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Filename : url.php
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<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Form
 *
 * @copyright   Copyright (C) 2005 - 2016 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

JFormHelper::loadFieldClass('text');

/**
 * Form Field class for the Joomla Platform.
 * Supports a URL text field
 *
 * @link   http://www.w3.org/TR/html-markup/input.url.html#input.url
 * @see    JFormRuleUrl for validation of full urls
 * @since  11.1
 */
class JFormFieldUrl extends JFormFieldText
{
	/**
	 * The form field type.
	 *
	 * @var    string
	 * @since  11.1
	 */
	protected $type = 'Url';

	/**
	 * Method to get the field input markup.
	 *
	 * @return  string  The field input markup.
	 *
	 * @since   3.1.2 (CMS)
	 */
	protected function getInput()
	{
		// Translate placeholder text
		$hint = $this->translateHint ? JText::_($this->hint) : $this->hint;

		// Initialize some field attributes.
		$size         = !empty($this->size) ? ' size="' . $this->size . '"' : '';
		$maxLength    = !empty($this->maxLength) ? ' maxlength="' . $this->maxLength . '"' : '';
		$class        = !empty($this->class) ? ' class="' . $this->class . '"' : '';
		$readonly     = $this->readonly ? ' readonly' : '';
		$disabled     = $this->disabled ? ' disabled' : '';
		$required     = $this->required ? ' required aria-required="true"' : '';
		$hint         = $hint ? ' placeholder="' . $hint . '"' : '';
		$autocomplete = !$this->autocomplete ? ' autocomplete="off"' : ' autocomplete="' . $this->autocomplete . '"';
		$autocomplete = $autocomplete == ' autocomplete="on"' ? '' : $autocomplete;
		$autofocus    = $this->autofocus ? ' autofocus' : '';
		$spellcheck   = $this->spellcheck ? '' : ' spellcheck="false"';

		// Note that the input type "url" is suitable only for external URLs, so if internal URLs are allowed
		// we have to use the input type "text" instead.
		$inputType    = $this->element['relative'] ? 'type="text"' : 'type="url"';

		// Initialize JavaScript field attributes.
		$onchange = !empty($this->onchange) ? ' onchange="' . $this->onchange . '"' : '';

		// Including fallback code for HTML5 non supported browsers.
		JHtml::_('jquery.framework');
		JHtml::_('script', 'system/html5fallback.js', false, true);

		return '<input ' . $inputType . ' name="' . $this->name . '"' . $class . ' id="' . $this->id . '" value="'
			. htmlspecialchars(JStringPunycode::urlToUTF8($this->value), ENT_COMPAT, 'UTF-8') . '"' . $size . $disabled . $readonly
			. $hint . $autocomplete . $autofocus . $spellcheck . $onchange . $maxLength . $required . ' />';
	}
}