From 56dad2272cf7f0254e4eab31f3f4e68226a7d5b1 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Tue, 19 Nov 2019 18:22:12 +0100
Subject: [PATCH] LibHTML: Implement the universal selector ("*")

---
 Libraries/LibHTML/CSS/Selector.h         | 1 +
 Libraries/LibHTML/CSS/SelectorEngine.cpp | 2 ++
 Libraries/LibHTML/Dump.cpp               | 3 +++
 Libraries/LibHTML/Parser/CSSParser.cpp   | 6 ++++++
 4 files changed, 12 insertions(+)

diff --git a/Libraries/LibHTML/CSS/Selector.h b/Libraries/LibHTML/CSS/Selector.h
index c30bad10d6..56e96a2569 100644
--- a/Libraries/LibHTML/CSS/Selector.h
+++ b/Libraries/LibHTML/CSS/Selector.h
@@ -9,6 +9,7 @@ public:
     struct Component {
         enum class Type {
             Invalid,
+            Universal,
             TagName,
             Id,
             Class,
diff --git a/Libraries/LibHTML/CSS/SelectorEngine.cpp b/Libraries/LibHTML/CSS/SelectorEngine.cpp
index 56ad75c050..58ef15bd01 100644
--- a/Libraries/LibHTML/CSS/SelectorEngine.cpp
+++ b/Libraries/LibHTML/CSS/SelectorEngine.cpp
@@ -30,6 +30,8 @@ bool matches(const Selector::Component& component, const Element& element)
     }
 
     switch (component.type) {
+    case Selector::Component::Type::Universal:
+        return true;
     case Selector::Component::Type::Id:
         return component.value == element.attribute("id");
     case Selector::Component::Type::Class:
diff --git a/Libraries/LibHTML/Dump.cpp b/Libraries/LibHTML/Dump.cpp
index 424faffd84..ab17073da0 100644
--- a/Libraries/LibHTML/Dump.cpp
+++ b/Libraries/LibHTML/Dump.cpp
@@ -150,6 +150,9 @@ void dump_rule(const StyleRule& rule)
             case Selector::Component::Type::Invalid:
                 type_description = "Invalid";
                 break;
+            case Selector::Component::Type::Universal:
+                type_description = "Universal";
+                break;
             case Selector::Component::Type::Id:
                 type_description = "Id";
                 break;
diff --git a/Libraries/LibHTML/Parser/CSSParser.cpp b/Libraries/LibHTML/Parser/CSSParser.cpp
index f21314e7dd..36669b2c14 100644
--- a/Libraries/LibHTML/Parser/CSSParser.cpp
+++ b/Libraries/LibHTML/Parser/CSSParser.cpp
@@ -224,6 +224,12 @@ public:
             consume_whitespace_or_comments();
         }
 
+        if (peek() == '*') {
+            type = Selector::Component::Type::Universal;
+            consume_one();
+            return Selector::Component { type, Selector::Component::PseudoClass::None, relation, String() };
+        }
+
         if (peek() == '.') {
             type = Selector::Component::Type::Class;
             consume_one();