Add new object that will monitor HAL and act as a factory for displays.

2007-08-02  William Jon McCann  <mccann@jhu.edu>

	* daemon/Makefile.am:
	* daemon/gdm-local-display-factory.c:
	(gdm_local_display_factory_error_quark), (get_pci_seat_devices),
	(gdm_local_display_factory_start),
	(gdm_local_display_factory_stop),
	(gdm_local_display_factory_set_display_store),
	(gdm_local_display_factory_set_property),
	(gdm_local_display_factory_get_property),
	(gdm_local_display_factory_class_init), (connect_to_hal),
	(disconnect_from_hal), (gdm_local_display_factory_init),
	(gdm_local_display_factory_finalize),
	(gdm_local_display_factory_new):
	* daemon/gdm-local-display-factory.h:
	* daemon/gdm-manager.c: (gdm_manager_start),
	(gdm_manager_set_wait_for_go), (gdm_manager_constructor):
	Add new object that will monitor HAL and act as a factory
	for displays.


svn path=/branches/mccann-gobject/; revision=5125

1 files changed, 334 insertions, 0 deletions

diff --git a/daemon/gdm-local-display-factory.c b/daemon/gdm-local-display-factory.c
new file mode 100644
index 00000000..2c9febe6
--- /dev/null
+++ b/daemon/gdm-local-display-factory.c
@@ -0,0 +1,334 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2007 William Jon McCann <mccann@jhu.edu>
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <glib-object.h>
+
+#include "gdm-local-display-factory.h"
+#include "gdm-display-store.h"
+#include "gdm-static-display.h"
+#include "gdm-static-factory-display.h"
+
+#define GDM_LOCAL_DISPLAY_FACTORY_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GDM_TYPE_LOCAL_DISPLAY_FACTORY, GdmLocalDisplayFactoryPrivate))
+
+#define HAL_DBUS_NAME                           "org.freedesktop.Hal"
+#define HAL_DBUS_MANAGER_PATH                   "/org/freedesktop/Hal/Manager"
+#define HAL_DBUS_MANAGER_INTERFACE              "org.freedesktop.Hal.Manager"
+#define HAL_DBUS_DEVICE_INTERFACE               "org.freedesktop.Hal.Device"
+#define SEAT_PCI_DEVICE_CLASS                   3
+
+struct GdmLocalDisplayFactoryPrivate
+{
+	GdmDisplayStore *display_store;
+
+	DBusGConnection *connection;
+	DBusGProxy      *proxy;
+
+};
+
+enum {
+	DISPLAY_ADDED,
+	DISPLAY_REMOVED,
+	LAST_SIGNAL
+};
+
+enum {
+	PROP_0,
+	PROP_DISPLAY_STORE,
+};
+
+static guint signals [LAST_SIGNAL] = { 0, };
+
+static void	gdm_local_display_factory_class_init	(GdmLocalDisplayFactoryClass *klass);
+static void	gdm_local_display_factory_init	        (GdmLocalDisplayFactory      *factory);
+static void	gdm_local_display_factory_finalize	(GObject	             *object);
+
+static gpointer local_display_factory_object = NULL;
+
+G_DEFINE_TYPE (GdmLocalDisplayFactory, gdm_local_display_factory, G_TYPE_OBJECT)
+
+GQuark
+gdm_local_display_factory_error_quark (void)
+{
+	static GQuark ret = 0;
+	if (ret == 0) {
+		ret = g_quark_from_static_string ("gdm_local_display_factory_error");
+	}
+
+	return ret;
+}
+
+static void
+get_pci_seat_devices (GdmLocalDisplayFactory *factory,
+		      GList                  *seats)
+{
+	char      **devices;
+	const char *key;
+	const char *value;
+	GError     *error;
+	gboolean    res;
+	int         i;
+
+	g_debug ("Getting PCI seat devices");
+
+	key = "info.bus";
+	value = "pci";
+
+	devices = NULL;
+	error = NULL;
+        res = dbus_g_proxy_call (factory->priv->proxy,
+				 "FindDeviceStringMatch",
+				 &error,
+                                 G_TYPE_STRING, key,
+                                 G_TYPE_STRING, value,
+                                 G_TYPE_INVALID,
+                                 G_TYPE_STRV, &devices,
+                                 G_TYPE_INVALID);
+	if (! res) {
+		g_warning ("Unable to query HAL: %s", error->message);
+		g_error_free (error);
+	}
+
+	/* now look for pci class 3 */
+	key = "pci.device_class";
+	for (i = 0; devices [i] != NULL; i++) {
+		DBusGProxy *device_proxy;
+		int         class_val;
+
+		device_proxy = dbus_g_proxy_new_for_name (factory->priv->connection,
+							  HAL_DBUS_NAME,
+							  devices [i],
+							  HAL_DBUS_DEVICE_INTERFACE);
+		if (device_proxy == NULL) {
+			continue;
+		}
+
+		res = dbus_g_proxy_call (device_proxy,
+					 "GetPropertyInteger",
+					 &error,
+					 G_TYPE_STRING, key,
+					 G_TYPE_INVALID,
+					 G_TYPE_INT, &class_val,
+					 G_TYPE_INVALID);
+		if (class_val == SEAT_PCI_DEVICE_CLASS) {
+			g_debug ("Found device: %s", devices [i]);
+			seats = g_list_prepend (seats, devices [i]);
+		}
+
+		g_object_unref (device_proxy);
+	}
+
+	g_strfreev (devices);
+}
+
+gboolean
+gdm_local_display_factory_start (GdmLocalDisplayFactory *factory,
+				 GError                **error)
+{
+	gboolean    ret;
+	GdmDisplay *display;
+
