Add pipeview-tui with ANSI escape sequence rendering

Full ratatui terminal application mirroring pipeview-gui:
- Single-session telemetry console with Text/Hex/Plot views
- Serial/TCP/UDP transport with full parameter config
- DTR/RTS control, auto-reconnect, data send (Text/Hex modes)
- Search with case-sensitive toggle and match navigation
- Interactive config form with inline editing
- ANSI SGR parsing via ansitok: 4-bit, 256-color, true color,
  bold/italic/underline/strikethrough rendering in text view
- Persistent session state via JSON
- Mouse clickable controls and mousewheel scroll/zoom

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Cargo.lock

@@ -3325,6 +3325,7 @@ dependencies = [
 name = "pipeview-tui"
 version = "0.1.0"
 dependencies = [
+ "ansitok",
  "clap",
  "crossterm 0.28.1",
  "hex",

crates/pipeview-tui/Cargo.toml

@@ -22,3 +22,4 @@ image = { workspace = true }
 mlua = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
+ansitok = "0.3"

crates/pipeview-tui/src/ansi.rs

@@ -0,0 +1,295 @@
+use ansitok::{AnsiColor, ElementKind, VisualAttribute, parse_ansi, parse_ansi_sgr};
+use ratatui::style::{Color, Modifier, Style};
+use ratatui::text::Span;
+
+/// Parse ANSI-encoded text and return a Vec of styled Spans.
+///
+/// ANSI SGR sequences (colors, bold, italic, underline, strikethrough)
+/// are converted to ratatui `Style` applied on top of `base_style`.
+/// Non-SGR sequences (cursor movement, etc.) are silently ignored.
+pub fn ansi_to_spans(text: &str, base_style: Style) -> Vec<Span<'static>> {
+    let mut spans = Vec::new();
+    let mut style = AnsiStyleStack::default();
+
+    for element in parse_ansi(text) {
+        match element.kind() {
+            ElementKind::Text => {
+                let slice = &text[element.start()..element.end()];
+                if !slice.is_empty() {
+                    spans.push(Span::styled(
+                        slice.to_string(),
+                        style.merge(base_style),
+                    ));
+                }
+            }
+            ElementKind::Sgr => {
+                let sgr = &text[element.start()..element.end()];
+                apply_sgr_sequence(&mut style, sgr);
+            }
+            _ => {}
+        }
+    }
+
+    spans
+}
+
+/// Extract visible text from ANSI-encoded string (strips escape sequences).
+///
+/// This is the text that a user would actually see on a terminal —
+/// useful for search, copy, and line counting.
+pub fn ansi_visible_text(text: &str) -> String {
+    let mut visible = String::new();
+    for element in parse_ansi(text) {
+        if element.kind() == ElementKind::Text {
+            visible.push_str(&text[element.start()..element.end()]);
+        }
+    }
+    visible
+}
+
+// ── internal style stack ──
+
+#[derive(Default, Clone)]
+struct AnsiStyleStack {
+    fg: Option<Color>,
+    bg: Option<Color>,
+    bold: bool,
+    italic: bool,
+    underline: bool,
+    strikethrough: bool,
+}
+
+impl AnsiStyleStack {
+    fn apply_sgr_attr(&mut self, attr: VisualAttribute) {
+        match attr {
+            VisualAttribute::Reset(0) => *self = Self::default(),
+            VisualAttribute::Reset(22) => self.bold = false,
+            VisualAttribute::Reset(23) => self.italic = false,
+            VisualAttribute::Reset(24) => self.underline = false,
+            VisualAttribute::Reset(29) => self.strikethrough = false,
+            VisualAttribute::Reset(39) => self.fg = None,
+            VisualAttribute::Reset(49) => self.bg = None,
+            VisualAttribute::Reset(_) => {}
