4 files changed, 433 insertions, 0 deletions
diff --git a/toolkit/jetpack/sdk/preferences/event-target.js b/toolkit/jetpack/sdk/preferences/event-target.js
new file mode 100644
index 000000000..b64ba303c
--- /dev/null
+++ b/toolkit/jetpack/sdk/preferences/event-target.js
@@ -0,0 +1,61 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+'use strict';
+
+module.metadata = {
+  "stability": "unstable"
+};
+
+const { Cc, Ci } = require('chrome');
+const { Class } = require('../core/heritage');
+const { EventTarget } = require('../event/target');
+const { Branch } = require('./service');
+const { emit, off } = require('../event/core');
+const { when: unload } = require('../system/unload');
+
+const prefTargetNS = require('../core/namespace').ns();
+
+const PrefsTarget = Class({
+  extends: EventTarget,
+  initialize: function(options) {
+    options = options || {};
+    EventTarget.prototype.initialize.call(this, options);
+
+    let branchName = options.branchName || '';
+    let branch = Cc["@mozilla.org/preferences-service;1"].
+        getService(Ci.nsIPrefService).
+        getBranch(branchName).
+        QueryInterface(Ci.nsIPrefBranch2);
+    prefTargetNS(this).branch = branch;
+
+    // provides easy access to preference values
+    this.prefs = Branch(branchName);
+
+    // start listening to preference changes
+    let observer = prefTargetNS(this).observer = onChange.bind(this);
+    branch.addObserver('', observer, false);
+
+    // Make sure to destroy this on unload
+    unload(destroy.bind(this));
+  }
+});
+exports.PrefsTarget = PrefsTarget;
+
+/* HELPERS */
+
+function onChange(subject, topic, name) {
+  if (topic === 'nsPref:changed') {
+    emit(this, name, name);
+    emit(this, '', name);
+  }
+}
+
+function destroy() {
+  off(this);
+
+  // stop listening to preference changes
+  let branch = prefTargetNS(this).branch;
+  branch.removeObserver('', prefTargetNS(this).observer, false);
+  prefTargetNS(this).observer = null;
+}
diff --git a/toolkit/jetpack/sdk/preferences/native-options.js b/toolkit/jetpack/sdk/preferences/native-options.js
new file mode 100644
index 000000000..840997df9
--- /dev/null
+++ b/toolkit/jetpack/sdk/preferences/native-options.js
@@ -0,0 +1,193 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+'use strict';
+
+module.metadata = {
+  "stability": "unstable"
+};
+
+const { Cc, Ci, Cu } = require('chrome');
+const { on } = require('../system/events');
+const { id, preferencesBranch } = require('../self');
+const { localizeInlineOptions } = require('../l10n/prefs');
+const { Services } = require("resource://gre/modules/Services.jsm");
+const { AddonManager } = Cu.import("resource://gre/modules/AddonManager.jsm");
+const { defer } = require("sdk/core/promise");
+
+const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";;
+const DEFAULT_OPTIONS_URL = 'data:text/xml,<placeholder/>';
+
+const VALID_PREF_TYPES = ['bool', 'boolint', 'integer', 'string', 'color',
+                          'file', 'directory', 'control', 'menulist', 'radio'];
+
+const isFennec = require("sdk/system/xul-app").is("Fennec");
+
+function enable({ preferences, id }) {
+  let enabled = defer();
+
+  validate(preferences);
+
+  setDefaults(preferences, preferencesBranch);
+
+  // allow the use of custom options.xul
+  AddonManager.getAddonByID(id, (addon) => {
+    on('addon-options-displayed', onAddonOptionsDisplayed, true);
+    enabled.resolve({ id: id });
+  });
+
+  function onAddonOptionsDisplayed({ subject: doc, data }) {
+    if (data === id) {
+      let parent;
+
+      if (isFennec) {
+        parent = doc.querySelector('.options-box');
+
+        // NOTE: This disable the CSS rule that makes the options invisible
+        let item = doc.querySelector('#addons-details .addon-item');
+        item.removeAttribute("optionsURL");
+      } else {
+        parent = doc.getElementById('detail-downloads').parentNode;
+      }
+
+      if (parent) {
+        injectOptions({
+          preferences: preferences,
+          preferencesBranch: preferencesBranch,
+          document: doc,
+          parent: parent,
+          id: id
+        });
+        localizeInlineOptions(doc);
+      } else {
+        throw Error("Preferences parent node not found in Addon Details. The configured custom preferences will not be visible.");
+      }
+    }
+  }
+
+  return enabled.promise;
+}
+exports.enable = enable;
+
+// centralized sanity checks
+function validate(preferences) {
+  for (let { name, title, type, label, options } of preferences) {
+    // make sure the title is set and non-empty
+    if (!title)
+      throw Error("The '" + name + "' pref requires a title");
+
+    // make sure that pref type is a valid inline option type
+    if (!~VALID_PREF_TYPES.indexOf(type))
+      throw Error("The '" + name + "' pref must be of valid type");
+
+    // if it's a control, make sure it has a label
+    if (type === 'control' && !label)
+      throw Error("The '" + name + "' control requires a label");
+
+    // if it's a menulist or radio, make sure it has options
+    if (type === 'menulist' || type === 'radio') {
+      if (!options)
+        throw Error("The '" + name + "' pref requires options");
+
+      // make sure each option has a value and a label
+      for (let item of options) {
+        if (!('value' in item) || !('label' in item))
+          throw Error("Each option requires both a value and a label");
+      }
+    }
+
+    // TODO: check that pref type matches default value type
+  }
+}
+exports.validate = validate;
+
+// initializes default preferences, emulates defaults/prefs.js
+function setDefaults(preferences, preferencesBranch) {
+  const branch = Cc['@mozilla.org/preferences-service;1'].
