))
		return S_OK;

	if (uFlags & CMF_EXTENDEDVERBS)
		itemStates |= ITEMIS_EXTENDED;

	regDiffLater.read();
	if (!std::wstring(regDiffLater).empty())
		itemStates |= ITEMIS_HASDIFFLATER;