stroke_morph_icons

Lucide, Tabler and Heroicons icon data as ready-to-use stroke_morph constants.

dependencies:
  stroke_morph_icons: ^0.1.0

import 'package:stroke_morph_icons/lucide.dart';

MorphIcon(icon: open ? MorphLucideIcons.x : MorphLucideIcons.menu)

One dependency, one import. Each pack library re-exports stroke_morph, so naming an icon also brings MorphIcon, MorphController and the rest of the engine into scope — importing package:stroke_morph/stroke_morph.dart alongside it is redundant.

Each pack is one class of static consts, so the import needs no prefix and the packs cannot collide.

All three are stroke packs drawn on the same 24×24 grid, so they share a coordinate space: any icon morphs into any other, across packs, with no fitIcon re-grid.

MorphIcon(from: MorphLucideIcons.menu, to: MorphHeroicons.xMark, progress: t)

Lucide and Tabler publish exactly the [tag, attrs] shape morphicons consumes, so those constants are a transcription of the upstream data, not a conversion. Heroicons publishes SVG files instead, and tool/svg_to_nodes.dart turns them into that same shape first — still a transcription, one step longer. Both generators are checked in — see below.

Only outline styles are here. Heroicons' solid, mini and micro styles are filled silhouettes, several with fill-rule holes; stroke_morph would morph their outline quite happily, but the result is not the icon. Tabler's filled style is left out for the same reason. Heroicons outline is drawn at stroke-width 1.5, so MorphIcon(strokeWidth: 1.5) reproduces the pack's own weight — the default 2 is Lucide's.

Names are camelCased from the upstream name — arrow-right becomes arrowRight. The five in Lucide and Tabler that collide with Dart keywords take an Icon suffix: importIcon, switchIcon, functionIcon, libraryIcon, factoryIcon. The same escape covers anything that cannot be a static member (byName, hashCode, toString, runtimeType, noSuchMethod).

Tree-shaking

Every icon is its own static const on the pack class — a field the compiler retains one by one — so an app links only the ones it names. A const map is the opposite: it is retained whole the moment anything touches it, dragging the entire pack into the bundle. There is exactly one such map, and naming it is your opt-in:

MorphIcon(icon: MorphLucideIcons.byName[nameFromServer]);   // retains ALL 1 756

Use it for galleries and name-driven lookups. For a fixed set of icons, name the constants directly.

Regenerating

npm pack lucide-static @tabler/icons heroicons   # anywhere, then extract

# Lucide and Tabler ship the node JSON already.
dart run tool/gen_icons.dart --pack lucide --version 1.28.0 \
  --input path/to/icon-nodes.json
dart run tool/gen_icons.dart --pack tabler --version 3.46.0 \
  --input path/to/tabler-nodes-outline.json

# Heroicons ships SVG, so it needs the transcription pass first.
dart run tool/svg_to_nodes.dart --input path/to/heroicons/24/outline \
  --output /tmp/heroicons-outline.json
dart run tool/gen_icons.dart --pack heroicons --version 2.2.0 \
  --input /tmp/heroicons-outline.json

dart format .          # generated files are house-style too

Both tools fail loudly rather than guessing. gen_icons.dart throws with both upstream names if two would produce the same Dart identifier. svg_to_nodes.dart stops on anything its scan does not fully understand — an unknown tag, a <g>, a transform, a filled path, a viewBox that is not 0 0 24 24 — naming the file. An off-grid pack is not an error in itself; it just needs a fitIcon decision from whoever adds it, which is exactly what the stop is for.

Licence

This package is MIT. Lucide is ISC; Tabler Icons and Heroicons are MIT. All three licences travel with the icon data — see the repository LICENSE and the upstream projects.