Improve performance and readablility of Pinyin Alphabet #3825
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VictoriousRaptor
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Pull Request Overview
This PR optimizes Pinyin translation by replacing regex-based Chinese detection with custom span-based checks, refactors naming for clarity, and adds more granular exception handling when loading the double-pinyin table.
- Replace
WordsHelper.HasChinesewithContainsChinese/IsChineseCharacterfor faster detection. - Rename fields/methods (
constructed→_isConstructed,endConstruct→EndConstruct,ToDoublePin→ToDoublePinyin) and adopt target-typednew. - Enhance
LoadDoublePinyinTableto catch specific I/O exceptions and validate deserialization.
Reviewed Changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.
| File | Description |
|---|---|
| TranslationMapping.cs | Renamed construction flag and collection, standardized method names and exception messages |
| PinyinAlphabet.cs | Introduced ContainsChinese/IsChineseCharacter, pre-allocate StringBuilder, detailed catch blocks, renamed helper methods |
Comments suppressed due to low confidence (3)
Flow.Launcher.Infrastructure/PinyinAlphabet.cs:156
- The doc comment claims comprehensive coverage but
IsChineseCharacteronly checks Unified Ideographs and Extension A; update the comment or extend the method to include additional CJK ranges if needed.
/// Optimized Chinese character detection using the comprehensive CJK Unicode ranges
Flow.Launcher.Infrastructure/TranslationMapping.cs:29
- [nitpick] The method name
EndConstructis a bit opaque; consider renaming toCompleteConstructionorFinalizeMappingto clearly convey its purpose.
public void EndConstruct()
Flow.Launcher.Infrastructure/PinyinAlphabet.cs:158
- Add unit tests for
ContainsChineseandIsChineseCharacter(including edge cases) as well as for the table-loading paths (missing file, invalid JSON, missing schema) to ensure proper behavior across scenarios.
private static bool ContainsChinese(ReadOnlySpan<char> text)
📝 WalkthroughWalkthroughThe changes update error handling, internal logic, and naming conventions in the Changes
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🔇 Additional comments (3)
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Actionable comments posted: 0
🧹 Nitpick comments (2)
Flow.Launcher.Infrastructure/PinyinAlphabet.cs (2)
158-176: Excellent performance optimization for Chinese character detection!The custom Unicode range check should be significantly faster than regex-based detection. The implementation covers the most commonly used Chinese characters.
Note: The current ranges cover CJK Unified Ideographs (U+4E00-U+9FFF) and Extension A (U+3400-U+4DBF). For completeness, you might consider adding:
- CJK Extension B-G (U+20000-U+2CEAF)
- CJK Compatibility Ideographs (U+F900-U+FAFF)
However, these are rarely used in practice, so the current implementation should suffice for most use cases.
113-113: Consider adjusting StringBuilder capacity calculationThe pre-allocation of 3-4 characters seems too small for typical use cases. Consider calculating based on content length to avoid multiple resizes:
-var resultBuilder = new StringBuilder(_settings.UseDoublePinyin ? 3 : 4); // Pre-allocate with estimated capacity +// Estimate: average pinyin length * character count + spaces +var estimatedCapacity = content.Length * (_settings.UseDoublePinyin ? 2 : 4) + content.Length; +var resultBuilder = new StringBuilder(estimatedCapacity);
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Flow.Launcher.Infrastructure/PinyinAlphabet.cs(2 hunks)Flow.Launcher.Infrastructure/TranslationMapping.cs(1 hunks)
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Flow.Launcher.Infrastructure/TranslationMapping.cs
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🔇 Additional comments (4)
Flow.Launcher.Infrastructure/TranslationMapping.cs (1)
9-34: Good refactoring to follow C# naming conventions!The changes improve code consistency:
- Private fields now use underscore prefix (
_isConstructed,_originalToTranslated)- Public method renamed to PascalCase (
EndConstruct)- Clearer variable naming (
searchResultinstead ofloc)- Improved error message clarity ("after construction" vs "after constructed")
Flow.Launcher.Infrastructure/PinyinAlphabet.cs (3)
17-17: Good defensive programming improvements!Making
_pinyinCachereadonly and adding null check for deserialization result improves code robustness.Also applies to: 45-48
61-67: Excellent optimization with early return and correct Path API usage!
- Early return when double pinyin is disabled avoids unnecessary file I/O
Path.Combineis the correct choice here as it properly handles directory separators across platforms, unlikePath.Joinwhich simply concatenates
73-87: Great improvement in exception handling granularity!Catching specific exceptions with tailored log messages will significantly improve debugging and troubleshooting capabilities.
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@jjw24 Could you please add CJK to recognized word list? 
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Let's do it in this PR. |
Have no idea about how to do that |
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