/*
 * pluma-io-error-message-area.c
 * This file is part of pluma
 *
 * Copyright (C) 2005 - Paolo Maggi 
 *
 * 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., 51 Franklin St, Fifth Floor, 
 * Boston, MA 02110-1301, USA.
 */
 
/*
 * Modified by the pluma Team, 2005. See the AUTHORS file for a 
 * list of people on the pluma Team.  
 * See the ChangeLog files for a list of changes. 
 *
 * $Id$
 */
 
/*
 * Verbose error reporting for file I/O operations (load, save, revert, create)
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <errno.h>
#include <string.h>

#include <glib/gi18n.h>
#include <gio/gio.h>

#include "pluma-utils.h"
#include "pluma-document.h"
#include "pluma-io-error-message-area.h"
#include "pluma-prefs-manager.h"
#include <pluma/pluma-encodings-combo-box.h>

#define MAX_URI_IN_DIALOG_LENGTH 50

#if GTK_CHECK_VERSION (3, 0, 0)
#define gtk_hbox_new(X,Y) gtk_box_new(GTK_ORIENTATION_HORIZONTAL,Y)
#define gtk_vbox_new(X,Y) gtk_box_new(GTK_ORIENTATION_VERTICAL,Y)
#endif

static gboolean
is_recoverable_error (const GError *error)
{
	gboolean is_recoverable = FALSE;

	if (error->domain == G_IO_ERROR)
	{
		switch (error->code) {
		case G_IO_ERROR_PERMISSION_DENIED:
		case G_IO_ERROR_NOT_FOUND:
		case G_IO_ERROR_HOST_NOT_FOUND:
		case G_IO_ERROR_TIMED_OUT:
		case G_IO_ERROR_NOT_MOUNTABLE_FILE:
		case G_IO_ERROR_NOT_MOUNTED:
		case G_IO_ERROR_BUSY:
			is_recoverable = TRUE;
		}
	}

	return is_recoverable;
}

static gboolean
is_gio_error (const GError *error,
	      gint          code)
{
	return error->domain == G_IO_ERROR && error->code == code;
}

static void
set_contents (GtkWidget *area,
	      GtkWidget *contents)
{
	GtkWidget *content_area;
	
	content_area = gtk_info_bar_get_content_area (GTK_INFO_BAR (area));
	gtk_container_add (GTK_CONTAINER (content_area), contents);
}

static void
info_bar_add_stock_button_with_text (GtkInfoBar  *infobar,
				     const gchar *text,
				     const gchar *stock_id,
				     gint         response_id)
{
	GtkWidget *button;
	GtkWidget *image;

	button = gtk_info_bar_add_button (infobar, text, response_id);
	image = gtk_image_new_from_stock (stock_id, GTK_ICON_SIZE_BUTTON);
	gtk_button_set_image (GTK_BUTTON (button), image);
}

static void
set_message_area_text_and_icon (GtkWidget   *message_area,
				const gchar *icon_stock_id,
				const gchar *primary_text,
				const gchar *secondary_text)
{
	GtkWidget *hbox_content;
	GtkWidget *image;
	GtkWidget *vbox;
	gchar *primary_markup;
	gchar *secondary_markup;
	GtkWidget *primary_label;
	GtkWidget *secondary_label;

	hbox_content = gtk_hbox_new (FALSE, 8);

	image = gtk_image_new_from_stock (icon_stock_id, GTK_ICON_SIZE_DIALOG);
	gtk_box_pack_start (GTK_BOX (hbox_content), image, FALSE, FALSE, 0);
#if GTK_CHECK_VERSION (3, 0, 0)
	gtk_widget_set_halign (image, GTK_ALIGN_CENTER);
	gtk_widget_set_valign (image, GTK_ALIGN_START);
#else
	gtk_misc_set_alignment (GTK_MISC (image), 0.5, 0.0);
#endif

	vbox = gtk_vbox_new (FALSE, 6);
	gtk_box_pack_start (GTK_BOX (hbox_content), vbox, TRUE, TRUE, 0);

	primary_markup = g_strdup_printf ("<b>%s</b>", primary_text);
	primary_label = gtk_label_new (primary_markup);
	g_free (primary_markup);
	gtk_box_pack_start (GTK_BOX (vbox), primary_label, TRUE, TRUE, 0);
	gtk_label_set_use_markup (GTK_LABEL (primary_label), TRUE);
	gtk_label_set_line_wrap (GTK_LABEL (primary_label), TRUE);
#if GTK_CHECK_VERSION (3, 16, 0)
	gtk_label_set_xalign (GTK_LABEL (primary_label), 0.0);
#else
	gtk_misc_set_alignment (GTK_MISC (primary_label), 0.0, 0.5);
#endif
	gtk_widget_set_can_focus (primary_label, TRUE);
	gtk_label_set_selectable (GTK_LABEL (primary_label), TRUE);

	if (secondary_text != NULL)
	{
		secondary_markup = g_strdup_printf ("<small>%s</small>",
						    secondary_text);
		secondary_label = gtk_label_new (secondary_markup);
		g_free (secondary_markup);
		gtk_box_pack_start (GTK_BOX (vbox), secondary_label, TRUE, TRUE, 0);
		gtk_widget_set_can_focus (secondary_label, TRUE);
		gtk_label_set_use_markup (GTK_LABEL (secondary_label), TRUE);
		gtk_label_set_line_wrap (GTK_LABEL (secondary_label), TRUE);
		gtk_label_set_selectable (GTK_LABEL (secondary_label), TRUE);
#if GTK_CHECK_VERSION (3, 16, 0)
		gtk_label_set_xalign (GTK_LABEL (secondary_label), 0.0);
#else
		gtk_misc_set_alignment (GTK_MISC (secondary_label), 0.0, 0.5);
#endif
	}

	gtk_widget_show_all (hbox_content);
	set_contents (message_area, hbox_content);
}

