Group and adjust LCD buttons code

Marlin/src/lcd/ultralcd.h

     #include "../feature/pause.h"
   #endif
 
-
   bool lcd_hasstatus();
   void lcd_setstatus(const char* message, const bool persist=false);
   void lcd_setstatusPGM(const char* message, const int8_t level=0);
   #define BUTTON_EXISTS(BN) (defined(BTN_## BN) && BTN_## BN >= 0)
   #define BUTTON_PRESSED(BN) !READ(BTN_## BN)
 
-  #if ENABLED(ULTIPANEL)
+  #if ENABLED(ULTIPANEL) // LCD with a click-wheel input
 
     extern bool defer_return_to_status;
 
 
     void lcd_goto_screen(screenFunc_t screen, const uint32_t encoder=0);
 
-    // Encoder click is directly connected
-
-    #define BLEN_A 0
-    #define BLEN_B 1
-
-    #define EN_A (_BV(BLEN_A))
-    #define EN_B (_BV(BLEN_B))
-
-    #if BUTTON_EXISTS(ENC)
-      #define BLEN_C 2
-      #define EN_C (_BV(BLEN_C))
-    #endif
-
-    #if BUTTON_EXISTS(BACK)
-      #define BLEN_D 3
-      #define EN_D _BV(BLEN_D)
-      #define LCD_BACK_CLICKED (buttons & EN_D)
-    #endif
-
-    extern volatile uint8_t buttons;  // The last-checked buttons in a bit array.
-    void lcd_buttons_update();
     void lcd_completion_feedback(const bool good=true);
 
     #if ENABLED(ADVANCED_PAUSE_FEATURE)
       void lcd_advanced_pause_show_message(const AdvancedPauseMessage message,
                                            const AdvancedPauseMode mode=ADVANCED_PAUSE_MODE_PAUSE_PRINT,
                                            const uint8_t extruder=active_extruder);
-    #endif // ADVANCED_PAUSE_FEATURE
+    #endif
 
     #if ENABLED(G26_MESH_VALIDATION)
       void lcd_chirp();
       float lcd_z_offset_edit();
     #endif
 
-  #else
-
-    inline void lcd_buttons_update() {}
-
   #endif
 
   #if ENABLED(FILAMENT_LCD_DISPLAY) && ENABLED(SDSUPPORT)
   constexpr bool lcd_wait_for_move = false;
 
   inline void lcd_refresh() {}
-  inline void lcd_buttons_update() {}
   inline bool lcd_hasstatus() { return false; }
   inline void lcd_setstatus(const char* const message, const bool persist=false) { UNUSED(message); UNUSED(persist); }
   inline void lcd_setstatusPGM(const char* const message, const int8_t level=0) { UNUSED(message); UNUSED(level); }
 
 #endif // ULTRA_LCD
 
+#if ENABLED(ULTIPANEL)
+
+  #if ENABLED(NEWPANEL) // Uses digital switches, not a shift register
+
+    // Wheel spin pins where BA is 00, 10, 11, 01 (1 bit always changes)
+    #define BLEN_A 0
+    #define BLEN_B 1
+
+    #define EN_A _BV(BLEN_A)
+    #define EN_B _BV(BLEN_B)
+
+    #if BUTTON_EXISTS(ENC)
+      #define BLEN_C 2
+      #define EN_C _BV(BLEN_C)
+    #endif
+
+    #if BUTTON_EXISTS(BACK)
+      #define BLEN_D 3
+      #define EN_D _BV(BLEN_D)
+      #define LCD_BACK_CLICKED (buttons & EN_D)
+    #endif
+
+  #endif // NEWPANEL
+
+  extern volatile uint8_t buttons;  // The last-checked buttons in a bit array.
+  void lcd_buttons_update();
+
+#else
+
+  inline void lcd_buttons_update() {}
+
+#endif
+
 #define LCD_MESSAGEPGM(x)      lcd_setstatusPGM(PSTR(x))
 #define LCD_ALERTMESSAGEPGM(x) lcd_setalertstatusPGM(PSTR(x))
 

Marlin/src/lcd/ultralcd_common_HD44780.h

     #define B_I2C_BTN_OFFSET 3 // (the first three bit positions reserved for EN_A, EN_B, EN_C)
 
     // button and encoder bit positions within 'buttons'
-    #define B_LE (BUTTON_LEFT<<B_I2C_BTN_OFFSET)    // The remaining normalized buttons are all read via I2C
-    #define B_UP (BUTTON_UP<<B_I2C_BTN_OFFSET)
-    #define B_MI (BUTTON_SELECT<<B_I2C_BTN_OFFSET)
-    #define B_DW (BUTTON_DOWN<<B_I2C_BTN_OFFSET)
-    #define B_RI (BUTTON_RIGHT<<B_I2C_BTN_OFFSET)
+    #define B_LE (BUTTON_LEFT   << B_I2C_BTN_OFFSET)    // The remaining normalized buttons are all read via I2C
+    #define B_UP (BUTTON_UP     << B_I2C_BTN_OFFSET)
+    #define B_MI (BUTTON_SELECT << B_I2C_BTN_OFFSET)
+    #define B_DW (BUTTON_DOWN   << B_I2C_BTN_OFFSET)
+    #define B_RI (BUTTON_RIGHT  << B_I2C_BTN_OFFSET)
 
     #undef LCD_CLICKED
     #if BUTTON_EXISTS(ENC)
       // the pause/stop/restart button is connected to BTN_ENC when used
       #define B_ST (EN_C)                            // Map the pause/stop/resume button into its normalized functional name
-      #define LCD_CLICKED (buttons&(B_MI|B_RI|B_ST)) // pause/stop button also acts as click until we implement proper pause/stop.
+      #define LCD_CLICKED (buttons & (B_MI|B_RI|B_ST)) // pause/stop button also acts as click until we implement proper pause/stop.
     #else
-      #define LCD_CLICKED (buttons&(B_MI|B_RI))
+      #define LCD_CLICKED (buttons & (B_MI|B_RI))
     #endif
 
     // I2C buttons take too long to read inside an interrupt context and so we read them during lcd_update
 
       #define B_I2C_BTN_OFFSET 3 // (the first three bit positions reserved for EN_A, EN_B, EN_C)
 
-      #define B_MI (PANELOLU2_ENCODER_C<<B_I2C_BTN_OFFSET) // requires LiquidTWI2 library v1.2.3 or later
+      #define B_MI (PANELOLU2_ENCODER_C << B_I2C_BTN_OFFSET) // requires LiquidTWI2 library v1.2.3 or later
 
       #undef LCD_CLICKED
       #define LCD_CLICKED (buttons & B_MI)