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Bundled output for commit 203df39c30 [skip ci]

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Gandalf-the-Bot 2018-04-16 07:47:53 +00:00
parent 203df39c30
commit ec43ca089c
3 changed files with 109 additions and 204 deletions
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2
README.md
View file

@ -18,7 +18,7 @@ mithril.js [![NPM Version](https://img.shields.io/npm/v/mithril.svg)](https://ww
## What is Mithril?
A modern client-side Javascript framework for building Single Page Applications. It's small (<!-- size -->8.74 KB<!-- /size --> gzipped), fast and provides routing and XHR utilities out of the box.
A modern client-side Javascript framework for building Single Page Applications. It's small (<!-- size -->8.34 KB<!-- /size --> gzipped), fast and provides routing and XHR utilities out of the box.
Mithril is used by companies like Vimeo and Nike, and open source platforms like Lichess 👍.

219
mithril.js
View file

@ -570,8 +570,6 @@ var coreRenderer = function($window) {
* @param {Vnode[] | null} old - the list of vnodes of the last0 `render()` call for
* this part of the tree
* @param {Vnode[] | null} vnodes - as above, but for the current `render()` call.
* @param {boolean} recyclingParent - was the parent vnode or one of its ancestor
* fetched from the recycling pool?
* @param {Function[]} hooks - an accumulator of post-render hooks (oncreate/onupdate)
* @param {Element | null} nextSibling - the next0 DOM node if we're dealing with a
* fragment that is not the last0 item in its
@ -585,8 +583,7 @@ var coreRenderer = function($window) {
//
// 1. describe its general structure
// 2. focus on the diff algorithm optimizations
// 3. describe how the recycling pool meshes into this
// 4. discuss DOM node operations.
// 3. discuss DOM node operations.
// ## Overview:
//
// The updateNodes() function:
@ -599,17 +596,13 @@ var coreRenderer = function($window) {
// - manages the leftovers: after diffing, are there:
// - old nodes left to remove?
// - new nodes to insert?
// - nodes left in the recycling pool?
// deal with them!
//
// The lists are only iterated over once, with an exception for the nodes in `old` that
// are visited in the fourth part of the diff and in the `removeNodes` loop.
// ## Diffing
//
// There's first a simple diff for unkeyed lists of equal length that eschews the pool.
//
// It is followed by a small section that activates the recycling pool if present, we'll
// ignore it for now.
// There's first a simple diff for unkeyed lists of equal length.
//
// Then comes the main diff algorithm that is split in four parts (simplifying a bit).
//
@ -637,103 +630,66 @@ var coreRenderer = function($window) {
// The range of old nodes that wasn't covered by the first three sections is passed to
// `removeNodes()`. Those nodes are removed unless marked as `.skip: true`.
//
// Then some pool business happens.
//
// It should be noted that the description of the four sections above is not perfect, because those
// parts are actually implemented as only two loops, one for the first two parts, and one for
// the other two. I'm1 not sure it wins us anything except maybe a few bytes of file size.
// ## The pool
//
// `old.pool` is an optional array that holds the vnodes that have been previously removed
// from the DOM at this level (provided they met the pool eligibility criteria).
//
// If the `old`, `old.pool` and `vnodes` meet some criteria described in `isRecyclable`, the
// elements of the pool are appended to the `old` array, which enables the reconciler to find
// them.
//
// While this is optimal for unkeyed diff and map-based keyed diff (the fourth diff part),
// that strategy clashes with the second and third parts of the main diff algo, because
// the end of the old list is now filled with the nodes of the pool.
//
// To determine if a vnode was brought back from the pool, we look at its position in the
// `old` array (see the various `oFromPool` definitions). That information is important
// in three circumstances:
// - If the old and the new vnodes are the same object (`===`), diff is not performed unless
// the old node comes from the pool (since it must be recycled/re-created).
// - The value of `oFromPool` is passed as the `recycling` parameter of `updateNode()` (whether
// the parent is being recycled is also factred in here)
// - It is used in the DOM node insertion logic (see below)
//
// At the very end of `updateNodes()`, the nodes in the pool that haven't been picked back
// are put in the new pool for the next0 render phase.
