Make lyrics and last_fm screens lockable and startup screens

NEWS

@@ -16,6 +16,7 @@ ncmpcpp-0.8 (????-??-??)
 * Wide character version of ncurses is now required.
 * Added 'statusbar_time_color' and 'player_state_color' configuration variables for further customization of statusbar.
 * Format information can now be attached to selected color variables in the configuration file. Because of that variable 'progressbar_boldness' is now deprecated in favor of extended 'progressbar_color' and 'progressbar_elapsed_color' (for more information see example configuration file).
+* Lyrics and last_fm can now be startup screens and are lockable.
 
 ncmpcpp-0.7.7 (2016-10-31)
 * Fixed compilation on 32bit platforms.

doc/config

@@ -392,8 +392,9 @@
 ## - "previous" - switch between the current and previous screen.
 ## - "screen1,...,screenN" - switch between given sequence of screens.
 ##
-## Screens available for use: help, playlist, browser, search_engine,
-## media_library, playlist_editor, tag_editor, outputs, visualizer, clock.
+## Screens available for use: help, playlist, browser,
+## search_engine, media_library, playlist_editor, tag_editor,
+## outputs, visualizer, clock, lyrics, last_fm.
 ##
 #screen_switcher_mode = playlist, browser
 #

src/actions.cpp

@@ -97,6 +97,22 @@ bool findSelectedRangeAndPrintInfoIfNot(Iterator &first, Iterator &last)
 	return success;
 }
 
+template <typename Iterator>
+Iterator nextScreenTypeInSequence(Iterator first, Iterator last, ScreenType type)
+{
+	auto it = std::find(first, last, type);
+	if (it == last)
+		return first;
+	else
+	{
+		++it;
+		if (it == last)
+			return first;
+		else
+			return it;
+	}
+}
+
 }
 
 namespace Actions {
@@ -2393,7 +2409,8 @@ void ShowArtistInfo::run()
 	if (!artist.empty())
 	{
 		myLastfm->queueJob(new LastFm::ArtistInfo(artist, Config.lastfm_preferred_language));
-		myLastfm->switchTo();
+		if (!isVisible(myLastfm))
+			myLastfm->switchTo();
 	}
 }
 
@@ -2415,7 +2432,8 @@ void ShowLyrics::run()
 {
 	if (m_song != nullptr)
 		myLyrics->fetch(*m_song);
-	myLyrics->switchTo();
+	if (myScreen == myLyrics || !isVisible(myLyrics))
+		myLyrics->switchTo();
 }
 
 void Quit::run()
@@ -2432,12 +2450,11 @@ void NextScreen::run()
 	}
 	else if (!Config.screen_sequence.empty())
 	{
-		const auto &seq = Config.screen_sequence;
-		auto screen_type = std::find(seq.begin(), seq.end(), myScreen->type());
-		if (++screen_type == seq.end())
-			toScreen(seq.front())->switchTo();
-		else
-			toScreen(*screen_type)->switchTo();
+		auto screen = nextScreenTypeInSequence(
+			Config.screen_sequence.begin(),
+			Config.screen_sequence.end(),
+			myScreen->type());
+		toScreen(*screen)->switchTo();
 	}
 }
 
@@ -2450,12 +2467,11 @@ void PreviousScreen::run()
 	}
 	else if (!Config.screen_sequence.empty())
 	{
-		const auto &seq = Config.screen_sequence;
-		auto screen_type = std::find(seq.begin(), seq.end(), myScreen->type());
-		if (screen_type == seq.begin())
-			toScreen(seq.back())->switchTo();
-		else
-			toScreen(*--screen_type)->switchTo();
+		auto screen = nextScreenTypeInSequence(
+			Config.screen_sequence.rbegin(),
+			Config.screen_sequence.rend(),
+			myScreen->type());
+		toScreen(*screen)->switchTo();
 	}
 }
 

src/lastfm_service.h

@@ -36,7 +36,7 @@ struct Service
 	typedef std::pair<bool, std::string> Result;
 	
 	Service(Arguments args) : m_arguments(args) { }
-	
+
 	virtual const char *name() = 0;
 	virtual Result fetch();
 	

src/screens/lastfm.cpp

@@ -33,7 +33,8 @@ using Global::MainStartY;
 Lastfm *myLastfm;
 
