/* GTK - The GIMP Toolkit
 * gtkprintoperation-unix.c: Print Operation Details for Unix and Unix like platforms
 * Copyright (C) 2006, 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"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>

#include "gtkprintoperation-private.h"
#include "gtkmarshal.h"
#include "gtkmessagedialog.h"

#include <cairo-pdf.h>
#include <cairo-ps.h>
#include "gtkprintunixdialog.h"
#include "gtkpagesetupunixdialog.h"
#include "gtkprintbackend.h"
#include "gtkprinter.h"
#include "gtkprintjob.h"
#include "gtklabel.h"
#include "gtkalias.h"
#include "gtkintl.h"


typedef struct {
  GtkPrintJob *job;         /* the job we are sending to the printer */
  gulong job_status_changed_tag;
  GtkWindow *parent;        /* just in case we need to throw error dialogs */
  GMainLoop *loop;
  gboolean data_sent;
} GtkPrintOperationUnix;

typedef struct _PrinterFinder PrinterFinder;

static void printer_finder_free (PrinterFinder *finder);
static void find_printer        (const char    *printer,
				 GFunc          func,
				 gpointer       data);

static void
unix_start_page (GtkPrintOperation *op,
		 GtkPrintContext   *print_context,
		 GtkPageSetup      *page_setup)
{
  GtkPaperSize *paper_size;
  cairo_surface_type_t type;
  double w, h;

  paper_size = gtk_page_setup_get_paper_size (page_setup);

  w = gtk_paper_size_get_width (paper_size, GTK_UNIT_POINTS);
  h = gtk_paper_size_get_height (paper_size, GTK_UNIT_POINTS);
  
  type = cairo_surface_get_type (op->priv->surface);

  if (type == CAIRO_SURFACE_TYPE_PS)
    cairo_ps_surface_set_size (op->priv->surface, w, h);
  else if (type == CAIRO_SURFACE_TYPE_PDF)
    cairo_pdf_surface_set_size (op->priv->surface, w, h);
}

static void
unix_end_page (GtkPrintOperation *op,
	       GtkPrintContext   *print_context)
{
  cairo_t *cr;

  cr = gtk_print_context_get_cairo (print_context);
  cairo_show_page (cr);
}

static void
op_unix_free (GtkPrintOperationUnix *op_unix)
{
  if (op_unix->job)
    {
      g_signal_handler_disconnect (op_unix->job,
				   op_unix->job_status_changed_tag);
      g_object_unref (op_unix->job);
    }

  g_free (op_unix);
}

static void
unix_finish_send  (GtkPrintJob *job,
                   void        *user_data, 
                   GError      *error)
{
  GtkPrintOperationUnix *op_unix;

  op_unix = (GtkPrintOperationUnix *) user_data;

  if (error != NULL)
    {
      GtkWidget *edialog;
      edialog = gtk_message_dialog_new (op_unix->parent, 
                                        GTK_DIALOG_DESTROY_WITH_PARENT,
                                        GTK_MESSAGE_ERROR,
                                        GTK_BUTTONS_CLOSE,
                                        _("Error printing") /* FIXME better text */);
      gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (edialog),
                                                "%s", error->message);
      gtk_window_set_modal (GTK_WINDOW (edialog), TRUE);
      g_signal_connect (edialog, "response",
                        G_CALLBACK (gtk_widget_destroy), NULL);

      gtk_window_present (GTK_WINDOW (edialog));
    }

  op_unix->data_sent = TRUE;
  if (op_unix->loop)
    g_main_loop_quit (op_unix->loop);
}

static void
unix_end_run (GtkPrintOperation *op,
	      gboolean wait)
{
  GtkPrintOperationUnix *op_unix = op->priv->platform_data;

  if (wait)
    op_unix->loop = g_main_loop_new (NULL, FALSE);
  
  /* TODO: Check for error */
  gtk_print_job_send (op_unix->job,
                      unix_finish_send, 
                      op_unix, NULL,
		      NULL);

  if (wait)
    {
      if (!op_unix->data_sent)
	{
	  GDK_THREADS_LEAVE ();  
	  g_main_loop_run (op_unix->loop);
	  GDK_THREADS_ENTER ();  
	}
      g_main_loop_unref (op_unix->loop);
    }
}

static void
job_status_changed_cb (GtkPrintJob       *job, 
		       GtkPrintOperation *op)
{
  _gtk_print_operation_set_status (op, gtk_print_job_get_status (job), NULL);
}


