forked from AuroraMiddleware/gtk
497 lines
14 KiB
C
497 lines
14 KiB
C
/* GTK - The GIMP Toolkit
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* gtkprintbackendlpr.c: LPR implementation of GtkPrintBackend
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* for printing to lpr
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* Copyright (C) 2006, 2007 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <cairo.h>
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#include <cairo-ps.h>
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#include <glib/gi18n-lib.h>
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#include <gtk/gtk.h>
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#include "gtkprinter-private.h"
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#include "gtkprintbackendlpr.h"
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typedef struct _GtkPrintBackendLprClass GtkPrintBackendLprClass;
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#define GTK_PRINT_BACKEND_LPR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_PRINT_BACKEND_LPR, GtkPrintBackendLprClass))
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#define GTK_IS_PRINT_BACKEND_LPR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_PRINT_BACKEND_LPR))
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#define GTK_PRINT_BACKEND_LPR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_PRINT_BACKEND_LPR, GtkPrintBackendLprClass))
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#define _LPR_MAX_CHUNK_SIZE 8192
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static GType print_backend_lpr_type = 0;
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struct _GtkPrintBackendLprClass
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{
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GtkPrintBackendClass parent_class;
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};
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struct _GtkPrintBackendLpr
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{
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GtkPrintBackend parent_instance;
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};
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static GObjectClass *backend_parent_class;
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static void gtk_print_backend_lpr_class_init (GtkPrintBackendLprClass *class);
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static void gtk_print_backend_lpr_init (GtkPrintBackendLpr *impl);
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static void lpr_printer_get_settings_from_options (GtkPrinter *printer,
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GtkPrinterOptionSet *options,
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GtkPrintSettings *settings);
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static GtkPrinterOptionSet *lpr_printer_get_options (GtkPrinter *printer,
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GtkPrintSettings *settings,
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GtkPageSetup *page_setup,
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GtkPrintCapabilities capabilities);
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static void lpr_printer_prepare_for_print (GtkPrinter *printer,
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GtkPrintJob *print_job,
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GtkPrintSettings *settings,
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GtkPageSetup *page_setup);
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static cairo_surface_t * lpr_printer_create_cairo_surface (GtkPrinter *printer,
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GtkPrintSettings *settings,
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gdouble width,
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gdouble height,
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GIOChannel *cache_io);
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static void gtk_print_backend_lpr_print_stream (GtkPrintBackend *print_backend,
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GtkPrintJob *job,
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GIOChannel *data_io,
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GtkPrintJobCompleteFunc callback,
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gpointer user_data,
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GDestroyNotify dnotify);
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static void
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gtk_print_backend_lpr_register_type (GTypeModule *module)
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{
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const GTypeInfo print_backend_lpr_info =
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{
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sizeof (GtkPrintBackendLprClass),
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NULL, /* base_init */
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NULL, /* base_finalize */
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(GClassInitFunc) gtk_print_backend_lpr_class_init,
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NULL, /* class_finalize */
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NULL, /* class_data */
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sizeof (GtkPrintBackendLpr),
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0, /* n_preallocs */
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(GInstanceInitFunc) gtk_print_backend_lpr_init,
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};
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print_backend_lpr_type = g_type_module_register_type (module,
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GTK_TYPE_PRINT_BACKEND,
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"GtkPrintBackendLpr",
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&print_backend_lpr_info, 0);
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}
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G_MODULE_EXPORT void
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pb_module_init (GTypeModule *module)
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{
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gtk_print_backend_lpr_register_type (module);
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}
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G_MODULE_EXPORT void
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pb_module_exit (void)
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{
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}
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G_MODULE_EXPORT GtkPrintBackend *
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pb_module_create (void)
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{
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return gtk_print_backend_lpr_new ();
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}
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/*
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* GtkPrintBackendLpr
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*/
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GType
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gtk_print_backend_lpr_get_type (void)
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{
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return print_backend_lpr_type;
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}
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/**
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* gtk_print_backend_lpr_new:
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*
