Comma-separated tokens

lib/phlex/sgml.rb

@@ -604,7 +604,7 @@ def json_escape(string)
 		end
 	end
 
-	private def __nested_tokens__(tokens)
+	private def __nested_tokens__(tokens, sep = " ")
 		buffer = +""
 
 		i, length = 0, tokens.length
@@ -615,28 +615,28 @@ def json_escape(string)
 			case token
 			when String
 				if i > 0
-					buffer << " " << token
+					buffer << sep << token
 				else
 					buffer << token
 				end
 			when Symbol
 				if i > 0
-					buffer << " " << token.name.tr("_", "-")
+					buffer << sep << token.name.tr("_", "-")
 				else
 					buffer << token.name.tr("_", "-")
 				end
 			when Integer, Float, Phlex::SGML::SafeObject
 				if i > 0
-					buffer << " " << token.to_s
+					buffer << sep << token.to_s
 				else
 					buffer << token.to_s
 				end
 			when Array
 				if token.length > 0
 					if i > 0
-						buffer << " " << __nested_tokens__(token)
+						buffer << sep << __nested_tokens__(token, sep)
 					else
-						buffer << __nested_tokens__(token)
+						buffer << __nested_tokens__(token, sep)
 					end
 				end
 			when nil

lib/phlex/sgml/elements.rb

@@ -1,6 +1,39 @@
 # frozen_string_literal: true
 
 module Phlex::SGML::Elements
+	COMMA_SEPARATED_TOKENS = {
+		img: <<~RUBY,
+			if Array === (tokens = attributes[:srcset])
+				attributes[:srcset] = __nested_tokens__(tokens, ", ")
+			end
+		RUBY
+		link: <<~RUBY,
+			if Array === (media_tokens = attributes[:href])
+				attributes[:media] = __nested_tokens__(media_tokens, ", ")
+			end
+
+			if Array === (sizes_tokens = attributes[:sizes])
+				attributes[:sizes] = __nested_tokens__(sizes_tokens, ", ")
+			end
+		RUBY
+		input: <<~RUBY,
+			input_type = attributes[:type]
+
+			if Array === (tokens = attributes[:href]) && (:file == input_type || "file" == input_type)
+				attributes[:accept] = __nested_tokens__(tokens, ", ")
+			end
+		RUBY
+		meta: <<~RUBY,
+			http_equiv = attributes[:http_equiv] || attributes["http-equiv"]
+
+			if Array === (tokens = attributes[:content]) && (
+				:content_security_policy == http_equiv || "content-security-policy" == http_equiv)
+
+				attributes[:content] = __nested_tokens__(tokens, ", ")
+			end
+		RUBY
+	}.freeze
+
 	def __registered_elements__
 		@__registered_elements__ ||= {}
 	end
@@ -23,6 +56,7 @@ def #{method_name}(**attributes)
 					if block_given # with content block
 						buffer << "<#{tag}"
 						begin
+							#{COMMA_SEPARATED_TOKENS[method_name]}
 							buffer << (Phlex::ATTRIBUTE_CACHE[attributes] ||= __attributes__(attributes))
 						ensure
 							buffer << ">"
@@ -53,6 +87,7 @@ def #{method_name}(**attributes)
 					else # without content
 						buffer << "<#{tag}"
 						begin
+							#{COMMA_SEPARATED_TOKENS[method_name]}
 							buffer << (::Phlex::ATTRIBUTE_CACHE[attributes] ||= __attributes__(attributes))
 						ensure
 							buffer << "></#{tag}>"
@@ -114,6 +149,7 @@ def #{method_name}(**attributes)
 				if attributes.length > 0 # with attributes
 					buffer << "<#{tag}"
 					begin
+						#{COMMA_SEPARATED_TOKENS[method_name]}
 						buffer << (::Phlex::ATTRIBUTE_CACHE[attributes] ||= __attributes__(attributes))
 					ensure
 						buffer << ">"