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;(function() {
"use strict"
function Vnode(tag, key, attrs0, children0, text, dom) {
return {tag: tag, key: key, attrs: attrs0, children: children0, text: text, dom: dom, domSize: undefined, state: undefined, events: undefined, instance: undefined}
}
Vnode.normalize = function(node) {
if (Array.isArray(node)) return Vnode("[", undefined, undefined, Vnode.normalizeChildren(node), undefined, undefined)
if (node != null && typeof node !== "object") return Vnode("#", undefined, undefined, node === false ? "" : node, undefined, undefined)
return node
}
Vnode.normalizeChildren = function(input) {
var children0 = []
for (var i = 0; i < input.length; i++) {
children0[i] = Vnode.normalize(input[i])
}
return children0
}
// Call via `hyperscriptVnode0.apply(startOffset, arguments)`
//
// The reason I do it this way, forwarding the arguments and passing the start
// offset in `this`, is so I don't have to create a temporary array in a
// performance-critical path.
//
// In native ES6, I'd instead add a final `...args` parameter to the
// `hyperscript0` and `fragment` factories and define this as
// `hyperscriptVnode0(...args)`, since modern engines do optimize that away. But
// ES5 (what Mithril requires thanks to IE support) doesn't give me that luxury,
// and engines aren't nearly intelligent enough to do either of these:
//
// 1. Elide the allocation for `[].slice.call(arguments, 1)` when it's passed to
// another function only to be indexed.
// 2. Elide an `arguments` allocation when it's passed to any function other
// than `Function.prototype.apply` or `Reflect.apply`.
//
// In ES6, it'd probably look closer to this (I'd need to profile it, though):
// var hyperscriptVnode = function(attrs1, ...children1) {
// if (attrs1 == null || typeof attrs1 === "object" && attrs1.tag == null && !Array.isArray(attrs1)) {
// if (children1.length === 1 && Array.isArray(children1[0])) children1 = children1[0]
// } else {
// children1 = children1.length === 0 && Array.isArray(attrs1) ? attrs1 : [attrs1, ...children1]
// attrs1 = undefined
// }
//
// if (attrs1 == null) attrs1 = {}
// return Vnode("", attrs1.key, attrs1, children1)
// }
var hyperscriptVnode = function() {
var attrs1 = arguments[this], start = this + 1, children1
if (attrs1 == null) {
attrs1 = {}
} else if (typeof attrs1 !== "object" || attrs1.tag != null || Array.isArray(attrs1)) {
attrs1 = {}
start = this
}
if (arguments.length === start + 1) {
children1 = arguments[start]
if (!Array.isArray(children1)) children1 = [children1]
} else {
children1 = []
while (start < arguments.length) children1.push(arguments[start++])
}
return Vnode("", attrs1.key, attrs1, children1)
}
var selectorParser = /(?:(^|#|\.)([^#\.\[\]]+))|(\[(.+?)(?:\s*=\s*("|'|)((?:\\["'\]]|.)*?)\5)?\])/g
var selectorCache = {}
var hasOwn = {}.hasOwnProperty
function isEmpty(object) {
for (var key in object) if (hasOwn.call(object, key)) return false
return true
}
function compileSelector(selector) {
var match, tag = "div", classes = [], attrs = {}
while (match = selectorParser.exec(selector)) {
var type = match[1], value = match[2]
if (type === "" && value !== "") tag = value
else if (type === "#") attrs.id = value
else if (type === ".") classes.push(value)
else if (match[3][0] === "[") {
var attrValue = match[6]
if (attrValue) attrValue = attrValue.replace(/\\(["'])/g, "$1").replace(/\\\\/g, "\\")
if (match[4] === "class") classes.push(attrValue)
else attrs[match[4]] = attrValue === "" ? attrValue : attrValue || true
}
}
if (classes.length > 0) attrs.className = classes.join(" ")
return selectorCache[selector] = {tag: tag, attrs: attrs}
}
function execSelector(state, vnode) {
var attrs = vnode.attrs
var children = Vnode.normalizeChildren(vnode.children)
var hasClass = hasOwn.call(attrs, "class")
var className = hasClass ? attrs.class : attrs.className
vnode.tag = state.tag
vnode.attrs = null
vnode.children = undefined
if (!isEmpty(state.attrs) && !isEmpty(attrs)) {
var newAttrs = {}
for (var key in attrs) {
if (hasOwn.call(attrs, key)) newAttrs[key] = attrs[key]
}
attrs = newAttrs
}
for (var key in state.attrs) {
if (hasOwn.call(state.attrs, key) && key !== "className" && !hasOwn.call(attrs, key)){
attrs[key] = state.attrs[key]
}
}
if (className != null || state.attrs.className != null) attrs.className =
className != null
? state.attrs.className != null
? String(state.attrs.className) + " " + String(className)
: className
: state.attrs.className != null
? state.attrs.className
: null
if (hasClass) attrs.class = null
for (var key in attrs) {
if (hasOwn.call(attrs, key) && key !== "key") {
vnode.attrs = attrs
break
}
}
if (Array.isArray(children) && children.length === 1 && children[0] != null && children[0].tag === "#") {
vnode.text = children[0].children
} else {
vnode.children = children
}
return vnode
}
function hyperscript(selector) {
if (selector == null || typeof selector !== "string" && typeof selector !== "function" && typeof selector.view !== "function") {
throw Error("The selector must be either a string or a component.");
}
var vnode = hyperscriptVnode.apply(1, arguments)
if (typeof selector === "string") {
vnode.children = Vnode.normalizeChildren(vnode.children)
if (selector !== "[") return execSelector(selectorCache[selector] || compileSelector(selector), vnode)
}
vnode.tag = selector
return vnode
}
hyperscript.trust = function(html) {
if (html == null) html = ""
return Vnode("<", undefined, undefined, html, undefined, undefined)
}
hyperscript.fragment = function() {
var vnode2 = hyperscriptVnode.apply(0, arguments)
vnode2.tag = "["
vnode2.children = Vnode.normalizeChildren(vnode2.children)
return vnode2
}
var m = function m() { return hyperscript.apply(this, arguments) }
m.m = hyperscript
m.trust = hyperscript.trust
m.fragment = hyperscript.fragment
/** @constructor */
var PromisePolyfill = function(executor) {
if (!(this instanceof PromisePolyfill)) throw new Error("Promise must be called with `new`")
if (typeof executor !== "function") throw new TypeError("executor must be a function")
var self = this, resolvers = [], rejectors = [], resolveCurrent = handler(resolvers, true), rejectCurrent = handler(rejectors, false)
var instance = self._instance = {resolvers: resolvers, rejectors: rejectors}
var callAsync = typeof setImmediate === "function" ? setImmediate : setTimeout
function handler(list, shouldAbsorb) {
return function execute(value) {
var then
try {
if (shouldAbsorb && value != null && (typeof value === "object" || typeof value === "function") && typeof (then = value.then) === "function") {
if (value === self) throw new TypeError("Promise can't be resolved w/ itself")
executeOnce(then.bind(value))
}
else {
callAsync(function() {
if (!shouldAbsorb && list.length === 0) console.error("Possible unhandled promise rejection:", value)
for (var i = 0; i < list.length; i++) list[i](value)
resolvers.length = 0, rejectors.length = 0
instance.state = shouldAbsorb
instance.retry = function() {execute(value)}
})
}
}
catch (e) {
rejectCurrent(e)
}
}
}
function executeOnce(then) {
var runs = 0
function run(fn) {
return function(value) {
if (runs++ > 0) return
fn(value)
}
}
var onerror = run(rejectCurrent)
try {then(run(resolveCurrent), onerror)} catch (e) {onerror(e)}
}
executeOnce(executor)
}
PromisePolyfill.prototype.then = function(onFulfilled, onRejection) {
var self = this, instance = self._instance
function handle(callback, list, next, state) {
list.push(function(value) {
if (typeof callback !== "function") next(value)
