[android] Expected "Show on map" search button behaviour.

Signed-off-by: Viktor Govako <viktor.govako@gmail.com>

android/app/src/main/java/app/organicmaps/sdk/search/SearchEngine.java

@@ -190,6 +190,12 @@ public enum SearchEngine implements SearchListener, MapSearchListener,
     nativeShowResult(index);
   }
 
+  @MainThread
+  public void updateViewportWithLastResults()
+  {
+    nativeUpdateViewportWithLastResults();
+  }
+
   public void initialize()
   {
     nativeInit();
@@ -224,4 +230,6 @@ public enum SearchEngine implements SearchListener, MapSearchListener,
   private static native void nativeCancelEverywhereSearch();
 
   private static native void nativeCancelAllSearches();
+
+  private static native void nativeUpdateViewportWithLastResults();
 }

android/app/src/main/java/app/organicmaps/search/SearchFragment.java

@@ -430,6 +430,8 @@ public class SearchFragment extends BaseMwmFragment implements SearchListener, C
 
   void showAllResultsOnMap()
   {
+    SearchEngine.INSTANCE.updateViewportWithLastResults();
+
     // The previous search should be cancelled before the new one is started, since previous search
     // results are no longer needed.
     SearchEngine.INSTANCE.cancel();

android/sdk/src/main/cpp/app/organicmaps/sdk/search/SearchEngine.cpp

@@ -372,4 +372,10 @@ extern "C"
   {
     g_framework->NativeFramework()->GetSearchAPI().CancelAllSearches();
   }
+
+  JNIEXPORT void JNICALL
+  Java_app_organicmaps_sdk_search_SearchEngine_nativeUpdateViewportWithLastResults(JNIEnv * env, jclass clazz)
+  {
+    g_framework->NativeFramework()->UpdateViewport(g_results);
+  }
 } // extern "C"

map/framework.cpp

@@ -1375,67 +1375,40 @@ void Framework::ShowSearchResult(search::Result const & res, bool animation)
   SelectSearchResult(res, animation);
 }
 
-size_t Framework::ShowSearchResults(search::Results const & results)
+void Framework::UpdateViewport(search::Results const & results)
 {
-  using namespace search;
-
-  size_t count = results.GetCount();
-  if (count == 0)
-    return 0;
-
-  if (count == 1)
-  {
-    Result const & r = results[0];
-    if (!r.IsSuggest())
-      ShowSearchResult(r);
-    else
-      return 0;
-  }
-
-  FillSearchResultsMarks(true /* clear */, results);
-
   // Setup viewport according to results.
   m2::AnyRectD viewport = m_currentModelView.GlobalRect();
   m2::PointD const center = viewport.Center();
 
   double minDistance = numeric_limits<double>::max();
-  int minInd = -1;
-  for (size_t i = 0; i < count; ++i)
+  search::Result const * res = nullptr;
+  for (auto const & r : results)
   {
-    Result const & r = results[i];
     if (r.HasPoint())
     {
       double const dist = center.SquaredLength(r.GetFeatureCenter());
       if (dist < minDistance)
       {
         minDistance = dist;
-        minInd = static_cast<int>(i);
+        res = &r;
       }
     }
   }
 
-  if (minInd != -1)
+  if (res)
   {
-    m2::PointD const pt = results[minInd].GetFeatureCenter();
-
-    if (m_currentModelView.isPerspective())
-    {
-      StopLocationFollow();
-      SetViewportCenter(pt);
-      return count;
-    }
-
+    m2::PointD const pt = res->GetFeatureCenter();
     if (!viewport.IsPointInside(pt))
     {
       viewport.SetSizesToIncludePoint(pt);
+      double constexpr factor = 0.05;
+      viewport.Inflate(viewport.GetLocalRect().SizeX() * factor, viewport.GetLocalRect().SizeY() * factor);
+
       StopLocationFollow();
-    }
-  }
-
-  // Graphics engine can be recreated (on Android), so we always set up viewport here.
       ShowRect(viewport);
-
-  return count;
+    }
+  }
 }
 
 void Framework::FillSearchResultsMarks(bool clear, search::Results const & results)

map/framework.hpp

@@ -489,7 +489,7 @@ public:
   // search result.
   void ShowSearchResult(search::Result const & res, bool animation = true);
 
-  size_t ShowSearchResults(search::Results const & results);
+  void UpdateViewport(search::Results const & results);
 
   void FillSearchResultsMarks(bool clear, search::Results const & results);
   void FillSearchResultsMarks(SearchResultsIterT beg, SearchResultsIterT end, bool clear);