+            VisualAttribute::Bold => self.bold = true,
+            VisualAttribute::Faint => self.bold = false,
+            VisualAttribute::Italic => self.italic = true,
+            VisualAttribute::Underline => self.underline = true,
+            VisualAttribute::Crossedout => self.strikethrough = true,
+            VisualAttribute::FgColor(c) => self.fg = Some(ansi_color_to_ratatui(c)),
+            VisualAttribute::BgColor(c) => self.bg = Some(ansi_color_to_ratatui(c)),
+            _ => {}
+        }
+    }
+
+    fn apply_sgr(&mut self, sgr: &str) {
+        // Strip ESC[ ... m wrapper and delegate to ansitok's SGR parser
+        let params = sgr
+            .strip_prefix("\x1b[")
+            .and_then(|s| s.strip_suffix('m'))
+            .unwrap_or(sgr);
+
+        if params.is_empty() {
+            *self = Self::default();
+            return;
+        }
+
+        for output in parse_ansi_sgr(sgr) {
+            if let Some(attr) = output.as_escape() {
+                self.apply_sgr_attr(attr);
+            }
+        }
+    }
+
+    fn merge(&self, base: Style) -> Style {
+        let mut style = base;
+
+        if let Some(fg) = self.fg {
+            if self.bold {
+                style = style.fg(brighten(fg));
+            } else {
+                style = style.fg(fg);
+            }
+        }
+        if let Some(bg) = self.bg {
+            style = style.bg(bg);
+        }
+        if self.italic {
+            style = style.add_modifier(Modifier::ITALIC);
+        }
+        if self.underline {
+            style = style.add_modifier(Modifier::UNDERLINED);
+        }
+        if self.strikethrough {
+            style = style.add_modifier(Modifier::CROSSED_OUT);
+        }
+        if self.bold {
+            // Bold applied only when there's no explicit fg (brighten handles it otherwise)
+            style = style.add_modifier(Modifier::BOLD);
+        }
+
+        style
+    }
+}
+
+fn apply_sgr_sequence(style: &mut AnsiStyleStack, sgr: &str) {
+    style.apply_sgr(sgr);
+}
+
+// ── color conversion ──
+
+fn ansi_color_to_ratatui(color: AnsiColor) -> Color {
+    match color {
+        AnsiColor::Bit4(c) => ansi_4bit(c),
+        AnsiColor::Bit8(c) => ansi_256(c),
+        AnsiColor::Bit24 { r, g, b } => Color::Rgb(r, g, b),
+    }
+}
+
+fn ansi_4bit(code: u8) -> Color {
+    match code {
+        30 => Color::Rgb(0, 0, 0),
+        31 => Color::Rgb(194, 54, 33),
+        32 => Color::Rgb(37, 188, 36),
+        33 => Color::Rgb(173, 173, 39),
+        34 => Color::Rgb(73, 46, 225),
+        35 => Color::Rgb(211, 56, 211),
+        36 => Color::Rgb(51, 187, 200),
+        37 => Color::Rgb(203, 204, 205),
+
+        90 => Color::Rgb(129, 131, 131),
+        91 => Color::Rgb(252, 57, 31),
+        92 => Color::Rgb(49, 231, 34),
+        93 => Color::Rgb(234, 236, 35),
+        94 => Color::Rgb(88, 51, 255),
+        95 => Color::Rgb(249, 53, 248),
+        96 => Color::Rgb(20, 240, 240),
+        97 => Color::Rgb(233, 235, 235),
+
+        // Background colors (same values as foreground but offset by 10)
+        40 => Color::Rgb(0, 0, 0),
+        41 => Color::Rgb(194, 54, 33),
+        42 => Color::Rgb(37, 188, 36),
+        43 => Color::Rgb(173, 173, 39),
+        44 => Color::Rgb(73, 46, 225),
+        45 => Color::Rgb(211, 56, 211),
+        46 => Color::Rgb(51, 187, 200),
+        47 => Color::Rgb(203, 204, 205),
+
+        100 => Color::Rgb(129, 131, 131),
+        101 => Color::Rgb(252, 57, 31),
+        102 => Color::Rgb(49, 231, 34),
