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Rename trimTrailingPunctuation to trimSurroundingPunctuation and update logic to remove surrounding punctuation; add explicit hyphen handling in breakOffsets function.

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This commit is contained in:
Arthur Tazhitdinov 2025-12-26 06:03:38 +05:00
parent 23183a6270
commit f6767c857f
3 changed files with 43 additions and 3 deletions
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5
lib/Epub/Epub/hyphenation/HyphenationCommon.cpp
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@ -92,7 +92,10 @@ bool isPunctuation(const uint32_t cp) {
}
}
void trimTrailingPunctuation(std::vector<CodepointInfo>& cps) {
void trimSurroundingPunctuation(std::vector<CodepointInfo>& cps) {
while (!cps.empty() && isPunctuation(cps.front().value)) {
cps.erase(cps.begin());
}
while (!cps.empty() && isPunctuation(cps.back().value)) {
cps.pop_back();
}

2
lib/Epub/Epub/hyphenation/HyphenationCommon.h
View File

@ -28,6 +28,6 @@ bool isCyrillicConsonant(uint32_t cp);
bool isAlphabetic(uint32_t cp);
bool isVowel(uint32_t cp);
bool isPunctuation(uint32_t cp);
void trimTrailingPunctuation(std::vector<CodepointInfo>& cps);
void trimSurroundingPunctuation(std::vector<CodepointInfo>& cps);
Script detectScript(const std::vector<CodepointInfo>& cps);

39
lib/Epub/Epub/hyphenation/Hyphenator.cpp
View File

@ -48,6 +48,32 @@ std::vector<CodepointInfo> collectCodepoints(const std::string& word) {
return cps;
}
bool isExplicitHyphen(const uint32_t cp) { return cp == '-' || cp == 0x2010; }
std::vector<size_t> collectExplicitHyphenIndexes(const std::vector<CodepointInfo>& cps) {
std::vector<size_t> indexes;
for (size_t i = 0; i < cps.size(); ++i) {
if (!isExplicitHyphen(cps[i].value)) {
continue;
}
if (i == 0 || i + 1 >= cps.size()) {
continue;
}
if (!isAlphabetic(cps[i - 1].value) || !isAlphabetic(cps[i + 1].value)) {
continue;
}
const size_t breakIndex = i + 1;
if (breakIndex >= cps.size()) {
continue;
}
if (breakIndex == 0) {
continue;
}
indexes.push_back(breakIndex);
}
return indexes;
}
// Rejects words containing punctuation or digits unless forced.
bool hasOnlyAlphabetic(const std::vector<CodepointInfo>& cps) {
if (cps.empty()) {
@ -93,11 +119,22 @@ std::vector<size_t> Hyphenator::breakOffsets(const std::string& word, const bool
}
auto cps = collectCodepoints(word);
trimTrailingPunctuation(cps);
trimSurroundingPunctuation(cps);
if (cps.size() < MIN_PREFIX_CP + MIN_SUFFIX_CP) {
return {};
}
if (auto explicitIndexes = collectExplicitHyphenIndexes(cps); !explicitIndexes.empty()) {
std::sort(explicitIndexes.begin(), explicitIndexes.end());
explicitIndexes.erase(std::unique(explicitIndexes.begin(), explicitIndexes.end()), explicitIndexes.end());
std::vector<size_t> byteOffsets;
byteOffsets.reserve(explicitIndexes.size());
for (const size_t idx : explicitIndexes) {
byteOffsets.push_back(byteOffsetForIndex(cps, idx));
}
return byteOffsets;
}
std::vector<size_t> indexes = hasOnlyAlphabetic(cps) ? collectBreakIndexes(cps) : std::vector<size_t>();
if (includeFallback) {
for (size_t idx = MIN_PREFIX_CP; idx + MIN_SUFFIX_CP <= cps.size(); ++idx) {