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+/**
+ * Copyright (c) 2023, Timothy Stack
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of Timothy Stack nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// XXX This code is unused right now, but it's nice and I don't want to delete
+// it just yet.
+
+#ifndef lnav_url_handler_hh
+#define lnav_url_handler_hh
+
+#include <map>
+#include <string>
+
+#include "base/auto_fd.hh"
+#include "base/auto_pid.hh"
+#include "base/isc.hh"
+#include "base/lnav.console.hh"
+#include "base/result.h"
+#include "line_buffer.hh"
+#include "mapbox/variant.hpp"
+
+namespace lnav {
+namespace url_handler {
+
+class looper : public isc::service<looper> {
+public:
+    Result<void, lnav::console::user_message> open(std::string url);
+
+    void close(std::string url);
+
+private:
+    class handler_looper : public isc::service<handler_looper> {
+    public:
+        handler_looper(std::string url,
+                       auto_pid<process_state::running> pid,
+                       auto_fd infd)
+            : isc::service<handler_looper>(url), hl_state(std::move(pid))
+        {
+            this->hl_line_buffer.set_fd(infd);
+        }
+
+    protected:
+        void loop_body() override;
+
+        std::chrono::milliseconds compute_timeout(
+            mstime_t current_time) const override
+        {
+            return std::chrono::milliseconds{0};
+        }
+
+    public:
+        struct handler_completed {};
+
+        using state_v = mapbox::util::variant<auto_pid<process_state::running>,
+                                              handler_completed>;
+
+        file_range hl_last_range;
+        line_buffer hl_line_buffer;
+        state_v hl_state;
+    };
+
+    struct child {};
+
+    std::map<std::string, std::shared_ptr<handler_looper>> l_children;
+};
+
+}  // namespace url_handler
+}  // namespace lnav
+
+#endif