fix: stabilize undo/redo logic through refactoring #125
Conversation
![gemini-code-assist[bot]](https://avatars.githubusercontent.com/in/956858?s=60&v=4){kind=small}
There was a problem hiding this comment.
Summary of Changes
Hello @MinCrohn, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request introduces a fundamental overhaul of the application's undo/redo capabilities by implementing the Command Pattern. This refactoring not only stabilizes the history management but also provides more granular control over data updates through an enhanced mergeStrategy option. The changes are supported by new, robust data comparison utilities and extensive test coverage, ensuring a more reliable and predictable user experience.
Highlights
- Undo/Redo System Refactor (Command Pattern): I've completely redesigned the undo/redo logic to leverage the Command Pattern. This significantly enhances the stability and scalability of history management by encapsulating operations as discrete, reversible commands. A new
UpdateCommandclass now handles recording changes made via theupdatemethod, allowing for precise state restoration during undo/redo operations. - Enhanced
updateMethod withmergeStrategy: Theupdatemethod now features a more powerfulmergeStrategyoption, replacing the previousarrayMerge. This new option provides explicit control over how changes are applied:'merge'performs a deep merge, while'replace'entirely replaces top-level properties. This is particularly useful for complex data structures and ensuring accurate undo operations. - Improved Data Diffing and Comparison Utilities: I've introduced new, more robust utility functions for object comparison and diffing:
isSamefor deep equality checks,createPatchfor generating granular change sets, anddiffReplacefor capturing full property replacements. These new utilities underpin the stability of the updated undo/redo system and themergeStrategy. - Comprehensive Undo/Redo Test Coverage: Extensive new test suites have been added for the
UndoRedoManagerand for undo/redo functionality across various component types (Background, Bar, Grid, Group, Icon, Relations, Text). This significantly increases the reliability and predictability of the feature. - Schema and Mixin Alignments: Various data schemas (
component-schema.js,primitive-schema.js,data.d.ts) and display mixins (Base.js,Childrenable.js,Componentsable.js,Relationstyleable.js,Textstyleable.js) have been updated to integrate with the newmergeStrategyand provide more consistent default values and type definitions.
Using Gemini Code Assist
The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.
Invoking Gemini
You can request assistance from Gemini at any point in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.
| Feature | Command | Description |
|---|---|---|
| Code Review | /gemini review |
Performs a code review for the current pull request in its current state. |
| Pull Request Summary | /gemini summary |
Provides a summary of the current pull request in its current state. |
| Comment | @gemini-code-assist | Responds in comments when explicitly tagged, both in issue comments and review comments. |
| Help | /gemini help |
Displays a list of available commands. |
Customization
To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.
Limitations & Feedback
Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments or fill out our survey to provide feedback.
You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.
Footnotes
-
Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩
There was a problem hiding this comment.
Code Review
This pull request introduces a major refactoring of the undo/redo logic using the Command Pattern. The mergeStrategy option clarifies update behaviors, and the new diffing utilities (isSame, diffReplace) are a significant improvement. Extensive unit tests increase confidence in these changes.
There are a few critical issues in the new UpdateCommand implementation related to state restoration and cloning that could lead to incorrect undo behavior. Addressing these should make the new implementation robust.
There was a problem hiding this comment.
Summary of Changes
Hello @MinCrohn, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request significantly overhauls the application's undo/redo capabilities by adopting a robust Command Pattern architecture. This refactoring enhances the stability and scalability of state management, providing more predictable data updates through a new mergeStrategy option. The changes are supported by new, precise diffing utilities and extensive test coverage, ensuring the reliability of the new system.
Highlights
- Core Undo/Redo System Re-architecture: The undo/redo mechanism has been fundamentally redesigned using the Command Pattern, introducing a new
UpdateCommandclass and streamlining theUndoRedoManager. This aims to significantly improve stability and scalability for state changes. - Enhanced Data Update Control (
mergeStrategy): Theupdatemethod now utilizes a more flexiblemergeStrategyoption (replacing the previousarrayMerge) to precisely control how changes are applied, including a 'replace' strategy that is crucial for accurate undo operations. - Robust Diffing Utilities: New internal utilities (
is-same.js,create-patch.js,diff-replace.js) have been implemented for more accurate and comprehensive detection of changes between data states, providing a solid foundation for the new undo/redo system. - Comprehensive Undo/Redo Test Coverage: Extensive new test suites have been added to validate the stability and correctness of the undo/redo functionality across various component types (Background, Bar, Grid, Group, Icon, Text), ensuring the reliability of the new system.