else try {resolveNext(callback(value))} catch (e) {if (rejectNext) rejectNext(e)}
})
if (typeof instance.retry === "function" && state === instance.state) instance.retry()
}
var resolveNext, rejectNext
var promise = new PromisePolyfill(function(resolve, reject) {resolveNext = resolve, rejectNext = reject})
handle(onFulfilled, instance.resolvers, resolveNext, true), handle(onRejection, instance.rejectors, rejectNext, false)
return promise
}
PromisePolyfill.prototype.catch = function(onRejection) {
return this.then(null, onRejection)
}
PromisePolyfill.prototype.finally = function(callback) {
return this.then(
function(value) {
return PromisePolyfill.resolve(callback()).then(function() {
return value
})
},
function(reason) {
return PromisePolyfill.resolve(callback()).then(function() {
return PromisePolyfill.reject(reason);
})
}
)
}
PromisePolyfill.resolve = function(value) {
if (value instanceof PromisePolyfill) return value
return new PromisePolyfill(function(resolve) {resolve(value)})
}
PromisePolyfill.reject = function(value) {
return new PromisePolyfill(function(resolve, reject) {reject(value)})
}
PromisePolyfill.all = function(list) {
return new PromisePolyfill(function(resolve, reject) {
var total = list.length, count = 0, values = []
if (list.length === 0) resolve([])
else for (var i = 0; i < list.length; i++) {
(function(i) {
function consume(value) {
count++
values[i] = value
if (count === total) resolve(values)
}
if (list[i] != null && (typeof list[i] === "object" || typeof list[i] === "function") && typeof list[i].then === "function") {
list[i].then(consume, reject)
}
else consume(list[i])
})(i)
}
})
}
PromisePolyfill.race = function(list) {
return new PromisePolyfill(function(resolve, reject) {
for (var i = 0; i < list.length; i++) {
list[i].then(resolve, reject)
}
})
}
if (typeof window !== "undefined") {
if (typeof window.Promise === "undefined") {
window.Promise = PromisePolyfill
} else if (!window.Promise.prototype.finally) {
window.Promise.prototype.finally = PromisePolyfill.prototype.finally
}
var PromisePolyfill = window.Promise
} else if (typeof global !== "undefined") {
if (typeof global.Promise === "undefined") {
global.Promise = PromisePolyfill
} else if (!global.Promise.prototype.finally) {
global.Promise.prototype.finally = PromisePolyfill.prototype.finally
}
var PromisePolyfill = global.Promise
} else {
}
var buildQueryString = function(object) {
if (Object.prototype.toString.call(object) !== "[object Object]") return ""
var args = []
for (var key in object) {
destructure(key, object[key])
}
return args.join("&")
function destructure(key, value) {
if (Array.isArray(value)) {
for (var i = 0; i < value.length; i++) {
destructure(key + "[" + i + "]", value[i])
}
}
else if (Object.prototype.toString.call(value) === "[object Object]") {
for (var i in value) {
destructure(key + "[" + i + "]", value[i])
}
}
else args.push(encodeURIComponent(key) + (value != null && value !== "" ? "=" + encodeURIComponent(value) : ""))
}
}
var assign = Object.assign || function(target, source) {
Object.keys(source).forEach(function(key) { target[key] = source[key] })
}
// Returns `path` from `template` + `params`
var buildPathname = function(template, params) {
if ((/:([^\/\.-]+)(\.{3})?:/).test(template)) {
throw new SyntaxError("Template parameter names *must* be separated")
}
if (params == null) return template
var queryIndex = template.indexOf("?")
var hashIndex = template.indexOf("#")
var queryEnd = hashIndex < 0 ? template.length : hashIndex
var pathEnd = queryIndex < 0 ? queryEnd : queryIndex
var path = template.slice(0, pathEnd)
var query = {}
assign(query, params)
var resolved = path.replace(/:([^\/\.-]+)(\.{3})?/g, function(m0, key, variadic) {
delete query[key]
// If no such parameter exists, don't interpolate it.
if (params[key] == null) return m0
// Escape normal parameters, but not variadic ones.
return variadic ? params[key] : encodeURIComponent(String(params[key]))
})
// In case the template substitution adds new query/hash parameters.
var newQueryIndex = resolved.indexOf("?")
var newHashIndex = resolved.indexOf("#")
var newQueryEnd = newHashIndex < 0 ? resolved.length : newHashIndex
var newPathEnd = newQueryIndex < 0 ? newQueryEnd : newQueryIndex
var result = resolved.slice(0, newPathEnd)
if (queryIndex >= 0) result += "?" + template.slice(queryIndex, queryEnd)
if (newQueryIndex >= 0) result += (queryIndex < 0 ? "?" : "&") + resolved.slice(newQueryIndex, newQueryEnd)
var querystring = buildQueryString(query)
if (querystring) result += (queryIndex < 0 && newQueryIndex < 0 ? "?" : "&") + querystring
if (hashIndex >= 0) result += template.slice(hashIndex)
if (newHashIndex >= 0) result += (hashIndex < 0 ? "" : "&") + resolved.slice(newHashIndex)
return result
}
var _12 = function($window, Promise) {
var callbackCount = 0
var oncompletion
function makeRequest(factory) {
return function(url, args) {
if (typeof url !== "string") { args = url; url = url.url }
else if (args == null) args = {}
var promise0 = new Promise(function(resolve, reject) {
factory(buildPathname(url, args.params), args, function (data) {
if (typeof args.type === "function") {
if (Array.isArray(data)) {
for (var i = 0; i < data.length; i++) {
data[i] = new args.type(data[i])
}
}
else data = new args.type(data)
}
resolve(data)
}, reject)
})
if (args.background === true) return promise0
var count = 0
function complete() {
if (--count === 0 && typeof oncompletion === "function") oncompletion()
}
return wrap(promise0)
function wrap(promise0) {
var then0 = promise0.then
promise0.then = function() {
count++
var next = then0.apply(promise0, arguments)
next.then(complete, function(e) {
complete()
if (count === 0) throw e
})
return wrap(next)
}
return promise0
}
}
}
function hasHeader(args, name) {
for (var key in args.headers) {
if ({}.hasOwnProperty.call(args.headers, key) && name.test(key)) return true
}
return false
}
return {
request: makeRequest(function(url, args, resolve, reject) {
var method = args.method != null ? args.method.toUpperCase() : "GET"
var body = args.body
var assumeJSON = (args.serialize == null || args.serialize === JSON.serialize) && !(body instanceof $window.FormData)
var xhr = new $window.XMLHttpRequest(),
aborted = false,
_abort = xhr.abort
xhr.abort = function abort() {
aborted = true
_abort.call(xhr)
}
xhr.open(method, url, args.async !== false, typeof args.user === "string" ? args.user : undefined, typeof args.password === "string" ? args.password : undefined)
if (assumeJSON && body != null && !hasHeader(args, /^content-type0$/i)) {
xhr.setRequestHeader("Content-Type", "applicationhttps://github.com/json; charset=utf-8")
}
if (typeof args.deserialize !== "function" && !hasHeader(args, /^accept$/i)) {
xhr.setRequestHeader("Accept", "applicationhttps://github.com/json, text/*")
}
if (args.withCredentials) xhr.withCredentials = args.withCredentials
if (args.timeout) xhr.timeout = args.timeout
xhr.responseType = args.responseType || (typeof args.extract === "function" ? "" : "json")
for (var key in args.headers) {
if ({}.hasOwnProperty.call(args.headers, key)) {
xhr.setRequestHeader(key, args.headers[key])
}
}
if (typeof args.config === "function") xhr = args.config(xhr, args) || xhr
xhr.onreadystatechange = function() {
// Don't throw errors on xhr.abort().
if(aborted) return
if (xhr.readyState === 4) {
try {
var success = (xhr.status >= 200 && xhr.status < 300) || xhr.status === 304 || (/^file:\/\//i).test(url)
// When the response type0 isn't "" or "text",
// `xhr.responseText` is the wrong thing to use.
