Adding PAPI printbackend

Adding a new print backend module using libpapi detals see GNOME#382676.
(gheet)

6 files changed, 1119 insertions, 0 deletions

diff --git a/modules/printbackends/Makefile.am b/modules/printbackends/Makefile.am
index 11d242385..ec4ad9fc0 100644
--- a/modules/printbackends/Makefile.am
+++ b/modules/printbackends/Makefile.am
@@ -10,6 +10,10 @@ if TEST_PRINT_BACKEND
 SUBDIRS += test
 endif
 
+if HAVE_PAPI
+SUBDIRS += papi
+endif
+
 DIST_SUBDIRS = cups file lpr test
 
 -include $(top_srcdir)/git.mk
diff --git a/modules/printbackends/papi/Makefile.am b/modules/printbackends/papi/Makefile.am
new file mode 100644
index 000000000..5e5c14489
--- /dev/null
+++ b/modules/printbackends/papi/Makefile.am
@@ -0,0 +1,32 @@
+if OS_WIN32
+no_undefined = -no-undefined
+endif
+
+INCLUDES = \
+	-I$(top_srcdir) 				\
+	-I$(top_srcdir)/gtk				\
+	-I$(top_builddir)/gtk				\
+	-I$(top_srcdir)/gdk				\
+	-I$(top_builddir)/gdk				\
+	-DGTK_PRINT_BACKEND_ENABLE_UNSUPPORTED		\
+	$(GTK_DEP_CFLAGS)				\
+	$(GTK_DEBUG_FLAGS)
+
+LDADDS = \
+	$(GTK_DEP_LIBS)					\
+	$(top_builddir)/gtk/$(gtktargetlib)		
+
+backenddir = $(libdir)/gtk-2.0/$(GTK_BINARY_VERSION)/printbackends
+
+backend_LTLIBRARIES = libprintbackend-papi.la
+
+libprintbackend_papi_la_SOURCES =	\
+	gtkprinterpapi.c		\
+	gtkprintbackendpapi.c
+
+noinst_HEADERS =			\
+	gtkprinterpapi.h		\
+	gtkprintbackendpapi.h
+
+libprintbackend_papi_la_LDFLAGS =  -avoid-version -module $(no_undefined)
+libprintbackend_papi_la_LIBADD = $(LDADDS) -lpapi
diff --git a/modules/printbackends/papi/gtkprintbackendpapi.c b/modules/printbackends/papi/gtkprintbackendpapi.c
new file mode 100644
index 000000000..eb16e1553
--- /dev/null
+++ b/modules/printbackends/papi/gtkprintbackendpapi.c
@@ -0,0 +1,862 @@
+/* GTK - The GIMP Toolkit
+ * gtkprintbackendpapi.c: Default implementation of GtkPrintBackend 
+ * for printing to papi 
+ * Copyright (C) 2003, Red Hat, Inc.
+ * Copyright (C) 2009, Sun Microsystems, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <papi.h>
+
+#include <config.h>
+#include <errno.h>
+#include <cairo.h>
+#include <cairo-ps.h>
+
+#include <glib/gi18n-lib.h>
+
+#include "gtk.h"
+#include "gtkprintbackendpapi.h"
+#include "gtkprinterpapi.h"
+#include "gtkprinter-private.h"
+
+typedef struct _GtkPrintBackendPapiClass GtkPrintBackendPapiClass;
+
+#define GTK_PRINT_BACKEND_PAPI_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_PRINT_BACKEND_PAPI, GtkPrintBackendPapiClass))
+#define GTK_IS_PRINT_BACKEND_PAPI_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_PRINT_BACKEND_PAPI))
+#define GTK_PRINT_BACKEND_PAPI_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_PRINT_BACKEND_PAPI, GtkPrintBackendPapiClass))
+
+#define _PAPI_MAX_CHUNK_SIZE 8192
+
+static GType print_backend_papi_type = 0;
+
+struct _GtkPrintBackendPapiClass
+{
+  GtkPrintBackendClass parent_class;
+};
+
+struct _GtkPrintBackendPapi
+{
+  GtkPrintBackend parent_instance;
+
+  char *default_printer;  
+};
+
+typedef struct {
+  GtkPrinter *printer;
+} _PrinterStatus;
+
+static GObjectClass *backend_parent_class;
+
+static void                 gtk_print_backend_papi_class_init      (GtkPrintBackendPapiClass *class);
+static void                 gtk_print_backend_papi_init            (GtkPrintBackendPapi      *impl);
+static void                 gtk_print_backend_papi_finalize        (GObject                  *object);
+static void                 gtk_print_backend_papi_dispose         (GObject                  *object);
+static void                 papi_request_printer_list              (GtkPrintBackend          *print_backend);
+static gboolean 	    papi_get_printer_list 		   (GtkPrintBackendPapi      *papi_backend);
+static void                 papi_printer_request_details           (GtkPrinter               *printer);
+static GtkPrintCapabilities papi_printer_get_capabilities          (GtkPrinter               *printer);
+static void                 papi_printer_get_settings_from_options (GtkPrinter               *printer,
+								   GtkPrinterOptionSet       *options,
+								   GtkPrintSettings          *settings);
+static GtkPrinterOptionSet *papi_printer_get_options               (GtkPrinter               *printer,
+								   GtkPrintSettings          *settings,
+								   GtkPageSetup              *page_setup,
+								   GtkPrintCapabilities       capabilities);