static GtkWidget *
get_print_dialog (GtkPrintOperation *op,
                  GtkWindow         *parent)
{
  GtkPrintOperationPrivate *priv = op->priv;
  GtkWidget *pd, *label;
  GtkPageSetup *page_setup;
  const char *app_name;

  pd = gtk_print_unix_dialog_new (NULL, parent);

  if (priv->print_settings)
    gtk_print_unix_dialog_set_settings (GTK_PRINT_UNIX_DIALOG (pd),
					priv->print_settings);
  if (priv->default_page_setup)
    page_setup = gtk_page_setup_copy (priv->default_page_setup);
  else
    page_setup = gtk_page_setup_new ();

  gtk_print_unix_dialog_set_page_setup (GTK_PRINT_UNIX_DIALOG (pd), 
                                        page_setup);
  g_object_unref (page_setup);

  g_signal_emit_by_name (op, "create-custom-widget",
			 &op->priv->custom_widget);

  if (op->priv->custom_widget) {
    app_name = g_get_application_name ();
    if (app_name == NULL)
      app_name = _("Application");
    
    label = gtk_label_new (app_name);
    
    gtk_print_unix_dialog_add_custom_tab (GTK_PRINT_UNIX_DIALOG (pd),
					  op->priv->custom_widget, label);
  }
  
  return pd;
}
  
typedef struct {
  GtkPrintOperation           *op;
  gboolean                     do_print;
  GError                     **error;
  GtkPrintOperationResult      result;
  GtkPrintOperationPrintFunc   print_cb;
  GDestroyNotify               destroy;
  GtkWindow                   *parent;
  GMainLoop                   *loop;
} PrintResponseData;

static void
print_response_data_free (gpointer data)
{
  PrintResponseData *rdata = data;

  g_object_unref (rdata->op);
  g_free (rdata);
}

static void
finish_print (PrintResponseData *rdata,
	      GtkPrinter *printer,
	      GtkPageSetup *page_setup,
	      GtkPrintSettings *settings)
{
  GtkPrintOperation *op = rdata->op;
  GtkPrintOperationPrivate *priv = op->priv;

  priv->start_page = unix_start_page;
  priv->end_page = unix_end_page;
  priv->end_run = unix_end_run;
  
  if (rdata->do_print)
    {
      GtkPrintOperationUnix *op_unix;

      gtk_print_operation_set_print_settings (op, settings);
      
      op_unix = g_new0 (GtkPrintOperationUnix, 1);
      op_unix->job = gtk_print_job_new (priv->job_name,
					printer,
					settings,
					page_setup);

      gtk_print_job_set_track_print_status (op_unix->job, priv->track_print_status);
      
      rdata->op->priv->surface = gtk_print_job_get_surface (op_unix->job, rdata->error);
      if (op->priv->surface == NULL)
        {
	  rdata->do_print = FALSE;
	  op_unix_free (op_unix);
	  rdata->result = GTK_PRINT_OPERATION_RESULT_ERROR;
	  goto out;
	}

      _gtk_print_operation_set_status (op, gtk_print_job_get_status (op_unix->job), NULL);
      op_unix->job_status_changed_tag =
	g_signal_connect (op_unix->job, "status_changed",
			  G_CALLBACK (job_status_changed_cb), op);
      
      op_unix->parent = rdata->parent;

      priv->dpi_x = 72;
      priv->dpi_y = 72;
 
      priv->platform_data = op_unix;
      priv->free_platform_data = (GDestroyNotify) op_unix_free;

      priv->print_pages = op_unix->job->print_pages;
      priv->page_ranges = op_unix->job->page_ranges;
      priv->num_page_ranges = op_unix->job->num_page_ranges;
  
      priv->manual_num_copies = op_unix->job->num_copies;
      priv->manual_collation = op_unix->job->collate;
      priv->manual_reverse = op_unix->job->reverse;
      priv->manual_page_set = op_unix->job->page_set;
      priv->manual_scale = op_unix->job->scale;
      priv->manual_orientation = op_unix->job->rotate_to_orientation;
    } 

 out:  
  if (rdata->print_cb)
    {
      if (rdata->do_print)
        rdata->print_cb (op, FALSE); 
      else
       _gtk_print_operation_set_status (op, GTK_PRINT_STATUS_FINISHED_ABORTED, NULL); 
    }

  if (rdata->destroy)
    rdata->destroy (rdata);
}

static void
handle_print_response (GtkWidget *dialog,
		       gint       response,
		       gpointer   data)
{
  GtkPrintUnixDialog *pd = GTK_PRINT_UNIX_DIALOG (dialog);
  PrintResponseData *rdata = data;
  GtkPrintSettings *settings = NULL;
  GtkPageSetup *page_setup = NULL;
  GtkPrinter *printer = NULL;

