From 912e7b10facdd3b2565423206ae25b1d6e4f7dd9 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@gmail.com>
Date: Sat, 20 Jun 2026 11:54:06 +0200
Subject: lib: add xterm policy

---
 ttwhy/routers/echo.cppm | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

(limited to 'ttwhy/routers')

diff --git a/ttwhy/routers/echo.cppm b/ttwhy/routers/echo.cppm
index 40e68d6..7f2550e 100644
--- a/ttwhy/routers/echo.cppm
+++ b/ttwhy/routers/echo.cppm
@@ -22,6 +22,8 @@ namespace ttwhy::routers
   export template<typename StreamType>
   struct echo
   {
+    using terminal_policy = scanners::xterm_policy;
+
     explicit echo(StreamType & stream)
         : m_output_stream{stream}
     {}
@@ -42,7 +44,7 @@ namespace ttwhy::routers
             }
             else if constexpr (std::same_as<scanners::navigation_event, event_type>)
             {
-              co_await process_navigation_key(event.key);
+              co_await process_navigation_key(event);
             }
           },
           event);
@@ -77,16 +79,23 @@ namespace ttwhy::routers
       };
     }
 
-    auto process_navigation_key(scanners::navigation_key key) -> asio::awaitable<void>
+    auto process_navigation_key(scanners::navigation_event event) -> asio::awaitable<void>
     {
-      switch (key)
+      auto modifiers = std::to_underlying(event.modifiers);
+
+      switch (event.key)
       {
         case scanners::navigation_key::delete_key:
-          co_await asio::async_write(m_output_stream, asio::buffer("{DEL}"), asio::as_tuple(asio::use_awaitable));
+        {
+          auto message = std::format("{{DEL, MODS:{}}}", static_cast<int>(modifiers));
+          co_await asio::async_write(m_output_stream, asio::buffer(message), asio::as_tuple(asio::use_awaitable));
           break;
+        }
         default:
-          co_await asio::async_write(m_output_stream, asio::buffer(std::format("{{NAV:{}}}", std::to_underlying(key))),
-                                     asio::as_tuple(asio::use_awaitable));
+        {
+          auto message = std::format("{{NAV:{}, MODS:{}}}", static_cast<int>(event.key), static_cast<int>(modifiers));
+          co_await asio::async_write(m_output_stream, asio::buffer(message), asio::as_tuple(asio::use_awaitable));
+        }
       }
     }
 
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