[134] | 1 | /* |
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| 2 | * Copyright (C) 2008 Red Hat, Inc. |
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| 3 | * |
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| 4 | * This program is free software; you can redistribute it and/or modify |
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| 5 | * it under the terms of the GNU General Public License as published by |
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| 6 | * the Free Software Foundation; either version 2 of the License, or |
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| 7 | * (at your option) any later version. |
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| 8 | * |
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| 9 | * This program is distributed in the hope that it will be useful, |
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 12 | * GNU General Public License for more details. |
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| 13 | * |
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| 14 | * You should have received a copy of the GNU General Public License |
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| 15 | * along with this program; if not, write to the Free Software |
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| 16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 17 | * |
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| 18 | * Written by: Ray Strode <rstrode@redhat.com> |
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| 19 | */ |
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| 20 | |
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| 21 | #include "config.h" |
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| 22 | #include "gdm-timer.h" |
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| 23 | |
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| 24 | #include <stdlib.h> |
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| 25 | #include <stdio.h> |
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| 26 | #include <unistd.h> |
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| 27 | #include <string.h> |
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| 28 | #include <errno.h> |
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| 29 | #include <dirent.h> |
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| 30 | #include <sys/stat.h> |
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| 31 | |
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| 32 | #include <glib.h> |
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| 33 | #include <glib/gi18n.h> |
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| 34 | #include <glib/gstdio.h> |
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| 35 | #include <gtk/gtk.h> |
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| 36 | |
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| 37 | #include "gdm-marshal.h" |
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| 38 | |
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| 39 | #define GDM_TIMER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GDM_TYPE_TIMER, GdmTimerPrivate)) |
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| 40 | |
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| 41 | #ifndef GDM_TIMER_TICKS_PER_SECOND |
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| 42 | #define GDM_TIMER_TICKS_PER_SECOND 60 |
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| 43 | #endif |
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| 44 | |
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| 45 | struct GdmTimerPrivate |
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| 46 | { |
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| 47 | double start_time; |
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| 48 | double duration; |
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| 49 | |
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| 50 | guint tick_timeout_id; |
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| 51 | |
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| 52 | guint is_started : 1; |
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| 53 | }; |
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| 54 | |
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| 55 | enum { |
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| 56 | PROP_0, |
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| 57 | PROP_START_TIME, |
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| 58 | PROP_DURATION, |
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| 59 | PROP_IS_STARTED |
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| 60 | }; |
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| 61 | |
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| 62 | enum { |
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| 63 | TICK, |
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| 64 | STOP, |
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| 65 | NUMBER_OF_SIGNALS |
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| 66 | }; |
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| 67 | |
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| 68 | static guint signals[NUMBER_OF_SIGNALS]; |
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| 69 | |
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| 70 | static void gdm_timer_class_init (GdmTimerClass *klass); |
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| 71 | static void gdm_timer_init (GdmTimer *timer); |
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| 72 | static void gdm_timer_finalize (GObject *object); |
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| 73 | |
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| 74 | static void gdm_timer_queue_next_tick (GdmTimer *timer, |
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| 75 | double when); |
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| 76 | |
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| 77 | G_DEFINE_TYPE (GdmTimer, gdm_timer, G_TYPE_OBJECT) |
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| 78 | |
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| 79 | static void |
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| 80 | gdm_timer_finalize (GObject *object) |
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| 81 | { |
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| 82 | GdmTimer *timer; |
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| 83 | |
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| 84 | timer = GDM_TIMER (object); |
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| 85 | |
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| 86 | gdm_timer_stop (timer); |
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| 87 | |
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| 88 | G_OBJECT_CLASS (gdm_timer_parent_class)->finalize (object); |
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| 89 | } |
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| 90 | |
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| 91 | static void |
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| 92 | gdm_timer_get_property (GObject *object, |
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| 93 | guint prop_id, |
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| 94 | GValue *value, |
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| 95 | GParamSpec *pspec) |
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| 96 | { |
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| 97 | GdmTimer *timer; |
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| 98 | |
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| 99 | timer = GDM_TIMER (object); |
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| 100 | |
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| 101 | switch (prop_id) { |
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| 102 | case PROP_START_TIME: |
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| 103 | g_value_set_double (value, timer->priv->start_time); |
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| 104 | break; |
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| 105 | case PROP_DURATION: |
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| 106 | g_value_set_double (value, timer->priv->duration); |
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| 107 | break; |
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| 108 | case PROP_IS_STARTED: |
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| 109 | g_value_set_boolean (value, timer->priv->is_started); |
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| 110 | break; |
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| 111 | default: |
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| 112 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
