diff options
Diffstat (limited to 'plugins/power/gpm-common.c')
| -rw-r--r-- | plugins/power/gpm-common.c | 456 |
1 files changed, 456 insertions, 0 deletions
diff --git a/plugins/power/gpm-common.c b/plugins/power/gpm-common.c new file mode 100644 index 0000000..a7ca87f --- /dev/null +++ b/plugins/power/gpm-common.c @@ -0,0 +1,456 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- + * + * Copyright (C) 2005-2011 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 <stdlib.h> +#include <stdio.h> +#include <sys/wait.h> +#include <math.h> +#include <glib.h> +#include <glib/gi18n.h> +#include <gdk/gdkx.h> +#include <X11/extensions/dpms.h> +#include <canberra-gtk.h> + +#define GNOME_DESKTOP_USE_UNSTABLE_API +#include <libgnome-desktop/gnome-rr.h> + +#include "gnome-settings-bus.h" +#include "gpm-common.h" +#include "gsd-power-constants.h" +#include "gsd-power-manager.h" + +#define XSCREENSAVER_WATCHDOG_TIMEOUT 120 /* seconds */ +#define UPS_SOUND_LOOP_ID 99 +#define GSD_POWER_MANAGER_CRITICAL_ALERT_TIMEOUT 5 /* seconds */ + +static int +gsd_power_backlight_convert_safe (int value, int from_range, int to_range) +{ + /* round (value / from_range) * to_range */ + return (value * to_range + from_range / 2) / from_range; +} + +/* take a discrete value with offset and convert to percentage */ +int +gsd_power_backlight_abs_to_percentage (int min, int max, int value) +{ + g_return_val_if_fail (max > min, -1); + g_return_val_if_fail (value >= min, -1); + g_return_val_if_fail (value <= max, -1); + return gsd_power_backlight_convert_safe (value - min, max - min, 100); +} + +/* take a percentage and convert to a discrete value with offset */ +int +gsd_power_backlight_percentage_to_abs (int min, int max, int value) +{ + g_return_val_if_fail (max > min, -1); + g_return_val_if_fail (value >= 0, -1); + g_return_val_if_fail (value <= 100, -1); + + return min + gsd_power_backlight_convert_safe (value, 100, max - min); +} + +#define GPM_UP_TIME_PRECISION 5*60 +#define GPM_UP_TEXT_MIN_TIME 120 + +/** + * Return value: The time string, e.g. "2 hours 3 minutes" + **/ +gchar * +gpm_get_timestring (guint time_secs) +{ + char* timestring = NULL; + gint hours; + gint minutes; + + /* Add 0.5 to do rounding */ + minutes = (int) ( ( time_secs / 60.0 ) + 0.5 ); + + if (minutes == 0) { + timestring = g_strdup (_("Unknown time")); + return timestring; + } + + if (minutes < 60) { + timestring = g_strdup_printf (ngettext ("%i minute", + "%i minutes", + minutes), minutes); + return timestring; + } + + hours = minutes / 60; + minutes = minutes % 60; + if (minutes == 0) + timestring = g_strdup_printf (ngettext ( + "%i hour", + "%i hours", + hours), hours); + else + /* TRANSLATOR: "%i %s %i %s" are "%i hours %i minutes" + * Swap order with "%2$s %2$i %1$s %1$i if needed */ + timestring = g_strdup_printf (_("%i %s %i %s"), + hours, ngettext ("hour", "hours", hours), + minutes, ngettext ("minute", "minutes", minutes)); + return timestring; +} + +static gboolean +parse_vm_kernel_cmdline (gboolean *is_virtual_machine) +{ + gboolean ret = FALSE; + GRegex *regex; + GMatchInfo *match; + char *contents; + char *word; + const char *arg; + + if (!g_file_get_contents ("/proc/cmdline", &contents, NULL, NULL)) + return ret; + + regex = g_regex_new ("gnome.is_vm=(\\S+)", 0, G_REGEX_MATCH_NOTEMPTY, NULL); + if (!g_regex_match (regex, contents, G_REGEX_MATCH_NOTEMPTY, &match)) + goto out; + + word = g_match_info_fetch (match, 0); + g_debug ("Found command-line match '%s'", word); + arg = word + strlen ("gnome.is_vm="); + if (*arg != '0' && *arg != '1') { + g_warning ("Invalid value '%s' for gnome.is_vm passed in kernel command line.