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/*
 *  Copyright © 2000-2002 Marco Pesenti Gritti
 *  Copyright © 2006, 2008 Christian Persch
 *
 *  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 "ephy-shell.h"
#include "ephy-file-helpers.h"
#include "ephy-object-helpers.h"
#include "ephy-state.h"
#include "ephy-debug.h"
#include "ephy-stock-icons.h"
#include "eel-gconf-extensions.h"
#include "ephy-dbus-client-bindings.h"
#include "ephy-activation.h"
#include "ephy-session.h"
#include "ephy-shell.h"
#include "ephy-prefs.h"
#include "ephy-profile-migration.h"
#include "ephy-debug.h"
#include "eggsmclient.h"

#include <libxml/xmlversion.h>

#include <glib/gi18n.h>

#include <gdk/gdkx.h>
#include <gtk/gtk.h>

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

#ifdef ENABLE_INTROSPECTION
#include <girepository.h>
#endif

#ifdef HAVE_LIBNOTIFY
#include <libnotify/notify.h>
#endif

static GQuark startup_error_quark = 0;
#define STARTUP_ERROR_QUARK (startup_error_quark)

static gboolean open_in_new_tab = FALSE;
static gboolean open_in_new_window = FALSE;
static gboolean open_as_bookmarks_editor = FALSE;
/*static gboolean reload_plugins = FALSE;*/

static char *session_filename = NULL;
static char *bookmark_url = NULL;
static char *bookmarks_file = NULL;
static char **arguments = NULL;

/* Only set from options in debug builds */
static gboolean private_instance = FALSE;
static gboolean keep_temp_directory = FALSE;
static char *profile_directory = NULL;

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

  exit (EXIT_SUCCESS);
 return FALSE;
}
 
static const GOptionEntry option_entries[] =
{
    { "new-tab", 'n', 0, G_OPTION_ARG_NONE, &open_in_new_tab,
      N_("Open a new tab in an existing browser window"), NULL },
    { "new-window", 0, 0, G_OPTION_ARG_NONE, &open_in_new_window,
      N_("Open a new browser window"), NULL },
    { "bookmarks-editor", 'b', 0, G_OPTION_ARG_NONE, &open_as_bookmarks_editor,
      N_("Launch the bookmarks editor"), NULL },
    { "import-bookmarks", '\0', 0, G_OPTION_ARG_FILENAME, &bookmarks_file,
      N_("Import bookmarks from the given file"), N_("FILE") },
    { "load-session", 'l', 0, G_OPTION_ARG_FILENAME, &session_filename,
      N_("Load the given session file"), N_("FILE") },
    { "add-bookmark", 't', 0, G_OPTION_ARG_STRING, &bookmark_url,
      N_("Add a bookmark"), N_("URL") },
    { "private-instance", 'p', 0, G_OPTION_ARG_NONE, &private_instance,
      N_("Start a private instance"), NULL },
    { "profile", 0, 0, G_OPTION_ARG_STRING, &profile_directory,
      N_("Profile directory to use in the private instance"), N_("DIR") },
    { G_OPTION_REMAINING, '\0', 0, G_OPTION_ARG_FILENAME_ARRAY, &arguments,
      "", N_("URL …")},
    { "version", 0, G_OPTION_FLAG_NO_ARG | G_OPTION_FLAG_HIDDEN, 
      G_OPTION_ARG_CALLBACK, option_version_cb, NULL, NULL },
    { NULL }
};

#ifdef GNOME_ENABLE_DEBUG
static GOptionEntry debug_option_entries[] =
{
    { "keep-tempdir", 0, 0, G_OPTION_ARG_NONE, &keep_temp_directory,
      "Don't delete the temporary directory on exit", NULL },
    { NULL }
};
#endif /* GNOME_ENABLE_DEBUG */
 
/* adapted from gtk+/gdk/x11/gdkdisplay-x11.c */
static guint32
get_startup_id (void)
{
    const char *startup_id, *time_str;
    guint32 retval = 0;

    startup_id = g_getenv ("DESKTOP_STARTUP_ID");
    if (startup_id == NULL) return 0;

