1.1 --- a/Makefile	Sun Jun 17 11:05:28 2018 +0200
     1.2 +++ b/Makefile	Sun Jun 17 17:05:16 2018 +0200
     1.3 @@ -143,9 +143,9 @@
     1.4  			-DSETTINGS_SCHEMA_ID=\"$(APPLICATION_ID)\" \
     1.5  			-DI_KNOW_THE_PACKAGEKIT_GLIB2_API_IS_SUBJECT_TO_CHANGE
     1.6  $(PACKAGE): XCFLAGS =	$(shell pkg-config --cflags gtk+-3.0 \
     1.7 -			    appindicator3-0.1 packagekit-glib2)
     1.8 +			    appindicator3-0.1 packagekit-glib2 upower-glib)
     1.9  $(PACKAGE): LDLIBS =	$(shell pkg-config --libs gtk+-3.0 \
    1.10 -			    appindicator3-0.1 packagekit-glib2)
    1.11 +			    appindicator3-0.1 packagekit-glib2 upower-glib)
    1.12  
    1.13  $(PACKAGE)-prefs: XCPPFLAGS = -DPACKAGE=\"$(PACKAGE)\" \
    1.14  			-DAPPLICATION_ID=\"$(PREFS_APPLICATION_ID)\" \

     2.1 --- a/README	Sun Jun 17 11:05:28 2018 +0200
     2.2 +++ b/README	Sun Jun 17 17:05:16 2018 +0200
     2.3 @@ -23,6 +23,7 @@
     2.4  - GTK+ version 3.18 or later
     2.5  - libappindicator 12.10.0 or later
     2.6  - PackageKit-glib2 0.8.17 or later
     2.7 +- upower-glib 0.99.0 or later
     2.8  - the xsltproc tool from libxml2
     2.9  
    2.10  Before building package-update-indicator check the commented macros in the

     3.1 --- a/pui-backend.c	Sun Jun 17 11:05:28 2018 +0200
     3.2 +++ b/pui-backend.c	Sun Jun 17 17:05:16 2018 +0200
     3.3 @@ -27,19 +27,25 @@
     3.4  #include <string.h>
     3.5  #include <sys/stat.h>
     3.6  #include <sys/types.h>
     3.7 +#include <upower.h>
     3.8  #include <utime.h>
     3.9  
    3.10  #include "pui-common.h"
    3.11  #include "pui-backend.h"
    3.12  #include "pui-get-updates.h"
    3.13  
    3.14 +#define	LOW_BATTERY_THRESHOLD	10.0
    3.15 +
    3.16  struct _PuiBackend {
    3.17  	GObject		parent_instance;
    3.18  	PkControl	*pk_control;
    3.19  	GCancellable	*cancellable;
    3.20 +	UpClient	*up_client;
    3.21 +	UpDevice	*up_device;
    3.22  	gint64		last_check;
    3.23  	PkNetworkEnum	network_state;
    3.24  	gboolean	inhibited;
    3.25 +	gboolean	is_battery_low;
    3.26  	guint		periodic_check_id;
    3.27  	guint		refresh_interval;
    3.28  	gboolean	use_mobile_connection;
    3.29 @@ -190,7 +196,8 @@
    3.30  
    3.31  	inhibited = ((self->network_state == PK_NETWORK_ENUM_OFFLINE) ||
    3.32  	    (!self->use_mobile_connection &&
    3.33 -	    (self->network_state == PK_NETWORK_ENUM_MOBILE)));
    3.34 +	    (self->network_state == PK_NETWORK_ENUM_MOBILE)) ||
    3.35 +	    self->is_battery_low);
    3.36  	if (self->inhibited == inhibited) {
    3.37  		return;
    3.38  	}
    3.39 @@ -293,6 +300,14 @@
    3.40  		g_clear_object(&self->pk_control);
    3.41  	}
    3.42  
    3.43 +	if (self->up_device != NULL) {
    3.44 +		g_clear_object(&self->up_device);
    3.45 +	}
    3.46 +
    3.47 +	if (self->up_client != NULL) {
    3.48 +		g_clear_object(&self->up_client);
    3.49 +	}
    3.50 +
    3.51  	G_OBJECT_CLASS(pui_backend_parent_class)->dispose(object);
    3.52  }
    3.53  
    3.54 @@ -343,7 +358,13 @@
    3.55  pui_backend_init(PuiBackend *self)
    3.56  {
    3.57  	self->pk_control = pk_control_new();
    3.58 +
    3.59  	self->inhibited = TRUE;
    3.60 +
    3.61 +	self->up_client = up_client_new();
    3.62 +	if (self->up_client) {
    3.63 +		self->up_device = up_client_get_display_device(self->up_client);
    3.64 +	}
    3.65  }
    3.66  
    3.67  static void
    3.68 @@ -390,6 +411,26 @@
    3.69  }
    3.70  
    3.71  static void
    3.72 +on_notify_device_charge_percentage(UpDevice *device, GParamSpec *pspec,
    3.73 +    gpointer user_data)
    3.74 +{
    3.75 +	PuiBackend	*self = user_data;
    3.76 +	UpDeviceKind	kind;
    3.77 +	gdouble		percentage;
    3.78 +
    3.79 +	g_object_get(device, "kind", &kind, "percentage", &percentage, NULL);
    3.80 +	if ((kind != UP_DEVICE_KIND_BATTERY) && (kind != UP_DEVICE_KIND_UPS)) {
    3.81 +		return;
    3.82 +	}
    3.83 +	g_debug("charge percentage changed: %.0f%%\n", percentage);
    3.84 +	if ((self->is_battery_low && (percentage > LOW_BATTERY_THRESHOLD)) ||
    3.85 +	    (!self->is_battery_low && (percentage < LOW_BATTERY_THRESHOLD))) {
    3.86 +		self->is_battery_low = !self->is_battery_low;
    3.87 +		check_inhibit(self);
    3.88 +	}
    3.89 +}
    3.90 +
    3.91 +static void
    3.92  on_notify_network_state(PkControl *pk_control, GParamSpec *pspec,
    3.93      gpointer user_data)
    3.94  {
    3.95 @@ -451,11 +492,28 @@
    3.96  {
    3.97  	PuiBackend	*self = PUI_BACKEND(initable);
    3.98  	GTask		*task = G_TASK(result);
    3.99 +	UpDeviceKind	kind;
   3.100 +	gdouble		percentage;
   3.101  
   3.102  	if (!g_task_propagate_boolean(task, errorp)) {
   3.103  		return (FALSE);
   3.104  	}
   3.105  
   3.106 +	if (self->up_device != NULL) {
   3.107 +		/* get the kind of device and charge percentage */
   3.108 +		g_object_get(self->up_device, "kind", &kind, "percentage",
   3.109 +		    &percentage, NULL);
   3.110 +		if ((kind == UP_DEVICE_KIND_BATTERY) ||
   3.111 +		    (kind == UP_DEVICE_KIND_UPS)) {
   3.112 +			self->is_battery_low =
   3.113 +			    (percentage < LOW_BATTERY_THRESHOLD);
   3.114 +		}
   3.115 +
   3.116 +		/* get notification if the charge percentage changes */
   3.117 +		g_signal_connect(self->up_device, "notify::percentage",
   3.118 +		    G_CALLBACK(on_notify_device_charge_percentage), self);
   3.119 +	}
   3.120 +
   3.121  	/* get notification when the network state changes */
   3.122  	g_signal_connect(self->pk_control, "notify::network-state",
   3.123  	    G_CALLBACK(on_notify_network_state), self);