\n", arg); + } else { + *is_virtual_machine = atoi (arg); + ret = TRUE; + } + g_free (word); + +out: + g_match_info_free (match); + g_regex_unref (regex); + g_free (contents); + + if (ret) + g_debug ("Kernel command-line parsed to %d", *is_virtual_machine); + + return ret; +} + +gboolean +gsd_power_is_hardware_a_vm (void) +{ + const gchar *str; + gboolean ret = FALSE; + GError *error = NULL; + GVariant *inner; + GVariant *variant = NULL; + GDBusConnection *connection; + + if (parse_vm_kernel_cmdline (&ret)) + return ret; + + connection = g_bus_get_sync (G_BUS_TYPE_SYSTEM, + NULL, + &error); + if (connection == NULL) { + g_warning ("system bus not available: %s", error->message); + g_error_free (error); + goto out; + } + variant = g_dbus_connection_call_sync (connection, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + "org.freedesktop.DBus.Properties", + "Get", + g_variant_new ("(ss)", + "org.freedesktop.systemd1.Manager", + "Virtualization"), + NULL, + G_DBUS_CALL_FLAGS_NONE, + -1, + NULL, + &error); + if (variant == NULL) { + g_debug ("Failed to get property '%s': %s", "Virtualization", error->message); + g_error_free (error); + goto out; + } + + /* on bare-metal hardware this is the empty string, + * otherwise an identifier such as "kvm", "vmware", etc. */ + g_variant_get (variant, "(v)", &inner); + str = g_variant_get_string (inner, NULL); + if (str != NULL && str[0] != '\0') + ret = TRUE; + g_variant_unref (inner); +out: + if (connection != NULL) + g_object_unref (connection); + if (variant != NULL) + g_variant_unref (variant); + return ret; +} + +/* This timer goes off every few minutes, whether the user is idle or not, + to try and clean up anything that has gone wrong. + + It calls disable_builtin_screensaver() so that if xset has been used, + or some other program (like xlock) has messed with the XSetScreenSaver() + settings, they will be set back to sensible values (if a server extension + is in use, messing with xlock can cause the screensaver to never get a wakeup + event, and could cause monitor power-saving to occur, and all manner of + heinousness.) + + This code was originally part of gnome-screensaver, see + http://git.gnome.org/browse/gnome-screensaver/tree/src/gs-watcher-x11.c?id=fec00b12ec46c86334cfd36b37771cc4632f0d4d#n530 + */ +static gboolean +disable_builtin_screensaver (gpointer unused) +{ + int current_server_timeout, current_server_interval; + int current_prefer_blank, current_allow_exp; + int desired_server_timeout, desired_server_interval; + int desired_prefer_blank, desired_allow_exp; + + XGetScreenSaver (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), + ¤t_server_timeout, + ¤t_server_interval, + ¤t_prefer_blank, + ¤t_allow_exp); + + desired_server_timeout = current_server_timeout; + desired_server_interval = current_server_interval; + desired_prefer_blank = current_prefer_blank; + desired_allow_exp = current_allow_exp; + + desired_server_interval = 0; + + /* I suspect (but am not sure) that DontAllowExposures might have + something to do with powering off the monitor as well, at least + on some systems that don't support XDPMS? Who know... */ + desired_allow_exp = AllowExposures; + + /* When we're not using an extension, set the server-side timeout to 0, + so that the server never gets involved with screen blanking, and we + do it all ourselves. (However, when we *are* using an extension, + we tell the server when to notify us, and rather than blanking the + screen, the server will send us an X event telling us to blank.) + */ + desired_server_timeout = 0; + + if (desired_server_timeout != current_server_timeout + || desired_server_interval != current_server_interval + || desired_prefer_blank != current_prefer_blank + || desired_allow_exp != current_allow_exp) { + + g_debug ("disabling server builtin screensaver:" + " (xset s %d %d; xset s %s; xset s %s)", + desired_server_timeout, + desired_server_interval, + (desired_prefer_blank ? "blank" : "noblank"), + (desired_allow_exp ? "expose" : "noexpose")); + + XSetScreenSaver (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), + desired_server_timeout, + desired_server_interval, + desired_prefer_blank, + desired_allow_exp); + + XSync (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), FALSE); + } + + return TRUE; +} + +guint +gsd_power_enable_screensaver_watchdog (void) +{ + int dummy; + guint id; + + /* Make sure that Xorg's DPMS extension never gets in our + * way. The defaults are now applied in Fedora 20 from + * being "0" by default to being "600" by default */ + gdk_x11_display_error_trap_push (gdk_display_get_default ()); + if (DPMSQueryExtension(GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), &dummy, &dummy)) + DPMSSetTimeouts (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), 0, 0, 0); + gdk_x11_display_error_trap_pop_ignored (gdk_display_get_default ()); + id = g_timeout_add_seconds (XSCREENSAVER_WATCHDOG_TIMEOUT, + disable_builtin_screensaver, + NULL); + g_source_set_name_by_id (id, "[gnome-settings-daemon] disable_builtin_screensaver"); + return id; +} + +static gpointer +parse_mock_mock_external_monitor (gpointer data) +{ + const char *mocked_file; + mocked_file = g_getenv ("GSD_MOCK_EXTERNAL_MONITOR_FILE"); + + return g_strdup (mocked_file); +} + +static const gchar * +get_mock_external_monitor_file (void) +{ + static GOnce mocked_once = G_ONCE_INIT; + g_once (&mocked_once, parse_mock_mock_external_monitor, NULL); + return mocked_once.retval; +} + +static gboolean +randr_output_is_on (GnomeRROutput *output) +{ + GnomeRRCrtc *crtc; + + crtc = gnome_rr_output_get_crtc (output); + if (!crtc) + return FALSE; + return gnome_rr_crtc_get_current_mode (crtc) != NULL; +} + +static void +mock_monitor_changed (GFileMonitor *monitor, + GFile *file, + GFile *other_file, + GFileMonitorEvent event_type, + gpointer user_data) +{ + GnomeRRScreen *screen = (GnomeRRScreen *) user_data; + + g_debug ("Mock screen configuration changed"); + g_signal_emit_by_name (G_OBJECT (screen), "changed"); +} + +static void +screen_destroyed (gpointer user_data, + GObject *where_the_object_was) +{ + g_object_unref (G_OBJECT (user_data)); +} + +void +watch_external_monitor (GnomeRRScreen *screen) +{ + const gchar *filename; + GFile *file; + GFileMonitor *monitor; + + filename = get_mock_external_monitor_file (); + if (!filename) + return; + + file = g_file_new_for_commandline_arg (filename); + monitor = g_file_monitor (file, G_FILE_MONITOR_NONE, NULL, NULL); + g_object_unref (file); + g_signal_connect (monitor, "changed", + G_CALLBACK (mock_monitor_changed), screen); + g_object_weak_ref (G_OBJECT (screen), screen_destroyed, monitor); +} + +static gboolean +mock_external_monitor_is_connected (GnomeRRScreen *screen) +{ + char *mock_external_monitor_contents; + const gchar *filename; + + filename = get_mock_external_monitor_file (); + g_assert (filename); + + if (g_file_get_contents (filename, &mock_external_monitor_contents, NULL, NULL)) { + if (mock_external_monitor_contents[0] == '1') { + g_free (mock_external_monitor_contents); + g_debug ("Mock external monitor is on"); + return TRUE; + } else if (mock_external_monitor_contents[0] == '0') { + g_free (mock_external_monitor_contents); + g_debug ("Mock external monitor is off"); + return FALSE; + } + + g_error ("Unhandled value for GSD_MOCK_EXTERNAL_MONITOR contents: %s", mock_external_monitor_contents); + g_free (mock_external_monitor_contents); + } + + return FALSE; +} + +gboolean +external_monitor_is_connected (GnomeRRScreen *screen) +{ + GnomeRROutput **outputs; + guint i; + + if (get_mock_external_monitor_file ()) + return mock_external_monitor_is_connected (screen); + + g_assert (screen != NULL); + + /* see if we have more than one screen plugged in */ + outputs = gnome_rr_screen_list_outputs (screen); + for (i = 0; outputs[i] != NULL; i++) { + if (randr_output_is_on (outputs[i]) && + !gnome_rr_output_is_builtin_display (outputs[i])) + return TRUE; + } + + return FALSE; +} + +static void +play_sound (void) +{ + ca_context_play (ca_gtk_context_get (), UPS_SOUND_LOOP_ID, + CA_PROP_EVENT_ID, "battery-caution", + CA_PROP_EVENT_DESCRIPTION, _("Battery is critically low"), NULL); +} + +static gboolean +play_loop_timeout_cb (gpointer user_data) +{ + play_sound (); + return TRUE; +} + +void +play_loop_start (guint *id) +{ + if (*id != 0) + return; + + *id = g_timeout_add_seconds (GSD_POWER_MANAGER_CRITICAL_ALERT_TIMEOUT, + (GSourceFunc) play_loop_timeout_cb, + NULL); + g_source_set_name_by_id (*id, "[gnome-settings-daemon] play_loop_timeout_cb"); + play_sound (); +} + +void +play_loop_stop (guint *id) +{ + if (*id == 0) + return; + + ca_context_cancel (ca_gtk_context_get (), UPS_SOUND_LOOP_ID); + g_source_remove (*id); + *id = 0; +} |