mirror of
https://github.com/gorhill/uBlock.git
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8693ab738d
vAPI.sessionId - random ID generated every time when a page loads. Having the dialog in an iframe lowers the chance of interference with the styling of the page, also avoids using innerHTML (AMO complaint).
149 lines
4.2 KiB
JavaScript
149 lines
4.2 KiB
JavaScript
/*******************************************************************************
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µBlock - a 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 */
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/******************************************************************************/
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(function(self) {
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'use strict';
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/******************************************************************************/
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var vAPI = self.vAPI = self.vAPI || {};
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var chrome = self.chrome;
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// https://github.com/gorhill/uBlock/issues/456
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// Already injected?
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if ( vAPI.vapiClientInjected ) {
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return;
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}
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vAPI.vapiClientInjected = true;
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vAPI.sessionId = String.fromCharCode(Date.now() % 25 + 97) +
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Math.random().toString(36).slice(2);
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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 && !response.channelName ) {
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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.channelName];
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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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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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setup: function() {
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this.port = chrome.runtime.connect({name: vAPI.sessionId});
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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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channelName: 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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channelName: this.channelName,
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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.channelName];
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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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})(this);
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/******************************************************************************/
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