From: Alan Third <alan@idiocy.org>
Date: Tue, 28 Dec 2021 11:36:46 +0000 (+0000)
Subject: Remove macOS drop-shadows on some frames (bug#28512)
X-Git-Tag: emacs-29.0.90~3263
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=2d4b2e296b5c13a8b8481e7c0d0c26f52d2de257;p=emacs.git

Remove macOS drop-shadows on some frames (bug#28512)

* src/nsterm.m ([EmacsWindow setParentChildRelationships]): Remove
shadows on undecorated child frames.
---

diff --git a/src/nsterm.m b/src/nsterm.m
index 2318f7beab3..41c311e04dc 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -8435,6 +8435,15 @@ not_in_argv (NSString *arg)
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
   [ourView updateCollectionBehavior];
 #endif
+
+  /* Child frames are often used in ways that may mean they should
+     "disappear" into the contents of the parent frame.  macOs's
+     drop-shadows break this effect, so remove them on undecorated
+     child frames.  */
+  if (parentFrame && FRAME_UNDECORATED (ourFrame))
+    [self setHasShadow:NO];
+  else
+    [self setHasShadow:YES];
 #endif