mirror of
https://github.com/gorhill/uBlock.git
synced 2024-09-03 01:29:39 +02:00
360 lines
10 KiB
JavaScript
360 lines
10 KiB
JavaScript
/*******************************************************************************
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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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/* global Services */
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// For background page
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/******************************************************************************/
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(function() {
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'use strict';
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/******************************************************************************/
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const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
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Cu['import']('resource://gre/modules/Services.jsm');
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/******************************************************************************/
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self.vAPI = self.vAPI || {};
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vAPI.firefox = true;
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/******************************************************************************/
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var SQLite = {
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open: function() {
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var path = Services.dirsvc.get('ProfD', Ci.nsIFile);
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path.append('extension-data');
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if (!path.exists()) {
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path.create(Ci.nsIFile.DIRECTORY_TYPE, parseInt('0774', 8));
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}
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if (!path.isDirectory()) {
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throw Error('Should be a directory...');
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}
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path.append('uBlock.sqlite');
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this.db = Services.storage.openDatabase(path);
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this.db.executeSimpleSQL(
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'CREATE TABLE IF NOT EXISTS settings' +
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'(name TEXT PRIMARY KEY NOT NULL, value TEXT);'
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);
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},
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close: function() {
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this.run('VACUUM');
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this.db.asyncClose();
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},
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run: function(query, values, callback) {
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if (!this.db) {
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this.open();
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}
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var result = {};
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query = this.db.createAsyncStatement(query);
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if (Array.isArray(values) && values.length) {
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var i = values.length;
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while (i--) {
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query.bindByIndex(i, values[i]);
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}
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}
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query.executeAsync({
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handleResult: function(rows) {
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if (!rows || typeof callback !== 'function') {
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return;
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}
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var row;
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while (row = rows.getNextRow()) {
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// we assume that there will be two columns, since we're
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// using it only for preferences
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result[row.getResultByIndex(0)] = row.getResultByIndex(1);
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}
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},
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handleCompletion: function(reason) {
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if (typeof callback === 'function' && reason === 0) {
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callback(result);
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}
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},
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handleError: function(error) {
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console.error('SQLite error ', error.result, error.message);
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}
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});
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}
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};
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/******************************************************************************/
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vAPI.storage = {
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QUOTA_BYTES: 100 * 1024 * 1024,
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sqlWhere: function(col, valNum) {
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if (valNum > 0) {
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valNum = Array(valNum + 1).join('?, ').slice(0, -2);
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return ' WHERE ' + col + ' IN (' + valNum + ')';
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}
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return '';
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},
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get: function(details, callback) {
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if (typeof callback !== 'function') {
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return;
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}
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var values = [], defaults = false;
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if (details !== null) {
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if (Array.isArray(details)) {
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values = details;
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}
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else if (typeof details === 'object') {
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defaults = true;
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values = Object.keys(details);
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}
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else {
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values = [details.toString()];
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}
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}
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SQLite.run(
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'SELECT * FROM settings' + this.sqlWhere('name', values.length),
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values,
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function(result) {
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var key;
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for (key in result) {
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result[key] = JSON.parse(result[key]);
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}
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if (defaults) {
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for (key in details) {
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if (!result[key]) {
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result[key] = details[key];
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}
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}
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}
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callback(result);
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}
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);
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},
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set: function(details, callback) {
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var key, values = [], questionmarks = [];
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for (key in details) {
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values.push(key);
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values.push(JSON.stringify(details[key]));
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questionmarks.push('?, ?');
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}
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if (!values.length) {
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return;
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}
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SQLite.run(
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'INSERT OR REPLACE INTO settings (name, value) SELECT ' +
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questionmarks.join(' UNION SELECT '),
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values,
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callback
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);
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},
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remove: function(keys, callback) {
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if (typeof keys === 'string') {
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keys = [keys];
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}
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SQLite.run(
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'DELETE FROM settings' + this.sqlWhere('name', keys.length),
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keys,
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callback
