Fix tool-tip display when display margins are non-zero by default

* src/buffer.h (bset_left_margin_cols, bset_right_margin_cols):
New inline functions.
* src/xfns.c (Fx_show_tip):
* src/w32fns.c (Fx_show_tip): Force display margins of the tip
buffer to zero, as it will be displayed in a pseudo-window, which
doesn't support display margins.  (Bug#29627)

1 files changed, 10 insertions, 0 deletions

diff --git a/src/buffer.h b/src/buffer.h
index 46c7c6e5ad6..ecd2360dbca 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -949,6 +949,16 @@ bset_display_count (struct buffer *b, Lisp_Object val)
   b->display_count_ = val;
 }
 INLINE void
+bset_left_margin_cols (struct buffer *b, Lisp_Object val)
+{
+  b->left_margin_cols_ = val;
+}
+INLINE void
+bset_right_margin_cols (struct buffer *b, Lisp_Object val)
+{
+  b->right_margin_cols_ = val;
+}
+INLINE void
 bset_display_time (struct buffer *b, Lisp_Object val)
 {
   b->display_time_ = val;