1 files changed, 85 insertions, 0 deletions
diff --git a/data/extensions/uBlock0@raymondhill.net/js/broadcast.js b/data/extensions/uBlock0@raymondhill.net/js/broadcast.js
new file mode 100644
index 0000000..61d647f
--- /dev/null
+++ b/data/extensions/uBlock0@raymondhill.net/js/broadcast.js
@@ -0,0 +1,85 @@
+/*******************************************************************************
+
+    uBlock Origin - a comprehensive, efficient content blocker
+    Copyright (C) 2014-present Raymond Hill
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program 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 this program.  If not, see {http://www.gnu.org/licenses/}.
+
+    Home: https://github.com/gorhill/uBlock
+*/
+
+import webext from './webext.js';
+
+/******************************************************************************/
+
+// Broadcast a message to all uBO contexts
+
+let broadcastChannel;
+
+export function broadcast(message) {
+    if ( broadcastChannel === undefined ) {
+        broadcastChannel = new self.BroadcastChannel('uBO');
+    }
+    broadcastChannel.postMessage(message);
+}
+
+/******************************************************************************/
+
+// Broadcast a message to all uBO contexts and all uBO's content scripts
+
+export async function broadcastToAll(message) {
+    broadcast(message);
+    const tabs = await vAPI.tabs.query({
+        discarded: false,
+    });
+    const bcmessage = Object.assign({ broadcast: true }, message);
+    for ( const tab of tabs ) {
+        webext.tabs.sendMessage(tab.id, bcmessage).catch(( ) => { });
+    }
+}
+
+/******************************************************************************/
+
+export function onBroadcast(listener) {
+    const bc = new self.BroadcastChannel('uBO');
+    bc.onmessage = ev => listener(ev.data || {});
+    return bc;
+}
+
+/******************************************************************************/
+
+export function filteringBehaviorChanged(details = {}) {
+    if ( typeof details.direction !== 'number' || details.direction >= 0 ) {
+        filteringBehaviorChanged.throttle.offon(727);
+    }
+    broadcast(Object.assign({ what: 'filteringBehaviorChanged' }, details));
+}
+
+filteringBehaviorChanged.throttle = vAPI.defer.create(( ) => {
+    const { history, max } = filteringBehaviorChanged;
+    const now = (Date.now() / 1000) | 0;
+    if ( history.length >= max ) {
+        if ( (now - history[0]) <= (10 * 60) ) { return; }
+        history.shift();
+    }
+    history.push(now);
+    vAPI.net.handlerBehaviorChanged();
+});
+filteringBehaviorChanged.history = [];
+filteringBehaviorChanged.max = Math.min(
+    browser.webRequest.MAX_HANDLER_BEHAVIOR_CHANGED_CALLS_PER_10_MINUTES - 1,
+    19
+);
+
+/******************************************************************************/