tai/research/tui-framework-design/za-tui-input-bar.md

za-tui widgets/input_bar.py — multiline input behavior

Metadata

Field	Value
Institute	Molodetz Institute — Research & Retrieval Division
Subject	tui-framework-design
Document type	Source Dossier
Tier	1
Source title	za-tui widgets/input_bar.py — input bar widget (Textual Zalo client)
Source URL	https://raw.githubusercontent.com/buihongduc132/za-tui/main/src/za_tui/widgets/input_bar.py
Source publisher / author	buihongduc132 (za-tui project)
Source type	repository
Source date (published)	Unknown — not stated
Date researched	2026-10-11
Researched by	tai (agent), model: Muse Spark, on behalf of retoor
Research method	direct page fetch
Confidence	Medium
Status	Active

Summary

A multiline TextArea-based input bar: Enter sends, Shift+Enter inserts a newline, with a 2000-character cap, a 100-entry send history on up/down, a 3-second typing-notification throttle, and a reply-quote slot. The fullest input-behavior precedent of the three messaging clients.

Key findings

• Enter sends the message; Shift+Enter inserts a newline.
• Messages are capped at 2000 characters; up/down recall from a 100-entry history.
• Typing notifications are throttled to one per 3 seconds; the bar holds a reply-quote slot for quoted replies.

Pros / strengths

• Complete input contract in one place: send/newline split, cap, history, typing signal, reply quoting — all directly adoptable numbers.
• The 2000-char cap and 100-entry history are concrete defaults tai would otherwise have to invent.

Cons / limitations / caveats

• Typing throttle and reply-quote slot assume a chat-server backend; tai's agent-turn context may need different semantics for both.

Relevance to tai

• Supplies the input contract (Enter send, Shift+Enter newline, 2000-char cap, send history) adopted in the messaging-layout conclusion.

Changelog

Date	Change
2026-10-11	Initial dossier created from 2026-10-11 research-pass evidence (body opened via web_fetch by researching agent).