/* GTK - The GIMP Toolkit * gtkprintbackendlpr.c: LPR implementation of GtkPrintBackend * for printing to lpr * Copyright (C) 2006, 2007 Red Hat, 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 "config.h" #include #include #include #include #include #include #include #include #include #include #include #include "gtkprinter-private.h" #include "gtkprintbackendlpr.h" typedef struct _GtkPrintBackendLprClass GtkPrintBackendLprClass; #define GTK_PRINT_BACKEND_LPR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_PRINT_BACKEND_LPR, GtkPrintBackendLprClass)) #define GTK_IS_PRINT_BACKEND_LPR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_PRINT_BACKEND_LPR)) #define GTK_PRINT_BACKEND_LPR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_PRINT_BACKEND_LPR, GtkPrintBackendLprClass)) #define _LPR_MAX_CHUNK_SIZE 8192 static GType print_backend_lpr_type = 0; struct _GtkPrintBackendLprClass { GtkPrintBackendClass parent_class; }; struct _GtkPrintBackendLpr { GtkPrintBackend parent_instance; }; static GObjectClass *backend_parent_class; static void gtk_print_backend_lpr_class_init (GtkPrintBackendLprClass *class); static void gtk_print_backend_lpr_init (GtkPrintBackendLpr *impl); static void lpr_printer_get_settings_from_options (GtkPrinter *printer, GtkPrinterOptionSet *options, GtkPrintSettings *settings); static GtkPrinterOptionSet *lpr_printer_get_options (GtkPrinter *printer, GtkPrintSettings *settings, GtkPageSetup *page_setup, GtkPrintCapabilities capabilities); static void lpr_printer_prepare_for_print (GtkPrinter *printer, GtkPrintJob *print_job, GtkPrintSettings *settings, GtkPageSetup *page_setup); static cairo_surface_t * lpr_printer_create_cairo_surface (GtkPrinter *printer, GtkPrintSettings *settings, gdouble width, gdouble height, GIOChannel *cache_io); static void gtk_print_backend_lpr_print_stream (GtkPrintBackend *print_backend, GtkPrintJob *job, GIOChannel *data_io, GtkPrintJobCompleteFunc callback, gpointer user_data, GDestroyNotify dnotify); static void gtk_print_backend_lpr_register_type (GTypeModule *module) { const GTypeInfo print_backend_lpr_info = { sizeof (GtkPrintBackendLprClass), NULL, /* base_init */ NULL, /* base_finalize */ (GClassInitFunc) gtk_print_backend_lpr_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (GtkPrintBackendLpr), 0, /* n_preallocs */ (GInstanceInitFunc) gtk_print_backend_lpr_init, }; print_backend_lpr_type = g_type_module_register_type (module, GTK_TYPE_PRINT_BACKEND, "GtkPrintBackendLpr", &print_backend_lpr_info, 0); } G_MODULE_EXPORT void pb_module_init (GTypeModule *module) { gtk_print_backend_lpr_register_type (module); } G_MODULE_EXPORT void pb_module_exit (void) { } G_MODULE_EXPORT GtkPrintBackend * pb_module_create (void) { return gtk_print_backend_lpr_new (); } /* * GtkPrintBackendLpr */ GType gtk_print_backend_lpr_get_type (void) { return print_backend_lpr_type; } /** * gtk_print_backend_lpr_new: * * Creates a new #GtkPrintBackendLpr object. #GtkPrintBackendLpr * implements the #GtkPrintBackend interface with direct access to * the filesystem using Unix/Linux API calls * * Return value: the new #GtkPrintBackendLpr object **/ GtkPrintBackend * gtk_print_backend_lpr_new (void) { return g_object_new (GTK_TYPE_PRINT_BACKEND_LPR, NULL); } static void gtk_print_backend_lpr_class_init (GtkPrintBackendLprClass *class) { GtkPrintBackendClass *backend_class = GTK_PRINT_BACKEND_CLASS (class); backend_parent_class = g_type_class_peek_parent (class); backend_class->print_stream = gtk_print_backend_lpr_print_stream; backend_class->printer_create_cairo_surface = lpr_printer_create_cairo_surface; backend_class->printer_get_options = lpr_printer_get_options; backend_class->printer_get_settings_from_options = lpr_printer_get_settings_from_options; backend_class->printer_prepare_for_print = lpr_printer_prepare_for_print; } static cairo_status_t _cairo_write (void *closure, const unsigned char *data, unsigned int length) { GIOChannel *io = (GIOChannel *)closure; gsize written; GError *error; error = NULL; GTK_NOTE (PRINTING, g_print ("LPR Backend: Writting %i byte chunk to temp file\n", length)); while (length > 0) { g_io_channel_write_chars (io, (const gchar*)data, length, &written, &error); if (error != NULL) { GTK_NOTE (PRINTING, g_print ("LPR Backend: Error writting to temp file, %s\n", error->message)); g_error_free (error); return CAIRO_STATUS_WRITE_ERROR; } GTK_NOTE (PRINTING, g_print ("LPR Backend: Wrote %" G_GSIZE_FORMAT " bytes to temp file\n", written)); data += written; length -= written; } return CAIRO_STATUS_SUCCESS; } static cairo_surface_t * lpr_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); cairo_surface_set_fallback_resolution (surface, 2.0 * gtk_print_settings_get_printer_lpi (settings), 2.0 * gtk_print_settings_get_printer_lpi (settings)); return surface; } typedef struct { GtkPrintBackend *backend; GtkPrintJobCompleteFunc callback; GtkPrintJob *job; gpointer user_data; GDestroyNotify dnotify; GIOChannel *in; } _PrintStreamData; static void lpr_print_cb (GtkPrintBackendLpr *print_backend, GError *error, gpointer user_data) { _PrintStreamData *ps = (_PrintStreamData *) user_data; if (ps->in != NULL) g_io_channel_unref (ps->in); 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 lpr_write (GIOChannel *source, GIOCondition con, gpointer user_data) { gchar buf[_LPR_MAX_CHUNK_SIZE]; gsize bytes_read; GError *error; GIOStatus status; _PrintStreamData *ps = (_PrintStreamData *) user_data; error = NULL; status = g_io_channel_read_chars (source, buf, _LPR_MAX_CHUNK_SIZE, &bytes_read, &error); if (status != G_IO_STATUS_ERROR) { gsize bytes_written; g_io_channel_write_chars (ps->in, buf, bytes_read, &bytes_written, &error); } if (error != NULL || status == G_IO_STATUS_EOF) { lpr_print_cb (GTK_PRINT_BACKEND_LPR (ps->backend), error, user_data); if (error != NULL) { GTK_NOTE (PRINTING, g_print ("LPR Backend: %s\n", error->message)); g_error_free (error); } return FALSE; } GTK_NOTE (PRINTING, g_print ("LPR Backend: Writting %" G_GSIZE_FORMAT " byte chunk to lpr pipe\n", bytes_read)); return TRUE; } #define LPR_COMMAND "lpr" static void gtk_print_backend_lpr_print_stream (GtkPrintBackend *print_backend, GtkPrintJob *job, GIOChannel *data_io, GtkPrintJobCompleteFunc callback, gpointer user_data, GDestroyNotify dnotify) { GError *print_error = NULL; _PrintStreamData *ps; GtkPrintSettings *settings; gint argc; gint in_fd; gchar **argv = NULL; const char *cmd_line; settings = gtk_print_job_get_settings (job); cmd_line = gtk_print_settings_get (settings, "lpr-commandline"); if (cmd_line == NULL) cmd_line = LPR_COMMAND; ps = g_new0 (_PrintStreamData, 1); ps->callback = callback; ps->user_data = user_data; ps->dnotify = dnotify; ps->job = g_object_ref (job); ps->in = NULL; /* spawn lpr with pipes and pipe ps file to lpr */ if (!g_shell_parse_argv (cmd_line, &argc, &argv, &print_error)) goto out; if (!g_spawn_async_with_pipes (NULL, argv, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL, NULL, &in_fd, NULL, NULL, &print_error)) goto out; ps->in = g_io_channel_unix_new (in_fd); g_io_channel_set_encoding (ps->in, NULL, &print_error); if (print_error != NULL) { if (ps->in != NULL) g_io_channel_unref (ps->in); goto out; } g_io_channel_set_close_on_unref (ps->in, TRUE); g_io_add_watch (data_io, G_IO_IN | G_IO_PRI | G_IO_ERR | G_IO_HUP, (GIOFunc) lpr_write, ps); out: if (argv != NULL) g_strfreev (argv); if (print_error != NULL) { lpr_print_cb (GTK_PRINT_BACKEND_LPR (print_backend), print_error, ps); g_error_free (print_error); } } static void gtk_print_backend_lpr_init (GtkPrintBackendLpr *backend) { GtkPrinter *printer; printer = gtk_printer_new (_("Print to LPR"), GTK_PRINT_BACKEND (backend), TRUE); gtk_printer_set_has_details (printer, TRUE); gtk_printer_set_icon_name (printer, "printer"); gtk_printer_set_is_active (printer, TRUE); gtk_printer_set_is_default (printer, TRUE); gtk_print_backend_add_printer (GTK_PRINT_BACKEND (backend), printer); g_object_unref (printer); gtk_print_backend_set_list_done (GTK_PRINT_BACKEND (backend)); } static GtkPrinterOptionSet * lpr_printer_get_options (GtkPrinter *printer, GtkPrintSettings *settings, GtkPageSetup *page_setup, GtkPrintCapabilities capabilities) { GtkPrinterOptionSet *set; GtkPrinterOption *option; const char *command; char *n_up[] = {"1", "2", "4", "6", "9", "16" }; set = gtk_printer_option_set_new (); 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); option = gtk_printer_option_new ("gtk-main-page-custom-input", _("Command Line"), GTK_PRINTER_OPTION_TYPE_STRING); gtk_printer_option_set_activates_default (option, TRUE); option->group = g_strdup ("GtkPrintDialogExtension"); if (settings != NULL && (command = gtk_print_settings_get (settings, "lpr-commandline"))!= NULL) gtk_printer_option_set (option, command); else gtk_printer_option_set (option, LPR_COMMAND); gtk_printer_option_set_add (set, option); return set; } static void lpr_printer_get_settings_from_options (GtkPrinter *printer, GtkPrinterOptionSet *options, GtkPrintSettings *settings) { GtkPrinterOption *option; option = gtk_printer_option_set_lookup (options, "gtk-main-page-custom-input"); if (option) gtk_print_settings_set (settings, "lpr-commandline", option->value); option = gtk_printer_option_set_lookup (options, "gtk-n-up"); if (option) gtk_print_settings_set (settings, GTK_PRINT_SETTINGS_NUMBER_UP, option->value); option = gtk_printer_option_set_lookup (options, "gtk-n-up-layout"); if (option) gtk_print_settings_set (settings, GTK_PRINT_SETTINGS_NUMBER_UP_LAYOUT, option->value); } static void lpr_printer_prepare_for_print (GtkPrinter *printer, GtkPrintJob *print_job, GtkPrintSettings *settings, GtkPageSetup *page_setup) { double scale; 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); print_job->number_up = gtk_print_settings_get_number_up (settings); print_job->number_up_layout = gtk_print_settings_get_number_up_layout (settings); scale = gtk_print_settings_get_scale (settings); if (scale != 100.0) print_job->scale = scale/100.0; print_job->page_set = gtk_print_settings_get_page_set (settings); print_job->rotate_to_orientation = TRUE; }