gimp/plug-ins/print/print.c

/* GIMP - The GNU Image Manipulation Program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "config.h"

#include <string.h>

#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>

#include "print.h"
#include "print-settings.h"
#include "print-page-layout.h"
#include "print-page-setup.h"
#include "print-draw-page.h"

#include "libgimp/stdplugins-intl.h"


#define PLUG_IN_BINARY        "print"

#define PRINT_PROC_NAME       "file-print-gtk"
#define PAGE_SETUP_PROC_NAME  "file-print-gtk-page-setup"
#define PRINT_TEMP_PROC_NAME  "file-print-gtk-page-setup-notify-temp"


static void        query (void);
static void        run   (const gchar       *name,
                          gint               nparams,
                          const GimpParam   *param,
                          gint              *nreturn_vals,
                          GimpParam        **return_vals);

static GimpPDBStatusType  print_image       (gint32             image_ID,
                                             gboolean           interactive);
static GimpPDBStatusType  page_setup        (gint32             image_ID);

static void        print_show_error         (const gchar       *message,
                                             gboolean           interactive);
static void        print_operation_set_name (GtkPrintOperation *operation,
                                             gint               image_ID);

static void        begin_print              (GtkPrintOperation *operation,
                                             GtkPrintContext   *context,
                                             PrintData         *data);
static void        end_print                (GtkPrintOperation *operation,
                                             GtkPrintContext   *context,
                                             gint32            *image_ID);
static void        draw_page                (GtkPrintOperation *print,
                                             GtkPrintContext   *context,
                                             gint               page_nr,
                                             PrintData         *data);

static GtkWidget * create_custom_widget     (GtkPrintOperation *operation,
                                             PrintData         *data);

static gchar     * print_temp_proc_name     (gint32             image_ID);
static gchar     * print_temp_proc_install  (gint32             image_ID);


/*  Keep a reference to the current GtkPrintOperation
 *  for access by the temporary procedure.
 */
static GtkPrintOperation *print_operation = NULL;


const GimpPlugInInfo PLUG_IN_INFO =
{
  NULL,  /* init_proc  */
  NULL,  /* quit_proc  */
  query, /* query_proc */
  run,   /* run_proc   */
};

MAIN ()

static void
query (void)
{
  static const GimpParamDef print_args[] =
  {
    { GIMP_PDB_INT32,    "run-mode", "Interactive, non-interactive" },
    { GIMP_PDB_IMAGE,    "image",    "Image to print"               }
  };

  gimp_install_procedure (PRINT_PROC_NAME,
                          N_("Print the image"),
                          "Print the image using the GTK+ Print API.",
                          "Bill Skaggs, Sven Neumann, Stefan Röllin",
                          "Bill Skaggs <weskaggs@primate.ucdavis.edu>",
                          "2006, 2007",
                          N_("_Print..."),
                          "*",
                          GIMP_PLUGIN,
                          G_N_ELEMENTS (print_args), 0,
                          print_args, NULL);

  gimp_plugin_menu_register (PRINT_PROC_NAME, "<Image>/File/Send");
  gimp_plugin_icon_register (PRINT_PROC_NAME, GIMP_ICON_TYPE_STOCK_ID,
                             (const guint8 *) GTK_STOCK_PRINT);

  gimp_install_procedure (PAGE_SETUP_PROC_NAME,
                          N_("Adjust page size and orientation for printing"),
                          "Adjust page size and orientation for printing for "
                          "printing the image using the GTK+ Print API.",
                          "Bill Skaggs, Sven Neumann, Stefan Röllin",
                          "Sven Neumann <sven@gimp.org>",
                          "2008",
                          N_("Page Set_up"),
                          "*",
                          GIMP_PLUGIN,
                          G_N_ELEMENTS (print_args), 0,
                          print_args, NULL);

  gimp_plugin_menu_register (PAGE_SETUP_PROC_NAME, "<Image>/File/Send");
}

static void
run (const gchar      *name,
     gint              nparams,
     const GimpParam  *param,
     gint             *nreturn_vals,
     GimpParam       **return_vals)
{
  static GimpParam  values[2];
  GimpRunMode       run_mode;
  GimpPDBStatusType status;
  gint32            image_ID;

  run_mode = param[0].data.d_int32;

