Raymond Hill
10 years ago
committed by
gorhill
1 changed files with 151 additions and 0 deletions
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/******************************************************************************* |
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µBlock - a Chromium browser extension to block requests. |
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Copyright (C) 2014 The µBlock authors |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program. If not, see {http://www.gnu.org/licenses/}.
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Home: https://github.com/gorhill/uBlock
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*/ |
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// For non background pages
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/* global self, chrome, vAPI */ |
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/******************************************************************************/ |
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(function() { |
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'use strict'; |
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/******************************************************************************/ |
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self.vAPI = self.vAPI || {}; |
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self.vAPI.chrome = true; |
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/******************************************************************************/ |
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var messagingConnector = function(response) { |
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if ( !response ) { |
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return; |
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} |
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var channels = vAPI.messaging.channels; |
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var channel, listener; |
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if ( response.broadcast === true ) { |
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for ( channel in channels ) { |
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if ( channels.hasOwnProperty(channel) === false ) { |
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continue; |
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} |
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listener = channels[channel].listener; |
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if ( typeof listener === 'function' ) { |
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listener(response.msg); |
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} |
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} |
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return; |
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} |
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if ( response.requestId ) { |
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listener = vAPI.messaging.listeners[response.requestId]; |
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delete vAPI.messaging.listeners[response.requestId]; |
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delete response.requestId; |
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} |
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if ( !listener ) { |
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channel = channels[response.portName]; |
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listener = channel && channel.listener; |
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} |
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if ( typeof listener === 'function' ) { |
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listener(response.msg); |
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} |
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}; |
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/******************************************************************************/ |
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var uniqueId = function() { |
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return parseInt(Math.random() * 1e10, 10).toString(36); |
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}; |
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/******************************************************************************/ |
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self.vAPI.messaging = { |
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port: null, |
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channels: {}, |
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listeners: {}, |
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requestId: 1, |
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connectorId: uniqueId(), |
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setup: function() { |
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this.port = chrome.runtime.connect({name: this.connectorId}); |
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this.port.onMessage.addListener(messagingConnector); |
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}, |
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close: function() { |
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if ( this.port === null ) { |
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return; |
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} |
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this.port.disconnect(); |
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this.port.onMessage.removeListener(messagingConnector); |
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this.port = null; |
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this.channels = {}; |
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this.listeners = {}; |
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}, |
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channel: function(channelName, callback) { |
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if ( !channelName ) { |
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return; |
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} |
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this.channels[channelName] = { |
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portName: channelName, |
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listener: typeof callback === 'function' ? callback : null, |
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send: function(message, callback) { |
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if ( vAPI.messaging.port === null ) { |
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vAPI.messaging.setup(); |
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} |
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message = { |
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portName: this.portName, |
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msg: message |
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}; |
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if ( callback ) { |
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message.requestId = vAPI.messaging.requestId++; |
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vAPI.messaging.listeners[message.requestId] = callback; |
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} |
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vAPI.messaging.port.postMessage(message); |
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}, |
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close: function() { |
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delete vAPI.messaging.channels[this.portName]; |
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} |
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}; |
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return this.channels[channelName]; |
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} |
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}; |
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/******************************************************************************/ |
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self.vAPI.canExecuteContentScript = function() { |
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return true; |
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}; |
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/******************************************************************************/ |
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})(); |
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/******************************************************************************/ |
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