battstat applet: remove HAL support

1 files changed, 0 insertions, 608 deletions

diff --git a/battstat/battstat-hal.c b/battstat/battstat-hal.c
deleted file mode 100644
index 28426f33..00000000
--- a/battstat/battstat-hal.c
+++ /dev/null
@@ -1,608 +0,0 @@
-/*
- * Copyright (C) 2005 by Ryan Lortie <[email protected]>
- *
- *  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., 59 Temple Street #330, Boston, MA 02110-1301, USA.
- *
- * $Id$
- */
-
-#include <config.h>
-
-#ifdef HAVE_HAL
-
-#include <dbus/dbus-glib-lowlevel.h>
-#include <libhal.h>
-#include <string.h>
-#include <math.h>
-
-#include "battstat-hal.h"
-
-static LibHalContext *battstat_hal_ctx;
-static GSList *batteries;
-static GSList *adaptors;
-static void (*status_updated_callback) (void);
-
-struct battery_status
-{
-  int present;
-  int current_level, design_level, full_level;
-  int remaining_time;
-  int charging, discharging;
-  int rate;
-};
-
-struct battery_info
-{
-  char *udi; /* must be first member */
-  struct battery_status status;
-};
-
-struct adaptor_info
-{
-  char *udi; /* must be first member */
-  int present;
-};
-
-static gboolean
-battery_update_property( LibHalContext *ctx, struct battery_info *battery,
-                         const char *key )
-{
-  DBusError error;
-  gboolean ret;
-
-  ret = TRUE;
-  dbus_error_init( &error );
-
-  if( !strcmp( key, "battery.present" ) )
-    battery->status.present =
-      libhal_device_get_property_bool( ctx, battery->udi, key, &error );
-
-  if( !strcmp( key, "battery.charge_level.current" ) )
-    battery->status.current_level =
-      libhal_device_get_property_int( ctx, battery->udi, key, &error );
-
-  if( !strcmp( key, "battery.charge_level.rate" ) )
-    battery->status.rate =
-      libhal_device_get_property_int( ctx, battery->udi, key, &error );
-
-  else if( !strcmp( key, "battery.charge_level.design" ) )
-    battery->status.design_level =
-      libhal_device_get_property_int( ctx, battery->udi, key, &error );
-
-  else if( !strcmp( key, "battery.charge_level.last_full" ) )
-    battery->status.full_level =
-      libhal_device_get_property_int( ctx, battery->udi, key, &error );
-
-  else if( !strcmp( key, "battery.remaining_time" ) )
-    battery->status.remaining_time =
-      libhal_device_get_property_int( ctx, battery->udi, key, &error );
-
-  else if( !strcmp( key, "battery.rechargeable.is_charging" ) )
-    battery->status.charging =
-      libhal_device_get_property_bool( ctx, battery->udi, key, &error );
-
-  else if( !strcmp( key, "battery.rechargeable.is_discharging" ) )
-    battery->status.discharging =
-      libhal_device_get_property_bool( ctx, battery->udi, key, &error );
-
-  else
-    ret = FALSE;
-
-  dbus_error_free( &error );
-
-  return ret;
-}
-
-static gboolean
-adaptor_update_property( LibHalContext *ctx, struct adaptor_info *adaptor,
-                         const char *key )
-{
-  DBusError error;
-  gboolean ret;
-
-  ret = TRUE;
-  dbus_error_init( &error );
-
-  if( !strcmp( key, "ac_adapter.present" ) )
-    adaptor->present =
-      libhal_device_get_property_bool( ctx, adaptor->udi, key, &error );
-  else
-    ret = FALSE;
-
-  dbus_error_free( &error );
-
-  return ret;
-}
-
-static GSList *
-find_link_by_udi( GSList *list, const char *udi )
-{
-  GSList *link;
-
-  for( link = list; link; link = g_slist_next( link ) )
-  {
-    /* this might be an adaptor!  this is OK as long as 'udi' is the first
-     * member of both structures.
