fix: swap reader menu navigation direction in CCW/inverted (#2321) (#2341)

Co-authored-by: Uri Tauber <uritaube@gmail.com>

src/MappedInputManager.cpp

@@ -1,7 +1,18 @@
 #include "MappedInputManager.h"
 
+#include <GfxRenderer.h>
+
 #include "CrossPointSettings.h"
 
+bool MappedInputManager::isNavDirectionSwapped() const {
+  // Key the swap on the orientation the screen is *actually* rendered at, not the persisted reader
+  // setting. The reader (and its modal menus) render rotated, so navigation/labels flip there; the
+  // home and settings UI render in portrait, so they never flip even when a rotated reader is configured.
+  const auto orientation = renderer.getOrientation();
+  return SETTINGS.frontButtonFollowOrientation &&
+         (orientation == GfxRenderer::PortraitInverted || orientation == GfxRenderer::LandscapeCounterClockwise);
+}
+
 bool MappedInputManager::mapButton(const Button button, bool (HalGPIO::*fn)(uint8_t) const) const {
   const auto sideLayout = SETTINGS.sideButtonLayout;
 
@@ -49,6 +60,15 @@ bool MappedInputManager::mapButton(const Button button, bool (HalGPIO::*fn)(uint
         default:
           return false;
       }
+    case Button::NavNext:
+      // Logical "next item" navigation: side Down + front Right, with the control axis flipped in
+      // INVERTED / LANDSCAPE_CCW (frontButtonFollowOrientation) so it matches the rotated hint labels.
+      return isNavDirectionSwapped() ? (mapButton(Button::Up, fn) || mapButton(Button::Left, fn))
+                                     : (mapButton(Button::Down, fn) || mapButton(Button::Right, fn));
+    case Button::NavPrevious:
+      // Logical "previous item" navigation: side Up + front Left, axis-flipped in the same orientations.
+      return isNavDirectionSwapped() ? (mapButton(Button::Down, fn) || mapButton(Button::Right, fn))
+                                     : (mapButton(Button::Up, fn) || mapButton(Button::Left, fn));
   }
 
   return false;
@@ -69,9 +89,7 @@ unsigned long MappedInputManager::getHeldTime() const { return gpio.getHeldTime(
 MappedInputManager::Labels MappedInputManager::mapLabels(const char* back, const char* confirm, const char* previous,
                                                          const char* next) const {
   // Swap previous/next labels to match the page turn direction swap in INVERTED and LANDSCAPE_CCW.
-  const bool swapLabels =
-      SETTINGS.frontButtonFollowOrientation && (SETTINGS.orientation == CrossPointSettings::INVERTED ||
-                                                SETTINGS.orientation == CrossPointSettings::LANDSCAPE_CCW);
+  const bool swapLabels = isNavDirectionSwapped();
   const char* leftLabel = swapLabels ? next : previous;
   const char* rightLabel = swapLabels ? previous : next;
 

src/MappedInputManager.h

@@ -2,9 +2,11 @@
 
 #include <HalGPIO.h>
 
+class GfxRenderer;
+
 class MappedInputManager {
  public:
-  enum class Button { Back, Confirm, Left, Right, Up, Down, Power, PageBack, PageForward };
+  enum class Button { Back, Confirm, Left, Right, Up, Down, Power, PageBack, PageForward, NavNext, NavPrevious };
 
   struct Labels {
     const char* btn1;
@@ -13,7 +15,7 @@ class MappedInputManager {
     const char* btn4;
   };
 
-  explicit MappedInputManager(HalGPIO& gpio) : gpio(gpio) {}
+  MappedInputManager(HalGPIO& gpio, const GfxRenderer& renderer) : gpio(gpio), renderer(renderer) {}
 
   void update() const { gpio.update(); }
   bool wasPressed(Button button) const;
@@ -26,8 +28,20 @@ class MappedInputManager {
   // Returns the raw front button index that was pressed this frame (or -1 if none).
   int getPressedFrontButton() const;
 