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* Creates a new #GtkPrintBackendLpr object. #GtkPrintBackendLpr
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* implements the #GtkPrintBackend interface with direct access to
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* the filesystem using Unix/Linux API calls
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*
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* Return value: the new #GtkPrintBackendLpr object
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**/
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GtkPrintBackend *
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gtk_print_backend_lpr_new (void)
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{
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return g_object_new (GTK_TYPE_PRINT_BACKEND_LPR, NULL);
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}
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static void
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gtk_print_backend_lpr_class_init (GtkPrintBackendLprClass *class)
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{
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GtkPrintBackendClass *backend_class = GTK_PRINT_BACKEND_CLASS (class);
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backend_parent_class = g_type_class_peek_parent (class);
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backend_class->print_stream = gtk_print_backend_lpr_print_stream;
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backend_class->printer_create_cairo_surface = lpr_printer_create_cairo_surface;
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backend_class->printer_get_options = lpr_printer_get_options;
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backend_class->printer_get_settings_from_options = lpr_printer_get_settings_from_options;
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backend_class->printer_prepare_for_print = lpr_printer_prepare_for_print;
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}
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static cairo_status_t
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_cairo_write (void *closure,
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const unsigned char *data,
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unsigned int length)
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{
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GIOChannel *io = (GIOChannel *)closure;
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gsize written;
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GError *error;
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error = NULL;
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GTK_NOTE (PRINTING,
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g_print ("LPR Backend: Writting %i byte chunk to temp file\n", length));
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while (length > 0)
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{
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g_io_channel_write_chars (io, (const gchar*)data, length, &written, &error);
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if (error != NULL)
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{
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GTK_NOTE (PRINTING,
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g_print ("LPR Backend: Error writting to temp file, %s\n", error->message));
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g_error_free (error);
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return CAIRO_STATUS_WRITE_ERROR;
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}
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GTK_NOTE (PRINTING,
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g_print ("LPR Backend: Wrote %" G_GSIZE_FORMAT " bytes to temp file\n", written));
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data += written;
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length -= written;
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}
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return CAIRO_STATUS_SUCCESS;
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}
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static cairo_surface_t *
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lpr_printer_create_cairo_surface (GtkPrinter *printer,
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GtkPrintSettings *settings,
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gdouble width,
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gdouble height,
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GIOChannel *cache_io)
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{
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cairo_surface_t *surface;
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surface = cairo_ps_surface_create_for_stream (_cairo_write, cache_io, width, height);
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cairo_surface_set_fallback_resolution (surface,
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2.0 * gtk_print_settings_get_printer_lpi (settings),
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2.0 * gtk_print_settings_get_printer_lpi (settings));
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return surface;
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}
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typedef struct {
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GtkPrintBackend *backend;
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GtkPrintJobCompleteFunc callback;
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GtkPrintJob *job;
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gpointer user_data;
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GDestroyNotify dnotify;
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GIOChannel *in;
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} _PrintStreamData;
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static void
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lpr_print_cb (GtkPrintBackendLpr *print_backend,
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GError *error,
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gpointer user_data)
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{
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_PrintStreamData *ps = (_PrintStreamData *) user_data;
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if (ps->in != NULL)
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g_io_channel_unref (ps->in);
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if (ps->callback)
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ps->callback (ps->job, ps->user_data, error);
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if (ps->dnotify)
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ps->dnotify (ps->user_data);
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gtk_print_job_set_status (ps->job,
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error ? GTK_PRINT_STATUS_FINISHED_ABORTED
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: GTK_PRINT_STATUS_FINISHED);
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if (ps->job)
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g_object_unref (ps->job);
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g_free (ps);
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}
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static gboolean
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lpr_write (GIOChannel *source,
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GIOCondition con,
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gpointer user_data)
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{
