From 505cabbd3036081f26586cabc64c26e7769c0ec9 Mon Sep 17 00:00:00 2001
From: Perberos <perberos@gmail.com>
Date: Thu, 1 Dec 2011 23:53:21 -0300
Subject: moving from https://github.com/perberos/mate-desktop-environment

---
 plugins/xsettings/fontconfig-monitor.c | 192 +++++++++++++++++++++++++++++++++
 1 file changed, 192 insertions(+)
 create mode 100644 plugins/xsettings/fontconfig-monitor.c

(limited to 'plugins/xsettings/fontconfig-monitor.c')

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
-- 
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