feat(tui): add quit-preserve-screen key binding

crates/trippy-tui/src/config/binding.rs

@@ -47,6 +47,7 @@ pub struct TuiBindings {
     pub toggle_as_info: TuiKeyBinding,
     pub toggle_hop_details: TuiKeyBinding,
     pub quit: TuiKeyBinding,
+    pub quit_preserve_screen: TuiKeyBinding,
 }
 
 impl Default for TuiBindings {
@@ -98,6 +99,10 @@ impl Default for TuiBindings {
             toggle_as_info: TuiKeyBinding::new(KeyCode::Char('z')),
             toggle_hop_details: TuiKeyBinding::new(KeyCode::Char('d')),
             quit: TuiKeyBinding::new(KeyCode::Char('q')),
+            quit_preserve_screen: TuiKeyBinding::new_with_modifier(
+                KeyCode::Char('q'),
+                KeyModifiers::SHIFT,
+            ),
         }
     }
 }
@@ -151,6 +156,7 @@ impl TuiBindings {
             (self.toggle_as_info, TuiCommandItem::ToggleASInfo),
             (self.toggle_hop_details, TuiCommandItem::ToggleHopDetails),
             (self.quit, TuiCommandItem::Quit),
+            (self.quit_preserve_screen, TuiCommandItem::Quit),
         ]
         .iter()
         .fold(
@@ -326,6 +332,10 @@ impl From<(HashMap<TuiCommandItem, TuiKeyBinding>, ConfigBindings)> for TuiBindi
                 .get(&TuiCommandItem::Quit)
                 .or(cfg.quit.as_ref())
                 .unwrap_or(&Self::default().quit),
+            quit_preserve_screen: *cmd_items
+                .get(&TuiCommandItem::QuitPreserveScreen)
+                .or(cfg.quit_preserve_screen.as_ref())
+                .unwrap_or(&Self::default().quit_preserve_screen),
         }
     }
 }
@@ -628,4 +638,6 @@ pub enum TuiCommandItem {
     ToggleHopDetails,
     /// Quit the application.
     Quit,
+    /// Quit the application and preserve the screen.
+    QuitPreserveScreen,
 }

crates/trippy-tui/src/config/file.rs

@@ -398,6 +398,7 @@ pub struct ConfigBindings {
     pub toggle_as_info: Option<TuiKeyBinding>,
     pub toggle_hop_details: Option<TuiKeyBinding>,
     pub quit: Option<TuiKeyBinding>,
+    pub quit_preserve_screen: Option<TuiKeyBinding>,
 }
 
 impl Default for ConfigBindings {
@@ -442,6 +443,7 @@ impl Default for ConfigBindings {
             toggle_as_info: Some(bindings.toggle_as_info),
             toggle_hop_details: Some(bindings.toggle_hop_details),
             quit: Some(bindings.quit),
+            quit_preserve_screen: Some(bindings.quit_preserve_screen),
         }
     }
 }

crates/trippy-tui/src/frontend.rs

@@ -46,7 +46,7 @@ pub fn run_frontend(
     let preserve_screen = tui_config.preserve_screen;
     let res = run_app(&mut terminal, traces, tui_config, resolver, geoip_lookup);
     disable_raw_mode()?;
-    if preserve_screen {
+    if preserve_screen || matches!(res, Ok(ExitAction::PreserveScreen)) {
         terminal.set_cursor_position(Position::new(0, terminal.size()?.height))?;
         terminal.backend_mut().append_lines(1)?;
     } else {
@@ -59,14 +59,22 @@ pub fn run_frontend(
     Ok(())
 }
 
+/// The exit action to take when the frontend exits.
+enum ExitAction {
+    /// Exit the frontend normally.
+    Normal,
+    /// Preserve the screen on exit.
+    PreserveScreen,
+}
+
 #[allow(clippy::too_many_lines, clippy::cognitive_complexity)]
 fn run_app<B: Backend>(
     terminal: &mut Terminal<B>,
     trace_info: Vec<TraceInfo>,
     tui_config: TuiConfig,
     resolver: DnsResolver,
     geoip_lookup: GeoIpLookup,
-) -> io::Result<()> {
+) -> io::Result<ExitAction> {
     let mut app = TuiApp::new(tui_config, resolver, geoip_lookup, trace_info);
     loop {
         if app.frozen_start.is_none() {
@@ -227,7 +235,9 @@ fn run_app<B: Backend>(
                     } else if bindings.toggle_hop_details.check(key) {
                         app.toggle_hop_details();
                     } else if bindings.quit.check(key) || CTRL_C.check(key) {
-                        return Ok(());
+                        return Ok(ExitAction::Normal);
+                    } else if bindings.quit_preserve_screen.check(key) {
+                        return Ok(ExitAction::PreserveScreen);
                     }
                 }
             }

crates/trippy-tui/src/frontend/binding.rs

@@ -43,6 +43,7 @@ pub struct Bindings {
     pub toggle_as_info: KeyBinding,
     pub toggle_hop_details: KeyBinding,
     pub quit: KeyBinding,
+    pub quit_preserve_screen: KeyBinding,
 }
 
 impl From<TuiBindings> for Bindings {
@@ -85,6 +86,7 @@ impl From<TuiBindings> for Bindings {
             toggle_as_info: KeyBinding::from(value.toggle_as_info),
             toggle_hop_details: KeyBinding::from(value.toggle_hop_details),
             quit: KeyBinding::from(value.quit),
+            quit_preserve_screen: KeyBinding::from(value.quit_preserve_screen),
         }
     }
 }

trippy-config-sample.toml

@@ -424,3 +424,4 @@ clear-selection = "esc"
 toggle-as-info = "z"
 toggle-hop-details = "d"
 quit = "q"
+quit-preserve-screen = "shit+q"