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theme_extensions_builder

7.5.07.9K downloads/mopro100andrey/theme_extensions_builder ↗New releases in your daily digest, changelog included.

Code generator for Flutter's 3.0 ThemeExtension classes. theme_extensions_builder generator helps to minimize the required boilerplate code.

Last release 1 months ago
06 Sep 2026
Release timing varies
gaps range from 9 days to 10 months
Nearly every release is documented
notes for 28 of 28 stable releases
Nothing withdrawn
no release was ever pulled
4 years old
32 releases · first in 2022

Release timeline

32 releases since 2022

2022202320242025

Releases

7.5.06 Sept 2026
Breaking: hashCode changes for classes that inherit fields, which now come after the class' own.
Breaking: hashCode changes for classes that inherit fields, which now come after the class' own.

Changed: lerp keeps the endpoints when one side is null (t = 0 gives a, t = 1 gives b), and merge keeps the current value when the incoming one is null.

New: The annotated class is validated before generation. A missing constructor, a field without a named parameter, a required parameter the generated code cannot pass, a generic class, a missing with _$X, a field named copyWith, merge or lerp, a @ThemeExtensions class not extending ThemeExtension<Self>, or an invalid contextAccessorName now stop the build with a message naming the class and the fix.

Fixed: Generated code that did not compile for an instance lerp on a nullable field or with a nullable result, a non-nullable lerp/merge parameter on a nullable field, a static call on Box<int> instead of Box, a method declared on a supertype (the result is cast back), a generic field type (methods resolve through the instantiated type), and a field inherited from a generic superclass (T is substituted).

Fixed: An unrelated lerp or merge no longer fails the build or is mistaken for a supported one; an unusable signature is a build warning naming the field and its fallback.

Fixed: A WidgetStateProperty generic has to offer a static lerp that accepts nulls, and is reported once when it does not; a non-nullable generic is an error at the field, a nested one falls back; double and Duration generics are detected by element.

Fixed: Field collection follows Dart's resolution: a narrowed field keeps the narrowed type, mixins win over the superclass chain, implements contributes nothing, private and static fields are skipped, and @ignore on a redeclaration drops the inherited one. Duration is detected by element.

Fixed: A field typed as a @ThemeGen class, or a subclass of one, merges the same way on clean and incremental builds; a hand-written merge is used as declared.

Fixed: const follows the constructor named in constructor:; constructor: '' selects the unnamed one.

Fixed: Annotations are matched by package as well as by name, so a user class called ThemeGen is not taken for one.

Fixed: The example is published without its workspace-only files, so it resolves when copied from pub.dev.

Updated: Analyzer >=13.1.0 <15.0.0 (the lower bound CI tests against) and Dart SDK >=3.13.0 <4.0.0; collection and meta are no longer dependencies; the platforms key is gone from the pubspec.

From the same repository

pro100andrey/theme_extensions_builder

theme_extensions_builder_annotationpub.devAnnotations for the theme_extensions_builder. This package does nothing without theme_extensions_builder.

One column per quarter.

7.4.015 Jun 20262 sources agree

*Updated*: Analyzer dependency to ">=9.0.0 <14.0.0"

Updated: Analyzer dependency to ">=9.0.0 <14.0.0"
Updated: source_gen lower bound to ">=4.2.3" for analyzer 12/13 compatibility.

Open source →

7.3.022 Mar 20262 sources agree

*Updated*: Analyzer dependency to ">=9.0.0 <11.0.0".

Updated: Analyzer dependency to ">=9.0.0 <11.0.0".
Updated: Dependencies in example and annotation packages.

Open source →

7.2.120 Mar 20262 sources agree

*Update*: Improved documentation.

Update: Improved documentation.

Open source →

7.2.026 Jan 20262 sources agree

New Feature: Added support for WidgetStateProperty.lerp with 4-parameter signature - #33

New Feature: Added support for WidgetStateProperty.lerp with 4-parameter signature - #33
New Feature: Added WidgetStatePropertyLerp class for proper code generation of WidgetStateProperty types with validation for nullable generics
Improvement: Enhanced lerp method handling for instance methods with optional results, ensuring correct null safety and type casting
Improvement: Updated code generation logic in both @ThemeExtensions and @ThemeGen to handle WidgetStateProperty fields with appropriate inner lerp functions
Improvement: Refactored internal analysis logic to better validate parameter types and method signatures for lerp methods
Improvement: Added validation that throws descriptive errors when WidgetStateProperty is used with non-nullable generic types
Testing: Expanded test suite with new test cases for WidgetStateProperty and instance lerp with optional results
Code Quality: Made generator constructors const and cleaned up imports
Updated: Dependencies to latest versions for improved compatibility

