fluent_2_core 0.0.3

Shared Fluent 2 design tokens and theming. Consumed by every fluent_2_* UI package.

0.0.3

Added

• FluentScrollBehavior now supplies a scrollbar. buildScrollbar returned its child unchanged, on a doc comment claiming Fluent drew its own scrollbar in the UI packages — it did not. fluent_2 contained no scrollbar at all, FluentColors.scrollbarOverlay (upstream colorScrollbarOverlay) was referenced by nothing, and the showroom had to hand-roll a RawScrollbar with a hardcoded thumb colour to get one. Every consuming app inherited a scrollbar-less UI with no way to opt back in short of replacing the class. It is now a RawScrollbar — from package:flutter/widgets.dart, so still no Material dependency — painted in colorScrollbarOverlay, on vertical scrollers on desktop platforms only. This is a visible change in every app using FluentApp. Pass your own scrollBehavior to opt out.

Added

• React parity is now pinned by a test. test/token_parity_test.dart checks all 228 alias tokens across the four theme variants against a machine-generated snapshot of the real @fluentui/react-theme themes (test/fixtures/react_tokens.json, regenerated with node tool/dump_react_tokens.js). It asserts three things: every token with a React counterpart matches it; the deliberate divergences are exactly the pinned ones — a divergence that disappears fails just as loudly as one that appears, so nobody diffing against React can quietly restore the black-on-black high contrast foregrounds; and the Dart-only tokens are pinned, so adding one is a conscious act rather than a typo that is never compared against anything.

Fixed

• Four status colours did not match Fluent UI React v9. Diffed all 228 alias tokens across the four theme variants against @fluentui/react-theme (9.2.1, re-checked against 9.2.2): 860 of 864 values matched. The four that did not were transcription slips in the dark column only — colorStatusSuccessForegroundInverted (both brightnesses), colorStatusWarningForeground1, colorStatusWarningForeground3 and colorStatusWarningBorder1 — where the dark warning ramp had values in the wrong slots (dark WarningForeground3 held React's light WarningBorder1 value). Now matches React exactly.

  The remaining four differences are deliberate and stay: in high contrast, colorNeutralForegroundInverted and its hover/pressed/selected siblings are white where React is #000000. React's value pairs black on a black colorNeutralBackgroundInverted, which renders every inverted surface — tooltip, popover, teaching popover — outlined but empty. See the note at tokens/theme_variants.dart:252.

  Also confirmed: 12 Dart tokens have no React counterpart (colorStatusSevere*, colorStatusAvailableForeground3, colorStatusAwayBackground3, colorStatusOofForeground3). These are genuine extensions backing FluentPresenceBadge and the severe ramp — React sources those at component level rather than promoting them to theme aliases.

• FluentPageRoute no longer allocates a CurvedAnimation per frame. buildTransitions runs from the route's own AnimatedBuilder, so every frame of a transition built — and never disposed — a new curve holding a status listener on its parent. It is now built once and disposed with the route.

• FluentThemeOverride no longer takes a theme dependency when it has nothing to override. It read the ancestor theme before its own early return, so a no-op override rebuilt its whole subtree on any ancestor theme change.

0.0.2

• Use the Fluent 2 project logo as the pub.dev thumbnail.
• Require fluent_2_fonts 0.0.2.

0.0.1

• Initial release: Fluent 2 token tables (color, typography, spacing, radius, stroke, elevation, motion), FluentTheme / FluentThemeData, FluentApp, the light / dark / teamsDark / highContrast variants, and a Dart port of the Theme Designer brand-ramp generator.
• Use the open-source Selawik family from fluent_2_fonts for the web and Windows typography ramp instead of selecting Segoe UI.
• Select distinct Web, Windows, macOS, iOS, and Android typography metrics and expose fontPlatform for explicit previews.
• Preload the build-selected dynamic font before FluentApp paints.