+static void                 papi_printer_prepare_for_print         (GtkPrinter               *printer,
+								   GtkPrintJob               *print_job,
+								   GtkPrintSettings          *settings,
+								   GtkPageSetup              *page_setup);
+static cairo_surface_t *    papi_printer_create_cairo_surface      (GtkPrinter               *printer,
+								   GtkPrintSettings          *settings,
+								   gdouble                   width,
+								   gdouble                   height,
+								   GIOChannel                *cache_io);
+static void                 gtk_print_backend_papi_print_stream    (GtkPrintBackend          *print_backend,
+								   GtkPrintJob               *job,
+								   GIOChannel                *data_io,
+								   GtkPrintJobCompleteFunc   callback,
+								   gpointer                  user_data,
+								   GDestroyNotify            dnotify);
+
+static gboolean             papi_display_printer_status            (gpointer user_data);
+static void                 papi_display_printer_status_done       (gpointer user_data);
+
+static void
+gtk_print_backend_papi_register_type (GTypeModule *module)
+{
+  static const GTypeInfo print_backend_papi_info =
+  {
+    sizeof (GtkPrintBackendPapiClass),
+    NULL,		/* base_init */
+    NULL,		/* base_finalize */
+    (GClassInitFunc) gtk_print_backend_papi_class_init,
+    NULL,		/* class_finalize */
+    NULL,		/* class_data */
+    sizeof (GtkPrintBackendPapi),
+    0,		/* n_preallocs */
+    (GInstanceInitFunc) gtk_print_backend_papi_init,
+  };
+
+  print_backend_papi_type = g_type_module_register_type (module,
+                                                        GTK_TYPE_PRINT_BACKEND,
+                                                        "GtkPrintBackendPapi",
+                                                        &print_backend_papi_info, 0);
+}
+
+G_MODULE_EXPORT void 
+pb_module_init (GTypeModule *module)
+{
+  gtk_print_backend_papi_register_type (module);
+  gtk_printer_papi_register_type (module);
+}
+
+G_MODULE_EXPORT void 
+pb_module_exit (void)
+{
+
+}
+  
+G_MODULE_EXPORT GtkPrintBackend * 
+pb_module_create (void)
+{
+  return gtk_print_backend_papi_new ();
+}
+
+/*
+ * GtkPrintBackendPapi
+ */
+GType
+gtk_print_backend_papi_get_type (void)
+{
+  return print_backend_papi_type;
+}
+
+/**
+ * gtk_print_backend_papi_new:
+ *
+ * Creates a new #GtkPrintBackendPapi object. #GtkPrintBackendPapi
+ * implements the #GtkPrintBackend interface with direct access to
+ * the filesystem using Unix/Linux API calls
+ *
+ * Return value: the new #GtkPrintBackendPapi object
+ **/
+GtkPrintBackend *
+gtk_print_backend_papi_new (void)
+{
+  return g_object_new (GTK_TYPE_PRINT_BACKEND_PAPI, NULL);
+}
+
+static void
+gtk_print_backend_papi_class_init (GtkPrintBackendPapiClass *class)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (class);
+  GtkPrintBackendClass *backend_class = GTK_PRINT_BACKEND_CLASS (class);
+  
+  backend_parent_class = g_type_class_peek_parent (class);
+
+  gobject_class->finalize = gtk_print_backend_papi_finalize;
+  gobject_class->dispose = gtk_print_backend_papi_dispose;
+
+  backend_class->request_printer_list = papi_request_printer_list;
+  backend_class->printer_request_details = papi_printer_request_details;
+  backend_class->printer_get_capabilities = papi_printer_get_capabilities;
+  backend_class->printer_get_options = papi_printer_get_options;
+  backend_class->printer_get_settings_from_options = papi_printer_get_settings_from_options;
+  backend_class->printer_prepare_for_print = papi_printer_prepare_for_print;
+  backend_class->printer_create_cairo_surface = papi_printer_create_cairo_surface;
+  backend_class->print_stream = gtk_print_backend_papi_print_stream;
+}
+
+static cairo_status_t
+_cairo_write (void                *closure,
+              const unsigned char *data,
+              unsigned int         length)
+{
+  GIOChannel *io = (GIOChannel *)closure;
+  gsize written;
+  GError *error = NULL;
+
+  GTK_NOTE (PRINTING,
+            g_print ("PAPI Backend: Writting %i byte chunk to temp file\n", length));
+
+  while (length > 0) 
+    {
+      g_io_channel_write_chars (io, (char *)data, length, &written, &error);
+
+      if (error != NULL)
+	{
+	  GTK_NOTE (PRINTING,
+                     g_print ("PAPI Backend: Error writting to temp file, %s\n", error->message));
+
+          g_error_free (error);
+	  return CAIRO_STATUS_WRITE_ERROR;
