/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */

/*
 *  nautilus-mime-application-chooser.c: an mime-application chooser
 *
 *  Copyright (C) 2004 Novell, Inc.
 *  Copyright (C) 2007, 2010 Red Hat, Inc.
 *
 *  The Gnome Library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public License as
 *  published by the Free Software Foundation; either version 2 of the
 *  License, or (at your option) any later version.
 *
 *  The Gnome Library is distributed in the hope that it will be useful,
 *  but APPLICATIONOUT ANY WARRANTY; applicationout even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public
 *  License along application the Gnome Library; see the file COPYING.LIB.  If not,
 *  see <http://www.gnu.org/licenses/>.
 *
 *  Authors: Dave Camp <dave@novell.com>
 *           Alexander Larsson <alexl@redhat.com>
 *           Cosimo Cecchi <ccecchi@redhat.com>
 */

#include <config.h>
#include "nautilus-mime-application-chooser.h"

#include "nautilus-file.h"
#include "nautilus-signaller.h"
#include <eel/eel-stock-dialogs.h>

#include <string.h>
#include <glib/gi18n-lib.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gtk/gtk.h>
#include <gio/gio.h>

struct _NautilusMimeApplicationChooserDetails {
	GList *files;

	char *content_type;

	GtkWidget *label;
	GtkWidget *entry;
	GtkWidget *set_as_default_button;
	GtkWidget *open_with_widget;
	GtkWidget *add_button;
};

enum {
	PROP_CONTENT_TYPE = 1,
	PROP_FILES,
	NUM_PROPERTIES
};

static GParamSpec *properties[NUM_PROPERTIES] = { NULL, };

G_DEFINE_TYPE (NautilusMimeApplicationChooser, nautilus_mime_application_chooser, GTK_TYPE_BOX);

static void
add_clicked_cb (GtkButton *button,
		gpointer user_data)
{
	NautilusMimeApplicationChooser *chooser = user_data;
	GAppInfo *info;
	gchar *message;
	GError *error = NULL;

	info = gtk_app_chooser_get_app_info (GTK_APP_CHOOSER (chooser->details->open_with_widget));

	if (info == NULL)
		return;

	g_app_info_set_as_last_used_for_type (info, chooser->details->content_type, &error);

	if (error != NULL) {
		message = g_strdup_printf (_("Error while adding “%s”: %s"),
					   g_app_info_get_display_name (info), error->message);
		eel_show_error_dialog (_("Could not add application"),
				       message,
				       GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (chooser))));
		g_error_free (error);
		g_free (message);
	} else {		
		gtk_app_chooser_refresh (GTK_APP_CHOOSER (chooser->details->open_with_widget));
		g_signal_emit_by_name (nautilus_signaller_get_current (), "mime-data-changed");
	}

	g_object_unref (info);
}

static void
remove_clicked_cb (GtkMenuItem *item, 
		   gpointer user_data)
{
	NautilusMimeApplicationChooser *chooser = user_data;
	GError *error;
	GAppInfo *info;

	info = gtk_app_chooser_get_app_info (GTK_APP_CHOOSER (chooser->details->open_with_widget));

	if (info) {
		error = NULL;
		if (!g_app_info_remove_supports_type (info,
						      chooser->details->content_type,
						      &error)) {
			eel_show_error_dialog (_("Could not forget association"),
					       error->message,
					       GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (chooser))));
			g_error_free (error);
			
		}

		gtk_app_chooser_refresh (GTK_APP_CHOOSER (chooser->details->open_with_widget));
		g_object_unref (info);
	}

	g_signal_emit_by_name (nautilus_signaller_get_current (), "mime-data-changed");
}

static void
populate_popup_cb (GtkAppChooserWidget *widget,
		   GtkMenu *menu,
		   GAppInfo *app,
		   gpointer user_data)
{
	GtkWidget *item;
	NautilusMimeApplicationChooser *chooser = user_data;

	if (g_app_info_can_remove_supports_type (app)) {
		item = gtk_menu_item_new_with_label (_("Forget association"));
		gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
		gtk_widget_show (item);
		