+        103 => Color::Rgb(234, 236, 35),
+        104 => Color::Rgb(88, 51, 255),
+        105 => Color::Rgb(249, 53, 248),
+        106 => Color::Rgb(20, 240, 240),
+        107 => Color::Rgb(233, 235, 235),
+
+        _ => Color::Rgb(255, 255, 255),
+    }
+}
+
+fn ansi_256(code: u8) -> Color {
+    match code {
+        0..=15 => ansi_4bit(if code < 8 { code + 30 } else { code + 82 }),
+        16..=231 => {
+            let idx = code - 16;
+            let cube = [0, 95, 135, 175, 215, 255];
+            let r = cube[(idx / 36) as usize];
+            let g = cube[((idx / 6) % 6) as usize];
+            let b = cube[(idx % 6) as usize];
+            Color::Rgb(r, g, b)
+        }
+        232..=255 => {
+            let v = (code - 232) * 10 + 8;
+            Color::Rgb(v, v, v)
+        }
+    }
+}
+
+fn brighten(color: Color) -> Color {
+    match color {
+        Color::Rgb(r, g, b) => Color::Rgb(
+            ((r as u32) * 13 / 10).min(255) as u8,
+            ((g as u32) * 13 / 10).min(255) as u8,
+            ((b as u32) * 13 / 10).min(255) as u8,
+        ),
+        _ => color,
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use ratatui::style::Style;
+
+    fn visible<'a>(spans: &[Span<'a>]) -> String {
+        spans.iter().map(|s| s.content.as_ref()).collect::<String>()
+    }
+
+    #[test]
+    fn plain_text_no_ansi() {
+        let spans = ansi_to_spans("hello", Style::default());
+        assert_eq!(spans.len(), 1);
+        assert_eq!(spans[0].content, "hello");
+    }
+
+    #[test]
+    fn fg_red_reset() {
+        let spans = ansi_to_spans("\x1b[31mred\x1b[0m plain", Style::default());
+        assert!(spans.len() >= 2);
+        assert_eq!(visible(&spans), "red plain");
+    }
+
+    #[test]
+    fn empty_sgr_resets_all() {
+        let base = Style::default().fg(Color::Rgb(1, 2, 3));
+        let spans = ansi_to_spans("\x1b[31mred\x1b[m plain", base);
+        assert_eq!(visible(&spans), "red plain");
+        assert!(spans.len() >= 2);
+        // First span should have red foreground
+        assert_ne!(spans[0].style.fg, Some(Color::Rgb(1, 2, 3)));
+        // Last span should have base foreground
+        assert_eq!(spans.last().unwrap().style.fg, Some(Color::Rgb(1, 2, 3)));
+    }
+
+    #[test]
+    fn bold_brightens_color() {
+        let spans = ansi_to_spans("\x1b[1;31mbold red\x1b[0m", Style::default());
+        assert_eq!(spans.len(), 1);
+        assert_eq!(visible(&spans), "bold red");
+    }
+
+    #[test]
+    fn strip_ansi_codes_from_output() {
+        let spans = ansi_to_spans("\x1b[32mgreen\x1b[0m", Style::default());
+        assert_eq!(visible(&spans), "green");
+    }
+
+    #[test]
+    fn visible_text_strips_ansi() {
+        assert_eq!(ansi_visible_text("plain"), "plain");
+        assert_eq!(ansi_visible_text("\x1b[31mred\x1b[0m"), "red");
+        assert_eq!(
+            ansi_visible_text("\x1b[1;32mbold green\x1b[0m plain"),
+            "bold green plain"
+        );
+    }
+
+    #[test]
+    fn xterm_256_color_cube() {
+        assert_eq!(ansi_256(16), Color::Rgb(0, 0, 0));
+        assert_eq!(ansi_256(21), Color::Rgb(0, 0, 255));
+        assert_eq!(ansi_256(52), Color::Rgb(95, 0, 0));
+        assert_eq!(ansi_256(67), Color::Rgb(95, 135, 175));
+    }
+
+    #[test]
+    fn true_color_24bit() {
+        let spans = ansi_to_spans(
+            "\x1b[38;2;100;200;50mtruecolor\x1b[0m",
+            Style::default(),
+        );
+        assert_eq!(visible(&spans), "truecolor");
+        assert_eq!(spans[0].style.fg, Some(Color::Rgb(100, 200, 50)));
+    }
+}