static GtkWidget *
create_io_loading_error_message_area (const gchar *primary_text,
				      const gchar *secondary_text,
				      gboolean     recoverable_error)
{
	GtkWidget *message_area;

	message_area = gtk_info_bar_new_with_buttons (
					GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
					NULL);
	gtk_info_bar_set_message_type (GTK_INFO_BAR (message_area),
				       GTK_MESSAGE_ERROR);

	set_message_area_text_and_icon (message_area,
					"gtk-dialog-error",
					primary_text,
					secondary_text);

	if (recoverable_error)
	{
		info_bar_add_stock_button_with_text (GTK_INFO_BAR (message_area),
						     _("_Retry"),
						     GTK_STOCK_REFRESH,
						     GTK_RESPONSE_OK);
	}

	return message_area;
}

static gboolean
parse_gio_error (gint          code,
	         gchar       **error_message, 
	         gchar       **message_details, 
	         const gchar  *uri, 
	         const gchar  *uri_for_display)
{
	gboolean ret = TRUE;

	switch (code)
	{
	case G_IO_ERROR_NOT_FOUND:
	case G_IO_ERROR_NOT_DIRECTORY:
		*error_message = g_strdup_printf (_("Could not find the file %s."),
						  uri_for_display);
		*message_details = g_strdup (_("Please check that you typed the "
				      	       "location correctly and try again."));
		break;
	case G_IO_ERROR_NOT_SUPPORTED:
		{
			gchar *scheme_string;
			gchar *scheme_markup;
			
			scheme_string = g_uri_parse_scheme (uri);

			if ((scheme_string != NULL) && g_utf8_validate (scheme_string, -1, NULL))
			{
				scheme_markup = g_markup_printf_escaped ("<i>%s:</i>", scheme_string);

				/* Translators: %s is a URI scheme (like for example http:, ftp:, etc.) */
				*message_details = g_strdup_printf (_("pluma cannot handle %s locations."),
								   scheme_markup);
				g_free (scheme_markup);
			}
			else
			{
				*message_details = g_strdup (_("pluma cannot handle this location."));
			}	

			g_free (scheme_string);
		}
		break;

	case G_IO_ERROR_NOT_MOUNTABLE_FILE:
		*message_details = g_strdup (_("The location of the file cannot be mounted."));
		break;
	
	case G_IO_ERROR_NOT_MOUNTED:
		*message_details = g_strdup( _("The location of the file cannot be accessed because it is not mounted."));

		break;	
	case G_IO_ERROR_IS_DIRECTORY:
		*error_message = g_strdup_printf (_("%s is a directory."),
						 uri_for_display);
		*message_details = g_strdup (_("Please check that you typed the "
					      "location correctly and try again."));
		break;
		
	case G_IO_ERROR_INVALID_FILENAME:
		*error_message = g_strdup_printf (_("%s is not a valid location."),
						 uri_for_display);
		*message_details = g_strdup (_("Please check that you typed the "
					      "location correctly and try again."));
		break;
		
	case G_IO_ERROR_HOST_NOT_FOUND:
		/* This case can be hit for user-typed strings like "foo" due to
		 * the code that guesses web addresses when there's no initial "/".
		 * But this case is also hit for legitimate web addresses when
		 * the proxy is set up wrong.
		 */
		{
			gchar *hn = NULL;

			if (pluma_utils_decode_uri (uri, NULL, NULL, &hn, NULL, NULL))
			{
				if (hn != NULL)
				{
					gchar *host_markup;
					gchar *host_name;

					host_name = pluma_utils_make_valid_utf8 (hn);
					g_free (hn);

					host_markup = g_markup_printf_escaped ("<i>%s</i>", host_name);
					g_free (host_name);

					/* Translators: %s is a host name */
					*message_details = g_strdup_printf (
						_("Host %s could not be found. "
						"Please check that your proxy settings "
						"are correct and try again."),
						host_markup);

					g_free (host_markup);
				}
			}
			
			if (!*message_details)
			{
				/* use the same string as INVALID_HOST */
				*message_details = g_strdup_printf (
					_("Hostname was invalid. "
					  "Please check that you typed the location "
					  "correctly and try again."));
			}
		}
		break;

	case G_IO_ERROR_NOT_REGULAR_FILE:
		*message_details = g_strdup_printf (_("%s is not a regular file."),
						   uri_for_display);
		break;

	case G_IO_ERROR_TIMED_OUT:
		*message_details = g_strdup (_("Connection timed out. Please try again."));
		break;

	default:
		ret = FALSE;
		break;
	}

	return ret;
}

static gboolean
parse_pluma_error (gint          code,
	           gchar       **error_message, 
	           gchar       **message_details, 
	           const gchar  *uri, 
	           const gchar  *uri_for_display)
{
	gboolean ret = TRUE;

	switch (code)
	{
	case PLUMA_DOCUMENT_ERROR_TOO_BIG:
		*message_details = g_strdup (_("The file is too big."));
		break;

	default:
		ret = FALSE;
		break;
	}

	return ret;
}

static void
parse_error (const GError *error, 
	     gchar       **error_message, 
	     gchar       **message_details, 
	     const gchar  *uri, 
	     const gchar  *uri_for_display)
{
	gboolean ret = FALSE;

	if (error->domain == G_IO_ERROR)
	{
		ret = parse_gio_error (error->code,
				       error_message,
				       message_details,
				       uri,
				       uri_for_display);
	}
	else if (error->domain == PLUMA_DOCUMENT_ERROR)
	{
		ret = parse_pluma_error (error->code,
					 error_message,
					 message_details,
					 uri,
					 uri_for_display);
	}
	
	if (!ret)
	{
		g_warning ("Hit unhandled case %d (%s) in %s.", 
			   error->code, error->message, G_STRFUNC);	
		*message_details = g_strdup_printf (_("Unexpected error: %s"), 
						   error->message);
	}
}

