1 files changed, 85 insertions, 0 deletions
diff --git a/toolkit/jetpack/sdk/input/frame.js b/toolkit/jetpack/sdk/input/frame.js
new file mode 100644
index 000000000..50efaa745
--- /dev/null
+++ b/toolkit/jetpack/sdk/input/frame.js
@@ -0,0 +1,85 @@
+/* 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";
+
+const { Ci } = require("chrome");
+const { InputPort } = require("./system");
+const { getFrameElement, getOuterId,
+        getOwnerBrowserWindow } = require("../window/utils");
+const { isnt } = require("../lang/functional");
+const { foldp, lift, merges, keepIf } = require("../event/utils");
+const { object } = require("../util/sequence");
+const { compose } = require("../lang/functional");
+const { LastClosed } = require("./browser");
+const { patch } = require("diffpatcher/index");
+
+const Document = Ci.nsIDOMDocument;
+
+const isntNull = isnt(null);
+
+const frameID = frame => frame.id;
+const browserID = compose(getOuterId, getOwnerBrowserWindow);
+
+const isInnerFrame = frame =>
+  frame && frame.hasAttribute("data-is-sdk-inner-frame");
+
+// Utility function that given content window loaded in our frame views returns
+// an actual frame. This basically takes care of fact that actual frame document
+// is loaded in the nested iframe. If content window is not loaded in the nested
+// frame of the frame view it returs null.
+const getFrame = document =>
+  document && document.defaultView && getFrameElement(document.defaultView);
+
+const FrameInput = function(options) {
+  const input = keepIf(isInnerFrame, null,
+                       lift(getFrame, new InputPort(options)));
+  return lift(frame => {
+    if (!frame) return frame;
+    const [id, owner] = [frameID(frame), browserID(frame)];
+    return object([id, {owners: object([owner, options.update])}]);
+  }, input);
+};
+
+const LastLoading = new FrameInput({topic: "document-element-inserted",
+                                    update: {readyState: "loading"}});
+exports.LastLoading = LastLoading;
+
+const LastInteractive = new FrameInput({topic: "content-document-interactive",
+                                        update: {readyState: "interactive"}});
+exports.LastInteractive = LastInteractive;
+
+const LastLoaded = new FrameInput({topic: "content-document-loaded",
+                                   update: {readyState: "complete"}});
+exports.LastLoaded = LastLoaded;
+
+const LastUnloaded = new FrameInput({topic: "content-page-hidden",
+                                    update: null});
+exports.LastUnloaded = LastUnloaded;
+
+// Represents state of SDK frames in form of data structure:
+// {"frame#1": {"id": "frame#1",
+//              "inbox": {"data": "ping",
+//                        "target": {"id": "frame#1", "owner": "outerWindowID#2"},
+//                        "source": {"id": "frame#1"}}
+//              "url": "resource://addon-1/data/index.html",
+//              "owners": {"outerWindowID#1": {"readyState": "loading"},
+//                         "outerWindowID#2": {"readyState": "complete"}}
+//
+//
+//  frame#2: {"id": "frame#2",
+//            "url": "resource://addon-1/data/main.html",
+//            "outbox": {"data": "pong",
+//                       "source": {"id": "frame#2", "owner": "outerWindowID#1"}
+//                       "target": {"id": "frame#2"}}
+//            "owners": {outerWindowID#1: {readyState: "interacitve"}}}}
+const Frames = foldp(patch, {}, merges([
+  LastLoading,
+  LastInteractive,
+  LastLoaded,
+  LastUnloaded,
+  new InputPort({ id: "frame-mailbox" }),
+  new InputPort({ id: "frame-change" }),
+  new InputPort({ id: "frame-changed" })
+]));
+exports.Frames = Frames;