crates/pipeview-tui/src/app_state.rs

@@ -3,18 +3,20 @@ use std::fs;
 use std::io;
 use std::path::{Path, PathBuf};
 
+use pipeview_client::SessionConfig;
 use serde::{Deserialize, Serialize};
 use tracing::warn;
-use pipeview_client::SessionConfig;
+
+use crate::app::{DisplayOptions, View, default_session_config};
 
 const TUI_STATE_FILE_NAME: &str = "tui-state.json";
 
-#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct PersistedTuiState {
+    #[serde(default = "default_session")]
+    pub session: SessionConfig,
     #[serde(default)]
-    pub sessions: Vec<SessionConfig>,
+    pub active_view: PersistedView,
-    #[serde(default)]
-    pub active: usize,
     #[serde(default = "default_true")]
     pub show_timestamp: bool,
     #[serde(default = "default_true")]
@@ -23,9 +25,54 @@ pub struct PersistedTuiState {
     pub show_pipeline: bool,
 }
 
+impl Default for PersistedTuiState {
+    fn default() -> Self {
+        Self {
+            session: default_session(),
+            active_view: PersistedView::Text,
+            show_timestamp: true,
+            show_direction: true,
+            show_pipeline: true,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize, Default)]
+pub enum PersistedView {
+    #[default]
+    Text,
+    Hex,
+    Plot,
+}
+
+impl From<View> for PersistedView {
+    fn from(value: View) -> Self {
+        match value {
+            View::Text => Self::Text,
+            View::Hex => Self::Hex,
+            View::Plot => Self::Plot,
+        }
+    }
+}
+
+impl From<PersistedView> for View {
+    fn from(value: PersistedView) -> Self {
+        match value {
+            PersistedView::Text => View::Text,
+            PersistedView::Hex => View::Hex,
+            PersistedView::Plot => View::Plot,
+        }
+    }
+}
+
 pub fn load_tui_state() -> PersistedTuiState {
     match load_tui_state_from_path(&tui_state_path()) {
-        Ok(state) => state,
+        Ok(mut state) => {
+            if state.session.pipelines.is_empty() {
+                state.session = default_session();
+            }
+            state
+        }
         Err(err) if err.kind() == io::ErrorKind::NotFound => PersistedTuiState::default(),
         Err(err) => {
             warn!(error = %err, "Failed to load persisted TUI state");
@@ -34,16 +81,35 @@ pub fn load_tui_state() -> PersistedTuiState {
     }
 }
 
-pub fn save_tui_state(state: &PersistedTuiState) {
+pub fn save_tui_state(session: &SessionConfig, view: View, display: DisplayOptions) {
-    if let Err(err) = save_tui_state_to_path(state, &tui_state_path()) {
+    let state = PersistedTuiState {
+        session: session.clone(),
+        active_view: view.into(),
+        show_timestamp: display.show_timestamp,
+        show_direction: display.show_direction,
+        show_pipeline: display.show_pipeline,
+    };
+
+    if let Err(err) = save_tui_state_to_path(&state, &tui_state_path()) {
         warn!(error = %err, "Failed to persist TUI state");
     }
 }
 
+fn default_session() -> SessionConfig {
+    default_session_config()
+}
+
 fn tui_state_path() -> PathBuf {
     state_path_for_os_and_env(env::consts::OS, |key| env::var(key).ok())
 }
 
+pub fn config_dir() -> PathBuf {
+    tui_state_path()
+        .parent()
+        .map(Path::to_path_buf)
+        .unwrap_or_else(|| PathBuf::from("."))
+}
+
 fn state_path_for_os_and_env(os: &str, get_env: impl Fn(&str) -> Option<String>) -> PathBuf {
     match os {
         "windows" => {

crates/pipeview-tui/src/buffers.rs

@@ -1,7 +1,9 @@
+use std::collections::VecDeque;
 use std::time::{Duration, Instant};
 
 use pipeview_client::{DecodedEntry, RingBuffer};
 use pipeview_core::protocol::DecodedData;
+use pipeview_core::protocol::plot::{PlotFormat, PlotFrame};
 
 #[derive(Clone, Copy, PartialEq, Eq)]
 pub enum LineDirection {
@@ -50,6 +52,10 @@ impl TextBuffer {
         });
     }
 
+    pub fn get(&self, index: usize) -> Option<&ConsoleLine> {
+        self.lines.get(index)
+    }
+
     pub fn len(&self) -> usize {
         self.lines.len()
     }
@@ -61,10 +67,6 @@ impl TextBuffer {
     pub fn set_limit(&mut self, limit: usize) {
         self.lines.set_limit(limit);
     }
-
-    pub fn recent(&self, count: usize) -> Vec<ConsoleLine> {
-        self.lines.drain_recent(count)
-    }
 }
 
 #[derive(Clone)]
@@ -111,6 +113,10 @@ impl HexBuffer {
         });
     }
 
+    pub fn get(&self, index: usize) -> Option<&HexLine> {
+        self.lines.get(index)
+    }
+
     pub fn len(&self) -> usize {
         self.lines.len()
     }
@@ -122,9 +128,494 @@ impl HexBuffer {
     pub fn set_limit(&mut self, limit: usize) {
         self.lines.set_limit(limit);
     }
+}
 
