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/*
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Based on:
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Copyright (c) 2016 Wilson Page wilsonpage@me.com
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https://github.com/wilsonpage/fastdom
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*/
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import { requestAnimationFrame } from './index';
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export const fastdom = {
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reads: [],
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writes: [],
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measure: function(task) {
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this.reads.push(task);
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scheduleFlush(this);
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return task;
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},
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mutate: function(task) {
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this.writes.push(task);
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scheduleFlush(this);
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return task;
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},
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clear: function(task) {
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return remove(this.reads, task) || remove(this.writes, task);
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}
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};
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function scheduleFlush(fastdom) {
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if (!fastdom.scheduled) {
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fastdom.scheduled = true;
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requestAnimationFrame(flush.bind(null, fastdom));
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}
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}
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function flush(fastdom) {
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runTasks(fastdom.reads);
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runTasks(fastdom.writes.splice(0, fastdom.writes.length));
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fastdom.scheduled = false;
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if (fastdom.reads.length || fastdom.writes.length) {
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scheduleFlush(fastdom);
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}
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}
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function runTasks(tasks) {
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var task;
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while (task = tasks.shift()) {
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task();
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}
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}
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function remove(array, item) {
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var index = array.indexOf(item);
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return !!~index && !!array.splice(index, 1);
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}
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