    /* Find the launch time from the startup_id, if it's there.  Newer spec
    * states that the startup_id is of the form <unique>_TIME<timestamp>
    */
    time_str = g_strrstr (startup_id, "_TIME");
    if (time_str != NULL)
    {
        gulong value;
        gchar *end;
        errno = 0;
    
        /* Skip past the "_TIME" part */
        time_str += 5;
    
        value = strtoul (time_str, &end, 0);
        if (end != time_str && errno == 0)
        {
            retval = (guint32) value;
        }
    }

    return retval;
}

/* Copied from libnautilus/nautilus-program-choosing.c; Needed in case
 * we have no DESKTOP_STARTUP_ID (with its accompanying timestamp).
 */
static Time
slowly_and_stupidly_obtain_timestamp (Display *xdisplay)
{
    Window xwindow;
    XEvent event;
    
    {
        XSetWindowAttributes attrs;
        Atom atom_name;
        Atom atom_type;
        char* name;
        
        attrs.override_redirect = True;
        attrs.event_mask = PropertyChangeMask | StructureNotifyMask;
        
        xwindow =
            XCreateWindow (xdisplay,
                       RootWindow (xdisplay, 0),
                       -100, -100, 1, 1,
                       0,
                       CopyFromParent,
                       CopyFromParent,
                       CopyFromParent,
                       CWOverrideRedirect | CWEventMask,
                       &attrs);
        
        atom_name = XInternAtom (xdisplay, "WM_NAME", TRUE);
        g_assert (atom_name != None);
        atom_type = XInternAtom (xdisplay, "STRING", TRUE);
        g_assert (atom_type != None);
        
        name = "Fake Window";
        XChangeProperty (xdisplay, 
                 xwindow, atom_name,
                 atom_type,
                 8, PropModeReplace, (unsigned char *)name, strlen (name));
    }
    
    XWindowEvent (xdisplay,
              xwindow,
              PropertyChangeMask,
              &event);
    
    XDestroyWindow(xdisplay, xwindow);
    
    return event.xproperty.time;
}

static void
unref_proxy_reply_cb (DBusGProxy *proxy,
              GError *error,
              gpointer user_data)
{
    if (error != NULL)
    {
        g_warning ("An error occurred while calling remote method: %s", error->message);
        g_error_free (error);
    }

    g_object_unref (proxy);

    if (gtk_main_level ())
    {
        gtk_main_quit ();
    }
}

static gboolean
open_urls (DBusGProxy *proxy,
       guint32 user_time,
       GError **error)
{
    static const char *empty_arguments[] = { "", NULL };
    GString *options;
    char **uris;

    options = g_string_sized_new (64);

    if (open_in_new_window)
    {
        g_string_append (options, "new-window,");
    }
    if (open_in_new_tab)
    {
        g_string_append (options, "new-tab,");
    }

    if (arguments == NULL)
    {
        uris = (char **) empty_arguments;
    }
    else
    {
        uris = (char **) arguments;
    }

    org_gnome_Epiphany_load_ur_ilist_async
        (proxy, (const char **) uris, options->str, user_time,
         unref_proxy_reply_cb, NULL);
    
    if (arguments != NULL)
    {
        g_strfreev (arguments);
        arguments = NULL;
    }

    g_string_free (options, TRUE);

    return TRUE;
}

static gboolean
call_dbus_proxy (DBusGProxy *proxy,
         guint32 user_time,
         GError **error)
{
    EphyShell *shell;
    gboolean retval = TRUE;

    shell = ephy_shell_get_default ();

    if (open_as_bookmarks_editor)
    {
        org_gnome_Epiphany_open_bookmarks_editor_async
            (proxy, user_time,
             unref_proxy_reply_cb, shell);
    }
    else if (session_filename != NULL)
    {
        org_gnome_Epiphany_load_session_async
            (proxy, session_filename, user_time,
             unref_proxy_reply_cb, shell);

        g_free (session_filename);
        session_filename = NULL;
    }
    else
    {
        retval = open_urls (proxy, user_time, error);
    }

