Struct messageModel

pkg/tui/components/message/message.go:43–80

messageModel implements Model

// messageModel implements Model
type messageModel struct {
	message  *types.Message
	previous *types.Message

	width    int
	height   int
	focused  bool
	selected bool
	hovered  bool
	expanded bool
	spinner  spinner.Spinner

	// renderCache memoizes the output of Render(width) keyed by the inputs
	// that affect its output. During streaming, View() and Height() are called
	// in pairs for each new chunk, and the chat list also re-renders for hover
	// tracking and scroll updates; without this cache each call would re-parse
	// the entire accumulated markdown from scratch.
	renderCache renderCache

	// codeBlocks holds the fenced code blocks emitted by the last call to
	// render() for assistant messages, with Line indices translated into the
	// messageModel's own View() output coordinate system (i.e. zero-indexed
	// from the first line of View()).
	codeBlocks []markdown.CodeBlock

	// mdRenderer is reused across renders of an assistant message so that
	// streamed-in chunks only re-render the trailing block instead of the whole
	// accumulated markdown each time.
	mdRenderer *markdown.IncrementalRenderer

	// finalized is set by Finalize() once the message is no longer the active
	// streaming view. After it is set, Render() still produces correct output,
	// but does not store anything in renderCache and does not retain an
	// IncrementalRenderer between calls — both are pure caches whose memory
	// dominates a long session, and they are not worth keeping for messages
	// that are unlikely to be re-rendered hot.
	finalized bool
}

// renderCache stores the most recent Render result keyed by the inputs that
// can change its output. The key is small enough (a string and a few flags)