discourse/app/assets/javascripts/discourse-common/lib/buffered-render.js.es6

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// Ember 2.0 removes buffered rendering, but we can still implement it ourselves.
// In the long term we'll want to remove this.
const Mixin = {
_customRender() {
if (!this.element || this.isDestroying || this.isDestroyed) { return; }
const buffer = [];
this.buildBuffer(buffer);
this.element.innerHTML = buffer.join('');
},
rerenderBuffer() {
Ember.run.scheduleOnce('render', this, this._customRender);
}
};
export function bufferedRender(obj) {
if (!obj.buildBuffer) {
Ember.warn('Missing `buildBuffer` method');
return obj;
}
const caller = { };
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caller.didRender = function() {
this._super();
this._customRender();
};
const triggers = obj.rerenderTriggers;
if (triggers) {
caller.init = function() {
this._super();
triggers.forEach(k => this.addObserver(k, this.rerenderBuffer));
};
}
delete obj.rerenderTriggers;
return Ember.Mixin.create(Mixin, caller, obj);
}