    /* FIXME why? */
    dbus_g_connection_flush (ephy_dbus_get_bus (ephy_dbus_get_default (), EPHY_DBUS_SESSION));

    return retval;
}

static void
queue_commands (guint32 user_time)
{
    EphyShell *shell;
    EphySession *session;

    shell = ephy_shell_get_default ();
    g_assert (shell != NULL);

    session = EPHY_SESSION (ephy_shell_get_session (shell));
    g_assert (session != NULL);

    /* We only get here when starting a new instance, so we 
     * first need to autoresume!
     */
    ephy_session_queue_command (session,
                    EPHY_SESSION_CMD_RESUME_SESSION,
                    NULL, NULL, user_time, TRUE);

    if (open_as_bookmarks_editor)
    {
        ephy_session_queue_command (session,
                        EPHY_SESSION_CMD_OPEN_BOOKMARKS_EDITOR,
                        NULL, NULL, user_time, FALSE);
    }
    else if (session_filename != NULL)
    {
        ephy_session_queue_command (session,
                        EPHY_SESSION_CMD_LOAD_SESSION,
                        session_filename, NULL,
                        user_time, FALSE);

        g_free (session_filename);
        session_filename = NULL;
    }
    /* Don't queue any window openings if no extra arguments given,
     * since session autoresume will open one for us.
     */
    else if (arguments != NULL)
    {
        GString *options;

        options = g_string_sized_new (64);

        if (open_in_new_window)
        {
            g_string_append (options, "new-window,");
        }
        if (open_in_new_tab)
        {
            g_string_append (options, "new-tab,external,");
        }

        ephy_session_queue_command (session,
                        EPHY_SESSION_CMD_OPEN_URIS,
                        options->str,
                        arguments,
                        user_time, FALSE);

        g_strfreev (arguments);
        arguments = NULL;
    }
}

static void
show_error_message (GError **error)
{
    GtkWidget *dialog;

    /* FIXME better texts!!! */
    dialog = gtk_message_dialog_new (NULL,
                     GTK_DIALOG_MODAL,
                     GTK_MESSAGE_ERROR,
                     GTK_BUTTONS_CLOSE,
                     _("Could not start GNOME Web Browser"));
    gtk_message_dialog_format_secondary_text
        (GTK_MESSAGE_DIALOG (dialog),
         _("Startup failed because of the following error:\n%s"),
         (*error)->message);

    g_clear_error (error);

    gtk_dialog_run (GTK_DIALOG (dialog));
}

static gchar *
get_accels_filename (void)
{
        const char *home;

        home = g_get_home_dir();
        if (!home)
                return NULL;
        return g_build_filename (home, GNOME_DOT_GNOME, "accels", PACKAGE, NULL);
}

static void
load_accels (void)
{
        char *filename;

        filename = get_accels_filename ();
        if (!filename)
                return;

        gtk_accel_map_load (filename);
        g_free (filename);
}

static void
save_accels (void)
{
        char *filename;

        filename = get_accels_filename ();
        if (!filename)
                return;

        gtk_accel_map_save (filename);
        g_free (filename);
}

static void
shell_quit_cb (EphyShell *shell, gpointer data)
{
    gtk_main_quit ();
}

int
main (int argc,
      char *argv[])
{
    GOptionContext *option_context;
    GOptionGroup *option_group;
    DBusGProxy *proxy;
    GError *error = NULL;
    guint32 user_time;

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

    /* Threads have to be initialised before calling ANY glib function */
    g_thread_init (NULL);
    dbus_g_thread_init ();

    /* check libxml2 API version epiphany was compiled with against the
     * version we're running with.
     */
    LIBXML_TEST_VERSION;

    /* sets name to help matching with the .desktop file */
    g_set_prgname ("epiphany");

