implement albumArtist

todo testing

include/modules/mpris/mpris.hpp

@@ -38,6 +38,7 @@ class Mpris : public ALabel {
 
     std::optional<std::string> artist;
     std::optional<std::string> album;
+    std::optional<std::string> album_artist;
     std::optional<std::string> title;
     std::optional<std::string> length;    // as HH:MM:SS
     std::optional<std::string> position;  // same format
@@ -76,6 +77,8 @@ class Mpris : public ALabel {
   std::string player_;
   std::vector<std::string> ignored_players_;
 
+  bool prefer_album_artist_;
+
   PlayerctlPlayerManager* manager;
   PlayerctlPlayer* player;
   std::string lastStatus;

src/modules/mpris/mpris.cpp

@@ -31,6 +31,7 @@ Mpris::Mpris(const std::string& id, const Json::Value& config)
       dynamic_separator_(" - "),
       truncate_hours_(true),
       tooltip_len_limits_(false),
+      prefer_album_artist_(false),
       // this character is used in Gnome so it's fine to use it here
       ellipsis_("\u2026"),
       player_("playerctld"),
@@ -68,6 +69,9 @@ Mpris::Mpris(const std::string& id, const Json::Value& config)
     if (config_["enable-tooltip-len-limits"].isBool()) {
       tooltip_len_limits_ = config["enable-tooltip-len-limits"].asBool();
     }
+    if (config_["prefer-album-artist"].isBool()) {
+      prefer_album_artist_ = config["prefer-album-artist"].asBool();
+    }
   }
 
   if (config["artist-len"].isUInt()) {
@@ -244,6 +248,12 @@ void truncate(std::string& s, const std::string& ellipsis, size_t max_len) {
 
 auto Mpris::getArtistStr(const PlayerInfo& info, bool truncated) -> std::string {
   auto artist = info.artist.value_or(std::string());
+  if (prefer_album_artist_) {
+    auto album_artist = info.album_artist.value_or(std::string());
+    if (!album_artist.empty()) {
+      artist = album_artist;
+    }
+  }
   if (truncated && artist_len_ >= 0) truncate(artist, ellipsis_, artist_len_);
   return artist;
 }
@@ -516,6 +526,7 @@ auto Mpris::getPlayerInfo() -> std::optional<PlayerInfo> {
       .status_string = player_status,
       .artist = std::nullopt,
       .album = std::nullopt,
+      .album_artist = std::nullopt,
       .title = std::nullopt,
       .length = std::nullopt,
   };
@@ -527,6 +538,12 @@ auto Mpris::getPlayerInfo() -> std::optional<PlayerInfo> {
   }
   if (error) goto errorexit;
 
+  if (auto* album_artist_ = playerctl_player_print_metadata_prop(player, "xesam:albumArtist", &error)) {
+    spdlog::debug("mpris[{}]: albumArtist = {}", info.name, album_artist_);
+    info.album_artist = album_artist_;
+    g_free(album_artist_);
+  }
+
   if (auto* album_ = playerctl_player_get_album(player, &error)) {
     spdlog::debug("mpris[{}]: album = {}", info.name, album_);
     info.album = album_;