vcs.maemo.org Git - flashlight-appl/blob - src/flashlight_applet.c

   1 /*
   2  *  Flashlight applet (widget) for Maemo.
   3  *  Copyright (C) 2009, 2010 Roman Moravcik
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <glib.h>
  27 #include <gtk/gtk.h>
  28 #include <hildon/hildon.h>
  29 #include <glib/gi18n-lib.h>
  30 #include <libhal.h>
  31 #include <dbus/dbus.h>
  32
  33 #include <libosso.h>
  34
  35 #include "flashlight_applet.h"
  36 #include "flashlight_lib.h"
  37
  38 #define MSG_FLASHLIGHT_ON _("On")
  39 #define MSG_FLASHLIGHT_OFF _("Off")
  40
  41 #define ICON_FLASHLIGHT_ON "statusarea_flashlight_on"
  42 #define ICON_FLASHLIGHT_OFF "statusarea_flashlight_off"
  43
  44 #define CAM_COVER_UDI "/org/freedesktop/Hal/devices/platform_cam_shutter"
  45 #define CAM_COVER_STATE "button.state.value"
  46
  47 #define FLASHLIGHT_APPLET_SERVICE "org.maemo.flashlight_applet"
  48 #define FLASHLIGHT_APPLET_OBJECT "/org/maemo/flashlight_applet"
  49 #define FLASHLIGHT_APPLET_IFACE "org.maemo.flashlight_applet"
  50
  51 #define FLASHLIGHT_APPLET_METHOD_ENABLE "enable"
  52 #define FLASHLIGHT_APPLET_METHOD_DISABLE "disable"
  53
  54 #define _CAMERAUI(str) dgettext("osso-camera-ui",str)
  55
  56 #define FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE (obj,   \
  57                             TYPE_FLASHLIGHT_STATUS_PLUGIN, FlashlightPluginPrivate))
  58
  59 struct _FlashlightPluginPrivate
  60 {
  61         GtkWidget *button;
  62         guint status_timer;
  63
  64         FlashlightContext_t *flashlight;
  65         DBusConnection *dbus_connection;
  66         LibHalContext *hal;
  67         osso_context_t *osso_context;
  68 };
  69
  70 HD_DEFINE_PLUGIN_MODULE (FlashlightPlugin, flashlight_status_plugin, HD_TYPE_STATUS_MENU_ITEM)
  71
  72 static gboolean flashlight_status_plugin_status (gpointer data);
  73 static void flashlight_status_plugin_finalize (GObject *object);
  74
  75 static void
  76 flashlight_status_plugin_show_notification (FlashlightPlugin *plugin,
  77                                             const gchar *text)
  78 {
  79         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
  80         GtkWidget *banner;
  81
  82         g_return_if_fail (priv);
  83         g_return_if_fail (priv->button);
  84
  85         banner = hildon_banner_show_information (GTK_WIDGET (priv->button), NULL, text);
  86         hildon_banner_set_timeout (HILDON_BANNER (banner), 3000);
  87 }
  88
  89 static void
  90 flashlight_status_plugin_enable (FlashlightPlugin *plugin,
  91                                  gboolean enable)
  92 {
  93         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
  94
  95         g_return_if_fail (priv);
  96         g_return_if_fail (priv->button);
  97
  98         if (enable) {
  99                 if (flashlight_open (priv->flashlight, "/dev/video0") < 0) {
 100                         flashlight_status_plugin_show_notification (plugin,
 101                                 _("Unable to initialize flashlight.\nCamera in use by another application."));
 102                         flashlight_close (priv->flashlight);
 103                         return;
 104                 }
 105
 106                 if (flashlight_set_intensity (priv->flashlight, 1) < 0) {
 107                         flashlight_status_plugin_show_notification (plugin,
 108                                 _("Unable to turn on flashlight."));
 109                         flashlight_close (priv->flashlight);
 110                         return;
 111                 }
 112
 113                 hildon_button_set_value (HILDON_BUTTON (priv->button), MSG_FLASHLIGHT_ON);
 114                 hildon_button_set_image (HILDON_BUTTON (priv->button),
 115                                          gtk_image_new_from_icon_name (ICON_FLASHLIGHT_ON, -1));
 116
 117                 /* check status of controller every 1s */
 118                 priv->status_timer = g_timeout_add (1000, flashlight_status_plugin_status, plugin);
 119         } else {
 120                 /* cancel status timer */
 121                 if (priv->status_timer) {
 122                         g_source_remove (priv->status_timer);
 123                         priv->status_timer = 0;
 124                 }
 125
 126                 /* set intensity to 0 */
 127                 if (flashlight_set_intensity (priv->flashlight, 0) < 0) {
