[gnome-settings-daemon] power: Split off udev backlight enumeration function

[Bastien Nocera <hadess src gnome org>]

commit 8f367388e0a5015c5f716e11fd1a7cf74b40ab1a
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Jan 23 23:44:12 2013 +0100

    power: Split off udev backlight enumeration function
    
    So that we can use it in the plugin itself.

 plugins/power/Makefile.am            |    2 +
 plugins/power/gsd-backlight-helper.c |   46 +-------------------
 plugins/power/gsd-backlight-linux.c  |   76 ++++++++++++++++++++++++++++++++++
 plugins/power/gsd-backlight-linux.h  |   22 ++++++++++
 4 files changed, 102 insertions(+), 44 deletions(-)
---
diff --git a/plugins/power/Makefile.am b/plugins/power/Makefile.am
index 2397c8a..371e8ba 100644
--- a/plugins/power/Makefile.am
+++ b/plugins/power/Makefile.am
@@ -55,6 +55,8 @@ polkit_policy_DATA = $(polkit_policy_in_files:.policy.in=.policy)
 
 # so it always gets included in the tarball
 gsd_backlight_helper_SOURCES =				\
+	gsd-backlight-linux.c				\
+	gsd-backlight-linux.h				\
 	gsd-backlight-helper.c
 
 libexec_PROGRAMS = gsd-test-power
diff --git a/plugins/power/gsd-backlight-helper.c b/plugins/power/gsd-backlight-helper.c
index 761ef31..86c6a91 100644
--- a/plugins/power/gsd-backlight-helper.c
+++ b/plugins/power/gsd-backlight-helper.c
@@ -30,56 +30,14 @@
 #include <string.h>
 #include <gudev/gudev.h>
 
+#include "gsd-backlight-linux.h"
+
 #define GSD_BACKLIGHT_HELPER_EXIT_CODE_SUCCESS			0
 #define GSD_BACKLIGHT_HELPER_EXIT_CODE_FAILED			1
 #define GSD_BACKLIGHT_HELPER_EXIT_CODE_ARGUMENTS_INVALID	3
 #define GSD_BACKLIGHT_HELPER_EXIT_CODE_INVALID_USER		4
 #define GSD_BACKLIGHT_HELPER_EXIT_CODE_NO_DEVICES		5
 
-static gchar *
-gsd_backlight_helper_get_type (GList *devices, const gchar *type)
-{
-	const gchar *type_tmp;
-	GList *d;
-
-	for (d = devices; d != NULL; d = d->next) {
-		type_tmp = g_udev_device_get_sysfs_attr (d->data, "type");
-		if (g_strcmp0 (type_tmp, type) == 0)
-			return g_strdup (g_udev_device_get_sysfs_path (d->data));
-	}
-	return NULL;
-}
-
-static gchar *
-gsd_backlight_helper_get_best_backlight (void)
-{
-	gchar *path = NULL;
-	GList *devices;
-	GUdevClient *client;
-
-	client = g_udev_client_new (NULL);
-	devices = g_udev_client_query_by_subsystem (client, "backlight");
-	if (devices == NULL)
-		goto out;
-
-	/* search the backlight devices and prefer the types:
-	 * firmware -> platform -> raw */
-	path = gsd_backlight_helper_get_type (devices, "firmware");
-	if (path != NULL)
-		goto out;
-	path = gsd_backlight_helper_get_type (devices, "platform");
-	if (path != NULL)
-		goto out;
-	path = gsd_backlight_helper_get_type (devices, "raw");
-	if (path != NULL)
-		goto out;
-out:
-	g_object_unref (client);
-	g_list_foreach (devices, (GFunc) g_object_unref, NULL);
-	g_list_free (devices);
-	return path;
-}
-
 static gboolean
 gsd_backlight_helper_write (const gchar *filename, gint value, GError **error)
 {
diff --git a/plugins/power/gsd-backlight-linux.c b/plugins/power/gsd-backlight-linux.c
new file mode 100644
index 0000000..f8f91a0
--- /dev/null
+++ b/plugins/power/gsd-backlight-linux.c
@@ -0,0 +1,76 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2010-2011 Richard Hughes <richard hughsie com>
+ *
+ * Licensed under the GNU General Public License Version 2
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+
+#include "gsd-backlight-linux.h"
+
+#ifdef HAVE_GUDEV
+#include <gudev/gudev.h>
+
+static gchar *
+gsd_backlight_helper_get_type (GList *devices, const gchar *type)
+{
+	const gchar *type_tmp;
+	GList *d;
+
+	for (d = devices; d != NULL; d = d->next) {
+		type_tmp = g_udev_device_get_sysfs_attr (d->data, "type");
+		if (g_strcmp0 (type_tmp, type) == 0)
+			return g_strdup (g_udev_device_get_sysfs_path (d->data));
+	}
+	return NULL;
+}
+#endif /* HAVE_GUDEV */
+
+char *
+gsd_backlight_helper_get_best_backlight (void)
+{
+#ifdef HAVE_GUDEV
+	gchar *path = NULL;
+	GList *devices;
+	GUdevClient *client;
+
+	client = g_udev_client_new (NULL);
+	devices = g_udev_client_query_by_subsystem (client, "backlight");
+	if (devices == NULL)
+		goto out;
+
+	/* search the backlight devices and prefer the types:
+	 * firmware -> platform -> raw */
+	path = gsd_backlight_helper_get_type (devices, "firmware");
+	if (path != NULL)
+		goto out;
+	path = gsd_backlight_helper_get_type (devices, "platform");
+	if (path != NULL)
+		goto out;
+	path = gsd_backlight_helper_get_type (devices, "raw");
+	if (path != NULL)
+		goto out;
+out:
+	g_object_unref (client);
+	g_list_foreach (devices, (GFunc) g_object_unref, NULL);
+	g_list_free (devices);
+	return path;
+#endif /* HAVE_GUDEV */
+
+	return NULL;
+}
diff --git a/plugins/power/gsd-backlight-linux.h b/plugins/power/gsd-backlight-linux.h
new file mode 100644
index 0000000..023f392
--- /dev/null
+++ b/plugins/power/gsd-backlight-linux.h
@@ -0,0 +1,22 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2010-2011 Richard Hughes <richard hughsie com>
+ *
+ * Licensed under the GNU General Public License Version 2
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+char *gsd_backlight_helper_get_best_backlight (void);