    /* If we're given -remote arguments, translate them */
    if (argc >= 2 &&
        strcmp (argv[1], "-remote") == 0)
    {
        const char *opening, *closing;
        char *command, *argument;
        char **arguments;

        if (argc != 3)
        {
            g_print ("-remote allows exactly one argument\n");
            exit (1);
        }

        opening = strchr (argv[2], '(');
        closing = strchr (argv[2], ')');

        if (opening == NULL ||
            closing == NULL ||
            opening == argv[2] ||
            opening + 1 >= closing)
        {
            g_print ("Invalid argument for -remote\n");
            exit (1);
        }

        command = g_strstrip (g_strndup (argv[2], opening - argv[2]));

        /* See http://lxr.mozilla.org/seamonkey/source/xpfe/components/xremote/src/XRemoteService.cpp
         * for the commands that mozilla supports; we'll just support openURL here.
         */
        if (g_ascii_strcasecmp (command, "openURL") != 0)
        {
            g_print ("-remote command \"%s\" not supported\n", command);
            g_free (command);
            exit (1);
        }

        g_free (command);

        argument = g_strstrip (g_strndup (opening + 1, closing - opening - 1));
        arguments = g_strsplit (argument, ",", -1);
        g_free (argument);
        if (arguments == NULL)
        {
            g_print ("Invalid argument for -remote\n");

            exit (1);
        }

        /* replace arguments */
        argv[1] = g_strstrip (g_strdup (arguments[0]));
        argc = 2;

        g_strfreev (arguments);
    }

    /* Initialise our debug helpers */
    ephy_debug_init ();

    /* get this early, since gdk will unset the env var */
    user_time = get_startup_id ();

    option_context = g_option_context_new ("");
    option_group = g_option_group_new ("epiphany",
                       N_("GNOME Web Browser"),
                       N_("GNOME Web Browser options"),
                       NULL, NULL);

    g_option_group_set_translation_domain (option_group, GETTEXT_PACKAGE);

    g_option_group_add_entries (option_group, option_entries);

    g_option_context_set_main_group (option_context, option_group);

#ifdef ENABLE_INTROSPECTION
    g_option_context_add_group (option_context, g_irepository_get_option_group ());
#endif

        g_option_context_add_group (option_context, gtk_get_option_group (TRUE));
        g_option_context_add_group (option_context, egg_sm_client_get_option_group ());

#ifdef GNOME_ENABLE_DEBUG
    option_group = g_option_group_new ("debug",
                       "Epiphany debug options",
                       "Epiphany debug options",
                       NULL, NULL);
    g_option_group_add_entries (option_group, debug_option_entries);
    g_option_context_add_group (option_context, option_group);
#endif /* GNOME_ENABLE_DEBUG */

        if (!g_option_context_parse (option_context, &argc, &argv, &error))
        {
                g_print ("Failed to parse arguments: %s\n", error->message);
                g_error_free (error);
                g_option_context_free (option_context);
                exit (1);
        }
        
        g_option_context_free (option_context);

    /* Some argument sanity checks*/
    if (arguments != NULL && (session_filename != NULL || open_as_bookmarks_editor))
    {
        g_print ("Cannot use --bookmarks-editor or --load-session with URL arguments\n");
        exit (1);
    }

    if (profile_directory != NULL && private_instance == FALSE)
    {
        g_print ("--profile can only be used in combination with --private-instance\n");
        exit (1);
    }

    if (arguments != NULL &&
        eel_gconf_get_boolean (CONF_LOCKDOWN_DISABLE_ARBITRARY_URL))
    {
        g_print ("URL loading is locked down\n");
        exit (1);
    }

    /* Make URIs from arguments, to support filename args */
    if (arguments != NULL)
    {
        guint i;

        for (i = 0; arguments[i] != NULL; ++i)
        {
            char *uri, *path;
#ifdef PATH_MAX
            char rpath[PATH_MAX];
#else
            char *rpath = NULL;
#endif

            path = realpath (arguments[i], rpath);
            if (path != NULL)
            {
                uri = g_locale_to_utf8 (path, -1, 
                            NULL, NULL, &error);
#ifndef PATH_MAX
                free (path);
#endif
            }
            else
            {
                uri = g_locale_to_utf8 (arguments[i], -1, 
                            NULL, NULL, &error);
            }

            if (uri != NULL)
            {
                g_free (arguments[i]);

