Make context line permanent (#4699)

https://github.com/user-attachments/assets/f72c64de-8d6a-45b6-93df-f3a68038067f

Author: dedrisian-oai

codex-rs/tui/src/bottom_pane/chat_composer.rs

@@ -149,7 +149,7 @@ impl ChatComposer {
             paste_burst: PasteBurst::default(),
             disable_paste_burst: false,
             custom_prompts: Vec::new(),
-            footer_mode: FooterMode::ShortcutPrompt,
+            footer_mode: FooterMode::ShortcutSummary,
             footer_hint_override: None,
             context_window_percent: None,
         };
@@ -1345,8 +1345,8 @@ impl ChatComposer {
             FooterMode::EscHint => FooterMode::EscHint,
             FooterMode::ShortcutOverlay => FooterMode::ShortcutOverlay,
             FooterMode::CtrlCReminder => FooterMode::CtrlCReminder,
-            FooterMode::ShortcutPrompt if self.ctrl_c_quit_hint => FooterMode::CtrlCReminder,
-            FooterMode::ShortcutPrompt if !self.is_empty() => FooterMode::Empty,
+            FooterMode::ShortcutSummary if self.ctrl_c_quit_hint => FooterMode::CtrlCReminder,
+            FooterMode::ShortcutSummary if !self.is_empty() => FooterMode::ContextOnly,
             other => other,
         }
     }
@@ -1779,11 +1779,11 @@ mod tests {
 
         // Toggle back to prompt mode so subsequent typing captures characters.
         let _ = composer.handle_key_event(KeyEvent::new(KeyCode::Char('?'), KeyModifiers::NONE));
-        assert_eq!(composer.footer_mode, FooterMode::ShortcutPrompt);
+        assert_eq!(composer.footer_mode, FooterMode::ShortcutSummary);
 
         type_chars_humanlike(&mut composer, &['h']);
         assert_eq!(composer.textarea.text(), "h");
-        assert_eq!(composer.footer_mode(), FooterMode::Empty);
+        assert_eq!(composer.footer_mode(), FooterMode::ContextOnly);
 
         let (result, needs_redraw) =
             composer.handle_key_event(KeyEvent::new(KeyCode::Char('?'), KeyModifiers::NONE));
@@ -1792,8 +1792,8 @@ mod tests {
         std::thread::sleep(ChatComposer::recommended_paste_flush_delay());
         let _ = composer.flush_paste_burst_if_due();
         assert_eq!(composer.textarea.text(), "h?");
-        assert_eq!(composer.footer_mode, FooterMode::ShortcutPrompt);
-        assert_eq!(composer.footer_mode(), FooterMode::Empty);
+        assert_eq!(composer.footer_mode, FooterMode::ShortcutSummary);
+        assert_eq!(composer.footer_mode(), FooterMode::ContextOnly);
     }
 
     #[test]

codex-rs/tui/src/bottom_pane/footer.rs

@@ -23,10 +23,10 @@ pub(crate) struct FooterProps {
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub(crate) enum FooterMode {
     CtrlCReminder,
-    ShortcutPrompt,
+    ShortcutSummary,
     ShortcutOverlay,
     EscHint,
-    Empty,
+    ContextOnly,
 }
 
 pub(crate) fn toggle_shortcut_mode(current: FooterMode, ctrl_c_hint: bool) -> FooterMode {
@@ -35,7 +35,7 @@ pub(crate) fn toggle_shortcut_mode(current: FooterMode, ctrl_c_hint: bool) -> Fo
     }
 
     match current {
-        FooterMode::ShortcutOverlay | FooterMode::CtrlCReminder => FooterMode::ShortcutPrompt,
+        FooterMode::ShortcutOverlay | FooterMode::CtrlCReminder => FooterMode::ShortcutSummary,
         _ => FooterMode::ShortcutOverlay,
     }
 }
@@ -53,7 +53,7 @@ pub(crate) fn reset_mode_after_activity(current: FooterMode) -> FooterMode {
         FooterMode::EscHint
         | FooterMode::ShortcutOverlay
         | FooterMode::CtrlCReminder
-        | FooterMode::Empty => FooterMode::ShortcutPrompt,
+        | FooterMode::ContextOnly => FooterMode::ShortcutSummary,
         other => other,
     }
 }
@@ -72,26 +72,29 @@ pub(crate) fn render_footer(area: Rect, buf: &mut Buffer, props: FooterProps) {
 }
 
 fn footer_lines(props: FooterProps) -> Vec<Line<'static>> {
+    // Show the context indicator on the left, appended after the primary hint
+    // (e.g., "? for shortcuts"). Keep it visible even when typing (i.e., when
+    // the shortcut hint is hidden). Hide it only for the multi-line
+    // ShortcutOverlay.
     match props.mode {
         FooterMode::CtrlCReminder => vec![ctrl_c_reminder_line(CtrlCReminderState {
             is_task_running: props.is_task_running,
         })],
-        FooterMode::ShortcutPrompt => {
-            if props.is_task_running {
-                vec![context_window_line(props.context_window_percent)]
-            } else {
-                vec![Line::from(vec![
-                    key_hint::plain(KeyCode::Char('?')).into(),
-                    " for shortcuts".dim(),
-                ])]
-            }
+        FooterMode::ShortcutSummary => {
+            let mut line = context_window_line(props.context_window_percent);
+            line.push_span(" · ".dim());
+            line.extend(vec![
+                key_hint::plain(KeyCode::Char('?')).into(),
+                " for shortcuts".dim(),
+            ]);
+            vec![line]
         }
         FooterMode::ShortcutOverlay => shortcut_overlay_lines(ShortcutsState {
             use_shift_enter_hint: props.use_shift_enter_hint,
             esc_backtrack_hint: props.esc_backtrack_hint,
         }),
         FooterMode::EscHint => vec![esc_hint_line(props.esc_backtrack_hint)],
-        FooterMode::Empty => Vec::new(),
+        FooterMode::ContextOnly => vec![context_window_line(props.context_window_percent)],
     }
 }
 
