From fb4702dd497f31e2f63e5a6e99e0c74099972c02 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Sat, 28 Sep 2019 22:59:16 +0200
Subject: [PATCH] LibHTML: Add virtual Node::tag_name()

This is analogous to the DOM's Node.tagName and makes it easy to ask
"hey, what kinda thing is this Node?"
---
 Libraries/LibHTML/DOM/Document.h | 2 ++
 Libraries/LibHTML/DOM/Element.h  | 2 +-
 Libraries/LibHTML/DOM/Node.h     | 3 +++
 Libraries/LibHTML/DOM/Text.h     | 2 ++
 4 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/Libraries/LibHTML/DOM/Document.h b/Libraries/LibHTML/DOM/Document.h
index 2b3c10e9bd..66a64e92aa 100644
--- a/Libraries/LibHTML/DOM/Document.h
+++ b/Libraries/LibHTML/DOM/Document.h
@@ -23,6 +23,8 @@ public:
     void add_sheet(const StyleSheet& sheet) { m_sheets.append(sheet); }
     const NonnullRefPtrVector<StyleSheet>& stylesheets() const { return m_sheets; }
 
+    virtual String tag_name() const override { return "#document"; }
+
 private:
     OwnPtr<StyleResolver> m_style_resolver;
     NonnullRefPtrVector<StyleSheet> m_sheets;
diff --git a/Libraries/LibHTML/DOM/Element.h b/Libraries/LibHTML/DOM/Element.h
index beb5618bd8..1b2d2b0ce7 100644
--- a/Libraries/LibHTML/DOM/Element.h
+++ b/Libraries/LibHTML/DOM/Element.h
@@ -26,7 +26,7 @@ public:
     explicit Element(const String& tag_name);
     virtual ~Element() override;
 
-    const String& tag_name() const { return m_tag_name; }
+    virtual String tag_name() const override { return m_tag_name; }
 
     String attribute(const String& name) const;
     void set_attribute(const String& name, const String& value);
diff --git a/Libraries/LibHTML/DOM/Node.h b/Libraries/LibHTML/DOM/Node.h
index c26ed8a5aa..506da734a5 100644
--- a/Libraries/LibHTML/DOM/Node.h
+++ b/Libraries/LibHTML/DOM/Node.h
@@ -2,6 +2,7 @@
 
 #include <AK/Badge.h>
 #include <AK/RefPtr.h>
+#include <AK/String.h>
 #include <AK/Vector.h>
 #include <LibHTML/TreeNode.h>
 
@@ -30,6 +31,8 @@ public:
     RefPtr<LayoutNode> create_layout_node(const StyleResolver&, const StyleProperties* parent_properties) const;
     RefPtr<LayoutNode> create_layout_tree(const StyleResolver&, const StyleProperties* parent_properties) const;
 
+    virtual String tag_name() const = 0;
+
 protected:
     explicit Node(NodeType);
 
diff --git a/Libraries/LibHTML/DOM/Text.h b/Libraries/LibHTML/DOM/Text.h
index 33b689a4b5..d09ab12740 100644
--- a/Libraries/LibHTML/DOM/Text.h
+++ b/Libraries/LibHTML/DOM/Text.h
@@ -10,6 +10,8 @@ public:
 
     const String& data() const { return m_data; }
 
+    virtual String tag_name() const override { return "#text"; }
+
 private:
     String m_data;
 };