actions: require action to be non-null if we query by action type

src/actions.cpp

@@ -282,11 +282,14 @@ bool isMPDMusicDirSet()
 	return true;
 }
 
-BaseAction *get(Actions::Type at)
+BaseAction &get(Actions::Type at)
 {
 	if (AvailableActions.empty())
 		populateActions();
-	return AvailableActions[at];
+	BaseAction *action = AvailableActions[at];
+	// action should be always present if action type in queried
+	assert(action != nullptr);
+	return *action;
 }
 
 BaseAction *get(const std::string &name)
@@ -348,9 +351,9 @@ void MouseEvent::run()
 	) // volume
 	{
 		if (m_mouse_event.bstate & BUTTON2_PRESSED)
-			get(Type::VolumeDown)->execute();
+			get(Type::VolumeDown).execute();
 		else
-			get(Type::VolumeUp)->execute();
+			get(Type::VolumeUp).execute();
 	}
 	else if (m_mouse_event.bstate & (BUTTON1_PRESSED | BUTTON2_PRESSED | BUTTON3_PRESSED | BUTTON4_PRESSED))
 		myScreen->mouseButtonPressed(m_mouse_event);
@@ -2573,8 +2576,8 @@ void seek()
 	int old_timeout = wFooter->getTimeout();
 	wFooter->setTimeout(500);
 	
-	auto seekForward = Actions::get(Actions::Type::SeekForward);
+	auto seekForward = &Actions::get(Actions::Type::SeekForward);
-	auto seekBackward = Actions::get(Actions::Type::SeekBackward);
+	auto seekBackward = &Actions::get(Actions::Type::SeekBackward);
 	
 	SeekingInProgress = true;
 	while (true)

src/actions.h

@@ -50,7 +50,7 @@ enum class Type
 	NextFoundItem, PreviousFoundItem, ToggleFindMode, ToggleReplayGainMode,
 	ToggleSpaceMode, ToggleAddMode, ToggleMouse, ToggleBitrateVisibility,
 	AddRandomItems, ToggleBrowserSortMode, ToggleLibraryTagType,
-	ToggleMediaLibrarySortMode, RefetchLyrics, RefetchArtistInfo,
+	ToggleMediaLibrarySortMode, RefetchLyrics,
 	SetSelectedItemsPriority, FilterPlaylistOnPriorities, ShowSongInfo,
 	ShowArtistInfo, ShowLyrics, Quit, NextScreen, PreviousScreen, ShowHelp,
 	ShowPlaylist, ShowBrowser, ChangeBrowseMode, ShowSearchEngine,
@@ -68,9 +68,6 @@ void setWindowsDimensions();
 bool askYesNoQuestion(const std::string &question, void (*callback)());
 bool isMPDMusicDirSet();
 
-struct BaseAction *get(Type at);
-struct BaseAction *get(const std::string &name);
-
 extern bool OriginalStatusbarVisibility;
 extern bool ExitMainLoop;
 
@@ -105,6 +102,9 @@ private:
 	const char *m_name;
 };
 
+BaseAction &get(Type at);
+BaseAction *get(const std::string &name);
+
 struct Dummy : public BaseAction
 {
 	Dummy() : BaseAction(Type::Dummy, "dummy") { }

src/bindings.cpp

@@ -582,7 +582,6 @@ void BindingsConfiguration::generateDefaults()
 		bind(k, Actions::Type::ToggleBrowserSortMode);
 		bind(k, Actions::Type::ToggleLibraryTagType);
 		bind(k, Actions::Type::RefetchLyrics);
-		bind(k, Actions::Type::RefetchArtistInfo);
 		bind(k, Actions::Type::AddRandomItems);
 	}
 	if (notBound(k = stringToKey("ctrl_p")))

src/bindings.h

@@ -74,7 +74,7 @@ struct Binding
 {
 	typedef std::vector<Actions::BaseAction *> ActionChain;
 	
-	Binding(Actions::Type at) : m_is_single(true), m_action(Actions::get(at)) { }
+	Binding(Actions::Type at) : m_is_single(true), m_action(&Actions::get(at)) { }
 	Binding(const ActionChain &actions) {
 		assert(actions.size() > 0);
 		if (actions.size() == 1) {

src/help.cpp

@@ -348,9 +348,6 @@ void Help::GetKeybindings()
 	KeyDesc(Actions::Type::EditLyrics, "Open lyrics in external editor");
 	KeyDesc(Actions::Type::RefetchLyrics, "Refetch lyrics");
 	
-	KeysSection("Artist info");
-	KeyDesc(Actions::Type::RefetchArtistInfo, "Refetch artist info");
-	
 #	ifdef HAVE_TAGLIB_H
 	KeysSection("Tiny tag editor");
 	KeyDesc(Actions::Type::PressEnter, "Edit tag");