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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
'use strict';
/*
Allow web apps to inject a tiny persistent background iframe
as the phone starts.
*/
var BackgroundServiceManager = (function bsm() {
/* We keep the references to background page iframes here.
The iframes will be append to body */
var frames = {};
/* The name of the background window open by background_page in
manifest. */
var AUTO_OPEN_BG_PAGE_NAME = 'background';
/* Init */
var init = function bsm_init() {
var applications = Applications.installedApps;
Object.keys(applications).forEach(function bsm_each(manifestURL) {
var app = applications[manifestURL];
if (!app.manifest.background_page)
return;
// XXX: this work as if background_page is always a path not a full URL.
var url = app.origin + app.manifest.background_page;
open(manifestURL, AUTO_OPEN_BG_PAGE_NAME, url);
});
};
/* mozbrowseropenwindow */
window.addEventListener('mozbrowseropenwindow', function bsm_winopen(evt) {
if (evt.detail.features !== 'background')
return;
// stopPropagation means we are not allowing
// Popup Manager to handle this event
evt.stopPropagation();
var manifestURL = evt.target.getAttribute('mozapp');
var detail = evt.detail;
open(manifestURL, detail.name, detail.url, detail.frameElement);
}, true);
/* mozbrowserclose */
window.addEventListener('mozbrowserclose', function bsm_winclose(evt) {
if (!'frameType' in evt.target.dataset ||
evt.target.dataset.frameType !== 'background')
return;
var manifestURL = evt.target.getAttribute('mozapp');
close(manifestURL, evt.target.dataset.frameName);
}, true);
/* mozbrowsererror */
window.addEventListener('mozbrowsererror', function bsm_winclose(evt) {
if (!'frameType' in evt.target.dataset ||
evt.target.dataset.frameType !== 'background' ||
evt.detail.type !== 'fatal')
return;
var target = evt.target;
var manifestURL = target.getAttribute('mozapp');
// This bg service has just crashed, clean up the frame
var name = target.dataset.frameName;
close(manifestURL, name);
}, true);
/* OnInstall */
window.addEventListener('applicationinstall', function bsm_oninstall(evt) {
var app = evt.detail.application;
var origin = app.origin;
if (!app.manifest.background_page)
return;
// XXX: this work as if background_page is always a path not a full URL.
var url = origin + app.manifest.background_page;
open(manifestURL, AUTO_OPEN_BG_PAGE_NAME, url);
});
/* OnUninstall */
window.addEventListener('applicationuninstall', function bsm_oninstall(evt) {
var app = evt.detail.application;
close(app.manifestURL);
});
/* Check if the app has the permission to open a background page */
var hasBackgroundPermission = function bsm_checkPermssion(app) {
var mozPerms = navigator.mozPermissionSettings;
if (!mozPerms)
return false;
var value = mozPerms.get('backgroundservice', app.manifestURL,
app.origin, false);
return (value === 'allow');
};
/* The open function is responsible of containing the iframe */
var open = function bsm_open(manifestURL, name, url, frame) {
var app = Applications.getByManifestURL(manifestURL);
if (!app || !hasBackgroundPermission(app))
return false;
if (frames[manifestURL] && frames[manifestURL][name]) {
console.error('Window with the same name is there but Gecko ' +
' failed to use it. See bug 766873. origin: "' + origin +
'", name: "' + name + '".');
return false;
}
if (!frame) {
frame = document.createElement('iframe');
// If we have a frame element, it's provided by mozbrowseropenwindow, and
// it has the mozbrowser, mozapp, and src attributes set already.
frame.setAttribute('mozbrowser', 'mozbrowser');
frame.setAttribute('mozapp', manifestURL);
frame.setAttribute('name', name);
var appName = app.manifest.name;
frame.setAttribute('remote', 'true');
console.info('%%%%% Launching', appName, 'bg service as remote (OOP)');
frame.src = url;
}
frame.className = 'backgroundWindow';
frame.dataset.frameType = 'background';
frame.dataset.frameName = name;
if (!frames[manifestURL])
frames[manifestURL] = {};
frames[manifestURL][name] = frame;
document.body.appendChild(frame);
// Background services should load in the background.
//
// (The funky setTimeout(0) is to work around
// https://bugzilla.mozilla.org/show_bug.cgi?id=810431 .)
setTimeout(function() { frame.setVisible(false) }, 0);
return true;
};
/* The close function will remove the iframe from DOM and
delete the reference */
var close = function bsm_close(manifestURL, name) {
if (!frames[manifestURL])
return false;
if (typeof name == 'undefined') {
// Close all windows
Object.keys(frames[manifestURL]).forEach(function closeEach(name) {
document.body.removeChild(frames[manifestURL][name]);
frames[manifestURL][name] = null;
});
delete frames[manifestURL];
return true;
}
// Close one window
var frame = frames[manifestURL][name];
if (!frame)
return false;
document.body.removeChild(frame);
delete frames[manifestURL][name];
if (!Object.keys(frames[manifestURL]).length)
delete frames[manifestURL];
return true;
};
/* start initialization */
if (Applications.ready) {
init();
} else {
window.addEventListener('applicationready',
function bsm_appListReady(event) {
window.removeEventListener('applicationready', bsm_appListReady);
init();
});
}
/* Return the public APIs */
return {
'open': open,
'close': close
};
}());
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