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<?php defined('SYSPATH') or die('No direct access allowed.'); |
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/** |
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* HTML helper class. |
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* |
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* $Id: html.php 4376 2009-06-01 11:40:39Z samsoir $ |
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* |
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* @package Core |
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* @author Kohana Team |
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* @copyright (c) 2007-2008 Kohana Team |
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* @license http://kohanaphp.com/license.html |
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*/ |
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class html_Core |
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{ |
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// Enable or disable automatic setting of target="_blank" |
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public static $windowed_urls = false; |
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/** |
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* Convert special characters to HTML entities |
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* |
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* @param string string to convert |
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* @param boolean encode existing entities |
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* @return string |
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*/ |
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public static function specialchars($str, $double_encode = true) |
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{ |
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// Force the string to be a string |
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$str = (string) $str; |
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// Do encode existing HTML entities (default) |
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if ($double_encode === true) { |
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$str = htmlspecialchars($str, ENT_QUOTES, 'UTF-8'); |
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} else { |
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// Do not encode existing HTML entities |
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// From PHP 5.2.3 this functionality is built-in, otherwise use a regex |
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if (version_compare(PHP_VERSION, '5.2.3', '>=')) { |
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$str = htmlspecialchars($str, ENT_QUOTES, 'UTF-8', false); |
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} else { |
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$str = preg_replace('/&(?!(?:#\d++|[a-z]++);)/ui', '&', $str); |
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$str = str_replace(array('<', '>', '\'', '"'), array('<', '>', ''', '"'), $str); |
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} |
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} |
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return $str; |
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} |
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/** |
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* Perform a html::specialchars() with additional URL specific encoding. |
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* |
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* @param string string to convert |
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* @param boolean encode existing entities |
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* @return string |
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*/ |
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public static function specialurlencode($str, $double_encode = true) |
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{ |
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return str_replace(' ', '%20', html::specialchars($str, $double_encode)); |
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} |
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/** |
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* Create HTML link anchors. |
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* |
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* @param string URL or URI string |
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* @param string link text |
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* @param array HTML anchor attributes |
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* @param string non-default protocol, eg: https |
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* @param boolean option to escape the title that is output |
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* @return string |
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*/ |
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public static function anchor($uri, $title = null, $attributes = null, $protocol = null, $escape_title = false) |
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{ |
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if ($uri === '') { |
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$site_url = url::base(false); |
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} elseif (strpos($uri, '#') === 0) { |
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// This is an id target link, not a URL |
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$site_url = $uri; |
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} elseif (strpos($uri, '://') === false) { |
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$site_url = url::site($uri, $protocol); |
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} else { |
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if (html::$windowed_urls === true and empty($attributes['target'])) { |
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$attributes['target'] = '_blank'; |
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} |
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$site_url = $uri; |
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} |
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return |
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// Parsed URL |
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'<a href="'.html::specialurlencode($site_url, false).'"' |
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// Attributes empty? Use an empty string |
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.(is_array($attributes) ? html::attributes($attributes) : '').'>' |
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// Title empty? Use the parsed URL |
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.($escape_title ? html::specialchars((($title === null) ? $site_url : $title), false) : (($title === null) ? $site_url : $title)).'</a>'; |
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} |
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/** |
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* Creates an HTML anchor to a file. |
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* |
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* @param string name of file to link to |
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* @param string link text |
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* @param array HTML anchor attributes |
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* @param string non-default protocol, eg: ftp |
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* @return string |
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*/ |
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public static function file_anchor($file, $title = null, $attributes = null, $protocol = null) |
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{ |
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return |
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// Base URL + URI = full URL |
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'<a href="'.html::specialurlencode(url::base(false, $protocol).$file, false).'"' |
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// Attributes empty? Use an empty string |
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.(is_array($attributes) ? html::attributes($attributes) : '').'>' |
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// Title empty? Use the filename part of the URI |
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.(($title === null) ? end(explode('/', $file)) : $title) .'</a>'; |
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} |
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/** |
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* Similar to anchor, but with the protocol parameter first. |
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* |
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* @param string link protocol |
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* @param string URI or URL to link to |
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* @param string link text |
