commit 847b5368b573508a66c7ba38a2148fe36289fe23 Author: Arthur Edelstein arthuredelstein@gmail.com Date: Mon May 16 11:00:16 2016 -0700

Bug 18619: If indexedDB disabled, use in-memory db for asyncStorage.js --- devtools/shared/async-storage.js | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+)

diff --git a/devtools/shared/async-storage.js b/devtools/shared/async-storage.js index 7bd05b6..4eb2889 100644 --- a/devtools/shared/async-storage.js +++ b/devtools/shared/async-storage.js @@ -42,10 +42,37 @@ const {Cc, Ci, Cu, Cr} = require("chrome"); const {indexedDB} = require("sdk/indexed-db"); const Promise = require("promise"); +const prefs = require("sdk/preferences/service"); + +// Substitute memory-only "database" when "dom.indexedDB.enabled" is false. +// Match the API and behavior of the indexedDB-based version. +const memoryDB = function () { + let dbMap = new Map(); + return { + getItem : k => { + let value = dbMap.get(k); + // Match the behavior of indexedDB-based implementation + // when an item is not present. + if (value === undefined) { + value = null; + } + return Promise.resolve(value); + }, + setItem : (k, v) => Promise.resolve(dbMap.set(k, v)), + removeItem : k => Promise.resolve(dbMap.delete(k)), + clear : () => Promise.resolve(dbMap.clear()), + length : () => Promise.resolve(dbMap.size), + key : n => Promise.resolve(Array.from(dbMap.keys())[n]) + }; +};

module.exports = (function() { "use strict";

+ if (!prefs.get('dom.indexedDB.enabled', true)) { + return memoryDB(); + } + var DBNAME = "devtools-async-storage"; var DBVERSION = 1; var STORENAME = "keyvaluepairs";