  if (response == GTK_RESPONSE_OK)
    {
      rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;

      printer = gtk_print_unix_dialog_get_selected_printer (GTK_PRINT_UNIX_DIALOG (pd));
      if (printer == NULL)
	goto out;
      
      rdata->do_print = TRUE;

      settings = gtk_print_unix_dialog_get_settings (GTK_PRINT_UNIX_DIALOG (pd));
      page_setup = gtk_print_unix_dialog_get_page_setup (GTK_PRINT_UNIX_DIALOG (pd));

      g_signal_emit_by_name (rdata->op, "custom-widget-apply", rdata->op->priv->custom_widget);
    } 

 out:  
  finish_print (rdata, printer, page_setup, settings);

  if (settings)
    g_object_unref (settings);
  
  gtk_widget_destroy (GTK_WIDGET (pd));
}


static void
found_printer (GtkPrinter *printer,
	       PrintResponseData *rdata)
{
  GtkPrintOperation *op = rdata->op;
  GtkPrintOperationPrivate *priv = op->priv;
  GtkPrintSettings *settings = NULL;
  GtkPageSetup *page_setup = NULL;
  
  if (rdata->loop)
    g_main_loop_quit (rdata->loop);

  if (printer != NULL) {
      rdata->result = GTK_PRINT_OPERATION_RESULT_APPLY;

      rdata->do_print = TRUE;

      if (priv->print_settings)
	settings = gtk_print_settings_copy (priv->print_settings);
      else
	settings = gtk_print_settings_new ();

      gtk_print_settings_set_printer (settings,
				      gtk_printer_get_name (printer));
      
      if (priv->default_page_setup)
	page_setup = gtk_page_setup_copy (priv->default_page_setup);
      else
	page_setup = gtk_page_setup_new ();
  }
  
  finish_print (rdata, printer, page_setup, settings);

  if (settings)
    g_object_unref (settings);
  
  if (page_setup)
    g_object_unref (page_setup);
}

void
_gtk_print_operation_platform_backend_run_dialog_async (GtkPrintOperation          *op,
                                                        GtkWindow                  *parent,
							GtkPrintOperationPrintFunc  print_cb)
{
  GtkWidget *pd;
  PrintResponseData *rdata;
  const char *printer_name;

  rdata = g_new (PrintResponseData, 1);
  rdata->op = g_object_ref (op);
  rdata->do_print = FALSE;
  rdata->result = GTK_PRINT_OPERATION_RESULT_CANCEL;
  rdata->error = NULL;
  rdata->print_cb = print_cb;
  rdata->parent = parent;
  rdata->loop = NULL;
  rdata->destroy = print_response_data_free;
  
  if (op->priv->show_dialog)
    {
      pd = get_print_dialog (op, parent);
      gtk_window_set_modal (GTK_WINDOW (pd), TRUE);

      g_signal_connect (pd, "response", 
			G_CALLBACK (handle_print_response), rdata);
      
      gtk_window_present (GTK_WINDOW (pd));
    }
  else
    {
      printer_name = NULL;
      if (op->priv->print_settings)
	printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
      
      find_printer (printer_name,
		    (GFunc) found_printer, rdata);
    }
}

GtkPrintOperationResult
_gtk_print_operation_platform_backend_run_dialog (GtkPrintOperation *op,
						  GtkWindow         *parent,
						  gboolean          *do_print,
						  GError           **error)
 {
  GtkWidget *pd;
  PrintResponseData rdata;
  gint response;  
  const char *printer_name;
   
  rdata.op = op;
  rdata.do_print = FALSE;
  rdata.result = GTK_PRINT_OPERATION_RESULT_CANCEL;
  rdata.error = error;
  rdata.print_cb = NULL;
  rdata.destroy = NULL;
  rdata.parent = parent;
  rdata.loop = NULL;

  if (op->priv->show_dialog)
    {
      pd = get_print_dialog (op, parent);
      response = gtk_dialog_run (GTK_DIALOG (pd));
      handle_print_response (pd, response, &rdata);
    }
  else
    {
      printer_name = NULL;
      if (op->priv->print_settings)
	printer_name = gtk_print_settings_get_printer (op->priv->print_settings);
      
      rdata.loop = g_main_loop_new (NULL, FALSE);
      find_printer (printer_name,
		    (GFunc) found_printer, &rdata);