		g_signal_connect (item, "activate",
				  G_CALLBACK (remove_clicked_cb), chooser);
	}
}

static void
reset_clicked_cb (GtkButton *button,
                  gpointer   user_data)
{
	NautilusMimeApplicationChooser *chooser;
	
	chooser = NAUTILUS_MIME_APPLICATION_CHOOSER (user_data);

	g_app_info_reset_type_associations (chooser->details->content_type);
	gtk_app_chooser_refresh (GTK_APP_CHOOSER (chooser->details->open_with_widget));

	g_signal_emit_by_name (nautilus_signaller_get_current (), "mime-data-changed");
}

static void
set_as_default_clicked_cb (GtkButton *button,
			   gpointer user_data)
{
	NautilusMimeApplicationChooser *chooser = user_data;
	GAppInfo *info;
	GError *error = NULL;
	gchar *message = NULL;

	info = gtk_app_chooser_get_app_info (GTK_APP_CHOOSER (chooser->details->open_with_widget));

	g_app_info_set_as_default_for_type (info, chooser->details->content_type,
					    &error);

	if (error != NULL) {
		message = g_strdup_printf (_("Error while setting “%s” as default application: %s"),
					   g_app_info_get_display_name (info), error->message);
		eel_show_error_dialog (_("Could not set as default"),
				       message,
				       GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (chooser))));
	}

	g_object_unref (info);

	gtk_app_chooser_refresh (GTK_APP_CHOOSER (chooser->details->open_with_widget));
	g_signal_emit_by_name (nautilus_signaller_get_current (), "mime-data-changed");
}

static gint
app_compare (gconstpointer a,
	     gconstpointer b)
{
	return !g_app_info_equal (G_APP_INFO (a), G_APP_INFO (b));
}

static gboolean
app_info_can_add (GAppInfo *info,
		  const gchar *content_type)
{
	GList *recommended, *fallback;
	gboolean retval = FALSE;

	recommended = g_app_info_get_recommended_for_type (content_type);
	fallback = g_app_info_get_fallback_for_type (content_type);

	if (g_list_find_custom (recommended, info, app_compare)) {
		goto out;
	}

	if (g_list_find_custom (fallback, info, app_compare)) {
		goto out;
	}

	retval = TRUE;

 out:
	g_list_free_full (recommended, g_object_unref);
	g_list_free_full (fallback, g_object_unref);

	return retval;
}

static void
application_selected_cb (GtkAppChooserWidget *widget,
			 GAppInfo *info,
			 gpointer user_data)
{
	NautilusMimeApplicationChooser *chooser = user_data;
	GAppInfo *default_app;

	default_app = g_app_info_get_default_for_type (chooser->details->content_type, FALSE);
	if (default_app != NULL) {
		gtk_widget_set_sensitive (chooser->details->set_as_default_button,
					  !g_app_info_equal (info, default_app));
		g_object_unref (default_app);
	}
	gtk_widget_set_sensitive (chooser->details->add_button,
				  app_info_can_add (info, chooser->details->content_type));
}

static void
nautilus_mime_application_chooser_apply_labels (NautilusMimeApplicationChooser *chooser)
{
	gchar *label, *extension = NULL, *description = NULL;
	gint num_files;
	NautilusFile *file;

	num_files = g_list_length (chooser->details->files);
	file = chooser->details->files->data;

	/* here we assume all files are of the same content type */
	if (g_content_type_is_unknown (chooser->details->content_type)) {
		extension = nautilus_file_get_extension (file);

		/* Translators: the %s here is a file extension */
		description = g_strdup_printf (_("%s document"), extension);
	} else {
		description = g_content_type_get_description (chooser->details->content_type);
	}

	if (num_files > 1) {
		/* Translators; %s here is a mime-type description */
		label = g_strdup_printf (_("Open all files of type “%s” with"),
					 description);
	} else {
		gchar *display_name;
		display_name = nautilus_file_get_display_name (file);

