Fix SD card reselect when scrolled (#13624)

- Change encoder position to 16-bit integer.
- Fix `SD_REPRINT_LAST_SELECTED_FILE` when the screen is scrolled.

Marlin/src/lcd/menu/game/invaders.cpp

   if (ui.first_page) {
 
     // Update Cannon Position
-    int32_t ep = (int32_t)ui.encoderPosition;
+    int16_t ep = int16_t(ui.encoderPosition);
     ep = constrain(ep, 0, (LCD_PIXEL_WIDTH - (CANNON_W)) / (CANNON_VEL));
     ui.encoderPosition = ep;
 

Marlin/src/lcd/menu/menu.cpp

 bool screen_changed;
 
 // Value Editing
-PGM_P editLabel;
-void *editValue;
-int32_t minEditValue, maxEditValue;
-screenFunc_t callbackFunc;
-bool liveEdit;
+PGM_P MenuItemBase::editLabel;
+void* MenuItemBase::editValue;
+int16_t MenuItemBase::minEditValue, MenuItemBase::maxEditValue;
+screenFunc_t MenuItemBase::callbackFunc;
+bool MenuItemBase::liveEdit;
 
 // Prevent recursion into screen handlers
 bool no_reentry = false;
  */
 void MenuItemBase::edit(strfunc_t strfunc, loadfunc_t loadfunc) {
   ui.encoder_direction_normal();
-  if ((int32_t)ui.encoderPosition < 0) ui.encoderPosition = 0;
-  if ((int32_t)ui.encoderPosition > maxEditValue) ui.encoderPosition = maxEditValue;
+  if (int16_t(ui.encoderPosition) < 0) ui.encoderPosition = 0;
+  if (int16_t(ui.encoderPosition) > maxEditValue) ui.encoderPosition = maxEditValue;
   if (ui.should_draw())
     draw_edit_screen(editLabel, strfunc(ui.encoderPosition + minEditValue));
   if (ui.lcd_clicked || (liveEdit && ui.should_draw())) {
   }
 }
 
-void MenuItemBase::init(PGM_P const el, void * const ev, const int32_t minv, const int32_t maxv, const uint32_t ep, const screenFunc_t cs, const screenFunc_t cb, const bool le) {
+void MenuItemBase::init(PGM_P const el, void * const ev, const int16_t minv, const int16_t maxv, const uint16_t ep, const screenFunc_t cs, const screenFunc_t cb, const bool le) {
   ui.save_previous_screen();
   ui.refresh();
   editLabel = el;
 /**
  * General function to go directly to a screen
  */
-void MarlinUI::goto_screen(screenFunc_t screen, const uint32_t encoder/*=0*/, const uint8_t top/*=0*/, const uint8_t items/*=0*/) {
+void MarlinUI::goto_screen(screenFunc_t screen, const uint16_t encoder/*=0*/, const uint8_t top/*=0*/, const uint8_t items/*=0*/) {
   if (currentScreen != screen) {
 
     #if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
     #endif
     ui.encoder_direction_normal();
     if (ui.encoderPosition) {
-      const int16_t babystep_increment = (int32_t)ui.encoderPosition * (BABYSTEP_MULTIPLICATOR);
+      const int16_t babystep_increment = int16_t(ui.encoderPosition) * (BABYSTEP_MULTIPLICATOR);
       ui.encoderPosition = 0;
 
       const float diff = planner.steps_to_mm[Z_AXIS] * babystep_increment,
 
 void do_select_screen(PGM_P const yes, PGM_P const no, bool &yesno, PGM_P const pref, const char * const string, PGM_P const suff) {
   if (ui.encoderPosition) {
-    yesno = int32_t(ui.encoderPosition) > 0;
+    yesno = int16_t(ui.encoderPosition) > 0;
     ui.encoderPosition = 0;
   }
   draw_select_screen(yes, no, yesno, pref, string, suff);

Marlin/src/lcd/menu/menu.h

 ////////////////////////////////////////////
 
 class MenuItemBase {
+  private:
+    static PGM_P editLabel;
+    static void *editValue;
+    static int16_t minEditValue, maxEditValue;
+    static screenFunc_t callbackFunc;
+    static bool liveEdit;
   protected:
-    typedef char* (*strfunc_t)(const int32_t);
-    typedef void (*loadfunc_t)(void *, const int32_t);
-    static void init(PGM_P const el, void * const ev, const int32_t minv, const int32_t maxv, const uint32_t ep, const screenFunc_t cs, const screenFunc_t cb, const bool le);
+    typedef char* (*strfunc_t)(const int16_t);
+    typedef void (*loadfunc_t)(void *, const int16_t);
+    static void init(PGM_P const el, void * const ev, const int16_t minv, const int16_t maxv, const uint16_t ep, const screenFunc_t cs, const screenFunc_t cb, const bool le);
     static void edit(strfunc_t, loadfunc_t);
 };
 
