Method serialize

lib/Epub/Epub/blocks/TextBlock.cpp:76–119

}

bool TextBlock::serialize(HalFile& file) const {
  // Focus annotations are optional; vectors are either empty (no splits in this block)
  // or sized in lockstep with words[].
  const bool hasFocus = !wordFocusBoundary.empty();
  if (words.size() != wordXpos.size() || words.size() != wordStyles.size() ||
      (hasFocus && (words.size() != wordFocusBoundary.size() || words.size() != wordFocusSuffixX.size()))) {
    LOG_ERR("TXB", "Serialization failed: size mismatch (words=%u, xpos=%u, styles=%u, boundary=%u, suffixX=%u)\n",
            static_cast<uint32_t>(words.size()), static_cast<uint32_t>(wordXpos.size()),
            static_cast<uint32_t>(wordStyles.size()), static_cast<uint32_t>(wordFocusBoundary.size()),
            static_cast<uint32_t>(wordFocusSuffixX.size()));
    return false;
  }

  // Word data
  serialization::writePod(file, static_cast<uint16_t>(words.size()));
  for (const auto& w : words) serialization::writeString(file, w);
  for (auto x : wordXpos) serialization::writePod(file, x);
  for (auto s : wordStyles) serialization::writePod(file, s);
  // Focus block: 1-byte presence flag, followed by per-word vectors only when present.
  // Saves 3 bytes/word when focus reading is disabled or no word on this line was split.
  serialization::writePod(file, static_cast<uint8_t>(hasFocus ? 1 : 0));
  if (hasFocus) {
    for (auto b : wordFocusBoundary) serialization::writePod(file, b);
    for (auto sx : wordFocusSuffixX) serialization::writePod(file, sx);
  }

  // Style (alignment + margins/padding/indent)
  serialization::writePod(file, blockStyle.alignment);
  serialization::writePod(file, blockStyle.textAlignDefined);
  serialization::writePod(file, blockStyle.marginTop);
  serialization::writePod(file, blockStyle.marginBottom);
  serialization::writePod(file, blockStyle.marginLeft);
  serialization::writePod(file, blockStyle.marginRight);
  serialization::writePod(file, blockStyle.paddingTop);
  serialization::writePod(file, blockStyle.paddingBottom);
  serialization::writePod(file, blockStyle.paddingLeft);
  serialization::writePod(file, blockStyle.paddingRight);
  serialization::writePod(file, blockStyle.textIndent);
  serialization::writePod(file, blockStyle.textIndentDefined);
  serialization::writePod(file, blockStyle.isRtl);
  serialization::writePod(file, blockStyle.directionDefined);

  return true;
}

std::unique_ptr<TextBlock> TextBlock::deserialize(HalFile& file) {
  uint16_t wc;