		/* Translators: first %s is filename, second %s is mime-type description */
		label = g_strdup_printf (_("Select an application to open “%s” and other files of type “%s”"),
					 display_name, description);

		g_free (display_name);
	}

	gtk_label_set_markup (GTK_LABEL (chooser->details->label), label);

	g_free (label);
	g_free (extension);
	g_free (description);
}

static void
nautilus_mime_application_chooser_build_ui (NautilusMimeApplicationChooser *chooser)
{
	GtkWidget *box, *button;
	GAppInfo *info;

	gtk_container_set_border_width (GTK_CONTAINER (chooser), 8);
	gtk_box_set_spacing (GTK_BOX (chooser), 0);
	gtk_box_set_homogeneous (GTK_BOX (chooser), FALSE);

	chooser->details->label = gtk_label_new ("");
        gtk_label_set_xalign (GTK_LABEL (chooser->details->label), 0);
	gtk_label_set_line_wrap (GTK_LABEL (chooser->details->label), TRUE);
	gtk_label_set_line_wrap_mode (GTK_LABEL (chooser->details->label),
				      PANGO_WRAP_WORD_CHAR);
	gtk_label_set_max_width_chars (GTK_LABEL (chooser->details->label), 60);
	gtk_box_pack_start (GTK_BOX (chooser), chooser->details->label, 
			    FALSE, FALSE, 0);

	gtk_widget_show (chooser->details->label);

	chooser->details->open_with_widget = gtk_app_chooser_widget_new (chooser->details->content_type);
	gtk_app_chooser_widget_set_show_default (GTK_APP_CHOOSER_WIDGET (chooser->details->open_with_widget),
						 TRUE);
	gtk_app_chooser_widget_set_show_fallback (GTK_APP_CHOOSER_WIDGET (chooser->details->open_with_widget),
						  TRUE);
	gtk_app_chooser_widget_set_show_other (GTK_APP_CHOOSER_WIDGET (chooser->details->open_with_widget),
					       TRUE);
	gtk_box_pack_start (GTK_BOX (chooser), chooser->details->open_with_widget,
			    TRUE, TRUE, 6);
	gtk_widget_show (chooser->details->open_with_widget);

	box = gtk_button_box_new (GTK_ORIENTATION_HORIZONTAL);
	gtk_box_set_spacing (GTK_BOX (box), 6);
	gtk_button_box_set_layout (GTK_BUTTON_BOX (box), GTK_BUTTONBOX_END);
	gtk_box_pack_start (GTK_BOX (chooser), box, FALSE, FALSE, 6);
	gtk_widget_show (box);

	button = gtk_button_new_with_label (_("Reset"));
	g_signal_connect (button, "clicked", 
			  G_CALLBACK (reset_clicked_cb),
			  chooser);
	gtk_widget_show (button);
	gtk_box_pack_start (GTK_BOX (box), button, FALSE, FALSE, 0);
	gtk_button_box_set_child_secondary (GTK_BUTTON_BOX (box), button, TRUE);

	button = gtk_button_new_with_mnemonic (_("_Add"));
	g_signal_connect (button, "clicked", 
			  G_CALLBACK (add_clicked_cb),
			  chooser);
	gtk_widget_show (button);
	gtk_box_pack_start (GTK_BOX (box), button, FALSE, FALSE, 0);
	chooser->details->add_button = button;

	button = gtk_button_new_with_label (_("Set as default"));
	g_signal_connect (button, "clicked",
			  G_CALLBACK (set_as_default_clicked_cb),
			  chooser);
	gtk_widget_show (button);
	gtk_box_pack_start (GTK_BOX (box), button, FALSE, FALSE, 0);

	chooser->details->set_as_default_button = button;

