1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/settings/SettingsDB.jsm Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,205 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +"use strict";
1.9 +
1.10 +let Cc = Components.classes;
1.11 +let Ci = Components.interfaces;
1.12 +let Cu = Components.utils;
1.13 +
1.14 +Cu.import("resource://gre/modules/Services.jsm");
1.15 +Cu.import("resource://gre/modules/ObjectWrapper.jsm");
1.16 +
1.17 +this.EXPORTED_SYMBOLS = ["SettingsDB", "SETTINGSDB_NAME", "SETTINGSSTORE_NAME"];
1.18 +
1.19 +const DEBUG = false;
1.20 +function debug(s) {
1.21 + if (DEBUG) dump("-*- SettingsDB: " + s + "\n");
1.22 +}
1.23 +
1.24 +this.SETTINGSDB_NAME = "settings";
1.25 +this.SETTINGSDB_VERSION = 3;
1.26 +this.SETTINGSSTORE_NAME = "settings";
1.27 +
1.28 +Cu.import("resource://gre/modules/IndexedDBHelper.jsm");
1.29 +Cu.import("resource://gre/modules/FileUtils.jsm");
1.30 +Cu.import("resource://gre/modules/NetUtil.jsm");
1.31 +
1.32 +this.SettingsDB = function SettingsDB() {}
1.33 +
1.34 +SettingsDB.prototype = {
1.35 +
1.36 + __proto__: IndexedDBHelper.prototype,
1.37 +
1.38 + upgradeSchema: function upgradeSchema(aTransaction, aDb, aOldVersion, aNewVersion) {
1.39 + let objectStore;
1.40 + if (aOldVersion == 0) {
1.41 + objectStore = aDb.createObjectStore(SETTINGSSTORE_NAME, { keyPath: "settingName" });
1.42 + if (DEBUG) debug("Created object stores");
1.43 + } else if (aOldVersion == 1) {
1.44 + if (DEBUG) debug("Get object store for upgrade and remove old index");
1.45 + objectStore = aTransaction.objectStore(SETTINGSSTORE_NAME);
1.46 + objectStore.deleteIndex("settingValue");
1.47 + } else {
1.48 + if (DEBUG) debug("Get object store for upgrade");
1.49 + objectStore = aTransaction.objectStore(SETTINGSSTORE_NAME);
1.50 + }
1.51 +
1.52 + // Loading resource://app/defaults/settings.json doesn't work because
1.53 + // settings.json is not in the omnijar.
1.54 + // So we look for the app dir instead and go from here...
1.55 + let settingsFile = FileUtils.getFile("DefRt", ["settings.json"], false);
1.56 + if (!settingsFile || (settingsFile && !settingsFile.exists())) {
1.57 + // On b2g desktop builds the settings.json file is moved in the
1.58 + // profile directory by the build system.
1.59 + settingsFile = FileUtils.getFile("ProfD", ["settings.json"], false);
1.60 + if (!settingsFile || (settingsFile && !settingsFile.exists())) {
1.61 + return;
1.62 + }
1.63 + }
1.64 +
1.65 + let chan = NetUtil.newChannel(settingsFile);
1.66 + let stream = chan.open();
1.67 + // Obtain a converter to read from a UTF-8 encoded input stream.
1.68 + let converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"]
1.69 + .createInstance(Ci.nsIScriptableUnicodeConverter);
1.70 + converter.charset = "UTF-8";
1.71 + let rawstr = converter.ConvertToUnicode(NetUtil.readInputStreamToString(
1.72 + stream,
1.73 + stream.available()) || "");
1.74 + let settings;
1.75 + try {
1.76 + settings = JSON.parse(rawstr);
1.77 + } catch(e) {
1.78 + if (DEBUG) debug("Error parsing " + settingsFile.path + " : " + e);
1.79 + return;
1.80 + }
1.81 + stream.close();
1.82 +
1.83 + objectStore.openCursor().onsuccess = function(event) {
1.84 + let cursor = event.target.result;
1.85 + if (cursor) {
1.86 + let value = cursor.value;
1.87 + if (value.settingName in settings) {
1.88 + if (DEBUG) debug("Upgrade " +settings[value.settingName]);
1.89 + value.defaultValue = this.prepareValue(settings[value.settingName]);
1.90 + delete settings[value.settingName];
1.91 + if ("settingValue" in value) {
1.92 + value.userValue = this.prepareValue(value.settingValue);
1.93 + delete value.settingValue;
1.94 + }
1.95 + cursor.update(value);
1.96 + } else if ("userValue" in value || "settingValue" in value) {
1.97 + value.defaultValue = undefined;
1.98 + if (aOldVersion == 1 && value.settingValue) {
1.99 + value.userValue = this.prepareValue(value.settingValue);
1.100 + delete value.settingValue;
1.101 + }
1.102 + cursor.update(value);
1.103 + } else {
1.104 + cursor.delete();
1.105 + }
1.106 + cursor.continue();
1.107 + } else {
1.108 + for (let name in settings) {
1.109 + let value = this.prepareValue(settings[name]);
1.110 + if (DEBUG) debug("Set new:" + name +", " + value);
1.111 + objectStore.add({ settingName: name, defaultValue: value, userValue: undefined });
1.112 + }
1.113 + }
1.114 + }.bind(this);
1.115 + },
1.116 +
1.117 + // If the value is a data: uri, convert it to a Blob.
