Rename options with swap_ prefix

Marlin/Marlin.h

                retract_zlift,                      // M207 Z - G10 Retract hop size
                retract_recover_length,             // M208 S - G11 Recover length
                retract_recover_feedrate_mm_s,      // M208 F - G11 Recover feedrate
-               retract_length_swap,                // M207 W - G10 Swap Retract length
-               retract_recover_length_swap,        // M208 W - G11 Swap Recover length
+               swap_retract_length,                // M207 W - G10 Swap Retract length
+               swap_retract_recover_length,        // M208 W - G11 Swap Recover length
                swap_retract_recover_feedrate_mm_s; // M208 R - G11 Swap Recover feedrate
 #endif
 

Marlin/Marlin_main.cpp

         retract_zlift,                      // M207 Z - G10 Retract hop size
         retract_recover_length,             // M208 S - G11 Recover length
         retract_recover_feedrate_mm_s,      // M208 F - G11 Recover feedrate
-        retract_length_swap,                // M207 W - G10 Swap Retract length
-        retract_recover_length_swap,        // M208 W - G11 Swap Recover length
+        swap_retract_length,                // M207 W - G10 Swap Retract length
+        swap_retract_recover_length,        // M208 W - G11 Swap Recover length
         swap_retract_recover_feedrate_mm_s; // M208 R - G11 Swap Recover feedrate
   #if EXTRUDERS > 1
     bool retracted_swap[EXTRUDERS] = { false }; // Which extruders are swap-retracted
 
       // Retract by moving from a faux E position back to the current E position
       feedrate_mm_s = retract_feedrate_mm_s;
-      current_position[E_AXIS] += (swapping ? retract_length_swap : retract_length) / volumetric_multiplier[active_extruder];
+      current_position[E_AXIS] += (swapping ? swap_retract_length : retract_length) / volumetric_multiplier[active_extruder];
       sync_plan_position_e();
       prepare_move_to_destination();
 
       // A retract multiplier has been added here to get faster swap recovery
       feedrate_mm_s = swapping ? swap_retract_recover_feedrate_mm_s : retract_recover_feedrate_mm_s;
 
-      const float move_e = swapping ? retract_length_swap + retract_recover_length_swap : retract_length + retract_recover_length;
+      const float move_e = swapping ? swap_retract_length + swap_retract_recover_length : retract_length + retract_recover_length;
       current_position[E_AXIS] -= move_e / volumetric_multiplier[active_extruder];
       sync_plan_position_e();
 
    * M207: Set firmware retraction values
    *
    *   S[+units]    retract_length
-   *   W[+units]    retract_length_swap (multi-extruder)
+   *   W[+units]    swap_retract_length (multi-extruder)
    *   F[units/min] retract_feedrate_mm_s
    *   Z[units]     retract_zlift
    */
     if (parser.seen('S')) retract_length = parser.value_axis_units(E_AXIS);
     if (parser.seen('F')) retract_feedrate_mm_s = MMM_TO_MMS(parser.value_axis_units(E_AXIS));
     if (parser.seen('Z')) retract_zlift = parser.value_linear_units();
-    if (parser.seen('W')) retract_length_swap = parser.value_axis_units(E_AXIS);
+    if (parser.seen('W')) swap_retract_length = parser.value_axis_units(E_AXIS);
   }
 
   /**
    * M208: Set firmware un-retraction values
    *
    *   S[+units]    retract_recover_length (in addition to M207 S*)
-   *   W[+units]    retract_recover_length_swap (multi-extruder)
+   *   W[+units]    swap_retract_recover_length (multi-extruder)
    *   F[units/min] retract_recover_feedrate_mm_s
    *   R[units/min] swap_retract_recover_feedrate_mm_s
    */
     if (parser.seen('S')) retract_recover_length = parser.value_axis_units(E_AXIS);
     if (parser.seen('F')) retract_recover_feedrate_mm_s = MMM_TO_MMS(parser.value_axis_units(E_AXIS));
     if (parser.seen('R')) swap_retract_recover_feedrate_mm_s = MMM_TO_MMS(parser.value_axis_units(E_AXIS));
-    if (parser.seen('W')) retract_recover_length_swap = parser.value_axis_units(E_AXIS);
+    if (parser.seen('W')) swap_retract_recover_length = parser.value_axis_units(E_AXIS);
   }
 
