gtkprintbackendtest.c

This GTK+ version 2.12.3. GTK+ is a multi-platform toolkit for creating graphical user interfaces.

/* GTK - The GIMP Toolkit
 * gtkprintbackendpdf.c: Test implementation of GtkPrintBackend 
 * for printing to a test
 * Copyright (C) 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 <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>

#include <errno.h>
#include <cairo.h>
#include <cairo-pdf.h>
#include <cairo-ps.h>

#include <glib/gi18n-lib.h>

#include "gtkprintoperation.h"

#include "gtkprintbackend.h"
#include "gtkprintbackendtest.h"

#include "gtkprinter.h"
#include "gtkprinter-private.h"

typedef struct _GtkPrintBackendTestClass GtkPrintBackendTestClass;

#define GTK_PRINT_BACKEND_TEST_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_PRINT_BACKEND_TEST, GtkPrintBackendTestClass))
#define GTK_IS_PRINT_BACKEND_TEST_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_PRINT_BACKEND_TEST))
#define GTK_PRINT_BACKENDTEST_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_PRINT_BACKEND_TEST, GtkPrintBackendTestClass))

#define _STREAM_MAX_CHUNK_SIZE 8192

static GType print_backend_test_type = 0;

struct _GtkPrintBackendTestClass
{
  GtkPrintBackendClass parent_class;
};

struct _GtkPrintBackendTest
{
  GtkPrintBackend parent_instance;
};

typedef enum
{
  FORMAT_PDF,
  FORMAT_PS,
  N_FORMATS
} OutputFormat;

static const gchar* formats[N_FORMATS] =
{
  "pdf",
  "ps"
};

static GObjectClass *backend_parent_class;

static void                 gtk_print_backend_test_class_init      (GtkPrintBackendTestClass *class);
static void                 gtk_print_backend_test_init            (GtkPrintBackendTest      *impl);
static void                 test_printer_get_settings_from_options (GtkPrinter              *printer,
								    GtkPrinterOptionSet     *options,
								    GtkPrintSettings        *settings);
static GtkPrinterOptionSet *test_printer_get_options               (GtkPrinter              *printer,
								    GtkPrintSettings        *settings,
								    GtkPageSetup            *page_setup,
								    GtkPrintCapabilities     capabilities);
static void                 test_printer_prepare_for_print         (GtkPrinter              *printer,
								    GtkPrintJob             *print_job,
								    GtkPrintSettings        *settings,
								    GtkPageSetup            *page_setup);
static void                 gtk_print_backend_test_print_stream    (GtkPrintBackend         *print_backend,
								    GtkPrintJob             *job,
								    GIOChannel              *data_io,
								    GtkPrintJobCompleteFunc  callback,
								    gpointer                 user_data,
								    GDestroyNotify           dnotify);
static cairo_surface_t *    test_printer_create_cairo_surface      (GtkPrinter              *printer,
								    GtkPrintSettings        *settings,
								    gdouble                  width,
								    gdouble                  height,
								    GIOChannel              *cache_io);

static void                 test_printer_request_details           (GtkPrinter              *printer);

static void
gtk_print_backend_test_register_type (GTypeModule *module)
{
  static const GTypeInfo print_backend_test_info =
  {
    sizeof (GtkPrintBackendTestClass),
    NULL,		/* base_init */
    NULL,		/* base_finalize */
    (GClassInitFunc) gtk_print_backend_test_class_init,
    NULL,		/* class_finalize */
    NULL,		/* class_data */
    sizeof (GtkPrintBackendTest),
    0,		/* n_preallocs */
    (GInstanceInitFunc) gtk_print_backend_test_init,
  };

  print_backend_test_type = g_type_module_register_type (module,
                                                         GTK_TYPE_PRINT_BACKEND,
                                                         "GtkPrintBackendTest",
                                                         &print_backend_test_info, 0);
}

