errors

src/tui/mod.rs

@@ -1,20 +1,20 @@
 use ratatui_themes::{Theme, ThemeName};
-use regex::bytes::Regex;
 use std::{
+    cell::RefCell,
     fs::{self, DirEntry},
     io,
     ops::ControlFlow,
     path::{Path, PathBuf},
     process::exit,
     rc::Rc,
+    time::Instant,
 };
 use tui_widget_list::{ListBuilder, ListView};
 
 use crate::tui::{
     filter::FilterKind,
     log_viewer::{InputState, InputTarget, LogViewer},
-    model::pretty_print_value,
+    widgets::{hyperlink::Hyperlink, items::Items, last_error::LastError},
-    widgets::{hyperlink::Hyperlink, items::Items, line_text::Highlighted},
 };
 use crate::tui::{
     filter::{Filter, Matcher},
@@ -27,7 +27,7 @@ use ratatui::{
     buffer::Buffer,
     crossterm::event::{self, Event, KeyCode, KeyEvent, KeyModifiers},
     layout::{Constraint, HorizontalAlignment, Layout, Rect},
-    style::Style,
+    style::{self, Style},
     text::Line,
     widgets::{
         Block, Clear, List, ListItem, ListState, Padding, Paragraph, StatefulWidget, Widget, Wrap,
@@ -116,6 +116,8 @@ struct App {
     compiler_root: Option<PathBuf>,
     current_file: Option<LogfileReader>,
     theme: Theme,
+
+    last_error: LastError,
 }
 
 impl App {
@@ -126,6 +128,7 @@ impl App {
             logs_dir,
             compiler_root,
             theme,
+            last_error: LastError::new(),
         };
         res.replace_tab(res.choose_file());
         res
@@ -356,6 +359,8 @@ impl App {
 
     fn run(mut self, mut terminal: DefaultTerminal) -> io::Result<()> {
         loop {
+            self.last_error.check_expired();
+
             terminal.draw(|frame| frame.render_widget(&mut self, frame.area()))?;
 
             if let Event::Key(key) = event::read()? {
@@ -376,12 +381,14 @@ impl App {
         let highlighted = Style::new().fg(palette.accent).bg(palette.selection);
         let border = Style::new().fg(palette.fg).bg(palette.bg);
         let border_highlighted = Style::new().fg(palette.secondary).bg(palette.bg);
+        let error = Style::new().fg(palette.error).bg(palette.bg);
 
         Styles {
             default,
             highlighted,
             border,
             border_highlighted,
+            error,
         }
     }
 
@@ -400,11 +407,12 @@ impl App {
     }
 }
 
-struct Styles {
+pub struct Styles {
     default: Style,
     highlighted: Style,
     border: Style,
     border_highlighted: Style,
+    error: Style,
 }
 
 impl Widget for &mut App {
@@ -471,6 +479,8 @@ impl Widget for &mut App {
             .style(styles.default)
             .render(middle, buf);
 
+        let [right, error] =
+            Layout::vertical([Constraint::Length(1), Constraint::Length(1)]).areas(right);
         Paragraph::new("").style(styles.default).render(right, buf);
 
         for tab in &mut self.tabs {
@@ -533,6 +543,7 @@ impl Widget for &mut App {
                                 .get(idx)
                                 .map(|(a, b)| (a.clone(), b.clone()))
                         }),
+                        self.last_error.clone(),
                     )
                     .styled_ref(&styles)
                     .render(main_area, buf);
@@ -575,6 +586,8 @@ impl Widget for &mut App {
                     Paragraph::new(HELP_TEXT).render(popup_area, buf);
                 }
             }
+
+            self.last_error.clone().styled(&styles).render(error, buf);
         }
     }
 }

src/tui/widgets/items.rs

@@ -1,4 +1,4 @@
-use std::rc::Rc;
+use std::{cell::OnceCell, rc::Rc};
 
 use itertools::Itertools;
 use ratatui::widgets::{List, ListItem, Widget};
@@ -8,6 +8,7 @@ use crate::tui::{
     log_viewer::{FieldMatcher, InputState, InputTarget},
     model::LogEntry,
     widgets::{
+        last_error::LastError,
         line_text::Highlighted,
         styled::{IntoStyled, Styled},
     },
@@ -92,6 +93,7 @@ pub struct Items<'a> {
     input_state: &'a InputState,
 
     selected_footer_field: Option<(String, String)>,
+    last_error: LastError,
 }
 
 impl<'a> Items<'a> {
@@ -100,12 +102,14 @@ impl<'a> Items<'a> {
         selected_offset: usize,
         input_state: &'a InputState,
         selected_footer_field: Option<(String, String)>,
+        last_error: LastError,
     ) -> Self {
         Self {
             items,
             selected_offset,
             input_state,
             selected_footer_field,
+            last_error,
         }
     }
 
@@ -120,6 +124,7 @@ impl Widget for Styled<'_, &Items<'_>> {
         Self: Sized,
     {
         let ts = TreeState::from_items(&self.items);
+        let regex_cache = OnceCell::new();
 
         let list = List::new(
             self.inner
@@ -161,8 +166,13 @@ impl Widget for Styled<'_, &Items<'_>> {
                                 }
                             }
                             FieldMatcher::Regex(r) => {
-                                if let Ok(regex) = Regex::new(r)
+                                if let Ok(regex) = regex_cache.get_or_init(|| {
-                                    && let Some(start_offset) = line.message.find(msg)
+                                    let regex = Regex::new(r);
+                                    if let Err(e) = &regex {
+                                        self.last_error.set(format!("{e}"));
+                                    }
+                                    regex
+                                }) && let Some(start_offset) = line.message.find(msg)
                                     && let Some(m) = regex.find(msg)
                                 {
                                     let from = start_offset + m.start();

src/tui/widgets/last_error.rs

@@ -0,0 +1,50 @@
+use std::{cell::RefCell, rc::Rc, time::Instant};
+
+use ratatui::widgets::{Paragraph, Widget};
+
+use crate::tui::widgets::styled::Styled;
+
+#[derive(Clone)]
+pub struct LastError {
+    inner: Rc<RefCell<Option<(String, Instant)>>>,
+}
+
+impl LastError {
+    pub fn new() -> Self {
+        Self {
+            inner: Rc::new(RefCell::new(None)),
+        }
+    }
+
+    pub fn set(&self, s: String) {
+        *self.inner.borrow_mut() = Some((s, Instant::now()));
+    }
+
+    pub fn check_expired(&self) {
+        let inner = self.inner.borrow();
+        if let Some((_, time)) = *inner {
+            if Instant::now().duration_since(time).as_secs_f64() > 1.0 {
+                drop(inner);
+                *self.inner.borrow_mut() = None;
+            }
+        }
+    }
+}
+
+impl Widget for Styled<'_, LastError> {
+    fn render(self, area: ratatui::prelude::Rect, buf: &mut ratatui::prelude::Buffer)
+    where
+        Self: Sized,
+    {
+        Paragraph::new(
+            self.inner
+                .inner
+                .borrow()
+                .as_ref()
+                .map(|i| i.0.replace("\n", ""))
+                .unwrap_or_default(),
+        )
+        .style(self.styles.error)
+        .render(area, buf);
+    }
+}

src/tui/widgets/mod.rs

@@ -1,4 +1,5 @@
 pub mod hyperlink;
 pub mod items;
+pub mod last_error;
 pub mod line_text;
 pub mod styled;