LibWeb: Add convenience methods to CSS::Parser::Token

Some of these will be removed later, when we move to using is()
exclusively.

Userland/Libraries/LibWeb/CSS/Parser/Token.h

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2020-2021, the SerenityOS developers.
+ * Copyright (c) 2021, Sam Atkins <atkinssj@gmail.com>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -56,22 +57,50 @@ public:
     };
 
     bool is_eof() const { return m_type == TokenType::EndOfFile; }
+    bool is_ident() const { return m_type == TokenType::Ident; }
+    bool is_function() const { return m_type == TokenType::Function; }
+    bool is_at() const { return m_type == TokenType::AtKeyword; }
+    bool is_hash() const { return m_type == TokenType::Hash; }
+    bool is_string() const { return m_type == TokenType::String; }
+    bool is_bad_string() const { return m_type == TokenType::BadString; }
+    bool is_url() const { return m_type == TokenType::Url; }
+    bool is_bad_url() const { return m_type == TokenType::BadUrl; }
+    bool is_delim() const { return m_type == TokenType::Delim; }
+    bool is_number() const { return m_type == TokenType::Number; }
+    bool is_percentage() const { return m_type == TokenType::Percentage; }
+    bool is_dimension() const { return m_type == TokenType::Dimension; }
     bool is_whitespace() const { return m_type == TokenType::Whitespace; }
     bool is_cdo() const { return m_type == TokenType::CDO; }
     bool is_cdc() const { return m_type == TokenType::CDC; }
-    bool is_at() const { return m_type == TokenType::AtKeyword; }
+    bool is_colon() const { return m_type == TokenType::Colon; }
     bool is_semicolon() const { return m_type == TokenType::Semicolon; }
-    bool is_open_curly() const { return m_type == TokenType::OpenCurly; }
+    bool is_comma() const { return m_type == TokenType::Comma; }
     bool is_open_square() const { return m_type == TokenType::OpenSquare; }
+    bool is_close_square() const { return m_type == TokenType::CloseSquare; }
     bool is_open_paren() const { return m_type == TokenType::OpenParen; }
     bool is_close_paren() const { return m_type == TokenType::CloseParen; }
-    bool is_close_square() const { return m_type == TokenType::CloseSquare; }
+    bool is_open_curly() const { return m_type == TokenType::OpenCurly; }
     bool is_close_curly() const { return m_type == TokenType::CloseCurly; }
-    bool is_function() const { return m_type == TokenType::Function; }
-    bool is_colon() const { return m_type == TokenType::Colon; }
-    bool is_ident() const { return m_type == TokenType::Ident; }
-    bool is_delim() const { return m_type == TokenType::Delim; }
-    bool is_comma() const { return m_type == TokenType::Comma; }
+
+    bool is(TokenType type) const { return m_type == type; }
+
+    StringView ident() const
+    {
+        VERIFY(is_ident());
+        return m_value.string_view();
+    }
+
+    StringView delim() const
+    {
+        VERIFY(is_delim());
+        return m_value.string_view();
+    }
+
+    StringView string() const
+    {
+        VERIFY(is_string());
+        return m_value.string_view();
+    }
 
     TokenType mirror_variant() const;
     String bracket_string() const;