feat: bundle Google Sans and Google Sans Code instead of fetching them - #50
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Both faces now ship in packages/flow_ui/fonts/ under the OFL, declared under `flutter: fonts:` with every cut and addressed as package: 'flow_ui'. google_fonts is dropped, so hosts need neither android.permission.INTERNET nor com.apple.security.network.client, and no text renders in a fallback face while a cut is in flight. Google Sans ships as a Latin subset: the upstream cuts are ~1.95 MB each, most of it scripts a chat UI already gets from the platform face. The whole set compresses to 1 MB. tool/subset_fonts.sh rebuilds the directory. With every cut declared, the compromises the fetch forced come back out: FlowTypography.standard and FlowTheme.typography are const again, code and codeInline are plain fields with const defaults, and recut — which existed only to reach google_fonts' per-cut families — is deprecated in favour of copyWith.
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Navigate logical layers of code changes, visualize relationships, and explore their blast radius. 📝 WalkthroughWalkthroughThe ChangesBundled typography migration
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Feature · Severity of issue fixed: Medium Sequence Diagram(s)sequenceDiagram
participant FlowApp
participant FlowTheme
participant FlowTypography
participant LocalFontAssets
FlowApp->>FlowTheme: create theme
FlowTheme->>FlowTypography: use standard typography
FlowTypography->>LocalFontAssets: resolve GoogleSans and GoogleSansCode
LocalFontAssets-->>FlowTypography: provide bundled font cuts
FlowTypography-->>FlowApp: return text styles
Merge Risk: 🔵 Low · up to An incomplete font source download can leave bundled assets only partly rebuilt. Validate both source directories before generating output. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Out of Scope Changes checkExplanation The PR removes
✨ Finishing Touches📝 Generate docstrings
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Inline comments:
In `@packages/flow_ui/tool/subset_fonts.sh`:
- Line 21: Update the initial source validation guard in the subset-fonts script
to require both Google_Sans/static and Google_Sans_Code/static, while preserving
the existing empty-SRC check, so no fonts are written unless both source
directories exist.
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⛔ Files ignored due to path filters (21)
packages/flow_ui/fonts/GoogleSans-Bold.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSans-BoldItalic.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSans-Italic.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSans-Medium.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSans-MediumItalic.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSans-Regular.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSans-SemiBold.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSans-SemiBoldItalic.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSansCode-Bold.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSansCode-BoldItalic.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSansCode-ExtraBold.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSansCode-ExtraBoldItalic.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSansCode-Italic.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSansCode-Light.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSansCode-LightItalic.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSansCode-Medium.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSansCode-MediumItalic.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSansCode-Regular.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSansCode-SemiBold.ttfis excluded by!**/*.ttfpackages/flow_ui/fonts/GoogleSansCode-SemiBoldItalic.ttfis excluded by!**/*.ttfpubspec.lockis excluded by!**/*.lock
📒 Files selected for processing (33)
AGENTS.mdCLAUDE.mddocs/README.mddocs/astro.config.mjsdocs/src/content/docs/components/code-block.mdxdocs/src/content/docs/getting-started.mdxdocs/src/content/docs/theming.mdxpackages/flow_ui/.pubignorepackages/flow_ui/CHANGELOG.mdpackages/flow_ui/README.mdpackages/flow_ui/example/linux/flutter/generated_plugins.cmakepackages/flow_ui/example/windows/flutter/generated_plugins.cmakepackages/flow_ui/fonts/OFL-GoogleSansCode.txtpackages/flow_ui/fonts/OFL.txtpackages/flow_ui/lib/src/theme/flow_theme.dartpackages/flow_ui/lib/src/theme/flow_typography.dartpackages/flow_ui/lib/src/utils/flow_chip_text.dartpackages/flow_ui/lib/src/widgets/flow_attachment_group.dartpackages/flow_ui/lib/src/widgets/flow_confirmation.dartpackages/flow_ui/lib/src/widgets/flow_error_state.dartpackages/flow_ui/lib/src/widgets/flow_markdown.dartpackages/flow_ui/pubspec.yamlpackages/flow_ui/tool/subset_fonts.shpackages/stacflow/example/linux/flutter/generated_plugins.cmakepackages/stacflow/example/windows/flutter/generated_plugins.cmakeplayground/android/app/src/main/AndroidManifest.xmlplayground/lib/src/demos/toast_demo.dartplayground/lib/src/shell_text.dartplayground/linux/flutter/generated_plugins.cmakeplayground/macos/Runner/DebugProfile.entitlementsplayground/macos/Runner/Release.entitlementsplayground/pubspec.yamlplayground/windows/flutter/generated_plugins.cmake
💤 Files with no reviewable changes (10)
- playground/windows/flutter/generated_plugins.cmake
- playground/pubspec.yaml
- playground/macos/Runner/Release.entitlements
- packages/stacflow/example/windows/flutter/generated_plugins.cmake
- playground/macos/Runner/DebugProfile.entitlements
- playground/android/app/src/main/AndroidManifest.xml
- packages/flow_ui/example/linux/flutter/generated_plugins.cmake
- playground/linux/flutter/generated_plugins.cmake
- packages/stacflow/example/linux/flutter/generated_plugins.cmake
- packages/flow_ui/example/windows/flutter/generated_plugins.cmake
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Closes #47.
