make blocking search constraints change after successful searching optional

it's still enabled by default though.

src/ncmpcpp.cpp

@@ -1206,7 +1206,7 @@ int main(int argc, char *argv[])
 				Config.stop_after_current_song = !Config.stop_after_current_song;
 				ShowMessage("Stop playing after current song: %s", Config.stop_after_current_song ? "on" : "off");
 			}
-			else if (myScreen == mySearcher)
+			else if (myScreen == mySearcher && !mySearcher->Main()->isStatic(0))
 			{
 				mySearcher->Main()->Highlight(SearchEngine::SearchButton);
 				mySearcher->Main()->Highlighting(0);

src/search_engine.cpp

@@ -186,6 +186,8 @@ void SearchEngine::EnterPressed()
 		case 15:
 		{
 			ShowMessage("Searching...");
+			if (w->Size() > StaticOptions)
+				Prepare();
 			Search();
 			if (!w->Back().first)
 			{
@@ -200,8 +202,9 @@ void SearchEngine::EnterPressed()
 				w->InsertSeparator(ResetButton+3);
 				UpdateFoundList();
 				ShowMessage("Searching finished!");
-				for (size_t i = 0; i < StaticOptions-4; i++)
-					w->Static(i, 1);
+				if (Config.block_search_constraints_change)
+					for (size_t i = 0; i < StaticOptions-4; i++)
+						w->Static(i, 1);
 				w->Scroll(wDown);
 				w->Scroll(wDown);
 			}
@@ -212,6 +215,8 @@ void SearchEngine::EnterPressed()
 		case 16:
 		{
 			CLEAR_FIND_HISTORY;
+			itsPattern.Clear();
+			w->Reset();
 			Prepare();
 			ShowMessage("Search state reset");
 			break;
@@ -334,10 +339,8 @@ void SearchEngine::Prepare()
 		catch (List::InvalidItem) { }
 	}
 	
-	itsPattern.Clear();
 	w->SetTitle("");
-	w->Clear();
-	w->Reset();
+	w->Clear(0);
 	w->ResizeBuffer(17);
 	
 	w->IntoSeparator(10);

src/settings.cpp

@@ -267,6 +267,7 @@ void DefaultConfiguration(ncmpcpp_config &conf)
 	conf.clock_display_seconds = false;
 	conf.ignore_leading_the = false;
 	conf.stop_after_current_song = false;
+	conf.block_search_constraints_change = true;
 	conf.set_window_title = true;
 	conf.mpd_port = 6600;
 	conf.mpd_connection_timeout = 15;
@@ -638,6 +639,10 @@ void ReadConfiguration(ncmpcpp_config &conf)
 			{
 				conf.ignore_leading_the = v == "yes";
 			}
+			else if (cl.find("block_search_constraints_change_if_items_found") != string::npos)
+			{
+				conf.block_search_constraints_change = v == "yes";
+			}
 			else if (cl.find("enable_window_title") != string::npos)
 			{
 				conf.set_window_title = v == "yes";

src/settings.h

@@ -159,6 +159,7 @@ struct ncmpcpp_config
 	bool clock_display_seconds;
 	bool ignore_leading_the;
 	bool stop_after_current_song;
+	bool block_search_constraints_change;
 	
 	int mpd_port;
 	int mpd_connection_timeout;