GtkWidget *
pluma_unrecoverable_reverting_error_message_area_new (const gchar  *uri,
						      const GError *error)
{
	gchar *error_message = NULL;
	gchar *message_details = NULL;
	gchar *full_formatted_uri;
	gchar *uri_for_display;
	gchar *temp_uri_for_display;
	GtkWidget *message_area;

	g_return_val_if_fail (uri != NULL, NULL);
	g_return_val_if_fail (error != NULL, NULL);
	g_return_val_if_fail ((error->domain == PLUMA_DOCUMENT_ERROR) || 
			      (error->domain == G_IO_ERROR), NULL);

	full_formatted_uri = pluma_utils_uri_for_display (uri);

	/* Truncate the URI so it doesn't get insanely wide. Note that even
	 * though the dialog uses wrapped text, if the URI doesn't contain
	 * white space then the text-wrapping code is too stupid to wrap it.
	 */
	temp_uri_for_display = pluma_utils_str_middle_truncate (full_formatted_uri, 
								MAX_URI_IN_DIALOG_LENGTH);								
	g_free (full_formatted_uri);

	uri_for_display = g_markup_printf_escaped ("<i>%s</i>", temp_uri_for_display);
	g_free (temp_uri_for_display);

	if (is_gio_error (error, G_IO_ERROR_NOT_FOUND))
	{
		message_details = g_strdup (_("pluma cannot find the file. "
					      "Perhaps it has recently been deleted."));
	}
	else
	{
		parse_error (error, &error_message, &message_details, uri, uri_for_display);
	}

	if (error_message == NULL)
	{
		error_message = g_strdup_printf (_("Could not revert the file %s."),
						 uri_for_display);
	}

	message_area = create_io_loading_error_message_area (error_message,
							     message_details,
							     FALSE);

	g_free (uri_for_display);
	g_free (error_message);
	g_free (message_details);

	return message_area;
}

static void
create_combo_box (GtkWidget *message_area, GtkWidget *vbox)
{
	GtkWidget *hbox;
	GtkWidget *label;
	GtkWidget *menu;
	gchar *label_markup;

	hbox = gtk_hbox_new (FALSE, 6);

	label_markup = g_strdup_printf ("<small>%s</small>",
					_("Ch_aracter Encoding:"));
	label = gtk_label_new_with_mnemonic (label_markup);
	g_free (label_markup);
	gtk_label_set_use_markup (GTK_LABEL (label), TRUE);
	menu = pluma_encodings_combo_box_new (TRUE);
	g_object_set_data (G_OBJECT (message_area), 
			   "pluma-message-area-encoding-menu", 
			   menu);

	gtk_label_set_mnemonic_widget (GTK_LABEL (label), menu);
	gtk_box_pack_start (GTK_BOX (hbox),
			    label,
			    FALSE,
			    FALSE,
			    0);

	gtk_box_pack_start (GTK_BOX (hbox),
			    menu,
			    FALSE,
			    FALSE,
			    0);

	gtk_widget_show_all (hbox);
	gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, TRUE, 0);
}

static GtkWidget *
create_conversion_error_message_area (const gchar *primary_text,
				      const gchar *secondary_text,
				      gboolean     edit_anyway)
{
	GtkWidget *message_area;
	GtkWidget *hbox_content;
	GtkWidget *image;
	GtkWidget *vbox;
	gchar *primary_markup;
	gchar *secondary_markup;
	GtkWidget *primary_label;
	GtkWidget *secondary_label;

	message_area = gtk_info_bar_new ();

	info_bar_add_stock_button_with_text (GTK_INFO_BAR (message_area),
					     _("_Retry"),
					     GTK_STOCK_REDO,
					     GTK_RESPONSE_OK);

	if (edit_anyway)
	{
		gtk_info_bar_add_button (GTK_INFO_BAR (message_area),
		/* Translators: the access key chosen for this string should be
		 different from other main menu access keys (Open, Edit, View...) */
					 _("Edit Any_way"),
					 GTK_RESPONSE_YES);
		gtk_info_bar_add_button (GTK_INFO_BAR (message_area),
		/* Translators: the access key chosen for this string should be
		 different from other main menu access keys (Open, Edit, View...) */
					 _("D_on't Edit"),
					 GTK_RESPONSE_NO);
		gtk_info_bar_set_message_type (GTK_INFO_BAR (message_area),
					       GTK_MESSAGE_WARNING);
	}
	else
	{
		gtk_info_bar_add_button (GTK_INFO_BAR (message_area),
					 GTK_STOCK_CANCEL,
					 GTK_RESPONSE_CANCEL);
		gtk_info_bar_set_message_type (GTK_INFO_BAR (message_area),
					       GTK_MESSAGE_ERROR);
	}

	hbox_content = gtk_hbox_new (FALSE, 8);

	image = gtk_image_new_from_stock ("gtk-dialog-error", GTK_ICON_SIZE_DIALOG);
	gtk_box_pack_start (GTK_BOX (hbox_content), image, FALSE, FALSE, 0);
#if GTK_CHECK_VERSION (3, 0, 0)
	gtk_widget_set_halign (image, GTK_ALIGN_CENTER);
	gtk_widget_set_valign (image, GTK_ALIGN_START);
#else
	gtk_misc_set_alignment (GTK_MISC (image), 0.5, 0.0);
#endif
  
	vbox = gtk_vbox_new (FALSE, 6);
	gtk_box_pack_start (GTK_BOX (hbox_content), vbox, TRUE, TRUE, 0);
	
	primary_markup = g_strdup_printf ("<b>%s</b>", primary_text);
	primary_label = gtk_label_new (primary_markup);
	g_free (primary_markup);
	gtk_box_pack_start (GTK_BOX (vbox), primary_label, TRUE, TRUE, 0);
	gtk_label_set_use_markup (GTK_LABEL (primary_label), TRUE);
	gtk_label_set_line_wrap (GTK_LABEL (primary_label), TRUE);
#if GTK_CHECK_VERSION (3, 16, 0)
	gtk_label_set_xalign (GTK_LABEL (primary_label), 0.0);
#else
	gtk_misc_set_alignment (GTK_MISC (primary_label), 0.0, 0.5);
#endif
	gtk_widget_set_can_focus (primary_label, TRUE);
	gtk_label_set_selectable (GTK_LABEL (primary_label), TRUE);