//
// The pool eligibility and `isRecyclable()` criteria are to be updated as part of #1675.
// ## DOM node operations
//
// In most cases `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), or
// if the node was brough back from the pool and both the old and new nodes have the same
// `.tag` value (when the `.tag` differ, `updateNode()` does the insertion).
// this is not the case if the node moved (second and fourth part of the diff algo).
//
// 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, recyclingParent, hooks, nextSibling, ns) {
if (old === vnodes && !recyclingParent || old == null && vnodes == null) return
function updateNodes(parent, old, vnodes, hooks, nextSibling, ns) {
if (old === vnodes || old == null && vnodes == null) return
else if (old == null) createNodes(parent, vnodes, 0, vnodes.length, hooks, nextSibling, ns)
else if (vnodes == null) removeNodes(old, 0, old.length, vnodes, recyclingParent)
else if (vnodes == null) removeNodes(old, 0, old.length)
else {
var start = 0, commonLength = Math.min(old.length, vnodes.length), originalOldLength = old.length, hasPool = false, isUnkeyed = false
var start = 0, commonLength = Math.min(old.length, vnodes.length), isUnkeyed = false
for(; start < commonLength; start++) {
if (old[start] != null && vnodes[start] != null) {
if (old[start].key == null && vnodes[start].key == null) isUnkeyed = true
break
}
}
if (isUnkeyed && originalOldLength === vnodes.length) {
for (start = 0; start < originalOldLength; start++) {
if (old[start] === vnodes[start] && !recyclingParent || old[start] == null && vnodes[start] == null) continue
else if (old[start] == null) createNode(parent, vnodes[start], hooks, ns, getNextSibling(old, start + 1, originalOldLength, nextSibling))
else if (vnodes[start] == null) removeNodes(old, start, start + 1, vnodes, recyclingParent)
else updateNode(parent, old[start], vnodes[start], hooks, getNextSibling(old, start + 1, originalOldLength, nextSibling), recyclingParent, ns)
if (isUnkeyed && old.length === vnodes.length) {
for (start = 0; start < vnodes.length; start++) {
if (old[start] === vnodes[start] || old[start] == null && vnodes[start] == null) continue
else if (old[start] == null) createNode(parent, vnodes[start], hooks, ns, getNextSibling(old, start + 1, nextSibling))
else if (vnodes[start] == null) removeNodes(old, start, start + 1)
else updateNode(parent, old[start], vnodes[start], hooks, getNextSibling(old, start + 1, nextSibling), ns)
}
return
}
if (isRecyclable(old, vnodes)) {
hasPool = true
old = old.concat(old.pool)
}
var oldStart = start = 0, oldEnd = old.length - 1, end = vnodes.length - 1, map, o, v, oFromPool
var oldStart = start = 0, oldEnd = old.length - 1, end = vnodes.length - 1, map, o, v
while (oldEnd >= oldStart && end >= start) {
o = old[oldStart]
v = vnodes[start]
oFromPool = hasPool && oldStart >= originalOldLength
if (o === v && !oFromPool && !recyclingParent || o == null && v == null) oldStart++, start++
if (o === v || o == null && v == null) oldStart++, start++
else if (o == null) {
if (isUnkeyed || v.key == null) {
createNode(parent, vnodes[start], hooks, ns, getNextSibling(old, ++start, originalOldLength, nextSibling))
