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feat: dict based Hyphenation (#305)

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## Summary

* Adds (optional) Hyphenation for English, French, German, Russian
languages

## Additional Context

* Included hyphenation dictionaries add approximately 280kb to the flash
usage (German alone takes 200kb)
* Trie encoded dictionaries are adopted from hypher project
(https://github.com/typst/hypher)
* Soft hyphens (and other explicit hyphens) take precedence over
dict-based hyphenation. Overall, the hyphenation rules are quite
aggressive, as I believe it makes more sense on our smaller screen.

---------

Co-authored-by: Dave Allie <dave@daveallie.com>
This commit is contained in:
Arthur Tazhitdinov
2026-01-19 17:56:26 +05:00
committed by GitHub
parent 5fef99c641
commit 8824c87490
40 changed files with 36465 additions and 52 deletions
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6
lib/Epub/Epub/Section.h
View File

@@ -15,7 +15,7 @@ class Section {
FsFile file;
void writeSectionFileHeader(int fontId, float lineCompression, bool extraParagraphSpacing, uint8_t paragraphAlignment,
uint16_t viewportWidth, uint16_t viewportHeight);
uint16_t viewportWidth, uint16_t viewportHeight, bool hyphenationEnabled);
uint32_t onPageComplete(std::unique_ptr<Page> page);
public:
@@ -29,10 +29,10 @@ class Section {
filePath(epub->getCachePath() + "/sections/" + std::to_string(spineIndex) + ".bin") {}
~Section() = default;
bool loadSectionFile(int fontId, float lineCompression, bool extraParagraphSpacing, uint8_t paragraphAlignment,
uint16_t viewportWidth, uint16_t viewportHeight);
uint16_t viewportWidth, uint16_t viewportHeight, bool hyphenationEnabled);
bool clearCache() const;
bool createSectionFile(int fontId, float lineCompression, bool extraParagraphSpacing, uint8_t paragraphAlignment,
uint16_t viewportWidth, uint16_t viewportHeight,
uint16_t viewportWidth, uint16_t viewportHeight, bool hyphenationEnabled,
const std::function<void()>& progressSetupFn = nullptr,
const std::function<void(int)>& progressFn = nullptr);
std::unique_ptr<Page> loadPageFromSectionFile();