win/TUI: enable mouse on ConEmu and vtpcon without vti

src/nvim/event/stream.c

@@ -11,6 +11,9 @@
 #include "nvim/rbuffer.h"
 #include "nvim/macros.h"
 #include "nvim/event/stream.h"
+#ifdef WIN32
+# include "nvim/os/os_win_console.h"
+#endif
 
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "event/stream.c.generated.h"
@@ -21,10 +24,6 @@
 #define uv_stream_get_write_queue_size(stream) stream->write_queue_size
 #endif
 
-#ifndef ENABLE_VIRTUAL_TERMINAL_INPUT
-# define ENABLE_VIRTUAL_TERMINAL_INPUT 0x0200
-#endif
-
 /// Sets the stream associated with `fd` to "blocking" mode.
 ///
 /// @return `0` on success, or libuv error code on failure.

src/nvim/os/os_win_console.c

@@ -2,8 +2,14 @@
 // it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
 
 #include "nvim/vim.h"
+#include "nvim/os/input.h"
 #include "nvim/os/os_win_console.h"
 
+#ifdef INCLUDE_GENERATED_DECLARATIONS
+# include "os/os_win_console.c.generated.h"
+#endif
+
+
 int os_get_conin_fd(void)
 {
   const HANDLE conin_handle = CreateFile("CONIN$",
@@ -40,3 +46,29 @@ 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;
+}

src/nvim/os/os_win_console.h

@@ -5,4 +5,8 @@
 # include "os/os_win_console.h.generated.h"
 #endif
 
+#ifndef ENABLE_VIRTUAL_TERMINAL_INPUT
+# define ENABLE_VIRTUAL_TERMINAL_INPUT 0x0200
+#endif
+
 #endif  // NVIM_OS_OS_WIN_CONSOLE_H

src/nvim/os/tty.c

@@ -28,7 +28,7 @@ void os_tty_guess_term(const char **term, int out_fd)
   if (winpty) {
     // Force TERM=win32con when running in winpty.
     *term = "win32con";
-    uv_set_vterm_state(UV_UNSUPPORTED);
+    uv_tty_set_vterm_state(UV_TTY_UNSUPPORTED);
     return;
   }
 
@@ -55,7 +55,7 @@ void os_tty_guess_term(const char **term, int out_fd)
   }
 
   if (conemu_ansi) {
-    uv_set_vterm_state(UV_SUPPORTED);
+    uv_tty_set_vterm_state(UV_TTY_SUPPORTED);
   }
 }
 #endif

src/nvim/tui/tui.c

@@ -33,6 +33,9 @@
 #include "nvim/os/os.h"
 #include "nvim/os/signal.h"
 #include "nvim/os/tty.h"
+#ifdef WIN32
+# include "nvim/os/os_win_console.h"
+#endif
 #include "nvim/strings.h"
 #include "nvim/syntax.h"
 #include "nvim/ui_bridge.h"
@@ -1015,8 +1018,22 @@ 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 traking 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
   }
 }
 
@@ -1024,8 +1041,22 @@ 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 traking 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
   }
 }