large changes

lib/fes.lua

@@ -1,4 +1,5 @@
 local std = require("lib.std")
+local symbol = require("lib.symbol")
 
 local M = {}
 M.__index = M
@@ -318,11 +319,30 @@ em, i { font-style: italic; }
 	return setmetatable(self, M)
 end
 
-function M:custom(str)
+function M:g(str)
 	table.insert(self.parts, str)
 	return self
 end
 
+function M:extend(name, tbl)
+	if type(name) ~= "string" then
+		error("First argument to extend must be a string (namespace name)")
+	end
+	if type(tbl) ~= "table" then
+		error("Second argument to extend must be a table of functions")
+	end
+	self[name] = {}
+	for k, v in pairs(tbl) do
+		if type(v) ~= "function" then
+			error("Extension values must be functions, got " .. type(v) .. " for key " .. k)
+		end
+		self[name][k] = function(...)
+			return v(self, ...)
+		end
+	end
+	return self
+end
+
 for name, func in pairs(std) do
 	if type(func) == "function" then
 		M[name] = function(self, ...)
@@ -340,9 +360,11 @@ function M:build()
 	header = header:gsub(
 		"{{FAVICON}}",
 		favicon_html
-			or [[<link rel="icon" href="data:image/svg+xml,<svg xmlns=%%22http://www.w3.org/2000/svg%%22 viewBox=%%220 0 100 100%%22><text y=%%22.9em%%22 font-size=%%2290%%22>🔥</text></svg>">]]
+		or
+		[[<link rel="icon" href="data:image/svg+xml,<svg xmlns=%%22http://www.w3.org/2000/svg%%22 viewBox=%%220 0 100 100%%22><text y=%%22.9em%%22 font-size=%%2290%%22>🔥</text></svg>">]]
 	)
-	local footer = self.footer:gsub("{{COPYRIGHT}}", self.copyright or "&#169; The Copyright Holder")
+	local footer = self.footer:gsub("{{COPYRIGHT}}",
+		self.copyright or symbol.legal.copyright .. "The Copyright Holder")
 	return header .. table.concat(self.parts, "\n") .. footer
 end