   /**

Marlin/configuration_store.cpp

  *  513  M207 Z    retract_zlift                    (float)
  *  517  M208 S    retract_recover_length           (float)
  *  521  M208 F    retract_recover_feedrate_mm_s    (float)
- *  525  M207 W    retract_length_swap              (float)
- *  529  M208 W    retract_recover_length_swap      (float)
+ *  525  M207 W    swap_retract_length              (float)
+ *  529  M208 W    swap_retract_recover_length      (float)
  *  533  M208 R    swap_retract_recover_feedrate_mm_s (float)
  *
  * Volumetric Extrusion:                            21 bytes
                   retract_zlift = 0,
                   retract_recover_length = 0,
                   retract_recover_feedrate_mm_s = 0,
-                  retract_length_swap = 13,
-                  retract_recover_length_swap = 0,
+                  swap_retract_length = 13,
+                  swap_retract_recover_length = 0,
                   swap_retract_recover_feedrate_mm_s = 8;
     #endif
     EEPROM_WRITE(autoretract_enabled);
     EEPROM_WRITE(retract_zlift);
     EEPROM_WRITE(retract_recover_length);
     EEPROM_WRITE(retract_recover_feedrate_mm_s);
-    EEPROM_WRITE(retract_length_swap);
-    EEPROM_WRITE(retract_recover_length_swap);
+    EEPROM_WRITE(swap_retract_length);
+    EEPROM_WRITE(swap_retract_recover_length);
     EEPROM_WRITE(swap_retract_recover_feedrate_mm_s);
 
     EEPROM_WRITE(volumetric_enabled);
         EEPROM_READ(retract_zlift);
         EEPROM_READ(retract_recover_length);
         EEPROM_READ(retract_recover_feedrate_mm_s);
-        EEPROM_READ(retract_length_swap);
-        EEPROM_READ(retract_recover_length_swap);
+        EEPROM_READ(swap_retract_length);
+        EEPROM_READ(swap_retract_recover_length);
         EEPROM_READ(swap_retract_recover_feedrate_mm_s);
       #else
         EEPROM_READ(dummyb);
     retract_zlift = RETRACT_ZLIFT;
     retract_recover_length = RETRACT_RECOVER_LENGTH;
     retract_recover_feedrate_mm_s = RETRACT_RECOVER_FEEDRATE;
-    retract_length_swap = RETRACT_LENGTH_SWAP;
-    retract_recover_length_swap = RETRACT_RECOVER_LENGTH_SWAP;
+    swap_retract_length = RETRACT_LENGTH_SWAP;
+    swap_retract_recover_length = RETRACT_RECOVER_LENGTH_SWAP;
     swap_retract_recover_feedrate_mm_s = RETRACT_RECOVER_FEEDRATE_SWAP;
   #endif // FWRETRACT
 
       }
       CONFIG_ECHO_START;
       SERIAL_ECHOPAIR("  M207 S", LINEAR_UNIT(retract_length));
-      SERIAL_ECHOPAIR(" W", LINEAR_UNIT(retract_length_swap));
+      SERIAL_ECHOPAIR(" W", LINEAR_UNIT(swap_retract_length));
       SERIAL_ECHOPAIR(" F", MMS_TO_MMM(LINEAR_UNIT(retract_feedrate_mm_s)));
       SERIAL_ECHOLNPAIR(" Z", LINEAR_UNIT(retract_zlift));
 
       }
       CONFIG_ECHO_START;
       SERIAL_ECHOPAIR("  M208 S", LINEAR_UNIT(retract_recover_length));
-      SERIAL_ECHOPAIR(" W", LINEAR_UNIT(retract_recover_length_swap));
+      SERIAL_ECHOPAIR(" W", LINEAR_UNIT(swap_retract_recover_length));
       SERIAL_ECHOLNPAIR(" F", MMS_TO_MMM(LINEAR_UNIT(retract_recover_feedrate_mm_s)));
 
       if (!forReplay) {

Marlin/language_zh_CN.h

 #define MSG_KILLED                          _UxGT("已杀掉")  //"KILLED. "
 #define MSG_STOPPED                         _UxGT("已停止")  //"STOPPED. "
 #define MSG_CONTROL_RETRACT                 _UxGT("回抽长度mm")  //"Retract mm" retract_length, retract length (positive mm)
-#define MSG_CONTROL_RETRACT_SWAP            _UxGT("换手回抽长度mm")  //"Swap Re.mm" retract_length_swap, swap retract length (positive mm), for extruder change
+#define MSG_CONTROL_RETRACT_SWAP            _UxGT("换手回抽长度mm")  //"Swap Re.mm" swap_retract_length, swap retract length (positive mm), for extruder change
 #define MSG_CONTROL_RETRACTF                _UxGT("回抽速率mm/s")  //"Retract  V" retract_feedrate_mm_s, feedrate for retracting (mm/s)
 #define MSG_CONTROL_RETRACT_ZLIFT           _UxGT("Hop mm")  //"Hop mm" retract_zlift, retract Z-lift
 #define MSG_CONTROL_RETRACT_RECOVER         _UxGT("回抽恢复长度mm")  //"UnRet +mm" retract_recover_length, additional recover length (mm, added to retract length when recovering)
-#define MSG_CONTROL_RETRACT_RECOVER_SWAP    _UxGT("换手回抽恢复长度mm")  //"S UnRet+mm" retract_recover_length_swap, additional swap recover length (mm, added to retract length when recovering from extruder change)
+#define MSG_CONTROL_RETRACT_RECOVER_SWAP    _UxGT("换手回抽恢复长度mm")  //"S UnRet+mm" swap_retract_recover_length, additional swap recover length (mm, added to retract length when recovering from extruder change)
 #define MSG_CONTROL_RETRACT_RECOVERF        _UxGT("回抽恢复后进料速率mm/s")  //"UnRet  V" retract_recover_feedrate_mm_s, feedrate for recovering from retraction (mm/s)
 #define MSG_AUTORETRACT                     _UxGT("自动抽回")  //"AutoRetr." autoretract_enabled,
 #define MSG_FILAMENTCHANGE                  _UxGT("更换丝料")  //"Change filament"

