[gvfs] gvfs-copy: Make the progress output usable

[Ross Lagerwall <rossl src gnome org>]

commit c12758233bbeef5728e1589d908106ac5d1f1417
Author: Ross Lagerwall <rosslagerwall gmail com>
Date:   Thu Apr 17 08:18:14 2014 +0100

    gvfs-copy: Make the progress output usable
    
    Rather than spamming the screen with output, rate-limit the updates and
    make them display over each other.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=637543

 programs/gvfs-copy.c |   38 ++++++++++++++++++++++++++------------
 1 files changed, 26 insertions(+), 12 deletions(-)
---
diff --git a/programs/gvfs-copy.c b/programs/gvfs-copy.c
index 7a61dcf..14d569c 100644
--- a/programs/gvfs-copy.c
+++ b/programs/gvfs-copy.c
@@ -65,22 +65,34 @@ is_dir (GFile *file)
   return res;
 }
 
-static GTimeVal start_time;
+static gint64 start_time;
+static gint64 previous_time;
 static void
 show_progress (goffset current_num_bytes,
               goffset total_num_bytes,
               gpointer user_data)
 {
-  GTimeVal tv;
-  char *size;
-
-  g_get_current_time (&tv);
-
-  size = g_format_size (current_num_bytes / MAX (tv.tv_sec - start_time.tv_sec, 1));
-  g_print (_("progress"));
-  g_print (" %"G_GINT64_FORMAT"/%"G_GINT64_FORMAT" (%s/s)\n",
-          current_num_bytes, total_num_bytes, size);
-  g_free (size);
+  gint64 tv;
+  char *current_size, *total_size, *rate;
+
+  tv = g_get_monotonic_time ();
+  if (tv - previous_time < (G_USEC_PER_SEC / 5) &&
+      current_num_bytes != total_num_bytes)
+    return;
+
+  current_size = g_format_size (current_num_bytes);
+  total_size = g_format_size (total_num_bytes);
+  rate = g_format_size (current_num_bytes /
+                        MAX ((tv - start_time) / G_USEC_PER_SEC, 1));
+  g_print ("\r\033[K");
+  g_print (_("Transferred %s out of %s (%s/s)"),
+           current_size, total_size, rate);
+
+  previous_time = tv;
+
+  g_free (current_size);
+  g_free (total_size);
+  g_free (rate);
 }
 
 static void
@@ -195,7 +207,7 @@ main (int argc, char *argv[])
 
 
       error = NULL;
-      g_get_current_time (&start_time);
+      start_time = g_get_monotonic_time ();
       if (!g_file_copy (source, target, flags, NULL, progress?show_progress:NULL, NULL, &error))
        {
          if (interactive && g_error_matches (error, G_IO_ERROR, G_IO_ERROR_EXISTS))
@@ -225,6 +237,8 @@ main (int argc, char *argv[])
              retval = 1;
            }
        }
+      if (progress && retval == 0)
+       g_print("\n");
 
       g_object_unref (source);
       g_object_unref (target);