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/* 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);
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