@@ -219,18 +222,8 @@ fn build_columns(entries: Vec<Line<'static>>) -> Vec<Line<'static>> {
 }
 
 fn context_window_line(percent: Option<u8>) -> Line<'static> {
-    let mut spans: Vec<Span<'static>> = Vec::new();
-    match percent {
-        Some(percent) => {
-            spans.push(format!("{percent}%").dim());
-            spans.push(" context left".dim());
-        }
-        None => {
-            spans.push(key_hint::plain(KeyCode::Char('?')).into());
-            spans.push(" for shortcuts".dim());
-        }
-    }
-    Line::from(spans)
+    let percent = percent.unwrap_or(100);
+    Line::from(vec![Span::from(format!("{percent}% context left")).dim()])
 }
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
@@ -402,7 +395,7 @@ mod tests {
         snapshot_footer(
             "footer_shortcuts_default",
             FooterProps {
-                mode: FooterMode::ShortcutPrompt,
+                mode: FooterMode::ShortcutSummary,
                 esc_backtrack_hint: false,
                 use_shift_enter_hint: false,
                 is_task_running: false,
@@ -468,7 +461,7 @@ mod tests {
         snapshot_footer(
             "footer_shortcuts_context_running",
             FooterProps {
-                mode: FooterMode::ShortcutPrompt,
+                mode: FooterMode::ShortcutSummary,
                 esc_backtrack_hint: false,
                 use_shift_enter_hint: false,
                 is_task_running: true,

codex-rs/tui/src/bottom_pane/snapshots/codex_tui__bottom_pane__chat_composer__tests__backspace_after_pastes.snap

@@ -11,4 +11,4 @@ expression: terminal.backend()
 "                                                                                                    "
 "                                                                                                    "
 "                                                                                                    "
-"                                                                                                    "
+"  100% context left                                                                                 "

codex-rs/tui/src/bottom_pane/snapshots/codex_tui__bottom_pane__chat_composer__tests__empty.snap

@@ -1,6 +1,5 @@
 ---
 source: tui/src/bottom_pane/chat_composer.rs
-assertion_line: 1938
 expression: terminal.backend()
 ---
 "                                                                                                    "
@@ -12,4 +11,4 @@ expression: terminal.backend()
 "                                                                                                    "
 "                                                                                                    "
 "                                                                                                    "
-"  ? for shortcuts                                                                                   "
+"  100% context left · ? for shortcuts                                                               "

codex-rs/tui/src/bottom_pane/snapshots/codex_tui__bottom_pane__chat_composer__tests__footer_mode_ctrl_c_interrupt.snap

@@ -1,6 +1,5 @@
 ---
 source: tui/src/bottom_pane/chat_composer.rs
-assertion_line: 1497
 expression: terminal.backend()
 ---
 "                                                                                                    "

codex-rs/tui/src/bottom_pane/snapshots/codex_tui__bottom_pane__chat_composer__tests__footer_mode_ctrl_c_quit.snap

@@ -1,6 +1,5 @@
 ---
 source: tui/src/bottom_pane/chat_composer.rs
-assertion_line: 1497
 expression: terminal.backend()
 ---
 "                                                                                                    "

codex-rs/tui/src/bottom_pane/snapshots/codex_tui__bottom_pane__chat_composer__tests__footer_mode_ctrl_c_then_esc_hint.snap

@@ -1,6 +1,5 @@
 ---
 source: tui/src/bottom_pane/chat_composer.rs
-assertion_line: 1497
 expression: terminal.backend()
 ---
 "                                                                                                    "

codex-rs/tui/src/bottom_pane/snapshots/codex_tui__bottom_pane__chat_composer__tests__footer_mode_esc_hint_backtrack.snap

@@ -1,6 +1,5 @@
 ---
 source: tui/src/bottom_pane/chat_composer.rs
-assertion_line: 1497
 expression: terminal.backend()
 ---
 "                                                                                                    "

codex-rs/tui/src/bottom_pane/snapshots/codex_tui__bottom_pane__chat_composer__tests__footer_mode_esc_hint_from_overlay.snap

@@ -1,6 +1,5 @@
 ---
 source: tui/src/bottom_pane/chat_composer.rs
-assertion_line: 1497
 expression: terminal.backend()
 ---
 "                                                                                                    "

codex-rs/tui/src/bottom_pane/snapshots/codex_tui__bottom_pane__chat_composer__tests__footer_mode_hidden_while_typing.snap

@@ -10,3 +10,4 @@ expression: terminal.backend()
 "                                                                                                    "
 "                                                                                                    "
 "                                                                                                    "
+"  100% context left                                                                                 "