Fixed unnecessary redisplays of menus

HISTORY

@@ -10034,7 +10034,7 @@ Video Disk Recorder Revision History
   (suggested by Stefan Hofmann).
 - Added vdrrootdir and incdir to vdr.pc (thanks to Stefan Hofmann).
 
-2025-02-12:
+2025-02-17:
 
 - Removed all DEPRECATED_* code.
 - Fixed error checking in case the fps value can't be determined by the frame parser.
@@ -10081,3 +10081,4 @@ Video Disk Recorder Revision History
 - Adjusted PLUGINS.html to the new API version numbering introduced in version 2.7.2.
 - The function cPlugin::MainThreadHook() has been deprecated and may be removed in future
   versions. Use proper locking instead.
+- Fixed unnecessary redisplays of menus.

menu.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: menu.c 5.20 2025/02/05 22:12:32 kls Exp $
+ * $Id: menu.c 5.21 2025/02/17 10:49:10 kls Exp $
  */
 
 #include "menu.h"
@@ -4673,15 +4673,16 @@ eOSState cMenuMain::ProcessKey(eKeys Key)
                default:      break;
                }
     }
-  if (!HasSubMenu() && Update(HadSubMenu))
-     Display();
+  bool DoDisplay = Update();
   if (Key != kNone) {
      if (I18nCurrentLanguage() != osdLanguage) {
         Set();
         if (!HasSubMenu())
-           Display();
+           DoDisplay = true;
         }
      }
+  if (DoDisplay)
+     Display();
   return state;
 }
 

osdbase.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: osdbase.c 5.8 2025/02/13 13:58:07 kls Exp $
+ * $Id: osdbase.c 5.9 2025/02/17 10:49:10 kls Exp $
  */
 
 #include "osdbase.h"
@@ -78,12 +78,16 @@ void cOsdObject::Show(void)
 cSkinDisplayMenu *cOsdMenu::displayMenu = NULL;
 int cOsdMenu::displayMenuCount = 0;
 int cOsdMenu::osdState = 0;
+cOsdMenu *cOsdMenu::topMenu = NULL;
 
 cOsdMenu::cOsdMenu(const char *Title, int c0, int c1, int c2, int c3, int c4)
 {
   isMenu = true;
   digit = 0;
   hasHotkeys = false;
+  if (!topMenu)
+     topMenu = this;
+  active = this == topMenu;
   displayMenuItems = 0;
   title = NULL;
   menuCategory = mcUnknown;
@@ -114,6 +118,8 @@ cOsdMenu::~cOsdMenu()
   cStatus::MsgOsdClear();
   if (!--displayMenuCount)
      DELETENULL(displayMenu);
+  if (this == topMenu)
+     topMenu = NULL;
 }
 
 void cOsdMenu::SetMenuCategory(eMenuCategory MenuCategory)
@@ -126,6 +132,11 @@ void cOsdMenu::SetMenuSortMode(eMenuSortMode MenuSortMode)
   menuSortMode = MenuSortMode;
 }
 
+void cOsdMenu::SetActive(bool Active)
+{
+  active = Active;
+}
+
 void cOsdMenu::SetDisplayMenu(void)
 {
   if (displayMenu) {
@@ -240,6 +251,8 @@ void cOsdMenu::Display(void)
      subMenu->Display();
      return;
      }
+  if (!active)
+     return;
   if (cOsdProvider::OsdSizeChanged(osdState))
      SetDisplayMenu();
   displayMenu->SetMessage(mtStatus, NULL);
@@ -533,8 +546,10 @@ eOSState cOsdMenu::HotKey(eKeys Key)
 
 eOSState cOsdMenu::AddSubMenu(cOsdMenu *SubMenu)
 {
+  SetActive(false);
   delete subMenu;
   subMenu = SubMenu;
+  subMenu->SetActive(true);
   subMenu->Display();
   return osContinue; // convenience return value
 }
@@ -543,6 +558,7 @@ eOSState cOsdMenu::CloseSubMenu(bool ReDisplay)
 {
   delete subMenu;
   subMenu = NULL;
+  SetActive(true);
   if (ReDisplay) {
      RefreshCurrent();
      Display();

osdbase.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: osdbase.h 5.1 2025/02/05 22:12:32 kls Exp $
+ * $Id: osdbase.h 5.2 2025/02/17 10:49:10 kls Exp $
  */
 
 #ifndef __OSDBASE_H
@@ -87,6 +87,7 @@ private:
   static cSkinDisplayMenu *displayMenu;
   static int displayMenuCount;
   static int osdState;
+  static cOsdMenu *topMenu;
   int displayMenuItems;
   char *title;
   int cols[cSkinDisplayMenu::MaxTabs];
@@ -102,6 +103,8 @@ private:
   char *status;
   int digit;
   bool hasHotkeys;
+  bool active;
+  void SetActive(bool Active);
   void DisplayHelp(bool Force = false);
   void DisplayNoStatus(void);
 protected: