Fix up serialization of constants

MathML still remains to be added

RoboFile.php

@@ -520,53 +520,61 @@ class RoboFile extends \Robo\Tasks {
                             // skip the definition if the name is not valid
                             continue;
                         }
-                        $attrs[$name] = $attrs[$name] ?? [];
-                        $attrs[$name]["self::HTML_NAMESPACE"] = $attrs[$name]["self::HTML_NAMESPACE"] ?? [];
+                        $attrs['self::NULL_NAMESPACE'][$name] = $attrs['self::NULL_NAMESPACE'][$name] ?? [];
+                        $attrs['self::NULL_NAMESPACE'][$name]['self::HTML_NAMESPACE'] = $attrs['self::NULL_NAMESPACE'][$name]['self::HTML_NAMESPACE'] ?? [];
                         $context = $el->getAttribute("data-dfn-for") ?? "";
                         if (strlen($context)) {
                             $context = explode(",", $context);
-                            $attrs[$name]["self::HTML_NAMESPACE"] = array_merge($attrs[$name]["self::HTML_NAMESPACE"], $context);
+                            $attrs['self::NULL_NAMESPACE'][$name]['self::HTML_NAMESPACE'] = array_merge($attrs['self::NULL_NAMESPACE'][$name]['self::HTML_NAMESPACE'], $context);
                         } elseif (isset($extra[$name])) {
-                            $attrs[$name]["self::HTML_NAMESPACE"] = array_merge($attrs[$name]["self::HTML_NAMESPACE"], $extra[$name]);
+                            $attrs['self::NULL_NAMESPACE'][$name]['self::HTML_NAMESPACE'] = array_merge($attrs['self::NULL_NAMESPACE'][$name]['self::HTML_NAMESPACE'], $extra[$name]);
                         } else {
                             throw new \Exception("Attribute $name oes not have an element list defined; check the HTML specification");
                         }
                     } elseif ($type === "attribute") {
                         $name = trim(trim($el->textContent), "*");
-                        $attrs[$name] = $attrs[$name] ?? [];
-                        $attrs[$name]["self::HTML_NAMESPACE"] = ["*"];
+                        $context = $el->getAttribute("data-dfn-for");
+                        if (preg_match('/^platform object$|^[A-Z]/', $context)) {
+                            // this is either a slot or an IDL attribute
+                            continue;
+                        }
+                        $attrs['self::NULL_NAMESPACE'][$name] = $attrs['self::NULL_NAMESPACE'][$name] ?? [];
+                        $attrs['self::NULL_NAMESPACE'][$name]['self::HTML_NAMESPACE'] = ["*"];
                     }
                 }
                 // do a second pass over attributes which have been collected to find globals and normalize them to a single "*" entry
-                $attrs = array_map(function($v) {
-                    if (array_intersect($v["self::HTML_NAMESPACE"], ["global", "html-global", "htmlsvg-global"])) {
-                        return ["self::HTML_NAMESPACE" => ["*"]];
+                $attrs['self::NULL_NAMESPACE'] = array_map(function($v) {
+                    if (!isset($v['self::HTML_NAMESPACE'])) {
+                        return $v;
+                    } elseif (array_intersect($v['self::HTML_NAMESPACE'], ["global", "html-global", "htmlsvg-global"])) {
+                        return ['self::HTML_NAMESPACE' => ["*"]];
                     } else {
                         return $v;
                     }
-                }, $attrs);
+                }, $attrs['self::NULL_NAMESPACE']);
+                // sort the elements
+                sort($elems['self::HTML_NAMESPACE']);
+                $elems['self::HTML_NAMESPACE'] = array_unique($elems['self::HTML_NAMESPACE']);
             }
             // sort and filter the results for unqiueness
-            sort($elems);
-            ksort($attrs);
-            $elems = array_unique($elems);
-            $attrs = array_map(function($v) {
-                sort($v);
+            ksort($attrs['self::NULL_NAMESPACE']);
+            $attrs['self::NULL_NAMESPACE'] = array_map(function($v) {
+                foreach ($v as $k => $vv) {
+                    sort($v[$k]);
+                }
                 return $v;
-            }, $attrs);
+            }, $attrs['self::NULL_NAMESPACE']);
             // formt the lists as a PHP arrays
-            $elems = array_map(function($e) {
-                return "'$e' => true";
-            }, $elems);
-            $elems = implode(", ", $elems);
-            $attrList = [];
-            foreach ($attrs as $name => $context) {
-                $attrList[] = "'$name' => [\"".implode("\", \"", $context)."\"]";
+            foreach (['elems' => $elems, 'attrs' => $attrs] as $k => $v) {
+                $v = json_encode($v);
+                $v = str_replace(["{", "}", ","], ["[", "]", ", "], $v);
+                $v = preg_replace('/"([^"]+)":/', "'$1' => ", $v);
+                $v = preg_replace("/'(self::[A-Z]+_NAMESPACE)'/", "$1", $v);
+                $$k = $v;
             }
-            $attrs = implode(", ", $attrList);
-            echo "protected const KNOWN_ELEMENTS = [".$elems."];\n";
-            echo "protected const KNOWN_ATTRIBUTES = [".$attrs."];\n";
-            
+            // output the result
+            echo "protected const KNOWN_ELEMENTS = ".$elems.";\n";
+            echo "protected const KNOWN_ATTRIBUTES = ".$attrs.";\n";
         });
         return $c->run();
     }