Implement hyphenation support in text layout by enhancing word splitting and line breaking logic

lib/Epub/Epub/hyphenation/Hyphenator.h

@@ -1,20 +1,12 @@
 #pragma once
 
-#include <EpdFontFamily.h>
-
+#include <cstddef>
 #include <string>
-
-class GfxRenderer;
-
-// Holds the split portions of a hyphenated word.
-struct HyphenationResult {
-  std::string head;
-  std::string tail;
-};
+#include <vector>
 
 class Hyphenator {
  public:
-  // Splits a word so it fits within availableWidth, appending a hyphen to the head when needed.
-  static bool splitWord(const GfxRenderer& renderer, int fontId, const std::string& word, EpdFontStyle style,
-                        int availableWidth, HyphenationResult* result, bool force);
+  // Returns byte offsets where the word may be hyphenated. When includeFallback is true, all positions obeying the
+  // minimum prefix/suffix constraints are returned even if no language-specific rule matches.
+  static std::vector<size_t> breakOffsets(const std::string& word, bool includeFallback);
 };