Add support for defining and referencing highlighters

* defhl <name> defines a shared highlighter
* addhl -def-group <name> adds highlighters to the defined highlighter
* addhl ref <name> add the defined highlighter to the window's ones

1 files changed, 7 insertions, 2 deletions

diff --git a/src/function_group.hh b/src/function_group.hh
index 491debf9..7e598a94 100644
--- a/src/function_group.hh
+++ b/src/function_group.hh
@@ -33,15 +33,20 @@ public:
         m_functions.remove(id);
     }
 
-    FunctionGroup& get_group(const String& id)
+    FunctionGroup& get_group(const String& path, Codepoint path_separator = 0)
     {
+        auto sep_it = std::find(path.begin(), path.end(), path_separator);
+        String id(path.begin(), sep_it);
         auto it = m_functions.find(id);
         if (it == m_functions.end())
             throw runtime_error("no such id: " + id);
         FunctionGroup* group = it->second.template target<FunctionGroup>();
         if (not group)
             throw runtime_error("not a group: " + id);
-        return *group;
+        if (sep_it != path.end())
+            return group->get_group(String(sep_it+1, path.end()), path_separator);
+        else
+            return  *group;
     }
 
     CandidateList complete_id(const String& prefix, ByteCount cursor_pos) const