gio/ docs/reference/gio Merged gio-standalone into glib.

2007-11-26  Alexander Larsson  <alexl@redhat.com>

        * Makefile.am:
        * configure.in:
        * gio-2.0-uninstalled.pc.in:
        * gio-2.0.pc.in: 
        * gio-unix-2.0-uninstalled.pc.in:
        * gio-unix-2.0.pc.in:
	* gio/
	* docs/reference/gio
	Merged gio-standalone into glib.
	
        * glib/glibintl.h:
        * glib/gutils.c:
	Export glib_gettext so that gio can use it
	Add P_ (using same domain for now)
	Add I_ as g_intern_static_string


svn path=/trunk/; revision=5941

1 files changed, 226 insertions, 0 deletions

diff --git a/gio/gpollfilemonitor.c b/gio/gpollfilemonitor.c
new file mode 100644
index 000000000..0b5a5e79d
--- /dev/null
+++ b/gio/gpollfilemonitor.c
@@ -0,0 +1,226 @@
+/* GIO - GLib Input, Output and Streaming Library
+ * 
+ * Copyright (C) 2006-2007 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Author: Alexander Larsson <alexl@redhat.com>
+ */
+
+#include <config.h>
+#include <string.h>
+
+#include "gpollfilemonitor.h"
+#include "gfilemonitor.h"
+
+static gboolean g_poll_file_monitor_cancel (GFileMonitor* monitor);
+static void schedule_poll_timeout (GPollFileMonitor* poll_monitor);
+
+struct _GPollFileMonitor
+{
+  GFileMonitor parent_instance;
+  GFile *file;
+  GFileInfo *last_info;
+  guint timeout;
+};
+
+#define POLL_TIME_SECS 5
+
+G_DEFINE_TYPE (GPollFileMonitor, g_poll_file_monitor, G_TYPE_FILE_MONITOR)
+
+static void
+g_poll_file_monitor_finalize (GObject* object)
+{
+  GPollFileMonitor* poll_monitor;
+  
+  poll_monitor = G_POLL_FILE_MONITOR (object);
+
+  g_object_unref (poll_monitor->file);
+
+  if (G_OBJECT_CLASS (g_poll_file_monitor_parent_class)->finalize)
+    (*G_OBJECT_CLASS (g_poll_file_monitor_parent_class)->finalize) (object);
+}
+
+
+static void
+g_poll_file_monitor_class_init (GPollFileMonitorClass* klass)
+{
+  GObjectClass* gobject_class = G_OBJECT_CLASS (klass);
+  GFileMonitorClass *file_monitor_class = G_FILE_MONITOR_CLASS (klass);
+  
+  gobject_class->finalize = g_poll_file_monitor_finalize;
+
+  file_monitor_class->cancel = g_poll_file_monitor_cancel;
+}
+
+static void
+g_poll_file_monitor_init (GPollFileMonitor* poll_monitor)
+{
+}
+
+static int 
+safe_strcmp (const char *a, const char *b)
+{
+  if (a == NULL && b == NULL)
+    return 0;
+  if (a == NULL)
+    return -1;
+  if (b == NULL)
+    return 1;
+  
+  return strcmp (a, b);
+}
+
+static int
+calc_event_type (GFileInfo *last,
+		 GFileInfo *new)
+{
+  if (last == NULL && new == NULL)
+    return -1;
+
+  if (last == NULL && new != NULL)
+    return G_FILE_MONITOR_EVENT_CREATED;
+  
+  if (last != NULL && new == NULL)
+    return G_FILE_MONITOR_EVENT_DELETED;
+
+  if (safe_strcmp (g_file_info_get_etag (last),
+		   g_file_info_get_etag (new)))
+    return G_FILE_MONITOR_EVENT_CHANGED;
+  
+  if (g_file_info_get_size (last) !=
+      g_file_info_get_size (new))
+    return G_FILE_MONITOR_EVENT_CHANGED;
+
+  return -1;
+}
+
