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/*
 *  Copyright (C) 2004 Marco Pesenti Gritti
 *
 *  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, 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#include "config.h"

#include <stdlib.h>
#include <string.h>

#include <glib/gstdio.h>
#include <glib/gi18n.h>
#include <gtk/gtk.h>

#include "ev-application.h"
#include "ev-debug.h"
#include "ev-init.h"
#include "ev-file-helpers.h"
#include "ev-stock-icons.h"
#include "ev-metadata.h"

#include "eggsmclient.h"
#include "eggdesktopfile.h"


static gchar   *ev_page_label;
static gchar   *ev_find_string;
static gint     ev_page_index = 0;
static gchar   *ev_named_dest;
static gboolean preview_mode = FALSE;
static gboolean fullscreen_mode = FALSE;
static gboolean presentation_mode = FALSE;
static gboolean unlink_temp_file = FALSE;
static gchar   *print_settings;
static const char **file_arguments = NULL;


static gboolean
option_version_cb (const gchar *option_name,
                   const gchar *value,
                   gpointer     data,
                   GError     **error)
{
  g_print ("%s %s\n", _("MATE Document Viewer"), VERSION);

  exit (0);
  return FALSE;
}

static const GOptionEntry goption_options[] =
{
	{ "page-label", 'p', 0, G_OPTION_ARG_STRING, &ev_page_label, N_("The page label of the document to display."), N_("PAGE")},
	{ "page-index", 'i', 0, G_OPTION_ARG_INT, &ev_page_index, N_("The page number of the document to display."), N_("NUMBER")},
	{ "fullscreen", 'f', 0, G_OPTION_ARG_NONE, &fullscreen_mode, N_("Run atril in fullscreen mode"), NULL },
	{ "named-dest", 'n', 0, G_OPTION_ARG_STRING, &ev_named_dest, N_("Named destination to display."), N_("DEST")},
	{ "presentation", 's', 0, G_OPTION_ARG_NONE, &presentation_mode, N_("Run atril in presentation mode"), NULL },
	{ "preview", 'w', 0, G_OPTION_ARG_NONE, &preview_mode, N_("Run atril as a previewer"), NULL },
	{ "find", 'l', 0, G_OPTION_ARG_STRING, &ev_find_string, N_("The word or phrase to find in the document"), N_("STRING")},
	{ "unlink-tempfile", 'u', G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_NONE, &unlink_temp_file, NULL, NULL },
	{ "print-settings", 't', G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_FILENAME, &print_settings, NULL, NULL },
	{ "version", 0, G_OPTION_FLAG_NO_ARG | G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_CALLBACK, option_version_cb, NULL, NULL },
	{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &file_arguments, NULL, N_("[FILEā€¦]") },
	{ NULL }
};

static gboolean
launch_previewer (void)
{
	GString *cmd_str;
	gchar   *cmd;
	gboolean retval = FALSE;
	GError  *error = NULL;

	/* Rebuild the command line, ignoring options
	 * not supported by the previewer and taking only
	 * the first path given
	 */
	cmd_str = g_string_new ("atril-previewer");

	if (print_settings) {
		gchar *quoted;

		quoted = g_shell_quote (print_settings);
		g_string_append_printf (cmd_str, " --print-settings %s", quoted);
		g_free (quoted);
	}

	if (unlink_temp_file)
		g_string_append (cmd_str, " --unlink-tempfile");

	if (file_arguments) {
		gchar *quoted;

		quoted = g_shell_quote (file_arguments[0]);
		g_string_append_printf (cmd_str, " %s", quoted);
		g_free (quoted);
	}

	cmd = g_string_free (cmd_str, FALSE);

	if (!error) {
		GAppInfo *app;

		app = g_app_info_create_from_commandline (cmd, NULL, 0, &error);

		if (app != NULL) {
			retval = g_app_info_launch (app, NULL, NULL, &error);
			g_object_unref (app);
		}
	}

	if (error) {
		g_warning ("Error launching previewer: %s\n", error->message);
		g_error_free (error);
	}

	g_free (cmd);

	return retval;
}

static gchar *
get_label_from_filename (const gchar *filename)
{
	GFile   *file;
	gchar   *label;
	gboolean exists;

	label = g_strrstr (filename, "#");
	if (!label)
		return NULL;