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| 113 | break; |
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| 114 | } |
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| 115 | } |
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| 116 | |
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| 117 | static void |
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| 118 | gdm_timer_class_init (GdmTimerClass *klass) |
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| 119 | { |
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| 120 | GObjectClass *object_class; |
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| 121 | |
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| 122 | object_class = G_OBJECT_CLASS (klass); |
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| 123 | |
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| 124 | object_class->finalize = gdm_timer_finalize; |
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| 125 | |
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| 126 | object_class->get_property = gdm_timer_get_property; |
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| 127 | |
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| 128 | signals[TICK] = g_signal_new ("tick", |
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| 129 | G_TYPE_FROM_CLASS (object_class), |
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| 130 | G_SIGNAL_RUN_LAST, |
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| 131 | G_STRUCT_OFFSET (GdmTimerClass, tick), |
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| 132 | NULL, |
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| 133 | NULL, |
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| 134 | gdm_marshal_VOID__DOUBLE, |
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| 135 | G_TYPE_NONE, |
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| 136 | 1, G_TYPE_DOUBLE); |
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| 137 | signals[STOP] = g_signal_new ("stop", |
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| 138 | G_TYPE_FROM_CLASS (object_class), |
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| 139 | G_SIGNAL_RUN_LAST, |
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| 140 | G_STRUCT_OFFSET (GdmTimerClass, stop), |
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| 141 | NULL, |
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| 142 | NULL, |
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| 143 | g_cclosure_marshal_VOID__VOID, |
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| 144 | G_TYPE_NONE, 0); |
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| 145 | |
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| 146 | g_object_class_install_property (object_class, |
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| 147 | PROP_DURATION, |
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| 148 | g_param_spec_double ("duration", |
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| 149 | _("Duration"), |
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| 150 | _("Number of seconds until timer stops"), |
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| 151 | 0.0, G_MAXDOUBLE, 0.0, |
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| 152 | G_PARAM_READABLE)); |
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| 153 | |
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| 154 | g_object_class_install_property (object_class, |
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| 155 | PROP_START_TIME, |
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| 156 | g_param_spec_double ("start-time", |
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| 157 | _("Start time"), |
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| 158 | _("Time the timer was started"), |
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| 159 | 0.0, G_MAXDOUBLE, 0.0, |
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| 160 | G_PARAM_READABLE)); |
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| 161 | |
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| 162 | g_object_class_install_property (object_class, |
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| 163 | PROP_IS_STARTED, |
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| 164 | g_param_spec_boolean ("is-started", |
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| 165 | _("Is it Running?"), |
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| 166 | _("Whether or not the timer " |
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| 167 | "is currently ticking"), |
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| 168 | FALSE, G_PARAM_READABLE)); |
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| 169 | |
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| 170 | |
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| 171 | |
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| 172 | g_type_class_add_private (klass, sizeof (GdmTimerPrivate)); |
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| 173 | } |
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| 174 | |
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| 175 | static void |
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| 176 | gdm_timer_init (GdmTimer *timer) |
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| 177 | { |
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| 178 | timer->priv = GDM_TIMER_GET_PRIVATE (timer); |
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| 179 | } |
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| 180 | |
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| 181 | GdmTimer * |
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| 182 | gdm_timer_new (void) |
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| 183 | { |
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| 184 | GObject *object; |
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| 185 | |
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| 186 | object = g_object_new (GDM_TYPE_TIMER, NULL); |
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| 187 | |
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| 188 | return GDM_TIMER (object); |
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| 189 | } |
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| 190 | |
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| 191 | static double |
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| 192 | get_current_time (void) |
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| 193 | { |
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| 194 | const double microseconds_per_second = 1000000.0; |
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| 195 | double timestamp; |
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| 196 | GTimeVal now; |
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| 197 | |
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| 198 | g_get_current_time (&now); |
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| 199 | |
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| 200 | timestamp = ((microseconds_per_second * now.tv_sec) + now.tv_usec) / |
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| 201 | microseconds_per_second; |
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| 202 | |
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| 203 | return timestamp; |
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| 204 | } |
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| 205 | |
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| 206 | static double |
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| 207 | do_tick (GdmTimer *timer, |
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| 208 | double progress, |
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| 209 | double current_time) |
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| 210 | { |
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| 211 | static const double frequency = 1.0 / GDM_TIMER_TICKS_PER_SECOND; |
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| 212 | double next_tick; |
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| 213 | double time_before_tick; |
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| 214 | double tick_duration; |
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| 215 | |
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| 216 | time_before_tick = current_time; |
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| 217 | g_signal_emit (G_OBJECT (timer), signals[TICK], 0, progress); |
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| 218 | |
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| 219 | current_time = get_current_time (); |
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| 220 | tick_duration = current_time - time_before_tick; |
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| 221 | |
