use std::env;
use ratatui::{
buffer::Buffer,
layout::{Alignment, Constraint, Layout, Rect},
style::Style,
text::{Line, Span, Text},
widgets::{Block, BorderType, Paragraph, Widget, Wrap},
};
use crate::{
app::{App, AppMode, visual_cursor_pos},
command::CommandInfo,
message::Status,
};
impl Widget for &App {
fn render(self, area: Rect, buf: &mut Buffer) {
let t = self.theme;
let input_text_width = area.width.saturating_sub(2) as usize;
let visual_lines = self.total_visual_lines(input_text_width.max(1));
let input_text_height = visual_lines.clamp(2, 7);
let input_height = input_text_height + 2;
let has_popup = matches!(
self.app_mode,
AppMode::CommandSelector { .. } | AppMode::SubMenu { .. }
);
let popup_rows: u16 = if has_popup { 7 } else { 0 };
let chunks = Layout::vertical([
Constraint::Min(5),
Constraint::Length(input_height),
Constraint::Length(popup_rows),
Constraint::Length(3),
])
.split(area);
let content_width = chunks[0].width.saturating_sub(2) as usize;
let visible_height = (chunks[0].height.saturating_sub(2)) as usize;
let msg_heights: Vec<usize> = self
.messages
.iter()
.map(|msg| msg.visual_line_count(content_width, t))
.collect();
let spacer_count = self.messages.len().saturating_sub(1);
let total_visual: usize = msg_heights.iter().sum::<usize>() + spacer_count;
if total_visual > visible_height {
let max_offset = (total_visual - visible_height) as u16;
if self.scroll_offset.get() > max_offset {
self.scroll_offset.set(max_offset);
}
if self.scroll_offset.get() >= max_offset {
self.auto_scroll.set(true);
}
} else {
if self.scroll_offset.get() > 0 {
self.scroll_offset.set(0);
}
self.auto_scroll.set(true);
}
let mut scroll_rem = self.scroll_offset.get() as usize;
let mut msg_idx = 0usize;
let mut line_offset = 0usize;
for (i, &h) in msg_heights.iter().enumerate() {
let entry_height = h + if i < msg_heights.len() - 1 { 1 } else { 0 };
if scroll_rem < entry_height {
msg_idx = i;
if scroll_rem < h {
line_offset = scroll_rem;
} else {
line_offset = 0;
}
break;
}
scroll_rem -= entry_height;
}
let inner_x = chunks[0].x + 1;
let inner_w = content_width as u16;
let mut used_lines = 0usize;
for (i, _) in msg_heights
.iter()
.enumerate()
.take(self.messages.len())
.skip(msg_idx)
{
if used_lines >= visible_height {
break;
}
let h = msg_heights[i];
let available = visible_height - used_lines;
let remaining = h.saturating_sub(line_offset);
let render_lines = remaining.min(available);
if render_lines == 0 {
break;
}
let msg_area = Rect {
x: inner_x,
y: chunks[0].y + 1 + used_lines as u16,
width: inner_w,
height: render_lines as u16,
};
let lines = self.messages[i].to_lines(t);
let mut text = Text::default();
text.extend(lines);
let bg = self.messages[i].message_bg(t);
Paragraph::new(text)
.scroll((line_offset as u16, 0))
.wrap(Wrap { trim: false })
.style(Style::default().bg(bg))
.render(msg_area, buf);
used_lines += render_lines;
line_offset = 0;
if i + 1 < self.messages.len() && used_lines < visible_height {
let spacer_y = chunks[0].y + 1 + used_lines as u16;
let spacer_area = Rect {
x: inner_x,
y: spacer_y,
width: inner_w,
height: 1,
};
let spacer_text = Text::from(Line::from(Span::raw(" ")));
let spacer = Paragraph::new(spacer_text)
.style(Style::default().fg(t.surface_bg).bg(t.surface_bg));
spacer.render(spacer_area, buf);
used_lines += 1;
}
}
let border_block = Block::bordered()
.title("Chat History")
.title_alignment(Alignment::Center)
.border_type(BorderType::Rounded)
.border_style(Style::default().fg(t.border));
border_block.render(chunks[0], buf);
let input_display = self.input.to_string();
let input_text_width = chunks[1].width.saturating_sub(2) as usize;
let (cursor_visual_row, cursor_visual_col) =
visual_cursor_pos(&self.input, self.cursor_pos, input_text_width);
let input_visible_height = chunks[1].height.saturating_sub(2);
let input_scroll = if cursor_visual_row >= input_visible_height {
cursor_visual_row - input_visible_height + 1
} else {
0
};
self.cursor_x.set(chunks[1].x + 1 + cursor_visual_col);
self.cursor_y
.set(chunks[1].y + 1 + cursor_visual_row - input_scroll);
self.input_width.set(chunks[1].width.saturating_sub(2));
let input_title =
