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Blaze.Isolate does basic deduping

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This commit is contained in:
David Greenspan
2014-06-09 14:29:29 -07:00
parent 9108c5debd
commit 142af3a38f
1 changed files with 18 additions and 2 deletions
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20
packages/blaze/render.js
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@@ -6,6 +6,18 @@ var _onstopForRender = function () {
Blaze.RenderController = Blaze.Controller.extend();
var contentEquals = function (a, b) {
if (a instanceof HTML.Raw) {
return (b instanceof HTML.Raw) && (a.value === b.value);
} else if (a == null) {
return (b == null);
} else {
return (a === b) &&
((typeof a === 'number') || (typeof a === 'boolean') ||
(typeof a === 'string'));
}
};
// Takes a function that returns HTMLjs and returns a DOMRange.
// The function will be reactively re-run. The resulting DOMRange
// may be attached to the DOM using `.attach(parentElement, [nextNode])`.
@@ -15,10 +27,14 @@ Blaze.render = function (func) {
if (! controller)
controller = new Blaze.RenderController;
range.computation = Deps.autorun(function () {
var oldContent;
range.computation = Deps.autorun(function (c) {
Blaze.withCurrentController(controller, function () {
var content = func();
range.setMembers(Blaze.toDOM(content));
if (c.firstRun || ! contentEquals(oldContent, content)) {
oldContent = content;
range.setMembers(Blaze.toDOM(content));
}
});
});
Blaze._wrapAutorun(range.computation);