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Architecture

ByeText is structured as a stateful text engine:

  • document.ts owns runs, dirty ranges, caches, and active plugins.
  • measure.ts wraps canvas measurement with a two-level cache and deterministic keys.
  • break.ts tokenizes measured runs into segment widths and computes line boundaries with prefix sums and binary search.
  • layout.ts performs full or incremental relayout and rebuilds lookup indices.
  • render.ts redraws only dirty regions on a single 2D canvas.
  • plugin.ts exposes structural extension points instead of method monkey-patching.

The core package stays dependency-free and tree-shakeable. Optional behavior lives in plugin packages.