[search] Refactored search API.

38 files changed, 511 insertions, 355 deletions

diff --git a/android/jni/com/mapswithme/maps/Framework.cpp b/android/jni/com/mapswithme/maps/Framework.cpp
index 295a259809..cf12d836f9 100644
--- a/android/jni/com/mapswithme/maps/Framework.cpp
+++ b/android/jni/com/mapswithme/maps/Framework.cpp
@@ -7,6 +7,8 @@
 
 #include "map/user_mark.hpp"
 
+#include "search/everywhere_search_params.hpp"
+
 #include "storage/storage_helpers.hpp"
 
 #include "drape_frontend/visual_params.hpp"
@@ -307,10 +309,10 @@ void Framework::Scale(m2::PointD const & centerPt, int targetZoom, bool animate)
   return &m_work;
 }
 
-bool Framework::Search(search::SearchParams const & params)
+bool Framework::Search(search::EverywhereSearchParams const & params)
 {
   m_searchQuery = params.m_query;
-  return m_work.Search(params);
+  return m_work.SearchEverywhere(params);
 }
 
 void Framework::AddLocalMaps()
diff --git a/android/jni/com/mapswithme/maps/Framework.hpp b/android/jni/com/mapswithme/maps/Framework.hpp
index 1e4f34c3d6..a9b719a4f4 100644
--- a/android/jni/com/mapswithme/maps/Framework.hpp
+++ b/android/jni/com/mapswithme/maps/Framework.hpp
@@ -27,6 +27,11 @@
 #include "std/unique_ptr.hpp"
 #include "std/cstdint.hpp"
 
+namespace search
+{
+struct EverywhereSearchParams;
+}
+
 namespace android
 {
   class Framework
@@ -101,7 +106,7 @@ namespace android
 
     void Touch(int action, Finger const & f1, Finger const & f2, uint8_t maskedPointer);
 
-    bool Search(search::SearchParams const & params);
+    bool Search(search::EverywhereSearchParams const & params);
     string GetLastSearchQuery() { return m_searchQuery; }
     void ClearLastSearchQuery() { m_searchQuery.clear(); }
 
diff --git a/android/jni/com/mapswithme/maps/SearchEngine.cpp b/android/jni/com/mapswithme/maps/SearchEngine.cpp
index cdd70a9aa1..0c04e4e2bb 100644
--- a/android/jni/com/mapswithme/maps/SearchEngine.cpp
+++ b/android/jni/com/mapswithme/maps/SearchEngine.cpp
@@ -1,7 +1,12 @@
 #include "Framework.hpp"
 
-#include "base/thread.hpp"
+#include "search/everywhere_search_params.hpp"
+#include "search/mode.hpp"
 #include "search/result.hpp"
+#include "search/viewport_search_params.hpp"
+
+#include "base/thread.hpp"
+
 #include "std/atomic.hpp"
 #include "std/mutex.hpp"
 
@@ -183,17 +188,14 @@ extern "C"
 
   JNIEXPORT jboolean JNICALL
   Java_com_mapswithme_maps_search_SearchEngine_nativeRunSearch(JNIEnv * env, jclass clazz, jbyteArray bytes, jstring lang,
-                                                               jlong timestamp, jboolean force, jboolean hasPosition, jdouble lat, jdouble lon)
+                                                               jlong timestamp, jboolean hasPosition, jdouble lat, jdouble lon)
   {
-    search::SearchParams params;
+    search::EverywhereSearchParams params;
     params.m_query = jni::ToNativeString(env, bytes);
-    params.SetInputLocale(ReplaceDeprecatedLanguageCode(jni::ToNativeString(env, lang)));
-    params.SetForceSearch(force);
-    if (hasPosition)
-      params.SetPosition(lat, lon);
+    params.m_inputLocale = ReplaceDeprecatedLanguageCode(jni::ToNativeString(env, lang));
     params.m_onResults = bind(&OnResults, _1, timestamp, false, hasPosition, lat, lon);
 
-    bool const searchStarted = g_framework->NativeFramework()->Search(params);
+    bool const searchStarted = g_framework->NativeFramework()->SearchEverywhere(params);
     if (searchStarted)
       g_queryTimestamp = timestamp;
     return searchStarted;
@@ -203,16 +205,20 @@ extern "C"
   Java_com_mapswithme_maps_search_SearchEngine_nativeRunInteractiveSearch(JNIEnv * env, jclass clazz, jbyteArray bytes,
                                                                           jstring lang, jlong timestamp, jboolean isMapAndTable)
   {
-    search::SearchParams params;
-    params.m_query = jni::ToNativeString(env, bytes);
-    params.SetInputLocale(ReplaceDeprecatedLanguageCode(jni::ToNativeString(env, lang)));
+    search::ViewportSearchParams vparams;
+    vparams.m_query = jni::ToNativeString(env, bytes);
+    vparams.m_inputLocale = ReplaceDeprecatedLanguageCode(jni::ToNativeString(env, lang));
 
-    g_framework->NativeFramework()->StartInteractiveSearch(params);
+    g_framework->NativeFramework()->SearchInViewport(vparams);
 
     if (isMapAndTable)
     {
-      params.m_onResults = bind(&OnResults, _1, timestamp, isMapAndTable, false /* hasPosition */, 0.0, 0.0);
-      if (g_framework->NativeFramework()->Search(params))
+      search::EverywhereSearchParams eparams;
+      eparams.m_query = vparams.m_query;
+      eparams.m_inputLocale = vparams.m_inputLocale;
+      eparams.m_onResults = bind(&OnResults, _1, timestamp, isMapAndTable, false /* hasPosition */,
+                                 0.0 /* lat */, 0.0 /* lon */);
+      if (g_framework->NativeFramework()->SearchEverywhere(eparams))
         g_queryTimestamp = timestamp;
     }
   }
@@ -256,7 +262,7 @@ extern "C"
   {
     GetPlatform().RunOnGuiThread([]()
     {
-      g_framework->NativeFramework()->CancelInteractiveSearch();
+      g_framework->NativeFramework()->CancelSearch(search::Mode::Viewport);
     });
   }
 } // extern "C"
diff --git a/android/src/com/mapswithme/maps/search/SearchEngine.java b/android/src/com/mapswithme/maps/search/SearchEngine.java
index 5c73e48d1d..b235e490b8 100644
--- a/android/src/com/mapswithme/maps/search/SearchEngine.java
+++ b/android/src/com/mapswithme/maps/search/SearchEngine.java
@@ -93,14 +93,13 @@ public enum SearchEngine implements NativeSearchListener,
 
   /**
    * @param timestamp Search results are filtered according to it after multiple requests.
-   * @param force     Should be false for repeating requests with the same query.
    * @return whether search was actually started.
    */
-  public static boolean search(String query, long timestamp, boolean force, boolean hasLocation, double lat, double lon)
+  public static boolean search(String query, long timestamp, boolean hasLocation, double lat, double lon)
   {
     try
     {
-      return nativeRunSearch(query.getBytes("utf-8"), Language.getKeyboardLocale(), timestamp, force, hasLocation, lat, lon);
+      return nativeRunSearch(query.getBytes("utf-8"), Language.getKeyboardLocale(), timestamp, hasLocation, lat, lon);
     } catch (UnsupportedEncodingException ignored) { }
 
     return false;
@@ -155,7 +154,7 @@ public enum SearchEngine implements NativeSearchListener,
   /**
    * @param bytes utf-8 formatted bytes of query.
    */
-  private static native boolean nativeRunSearch(byte[] bytes, String language, long timestamp, boolean force, boolean hasLocation, double lat, double lon);
+  private static native boolean nativeRunSearch(byte[] bytes, String language, long timestamp, boolean hasLocation, double lat, double lon);
 