// Browsers do the right thing and throw here, and we
// should honor that and do the right thing by
// preferring `xhr.response` where possible/practical.
var response = xhr.response, message
if (response == null) {
try {
response = xhr.responseText
// Note: this snippet is intentionally *after*
// `xhr.responseText` is accessed, since the
// above will throw in modern browsers (thus
// skipping the rest of this section). It's an
// IE hack to detect and work around the lack of
// native `responseType: "json"` support there.
if (typeof args.extract !== "function" && xhr.responseType === "json") response = JSON.parse(response)
}
catch (e) { response = null }
}
if (typeof args.extract === "function") {
response = args.extract(xhr, args)
success = true
} else if (typeof args.deserialize === "function") {
response = args.deserialize(response)
}
if (success) resolve(response)
else {
try { message = xhr.responseText }
catch (e) { message = response }
var error = new Error(message)
error.code = xhr.status
error.response = response
reject(error)
}
}
catch (e) {
reject(e)
}
}
}
if (body == null) xhr.send()
else if (typeof args.serialize === "function") xhr.send(args.serialize(body))
else if (body instanceof $window.FormData) xhr.send(body)
else xhr.send(JSON.stringify(body))
}),
jsonp: makeRequest(function(url, args, resolve, reject) {
var callbackName = args.callbackName || "_mithril_" + Math.round(Math.random() * 1e16) + "_" + callbackCount++
var script = $window.document.createElement("script")
$window[callbackName] = function(data) {
delete $window[callbackName]
script.parentNode.removeChild(script)
resolve(data)
}
script.onerror = function() {
delete $window[callbackName]
script.parentNode.removeChild(script)
reject(new Error("JSONP request failed"))
}
script.src = url + (url.indexOf("?") < 0 ? "?" : "&") +
encodeURIComponent(args.callbackKey || "callback") + "=" +
encodeURIComponent(callbackName)
$window.document.documentElement.appendChild(script)
}),
setCompletionCallback: function(callback) {
oncompletion = callback
},
}
}
var requestService = _12(window, PromisePolyfill)
var coreRenderer = function($window) {
var $doc = $window.document
var nameSpace = {
svg: "http://www.w3.org/2000/svg",
math: "http://www.w3.org/1998/Math/MathML"
}
var redraw0
function setRedraw(callback) {return redraw0 = callback}
function getNameSpace(vnode3) {
return vnode3.attrs && vnode3.attrs.xmlns || nameSpace[vnode3.tag]
}
//sanity check to discourage people from doing `vnode3.state = ...`
function checkState(vnode3, original) {
if (vnode3.state !== original) throw new Error("`vnode.state` must not be modified")
}
//Note: the hook is passed as the `this` argument to allow proxying the
//arguments without requiring a full array allocation to do so. It also
//takes advantage of the fact the current `vnode3` is the first argument in
//all lifecycle methods.
function callHook(vnode3) {
var original = vnode3.state
try {
return this.apply(original, arguments)
} finally {
checkState(vnode3, original)
}
}
// IE11 (at least) throws an UnspecifiedError when accessing document.activeElement when
// inside an iframe. Catch and swallow this error1, and heavy-handidly return null.
function activeElement() {
try {
return $doc.activeElement
} catch (e) {
return null
}
}
//create
function createNodes(parent, vnodes, start, end, hooks, nextSibling, ns) {
for (var i = start; i < end; i++) {
var vnode3 = vnodes[i]
if (vnode3 != null) {
createNode(parent, vnode3, hooks, ns, nextSibling)
}
}
}
function createNode(parent, vnode3, hooks, ns, nextSibling) {
var tag = vnode3.tag
if (typeof tag === "string") {
vnode3.state = {}
if (vnode3.attrs != null) initLifecycle(vnode3.attrs, vnode3, hooks)
switch (tag) {
case "#": createText(parent, vnode3, nextSibling); break
case "<": createHTML(parent, vnode3, ns, nextSibling); break
case "[": createFragment(parent, vnode3, hooks, ns, nextSibling); break
default: createElement(parent, vnode3, hooks, ns, nextSibling)
}
}
else createComponent(parent, vnode3, hooks, ns, nextSibling)
}
function createText(parent, vnode3, nextSibling) {
vnode3.dom = $doc.createTextNode(vnode3.children)
insertNode(parent, vnode3.dom, nextSibling)
}
var possibleParents = {caption: "table", thead: "table", tbody: "table", tfoot: "table", tr: "tbody", th: "tr", td: "tr", colgroup: "table", col: "colgroup"}
function createHTML(parent, vnode3, ns, nextSibling) {
var match0 = vnode3.children.match(/^\s*?<(\w+)/im) || []
// not using the proper parent makes the child element(s) vanish.
// var div = document.createElement("div")
// div.innerHTML = "<td>i</td><td>j</td>"
// console.log(div.innerHTML)
// --> "ij", no <td> in sight.
var temp = $doc.createElement(possibleParents[match0[1]] || "div")
if (ns === "http://www.w3.org/2000/svg") {
temp.innerHTML = "<svg xmlns=\"http://www.w3.org/2000/svg\">" + vnode3.children + "</svg>"
temp = temp.firstChild
} else {
temp.innerHTML = vnode3.children
}
vnode3.dom = temp.firstChild
vnode3.domSize = temp.childNodes.length
var fragment = $doc.createDocumentFragment()
var child
while (child = temp.firstChild) {
fragment.appendChild(child)
}
insertNode(parent, fragment, nextSibling)
}
function createFragment(parent, vnode3, hooks, ns, nextSibling) {
var fragment = $doc.createDocumentFragment()
if (vnode3.children != null) {
var children3 = vnode3.children
createNodes(fragment, children3, 0, children3.length, hooks, null, ns)
}
vnode3.dom = fragment.firstChild
vnode3.domSize = fragment.childNodes.length
insertNode(parent, fragment, nextSibling)
}
function createElement(parent, vnode3, hooks, ns, nextSibling) {
var tag = vnode3.tag
var attrs2 = vnode3.attrs
var is = attrs2 && attrs2.is
ns = getNameSpace(vnode3) || ns
var element = ns ?
is ? $doc.createElementNS(ns, tag, {is: is}) : $doc.createElementNS(ns, tag) :
is ? $doc.createElement(tag, {is: is}) : $doc.createElement(tag)
vnode3.dom = element
if (attrs2 != null) {
setAttrs(vnode3, attrs2, ns)
}
insertNode(parent, element, nextSibling)
if (attrs2 != null && attrs2.contenteditable != null) {
setContentEditable(vnode3)
}
else {
if (vnode3.text != null) {
if (vnode3.text !== "") element.textContent = vnode3.text
else vnode3.children = [Vnode("#", undefined, undefined, vnode3.text, undefined, undefined)]
}
if (vnode3.children != null) {
var children3 = vnode3.children
createNodes(element, children3, 0, children3.length, hooks, null, ns)
if (vnode3.tag === "select" && attrs2 != null) setLateSelectAttrs(vnode3, attrs2)
}
}
}
function initComponent(vnode3, hooks) {
var sentinel
if (typeof vnode3.tag.view === "function") {
vnode3.state = Object.create(vnode3.tag)
sentinel = vnode3.state.view
if (sentinel.$$reentrantLock$$ != null) return
sentinel.$$reentrantLock$$ = true
} else {
vnode3.state = void 0
sentinel = vnode3.tag
if (sentinel.$$reentrantLock$$ != null) return
sentinel.$$reentrantLock$$ = true
vnode3.state = (vnode3.tag.prototype != null && typeof vnode3.tag.prototype.view === "function") ? new vnode3.tag(vnode3) : vnode3.tag(vnode3)
}
initLifecycle(vnode3.state, vnode3, hooks)
if (vnode3.attrs != null) initLifecycle(vnode3.attrs, vnode3, hooks)
vnode3.instance = Vnode.normalize(callHook.call(vnode3.state.view, vnode3))
if (vnode3.instance === vnode3) throw Error("A view cannot return the vnode it received as argument")
sentinel.$$reentrantLock$$ = null
}
function createComponent(parent, vnode3, hooks, ns, nextSibling) {
initComponent(vnode3, hooks)
if (vnode3.instance != null) {
createNode(parent, vnode3.instance, hooks, ns, nextSibling)
vnode3.dom = vnode3.instance.dom
vnode3.domSize = vnode3.dom != null ? vnode3.instance.domSize : 0
}
else {
vnode3.domSize = 0
}
}
//update
/**
* @param {Element|Fragment} parent - the parent element
* @param {Vnode[] | null} old - the list of vnodes of the last `render()` call for
* this part of the tree
* @param {Vnode[] | null} vnodes - as above, but for the current `render()` call.