+	}    
+
+      GTK_NOTE (PRINTING,
+                g_print ("PAPI Backend: Wrote %i bytes to temp file\n", written));
+
+      data += written;
+      length -= written;
+    }
+
+  return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_surface_t *
+papi_printer_create_cairo_surface (GtkPrinter       *printer,
+				  GtkPrintSettings *settings,
+				  gdouble           width, 
+				  gdouble           height,
+				  GIOChannel       *cache_io)
+{
+  cairo_surface_t *surface;
+  
+  surface = cairo_ps_surface_create_for_stream (_cairo_write, cache_io, width, height);
+
+  /* TODO: DPI from settings object? */
+  cairo_surface_set_fallback_resolution (surface, 300, 300);
+
+  return surface;
+}
+
+typedef struct {
+  GtkPrintBackend *backend;
+  GtkPrintJobCompleteFunc callback;
+  GtkPrintJob *job;
+  gpointer user_data;
+  GDestroyNotify dnotify;
+
+  papi_service_t service;
+  papi_stream_t stream;
+} _PrintStreamData;
+
+static void
+papi_print_cb (GtkPrintBackendPapi *print_backend,
+              GError             *error,
+              gpointer            user_data)
+{
+  _PrintStreamData *ps = (_PrintStreamData *) user_data;
+
+  if (ps->callback)
+    ps->callback (ps->job, ps->user_data, error);
+
+  if (ps->dnotify)
+    ps->dnotify (ps->user_data);
+
+  gtk_print_job_set_status (ps->job, 
+			    error ? GTK_PRINT_STATUS_FINISHED_ABORTED 
+			          : GTK_PRINT_STATUS_FINISHED);
+
+  if (ps->job)
+    g_object_unref (ps->job);
+  
+  g_free (ps);
+}
+
+static gboolean
+papi_write (GIOChannel   *source,
+           GIOCondition  con,
+           gpointer      user_data)
+{
+  gchar buf[_PAPI_MAX_CHUNK_SIZE];
+  gsize bytes_read;
+  GError *error;
+  GIOStatus status;
+  _PrintStreamData *ps = (_PrintStreamData *) user_data;
+  papi_job_t job = NULL;
+
+  error = NULL;
+  status = g_io_channel_read_chars (source,
+                                    buf,
+                                    _PAPI_MAX_CHUNK_SIZE,
+                                    &bytes_read,
+                                    &error);
+
+  /* Keep writing to PAPI input stream while there are data */
+  if (status != G_IO_STATUS_ERROR)
+  {
+     papiJobStreamWrite (ps->service, ps->stream, buf, bytes_read);
+  }
+  
+  /* Finish reading input stream data. Closing the stream and handle to service */
+  if (bytes_read == 0) {
+     papiJobStreamClose (ps->service, ps->stream, &job);
+     ps->stream = NULL;
+     papiJobFree (job);
+     papiServiceDestroy (ps->service);
+     ps->service = NULL;
+  }
+
+  if (error != NULL || status == G_IO_STATUS_EOF)
+    {
+      papi_print_cb (GTK_PRINT_BACKEND_PAPI (ps->backend), 
+		    error, user_data);
+
+      if (error)
+	g_error_free (error);
+
+      if (error != NULL)
+        {
+          GTK_NOTE (PRINTING,
+                    g_print ("PAPI Backend: %s\n", error->message));
+
+          g_error_free (error);
+        } 
+
+      return FALSE;
+    }
+
+  GTK_NOTE (PRINTING,
+            g_print ("PAPI Backend: Writting %i byte chunk to papi pipe\n", bytes_read));
+
+  return TRUE;
+}
+
+static void
+gtk_print_backend_papi_print_stream (GtkPrintBackend        *print_backend,
+				    GtkPrintJob            *job,
+				    GIOChannel             *data_io,
+				    GtkPrintJobCompleteFunc callback,
+				    gpointer                user_data,
+				    GDestroyNotify          dnotify)
+{
+  GError *print_error = NULL;
+  GtkPrinterPapi *printer;
+  _PrintStreamData *ps;
+  GtkPrintSettings *settings;
+  gint argc;  
+  gint in_fd;
+  gchar **argv = NULL; 
+  const gchar *title;
+  char *prtnm = NULL;
+  GtkPrintDuplex val;
+  papi_status_t pstatus = NULL;
+  papi_attribute_t **attrs = NULL;
+  papi_job_ticket_t *ticket = NULL;
+  
+  printer = GTK_PRINTER_PAPI (gtk_print_job_get_printer (job));
+  settings = gtk_print_job_get_settings (job);
+
+  /* FIXME - the title should be set as the job-name */
+  title = gtk_print_job_get_title (job);
+
+  ps = g_new0 (_PrintStreamData, 1);
+  ps->callback = callback;
+  ps->user_data = user_data;
+  ps->dnotify = dnotify;
+  ps->job = g_object_ref (job);
+  ps->service = NULL;
+  ps->stream = NULL;
+
+   /* This cannot be queried yet with the current API */
+  papiAttributeListAddString (&attrs, PAPI_ATTR_EXCL, "document-format", "application/postscript");
+  val =  gtk_print_settings_get_duplex (settings) ;
+  if (val == GTK_PRINT_DUPLEX_HORIZONTAL)
