Listen to cups dbus messages to update menu when jobs are added / done

3 files changed, 276 insertions, 25 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 5684e70..7b66b1b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -12,13 +12,29 @@ libprintersmenu_la_LIBADD = $(APPLET_LIBS)
 libprintersmenu_la_LDFLAGS = -module -avoid-version
 
 
+cups_notifier_sources = \
+	cups-notifier.c \
+	cups-notifier.h
+
+$(cups_notifier_sources): org.cups.cupsd.Notifier.xml
+	gdbus-codegen \
+	    --interface-prefix org.cups.cupsd \
+	    --c-namespace Cups \
+	    --generate-c-code cups-notifier \
+	    $^
+
+
 libexec_PROGRAMS = indicator-printers-service
 indicator_printers_service_SOURCES = \
 	indicator-printers-service.c \
 	indicator-printers-service.h \
 	indicator-printers-menu.c \
-	indicator-printers-menu.h
+	indicator-printers-menu.h \
+	$(cups_notifier_sources)
 
 indicator_printers_service_CPPFLAGS = $(SERVICE_CFLAGS)
 indicator_printers_service_LDADD = $(SERVICE_LIBS)
 
+
+BUILT_SOURCES = $(cups_notifier_sources)
+
diff --git a/src/indicator-printers-menu.c b/src/indicator-printers-menu.c
index e0cfd4b..8aa4c62 100644
--- a/src/indicator-printers-menu.c
+++ b/src/indicator-printers-menu.c
@@ -4,6 +4,8 @@
 #include <gio/gio.h>
 #include <cups/cups.h>
 
+#include "cups-notifier.h"
+
 
 G_DEFINE_TYPE (IndicatorPrintersMenu, indicator_printers_menu, G_TYPE_OBJECT)
 
@@ -15,6 +17,7 @@ struct _IndicatorPrintersMenuPrivate
 {
     DbusmenuMenuitem *root;
     GHashTable *printers;    /* printer name -> dbusmenuitem */
+    CupsNotifier *cups_notifier;
 };
 
 
@@ -29,6 +32,7 @@ dispose (GObject *object)
     }
 
     g_clear_object (&priv->root);
+    g_clear_object (&priv->cups_notifier);
 
     G_OBJECT_CLASS (indicator_printers_menu_parent_class)->dispose (object);
 }
@@ -45,6 +49,19 @@ indicator_printers_menu_class_init (IndicatorPrintersMenuClass *klass)
 }
 
 
+static int
+get_number_of_active_jobs (const gchar *printer)
+{
+    int njobs;
+    cups_job_t *jobs;
+
+    njobs = cupsGetJobs (&jobs, printer, 1, CUPS_WHICHJOBS_ACTIVE);
+    cupsFreeJobs (njobs, jobs);
+
+    return njobs;
+}
+
+
 static void
 show_system_settings (DbusmenuMenuitem *menuitem,
                       guint timestamp,
@@ -79,19 +96,35 @@ show_system_settings (DbusmenuMenuitem *menuitem,
     g_object_unref (appinfo);
 }
 
+
 static void
-add_printer_menuitem (IndicatorPrintersMenu *self,
-                      const char *printer,
-                      int state,
-                      int njobs)
+update_printer_menuitem (IndicatorPrintersMenu *self,
+                         const char *printer,
+                         int state,
+                         int njobs)
 {
     IndicatorPrintersMenuPrivate *priv = PRINTERS_MENU_PRIVATE (self);
     DbusmenuMenuitem *item;
 
-    item = dbusmenu_menuitem_new ();
-    dbusmenu_menuitem_property_set (item, "type", "indicator-item");
-    dbusmenu_menuitem_property_set (item, "indicator-icon-name", "printer");
-    dbusmenu_menuitem_property_set (item, "indicator-label", printer);
+    item = g_hash_table_lookup (priv->printers, printer);
+
+    if (!item) {
+        item = dbusmenu_menuitem_new ();
+        dbusmenu_menuitem_property_set (item, "type", "indicator-item");
+        dbusmenu_menuitem_property_set (item, "indicator-icon-name", "printer");
+        g_signal_connect_data (item, "item-activated",
+                               G_CALLBACK (show_system_settings),
+                               g_strdup (printer), (GClosureNotify) g_free, 0);
+
+        dbusmenu_menuitem_child_append(priv->root, item);
+        g_hash_table_insert (priv->printers, g_strdup (printer), item);
+    }
+
+    if (njobs == 0) {
+        dbusmenu_menuitem_property_set_bool (item, "visible", FALSE);
+        return;
+    }
+
     dbusmenu_menuitem_property_set_bool (item, "visible", TRUE);
 
     switch (state) {
@@ -108,13 +141,49 @@ add_printer_menuitem (IndicatorPrintersMenu *self,
             break;
         }
     }
+}
+
+
+static void
+update_job (CupsNotifier *cups_notifier,
+            const gchar *text,
+            const gchar *printer_uri,
+            const gchar *printer_name,
+            guint printer_state,
+            const gchar *printer_state_reasons,
+            gboolean printer_is_accepting_jobs,
+            guint job_id,
+            guint job_state,
+            const gchar *job_state_reasons,
+            const gchar *job_name,
+            guint job_impressions_completed,
+            gpointer user_data)
+{
+    IndicatorPrintersMenu *self = INDICATOR_PRINTERS_MENU (user_data);
+
+    update_printer_menuitem (self,
+                             printer_name,
+                             printer_state,
+                             get_number_of_active_jobs (printer_name));
+}
+
 
