From dafe6ccfd17ede3af0c8a92cc06a545c4d1723ef Mon Sep 17 00:00:00 2001
From: Victor Kareh <vkareh@redhat.com>
Date: Fri, 25 Jul 2025 07:22:50 -0400
Subject: clock: Backport Evolution calendar integration from gnome-panel

Add Evolution Data Server (EDS) calendar integration to the MATE panel
clock applet, most of it ported from gnome-panel's clock applet. This
allows users to view calendar events and tasks directly from the clock
popup calendar.

The calendar integration is disabled by default and can be enabled
with --enable-eds during configuration. When disabled, the clock
applet functions normally without any EDS dependencies.
---
 configure.ac | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index ca881ef8..23c132cd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -110,6 +110,27 @@ PKG_CHECK_MODULES(CLOCK, pango >= $PANGO_REQUIRED gtk+-3.0 >= $GTK_REQUIRED glib
 AC_SUBST(CLOCK_CFLAGS)
 AC_SUBST(CLOCK_LIBS)
 
+# Check for Evolution Data Server support for calendar integration
+AC_ARG_ENABLE([eds],
+  AS_HELP_STRING([--enable-eds], [Enable Evolution Data Server calendar integration @<:@default=auto@:>@]),
+  [enable_eds=$enableval],
+  [enable_eds=auto])
+
+if test "x$enable_eds" != "xno"; then
+  PKG_CHECK_MODULES(EDS, [libecal-2.0 >= 3.33.2 libedataserver-1.2 >= 3.5.3], have_eds=yes, have_eds=no)
+  if test "x$have_eds" = "xyes"; then
+    AC_DEFINE(HAVE_EDS, 1, [Define if evolution-data-server is available])
+  elif test "x$enable_eds" = "xyes"; then
+    AC_MSG_ERROR([EDS support requested but evolution-data-server development libraries not found])
+  fi
+else
+  have_eds=no
+fi
+
+AM_CONDITIONAL(HAVE_EDS, test "x$have_eds" = "xyes")
+AC_SUBST(EDS_CFLAGS)
+AC_SUBST(EDS_LIBS)
+
 # Make it possible to compile the applets in-process
 PANEL_INPROCESS_NONE=
 PANEL_INPROCESS_ALL=
@@ -381,6 +402,7 @@ echo "
         Wayland support:               ${have_wayland}
         X11 support:                   ${have_x11}
         XRandr support:                ${have_randr}
+        Evolution Data Server support: ${have_eds}
         Build introspection support:   ${found_introspection}
         Build gtk-doc documentation:   ${enable_gtk_doc}
 
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