 Lastfm::Lastfm()
-: Screen(NC::Scrollpad(0, MainStartY, COLS, MainHeight, "", Config.main_color, NC::Border()))
+	: Screen(NC::Scrollpad(0, MainStartY, COLS, MainHeight, "", Config.main_color, NC::Border()))
+	, m_refresh_window(false)
 { }
 
 void Lastfm::resize()
@@ -47,13 +48,36 @@ void Lastfm::resize()
 
 std::wstring Lastfm::title()
 {
-	return m_title;
+	if (m_title.empty())
+		return L"Last.fm";
+	else
+		return m_title;
 }
 
 void Lastfm::update()
 {
 	if (m_worker.valid() && m_worker.is_ready())
-		getResult();
+	{
+		auto result = m_worker.get();
+		if (result.first)
+		{
+			w.clear();
+			w << Charset::utf8ToLocale(result.second);
+			m_service->beautifyOutput(w);
+		}
+		else
+			w << " " << NC::Color::Red << result.second << NC::Color::End;
+		// reset m_worker so it's no longer valid
+		m_worker = boost::BOOST_THREAD_FUTURE<LastFm::Service::Result>();
+		m_refresh_window = true;
+	}
+
+	if (m_refresh_window)
+	{
+		m_refresh_window = false;
+		w.flush();
+		w.refresh();
+	}
 }
 
 void Lastfm::switchTo()
@@ -67,20 +91,3 @@ void Lastfm::switchTo()
 	else
 		switchToPreviousScreen();
 }
-
-void Lastfm::getResult()
-{
-	auto result = m_worker.get();
-	if (result.first)
-	{
-		w.clear();
-		w << Charset::utf8ToLocale(result.second);
-		m_service->beautifyOutput(w);
-	}
-	else
-		w << " " << NC::Color::Red << result.second << NC::Color::End;
-	w.flush();
-	w.refresh();
-	// reset m_worker so it's no longer valid
-	m_worker = boost::BOOST_THREAD_FUTURE<LastFm::Service::Result>();
-}

src/screens/lastfm.h

@@ -43,7 +43,7 @@ struct Lastfm: Screen<NC::Scrollpad>, Tabbable
 	
 	virtual void update() override;
 	
-	virtual bool isLockable() override { return false; }
+	virtual bool isLockable() override { return true; }
 	virtual bool isMergable() override { return true; }
 	
 	template <typename ServiceT>
@@ -61,14 +61,13 @@ struct Lastfm: Screen<NC::Scrollpad>, Tabbable
 
 		w.clear();
 		w << "Fetching information...";
-		w.flush();
+		m_refresh_window = true;
 		m_title = ToWString(m_service->name());
 	}
 
 private:
-	void getResult();
-	
 	std::wstring m_title;
+	bool m_refresh_window;
 	
 	std::shared_ptr<LastFm::Service> m_service;
 	boost::BOOST_THREAD_FUTURE<LastFm::Service::Result> m_worker;

src/screens/lyrics.cpp

@@ -259,13 +259,17 @@ void Lyrics::switchTo()
 
 std::wstring Lyrics::title()
 {
-	std::wstring result = L"Lyrics: ";
-	result += Scroller(
-		Format::stringify<wchar_t>(Format::parse(L"{%a - %t}|{%f}"), &m_song),
-		m_scroll_begin,
-		COLS - result.length() - (Config.design == Design::Alternative
-		                          ? 2
-		                          : Global::VolumeState.length()));
+	std::wstring result = L"Lyrics";
+	if (!m_song.empty())
+	{
+		result += L": ";
+		result += Scroller(
+			Format::stringify<wchar_t>(Format::parse(L"{%a - %t}|{%f}"), &m_song),
+			m_scroll_begin,
+			COLS - result.length() - (Config.design == Design::Alternative
+			                          ? 2
+			                          : Global::VolumeState.length()));
+	}
 	return result;
 }
 

src/screens/lyrics.h

@@ -46,7 +46,7 @@ struct Lyrics: Screen<NC::Scrollpad>, Tabbable
 	
 	virtual void update() override;
 	
-	virtual bool isLockable() override { return false; }
+	virtual bool isLockable() override { return true; }
 	virtual bool isMergable() override { return true; }
 
 	// other members

src/screens/screen_type.cpp

@@ -123,6 +123,10 @@ ScreenType stringtoStartupScreenType(const std::string &s)
 	else if (s == "visualizer")
 		result = ScreenType::Visualizer;
 #	endif // ENABLE_VISUALIZER
+	else if (s == "lyrics")
+		result = ScreenType::Lyrics;
+	else if (s == "last_fm")
+		result = ScreenType::Lastfm;
 	return result;
 }