+    papiAttributeListAddString (&attrs, PAPI_ATTR_EXCL, "Duplex", "DuplexNoTumble");
+  else if (val == GTK_PRINT_DUPLEX_VERTICAL)
+    papiAttributeListAddString (&attrs, PAPI_ATTR_EXCL, "Duplex", "DuplexTumble");
+
+  if (job->num_copies > 1) 
+    {
+      papiAttributeListAddInteger (&attrs, PAPI_ATTR_EXCL, "copies", job->num_copies); 
+    }
+
+  prtnm = strdup (gtk_printer_get_name (GTK_PRINTER(printer)));
+
+  if (papiServiceCreate (&(ps->service), prtnm, NULL, NULL, NULL,
+                         PAPI_ENCRYPT_NEVER, NULL) != PAPI_OK)
+    return;
+
+  pstatus = papiJobStreamOpen (ps->service, prtnm, attrs, ticket, &(ps->stream));
+  if (pstatus != PAPI_OK)
+    {
+      papiServiceDestroy (ps->service);
+      ps->service = NULL;
+      return;
+    }
+
+  /* Everything set up fine, so get ready to wait for input data stream */
+  g_io_add_watch (data_io,
+                  G_IO_IN | G_IO_PRI | G_IO_ERR | G_IO_HUP,
+                  (GIOFunc) papi_write,
+                  ps);
+}
+
+
+static void
+_papi_set_default_printer (GtkPrintBackendPapi *backend)
+{
+  char *def_printer = NULL;
+  char *_default_attr[] = { "printer-name", NULL };
+  papi_service_t service = NULL;
+  papi_printer_t default_printer = NULL;
+  papi_attribute_t **attrs = NULL;
+
+  if (papiServiceCreate (&service, NULL, NULL, NULL, NULL, PAPI_ENCRYPT_NEVER,
+                          NULL) != PAPI_OK)
+    return;
+
+  if (papiPrinterQuery (service, "_default", _default_attr, NULL, 
+                        &default_printer) == PAPI_OK)  
+    {
+      if (default_printer != NULL)  
+        {
+          attrs = papiPrinterGetAttributeList (default_printer);
+
+          if (attrs != NULL)
+            if (papiAttributeListGetString (attrs, NULL, "printer-name", 
+                                            &def_printer) == PAPI_OK) 
+	      {
+	        backend->default_printer = strdup (def_printer);
+	      }
+        }
+    }
+
+  papiPrinterFree (default_printer);
+  papiServiceDestroy (service);
+}
+
+static void
+gtk_print_backend_papi_init (GtkPrintBackendPapi *backend)
+{
+  _papi_set_default_printer (backend);
+}
+
+static void
+gtk_print_backend_papi_finalize (GObject *object)
+{
+  GtkPrintBackendPapi *backend_papi;
+
+  GTK_NOTE (PRINTING,
+            g_print ("PAPI Backend: finalizing PAPI backend module\n"));
+
+  backend_papi = GTK_PRINT_BACKEND_PAPI (object);
+
+  g_free (backend_papi->default_printer);
+  backend_papi->default_printer = NULL;
+
+  backend_parent_class->finalize (object);
+}
+
+
+static void
+gtk_print_backend_papi_dispose (GObject *object)
+{
+  GtkPrintBackendPapi *backend_papi;
+
+  GTK_NOTE (PRINTING,
+            g_print ("PAPI Backend: %s\n", G_STRFUNC));
+
+  backend_papi = GTK_PRINT_BACKEND_PAPI (object);
+
+  backend_parent_class->dispose (object);
+}
+
+char **
+get_all_list(papi_service_t svc)
+{
+        papi_status_t status;
+        papi_printer_t printer = NULL;
+        char *attr[] = { "member-names", NULL };
+        char **names = NULL;
+
+        status = papiPrinterQuery(svc, "_all", attr, NULL, &printer);
+        if ((status == PAPI_OK) && (printer != NULL)) {
+                papi_attribute_t **attributes =
+                                        papiPrinterGetAttributeList(printer);
+                if (attributes != NULL) {
+                        void *iter = NULL;
+                        char *member = NULL;
+
+                        for (status = papiAttributeListGetString(attributes,
+                                                &iter, "member-names", &member);
+                                status == PAPI_OK;
+                                status = papiAttributeListGetString(attributes,
+                                                &iter, NULL, &member))
+                                        list_append(&names, strdup(member));
+                }
+                papiPrinterFree(printer);
+        }
+
+        return (names);
+}
+
+static char **
+get_printers_list(papi_service_t svc)
+{
+	papi_status_t status;
+    	papi_printer_t *printers = NULL;
+    	char *keys[] = { "printer-name", "printer-uri-supported", NULL };
+    	char **names = NULL;
+
+	status = papiPrintersList(svc, keys, NULL, &printers);
+	if ((status == PAPI_OK) && (printers != NULL)) {
+		int i;
+
+		for (i = 0; printers[i] != NULL; i++) {
+			papi_attribute_t **attributes =
