make playlist's stats scrollable, also display remaining time on demand

doc/config

@@ -104,6 +104,8 @@
 #
 ##### various settings #####
 #
+#playlist_show_remaining_time = "no"
+#
 #playlist_display_mode = "classic" (classic/columns)
 #
 #browser_display_mode = "classic" (classic/columns)

src/ncmpcpp.cpp

@@ -206,7 +206,7 @@ int main(int argc, char *argv[])
 		// header stuff
 		gettimeofday(&past, 0);
 		if (((past.tv_sec == now.tv_sec && past.tv_usec >= now.tv_usec+500000) || past.tv_sec > now.tv_sec)
-		&&   (myScreen == myBrowser || myScreen == myLyrics)
+		&&   (myScreen == myPlaylist || myScreen == myBrowser || myScreen == myLyrics)
 		   )
 		{
 			redraw_header = 1;
@@ -1451,6 +1451,7 @@ int main(int argc, char *argv[])
 			{
 				time(&timer);
 				myPlaylist->Main()->Highlighting(1);
+				Playlist::ReloadTotalLength = 1;
 				redraw_header = 1;
 			}
 		}

src/playlist.cpp

@@ -34,6 +34,9 @@ using std::vector;
 
 Playlist *myPlaylist = new Playlist;
 
+bool Playlist::ReloadTotalLength = 0;
+bool Playlist::ReloadRemaining = 0;
+
 bool Playlist::BlockNowPlayingUpdate = 0;
 bool Playlist::BlockUpdate = 0;
 bool Playlist::BlockRefreshing = 0;
@@ -81,6 +84,8 @@ void Playlist::SwitchTo()
 	if (myScreen == this)
 		return;
 	
+	itsScrollBegin = 0;
+	
 	if (hasToBeResized)
 		Resize();
 	
@@ -101,7 +106,9 @@ void Playlist::Resize()
 std::string Playlist::Title()
 {
 	std::string result = "Playlist ";
-	result += TotalLength();
+	if (ReloadTotalLength || ReloadRemaining)
+		itsBufferedStats = TotalLength();
+	result += TO_STRING(Scroller(itsBufferedStats, w->GetWidth()-result.length()-volume_state.length(), itsScrollBegin));
 	return result;
 }
 
@@ -266,14 +273,20 @@ std::string Playlist::TotalLength()
 {
 	std::ostringstream result;
 	
-	const int MINUTE = 60;
-	const int HOUR = 60*MINUTE;
-	const int DAY = 24*HOUR;
-	const int YEAR = 365*DAY;
-	int length = 0;
-	
-	for (size_t i = 0; i < w->Size(); i++)
-		length += w->at(i).GetTotalLength();
+	if (ReloadTotalLength)
+	{
+		itsTotalLength = 0;
+		for (size_t i = 0; i < w->Size(); i++)
+			itsTotalLength += (*w)[i].GetTotalLength();
+		ReloadTotalLength = 0;
+	}
+	if (Config.playlist_show_remaining_time && ReloadRemaining && !w->isFiltered())
+	{
+		itsRemainingTime = 0;
+		for (size_t i = NowPlaying; i < w->Size(); i++)
+			itsRemainingTime += (*w)[i].GetTotalLength();
+		ReloadRemaining = 0;
+	}
 	
 	result << '(' << w->Size() << (w->Size() == 1 ? " item" : " items");
 	
@@ -286,48 +299,63 @@ std::string Playlist::TotalLength()
 			result << " (out of " << Mpd->GetPlaylistLength() << ")";
 	}
 	
-	if (length)
+	if (itsTotalLength)
 	{
 		result << ", length: ";
-		int years = length/YEAR;
-		if (years)
-		{
-			result << years << (years == 1 ? " year" : " years");
-			length -= years*YEAR;
-			if (length)
-				result << ", ";
-		}
-		int days = length/DAY;
-		if (days)
-		{
-			result << days << (days == 1 ? " day" : " days");
-			length -= days*DAY;
-			if (length)
-				result << ", ";
-		}
-		int hours = length/HOUR;
-		if (hours)
-		{
-			result << hours << (hours == 1 ? " hour" : " hours");
-			length -= hours*HOUR;
-			if (length)
-				result << ", ";
-		}
-		int minutes = length/MINUTE;
-		if (minutes)
-		{
-			result << minutes << (minutes == 1 ? " minute" : " minutes");
-			length -= minutes*MINUTE;
-			if (length)
-				result << ", ";
-		}
-		if (length)
-			result << length << (length == 1 ? " second" : " seconds");
+		ShowTime(result, itsTotalLength);
+	}
+	if (Config.playlist_show_remaining_time && itsRemainingTime && !w->isFiltered() && w->Size() > 1)
+	{
+		result << " :: remaining: ";
+		ShowTime(result, itsRemainingTime);
 	}
 	result << ')';
 	return result.str();
 }
 