      GDK_THREADS_LEAVE ();  
      g_main_loop_run (rdata.loop);
      GDK_THREADS_ENTER ();  

      g_main_loop_unref (rdata.loop);
    }

  *do_print = rdata.do_print;
  
  return rdata.result;
}


typedef struct {
  GtkPageSetup         *page_setup;
  GtkPageSetupDoneFunc  done_cb;
  gpointer              data;
  GDestroyNotify        destroy;
} PageSetupResponseData;

static void
page_setup_data_free (gpointer data)
{
  PageSetupResponseData *rdata = data;

  g_object_unref (rdata->page_setup);
  g_free (rdata);
}

static void
handle_page_setup_response (GtkWidget *dialog,
			    gint       response,
			    gpointer   data)
{
  GtkPageSetupUnixDialog *psd;
  PageSetupResponseData *rdata = data;

  psd = GTK_PAGE_SETUP_UNIX_DIALOG (dialog);
  if (response == GTK_RESPONSE_OK)
    rdata->page_setup = gtk_page_setup_unix_dialog_get_page_setup (psd);

  gtk_widget_destroy (dialog);

  if (rdata->done_cb)
    rdata->done_cb (rdata->page_setup, rdata->data);

  if (rdata->destroy)
    rdata->destroy (rdata);
}

static GtkWidget *
get_page_setup_dialog (GtkWindow        *parent,
		       GtkPageSetup     *page_setup,
		       GtkPrintSettings *settings)
{
  GtkWidget *dialog;

  dialog = gtk_page_setup_unix_dialog_new (NULL, parent);
  if (page_setup)
    gtk_page_setup_unix_dialog_set_page_setup (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
					       page_setup);
  gtk_page_setup_unix_dialog_set_print_settings (GTK_PAGE_SETUP_UNIX_DIALOG (dialog),
						 settings);

  return dialog;
}

/**
 * gtk_print_run_page_setup_dialog:
 * @parent: transient parent, or %NULL
 * @page_setup: an existing #GtkPageSetup, or %NULL
 * @settings: a #GtkPrintSettings
 * 
 * Runs a page setup dialog, letting the user modify the values from 
 * @page_setup. If the user cancels the dialog, the returned #GtkPageSetup 
 * is identical to the passed in @page_setup, otherwise it contains the 
 * modifications done in the dialog.
 *
 * Note that this function may use a recursive mainloop to show the page
 * setup dialog. See gtk_print_run_page_setup_dialog_async() if this is 
 * a problem.
 * 
 * Return value: a new #GtkPageSetup
 *
 * Since: 2.10
 */
GtkPageSetup *
gtk_print_run_page_setup_dialog (GtkWindow        *parent,
				 GtkPageSetup     *page_setup,
				 GtkPrintSettings *settings)
{
  GtkWidget *dialog;
  gint response;
  PageSetupResponseData rdata;  
  
  rdata.page_setup = NULL;
  rdata.done_cb = NULL;
  rdata.data = NULL;
  rdata.destroy = NULL;

  dialog = get_page_setup_dialog (parent, page_setup, settings);
  response = gtk_dialog_run (GTK_DIALOG (dialog));
  handle_page_setup_response (dialog, response, &rdata);
 
  if (rdata.page_setup)
    return rdata.page_setup;
  else if (page_setup)
    return gtk_page_setup_copy (page_setup);
  else
    return gtk_page_setup_new ();
}

/**
 * gtk_print_run_page_setup_dialog_async:
 * @parent: transient parent, or %NULL
 * @page_setup: an existing #GtkPageSetup, or %NULL
 * @settings: a #GtkPrintSettings
 * @done_cb: a function to call when the user saves the modified page setup
 * @data: user data to pass to @done_cb
 * 
 * Runs a page setup dialog, letting the user modify the values from @page_setup. 
 *
 * In contrast to gtk_print_run_page_setup_dialog(), this function  returns after 
 * showing the page setup dialog on platforms that support this, and calls @done_cb 
 * from a signal handler for the ::response signal of the dialog.
 *
 * Since: 2.10
 */
void
gtk_print_run_page_setup_dialog_async (GtkWindow            *parent,
				       GtkPageSetup         *page_setup,
				       GtkPrintSettings     *settings,
				       GtkPageSetupDoneFunc  done_cb,
				       gpointer              data)
{
  GtkWidget *dialog;
  PageSetupResponseData *rdata;
  
  dialog = get_page_setup_dialog (parent, page_setup, settings);
  gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
  
  rdata = g_new (PageSetupResponseData, 1);
  rdata->page_setup = NULL;
  rdata->done_cb = done_cb;
  rdata->data = data;
  rdata->destroy = page_setup_data_free;

  g_signal_connect (dialog, "response",
		    G_CALLBACK (handle_page_setup_response), rdata);
 