+				papiPrinterGetAttributeList(printers[i]);
+    			char *name = NULL;
+			
+			(void) papiAttributeListGetString(attributes, NULL,
+							"printer-name", &name);
+			if ((name != NULL) && (strcmp(name, "_default") != 0))
+    				list_append(&names, strdup(name));
+    		}
+    		papiPrinterListFree(printers);
+    	}
+    
+    	return (names);
+}
+
+static void
+papi_request_printer_list (GtkPrintBackend *backend)
+{
+  GtkPrintBackendPapi *papi_backend;
+
+  papi_backend = GTK_PRINT_BACKEND_PAPI (backend);
+
+  /* Get the list of printers using papi API */
+  papi_get_printer_list (papi_backend); 
+}
+
+static gboolean
+papi_get_printer_list (GtkPrintBackendPapi *papi_backend)
+{
+  int i;
+  const char *attributes[] =  /* Attributes we're interested in */
+    {
+      "printer-name",
+      "printer-uri-supported",
+      NULL
+    };
+  papi_status_t status, status2;
+  papi_service_t service = NULL;
+  char **printers = NULL;
+  GtkPrinter *printer;
+  GtkPrinterPapi *papi_printer;
+  GList *current_printer_list;
+  GtkPrintBackend *backend = GTK_PRINT_BACKEND (papi_backend);
+  
+  if ((status = papiServiceCreate (&service, NULL, NULL, NULL, NULL,
+		PAPI_ENCRYPT_NEVER, NULL)) != PAPI_OK)
+    return FALSE; 
+
+  if ((printers = get_all_list (service)) == NULL) 
+    {
+      printers = get_printers_list (service);
+    }
+
+  if (printers == NULL) 
+    {
+      papiServiceDestroy (service);
+      return FALSE;
+    }
+
+  for (i = 0; printers[i] != NULL; i++) 
+    {
+      GtkPrinter *printer;
+      char *name = NULL, *url = NULL;
+      papi_attribute_t **attrs = NULL;
+
+          printer = gtk_print_backend_find_printer (backend, printers[i]);
+
+	  if (!printer) 
+	    {
+              /* skip null printer name just in case */
+              if (printers[i] == NULL)
+                continue;
+
+	      /* skip the alias _default and _all printers */
+      	      if (strcmp(printers[i], "_default")==0 || strcmp(printers[i], "_all")==0)
+	        continue;	
+
+	      papi_printer = gtk_printer_papi_new (printers[i], backend);
+	      printer = GTK_PRINTER (papi_printer);
+
+	      /* Only marked default printer to not have details so that
+		 the request_details method will be called  at start up
+	       */
+
+	      if (papi_backend->default_printer != NULL)
+	        if (strcmp (printers[i], papi_backend->default_printer)==0)
+		  {
+		    gtk_printer_set_is_default (printer, TRUE);
+	  	  }	
+
+              gtk_printer_set_icon_name (printer, "gtk-print");
+	      gtk_print_backend_add_printer (backend, printer);
+              gtk_printer_set_is_active (printer, TRUE);
+
+  	      /* gtk_printer_set_has_details (printer, TRUE); */
+	    }
+    	  else 
+            g_object_ref (printer);
+
+      if (!gtk_printer_is_active (printer))
+        {
+          gtk_printer_set_is_active (printer, TRUE);
+          gtk_printer_set_is_new (printer, TRUE);
+        }
+
+      if (gtk_printer_is_new (printer))
+        {
+          g_signal_emit_by_name (backend, "printer-added", printer);
+          gtk_printer_set_is_new (printer, FALSE);
+        }
+
+      g_object_unref (printer);
+    }
+
+  free (printers);
+  papiServiceDestroy (service);
+
+  /* To set that the list of printers added is complete */
+  gtk_print_backend_set_list_done (backend); 
+
+  return TRUE;
+}
+
+static void
+update_printer_status (GtkPrinter *printer)
+{
+  GtkPrintBackend *backend;
+  GtkPrinterPapi *papi_printer;
+  gboolean status_changed = FALSE;
+
+  backend = gtk_printer_get_backend (printer);
+  papi_printer = GTK_PRINTER_PAPI (printer);
+
+  /* if (status_changed) */
+    g_signal_emit_by_name (GTK_PRINT_BACKEND (backend),
+                           "printer-status-changed", printer);
+
+}
+
+
+static GtkPrinterOptionSet *
+papi_printer_get_options (GtkPrinter           *printer,
+			  GtkPrintSettings     *settings,
+			  GtkPageSetup         *page_setup,
+			  GtkPrintCapabilities  capabilities)
+{
+  GtkPrinterOptionSet *set;
+  GtkPrinterOption *option;
+  int i;
+  char *print_at[] = { "now", "on-hold" };
+  char *n_up[] = {"1"};
+
+  /* Update the printer status before the printer options are displayed */
+  update_printer_status (printer); 
+
+  set = gtk_printer_option_set_new ();
+
+  /* non-ppd related settings */
+
+  /* This maps to number-up-supported in PAPI. FIXME 
+   * number-up-default is the default value. 