Marlin/language_zh_TW.h

 #define MSG_KILLED                          _UxGT("已殺掉")  //"KILLED. "
 #define MSG_STOPPED                         _UxGT("已停止")  //"STOPPED. "
 #define MSG_CONTROL_RETRACT                 _UxGT("回抽長度mm")  //"Retract mm" retract_length, retract length (positive mm)
-#define MSG_CONTROL_RETRACT_SWAP            _UxGT("換手回抽長度mm")  //"Swap Re.mm" retract_length_swap, swap retract length (positive mm), for extruder change
+#define MSG_CONTROL_RETRACT_SWAP            _UxGT("換手回抽長度mm")  //"Swap Re.mm" swap_retract_length, swap retract length (positive mm), for extruder change
 #define MSG_CONTROL_RETRACTF                _UxGT("回抽速率mm/s")  //"Retract  V" retract_feedrate_mm_s, feedrate for retracting (mm/s)
 #define MSG_CONTROL_RETRACT_ZLIFT           _UxGT("Hop mm")  //"Hop mm" retract_zlift, retract Z-lift
 #define MSG_CONTROL_RETRACT_RECOVER         _UxGT("回抽恢複長度mm")  //"UnRet +mm" retract_recover_length, additional recover length (mm, added to retract length when recovering)
-#define MSG_CONTROL_RETRACT_RECOVER_SWAP    _UxGT("換手回抽恢複長度mm")  //"S UnRet+mm" retract_recover_length_swap, additional swap recover length (mm, added to retract length when recovering from extruder change)
+#define MSG_CONTROL_RETRACT_RECOVER_SWAP    _UxGT("換手回抽恢複長度mm")  //"S UnRet+mm" swap_retract_recover_length, additional swap recover length (mm, added to retract length when recovering from extruder change)
 #define MSG_CONTROL_RETRACT_RECOVERF        _UxGT("回抽恢複後進料速率mm/s")  //"UnRet  V" retract_recover_feedrate_mm_s, feedrate for recovering from retraction (mm/s)
 #define MSG_AUTORETRACT                     _UxGT("自動抽回")  //"AutoRetr." autoretract_enabled,
 #define MSG_FILAMENTCHANGE                  _UxGT("更換絲料")  //"Change filament"

Marlin/ultralcd.cpp

       MENU_ITEM_EDIT(bool, MSG_AUTORETRACT, &autoretract_enabled);
       MENU_ITEM_EDIT(float52, MSG_CONTROL_RETRACT, &retract_length, 0, 100);
       #if EXTRUDERS > 1
-        MENU_ITEM_EDIT(float52, MSG_CONTROL_RETRACT_SWAP, &retract_length_swap, 0, 100);
+        MENU_ITEM_EDIT(float52, MSG_CONTROL_RETRACT_SWAP, &swap_retract_length, 0, 100);
       #endif
       MENU_ITEM_EDIT(float3, MSG_CONTROL_RETRACTF, &retract_feedrate_mm_s, 1, 999);
       MENU_ITEM_EDIT(float52, MSG_CONTROL_RETRACT_ZLIFT, &retract_zlift, 0, 999);
       MENU_ITEM_EDIT(float52, MSG_CONTROL_RETRACT_RECOVER, &retract_recover_length, -100, 100);
       #if EXTRUDERS > 1
-        MENU_ITEM_EDIT(float52, MSG_CONTROL_RETRACT_RECOVER_SWAP, &retract_recover_length_swap, -100, 100);
+        MENU_ITEM_EDIT(float52, MSG_CONTROL_RETRACT_RECOVER_SWAP, &swap_retract_recover_length, -100, 100);
       #endif
       MENU_ITEM_EDIT(float3, MSG_CONTROL_RETRACT_RECOVERF, &retract_recover_feedrate_mm_s, 1, 999);
       END_MENU();