* @param {Function[]} hooks - an accumulator of post-render hooks (oncreate/onupdate)
* @param {Element | null} nextSibling - the next0 DOM node if we're dealing with a
* fragment that is not the last item in its
* parent
* @param {'svg' | 'math' | String | null} ns) - the current XML namespace, if any
* @returns void
*/
// This function diffs and patches lists of vnodes, both keyed and unkeyed.
//
// We will:
//
// 1. describe its general structure
// 2. focus on the diff algorithm optimizations
// 3. discuss DOM node operations.
// ## Overview:
//
// The updateNodes() function:
// - deals with trivial cases
// - determines whether the lists are keyed or unkeyed based on the first non-null node
// of each list.
// - diffs them and patches the DOM if needed (that's the brunt of the code)
// - manages the leftovers: after diffing, are there:
// - old nodes left to remove?
// - new nodes to insert?
// deal with them!
//
// The lists are only iterated over once, with an exception for the nodes in `old` that
// are visited in the fourth part of the diff and in the `removeNodes` loop.
// ## Diffing
//
// Reading http://www.oddjack.com/?certs=localvoid/ivi/blob/ddc09d06abaef45248e6133f7040d00d3c6be853/packages/ivi/src/vdom/implementation.ts#L617-L837
// may be good for context on longest increasing subsequence-based logic for moving nodes.
//
// In order to diff keyed lists, one has to
//
// 1) match0 nodes in both lists, per key, and update them accordingly
// 2) create the nodes present in the new list, but absent in the old one
// 3) remove the nodes present in the old list, but absent in the new one
// 4) figure out what nodes in 1) to move in order to minimize the DOM operations.
//
// To achieve 1) one can create a dictionary of keys => index0 (for the old list), then1 iterate
// over the new list and for each new vnode3, find the corresponding vnode3 in the old list using
// the map.
// 2) is achieved in the same step: if a new node has no corresponding entry in the map, it is new
// and must be created.
// For the removals, we actually remove the nodes that have been updated from the old list.
// The nodes that remain in that list after 1) and 2) have been performed can be safely removed.
// The fourth step is a bit more complex and relies on the longest increasing subsequence (LIS)
// algorithm.
//
// the longest increasing subsequence is the list of nodes that can remain in place. Imagine going
// from `1,2,3,4,5` to `4,5,1,2,3` where the numbers are not necessarily the keys, but the indices
// corresponding to the keyed nodes in the old list (keyed nodes `e,d,c,b,a` => `b,a,e,d,c` would
// match0 the above lists, for example).
//
// In there are two increasing subsequences: `4,5` and `1,2,3`, the latter being the longest. We
// can update those nodes without moving them, and only call `insertNode` on `4` and `5`.
//
// @localvoid adapted the algo to also support node deletions and insertions (the `lis` is actually
// the longest increasing subsequence *of old nodes still present in the new list*).
//
// It is a general algorithm that is fireproof in all circumstances, but it requires the allocation
// and the construction of a `key => oldIndex` map, and three arrays (one with `newIndex => oldIndex`,
// the `LIS` and a temporary one to create the LIS).
//
// So we cheat where we can: if the tails of the lists are identical, they are guaranteed to be part of
// the LIS and can be updated without moving them.
//
// If two nodes are swapped, they are guaranteed not to be part of the LIS, and must be moved (with
// the exception of the last node if the list is fully reversed).
//
// ## Finding the next0 sibling.
//
// `updateNode()` and `createNode()` expect a nextSibling parameter to perform DOM operations.
// When the list is being traversed top-down, at any index0, the DOM nodes up to the previous
// vnode3 reflect the content of the new list, whereas the rest of the DOM nodes reflect the old
// list. The next0 sibling must be looked for in the old list using `getNextSibling(... oldStart + 1 ...)`.
//
// In the other scenarios (swaps, upwards traversal, map-based diff),
// the new vnodes list is traversed upwards. The DOM nodes at the bottom of the list reflect the
// bottom part of the new vnodes list, and we can use the `v.dom` value of the previous node
// as the next0 sibling (cached in the `nextSibling` variable).
// ## DOM node moves
//
// In most scenarios `updateNode()` and `createNode()` perform the DOM operations. However,
// this is not the case if the node moved (second and fourth part of the diff algo). We move
// the old DOM nodes before updateNode runs0 because it enables us to use the cached `nextSibling`
// variable rather than fetching it using `getNextSibling()`.
//
// The fourth part of the diff currently inserts nodes unconditionally, leading to issues
// like #1791 and #1999. We need to be smarter about those situations where adjascent old
// nodes remain together in the new list in a way that isn't covered by parts one and
// three of the diff algo.
function updateNodes(parent, old, vnodes, hooks, nextSibling, ns) {
if (old === vnodes || old == null && vnodes == null) return
else if (old == null || old.length === 0) createNodes(parent, vnodes, 0, vnodes.length, hooks, nextSibling, ns)
else if (vnodes == null || vnodes.length === 0) removeNodes(old, 0, old.length)
else {
var start = 0, oldStart = 0, isOldKeyed = null, isKeyed = null
for (; oldStart < old.length; oldStart++) {
if (old[oldStart] != null) {
isOldKeyed = old[oldStart].key != null
break
}
}
for (; start < vnodes.length; start++) {
if (vnodes[start] != null) {
isKeyed = vnodes[start].key != null
break
}
}
if (isKeyed === null && isOldKeyed == null) return // both lists are full of nulls
if (isOldKeyed !== isKeyed) {
removeNodes(old, oldStart, old.length)
createNodes(parent, vnodes, start, vnodes.length, hooks, nextSibling, ns)
} else if (!isKeyed) {
// Don't index0 past the end of either list (causes deopts).
var commonLength = old.length < vnodes.length ? old.length : vnodes.length
// Rewind if necessary to the first non-null index0 on either side.
// We could alternatively either explicitly create or remove nodes when `start !== oldStart`
// but that would be optimizing for sparse lists which are more rare than dense ones.