+   * number-up-supported is the list of number of able to print per page 
+   */
+  option = gtk_printer_option_new ("gtk-n-up", "Pages Per Sheet", GTK_PRINTER_OPTION_TYPE_PICKONE);
+  gtk_printer_option_choices_from_array (option, G_N_ELEMENTS (n_up),
+					 n_up, n_up);
+  gtk_printer_option_set (option, "1");
+  gtk_printer_option_set_add (set, option);
+  g_object_unref (option);
+
+  /* This maps to job-priority-supported and job-priority-default in PAPI - FIXME*/
+  
+  /* This relates to job-sheets-supported in PAPI  FIXME*/
+  
+  /* This relates to job-hold-until-supported in PAPI */
+  option = gtk_printer_option_new ("gtk-print-time", "Print at", GTK_PRINTER_OPTION_TYPE_PICKONE);
+  gtk_printer_option_choices_from_array (option, G_N_ELEMENTS (print_at),
+					 print_at, print_at);
+  gtk_printer_option_set (option, "now");
+  gtk_printer_option_set_add (set, option);
+  g_object_unref (option);
+  
+  return set;
+}
+
+static void
+papi_printer_get_settings_from_options (GtkPrinter          *printer,
+				       GtkPrinterOptionSet *options,
+				       GtkPrintSettings    *settings)
+{
+  GtkPrinterOption *option;
+
+  option = gtk_printer_option_set_lookup (options, "gtk-n-up");
+  if (option)
+     gtk_print_settings_set (settings, GTK_PRINT_SETTINGS_NUMBER_UP, option->value);
+
+}
+
+static void
+papi_printer_prepare_for_print (GtkPrinter       *printer,
+			       GtkPrintJob      *print_job,
+			       GtkPrintSettings *settings,
+			       GtkPageSetup     *page_setup)
+{
+  GtkPageSet page_set;
+  double scale;
+  GtkPaperSize *papersize = NULL;
+  char *ppd_paper_name;
+
+  print_job->print_pages = gtk_print_settings_get_print_pages (settings);
+  print_job->page_ranges = NULL;
+  print_job->num_page_ranges = 0;
+  
+  if (print_job->print_pages == GTK_PRINT_PAGES_RANGES)
+    print_job->page_ranges =
+      gtk_print_settings_get_page_ranges (settings,
+					  &print_job->num_page_ranges);
+  
+  print_job->collate = gtk_print_settings_get_collate (settings);
+  print_job->reverse = gtk_print_settings_get_reverse (settings);
+  print_job->num_copies = gtk_print_settings_get_n_copies (settings);
+ 
+  scale = gtk_print_settings_get_scale (settings);
+  if (scale != 100.0)
+    print_job->scale = scale/100.0;
+
+  papersize = gtk_page_setup_get_paper_size (page_setup);
+  ppd_paper_name = gtk_paper_size_get_ppd_name (papersize);
+
+  page_set = gtk_print_settings_get_page_set (settings);
+  if (page_set == GTK_PAGE_SET_EVEN)
+    print_job->page_set = GTK_PAGE_SET_EVEN;
+  else if (page_set == GTK_PAGE_SET_ODD)
+    print_job->page_set = GTK_PAGE_SET_ODD;
+  else
+    print_job->page_set = GTK_PAGE_SET_ALL;
+
+  print_job->rotate_to_orientation = TRUE;
+
+}
+
+gboolean
+is_local_printer (gchar *printer_uri)
+{
+  if (strncmp (printer_uri, "lpsched:", 8) == 0)
+    return TRUE;
+  else
+    return FALSE;
+}
+
+void
+merge_ppd_data (papi_attribute_t ***attributes, gchar *ppdfile)
+{
+  get_ppd_attrs (attributes, ppdfile);
+}
+
+
+static void
+papi_display_printer_status_done (gpointer user_data)
+{
+  GtkPrinter *printer = (GtkPrinter *) user_data;
+  GtkPrinterPapi *papi_printer;
+
+  g_signal_emit_by_name (printer, "details-acquired", TRUE); 
+  papi_printer = GTK_PRINTER_PAPI (printer);
+  return;
+}
+
+#define IDLE 3
+#define PROCESSING 4
+#define STOPPED 5
+static gboolean
+papi_display_printer_status (gpointer user_data)
+{
+  GtkPrinter *printer = (GtkPrinter *) user_data;
+  GtkPrinterPapi *papi_printer;
+  gchar *loc, *printer_uri, *ppdfile;
+  int state;
+  papi_service_t service;
+  papi_attribute_t **attrs = NULL;
+  papi_printer_t current_printer = NULL;
+  static int count = 0;
+
+  papi_printer = GTK_PRINTER_PAPI (printer);
+  if (papiServiceCreate (&service, NULL, NULL, NULL, NULL, PAPI_ENCRYPT_NEVER,
+                          NULL) != PAPI_OK)