G_MODULE_EXPORT void 
pb_module_init (GTypeModule *module)
{
  gtk_print_backend_test_register_type (module);
}

G_MODULE_EXPORT void 
pb_module_exit (void)
{

}
  
G_MODULE_EXPORT GtkPrintBackend * 
pb_module_create (void)
{
  return gtk_print_backend_test_new ();
}

/*
 * GtkPrintBackendTest
 */
GType
gtk_print_backend_test_get_type (void)
{
  return print_backend_test_type;
}

/**
 * gtk_print_backend_test_new:
 *
 * Creates a new #GtkPrintBackendTest object. #GtkPrintBackendTest
 * implements the #GtkPrintBackend interface with direct access to
 * the testsystem using Unix/Linux API calls
 *
 * Return value: the new #GtkPrintBackendTest object
 **/
GtkPrintBackend *
gtk_print_backend_test_new (void)
{
  return g_object_new (GTK_TYPE_PRINT_BACKEND_TEST, NULL);
}

static void
gtk_print_backend_test_class_init (GtkPrintBackendTestClass *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_test_print_stream;
  backend_class->printer_create_cairo_surface = test_printer_create_cairo_surface;
  backend_class->printer_get_options = test_printer_get_options;
  backend_class->printer_get_settings_from_options = test_printer_get_settings_from_options;
  backend_class->printer_prepare_for_print = test_printer_prepare_for_print;
  backend_class->printer_request_details = test_printer_request_details;
}

/* return N_FORMATS if no explicit format in the settings */
static OutputFormat
format_from_settings (GtkPrintSettings *settings)
{
  const gchar *value;
  gint i;

  if (settings == NULL)
    return N_FORMATS;

  value = gtk_print_settings_get (settings, GTK_PRINT_SETTINGS_OUTPUT_FILE_FORMAT);
  if (value == NULL)
    return N_FORMATS;

  for (i = 0; i < N_FORMATS; ++i)
    if (strcmp (value, formats[i]) == 0)
      break;

  g_assert (i < N_FORMATS);

  return (OutputFormat) i;
}

static gchar *
output_test_from_settings (GtkPrintSettings *settings,
			   const gchar      *default_format)
{
  gchar *uri = NULL;
  
  if (settings)
    uri = g_strdup (gtk_print_settings_get (settings, GTK_PRINT_SETTINGS_OUTPUT_URI));

  if (uri == NULL)
    { 
      const gchar *extension;
      gchar *name, *locale_name, *path;

      if (default_format)
        extension = default_format;
      else
        {
          OutputFormat format;

          format = format_from_settings (settings);
          extension = format == FORMAT_PS ? "ps" : "pdf";
        }
 
      /* default filename used for print-to-test */ 
      name = g_strdup_printf (_("test-output.%s"), extension);
      locale_name = g_filename_from_utf8 (name, -1, NULL, NULL, NULL);
      g_free (name);

      if (locale_name != NULL)
        {
          path = g_build_filename (g_get_current_dir (), locale_name, NULL);
          g_free (locale_name);

          uri = g_filename_to_uri (path, NULL, NULL);
          g_free (path);
	}
    }

  return uri;
}

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 ("TEST Backend: Writing %i byte chunk to temp test\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 ("TEST Backend: Error writing to temp test, %s\n", error->message));

          g_error_free (error);
	  return CAIRO_STATUS_WRITE_ERROR;
	}    

      GTK_NOTE (PRINTING,
                g_print ("TEST Backend: Wrote %i bytes to temp test\n", (int)written));
      
      data += written;
      length -= written;
    }

  return CAIRO_STATUS_SUCCESS;
}


static cairo_surface_t *
test_printer_create_cairo_surface (GtkPrinter       *printer,
				   GtkPrintSettings *settings,
				   gdouble           width, 
				   gdouble           height,
				   GIOChannel       *cache_io)
{
  cairo_surface_t *surface;