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* @param array HTML anchor attributes |
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* @return string |
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*/ |
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public static function panchor($protocol, $uri, $title = null, $attributes = false) |
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{ |
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return html::anchor($uri, $title, $attributes, $protocol); |
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} |
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/** |
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* Create an array of anchors from an array of link/title pairs. |
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* |
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* @param array link/title pairs |
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* @return array |
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*/ |
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public static function anchor_array(array $array) |
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{ |
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$anchors = array(); |
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foreach ($array as $link => $title) { |
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// Create list of anchors |
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$anchors[] = html::anchor($link, $title); |
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} |
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return $anchors; |
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} |
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/** |
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* Generates an obfuscated version of an email address. |
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* |
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* @param string email address |
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* @return string |
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*/ |
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public static function email($email) |
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{ |
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$safe = ''; |
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foreach (str_split($email) as $letter) { |
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switch (($letter === '@') ? rand(1, 2) : rand(1, 3)) { |
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// HTML entity code |
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case 1: $safe .= '&#'.ord($letter).';'; break; |
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// Hex character code |
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case 2: $safe .= '&#x'.dechex(ord($letter)).';'; break; |
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// Raw (no) encoding |
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case 3: $safe .= $letter; |
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} |
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} |
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return $safe; |
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} |
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/** |
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* Creates an email anchor. |
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* |
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* @param string email address to send to |
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* @param string link text |
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* @param array HTML anchor attributes |
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* @return string |
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*/ |
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public static function mailto($email, $title = null, $attributes = null) |
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{ |
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if (empty($email)) { |
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return $title; |
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} |
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// Remove the subject or other parameters that do not need to be encoded |
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if (strpos($email, '?') !== false) { |
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// Extract the parameters from the email address |
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list($email, $params) = explode('?', $email, 2); |
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// Make the params into a query string, replacing spaces |
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$params = '?'.str_replace(' ', '%20', $params); |
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} else { |
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// No parameters |
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$params = ''; |
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} |
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// Obfuscate email address |
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$safe = html::email($email); |
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// Title defaults to the encoded email address |
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empty($title) and $title = $safe; |
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// Parse attributes |
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empty($attributes) or $attributes = html::attributes($attributes); |
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// Encoded start of the href="" is a static encoded version of 'mailto:' |
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return '<a href="mailto:'.$safe.$params.'"'.$attributes.'>'.$title.'</a>'; |
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} |
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/** |
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* Generate a "breadcrumb" list of anchors representing the URI. |
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* |
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* @param array segments to use as breadcrumbs, defaults to using Router::$segments |
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* @return string |
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*/ |
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public static function breadcrumb($segments = null) |
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{ |
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empty($segments) and $segments = Router::$segments; |
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$array = array(); |
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while ($segment = array_pop($segments)) { |
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$array[] = html::anchor( |
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// Complete URI for the URL |
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implode('/', $segments).'/'.$segment, |
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// Title for the current segment |
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ucwords(inflector::humanize($segment)) |
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); |
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} |
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// Retrun the array of all the segments |
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return array_reverse($array); |
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} |
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/** |
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* Creates a meta tag. |
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* |
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* @param string|array tag name, or an array of tags |
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* @param string tag "content" value |
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* @return string |
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*/ |
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public static function meta($tag, $value = null) |
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{ |
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if (is_array($tag)) { |
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$tags = array(); |
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foreach ($tag as $t => $v) { |
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// Build each tag and add it to the array |
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$tags[] = html::meta($t, $v); |
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} |
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// Return all of the tags as a string |
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return implode("\n", $tags); |
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} |
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// Set the meta attribute value |
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$attr = in_array(strtolower($tag), Kohana::config('http.meta_equiv')) ? 'http-equiv' : 'name'; |
