1 files changed, 72 insertions, 0 deletions
diff --git a/ttwhy/scanners/terminal_policies.cppm b/ttwhy/scanners/terminal_policies.cppm
new file mode 100644
index 0000000..87e54b3
--- /dev/null
+++ b/ttwhy/scanners/terminal_policies.cppm
@@ -0,0 +1,72 @@
+module;
+
+#include <string>
+
+export module ttwhy.scanners:terminal_policies;
+
+import :events;
+import :concepts;
+
+namespace ttwhy::scanners
+{
+
+  export struct ansi_policy
+  {
+    constexpr auto static resolve_vt220_keypad(std::string & buffer, ttwhy::ansi_sink auto & sink) -> void
+    {
+      auto key = [](auto terminator) {
+        switch (terminator)
+        {
+          case '1':
+          case '7':
+            return navigation_key::home;
+          case '2':
+            return navigation_key::insert_key;
+          case '3':
+            return navigation_key::delete_key;
+          case '4':
+          case '8':
+            return navigation_key::end;
+          case '5':
+            return navigation_key::page_up;
+          case '6':
+            return navigation_key::page_down;
+          default:
+            return static_cast<navigation_key>(-1);
+        }
+      }(buffer.back());
+      sink(navigation_event{key});
+      buffer.clear();
+    }
+
+    constexpr auto static resolve_vt100_cursor(char terminator, ttwhy::ansi_sink auto & sink) -> void
+    {
+      auto key = [terminator] {
+        switch (terminator)
+        {
+          case 'A':
+            return navigation_key::up;
+          case 'B':
+            return navigation_key::down;
+          case 'C':
+            return navigation_key::right;
+          case 'D':
+            return navigation_key::left;
+          case 'H':
+            return navigation_key::home;
+          case 'F':
+            return navigation_key::end;
+          default:
+            return static_cast<navigation_key>(-1);
+        }
+      }();
+      sink(navigation_event{key});
+    }
+
+    constexpr auto static resolve_ss3(char terminator, ttwhy::ansi_sink auto & sink) -> void
+    {
+      return resolve_vt100_cursor(terminator, sink);
+    }
+  };
+
+}  // namespace ttwhy::scanners