use ratatui::{
buffer::Buffer,
layout::Rect,
style::{Modifier, Style},
text::{Line, Span},
widgets::{Paragraph, Widget, Wrap},
};
use ratatui::layout::Alignment;
use crate::state::ConversationState;
use crate::theme;
use super::markdown::render_md_line;
pub struct MessageList<'a> {
pub state: &'a mut ConversationState,
pub spinner_frame: usize,
pub tool_details: bool,
}
impl<'a> MessageList<'a> {
pub fn new(state: &'a mut ConversationState, spinner_frame: usize) -> Self {
Self { state, spinner_frame, tool_details: true }
}
pub fn with_tool_details(mut self, on: bool) -> Self {
self.tool_details = on;
self
}
}
impl<'a> Widget for MessageList<'a> {
fn render(self, area: Rect, buf: &mut Buffer) {
let pad = 1u16;
let area = Rect {
x: area.x + pad,
width: area.width.saturating_sub(pad * 2),
y: area.y + 1,
height: area.height.saturating_sub(1),
};
if self.state.messages.is_empty() {
draw_empty_state(area, buf);
return;
}
let mut lines: Vec<Line<'static>> = Vec::new();
let bar = "▌";
let body_indent = " ";
for msg in &self.state.messages {
match msg.role.as_str() {
"user" => {
lines.push(Line::from(vec![
Span::styled(bar, Style::default().fg(theme::FOAM()).add_modifier(Modifier::BOLD)),
Span::styled(" You", Style::default().fg(theme::FOAM()).add_modifier(Modifier::BOLD)),
]));
for raw in msg.content.lines() {
lines.push(Line::from(Span::styled(
format!("{body_indent}{}", raw.trim_end()),
Style::default().fg(theme::TEXT()),
)));
}
}
"error" => {
lines.push(Line::from(vec![
Span::styled(bar, Style::default().fg(theme::LOVE()).add_modifier(Modifier::BOLD)),
Span::styled(" Error", Style::default().fg(theme::LOVE()).add_modifier(Modifier::BOLD)),
]));
for raw in msg.content.lines() {
lines.push(Line::from(Span::styled(
format!("{body_indent}{}", raw.trim_end()),
Style::default().fg(theme::LOVE()),
)));
}
}
"system" => {
for raw in msg.content.lines() {
lines.push(Line::from(vec![
Span::styled(bar, Style::default().fg(theme::SUBTLE())),
Span::styled(
format!(" {}", raw.trim_end()),
Style::default().fg(theme::MUTED()).add_modifier(Modifier::ITALIC),
),
]));
}
}
"done" => {
let parts: Vec<&str> = msg.content.split(", ").collect();
for (i, part) in parts.iter().enumerate() {
let prefix = if i == 0 { " ✓ " } else { " " };
let prefix_style = if i == 0 {
Style::default().fg(theme::SUCCESS()).add_modifier(Modifier::BOLD)
} else {
Style::default()
};
lines.push(Line::from(vec![
Span::styled(prefix, prefix_style),
Span::styled(
part.to_string(),
Style::default().fg(theme::MUTED()).add_modifier(Modifier::ITALIC),
),
]));
}
}
_ => {
lines.push(Line::from(vec![
Span::styled(bar, Style::default().fg(theme::IRIS()).add_modifier(Modifier::BOLD)),
Span::styled(" Stynx", Style::default().fg(theme::IRIS()).add_modifier(Modifier::BOLD)),
]));
if !msg.thinking.is_empty() && !msg.is_streaming {
let lc = msg.thinking.lines().count();
lines.push(Line::from(Span::styled(
format!(" ◈ thinking · {lc} lines"),
Style::default()
.fg(theme::MUTED())
.add_modifier(Modifier::ITALIC | Modifier::DIM),
)));
lines.push(Line::from(""));
}
let mut in_code = false;
let mut in_mermaid = false;
let mut prev_blank = false;
for raw in msg.content.lines() {
let trimmed_start = raw.trim_start();
let is_blank = raw.trim().is_empty();
if is_blank {
if !prev_blank { lines.push(Line::from("")); }
prev_blank = true;
continue;
}
prev_blank = false;
if trimmed_start.starts_with("```mermaid") {
in_mermaid = true; in_code = true;
lines.push(Line::from(Span::styled(" ╭─ mermaid ", Style::default().fg(theme::IRIS()).add_modifier(Modifier::BOLD))));
} else if in_mermaid && trimmed_start.starts_with("```") {
in_mermaid = false; in_code = false;
