crosspoint-reader-mod/src/activities/reader/EpubReaderActivity.h

#pragma once
#include <Epub.h>
#include <Epub/FootnoteEntry.h>
#include <Epub/Section.h>

#include "EpubReaderMenuActivity.h"
#include "activities/Activity.h"

class EpubReaderActivity final : public Activity {
  std::shared_ptr<Epub> epub;
  std::unique_ptr<Section> section = nullptr;
  int currentSpineIndex = 0;
  int nextPageNumber = 0;
  int pagesUntilFullRefresh = 0;
  int cachedSpineIndex = 0;
  int cachedChapterTotalPageCount = 0;
  // Signals that the next render should reposition within the newly loaded section
  // based on a cross-book percentage jump.
  bool pendingPercentJump = false;
  // Normalized 0.0-1.0 progress within the target spine item, computed from book percentage.
  float pendingSpineProgress = 0.0f;
  bool pendingScreenshot = false;
  bool skipNextButtonCheck = false;  // Skip button processing for one frame after subactivity exit

  // Footnote support
  std::vector<FootnoteEntry> currentPageFootnotes;
  struct SavedPosition {
    int spineIndex;
    int pageNumber;
  };
  static constexpr int MAX_FOOTNOTE_DEPTH = 3;
  SavedPosition savedPositions[MAX_FOOTNOTE_DEPTH] = {};
  int footnoteDepth = 0;

  void renderContents(std::unique_ptr<Page> page, int orientedMarginTop, int orientedMarginRight,
                      int orientedMarginBottom, int orientedMarginLeft);
  void renderStatusBar() const;
  void saveProgress(int spineIndex, int currentPage, int pageCount);
  // Jump to a percentage of the book (0-100), mapping it to spine and page.
  void jumpToPercent(int percent);
  void onReaderMenuConfirm(EpubReaderMenuActivity::MenuAction action);
  void applyOrientation(uint8_t orientation);

  // Footnote navigation
  void navigateToHref(const std::string& href, bool savePosition = false);
  void restoreSavedPosition();

 public:
  explicit EpubReaderActivity(GfxRenderer& renderer, MappedInputManager& mappedInput, std::unique_ptr<Epub> epub)
      : Activity("EpubReader", renderer, mappedInput), epub(std::move(epub)) {}
  void onEnter() override;
  void onExit() override;
  void loop() override;
  void render(RenderLock&& lock) override;
  bool isReaderActivity() const override { return true; }
};