	if (secondary_text != NULL)
	{
		secondary_markup = g_strdup_printf ("<small>%s</small>",
						    secondary_text);
		secondary_label = gtk_label_new (secondary_markup);
		g_free (secondary_markup);
		gtk_box_pack_start (GTK_BOX (vbox), secondary_label, TRUE, TRUE, 0);
		gtk_widget_set_can_focus (secondary_label, TRUE);
		gtk_label_set_use_markup (GTK_LABEL (secondary_label), TRUE);
		gtk_label_set_line_wrap (GTK_LABEL (secondary_label), TRUE);
		gtk_label_set_selectable (GTK_LABEL (secondary_label), TRUE);
#if GTK_CHECK_VERSION (3, 16, 0)
		gtk_label_set_xalign (GTK_LABEL (secondary_label), 0.0);
#else
		gtk_misc_set_alignment (GTK_MISC (secondary_label), 0.0, 0.5);
#endif
	}

	create_combo_box (message_area, vbox);
	gtk_widget_show_all (hbox_content);
	set_contents (message_area, hbox_content);

	return message_area;
}

GtkWidget *
pluma_io_loading_error_message_area_new (const gchar         *uri,
					 const PlumaEncoding *encoding,
					 const GError        *error)
{
	gchar *error_message = NULL;
	gchar *message_details = NULL;
	gchar *full_formatted_uri;
	gchar *encoding_name;
	gchar *uri_for_display;
	gchar *temp_uri_for_display;
	GtkWidget *message_area;
	gboolean edit_anyway = FALSE;
	gboolean convert_error = FALSE;
	
	g_return_val_if_fail (uri != NULL, NULL);
	g_return_val_if_fail (error != NULL, NULL);
	g_return_val_if_fail ((error->domain == G_CONVERT_ERROR) ||
			      (error->domain == PLUMA_DOCUMENT_ERROR) ||
			      (error->domain == G_IO_ERROR), NULL);
	
	full_formatted_uri = pluma_utils_uri_for_display (uri);

	/* Truncate the URI so it doesn't get insanely wide. Note that even
	 * though the dialog uses wrapped text, if the URI doesn't contain
	 * white space then the text-wrapping code is too stupid to wrap it.
	 */
	temp_uri_for_display = pluma_utils_str_middle_truncate (full_formatted_uri,
								MAX_URI_IN_DIALOG_LENGTH);
	g_free (full_formatted_uri);
	
	uri_for_display = g_markup_printf_escaped ("<i>%s</i>", temp_uri_for_display);
	g_free (temp_uri_for_display);

	if (encoding != NULL)
		encoding_name = pluma_encoding_to_string (encoding);
	else
		encoding_name = g_strdup ("UTF-8");

	if (is_gio_error (error, G_IO_ERROR_TOO_MANY_LINKS))
	{
		message_details = g_strdup (_("The number of followed links is limited and the actual file could not be found within this limit."));
	}
	else if (is_gio_error (error, G_IO_ERROR_PERMISSION_DENIED))
	{
		message_details = g_strdup (_("You do not have the permissions necessary to open the file."));
	}
	else if ((is_gio_error (error, G_IO_ERROR_INVALID_DATA) && encoding == NULL) ||
	         (error->domain == PLUMA_DOCUMENT_ERROR &&
	         error->code == PLUMA_DOCUMENT_ERROR_ENCODING_AUTO_DETECTION_FAILED))
	{
		message_details = g_strconcat (_("pluma has not been able to detect "
					         "the character encoding."), "\n",
					       _("Please check that you are not trying to open a binary file."), "\n",
					       _("Select a character encoding from the menu and try again."), NULL);
		convert_error = TRUE;
	}
	else if (error->domain == PLUMA_DOCUMENT_ERROR &&
	         error->code == PLUMA_DOCUMENT_ERROR_CONVERSION_FALLBACK)
	{
		error_message = g_strdup_printf (_("There was a problem opening the file %s."),
						 uri_for_display);
		message_details = g_strconcat (_("The file you opened has some invalid characters. "
					       "If you continue editing this file you could make this "
					       "document useless."), "\n",
					       _("You can also choose another character encoding and try again."),
					       NULL);
		edit_anyway = TRUE;
		convert_error = TRUE;
	}
	else if (is_gio_error (error, G_IO_ERROR_INVALID_DATA) && encoding != NULL)
	{
		error_message = g_strdup_printf (_("Could not open the file %s using the %s character encoding."),
						 uri_for_display, 
						 encoding_name);
		message_details = g_strconcat (_("Please check that you are not trying to open a binary file."), "\n",
					       _("Select a different character encoding from the menu and try again."), NULL);
		convert_error = TRUE;
	}
	else
	{
		parse_error (error, &error_message, &message_details, uri, uri_for_display);
	}

	if (error_message == NULL)
	{
		error_message = g_strdup_printf (_("Could not open the file %s."),
						 uri_for_display);
	}

	if (convert_error)
	{
		message_area = create_conversion_error_message_area (error_message,
								     message_details,
								     edit_anyway);
	}
	else
	{
		message_area = create_io_loading_error_message_area (error_message,
								     message_details,
								     is_recoverable_error (error));
	}

	g_free (uri_for_display);
	g_free (encoding_name);
	g_free (error_message);
	g_free (message_details);
	
	return message_area;
}

GtkWidget *
pluma_conversion_error_while_saving_message_area_new (
						const gchar         *uri,
						const PlumaEncoding *encoding,
				    		const GError        *error)
{
	gchar *error_message = NULL;
	gchar *message_details = NULL;
	gchar *full_formatted_uri;
	gchar *encoding_name;
	gchar *uri_for_display;
	gchar *temp_uri_for_display;
	GtkWidget *message_area;
	
	g_return_val_if_fail (uri != NULL, NULL);
	g_return_val_if_fail (error != NULL, NULL);
	g_return_val_if_fail (error->domain == G_CONVERT_ERROR ||
	                      error->domain == G_IO_ERROR, NULL);
	g_return_val_if_fail (encoding != NULL, NULL);
	
	full_formatted_uri = pluma_utils_uri_for_display (uri);

