fix(tui): remove dead code #15929

Before #15889, we used our fork of libuv which supports Windows 7/8.
After #15889, we use upstream libuv, which does not support Windows 7 and lacks
mouse/altbuf support for Windows 8 console.

2 files changed, 0 insertions, 54 deletions

diff --git a/src/nvim/os/os_win_console.c b/src/nvim/os/os_win_console.c
index 2c9cb699fc..18e2e02b81 100644
--- a/src/nvim/os/os_win_console.c
+++ b/src/nvim/os/os_win_console.c
@@ -46,29 +46,3 @@ void os_replace_stdout_and_stderr_to_conout(void)
   const int conerr_fd = _open_osfhandle((intptr_t)conout_handle, 0);
   assert(conerr_fd == STDERR_FILENO);
 }
-
-void os_set_vtp(bool enable)
-{
-  static TriState is_legacy = kNone;
-  if (is_legacy == kNone) {
-    uv_tty_vtermstate_t state;
-    uv_tty_get_vterm_state(&state);
-    is_legacy = (state == UV_TTY_UNSUPPORTED) ? kTrue : kFalse;
-  }
-  if (!is_legacy && !os_has_vti()) {
-    uv_tty_set_vterm_state(enable ? UV_TTY_SUPPORTED : UV_TTY_UNSUPPORTED);
-  }
-}
-
-static bool os_has_vti(void)
-{
-  static TriState has_vti = kNone;
-  if (has_vti == kNone) {
-    HANDLE handle = (HANDLE)_get_osfhandle(input_global_fd());
-    DWORD dwMode;
-    if (handle != INVALID_HANDLE_VALUE && GetConsoleMode(handle, &dwMode)) {
-      has_vti = !!(dwMode & ENABLE_VIRTUAL_TERMINAL_INPUT) ? kTrue : kFalse;
-    }
-  }
-  return has_vti == kTrue;
-}
diff --git a/src/nvim/tui/tui.c b/src/nvim/tui/tui.c
index 803ff23cea..612eaf6667 100644
--- a/src/nvim/tui/tui.c
+++ b/src/nvim/tui/tui.c
@@ -1019,22 +1019,8 @@ static void tui_mouse_on(UI *ui)
 {
   TUIData *data = ui->data;
   if (!data->mouse_enabled) {
-#ifdef WIN32
-    // Windows versions with vtp(ENABLE_VIRTUAL_TERMINAL_PROCESSING) and
-    // no vti(ENABLE_VIRTUAL_TERMINAL_INPUT) will need to use mouse tracking of
-    // libuv. For this reason, vtp (vterm) state of libuv is temporarily
-    // disabled because the control sequence needs to be processed by libuv
-    // instead of Windows vtp.
-    // ref. https://docs.microsoft.com/en-us/windows/console/setconsolemode
-    flush_buf(ui);
-    os_set_vtp(false);
-#endif
     unibi_out_ext(ui, data->unibi_ext.enable_mouse);
     data->mouse_enabled = true;
-#ifdef WIN32
-    flush_buf(ui);
-    os_set_vtp(true);
-#endif
   }
 }
 
@@ -1042,22 +1028,8 @@ static void tui_mouse_off(UI *ui)
 {
   TUIData *data = ui->data;
   if (data->mouse_enabled) {
-#ifdef WIN32
-    // Windows versions with vtp(ENABLE_VIRTUAL_TERMINAL_PROCESSING) and
-    // no vti(ENABLE_VIRTUAL_TERMINAL_INPUT) will need to use mouse tracking of
-    // libuv. For this reason, vtp (vterm) state of libuv is temporarily
-    // disabled because the control sequence needs to be processed by libuv
-    // instead of Windows vtp.
-    // ref. https://docs.microsoft.com/en-us/windows/console/setconsolemode
-    flush_buf(ui);
-    os_set_vtp(false);
-#endif
     unibi_out_ext(ui, data->unibi_ext.disable_mouse);
     data->mouse_enabled = false;
-#ifdef WIN32
-    flush_buf(ui);
-    os_set_vtp(true);
-#endif
   }
 }