enums: implement operator{<<,>>} for VisualizerType and use it

src/enums.cpp

@@ -137,3 +137,40 @@ std::istream &operator>>(std::istream &is, Design &ui)
 		is.setstate(std::ios::failbit);
 	return is;
 }
+
+std::ostream &operator<<(std::ostream& os, VisualizerType vt)
+{
+	switch (vt)
+	{
+		case VisualizerType::Wave:
+			os << "sound wave";
+			break;
+		case VisualizerType::WaveFilled:
+			os << "sound wave filled";
+			break;
+		case VisualizerType::Spectrum:
+			os << "frequency spectrum";
+			break;
+		case VisualizerType::Ellipse:
+			os << "sound ellipse";
+			break;
+	}
+	return os;
+}
+
+std::istream &operator>>(std::istream& is, VisualizerType &vt)
+{
+	std::string svt;
+	is >> svt;
+	if (svt == "wave")
+		vt = VisualizerType::Wave;
+	else if (svt == "wave_filled")
+		vt = VisualizerType::WaveFilled;
+	else if (svt == "spectrum")
+		vt = VisualizerType::Spectrum;
+	else if (svt == "ellipse")
+		vt = VisualizerType::Ellipse;
+	else
+		is.setstate(std::ios::failbit);
+	return is;
+}

src/enums.h

@@ -40,5 +40,7 @@ std::ostream &operator<<(std::ostream &os, Design ui);
 std::istream &operator>>(std::istream &is, Design &ui);
 
 enum class VisualizerType { Wave, WaveFilled, Spectrum, Ellipse };
+std::ostream &operator<<(std::ostream &os, VisualizerType vt);
+std::istream &operator>>(std::istream &is, VisualizerType &vt);
 
 #endif // NCMPCPP_ENUMS_H

src/settings.cpp

@@ -230,9 +230,8 @@ bool Configuration::read(const std::string &config_path)
 		visualizer_sync_interval, 30, [](unsigned v) {
 			return boost::posix_time::seconds(v);
 	}));
-	p.add("visualizer_type", option_parser::worker([this](std::string &&v) {
-		visualizer_type = stringToVisualizerType( v );
-	}, defaults_to(visualizer_type, VisualizerType::Wave)
+	p.add("visualizer_type", assign_default(
+		visualizer_type, VisualizerType::Wave
 	));
 	p.add("visualizer_look", assign_default<std::string>(
 		visualizer_chars, "●▮", [](std::string &&s) {

src/utility/type_conversions.cpp

@@ -43,20 +43,6 @@ NC::Color stringToColor(const std::string &color)
 	return result;
 }
 
-VisualizerType stringToVisualizerType(const std::string &visualizerType)
-{
-	VisualizerType result = VisualizerType::Wave;
-	if (visualizerType == "wave")
-		result = VisualizerType::Wave;
-	else if (visualizerType == "spectrum")
-		result = VisualizerType::Spectrum;
-	else if (visualizerType == "wave_filled")
-		result = VisualizerType::WaveFilled;
-	else if (visualizerType == "ellipse")
-		result = VisualizerType::Ellipse;
-	return result;
-}
-
 NC::Border stringToBorder(const std::string &border)
 {
 	NC::Border result = NC::Border::None;

src/utility/type_conversions.h

@@ -27,7 +27,6 @@
 #include "enums.h"
 
 NC::Color stringToColor(const std::string &color);
-VisualizerType stringToVisualizerType(const std::string &visualizerType);
 NC::Border stringToBorder(const std::string &border);
 
 std::string tagTypeToString(mpd_tag_type tag);

src/visualizer.cpp

@@ -189,31 +189,22 @@ int Visualizer::windowTimeout()
 
 void Visualizer::spacePressed()
 {
-	std::string visualizerName;
-	if (Config.visualizer_type == VisualizerType::Wave)
+	switch (Config.visualizer_type)
 	{
-		Config.visualizer_type = VisualizerType::WaveFilled;
-		visualizerName = "sound wave filled";
+		case VisualizerType::Wave:
+			Config.visualizer_type = VisualizerType::WaveFilled;
+			break;
+		case VisualizerType::WaveFilled:
+			Config.visualizer_type = VisualizerType::Spectrum;
+			break;
+		case VisualizerType::Spectrum:
+			Config.visualizer_type = VisualizerType::Ellipse;
+			break;
+		case VisualizerType::Ellipse:
+			Config.visualizer_type = VisualizerType::Wave;
+			break;
 	}
-	else if (Config.visualizer_type == VisualizerType::WaveFilled && Config.visualizer_in_stereo)
-	{
-		Config.visualizer_type = VisualizerType::Ellipse;
-		visualizerName = "sound ellipse";
-	}
-#	ifdef HAVE_FFTW3_H
-	else if (Config.visualizer_type == VisualizerType::Ellipse || Config.visualizer_type == VisualizerType::WaveFilled)
-	{
-		Config.visualizer_type = VisualizerType::Spectrum;
-		visualizerName = "frequency spectrum";
-	}
-#	endif // HAVE_FFTW3_H
-	else
-	{
-		Config.visualizer_type = VisualizerType::Wave;
-		visualizerName = "sound wave";
-	}
-
-	Statusbar::printf("Visualization type: %1%", visualizerName.c_str());
+	Statusbar::printf("Visualization type: %1%", Config.visualizer_type);
 }
 
 void Visualizer::DrawSoundWaveStereo(int16_t *buf_left, int16_t *buf_right, ssize_t samples, size_t height)