	/* initialize sensitivity */
	info = gtk_app_chooser_get_app_info (GTK_APP_CHOOSER (chooser->details->open_with_widget));
	if (info != NULL) {
		application_selected_cb (GTK_APP_CHOOSER_WIDGET (chooser->details->open_with_widget),
					 info, chooser);
		g_object_unref (info);
	}

	g_signal_connect (chooser->details->open_with_widget,
			  "application-selected",
			  G_CALLBACK (application_selected_cb),
			  chooser);
	g_signal_connect (chooser->details->open_with_widget,
			  "populate-popup",
			  G_CALLBACK (populate_popup_cb),
			  chooser);
}

static void
nautilus_mime_application_chooser_init (NautilusMimeApplicationChooser *chooser)
{
	chooser->details = G_TYPE_INSTANCE_GET_PRIVATE (chooser, NAUTILUS_TYPE_MIME_APPLICATION_CHOOSER,
							NautilusMimeApplicationChooserDetails);

	gtk_orientable_set_orientation (GTK_ORIENTABLE (chooser),
					GTK_ORIENTATION_VERTICAL);
}

static void
nautilus_mime_application_chooser_constructed (GObject *object)
{
	NautilusMimeApplicationChooser *chooser = NAUTILUS_MIME_APPLICATION_CHOOSER (object);

	if (G_OBJECT_CLASS (nautilus_mime_application_chooser_parent_class)->constructed != NULL)
		G_OBJECT_CLASS (nautilus_mime_application_chooser_parent_class)->constructed (object);

	nautilus_mime_application_chooser_build_ui (chooser);
	nautilus_mime_application_chooser_apply_labels (chooser);
}

static void
nautilus_mime_application_chooser_finalize (GObject *object)
{
	NautilusMimeApplicationChooser *chooser;

	chooser = NAUTILUS_MIME_APPLICATION_CHOOSER (object);

	g_free (chooser->details->content_type);
	nautilus_file_list_free (chooser->details->files);

	G_OBJECT_CLASS (nautilus_mime_application_chooser_parent_class)->finalize (object);
}

static void
nautilus_mime_application_chooser_get_property (GObject *object,
						guint property_id,
						GValue *value,
						GParamSpec *pspec)
{
	NautilusMimeApplicationChooser *chooser = NAUTILUS_MIME_APPLICATION_CHOOSER (object);

	switch (property_id) {
	case PROP_CONTENT_TYPE:
		g_value_set_string (value, chooser->details->content_type);
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
		break;
	}
}

static void
nautilus_mime_application_chooser_set_property (GObject *object,
						guint property_id,
						const GValue *value,
						GParamSpec *pspec)
{
	NautilusMimeApplicationChooser *chooser = NAUTILUS_MIME_APPLICATION_CHOOSER (object);

	switch (property_id) {
	case PROP_CONTENT_TYPE:
		chooser->details->content_type = g_value_dup_string (value);
		break;
	case PROP_FILES:
		chooser->details->files = nautilus_file_list_copy (g_value_get_pointer (value));
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
		break;
	}
}

static void
nautilus_mime_application_chooser_class_init (NautilusMimeApplicationChooserClass *class)
{
	GObjectClass *gobject_class;

	gobject_class = G_OBJECT_CLASS (class);
	gobject_class->set_property = nautilus_mime_application_chooser_set_property;
	gobject_class->get_property = nautilus_mime_application_chooser_get_property;
	gobject_class->finalize = nautilus_mime_application_chooser_finalize;
	gobject_class->constructed = nautilus_mime_application_chooser_constructed;

	properties[PROP_CONTENT_TYPE] = g_param_spec_string ("content-type",
							     "Content type",
							     "Content type for this widget",
							     NULL,
							     G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
							     G_PARAM_STATIC_STRINGS);
	properties[PROP_FILES] = g_param_spec_pointer ("files",
						       "Files",
						       "Files for this widget",
						       G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY |
						       G_PARAM_STATIC_STRINGS);

	g_object_class_install_properties (gobject_class, NUM_PROPERTIES, properties);

	g_type_class_add_private (class, sizeof (NautilusMimeApplicationChooserDetails));
}

GtkWidget *
nautilus_mime_application_chooser_new (GList *files,
				       const char *mime_type)
{
	GtkWidget *chooser;

	chooser = g_object_new (NAUTILUS_TYPE_MIME_APPLICATION_CHOOSER,
				"files", files,
				"content-type", mime_type,
				NULL);

	return chooser;
}
