Rename

src/activities/reader/MdReaderActivity.h

@@ -0,0 +1,92 @@
+#pragma once
+
+#include <MdParser.h>
+#include <Txt.h>
+
+#include <vector>
+
+#include "CrossPointSettings.h"
+#include "activities/Activity.h"
+
+struct MdHeading {
+  size_t offset = 0;
+  int level = 1;
+  std::string title;
+  int pageIndex = -1;
+};
+
+class MdReaderActivity final : public Activity {
+  std::unique_ptr<Txt> txt;
+
+  int currentPage = 0;
+  int totalPages = 1;
+  int pagesUntilFullRefresh = 0;
+
+  // A single rendered line on screen (after word-wrapping)
+  struct RenderedLine {
+    std::vector<MdParser::Span> spans;
+    int indent = 0;     // left indent in pixels
+    bool isHR = false;  // draw as horizontal rule
+    bool isCodeBlock = false;
+  };
+
+  // Streaming reader state
+  std::vector<size_t> pageOffsets;
+  std::vector<uint8_t> pageCodeBlockState;  // 1 if page starts inside a code block
+  std::vector<RenderedLine> currentPageLines;
+  std::vector<uint8_t> pageBuffer;
+
+  std::vector<MdHeading> headings;
+  int currentHeadingIndex = -1;
+
+  int linesPerPage = 0;
+  int viewportWidth = 0;
+  bool initialized = false;
+
+  // Cached settings for cache validation
+  int cachedFontId = 0;
+  uint8_t cachedScreenMargin = 0;
+  uint8_t cachedParagraphAlignment = CrossPointSettings::LEFT_ALIGN;
+  int cachedOrientedMarginTop = 0;
+  int cachedOrientedMarginRight = 0;
+  int cachedOrientedMarginBottom = 0;
+  int cachedOrientedMarginLeft = 0;
+
+  // Indent constants (in pixels)
+  static constexpr int LIST_INDENT = 20;
+  static constexpr int BLOCKQUOTE_INDENT = 16;
+  static constexpr int CODE_INDENT = 8;
+
+  void renderPage();
+  void renderStatusBar() const;
+
+  void initializeReader();
+  bool loadPageAtOffset(size_t offset, bool startInCodeBlock, std::vector<RenderedLine>& outLines, size_t& nextOffset,
+                        bool& endInCodeBlock);
+  void buildPageIndex();
+  bool loadPageIndexCache();
+  void savePageIndexCache() const;
+  void saveProgress() const;
+  void loadProgress();
+  void scanHeadings();
+  void assignHeadingPageNumbers();
+  int getHeadingIndexForOffset(size_t offset) const;
+  void jumpToHeading(bool next);
+
+  // Word-wrap a parsed markdown line into one or more RenderedLines.
+  // Returns true if all content was emitted, false if truncated by maxLines.
+  bool wordWrapParsedLine(const MdParser::ParsedLine& parsed, int indent, std::vector<RenderedLine>& outLines,
+                          int maxLines, bool isCodeBlock = false);
+
+  // Measure total pixel width of a span list
+  int measureSpans(const std::vector<MdParser::Span>& spans) const;
+
+ public:
+  explicit MdReaderActivity(GfxRenderer& renderer, MappedInputManager& mappedInput, std::unique_ptr<Txt> txt)
+      : Activity("MdReader", renderer, mappedInput), txt(std::move(txt)) {}
+  void onEnter() override;
+  void onExit() override;
+  void loop() override;
+  void render(RenderLock&&) override;
+  bool isReaderActivity() const override { return true; }
+};