+void Playlist::ShowTime(std::ostringstream &result, size_t length)
+{
+	const int MINUTE = 60;
+	const int HOUR = 60*MINUTE;
+	const int DAY = 24*HOUR;
+	const int YEAR = 365*DAY;
+	
+	int years = length/YEAR;
+	if (years)
+	{
+		result << years << (years == 1 ? " year" : " years");
+		length -= years*YEAR;
+		if (length)
+			result << ", ";
+	}
+	int days = length/DAY;
+	if (days)
+	{
+		result << days << (days == 1 ? " day" : " days");
+		length -= days*DAY;
+		if (length)
+			result << ", ";
+	}
+	int hours = length/HOUR;
+	if (hours)
+	{
+		result << hours << (hours == 1 ? " hour" : " hours");
+		length -= hours*HOUR;
+		if (length)
+			result << ", ";
+	}
+	int minutes = length/MINUTE;
+	if (minutes)
+	{
+		result << minutes << (minutes == 1 ? " minute" : " minutes");
+		length -= minutes*MINUTE;
+		if (length)
+			result << ", ";
+	}
+	if (length)
+		result << length << (length == 1 ? " second" : " seconds");
+}
+
 const MPD::Song *Playlist::NowPlayingSong()
 {
 	bool was_filtered = w->isFiltered();

src/playlist.h

@@ -21,6 +21,8 @@
 #ifndef _PLAYLIST_H
 #define _PLAYLIST_H
 
+#include <sstream>
+
 #include "ncmpcpp.h"
 #include "screen.h"
 #include "song.h"
@@ -28,7 +30,7 @@
 class Playlist : public Screen< Menu<MPD::Song> >
 {
 	public:
-		Playlist() : NowPlaying(-1), OldPlaying(-1) { }
+		Playlist() : NowPlaying(-1), OldPlaying(-1), itsTotalLength(0), itsRemainingTime(0), itsScrollBegin(0) { }
 		~Playlist() { }
 		
 		virtual void Init();
@@ -61,6 +63,9 @@ class Playlist : public Screen< Menu<MPD::Song> >
 		int NowPlaying;
 		int OldPlaying;
 		
+		static bool ReloadTotalLength;
+		static bool ReloadRemaining;
+		
 		static bool BlockNowPlayingUpdate;
 		static bool BlockUpdate;
 		static bool BlockRefreshing;
@@ -68,6 +73,13 @@ class Playlist : public Screen< Menu<MPD::Song> >
 	protected:
 		std::string TotalLength();
 		
+		std::string itsBufferedStats;
+		
+		size_t itsTotalLength;
+		size_t itsRemainingTime;
+		size_t itsScrollBegin;
+		
+		static void ShowTime(std::ostringstream &, size_t);
 		static bool Sorting(MPD::Song *a, MPD::Song *b);
 		
 		static Menu< std::pair<std::string, MPD::Song::GetFunction> > *SortDialog;

src/settings.cpp

@@ -247,6 +247,7 @@ void DefaultConfiguration(ncmpcpp_config &conf)
 	conf.media_lib_primary_tag = MPD_TAG_ITEM_ARTIST;
 	conf.colors_enabled = true;
 	conf.fancy_scrolling = true;
+	conf.playlist_show_remaining_time = false;
 	conf.columns_in_playlist = false;
 	conf.columns_in_browser = false;
 	conf.columns_in_search_engine = false;
@@ -564,6 +565,10 @@ void ReadConfiguration(ncmpcpp_config &conf)
 			{
 				conf.fancy_scrolling = v == "yes";
 			}
+			else if (cl.find("playlist_show_remaining_time") != string::npos)
+			{
+				conf.playlist_show_remaining_time = v == "yes";
+			}
 			else if (cl.find("playlist_display_mode") != string::npos)
 			{
 				conf.columns_in_playlist = v == "columns";

src/settings.h

@@ -138,6 +138,7 @@ struct ncmpcpp_config
 	
 	bool colors_enabled;
 	bool fancy_scrolling;
+	bool playlist_show_remaining_time;
 	bool columns_in_playlist;
 	bool columns_in_browser;
 	bool columns_in_search_engine;

src/status.cpp

@@ -231,6 +231,9 @@ void NcmpcppStatusChanged(Connection *Mpd, StatusChanges changed, void *)
 			FreeSongList(list);
 		}
 		
+		Playlist::ReloadTotalLength = 1;
+		Playlist::ReloadRemaining = 1;
+		
 		if (myScreen == myPlaylist)
 			redraw_header = 1;
 		
@@ -284,6 +287,7 @@ void NcmpcppStatusChanged(Connection *Mpd, StatusChanges changed, void *)
 			{
 				player_state = "Playing: ";
 				myPlaylist->Main()->BoldOption(myPlaylist->NowPlaying, 1);
+				Playlist::ReloadRemaining = 1;
 				changed.ElapsedTime = 1;
 				break;
 			}
@@ -303,6 +307,7 @@ void NcmpcppStatusChanged(Connection *Mpd, StatusChanges changed, void *)
 					myPlaylist->Main()->BoldOption(myPlaylist->OldPlaying, 0);
 				}
 				catch (std::out_of_range) { }
+				Playlist::ReloadRemaining = 1;
 				myPlaylist->NowPlaying = -1;
 				player_state.clear();
 				break;
@@ -342,6 +347,8 @@ void NcmpcppStatusChanged(Connection *Mpd, StatusChanges changed, void *)
 			if (Config.now_playing_lyrics && !Config.repeat_one_mode && myScreen == myLyrics && myOldScreen == myPlaylist)
 				Lyrics::Reload = 1;
 		}
+		Playlist::ReloadRemaining = 1;
+		
 		playing_song_scroll_begin = 0;
 		
 		if (Mpd->GetState() == psPlay)