if matches!(self.app_mode, AppMode::ModelForm { .. }) && !self.input_title.is_empty() {
self.input_title.clone()
} else {
"Input".to_string()
};
let input_paragraph = Paragraph::new(input_display)
.block(
Block::bordered()
.title(input_title)
.title_alignment(Alignment::Left)
.border_type(BorderType::Double)
.border_style(Style::default().fg(t.input_border)),
)
.wrap(Wrap { trim: false })
.scroll((input_scroll, 0))
.style(Style::default().fg(t.surface_fg).bg(t.surface_bg));
input_paragraph.render(chunks[1], buf);
const SPINNER: &[&str] = &["⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"];
let spinner_char = match self.agent_status.get() {
Status::Running => {
let idx = (self.tick_counter.get() as usize / 2) % SPINNER.len();
SPINNER[idx]
}
Status::Pause => "•",
};
let mut status_text = format!(
" <Current Agent> {} (Cycle with shift+tab)\n Messages: {} | ↑/↓/←/→ move cursor | Enter send | Ctrl+O expand | Ctrl+C/Esc/q quit",
spinner_char,
self.messages.len()
);
if let Some(main_agent) = &self.main_agent {
status_text =
status_text.replace("<Current Agent>", &format!("<{}>", &main_agent.name));
}
let status_paragraph = Paragraph::new(status_text)
.alignment(Alignment::Left)
.style(Style::default().fg(t.status_fg).bg(t.status_bg));
status_paragraph.render(chunks[3], buf);
let mut status_right = "Use the /model command to set up one model
Unknown directory "
.to_string();
if let Some(config) = &self.global_toml_config {
if let Some(model_name) = &config.model {
status_right = status_right.replace(
"Use the /model command to set up one model ",
&format!("{} ", model_name),
);
}
if let Ok(path) = env::current_dir() {
status_right = status_right.replace(
"Unknown directory ",
&format!("{} ", &path.to_string_lossy()),
);
}
}
let status_right_para = Paragraph::new(status_right)
.alignment(Alignment::Right)
.style(Style::default().fg(t.status_fg).bg(t.status_bg));
status_right_para.render(chunks[3], buf);
if let AppMode::SubMenu {
title: _,
items,
selected,
} = &self.app_mode
&& !items.is_empty()
{
let sel = *selected;
let mut popup_text = Text::default();
for (i, (name, desc)) in items.iter().enumerate() {
let style = if i == sel {
Style::default().fg(t.surface_bg).bg(t.accent)
} else {
Style::default().fg(t.surface_fg)
};
popup_text.push_line(Line::from(vec![
Span::styled(if i == sel { "\u{25b8} " } else { " " }, style),
Span::styled(format!("{} - {}", name, desc), style),
]));
}
let popup = Paragraph::new(popup_text)
.block(
Block::bordered()
.title("Settings")
.title_alignment(Alignment::Left)
.border_type(BorderType::Rounded)
.border_style(Style::default().fg(t.accent)),
)
.style(Style::default().bg(t.surface_bg));
popup.render(chunks[2], buf);
}
if let AppMode::CommandSelector {
selected,
scroll_offset,
} = &self.app_mode
{
let matches = self.command_registry.search(&self.input);
if !matches.is_empty() {
let sel = *selected;
let scroll = *scroll_offset;
let total = matches.len();
let max_rows = 5usize;
let visible: Vec<&&CommandInfo> =
matches.iter().skip(scroll).take(max_rows).collect();
let has_more_down = scroll + max_rows < total;
let has_more_up = scroll > 0;
let popup_area = Rect {
x: chunks[2].x + 1,
y: chunks[2].y + 1,
width: chunks[2].width.saturating_sub(2),
height: chunks[2].height.saturating_sub(2),
};
let mut popup_text = Text::default();
if has_more_up {
popup_text.push_line(Line::from(Span::styled(
" \u{2191} more...",
Style::default().fg(t.subtle),
)));
}
for (i, cmd) in visible.iter().enumerate() {
let abs_idx = scroll + i;
let style = if abs_idx == sel {
Style::default().fg(t.surface_bg).bg(t.accent)
} else {
Style::default().fg(t.surface_fg)
};
popup_text.push_line(Line::from(vec![
Span::styled(if abs_idx == sel { "\u{25b8} " } else { " " }, style),
Span::styled(format!("{} - {}", cmd.name, cmd.description), style),
]));
}
if has_more_down {
popup_text.push_line(Line::from(Span::styled(
" \u{2193} more...",
Style::default().fg(t.subtle),
)));
}
let popup = Paragraph::new(popup_text)
.block(
Block::bordered()
.border_type(BorderType::Rounded)
.border_style(Style::default().fg(t.accent)),
)
.style(Style::default().bg(t.surface_bg));
popup.render(popup_area, buf);
}
}
}
}