[folks/wip/tintou/eds-fixes] Conditionally build for EDS<3.41

[Corentin Noël <corentinnoel src gnome org>]

commit 8aaeb110492c6999c98a8421457eb8887819feaa
Author: Corentin Noël <corentin noel collabora com>
Date:   Tue Jun 8 12:13:12 2021 +0200

    Conditionally build for EDS<3.41
    
    Keep support for previous versions. We need to cast GLib.List into GLib.SList as the binding was wrong 
and EDS was using a GLib.SList anyway.

 backends/eds/lib/edsf-persona-store.vala | 25 +++++++++++++++++++++++++
 backends/eds/lib/meson.build             |  4 ++++
 2 files changed, 29 insertions(+)
---
diff --git a/backends/eds/lib/edsf-persona-store.vala b/backends/eds/lib/edsf-persona-store.vala
index 83ccb7cf..2193c0ed 100644
--- a/backends/eds/lib/edsf-persona-store.vala
+++ b/backends/eds/lib/edsf-persona-store.vala
@@ -1224,7 +1224,11 @@ public class Edsf.PersonaStore : Folks.PersonaStore
           signal_id = ((!) this._ebookview).objects_added.connect (
               (_contacts) =>
             {
+#if HAS_EDS_3_41
               GLib.SList<E.Contact> contacts = _contacts.copy_deep ((GLib.CopyFunc<E.Contact>) 
GLib.Object.ref);
+#else
+              GLib.SList<E.Contact> contacts = ((GLib.SList<E.Contact>) _contacts).copy_deep 
((GLib.CopyFunc<E.Contact>) GLib.Object.ref);
+#endif
 
               /* All handlers for objects-added have to be pushed through the
                * idle queue so they remain in order with respect to each other
@@ -2438,8 +2442,15 @@ public class Edsf.PersonaStore : Folks.PersonaStore
         }
     }
 
+#if HAS_EDS_3_41
   private void _contacts_added_cb (GLib.SList<E.Contact> contacts)
     {
+#else
+  // The binding was using the wrong list type
+  private void _contacts_added_cb (GLib.List<E.Contact> _contacts)
+    {
+      unowned GLib.SList<E.Contact> contacts = (GLib.SList<E.Contact>)_contacts;
+#endif
       GLib.SList<E.Contact> copy = contacts.copy_deep ((GLib.CopyFunc<E.Contact>) GLib.Object.ref);
       this._idle_queue (() => { return this._contacts_added_idle (copy); });
     }
@@ -2511,8 +2522,15 @@ public class Edsf.PersonaStore : Folks.PersonaStore
       return false;
     }
 
+#if HAS_EDS_3_41
   private void _contacts_changed_cb (GLib.SList<E.Contact> contacts)
     {
+#else
+  // The binding was using the wrong list type
+  private void _contacts_changed_cb (GLib.List<E.Contact> _contacts)
+    {
+      unowned GLib.SList<E.Contact> contacts = (GLib.SList<E.Contact>)_contacts;
+#endif
       GLib.SList<E.Contact> copy = contacts.copy_deep ((GLib.CopyFunc<E.Contact>) GLib.Object.ref);
       this._idle_queue (() => { return this._contacts_changed_idle (copy); });
     }
@@ -2539,8 +2557,15 @@ public class Edsf.PersonaStore : Folks.PersonaStore
       return false;
     }
 
+#if HAS_EDS_3_41
   private void _contacts_removed_cb (GLib.SList<string> contacts_ids)
     {
+#else
+  // The binding was using the wrong list type
+  private void _contacts_removed_cb (GLib.List<string> _contacts_ids)
+    {
+      unowned GLib.SList<string> contacts_ids = (GLib.SList<string>)_contacts_ids;
+#endif
       GLib.SList<string> copy = contacts_ids.copy_deep ((GLib.CopyFunc<string>) string.dup);
       this._idle_queue (() => { return this._contacts_removed_idle (copy); });
     }
diff --git a/backends/eds/lib/meson.build b/backends/eds/lib/meson.build
index fd500475..b371f5a0 100644
--- a/backends/eds/lib/meson.build
+++ b/backends/eds/lib/meson.build
@@ -30,6 +30,10 @@ eds_backendlib_doc_deps = [
   '--pkg', libebook_dep.name(),
 ]
 
+if eds_dep.version().version_compare('>3.40')
+  eds_backendlib_vala_flags += ['-D', 'HAS_EDS_3_41']
+endif
+
 eds_backendlib_vala_flags = [
   common_backendlib_vala_flags,
 ]