libsysprof-gtk: add session model/item

This makes it easy to get a session instance from inside a .ui file for
binding into listview rows.

src/libsysprof-gtk/sysprof-session-model-item.c

@@ -0,0 +1,155 @@
+/* sysprof-session-model-item.c
+ *
+ * Copyright 2023 Christian Hergert <chergert@redhat.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "config.h"
+
+#include "sysprof-session-model-item.h"
+
+struct _SysprofSessionModelItem
+{
+  GObject         parent_instance;
+  SysprofSession *session;
+  GObject        *item;
+};
+
+enum {
+  PROP_0,
+  PROP_SESSION,
+  PROP_ITEM,
+  N_PROPS
+};
+
+G_DEFINE_FINAL_TYPE (SysprofSessionModelItem, sysprof_session_model_item, G_TYPE_OBJECT)
+
+static GParamSpec *properties [N_PROPS];
+
+static void
+sysprof_session_model_item_dispose (GObject *object)
+{
+  SysprofSessionModelItem *self = (SysprofSessionModelItem *)object;
+
+  g_clear_weak_pointer (&self->session);
+  g_clear_object (&self->item);
+
+  G_OBJECT_CLASS (sysprof_session_model_item_parent_class)->dispose (object);
+}
+
+static void
+sysprof_session_model_item_get_property (GObject    *object,
+                                         guint       prop_id,
+                                         GValue     *value,
+                                         GParamSpec *pspec)
+{
+  SysprofSessionModelItem *self = SYSPROF_SESSION_MODEL_ITEM (object);
+
+  switch (prop_id)
+    {
+    case PROP_SESSION:
+      g_value_set_object (value, sysprof_session_model_item_get_session (self));
+      break;
+
+    case PROP_ITEM:
+      g_value_set_object (value, sysprof_session_model_item_get_item (self));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+sysprof_session_model_item_set_property (GObject      *object,
+                                         guint         prop_id,
+                                         const GValue *value,
+                                         GParamSpec   *pspec)
+{
+  SysprofSessionModelItem *self = SYSPROF_SESSION_MODEL_ITEM (object);
+
+  switch (prop_id)
+    {
+    case PROP_SESSION:
+      g_set_weak_pointer (&self->session, g_value_get_object (value));
+      break;
+
+    case PROP_ITEM:
+      self->item = g_value_dup_object (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+sysprof_session_model_item_class_init (SysprofSessionModelItemClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->dispose = sysprof_session_model_item_dispose;
+  object_class->get_property = sysprof_session_model_item_get_property;
+  object_class->set_property = sysprof_session_model_item_set_property;
+
+  properties[PROP_SESSION] =
+    g_param_spec_object ("session", NULL, NULL,
+                         SYSPROF_TYPE_SESSION,
+                         (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
+
+  properties[PROP_ITEM] =
+    g_param_spec_object ("item", NULL, NULL,
+                         G_TYPE_OBJECT,
+                         (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+}
+
+static void
+sysprof_session_model_item_init (SysprofSessionModelItem *self)
+{
+}
+
+/**
+ * sysprof_session_model_item_get_session:
+ * @self: a #SysprofSessionModelItem
+ *
+ * Returns: (transfer none) (nullable): a #SysprofSession or %NULL
+ */
+SysprofSession *
+sysprof_session_model_item_get_session (SysprofSessionModelItem *self)
+{
+  g_return_val_if_fail (SYSPROF_IS_SESSION_MODEL_ITEM (self), NULL);
+
+  return self->session;
+}
+
+/**
+ * sysprof_session_model_item_get_item:
+ * @self: a #SysprofSessionModelItem
+ *
+ * Gets the underlying item.
+ *
+ * Returns: (transfer none) (nullable) (type GObject): a #GObject or %NULL
+ */
+gpointer
+sysprof_session_model_item_get_item (SysprofSessionModelItem *self)
+{
+  g_return_val_if_fail (SYSPROF_IS_SESSION_MODEL_ITEM (self), NULL);
+
+  return self->item;
+}