   /**
    * @param bytes utf-8 formatted query bytes
diff --git a/android/src/com/mapswithme/maps/search/SearchFragment.java b/android/src/com/mapswithme/maps/search/SearchFragment.java
index dbeaa8760b..ed4749b14c 100644
--- a/android/src/com/mapswithme/maps/search/SearchFragment.java
+++ b/android/src/com/mapswithme/maps/search/SearchFragment.java
@@ -412,7 +412,7 @@ public class SearchFragment extends BaseMwmFragment
     }
     else
     {
-      if (!SearchEngine.search(getQuery(), mLastQueryTimestamp, true, mLastPosition.valid, mLastPosition.lat, mLastPosition.lon))
+      if (!SearchEngine.search(getQuery(), mLastQueryTimestamp, mLastPosition.valid, mLastPosition.lat, mLastPosition.lon))
         return;
     }
 
diff --git a/android/src/com/mapswithme/maps/search/SearchResult.java b/android/src/com/mapswithme/maps/search/SearchResult.java
index 5a4f5c8077..82e0ed3d10 100644
--- a/android/src/com/mapswithme/maps/search/SearchResult.java
+++ b/android/src/com/mapswithme/maps/search/SearchResult.java
@@ -72,4 +72,4 @@ public class SearchResult
     this.description = description;
     this.highlightRanges = highlightRanges;
   }
-}
\ No newline at end of file
+}
diff --git a/iphone/Maps/Classes/Search/MWMSearch.mm b/iphone/Maps/Classes/Search/MWMSearch.mm
index a63d0baada..01a41b196b 100644
--- a/iphone/Maps/Classes/Search/MWMSearch.mm
+++ b/iphone/Maps/Classes/Search/MWMSearch.mm
@@ -5,8 +5,8 @@
 
 #include "Framework.h"
 
-#include "search/params.hpp"
 #include "search/query_saver.hpp"
+#include "search/search_params.hpp"
 
 namespace
 {
diff --git a/map/framework.cpp b/map/framework.cpp
index 099fd6f8fb..5ab3159a20 100644
--- a/map/framework.cpp
+++ b/map/framework.cpp
@@ -12,12 +12,13 @@
 #include "routing/routing_algorithm.hpp"
 
 #include "search/engine.hpp"
+#include "search/everywhere_search_params.hpp"
 #include "search/geometry_utils.hpp"
-#include "search/interactive_search_callback.hpp"
 #include "search/intermediate_result.hpp"
 #include "search/processor_factory.hpp"
 #include "search/result.hpp"
 #include "search/reverse_geocoder.hpp"
+#include "search/viewport_search_params.hpp"
 
 #include "storage/storage_helpers.hpp"
 
@@ -138,8 +139,7 @@ void ParseSetGpsTrackMinAccuracyCommand(string const & query)
 // Cancels search query by |handle|.
 void CancelQuery(weak_ptr<search::ProcessorHandle> & handle)
 {
-  auto queryHandle = handle.lock();
-  if (queryHandle)
+  if (auto queryHandle = handle.lock())
     queryHandle->Cancel();
   handle.reset();
 }
@@ -504,8 +504,7 @@ bool Framework::OnCountryFileDelete(storage::TCountryId const & countryId, stora
   if (countryId == m_lastReportedCountry)
     m_lastReportedCountry = kInvalidCountryId;
 
-  if (auto handle = m_lastProcessorHandle.lock())
-    handle->Cancel();
+  CancelAllSearches();
 
   m2::RectD rect = MercatorBounds::FullRect();
 
@@ -1045,37 +1044,6 @@ void Framework::InvalidateRect(m2::RectD const & rect)
   CallDrapeFunction(bind(&df::DrapeEngine::InvalidateRect, _1, rect));
 }
 
-void Framework::StartInteractiveSearch(search::SearchParams const & params)
-{
-  auto const originalOnResults = params.m_onResults;
-
-  auto setMode = [this]() {
-    SetDisplacementMode(DisplacementModeManager::SLOT_INTERACTIVE_SEARCH, true /* show */);
-  };
-
-  auto onResults = [this, originalOnResults](search::Results const & results) {
-    if (!results.IsEndMarker())
-    {
-      GetPlatform().RunOnGuiThread([this, results]() {
-        if (IsInteractiveSearchActive())
-          FillSearchResultsMarks(results);
-      });
-    }
-
-    if (originalOnResults)
-      originalOnResults(results);
-  };
-
-  m_lastInteractiveSearchParams = params;
-  m_lastInteractiveSearchParams.SetForceSearch(false);
-  m_lastInteractiveSearchParams.SetMode(search::Mode::Viewport);
-  m_lastInteractiveSearchParams.SetSuggestsEnabled(false);
-  m_lastInteractiveSearchParams.m_onResults =
-      search::InteractiveSearchCallback(move(setMode), move(onResults));
-
-  UpdateUserViewportChanged();
-}
-
 void Framework::ClearAllCaches()
 {
   m_model.ClearCaches();
@@ -1109,43 +1077,12 @@ void Framework::SetCurrentCountryChangedListener(TCurrentCountryChanged const &
 
 void Framework::UpdateUserViewportChanged()
 {
-  if (IsInteractiveSearchActive())
-  {
-    (void)GetCurrentPosition(m_lastInteractiveSearchParams.m_lat,
-                             m_lastInteractiveSearchParams.m_lon);
-    Search(m_lastInteractiveSearchParams);
-  }
-}
-
-bool Framework::Search(search::SearchParams const & params)
-{
-#ifdef FIXED_LOCATION
-  search::SearchParams rParams(params);
-  if (params.IsValidPosition())
-  {
-    m_fixedPos.GetLat(rParams.m_lat);
-    m_fixedPos.GetLon(rParams.m_lon);
-  }
-#else
-  search::SearchParams const & rParams = params;
-#endif
-
-  ParseSetGpsTrackMinAccuracyCommand(params.m_query);
-  if (ParseEditorDebugCommand(params))
-    return true;
-
-  m2::RectD const viewport = GetCurrentViewport();
-
-  if (QueryMayBeSkipped(rParams, viewport))
-    return false;
-
-  m_lastQueryParams = rParams;
-  m_lastQueryViewport = viewport;
+  if (!IsViewportSearchActive())
+    return;
 
-  // Cancels previous search request (if any) and initiates new search request.
-  CancelQuery(m_lastProcessorHandle);
-  m_lastProcessorHandle = m_searchEngine->Search(m_lastQueryParams, m_lastQueryViewport);
-  return true;
+  auto & params = m_searchIntents[static_cast<size_t>(search::Mode::Viewport)].m_params;
+  SetCurrentPositionIfPossible(params);
+  Search(params);
 }
 
 bool Framework::GetGroupCountryIdFromFeature(FeatureType const & ft, string & name) const
@@ -1164,25 +1101,67 @@ bool Framework::GetGroupCountryIdFromFeature(FeatureType const & ft, string & na
   return false;
 }
 
+bool Framework::SearchEverywhere(search::EverywhereSearchParams const & params)
+{
+  search::SearchParams p;
+  p.m_query = params.m_query;
+  p.SetInputLocale(params.m_inputLocale);
+  p.SetForceSearch(true);
+  p.SetMode(search::Mode::Everywhere);
+  p.SetSuggestsEnabled(true);
+  p.m_onResults = [params](search::Results const & results) {
+    if (params.m_onResults)
+      GetPlatform().RunOnGuiThread([params, results]() { params.m_onResults(results); });
+  };
+  SetCurrentPositionIfPossible(p);
+
+  return Search(p);
+}
+
+bool Framework::SearchInViewport(search::ViewportSearchParams const & params)
+{
+  search::SearchParams p;
+  p.m_query = params.m_query;
+  p.SetInputLocale(params.m_inputLocale);
+  p.SetForceSearch(false);
+  p.SetMode(search::Mode::Viewport);
+  p.SetSuggestsEnabled(false);
+
+  p.m_onStarted = [params]() {
+    if (params.m_onStarted)
+      GetPlatform().RunOnGuiThread([params]() { params.m_onStarted(); });
+  };
+
+  p.m_onResults = search::ViewportSearchCallback(
+      static_cast<search::ViewportSearchCallback::Delegate &>(*this),
+      [params](search::Results const & results) {
+        if (results.IsEndMarker() && params.m_onCompleted)
+          GetPlatform().RunOnGuiThread([params]() { params.m_onCompleted(); });
+      });
+  SetCurrentPositionIfPossible(p);
+
+  return Search(p);
+}
+
 bool Framework::SearchInDownloader(DownloaderSearchParams const & params)
 {
-  search::SearchParams searchParam;
-  searchParam.m_query = params.m_query;
-  searchParam.m_inputLocale = params.m_inputLocale;
-  searchParam.SetMode(search::Mode::World);
-  searchParam.SetSuggestsEnabled(false);
-  searchParam.SetForceSearch(true);
-  searchParam.m_onResults = [this, params](search::Results const & results)
+  search::SearchParams p;
+  p.m_query = params.m_query;
+  p.m_inputLocale = params.m_inputLocale;
+  p.SetMode(search::Mode::Downloader);
+  p.SetSuggestsEnabled(false);
+  p.SetForceSearch(true);
+  p.m_onResults = [this, params](search::Results const & results)
   {
     DownloaderSearchResults downloaderSearchResults;
-    for (auto it = results.Begin(); it != results.End(); ++it)
+    for (auto const & result : results)
     {
-      if (!it->HasPoint())
+      if (!result.HasPoint())
         continue;
 