	/* Truncate the URI so it doesn't get insanely wide. Note that even
	 * though the dialog uses wrapped text, if the URI doesn't contain
	 * white space then the text-wrapping code is too stupid to wrap it.
	 */
	temp_uri_for_display = pluma_utils_str_middle_truncate (full_formatted_uri, 
								MAX_URI_IN_DIALOG_LENGTH);								
	g_free (full_formatted_uri);
	
	uri_for_display = g_markup_printf_escaped ("<i>%s</i>", temp_uri_for_display);
	g_free (temp_uri_for_display);

	encoding_name = pluma_encoding_to_string (encoding);
	
	error_message = g_strdup_printf (_("Could not save the file %s using the %s character encoding."),
					 uri_for_display, 
					 encoding_name);
	message_details = g_strconcat (_("The document contains one or more characters that cannot be encoded "
					 "using the specified character encoding."), "\n",
				       _("Select a different character encoding from the menu and try again."), NULL);
	
	message_area = create_conversion_error_message_area (
								error_message,
								message_details,
								FALSE);

	g_free (uri_for_display);
	g_free (encoding_name);
	g_free (error_message);
	g_free (message_details);
	
	return message_area;
}

const PlumaEncoding *
pluma_conversion_error_message_area_get_encoding (GtkWidget *message_area)
{
	gpointer menu;

	g_return_val_if_fail (GTK_IS_INFO_BAR (message_area), NULL);

	menu = g_object_get_data (G_OBJECT (message_area), 
				  "pluma-message-area-encoding-menu");	
	g_return_val_if_fail (menu, NULL);
	
	return pluma_encodings_combo_box_get_selected_encoding
					(PLUMA_ENCODINGS_COMBO_BOX (menu));
}

GtkWidget *
pluma_file_already_open_warning_message_area_new (const gchar *uri)
{
	GtkWidget *message_area;
	GtkWidget *hbox_content;
	GtkWidget *image;
	GtkWidget *vbox;
	gchar *primary_markup;
	gchar *secondary_markup;
	GtkWidget *primary_label;
	GtkWidget *secondary_label;
	gchar *primary_text;
	const gchar *secondary_text;
	gchar *full_formatted_uri;
	gchar *uri_for_display;
	gchar *temp_uri_for_display;
	
	full_formatted_uri = pluma_utils_uri_for_display (uri);

	/* Truncate the URI so it doesn't get insanely wide. Note that even
	 * though the dialog uses wrapped text, if the URI doesn't contain
	 * white space then the text-wrapping code is too stupid to wrap it.
	 */
	temp_uri_for_display = pluma_utils_str_middle_truncate (full_formatted_uri, 
								MAX_URI_IN_DIALOG_LENGTH);								
	g_free (full_formatted_uri);
	
	uri_for_display = g_markup_printf_escaped ("<i>%s</i>", temp_uri_for_display);
	g_free (temp_uri_for_display);

	message_area = gtk_info_bar_new ();
	gtk_info_bar_add_button (GTK_INFO_BAR (message_area),
	/* Translators: the access key chosen for this string should be
	 different from other main menu access keys (Open, Edit, View...) */
				 _("Edit Any_way"),
				 GTK_RESPONSE_YES);
	gtk_info_bar_add_button (GTK_INFO_BAR (message_area),
	/* Translators: the access key chosen for this string should be
	 different from other main menu access keys (Open, Edit, View...) */
				 _("D_on't Edit"),
				 GTK_RESPONSE_CANCEL);
	gtk_info_bar_set_message_type (GTK_INFO_BAR (message_area),
				       GTK_MESSAGE_WARNING);

	hbox_content = gtk_hbox_new (FALSE, 8);

	image = gtk_image_new_from_stock ("gtk-dialog-warning", GTK_ICON_SIZE_DIALOG);
	gtk_box_pack_start (GTK_BOX (hbox_content), image, FALSE, FALSE, 0);
#if GTK_CHECK_VERSION (3, 0, 0)
	gtk_widget_set_halign (image, GTK_ALIGN_CENTER);
	gtk_widget_set_valign (image, GTK_ALIGN_START);
#else
	gtk_misc_set_alignment (GTK_MISC (image), 0.5, 0.0);
#endif

	vbox = gtk_vbox_new (FALSE, 6);
	gtk_box_pack_start (GTK_BOX (hbox_content), vbox, TRUE, TRUE, 0);

	primary_text = g_strdup_printf (_("This file (%s) is already open in another pluma window."), uri_for_display);
	g_free (uri_for_display);
	
	primary_markup = g_strdup_printf ("<b>%s</b>", primary_text);
	g_free (primary_text);
	primary_label = gtk_label_new (primary_markup);
	g_free (primary_markup);
	gtk_box_pack_start (GTK_BOX (vbox), primary_label, TRUE, TRUE, 0);
	gtk_label_set_use_markup (GTK_LABEL (primary_label), TRUE);
	gtk_label_set_line_wrap (GTK_LABEL (primary_label), TRUE);
#if GTK_CHECK_VERSION (3, 16, 0)
	gtk_label_set_xalign (GTK_LABEL (primary_label), 0.0);
#else
	gtk_misc_set_alignment (GTK_MISC (primary_label), 0.0, 0.5);
#endif
	gtk_widget_set_can_focus (primary_label, TRUE);
	gtk_label_set_selectable (GTK_LABEL (primary_label), TRUE);