Open source →

7.1.01 Dec 20252 sources agree

Documentation: Improved internal code comments for better understanding of the codebase

Documentation: Improved internal code comments for better understanding of the codebase
Documentation: Added .github/README.md with quick start guide and installation instructions
Documentation: Separated and clarified @ThemeExtensions vs @ThemeGen usage patterns
Example: Enhanced example app with 5 comprehensive theme extensions:
- ButtonThemeExtension - Complete button system with variants (primary, secondary, outlined, text) and sizes
- TypographyThemeExtension - Full typography scale (display, headline, body, label, code styles)
- SpacingThemeExtension - Consistent spacing system for layouts
- CardThemeExtension - Customizable card components
- AppThemeExtension - Application-level colors and layout modes
Example: Added multi-page navigation with NavigationBar showcasing different features
Example: Custom button component with loading and disabled states
Example: Typography and button showcase pages
Example: Updated README with detailed feature descriptions and project structure
Improvement: Added more unit tests for better coverage
Improvement: Updated dependencies to latest versions
Fixes: Various bug fixes and stability improvements

Open source →

7.0.123 Nov 20252 sources agree

Improvement: Updated == operator to check runtimeType.

Improvement: Updated == operator to check runtimeType.
Improvement: Internal variable renaming in generated code to avoid conflicts.

Open source →

7.0.021 Nov 2025Breaking2 sources agree

Breaking changes: Removed deprecated _$ThemeExtensionMixin mixin. Use _$[ClassName]Mixin instead.

Breaking changes: Removed deprecated _$ThemeExtensionMixin mixin. Use _$[ClassName]Mixin instead.
New Feature: Added constructor parameter to @ThemeExtensions and @ThemeGen annotations, allowing you to specify a custom constructor name.
Improvement: Added support for inheriting fields from superclasses in both @ThemeExtensions and @ThemeGen generators.
Improvement: Optimized equality checks (== operator) to use type checking with is! instead of runtimeType comparison.
Improvement: Added == and hashCode implementations to FieldInfo class for better comparison support.
Updated: Dependencies to latest versions.
Fixes: Various bug fixes and improvements - issues/27, issues/28, Special thanks to nank1ro! for finding and reporting issues.

Open source →

6.0.13 Oct 20252 sources agree

*Fixed*: lerpDuration$, lerpDouble$ calculation in case of null values.

Fixed: lerpDuration$, lerpDouble$ calculation in case of null values.

Open source →

6.0.02 Oct 20252 sources agree

*Added*: lerpDuration property.

Added: lerpDuration property.
Added: ThemeGen annotation for theme generation.

Open source →

6.0.0-dev.42 Oct 2025pre-release

Nothing published for this version

6.0.0-dev.31 Oct 2025pre-release

Nothing published for this version

6.0.0-dev.230 Sept 2025pre-release

Nothing published for this version

6.0.0-dev.124 Sept 2025pre-release

Nothing published for this version

5.1.117 Sept 20252 sources agree

Bug Fix: Resolved an issue in the Object.hashAll implementation that caused incorrect hash code generation when a theme extension contained more than

Bug Fix: Resolved an issue in the Object.hashAll implementation that caused incorrect hash code generation when a theme extension contained more than 20 fields.
Dependency Updates: Updated build and source_gen dependencies to ensure compatibility with the latest versions.

Open source →

5.1.025 Aug 2025Deprecated2 sources agree

`_$ThemeExtensionMixin` is Deprecated: To support multiple extensions per file, the use of with _$ThemeExtensionMixin has been deprecated. Please use…

New Features

Improved Code Generation: Now using the code_builder library for generating theme extensions, which results in more structured and reliable code.
Multiple Extensions per File: Added support for defining multiple theme extensions within a single file.
New @ThemeExtension Annotation Property: The contextAccessorName property has been added to the @ThemeExtensions annotation, allowing you to customize the accessor name for your theme extension on BuildContext.
Automatic lerp Method Generation: The generator now automatically creates lerp methods for double and other ThemeExtension types, simplifying their use in animations.
Optimized lerp for non-interpolated types: lerp method generation for types that do not have a lerp method now uses a ternary operator (t < 0.5 ? value : otherValue). This ensures a more efficient and predictable transition between values.

Deprecations

_$ThemeExtensionMixin is Deprecated: To support multiple extensions per file, the use of with _$ThemeExtensionMixin has been deprecated. Please use the newly generated mixin with _\$[ClassName]Mixin instead.

Open source →

5.1.0+126 Aug 20252 sources agree

- Fixed typo's