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AphrontFormHandlesControl.php
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			<?php

			final class AphrontFormHandlesControl extends AphrontFormControl {

			private $isInvisible;

			protected function getCustomControlClass() {
			return 'aphront-form-control-handles';
			}

			public function setIsInvisible($is_invisible) {
			$this->isInvisible = $is_invisible;
			return $this;
			}

			public function getIsInvisible() {
			return $this->isInvisible;
			}

			protected function shouldRender() {
			return (bool)$this->getValue();
			}

			public function getLabel() {
			// TODO: This is a bit funky and still rendering a few pixels of padding
			// on the form, but there's currently no way to get a control to only emit
			// hidden inputs. Clean this up eventually.

			if ($this->getIsInvisible()) {
			return null;
			}

			return parent::getLabel();
			}

			protected function renderInput() {
			$value = $this->getValue();
			$viewer = $this->getUser();

			$out = array();

			if (!$this->getIsInvisible()) {
			$list = $viewer->renderHandleList($value);
			$list = id(new PHUIBoxView())
			->addPadding(PHUI::PADDING_SMALL_TOP)
			->appendChild($list);
			$out[] = $list;
			}

			$inputs = array();
			foreach ($value as $phid) {
			$inputs[] = phutil_tag(
			'input',
			array(
			'type' => 'hidden',
			'name' => $this->getName().'[]',
			'value' => $phid,
			));
			}
			$out[] = $inputs;

			return $out;
			}

			}