	secondary_text = _("pluma opened this instance of the file in a non-editable way. "
			   "Do you want to edit it anyway?");
	secondary_markup = g_strdup_printf ("<small>%s</small>",
					    secondary_text);
	secondary_label = gtk_label_new (secondary_markup);
	g_free (secondary_markup);
	gtk_box_pack_start (GTK_BOX (vbox), secondary_label, TRUE, TRUE, 0);
	gtk_widget_set_can_focus (secondary_label, TRUE);
	gtk_label_set_use_markup (GTK_LABEL (secondary_label), TRUE);
	gtk_label_set_line_wrap (GTK_LABEL (secondary_label), TRUE);
	gtk_label_set_selectable (GTK_LABEL (secondary_label), TRUE);
#if GTK_CHECK_VERSION (3, 16, 0)
	gtk_label_set_xalign (GTK_LABEL (secondary_label), 0.0);
#else
	gtk_misc_set_alignment (GTK_MISC (secondary_label), 0.0, 0.5);
#endif

	gtk_widget_show_all (hbox_content);
	set_contents (message_area, hbox_content);

	return message_area;
}

GtkWidget *
pluma_externally_modified_saving_error_message_area_new (
						const gchar  *uri,
						const GError *error)
{
	GtkWidget *message_area;
	GtkWidget *hbox_content;
	GtkWidget *image;
	GtkWidget *vbox;
	gchar *primary_markup;
	gchar *secondary_markup;
	GtkWidget *primary_label;
	GtkWidget *secondary_label;
	gchar *primary_text;
	const gchar *secondary_text;
	gchar *full_formatted_uri;
	gchar *uri_for_display;
	gchar *temp_uri_for_display;

	g_return_val_if_fail (uri != NULL, NULL);
	g_return_val_if_fail (error != NULL, NULL);
	g_return_val_if_fail (error->domain == PLUMA_DOCUMENT_ERROR, NULL);
	g_return_val_if_fail (error->code == PLUMA_DOCUMENT_ERROR_EXTERNALLY_MODIFIED, NULL);

	full_formatted_uri = pluma_utils_uri_for_display (uri);

	/* Truncate the URI so it doesn't get insanely wide. Note that even
	 * though the dialog uses wrapped text, if the URI doesn't contain
	 * white space then the text-wrapping code is too stupid to wrap it.
	 */
	temp_uri_for_display = pluma_utils_str_middle_truncate (full_formatted_uri, 
								MAX_URI_IN_DIALOG_LENGTH);								
	g_free (full_formatted_uri);

	uri_for_display = g_markup_printf_escaped ("<i>%s</i>", temp_uri_for_display);
	g_free (temp_uri_for_display);

	message_area = gtk_info_bar_new ();
	
	info_bar_add_stock_button_with_text (GTK_INFO_BAR (message_area),
					     _("S_ave Anyway"),
					     GTK_STOCK_SAVE,
					     GTK_RESPONSE_YES);
	gtk_info_bar_add_button (GTK_INFO_BAR (message_area),
				 _("D_on't Save"),
				 GTK_RESPONSE_CANCEL);
	gtk_info_bar_set_message_type (GTK_INFO_BAR (message_area),
				       GTK_MESSAGE_WARNING);

	hbox_content = gtk_hbox_new (FALSE, 8);

	image = gtk_image_new_from_stock ("gtk-dialog-warning", GTK_ICON_SIZE_DIALOG);
	gtk_box_pack_start (GTK_BOX (hbox_content), image, FALSE, FALSE, 0);
#if GTK_CHECK_VERSION (3, 0, 0)
	gtk_widget_set_halign (image, GTK_ALIGN_CENTER);
	gtk_widget_set_valign (image, GTK_ALIGN_START);
#else
	gtk_misc_set_alignment (GTK_MISC (image), 0.5, 0.0);
#endif

	vbox = gtk_vbox_new (FALSE, 6);
	gtk_box_pack_start (GTK_BOX (hbox_content), vbox, TRUE, TRUE, 0);

	// FIXME: review this message, it's not clear since for the user the "modification"
	// could be interpreted as the changes he made in the document. beside "reading" is
	// not accurate (since last load/save)
	primary_text = g_strdup_printf (_("The file %s has been modified since reading it."),
					uri_for_display);
	g_free (uri_for_display);

	primary_markup = g_strdup_printf ("<b>%s</b>", primary_text);
	g_free (primary_text);
	primary_label = gtk_label_new (primary_markup);
	g_free (primary_markup);
	gtk_box_pack_start (GTK_BOX (vbox), primary_label, TRUE, TRUE, 0);
	gtk_label_set_use_markup (GTK_LABEL (primary_label), TRUE);
	gtk_label_set_line_wrap (GTK_LABEL (primary_label), TRUE);
#if GTK_CHECK_VERSION (3, 16, 0)
	gtk_label_set_xalign (GTK_LABEL (primary_label), 0.0);
#else
	gtk_misc_set_alignment (GTK_MISC (primary_label), 0.0, 0.5);
#endif
	gtk_widget_set_can_focus (primary_label, TRUE);
	gtk_label_set_selectable (GTK_LABEL (primary_label), TRUE);

	secondary_text = _("If you save it, all the external changes could be lost. Save it anyway?");
	secondary_markup = g_strdup_printf ("<small>%s</small>",
					    secondary_text);
	secondary_label = gtk_label_new (secondary_markup);
	g_free (secondary_markup);
	gtk_box_pack_start (GTK_BOX (vbox), secondary_label, TRUE, TRUE, 0);
	gtk_widget_set_can_focus (secondary_label, TRUE);
	gtk_label_set_use_markup (GTK_LABEL (secondary_label), TRUE);
	gtk_label_set_line_wrap (GTK_LABEL (secondary_label), TRUE);
	gtk_label_set_selectable (GTK_LABEL (secondary_label), TRUE);
#if GTK_CHECK_VERSION (3, 16, 0)
	gtk_label_set_xalign (GTK_LABEL (secondary_label), 0.0);
#else
	gtk_misc_set_alignment (GTK_MISC (secondary_label), 0.0, 0.5);
#endif

	gtk_widget_show_all (hbox_content);
	set_contents (message_area, hbox_content);

