diff options
Diffstat (limited to 'plugins/xsettings/fontconfig-monitor.c')
| -rw-r--r-- | plugins/xsettings/fontconfig-monitor.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/plugins/xsettings/fontconfig-monitor.c b/plugins/xsettings/fontconfig-monitor.c new file mode 100644 index 0000000..bfb15ed --- /dev/null +++ b/plugins/xsettings/fontconfig-monitor.c @@ -0,0 +1,192 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- + * + * Copyright (C) 2008 Red Hat, Inc. + * + * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Author: Behdad Esfahbod, Red Hat, Inc. + */ + +#include "fontconfig-monitor.h" + +#include <gio/gio.h> +#include <fontconfig/fontconfig.h> + +#define TIMEOUT_SECONDS 2 + +static void +stuff_changed (GFileMonitor *monitor, + GFile *file, + GFile *other_file, + GFileMonitorEvent event_type, + gpointer handle); + +void +fontconfig_cache_init (void) +{ + FcInit (); +} + +gboolean +fontconfig_cache_update (void) +{ + return !FcConfigUptoDate (NULL) && FcInitReinitialize (); +} + +static void +monitor_files (GPtrArray *monitors, + FcStrList *list, + gpointer data) +{ + const char *str; + + while ((str = (const char *) FcStrListNext (list))) { + GFile *file; + GFileMonitor *monitor; + + file = g_file_new_for_path (str); + + monitor = g_file_monitor (file, G_FILE_MONITOR_NONE, NULL, NULL); + + g_object_unref (file); + + if (!monitor) + continue; + + g_signal_connect (monitor, "changed", G_CALLBACK (stuff_changed), data); + + g_ptr_array_add (monitors, monitor); + } + + FcStrListDone (list); +} + + +struct _fontconfig_monitor_handle { + GPtrArray *monitors; + + guint timeout; + + GFunc notify_callback; + gpointer notify_data; +}; + +static GPtrArray * +monitors_create (gpointer data) +{ + GPtrArray *monitors = g_ptr_array_new (); + + monitor_files (monitors, FcConfigGetConfigFiles (NULL), data); + monitor_files (monitors, FcConfigGetFontDirs (NULL) , data); + + return monitors; +} + +static void +monitors_free (GPtrArray *monitors) +{ + if (!monitors) + return; + + g_ptr_array_foreach (monitors, (GFunc) g_object_unref, NULL); + g_ptr_array_free (monitors, TRUE); +} + +static gboolean +update (gpointer data) +{ + fontconfig_monitor_handle_t *handle = data; + gboolean notify = FALSE; + + handle->timeout = 0; + + if (fontconfig_cache_update ()) { + notify = TRUE; + monitors_free (handle->monitors); + handle->monitors = monitors_create (data); + } + + /* we finish modifying handle before calling the notify callback, + * allowing the callback to free the monitor if it decides to. */ + + if (notify && handle->notify_callback) + handle->notify_callback (data, handle->notify_data); + + return FALSE; +} + +static void +stuff_changed (GFileMonitor *monitor G_GNUC_UNUSED, + GFile *file G_GNUC_UNUSED, + GFile *other_file G_GNUC_UNUSED, + GFileMonitorEvent event_type G_GNUC_UNUSED, + gpointer data) +{ + fontconfig_monitor_handle_t *handle = data; + + /* wait for quiescence */ + if (handle->timeout) + g_source_remove (handle->timeout); + + handle->timeout = g_timeout_add_seconds (TIMEOUT_SECONDS, update, data); +} + + +fontconfig_monitor_handle_t * +fontconfig_monitor_start (GFunc notify_callback, + gpointer notify_data) +{ + fontconfig_monitor_handle_t *handle = g_slice_new0 (fontconfig_monitor_handle_t); + + handle->notify_callback = notify_callback; + handle->notify_data = notify_data; + handle->monitors = monitors_create (handle); + + return handle; +} + +void +fontconfig_monitor_stop (fontconfig_monitor_handle_t *handle) +{ + if (handle->timeout) + g_source_remove (handle->timeout); + handle->timeout = 0; + + monitors_free (handle->monitors); + handle->monitors = NULL; +} + +#ifdef FONTCONFIG_MONITOR_TEST +static void +yay (void) +{ + g_message ("yay"); +} + +int +main (void) +{ + GMainLoop *loop; + + g_type_init (); + + fontconfig_monitor_start ((GFunc) yay, NULL); + + loop = g_main_loop_new (NULL, TRUE); + g_main_loop_run (loop); + + return 0; +} +#endif |