From c7b6554668fb81a43d5018e25ee52a7b8ef80c7f Mon Sep 17 00:00:00 2001
From: Michael Carlberg <c@rlberg.se>
Date: Fri, 20 May 2016 05:34:07 +0200
Subject: [PATCH] fix(mpd) Support relative seek percentages

---
 src/interfaces/mpd.cpp |  4 ++++
 src/modules/mpd.cpp    | 12 +++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/interfaces/mpd.cpp b/src/interfaces/mpd.cpp
index b62fa3f4..e8e41f29 100644
--- a/src/interfaces/mpd.cpp
+++ b/src/interfaces/mpd.cpp
@@ -209,6 +209,10 @@ namespace mpd
       auto status = this->get_status();
       if (status->total_time == 0)
         return;
+      if (percentage < 0)
+        percentage = 0;
+      else if (percentage > 100)
+        percentage = 100;
       int pos = float(status->total_time) * percentage / 100.0f + 0.5f;
       this->check_prerequisites_commands_list();
       mpd_run_seek_id(this->connection.get(), status->song_id, pos);
diff --git a/src/modules/mpd.cpp b/src/modules/mpd.cpp
index 7c6ec117..774834b7 100644
--- a/src/modules/mpd.cpp
+++ b/src/modules/mpd.cpp
@@ -290,9 +290,19 @@ bool MpdModule::handle_command(const std::string& cmd)
         mpd->random(true);
     else if (cmd.find(EVENT_SEEK) == 0) {
       auto s = cmd.substr(std::strlen(EVENT_SEEK));
+      int perc = 0;
       if (s.empty())
         return false;
-      mpd->seek(std::atoi(s.c_str()));
+      if (s[0] == '+') {
+        perc = this->status->get_elapsed_percentage()
+          + std::atoi(s.substr(1).c_str());
+      } else if (s[0] == '-') {
+        perc = this->status->get_elapsed_percentage()
+          - std::atoi(s.substr(1).c_str());
+      } else {
+        perc = std::atoi(s.c_str());
+      }
+      mpd->seek(perc);
     } else
       return false;
   } catch (mpd::Exception &e) {