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gchar buf[_LPR_MAX_CHUNK_SIZE];
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gsize bytes_read;
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GError *error;
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GIOStatus status;
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_PrintStreamData *ps = (_PrintStreamData *) user_data;
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error = NULL;
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status =
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g_io_channel_read_chars (source,
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buf,
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_LPR_MAX_CHUNK_SIZE,
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&bytes_read,
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&error);
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if (status != G_IO_STATUS_ERROR)
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{
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gsize bytes_written;
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g_io_channel_write_chars (ps->in,
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buf,
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bytes_read,
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&bytes_written,
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&error);
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}
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if (error != NULL || status == G_IO_STATUS_EOF)
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{
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lpr_print_cb (GTK_PRINT_BACKEND_LPR (ps->backend),
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error, user_data);
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if (error != NULL)
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{
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GTK_NOTE (PRINTING,
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g_print ("LPR Backend: %s\n", error->message));
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g_error_free (error);
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}
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return FALSE;
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}
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GTK_NOTE (PRINTING,
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g_print ("LPR Backend: Writting %" G_GSIZE_FORMAT " byte chunk to lpr pipe\n", bytes_read));
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return TRUE;
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}
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#define LPR_COMMAND "lpr"
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static void
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gtk_print_backend_lpr_print_stream (GtkPrintBackend *print_backend,
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GtkPrintJob *job,
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GIOChannel *data_io,
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GtkPrintJobCompleteFunc callback,
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gpointer user_data,
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GDestroyNotify dnotify)
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{
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GError *print_error = NULL;
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_PrintStreamData *ps;
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GtkPrintSettings *settings;
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gint argc;
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gint in_fd;
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gchar **argv = NULL;
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const char *cmd_line;
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settings = gtk_print_job_get_settings (job);
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cmd_line = gtk_print_settings_get (settings, "lpr-commandline");
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if (cmd_line == NULL)
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cmd_line = LPR_COMMAND;
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ps = g_new0 (_PrintStreamData, 1);
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ps->callback = callback;
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ps->user_data = user_data;
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ps->dnotify = dnotify;
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ps->job = g_object_ref (job);
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ps->in = NULL;
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/* spawn lpr with pipes and pipe ps file to lpr */
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if (!g_shell_parse_argv (cmd_line, &argc, &argv, &print_error))
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goto out;
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if (!g_spawn_async_with_pipes (NULL,
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argv,
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NULL,
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G_SPAWN_SEARCH_PATH,
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NULL,
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NULL,
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NULL,
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&in_fd,
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NULL,
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NULL,
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&print_error))
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goto out;
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ps->in = g_io_channel_unix_new (in_fd);
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g_io_channel_set_encoding (ps->in, NULL, &print_error);
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if (print_error != NULL)
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{
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if (ps->in != NULL)
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g_io_channel_unref (ps->in);
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goto out;
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}
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g_io_channel_set_close_on_unref (ps->in, TRUE);
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g_io_add_watch (data_io,
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G_IO_IN | G_IO_PRI | G_IO_ERR | G_IO_HUP,
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(GIOFunc) lpr_write,
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ps);
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out:
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if (argv != NULL)
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g_strfreev (argv);
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if (print_error != NULL)
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{
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lpr_print_cb (GTK_PRINT_BACKEND_LPR (print_backend),
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print_error, ps);
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g_error_free (print_error);
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}
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}
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static void
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gtk_print_backend_lpr_init (GtkPrintBackendLpr *backend)
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{
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GtkPrinter *printer;
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printer = gtk_printer_new (_("Print to LPR"),
