vndb/mithril-vndb
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

improve dom caching

Browse source 
- don't call appendChild if not needed
- don't overwrite style all the time
- don't overwrite function if it has same source
This commit is contained in:
Leo Horie 2014-04-03 09:00:47 -04:00
parent e34cc1fc4a
commit efae454bd4
5 changed files with 33 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

23
mithril.js
View file

@ -73,7 +73,7 @@ new function(window) {
setAttributes(node, data.attrs, cached.attrs)
cached.children = build(node, data.children, cached.children)
cached.nodes.intact = true
parent.appendChild(node)
if (node.parentNode !== parent) parent.appendChild(node)
}
if (type.call(data.attrs["config"]) == "[object Function]") data.attrs["config"](node, !isNew)
}
@ -120,13 +120,20 @@ new function(window) {
function setAttributes(node, dataAttrs, cachedAttrs) {
for (var attrName in dataAttrs) {
var dataAttr = dataAttrs[attrName]
if (!(attrName in cachedAttrs) || (cachedAttrs[attrName] !== dataAttr) || node === window.document.activeElement) {
cachedAttrs[attrName] = dataAttr
if (attrName == "config") continue
if (attrName.indexOf("on") == 0 && typeof dataAttr == "function") dataAttr = autoredraw(dataAttr, node)
if (attrName == "style") for (var rule in dataAttr) node.style[rule] = dataAttr[rule]
var cachedAttr = cachedAttrs[attrName]
if (!(attrName in cachedAttrs) || (cachedAttr !== dataAttr) || node === window.document.activeElement) {
if (attrName === "config") continue
else if (typeof dataAttr == "function" && attrName.indexOf("on") == 0) {
if (String(dataAttr) !== String(cachedAttr)) node[attrName] = autoredraw(dataAttr, node)
}
else if (attrName === "style") {
for (var rule in dataAttr) {
if (cachedAttr === undefined || cachedAttr[rule] !== dataAttr[rule]) node.style[rule] = dataAttr[rule]
}
}
else if (attrName in node) node[attrName] = dataAttr
else node.setAttribute(attrName, dataAttr)
cachedAttrs[attrName] = dataAttr
}
}
return cachedAttrs
@ -141,9 +148,9 @@ new function(window) {
return result
}
function autoredraw(callback, object) {
return function() {
return function(e) {
m.startComputation()
var output = callback.apply(object || window, arguments)
var output = callback.call(object, e)
m.endComputation()
return output
}