lines.push(Line::from(Span::styled(" ╰────────── ", Style::default().fg(theme::IRIS()))));
} else if in_mermaid {
lines.push(Line::from(vec![
Span::styled(" │ ", Style::default().fg(theme::IRIS())),
Span::styled(raw.trim_end().to_string(), Style::default().fg(theme::GOLD())),
]));
} else if trimmed_start.starts_with("```") {
if in_code {
in_code = false;
lines.push(Line::from(Span::styled(" ╰──", Style::default().fg(theme::OVERLAY()))));
} else {
in_code = true;
let lang = trimmed_start.trim_start_matches('`').trim();
let label = if lang.is_empty() { " ╭─ code".to_string() } else { format!(" ╭─ {lang}") };
lines.push(Line::from(Span::styled(label, Style::default().fg(theme::OVERLAY()).add_modifier(Modifier::DIM))));
}
} else {
lines.push(render_md_line(raw, in_code));
}
}
let _ = in_code;
}
}
lines.push(Line::from(""));
}
lines.push(Line::from(""));
lines.push(Line::from(""));
let width = area.width as usize;
let total_rows: usize = lines
.iter()
.map(|l| {
let w = l.width();
if w == 0 || width == 0 { 1 } else { (w + width - 1) / width }
})
.sum();
let visible = area.height as usize;
self.state.total_lines = total_rows;
let max_offset = total_rows.saturating_sub(visible);
let offset = if self.state.auto_scroll {
self.state.scroll_offset = max_offset;
max_offset
} else {
let o = self.state.scroll_offset.min(max_offset);
self.state.scroll_offset = o;
o
};
Paragraph::new(lines).scroll((offset as u16, 0)).wrap(Wrap { trim: false }).render(area, buf);
}
}
const LOGO_ART: &[&str] = &[
r" ____ _____ __ __ _ _ __ __",
r"/ ___| |_ _|\ \ / /| \ | |\ \/ /",
r"\___ \ | | \ V / | \| | \ / ",
r" ___) | | | | | | |\ | / \ ",
r"|____/ |_| |_| |_| \_|/_/\_\",
];
const LOGO_SUBTITLE: &str = "c o d e";
const HINTS: &[(&str, &str)] = &[
("^P", "command palette"),
("^T", "focus tools"),
("^M", "switch model"),
("/help", "show help"),
];
fn draw_empty_state(area: Rect, buf: &mut Buffer) {
let mut lines: Vec<Line<'static>> = Vec::new();
let logo_w = LOGO_ART.iter().map(|s| s.chars().count()).max().unwrap_or(0);
let pad_to = |s: &str, w: usize| -> String {
let n = s.chars().count();
if n >= w { s.to_string() } else {
let extra = w - n;
let left = extra / 2;
let right = extra - left;
format!("{}{}{}", " ".repeat(left), s, " ".repeat(right))
}
};
let top_pad = area.height.saturating_sub(16) / 3;
for _ in 0..top_pad { lines.push(Line::from("")); }
for art in LOGO_ART {
lines.push(Line::from(Span::styled(
pad_to(art, logo_w),
Style::default().fg(theme::PRIMARY()).add_modifier(Modifier::BOLD),
)));
}
lines.push(Line::from(Span::styled(
pad_to(LOGO_SUBTITLE, logo_w),
Style::default().fg(theme::ACCENT()),
)));
lines.push(Line::from(""));
lines.push(Line::from(Span::styled(
format!("v{}", env!("CARGO_PKG_VERSION")),
Style::default().fg(theme::TEXT_MUTED()),
)));
lines.push(Line::from(""));
lines.push(Line::from(Span::styled(
"────────────────────".to_string(),
Style::default().fg(theme::BORDER()),
)));
lines.push(Line::from(""));
let key_w = HINTS.iter().map(|(k, _)| k.chars().count()).max().unwrap_or(0);
let label_w = HINTS.iter().map(|(_, l)| l.chars().count()).max().unwrap_or(0);
for (k, l) in HINTS {
let key = format!("{:>width$}", k, width = key_w);
let label = format!("{:<width$}", l, width = label_w);
lines.push(Line::from(vec![
Span::styled(key, Style::default().fg(theme::ACCENT()).add_modifier(Modifier::BOLD)),
Span::raw(" "),
Span::styled(label, Style::default().fg(theme::TEXT_MUTED())),
]));
}
lines.push(Line::from(""));
lines.push(Line::from(Span::styled(
"type a message to begin…".to_string(),
Style::default().fg(theme::TEXT_MUTED()).add_modifier(Modifier::ITALIC),
)));
Paragraph::new(lines).alignment(Alignment::Center).render(area, buf);
}