Move Add-on SDK source to toolkit/jetpack

2 files changed, 399 insertions, 0 deletions

diff --git a/toolkit/jetpack/sdk/ui/toolbar/model.js b/toolkit/jetpack/sdk/ui/toolbar/model.js
new file mode 100644
index 000000000..5c5428606
--- /dev/null
+++ b/toolkit/jetpack/sdk/ui/toolbar/model.js
@@ -0,0 +1,151 @@
+/* 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": "experimental",
+  "engines": {
+    "Firefox": "> 28"
+  }
+};
+
+const { Class } = require("../../core/heritage");
+const { EventTarget } = require("../../event/target");
+const { off, setListeners, emit } = require("../../event/core");
+const { Reactor, foldp, merges, send } = require("../../event/utils");
+const { Disposable } = require("../../core/disposable");
+const { InputPort } = require("../../input/system");
+const { OutputPort } = require("../../output/system");
+const { identify } = require("../id");
+const { pairs, object, map, each } = require("../../util/sequence");
+const { patch, diff } = require("diffpatcher/index");
+const { contract } = require("../../util/contract");
+const { id: addonID } = require("../../self");
+
+// Input state is accumulated from the input received form the toolbar
+// view code & local output. Merging local output reflects local state
+// changes without complete roundloop.
+const input = foldp(patch, {}, new InputPort({ id: "toolbar-changed" }));
+const output = new OutputPort({ id: "toolbar-change" });
+
+// Takes toolbar title and normalizes is to an
+// identifier, also prefixes with add-on id.
+const titleToId = title =>
+  ("toolbar-" + addonID + "-" + title).
+    toLowerCase().
+    replace(/\s/g, "-").
+    replace(/[^A-Za-z0-9_\-]/g, "");
+
+const validate = contract({
+  title: {
+    is: ["string"],
+    ok: x => x.length > 0,
+    msg: "The `option.title` string must be provided"
+  },
+  items: {
+    is:["undefined", "object", "array"],
+    msg: "The `options.items` must be iterable sequence of items"
+  },
+  hidden: {
+    is: ["boolean", "undefined"],
+    msg: "The `options.hidden` must be boolean"
+  }
+});
+
+// Toolbars is a mapping between `toolbar.id` & `toolbar` instances,
+// which is used to find intstance for dispatching events.
+var toolbars = new Map();
+
+const Toolbar = Class({
+  extends: EventTarget,
+  implements: [Disposable],
+  initialize: function(params={}) {
+    const options = validate(params);
+    const id = titleToId(options.title);
+
+    if (toolbars.has(id))
+      throw Error("Toolbar with this id already exists: " + id);
+
+    // Set of the items in the toolbar isn't mutable, as a matter of fact
+    // it just defines desired set of items, actual set is under users
+    // control. Conver test to an array and freeze to make sure users won't
+    // try mess with it.
+    const items = Object.freeze(options.items ? [...options.items] : []);
+
+    const initial = {
+      id: id,
+      title: options.title,
+      // By default toolbars are visible when add-on is installed, unless
+      // add-on authors decides it should be hidden. From that point on
+      // user is in control.
+      collapsed: !!options.hidden,
+      // In terms of state only identifiers of items matter.
+      items: items.map(identify)
+    };
+
+    this.id = id;
+    this.items = items;
+
+    toolbars.set(id, this);
+    setListeners(this, params);
+
+    // Send initial state to the host so it can reflect it
+    // into a user interface.
+    send(output, object([id, initial]));
+  },
+
+  get title() {
+    const state = reactor.value[this.id];
+    return state && state.title;
+  },
+  get hidden() {
+    const state = reactor.value[this.id];
+    return state && state.collapsed;
+  },
+
+  destroy: function() {
+    send(output, object([this.id, null]));
+  },
+  // `JSON.stringify` serializes objects based of the return
+  // value of this method. For convinienc we provide this method
+  // to serialize actual state data. Note: items will also be
+  // serialized so they should probably implement `toJSON`.