-     */
-    struct battery_info *battery = link->data;
-
-    if( !strcmp( udi, battery->udi ) )
-      return link;
-  }
-
-  return NULL;
-}
-
-static void *
-find_device_by_udi( GSList *list, const char *udi )
-{
-  GSList *link;
-
-  link = find_link_by_udi( list, udi );
-
-  if( link )
-    return link->data;
-  else
-    return NULL;
-}
-
-static gboolean status_update_scheduled;
-
-static gboolean
-update_status_idle (gpointer junk)
-{
-  if (status_updated_callback)
-    status_updated_callback ();
-
-  return status_update_scheduled = FALSE;
-}
-
-static void
-schedule_status_callback (void)
-{
-  if (status_update_scheduled)
-    return;
-
-  status_update_scheduled = TRUE;
-  g_idle_add (update_status_idle, NULL);
-}
-
-static void
-property_callback( LibHalContext *ctx, const char *udi, const char *key,
-                   dbus_bool_t is_removed, dbus_bool_t is_added )
-{
-  struct battery_info *battery;
-  struct adaptor_info *adaptor;
-  gboolean changed;
-
-  /* It is safe to do nothing since the device will have been marked as
-   * not present and the old information will be ignored.
-   */
-  if( is_removed )
-    return;
-
-  changed = FALSE;
-
-  if( (battery = find_device_by_udi( batteries, udi )) )
-    changed |= battery_update_property( ctx, battery, key );
-
-  if( (adaptor = find_device_by_udi( adaptors, udi )) )
-    changed |= adaptor_update_property( ctx, adaptor, key );
-
-  if (changed && status_updated_callback)
-    schedule_status_callback ();
-}
-
-static void
-add_to_list( LibHalContext *ctx, GSList **list, const char *udi, int size )
-{
-  struct battery_info *battery = g_malloc0( size );
-  LibHalPropertySetIterator iter;
-  LibHalPropertySet *properties;
-  DBusError error;
-
-  /* this might be an adaptor!  this is OK as long as 'udi' is the first
-   * member of both structures.
-   */
-  battery->udi = g_strdup( udi );
-  *list = g_slist_append( *list, battery );
-
-  dbus_error_init( &error );
-
-  libhal_device_add_property_watch( ctx, udi, &error );
-
-  properties = libhal_device_get_all_properties( ctx, udi, &error );
-
-  for( libhal_psi_init( &iter, properties );
-       libhal_psi_has_more( &iter );
-       libhal_psi_next( &iter ) )
-  {
-    const char *key = libhal_psi_get_key( &iter );
-    property_callback( ctx, udi, key, FALSE, FALSE );
-  }
-    
-  libhal_free_property_set( properties );
-  dbus_error_free( &error );
-}
-
-static void
-free_list_data( void *data )
-{
-  /* this might be an adaptor!  this is OK as long as 'udi' is the first
-   * member of both structures.
-   */
-  struct battery_info *battery = data;
-
-  g_free( battery->udi );
-  g_free( battery );
-}
-
-static GSList *
-remove_from_list( LibHalContext *ctx, GSList *list, const char *udi )
-{
-  GSList *link = find_link_by_udi( list, udi );
-
-  if( link )
-  {
-    DBusError error;
-
-    dbus_error_init( &error );
-    libhal_device_remove_property_watch( ctx, udi, &error );
-    dbus_error_free( &error );
-
-    free_list_data( link->data );
-    list = g_slist_delete_link( list, link );
-  }
-
-  return list;
-}
-
-static GSList *
-free_entire_list( GSList *list )
-{
-  GSList *item;
-  
-  for( item = list; item; item = g_slist_next( item ) )
-    free_list_data( item->data );
-
-  g_slist_free( list );
-
-  return NULL;
-}
-
-static void
-device_added_callback( LibHalContext *ctx, const char *udi )
-{
-  if( libhal_device_property_exists( ctx, udi, "battery", NULL ) )
-  {
-    char *type = libhal_device_get_property_string( ctx, udi,
-                                                    "battery.type",
-                                                    NULL );
-
-    if( type )
-    {
-      /* We only track 'primary' batteries (ie: to avoid monitoring
-       * batteries in cordless mice or UPSes etc.)
