1 files changed, 60 insertions, 0 deletions
diff --git a/src/nvim/os/tty.c b/src/nvim/os/tty.c
new file mode 100644
index 0000000000..bd5b9b4506
--- /dev/null
+++ b/src/nvim/os/tty.c
@@ -0,0 +1,60 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
+//
+// Terminal/console utils
+//
+
+#include "nvim/os/os.h"
+
+#ifdef INCLUDE_GENERATED_DECLARATIONS
+# include "os/tty.c.generated.h"
+#endif
+
+#ifdef WIN32
+# if !defined(ENABLE_VIRTUAL_TERMINAL_PROCESSING)
+#  define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x0004
+# endif
+/// Guesses the terminal-type.  Calls SetConsoleMode() and uv_set_vterm_state()
+/// if appropriate.
+///
+/// @param[in,out] term Name of the guessed terminal, statically-allocated
+/// @param out_fd stdout file descriptor
+void os_tty_guess_term(const char **term, int out_fd)
+{
+  bool winpty = (os_getenv("NVIM") != NULL);
+
+  if (winpty) {
+    // Force TERM=win32con when running in winpty.
+    *term = "win32con";
+    uv_set_vterm_state(UV_UNSUPPORTED);
+    return;
+  }
+
+  bool conemu_ansi = strequal(os_getenv("ConEmuANSI"), "ON");
+  bool vtp = false;
+
+  HANDLE handle = (HANDLE)_get_osfhandle(out_fd);
+  DWORD dwMode;
+  if (handle != INVALID_HANDLE_VALUE && GetConsoleMode(handle, &dwMode)) {
+    dwMode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
+    if (SetConsoleMode(handle, dwMode)) {
+      vtp = true;
+    }
+  }
+
+  if (*term == NULL) {
+    if (vtp) {
+      *term = "vtpcon";
+    } else if (conemu_ansi) {
+      *term = "conemu";
+    } else {
+      *term = "win32con";
+    }
+  }
+
+  if (conemu_ansi) {
+    uv_set_vterm_state(UV_SUPPORTED);
+  }
+}
+#endif