  INIT_I18N ();

  *nreturn_vals = 1;
  *return_vals  = values;

  g_thread_init (NULL);

  values[0].type          = GIMP_PDB_STATUS;
  values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;

  image_ID = param[1].data.d_int32;

  if (strcmp (name, PRINT_PROC_NAME) == 0)
    {
      status = print_image (image_ID, run_mode == GIMP_RUN_INTERACTIVE);
    }
  else if (strcmp (name, PAGE_SETUP_PROC_NAME) == 0)
    {
      if (run_mode == GIMP_RUN_INTERACTIVE)
        {
          status = page_setup (image_ID);
        }
      else
        {
          status = GIMP_PDB_CALLING_ERROR;
        }
    }
  else
    {
      status = GIMP_PDB_CALLING_ERROR;
    }

  values[0].data.d_status = status;
}

static GimpPDBStatusType
print_image (gint32    image_ID,
             gboolean  interactive)
{
  GtkPrintOperation *operation;
  GError            *error         = NULL;
  gint32             orig_image_ID = image_ID;
  gint32             drawable_ID   = gimp_image_get_active_drawable (image_ID);
  gchar             *temp_proc;
  PrintData          data;
  GimpExportReturn   export;

  /* export the image */
  export = gimp_export_image (&image_ID, &drawable_ID, NULL,
                              GIMP_EXPORT_CAN_HANDLE_RGB   |
                              GIMP_EXPORT_CAN_HANDLE_GRAY  |
                              GIMP_EXPORT_CAN_HANDLE_ALPHA);

  if (export == GIMP_EXPORT_CANCEL)
    return GIMP_PDB_EXECUTION_ERROR;

  operation = gtk_print_operation_new ();

  print_operation_set_name (operation, orig_image_ID);

  print_page_setup_load (operation, orig_image_ID);

  /* fill in the PrintData struct */
  data.num_pages     = 1;
  data.image_id      = orig_image_ID;
  data.drawable_id   = drawable_ID;
  data.unit          = gimp_get_default_unit ();
  data.image_unit    = gimp_image_get_unit (image_ID);
  data.offset_x      = 0;
  data.offset_y      = 0;
  data.center        = CENTER_BOTH;
  data.use_full_page = FALSE;
  data.operation     = operation;

  gimp_image_get_resolution (image_ID, &data.xres, &data.yres);

  load_print_settings (&data);

  if (export != GIMP_EXPORT_EXPORT)
    image_ID = -1;

  g_signal_connect (operation, "begin-print",
                    G_CALLBACK (begin_print),
                    &data);
  g_signal_connect (operation, "draw-page",
                    G_CALLBACK (draw_page),
                    &data);
  g_signal_connect (operation, "end-print",
                    G_CALLBACK (end_print),
                    &image_ID);

  print_operation = operation;
  temp_proc = print_temp_proc_install (orig_image_ID);
  gimp_extension_enable ();

  if (interactive)
    {
      gimp_ui_init (PLUG_IN_BINARY, FALSE);

      g_signal_connect_swapped (operation, "end-print",
                                G_CALLBACK (save_print_settings),
                                &data);

      g_signal_connect (operation, "create-custom-widget",
                        G_CALLBACK (create_custom_widget),
                        &data);

      gtk_print_operation_set_custom_tab_label (operation, _("Image Settings"));

      gtk_print_operation_run (operation,
                               GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
                               NULL, &error);
    }
  else
    {
      gtk_print_operation_run (operation,
                               GTK_PRINT_OPERATION_ACTION_PRINT,
                               NULL, &error);
    }

  gimp_uninstall_temp_proc (temp_proc);
  g_free (temp_proc);
  print_operation = NULL;

  g_object_unref (operation);

  if (gimp_image_is_valid (image_ID))
    gimp_image_delete (image_ID);

  if (error)
    {
      print_show_error (error->message, interactive);
      g_error_free (error);
    }

  return GIMP_PDB_SUCCESS;
}

static GimpPDBStatusType
page_setup (gint32 image_ID)
{
  GtkPrintOperation *operation;
  gchar             *name;

  gimp_ui_init (PLUG_IN_BINARY, FALSE);

  operation = gtk_print_operation_new ();

  print_page_setup_load (operation, image_ID);
  print_page_setup_dialog (operation);
  print_page_setup_save (operation);

  g_object_unref (operation);

