fix(terminal): <Ignore> should be no-op (#37494)

src/nvim/os/pty_conpty_win.c

@@ -169,7 +169,7 @@ void os_conpty_set_size(conpty_t *conpty_object, uint16_t width, uint16_t height
   assert(height <= SHRT_MAX);
   COORD size = { (int16_t)width, (int16_t)height };
   if (pResizePseudoConsole(conpty_object->pty, size) != S_OK) {
-    ELOG("ResizePseudoConsoel failed: error code: %d",
+    ELOG("ResizePseudoConsole failed: error code: %d",
          os_translate_sys_error((int)GetLastError()));
   }
 }

src/nvim/terminal.c

@@ -1030,6 +1030,11 @@ static int terminal_execute(VimState *state, int key)
     map_execute_lua(false, false);
     break;
 
+  case K_IGNORE:
+  case K_NOP:
+    // Do not interrupt a Ctrl-\ sequence or close a finished terminal.
+    break;
+
   case Ctrl_N:
     if (s->got_bsl) {
       return 0;

test/functional/terminal/buffer_spec.lua

@@ -1152,14 +1152,18 @@ describe('on_lines does not emit out-of-bounds line indexes when', function()
 end)
 
 describe('terminal input', function()
+  local chan --- @type integer
+
   before_each(function()
     clear()
-    exec_lua([[
+    chan = exec_lua(function()
       _G.input_data = ''
-      vim.api.nvim_open_term(0, { on_input = function(_, _, _, data)
+      return vim.api.nvim_open_term(0, {
-        _G.input_data = _G.input_data .. data
+        on_input = function(_, _, _, data)
-      end })
+          _G.input_data = _G.input_data .. data
-    ]])
+        end,
+      })
+    end)
     feed('i')
     poke_eventloop()
   end)
@@ -1173,6 +1177,35 @@ describe('terminal input', function()
     feed('aaa<Help>bbb')
     eq('aaabbb', exec_lua([[return _G.input_data]]))
   end)
+
+  it('<Ignore> is no-op', function()
+    feed('aaa<Ignore>bbb')
+    eq('aaabbb', exec_lua([[return _G.input_data]]))
+    eq({ mode = 't', blocking = false }, api.nvim_get_mode())
+    feed([[<C-\><Ignore><C-N>]])
+    eq({ mode = 'nt', blocking = false }, api.nvim_get_mode())
+    feed('v')
+    eq({ mode = 'v', blocking = false }, api.nvim_get_mode())
+    feed('<Esc>')
+    eq({ mode = 'nt', blocking = false }, api.nvim_get_mode())
+    feed('i')
+    eq({ mode = 't', blocking = false }, api.nvim_get_mode())
+    feed([[<C-\><Ignore><C-O>]])
+    eq({ mode = 'ntT', blocking = false }, api.nvim_get_mode())
+    feed('v')
+    eq({ mode = 'v', blocking = false }, api.nvim_get_mode())
+    feed('<Esc>')
+    eq({ mode = 't', blocking = false }, api.nvim_get_mode())
+    fn.chanclose(chan)
+    feed('<MouseMove>')
+    eq({ mode = 't', blocking = false }, api.nvim_get_mode())
+    feed('<Ignore>')
+    eq({ mode = 't', blocking = false }, api.nvim_get_mode())
+    eq('terminal', api.nvim_get_option_value('buftype', { buf = 0 }))
+    feed('<Space>')
+    eq({ mode = 'n', blocking = false }, api.nvim_get_mode())
+    eq('', api.nvim_get_option_value('buftype', { buf = 0 }))
+  end)
 end)
 
 describe('terminal input', function()