+  toJSON: function() {
+    return {
+      id: this.id,
+      title: this.title,
+      hidden: this.hidden,
+      items: this.items
+    };
+  }
+});
+exports.Toolbar = Toolbar;
+identify.define(Toolbar, toolbar => toolbar.id);
+
+const dispose = toolbar => {
+  toolbars.delete(toolbar.id);
+  emit(toolbar, "detach");
+  off(toolbar);
+};
+
+const reactor = new Reactor({
+  onStep: (present, past) => {
+    const delta = diff(past, present);
+
+    each(([id, update]) => {
+      const toolbar = toolbars.get(id);
+
+      // Remove
+      if (!update)
+        dispose(toolbar);
+      // Add
+      else if (!past[id])
+        emit(toolbar, "attach");
+      // Update
+      else
+        emit(toolbar, update.collapsed ? "hide" : "show", toolbar);
+    }, pairs(delta));
+  }
+});
+reactor.run(input);
diff --git a/toolkit/jetpack/sdk/ui/toolbar/view.js b/toolkit/jetpack/sdk/ui/toolbar/view.js
new file mode 100644
index 000000000..4ef0c3d46
--- /dev/null
+++ b/toolkit/jetpack/sdk/ui/toolbar/view.js
@@ -0,0 +1,248 @@
+/* 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": "experimental",
+  "engines": {
+    "Firefox": "> 28"
+  }
+};
+
+const { Cu } = require("chrome");
+const { CustomizableUI } = Cu.import('resource:///modules/CustomizableUI.jsm', {});
+const { subscribe, send, Reactor, foldp, lift, merges } = require("../../event/utils");
+const { InputPort } = require("../../input/system");
+const { OutputPort } = require("../../output/system");
+const { Interactive } = require("../../input/browser");
+const { CustomizationInput } = require("../../input/customizable-ui");
+const { pairs, map, isEmpty, object,
+        each, keys, values } = require("../../util/sequence");
+const { curry, flip } = require("../../lang/functional");
+const { patch, diff } = require("diffpatcher/index");
+const prefs = require("../../preferences/service");
+const { getByOuterId } = require("../../window/utils");
+const { ignoreWindow } = require('../../private-browsing/utils');
+
+const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
+const PREF_ROOT = "extensions.sdk-toolbar-collapsed.";
+
+
+// There are two output ports one for publishing changes that occured
+// and the other for change requests. Later is synchronous and is only
+// consumed here. Note: it needs to be synchronous to avoid race conditions
+// when `collapsed` attribute changes are caused by user interaction and
+// toolbar is destroyed between the ticks.
+const output = new OutputPort({ id: "toolbar-changed" });
+const syncoutput = new OutputPort({ id: "toolbar-change", sync: true });
+
+// Merge disptached changes and recevied changes from models to keep state up to
+// date.
+const Toolbars = foldp(patch, {}, merges([new InputPort({ id: "toolbar-changed" }),
+                                          new InputPort({ id: "toolbar-change" })]));
+const State = lift((toolbars, windows, customizable) =>
+  ({windows: windows, toolbars: toolbars, customizable: customizable}),
+  Toolbars, Interactive, new CustomizationInput());
+
+// Shared event handler that makes `event.target.parent` collapsed.
+// Used as toolbar's close buttons click handler.
+const collapseToolbar = event => {
+  const toolbar = event.target.parentNode;
+  toolbar.collapsed = true;
+};
+
+const parseAttribute = x =>
+  x === "true" ? true :
+  x === "false" ? false :
+  x === "" ? null :
+  x;
+
+// Shared mutation observer that is used to observe `toolbar` node's
+// attribute mutations. Mutations are aggregated in the `delta` hash
+// and send to `ToolbarStateChanged` channel to let model know state
+// has changed.
+const attributesChanged = mutations => {
+  const delta = mutations.reduce((changes, {attributeName, target}) => {
+    const id = target.id;
+    const field = attributeName === "toolbarname" ? "title" : attributeName;
+    let change = changes[id] || (changes[id] = {});
+    change[field] = parseAttribute(target.getAttribute(attributeName));
+    return changes;
+  }, {});
+
+  // Calculate what are the updates from the current state and if there are
+  // any send them.
+  const updates = diff(reactor.value, patch(reactor.value, delta));
+
+  if (!isEmpty(pairs(updates))) {
+    // TODO: Consider sending sync to make sure that there won't be a new
+    // update doing a delete in the meantime.
+    send(syncoutput, updates);
+  }
+};
+
+
+// Utility function creates `toolbar` with a "close" button and returns
+// it back. In addition it set's up a listener and observer to communicate
+// state changes.
+const addView = curry((options, {document, window}) => {
+  if (ignoreWindow(window))
+    return;
+
+  let view = document.createElementNS(XUL_NS, "toolbar");
+  view.setAttribute("id", options.id);
+  view.setAttribute("collapsed", options.collapsed);
+  view.setAttribute("toolbarname", options.title);
+  view.setAttribute("pack", "end");
+  view.setAttribute("customizable", "false");
+  view.setAttribute("style", "padding: 2px 0; max-height: 40px;");
+  view.setAttribute("mode", "icons");
+  view.setAttribute("iconsize", "small");
+  view.setAttribute("context", "toolbar-context-menu");
+  view.setAttribute("class", "chromeclass-toolbar");
+
+  let label = document.createElementNS(XUL_NS, "label");
+  label.setAttribute("value", options.title);
+  label.setAttribute("collapsed", "true");
+  view.appendChild(label);
+
+  let closeButton = document.createElementNS(XUL_NS, "toolbarbutton");
+  closeButton.setAttribute("id", "close-" + options.id);
+  closeButton.setAttribute("class", "close-icon");
+  closeButton.setAttribute("customizable", false);
+  closeButton.addEventListener("command", collapseToolbar);
+
+  view.appendChild(closeButton);
+
+  // In order to have a close button not costumizable, aligned on the right,
+  // leaving the customizable capabilities of Australis, we need to create
+  // a toolbar inside a toolbar.