1.118 + convertDataURIToBlob: function(aValue) {
1.119 + /* base64 to ArrayBuffer decoding, from
1.120 + https://developer.mozilla.org/en-US/docs/Web/JavaScript/Base64_encoding_and_decoding
1.121 + */
1.122 + function b64ToUint6 (nChr) {
1.123 + return nChr > 64 && nChr < 91 ?
1.124 + nChr - 65
1.125 + : nChr > 96 && nChr < 123 ?
1.126 + nChr - 71
1.127 + : nChr > 47 && nChr < 58 ?
1.128 + nChr + 4
1.129 + : nChr === 43 ?
1.130 + 62
1.131 + : nChr === 47 ?
1.132 + 63
1.133 + :
1.134 + 0;
1.135 + }
1.136 +
1.137 + function base64DecToArr(sBase64, nBlocksSize) {
1.138 + let sB64Enc = sBase64.replace(/[^A-Za-z0-9\+\/]/g, ""),
1.139 + nInLen = sB64Enc.length,
1.140 + nOutLen = nBlocksSize ? Math.ceil((nInLen * 3 + 1 >> 2) / nBlocksSize) * nBlocksSize
1.141 + : nInLen * 3 + 1 >> 2,
1.142 + taBytes = new Uint8Array(nOutLen);
1.143 +
1.144 + for (let nMod3, nMod4, nUint24 = 0, nOutIdx = 0, nInIdx = 0; nInIdx < nInLen; nInIdx++) {
1.145 + nMod4 = nInIdx & 3;
1.146 + nUint24 |= b64ToUint6(sB64Enc.charCodeAt(nInIdx)) << 18 - 6 * nMod4;
1.147 + if (nMod4 === 3 || nInLen - nInIdx === 1) {
1.148 + for (nMod3 = 0; nMod3 < 3 && nOutIdx < nOutLen; nMod3++, nOutIdx++) {
1.149 + taBytes[nOutIdx] = nUint24 >>> (16 >>> nMod3 & 24) & 255;
1.150 + }
1.151 + nUint24 = 0;
1.152 + }
1.153 + }
1.154 + return taBytes;
1.155 + }
1.156 +
1.157 + // Check if we have a data: uri, and if it's base64 encoded.
1.158 + // data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEA...
1.159 + if (typeof aValue == "string" && aValue.startsWith("data:")) {
1.160 + try {
1.161 + let uri = Services.io.newURI(aValue, null, null);
1.162 + // XXX: that would be nice to reuse the c++ bits of the data:
1.163 + // protocol handler instead.
1.164 + let mimeType = "application/octet-stream";
1.165 + let mimeDelim = aValue.indexOf(";");
1.166 + if (mimeDelim !== -1) {
1.167 + mimeType = aValue.substring(5, mimeDelim);
1.168 + }
1.169 + let start = aValue.indexOf(",") + 1;
1.170 + let isBase64 = ((aValue.indexOf("base64") + 7) == start);
1.171 + let payload = aValue.substring(start);
1.172 +
1.173 + return new Blob([isBase64 ? base64DecToArr(payload) : payload],
1.174 + { type: mimeType });
1.175 + } catch(e) {
1.176 + dump(e);
1.177 + }
1.178 + }
1.179 + return aValue
1.180 + },
1.181 +
1.182 + // Makes sure any property that is a data: uri gets converted to a Blob.
1.183 + prepareValue: function(aObject) {
1.184 + let kind = ObjectWrapper.getObjectKind(aObject);
1.185 + if (kind == "array") {
1.186 + let res = [];
1.187 + aObject.forEach(function(aObj) {
1.188 + res.push(this.prepareValue(aObj));
1.189 + }, this);
1.190 + return res;
1.191 + } else if (kind == "file" || kind == "blob" || kind == "date") {
1.192 + return aObject;
1.193 + } else if (kind == "primitive") {
1.194 + return this.convertDataURIToBlob(aObject);
1.195 + }
1.196 +
1.197 + // Fall-through, we now have a dictionary object.
1.198 + for (let prop in aObject) {
1.199 + aObject[prop] = this.prepareValue(aObject[prop]);
1.200 + }
1.201 + return aObject;
1.202 + },
1.203 +
1.204 + init: function init() {
1.205 + this.initDBHelper(SETTINGSDB_NAME, SETTINGSDB_VERSION,
1.206 + [SETTINGSSTORE_NAME]);
1.207 + }
1.208 +}
