Function build_message_lines

cake-cli/src/chat.rs:188–245

(app: &App, width: u16)

}

fn build_message_lines(app: &App, width: u16) -> Vec<Line<'static>> {
    let mut lines: Vec<Line<'static>> = Vec::new();
    let wrap_width = if width > 4 {
        width as usize - 4
    } else {
        width as usize
    };

    for (i, msg) in app.messages.iter().enumerate() {
        if i > 0 {
            lines.push(Line::from(""));
        }

        if msg.role == "system" {
            continue;
        }

        let is_last = i == app.messages.len() - 1;

        if msg.role == "user" {
            let prefix = "you> ";
            let style = Style::default()
                .fg(Color::Cyan)
                .add_modifier(Modifier::BOLD);
            wrap_text(&mut lines, &msg.content, prefix, style, wrap_width);
        } else {
            let visible = strip_think_tags(&msg.content);

            if is_last && app.waiting {
                // Before first token: show inline indicator
                lines.push(Line::from(Span::styled(
                    "  generating...",
                    Style::default()
                        .fg(Color::DarkGray)
                        .add_modifier(Modifier::ITALIC),
                )));
            } else if is_last && app.thinking {
                // Inside <think> block: show thinking label + content in gray
                let think_content = extract_open_think(&msg.content);
                lines.push(Line::from(Span::styled(
                    "  thinking...",
                    Style::default()
                        .fg(Color::Yellow)
                        .add_modifier(Modifier::ITALIC),
                )));
                if !think_content.is_empty() {
                    let style = Style::default().fg(Color::DarkGray);
                    wrap_text(&mut lines, &think_content, "  ", style, wrap_width);
                }
            } else if !visible.is_empty() {
                let style = Style::default().fg(Color::White);
                wrap_text(&mut lines, &visible, "  ", style, wrap_width);
            }
        }
    }

    lines
}