     typedef typename NAME::type_t type_t;
     static inline float unscale(const float value)    { return value * (1.0f / NAME::scale);  }
     static inline float scale(const float value)      { return value * NAME::scale;           }
-    static void  load(void *ptr, const int32_t value) { *((type_t*)ptr) = unscale(value);     }
-    static char* to_string(const int32_t value)       { return NAME::strfunc(unscale(value)); }
+    static void load(void *ptr, const int16_t value)  { *((type_t*)ptr) = unscale(value);     }
+    static char* to_string(const int16_t value)       { return NAME::strfunc(unscale(value)); }
   public:
     static void action_edit(PGM_P const pstr, type_t * const ptr, const type_t minValue, const type_t maxValue, const screenFunc_t callback=NULL, const bool live=false) {
-      const int32_t minv = scale(minValue);
-      init(pstr, ptr, minv, int32_t(scale(maxValue)) - minv, int32_t(scale(*ptr)) - minv, edit, callback, live);
+      const int16_t minv = scale(minValue);
+      init(pstr, ptr, minv, int16_t(scale(maxValue)) - minv, int16_t(scale(*ptr)) - minv, edit, callback, live);
     }
     static void edit() { MenuItemBase::edit(to_string, load); }
 };

Marlin/src/lcd/menu/menu_bed_leveling.cpp

     // Encoder knob or keypad buttons adjust the Z position
     //
     if (ui.encoderPosition) {
-      const float z = current_position[Z_AXIS] + float((int32_t)ui.encoderPosition) * (MESH_EDIT_Z_STEP);
+      const float z = current_position[Z_AXIS] + float(int16_t(ui.encoderPosition)) * (MESH_EDIT_Z_STEP);
       line_to_z(constrain(z, -(LCD_PROBE_Z_RANGE) * 0.5f, (LCD_PROBE_Z_RANGE) * 0.5f));
       ui.refresh(LCDVIEW_CALL_REDRAW_NEXT);
       ui.encoderPosition = 0;

Marlin/src/lcd/menu/menu_mixer.cpp

     ui.encoder_direction_normal();
     ENCODER_RATE_MULTIPLY(true);
     if (ui.encoderPosition != 0) {
-      mixer.gradient.start_z += float((int)ui.encoderPosition) * 0.1;
+      mixer.gradient.start_z += float(int16_t(ui.encoderPosition)) * 0.1;
       ui.encoderPosition = 0;
       NOLESS(mixer.gradient.start_z, 0);
       NOMORE(mixer.gradient.start_z, Z_MAX_POS);
     ui.encoder_direction_normal();
     ENCODER_RATE_MULTIPLY(true);
     if (ui.encoderPosition != 0) {
-      mixer.gradient.end_z += float((int)ui.encoderPosition) * 0.1;
+      mixer.gradient.end_z += float(int16_t(ui.encoderPosition)) * 0.1;
       ui.encoderPosition = 0;
       NOLESS(mixer.gradient.end_z, 0);
       NOMORE(mixer.gradient.end_z, Z_MAX_POS);
   #elif DUAL_MIXING_EXTRUDER
 
     if (ui.encoderPosition != 0) {
-      mixer.mix[0] += (int)ui.encoderPosition;
+      mixer.mix[0] += int16_t(ui.encoderPosition);
       ui.encoderPosition = 0;
       if (mixer.mix[0] < 0) mixer.mix[0] += 101;
       if (mixer.mix[0] > 100) mixer.mix[0] -= 101;

Marlin/src/lcd/menu/menu_motion.cpp

     #endif
 
     // Get the new position
-    const float diff = float((int32_t)ui.encoderPosition) * move_menu_scale;
+    const float diff = float(int16_t(ui.encoderPosition)) * move_menu_scale;
     #if IS_KINEMATIC
       manual_move_offset += diff;
-      if ((int32_t)ui.encoderPosition < 0)
+      if (int16_t(ui.encoderPosition) < 0)
         NOLESS(manual_move_offset, min - current_position[axis]);
       else
         NOMORE(manual_move_offset, max - current_position[axis]);
     #else
       current_position[axis] += diff;
-      if ((int32_t)ui.encoderPosition < 0)
+      if (int16_t(ui.encoderPosition) < 0)
         NOLESS(current_position[axis], min);
       else
         NOMORE(current_position[axis], max);
   ui.encoder_direction_normal();
   if (ui.encoderPosition) {
     if (!ui.processing_manual_move) {
-      const float diff = float((int32_t)ui.encoderPosition) * move_menu_scale;
+      const float diff = float(int16_t(ui.encoderPosition)) * move_menu_scale;
       #if IS_KINEMATIC
         manual_move_offset += diff;
       #else