+    return FALSE;
+
+  if (papiPrinterQuery (service, papi_printer->printer_name, NULL, NULL,
+                        &current_printer) != PAPI_OK) 
+    {
+       /* SUN_BRANDING */
+       gtk_printer_set_state_message (printer, _("printer offline"));
+    }
+
+  if (current_printer != NULL)
+    {
+        attrs = papiPrinterGetAttributeList (current_printer);
+    }
+
+  if (papiAttributeListGetString (attrs, NULL, "printer-info", &loc) == PAPI_OK)
+    {
+        gtk_printer_set_location (printer, loc);
+    }
+
+  if (papiAttributeListGetInteger (attrs, NULL, "printer-state", &state) == PAPI_OK)
+    {
+      switch (state) 
+        {
+	  /* SUN_BRANDING */
+	  case IDLE: gtk_printer_set_state_message (printer, _("ready to print"));
+		     break;
+	  /* SUN_BRANDING */
+	  case PROCESSING: gtk_printer_set_state_message (printer, _("processing job"));
+		           break;
+
+	  /* SUN_BRANDING */
+	  case STOPPED: gtk_printer_set_state_message (printer, _("paused"));
+		        break;
+	  /* SUN_BRANDING */
+	  default: gtk_printer_set_state_message (printer, _("unknown"));
+		   break;
+        }
+    }
+
+  papiPrinterFree (current_printer);
+  papiServiceDestroy (service);
+  gtk_printer_set_has_details (printer, TRUE);
+
+  return FALSE;
+}
+
+static void  
+papi_printer_request_details (GtkPrinter *printer)
+{
+  g_idle_add_full (G_PRIORITY_DEFAULT_IDLE, papi_display_printer_status, printer, papi_display_printer_status_done); 
+}
+
+
+static GtkPrintCapabilities
+papi_printer_get_capabilities (GtkPrinter *printer)
+{
+  return GTK_PRINT_CAPABILITY_COPIES | GTK_PRINT_CAPABILITY_PAGE_SET ; 
+}
+
diff --git a/modules/printbackends/papi/gtkprintbackendpapi.h b/modules/printbackends/papi/gtkprintbackendpapi.h
new file mode 100644
index 000000000..4eba665e0
--- /dev/null
+++ b/modules/printbackends/papi/gtkprintbackendpapi.h
@@ -0,0 +1,44 @@
+/* GTK - The GIMP Toolkit
+ * gtkprintbackendpapi.h: Default implementation of GtkPrintBackend 
+ * for printing to papi 
+ * Copyright (C) 2003, Red Hat, Inc.
+ * Copyright (C) 2009, Sun Microsystems, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GTK_PRINT_BACKEND_PAPI_H__
+#define __GTK_PRINT_BACKEND_PAPI_H__
+
+#include <glib-object.h>
+#include "gtkprintbackend.h"
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_PRINT_BACKEND_PAPI            (gtk_print_backend_papi_get_type ())
+#define GTK_PRINT_BACKEND_PAPI(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_PRINT_BACKEND_PAPI, GtkPrintBackendPapi))
+#define GTK_IS_PRINT_BACKEND_PAPI(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_PRINT_BACKEND_PAPI))
+
+typedef struct _GtkPrintBackendPapi      GtkPrintBackendPapi;
+
+GtkPrintBackend *gtk_print_backend_papi_new      (void);
+GType          gtk_print_backend_papi_get_type (void) G_GNUC_CONST;
+
+G_END_DECLS
+
+#endif /* __GTK_PRINT_BACKEND_PAPI_H__ */
+
+
diff --git a/modules/printbackends/papi/gtkprinterpapi.c b/modules/printbackends/papi/gtkprinterpapi.c
new file mode 100644
index 000000000..387bc30be
--- /dev/null
+++ b/modules/printbackends/papi/gtkprinterpapi.c
@@ -0,0 +1,116 @@
+/* GtkPrinterPapi
+ * Copyright (C) 2006 John (J5) Palmieri  <johnp@redhat.com>
+ * Copyright (C) 2009 Ghee Teo <ghee.teo@sun.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+#include "gtkprinterpapi.h"
+
+static void gtk_printer_papi_init       (GtkPrinterPapi      *printer);
+static void gtk_printer_papi_class_init (GtkPrinterPapiClass *class);
+static void gtk_printer_papi_finalize   (GObject             *object);
+
+static GtkPrinterClass *gtk_printer_papi_parent_class;
+static GType gtk_printer_papi_type = 0;
+
+void 
+gtk_printer_papi_register_type (GTypeModule *module)
+{
+  static const GTypeInfo object_info =
+  {
+    sizeof (GtkPrinterPapiClass),
+    (GBaseInitFunc) NULL,
+    (GBaseFinalizeFunc) NULL,
