Implementation Notes
This chapter is written for developers working on the library itself. It provides technical background information about internal implementation details, code structure, and platform-specific behavior that are intentionally not part of the public API documentation.
For the stable public backend contract and custom-backend extension points, see Backend.
Use these notes when you want to:
extend or adapt an existing backend
debug platform-specific integration issues
understand where a specific low-level responsibility is implemented
explore the design decisions behind core components
Important
The pages in this chapter describe internal behavior and design decisions intended for contributors and maintainers. If you are using the library in an application, start with the usage guides and API reference instead.
Follow how the Windows console is initialized, how key input is processed, how the screen size is detected, and how termination state is restored.
Explore the POSIX terminal setup, raw key input handling, TTY probing, and the pipe-based signal forwarding mechanism.
Trace how paragraphs are tokenized, wrapped into physical lines, and finally painted into terminal buffers.
Understand how the Unicode width table is generated, queried, and consistently applied during terminal layout.