-      if (it->GetResultType() != search::Result::RESULT_LATLON)
+      if (result.GetResultType() != search::Result::RESULT_LATLON)
       {
-        FeatureID const & fid = it->GetFeatureID();
+        FeatureID const & fid = result.GetFeatureID();
         Index::FeaturesLoaderGuard loader(m_model.GetIndex(), fid.m_mwmId);
         FeatureType ft;
         if (!loader.GetFeatureByIndex(fid.m_index, ft))
@@ -1199,25 +1178,51 @@ bool Framework::SearchInDownloader(DownloaderSearchParams const & params)
           if (GetGroupCountryIdFromFeature(ft, groupFeatureName))
           {
             downloaderSearchResults.m_results.emplace_back(groupFeatureName,
-                                                           it->GetString() /* m_matchedName */);
+                                                           result.GetString() /* m_matchedName */);
             continue;
           }
         }
       }
 
-      auto const & mercator = it->GetFeatureCenter();
+      auto const & mercator = result.GetFeatureCenter();
       TCountryId const & countryId = CountryInfoGetter().GetRegionCountryId(mercator);
       if (countryId == kInvalidCountryId)
         continue;
       downloaderSearchResults.m_results.emplace_back(countryId,
-                                                     it->GetString() /* m_matchedName */);
+                                                     result.GetString() /* m_matchedName */);
     }
     downloaderSearchResults.m_query = params.m_query;
     downloaderSearchResults.m_endMarker = results.IsEndMarker();
-    params.m_onResults(downloaderSearchResults);
+
+    if (params.m_onResults)
+    {
+      GetPlatform().RunOnGuiThread(
+          [params, downloaderSearchResults]() { params.m_onResults(downloaderSearchResults); });
+    }
   };
 
-  return Search(searchParam);
+  return Search(p);
+}
+
+void Framework::CancelSearch(search::Mode mode)
+{
+  ASSERT_NOT_EQUAL(mode, search::Mode::Count, ());
+
+  if (mode == search::Mode::Viewport)
+  {
+    ClearSearchResultsMarks();
+    SetDisplacementMode(DisplacementModeManager::SLOT_INTERACTIVE_SEARCH, false /* show */);
+  }
+
+  auto & intent = m_searchIntents[static_cast<size_t>(mode)];
+  intent.m_params.Clear();
+  CancelQuery(intent.m_handle);
+}
+
+void Framework::CancelAllSearches()
+{
+  for (size_t i = 0; i < static_cast<size_t>(search::Mode::Count); ++i)
+    CancelSearch(static_cast<search::Mode>(i));
 }
 
 void Framework::MemoryWarning()
@@ -1307,21 +1312,64 @@ string Framework::GetCountryName(m2::PointD const & pt) const
   return info.m_name;
 }
 
-bool Framework::QueryMayBeSkipped(search::SearchParams const & params,
+bool Framework::Search(search::SearchParams const & params)
+{
+  auto const mode = params.GetMode();
+  auto & intent = m_searchIntents[static_cast<size_t>(mode)];
+
+#ifdef FIXED_LOCATION
+  search::SearchParams rParams(params);
+  if (params.IsValidPosition())
+  {
+    m_fixedPos.GetLat(rParams.m_lat);
+    m_fixedPos.GetLon(rParams.m_lon);
+  }
+#else
+  search::SearchParams const & rParams = params;
+#endif
+
+  ParseSetGpsTrackMinAccuracyCommand(params.m_query);
+  if (ParseEditorDebugCommand(params))
+    return true;
+
+  m2::RectD const viewport = GetCurrentViewport();
+
+  if (QueryMayBeSkipped(intent, rParams, viewport))
+    return false;
+
+  intent.m_params = rParams;
+  intent.m_viewport = viewport;
+
+  // Cancels previous search request (if any) and initiates new search request.
+  CancelQuery(intent.m_handle);
+  intent.m_handle = m_searchEngine->Search(intent.m_params, intent.m_viewport);
+
+  return true;
+}
+
+void Framework::SetCurrentPositionIfPossible(search::SearchParams & params)
+{
+  double lat;
+  double lon;
+  if (GetCurrentPosition(lat, lon))
+    params.SetPosition(lat, lon);
+}
+
+bool Framework::QueryMayBeSkipped(SearchIntent const & intent, search::SearchParams const & params,
                                   m2::RectD const & viewport) const
 {
+  auto const & lastParams = intent.m_params;
+  auto const & lastViewport = intent.m_viewport;
+
   if (params.IsForceSearch())
     return false;
-  if (!m_lastQueryParams.IsEqualCommon(params))
+  if (!lastParams.IsEqualCommon(params))
     return false;
-  if (!m_lastQueryViewport.IsValid() ||
-      !search::IsEqualMercator(m_lastQueryViewport, viewport, kDistEqualQuery))
-  {
+  if (!lastViewport.IsValid() || !search::IsEqualMercator(lastViewport, viewport, kDistEqualQuery))
     return false;
-  }
-  if (!m_lastQueryParams.IsSearchAroundPosition() ||
-      ms::DistanceOnEarth(m_lastQueryParams.m_lat, m_lastQueryParams.m_lon, params.m_lat,
-                          params.m_lon) <= kDistEqualQuery)
+  if (!lastParams.IsSearchAroundPosition() ||
+      ms::DistanceOnEarth(lastParams.m_lat, lastParams.m_lon, params.m_lat, params.m_lon) <=
+          kDistEqualQuery)
   {
     return false;
   }
@@ -1330,7 +1378,7 @@ bool Framework::QueryMayBeSkipped(search::SearchParams const & params,
 
 void Framework::ShowSearchResult(search::Result const & res)
 {
-  CancelInteractiveSearch();
+  CancelAllSearches();
   StopLocationFollow();
 
   alohalytics::LogEvent("searchShowResult", {{"pos", strings::to_string(res.GetPositionInResults())},
@@ -1435,7 +1483,6 @@ void Framework::FillSearchResultsMarks(search::Results const & results)
   UserMarkControllerGuard guard(m_bmManager, UserMarkType::SEARCH_MARK);
   guard.m_controller.SetIsVisible(true);
   guard.m_controller.SetIsDrawable(true);
-  guard.m_controller.Clear();
 
   size_t const count = results.GetCount();
   for (size_t i = 0; i < count; ++i)
@@ -1455,15 +1502,9 @@ void Framework::FillSearchResultsMarks(search::Results const & results)
   }
 }
 
