Disable autocenter mode while searching and filtering

NEWS

@@ -26,6 +26,7 @@ ncmpcpp-0.8 (????-??-??)
 * Added support for fetching lyrics from jah-lyrics.com and plyrics.com.
 * Seek immediately after invoking appropriate action once.
 * Added support for locating current song in playlist editor.
+* Disable autocenter mode while searching and filtering.
 
 ncmpcpp-0.7.7 (2016-10-31)
 * Fixed compilation on 32bit platforms.

src/Makefile.am

@@ -90,6 +90,7 @@ noinst_HEADERS = \
 	utility/html.h \
 	utility/option_parser.h \
 	utility/readline.h \
+	utility/scoped_value.h \
 	utility/shared_resource.h \
 	utility/string.h \
 	utility/type_conversions.h \

src/actions.cpp

@@ -39,6 +39,7 @@
 #include "statusbar.h"
 #include "utility/comparators.h"
 #include "utility/conversion.h"
+#include "utility/scoped_value.h"
 
 #include "curses/menu_impl.h"
 #include "bindings.h"
@@ -1982,6 +1983,7 @@ void ApplyFilter::run()
 
 	try
 	{
+		ScopedValue<bool> disabled_autocenter_mode(Config.autocenter_mode, false);
 		Statusbar::ScopedLock slock;
 		NC::Window::ScopedPromptHook helper(
 			*wFooter,
@@ -3022,6 +3024,7 @@ void findItem(const SearchDirection direction)
 	std::string constraint = w->searchConstraint();
 	try
 	{
+		ScopedValue<bool> disabled_autocenter_mode(Config.autocenter_mode, false);
 		Statusbar::ScopedLock slock;
 		NC::Window::ScopedPromptHook prompt_hook(
 			*wFooter,

src/utility/scoped_value.h

@@ -0,0 +1,44 @@
+/***************************************************************************
+ *   Copyright (C) 2008-2016 by Andrzej Rybczak                            *
+ *   electricityispower@gmail.com                                          *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.              *
+ ***************************************************************************/
+
+#ifndef NCMPCPP_UTILITY_SCOPED_VALUE_H
+#define NCMPCPP_UTILITY_SCOPED_VALUE_H
+
+template <typename ValueT>
+struct ScopedValue
+{
+	ScopedValue(ValueT &ref, ValueT &&new_value)
+		: m_ref(ref)
+	{
+		m_value = ref;
+		m_ref = std::forward<ValueT>(new_value);
+	}
+
+	~ScopedValue()
+	{
+		m_ref = std::move(m_value);
+	}
+
+private:
+	ValueT &m_ref;
+	ValueT m_value;
+};
+
+#endif // NCMPCPP_UTILITY_SCOPED_VALUE_H