createNode(parent, vnodes[start], hooks, ns, getNextSibling(old, ++start, nextSibling))
}
oldStart++
} else if (v == null) {
if (isUnkeyed || o.key == null) {
removeNodes(old, start, start + 1, vnodes, recyclingParent)
removeNodes(old, start, start + 1)
oldStart++
}
start++
} else if (o.key === v.key) {
oldStart++, start++
updateNode(parent, o, v, hooks, getNextSibling(old, oldStart, originalOldLength, nextSibling), oFromPool || recyclingParent, ns)
if (oFromPool && o.tag === v.tag) insertNode(parent, toFragment(v), nextSibling)
updateNode(parent, o, v, hooks, getNextSibling(old, oldStart, nextSibling), ns)
} else {
o = old[oldEnd]
oFromPool = hasPool && oldEnd >= originalOldLength
if (o === v && !oFromPool && !recyclingParent) oldEnd--, start++
if (o === v) oldEnd--, start++
else if (o == null) oldEnd--
else if (v == null) start++
else if (o.key === v.key) {
updateNode(parent, o, v, hooks, getNextSibling(old, oldEnd + 1, originalOldLength, nextSibling), oFromPool || recyclingParent, ns)
if (oFromPool && o.tag === v.tag || start < end) insertNode(parent, toFragment(v), getNextSibling(old, oldStart, originalOldLength, nextSibling))
updateNode(parent, o, v, hooks, getNextSibling(old, oldEnd + 1, nextSibling), ns)
if (start < end) insertNode(parent, toFragment(v), getNextSibling(old, oldStart, nextSibling))
oldEnd--, start++
}
else break
@ -742,13 +698,11 @@ var coreRenderer = function($window) {
while (oldEnd >= oldStart && end >= start) {
o = old[oldEnd]
v = vnodes[end]
oFromPool = hasPool && oldEnd >= originalOldLength
if (o === v && !oFromPool && !recyclingParent) oldEnd--, end--
if (o === v) oldEnd--, end--
else if (o == null) oldEnd--
else if (v == null) end--
else if (o.key === v.key) {
updateNode(parent, o, v, hooks, getNextSibling(old, oldEnd + 1, originalOldLength, nextSibling), oFromPool || recyclingParent, ns)
if (oFromPool && o.tag === v.tag) insertNode(parent, toFragment(v), nextSibling)
updateNode(parent, o, v, hooks, getNextSibling(old, oldEnd + 1, nextSibling), ns)
if (o.dom != null) nextSibling = o.dom
oldEnd--, end--
} else {
@ -757,8 +711,7 @@ var coreRenderer = function($window) {
var oldIndex = map[v.key]
if (oldIndex != null) {
o = old[oldIndex]
oFromPool = hasPool && oldIndex >= originalOldLength
updateNode(parent, o, v, hooks, getNextSibling(old, oldEnd + 1, originalOldLength, nextSibling), oFromPool || recyclingParent, ns)
updateNode(parent, o, v, hooks, getNextSibling(old, oldEnd + 1, nextSibling), ns)
insertNode(parent, toFragment(v), nextSibling)
o.skip = true
if (o.dom != null) nextSibling = o.dom
@ -772,43 +725,30 @@ var coreRenderer = function($window) {
if (end < start) break
}
createNodes(parent, vnodes, start, end + 1, hooks, nextSibling, ns)
removeNodes(old, oldStart, Math.min(oldEnd + 1, originalOldLength), vnodes, recyclingParent)
if (hasPool) {
var limit = Math.max(oldStart, originalOldLength)
for (; oldEnd >= limit; oldEnd--) {
if (old[oldEnd].skip) old[oldEnd].skip = false
else addToPool(old[oldEnd], vnodes)
}
}
removeNodes(old, oldStart, oldEnd + 1)
}
}
// when recycling, we're re-using an old DOM node, but firing the oninit/oncreate hooks
// instead of onbeforeupdate/onupdate.
