feat(api): allow win_hide to close cmdwin or non-previous windows

This aligns its behaviour better with `nvim_win_close`.

Note that `:hide` is actually incapable of closing the cmdwin, unlike `:close`
and `:quit`, so this is a bit of a difference in behaviour.

1 files changed, 17 insertions, 0 deletions

diff --git a/src/nvim/window.c b/src/nvim/window.c
index fa7ca53b08..d55bda18c8 100644
--- a/src/nvim/window.c
+++ b/src/nvim/window.c
@@ -2670,6 +2670,23 @@ static bool can_close_floating_windows(void)
   return true;
 }
 
+/// @return true if, considering the cmdwin, `win` is safe to close.
+/// If false and `win` is the cmdwin, it is closed; otherwise, `err` is set.
+bool can_close_in_cmdwin(win_T *win, Error *err)
+  FUNC_ATTR_NONNULL_ALL
+{
+  if (cmdwin_type != 0) {
+    if (win == curwin) {
+      cmdwin_result = Ctrl_C;
+      return false;
+    } else if (win == cmdwin_old_curwin) {
+      api_set_error(err, kErrorTypeException, "%s", e_cmdwin);
+      return false;
+    }
+  }
+  return true;
+}
+
 /// Close the possibly last window in a tab page.
 ///
 /// @param  win          window to close