+  // This is should be a temporary hack, we should have a proper XBL for toolbar
+  // instead. See:
+  // https://bugzilla.mozilla.org/show_bug.cgi?id=982005
+  let toolbar = document.createElementNS(XUL_NS, "toolbar");
+  toolbar.setAttribute("id", "inner-" + options.id);
+  toolbar.setAttribute("defaultset", options.items.join(","));
+  toolbar.setAttribute("customizable", "true");
+  toolbar.setAttribute("style", "-moz-appearance: none; overflow: hidden");
+  toolbar.setAttribute("mode", "icons");
+  toolbar.setAttribute("iconsize", "small");
+  toolbar.setAttribute("context", "toolbar-context-menu");
+  toolbar.setAttribute("flex", "1");
+
+  view.insertBefore(toolbar, closeButton);
+
+  const observer = new document.defaultView.MutationObserver(attributesChanged);
+  observer.observe(view, { attributes: true,
+                           attributeFilter: ["collapsed", "toolbarname"] });
+
+  const toolbox = document.getElementById("navigator-toolbox");
+  toolbox.appendChild(view);
+});
+const viewAdd = curry(flip(addView));
+
+const removeView = curry((id, {document}) => {
+  const view = document.getElementById(id);
+  if (view) view.remove();
+});
+
+const updateView = curry((id, {title, collapsed, isCustomizing}, {document}) => {
+  const view = document.getElementById(id);
+
+  if (!view)
+    return;
+
+  if (title)
+    view.setAttribute("toolbarname", title);
+
+  if (collapsed !== void(0))
+    view.setAttribute("collapsed", Boolean(collapsed));
+
+  if (isCustomizing !== void(0)) {
+    view.querySelector("label").collapsed = !isCustomizing;
+    view.querySelector("toolbar").style.visibility = isCustomizing
+                                                ? "hidden" : "visible";
+  }
+});
+
+const viewUpdate = curry(flip(updateView));
+
+// Utility function used to register toolbar into CustomizableUI.
+const registerToolbar = state => {
+  // If it's first additon register toolbar as customizableUI component.
+  CustomizableUI.registerArea("inner-" + state.id, {
+    type: CustomizableUI.TYPE_TOOLBAR,
+    legacy: true,
+    defaultPlacements: [...state.items]
+  });
+};
+// Utility function used to unregister toolbar from the CustomizableUI.
+const unregisterToolbar = CustomizableUI.unregisterArea;
+
+const reactor = new Reactor({
+  onStep: (present, past) => {
+    const delta = diff(past, present);
+
+    each(([id, update]) => {
+      // If update is `null` toolbar is removed, in such case
+      // we unregister toolbar and remove it from each window
+      // it was added to.
+      if (update === null) {
+        unregisterToolbar("inner-" + id);
+        each(removeView(id), values(past.windows));
+
+        send(output, object([id, null]));
+      }
+      else if (past.toolbars[id]) {
+        // If `collapsed` state for toolbar was updated, persist
+        // it for a future sessions.
+        if (update.collapsed !== void(0))
+          prefs.set(PREF_ROOT + id, update.collapsed);
+
+        // Reflect update in each window it was added to.
+        each(updateView(id, update), values(past.windows));
+
+        send(output, object([id, update]));
+      }
+      // Hack: Mutation observers are invoked async, which means that if
+      // client does `hide(toolbar)` & then `toolbar.destroy()` by the
+      // time we'll get update for `collapsed` toolbar will be removed.
+      // For now we check if `update.id` is present which will be undefined
+      // in such cases.
+      else if (update.id) {
+        // If it is a new toolbar we create initial state by overriding
+        // `collapsed` filed with value persisted in previous sessions.
+        const state = patch(update, {
+          collapsed: prefs.get(PREF_ROOT + id, update.collapsed),
+        });
+
+        // Register toolbar and add it each window known in the past
+        // (note that new windows if any will be handled in loop below).
+        registerToolbar(state);
+        each(addView(state), values(past.windows));
+
+        send(output, object([state.id, state]));
+      }
+    }, pairs(delta.toolbars));
+
+    // Add views to every window that was added.
+    each(window => {
+      if (window)
+        each(viewAdd(window), values(past.toolbars));
+    }, values(delta.windows));
+
+    each(([id, isCustomizing]) => {
+      each(viewUpdate(getByOuterId(id), {isCustomizing: !!isCustomizing}),
+        keys(present.toolbars));
+
+    }, pairs(delta.customizable))
+  },
+  onEnd: state => {
+    each(id => {
+      unregisterToolbar("inner-" + id);
+      each(removeView(id), values(state.windows));
+    }, keys(state.toolbars));
+  }
+});
+reactor.run(State);