Issue 5063 - [emscripten] Make FilterNotifier calls more efficient

compiled/FilterNotifier.h

+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2017 eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus 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 Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <cstdio>
+
+#include "String.h"
+
+class Filter;
+class Subscription;
+
+namespace FilterNotifier
+{
+  enum class Topic
+  {
+    NONE,
+    FILTER_DISABLED,
+    FILTER_HITCOUNT,
+    FILTER_LASTHIT,
+    SUBSCRIPTION_TITLE,
+    SUBSCRIPTION_DISABLED,
+    SUBSCRIPTION_FIXEDTITLE,
+    SUBSCRIPTION_HOMEPAGE,
+    SUBSCRIPTION_LASTCHECK,
+    SUBSCRIPTION_LASTDOWNLOAD,
+    SUBSCRIPTION_DOWNLOADSTATUS,
+    SUBSCRIPTION_ERRORS,
+  };
+
+  inline void GenerateCustomBindings()
+  {
+    printf("var FilterNotifier = require('filterNotifier').FilterNotifier;\n");
+    printf("var notifierTopics = new Map([\n");
+    printf("  [%i, 'filter.disabled'],\n", Topic::FILTER_DISABLED);
+    printf("  [%i, 'filter.hitCount'],\n", Topic::FILTER_HITCOUNT);
+    printf("  [%i, 'filter.lastHit'],\n", Topic::FILTER_LASTHIT);
+    printf("  [%i, 'subscription.title'],\n", Topic::SUBSCRIPTION_TITLE);
+    printf("  [%i, 'subscription.disabled'],\n", Topic::SUBSCRIPTION_DISABLED);
+    printf("  [%i, 'subscription.fixedTitle'],\n", Topic::SUBSCRIPTION_FIXEDTITLE);
+    printf("  [%i, 'subscription.homepage'],\n", Topic::SUBSCRIPTION_HOMEPAGE);
+    printf("  [%i, 'subscription.lastCheck'],\n", Topic::SUBSCRIPTION_LASTCHECK);
+    printf("  [%i, 'subscription.lastDownload'],\n", Topic::SUBSCRIPTION_LASTDOWNLOAD);
+    printf("  [%i, 'subscription.downloadStatus'],\n", Topic::SUBSCRIPTION_DOWNLOADSTATUS);
+    printf("  [%i, 'subscription.errors'],\n", Topic::SUBSCRIPTION_ERRORS);
+    printf("]);");
+  }
+
+  void FilterChange(Topic topic, Filter* filter);
+  void SubscriptionChange(Topic topic, Subscription* subscription);
+}