-void Framework::CancelInteractiveSearch()
+void Framework::ClearSearchResultsMarks()
 {
   UserMarkControllerGuard(m_bmManager, UserMarkType::SEARCH_MARK).m_controller.Clear();
-  if (IsInteractiveSearchActive())
-  {
-    m_lastInteractiveSearchParams.Clear();
-    SetDisplacementMode(DisplacementModeManager::SLOT_INTERACTIVE_SEARCH, false /* show */);
-    CancelQuery(m_lastProcessorHandle);
-  }
 }
 
 bool Framework::GetDistanceAndAzimut(m2::PointD const & point,
diff --git a/map/framework.hpp b/map/framework.hpp
index 4c84508a66..a0f823778a 100644
--- a/map/framework.hpp
+++ b/map/framework.hpp
@@ -25,7 +25,9 @@
 #include "editor/user_stats.hpp"
 
 #include "search/engine.hpp"
+#include "search/mode.hpp"
 #include "search/query_saver.hpp"
+#include "search/viewport_search_callback.hpp"
 
 #include "storage/downloader_search_params.hpp"
 #include "storage/downloading_policy.hpp"
@@ -33,6 +35,7 @@
 
 #include "platform/country_defines.hpp"
 #include "platform/location.hpp"
+#include "platform/platform.hpp"
 
 #include "routing/router.hpp"
 #include "routing/routing_session.hpp"
@@ -58,9 +61,11 @@ class EditableMapObject;
 
 namespace search
 {
-  class Result;
-  class Results;
-  struct AddressInfo;
+class Result;
+class Results;
+struct AddressInfo;
+struct EverywhereSearchParams;
+struct ViewportSearchParams;
 }
 
 namespace storage
@@ -82,7 +87,7 @@ namespace df
 /// build version for screenshots.
 //#define FIXED_LOCATION
 
-class Framework
+class Framework : public search::ViewportSearchCallback::Delegate
 {
   DISALLOW_COPY(Framework);
 
@@ -271,6 +276,27 @@ public:
   BookmarkAndCategory FindBookmark(UserMark const * mark) const;
   BookmarkManager & GetBookmarkManager() { return m_bmManager; }
 
+protected:
+  // search::ViewportSearchCallback::Delegate overrides:
+  void RunUITask(function<void()> fn) override { GetPlatform().RunOnGuiThread(move(fn)); }
+
+  void SetHotelDisplacementMode() override
+  {
+    SetDisplacementMode(DisplacementModeManager::SLOT_INTERACTIVE_SEARCH, true /* show */);
+  }
+
+  bool IsViewportSearchActive() const override
+  {
+    return !m_searchIntents[static_cast<size_t>(search::Mode::Viewport)].m_params.m_query.empty();
+  }
+
+  void ShowViewportSearchResults(search::Results const & results) override
+  {
+    FillSearchResultsMarks(results);
+  }
+
+  void ClearViewportSearchResults() override { ClearSearchResultsMarks(); }
+
 private:
   void ActivateMapSelection(bool needAnimation,
                             df::SelectionShape::ESelectedObject selectionType,
@@ -386,37 +412,44 @@ public:
   void SetDisplacementMode(DisplacementModeManager::Slot slot, bool show);
 
 private:
+  struct SearchIntent
+  {
+    search::SearchParams m_params;
+    weak_ptr<search::ProcessorHandle> m_handle;
+    m2::RectD m_viewport;
+  };
+
   void InitCountryInfoGetter();
   void InitSearchEngine();
 
   DisplacementModeManager m_displacementModeManager;
 
-  // Last search query params for the interactive search.
-  search::SearchParams m_lastInteractiveSearchParams;
-
   bool m_connectToGpsTrack; // need to connect to tracker when Drape is being constructed
 
+  void Search(SearchIntent const & intent);
+
+  void SetCurrentPositionIfPossible(search::SearchParams & params);
+
   void FillSearchResultsMarks(search::Results const & results);
 
+  void ClearSearchResultsMarks();
+
   void OnUpdateCurrentCountry(m2::PointF const & pt, int zoomLevel);
 
   storage::TCountryId m_lastReportedCountry;
   TCurrentCountryChanged m_currentCountryChanged;
 
-  // Search query params and viewport for the latest search
-  // query. These fields are used to check whether a new search query
-  // can be skipped. Note that these fields are not guarded by a mutex
-  // because we're assuming that they will be accessed only from the
-  // UI thread.
-  search::SearchParams m_lastQueryParams;
-  m2::RectD m_lastQueryViewport;
+  // Descriptions of last search queries for different modes. May be
+  // used for search requests skipping. This field is not guarded
+  // because it must be used from the UI thread only.
+  SearchIntent m_searchIntents[static_cast<size_t>(search::Mode::Count)];
 
-  // A handle for the latest search processor.
-  weak_ptr<search::ProcessorHandle> m_lastProcessorHandle;
+  bool Search(search::SearchParams const & params);
 
   // Returns true when |params| and |viewport| are almost the same as
-  // the latest search query's params and viewport.
-  bool QueryMayBeSkipped(search::SearchParams const & params, m2::RectD const & viewport) const;
+  // the latest search query's params and viewport in the |intent|.
+  bool QueryMayBeSkipped(SearchIntent const & intent, search::SearchParams const & params,
+                         m2::RectD const & viewport) const;
 
   void OnUpdateGpsTrackPointsCallback(vector<pair<size_t, location::GpsTrackInfo>> && toAdd,
                                       pair<size_t, size_t> const & toRemove);
@@ -427,21 +460,23 @@ public:
 
   void UpdateUserViewportChanged();
 
-  /// Call this function before entering search GUI.
-  /// While it's loading, we can cache features in viewport.
-  bool Search(search::SearchParams const & params);
-  /// Searches for mwm based on |params|.
-  /// Calling |params::m_onResults| for returning the result.
+  /// Search everywhere.
+  bool SearchEverywhere(search::EverywhereSearchParams const & params);
+
+  /// Search in the viewport.
+  bool SearchInViewport(search::ViewportSearchParams const & params);
+
+  /// Search for maps by countries or cities.
   bool SearchInDownloader(storage::DownloaderSearchParams const & params);
+
+  void CancelSearch(search::Mode mode);
+  void CancelAllSearches();
+
   bool GetCurrentPosition(double & lat, double & lon) const;
 
   void ShowSearchResult(search::Result const & res);
   size_t ShowSearchResults(search::Results const & results);
 
-  void StartInteractiveSearch(search::SearchParams const & params);
-  bool IsInteractiveSearchActive() const { return !m_lastInteractiveSearchParams.m_query.empty(); }
-  void CancelInteractiveSearch();
-
   list<TSearchRequest> const & GetLastSearchQueries() const { return m_searchQuerySaver.Get(); }
   void SaveSearchQuery(TSearchRequest const & query) { m_searchQuerySaver.Add(query); }
   void ClearSearchHistory() { m_searchQuerySaver.Clear(); }
diff --git a/qt/draw_widget.cpp b/qt/draw_widget.cpp
index ba54ad127b..16a8c45380 100644
--- a/qt/draw_widget.cpp
+++ b/qt/draw_widget.cpp
@@ -458,13 +458,9 @@ void DrawWidget::wheelEvent(QWheelEvent * e)
   m_framework->Scale(exp(e->delta() / 360.0), m2::PointD(L2D(e->x()), L2D(e->y())), false);
 }
 
-bool DrawWidget::Search(search::SearchParams params)
+bool DrawWidget::Search(search::EverywhereSearchParams const & params)
 {
-  double lat, lon;
-  if (m_framework->GetCurrentPosition(lat, lon))
-    params.SetPosition(lat, lon);
-
-  return m_framework->Search(params);
+  return m_framework->SearchEverywhere(params);
 }
 
 string DrawWidget::GetDistance(search::Result const & res) const
diff --git a/qt/draw_widget.hpp b/qt/draw_widget.hpp
index 4125ffed22..ec69452f20 100644
--- a/qt/draw_widget.hpp
+++ b/qt/draw_widget.hpp
@@ -4,13 +4,15 @@
 
 #include "map/framework.hpp"
 
+#include "search/everywhere_search_params.hpp"
+
 #include "drape_frontend/gui/skin.hpp"
 
 #include "drape_frontend/drape_engine.hpp"
 
-#include "std/unique_ptr.hpp"
-#include "std/mutex.hpp"
 #include "std/condition_variable.hpp"
+#include "std/mutex.hpp"
+#include "std/unique_ptr.hpp"
 
