Add and use new Signals struct (#13314)

# Description
This PR introduces a new `Signals` struct to replace our adhoc passing
around of `ctrlc: Option<Arc<AtomicBool>>`. Doing so has a few benefits:
- We can better enforce when/where resetting or triggering an interrupt
is allowed.
- Consolidates `nu_utils::ctrl_c::was_pressed` and other ad-hoc
re-implementations into a single place: `Signals::check`.
- This allows us to add other types of signals later if we want. E.g.,
exiting or suspension.
- Similarly, we can more easily change the underlying implementation if
we need to in the future.
- Places that used to have a `ctrlc` of `None` now use
`Signals::empty()`, so we can double check these usages for correctness
in the future.

crates/nu-table/src/types/expanded.rs

@@ -102,9 +102,7 @@ fn expanded_table_list(input: &[Value], cfg: Cfg<'_>) -> TableResult {
         }
 
         for (row, item) in input.iter().enumerate() {
-            if nu_utils::ctrl_c::was_pressed(&cfg.opts.ctrlc) {
-                return Ok(None);
-            }
+            cfg.opts.signals.check(cfg.opts.span)?;
 
             if let Value::Error { error, .. } = item {
                 return Err(*error.clone());
@@ -143,9 +141,7 @@ fn expanded_table_list(input: &[Value], cfg: Cfg<'_>) -> TableResult {
         }
 
         for (row, item) in input.iter().enumerate() {
-            if nu_utils::ctrl_c::was_pressed(&cfg.opts.ctrlc) {
-                return Ok(None);
-            }
+            cfg.opts.signals.check(cfg.opts.span)?;
 
             if let Value::Error { error, .. } = item {
                 return Err(*error.clone());
@@ -230,9 +226,7 @@ fn expanded_table_list(input: &[Value], cfg: Cfg<'_>) -> TableResult {
         }
 
         for (row, item) in input.iter().enumerate() {
-            if nu_utils::ctrl_c::was_pressed(&cfg.opts.ctrlc) {
-                return Ok(None);
-            }
+            cfg.opts.signals.check(cfg.opts.span)?;
 
             if let Value::Error { error, .. } = item {
                 return Err(*error.clone());
@@ -353,9 +347,7 @@ fn expanded_table_kv(record: &Record, cfg: Cfg<'_>) -> StringResult {
 
     let mut data = Vec::with_capacity(record.len());
     for (key, value) in record {
-        if nu_utils::ctrl_c::was_pressed(&cfg.opts.ctrlc) {
-            return Ok(None);
-        }
+        cfg.opts.signals.check(cfg.opts.span)?;
 
         let (value, is_expanded) = match expand_table_value(value, value_width, &cfg)? {
             Some(val) => val,

crates/nu-table/src/types/general.rs

@@ -43,9 +43,7 @@ fn create_table(input: &[Value], opts: TableOpts<'_>) -> Result<Option<String>,
 fn kv_table(record: &Record, opts: TableOpts<'_>) -> StringResult {
     let mut data = vec![Vec::with_capacity(2); record.len()];
     for ((column, value), row) in record.iter().zip(data.iter_mut()) {
-        if nu_utils::ctrl_c::was_pressed(&opts.ctrlc) {
-            return Ok(None);
-        }
+        opts.signals.check(opts.span)?;
 
         let value = nu_value_to_string_colored(value, opts.config, opts.style_computer);
 
@@ -123,9 +121,7 @@ fn to_table_with_header(
     }
 
     for (row, item) in input.iter().enumerate() {
-        if nu_utils::ctrl_c::was_pressed(&opts.ctrlc) {
-            return Ok(None);
-        }
+        opts.signals.check(opts.span)?;
 
         if let Value::Error { error, .. } = item {
             return Err(*error.clone());
@@ -158,9 +154,7 @@ fn to_table_with_no_header(
     table.set_index_style(get_index_style(opts.style_computer));
 
     for (row, item) in input.iter().enumerate() {
-        if nu_utils::ctrl_c::was_pressed(&opts.ctrlc) {
-            return Ok(None);
-        }
+        opts.signals.check(opts.span)?;
 
         if let Value::Error { error, .. } = item {
             return Err(*error.clone());

crates/nu-table/src/types/mod.rs

@@ -8,8 +8,7 @@ pub use general::JustTable;
 
 use crate::{common::INDEX_COLUMN_NAME, NuTable};
 use nu_color_config::StyleComputer;
-use nu_protocol::{Config, Span, TableIndexMode, TableMode};
-use std::sync::{atomic::AtomicBool, Arc};
+use nu_protocol::{Config, Signals, Span, TableIndexMode, TableMode};
 
 pub struct TableOutput {
     pub table: NuTable,
@@ -29,7 +28,7 @@ impl TableOutput {
 
 #[derive(Debug, Clone)]
 pub struct TableOpts<'a> {
-    ctrlc: Option<Arc<AtomicBool>>,
+    signals: &'a Signals,
     config: &'a Config,
     style_computer: &'a StyleComputer<'a>,
     span: Span,
@@ -45,7 +44,7 @@ impl<'a> TableOpts<'a> {
     pub fn new(
         config: &'a Config,
         style_computer: &'a StyleComputer<'a>,
-        ctrlc: Option<Arc<AtomicBool>>,
+        signals: &'a Signals,
         span: Span,
         width: usize,
         indent: (usize, usize),
@@ -54,7 +53,7 @@ impl<'a> TableOpts<'a> {
         index_remove: bool,
     ) -> Self {
         Self {
-            ctrlc,
+            signals,
             config,
             style_computer,
             span,