Filtered events.

chrome/browser/extensions/extension_prefs.cc

Index: chrome/browser/extensions/extension_prefs.cc
diff --git a/chrome/browser/extensions/extension_prefs.cc b/chrome/browser/extensions/extension_prefs.cc
index 41c10171a5dee562a3c3b21bb4a7450a7e186720..1d0e6fdc469e2f07228dcd59a4ab341f1cc2f9f1 100644
--- a/chrome/browser/extensions/extension_prefs.cc
+++ b/chrome/browser/extensions/extension_prefs.cc
@@ -171,6 +171,10 @@ const char kPrefIncognitoContentSettings[] = "incognito_content_settings";
 // background page.
 const char kRegisteredEvents[] = "events";
 
+// A dictionary of event names to lists of filters that this extension has
+// registered from its lazy background page.
+const char kFilteredEvents[] = "filtered_events";
+
 // A list of alarms that this extension has set.
 const char kRegisteredAlarms[] = "alarms";
 const char kAlarmScheduledRunTime[] = "scheduled_run_time";
@@ -947,6 +951,66 @@ std::set<std::string> ExtensionPrefs::GetRegisteredEvents(
   return events;
 }
 
+void ExtensionPrefs::AddFilterToEvent(const std::string& event_name,
+                                      const std::string& extension_id,
+                                      const DictionaryValue* filter) {
+  const DictionaryValue* filtered_events = GetFilteredEvents(extension_id);
+  scoped_ptr<DictionaryValue> new_filtered_events;
+  if (!filtered_events)
+    new_filtered_events.reset(new DictionaryValue);
+  else
+    new_filtered_events.reset(filtered_events->DeepCopy());
+
+  ListValue* filter_list = NULL;
+  if (!new_filtered_events->GetList(event_name, &filter_list)) {
+    filter_list = new ListValue();
+    new_filtered_events->Set(event_name, filter_list);
+  }
+  filter_list->Append(filter->DeepCopy());
+
+  UpdateExtensionPref(extension_id, kFilteredEvents,
+                      new_filtered_events.release());
+}
+
+void ExtensionPrefs::RemoveFilterFromEvent(const std::string& event_name,
+                                           const std::string& extension_id,
+                                           const DictionaryValue* filter) {
+  const DictionaryValue* filtered_events = GetFilteredEvents(extension_id);
+  if (!filtered_events)
+    return;
+
+  scoped_ptr<DictionaryValue> new_filtered_events(filtered_events->DeepCopy());
+  ListValue* filter_list;
+  if (!new_filtered_events->GetList(event_name, &filter_list))
+    return;
+
+  bool removed = false;
+  for (size_t i = 0; i < filter_list->GetSize(); i++) {
+    DictionaryValue* filter;
+    CHECK(filter_list->GetDictionary(i, &filter));
+    if (filter->Equals(filter)) {
+      filter_list->Remove(i, NULL);
+      removed = true;
+      break;
+    }
+  }
+
+  if (removed)
+    UpdateExtensionPref(extension_id, kFilteredEvents,
+                        new_filtered_events.release());
+}
+
+const DictionaryValue* ExtensionPrefs::GetFilteredEvents(
+    const std::string& extension_id) {
+  const DictionaryValue* extension = GetExtensionPref(extension_id);
+  if (!extension)
+    return NULL;
+  DictionaryValue* result = NULL;
+  if (!extension->GetDictionary(kFilteredEvents, &result))
+    return NULL;
+  return result;
+}
+
 void ExtensionPrefs::SetRegisteredEvents(
     const std::string& extension_id, const std::set<std::string>& events) {
   ListValue* value = new ListValue();