 #include <QtWidgets/QOpenGLWidget>
 
@@ -52,7 +54,7 @@ namespace qt
 
     void SetScaleControl(QScaleSlider * pScale);
 
-    bool Search(search::SearchParams params);
+    bool Search(search::EverywhereSearchParams const & params);
     string GetDistance(search::Result const & res) const;
     void ShowSearchResult(search::Result const & res);
 
diff --git a/qt/search_panel.cpp b/qt/search_panel.cpp
index 65095e57b1..6cf1654c12 100644
--- a/qt/search_panel.cpp
+++ b/qt/search_panel.cpp
@@ -117,10 +117,8 @@ void SearchPanel::OnSearchResult(ResultsT * results)
   {
     ClearResults();
 
-    for (ResultsT::IterT i = results->Begin(); i != results->End(); ++i)
+    for (auto const & res : *results)
     {
-      ResultT const & res = *i;
-
       QString const name = QString::fromStdString(res.GetString());
       QString strHigh;
       int pos = 0;
@@ -298,7 +296,7 @@ void SearchPanel::OnSearchTextChanged(QString const & str)
   {
     ClearResults();
 
-    m_pDrawWidget->GetFramework().CancelInteractiveSearch();
+    m_pDrawWidget->GetFramework().CancelSearch(search::Mode::Everywhere);
 
     // hide X button
     m_pClearButton->setVisible(false);
@@ -324,7 +322,7 @@ void SearchPanel::OnSearchPanelItemClicked(int row, int)
 
 void SearchPanel::hideEvent(QHideEvent *)
 {
-  m_pDrawWidget->GetFramework().CancelInteractiveSearch();
+  m_pDrawWidget->GetFramework().CancelSearch(search::Mode::Everywhere);
 }
 
 void SearchPanel::OnAnimationTimer()
diff --git a/qt/search_panel.hpp b/qt/search_panel.hpp
index d1ff5ad1bc..1d253481fb 100644
--- a/qt/search_panel.hpp
+++ b/qt/search_panel.hpp
@@ -1,7 +1,7 @@
 #pragma once
 
 #include "search/result.hpp"
-#include "search/params.hpp"
+#include "search/everywhere_search_params.hpp"
 
 #include "std/vector.hpp"
 
@@ -37,7 +37,7 @@ class SearchPanel : public QWidget
   typedef search::Result ResultT;
   vector<ResultT> m_results;
 
-  search::SearchParams m_params;
+  search::EverywhereSearchParams m_params;
 
   Q_OBJECT
 
diff --git a/search/engine.cpp b/search/engine.cpp
index 97b63a2ea2..0f8c129a77 100644
--- a/search/engine.cpp
+++ b/search/engine.cpp
@@ -1,8 +1,8 @@
 #include "search/engine.hpp"
 
 #include "search/geometry_utils.hpp"
-#include "search/params.hpp"
 #include "search/processor.hpp"
+#include "search/search_params.hpp"
 
 #include "storage/country_info_getter.hpp"
 
diff --git a/search/engine.hpp b/search/engine.hpp
index 4760d9ba68..d46faa5a7e 100644
--- a/search/engine.hpp
+++ b/search/engine.hpp
@@ -1,9 +1,9 @@
 #pragma once
 
-#include "params.hpp"
-#include "processor_factory.hpp"
-#include "result.hpp"
-#include "suggest.hpp"
+#include "search/processor_factory.hpp"
+#include "search/result.hpp"
+#include "search/search_params.hpp"
+#include "search/suggest.hpp"
 
 #include "indexer/categories_holder.hpp"
 
diff --git a/search/everywhere_search_params.hpp b/search/everywhere_search_params.hpp
new file mode 100644
index 0000000000..f3df639644
--- /dev/null
+++ b/search/everywhere_search_params.hpp
@@ -0,0 +1,16 @@
+#pragma once
+
+#include "search/search_params.hpp"
+
+#include "std/string.hpp"
+
+namespace search
+{
+struct EverywhereSearchParams
+{
+  string m_query;
+  string m_inputLocale;
+
+  SearchParams::TOnResults m_onResults;
+};
+}  // namespace search
diff --git a/search/geocoder.cpp b/search/geocoder.cpp
index 8ff1add25c..cea3c3f4f9 100644
--- a/search/geocoder.cpp
+++ b/search/geocoder.cpp
@@ -411,6 +411,7 @@ void UniteCBVs(vector<CBV> & cbvs)
 
 // Geocoder::Params --------------------------------------------------------------------------------
 Geocoder::Params::Params() : m_mode(Mode::Everywhere) {}
+
 // Geocoder::Geocoder ------------------------------------------------------------------------------
 Geocoder::Geocoder(Index const & index, storage::CountryInfoGetter const & infoGetter,
                    PreRanker & preRanker, my::Cancellable const & cancellable)
@@ -850,7 +851,7 @@ void Geocoder::ForEachCountry(vector<shared_ptr<MwmInfo>> const & infos, TFn &&
     auto const & info = infos[i];
     if (info->GetType() != MwmInfo::COUNTRY && info->GetType() != MwmInfo::WORLD)
       continue;
-    if (info->GetType() == MwmInfo::COUNTRY && m_params.m_mode == Mode::World)
+    if (info->GetType() == MwmInfo::COUNTRY && m_params.m_mode == Mode::Downloader)
       continue;
 
     auto handle = m_index.GetMwmHandleById(MwmSet::MwmId(info));
diff --git a/search/interactive_search_callback.cpp b/search/interactive_search_callback.cpp
deleted file mode 100644
index d7981bab4d..0000000000
--- a/search/interactive_search_callback.cpp
+++ /dev/null
@@ -1,25 +0,0 @@
-#include "search/interactive_search_callback.hpp"
-
-#include "search/result.hpp"
-
-namespace search
-{
-InteractiveSearchCallback::InteractiveSearchCallback(TSetDisplacementMode && setMode,
-                                                     TOnResults && onResults)
-  : m_setMode(move(setMode)), m_onResults(move(onResults)), m_hotelsModeSet(false)
-{
-}
-
-void InteractiveSearchCallback::operator()(search::Results const & results)
-{
-  m_hotelsClassif.AddBatch(results);
-
-  if (!m_hotelsModeSet && m_hotelsClassif.IsHotelQuery())
-  {
-    m_setMode();
-    m_hotelsModeSet = true;
-  }
-
-  m_onResults(results);
-}
-}  // namespace search
diff --git a/search/interactive_search_callback.hpp b/search/interactive_search_callback.hpp
deleted file mode 100644
index 8d42f537a0..0000000000
--- a/search/interactive_search_callback.hpp
+++ /dev/null
@@ -1,32 +0,0 @@
-#pragma once
-
-#include "search/hotels_classifier.hpp"
-#include "search/params.hpp"
-
-#include "std/function.hpp"
-
-namespace search
-{
-class Results;
-
-// An on-results-callback that should be used for interactive search.
-//
-// *NOTE* the class is NOT thread safe.
-class InteractiveSearchCallback
-{
-public:
-  using TSetDisplacementMode = function<void()>;
-  using TOnResults = search::TOnResults;
-
-  InteractiveSearchCallback(TSetDisplacementMode && setMode, TOnResults && onResults);
-
-  void operator()(search::Results const & results);
-
-private:
-  TSetDisplacementMode m_setMode;
-  TOnResults m_onResults;
-
-  search::HotelsClassifier m_hotelsClassif;
-  bool m_hotelsModeSet;
-};
-}  // namespace search
diff --git a/search/mode.cpp b/search/mode.cpp
index 59c7eb751b..bd2bdc8c81 100644
--- a/search/mode.cpp
+++ b/search/mode.cpp
@@ -6,9 +6,10 @@ string DebugPrint(Mode mode)
 {
   switch (mode)
   {
-  case Mode::Viewport: return "Viewport";
   case Mode::Everywhere: return "Everywhere";
-  case Mode::World: return "World";
+  case Mode::Viewport: return "Viewport";
+  case Mode::Downloader: return "Downloader";
+  case Mode::Count: return "Count";
   }
   return "Unknown";
 }
diff --git a/search/mode.hpp b/search/mode.hpp
index 0b3b00cfbe..d5e6dabf10 100644
--- a/search/mode.hpp
+++ b/search/mode.hpp
@@ -6,9 +6,10 @@ namespace search
 {
 enum class Mode
 {
-  Viewport,
   Everywhere,
-  World
+  Viewport,
+  Downloader,
+  Count
 };
 
