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feat: Support for Korean line breaks and glyph spacing (#2288)

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Co-authored-by: Uri Tauber <uritaube@gmail.com>
This commit is contained in:
Justin Mitchell
2026-06-17 17:27:03 +03:00
committed by GitHub
co-authored by Uri Tauber
parent d4069aeae5
commit 22f3575064
16 changed files with 443 additions and 121 deletions
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lib/Epub/Epub/ParsedText.h
+9 -4
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@@ -15,7 +15,8 @@ class GfxRenderer;
class ParsedText {
std::vector<std::string> words;
std::vector<EpdFontFamily::Style> wordStyles;
std::vector<bool> wordContinues; // true = word attaches to previous (no space before it)
std::vector<bool> wordContinues; // true = word attaches to previous with no break
std::vector<bool> wordNoSpaceBefore; // true = may break before token, but no synthetic space when joined
std::vector<bool> wordIsFocusSuffix; // true = token is the regular tail of a focus bold-prefix split
BlockStyle blockStyle;
bool extraParagraphSpacing;
@@ -27,18 +28,22 @@ class ParsedText {
std::vector<EpdFontFamily::Style> reorderedStylesScratch;
std::vector<uint16_t> reorderedWidthsScratch;
std::vector<bool> reorderedContinuesScratch;
std::vector<bool> reorderedNoSpaceBeforeScratch;
std::vector<bool> reorderedFocusSuffixScratch;
std::vector<uint16_t> visualOrderScratch;
int resolveFirstLineIndent(bool isFirstLine, const GfxRenderer& renderer, int fontId) const;
std::vector<size_t> computeLineBreaks(const GfxRenderer& renderer, int fontId, int pageWidth,
std::vector<uint16_t>& wordWidths, std::vector<bool>& continuesVec);
std::vector<uint16_t>& wordWidths, std::vector<bool>& continuesVec,
std::vector<bool>& noSpaceBeforeVec);
std::vector<size_t> computeHyphenatedLineBreaks(const GfxRenderer& renderer, int fontId, int pageWidth,
std::vector<uint16_t>& wordWidths, std::vector<bool>& continuesVec);
std::vector<uint16_t>& wordWidths, std::vector<bool>& continuesVec,
std::vector<bool>& noSpaceBeforeVec);
bool hyphenateWordAtIndex(size_t wordIndex, int availableWidth, const GfxRenderer& renderer, int fontId,
std::vector<uint16_t>& wordWidths, bool allowFallbackBreaks);
void extractLine(size_t breakIndex, int pageWidth, const std::vector<uint16_t>& wordWidths,
const std::vector<bool>& continuesVec, const std::vector<size_t>& lineBreakIndices,
const std::vector<bool>& continuesVec, const std::vector<bool>& noSpaceBeforeVec,
const std::vector<size_t>& lineBreakIndices,
const std::function<void(std::shared_ptr<TextBlock>)>& processLine, const GfxRenderer& renderer,
int fontId);
std::vector<uint16_t> calculateWordWidths(const GfxRenderer& renderer, int fontId);