	/* Filename contains a #, check
	 * whether it's part of the path
	 * or a label
	 */
	file = g_file_new_for_commandline_arg (filename);
	exists = g_file_query_exists (file, NULL);
	g_object_unref (file);

	return exists ? NULL : label;
}

static void
load_files (const char **files)
{
	GdkScreen       *screen = gdk_screen_get_default ();
	EvWindowRunMode  mode = EV_WINDOW_MODE_NORMAL;
	gint             i;
	EvLinkDest      *global_dest = NULL;

	if (!files) {
		if (!ev_application_has_window (EV_APP))
			ev_application_open_window (EV_APP, screen, GDK_CURRENT_TIME);
		return;
	}

	if (ev_page_label)
		global_dest = ev_link_dest_new_page_label (ev_page_label);
	else if (ev_page_index)
		global_dest = ev_link_dest_new_page (MAX (0, ev_page_index - 1));
	else if (ev_named_dest)
		global_dest = ev_link_dest_new_named (ev_named_dest);

	if (fullscreen_mode)
		mode = EV_WINDOW_MODE_FULLSCREEN;
	else if (presentation_mode)
		mode = EV_WINDOW_MODE_PRESENTATION;

	for (i = 0; files[i]; i++) {
		const gchar *filename;
		gchar       *uri;
		gchar       *label;
		GFile       *file;
		EvLinkDest  *dest = NULL;
		const gchar *app_uri;

		filename = files[i];
		label = get_label_from_filename (filename);
		if (label) {
			*label = 0;
			label++;
			dest = ev_link_dest_new_page_label (label);
		} else if (global_dest) {
			dest = g_object_ref (global_dest);
		}

		file = g_file_new_for_commandline_arg (filename);
		uri = g_file_get_uri (file);
		g_object_unref (file);

		app_uri = ev_application_get_uri (EV_APP);
		if (app_uri && strcmp (app_uri, uri) == 0) {
			g_free (uri);
			continue;
		}



		ev_application_open_uri_at_dest (EV_APP, uri, screen, dest,
						 mode, ev_find_string,
						 GDK_CURRENT_TIME);

		if (dest)
			g_object_unref (dest);
		g_free (uri);
        }
}

int
main (int argc, char *argv[])
{
	EvApplication  *application;
	GOptionContext *context;
	GError         *error = NULL;
	int             status;

#ifdef ENABLE_NLS
	/* Initialize the i18n stuff */
	bindtextdomain (GETTEXT_PACKAGE, ev_get_locale_dir());
	bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
	textdomain (GETTEXT_PACKAGE);
#endif

	gdk_set_allowed_backends ("x11");

	context = g_option_context_new (N_("MATE Document Viewer"));
	g_option_context_set_translation_domain(context, GETTEXT_PACKAGE);
	g_option_context_add_main_entries (context, goption_options, GETTEXT_PACKAGE);
	g_option_context_add_group (context, egg_sm_client_get_option_group ());
	g_option_context_add_group (context, gtk_get_option_group (TRUE));

	if (!g_option_context_parse (context, &argc, &argv, &error)) {
		g_printerr ("Cannot parse arguments: %s\n", error->message);
		g_error_free (error);
		g_option_context_free (context);

		return 1;
	}
	g_option_context_free (context);

	if (preview_mode) {
		gboolean retval;

		retval = launch_previewer ();

		return retval ? 0 : 1;
	}

        if (!ev_init ())
                return 1;

	ev_stock_icons_init ();

	egg_set_desktop_file (MATEDATADIR "/applications/atril.desktop");

	application = ev_application_new ();
	if (!g_application_register (G_APPLICATION (application), NULL, &error)) {
	        g_printerr ("Failed to register: %s\n", error->message);
	        g_error_free (error);
	        status = 1;
	        goto done;
	}

	ev_application_load_session (application);
	load_files (file_arguments);

	/* Change directory so we don't prevent unmounting in case the initial cwd
	 * is on an external device (see bug #575436)
	 */
	g_chdir (g_get_home_dir ());

	status = g_application_run (G_APPLICATION (application), 0, NULL);

    done:
	ev_shutdown ();
	ev_stock_icons_shutdown ();

	g_object_unref (application);
	return status;
}