+static void
+got_new_info (GObject *source_object,
+	      GAsyncResult *res,
+	      gpointer user_data)
+{
+  GPollFileMonitor* poll_monitor = user_data;
+  GFileInfo *info;
+  int event;
+
+  info = g_file_query_info_finish (poll_monitor->file, res, NULL);
+
+  if (!g_file_monitor_is_cancelled (G_FILE_MONITOR (poll_monitor)))
+    {
+      event = calc_event_type (poll_monitor->last_info, info);
+
+      if (event != -1)
+	{
+	  g_file_monitor_emit_event (G_FILE_MONITOR (poll_monitor),
+				     poll_monitor->file,
+				     NULL, event);
+	  /* We're polling so slowly anyway, so always emit the done hint */
+	  if (event == G_FILE_MONITOR_EVENT_CHANGED)
+	    g_file_monitor_emit_event (G_FILE_MONITOR (poll_monitor),
+				       poll_monitor->file,
+				       NULL, G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT);
+	}
+      
+      if (poll_monitor->last_info)
+	{
+	  g_object_unref (poll_monitor->last_info);
+	  poll_monitor->last_info = NULL;
+	}
+      
+      if (info)
+	poll_monitor->last_info = g_object_ref (info);
+      
+      schedule_poll_timeout (poll_monitor);
+    }
+
+  if (info)
+    g_object_unref (info);
+  
+  g_object_unref (poll_monitor);
+}
+
+static gboolean
+poll_file_timeout (gpointer data)
+{
+  GPollFileMonitor* poll_monitor = data;
+
+  poll_monitor->timeout = FALSE;
+
+  g_file_query_info_async (poll_monitor->file, G_FILE_ATTRIBUTE_ETAG_VALUE "," G_FILE_ATTRIBUTE_STD_SIZE,
+			 0, 0, NULL, got_new_info, g_object_ref (poll_monitor));
+  
+  return FALSE;
+}
+
+static void
+schedule_poll_timeout (GPollFileMonitor* poll_monitor)
+{
+  poll_monitor->timeout = g_timeout_add_seconds (POLL_TIME_SECS, poll_file_timeout, poll_monitor);
+ }
+
+static void
+got_initial_info (GObject *source_object,
+		  GAsyncResult *res,
+		  gpointer user_data)
+{
+  GPollFileMonitor* poll_monitor = user_data;
+  GFileInfo *info;
+
+  info = g_file_query_info_finish (poll_monitor->file, res, NULL);
+
+  poll_monitor->last_info = info;
+
+  if (!g_file_monitor_is_cancelled (G_FILE_MONITOR (poll_monitor)))
+    schedule_poll_timeout (poll_monitor);
+  
+  g_object_unref (poll_monitor);
+}
+
+/**
+ * g_poll_file_monitor_new:
+ * @file:
+ * 
+ * Returns a new #GFileMonitor for the given #GFile. 
+ **/
+GFileMonitor*
+g_poll_file_monitor_new (GFile *file)
+{
+  GPollFileMonitor* poll_monitor;
+  
+  poll_monitor = g_object_new (G_TYPE_POLL_FILE_MONITOR, NULL);
+
+  poll_monitor->file = g_object_ref (file);
+
+  g_file_query_info_async (file, G_FILE_ATTRIBUTE_ETAG_VALUE "," G_FILE_ATTRIBUTE_STD_SIZE,
+			   0, 0, NULL, got_initial_info, g_object_ref (poll_monitor));
+  
+  return G_FILE_MONITOR (poll_monitor);
+}
+
+static gboolean
+g_poll_file_monitor_cancel (GFileMonitor* monitor)
+{
+  GPollFileMonitor *poll_monitor = G_POLL_FILE_MONITOR (monitor);
+  
+  if (poll_monitor->timeout)
+    {
+      g_source_remove (poll_monitor->timeout);
+      poll_monitor->timeout = 0;
+    }
+  
+  return TRUE;
+}