Fix latency-probe races, stale offline menu, and byte formatting

lib/format.js

@@ -16,7 +16,7 @@ function scale(n) {
 // "2.4 MB", human readable with a space.
 export function formatBytes(n) {
     const [v, i] = scale(n);
-    const digits = i === 0 ? 0 : v < 10 ? 1 : v < 100 ? 1 : 0;
+    const digits = i === 0 ? 0 : v < 10 ? 2 : v < 100 ? 1 : 0;
     return `${v.toFixed(digits)} ${UNITS[i]}`;
 }
 

lib/indicator.js

@@ -35,6 +35,8 @@ class SingBoxIndicator extends PanelMenu.Button {
         this._selectorItems = new Map();
         this._proxiesMap = {};
         this._delays = new Map();    // node name -> ms number | 'timeout'
+        this._probing = new Set();   // nodes with a latency probe in flight
+        this._apiUrl = '';
         this._polling = false;
         this._cancellable = new Gio.Cancellable();
 
@@ -131,14 +133,18 @@ class SingBoxIndicator extends PanelMenu.Button {
     // ---- Settings -----------------------------------------------------
 
     _onSettingsChanged() {
+        // Latencies measured against one instance are meaningless for another.
+        if (this._settings.get_string('api-url') !== this._apiUrl)
+            this._delays.clear();
         this._applySettings();
         this._restartPolling();
         this._poll();
     }
 
     _applySettings() {
+        this._apiUrl = this._settings.get_string('api-url');
         this._api.setEndpoint(
-            this._settings.get_string('api-url'),
+            this._apiUrl,
             this._settings.get_string('api-secret')
         );
         this._interval = this._settings.get_int('refresh-interval');
@@ -299,6 +305,9 @@ class SingBoxIndicator extends PanelMenu.Button {
                 entry.setOrnament(isCurrent
                     ? PopupMenu.Ornament.DOT
                     : PopupMenu.Ornament.NONE);
+                // Don't overwrite the "…" placeholder while a probe is running.
+                if (this._probing.has(member))
+                    continue;
                 entry.label.text = this._memberLabelText(member, map[member]);
             }
         }
@@ -340,6 +349,16 @@ class SingBoxIndicator extends PanelMenu.Button {
         }
     }
 
+    // Drop menu content that would otherwise stay clickable while offline.
+    _clearMenuData() {
+        this._selectorsSection.removeAll();
+        this._selectorItems.clear();
+        this._selectorSignature = null;
+        this._probing.clear();
+        this._connItem.menu.removeAll();
+        this._connItem.label.text = `${_('Connections')}: —`;
+    }
+
     _pickPanelGroup(selectors) {
         if (selectors.length === 0)
             return null;
@@ -384,6 +403,7 @@ class SingBoxIndicator extends PanelMenu.Button {
         if (!stored)
             return;
         for (const [member, item] of stored.members) {
+            this._probing.add(member);
             item.label.text = `${member}  ·  …`;
             this._api.getDelay(member, {}, this._cancellable)
                 .then(res => {
@@ -394,9 +414,14 @@ class SingBoxIndicator extends PanelMenu.Button {
                     this._delays.set(member, 'timeout');
                 })
                 .finally(() => {
+                    this._probing.delete(member);
                     if (this._cancellable.is_cancelled())
                         return;
-                    item.label.text = this._memberLabelText(member, this._proxiesMap?.[member]);
+                    // Re-resolve the row: the menu may have been rebuilt while
+                    // the probe was in flight, disposing the captured actor.
+                    const cur = this._selectorItems.get(groupName)?.members.get(member);
+                    if (cur)
+                        cur.label.text = this._memberLabelText(member, this._proxiesMap?.[member]);
                 });
         }
     }
@@ -423,13 +448,12 @@ class SingBoxIndicator extends PanelMenu.Button {
             break;
         case STATE.OFFLINE:
             this._dotFilled = false;
-            this._statusItem.label.text = error
-                ? _('sing-box  ·  Unreachable')
-                : _('sing-box  ·  Offline');
+            this._statusItem.label.text = _('sing-box  ·  Unreachable');
             this._outboundLabel.text = '';
             this._speedLabel.text = '';
             this._speedItem.label.text = _('API unreachable — check URL and secret in Settings');
             this._prevSample = null;
+            this._clearMenuData();
             break;
         default:
             this._dotFilled = false;