 128                         flashlight_status_plugin_show_notification (plugin,
 129                                 _("Unable to turn off flashlight."));
 130                         return;
 131                 }
 132
 133                 if (flashlight_close (priv->flashlight) < 0) {
 134                         return;
 135                 }
 136
 137                 hildon_button_set_value (HILDON_BUTTON (priv->button), MSG_FLASHLIGHT_OFF);
 138                 hildon_button_set_image (HILDON_BUTTON (priv->button),
 139                                          gtk_image_new_from_icon_name (ICON_FLASHLIGHT_OFF, -1));
 140         }
 141 }
 142
 143 static gint
 144 flashlight_applet_dbus_request_handler (const gchar *interface,
 145                                         const gchar *method,
 146                                         GArray *arguments,
 147                                         gpointer data,
 148                                         osso_rpc_t *retval)
 149 {
 150         FlashlightPlugin *plugin = data;
 151         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 152         gboolean is_open = FALSE;
 153
 154         g_return_val_if_fail (interface, OSSO_ERROR);
 155         g_return_val_if_fail (method, OSSO_ERROR);
 156
 157         g_return_val_if_fail (priv, OSSO_ERROR);
 158         g_return_val_if_fail (priv->hal, OSSO_ERROR);
 159         g_return_val_if_fail (priv->button, OSSO_ERROR);
 160
 161         if (strcmp (interface, FLASHLIGHT_APPLET_IFACE))
 162                 return OSSO_ERROR;
 163
 164         is_open = !libhal_device_get_property_bool (priv->hal, CAM_COVER_UDI, CAM_COVER_STATE, NULL);
 165
 166         if (!strcmp (method, FLASHLIGHT_APPLET_METHOD_ENABLE)) {
 167                 /* check if cover is open */
 168                 if (is_open) {
 169                         /* try to enable flashlight, only if it's disabled */
 170                         if (!strcmp (hildon_button_get_value (HILDON_BUTTON (priv->button)), MSG_FLASHLIGHT_OFF)) {
 171                                 flashlight_status_plugin_enable (plugin, TRUE);
 172                         }
 173                 } else {
 174                         flashlight_status_plugin_show_notification (plugin, _CAMERAUI ("camera_ia_open_lens_cover"));
 175                 }
 176         } else if (!strcmp (method, FLASHLIGHT_APPLET_METHOD_DISABLE)) {
 177                 if (is_open) {
 178                         /* try to disable flashlight, only if it's enabled */
 179                         if (!strcmp (hildon_button_get_value (HILDON_BUTTON (priv->button)), MSG_FLASHLIGHT_ON)) {
 180                                 flashlight_status_plugin_enable (plugin, FALSE);
 181                         }
 182                 }
 183         } else {
 184                 return OSSO_ERROR;
 185         }
 186
 187         return OSSO_OK;
 188 }
 189
 190 static void
 191 flashlight_status_plugin_on_hal_property_modified (LibHalContext *ctx,
 192                                                    const char *udi,
 193                                                    const char *key,
 194                                                    dbus_bool_t is_removed,
 195                                                    dbus_bool_t is_added)
 196 {
 197         FlashlightPlugin *plugin = libhal_ctx_get_user_data (ctx);
 198         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 199         gboolean is_open = FALSE;
 200         int intensity = 0;
 201
 202         g_return_if_fail (priv);
 203
 204         if (strcmp (udi, CAM_COVER_UDI) != 0)
 205                 return;
 206
 207         if (strcmp (key, CAM_COVER_STATE) != 0)
 208                 return;
 209
 210         is_open = !libhal_device_get_property_bool (ctx, udi, key, NULL);
 211
 212         if (is_open) {
 213                 /* show widget */
 214                 gtk_widget_show_all (GTK_WIDGET (plugin));
 215         } else {
 216                 /* turn off flashlight if flashlight is enabled */
 217                 if (flashlight_get_intensity (priv->flashlight, &intensity) == 0) {
 218                         if (intensity > 0) {
 219                                 flashlight_status_plugin_enable (plugin, FALSE);
 220                         }
 221                 }
 222
 223                 /* hide widget */
 224                 gtk_widget_hide_all (GTK_WIDGET (plugin));
 225         }
 226 }
