1 files changed, 23 insertions, 5 deletions
diff --git a/src/nvim/sign_defs.h b/src/nvim/sign_defs.h
index b4f2709d45..687c15bbd6 100644
--- a/src/nvim/sign_defs.h
+++ b/src/nvim/sign_defs.h
@@ -2,20 +2,38 @@
 #define NVIM_SIGN_DEFS_H
 
 #include "nvim/pos.h"
+#include "nvim/types.h"
 
 // signs: line annotations
 
+// Sign group
+typedef struct signgroup_S
+{
+    uint16_t  refcount;   // number of signs in this group
+    int next_sign_id;     // next sign id for this group
+    char_u  sg_name[1];   // sign group name
+} signgroup_T;
+
+// Macros to get the sign group structure from the group name
+#define SGN_KEY_OFF offsetof(signgroup_T, sg_name)
+#define HI2SG(hi) ((signgroup_T *)((hi)->hi_key - SGN_KEY_OFF))
+
 typedef struct signlist signlist_T;
 
 struct signlist
 {
-    int id;             // unique identifier for each placed sign
-    linenr_T lnum;      // line number which has this sign
-    int typenr;         // typenr of sign
-    signlist_T *next;   // next signlist entry
-    signlist_T *prev;   // previous entry -- for easy reordering
+    int id;              // unique identifier for each placed sign
+    linenr_T lnum;       // line number which has this sign
+    int typenr;          // typenr of sign
+    signgroup_T *group;  // sign group
+    int priority;        // priority for highlighting
+    signlist_T *next;    // next signlist entry
+    signlist_T *prev;    // previous entry -- for easy reordering
 };
 
+// Default sign priority for highlighting
+#define SIGN_DEF_PRIO 10
+
 // type argument for buf_getsigntype() and sign_get_attr()
 typedef enum {
   SIGN_ANY,