Marlin/src/lcd/menu/menu_sdcard.cpp

 
 #if ENABLED(SD_REPRINT_LAST_SELECTED_FILE)
 
-  uint32_t last_sdfile_encoderPosition = 0xFFFF;
+  uint16_t sd_encoder_position = 0xFFFF;
+  int8_t sd_top_line, sd_items;
 
   void MarlinUI::reselect_last_file() {
-    if (last_sdfile_encoderPosition == 0xFFFF) return;
+    if (sd_encoder_position == 0xFFFF) return;
     //#if HAS_GRAPHICAL_LCD
     //  // This is a hack to force a screen update.
     //  ui.refresh(LCDVIEW_CALL_REDRAW_NEXT);
     //  ui.drawing_screen = screen_changed = true;
     //#endif
 
-    goto_screen(menu_sdcard, last_sdfile_encoderPosition);
-    last_sdfile_encoderPosition = 0xFFFF;
+    goto_screen(menu_sdcard, sd_encoder_position, sd_top_line, sd_items);
+    sd_encoder_position = 0xFFFF;
 
     defer_status_screen();
 
   public:
     static void action(CardReader &theCard) {
       #if ENABLED(SD_REPRINT_LAST_SELECTED_FILE)
-        last_sdfile_encoderPosition = ui.encoderPosition;  // Save which file was selected for later use
+        // Save menu state for the selected file
+        sd_encoder_position = ui.encoderPosition;
+        sd_top_line = ui.encoderTopLine;
+        sd_items = ui.screen_items;
       #endif
       #if ENABLED(SD_MENU_CONFIRM_START)
         do_print_file = false;

Marlin/src/lcd/menu/menu_tune.cpp

     if (ui.use_click()) return ui.goto_previous_screen_no_defer();
     ui.encoder_direction_normal();
     if (ui.encoderPosition) {
-      const int16_t steps = (int32_t)ui.encoderPosition * (BABYSTEP_MULTIPLICATOR);
+      const int16_t steps = int16_t(ui.encoderPosition) * (BABYSTEP_MULTIPLICATOR);
       ui.encoderPosition = 0;
       ui.refresh(LCDVIEW_REDRAW_NOW);
       babystep.add_steps(axis, steps);

Marlin/src/lcd/menu/menu_ubl.cpp

   ui.encoder_direction_normal();
 
   if (ui.encoderPosition) {
-    step_scaler += (int32_t)ui.encoderPosition;
+    step_scaler += int16_t(ui.encoderPosition);
     x_plot += step_scaler / (ENCODER_STEPS_PER_MENU_ITEM);
     ui.encoderPosition = 0;
     ui.refresh(LCDVIEW_REDRAW_NOW);

Marlin/src/lcd/ultralcd.cpp

 
 // Encoder Handling
 #if HAS_ENCODER_ACTION
-  uint32_t MarlinUI::encoderPosition;
+  uint16_t MarlinUI::encoderPosition;
   volatile int8_t encoderDiff; // Updated in update_buttons, added to encoderPosition every LCD update
 #endif
 
   #if ENABLED(ULTIPANEL_FEEDMULTIPLY)
 
     const int16_t old_frm = feedrate_percentage;
-          int16_t new_frm = old_frm + (int32_t)encoderPosition;
+          int16_t new_frm = old_frm + int16_t(encoderPosition);
 
     // Dead zone at 100% feedrate
     if (old_frm == 100) {
-      if ((int32_t)encoderPosition > ENCODER_FEEDRATE_DEADZONE)
+      if (int16_t(encoderPosition) > ENCODER_FEEDRATE_DEADZONE)
         new_frm -= ENCODER_FEEDRATE_DEADZONE;
-      else if ((int32_t)encoderPosition < -(ENCODER_FEEDRATE_DEADZONE))
+      else if (int16_t(encoderPosition) < -(ENCODER_FEEDRATE_DEADZONE))
         new_frm += ENCODER_FEEDRATE_DEADZONE;
       else
         new_frm = old_frm;

Marlin/src/lcd/ultralcd.h

     static void synchronize(PGM_P const msg=NULL);
 
     static screenFunc_t currentScreen;
-    static void goto_screen(const screenFunc_t screen, const uint32_t encoder=0, const uint8_t top=0, const uint8_t items=0);
+    static void goto_screen(const screenFunc_t screen, const uint16_t encoder=0, const uint8_t top=0, const uint8_t items=0);
     static void save_previous_screen();
     static void goto_previous_screen();
     static void return_to_status();
       static void wait_for_release();
     #endif
 
-    static uint32_t encoderPosition;
+    static uint16_t encoderPosition;
 
     #if ENABLED(REVERSE_ENCODER_DIRECTION)
       #define ENCODERBASE -1