feat: implement HTML lexer and integrate tokenization into browser output

1 files changed, 61 insertions, 0 deletions

diff --git a/include/ricochet/parser/html_lexer.hh b/include/ricochet/parser/html_lexer.hh
new file mode 100644
index 0000000..f97bcfa
--- /dev/null
+++ b/include/ricochet/parser/html_lexer.hh
@@ -0,0 +1,61 @@
+/*
+ * Ricochet - A minimalist CLI web browser for fast, distraction-free navigation.
+ * Copyright (C) 2026  Richard Qin
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <string>
+#include <string_view>
+#include <variant>
+#include <vector>
+
+namespace ricochet::parser {
+
+    struct TextToken {
+    std::string content{};
+};
+
+struct TagOpenToken {
+    std::string name{};
+};
+
+struct TagCloseToken {
+    std::string name{};
+};
+
+using HtmlToken = std::variant<TextToken, TagOpenToken, TagCloseToken>;
+
+class HtmlLexer
+{
+public:
+  HtmlLexer() = default;
+  ~HtmlLexer() = default;
+
+  HtmlLexer( const HtmlLexer& ) = delete;
+  HtmlLexer& operator=( const HtmlLexer& ) = delete;
+  HtmlLexer( HtmlLexer&& ) = delete;
+  HtmlLexer& operator=( HtmlLexer&& ) = delete;
+
+  /**
+   * @brief Perform lexical analysis to convert HTML source code into a structured sequence of tokens
+   */
+  std::vector<HtmlToken> tokenize(std::string_view html) const;
+
+private:
+};
+
+} // namespace ricochet::parser
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