-    g_signal_connect_data (item, "item-activated",
-                           G_CALLBACK (show_system_settings),
-                           g_strdup (printer), (GClosureNotify) g_free, 0);
+static void
+on_printer_state_changed (CupsNotifier *object,
+                          const gchar *text,
+                          const gchar *printer_uri,
+                          const gchar *printer_name,
+                          guint printer_state,
+                          const gchar *printer_state_reasons,
+                          gboolean printer_is_accepting_jobs,
+                          gpointer user_data)
+{
+    IndicatorPrintersMenu *self = INDICATOR_PRINTERS_MENU (user_data);
 
-    dbusmenu_menuitem_child_append(priv->root, item);
-    g_hash_table_insert (priv->printers, g_strdup (printer), item);
+    update_printer_menuitem (self,
+                             printer_name,
+                             printer_state,
+                             get_number_of_active_jobs (printer_name));
 }
 
 
@@ -122,9 +191,9 @@ static void
 indicator_printers_menu_init (IndicatorPrintersMenu *self)
 {
     IndicatorPrintersMenuPrivate *priv = PRINTERS_MENU_PRIVATE (self);
-    int ndests, njobs, i, state;
+    int ndests, i;
     cups_dest_t *dests;
-    cups_job_t *jobs;
+    GError *error = NULL;
 
     priv->root = dbusmenu_menuitem_new ();
 
@@ -133,18 +202,37 @@ indicator_printers_menu_init (IndicatorPrintersMenu *self)
                                             g_free,
                                             g_object_unref);
 