function updateNode(parent, old, vnode, hooks, nextSibling, recycling, ns) {
function updateNode(parent, old, vnode, hooks, nextSibling, ns) {
var oldTag = old.tag, tag = vnode.tag
if (oldTag === tag) {
vnode.state = old.state
vnode.events = old.events
if (!recycling && shouldNotUpdate(vnode, old)) return
if (shouldNotUpdate(vnode, old)) return
if (typeof oldTag === "string") {
if (vnode.attrs != null) {
if (recycling) {
vnode.state = {}
initLifecycle(vnode.attrs, vnode, hooks)
}
else updateLifecycle(vnode.attrs, vnode, hooks)
updateLifecycle(vnode.attrs, vnode, hooks)
}
switch (oldTag) {
case "#": updateText(old, vnode); break
case "<": updateHTML(parent, old, vnode, ns, nextSibling); break
case "[": updateFragment(parent, old, vnode, recycling, hooks, nextSibling, ns); break
default: updateElement(old, vnode, recycling, hooks, ns)
case "[": updateFragment(parent, old, vnode, hooks, nextSibling, ns); break
default: updateElement(old, vnode, hooks, ns)
}
}
else updateComponent(parent, old, vnode, hooks, nextSibling, recycling, ns)
else updateComponent(parent, old, vnode, hooks, nextSibling, ns)
}
else {
removeNode(old, null, recycling)
removeNode(old)
createNode(parent, vnode, hooks, ns, nextSibling)
}
}
@ -825,8 +765,8 @@ var coreRenderer = function($window) {
}
else vnode.dom = old.dom, vnode.domSize = old.domSize
}
function updateFragment(parent, old, vnode, recycling, hooks, nextSibling, ns) {
updateNodes(parent, old.children, vnode.children, recycling, hooks, nextSibling, ns)
function updateFragment(parent, old, vnode, hooks, nextSibling, ns) {
updateNodes(parent, old.children, vnode.children, hooks, nextSibling, ns)
var domSize = 0, children = vnode.children
vnode.dom = null
if (children != null) {
@ -840,7 +780,7 @@ var coreRenderer = function($window) {
if (domSize !== 1) vnode.domSize = domSize
}
}
function updateElement(old, vnode, recycling, hooks, ns) {
function updateElement(old, vnode, hooks, ns) {
var element = vnode.dom = old.dom
ns = getNameSpace(vnode) || ns
if (vnode.tag === "textarea") {
@ -860,26 +800,22 @@ var coreRenderer = function($window) {
else {
if (old.text != null) old.children = [Vnode("#", undefined, undefined, old.text, undefined, old.dom.firstChild)]
if (vnode.text != null) vnode.children = [Vnode("#", undefined, undefined, vnode.text, undefined, undefined)]
updateNodes(element, old.children, vnode.children, recycling, hooks, null, ns)
updateNodes(element, old.children, vnode.children, hooks, null, ns)
}
}
function updateComponent(parent, old, vnode, hooks, nextSibling, recycling, ns) {
if (recycling) {
initComponent(vnode, hooks)
} else {
vnode.instance = Vnode.normalize(callHook.call(vnode.state.view, vnode))
if (vnode.instance === vnode) throw Error("A view cannot return the vnode it received as argument")
if (vnode.attrs != null) updateLifecycle(vnode.attrs, vnode, hooks)
updateLifecycle(vnode.state, vnode, hooks)
}
function updateComponent(parent, old, vnode, hooks, nextSibling, ns) {
vnode.instance = Vnode.normalize(callHook.call(vnode.state.view, vnode))
if (vnode.instance === vnode) throw Error("A view cannot return the vnode it received as argument")
if (vnode.attrs != null) updateLifecycle(vnode.attrs, vnode, hooks)
updateLifecycle(vnode.state, vnode, hooks)
if (vnode.instance != null) {
if (old.instance == null) createNode(parent, vnode.instance, hooks, ns, nextSibling)
else updateNode(parent, old.instance, vnode.instance, hooks, nextSibling, recycling, ns)
else updateNode(parent, old.instance, vnode.instance, hooks, nextSibling, ns)
vnode.dom = vnode.instance.dom
vnode.domSize = vnode.instance.domSize
}
else if (old.instance != null) {
removeNode(old.instance, null, recycling)
