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

47 lines
1.1 KiB
JavaScript

import { scheduleOnce } from "@ember/runloop";
// 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() {
scheduleOnce("render", this, this._customRender);
}
};
export function bufferedRender(obj) {
if (!obj.buildBuffer) {
Ember.warn("Missing `buildBuffer` method", {
id: "discourse.buffered-render.missing-build-buffer"
});
return obj;
}
const caller = {};
caller.didRender = function() {
this._super(...arguments);
this._customRender();
};
const triggers = obj.rerenderTriggers;
if (triggers) {
caller.init = function() {
this._super(...arguments);
triggers.forEach(k => this.addObserver(k, this.rerenderBuffer));
};
}
delete obj.rerenderTriggers;
return Ember.Mixin.create(Mixin, caller, obj);
}