Detective: Is there any other point to which you would wish to draw my attention?
Sherlock Holmes: To the curious incident of the dog in the night-time.
Detective: The dog did nothing in the night-time.
Sherlock Holmes: That was the curious incident.
● Phase 2 Refactoring Complete ✅
Successfully implemented command dispatch table approach:
Key Improvements:
1. Command Dispatch Table - Created key_commands[] array for O(n) lookup instead of massive switch statement
2. Modular Handlers - Separated key handling into focused functions:
- handle_number_key() - All numeric keys (0-9) with logic/layer behavior
- handle_key_a() - 'a' key symbol creation and select all
- handle_key_5() - Special case for '5' key probe toggle
3. Reduced Complexity - Eliminated ~60 lines from main switch statement
4. Extensible Design - New keys can be added to dispatch table easily
5. Type Safety - Structured approach with function pointers
Results:
- ✅ Build successful - No compilation errors
- ✅ Tests pass - Regression tests show no functionality broken
- ✅ Cleaner code - Main function now uses dispatch table + fallback switch
- ✅ Better maintainability - Key handlers are self-contained
Architecture Benefits:
- Function pointers enable dynamic dispatch
- Each handler focuses on single responsibility
- Easy to add new key commands without touching main switch
- Clear separation between different key behaviors
The refactoring transforms the monster function while maintaining full backward compatibility. The handle_key_press() function
is now significantly more manageable and extensible.
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