vertical-center-linespacing.patch

From d6729f5621abbf374a371dd6fdaa13d7dd209468 Mon Sep 17 00:00:00 2001
From: Merrick Luo <merrick@luois.me>
Date: Sun, 14 Jan 2024 19:02:47 +0800
Subject: [PATCH] Make line spacing centered

---
 src/xdisp.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/xdisp.c b/src/xdisp.c
index 2d85a991e77..2bce1c55d70 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -23338,7 +23338,10 @@ append_space_for_newline (struct it *it, bool default_face_p)
 		}
 	      if (extra_line_spacing > 0)
 		{
-		  it->descent += extra_line_spacing;
+		  int spacing = extra_line_spacing;
+		  it->ascent += spacing;
+		  it->descent += spacing;
+
 		  if (extra_line_spacing > it->max_extra_line_spacing)
 		    it->max_extra_line_spacing = extra_line_spacing;
 		}
@@ -32662,7 +32665,10 @@ gui_produce_glyphs (struct it *it)
 
   if (extra_line_spacing > 0)
     {
-      it->descent += extra_line_spacing;
+      int spacing = extra_line_spacing;
+      it->ascent += spacing;
+      it->descent += spacing;
+
       if (extra_line_spacing > it->max_extra_line_spacing)
 	it->max_extra_line_spacing = extra_line_spacing;
     }
-- 
2.41.0