removeNode(old.instance)
vnode.dom = undefined
vnode.domSize = 0
}
@ -888,17 +824,6 @@ var coreRenderer = function($window) {
vnode.domSize = old.domSize
}
}
function isRecyclable(old, vnodes) {
if (old.pool != null && Math.abs(old.pool.length - vnodes.length) <= Math.abs(old.length - vnodes.length)) {
var oldChildrenLength = old[0] && old[0].children && old[0].children.length || 0
var poolChildrenLength = old.pool[0] && old.pool[0].children && old.pool[0].children.length || 0
var vnodesChildrenLength = vnodes[0] && vnodes[0].children && vnodes[0].children.length || 0
if (Math.abs(poolChildrenLength - vnodesChildrenLength) <= Math.abs(oldChildrenLength - vnodesChildrenLength)) {
return true
}
}
return false
}
function getKeyMap(vnodes, end) {
var map = {}, i = 0
for (var i = 0; i < end; i++) {
@ -923,10 +848,8 @@ var coreRenderer = function($window) {
}
else return vnode.dom
}
// the vnodes array may hold items that come from the pool (after `limit`) they should
// be ignored
function getNextSibling(vnodes, i, limit, nextSibling) {
for (; i < limit; i++) {
function getNextSibling(vnodes, i, nextSibling) {
for (; i < vnodes.length; i++) {
if (vnodes[i] != null && vnodes[i].dom != null) return vnodes[i].dom
}
return nextSibling
@ -944,43 +867,37 @@ var coreRenderer = function($window) {
else if (vnode.text != null || children != null && children.length !== 0) throw new Error("Child node of a contenteditable must be trusted")
}
//remove
function removeNodes(vnodes, start, end, context, recycling) {
function removeNodes(vnodes, start, end) {
for (var i = start; i < end; i++) {
var vnode = vnodes[i]
if (vnode != null) {
if (vnode.skip) vnode.skip = false
else removeNode(vnode, context, recycling)
else removeNode(vnode)
}
}
}
// when a node is removed from a parent that's brought back from the pool, its hooks should
// not fire.
function removeNode(vnode, context, recycling) {
function removeNode(vnode) {
var expected = 1, called = 0
if (!recycling) {
var original = vnode.state
if (vnode.attrs && typeof vnode.attrs.onbeforeremove === "function") {
var result = callHook.call(vnode.attrs.onbeforeremove, vnode)
if (result != null && typeof result.then === "function") {
expected++
result.then(continuation, continuation)
}
var original = vnode.state
if (vnode.attrs && typeof vnode.attrs.onbeforeremove === "function") {
var result = callHook.call(vnode.attrs.onbeforeremove, vnode)
if (result != null && typeof result.then === "function") {
expected++
result.then(continuation, continuation)
}
if (typeof vnode.tag !== "string" && typeof vnode.state.onbeforeremove === "function") {
var result = callHook.call(vnode.state.onbeforeremove, vnode)
if (result != null && typeof result.then === "function") {
expected++
result.then(continuation, continuation)
}
}
if (typeof vnode.tag !== "string" && typeof vnode.state.onbeforeremove === "function") {
var result = callHook.call(vnode.state.onbeforeremove, vnode)
if (result != null && typeof result.then === "function") {
expected++
result.then(continuation, continuation)
}
}
continuation()
function continuation() {
if (++called === expected) {
if (!recycling) {
checkState(vnode, original)
onremove(vnode)
}
checkState(vnode, original)
onremove(vnode)
if (vnode.dom) {
var count0 = vnode.domSize || 1
if (count0 > 1) {
@ -990,7 +907,6 @@ var coreRenderer = function($window) {
}
}
removeNodeFromDOM(vnode.dom)
addToPool(vnode, context)
}
}
}
@ -999,12 +915,6 @@ var coreRenderer = function($window) {
var parent = node.parentNode
if (parent != null) parent.removeChild(node)
}
function addToPool(vnode, context) {
