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browser.js
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browser.js
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(function (window) {
// Browser client library for interfacing with the Node.js reloader server
// library/system (see ext/reload/server.js).
var Reloader = function (dy) {
this.dy = dy
}
var getReloadables = function (reloader) {
var req = new XMLHttpRequest(),
async = false
req.onload = function () {
var data = this.responseText
reloader.reloadables = JSON.parse(data).reloadables
}
req.open('GET', '/.dy/reloadables.json', async)
req.send()
}
Reloader.prototype.setup = function () {
var reloader = this
getReloadables(this)
this.primus = Primus.connect()
this.primus.on('data', this.getMessageHandler())
}
Reloader.prototype.onModuleChanged = function (name) {
var module = this.dy.modules[name]
var spec = this.reloadables.filter(function (r) {
return r.name === name
})[0]
if (spec === null) {
console.log('Unable to find module to reload named: '+name)
return
}
// First trigger the unload
if (typeof module._unload === 'function') {
module._unload()
}
// Then load the new version through the DOM
var script = document.createElement('script')
script.type = 'text/javascript'
var url = spec.reload,
now = (new Date()).getTime()
// Add the current time to the URL to ensure the browser loads it.
if (url.indexOf('?') === -1) {
url += '?'+now
} else {
url += '&'+now
}
script.src = url
script.onload = function () {
// Then trigger the load
if (typeof module._load === 'function') {
module._load()
}
}
console.log('Reloading '+name)
// Finally add it to the DOM
var head = document.getElementsByTagName('head')[0]
head.appendChild(script)
}
// Received an event from the websocket.
Reloader.prototype.onData = function (data) {
if (data.event === 'changed') {
this.onModuleChanged(data.name)
}
}
// Returns a handler that forwards messages to Reloader#onData.
Reloader.prototype.getMessageHandler = function () {
var reloader = this
return function message(data) {
reloader.onData.call(reloader, data)
}
}
if (window) {
window.dy.Reloader = Reloader
}
})(window);