[dia] object: new utilities for setting up connectionpoints/handles

[Zander Brown <zbrown src gnome org>]

commit 4aab23fab3dc09b06d68276c9121575a1935f60e
Author: Zander Brown <zbrown gnome org>
Date:   Tue Jul 21 02:02:05 2020 +0100

    object: new utilities for setting up connectionpoints/handles

 lib/object.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/object.h | 11 ++++++++++
 2 files changed, 82 insertions(+)
---
diff --git a/lib/object.c b/lib/object.c
index 8bfa365b..8db4b3f6 100644
--- a/lib/object.c
+++ b/lib/object.c
@@ -1795,3 +1795,74 @@ dia_object_transform (DiaObject       *self,
 
   return self->ops->transform (self, m);
 }
+
+
+/**
+ * dia_object_add_handle:
+ * @self: the #DiaObject
+ * @handle: the #Handle to register
+ * @index: the index of @handle
+ * @id: the #HandleId of @handle
+ * @type: the #HandleType of @handle
+ * @connect_type: the @HandleConnectType of @handle
+ *
+ * Register @handle with @self, for use in object creation
+ *
+ * This SHOULD NOT be called on arbitary objects
+ *
+ * Stability: Stable
+ *
+ * Since: 0.98
+ */
+void
+dia_object_add_handle (DiaObject               *self,
+                       Handle                  *handle,
+                       int                      index,
+                       HandleId                 id,
+                       HandleType               type,
+                       HandleConnectType        connect_type)
+{
+  g_return_if_fail (self != NULL);
+  g_return_if_fail (handle != NULL);
+  g_return_if_fail (index >= 0 && index < self->num_handles);
+
+  self->handles[index] = handle;
+
+  handle->id = id;
+  handle->type = type;
+  handle->connect_type = connect_type;
+  handle->connected_to = NULL;
+}
+
+
+/**
+ * dia_object_add_connection_point:
+ * @self: the #DiaObject
+ * @cp: the #ConnectionPoint to register
+ * @index: the index of @cp
+ * @flags: the #ConnectionPointFlags for flags
+ *
+ * Register @cp with @self, for use in object creation
+ *
+ * This SHOULD NOT be called on arbitary objects
+ *
+ * Stability: Stable
+ *
+ * Since: 0.98
+ */
+void
+dia_object_add_connection_point (DiaObject            *self,
+                                 ConnectionPoint      *cp,
+                                 int                   index,
+                                 ConnectionPointFlags  flags)
+{
+  g_return_if_fail (self != NULL);
+  g_return_if_fail (cp != NULL);
+  g_return_if_fail (index >= 0 && index < self->num_connections);
+
+  self->connections[index] = cp;
+
+  cp->object = self;
+  cp->connected = NULL;
+  cp->flags = flags;
+}
diff --git a/lib/object.h b/lib/object.h
index 28ffbcf3..0ffff0ef 100644
--- a/lib/object.h
+++ b/lib/object.h
@@ -498,6 +498,17 @@ gboolean               dia_object_edit_text           (DiaObject              *s
                                                        gchar                  *textchange);
 gboolean               dia_object_transform           (DiaObject              *self,
                                                        const DiaMatrix        *m);
+void                   dia_object_add_handle           (DiaObject               *self,
+                                                        Handle                  *handle,
+                                                        int                      index,
+                                                        HandleId                 id,
+                                                        HandleType               type,
+                                                        HandleConnectType        connect_type);
+void                   dia_object_add_connection_point (DiaObject               *self,
+                                                        ConnectionPoint         *cp,
+                                                        int                      index,
+                                                        ConnectionPointFlags     flags);
+
 
 gboolean       dia_object_defaults_load (const gchar *filename,
                                          gboolean create_lazy,