+                 getService(Ci.nsIPrefService).
+                 getDefaultBranch('extensions.' + preferencesBranch + '.');
+  for (let { name, value } of preferences) {
+    switch (typeof value) {
+      case 'boolean':
+        branch.setBoolPref(name, value);
+        break;
+      case 'number':
+        // must be integer, ignore otherwise
+        if (value % 1 === 0) {
+          branch.setIntPref(name, value);
+        }
+        break;
+      case 'string':
+        let str = Cc["@mozilla.org/supports-string;1"].
+                  createInstance(Ci.nsISupportsString);
+        str.data = value;
+        branch.setComplexValue(name, Ci.nsISupportsString, str);
+        break;
+    }
+  }
+}
+exports.setDefaults = setDefaults;
+
+// dynamically injects inline options into about:addons page at runtime
+// NOTE: on Firefox Desktop the about:addons page is a xul page document,
+// on Firefox for Android the about:addons page is an xhtml page, to support both
+// the XUL xml namespace have to be enforced.
+function injectOptions({ preferences, preferencesBranch, document, parent, id }) {
+  preferences.forEach(({name, type, hidden, title, description, label, options, on, off}) => {
+    if (hidden) {
+      return;
+    }
+
+    let setting = document.createElementNS(XUL_NS, 'setting');
+    setting.setAttribute('pref-name', name);
+    setting.setAttribute('data-jetpack-id', id);
+    setting.setAttribute('pref', 'extensions.' + preferencesBranch + '.' + name);
+    setting.setAttribute('type', type);
+    setting.setAttribute('title', title);
+    if (description)
+      setting.setAttribute('desc', description);
+
+    if (type === 'file' || type === 'directory') {
+      setting.setAttribute('fullpath', 'true');
+    }
+    else if (type === 'control') {
+      let button = document.createElementNS(XUL_NS, 'button');
+      button.setAttribute('pref-name', name);
+      button.setAttribute('data-jetpack-id', id);
+      button.setAttribute('label', label);
+      button.addEventListener('command', function() {
+        Services.obs.notifyObservers(null, `${id}-cmdPressed`, name);
+      }, true);
+      setting.appendChild(button);
+    }
+    else if (type === 'boolint') {
+      setting.setAttribute('on', on);
+      setting.setAttribute('off', off);
+    }
+    else if (type === 'menulist') {
+      let menulist = document.createElementNS(XUL_NS, 'menulist');
+      let menupopup = document.createElementNS(XUL_NS, 'menupopup');
+      for (let { value, label } of options) {
+        let menuitem = document.createElementNS(XUL_NS, 'menuitem');
+        menuitem.setAttribute('value', value);
+        menuitem.setAttribute('label', label);
+        menupopup.appendChild(menuitem);
+      }
+      menulist.appendChild(menupopup);
+      setting.appendChild(menulist);
+    }
+    else if (type === 'radio') {
+      let radiogroup = document.createElementNS(XUL_NS, 'radiogroup');
+      for (let { value, label } of options) {
+        let radio = document.createElementNS(XUL_NS, 'radio');
+        radio.setAttribute('value', value);
+        radio.setAttribute('label', label);
+        radiogroup.appendChild(radio);
+      }
+      setting.appendChild(radiogroup);
+    }
+
+    parent.appendChild(setting);
+  });
+}
+exports.injectOptions = injectOptions;
diff --git a/toolkit/jetpack/sdk/preferences/service.js b/toolkit/jetpack/sdk/preferences/service.js
new file mode 100644
index 000000000..231cd8e14
--- /dev/null
+++ b/toolkit/jetpack/sdk/preferences/service.js
@@ -0,0 +1,137 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+module.metadata = {
+  "stability": "unstable"
+};
+
+// The minimum and maximum integers that can be set as preferences.
+// The range of valid values is narrower than the range of valid JS values
+// because the native preferences code treats integers as NSPR PRInt32s,
+// which are 32-bit signed integers on all platforms.
+const MAX_INT = 0x7FFFFFFF;
+const MIN_INT = -0x80000000;
+
+const {Cc,Ci,Cr} = require("chrome");
+
+const prefService = Cc["@mozilla.org/preferences-service;1"].