- Schema and Default Value Refinements: Data schemas and default values for various component properties (e.g.,
tint,style,padding) have been updated for consistency and to better support the new update and undo/redo behaviors.
Using Gemini Code Assist
The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.
Invoking Gemini
You can request assistance from Gemini at any point in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.
| Feature | Command | Description |
|---|---|---|
| Code Review | /gemini review |
Performs a code review for the current pull request in its current state. |
| Pull Request Summary | /gemini summary |
Provides a summary of the current pull request in its current state. |
| Comment | @gemini-code-assist | Responds in comments when explicitly tagged, both in issue comments and review comments. |
| Help | /gemini help |
Displays a list of available commands. |
Customization
To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.
Limitations & Feedback
Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments or fill out our survey to provide feedback.
You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.
Footnotes
-
Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩
There was a problem hiding this comment.
Code Review
The pull request refactors the undo/redo logic using the Command Pattern, enhancing stability and scalability. The mergeStrategy option provides clearer control over data update behavior, and extensive test coverage increases feature reliability. A critical issue was identified in src/command/commands/update.js regarding property addition handling during undo/redo, which needs to be addressed.
|
/gemini review |
There was a problem hiding this comment.
Code Review
This is an excellent and comprehensive refactoring of the undo/redo system. The introduction of the Command Pattern, the new UpdateCommand, and the robust mergeStrategy significantly improve the stability and predictability of state changes. The addition of extensive test suites for both the UndoRedoManager and the undo/redo behavior of individual components is a huge win for the project's reliability.
I've identified a couple of areas for improvement: one important bug in how new properties are handled by the UpdateCommand's undo logic, and a suggestion to improve the robustness of font style handling.
|
/gemini review |
There was a problem hiding this comment.
Code Review
The Undo/Redo logic has been refactored using the Command Pattern, enhancing stability and scalability. The mergeStrategy option improves data update predictability, and extensive test coverage increases feature reliability. A potential issue with the _deepClone implementation in UpdateCommand was identified, which could affect the stability of the undo stack in edge cases.
|
/gemini review |
There was a problem hiding this comment.
Code Review
This is an excellent and substantial refactoring of the undo/redo logic. The move to the Command Pattern with a dedicated UpdateCommand greatly improves the stability and scalability of this feature. The introduction of mergeStrategy is a clear improvement over arrayMerge.
I'm particularly impressed with:
- The comprehensive new test suite for the undo/redo functionality across various components. This significantly increases confidence in the new implementation.
- The replacement of the old diffing logic with the much more robust
isSameanddiffReplaceutilities, also backed by thorough tests. - The schema enhancements to include default values, which centralizes configuration and improves predictability.
|
/gemini review |
There was a problem hiding this comment.
Code Review
This is an excellent and comprehensive refactoring of the undo/redo logic. The introduction of the Command Pattern, the new UpdateCommand, and the switch to mergeStrategy significantly improve the system's stability, clarity, and scalability. The schema updates with stricter validation and better defaults are a great enhancement for maintainability. The addition of extensive test suites for both the UndoRedoManager and the undo/redo functionality across various components is a fantastic contribution to the project's reliability.
|
/gemini review |
There was a problem hiding this comment.
Code Review
This pull request introduces a Command Pattern-based undo/redo logic, enhancing stability and maintainability. The mergeStrategy option offers improved control over data updates, and the new tests provide excellent coverage. I've identified a critical issue related to null value handling in _createPreviousState function that could cause runtime errors. Addressing this will make the PR ready for merging.
|
/gemini review |
There was a problem hiding this comment.
Code Review
This is an excellent pull request that refactors the undo/redo logic using the Command Pattern, significantly improving stability and scalability. The new mergeStrategy option and the centralization of default values in schemas are great enhancements for clarity and maintainability. The addition of extensive test coverage is particularly commendable.
I've found one critical issue with the Text component that will likely prevent it from being styled correctly. I've also pointed out two medium-severity issues regarding potential edge cases in the new undo/redo logic. Addressing these points will make this impressive refactoring even more robust.
The Undo/Redo logic has been redesigned based on the Command Pattern to significantly improve stability and scalability. The
mergeStrategyoption has been enhanced for more predictable data update behavior, and extensive test coverage has been added to increase feature reliability.