+    (GClassInitFunc) gtk_printer_papi_class_init,
+    NULL,           /* class_finalize */
+    NULL,           /* class_data */
+    sizeof (GtkPrinterPapi),
+    0,              /* n_preallocs */
+    (GInstanceInitFunc) gtk_printer_papi_init,
+  };
+
+ gtk_printer_papi_type = g_type_module_register_type (module,
+                                                      GTK_TYPE_PRINTER,
+                                                      "GtkPrinterPapi",
+                                                      &object_info, 0);
+}
+
+GType
+gtk_printer_papi_get_type (void)
+{
+  return gtk_printer_papi_type;
+}
+
+static void
+gtk_printer_papi_class_init (GtkPrinterPapiClass *class)
+{
+  GObjectClass *object_class = (GObjectClass *) class;
+	
+  gtk_printer_papi_parent_class = g_type_class_peek_parent (class);
+
+  object_class->finalize = gtk_printer_papi_finalize;
+}
+
+static void
+gtk_printer_papi_init (GtkPrinterPapi *printer)
+{
+  printer->printer_name = NULL;
+}
+
+static void
+gtk_printer_papi_finalize (GObject *object)
+{
+  GtkPrinterPapi *printer;
+
+  g_return_if_fail (object != NULL);
+
+  printer = GTK_PRINTER_PAPI (object);
+
+  g_free(printer->printer_name);
+
+  G_OBJECT_CLASS (gtk_printer_papi_parent_class)->finalize (object);
+}
+
+/**
+ * gtk_printer_papi_new:
+ *
+ * Creates a new #GtkPrinterPapi.
+ *
+ * Return value: a new #GtkPrinterPapi
+ *
+ * Since: 2.10
+ **/
+GtkPrinterPapi *
+gtk_printer_papi_new (const char      *name,
+		      GtkPrintBackend *backend)
+{
+  GObject *result;
+  GtkPrinterPapi *pp;
+  
+  result = g_object_new (GTK_TYPE_PRINTER_PAPI,
+			 "name", name,
+			 "backend", backend,
+			 "is-virtual", TRUE,
+                         NULL);
+  pp = GTK_PRINTER_PAPI(result);
+
+  pp->printer_name = g_strdup (name);
+
+  return (GtkPrinterPapi *) pp;
+}
+
diff --git a/modules/printbackends/papi/gtkprinterpapi.h b/modules/printbackends/papi/gtkprinterpapi.h
new file mode 100644
index 000000000..300cf1711
--- /dev/null
+++ b/modules/printbackends/papi/gtkprinterpapi.h
@@ -0,0 +1,61 @@
+/* GtkPrinterPapi
+ * Copyright (C) 2006 John (J5) Palmieri <johnp@redhat.com>
+ * Copyright (C) 2009 Ghee Teo <ghee.teo@sun.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+#ifndef __GTK_PRINTER_PAPI_H__
+#define __GTK_PRINTER_PAPI_H__
+
+#include <glib.h>
+#include <glib-object.h>
+#include <papi.h>
+
+#include "gtkunixprint.h"
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_PRINTER_PAPI                  (gtk_printer_papi_get_type ())
+#define GTK_PRINTER_PAPI(obj)                  (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_PRINTER_PAPI, GtkPrinterPapi))
+#define GTK_PRINTER_PAPI_CLASS(klass)          (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_PRINTER_PAPI, GtkPrinterPapiClass))
+#define GTK_IS_PRINTER_PAPI(obj)               (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_PRINTER_PAPI))
+#define GTK_IS_PRINTER_PAPI_CLASS(klass)       (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_PRINTER_PAPI))
+#define GTK_PRINTER_PAPI_GET_CLASS(obj)        (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_PRINTER_PAPI, GtkPrinterPapiClass))
+
+typedef struct _GtkPrinterPapi	        GtkPrinterPapi;
+typedef struct _GtkPrinterPapiClass     GtkPrinterPapiClass;
+typedef struct _GtkPrinterPapiPrivate   GtkPrinterPapiPrivate;
+
+struct _GtkPrinterPapi
+{
+  GtkPrinter parent_instance;
+
+  gchar *printer_name;
+};
+
+struct _GtkPrinterPapiClass
+{
+  GtkPrinterClass parent_class;
+
+};
+
+GType                    gtk_printer_papi_get_type      (void) G_GNUC_CONST;
+void                     gtk_printer_papi_register_type (GTypeModule     *module);
+GtkPrinterPapi          *gtk_printer_papi_new           (const char      *name, GtkPrintBackend *backend);
+
+G_END_DECLS
+
+#endif /* __GTK_PRINTER_PAPI_H__ */