Don't close menu(s) on certain operations

In several cases we don't want menu(s) to close when an action on menu was
done. For example on drag-n-drop or menu item deletion (where confirmation
dialog is shown).

In such situations `s_bPreventClosing` was set to true (and then back to
false when closing was allowed again).
Though original code honored this variable only in certain situations and
typically (at least on Win10) menus were hidden/closed despite of it.

This patch changes the behavior and menus(s) are not closed when
`s_bPreventClosing` is set to true.
Basically now menu(s) stay visible until there is an action that changes
active window.

Following functionality was also removed because it is not needed now:

* CMenuContainer::HideTemp
* COwnerWindow::OnClear
  WM_CLEAR was sent to the window only by already removed `HideTemp`

Src/StartMenu/StartMenuDLL/DragDrop.cpp

@@ -248,7 +248,6 @@ bool CMenuContainer::DragOutApps( const CItemManager::ItemInfo *pInfo )
 	s_bDragFromTree=false;
 	if (!m_bDestroyed)
 		KillTimer(TIMER_DRAG);
-	HideTemp(false);
 	s_bPreventClosing=false;
 
 	if (s_bDragClosed)
@@ -343,7 +342,6 @@ bool CMenuContainer::DragOut( int index, bool bApp )
 	if (!m_bDestroyed)
 		KillTimer(TIMER_DRAG);
 	s_bDragMovable=false;
-	HideTemp(false);
 	s_bPreventClosing=false;
 
 	if (s_bDragClosed)
@@ -863,8 +861,6 @@ HRESULT STDMETHODCALLTYPE CMenuContainer::Drop( IDataObject *pDataObj, DWORD grf
 			s_bPreventClosing=true;
 			AddRef();
 			pTarget->Drop(pDataObj,grfKeyState,pt,pdwEffect);
-			if (!bOld)
-				HideTemp(false);
 			s_bPreventClosing=bOld;
 			for (std::vector<CMenuContainer*>::iterator it=s_Menus.begin();it!=s_Menus.end();++it)
 				if (!(*it)->m_bDestroyed)

Src/StartMenu/StartMenuDLL/MenuCommands.cpp

@@ -2396,7 +2396,6 @@ void CMenuContainer::ActivateItem( int index, TActivateType type, const POINT *p
 				}
 			}
 			DestroyMenu(menu2);
-			HideTemp(false);
 			s_bPreventClosing=false;
 
 			PITEMID_CHILD newPidl=NULL;
@@ -2485,7 +2484,6 @@ void CMenuContainer::ActivateItem( int index, TActivateType type, const POINT *p
 				Invalidate();
 				if (m_HotItem<0) SetHotItem(index);
 			}
-			HideTemp(false);
 			s_bPreventClosing=false;
 		}
 		SetContextItem(-1);
@@ -2742,7 +2740,6 @@ void CMenuContainer::ActivateItem( int index, TActivateType type, const POINT *p
 				else
 					SetFocus();
 			}
-			HideTemp(false);
 			s_bPreventClosing=false;
 			s_HotPos=GetMessagePos();
 			res=CMD_RENAME;
@@ -2802,8 +2799,7 @@ void CMenuContainer::ActivateItem( int index, TActivateType type, const POINT *p
 			if (bRefresh || bRefreshMain)
 				info.fMask|=CMIC_MASK_NOASYNC; // wait for delete/link commands to finish so we can refresh the menu
 
-			if ((type!=ACTIVATE_MENU && type!=ACTIVATE_DELETE) || GetWinVersion()<WIN_VER_WIN8)
-				s_bPreventClosing=true;
+			s_bPreventClosing=true;
 			for (std::vector<CMenuContainer*>::iterator it=s_Menus.begin();it!=s_Menus.end();++it)
 				(*it)->EnableWindow(FALSE); // disable all menus
 			bool bAllPrograms=s_bAllPrograms;
@@ -2880,7 +2876,6 @@ void CMenuContainer::ActivateItem( int index, TActivateType type, const POINT *p
 				else
 					SetFocus();
 			}
-			HideTemp(false);
 			s_bPreventClosing=false;
 
 			if (!bKeepOpen && !bRefresh && !bRefreshMain)

Src/StartMenu/StartMenuDLL/MenuContainer.cpp

@@ -6365,11 +6365,6 @@ LRESULT CMenuContainer::OnRefresh( UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL
 	return 0;
 }
 
-void CMenuContainer::HideTemp( bool bHide )
-{
-	::PostMessage(g_OwnerWindow,WM_CLEAR,bHide,0);
-}
-
 LRESULT CMenuContainer::OnActivate( UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled )
 {
 	if (LOWORD(wParam)!=WA_INACTIVE)
@@ -6379,6 +6374,9 @@ LRESULT CMenuContainer::OnActivate( UINT uMsg, WPARAM wParam, LPARAM lParam, BOO
 		return 0;
 	}
 #ifndef PREVENT_CLOSING
+	if (s_bPreventClosing)
+		return 0;
+
 	if (lParam)
 	{
 		// check if another menu window is being activated
@@ -6389,24 +6387,15 @@ LRESULT CMenuContainer::OnActivate( UINT uMsg, WPARAM wParam, LPARAM lParam, BOO
 
 		if ((HWND)lParam==g_OwnerWindow || (HWND)lParam==g_TopWin7Menu)
 			return 0;
-
-		if (s_bPreventClosing && (::GetWindowLong((HWND)lParam,GWL_EXSTYLE)&WS_EX_TOPMOST))
-			return 0;
 	}
 
