log/level: move level_width query into level unit

log/level.cpp

@@ -136,3 +136,34 @@ cruft::log::log_level (void)
 
     return s_log_level_value;
 }
+
+
+///////////////////////////////////////////////////////////////////////////////
+std::size_t
+cruft::log::level_width (void)
+{
+    static constexpr
+    cruft::log::level_t
+        ALL_LEVELS[] = {
+        cruft::log::EMERGENCY,
+        cruft::log::ALERT,
+        cruft::log::CRITICAL,
+        cruft::log::ERROR,
+        cruft::log::WARN,
+        cruft::log::NOTICE,
+        cruft::log::INFO,
+        cruft::log::DEBUG,
+    };
+
+
+    static std::size_t width = [] {
+        size_t hi = 0;
+
+        for (auto i: ALL_LEVELS)
+            hi = cruft::max (to_string (i).size (), hi);
+
+        return hi;
+    } ();
+
+    return width;
+}

log/level.hpp

@@ -77,4 +77,7 @@ namespace cruft::log {
 
     bool needs_break (level_t);
 
+
+    /// Calculate the maximum width, in characters, of all level names.
+    std::size_t level_width (void);
 }

log/sink/console.cpp

@@ -24,37 +24,6 @@
 using cruft::log::sink::console;
 
 
-///////////////////////////////////////////////////////////////////////////////
-static std::size_t
-level_width (void)
-{
-    static constexpr
-    cruft::log::level_t
-        ALL_LEVELS[] = {
-        cruft::log::EMERGENCY,
-        cruft::log::ALERT,
-        cruft::log::CRITICAL,
-        cruft::log::ERROR,
-        cruft::log::WARN,
-        cruft::log::NOTICE,
-        cruft::log::INFO,
-        cruft::log::DEBUG,
-    };
-
-
-    static size_t width = [] {
-        size_t hi = 0;
-
-        for (auto i: ALL_LEVELS)
-            hi = cruft::max (to_string (i).size (), hi);
-
-        return hi;
-    } ();
-
-    return width;
-}
-
-
 ///////////////////////////////////////////////////////////////////////////////
 static
 cruft::term::csi::graphics