+    priv->cups_notifier = cups_notifier_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
+                                                                0,
+                                                                NULL,
+                                                                "/org/cups/cupsd/Notifier",
+                                                                NULL,
+                                                                &error);
+    if (error) {
+        g_warning ("Error creating cups notify handler: %s", error->message);
+        g_clear_error (&error);
+    }
+    else {
+        g_signal_connect (priv->cups_notifier, "job-created",
+                          G_CALLBACK (update_job), self);
+        g_signal_connect (priv->cups_notifier, "job-state",
+                          G_CALLBACK (update_job), self);
+        g_signal_connect (priv->cups_notifier, "job-completed",
+                          G_CALLBACK (update_job), self);
+        g_signal_connect (priv->cups_notifier, "printer-state-changed",
+                          G_CALLBACK (on_printer_state_changed), self);
+    }
+
     /* create initial menu items */
     ndests = cupsGetDests (&dests);
     for (i = 0; i < ndests; i++) {
-        njobs = cupsGetJobs (&jobs, dests[i].name, 1, CUPS_WHICHJOBS_ACTIVE);
-        state = atoi (cupsGetOption ("printer-state",
-                                     dests[i].num_options,
-                                     dests[i].options));
-
-        if (njobs > 0)
-            add_printer_menuitem (self, dests[i].name, state, njobs);
-
-        cupsFreeJobs (njobs, jobs);
+        int state = atoi (cupsGetOption ("printer-state",
+                                         dests[i].num_options,
+                                         dests[i].options));
+        update_printer_menuitem (self,
+                                 dests[i].name,
+                                 state,
+                                 get_number_of_active_jobs (dests[i].name));
     }
     cupsFreeDests (ndests, dests);
 }
diff --git a/src/org.cups.cupsd.Notifier.xml b/src/org.cups.cupsd.Notifier.xml
new file mode 100644
index 0000000..e70a5c3
--- /dev/null
+++ b/src/org.cups.cupsd.Notifier.xml
@@ -0,0 +1,147 @@
+<node>
+
+    <interface name="org.cups.cupsd.Notifier">
+
+        <signal name="ServerStarted">
+            <arg type="s" name="text" />
+        </signal>
+
+        <signal name="ServerRestarted">
+            <arg type="s" name="text" />
+        </signal>
+
+        <signal name="ServerStopped">
+            <arg type="s" name="text" />
+        </signal>
+
+        <signal name="ServerAudit">
+            <arg type="s" name="text" />
+        </signal>
+
+        <signal name="PrinterAdded">
+            <arg type="s" name="text" />
+            <arg type="s" name="printer_uri" />
+            <arg type="s" name="printer_name" />
+            <arg type="u" name="printer_state" />
+            <arg type="s" name="printer_state_reasons" />
+            <arg type="b" name="printer_is_accepting_jobs" />
+        </signal>
+
+        <signal name="PrinterDeleted">
+            <arg type="s" name="text" />
+            <arg type="s" name="printer_uri" />
+            <arg type="s" name="printer_name" />
+            <arg type="u" name="printer_state" />
+            <arg type="s" name="printer_state_reasons" />
+            <arg type="b" name="printer_is_accepting_jobs" />
+        </signal>
+
+        <signal name="PrinterModified">
+            <arg type="s" name="text" />
+            <arg type="s" name="printer_uri" />
+            <arg type="s" name="printer_name" />
+            <arg type="u" name="printer_state" />
+            <arg type="s" name="printer_state_reasons" />
+            <arg type="b" name="printer_is_accepting_jobs" />
+        </signal>
+
+        <signal name="PrinterRestarted">
+            <arg type="s" name="text" />
+            <arg type="s" name="printer_uri" />
+            <arg type="s" name="printer_name" />
+            <arg type="u" name="printer_state" />
+            <arg type="s" name="printer_state_reasons" />
+            <arg type="b" name="printer_is_accepting_jobs" />
+        </signal>
+
+        <signal name="PrinterStopped">
+            <arg type="s" name="text" />
+            <arg type="s" name="printer_uri" />
+            <arg type="s" name="printer_name" />
+            <arg type="u" name="printer_state" />
+            <arg type="s" name="printer_state_reasons" />
+            <arg type="b" name="printer_is_accepting_jobs" />
+        </signal>
+
+        <signal name="PrinterShutdown">
+            <arg type="s" name="text" />
+            <arg type="s" name="printer_uri" />
+            <arg type="s" name="printer_name" />
+            <arg type="u" name="printer_state" />
+            <arg type="s" name="printer_state_reasons" />
+            <arg type="b" name="printer_is_accepting_jobs" />
+        </signal>
+
+        <signal name="PrinterStateChanged">
+            <arg type="s" name="text" />
+            <arg type="s" name="printer_uri" />
+            <arg type="s" name="printer_name" />
+            <arg type="u" name="printer_state" />
+            <arg type="s" name="printer_state_reasons" />
+            <arg type="b" name="printer_is_accepting_jobs" />
+        </signal>
+
+        <signal name="PrinterFinishingsChanged">
+            <arg type="s" name="text" />
+            <arg type="s" name="printer_uri" />
+            <arg type="s" name="printer_name" />
+            <arg type="u" name="printer_state" />
+            <arg type="s" name="printer_state_reasons" />
+            <arg type="b" name="printer_is_accepting_jobs" />
+        </signal>
+
+        <signal name="PrinterMediaChanged">
+            <arg type="s" name="text" />
+            <arg type="s" name="printer_uri" />
+            <arg type="s" name="printer_name" />
+            <arg type="u" name="printer_state" />
+            <arg type="s" name="printer_state_reasons" />
+            <arg type="b" name="printer_is_accepting_jobs" />
+        </signal>
+
+        <signal name="JobCreated">
+            <arg type="s" name="text" />
+            <arg type="s" name="printer_uri" />
+            <arg type="s" name="printer_name" />
+            <arg type="u" name="printer_state" />
+            <arg type="s" name="printer_state_reasons" />
+            <arg type="b" name="printer_is_accepting_jobs" />
+            <arg type="u" name="job_id" />
+            <arg type="u" name="job_state" />
+            <arg type="s" name="job_state_reasons" />
+            <arg type="s" name="job_name" />
+            <arg type="u" name="job_impressions_completed" />
+        </signal>
+
+        <signal name="JobCompleted">
+            <arg type="s" name="text" />
+            <arg type="s" name="printer_uri" />
+            <arg type="s" name="printer_name" />
+            <arg type="u" name="printer_state" />
+            <arg type="s" name="printer_state_reasons" />
+            <arg type="b" name="printer_is_accepting_jobs" />
+            <arg type="u" name="job_id" />
+            <arg type="u" name="job_state" />
+            <arg type="s" name="job_state_reasons" />
+            <arg type="s" name="job_name" />
+            <arg type="u" name="job_impressions_completed" />
+        </signal>
+
+        <signal name="JobState">
+            <arg type="s" name="text" />
+            <arg type="s" name="printer_uri" />
+            <arg type="s" name="printer_name" />
+            <arg type="u" name="printer_state" />
+            <arg type="s" name="printer_state_reasons" />
+            <arg type="b" name="printer_is_accepting_jobs" />
+            <arg type="u" name="job_id" />
+            <arg type="u" name="job_state" />
+            <arg type="s" name="job_state_reasons" />
+            <arg type="s" name="job_name" />
+            <arg type="u" name="job_impressions_completed" />
+        </signal>
+
+    </interface>
+
+</node>
+