 227
 228 static gboolean
 229 flashlight_status_plugin_status (gpointer data)
 230 {
 231         FlashlightPlugin *plugin = data;
 232         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 233         int status = 0;
 234
 235         if (flashlight_get_status (priv->flashlight, &status) < 0) {
 236                 flashlight_status_plugin_show_notification (plugin,
 237                                                             _("Unable to read status from driver."));
 238                 return FALSE;
 239         }
 240
 241         /* ops, something is wrong */
 242         if (status) {
 243                 /* turn off flashlight */
 244                 flashlight_status_plugin_enable (plugin, FALSE);
 245
 246                 if (status & FLASHLIGHT_STATUS_SHORT_CIRCUT_FAULT) {
 247                         flashlight_status_plugin_show_notification (plugin,
 248                                 _("Short-circut fault detected!\nTurning off flashlight."));
 249                 } else if (status & FLASHLIGHT_STATUS_OVERTEMPERATURE_FAULT) {
 250                         flashlight_status_plugin_show_notification (plugin,
 251                                 _("Overtemperature fault detected!\nTurning off flashlight."));
 252                 } else if (status & FLASHLIGHT_STATUS_TIMEOUT_FAULT) {
 253                         flashlight_status_plugin_show_notification (plugin,
 254                                 _("Timeout fault detected!\nTurning off flashlight."));
 255                 } else if (status & FLASHLIGHT_STATUS_OVERVOLTAGE_FAULT) {
 256                         flashlight_status_plugin_show_notification (plugin,
 257                                 _("Overvoltage fault detected!\nTurning off flashlight."));
 258                 }
 259         }
 260
 261         return TRUE;
 262 }
 263
 264 static void
 265 flashlight_status_plugin_on_clicked (HildonButton *button,
 266                                      gpointer data)
 267 {
 268         FlashlightPlugin *plugin = data;
 269         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 270
 271         g_return_if_fail (priv);
 272
 273         if (!strcmp (hildon_button_get_value (button), MSG_FLASHLIGHT_ON)) {
 274                 flashlight_status_plugin_enable (plugin, FALSE);
 275         } else {
 276                 flashlight_status_plugin_enable (plugin, TRUE);
 277         }
 278 }
 279
 280 static GtkWidget *
 281 flashlight_status_plugin_ui (FlashlightPlugin *plugin)
 282 {
 283         GtkWidget *button;
 284
 285         g_return_val_if_fail (plugin, NULL);
 286
 287         button = hildon_button_new (HILDON_SIZE_FINGER_HEIGHT, HILDON_BUTTON_ARRANGEMENT_VERTICAL);
 288         gtk_button_set_alignment (GTK_BUTTON (button), 0.0, 0.5);
 289         hildon_button_set_title (HILDON_BUTTON (button), _("Flashlight"));
 290         hildon_button_set_value (HILDON_BUTTON (button), MSG_FLASHLIGHT_OFF);
 291         hildon_button_set_image (HILDON_BUTTON (button),
 292                                  gtk_image_new_from_icon_name (ICON_FLASHLIGHT_OFF, -1));
 293         hildon_button_set_image_position (HILDON_BUTTON (button), GTK_POS_LEFT);
 294
 295         g_signal_connect (button, "clicked",
 296                                         G_CALLBACK (flashlight_status_plugin_on_clicked), plugin);
 297
 298         return button;
 299 }
 300
 301 static void
 302 flashlight_status_plugin_class_init (FlashlightPluginClass *class)
 303 {
 304         GObjectClass *object_class = G_OBJECT_CLASS (class);
 305
 306         object_class->finalize = flashlight_status_plugin_finalize;
 307
 308         g_type_class_add_private (class, sizeof (FlashlightPluginPrivate));
 309 }
 310
 311 static void
 312 flashlight_status_plugin_class_finalize (FlashlightPluginClass *class)
 313 {
 314 }
 315
 316 static void
 317 flashlight_status_plugin_init (FlashlightPlugin *plugin)
 318 {
 319         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 320         DBusError error;
 321
 322         /* initialize osso */
 323         priv->osso_context = osso_initialize (PACKAGE, VERSION, TRUE, NULL);
 324         if (!priv->osso_context) {
 325                 g_critical ("flashlight_status_plugin_init: Could not initialize OSSO\n");
 326                 return;
 327         }
 328
 329         if (osso_rpc_set_cb_f (priv->osso_context,
 330                                FLASHLIGHT_APPLET_SERVICE,