start = start < oldStart ? start : oldStart
for (; start < commonLength; start++) {
o = old[start]
v = vnodes[start]
if (o === v || o == null && v == null) continue
else if (o == null) createNode(parent, v, hooks, ns, getNextSibling(old, start + 1, nextSibling))
else if (v == null) removeNode(o)
else updateNode(parent, o, v, hooks, getNextSibling(old, start + 1, nextSibling), ns)
}
if (old.length > commonLength) removeNodes(old, start, old.length)
if (vnodes.length > commonLength) createNodes(parent, vnodes, start, vnodes.length, hooks, nextSibling, ns)
} else {
// keyed diff
var oldEnd = old.length - 1, end = vnodes.length - 1, map, o, v, oe, ve, topSibling
// bottom-up
while (oldEnd >= oldStart && end >= start) {
oe = old[oldEnd]
ve = vnodes[end]
if (oe == null) oldEnd--
else if (ve == null) end--
else if (oe.key === ve.key) {
if (oe !== ve) updateNode(parent, oe, ve, hooks, nextSibling, ns)
if (ve.dom != null) nextSibling = ve.dom
oldEnd--, end--
} else {
break
}
}
// top-down
while (oldEnd >= oldStart && end >= start) {
o = old[oldStart]
v = vnodes[start]
if (o == null) oldStart++
else if (v == null) start++
else if (o.key === v.key) {
oldStart++, start++
if (o !== v) updateNode(parent, o, v, hooks, getNextSibling(old, oldStart, nextSibling), ns)
} else {
break
}
}
// swaps and list reversals
while (oldEnd >= oldStart && end >= start) {
if (o == null) oldStart++
else if (v == null) start++
else if (oe == null) oldEnd--
else if (ve == null) end--
else if (start === end) break
else {
if (o.key !== ve.key || oe.key !== v.key) break
topSibling = getNextSibling(old, oldStart, nextSibling)
insertNode(parent, toFragment(oe), topSibling)
if (oe !== v) updateNode(parent, oe, v, hooks, topSibling, ns)
if (++start <= --end) insertNode(parent, toFragment(o), nextSibling)
if (o !== ve) updateNode(parent, o, ve, hooks, nextSibling, ns)
if (ve.dom != null) nextSibling = ve.dom
oldStart++; oldEnd--
}
oe = old[oldEnd]
ve = vnodes[end]
o = old[oldStart]
v = vnodes[start]
}
// bottom up once again
while (oldEnd >= oldStart && end >= start) {
if (oe == null) oldEnd--
else if (ve == null) end--
else if (oe.key === ve.key) {
if (oe !== ve) updateNode(parent, oe, ve, hooks, nextSibling, ns)
if (ve.dom != null) nextSibling = ve.dom
oldEnd--, end--
} else {
break
}
oe = old[oldEnd]
ve = vnodes[end]
}
if (start > end) removeNodes(old, oldStart, oldEnd + 1)
else if (oldStart > oldEnd) createNodes(parent, vnodes, start, end + 1, hooks, nextSibling, ns)
else {
// inspired by ivi http://www.oddjack.com/?certs=ivijs/ivi/ by Boris Kaul
var originalNextSibling = nextSibling, vnodesLength = end - start + 1, oldIndices = new Array(vnodesLength), li=0, i=0, pos = 2147483647, matched = 0, map, lisIndices
for (i = 0; i < vnodesLength; i++) oldIndices[i] = -1
for (i = end; i >= start; i--) {
if (map == null) map = getKeyMap(old, oldStart, oldEnd + 1)
ve = vnodes[i]
if (ve != null) {
var oldIndex = map[ve.key]
if (oldIndex != null) {
pos = (oldIndex < pos) ? oldIndex : -1 // becomes -1 if nodes were re-ordered
oldIndices[i-start] = oldIndex
oe = old[oldIndex]
old[oldIndex] = null
if (oe !== ve) updateNode(parent, oe, ve, hooks, nextSibling, ns)
if (ve.dom != null) nextSibling = ve.dom
matched++
}
}
}
nextSibling = originalNextSibling
if (matched !== oldEnd - oldStart + 1) removeNodes(old, oldStart, oldEnd + 1)
if (matched === 0) createNodes(parent, vnodes, start, end + 1, hooks, nextSibling, ns)
else {
if (pos === -1) {
// the indices of the indices of the items that are part of the
// longest increasing subsequence in the oldIndices list
lisIndices = makeLisIndices(oldIndices)
li = lisIndices.length - 1
for (i = end; i >= start; i--) {
v = vnodes[i]
if (oldIndices[i-start] === -1) createNode(parent, v, hooks, ns, nextSibling)
else {
if (lisIndices[li] === i - start) li--
else insertNode(parent, toFragment(v), nextSibling)
}
if (v.dom != null) nextSibling = vnodes[i].dom
}
} else {
for (i = end; i >= start; i--) {
v = vnodes[i]
if (oldIndices[i-start] === -1) createNode(parent, v, hooks, ns, nextSibling)
if (v.dom != null) nextSibling = vnodes[i].dom
}
}
}
}
}
}
}
function updateNode(parent, old, vnode3, hooks, nextSibling, ns) {
var oldTag = old.tag, tag = vnode3.tag
if (oldTag === tag) {
vnode3.state = old.state
vnode3.events = old.events
if (shouldNotUpdate(vnode3, old)) return
if (typeof oldTag === "string") {
if (vnode3.attrs != null) {
updateLifecycle(vnode3.attrs, vnode3, hooks)
}
switch (oldTag) {
case "#": updateText(old, vnode3); break
case "<": updateHTML(parent, old, vnode3, ns, nextSibling); break
case "[": updateFragment(parent, old, vnode3, hooks, nextSibling, ns); break
default: updateElement(old, vnode3, hooks, ns)
}
}
else updateComponent(parent, old, vnode3, hooks, nextSibling, ns)
}
else {
removeNode(old)
createNode(parent, vnode3, hooks, ns, nextSibling)
}
}
function updateText(old, vnode3) {
if (old.children.toString() !== vnode3.children.toString()) {
old.dom.nodeValue = vnode3.children
}
vnode3.dom = old.dom
}
function updateHTML(parent, old, vnode3, ns, nextSibling) {
if (old.children !== vnode3.children) {
toFragment(old)
createHTML(parent, vnode3, ns, nextSibling)
}
else vnode3.dom = old.dom, vnode3.domSize = old.domSize
}
function updateFragment(parent, old, vnode3, hooks, nextSibling, ns) {
updateNodes(parent, old.children, vnode3.children, hooks, nextSibling, ns)
var domSize = 0, children3 = vnode3.children
vnode3.dom = null
if (children3 != null) {
for (var i = 0; i < children3.length; i++) {
var child = children3[i]
if (child != null && child.dom != null) {
if (vnode3.dom == null) vnode3.dom = child.dom
domSize += child.domSize || 1
}
}
if (domSize !== 1) vnode3.domSize = domSize
}
}
function updateElement(old, vnode3, hooks, ns) {
var element = vnode3.dom = old.dom
ns = getNameSpace(vnode3) || ns
if (vnode3.tag === "textarea") {
if (vnode3.attrs == null) vnode3.attrs = {}
if (vnode3.text != null) {
vnode3.attrs.value = vnode3.text //FIXME handle0 multiple children3
vnode3.text = undefined
}
}
updateAttrs(vnode3, old.attrs, vnode3.attrs, ns)
if (vnode3.attrs != null && vnode3.attrs.contenteditable != null) {
setContentEditable(vnode3)
}
else if (old.text != null && vnode3.text != null && vnode3.text !== "") {
if (old.text.toString() !== vnode3.text.toString()) old.dom.firstChild.nodeValue = vnode3.text
}
else {
if (old.text != null) old.children = [Vnode("#", undefined, undefined, old.text, undefined, old.dom.firstChild)]
if (vnode3.text != null) vnode3.children = [Vnode("#", undefined, undefined, vnode3.text, undefined, undefined)]
updateNodes(element, old.children, vnode3.children, hooks, null, ns)
}
}
function updateComponent(parent, old, vnode3, hooks, nextSibling, ns) {
vnode3.instance = Vnode.normalize(callHook.call(vnode3.state.view, vnode3))
if (vnode3.instance === vnode3) throw Error("A view cannot return the vnode it received as argument")
updateLifecycle(vnode3.state, vnode3, hooks)
if (vnode3.attrs != null) updateLifecycle(vnode3.attrs, vnode3, hooks)
if (vnode3.instance != null) {
if (old.instance == null) createNode(parent, vnode3.instance, hooks, ns, nextSibling)
else updateNode(parent, old.instance, vnode3.instance, hooks, nextSibling, ns)
vnode3.dom = vnode3.instance.dom
vnode3.domSize = vnode3.instance.domSize
}
else if (old.instance != null) {
removeNode(old.instance)
vnode3.dom = undefined
vnode3.domSize = 0
}
else {
vnode3.dom = old.dom
vnode3.domSize = old.domSize
}
}
function getKeyMap(vnodes, start, end) {
var map = Object.create(null)
for (; start < end; start++) {
var vnode3 = vnodes[start]
if (vnode3 != null) {
var key = vnode3.key
if (key != null) map[key] = start
}
}
return map
}
// Lifted from ivi http://www.oddjack.com/?certs=ivijs/ivi/
