mirror of
https://github.com/heygen-com/hyperframes.git
synced 2026-09-03 04:38:33 +00:00
Miguel Ángel
cb73c8dc2e
* feat(studio): apply a style to a run of characters Styling text in a composition cannot be done by wrapping a DOM range in a span. That is three lines, and then every interesting case is a special case: recolouring nests spans that shadow each other, removing a style cannot reach the ancestor that set it, and styling across an existing run's boundary has to split it. Each fix is a new branch and the branches interact. So the element is read into a flat list of styled runs, the style is applied to a span of characters in that list, and the element is rebuilt from it. Replacing, removing, splitting and merging stop being cases: the rebuild emits one span per distinct run and cannot nest or duplicate, whatever was there before. Selection offsets count UTF-16 units, so a boundary can land between the halves of an emoji; the applied range widens to whole characters. A colour an ancestor overpaints is mirrored into the fill, because a colour that does not paint reads to the user as a colour that did not save. The toolbar that drives this arrives with the editor in the next change. * fix(studio): harden inline text styling boundaries * fix(studio): align inline styling with persistence * test(studio): pin inline identity delimiters
@hyperframes/studio
Browser-based composition editor UI for Hyperframes. Provides a visual timeline, code editor, and live preview for building video compositions.
Install
npm install @hyperframes/studio
What it does
The studio is a React application with:
- Visual timeline — drag, resize, and arrange elements on tracks
- Code editor — edit HTML and GSAP scripts with CodeMirror (syntax highlighting, autocomplete)
- Live preview — see changes in real time as you edit
- Composition inspector — view and modify element properties
Development
The studio is embedded in the hyperframes preview command. To develop the studio UI itself:
cd packages/studio
bun run dev # Start Vite dev server
bun run build # Build for production
bun run typecheck # Type-check
Tech stack
- React 18/19, Zustand (state management)
- CodeMirror 6 (editor)
- Tailwind CSS (styling)
- Vite (bundler)
- Phosphor Icons
Documentation
Full documentation: hyperframes.heygen.com/packages/studio
Related packages
@hyperframes/core— types and parsers used by the editorhyperframes— CLI that serves the studio viahyperframes preview