Public declaration syntax from harness-tui-kit/src/components/history/cell.rs
Original source SHA-256: 9fbac8239b612ae5633d3b22f70c8e5813785748060588b969bae1ac06ecd7bb
Function bodies and constant values are omitted. This is not the complete implementation.

Source line 26
pub trait HistoryCell: Debug + Send + Sync {
    /// The logical lines displayed in the main chat viewport.
    fn display_lines(&self, width: u16) -> Vec<Line<'static>>;

    /// Number of viewport rows needed to render this cell at `width`.
    /// Defaults to the count of logical lines returned by
    /// [`Self::display_lines`]. Override when the cell wraps content
    /// or contains lines wider than `width`.
    fn desired_height(&self, width: u16) -> u16 ;

    /// Lines for the transcript overlay (e.g. Ctrl+T in Codex).
    /// Defaults to [`Self::display_lines`]; override when the
    /// transcript representation should differ (e.g. `ExecCell` may
    /// show every grouped command in transcript mode but only the
    /// most-recent in viewport mode).
    fn transcript_lines(&self, width: u16) -> Vec<Line<'static>> ;

    /// Coarse "animation tick" for cells whose rendered output depends
    /// on elapsed time (spinners, shimmer effects). Returning `Some`
    /// signals that any cached transcript output should be invalidated
    /// once the tick changes; returning `None` (the default) means the
    /// cell renders identically across frames.
    fn transcript_animation_tick(&self) -> Option<u64> ;

    /// True when this cell continues a stream from the previous cell.
    /// Used by the view to suppress redundant headers / dividers
    /// between consecutive assistant deltas. Defaults to `false`.
    fn is_stream_continuation(&self) -> bool ;
}