Google Sans and Google Sans Code now ship in
packages/flow_ui/fonts/under the OFL, declared underflutter: fonts:with every cut and addressed aspackage: 'flow_ui'.google_fontsis dropped fromdependencies:, which leaves one dependency beyond flutter.dev.What that buys: no
android.permission.INTERNET, nocom.apple.security.network.client, no fallback face while a cut is in flight, and no fetch on first launch offline.Size
Google Sans ships as a Latin subset — the upstream static cuts are ~1.95 MB each (7,525 glyphs covering Devanagari, Bengali, Hebrew, Thai, Georgian and more), so the eight cuts unmodified would have added ~16 MB to every host app. Subset, each lands at ~82 KB.
Total compressed archive: 1 MB. Google Sans Code is shipped whole — it is already small, and the coverage a subset would drop (box drawing, arrows, technical symbols) is what a code face is for.
The scripts the subset leaves out fall back to the platform face, the way CJK already does — and the way the pre-0.3 bundled Figtree did.
packages/flow_ui/tool/subset_fonts.shrebuilds the directory from a Google Fonts download and is excluded from the published archive.Licence
Both families are SIL OFL 1.1 and neither reserves a font name, so the subset may keep the name.
pyftsubsetdrops the copyright, trademark and licence name records by default, so the script passes--name-IDs='*'to keep them inside every file.fonts/OFL.txtandfonts/OFL-GoogleSansCode.txtship beside the fonts and are listed underflutter: licenses:, so they reach every host'sshowLicensePage(). "Google Sans" is still a Google trademark, and the README says plainly that the sans ships as a subset.API changes
With one real family per face and every cut declared, the compromises the runtime fetch forced come back out:
FlowTypography.standardandFlowTheme.typographyareconstagain (reverting the 0.3.0 breaking note).FlowTypography.code/codeInlineare plain non-nullable fields with const defaults, replacing the nullable backing fields and their forwarding getters.FlowTypography.recutis deprecated in favour ofcopyWith(fontWeight:, fontStyle:). It existed only to reach google_fonts' per-cut families (GoogleSans_600); the engine now resolves the real cut from the weight on the style. All seven call sites are migrated; removal in 0.6.0.Playground
shell_text.dartdraws on the bundled family,google_fontsleaves its pubspec, and the AndroidINTERNETpermission and macOSnetwork.cliententitlement that commit 9913cfd added for the fetch are removed.network.serverstays in the debug/profile entitlements for the Dart VM service. Both example apps keep their network access — they call Gemini.Verification
melos run analyze(--fatal-infos) clean across all five workspace members;dart formatclean.flutter pub publish --dry-run: all 20 fonts and both OFL texts ship,tool/does not, archive is 1 MB.flutter build web --releaseinplayground/:FontManifest.jsonregisterspackages/flow_ui/GoogleSans(8 cuts) andpackages/flow_ui/GoogleSansCode(12 cuts), and both OFL texts land inassets/NOTICES.usWeightClassand italic bits.Two notes for review
flow_markdown.dartdraws nested list bullets with◦(U+25E6) and▪(U+25AA). Neither is in Google Sans at all — upstream or subset — so those markers have always rendered in the platform fallback face. Worth its own issue.Note
Medium Risk
Touches the public theme/typography surface and every consumer’s app size (~1 MB fonts); migration is mostly docs plus replacing
recut, but pre-1.0 hosts should read the changelog.Overview
Ships Google Sans and Google Sans Code inside
flow_uiinstead of loading them throughgoogle_fonts, which is removed frompubspec.yaml. Fonts live underpackages/flow_ui/fonts/(OFL texts included), are registered influtter: fonts:withpackage: 'flow_ui', and Google Sans is maintained as a Latin subset viatool/subset_fonts.sh(excluded from publish). Host apps no longer needINTERNETor macOSnetwork.clientfor typography, and the first frame uses the real faces instead of a fetch fallback.Theme/typography API:
FlowTypography.standardandFlowTheme.typographyareconstagain;code/codeInlineare non-nullable fields with const defaults.FlowTypography.recutis deprecated (delegates tocopyWith) and in-package call sites usecopyWithfor weight/style. Typography styles now reference bundled families directly instead ofGoogleFonts.*.Workspace cleanup: Playground drops
google_fonts, AndroidINTERNET, and macOSnetwork.clientfor fonts; docs/README/changelog describe bundled fonts. Example/generated plugin lists losejnifrom the removed dependency tree.Reviewed by Cursor Bugbot for commit 4d9473f. Bugbot is set up for automated code reviews on this repo. Configure here.
Summary by CodeRabbit
New Features
copyWith.Bug Fixes
Documentation
API Changes
FlowTypography.recutis deprecated; usecopyWith(fontWeight:, fontStyle:)instead.