+                getService(Ci.nsIPrefService);
+const prefSvc = prefService.getBranch(null);
+const defaultBranch = prefService.getDefaultBranch(null);
+
+const { Preferences } = require("resource://gre/modules/Preferences.jsm");
+const prefs = new Preferences({});
+
+const branchKeys = branchName =>
+  keys(branchName).map($ => $.replace(branchName, ""));
+
+const Branch = function(branchName) {
+  return new Proxy(Branch.prototype, {
+    getOwnPropertyDescriptor(target, name, receiver) {
+      return {
+        configurable: true,
+        enumerable: true,
+        writable: false,
+        value: this.get(target, name, receiver)
+      };
+    },
+    ownKeys(target) {
+      return branchKeys(branchName);
+    },
+    get(target, name, receiver) {
+      return get(`${branchName}${name}`);
+    },
+    set(target, name, value, receiver) {
+      set(`${branchName}${name}`, value);
+      return true;
+    },
+    has(target, name) {
+      return this.hasOwn(target, name);
+    },
+    hasOwn(target, name) {
+      return has(`${branchName}${name}`);
+    },
+    deleteProperty(target, name) {
+      reset(`${branchName}${name}`);
+      return true;
+    }
+  });
+}
+
+
+function get(name, defaultValue) {
+  return prefs.get(name, defaultValue);
+}
+exports.get = get;
+
+
+function set(name, value) {
+  var prefType;
+  if (typeof value != "undefined" && value != null)
+    prefType = value.constructor.name;
+
+  switch (prefType) {
+  case "Number":
+    if (value % 1 != 0)
+      throw new Error("cannot store non-integer number: " + value);
+  }
+
+  prefs.set(name, value);
+}
+exports.set = set;
+
+const has = prefs.has.bind(prefs)
+exports.has = has;
+
+function keys(root) {
+  return prefSvc.getChildList(root);
+}
+exports.keys = keys;
+
+const isSet = prefs.isSet.bind(prefs);
+exports.isSet = isSet;
+
+function reset(name) {
+  try {
+    prefSvc.clearUserPref(name);
+  }
+  catch (e) {
+    // The pref service throws NS_ERROR_UNEXPECTED when the caller tries
+    // to reset a pref that doesn't exist or is already set to its default
+    // value.  This interface fails silently in those cases, so callers
+    // can unconditionally reset a pref without having to check if it needs
+    // resetting first or trap exceptions after the fact.  It passes through
+    // other exceptions, however, so callers know about them, since we don't
+    // know what other exceptions might be thrown and what they might mean.
+    if (e.result != Cr.NS_ERROR_UNEXPECTED) {
+      throw e;
+    }
+  }
+}
+exports.reset = reset;
+
+function getLocalized(name, defaultValue) {
+  let value = null;
+  try {
+    value = prefSvc.getComplexValue(name, Ci.nsIPrefLocalizedString).data;
+  }
+  finally {
+    return value || defaultValue;
+  }
+}
+exports.getLocalized = getLocalized;
+
+function setLocalized(name, value) {
+  // We can't use `prefs.set` here as we have to use `getDefaultBranch`
+  // (instead of `getBranch`) in order to have `mIsDefault` set to true, here:
+  // http://mxr.mozilla.org/mozilla-central/source/modules/libpref/src/nsPrefBranch.cpp#233
+  // Otherwise, we do not enter into this expected condition:
+  // http://mxr.mozilla.org/mozilla-central/source/modules/libpref/src/nsPrefBranch.cpp#244
+  defaultBranch.setCharPref(name, value);
+}
+exports.setLocalized = setLocalized;
+
+exports.Branch = Branch;
+
diff --git a/toolkit/jetpack/sdk/preferences/utils.js b/toolkit/jetpack/sdk/preferences/utils.js
new file mode 100644
index 000000000..1d5769c37
--- /dev/null
+++ b/toolkit/jetpack/sdk/preferences/utils.js
@@ -0,0 +1,42 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+module.metadata = {
+  "stability": "unstable"
+};
+
+const { openTab, getBrowserForTab, getTabId } = require("sdk/tabs/utils");
+const { on, off } = require("sdk/system/events");
+const { getMostRecentBrowserWindow } = require('../window/utils');
+
+// Opens about:addons in a new tab, then displays the inline
+// preferences of the provided add-on
+const open = ({ id }) => new Promise((resolve, reject) => {
+  // opening the about:addons page in a new tab
+  let tab = openTab(getMostRecentBrowserWindow(), "about:addons");
+  let browser = getBrowserForTab(tab);
+
+  // waiting for the about:addons page to load
+  browser.addEventListener("load", function onPageLoad() {
+    browser.removeEventListener("load", onPageLoad, true);
+    let window = browser.contentWindow;
+
+    // wait for the add-on's "addon-options-displayed"
+    on("addon-options-displayed", function onPrefDisplayed({ subject: doc, data }) {
+      if (data === id) {
+        off("addon-options-displayed", onPrefDisplayed);
+        resolve({
+          id: id,
+          tabId: getTabId(tab),
+          "document": doc
+        });
+      }
+    }, true);
+
+    // display the add-on inline preferences page
+    window.gViewController.commands.cmd_showItemDetails.doCommand({ id: id }, true);
+  }, true);
+});
+exports.open = open;