Fit mobile searches above results sheet

src/uk_bus_stops/static/app.js

@@ -270,6 +270,7 @@ function renderStops(data, fitMap = true, sortOrigin = null, preserveSelection =
       radius: 7, color: '#0d6efd', fillColor: '#fff', fillOpacity: 1, weight: 3,
     }).bindTooltip(data.location.label).addTo(map);
   }
+  if (isMobile() && data.kind !== 'map') setPanel(true);
 
   for (const stop of stops) {
     const button = document.createElement('button');
@@ -305,14 +306,15 @@ function renderStops(data, fitMap = true, sortOrigin = null, preserveSelection =
       ? 'No transport stops were found in this map area.'
       : 'No transport stops were found within 1 km.';
     list.appendChild(empty);
-    if (fitMap && data.location) moveMap(() => map.setView([data.location.lat, data.location.lon], 16));
+    if (fitMap && data.location) {
+      moveMap(() => centrePointInVisibleMap(data.location.lat, data.location.lon, 16));
+    }
   } else if (fitMap) {
     const bounds = markers.getBounds();
     if (searchMarker) bounds.extend(searchMarker.getLatLng());
-    moveMap(() => map.fitBounds(bounds, {padding: [30, 30], maxZoom: 17}));
+    moveMap(() => map.fitBounds(bounds, visibleMapFitOptions()));
     if (data.kind === 'atco' && stops.length === 1) selectStop(stops[0]);
   }
-  if (isMobile() && data.kind !== 'map') setPanel(true);
 }
 
 /** Show UK-only Nominatim matches and wait for the user to choose one. */
@@ -410,16 +412,37 @@ function clearHoveredStop() {
   hoveredMarkerHalo = null;
 }
 
+/** Return how many map pixels are covered by the open mobile sheet. */
+function mobilePanelOverlayHeight() {
+  if (isMobile() && byId('sidebar').classList.contains('panel-open')) {
+    return Math.min(map.getSize().y, byId('sidebar').getBoundingClientRect().height);
+  }
+  return 0;
+}
+
+/** Leaflet fit options that reserve the area hidden by the mobile sheet. */
+function visibleMapFitOptions() {
+  const overlayHeight = mobilePanelOverlayHeight();
+  if (!overlayHeight) return {padding: [30, 30], maxZoom: 17};
+  return {
+    paddingTopLeft: [30, 30],
+    paddingBottomRight: [30, overlayHeight + 30],
+    maxZoom: 17,
+  };
+}
+
+/** Centre a coordinate in the portion of the map not covered by the mobile sheet. */
+function centrePointInVisibleMap(lat, lon, zoom) {
+  const point = map.project(L.latLng(lat, lon), zoom);
+  const adjustedCenter = map.unproject(
+    point.add(L.point(0, mobilePanelOverlayHeight() / 2)), zoom
+  );
+  map.setView(adjustedCenter, zoom);
+}
+
 /** Centre a selected stop in the portion of the map not covered by the mobile sheet. */
 function centreSelectedStop(stop) {
-  const zoom = Math.max(map.getZoom(), 17);
-  let verticalOffset = 0;
-  if (isMobile() && byId('sidebar').classList.contains('panel-open')) {
-    verticalOffset = Math.min(map.getSize().y, byId('sidebar').getBoundingClientRect().height) / 2;
-  }
-  const stopPoint = map.project(L.latLng(stop.lat, stop.lon), zoom);
-  const adjustedCenter = map.unproject(stopPoint.add(L.point(0, verticalOffset)), zoom);
-  map.setView(adjustedCenter, zoom);
+  centrePointInVisibleMap(stop.lat, stop.lon, Math.max(map.getZoom(), 17));
 }
 
 function osmUrl(stop, edit = false) {

tests/test_uk_bus_stops_playwright.py

@@ -278,3 +278,40 @@ def test_mobile_selected_stop_stays_above_detail_sheet(
     }""")
     assert 0 < position["markerY"] < position["visibleBottom"]
     page.close()
+
+
+def test_mobile_postcode_is_fitted_above_results_sheet(
+    chromium_browser: Any, flask_url: str
+) -> None:
+    """A unique postcode marker is fitted inside the unobscured mobile map area."""
+    page = chromium_browser.new_page(viewport={"width": 390, "height": 844})
+    page.route("**/api/search?*", lambda route: route.fulfill(json={
+        "kind": "geocode", "query": "SW1A 1AA",
+        "locations": [{
+            "lat": 51.501, "lon": -0.142, "label": "Westminster, London",
+            "type": "postcode",
+        }],
+    }))
+    page.route("**/api/stops?*", lambda route: route.fulfill(json={
+        "kind": "location",
+        "location": {"lat": 51.501, "lon": -0.142, "label": "Westminster, London"},
+        "stops": [{
+            "type": "node", "id": 999, "lat": 51.502, "lon": -0.141,
+            "name": "Nearby Stop", "atco_code": "490000001", "indicator": None,
+            "bearing": "N", "transport_type": "Bus stop",
+            "tags": {"highway": "bus_stop"},
+        }],
+    }))
+    page.goto(flask_url, wait_until="networkidle")
+    page.get_by_label("Location or ATCO code").fill("SW1A 1AA")
+    page.get_by_role("button", name="Search").click()
+    playwright_api.expect(page.locator("#stop-count")).to_have_text("1 found")
+    page.wait_for_timeout(400)
+    position = page.evaluate("""() => {
+      const point = map.latLngToContainerPoint(searchMarker.getLatLng());
+      const mapRect = document.getElementById('map').getBoundingClientRect();
+      const sheetRect = document.getElementById('sidebar').getBoundingClientRect();
+      return {markerY: point.y, visibleBottom: sheetRect.top - mapRect.top};
+    }""")
+    assert 0 < position["markerY"] < position["visibleBottom"]
+    page.close()