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fix: truncating chapter titles using UTF-8 safe function (#599)

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## Summary

* Truncating chapter titles using utf8 safe functions (Cyrillic titles
were split mid codepoint)
* refactoring of lib/Utf8

---

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This commit is contained in:
Arthur Tazhitdinov
2026-02-01 16:23:48 +05:00
committed by GitHub
parent 0d82b03981
commit b1dcb7733b
8 changed files with 45 additions and 40 deletions
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19
src/util/StringUtils.cpp
View File

@@ -61,23 +61,4 @@ bool checkFileExtension(const String& fileName, const char* extension) {
return localFile.endsWith(localExtension);
}
size_t utf8RemoveLastChar(std::string& str) {
if (str.empty()) return 0;
size_t pos = str.size() - 1;
// Walk back to find the start of the last UTF-8 character
// UTF-8 continuation bytes start with 10xxxxxx (0x80-0xBF)
while (pos > 0 && (static_cast<unsigned char>(str[pos]) & 0xC0) == 0x80) {
--pos;
}
str.resize(pos);
return pos;
}
// Truncate string by removing N UTF-8 characters from the end
void utf8TruncateChars(std::string& str, const size_t numChars) {
for (size_t i = 0; i < numChars && !str.empty(); ++i) {
utf8RemoveLastChar(str);
}
}
} // namespace StringUtils

6
src/util/StringUtils.h
View File

@@ -19,10 +19,4 @@ std::string sanitizeFilename(const std::string& name, size_t maxLength = 100);
bool checkFileExtension(const std::string& fileName, const char* extension);
bool checkFileExtension(const String& fileName, const char* extension);
// UTF-8 safe string truncation - removes one character from the end
// Returns the new size after removing one UTF-8 character
size_t utf8RemoveLastChar(std::string& str);
// Truncate string by removing N UTF-8 characters from the end
void utf8TruncateChars(std::string& str, size_t numChars);
} // namespace StringUtils