if (context != null && vnode.domSize == null && !hasIntegrationMethods(vnode.attrs) && typeof vnode.tag === "string") { //TODO test custom elements
if (!context.pool) context.pool = [vnode]
else context.pool.push(vnode)
}
}
function onremove(vnode) {
if (vnode.attrs && typeof vnode.attrs.onremove === "function") callHook.call(vnode.attrs.onremove, vnode)
if (typeof vnode.tag !== "string") {
@ -1103,9 +1013,6 @@ var coreRenderer = function($window) {
function isCustomElement(vnode){
return vnode.attrs.is || vnode.tag.indexOf("-") > -1
}
function hasIntegrationMethods(source) {
return source != null && (source.oncreate || source.onupdate || source.onbeforeremove || source.onremove)
}
//style
function updateStyle(element, old, style) {
if (old != null && style != null && typeof old === "object" && typeof style === "object" && style !== old) {
@ -1196,7 +1103,7 @@ var coreRenderer = function($window) {
// First time rendering0 into a node clears it out
if (dom.vnodes == null) dom.textContent = ""
if (!Array.isArray(vnodes)) vnodes = [vnodes]
updateNodes(dom, dom.vnodes, Vnode.normalizeChildren(vnodes), false, hooks, null, namespace === "http://www.w3.org/1999/xhtml" ? undefined : namespace)
updateNodes(dom, dom.vnodes, Vnode.normalizeChildren(vnodes), hooks, null, namespace === "http://www.w3.org/1999/xhtml" ? undefined : namespace)
dom.vnodes = vnodes
// document.activeElement can return null in IE https://developer.mozilla.org/en-US/docs/Web/API/Document/activeElement
if (active != null && $doc.activeElement !== active) active.focus()

92
mithril.min.js vendored
View file

@ -1,47 +1,45 @@
(function(){function x(b,c,e,h,p,l){return{tag:b,key:c,attrs:e,children:h,text:p,dom:l,domSize:void 0,state:void 0,events:void 0,instance:void 0,skip:!1}}function R(b){for(var c in b)if(G.call(b,c))return!1;return!0}function w(b){var c=arguments[1],e=2;if(null==b||"string"!==typeof b&&"function"!==typeof b&&"function"!==typeof b.view)throw Error("The selector must be either a string or a component.");if("string"===typeof b){var h;if(!(h=S[b])){var p="div";for(var l=[],k={};h=W.exec(b);){var q=h[1],
t=h[2];""===q&&""!==t?p=t:"#"===q?k.id=t:"."===q?l.push(t):"["===h[3][0]&&((q=h[6])&&(q=q.replace(/\\(["'])/g,"$1").replace(/\\\\/g,"\\")),"class"===h[4]?l.push(q):k[h[4]]=""===q?q:q||!0)}0<l.length&&(k.className=l.join(" "));h=S[b]={tag:p,attrs:k}}}if(null==c)c={};else if("object"!==typeof c||null!=c.tag||Array.isArray(c))c={},e=1;if(arguments.length===e+1)p=arguments[e],Array.isArray(p)||(p=[p]);else for(p=[];e<arguments.length;)p.push(arguments[e++]);e=x.normalizeChildren(p);if("string"===typeof b){p=
!1;var m,A;l=c.className||c["class"];if(!R(h.attrs)&&!R(c)){k={};for(var a in c)G.call(c,a)&&(k[a]=c[a]);c=k}for(a in h.attrs)G.call(h.attrs,a)&&(c[a]=h.attrs[a]);void 0!==l&&(void 0!==c["class"]&&(c["class"]=void 0,c.className=l),null!=h.attrs.className&&(c.className=h.attrs.className+" "+l));for(a in c)if(G.call(c,a)&&"key"!==a){p=!0;break}Array.isArray(e)&&1===e.length&&null!=e[0]&&"#"===e[0].tag?A=e[0].children:m=e;return x(h.tag,c.key,p?c:void 0,m,A)}return x(b,c.key,c,e)}function X(b){var c=
0,e=null,h="function"===typeof requestAnimationFrame?requestAnimationFrame:setTimeout;return function(){var p=Date.now()-c;null===e&&(e=h(function(){e=null;b();c=Date.now()},16-p))}}x.normalize=function(b){return Array.isArray(b)?x("[",void 0,void 0,x.normalizeChildren(b),void 0,void 0):null!=b&&"object"!==typeof b?x("#",void 0,void 0,!1===b?"":b,void 0,void 0):b};x.normalizeChildren=function(b){for(var c=0;c<b.length;c++)b[c]=x.normalize(b[c]);return b};var W=/(?:(^|#|\.)([^#\.\[\]]+))|(\[(.+?)(?:\s*=\s*("|'|)((?:\\["'\]]|.)*?)\5)?\])/g,
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