Set Elsewhen's here by tapping a city on the globe (#13438)

A city on this machine's zone becomes homeCity, the zone's own city clears
it, and a city on another zone leaves it alone. Ported from omacom/elsewhen#5.

Co-authored-by: Shawn Yeager <shawn@shawnyeager.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

shell/plugins/panels/elsewhen/Globe.qml

@@ -56,6 +56,7 @@ Item {
   signal offsetModeToggleRequested()
   // Only real selections: -1 means "no city" here but "home" in the list.
   signal citySelected(string label, string zone)
+  signal cityTapped(string label, string zone)
 
   // ---- data -------------------------------------------------------------
   property var land: []            // coastline rings, flat [lon,lat,...]
@@ -96,7 +97,10 @@ Item {
   function pickAt(cx, cy) {
     var hit = hitAt(cx, cy)
     selectAt(hit)
-    if (hit >= 0) flyTo(allCities[hit][2], allCities[hit][3])
+    if (hit >= 0) {
+      flyTo(allCities[hit][2], allCities[hit][3])
+      cityTapped(allCities[hit][0], allCities[hit][1])
+    }
     return hit
   }
 

shell/plugins/panels/elsewhen/Model.js

@@ -272,6 +272,18 @@ function labelForZoneId(id) {
   return String(id || "").split("/").pop().replace(/_/g, " ")
 }
 
+// Tapping a city on this machine's clock makes it "here", and the zone's own
+// city clears the choice. The new homeCity setting, or null to leave it.
+function homeCityAfterTap(label, zoneId, homeOverride, localZone) {
+  var name = String(label || "").trim()
+  var local = String(localZone || "")
+  if (name === "" || local === "" || String(zoneId || "") !== local) return null
+  var override = String(homeOverride || "").trim()
+  var zoneCity = labelForZoneId(local)
+  if (name === (override === "" ? zoneCity : override)) return null
+  return name === zoneCity ? "" : name
+}
+
 function serializeZones(zones) {
   var parts = []
   for (var i = 0; i < zones.length; i++) {
@@ -880,6 +892,7 @@ if (typeof module !== "undefined") {
     indexOfZone: indexOfZone,
     indexOfZoneKey: indexOfZoneKey,
     labelForZoneId: labelForZoneId,
+    homeCityAfterTap: homeCityAfterTap,
     serializeZones: serializeZones,
     addZone: addZone,
     removeZoneAt: removeZoneAt,

shell/plugins/panels/elsewhen/Panel.qml

@@ -118,6 +118,13 @@ Panel {
     else g.showHome()
   }
 
+  function claimHome(label, zone) {
+    var stored = Model.homeCityAfterTap(label, zone, setting("homeCity", ""), localZone)
+    if (stored === null) return
+    persistSettings({ homeCity: stored })
+    refreshFacts()
+  }
+
   function focusFromGlobe(label, zone) {
     var i = Model.indexOfZone(zones, label, zone)
     if (i >= 0) focusOn(i)
@@ -876,6 +883,7 @@ Panel {
                 item.exitRequested.connect(function() { root.setGlobeMode(false, false) })
                 item.jumpDismissed.connect(function() { Qt.callLater(function() { keyCatcher.forceActiveFocus() }) })
                 item.citySelected.connect(function(label, zone) { root.focusFromGlobe(label, zone) })
+                item.cityTapped.connect(function(label, zone) { root.claimHome(label, zone) })
                 // A cold start can finish loading after the mode switched on.
                 if (root.globeMode) root.showFocusOnGlobe()
               }