                /* If it's a file, use g_file_new_for_commandline_arg,
                 * so we get the right escaping.
                 */
                if (path != NULL)
                {
                    GFile *file;
                    file = g_file_new_for_commandline_arg (uri);
                    arguments[i] = g_file_get_uri (file);
                    g_object_unref (file);
                    g_free (uri);
                }
                else
                {
                    arguments[i] = uri;
                }
            }
            else
            {
                g_print ("Could not convert '%s' to UTF-8: %s!\n",
                     arguments[i], error->message);
                g_error_free (error);
                exit (1);
            }
        }
    }

    /* Get a timestamp manually if need be */
    if (user_time == 0)
    {
        user_time = slowly_and_stupidly_obtain_timestamp (gdk_display);
    }

    /* sets the name to appear in the window list applet when grouping windows */
    g_set_application_name (_("Web Browser"));

    /* Set default window icon */
    gtk_window_set_default_icon_name (EPHY_STOCK_EPHY);

    startup_error_quark = g_quark_from_static_string ("epiphany-startup-error");

    if (!_ephy_dbus_startup (!private_instance, &error))
    {
        _ephy_dbus_release ();

        show_error_message (&error);

        exit (1);
    }

    /* If we're remoting, no need to start up any further services,
     * just forward the call.
     */
    if (!private_instance &&
        !_ephy_dbus_is_name_owner ())
    {
        /* Create DBUS proxy */
        proxy = ephy_dbus_get_proxy (ephy_dbus_get_default (), EPHY_DBUS_SESSION);
        if (proxy == NULL)
        {
            error = g_error_new (STARTUP_ERROR_QUARK,
                         0,
                         "Unable to get DBus proxy; aborting activation."); /* FIXME i18n */

            _ephy_dbus_release ();

            show_error_message (&error);

            exit (1);
        }

        if (!call_dbus_proxy (proxy, user_time, &error))
        {
            _ephy_dbus_release ();

            show_error_message (&error);

            exit (1);
        }

        /* Wait for the response */
        gtk_main ();

        _ephy_dbus_release ();

        gdk_notify_startup_complete ();

        exit (0);
    }

    /* We're not remoting; start our services */
    if (!ephy_file_helpers_init (profile_directory,
                     private_instance,
                     keep_temp_directory || profile_directory,
                     &error))
    {
        _ephy_dbus_release ();

        show_error_message (&error);

        exit (1);
    }

    /* Migrate profile if we are not running a private instance */
        if (ephy_has_private_profile () == FALSE)
          _ephy_profile_migrate ();

    eel_gconf_monitor_add ("/apps/epiphany/general");
    ephy_stock_icons_init ();
    load_accels ();

    /* Work-around Flash Player crash */
    g_setenv ("XLIB_SKIP_ARGB_VISUALS", "1", FALSE);

    /* Now create the shell */
    _ephy_shell_create_instance ();
    g_signal_connect (ephy_shell, "quit", G_CALLBACK (shell_quit_cb), NULL);

    queue_commands (user_time);

#ifdef HAVE_LIBNOTIFY   
    /* Init notifications for the download manager */
    notify_init (PACKAGE);
#endif

    gtk_main ();

    /* Shutdown */
    g_object_unref (ephy_shell);

#ifdef HAVE_LIBNOTIFY   
    if (notify_is_initted ())
        notify_uninit ();
#endif
    eel_gconf_monitor_remove ("/apps/epiphany/general");
    save_accels ();
    ephy_state_save ();
    ephy_file_helpers_shutdown ();
    xmlCleanupParser ();

    _ephy_dbus_release ();

    return 0;
}