 string DebugPrint(Mode mode);
diff --git a/search/params.hpp b/search/params.hpp
deleted file mode 100644
index 0c688a1e3b..0000000000
--- a/search/params.hpp
+++ /dev/null
@@ -1,70 +0,0 @@
-#pragma once
-
-#include "search/mode.hpp"
-
-#include "geometry/point2d.hpp"
-#include "geometry/rect2d.hpp"
-
-#include "std/function.hpp"
-#include "std/string.hpp"
-
-
-namespace search
-{
-  class Results;
-
-  using TOnStarted = function<void()>;
-  using TOnResults = function<void (Results const &)>;
-
-  class SearchParams
-  {
-  public:
-    SearchParams();
-
-    /// @name Force run search without comparing with previous search params.
-    //@{
-    void SetForceSearch(bool b) { m_forceSearch = b; }
-    bool IsForceSearch() const { return m_forceSearch; }
-    //@}
-
-    inline void SetMode(Mode mode) { m_mode = mode; }
-    inline Mode GetMode() const { return m_mode; }
-
-    void SetPosition(double lat, double lon);
-    inline bool IsValidPosition() const { return m_validPos; }
-    inline bool IsSearchAroundPosition() const
-    {
-      return (m_searchRadiusM > 0 && IsValidPosition());
-    }
-
-    inline void SetSearchRadiusMeters(double radiusM) { m_searchRadiusM = radiusM; }
-    bool GetSearchRect(m2::RectD & rect) const;
-
-    /// @param[in] locale can be "fr", "en-US", "ru_RU" etc.
-    inline void SetInputLocale(string const & locale) { m_inputLocale = locale; }
-
-    inline void SetSuggestsEnabled(bool enabled) { m_suggestsEnabled = enabled; }
-    inline bool GetSuggestsEnabled() const { return m_suggestsEnabled; }
-
-    bool IsEqualCommon(SearchParams const & rhs) const;
-
-    inline void Clear() { m_query.clear(); }
-
-    TOnStarted m_onStarted;
-    TOnResults m_onResults;
-
-    string m_query;
-    string m_inputLocale;
-
-    double m_lat, m_lon;
-
-    friend string DebugPrint(SearchParams const & params);
-
-  private:
-    double m_searchRadiusM;
-    Mode m_mode;
-    bool m_forceSearch;
-    bool m_validPos;
-    bool m_suggestsEnabled;
-  };
-} // namespace search
diff --git a/search/processor.hpp b/search/processor.hpp
index ddc340556e..d28c43c4ab 100644
--- a/search/processor.hpp
+++ b/search/processor.hpp
@@ -1,10 +1,10 @@
 #pragma once
 #include "search/geocoder.hpp"
 #include "search/mode.hpp"
-#include "search/params.hpp"
 #include "search/pre_ranker.hpp"
-#include "search/ranker.hpp"
 #include "search/rank_table_cache.hpp"
+#include "search/ranker.hpp"
+#include "search/search_params.hpp"
 #include "search/search_trie.hpp"
 #include "search/suggest.hpp"
 #include "search/token_slice.hpp"
@@ -84,7 +84,7 @@ public:
   inline void SetMode(Mode mode) { m_mode = mode; }
   inline void SetSuggestsEnabled(bool enabled) { m_suggestsEnabled = enabled; }
   inline void SetPosition(m2::PointD const & position) { m_position = position; }
-  inline void SetOnResults(TOnResults const & onResults) { m_onResults = onResults; }
+  inline void SetOnResults(SearchParams::TOnResults const & onResults) { m_onResults = onResults; }
   inline string const & GetPivotRegion() const { return m_region; }
   inline m2::PointD const & GetPosition() const { return m_position; }
 
@@ -152,7 +152,7 @@ protected:
   m2::PointD m_position;
   Mode m_mode;
   bool m_suggestsEnabled;
-  TOnResults m_onResults;
+  SearchParams::TOnResults m_onResults;
 
   /// @name Get ranking params.
   //@{
diff --git a/search/processor_factory.hpp b/search/processor_factory.hpp
index 4eeb8cec74..b8946f6d23 100644
--- a/search/processor_factory.hpp
+++ b/search/processor_factory.hpp
@@ -1,7 +1,7 @@
 #pragma once
 
-#include "search/params.hpp"
 #include "search/processor.hpp"
+#include "search/search_params.hpp"
 #include "search/suggest.hpp"
 
 #include "std/unique_ptr.hpp"
diff --git a/search/ranker.hpp b/search/ranker.hpp
index fbea55b50c..9f81147177 100644
--- a/search/ranker.hpp
+++ b/search/ranker.hpp
@@ -6,9 +6,9 @@
 #include "search/keyword_lang_matcher.hpp"
 #include "search/locality_finder.hpp"
 #include "search/mode.hpp"
-#include "search/params.hpp"
 #include "search/result.hpp"
 #include "search/reverse_geocoder.hpp"
+#include "search/search_params.hpp"
 #include "search/suggest.hpp"
 
 #include "indexer/categories_holder.hpp"
@@ -62,7 +62,7 @@ public:
     TLocales m_categoryLocales;
 
     size_t m_limit = 0;
-    TOnResults m_onResults;
+    SearchParams::TOnResults m_onResults;
   };
 
   static size_t const kBatchSize;
diff --git a/search/result.cpp b/search/result.cpp
index 0fad1be9e5..6a9a00f3cc 100644
--- a/search/result.cpp
+++ b/search/result.cpp
@@ -319,10 +319,10 @@ string DebugPrint(AddressInfo const & info)
   return info.FormatNameAndAddress();
 }
 
-string DebugPrint(Result const & r)
+string DebugPrint(Result const & result)
 {
-  return "Result { Name: " + r.GetString() + "; Type: " + r.GetFeatureType() +
-         "; Info: " + DebugPrint(r.GetRankingInfo()) + " }";
+  return "Result { Name: " + result.GetString() + "; Type: " + result.GetFeatureType() +
+         "; Info: " + DebugPrint(result.GetRankingInfo()) + " }";
 }
 
 }  // namespace search
diff --git a/search/result.hpp b/search/result.hpp
index e541c9b1f4..916d28726d 100644
--- a/search/result.hpp
+++ b/search/result.hpp
@@ -15,7 +15,6 @@
 
 namespace search
 {
-
 // Search result. Search returns a list of them, ordered by score.
 class Result
 {
@@ -152,14 +151,14 @@ class Results
 public:
   Results() : m_status(NONE) {}
 
-  /// @name To implement end of search notification.
-  //@{
   static Results GetEndMarker(bool isCancelled) { return Results(isCancelled); }
+
   bool IsEndMarker() const { return (m_status != NONE); }
   bool IsEndedNormal() const { return (m_status == ENDED); }
-  //@}
+  bool IsEndedCancelled() const { return m_status == ENDED_CANCELLED; }
 
   bool AddResult(Result && res);
+
   /// Fast function that don't do any duplicates checks.
   /// Used in viewport search only.
   void AddResultNoChecks(Result && res)
@@ -172,8 +171,6 @@ public:
   inline void Clear() { m_vec.clear(); }
 
   typedef vector<Result>::const_iterator IterT;
-  inline IterT Begin() const { return m_vec.begin(); }
-  inline IterT End() const { return m_vec.end(); }
 
   inline IterT begin() const { return m_vec.begin(); }
   inline IterT end() const { return m_vec.end(); }
@@ -221,11 +218,10 @@ struct AddressInfo
   // Caroline, 7 vulica Frunze, Minsk, Belarus
   string FormatNameAndAddress(AddressType type = DEFAULT) const;
 
