1 files changed, 150 insertions, 0 deletions
diff --git a/addon-sdk/source/lib/sdk/ui/frame/view.js b/addon-sdk/source/lib/sdk/ui/frame/view.js
new file mode 100644
index 000000000..2eb4df2b7
--- /dev/null
+++ b/addon-sdk/source/lib/sdk/ui/frame/view.js
@@ -0,0 +1,150 @@
+/* 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, Ci } = require("chrome");
+const { CustomizableUI } = Cu.import('resource:///modules/CustomizableUI.jsm', {});
+const { subscribe, send, Reactor, foldp, lift, merges, keepIf } = require("../../event/utils");
+const { InputPort } = require("../../input/system");
+const { OutputPort } = require("../../output/system");
+const { LastClosed } = require("../../input/browser");
+const { pairs, keys, object, each } = require("../../util/sequence");
+const { curry, compose } = require("../../lang/functional");
+const { getFrameElement, getOuterId,
+        getByOuterId, getOwnerBrowserWindow } = require("../../window/utils");
+const { patch, diff } = require("diffpatcher/index");
+const { encode } = require("../../base64");
+const { Frames } = require("../../input/frame");
+
+const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
+const HTML_NS = "http://www.w3.org/1999/xhtml";
+const OUTER_FRAME_URI = module.uri.replace(/\.js$/, ".html");
+
+const mailbox = new OutputPort({ id: "frame-mailbox" });
+
+const frameID = frame => frame.id.replace("outer-", "");
+const windowID = compose(getOuterId, getOwnerBrowserWindow);
+
+const getOuterFrame = (windowID, frameID) =>
+    getByOuterId(windowID).document.getElementById("outer-" + frameID);
+
+const listener = ({target, source, data, origin, timeStamp}) => {
+  // And sent received message to outbox so that frame API model
+  // will deal with it.
+  if (source && source !== target) {
+    const frame = getFrameElement(target);
+    const id = frameID(frame);
+    send(mailbox, object([id, {
+      outbox: {type: "message",
+               source: {id: id, ownerID: windowID(frame)},
+               data: data,
+               origin: origin,
+               timeStamp: timeStamp}}]));
+  }
+};
+
+// Utility function used to create frame with a given `state` and
+// inject it into given `window`.
+const registerFrame = ({id, url}) => {
+  CustomizableUI.createWidget({
+    id: id,
+    type: "custom",
+    removable: true,
+    onBuild: document => {
+      let view = document.createElementNS(XUL_NS, "toolbaritem");
+      view.setAttribute("id", id);
+      view.setAttribute("flex", 2);
+
+      let outerFrame = document.createElementNS(XUL_NS, "iframe");
+      outerFrame.setAttribute("src", OUTER_FRAME_URI);
+      outerFrame.setAttribute("id", "outer-" + id);
+      outerFrame.setAttribute("data-is-sdk-outer-frame", true);
+      outerFrame.setAttribute("type", "content");
+      outerFrame.setAttribute("transparent", true);
+      outerFrame.setAttribute("flex", 2);
+      outerFrame.setAttribute("style", "overflow: hidden;");
+      outerFrame.setAttribute("scrolling", "no");
+      outerFrame.setAttribute("disablehistory", true);
+      outerFrame.setAttribute("seamless", "seamless");
+      outerFrame.addEventListener("load", function onload() {
+        outerFrame.removeEventListener("load", onload, true);
+
+        let doc = outerFrame.contentDocument;
+
+        let innerFrame = doc.createElementNS(HTML_NS, "iframe");
+        innerFrame.setAttribute("id", id);
+        innerFrame.setAttribute("src", url);
+        innerFrame.setAttribute("seamless", "seamless");
+        innerFrame.setAttribute("sandbox", "allow-scripts");
+        innerFrame.setAttribute("scrolling", "no");
+        innerFrame.setAttribute("data-is-sdk-inner-frame", true);
+        innerFrame.setAttribute("style", [ "border:none",
+          "position:absolute", "width:100%", "top: 0",
+          "left: 0", "overflow: hidden"].join(";"));
+
+        doc.body.appendChild(innerFrame);
+      }, true);
+
+      view.appendChild(outerFrame);
+
+      return view;
+    }
+  });
+};
+
+const unregisterFrame = CustomizableUI.destroyWidget;
+
+const deliverMessage = curry((frameID, data, windowID) => {
+  const frame = getOuterFrame(windowID, frameID);
+  const content = frame && frame.contentWindow;
+
+  if (content)
+    content.postMessage(data, content.location.origin);
+});
+
+const updateFrame = (id, {inbox, owners}, present) => {
+  if (inbox) {
+    const { data, target:{ownerID}, source } = present[id].inbox;
+    if (ownerID)
+      deliverMessage(id, data, ownerID);
+    else
+      each(deliverMessage(id, data), keys(present[id].owners));
+  }
+
+  each(setupView(id), pairs(owners));
+};
+
+const setupView = curry((frameID, [windowID, state]) => {
+  if (state && state.readyState === "loading") {
+    const frame = getOuterFrame(windowID, frameID);
+    // Setup a message listener on contentWindow.
+    frame.contentWindow.addEventListener("message", listener);
+  }
+});
+
+
+const reactor = new Reactor({
+  onStep: (present, past) => {
+    const delta = diff(past, present);
+
+    // Apply frame changes
+    each(([id, update]) => {
+      if (update === null)
+        unregisterFrame(id);
+      else if (past[id])
+        updateFrame(id, update, present);
+      else
+        registerFrame(update);
+    }, pairs(delta));
+  },
+  onEnd: state => each(unregisterFrame, keys(state))
+});
+reactor.run(Frames);