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| 222 | next_tick = MAX (frequency - tick_duration, 0.0); |
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| 223 | |
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| 224 | return next_tick; |
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| 225 | } |
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| 226 | |
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| 227 | static gboolean |
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| 228 | on_tick_timeout (GdmTimer *timer) |
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| 229 | { |
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| 230 | double progress; |
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| 231 | double current_time; |
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| 232 | double elapsed_time; |
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| 233 | double next_tick; |
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| 234 | |
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| 235 | current_time = get_current_time (); |
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| 236 | elapsed_time = current_time - timer->priv->start_time; |
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| 237 | progress = elapsed_time / timer->priv->duration; |
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| 238 | |
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| 239 | timer->priv->tick_timeout_id = 0; |
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| 240 | |
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| 241 | g_object_ref (timer); |
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| 242 | if (progress > 0.999) { |
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| 243 | do_tick (timer, 1.0, current_time); |
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| 244 | if (timer->priv->is_started) { |
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| 245 | gdm_timer_stop (timer); |
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| 246 | } |
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| 247 | } else { |
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| 248 | next_tick = do_tick (timer, progress, current_time); |
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| 249 | if (timer->priv->is_started) { |
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| 250 | gdm_timer_queue_next_tick (timer, next_tick); |
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| 251 | } |
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| 252 | } |
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| 253 | g_object_unref (timer); |
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| 254 | |
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| 255 | return FALSE; |
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| 256 | } |
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| 257 | |
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| 258 | static void |
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| 259 | gdm_timer_queue_next_tick (GdmTimer *timer, |
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| 260 | double when) |
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| 261 | { |
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| 262 | if (timer->priv->tick_timeout_id != 0) { |
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| 263 | return; |
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| 264 | } |
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| 265 | |
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| 266 | if (!timer->priv->is_started) { |
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| 267 | return; |
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| 268 | } |
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| 269 | |
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| 270 | timer->priv->tick_timeout_id = g_timeout_add ((guint) (when * 1000), |
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| 271 | (GSourceFunc) on_tick_timeout, |
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| 272 | timer); |
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| 273 | } |
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| 274 | |
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| 275 | static void |
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| 276 | gdm_timer_set_is_started (GdmTimer *timer, |
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| 277 | gboolean is_started) |
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| 278 | { |
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| 279 | timer->priv->is_started = is_started; |
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| 280 | g_object_notify (G_OBJECT (timer), "is-started"); |
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| 281 | } |
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| 282 | |
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| 283 | void |
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| 284 | gdm_timer_start (GdmTimer *timer, |
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| 285 | double number_of_seconds) |
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| 286 | { |
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| 287 | double next_tick; |
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| 288 | |
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| 289 | g_return_if_fail (GDM_IS_TIMER (timer)); |
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| 290 | g_return_if_fail (number_of_seconds > G_MINDOUBLE); |
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| 291 | g_return_if_fail (!timer->priv->is_started); |
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| 292 | |
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| 293 | timer->priv->start_time = get_current_time (); |
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| 294 | timer->priv->duration = number_of_seconds; |
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| 295 | |
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| 296 | g_assert (timer->priv->tick_timeout_id == 0); |
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| 297 | gdm_timer_set_is_started (timer, TRUE); |
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| 298 | |
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| 299 | g_object_ref (timer); |
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| 300 | next_tick = do_tick (timer, 0.0, timer->priv->start_time); |
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| 301 | gdm_timer_queue_next_tick (timer, next_tick); |
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| 302 | g_object_unref (timer); |
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| 303 | } |
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| 304 | |
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| 305 | void |
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| 306 | gdm_timer_stop (GdmTimer *timer) |
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| 307 | { |
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| 308 | g_return_if_fail (GDM_IS_TIMER (timer)); |
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| 309 | |
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| 310 | if (!timer->priv->is_started) { |
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| 311 | return; |
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| 312 | } |
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| 313 | |
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| 314 | if (timer->priv->tick_timeout_id != 0) { |
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| 315 | g_source_remove (timer->priv->tick_timeout_id); |
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| 316 | timer->priv->tick_timeout_id = 0; |
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| 317 | } |
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| 318 | |
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| 319 | gdm_timer_set_is_started (timer, FALSE); |
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| 320 | g_signal_emit (G_OBJECT (timer), signals[STOP], 0); |
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| 321 | } |
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| 322 | |
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| 323 | gboolean |
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| 324 | gdm_timer_is_started (GdmTimer *timer) |
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| 325 | { |
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| 326 | g_return_val_if_fail (GDM_IS_TIMER (timer), FALSE); |
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| 327 | |
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| 328 | return timer->priv->is_started; |
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| 329 | } |
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