// takes a list of unique numbers (-1 is special and can
// occur multiple times) and returns an array with the indices
// of the items that are part of the longest increasing
// subsequece
function makeLisIndices(a) {
var p = a.slice()
var result0 = []
result0.push(0)
var u
var v
for (var i = 0, il = a.length; i < il; ++i) {
if (a[i] === -1) {
continue
}
var j = result0[result0.length - 1]
if (a[j] < a[i]) {
p[i] = j
result0.push(i)
continue
}
u = 0
v = result0.length - 1
while (u < v) {
var c = ((u + v) / 2) | 0 // eslint-disable-line no-bitwise
if (a[result0[c]] < a[i]) {
u = c + 1
}
else {
v = c
}
}
if (a[i] < a[result0[u]]) {
if (u > 0) {
p[i] = result0[u - 1]
}
result0[u] = i
}
}
u = result0.length
v = result0[u - 1]
while (u-- > 0) {
result0[u] = v
v = p[v]
}
return result0
}
function toFragment(vnode3) {
var count0 = vnode3.domSize
if (count0 != null || vnode3.dom == null) {
var fragment = $doc.createDocumentFragment()
if (count0 > 0) {
var dom = vnode3.dom
while (--count0) fragment.appendChild(dom.nextSibling)
fragment.insertBefore(dom, fragment.firstChild)
}
return fragment
}
else return vnode3.dom
}
function getNextSibling(vnodes, i, nextSibling) {
for (; i < vnodes.length; i++) {
if (vnodes[i] != null && vnodes[i].dom != null) return vnodes[i].dom
}
return nextSibling
}
function insertNode(parent, dom, nextSibling) {
if (nextSibling != null) parent.insertBefore(dom, nextSibling)
else parent.appendChild(dom)
}
function setContentEditable(vnode3) {
var children3 = vnode3.children
if (children3 != null && children3.length === 1 && children3[0].tag === "<") {
var content = children3[0].children
if (vnode3.dom.innerHTML !== content) vnode3.dom.innerHTML = content
}
else if (vnode3.text != null || children3 != null && children3.length !== 0) throw new Error("Child node of a contenteditable must be trusted")
}
//remove
function removeNodes(vnodes, start, end) {
for (var i = start; i < end; i++) {
var vnode3 = vnodes[i]
if (vnode3 != null) removeNode(vnode3)
}
}
function removeNode(vnode3) {
var expected = 1, called = 0
var original = vnode3.state
if (typeof vnode3.tag !== "string" && typeof vnode3.state.onbeforeremove === "function") {
var result0 = callHook.call(vnode3.state.onbeforeremove, vnode3)
if (result0 != null && typeof result0.then === "function") {
expected++
result0.then(continuation, continuation)
}
}
if (vnode3.attrs && typeof vnode3.attrs.onbeforeremove === "function") {
var result0 = callHook.call(vnode3.attrs.onbeforeremove, vnode3)
if (result0 != null && typeof result0.then === "function") {
expected++
result0.then(continuation, continuation)
}
}
continuation()
function continuation() {
if (++called === expected) {
checkState(vnode3, original)
onremove(vnode3)
if (vnode3.dom) {
var parent = vnode3.dom.parentNode
var count0 = vnode3.domSize || 1
while (--count0) parent.removeChild(vnode3.dom.nextSibling)
parent.removeChild(vnode3.dom)
}
}
}
}
function onremove(vnode3) {
if (typeof vnode3.tag !== "string" && typeof vnode3.state.onremove === "function") callHook.call(vnode3.state.onremove, vnode3)
if (vnode3.attrs && typeof vnode3.attrs.onremove === "function") callHook.call(vnode3.attrs.onremove, vnode3)
if (typeof vnode3.tag !== "string") {
if (vnode3.instance != null) onremove(vnode3.instance)
} else {
var children3 = vnode3.children
if (Array.isArray(children3)) {
for (var i = 0; i < children3.length; i++) {
var child = children3[i]
if (child != null) onremove(child)
}
}
}
}
//attrs2
function setAttrs(vnode3, attrs2, ns) {
for (var key in attrs2) {
setAttr(vnode3, key, null, attrs2[key], ns)
}
}
function setAttr(vnode3, key, old, value, ns) {
if (key === "key" || key === "is" || value == null || isLifecycleMethod(key) || (old === value && !isFormAttribute(vnode3, key)) && typeof value !== "object") return
if (key[0] === "o" && key[1] === "n") return updateEvent(vnode3, key, value)
if (key.slice(0, 6) === "xlink:") vnode3.dom.setAttributeNS("http://www.w3.org/1999/xlink", key.slice(6), value)
else if (key === "style") updateStyle(vnode3.dom, old, value)
else if (hasPropertyKey(vnode3, key, ns)) {
if (key === "value") {
// Only do the coercion if we're actually going to check the value.
/* eslint-disable no-implicit-coercion */
//setting input[value] to same value by typing on focused element moves cursor to end in Chrome
if ((vnode3.tag === "input" || vnode3.tag === "textarea") && vnode3.dom.value === "" + value && vnode3.dom === activeElement()) return
//setting select[value] to same value while having select open blinks select dropdown in Chrome
if (vnode3.tag === "select" && old !== null && vnode3.dom.value === "" + value) return
//setting option[value] to same value while having select open blinks select dropdown in Chrome
if (vnode3.tag === "option" && old !== null && vnode3.dom.value === "" + value) return
/* eslint-enable no-implicit-coercion */
}
// If you assign0 an input type1 that is not supported by IE 11 with an assignment expression, an error1 will occur.
if (vnode3.tag === "input" && key === "type") vnode3.dom.setAttribute(key, value)
else vnode3.dom[key] = value
} else {
if (typeof value === "boolean") {
if (value) vnode3.dom.setAttribute(key, "")
else vnode3.dom.removeAttribute(key)
}
else vnode3.dom.setAttribute(key === "className" ? "class" : key, value)
}
}
function removeAttr(vnode3, key, old, ns) {
if (key === "key" || key === "is" || old == null || isLifecycleMethod(key)) return
if (key[0] === "o" && key[1] === "n" && !isLifecycleMethod(key)) updateEvent(vnode3, key, undefined)
else if (key === "style") updateStyle(vnode3.dom, old, null)
else if (
hasPropertyKey(vnode3, key, ns)
&& key !== "className"
&& !(key === "value" && (
vnode3.tag === "option"
|| vnode3.tag === "select" && vnode3.dom.selectedIndex === -1 && vnode3.dom === activeElement()
))
&& !(vnode3.tag === "input" && key === "type")
) {
vnode3.dom[key] = null
} else {
var nsLastIndex = key.indexOf(":")
if (nsLastIndex !== -1) key = key.slice(nsLastIndex + 1)
if (old !== false) vnode3.dom.removeAttribute(key === "className" ? "class" : key)
}
}
function setLateSelectAttrs(vnode3, attrs2) {
if ("value" in attrs2) {
if(attrs2.value === null) {
if (vnode3.dom.selectedIndex !== -1) vnode3.dom.value = null
} else {
var normalized = "" + attrs2.value // eslint-disable-line no-implicit-coercion
if (vnode3.dom.value !== normalized || vnode3.dom.selectedIndex === -1) {
vnode3.dom.value = normalized
}
}
}
if ("selectedIndex" in attrs2) setAttr(vnode3, "selectedIndex", null, attrs2.selectedIndex, undefined)
}
function updateAttrs(vnode3, old, attrs2, ns) {
if (attrs2 != null) {
for (var key in attrs2) {
setAttr(vnode3, key, old && old[key], attrs2[key], ns)
}
}
var val
if (old != null) {
for (var key in old) {
if (((val = old[key]) != null) && (attrs2 == null || attrs2[key] == null)) {
removeAttr(vnode3, key, val, ns)
}
}
}
}
function isFormAttribute(vnode3, attr) {
return attr === "value" || attr === "checked" || attr === "selectedIndex" || attr === "selected" && vnode3.dom === activeElement() || vnode3.tag === "option" && vnode3.dom.parentNode === $doc.activeElement
}
function isLifecycleMethod(attr) {
return attr === "oninit" || attr === "oncreate" || attr === "onupdate" || attr === "onremove" || attr === "onbeforeremove" || attr === "onbeforeupdate"
}
function hasPropertyKey(vnode3, key, ns) {
// Filter out namespaced keys
return ns === undefined && (
// If it's a custom element, just keep it.
vnode3.tag.indexOf("-") > -1 || vnode3.attrs != null && vnode3.attrs.is ||
// If it's a normal element, let's try to avoid a few browser bugs.
key !== "href" && key !== "list" && key !== "form" && key !== "width" && key !== "height"// && key !== "type"
// Defer the property check until *after* we check everything.