-       */
-      if( !strcmp( type, "primary" ) )
-        add_to_list( ctx, &batteries, udi, sizeof (struct battery_info) );
-
-      libhal_free_string( type );
-    }
-  }
-
-  if( libhal_device_property_exists( ctx, udi, "ac_adapter", NULL ) )
-    add_to_list( ctx, &adaptors, udi, sizeof (struct adaptor_info) );
-}
-
-static void
-device_removed_callback( LibHalContext *ctx, const char *udi )
-{
-  batteries = remove_from_list( ctx, batteries, udi );
-  adaptors = remove_from_list( ctx, adaptors, udi );
-}
-
-/* ---- public functions ---- */
-
-char *
-battstat_hal_initialise (void (*callback) (void))
-{
-  DBusConnection *connection;
-  LibHalContext *ctx;
-  DBusError error;
-  char *error_str;
-  char **devices;
-  int i, num;
-
-  status_updated_callback = callback;
-
-  if( battstat_hal_ctx != NULL )
-    return g_strdup( "Already initialised!" );
-
-  dbus_error_init( &error );
-
-  if( (connection = dbus_bus_get( DBUS_BUS_SYSTEM, &error )) == NULL )
-    goto error_out;
-
-  dbus_connection_setup_with_g_main( connection, g_main_context_default() );
-
-  if( (ctx = libhal_ctx_new()) == NULL )
-  {
-    dbus_set_error( &error, _("HAL error"), _("Could not create libhal_ctx") );
-    goto error_out;
-  }
-
-  libhal_ctx_set_device_property_modified( ctx, property_callback );
-  libhal_ctx_set_device_added( ctx, device_added_callback );
-  libhal_ctx_set_device_removed( ctx, device_removed_callback );
-  libhal_ctx_set_dbus_connection( ctx, connection );
-
-  if( libhal_ctx_init( ctx, &error ) == 0 )
-    goto error_freectx;
-  
-  devices = libhal_find_device_by_capability( ctx, "battery", &num, &error );
-
-  if( devices == NULL )
-    goto error_shutdownctx;
-
-  /* FIXME: for now, if 0 battery devices are present on first scan, then fail.
-   * This allows fallover to the legacy (ACPI, APM, etc) backends if the
-   * installed version of HAL doesn't know about batteries.  This check should
-   * be removed at some point in the future (maybe circa MATE 2.13..).
-   */
-  if( num == 0 )
-  {
-    dbus_free_string_array( devices );
-    dbus_set_error( &error, _("HAL error"), _("No batteries found") );
-    goto error_shutdownctx;
-  }
-
-  for( i = 0; i < num; i++ )
-  {
-    char *type = libhal_device_get_property_string( ctx, devices[i],
-                                                    "battery.type",
-                                                    &error );
-
-    if( type )
-    {
-      /* We only track 'primary' batteries (ie: to avoid monitoring
-       * batteries in cordless mice or UPSes etc.)
-       */
-      if( !strcmp( type, "primary" ) )
-        add_to_list( ctx, &batteries, devices[i],
-                     sizeof (struct battery_info) );
-
-      libhal_free_string( type );
-    }
-  }
-  dbus_free_string_array( devices );
-
-  devices = libhal_find_device_by_capability( ctx, "ac_adapter", &num, &error );
-
-  if( devices == NULL )
-  {
-    batteries = free_entire_list( batteries );
-    goto error_shutdownctx;
-  }
-
-  for( i = 0; i < num; i++ )
-    add_to_list( ctx, &adaptors, devices[i], sizeof (struct adaptor_info) );
-  dbus_free_string_array( devices );
-
-  dbus_error_free( &error );
-
-  battstat_hal_ctx = ctx;
-
-  return NULL;
-
-error_shutdownctx:
-  libhal_ctx_shutdown( ctx, NULL );
-
-error_freectx:
-  libhal_ctx_free( ctx );
-
-error_out:
-  error_str = g_strdup_printf( _("Unable to initialise HAL: %s: %s"),
-                               error.name, error.message );
-  dbus_error_free( &error );
-  return error_str;
-}
-
-void
-battstat_hal_cleanup( void )
-{
-  if( battstat_hal_ctx == NULL )
-    return;
-
-  libhal_ctx_free( battstat_hal_ctx );
-  batteries = free_entire_list( batteries );
-  adaptors = free_entire_list( adaptors );
-}
-
-#include "battstat.h"
-
-/* This function currently exists to allow the multiple batteries supported
- * by the HAL backend to appear as a single composite battery device (since
- * at the current time this is all that battstat supports).
- *
- * This entire function is filled with logic to make multiple batteries
- * appear as one "composite" battery.  Comments included as appropriate.
- *
- * For more information about some of the assumptions made in the following
- * code please see the following mailing list post and the resulting thread:
- *
- *   http://lists.freedesktop.org/archives/hal/2005-July/002841.html
- */
-void
-battstat_hal_get_battery_info( BatteryStatus *status )
-{
-  /* The calculation to get overall percentage power remaining is as follows:
-   *
-   *    Sum( Current charges ) / Sum( Full Capacities )
-   *
-   * We can't just take an average of all of the percentages since this
-   * doesn't deal with the case that one battery might have a larger
-   * capacity than the other.
-   *
-   * In order to do this calculation, we need to keep a running total of
-   * current charge and full capacities.
-   */
-  int current_charge_total = 0, full_capacity_total = 0;
-
-  /* Record the time remaining as reported by HAL.  This is used in the event
-   * that the system has exactly one battery (since, then, the HAL is capable
-   * of providing an accurate time remaining report and we should trust it.)
