flutter/dev/tools/gen_defaults
Greg Spencer 31719941c0
Time picker precursors (#116450)
* Make some minor changes in preparation for updating the Time Picker to M3

* Revert OutlineInputBorder.borderRadius type change

* Revert more OutlineInputBorder.borderRadius changes.
2022-12-07 02:07:25 +00:00
..
2022-11-30 19:13:00 +00:00
2022-11-27 22:08:48 -08:00
2022-12-07 02:07:25 +00:00

Token Defaults Generator

Script that generates widget component theme data defaults based on the Material Token database. These tokens were extracted into a JSON file from an internal Google database.

Usage

Run this program from the root of the git repository:

dart dev/tools/gen_defaults/bin/gen_defaults.dart

Templates

There is a template file for every component that needs defaults from the token database. These templates are implemented as subclasses of TokenTemplate. This base class provides some utilities and a structure for adding a new block of generated code to the bottom of a given file.

Templates need to override the generate method to provide the generated code block as a string. The tokens are represented as a Map<String, dynamic> that is loaded from data/material-tokens.json. Templates can look up whatever properties are needed in this structure to provide the properties needed for the component.

See lib/fab_template.dart for an example that generates defaults for the Floating Action Button.