-  friend string DebugPrint(AddressInfo const & info);
-
   void Clear();
-};
 
-string DebugPrint(search::Result const &);
+  friend string DebugPrint(AddressInfo const & info);
+};
 
+string DebugPrint(search::Result const & result);
 }  // namespace search
diff --git a/search/search.pro b/search/search.pro
index 3f50c1dadf..6827455004 100644
--- a/search/search.pro
+++ b/search/search.pro
@@ -16,6 +16,7 @@ HEADERS += \
     common.hpp \
     dummy_rank_table.hpp \
     engine.hpp \
+    everywhere_search_params.hpp \
     feature_offset_match.hpp \
     features_filter.hpp \
     features_layer.hpp \
@@ -29,7 +30,6 @@ HEADERS += \
     house_detector.hpp \
     house_numbers_matcher.hpp \
     house_to_street_table.hpp \
-    interactive_search_callback.hpp \
     intermediate_result.hpp \
     intersection_result.hpp \
     interval_set.hpp \
@@ -44,7 +44,6 @@ HEADERS += \
     model.hpp \
     mwm_context.hpp \
     nested_rects_cache.hpp \
-    params.hpp \
     pre_ranker.hpp \
     pre_ranking_info.hpp \
     processor.hpp \
@@ -61,6 +60,7 @@ HEADERS += \
     retrieval.hpp \
     reverse_geocoder.hpp \
     search_index_values.hpp \
+    search_params.hpp \
     search_trie.hpp \
     stats_cache.hpp \
     street_vicinity_loader.hpp \
@@ -70,6 +70,8 @@ HEADERS += \
     token_slice.hpp \
     types_skipper.hpp \
     utils.hpp \
+    viewport_search_callback.hpp \
+    viewport_search_params.hpp
 
 SOURCES += \
     approximate_string_match.cpp \
@@ -88,7 +90,6 @@ SOURCES += \
     house_detector.cpp \
     house_numbers_matcher.cpp \
     house_to_street_table.cpp \
-    interactive_search_callback.cpp \
     intermediate_result.cpp \
     intersection_result.cpp \
     keyword_lang_matcher.cpp \
@@ -102,7 +103,6 @@ SOURCES += \
     model.cpp \
     mwm_context.cpp \
     nested_rects_cache.cpp \
-    params.cpp \
     pre_ranker.cpp \
     pre_ranking_info.cpp \
     processor.cpp \
@@ -117,7 +117,9 @@ SOURCES += \
     result.cpp \
     retrieval.cpp \
     reverse_geocoder.cpp \
+    search_params.cpp \
     street_vicinity_loader.cpp \
     streets_matcher.cpp \
     token_slice.cpp \
     types_skipper.cpp \
+    viewport_search_callback.cpp
diff --git a/search/search_integration_tests/interactive_search_test.cpp b/search/search_integration_tests/interactive_search_test.cpp
index d7b28ac138..f344973861 100644
--- a/search/search_integration_tests/interactive_search_test.cpp
+++ b/search/search_integration_tests/interactive_search_test.cpp
@@ -2,7 +2,7 @@
 
 #include "generator/generator_tests_support/test_feature.hpp"
 
-#include "search/interactive_search_callback.hpp"
+#include "search/viewport_search_callback.hpp"
 #include "search/mode.hpp"
 #include "search/search_integration_tests/helpers.hpp"
 #include "search/search_tests_support/test_results_matching.hpp"
@@ -37,16 +37,33 @@ public:
   }
 };
 
-class InteractiveSearchRequest : public TestSearchRequest
+class TestDelegate : public ViewportSearchCallback::Delegate
+{
+public:
+  TestDelegate(bool & mode) : m_mode(mode) {}
+
+  // ViewportSearchCallback::Delegate overrides:
+  void RunUITask(function<void()> /* fn */) override {}
+  void SetHotelDisplacementMode() override { m_mode = true; }
+  bool IsViewportSearchActive() const override { return true; }
+  void ShowViewportSearchResults(Results const & /* results */) override {}
+  void ClearViewportSearchResults() override {}
+
+ private:
+  bool & m_mode;
+};
+
+class InteractiveSearchRequest : public TestDelegate, public TestSearchRequest
 {
 public:
   InteractiveSearchRequest(TestSearchEngine & engine, string const & query,
                            m2::RectD const & viewport, bool & mode)
-    : TestSearchRequest(
+    : TestDelegate(mode)
+    , TestSearchRequest(
           engine, query, "en" /* locale */, Mode::Viewport, viewport,
           bind(&InteractiveSearchRequest::OnStarted, this),
-          InteractiveSearchCallback([&mode]() { mode = true; },
-                                    bind(&InteractiveSearchRequest::OnResults, this, _1)))
+          ViewportSearchCallback(static_cast<ViewportSearchCallback::Delegate &>(*this),
+                                 bind(&InteractiveSearchRequest::OnResults, this, _1)))
   {
   }
 };
diff --git a/search/search_integration_tests/processor_test.cpp b/search/search_integration_tests/processor_test.cpp
index 93d979cfa0..1797aa81bc 100644
--- a/search/search_integration_tests/processor_test.cpp
+++ b/search/search_integration_tests/processor_test.cpp
@@ -267,7 +267,7 @@ UNIT_CLASS_TEST(ProcessorTest, SearchByName)
   SetViewport(m2::RectD(m2::PointD(0.5, 0.5), m2::PointD(1.5, 1.5)));
   {
     TRules rules = {ExactMatch(worldId, london)};
-    TEST(ResultsMatch("london", Mode::World, rules), ());
+    TEST(ResultsMatch("london", Mode::Downloader, rules), ());
   }
   {
     TRules rules = {ExactMatch(worldId, london), ExactMatch(wonderlandId, cafe)};
@@ -291,7 +291,7 @@ UNIT_CLASS_TEST(ProcessorTest, DisableSuggests)
     SearchParams params;
     params.m_query = "londo";
     params.m_inputLocale = "en";
-    params.SetMode(Mode::World);
+    params.SetMode(Mode::Downloader);
     params.SetSuggestsEnabled(false);
 
     TestSearchRequest request(m_engine, params, m_viewport);
diff --git a/search/params.cpp b/search/search_params.cpp
index fa47eb86c7..aa8d490dd9 100644
--- a/search/params.cpp
+++ b/search/search_params.cpp
@@ -1,10 +1,9 @@
-#include "params.hpp"
+#include "search/search_params.hpp"
 
 #include "geometry/mercator.hpp"
 
 #include "coding/multilang_utf8_string.hpp"
 
-
 namespace search
 {
 SearchParams::SearchParams()
@@ -37,10 +36,8 @@ bool SearchParams::GetSearchRect(m2::RectD & rect) const
 
 bool SearchParams::IsEqualCommon(SearchParams const & rhs) const
 {
-  return (m_query == rhs.m_query &&
-          m_inputLocale == rhs.m_inputLocale &&
-          m_validPos == rhs.m_validPos &&
-          m_mode == rhs.m_mode &&
+  return (m_query == rhs.m_query && m_inputLocale == rhs.m_inputLocale &&
+          m_validPos == rhs.m_validPos && m_mode == rhs.m_mode &&
           m_searchRadiusM == rhs.m_searchRadiusM);
 }
 
