PhabricatorHigherOrderChartFunction.php
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PhabricatorHigherOrderChartFunction.php
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			<?php

			abstract class PhabricatorHigherOrderChartFunction
			extends PhabricatorChartFunction {

			public function getDomain() {
			$minv = array();
			$maxv = array();
			foreach ($this->getFunctionArguments() as $function) {
			$domain = $function->getDomain();
			if ($domain !== null) {
			list($min, $max) = $domain;
			if ($min !== null) {
			$minv[] = $min;
			}
			if ($max !== null) {
			$maxv[] = $max;
			}
			}
			}

			if (!$minv && !$maxv) {
			return null;
			}

			$min = null;
			$max = null;

			if ($minv) {
			$min = min($minv);
			}

			if ($maxv) {
			$max = max($maxv);
			}

			return array($min, $max);
			}

			public function newInputValues(PhabricatorChartDataQuery $query) {
			$map = array();
			foreach ($this->getFunctionArguments() as $function) {
			$xv = $function->newInputValues($query);
			if ($xv !== null) {
			foreach ($xv as $x) {
			$map[$x] = true;
			}
			}
			}

			if (!$map) {
			return null;
			}

			ksort($map);

			return array_keys($map);
			}

			}