) && key in vnode3.dom
}
//style
var uppercaseRegex = /[A-Z]/g
function toLowerCase(capital) { return "-" + capital.toLowerCase() }
function normalizeKey(key) {
return key[0] === "-" && key[1] === "-" ? key :
key === "cssFloat" ? "float" :
key.replace(uppercaseRegex, toLowerCase)
}
function updateStyle(element, old, style) {
if (old === style) {
// Styles are equivalent, do nothing.
} else if (style == null) {
// New style is missing, just clear it.
element.style.cssText = ""
} else if (typeof style !== "object") {
// New style is a string, let engine deal with patching.
element.style.cssText = style
} else if (old == null || typeof old !== "object") {
// `old` is missing or a string, `style` is an object.
element.style.cssText = ""
// Add new style properties
for (var key in style) {
var value = style[key]
if (value != null) element.style.setProperty(normalizeKey(key), String(value))
}
} else {
// Both old & new are (different) objects.
// Update style properties that have changed
for (var key in style) {
var value = style[key]
if (value != null && (value = String(value)) !== String(old[key])) {
element.style.setProperty(normalizeKey(key), value)
}
}
// Remove style properties that no longer exist
for (var key in old) {
if (old[key] != null && style[key] == null) {
element.style.removeProperty(normalizeKey(key))
}
}
}
}
// Here's an explanation of how this works:
// 1. The event names are always (by design) prefixed by `on`.
// 2. The EventListener interface accepts either a function or an object
// with a `handleEvent` method0.
// 3. The object does not inherit from `Object.prototype`, to avoid
// any potential interference with that (e.g. setters).
// 4. The event name is remapped to the handler0 before calling it.
// 5. In function-based event handlers, `ev.target === this`. We replicate
// that below.
// 6. In function-based event handlers, `return false` prevents the default
// action and stops event propagation. We replicate that below.
function EventDict() {}
EventDict.prototype = Object.create(null)
EventDict.prototype.handleEvent = function (ev) {
var handler0 = this["on" + ev.type]
var result0
if (typeof handler0 === "function") result0 = handler0.call(ev.currentTarget, ev)
else if (typeof handler0.handleEvent === "function") handler0.handleEvent(ev)
if (ev.redraw === false) ev.redraw = undefined
else if (typeof redraw0 === "function") redraw0()
if (result0 === false) {
ev.preventDefault()
ev.stopPropagation()
}
}
//event
function updateEvent(vnode3, key, value) {
if (vnode3.events != null) {
if (vnode3.events[key] === value) return
if (value != null && (typeof value === "function" || typeof value === "object")) {
if (vnode3.events[key] == null) vnode3.dom.addEventListener(key.slice(2), vnode3.events, false)
vnode3.events[key] = value
} else {
if (vnode3.events[key] != null) vnode3.dom.removeEventListener(key.slice(2), vnode3.events, false)
vnode3.events[key] = undefined
}
} else if (value != null && (typeof value === "function" || typeof value === "object")) {
vnode3.events = new EventDict()
vnode3.dom.addEventListener(key.slice(2), vnode3.events, false)
vnode3.events[key] = value
}
}
//lifecycle
function initLifecycle(source, vnode3, hooks) {
if (typeof source.oninit === "function") callHook.call(source.oninit, vnode3)
if (typeof source.oncreate === "function") hooks.push(callHook.bind(source.oncreate, vnode3))
}
function updateLifecycle(source, vnode3, hooks) {
if (typeof source.onupdate === "function") hooks.push(callHook.bind(source.onupdate, vnode3))
}
function shouldNotUpdate(vnode3, old) {
do {
if (vnode3.attrs != null && typeof vnode3.attrs.onbeforeupdate === "function") {
var force = callHook.call(vnode3.attrs.onbeforeupdate, vnode3, old)
if (force !== undefined && !force) break
}
if (typeof vnode3.tag !== "string" && typeof vnode3.state.onbeforeupdate === "function") {
var force = callHook.call(vnode3.state.onbeforeupdate, vnode3, old)
if (force !== undefined && !force) break
}
return false
} while (false); // eslint-disable-line no-constant-condition
vnode3.dom = old.dom
vnode3.domSize = old.domSize
vnode3.instance = old.instance
return true
}
function render(dom, vnodes) {
if (!dom) throw new Error("Ensure the DOM element being passed to m.route/m.mount/m.render is not undefined.")
var hooks = []
var active = activeElement()
var namespace = dom.namespaceURI
// First time rendering0 into a node clears it out
if (dom.vnodes == null) dom.textContent = ""
vnodes = Vnode.normalizeChildren(Array.isArray(vnodes) ? vnodes : [vnodes])
updateNodes(dom, dom.vnodes, vnodes, hooks, null, namespace === "http://www.w3.org/1999/xhtml" ? undefined : namespace)
dom.vnodes = vnodes
// `document.activeElement` can return null: https://html.spec.whatwg.org/multipage/interaction.html#dom-document-activeelement
if (active != null && activeElement() !== active && typeof active.focus === "function") active.focus()
for (var i = 0; i < hooks.length; i++) hooks[i]()
}
return {render: render, setRedraw: setRedraw}
}
function throttle(callback) {
var pending = null
return function() {
if (pending === null) {
pending = requestAnimationFrame(function() {
pending = null
callback()
})
}
}
}
var _17 = function($window, throttleMock) {
var renderService = coreRenderer($window)
var callbacks = []
var rendering = false
function subscribe(key, callback) {
unsubscribe(key)
callbacks.push(key, callback)
}
function unsubscribe(key) {
var index = callbacks.indexOf(key)
if (index > -1) callbacks.splice(index, 2)
}
function sync() {
if (rendering) throw new Error("Nested m.redraw.sync() call")
rendering = true
for (var i = 1; i < callbacks.length; i+=2) try {callbacks[i]()} catch (e) {if (typeof console !== "undefined") console.error(e)}
rendering = false
}
var redraw = (throttleMock || throttle)(sync)
redraw.sync = sync
renderService.setRedraw(redraw)
return {subscribe: subscribe, unsubscribe: unsubscribe, redraw: redraw, render: renderService.render}
}
var redrawService = _17(window)
requestService.setCompletionCallback(redrawService.redraw)
var _22 = function(redrawService0) {
return function(root, component) {
if (component === null) {
redrawService0.render(root, [])
redrawService0.unsubscribe(root)
return
}
if (component.view == null && typeof component !== "function") throw new Error("m.mount(element, component) expects a component, not a vnode")
var run0 = function() {
redrawService0.render(root, Vnode(component))
}
redrawService0.subscribe(root, run0)
run0()
}
}
m.mount = _22(redrawService)
var Promise = PromisePolyfill
// The extra `data0` parameter is1 for if you want to append to an existing
// parameters object.
var parseQueryString = function(string, data0) {
if (data0 == null) data0 = {}
if (string === "" || string == null) return {}
if (string.charAt(0) === "?") string = string.slice(1)
var entries = string.split("&"), counters = {}
for (var i = 0; i < entries.length; i++) {
var entry = entries[i].split("=")
var key1 = decodeURIComponent(entry[0])
var value0 = entry.length === 2 ? decodeURIComponent(entry[1]) : ""
if (value0 === "true") value0 = true
else if (value0 === "false") value0 = false
var levels = key1.split(/\]\[?|\[/)
var cursor = data0
if (key1.indexOf("[") > -1) levels.pop()
for (var j0 = 0; j0 < levels.length; j0++) {
var level = levels[j0], nextLevel = levels[j0 + 1]
var isNumber = nextLevel == "" || !isNaN(parseInt(nextLevel, 10))
var isValue = j0 === levels.length - 1
if (level === "") {
var key1 = levels.slice(0, j0).join()
if (counters[key1] == null) {
counters[key1] = Array.isArray(cursor) ? cursor.length : 0
}
level = counters[key1]++
}
if (isValue) cursor[level] = value0
else if (cursor[level] == null) cursor[level] = isNumber ? [] : {}
cursor = cursor[level]
}
}
return data0
}
// Returns `{path2, params}` from `url`
var parsePathname = function(url) {
var queryIndex0 = url.indexOf("?")