+	g_return_val_if_fail (GDM_IS_LOCAL_DISPLAY_FACTORY (factory), FALSE);
+
+	ret = TRUE;
+
+	/* FIXME: */
+
+	display = gdm_static_display_new (0);
+	if (display == NULL) {
+		g_warning ("Unable to create display: %d", 0);
+		return FALSE;
+	}
+
+	gdm_display_store_add (factory->priv->display_store, display);
+	/* let store own the ref */
+	g_object_unref (display);
+
+	if (! gdm_display_manage (display)) {
+		gdm_display_unmanage (display);
+	}
+
+	return ret;
+}
+
+gboolean
+gdm_local_display_factory_stop (GdmLocalDisplayFactory *factory,
+				GError                **error)
+{
+	g_return_val_if_fail (GDM_IS_LOCAL_DISPLAY_FACTORY (factory), FALSE);
+
+	return TRUE;
+}
+
+static void
+gdm_local_display_factory_set_display_store (GdmLocalDisplayFactory *factory,
+					     GdmDisplayStore        *display_store)
+{
+	if (factory->priv->display_store != NULL) {
+		g_object_unref (factory->priv->display_store);
+		factory->priv->display_store = NULL;
+	}
+
+	if (display_store != NULL) {
+		factory->priv->display_store = g_object_ref (display_store);
+	}
+}
+
+static void
+gdm_local_display_factory_set_property (GObject	      *object,
+					guint	       prop_id,
+					const GValue  *value,
+					GParamSpec    *pspec)
+{
+	GdmLocalDisplayFactory *self;
+
+	self = GDM_LOCAL_DISPLAY_FACTORY (object);
+
+	switch (prop_id) {
+	case PROP_DISPLAY_STORE:
+		gdm_local_display_factory_set_display_store (self, g_value_get_object (value));
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+		break;
+	}
+}
+
+static void
+gdm_local_display_factory_get_property (GObject	   *object,
+					guint  	    prop_id,
+					GValue	   *value,
+					GParamSpec *pspec)
+{
+	GdmLocalDisplayFactory *self;
+
+	self = GDM_LOCAL_DISPLAY_FACTORY (object);
+
+	switch (prop_id) {
+	case PROP_DISPLAY_STORE:
+		g_value_set_object (value, self->priv->display_store);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+		break;
+	}
+}
+
+static void
+gdm_local_display_factory_class_init (GdmLocalDisplayFactoryClass *klass)
+{
+	GObjectClass   *object_class = G_OBJECT_CLASS (klass);
+
+	object_class->get_property = gdm_local_display_factory_get_property;
+	object_class->set_property = gdm_local_display_factory_set_property;
+	object_class->finalize = gdm_local_display_factory_finalize;
+
+        g_object_class_install_property (object_class,
+                                         PROP_DISPLAY_STORE,
+                                         g_param_spec_object ("display-store",
+							      "display store",
+							      "display store",
+							      GDM_TYPE_DISPLAY_STORE,
+							      G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
+
+	g_type_class_add_private (klass, sizeof (GdmLocalDisplayFactoryPrivate));
+}
+
+static gboolean
+connect_to_hal (GdmLocalDisplayFactory *factory)
+{
+	GError *error;
+
+	error = NULL;
+	factory->priv->connection = dbus_g_bus_get (DBUS_BUS_SYSTEM, &error);
+	if (factory->priv->connection == NULL) {
+		g_critical ("Couldn't connect to system bus: %s",
+			   error->message);
+		g_error_free (error);
+
+		return FALSE;
+	}
+
+        factory->priv->proxy = dbus_g_proxy_new_for_name (factory->priv->connection,
+							  HAL_DBUS_NAME,
+							  HAL_DBUS_MANAGER_PATH,
+							  HAL_DBUS_MANAGER_INTERFACE);
+	if (factory->priv->proxy == NULL) {
+		g_warning ("Couldn't create proxy for HAL Manager");
+		return FALSE;
+	}
+
+	return TRUE;
+}
+
+static void
+disconnect_from_hal (GdmLocalDisplayFactory *factory)
+{
+	if (factory->priv->proxy == NULL) {
+		g_object_unref (factory->priv->proxy);
+	}
+}
+
+static void
+gdm_local_display_factory_init (GdmLocalDisplayFactory *factory)
+{
+	factory->priv = GDM_LOCAL_DISPLAY_FACTORY_GET_PRIVATE (factory);
+
+	connect_to_hal (factory);
+}
+
+static void
+gdm_local_display_factory_finalize (GObject *object)
+{
+	GdmLocalDisplayFactory *factory;
+
+	g_return_if_fail (object != NULL);
+	g_return_if_fail (GDM_IS_LOCAL_DISPLAY_FACTORY (object));
+
+	factory = GDM_LOCAL_DISPLAY_FACTORY (object);
+
+	g_return_if_fail (factory->priv != NULL);
+
+	disconnect_from_hal (factory);
+
+	G_OBJECT_CLASS (gdm_local_display_factory_parent_class)->finalize (object);
+}
+
+GdmLocalDisplayFactory *
+gdm_local_display_factory_new (GdmDisplayStore *store)
+{
+	if (local_display_factory_object != NULL) {
+		g_object_ref (local_display_factory_object);
+	} else {
+		local_display_factory_object = g_object_new (GDM_TYPE_LOCAL_DISPLAY_FACTORY,
+							     "display-store", store,
+							     NULL);
+		g_object_add_weak_pointer (local_display_factory_object,
+					   (gpointer *) &local_display_factory_object);
+	}
+
+	return GDM_LOCAL_DISPLAY_FACTORY (local_display_factory_object);
+}