path: root/src/status-items.c

/*
Code to build and maintain the status adjustment menuitems.

Copyright 2011 Canonical Ltd.

Authors:
    Ted Gould <ted@canonical.com>

This program is free software: you can redistribute it and/or modify it 
under the terms of the GNU General Public License version 3, as published 
by the Free Software Foundation.

This program is distributed in the hope that it will be useful, but 
WITHOUT ANY WARRANTY; without even the implied warranties of 
MERCHANTABILITY, SATISFACTORY QUALITY, 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, see <http://www.gnu.org/licenses/>.
*/

#include <glib.h>
#include <glib/gi18n.h>
#include <gio/gio.h>

#include "status-items.h"
#include "status-provider.h"
#include "dbus-data.h"

static const gchar * status_ids [STATUS_PROVIDER_STATUS_LAST] = {
  /* STATUS_PROVIDER_STATUS_ONLINE,    */   "available",
  /* STATUS_PROVIDER_STATUS_AWAY,      */   "away",
  /* STATUS_PROVIDER_STATUS_DND        */   "busy",
  /* STATUS_PROVIDER_STATUS_INVISIBLE  */   "invisible",
  /* STATUS_PROVIDER_STATUS_OFFLINE,   */   "offline",
  /* STATUS_PROVIDER_STATUS_DISCONNECTED*/  "offline"
};

static const gchar * status_strings [STATUS_PROVIDER_STATUS_LAST] = {
  /* STATUS_PROVIDER_STATUS_ONLINE,    */   N_("Available"),
  /* STATUS_PROVIDER_STATUS_AWAY,      */   N_("Away"),
  /* STATUS_PROVIDER_STATUS_DND        */   N_("Busy"),
  /* STATUS_PROVIDER_STATUS_INVISIBLE  */   N_("Invisible"),
  /* STATUS_PROVIDER_STATUS_OFFLINE,   */   N_("Offline"),
  /* STATUS_PROVIDER_STATUS_DISCONNECTED*/  N_("Offline")
};

static const gchar * status_icons[STATUS_PROVIDER_STATUS_LAST] = {
  /* STATUS_PROVIDER_STATUS_ONLINE, */      "user-available",
  /* STATUS_PROVIDER_STATUS_AWAY, */        "user-away",
  /* STATUS_PROVIDER_STATUS_DND, */         "user-busy",
  /* STATUS_PROVIDER_STATUS_INVISIBLE, */   "user-invisible",
  /* STATUS_PROVIDER_STATUS_OFFLINE */      "user-offline",
  /* STATUS_PROVIDER_STATUS_DISCONNECTED */ "user-offline-panel"
};

static const gchar * panel_icons[STATUS_PROVIDER_STATUS_LAST] = {
  /* STATUS_PROVIDER_STATUS_ONLINE, */      "indicator-messages-user-available",
  /* STATUS_PROVIDER_STATUS_AWAY, */        "indicator-messages-user-away",
  /* STATUS_PROVIDER_STATUS_DND, */         "indicator-messages-user-busy",
  /* STATUS_PROVIDER_STATUS_INVISIBLE, */   "indicator-messages-user-invisible",
  /* STATUS_PROVIDER_STATUS_OFFLINE */      "indicator-messages-user-offline",
  /* STATUS_PROVIDER_STATUS_DISCONNECTED */ "indicator-messages-user-disconnected"
};

static const gchar * panel_active_icons[STATUS_PROVIDER_STATUS_LAST] = {
  /* STATUS_PROVIDER_STATUS_ONLINE, */      "indicator-messages-new-user-available",
  /* STATUS_PROVIDER_STATUS_AWAY, */        "indicator-messages-new-user-away",
  /* STATUS_PROVIDER_STATUS_DND, */         "indicator-messages-new-user-busy",
  /* STATUS_PROVIDER_STATUS_INVISIBLE, */   "indicator-messages-new-user-invisible",
  /* STATUS_PROVIDER_STATUS_OFFLINE */      "indicator-messages-new-user-offline",
  /* STATUS_PROVIDER_STATUS_DISCONNECTED */ "indicator-messages-new-user-disconnected"
};

