Xteink-X4-crosspoint-reader/lib/Epub/Epub/blocks/TextBlock.cpp
Dave Allie 6e9ba1006a
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Use sane smaller data types for data in section.bin (#188)
## Summary

* Update EpdFontFamily::Style to be u8 instead of u32 (saving 3 bytes
per word)
* Update layout width/height to be u16 from int
* Update page element count to be u16 from u32
* Update text block element count to be u16 from u32
* Bumped section bin version to version 8
2025-12-31 13:11:36 +11:00

75 lines
2.5 KiB
C++

#include "TextBlock.h"
#include <GfxRenderer.h>
#include <Serialization.h>
void TextBlock::render(const GfxRenderer& renderer, const int fontId, const int x, const int y) const {
// Validate iterator bounds before rendering
if (words.size() != wordXpos.size() || words.size() != wordStyles.size()) {
Serial.printf("[%lu] [TXB] Render skipped: size mismatch (words=%u, xpos=%u, styles=%u)\n", millis(),
(uint32_t)words.size(), (uint32_t)wordXpos.size(), (uint32_t)wordStyles.size());
return;
}
auto wordIt = words.begin();
auto wordStylesIt = wordStyles.begin();
auto wordXposIt = wordXpos.begin();
for (size_t i = 0; i < words.size(); i++) {
renderer.drawText(fontId, *wordXposIt + x, y, wordIt->c_str(), true, *wordStylesIt);
std::advance(wordIt, 1);
std::advance(wordStylesIt, 1);
std::advance(wordXposIt, 1);
}
}
bool TextBlock::serialize(FsFile& file) const {
if (words.size() != wordXpos.size() || words.size() != wordStyles.size()) {
Serial.printf("[%lu] [TXB] Serialization failed: size mismatch (words=%u, xpos=%u, styles=%u)\n", millis(),
words.size(), wordXpos.size(), wordStyles.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);
// Block style
serialization::writePod(file, style);
return true;
}
std::unique_ptr<TextBlock> TextBlock::deserialize(FsFile& file) {
uint16_t wc;
std::list<std::string> words;
std::list<uint16_t> wordXpos;
std::list<EpdFontFamily::Style> wordStyles;
Style style;
// Word count
serialization::readPod(file, wc);
// Sanity check: prevent allocation of unreasonably large lists (max 10000 words per block)
if (wc > 10000) {
Serial.printf("[%lu] [TXB] Deserialization failed: word count %u exceeds maximum\n", millis(), wc);
return nullptr;
}
// Word data
words.resize(wc);
wordXpos.resize(wc);
wordStyles.resize(wc);
for (auto& w : words) serialization::readString(file, w);
for (auto& x : wordXpos) serialization::readPod(file, x);
for (auto& s : wordStyles) serialization::readPod(file, s);
// Block style
serialization::readPod(file, style);
return std::unique_ptr<TextBlock>(new TextBlock(std::move(words), std::move(wordXpos), std::move(wordStyles), style));
}