-   */
-  int remaining_time = 0;
-
-  /* The total (dis)charge rate of the system is the sum of the rates of
-   * the individual batteries.
-   */
-  int rate_total = 0;
-
-  /* We need to know if we should report the composite battery as present
-   * at all.  The logic is that if at least one actual battery is installed
-   * then the composite battery will be reported to exist.
-   */
-  int present = 0;
-
-  /* We need to know if we are on AC power or not.  Eventually, we can look
-   * at the AC adaptor HAL devices to determine that.  For now, we assume that
-   * if any battery is discharging then we must not be on AC power.  Else, by
-   * default, we must be on AC.
-   */
-  int on_ac_power = 1;
-
-  /* Finally, we consider the composite battery to be "charging" if at least
-   * one of the actual batteries in the system is charging.
-   */
-  int charging = 0;
-
-  /* A list iterator. */
-  GSList *item;
-
-  /* For each physical battery bay... */
-  for( item = batteries; item; item = item->next )
-  {
-    struct battery_info *battery = item->data;
-
-    /* If no battery is installed here, don't count it toward the totals. */
-    if( !battery->status.present )
-      continue;
-
-    /* This battery is present. */
-
-    /* At least one battery present -> composite battery is present. */
-    present++;
-
-    /* At least one battery charging -> composite battery is charging. */
-    if( battery->status.charging )
-      charging = 1;
-
-    /* At least one battery is discharging -> we're not on AC. */
-    if( battery->status.discharging )
-      on_ac_power = 0;
-
-    /* Sum the totals for current charge, design capacity, (dis)charge rate. */
-    current_charge_total += battery->status.current_level;
-    full_capacity_total += battery->status.full_level;
-    rate_total += battery->status.rate;
-
-    /* Record remaining time too, incase this is the only battery. */
-    remaining_time = battery->status.remaining_time;
-  }
-
-  if( !present || full_capacity_total <= 0 || (charging && !on_ac_power) )
-  {
-    /* Either no battery is present or something has gone horribly wrong.
-     * In either case we must return that the composite battery is not
-     * present.
-     */
-    status->present = FALSE;
-    status->percent = 0;
-    status->minutes = -1;
-    status->on_ac_power = TRUE;
-    status->charging = FALSE;
-
-    return;
-  }
-
-  /* Else, our composite battery is present. */
-  status->present = TRUE;
-
-  /* As per above, overall charge is:
-   *
-   *    Sum( Current charges ) / Sum( Full Capacities )
-   */
-  status->percent = ( ((double) current_charge_total) /
-                      ((double) full_capacity_total)    ) * 100.0 + 0.5;
-
-  if( present == 1 )
-  {
-    /* In the case of exactly one battery, report the time remaining figure
-     * from HAL directly since it might have come from an authorative source
-     * (ie: the PMU or APM subsystem).
-     *
-     * HAL gives remaining time in seconds with a 0 to mean that the
-     * remaining time is unknown.  Battstat uses minutes and -1 for 
-     * unknown time remaining.
-     */
-
-    if( remaining_time == 0 )
-      status->minutes = -1;
-    else
-      status->minutes = (remaining_time + 30) / 60;
-  }
-  /* Rest of cases to deal with multiple battery systems... */
-  else if( !on_ac_power && rate_total != 0 )
-  {
-    /* Then we're discharging.  Calculate time remaining until at zero. */
-
-    double remaining;
-
-    remaining = (double) current_charge_total;
-    remaining /= (double) rate_total;
-    status->minutes = (int) floor( remaining * 60.0 + 0.5 );
-  }
-  else if( charging && rate_total != 0 )
-  {
-    /* Calculate time remaining until charged.  For systems with more than
-     * one battery, this code is very approximate.  The assumption is that if
-     * one battery reaches full charge before the other that the other will
-     * start charging faster due to the increase in available power (similar
-     * to how a laptop will charge faster if you're not using it).
-     */
-
-    double remaining;
-
-    remaining = (double) (full_capacity_total - current_charge_total);
-    if( remaining < 0 )
-      remaining = 0;
-    remaining /= (double) rate_total;
-
-    status->minutes = (int) floor( remaining * 60.0 + 0.5 );
-  }
-  else
-  {
-    /* On AC power and not charging -or- rate is unknown. */
-    status->minutes = -1;
-  }
-
-  /* These are simple and well-explained above. */
-  status->charging = charging;
-  status->on_ac_power = on_ac_power;
-}
-
-#endif /* HAVE_HAL */