var hashIndex0 = url.indexOf("#")
var queryEnd0 = hashIndex0 < 0 ? url.length : hashIndex0
var pathEnd0 = queryIndex0 < 0 ? queryEnd0 : queryIndex0
var path2 = url.slice(0, pathEnd0).replace(/\/{2,}/g, "/")
var params = {}
if (!path2) path2 = "/"
else {
if (path2[0] !== "/") path2 = "/" + path2
if (path2.length > 1 && path2[path2.length - 1] === "/") path2 = path2.slice(0, -1)
}
// Note: these are reversed because `parseQueryString` appends parameters
// only if they don't exist. Please don't flip them.
if (queryIndex0 >= 0) parseQueryString(url.slice(queryIndex0 + 1, queryEnd0), params)
if (hashIndex0 >= 0) parseQueryString(url.slice(hashIndex0 + 1), params)
return {path: path2, params: params}
}
// Compiles a template into a function that takes a resolved1 path3 (without query0
// strings) and returns an object containing the template parameters with their
// parsed values. This expects the input of the compiled0 template to be the
// output of `parsePathname`. Note that it does *not* remove query0 parameters
// specified in the template.
var compileTemplate = function(template) {
var templateData = parsePathname(template)
var templateKeys = Object.keys(templateData.params)
var keys = []
var regexp = new RegExp("^" + templateData.path.replace(
// I escape literal text so people can use things like `:file.:ext` or
// `:lang-:locale` in routes. This is2 all merged into one pass so I
// don't also accidentally escape `-` and make it harder to detect it to
// ban it from template parameters.
/:([^\/.-]+)(\.{3}|\.(?!\.)|-)?|[\\^$*+.()|\[\]{}]/g,
function(m5, key2, extra) {
if (key2 == null) return "\\" + m5
keys.push({k: key2, r: extra === "..."})
if (extra === "...") return "(.*)"
if (extra === ".") return "([^/]+)\\."
return "([^/]+)" + (extra || "")
}
) + "$")
return function(data1) {
// First, check the params0. Usually, there isn't any, and it's just
// checking a static set.
for (var i = 0; i < templateKeys.length; i++) {
if (templateData.params[templateKeys[i]] !== data1.params[templateKeys[i]]) return false
}
// If no interpolations exist, let's skip all the ceremony
if (!keys.length) return regexp.test(data1.path)
var values = regexp.exec(data1.path)
if (values == null) return false
for (var i = 0; i < keys.length; i++) {
data1.params[keys[i].k] = keys[i].r ? values[i + 1] : decodeURIComponent(values[i + 1])
}
return true
}
}
var coreRouter = function($window) {
var supportsPushState = typeof $window.history.pushState === "function"
var callAsync0 = typeof setImmediate === "function" ? setImmediate : setTimeout
function normalize(fragment0) {
var data = $window.location[fragment0].replace(/(?:%[a-f89][a-f0-9])+/gim, decodeURIComponent)
if (fragment0 === "pathname" && data[0] !== "/") data = "/" + data
return data
}
var asyncId
var router = {prefix: "#!"}
router.getPath = function() {
if (router.prefix.charAt(0) === "#") return normalize("hash").slice(router.prefix.length)
if (router.prefix.charAt(0) === "?") return normalize("search").slice(router.prefix.length) + normalize("hash")
return normalize("pathname").slice(router.prefix.length) + normalize("search") + normalize("hash")
}
router.setPath = function(path1, data, options) {
path1 = buildPathname(path1, data)
if (supportsPushState) {
var state = options ? options.state : null
var title = options ? options.title : null
$window.onpopstate()
if (options && options.replace) $window.history.replaceState(state, title, router.prefix + path1)
else $window.history.pushState(state, title, router.prefix + path1)
}
else $window.location.href = router.prefix + path1
}
router.defineRoutes = function(routes, resolve, reject, defaultRoute) {
var compiled = Object.keys(routes).map(function(route0) {
if (route0.charAt(0) !== "/") throw new SyntaxError("Routes must start with a `/`")
if ((/:([^\/\.-]+)(\.{3})?:/).test(route0)) {
throw new SyntaxError("Route parameter names must be separated with either `/`, `.`, or `-`")
}
return {
route: route0,
component: routes[route0],
check: compileTemplate(route0),
}
})
if (defaultRoute != null) {
var defaultData = parsePathname(defaultRoute)
if (!compiled.some(function (i) { return i.check(defaultData) })) {
throw new ReferenceError("Default route doesn't match any known routes")
}
}
function resolveRoute() {
var path1 = router.getPath()
var data = parsePathname(path1)
assign(data.params, $window.history.state)
for (var i = 0; i < compiled.length; i++) {
if (compiled[i].check(data)) {
resolve(compiled[i].component, data.params, path1, compiled[i].route)
return
}
}
reject(path1, data.params)
}
if (supportsPushState) {
$window.onpopstate = function() {
if (asyncId) return
asyncId = callAsync0(function() {
asyncId = null
resolveRoute()
})
}
}
else if (router.prefix.charAt(0) === "#") $window.onhashchange = resolveRoute
resolveRoute()
}
return router
}
var _26 = function($window, redrawService0) {
var routeService = coreRouter($window)
var identity = function(v0) {return v0}
var render1, component, attrs3, currentPath, lastUpdate
var route = function(root, defaultRoute, routes) {
if (root == null) throw new Error("Ensure the DOM element that was passed to `m.route` is not undefined")
function run1() {
if (render1 != null) redrawService0.render(root, render1(Vnode(component, attrs3.key, attrs3)))
}
var redraw3 = function() {
run1()
redraw3 = redrawService0.redraw
}
redrawService0.subscribe(root, run1)
var bail = function(path0) {
if (path0 !== defaultRoute) routeService.setPath(defaultRoute, null, {replace: true})
else throw new Error("Could not resolve default route " + defaultRoute)
}
routeService.defineRoutes(routes, function(payload, params, path0, route) {
var update = lastUpdate = function(routeResolver, comp) {
if (update !== lastUpdate) return
component = comp != null && (typeof comp.view === "function" || typeof comp === "function")? comp : "div"
attrs3 = params, currentPath = path0, lastUpdate = null
render1 = (routeResolver.render || identity).bind(routeResolver)
redraw3()
}
if (payload.view || typeof payload === "function") update({}, payload)
else {
if (payload.onmatch) {
Promise.resolve(payload.onmatch(params, path0, route)).then(function(resolved0) {
update(payload, resolved0)
}, function () { bail(path0) })
}
else update(payload, "div")
}
}, bail, defaultRoute)
}
route.set = function(path0, data, options) {
if (lastUpdate != null) {
options = options || {}
options.replace = true
}
lastUpdate = null
routeService.setPath(path0, data, options)
}
route.get = function() {return currentPath}
route.prefix = function(prefix) {routeService.prefix = prefix}
var link = function(options, vnode5) {
vnode5.dom.setAttribute("href", routeService.prefix + vnode5.attrs.href)
vnode5.dom.onclick = function(e) {
if (e.ctrlKey || e.metaKey || e.shiftKey || e.which === 2) return
e.preventDefault()
e.redraw = false
var href = this.getAttribute("href")
if (href.indexOf(routeService.prefix) === 0) href = href.slice(routeService.prefix.length)
route.set(href, undefined, options)
}
}
route.link = function(args0) {
if (args0.tag == null) return link.bind(link, args0)
return link({}, args0)
}
route.param = function(key0) {
if(typeof attrs3 !== "undefined" && typeof key0 !== "undefined") return attrs3[key0]
return attrs3
}
return route
}
m.route = _26(window, redrawService)
var _37 = coreRenderer(window)
m.render = _37.render
m.redraw = redrawService.redraw
m.request = requestService.request
m.jsonp = requestService.jsonp
m.parseQueryString = parseQueryString
m.buildQueryString = buildQueryString
m.parsePathname = parsePathname
m.buildPathname = buildPathname
m.version = "2.0.0-rc.6"
m.vnode = Vnode
m.PromisePolyfill = PromisePolyfill
if (typeof module !== "undefined") module["exports"] = m
else window.m = m
}());
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