-    pub fn recent(&self, count: usize) -> Vec<HexLine> {
+pub struct PlotSeries {
-        self.lines.drain_recent(count)
+    pub name: String,
+    points: VecDeque<[f64; 2]>,
+    next_x: f64,
+}
+
+impl PlotSeries {
+    fn new(name: String) -> Self {
+        Self {
+            name,
+            points: VecDeque::new(),
+            next_x: 0.0,
+        }
+    }
+
+    fn push_samples(&mut self, samples: &[f64], limit: usize) {
+        for sample in samples {
+            if !sample.is_finite() {
+                continue;
+            }
+            self.push_point([self.next_x, *sample], limit);
+            self.next_x += 1.0;
+        }
+    }
+
+    fn push_point(&mut self, point: [f64; 2], limit: usize) -> Option<[f64; 2]> {
+        self.points.push_back(point);
+        if self.points.len() > limit {
+            self.points.pop_front()
+        } else {
+            None
+        }
+    }
+
+    pub fn points(&self) -> impl Iterator<Item = [f64; 2]> + '_ {
+        self.points.iter().copied()
+    }
+
+    pub fn len(&self) -> usize {
+        self.points.len()
+    }
+
+    fn first_point(&self) -> Option<[f64; 2]> {
+        self.points.front().copied()
+    }
+
+    fn last_point(&self) -> Option<[f64; 2]> {
+        self.points.back().copied()
+    }
+
+    pub fn render_points_time_series(
+        &self,
+        x_min: f64,
+        x_max: f64,
+        max_points: usize,
+    ) -> Vec<[f64; 2]> {
+        if self.points.is_empty() || max_points == 0 {
+            return Vec::new();
+        }
+
+        let mut exact_visible = Vec::with_capacity(max_points.min(self.points.len()));
+        for point in self.points.iter().copied() {
+            if point[0] < x_min {
+                continue;
+            }
+            if point[0] > x_max {
+                break;
+            }
+            exact_visible.push(point);
+            if exact_visible.len() > max_points {
+                exact_visible.clear();
+                break;
+            }
+        }
+        if !exact_visible.is_empty() {
+            return exact_visible;
+        }
+
+        let bucket_count = (max_points / 2).max(1);
+        let width = (x_max - x_min).max(1.0);
+        let bucket_width = width / bucket_count as f64;
+        let mut rendered = Vec::with_capacity(bucket_count * 2);
+        let mut points = self
+            .points
+            .iter()
+            .copied()
+            .skip_while(|point| point[0] < x_min)
+            .peekable();
+
+        for bucket_index in 0..bucket_count {
+            let bucket_start = x_min + bucket_width * bucket_index as f64;
+            let bucket_end = if bucket_index + 1 == bucket_count {
+                x_max
+            } else {
+                bucket_start + bucket_width
+            };
+
+            let mut min_point: Option<[f64; 2]> = None;
+            let mut max_point: Option<[f64; 2]> = None;
+
+            while let Some(point) = points.peek().copied() {
+                if point[0] > bucket_end {
+                    break;
+                }
+                if point[0] >= bucket_start {
+                    match min_point {
+                        Some(current) if current[1] <= point[1] => {}
+                        _ => min_point = Some(point),
+                    }
+                    match max_point {
+                        Some(current) if current[1] >= point[1] => {}
+                        _ => max_point = Some(point),
+                    }
+                }
+                points.next();
+            }
+
+            match (min_point, max_point) {
+                (Some(a), Some(b)) if a[0] <= b[0] => {
+                    rendered.push(a);
+                    if a != b {
+                        rendered.push(b);
+                    }
+                }
+                (Some(a), Some(b)) => {
+                    rendered.push(b);
+                    if a != b {
+                        rendered.push(a);
+                    }
+                }
+                (Some(a), None) | (None, Some(a)) => rendered.push(a),
+                (None, None) => {}
+            }
+        }
+
+        if rendered.len() > max_points {
+            let stride = rendered.len().div_ceil(max_points);
+            rendered.into_iter().step_by(stride).collect()
+        } else {
+            rendered
+        }
+    }
+
+    pub fn render_points_xy(&self, max_points: usize) -> Vec<[f64; 2]> {
+        if self.points.is_empty() || max_points == 0 {
+            return Vec::new();
+        }
+        if self.points.len() <= max_points {
+            return self.points.iter().copied().collect();
+        }
+
+        let stride = self.points.len().div_ceil(max_points);
+        self.points.iter().copied().step_by(stride).collect()
+    }
+}
+
+#[derive(Clone, Copy, PartialEq, Eq)]
+pub enum PlotSeriesKind {
+    TimeSeries,
+    XY,
