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Pull Request Overview
This PR implements the cycle-spacing command, which provides Emacs-style whitespace cycling functionality. The command cycles through three states when invoked repeatedly: replacing multiple spaces/tabs with a single space, deleting all whitespace, and restoring the original spacing.
Key Changes:
- Implements core
CycleSpacingcommand class with state management and interruption handling - Adds comprehensive test coverage for various scenarios including multi-cursor support, tabs, mixed whitespace, and edge cases
- Registers command bindings across multiple keybinding configurations
Reviewed Changes
Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
| src/commands/edit.ts | Implements the CycleSpacing command class with cycling logic, state management, and cursor positioning |
| src/emulator.ts | Registers the CycleSpacing command in the emulator's command list |
| src/extension.ts | Binds the cycleSpacing command to make it available as a VS Code command |
| package.json | Adds keybindings for the cycleSpacing command across different meta prefix configurations |
| keybindings/move-edit.json | Adds the base keybinding entry for cycleSpacing using meta+space |
| src/test/suite/commands/edit.cycle-spacing.test.ts | Comprehensive test suite covering basic cycling, multi-cursor, tabs, interruption handling, and edge cases |
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| let from = cursorChar; | ||
| while (from > 0) { | ||
| const char = lineText[from - 1]; | ||
| if (char !== " " && char !== "\t") { | ||
| break; | ||
| } | ||
| from -= 1; | ||
| } |
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The whitespace detection logic is duplicated in two while loops. Consider extracting this into a helper function like isWhitespace(char: string): boolean to improve maintainability and make the code more DRY.
| const newPos = new vscode.Position(line, original.from + original.before.length); | ||
| return new Selection(newPos, newPos); | ||
| } | ||
| } |
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This fallback case returns the current selection unchanged, but it's unclear when this would be reached since all three states (0, 1, 2) are explicitly handled. Consider adding a comment explaining when this fallback occurs or refactoring to make the logic clearer.
| } | |
| } | |
| // This fallback should never be reached because all three states (0, 1, 2) are explicitly handled above. | |
| // If reached, it indicates an unexpected state; returning the current selection unchanged as a safeguard. |
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