	return message_area;
}

GtkWidget *
pluma_no_backup_saving_error_message_area_new (const gchar  *uri,
					       const GError *error)
{
	GtkWidget *message_area;
	GtkWidget *hbox_content;
	GtkWidget *image;
	GtkWidget *vbox;
	gchar *primary_markup;
	gchar *secondary_markup;
	GtkWidget *primary_label;
	GtkWidget *secondary_label;
	gchar *primary_text;
	const gchar *secondary_text;
	gchar *full_formatted_uri;
	gchar *uri_for_display;
	gchar *temp_uri_for_display;

	g_return_val_if_fail (uri != NULL, NULL);
	g_return_val_if_fail (error != NULL, NULL);
	g_return_val_if_fail (((error->domain == PLUMA_DOCUMENT_ERROR &&
			        error->code == PLUMA_DOCUMENT_ERROR_CANT_CREATE_BACKUP) ||
			       (error->domain == G_IO_ERROR &&
			        error->code == G_IO_ERROR_CANT_CREATE_BACKUP)), NULL);

	full_formatted_uri = pluma_utils_uri_for_display (uri);

	/* Truncate the URI so it doesn't get insanely wide. Note that even
	 * though the dialog uses wrapped text, if the URI doesn't contain
	 * white space then the text-wrapping code is too stupid to wrap it.
	 */
	temp_uri_for_display = pluma_utils_str_middle_truncate (full_formatted_uri, 
								MAX_URI_IN_DIALOG_LENGTH);								
	g_free (full_formatted_uri);

	uri_for_display = g_markup_printf_escaped ("<i>%s</i>", temp_uri_for_display);
	g_free (temp_uri_for_display);

	message_area = gtk_info_bar_new ();
	
	info_bar_add_stock_button_with_text (GTK_INFO_BAR (message_area),
					     _("S_ave Anyway"),
					     GTK_STOCK_SAVE,
					     GTK_RESPONSE_YES);
	gtk_info_bar_add_button (GTK_INFO_BAR (message_area),
				 _("D_on't Save"),
				 GTK_RESPONSE_CANCEL);
	gtk_info_bar_set_message_type (GTK_INFO_BAR (message_area),
				       GTK_MESSAGE_WARNING);

	hbox_content = gtk_hbox_new (FALSE, 8);

	image = gtk_image_new_from_stock ("gtk-dialog-warning", GTK_ICON_SIZE_DIALOG);
	gtk_box_pack_start (GTK_BOX (hbox_content), image, FALSE, FALSE, 0);
#if GTK_CHECK_VERSION (3, 0, 0)
	gtk_widget_set_halign (image, GTK_ALIGN_CENTER);
	gtk_widget_set_valign (image, GTK_ALIGN_START);
#else
	gtk_misc_set_alignment (GTK_MISC (image), 0.5, 0.0);
#endif

	vbox = gtk_vbox_new (FALSE, 6);
	gtk_box_pack_start (GTK_BOX (hbox_content), vbox, TRUE, TRUE, 0);

	// FIXME: review this messages

	if (pluma_prefs_manager_get_create_backup_copy ())
		primary_text = g_strdup_printf (_("Could not create a backup file while saving %s"),
						uri_for_display);
	else
		primary_text = g_strdup_printf (_("Could not create a temporary backup file while saving %s"),
						uri_for_display);

	g_free (uri_for_display);

	primary_markup = g_strdup_printf ("<b>%s</b>", primary_text);
	g_free (primary_text);
	primary_label = gtk_label_new (primary_markup);
	g_free (primary_markup);
	gtk_box_pack_start (GTK_BOX (vbox), primary_label, TRUE, TRUE, 0);
	gtk_label_set_use_markup (GTK_LABEL (primary_label), TRUE);
	gtk_label_set_line_wrap (GTK_LABEL (primary_label), TRUE);
#if GTK_CHECK_VERSION (3, 16, 0)
	gtk_label_set_xalign (GTK_LABEL (primary_label), 0.0);
#else
	gtk_misc_set_alignment (GTK_MISC (primary_label), 0.0, 0.5);
#endif
	gtk_widget_set_can_focus (primary_label, TRUE);
	gtk_label_set_selectable (GTK_LABEL (primary_label), TRUE);

	secondary_text = _("pluma could not back up the old copy of the file before saving the new one. "
			   "You can ignore this warning and save the file anyway, but if an error "
			   "occurs while saving, you could lose the old copy of the file. Save anyway?");
	secondary_markup = g_strdup_printf ("<small>%s</small>",
					    secondary_text);
	secondary_label = gtk_label_new (secondary_markup);
	g_free (secondary_markup);
	gtk_box_pack_start (GTK_BOX (vbox), secondary_label, TRUE, TRUE, 0);
	gtk_widget_set_can_focus (secondary_label, TRUE);
	gtk_label_set_use_markup (GTK_LABEL (secondary_label), TRUE);
	gtk_label_set_line_wrap (GTK_LABEL (secondary_label), TRUE);
	gtk_label_set_selectable (GTK_LABEL (secondary_label), TRUE);
#if GTK_CHECK_VERSION (3, 16, 0)
	gtk_label_set_xalign (GTK_LABEL (secondary_label), 0.0);
#else
	gtk_misc_set_alignment (GTK_MISC (secondary_label), 0.0, 0.5);
#endif

	gtk_widget_show_all (hbox_content);
	set_contents (message_area, hbox_content);

	return message_area;
}

GtkWidget *
pluma_unrecoverable_saving_error_message_area_new (const gchar  *uri,
						   const GError *error)
{
	gchar *error_message = NULL;
	gchar *message_details = NULL;
	gchar *full_formatted_uri;
	gchar *scheme_string;
	gchar *scheme_markup;
	gchar *uri_for_display;
	gchar *temp_uri_for_display;
	GtkWidget *message_area;

	g_return_val_if_fail (uri != NULL, NULL);
	g_return_val_if_fail (error != NULL, NULL);
	g_return_val_if_fail ((error->domain == PLUMA_DOCUMENT_ERROR) || 
			      (error->domain == G_IO_ERROR), NULL);

	full_formatted_uri = pluma_utils_uri_for_display (uri);