+}
+
+#[derive(Clone, Copy)]
+struct BoundsRect {
+    min_x: f64,
+    max_x: f64,
+    min_y: f64,
+    max_y: f64,
+}
+
+impl BoundsRect {
+    fn from_point([x, y]: [f64; 2]) -> Option<Self> {
+        if !(x.is_finite() && y.is_finite()) {
+            return None;
+        }
+        Some(Self {
+            min_x: x,
+            max_x: x,
+            min_y: y,
+            max_y: y,
+        })
+    }
+
+    fn extend_with_point(&mut self, [x, y]: [f64; 2]) {
+        if !(x.is_finite() && y.is_finite()) {
+            return;
+        }
+        self.min_x = self.min_x.min(x);
+        self.max_x = self.max_x.max(x);
+        self.min_y = self.min_y.min(y);
+        self.max_y = self.max_y.max(y);
+    }
+
+    fn touches(&self, [x, y]: [f64; 2]) -> bool {
+        x == self.min_x || x == self.max_x || y == self.min_y || y == self.max_y
+    }
+}
+
+pub struct PlotBuffer {
+    limit: usize,
+    kind: PlotSeriesKind,
+    series: Vec<PlotSeries>,
+    time_series_y_bounds: Option<(f64, f64)>,
+    time_series_y_dirty: bool,
+    xy_bounds: Option<BoundsRect>,
+    xy_bounds_dirty: bool,
+}
+
+impl PlotBuffer {
+    pub fn new(limit: usize) -> Self {
+        Self {
+            limit,
+            kind: PlotSeriesKind::TimeSeries,
+            series: Vec::new(),
+            time_series_y_bounds: None,
+            time_series_y_dirty: false,
+            xy_bounds: None,
+            xy_bounds_dirty: false,
+        }
+    }
+
+    pub fn push(&mut self, entry: &DecodedEntry) {
+        if let DecodedData::Plot(frame) = &entry.data {
+            self.push_frame(&entry.pipeline_name, frame);
+        }
+    }
+
+    fn push_frame(&mut self, pipeline_name: &str, frame: &PlotFrame) {
+        let next_kind = match frame.format {
+            PlotFormat::XY => PlotSeriesKind::XY,
+            PlotFormat::Interleaved | PlotFormat::Block => PlotSeriesKind::TimeSeries,
+        };
+        if self.kind != next_kind {
+            self.invalidate_bounds();
+        }
+        self.kind = next_kind;
+
+        if matches!(frame.format, PlotFormat::XY) {
+            self.push_xy_frame(pipeline_name, frame);
+            return;
+        }
+
+        for (index, channel) in frame.channels.iter().enumerate() {
+            let series_name = if frame.channels.len() == 1 {
+                pipeline_name.to_owned()
+            } else {
+                format!("{pipeline_name}:ch{}", index + 1)
+            };
+
+            if let Some(series_index) = self
+                .series
+                .iter()
+                .position(|series| series.name == series_name)
+            {
+                for sample in channel {
+                    if !sample.is_finite() {
+                        continue;
+                    }
+                    let (point, removed) = {
+                        let series = &mut self.series[series_index];
+                        let point = [series.next_x, *sample];
+                        let removed = series.push_point(point, self.limit);
+                        series.next_x += 1.0;
+                        (point, removed)
+                    };
+                    if let Some(removed) = removed {
+                        self.note_time_series_removed(removed);
+                    }
+                    self.note_time_series_point(point);
+                }
+            } else {
+                let mut series = PlotSeries::new(series_name);
+                series.push_samples(channel, self.limit);
+                for point in series.points() {
+                    self.note_time_series_point(point);
+                }
+                self.series.push(series);
+            }
+        }
+    }
+
+    fn push_xy_frame(&mut self, pipeline_name: &str, frame: &PlotFrame) {
+        if frame.channels.len() < 2 {
+            return;
+        }
+
+        let x = &frame.channels[0];
+        let y = &frame.channels[1];
+        let len = x.len().min(y.len());
+        let series_name = format!("{pipeline_name}:xy");
+
+        let series_index = if let Some(index) = self
+            .series
+            .iter()
+            .position(|series| series.name == series_name)
+        {
+            index
+        } else {
+            self.series.push(PlotSeries::new(series_name));
+            self.series.len() - 1
+        };
+
+        for index in 0..len {
+            if !x[index].is_finite() || !y[index].is_finite() {
+                continue;
+            }
+            let point = [x[index], y[index]];
+            let removed = {
+                let series = &mut self.series[series_index];
+                series.push_point(point, self.limit)
+            };
+            if let Some(removed) = removed {
+                self.note_xy_removed(removed);
+            }
+            self.note_xy_point(point);
+        }
+    }
+
+    pub fn clear(&mut self) {