@@ -51,4 +48,4 @@ string DebugPrint(SearchParams const & params)
      << ", Mode = " << DebugPrint(params.m_mode) << " }";
   return ss.str();
 }
-} // namespace search
+}  // namespace search
diff --git a/search/search_params.hpp b/search/search_params.hpp
new file mode 100644
index 0000000000..d3de882ee9
--- /dev/null
+++ b/search/search_params.hpp
@@ -0,0 +1,61 @@
+#pragma once
+
+#include "search/mode.hpp"
+
+#include "geometry/point2d.hpp"
+#include "geometry/rect2d.hpp"
+
+#include "std/function.hpp"
+#include "std/string.hpp"
+
+namespace search
+{
+class Results;
+
+class SearchParams
+{
+public:
+  using TOnStarted = function<void()>;
+  using TOnResults = function<void(Results const &)>;
+
+  SearchParams();
+
+  /// @name Force run search without comparing with previous search params.
+  //@{
+  void SetForceSearch(bool b) { m_forceSearch = b; }
+  bool IsForceSearch() const { return m_forceSearch; }
+  //@}
+
+  inline void SetMode(Mode mode) { m_mode = mode; }
+  inline Mode GetMode() const { return m_mode; }
+  void SetPosition(double lat, double lon);
+  inline bool IsValidPosition() const { return m_validPos; }
+  inline bool IsSearchAroundPosition() const { return (m_searchRadiusM > 0 && IsValidPosition()); }
+  inline void SetSearchRadiusMeters(double radiusM) { m_searchRadiusM = radiusM; }
+  bool GetSearchRect(m2::RectD & rect) const;
+
+  /// @param[in] locale can be "fr", "en-US", "ru_RU" etc.
+  inline void SetInputLocale(string const & locale) { m_inputLocale = locale; }
+  inline void SetSuggestsEnabled(bool enabled) { m_suggestsEnabled = enabled; }
+  inline bool GetSuggestsEnabled() const { return m_suggestsEnabled; }
+  bool IsEqualCommon(SearchParams const & rhs) const;
+
+  inline void Clear() { m_query.clear(); }
+  TOnStarted m_onStarted;
+  TOnResults m_onResults;
+
+  string m_query;
+  string m_inputLocale;
+
+  double m_lat, m_lon;
+
+  friend string DebugPrint(SearchParams const & params);
+
+private:
+  double m_searchRadiusM;
+  Mode m_mode;
+  bool m_forceSearch;
+  bool m_validPos;
+  bool m_suggestsEnabled;
+};
+}  // namespace search
diff --git a/search/search_quality/search_quality_tool/search_quality_tool.cpp b/search/search_quality/search_quality_tool/search_quality_tool.cpp
index 19b06c93e6..5be0d527ea 100644
--- a/search/search_quality/search_quality_tool/search_quality_tool.cpp
+++ b/search/search_quality/search_quality_tool/search_quality_tool.cpp
@@ -1,4 +1,4 @@
-#include "search/params.hpp"
+#include "search/search_params.hpp"
 
 #include "indexer/classificator_loader.hpp"
 #include "indexer/data_header.hpp"
diff --git a/search/search_tests_support/test_search_request.cpp b/search/search_tests_support/test_search_request.cpp
index 1c7f50d3ac..fc0b99c90c 100644
--- a/search/search_tests_support/test_search_request.cpp
+++ b/search/search_tests_support/test_search_request.cpp
@@ -31,7 +31,8 @@ TestSearchRequest::TestSearchRequest(TestSearchEngine & engine, SearchParams par
 
 TestSearchRequest::TestSearchRequest(TestSearchEngine & engine, string const & query,
                                      string const & locale, Mode mode, m2::RectD const & viewport,
-                                     TOnStarted onStarted, TOnResults onResults)
+                                     SearchParams::TOnStarted onStarted,
+                                     SearchParams::TOnResults onResults)
 {
   SearchParams params;
   params.m_query = query;
@@ -88,7 +89,7 @@ void TestSearchRequest::OnResults(search::Results const & results)
   }
   else
   {
-    m_results.assign(results.Begin(), results.End());
+    m_results.assign(results.begin(), results.end());
   }
 }
 }  // namespace tests_support
diff --git a/search/search_tests_support/test_search_request.hpp b/search/search_tests_support/test_search_request.hpp
index 4b86d5a3e2..5da71d2336 100644
--- a/search/search_tests_support/test_search_request.hpp
+++ b/search/search_tests_support/test_search_request.hpp
@@ -2,8 +2,8 @@
 
 #include "geometry/rect2d.hpp"
 
-#include "search/params.hpp"
 #include "search/result.hpp"
+#include "search/search_params.hpp"
 
 #include "std/condition_variable.hpp"
 #include "std/mutex.hpp"
@@ -36,8 +36,8 @@ public:
 
 protected:
   TestSearchRequest(TestSearchEngine & engine, string const & query, string const & locale,
-                    Mode mode, m2::RectD const & viewport, TOnStarted onStarted,
-                    TOnResults onResults);
+                    Mode mode, m2::RectD const & viewport, SearchParams::TOnStarted onStarted,
+                    SearchParams::TOnResults onResults);
 
   void SetUpCallbacks(SearchParams & params);
 
diff --git a/search/viewport_search_callback.cpp b/search/viewport_search_callback.cpp
new file mode 100644
index 0000000000..6fce48768b
--- /dev/null
+++ b/search/viewport_search_callback.cpp
@@ -0,0 +1,43 @@
+#include "search/viewport_search_callback.hpp"
+
+#include "search/result.hpp"
+
+namespace search
+{
+ViewportSearchCallback::ViewportSearchCallback(Delegate & delegate, TOnResults onResults)
+  : m_delegate(delegate), m_onResults(move(onResults)), m_hotelsModeSet(false), m_firstCall(true)
+{
+}
+
+void ViewportSearchCallback::operator()(Results const & results)
+{
+  m_hotelsClassif.AddBatch(results);
+
+  if (!m_hotelsModeSet && m_hotelsClassif.IsHotelQuery())
+  {
+    m_delegate.SetHotelDisplacementMode();
+    m_hotelsModeSet = true;
+  }
+
+  if (!results.IsEndMarker())
+  {
+    auto & delegate = m_delegate;
+    bool const firstCall = m_firstCall;
+
+    m_delegate.RunUITask([&delegate, firstCall, results]() {
+      if (!delegate.IsViewportSearchActive())
+        return;
+
+      if (firstCall)
+        delegate.ClearViewportSearchResults();
+
+      delegate.ShowViewportSearchResults(results);
+    });
+  }
+
+  if (m_onResults)
+    m_onResults(results);
+
+  m_firstCall = false;
+}
+}  // namespace search
diff --git a/search/viewport_search_callback.hpp b/search/viewport_search_callback.hpp
new file mode 100644
index 0000000000..ffc4c25c02
--- /dev/null
+++ b/search/viewport_search_callback.hpp
@@ -0,0 +1,44 @@
+#pragma once
+
+#include "search/hotels_classifier.hpp"
+#include "search/search_params.hpp"
+
+#include "std/function.hpp"
+
+namespace search
+{
+class Results;
+
+// An on-results-callback that should be used for interactive search.
+//
+// *NOTE* the class is NOT thread safe.
+class ViewportSearchCallback
+{
+public:
+  class Delegate
+  {
+  public:
+    virtual ~Delegate() = default;
+
+    virtual void RunUITask(function<void()> fn) = 0;
+    virtual void SetHotelDisplacementMode() = 0;
+    virtual bool IsViewportSearchActive() const = 0;
+    virtual void ShowViewportSearchResults(Results const & results) = 0;
+    virtual void ClearViewportSearchResults() = 0;
+  };
+
+  using TOnResults = SearchParams::TOnResults;
+
+  ViewportSearchCallback(Delegate & delegate, TOnResults onResults);
+
+  void operator()(Results const & results);
+
+private:
+  Delegate & m_delegate;
+  TOnResults m_onResults;
+
+  HotelsClassifier m_hotelsClassif;
+  bool m_hotelsModeSet;
+  bool m_firstCall;
+};
+}  // namespace search
diff --git a/search/viewport_search_params.hpp b/search/viewport_search_params.hpp
new file mode 100644
index 0000000000..5067ef5eb4
--- /dev/null
+++ b/search/viewport_search_params.hpp
@@ -0,0 +1,19 @@
+#pragma once
+
+#include "std/function.hpp"
+#include "std/string.hpp"
+
+namespace search
+{
+struct ViewportSearchParams
+{
+  using TOnStarted = function<void()>;
+  using TOnCompleted = function<void()>;
+
+  string m_query;
+  string m_inputLocale;
+
+  TOnStarted m_onStarted;
+  TOnCompleted m_onCompleted;
+};
+}  // namespace search