icomoon_selection_gen

A simple source generator for icomoon selection.json file, you can use it to generate a similar class as the Icons material class.

Not published

I'm just making this open source so people can look at the code.

Why write it then?

I was just trying to write a code generator and got this idea after some "manual codegen", so I'm not planning to publish it on pub.dev, and I'm kinda lazy to make the desired build flags work (see TODOs)

How to install then?

Just ref this git repo on pubspec.yaml

dev_dependencies:
  ...
  icomoon_selection_gen:
    git:
      url: git://github.com/Grohden/icomoon-selection-gen
      ref: v0.0.1

To keep it working and not get a surprising error, use the git tags/versions on url.

Usage

I'm assuming you already know how to use icomoon.

After you choose the place for your files (selection.json and icomoon.ttf)

# your pubspec probably has something like this:
  fonts:
    - family: Icomoon # this is the font_name prop for build.yaml
      fonts:
        - asset: lib/assets/icons/icomoon.ttf

Configure your build.yaml

targets:
  $default:
    builders:
      icomoon_selection_gen:
        generate_for:
          - lib/assets/icons/selection.json
        options:
          font_name: Icomoon # same as the `family` prop in pubspec.yaml

If it's correctly configured, you can run the flutter packages pub run build_runner build and you will get a file named selection.dart with a Icomoon class with static IconData like this:

class Icomoon {
  Icomoon._();

  static const _kFontFam = 'Icomoon';
  
  // Names are the snake_case version of the original ones (the ones you've set on icomoon)
  static const IconData my_icon = IconData(0xe941, fontFamily: _kFontFam);
}

so you can use it like:

const myIcon = Icon(Icomoon.my_icon);

TODO

I may (and wish to) do these:

• support custom name for the .json file (you can only use selection.json as the name)
  • See generate_for
• support custom name for the generated file - (builder is confusing in this part)
• support for custom location for the generated file
• Try again source_gen to be able to support ignore_for_file - had problems because source_gen is basically only for dart (not json) files
• Add test cases