+        self.series.clear();
+        self.invalidate_bounds();
+    }
+
+    pub fn set_limit(&mut self, limit: usize) {
+        self.limit = limit;
+        for series in &mut self.series {
+            while series.points.len() > self.limit {
+                series.points.pop_front();
+            }
+        }
+        self.invalidate_bounds();
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.series.is_empty()
+    }
+
+    pub fn kind(&self) -> PlotSeriesKind {
+        self.kind
+    }
+
+    pub fn iter(&self) -> impl Iterator<Item = &PlotSeries> {
+        self.series.iter()
+    }
+
+    pub fn series_len(&self) -> usize {
+        self.series.len()
+    }
+
+    pub fn total_points(&self) -> usize {
+        self.series.iter().map(PlotSeries::len).sum()
+    }
+
+    pub fn bounds(&mut self) -> Option<([f64; 2], [f64; 2])> {
+        match self.kind {
+            PlotSeriesKind::TimeSeries => self.time_series_bounds(),
+            PlotSeriesKind::XY => self.xy_bounds(),
+        }
+    }
+
+    fn invalidate_bounds(&mut self) {
+        self.time_series_y_bounds = None;
+        self.time_series_y_dirty = false;
+        self.xy_bounds = None;
+        self.xy_bounds_dirty = false;
+    }
+
+    fn note_time_series_point(&mut self, point: [f64; 2]) {
+        if !point[1].is_finite() {
+            return;
+        }
+        match &mut self.time_series_y_bounds {
+            Some((min_y, max_y)) => {
+                *min_y = min_y.min(point[1]);
+                *max_y = max_y.max(point[1]);
+            }
+            None => self.time_series_y_bounds = Some((point[1], point[1])),
+        }
+    }
+
+    fn note_time_series_removed(&mut self, removed: [f64; 2]) {
+        if let Some((min_y, max_y)) = self.time_series_y_bounds
+            && (removed[1] == min_y || removed[1] == max_y)
+        {
+            self.time_series_y_dirty = true;
+        }
+    }
+
+    fn note_xy_point(&mut self, point: [f64; 2]) {
+        match &mut self.xy_bounds {
+            Some(bounds) => bounds.extend_with_point(point),
+            None => self.xy_bounds = BoundsRect::from_point(point),
+        }
+    }
+
+    fn note_xy_removed(&mut self, removed: [f64; 2]) {
+        if let Some(bounds) = self.xy_bounds
+            && bounds.touches(removed)
+        {
+            self.xy_bounds_dirty = true;
+        }
+    }
+
+    fn time_series_bounds(&mut self) -> Option<([f64; 2], [f64; 2])> {
+        let mut min_x = f64::INFINITY;
+        let mut max_x = f64::NEG_INFINITY;
+
+        for series in &self.series {
+            if let Some([x, _]) = series.first_point() {
+                min_x = min_x.min(x);
+            }
+            if let Some([x, _]) = series.last_point() {
+                max_x = max_x.max(x);
+            }
+        }
+
+        if !(min_x.is_finite() && max_x.is_finite()) {
+            return None;
+        }
+
+        if self.time_series_y_dirty {
+            self.recompute_time_series_y_bounds();
+        }
+        let (mut min_y, mut max_y) = self.time_series_y_bounds?;
+        if min_y == max_y {
+            min_y -= 1.0;
+            max_y += 1.0;
+        }
+        Some(([min_x, min_y], [max_x, max_y]))
+    }
+
+    fn xy_bounds(&mut self) -> Option<([f64; 2], [f64; 2])> {
+        if self.xy_bounds_dirty {
+            self.recompute_xy_bounds();
+        }
+        let bounds = self.xy_bounds?;
+        let mut min_x = bounds.min_x;
+        let mut max_x = bounds.max_x;
+        let mut min_y = bounds.min_y;
+        let mut max_y = bounds.max_y;
+        if min_x == max_x {
+            min_x -= 1.0;
+            max_x += 1.0;
+        }
+        if min_y == max_y {
+            min_y -= 1.0;
+            max_y += 1.0;
+        }
+        Some(([min_x, min_y], [max_x, max_y]))
+    }
+
+    fn recompute_time_series_y_bounds(&mut self) {
+        let mut min_y = f64::INFINITY;
+        let mut max_y = f64::NEG_INFINITY;
+
+        for series in &self.series {
+            for [_, y] in series.points() {
+                if y.is_finite() {
+                    min_y = min_y.min(y);
+                    max_y = max_y.max(y);
+                }
+            }
+        }
+
+        self.time_series_y_bounds = if min_y.is_finite() && max_y.is_finite() {
+            Some((min_y, max_y))
+        } else {
+            None
+        };
+        self.time_series_y_dirty = false;
+    }
+
+    fn recompute_xy_bounds(&mut self) {
+        let mut bounds: Option<BoundsRect> = None;
+
+        for series in &self.series {
+            for point in series.points() {
+                match &mut bounds {
+                    Some(existing) => existing.extend_with_point(point),
+                    None => bounds = BoundsRect::from_point(point),
+                }
+            }
+        }
+
+        self.xy_bounds = bounds;
+        self.xy_bounds_dirty = false;
     }
 }
 

