[gnome-builder] libide/tweaks: handle NULL gracefully in entry bindings

[Christian Hergert <chergert src gnome org>]

commit 7e81ce2f2465d6d5b7a3ab21cf2ead6e12ad6151
Author: Christian Hergert <chergert redhat com>
Date:   Thu Aug 25 09:54:19 2022 -0700

    libide/tweaks: handle NULL gracefully in entry bindings

 src/libide/tweaks/ide-tweaks-entry.c | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)
---
diff --git a/src/libide/tweaks/ide-tweaks-entry.c b/src/libide/tweaks/ide-tweaks-entry.c
index 822e17d27..13e472e58 100644
--- a/src/libide/tweaks/ide-tweaks-entry.c
+++ b/src/libide/tweaks/ide-tweaks-entry.c
@@ -42,6 +42,30 @@ G_DEFINE_FINAL_TYPE (IdeTweaksEntry, ide_tweaks_entry, IDE_TYPE_TWEAKS_WIDGET)
 
 static GParamSpec *properties [N_PROPS];
 
+static gboolean
+get_transform (const GValue *from_value,
+               GValue       *to_value,
+               gpointer      user_data)
+{
+  if (g_value_get_string (from_value) == NULL)
+    g_value_set_static_string (to_value, "");
+  else
+    g_value_copy (from_value, to_value);
+
+  return TRUE;
+}
+
+static gboolean
+set_transform (const GValue *from_value,
+               GValue       *to_value,
+               gpointer      user_data)
+{
+  if (!ide_str_empty0 (g_value_get_string (from_value)))
+    g_value_copy (from_value, to_value);
+
+  return TRUE;
+}
+
 static GtkWidget *
 ide_tweaks_entry_create_for_item (IdeTweaksWidget *widget,
                                   IdeTweaksItem   *item)
@@ -58,7 +82,9 @@ ide_tweaks_entry_create_for_item (IdeTweaksWidget *widget,
                       NULL);
 
   if ((binding = ide_tweaks_widget_get_binding (IDE_TWEAKS_WIDGET (info))))
-    ide_tweaks_binding_bind (binding, row, "text");
+    ide_tweaks_binding_bind_with_transform (binding, row, "text",
+                                            get_transform, set_transform,
+                                            NULL, NULL);
 
   return GTK_WIDGET (row);
 }