actions: implement filtering playlist on priorities

src/actions.cpp

@@ -2204,9 +2204,9 @@ void SetSelectedItemsPriority::Run()
 	Statusbar() << "Set priority [0-255]: ";
 	std::string strprio = wFooter->getString();
 	UnlockStatusbar();
-	if (!isInteger(strprio.c_str()))
+	if (!isInteger(strprio.c_str(), true))
 		return;
-	int prio = atoi(strprio.c_str());
+	int prio = stringToInt(strprio);
 	if (prio < 0 || prio > 255)
 	{
 		ShowMessage("Number is out of range");
@@ -2215,6 +2215,29 @@ void SetSelectedItemsPriority::Run()
 	myPlaylist->SetSelectedItemsPriority(prio);
 }
 
+bool FilterPlaylistOnPriorities::canBeRun() const
+{
+	return myScreen->ActiveWindow() == myPlaylist->Items;
+}
+
+void FilterPlaylistOnPriorities::Run()
+{
+	using Global::wFooter;
+	
+	LockStatusbar();
+	Statusbar() << "Show songs with priority higher than: ";
+	std::string strprio = wFooter->getString();
+	UnlockStatusbar();
+	if (!isInteger(strprio.c_str(), false))
+		return;
+	unsigned prio = stringToInt(strprio);
+	myPlaylist->Items->filter(myPlaylist->Items->begin(), myPlaylist->Items->end(),
+		[prio](const NC::Menu<MPD::Song>::Item &s) {
+			return s.value().getPrio() > prio;
+	});
+	ShowMessage("Playlist filtered (songs with priority higher than %u)", prio);
+}
+
 void ShowSongInfo::Run()
 {
 	mySongInfo->SwitchTo();
@@ -2578,6 +2601,7 @@ void populateActions()
 	insertAction(new RefetchLyrics());
 	insertAction(new RefetchArtistInfo());
 	insertAction(new SetSelectedItemsPriority());
+	insertAction(new FilterPlaylistOnPriorities());
 	insertAction(new ShowSongInfo());
 	insertAction(new ShowArtistInfo());
 	insertAction(new ShowLyrics());

src/actions.h

@@ -44,7 +44,8 @@ enum ActionType
 	aApplyFilter, aFind, aFindItemForward, aFindItemBackward, aNextFoundItem,
 	aPreviousFoundItem, aToggleFindMode, aToggleReplayGainMode, aToggleSpaceMode, aToggleAddMode,
 	aToggleMouse, aToggleBitrateVisibility, aAddRandomItems, aToggleBrowserSortMode, aToggleLibraryTagType,
-	aRefetchLyrics, aRefetchArtistInfo, aSetSelectedItemsPriority, aShowSongInfo, aShowArtistInfo,
+	aRefetchLyrics, aRefetchArtistInfo, aSetSelectedItemsPriority, aFilterPlaylistOnPriorities,
+	aShowSongInfo, aShowArtistInfo,
 	aShowLyrics, aQuit, aNextScreen, aPreviousScreen, aShowHelp, aShowPlaylist, aShowBrowser,
 	aShowSearchEngine, aShowMediaLibrary, aShowPlaylistEditor, aShowTagEditor, aShowOutputs,
 	aShowVisualizer, aShowClock, aShowServerInfo
@@ -915,6 +916,16 @@ protected:
 	virtual void Run();
 };
 
+struct FilterPlaylistOnPriorities : public Action
+{
+	FilterPlaylistOnPriorities()
+	: Action(aFilterPlaylistOnPriorities, "filter_playlist_on_priorities") { }
+	
+protected:
+	virtual bool canBeRun() const;
+	virtual void Run();
+};
+
 struct ShowSongInfo : public Action
 {
 	ShowSongInfo() : Action(aShowSongInfo, "show_song_info") { }

src/bindings.cpp

@@ -493,7 +493,6 @@ void BindingsConfiguration::generateDefaults()
 	if (notBound(k = stringToKey("q")))
 		bind(k, aQuit);
 	
-	
 	if (notBound(k = stringToKey("-")))
 		bind(k, aVolumeDown);
 }

src/help.cpp

@@ -297,6 +297,7 @@ void Help::GetKeybindings()
 	KeyDesc(aSavePlaylist, "Save playlist");
 	KeyDesc(aSortPlaylist, "Sort playlist");
 	KeyDesc(aReversePlaylist, "Reverse playlist");
+	KeyDesc(aFilterPlaylistOnPriorities, "Filter playlist on priorities");
 	KeyDesc(aJumpToPlayingSong, "Jump to playing song");
 	KeyDesc(aTogglePlayingSongCentering, "Toggle playing song centering");
 	

src/utility/string.cpp

@@ -33,13 +33,13 @@ long stringToLongInt(const std::string &s)
 	return atol(s.c_str());
 }
 
-bool isInteger(const char *s)
+bool isInteger(const char *s, bool accept_signed)
 {
 	assert(s);
 	if (*s == '\0')
 		return false;
 	for (const char *it = s; *it != '\0'; ++it)
-		if (!isdigit(*it) && (it != s || *it != '-'))
+		if (!(isdigit(*it) || (accept_signed && it == s && *it == '-')))
 			return false;
 		return true;
 }

src/utility/string.h

@@ -54,7 +54,7 @@ template <size_t N> struct print<N, std::wstring> {
 
 int stringToInt(const std::string &s);
 long stringToLongInt(const std::string &s);
-bool isInteger(const char *s);
+bool isInteger(const char *s, bool accept_signed);
 
 std::string ToString(const std::wstring &ws);
 std::wstring ToWString(const std::string &s);