/* Prototypes */
static gboolean provider_directory_parse (gpointer dir);
static gboolean load_status_provider (gpointer dir);
static void user_status_change (GSimpleAction *action,
				GVariant *value,
				gpointer user_data);

/* Globals */
static StatusProviderStatus current_status = STATUS_PROVIDER_STATUS_DISCONNECTED;
static GMenu * menu;
static GAction *status_action;
static GList * status_providers = NULL;

/* Build the inital status items and start kicking off the async code
   for handling all the statuses */
GMenuModel *
status_items_build (GAction *action)
{
	int i;
	menu = g_menu_new ();

	status_action = action;
	g_signal_connect (action, "change-state", G_CALLBACK (user_status_change), NULL);

	for (i = STATUS_PROVIDER_STATUS_ONLINE; i < STATUS_PROVIDER_STATUS_DISCONNECTED; i++) {
		GMenuItem *item = g_menu_item_new (_(status_strings[i]), NULL);

		g_menu_item_set_action_and_target (item, g_action_get_name (action), "s", status_ids[i]);

		g_menu_item_set_attribute (item, INDICATOR_MENU_ATTRIBUTE_ICON_NAME, "s", status_icons[i]);
		g_menu_item_set_attribute (item, INDICATOR_MENU_ATTRIBUTE_VISIBLE, "b", TRUE);
		g_menu_item_set_attribute (item, INDICATOR_MENU_ATTRIBUTE_ENABLED, "b", FALSE);

		g_menu_append_item (menu, item);
		g_object_unref (item);
	}

	const gchar * status_providers_env = g_getenv("INDICATOR_MESSAGES_STATUS_PROVIDER_DIR");
	if (status_providers_env == NULL) {
		g_idle_add(provider_directory_parse, STATUS_PROVIDER_DIR);
	} else {
		g_idle_add(provider_directory_parse, (gpointer)status_providers_env);
	}

	return G_MENU_MODEL (menu);
}

/* Clean up our globals and stop with all this allocation
   of memory */
void
status_items_cleanup (void)
{
	while (status_providers != NULL) {
		StatusProvider * sprovider = STATUS_PROVIDER(status_providers->data);
		g_object_unref(sprovider);
		status_providers = g_list_remove(status_providers, sprovider);
	}

	return;
}

/* Get the icon that should be shown on the panel */
const gchar *
status_current_panel_icon (gboolean alert)
{
	if (alert) {
		return panel_active_icons[current_status];
	} else {
		return panel_icons[current_status];
	}
}

/* Update status from all the providers */
static void
update_status (void)
{
	StatusProviderStatus status = STATUS_PROVIDER_STATUS_DISCONNECTED;
	GList * provider;

	for (provider = status_providers; provider != NULL; provider = g_list_next(provider)) {
		StatusProviderStatus localstatus = status_provider_get_status(STATUS_PROVIDER(provider->data));

		if (localstatus < status) {
			status = localstatus;
		}
	}

	if (status == current_status) {
		return;
	}

	current_status = status;

	g_action_change_state (status_action, g_variant_new_string (status_ids[current_status]));

	return;
}

/* Handle the user requesting a status change */
static void
user_status_change (GSimpleAction *action,
		    GVariant *value,
		    gpointer user_data)
{
	const gchar *status_id;
	int i;
	StatusProviderStatus status = STATUS_PROVIDER_STATUS_DISCONNECTED;
	GList * provider;

	g_return_if_fail (g_variant_is_of_type (value, G_VARIANT_TYPE_STRING));

	status_id = g_variant_get_string (value, NULL);

	for (i = STATUS_PROVIDER_STATUS_ONLINE; i < STATUS_PROVIDER_STATUS_DISCONNECTED; i++) {
		if (!strcmp (status_id, status_ids [i])) {
			status = i;
			break;
		}
	}

