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42 lines
2.2 KiB
Markdown
42 lines
2.2 KiB
Markdown
+++
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id = "30"
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title = "Non-Fullscreen Scrollback Mode with Native Terminal Scroll"
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status = "Not started"
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dependencies = "" # No prerequisites
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last_updated = "2025-06-25T01:40:09.600000"
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## Summary
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Offer a non-fullscreen TUI mode that appends conversation output and defers scrolling to the terminal scrollback.
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## Goal
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Provide an optional non-fullscreen mode for the chat UI where:
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- The TUI does not capture the mouse scroll wheel.
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- All conversation output is appended in place, allowing the terminal's native scrollback to navigate history.
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- The user-entry window remains fixed at the bottom of the terminal.
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- The entire UI runs in a standard terminal buffer (no alternate screen), so the user can use their terminal’s scrollbar or scrollback keys to review past messages.
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## Acceptance Criteria
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- Introduce a `tui.non_fullscreen_mode` config flag (default `false`).
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- When enabled, the application:
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- Disables alternate screen buffering (i.e. does not switch to the TUI alt-screen).
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- Does not intercept mouse scroll events; scroll events are passed through to the terminal.
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- Renders new chat messages inline (appended) rather than redrawing the full viewport.
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- Keeps the user input prompt visible at the bottom after each message.
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- Add integration tests or manual validation steps to confirm that: scrollback keys/mouse scroll work via terminal scrollback, and the prompt remains in view.
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## Implementation
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**How it was implemented**
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- Add `non_fullscreen_mode: bool` to the `tui` config section.
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- In the TUI initialization, skip entering the alternate screen and disable pannable viewports.
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- Remove mouse event capture for scroll wheel events when `non_fullscreen_mode` is true.
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- Change rendering loop: after each new message, print the message directly to the stdout buffer (in append mode), then redraw only the input prompt line.
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- Write integration tests that spawn the TUI in non-fullscreen mode, emit multiple messages, send scroll events (if possible), and assert that scrollback buffer contains the messages.
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## Notes
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- This mode trades advanced in-TUI scrolling features for simplicity and compatibility with users’ accustomed terminal scrollback.
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- It may not support complex viewport resizing; documentation should note that.
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