  gtk_window_present (GTK_WINDOW (dialog));
 }

struct _PrinterFinder {
  gboolean found_printer;
  GFunc func;
  gpointer data;
  char *printer_name;
  GList *backends;
  guint timeout_tag;
  GtkPrinter *printer;
  GtkPrinter *default_printer;
  GtkPrinter *first_printer;
};

static gboolean
find_printer_idle (gpointer data)
{
  PrinterFinder *finder = data;
  GtkPrinter *printer;

  if (finder->printer != NULL)
    printer = finder->printer;
  else if (finder->default_printer != NULL)
    printer = finder->default_printer;
  else if (finder->first_printer != NULL)
    printer = finder->first_printer;
  else
    printer = NULL;

  finder->func (printer, finder->data);
  
  printer_finder_free (finder);

  return FALSE;
}

static void
printer_added_cb (GtkPrintBackend *backend, 
                  GtkPrinter      *printer, 
		  PrinterFinder   *finder)
{
  if (gtk_printer_is_virtual (printer) ||
      finder->found_printer)
    return;

  if (finder->printer_name != NULL &&
      strcmp (gtk_printer_get_name (printer), finder->printer_name) == 0)
    {
      finder->printer = g_object_ref (printer);
      finder->found_printer = TRUE;
    }
  else if (finder->default_printer == NULL &&
	   gtk_printer_is_default (printer))
    {
      finder->default_printer = g_object_ref (printer);
      if (finder->printer_name == NULL)
	finder->found_printer = TRUE;
    }
  else
    if (finder->first_printer == NULL)
      finder->first_printer = g_object_ref (printer);
  
  if (finder->found_printer)
    g_idle_add (find_printer_idle, finder);
}

static void
printer_list_done_cb (GtkPrintBackend *backend, 
		      PrinterFinder   *finder)
{
  finder->backends = g_list_remove (finder->backends, backend);
  
  g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
  g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
  
  gtk_print_backend_destroy (backend);
  g_object_unref (backend);

  if (finder->backends == NULL && !finder->found_printer)
    g_idle_add (find_printer_idle, finder);
}

static void
find_printer_init (PrinterFinder *finder,
		   GtkPrintBackend *backend)
{
  GList *list;
  GList *node;

  list = gtk_print_backend_get_printer_list (backend);

  node = list;
  while (node != NULL)
    {
      printer_added_cb (backend, node->data, finder);
      node = node->next;

      if (finder->found_printer)
	break;
    }

  g_list_free (list);

  if (gtk_print_backend_printer_list_is_done (backend))
    {
      finder->backends = g_list_remove (finder->backends, backend);
      gtk_print_backend_destroy (backend);
      g_object_unref (backend);
    }
  else
    {
      g_signal_connect (backend, 
			"printer-added", 
			(GCallback) printer_added_cb, 
			finder);
      g_signal_connect (backend, 
			"printer-list-done", 
			(GCallback) printer_list_done_cb, 
			finder);
    }

}

static void
printer_finder_free (PrinterFinder *finder)
{
  GList *l;
  
  g_free (finder->printer_name);
  
  if (finder->printer)
    g_object_unref (finder->printer);
  
  if (finder->default_printer)
    g_object_unref (finder->default_printer);
  
  if (finder->first_printer)
    g_object_unref (finder->first_printer);

  for (l = finder->backends; l != NULL; l = l->next)
    {
      GtkPrintBackend *backend = l->data;
      g_signal_handlers_disconnect_by_func (backend, printer_added_cb, finder);
      g_signal_handlers_disconnect_by_func (backend, printer_list_done_cb, finder);
      gtk_print_backend_destroy (backend);
      g_object_unref (backend);
    }
  
  g_list_free (finder->backends);
  
  g_free (finder);
}

static void 
find_printer (const char *printer,
	      GFunc func,
	      gpointer data)
{
  GList *node, *next;
  PrinterFinder *finder;

  finder = g_new0 (PrinterFinder, 1);

  finder->printer_name = g_strdup (printer);
  finder->func = func;
  finder->data = data;
  
  finder->backends = NULL;
  if (g_module_supported ())
    finder->backends = gtk_print_backend_load_modules ();

  for (node = finder->backends; !finder->found_printer && node != NULL; node = next)
    {
      next = node->next;
      find_printer_init (finder, GTK_PRINT_BACKEND (node->data));
    }

  if (finder->backends == NULL && !finder->found_printer)
    g_idle_add (find_printer_idle, finder);
}

#define __GTK_PRINT_OPERATION_UNIX_C__
#include "gtkaliasdef.c"