crates/pipeview-tui/src/main.rs

@@ -1,3 +1,4 @@
+mod ansi;
 mod app;
 mod app_state;
 mod buffers;
@@ -6,33 +7,59 @@ mod ui;
 use std::io;
 
 use crossterm::{
+    event::{DisableMouseCapture, EnableMouseCapture},
     execute,
     terminal::{EnterAlternateScreen, LeaveAlternateScreen, disable_raw_mode, enable_raw_mode},
 };
 use ratatui::{Terminal, backend::CrosstermBackend};
-use pipeview_client::SessionManager;
+use tracing_appender::non_blocking::WorkerGuard;
+use tracing_subscriber::{EnvFilter, fmt};
+
+use crate::app::App;
 
 #[tokio::main]
 async fn main() -> io::Result<()> {
-    tracing_subscriber::fmt()
+    let _log_guard = init_tracing();
-        .with_env_filter(tracing_subscriber::EnvFilter::from_default_env())
-        .init();
 
     enable_raw_mode()?;
     let mut stdout = io::stdout();
-    execute!(stdout, EnterAlternateScreen)?;
+    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
-
     let backend = CrosstermBackend::new(stdout);
     let mut terminal = Terminal::new(backend)?;
 
-    let manager = SessionManager::new();
+    let result = async {
-    let rx = manager.subscribe();
+        let mut app = App::new();
-
+        app.run(&mut terminal).await?;
-    let result = app::run(&mut terminal, app::App::new(manager, rx));
+        app.shutdown().await;
+        io::Result::Ok(())
+    }
+    .await;
 
     disable_raw_mode()?;
-    execute!(terminal.backend_mut(), LeaveAlternateScreen)?;
+    execute!(
+        terminal.backend_mut(),
+        LeaveAlternateScreen,
+        DisableMouseCapture
+    )?;
     terminal.show_cursor()?;
 
     result
 }
+
+fn init_tracing() -> Option<WorkerGuard> {
+    let filter = EnvFilter::try_from_default_env()
+        .unwrap_or_else(|_| EnvFilter::new("pipeview_tui=info,pipeview_client=info"));
+    let log_dir = app_state::config_dir();
+    let _ = std::fs::create_dir_all(&log_dir);
+    let file_appender = tracing_appender::rolling::never(log_dir, "tui.log");
+    let (writer, guard) = tracing_appender::non_blocking(file_appender);
+
+    fmt()
+        .with_env_filter(filter)
+        .with_target(false)
+        .with_ansi(false)
+        .with_writer(writer)
+        .try_init()
+        .ok()
+        .map(|_| guard)
+}