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);
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},
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clear: function(callback) {
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SQLite.run('DELETE FROM settings', null, callback);
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SQLite.run('VACUUM');
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},
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getBytesInUse: function(keys, callback) {
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if (typeof callback !== 'function') {
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return;
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}
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SQLite.run(
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"SELECT 'size' AS size, SUM(LENGTH(value)) FROM settings" +
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this.sqlWhere('name', Array.isArray(keys) ? keys.length : 0),
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keys,
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function(result) {
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callback(result.size);
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}
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);
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}
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};
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/******************************************************************************/
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vAPI.messaging = {
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gmm: Cc['@mozilla.org/globalmessagemanager;1'].getService(Ci.nsIMessageListenerManager),
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frameScript: 'chrome://ublock/content/frameScript.js',
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listeners: {},
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defaultHandler: null,
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NOOPFUNC: function(){},
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UNHANDLED: 'vAPI.messaging.notHandled'
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};
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/******************************************************************************/
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vAPI.messaging.gmm.loadFrameScript(vAPI.messaging.frameScript, true);
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/******************************************************************************/
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vAPI.messaging.listen = function(listenerName, callback) {
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this.listeners[listenerName] = callback;
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};
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/******************************************************************************/
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vAPI.messaging.onMessage = function(request) {
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var messageManager = request.target.messageManager;
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var listenerId = request.data.portName.split('|');
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var portName = listenerId[1];
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listenerId = listenerId[0];
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var callback = vAPI.messaging.NOOPFUNC;
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if ( request.data.requestId !== undefined ) {
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callback = function(response) {
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messageManager.sendAsyncMessage(
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listenerId,
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JSON.stringify({
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requestId: request.data.requestId,
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portName: portName,
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msg: response !== undefined ? response : null
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})
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);
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};
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}
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// TODO:
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var sender = {
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tab: {
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id: 0
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}
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};
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// Specific handler
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var r = vAPI.messaging.UNHANDLED;
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var listener = vAPI.messaging.listeners[portName];
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if ( typeof listener === 'function' ) {
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r = listener(request.data.msg, sender, callback);
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}
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if ( r !== vAPI.messaging.UNHANDLED ) {
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return;
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}
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// Default handler
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r = vAPI.messaging.defaultHandler(request.data.msg, sender, callback);
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if ( r !== vAPI.messaging.UNHANDLED ) {
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return;
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}
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console.error('µBlock> messaging > unknown request: %o', request.data);
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// Unhandled:
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// Need to callback anyways in case caller expected an answer, or
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// else there is a memory leak on caller's side
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callback();
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};
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/******************************************************************************/
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vAPI.messaging.setup = function(defaultHandler) {
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// Already setup?
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if ( this.defaultHandler !== null ) {
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return;
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}
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if ( typeof defaultHandler !== 'function' ) {
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defaultHandler = function(){ return vAPI.messaging.UNHANDLED; };
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}
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this.defaultHandler = defaultHandler;
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this.gmm.addMessageListener(vAPI.app.name + ':background', this.onMessage);
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};
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/******************************************************************************/
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vAPI.messaging.broadcast = function(message) {
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this.gmm.broadcastAsyncMessage(
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vAPI.app.name + ':broadcast',
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JSON.stringify({broadcast: true, msg: message})
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);
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};
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/******************************************************************************/
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vAPI.lastError = function() {
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return null;
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};
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/******************************************************************************/
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// clean up when the extension is disabled
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window.addEventListener('unload', function() {
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SQLite.close();
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vAPI.messaging.gmm.removeMessageListener(
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vAPI.app.name + ':background',
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vAPI.messaging.postMessage
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);
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vAPI.messaging.gmm.removeDelayedFrameScript(vAPI.messaging.frameScript);
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// close extension tabs
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var enumerator = Services.wm.getEnumerator('navigator:browser');
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var host = 'ublock';
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var gBrowser, tabs, i, extURI;
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while (enumerator.hasMoreElements()) {
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gBrowser = enumerator.getNext().gBrowser;
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tabs = gBrowser.tabs;
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i = tabs.length;
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while (i--) {
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extURI = tabs[i].linkedBrowser.currentURI;
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if (extURI.scheme === 'chrome' && extURI.host === host) {
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gBrowser.removeTab(tabs[i]);
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}
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}
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}
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});
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/******************************************************************************/
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})();
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/******************************************************************************/
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