[rygel] rygel: Chage user config change event logic

[Jens Georg <jensgeorg src gnome org>]

commit 2cfbcd1a22344f79a2c768a9ce7bc63940ced327
Author: Jens Georg <mail jensge org>
Date:   Fri Feb 26 20:44:48 2016 +0100

    rygel: Chage user config change event logic
    
    Instead of re-reading on every file event, either do it on "changes done" or
    after 500ms with no file event.
    
    Signed-off-by: Jens Georg <mail jensge org>

 src/rygel/rygel-user-config.vala |   42 ++++++++++++++++++++++++++++++++++---
 1 files changed, 38 insertions(+), 4 deletions(-)
---
diff --git a/src/rygel/rygel-user-config.vala b/src/rygel/rygel-user-config.vala
index be31a23..7998c1f 100644
--- a/src/rygel/rygel-user-config.vala
+++ b/src/rygel/rygel-user-config.vala
@@ -61,6 +61,9 @@ public class Rygel.UserConfig : GLib.Object, Configuration {
     // Our singleton
     private static UserConfig config;
 
+    private uint system_config_timer_id = 0;
+    private uint local_config_timer_id = 0;
+
     private class ConfigPair {
         public ConfigurationEntry entry;
         public EntryType type;
@@ -724,7 +727,6 @@ public class Rygel.UserConfig : GLib.Object, Configuration {
             sys_key_file.load_from_file (system.get_path (),
                                          KeyFileFlags.KEEP_COMMENTS |
                                          KeyFileFlags.KEEP_TRANSLATIONS);
-
         } catch (GLib.Error e) {}
 
         this.compare_and_notify (this.key_file, sys_key_file);
@@ -737,7 +739,6 @@ public class Rygel.UserConfig : GLib.Object, Configuration {
             key_file.load_from_file (local.get_path (),
                                      KeyFileFlags.KEEP_COMMENTS |
                                      KeyFileFlags.KEEP_TRANSLATIONS);
-
         } catch (GLib.Error e) {}
 
         this.compare_and_notify (key_file, this.sys_key_file);
@@ -747,13 +748,46 @@ public class Rygel.UserConfig : GLib.Object, Configuration {
                                            File file,
                                            File? other_file,
                                            FileMonitorEvent event_type) {
-        this.reload_compare_and_notify_system (file);
+        if (event_type == FileMonitorEvent.CHANGES_DONE_HINT) {
+            if (this.system_config_timer_id != 0) {
+                Source.remove (this.system_config_timer_id);
+                this.system_config_timer_id = 0;
+            }
+            this.reload_compare_and_notify_system (file);
+        } else {
+            if (this.system_config_timer_id != 0) {
+                Source.remove (this.system_config_timer_id);
+            }
+            this.system_config_timer_id = Timeout.add (500, () => {
+                this.system_config_timer_id = 0;
+                this.reload_compare_and_notify_system (file);
+
+                return false;
+            });
+        }
     }
 
     private void on_local_config_changed (FileMonitor monitor,
                                           File file,
                                           File? other_file,
                                           FileMonitorEvent event_type) {
-        this.reload_compare_and_notify_local (file);
+        if (event_type == FileMonitorEvent.CHANGES_DONE_HINT) {
+            if (this.local_config_timer_id != 0) {
+                Source.remove (this.local_config_timer_id);
+                this.local_config_timer_id = 0;
+            }
+            this.reload_compare_and_notify_local (file);
+        } else {
+            if (this.local_config_timer_id != 0) {
+                Source.remove (this.local_config_timer_id);
+            }
+
+            this.local_config_timer_id = Timeout.add (500, () => {
+                this.local_config_timer_id = 0;
+                this.reload_compare_and_notify_local (file);
+
+                return false;
+            });
+        }
     }
 }