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GTK_PRINT_BACKEND (backend),
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TRUE);
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gtk_printer_set_has_details (printer, TRUE);
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gtk_printer_set_icon_name (printer, "printer");
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gtk_printer_set_is_active (printer, TRUE);
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gtk_printer_set_is_default (printer, TRUE);
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gtk_print_backend_add_printer (GTK_PRINT_BACKEND (backend), printer);
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g_object_unref (printer);
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gtk_print_backend_set_list_done (GTK_PRINT_BACKEND (backend));
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}
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static GtkPrinterOptionSet *
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lpr_printer_get_options (GtkPrinter *printer,
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GtkPrintSettings *settings,
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GtkPageSetup *page_setup,
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GtkPrintCapabilities capabilities)
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{
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GtkPrinterOptionSet *set;
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GtkPrinterOption *option;
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const char *command;
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char *n_up[] = {"1", "2", "4", "6", "9", "16" };
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set = gtk_printer_option_set_new ();
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option = gtk_printer_option_new ("gtk-n-up", _("Pages Per Sheet"), GTK_PRINTER_OPTION_TYPE_PICKONE);
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gtk_printer_option_choices_from_array (option, G_N_ELEMENTS (n_up),
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n_up, n_up);
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gtk_printer_option_set (option, "1");
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gtk_printer_option_set_add (set, option);
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g_object_unref (option);
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option = gtk_printer_option_new ("gtk-main-page-custom-input", _("Command Line"), GTK_PRINTER_OPTION_TYPE_STRING);
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gtk_printer_option_set_activates_default (option, TRUE);
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option->group = g_strdup ("GtkPrintDialogExtension");
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if (settings != NULL &&
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(command = gtk_print_settings_get (settings, "lpr-commandline"))!= NULL)
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gtk_printer_option_set (option, command);
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else
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gtk_printer_option_set (option, LPR_COMMAND);
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gtk_printer_option_set_add (set, option);
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return set;
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}
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static void
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lpr_printer_get_settings_from_options (GtkPrinter *printer,
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GtkPrinterOptionSet *options,
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GtkPrintSettings *settings)
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{
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GtkPrinterOption *option;
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option = gtk_printer_option_set_lookup (options, "gtk-main-page-custom-input");
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if (option)
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gtk_print_settings_set (settings, "lpr-commandline", option->value);
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option = gtk_printer_option_set_lookup (options, "gtk-n-up");
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if (option)
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gtk_print_settings_set (settings, GTK_PRINT_SETTINGS_NUMBER_UP, option->value);
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option = gtk_printer_option_set_lookup (options, "gtk-n-up-layout");
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if (option)
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gtk_print_settings_set (settings, GTK_PRINT_SETTINGS_NUMBER_UP_LAYOUT, option->value);
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}
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static void
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lpr_printer_prepare_for_print (GtkPrinter *printer,
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GtkPrintJob *print_job,
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GtkPrintSettings *settings,
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GtkPageSetup *page_setup)
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{
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double scale;
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GtkPrintPages pages;
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GtkPageRange *ranges;
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gint n_ranges;
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pages = gtk_print_settings_get_print_pages (settings);
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gtk_print_job_set_pages (print_job, pages);
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if (pages == GTK_PRINT_PAGES_RANGES)
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ranges = gtk_print_settings_get_page_ranges (settings, &n_ranges);
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else
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{
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ranges = NULL;
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n_ranges = 0;
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}
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gtk_print_job_set_page_ranges (print_job, ranges, n_ranges);
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gtk_print_job_set_collate (print_job, gtk_print_settings_get_collate (settings));
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gtk_print_job_set_reverse (print_job, gtk_print_settings_get_reverse (settings));
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gtk_print_job_set_num_copies (print_job, gtk_print_settings_get_n_copies (settings));
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gtk_print_job_set_n_up (print_job, gtk_print_settings_get_number_up (settings));
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gtk_print_job_set_n_up_layout (print_job, gtk_print_settings_get_number_up_layout (settings));
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scale = gtk_print_settings_get_scale (settings);
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if (scale != 100.0)
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gtk_print_job_set_scale (print_job, scale / 100.0);
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gtk_print_job_set_page_set (print_job, gtk_print_settings_get_page_set (settings));
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gtk_print_job_set_rotate (print_job, TRUE);
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}
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