-	// a non-top-most window tries to activate while we are still here
-	if (s_bPreventClosing && (!g_TopWin7Menu || !s_bAllPrograms))
-		HideTemp(true);
-	else
-	{
-		for (std::vector<CMenuContainer*>::reverse_iterator it=s_Menus.rbegin();it!=s_Menus.rend();++it)
-			if ((*it)->m_hWnd && !(*it)->m_bDestroyed)
-			{
-				(*it)->PostMessage(WM_CLOSE);
-				(*it)->m_bClosing=true;
-			}
-		if (g_TopWin7Menu && s_bAllPrograms) ::PostMessage(g_TopWin7Menu,WM_CLOSE,0,0);
-	}
+	for (std::vector<CMenuContainer*>::reverse_iterator it=s_Menus.rbegin();it!=s_Menus.rend();++it)
+		if ((*it)->m_hWnd && !(*it)->m_bDestroyed)
+		{
+			(*it)->PostMessage(WM_CLOSE);
+			(*it)->m_bClosing=true;
+		}
+	if (g_TopWin7Menu && s_bAllPrograms) ::PostMessage(g_TopWin7Menu,WM_CLOSE,0,0);
 #endif
 
 	return 0;

Src/StartMenu/StartMenuDLL/MenuContainer.h

@@ -957,7 +957,6 @@ private:
 	friend LRESULT CALLBACK SubclassTopMenuProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData );
 	friend HRESULT CreatePinLink( PCIDLIST_ABSOLUTE sourcePidl, const wchar_t *name, const wchar_t *iconPath, int iconIndex );
 
-	static void HideTemp( bool bHide );
 	static void AddMRUShortcut( const wchar_t *path );
 	static void AddMRUAppId( const wchar_t *appid );
 	static void DeleteMRUShortcut( const wchar_t *path );

Src/StartMenu/StartMenuDLL/ProgramsTree.cpp

@@ -1601,8 +1601,6 @@ HRESULT CProgramsTree::Drop( IDataObject *pDataObj, DWORD grfKeyState, POINTL pt
 	CMenuContainer::s_bPreventClosing=true;
 	m_pOwner->AddRef();
 	pTarget->Drop(pDataObj,grfKeyState,pt,pdwEffect);
-	if (!bOld)
-		CMenuContainer::HideTemp(false);
 	CMenuContainer::s_bPreventClosing=bOld;
 	for (std::vector<CMenuContainer*>::iterator it=CMenuContainer::s_Menus.begin();it!=CMenuContainer::s_Menus.end();++it)
 		if (!(*it)->m_bDestroyed)

Src/StartMenu/StartMenuDLL/StartMenuDLL.cpp

@@ -292,7 +292,6 @@ public:
 	// message handlers
 	BEGIN_MSG_MAP( COwnerWindow )
 		MESSAGE_HANDLER( WM_ACTIVATE, OnActivate )
-		MESSAGE_HANDLER( WM_CLEAR, OnClear )
 		MESSAGE_HANDLER( WM_SYSCOLORCHANGE, OnColorChange )
 		MESSAGE_HANDLER( WM_SETTINGCHANGE, OnSettingChange )
 		MESSAGE_HANDLER( WM_DISPLAYCHANGE, OnDisplayChange )
@@ -304,7 +303,7 @@ protected:
 		if (LOWORD(wParam)!=WA_INACTIVE)
 			return 0;
 
-		if (CMenuContainer::s_bPreventClosing && lParam && (::GetWindowLongPtr((HWND)lParam,GWL_EXSTYLE)&WS_EX_TOPMOST))
+		if (CMenuContainer::s_bPreventClosing)
 			return 0;
 
 		// check if another menu window is being activated
@@ -313,41 +312,13 @@ protected:
 			if ((*it)->m_hWnd==(HWND)lParam)
 				return 0;
 
-		if (CMenuContainer::s_bPreventClosing)
-		{
-			CMenuContainer::HideTemp(true);
-		}
-		else
-		{
-			for (std::vector<CMenuContainer*>::reverse_iterator it=CMenuContainer::s_Menus.rbegin();it!=CMenuContainer::s_Menus.rend();++it)
-				if (!(*it)->m_bDestroyed)
-					(*it)->PostMessage(WM_CLOSE);
-		}
+		for (std::vector<CMenuContainer*>::reverse_iterator it=CMenuContainer::s_Menus.rbegin();it!=CMenuContainer::s_Menus.rend();++it)
+			if (!(*it)->m_bDestroyed)
+				(*it)->PostMessage(WM_CLOSE);
+
 		return 0;
 	}
 
-	LRESULT OnClear( UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled )
-	{
-		bool bHide=(wParam!=0); // hide or destroy
-		if (CMenuContainer::s_bTempHidden!=bHide)
-		{
-			CMenuContainer::s_bTempHidden=bHide;
-			if (bHide && CMenuContainer::s_UserPicture.m_hWnd)
-				CMenuContainer::s_UserPicture.ShowWindow(SW_HIDE);
-			for (std::vector<CMenuContainer*>::iterator it=CMenuContainer::s_Menus.begin();it!=CMenuContainer::s_Menus.end();++it)
-			{
-				if ((*it)->m_hWnd && !(*it)->m_bDestroyed)
-				{
-					(*it)->m_bClosing=true;
-					if (!bHide)
-						(*it)->PostMessage(WM_CLOSE);
-					else
-						(*it)->ShowWindow(SW_HIDE);
-				}
-			}
-		}
-		return 0;
-	}
 
 	LRESULT OnColorChange( UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled )
 	{