	/* Truncate the URI so it doesn't get insanely wide. Note that even
	 * though the dialog uses wrapped text, if the URI doesn't contain
	 * white space then the text-wrapping code is too stupid to wrap it.
	 */
	temp_uri_for_display = pluma_utils_str_middle_truncate (full_formatted_uri, 
								MAX_URI_IN_DIALOG_LENGTH);
	g_free (full_formatted_uri);

	uri_for_display = g_markup_printf_escaped ("<i>%s</i>", temp_uri_for_display);
	g_free (temp_uri_for_display);

	if (is_gio_error (error, G_IO_ERROR_NOT_SUPPORTED))
	{
		scheme_string = g_uri_parse_scheme (uri);

		if ((scheme_string != NULL) && g_utf8_validate (scheme_string, -1, NULL))
		{
			scheme_markup = g_markup_printf_escaped ("<i>%s:</i>", scheme_string);

			/* Translators: %s is a URI scheme (like for example http:, ftp:, etc.) */
			message_details = g_strdup_printf (_("pluma cannot handle %s locations in write mode. "
							     "Please check that you typed the "
							     "location correctly and try again."),
							   scheme_markup);
			g_free (scheme_markup);
		}
		else
		{
			message_details = g_strdup (_("pluma cannot handle this location in write mode. "
						      "Please check that you typed the "
						      "location correctly and try again."));
		}

		g_free (scheme_string);
	}
	else if (is_gio_error (error, G_IO_ERROR_INVALID_FILENAME))
	{
		message_details = g_strdup (_("%s is not a valid location. " 
					      "Please check that you typed the "
					      "location correctly and try again."));
	}
	else if (is_gio_error (error, G_IO_ERROR_PERMISSION_DENIED))
	{
		message_details = g_strdup (_("You do not have the permissions necessary to save the file. "
					      "Please check that you typed the "
					      "location correctly and try again."));
	}
	else if (is_gio_error (error, G_IO_ERROR_NO_SPACE))
	{
		message_details = g_strdup (_("There is not enough disk space to save the file. "
					      "Please free some disk space and try again."));
	}
	else if (is_gio_error (error, G_IO_ERROR_READ_ONLY))
	{
		message_details = g_strdup (_("You are trying to save the file on a read-only disk. "
					      "Please check that you typed the location "
					      "correctly and try again."));
	}
	else if (is_gio_error (error, G_IO_ERROR_EXISTS))
	{
		message_details = g_strdup (_("A file with the same name already exists. "
					      "Please use a different name."));
	}
	else if (is_gio_error (error, G_IO_ERROR_FILENAME_TOO_LONG))
	{
		message_details = g_strdup (_("The disk where you are trying to save the file has "
					      "a limitation on length of the file names. "
					      "Please use a shorter name."));
	}
	else if (error->domain == PLUMA_DOCUMENT_ERROR &&
		 error->code == PLUMA_DOCUMENT_ERROR_TOO_BIG)
	{
		message_details = g_strdup (_("The disk where you are trying to save the file has "
					      "a limitation on file sizes. Please try saving "
					      "a smaller file or saving it to a disk that does not "
					      "have this limitation."));
	}
	else
	{
		parse_error (error, 
			     &error_message, 
			     &message_details, 
			     uri, 
			     uri_for_display);
	}

	if (error_message == NULL)
	{
		error_message = g_strdup_printf (_("Could not save the file %s."),
						 uri_for_display);
	}

	message_area = create_io_loading_error_message_area (error_message,
							     message_details,
							     FALSE);

	g_free (uri_for_display);
	g_free (error_message);
	g_free (message_details);

	return message_area;
}

GtkWidget *
pluma_externally_modified_message_area_new (const gchar *uri,
					    gboolean     document_modified)
{
	gchar *full_formatted_uri;
	gchar *uri_for_display;
	gchar *temp_uri_for_display;
	const gchar *primary_text;
	const gchar *secondary_text;
	GtkWidget *message_area;

	g_return_val_if_fail (uri != NULL, NULL);

	full_formatted_uri = pluma_utils_uri_for_display (uri);

	/* Truncate the URI so it doesn't get insanely wide. Note that even
	 * though the dialog uses wrapped text, if the URI doesn't contain
	 * white space then the text-wrapping code is too stupid to wrap it.
	 */
	temp_uri_for_display = pluma_utils_str_middle_truncate (full_formatted_uri, 
								MAX_URI_IN_DIALOG_LENGTH);
	g_free (full_formatted_uri);

	uri_for_display = g_markup_printf_escaped ("<i>%s</i>", temp_uri_for_display);
	g_free (temp_uri_for_display);

	// FIXME: review this message, it's not clear since for the user the "modification"
	// could be interpreted as the changes he made in the document. beside "reading" is
	// not accurate (since last load/save)
	primary_text = g_strdup_printf (_("The file %s changed on disk."),
					uri_for_display);
	g_free (uri_for_display);

	if (document_modified)
		secondary_text = _("Do you want to drop your changes and reload the file?");
	else
		secondary_text = _("Do you want to reload the file?");

	message_area = gtk_info_bar_new ();
	
	info_bar_add_stock_button_with_text (GTK_INFO_BAR (message_area),
					     _("_Reload"),
					     GTK_STOCK_REFRESH,
					     GTK_RESPONSE_OK);
	gtk_info_bar_add_button (GTK_INFO_BAR (message_area),
				 GTK_STOCK_CANCEL,
				 GTK_RESPONSE_CANCEL);
	gtk_info_bar_set_message_type (GTK_INFO_BAR (message_area),
				       GTK_MESSAGE_WARNING);

	set_message_area_text_and_icon (message_area,
					"gtk-dialog-warning",
					primary_text,
					secondary_text);

	return message_area;
}