+  // True when the control axis is flipped relative to the physical buttons: the user opted into
+  // orientation-following front buttons AND the screen is *currently rendered* rotated (INVERTED /
+  // LANDSCAPE_CCW). Keyed on the live renderer orientation rather than the persisted reader setting,
+  // so portrait UI (home, settings) never swaps while the reader and its menus do.
+  [[nodiscard]] bool isNavDirectionSwapped() const;
+
  private:
   HalGPIO& gpio;
+  // Logical-to-physical button mapping depends on what the user is actually looking at: when the
+  // screen is rendered rotated, the directional buttons must flip to match. The renderer is the only
+  // authority on the *live* orientation (the reader rotates it and restores portrait on exit), so we
+  // read it here instead of CrossPointSettings.orientation, which is just the persisted reader
+  // preference and stays "rotated" even while portrait UI like home/settings is on screen.
+  const GfxRenderer& renderer;
 
   bool mapButton(Button button, bool (HalGPIO::*fn)(uint8_t) const) const;
 };

src/activities/reader/ReaderUtils.h

@@ -43,11 +43,8 @@ inline PageTurnResult detectPageTurn(const MappedInputManager& input) {
   const bool usePress = SETTINGS.longPressButtonBehavior == SETTINGS.OFF;
   const bool tiltNext = SETTINGS.tiltPageTurn && halTiltSensor.wasTiltedForward();
   const bool tiltPrev = SETTINGS.tiltPageTurn && halTiltSensor.wasTiltedBack();
-  const bool swapFront =
-      SETTINGS.frontButtonFollowOrientation && (SETTINGS.orientation == CrossPointSettings::INVERTED ||
-                                                SETTINGS.orientation == CrossPointSettings::LANDSCAPE_CCW);
-  const auto prevButton = swapFront ? MappedInputManager::Button::Right : MappedInputManager::Button::Left;
-  const auto nextButton = swapFront ? MappedInputManager::Button::Left : MappedInputManager::Button::Right;
+  const auto prevButton = MappedInputManager::Button::NavPrevious;
+  const auto nextButton = MappedInputManager::Button::NavNext;
   const bool prev =
       tiltPrev ||
       (usePress ? (input.wasPressed(MappedInputManager::Button::PageBack) || input.wasPressed(prevButton))

src/main.cpp

@@ -34,8 +34,8 @@
 #include "util/ButtonNavigator.h"
 #include "util/ScreenshotUtil.h"
 
-MappedInputManager mappedInputManager(gpio);
 GfxRenderer renderer(display);
+MappedInputManager mappedInputManager(gpio, renderer);
 ActivityManager activityManager(renderer, mappedInputManager);
 FontDecompressor fontDecompressor;
 SdCardFontSystem sdFontSystem;

src/util/ButtonNavigator.h

@@ -44,10 +44,8 @@ class ButtonNavigator final {
   [[nodiscard]] static int nextPageIndex(int currentIndex, int totalItems, int itemsPerPage);
   [[nodiscard]] static int previousPageIndex(int currentIndex, int totalItems, int itemsPerPage);
 
-  [[nodiscard]] static Buttons getNextButtons() {
-    return {MappedInputManager::Button::Down, MappedInputManager::Button::Right};
-  }
-  [[nodiscard]] static Buttons getPreviousButtons() {
-    return {MappedInputManager::Button::Up, MappedInputManager::Button::Left};
-  }
-};
+  // Navigation uses the logical NavNext / NavPrevious buttons; MappedInputManager::mapButton resolves
+  // them to physical buttons and applies any orientation-based direction swap, so this stays settings-free.
+  [[nodiscard]] static Buttons getNextButtons() { return {MappedInputManager::Button::NavNext}; }
+  [[nodiscard]] static Buttons getPreviousButtons() { return {MappedInputManager::Button::NavPrevious}; }
+};