 331                                FLASHLIGHT_APPLET_OBJECT,
 332                                FLASHLIGHT_APPLET_IFACE,
 333                                flashlight_applet_dbus_request_handler, plugin) != OSSO_OK) {
 334                 g_critical ("flashlight_status_plugin_init: Unable to register D-BUS request handler\n");
 335                 return;
 336         }
 337
 338         /* initialize dbus */
 339         dbus_error_init (&error);
 340         priv->dbus_connection = dbus_bus_get (DBUS_BUS_SYSTEM, &error);
 341         if (dbus_error_is_set (&error)) {
 342                 g_critical ("flashlight_status_plugin_init: Could not get the system DBus connection, %s",
 343                             error.message);
 344                 dbus_error_free (&error);
 345                 return;
 346         }
 347
 348         /* initialize flashlight */
 349         if (flashlight_init (&priv->flashlight) < 0) {
 350                 g_critical ("flashlight_status_plugin_init: Unable to create Flashlight context\n");
 351                 return;
 352         }
 353
 354         /* initialize hal */
 355         priv->hal = libhal_ctx_new ();
 356         if (!priv->hal) {
 357                 g_critical ("flashlight_status_plugin_init: Unable to create HAL context\n");
 358                 return;
 359         }
 360
 361         libhal_ctx_set_dbus_connection (priv->hal, priv->dbus_connection);
 362         libhal_ctx_set_user_data (priv->hal, plugin);
 363         libhal_ctx_set_device_property_modified (priv->hal,
 364                                                  flashlight_status_plugin_on_hal_property_modified);
 365
 366         if (!libhal_ctx_init (priv->hal, &error)) {
 367                 if (dbus_error_is_set (&error)) {
 368                         g_critical ("Could not initialize the HAL context, %s",
 369                                     error.message);
 370                         dbus_error_free (&error);
 371                 } else {
 372                         g_critical ("Could not initialize the HAL context, "
 373                                     "no error, is hald running?");
 374                 }
 375                 libhal_ctx_set_user_data (priv->hal, NULL);
 376                 libhal_ctx_free (priv->hal);
 377                 priv->hal = NULL;
 378                 return;
 379         }
 380
 381         libhal_device_add_property_watch (priv->hal, CAM_COVER_UDI, NULL);
 382
 383         /* create plugin ui */
 384         priv->button = flashlight_status_plugin_ui (plugin);
 385         gtk_container_add (GTK_CONTAINER (plugin), priv->button);
 386
 387         /* show widget if camera cover is open */
 388         if ( !libhal_device_get_property_bool (priv->hal, CAM_COVER_UDI, CAM_COVER_STATE, NULL))
 389                 gtk_widget_show_all (GTK_WIDGET (plugin));
 390
 391 }
 392
 393 static void
 394 flashlight_status_plugin_finalize (GObject *object)
 395 {
 396         FlashlightPlugin *plugin = FLASHLIGHT_STATUS_PLUGIN (object);
 397         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 398
 399         g_return_if_fail (priv);
 400
 401         /* deinitialize hal */
 402         if (priv->hal) {
 403                 libhal_device_remove_property_watch (priv->hal, CAM_COVER_UDI, NULL);
 404                 libhal_ctx_set_user_data (priv->hal, NULL);
 405                 libhal_ctx_shutdown (priv->hal, NULL);
 406                 libhal_ctx_free (priv->hal);
 407         }
 408         priv->hal = NULL;
 409
 410         /* unreference dbus connection */
 411         if (priv->dbus_connection) {
 412                 dbus_connection_unref (priv->dbus_connection);
 413         }
 414         priv->dbus_connection = NULL;
 415
 416         /* cancel status timer */
 417         if (priv->status_timer) {
 418                 g_source_remove (priv->status_timer);
 419         }
 420         priv->status_timer = 0;
 421
 422         /* deinitialize flashlight */
 423         if (priv->flashlight) {
 424                 flashlight_deinit (priv->flashlight);
 425         }
 426         priv->flashlight = NULL;
 427
 428         /* deinitialize osso */
 429         if (priv->osso_context) {
 430                 osso_deinitialize (priv->osso_context);
 431         }
 432         priv->osso_context = NULL;
 433
 434         G_OBJECT_CLASS (flashlight_status_plugin_parent_class)->finalize (object);
 435 }