	/* Set each provider to this status */
	for (provider = status_providers; provider != NULL; provider = g_list_next(provider)) {
		status_provider_set_status(STATUS_PROVIDER(provider->data), status);
	}

	/* See what we really are now */
	update_status();
	return;
}

/* Start parsing a directory and setting up the entires in the idle loop */
static gboolean
provider_directory_parse (gpointer directory)
{
	const gchar * dirname = (const gchar *)directory;
	g_debug("Looking for status providers in: %s", dirname);

	if (!g_file_test(dirname, G_FILE_TEST_EXISTS)) {
		return FALSE;
	}

	GDir * dir = g_dir_open(dirname, 0, NULL);
	if (dir == NULL) {
		return FALSE;
	}

	const gchar * name;
	while ((name = g_dir_read_name(dir)) != NULL) {
		if (!g_str_has_suffix(name, G_MODULE_SUFFIX)) {
			continue;
		}

		gchar * fullname = g_build_filename(dirname, name, NULL);
		g_idle_add(load_status_provider, fullname);
	}

	g_dir_close(dir);

	return FALSE;
}

/* Close the module as an idle function so that we know
   it's all cleaned up */
static gboolean
module_destroy_in_idle_helper (gpointer data)
{
	GModule * module = (GModule *)data;
	if (module != NULL) {
		g_debug("Unloading module: %s", g_module_name(module));
		g_module_close(module);
	}
	return FALSE;
}

/* Set up an idle function to close the module */
static void
module_destroy_in_idle (gpointer data)
{
	g_idle_add_full(G_PRIORITY_LOW, module_destroy_in_idle_helper, data, NULL);
	return;
}

/* Load a particular status provider */
static gboolean
load_status_provider (gpointer dir)
{
	gchar * provider = dir;

	/* load the module */
	GModule * module = NULL;
	if (g_file_test(provider, G_FILE_TEST_EXISTS)) {
		g_debug("Loading status provider: %s", provider);
		module = g_module_open(provider, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL);
		if (module == NULL) {
			g_warning("Unable to open module: %s", provider);
		}
	}

	/* find the status provider's GType */
	GType provider_type = 0;
	if (module != NULL) {
		GType (*type_func) (void);
		if (!g_module_symbol(module, STATUS_PROVIDER_EXPORT_S, (gpointer *)&type_func)) {
			g_warning("Unable to find type symbol in: %s", provider);
		} else {
			provider_type = type_func();
			if (provider_type == 0) {
				g_warning("Unable to create type from: %s", provider);
			}
		}
	}

	/* instantiate the status provider */
	StatusProvider * sprovider = NULL;
	if (provider_type != 0) {
		sprovider = STATUS_PROVIDER(g_object_new(provider_type, NULL));
		if (sprovider == NULL) {
			g_warning("Unable to build provider from: %s", provider);
		}
	}

	/* use the provider */
	if (sprovider != NULL) {
		/* On update let's talk to all of them and create the aggregate
		   value to export */
		g_signal_connect(G_OBJECT(sprovider),
		                 STATUS_PROVIDER_SIGNAL_STATUS_CHANGED,
		                 G_CALLBACK(update_status), NULL);

		/* Attach the module object to the status provider so
		   that when the status provider is free'd the module
		   is closed automatically. */
		g_object_set_data_full(G_OBJECT(sprovider),
		                       "status-provider-module",
		                       module, module_destroy_in_idle);
		module = NULL; /* don't close module in this func */

		status_providers = g_list_prepend(status_providers, sprovider);

		/* Force an update to ensure a consistent state */
		update_status();
	}

	/* cleanup */
	if (module != NULL)
		g_module_close(module);
	g_free(provider);
	return FALSE; /* only call this idle func once */
}