  /* now notify a running print procedure about this change */
  name = print_temp_proc_name (image_ID);

  if (name)
    {
      GimpParam *return_vals;
      gint       n_return_vals;

      return_vals = gimp_run_procedure (name,
                                        &n_return_vals,
                                        GIMP_PDB_IMAGE, image_ID,
                                        GIMP_PDB_END);
      gimp_destroy_params (return_vals, n_return_vals);

      g_free (name);
    }

  return GIMP_PDB_SUCCESS;
}

static void
print_show_error (const gchar *message,
                  gboolean     interactive)
{
  g_printerr ("Print: %s\n", message);

  if (interactive)
    {
      GtkWidget *dialog;

      dialog = gtk_message_dialog_new (NULL, 0,
                                       GTK_MESSAGE_ERROR,
                                       GTK_BUTTONS_OK,
                                       _("An error occurred "
                                         "while trying to print:"));

      gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
                                                message);

      gtk_dialog_run (GTK_DIALOG (dialog));
      gtk_widget_destroy (dialog);
    }
}

static void
print_operation_set_name (GtkPrintOperation *operation,
                          gint               image_ID)
{
  gchar *name = gimp_image_get_name (image_ID);

  gtk_print_operation_set_job_name (operation, name);

  g_free (name);
}

static void
begin_print (GtkPrintOperation *operation,
             GtkPrintContext   *context,
             PrintData         *data)
{
  gtk_print_operation_set_n_pages (operation, data->num_pages);
  gtk_print_operation_set_use_full_page (operation, data->use_full_page);

  gimp_progress_init (_("Printing"));
}

static void
end_print (GtkPrintOperation *operation,
           GtkPrintContext   *context,
           gint32            *image_ID)
{
  /* we don't need the export image any longer, delete it */
  if (gimp_image_is_valid (*image_ID))
    {
      gimp_image_delete (*image_ID);
      *image_ID = -1;
    }

  gimp_progress_end ();

  /* generate events to solve the problems described in bug #466928 */
  g_timeout_add (1000, (GSourceFunc) gtk_true, NULL);
}

static void
draw_page (GtkPrintOperation *operation,
           GtkPrintContext   *context,
           gint               page_nr,
           PrintData         *data)
{
  print_draw_page (context, data);

  gimp_progress_update (1.0);
}

/*
 * This callback creates a "custom" widget that gets inserted into the
 * print operation dialog.
 */
static GtkWidget *
create_custom_widget (GtkPrintOperation *operation,
                      PrintData         *data)
{
  return print_page_layout_gui (data);
}

static void
print_temp_proc_run (const gchar      *name,
                     gint              nparams,
                     const GimpParam  *param,
                     gint             *nreturn_vals,
                     GimpParam       **return_vals)
{
  static GimpParam  values[1];

  values[0].type          = GIMP_PDB_STATUS;
  values[0].data.d_status = GIMP_PDB_SUCCESS;

  *nreturn_vals = 1;
  *return_vals  = values;

  if (print_operation && nparams == 1)
    print_page_setup_load (print_operation, param[0].data.d_int32);
}

static gchar *
print_temp_proc_name (gint32 image_ID)
{
  return g_strdup_printf (PRINT_TEMP_PROC_NAME "-%d", image_ID);
}

static gchar *
print_temp_proc_install (gint32  image_ID)
{
  static const GimpParamDef args[] =
  {
    { GIMP_PDB_IMAGE, "image", "Image to print" }
  };

  gchar *name = print_temp_proc_name (image_ID);

  gimp_install_temp_proc (name,
                          "DON'T USE THIS ONE",
                          "Temporary procedure to notify the Print plug-in "
                          "about changes to the Page Setup.",
			  "Sven Neumann",
			  "Sven Neumann",
			  "2008",
                          NULL,
                          "",
                          GIMP_TEMPORARY,
                          G_N_ELEMENTS (args), 0, args, NULL,
                          print_temp_proc_run);

  return name;
}