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return '<meta '.$attr.'="'.$tag.'" content="'.$value.'" />'; |
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} |
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/** |
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* Creates a stylesheet link. |
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* |
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* @param string|array filename, or array of filenames to match to array of medias |
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* @param string|array media type of stylesheet, or array to match filenames |
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* @param boolean include the index_page in the link |
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* @return string |
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*/ |
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public static function stylesheet($style, $media = false, $index = false) |
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{ |
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return html::link($style, 'stylesheet', 'text/css', '.css', $media, $index); |
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} |
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/** |
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* Creates a link tag. |
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* |
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* @param string|array filename |
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* @param string|array relationship |
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* @param string|array mimetype |
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* @param string specifies suffix of the file |
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* @param string|array specifies on what device the document will be displayed |
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* @param boolean include the index_page in the link |
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* @return string |
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*/ |
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public static function link($href, $rel, $type, $suffix = false, $media = false, $index = false) |
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{ |
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$compiled = ''; |
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if (is_array($href)) { |
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foreach ($href as $_href) { |
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$_rel = is_array($rel) ? array_shift($rel) : $rel; |
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$_type = is_array($type) ? array_shift($type) : $type; |
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$_media = is_array($media) ? array_shift($media) : $media; |
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$compiled .= html::link($_href, $_rel, $_type, $suffix, $_media, $index); |
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} |
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} else { |
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if (strpos($href, '://') === false) { |
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// Make the URL absolute |
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$href = url::base($index).$href; |
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} |
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$length = strlen($suffix); |
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if ($length > 0 and substr_compare($href, $suffix, -$length, $length, false) !== 0) { |
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// Add the defined suffix |
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$href .= $suffix; |
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} |
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$attr = array( |
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'rel' => $rel, |
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'type' => $type, |
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'href' => $href, |
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); |
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if (! empty($media)) { |
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// Add the media type to the attributes |
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$attr['media'] = $media; |
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} |
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$compiled = '<link'.html::attributes($attr).' />'; |
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} |
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return $compiled."\n"; |
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} |
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/** |
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* Creates a script link. |
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* |
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* @param string|array filename |
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* @param boolean include the index_page in the link |
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* @return string |
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*/ |
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public static function script($script, $index = false) |
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{ |
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$compiled = ''; |
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if (is_array($script)) { |
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foreach ($script as $name) { |
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$compiled .= html::script($name, $index); |
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} |
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} else { |
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if (strpos($script, '://') === false) { |
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// Add the suffix only when it's not already present |
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$script = url::base((bool) $index).$script; |
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} |
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if (substr_compare($script, '.js', -3, 3, false) !== 0) { |
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// Add the javascript suffix |
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$script .= '.js'; |
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} |
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$compiled = '<script type="text/javascript" src="'.$script.'"></script>'; |
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} |
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return $compiled."\n"; |
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} |
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/** |
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* Creates a image link. |
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* |
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* @param string image source, or an array of attributes |
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* @param string|array image alt attribute, or an array of attributes |
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* @param boolean include the index_page in the link |
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* @return string |
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*/ |
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public static function image($src = null, $alt = null, $index = false) |
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{ |
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// Create attribute list |
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$attributes = is_array($src) ? $src : array('src' => $src); |
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if (is_array($alt)) { |
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$attributes += $alt; |
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|
} elseif (! empty($alt)) { |
371
|
|
|
// Add alt to attributes |
372
|
|
|
$attributes['alt'] = $alt; |
373
|
|
|
} |
374
|
|
|
|
375
|
|
|
if (strpos($attributes['src'], '://') === false) { |
376
|
|
|
// Make the src attribute into an absolute URL |
377
|
|
|
$attributes['src'] = url::base($index).$attributes['src']; |
378
|
|
|
} |
379
|
|
|
|
380
|
|
|
return '<img'.html::attributes($attributes).' />'; |
381
|
|
|
} |
382
|
|
|
|
383
|
|
|
/** |
384
|
|
|
* Compiles an array of HTML attributes into an attribute string. |
385
|
|
|
* |
386
|
|
|
* @param string|array array of attributes |
387
|
|
|
* @return string |
388
|
|
|
*/ |
389
|
|
|
public static function attributes($attrs) |
390
|
|
|
{ |
391
|
|
|
if (empty($attrs)) { |
392
|
|
|
return ''; |
393
|
|
|
} |
394
|
|
|
|
395
|
|
|
if (is_string($attrs)) { |
396
|
|
|
return ' '.$attrs; |
397
|
|
|
} |
398
|
|
|
|
399
|
|
|
$compiled = ''; |
400
|
|
|
foreach ($attrs as $key => $val) { |
401
|
|
|
$compiled .= ' '.$key.'="'.html::specialchars($val).'"'; |
402
|
|
|
} |
403
|
|
|
|
404
|
|
|
return $compiled; |
405
|
|
|
} |
406
|
|
|
} // End html |
407
|
|
|
|