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<?php |
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namespace Caxy\HtmlDiff; |
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/** |
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* Class AbstractDiff. |
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*/ |
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abstract class AbstractDiff |
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{ |
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/** |
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* @var array |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public static $defaultSpecialCaseTags = array('strong', 'b', 'i', 'big', 'small', 'u', 'sub', 'sup', 'strike', 's', 'p'); |
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/** |
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* @var array |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public static $defaultSpecialCaseChars = array('.', ',', '(', ')', '\''); |
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/** |
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* @var bool |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public static $defaultGroupDiffs = true; |
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/** |
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* @var HtmlDiffConfig |
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*/ |
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protected $config; |
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/** |
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* @var string |
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*/ |
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protected $content; |
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/** |
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* @var string |
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*/ |
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protected $oldText; |
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/** |
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* @var string |
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*/ |
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protected $newText; |
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/** |
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* @var array |
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*/ |
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protected $oldWords = array(); |
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/** |
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* @var array |
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*/ |
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protected $newWords = array(); |
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/** |
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* @var DiffCache[] |
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*/ |
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protected $diffCaches = array(); |
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/** |
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* @var \HTMLPurifier |
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*/ |
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protected $purifier; |
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/** |
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* @var \HTMLPurifier_Config|null |
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*/ |
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protected $purifierConfig = null; |
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/** |
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* @see array_slice_cached(); |
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* @var bool |
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*/ |
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protected $resetCache = false; |
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/** |
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* AbstractDiff constructor. |
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* |
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* @param string $oldText |
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* @param string $newText |
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* @param string $encoding |
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* @param null|array $specialCaseTags |
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* @param null|bool $groupDiffs |
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*/ |
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public function __construct($oldText, $newText, $encoding = 'UTF-8', $specialCaseTags = null, $groupDiffs = null) |
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{ |
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mb_substitute_character(0x20); |
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$this->setConfig(HtmlDiffConfig::create()->setEncoding($encoding)); |
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if ($specialCaseTags !== null) { |
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$this->config->setSpecialCaseTags($specialCaseTags); |
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} |
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if ($groupDiffs !== null) { |
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$this->config->setGroupDiffs($groupDiffs); |
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} |
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$this->oldText = $oldText; |
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$this->newText = $newText; |
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$this->content = ''; |
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} |
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/** |
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* @return bool|string |
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*/ |
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abstract public function build(); |
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/** |
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* Initializes HTMLPurifier with cache location. |
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* |
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* @param null|string $defaultPurifierSerializerCache |
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*/ |
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public function initPurifier($defaultPurifierSerializerCache = null) |
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{ |
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if (null !== $this->purifierConfig) { |
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$HTMLPurifierConfig = $this->purifierConfig; |
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} else { |
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$HTMLPurifierConfig = \HTMLPurifier_Config::createDefault(); |
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} |
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// Cache.SerializerPath defaults to Null and sets |
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// the location to inside the vendor HTMLPurifier library |
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// under the DefinitionCache/Serializer folder. |
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if (!is_null($defaultPurifierSerializerCache)) { |
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$HTMLPurifierConfig->set('Cache.SerializerPath', $defaultPurifierSerializerCache); |
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} |
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// Cache.SerializerPermissions defaults to 0744. |
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// This setting allows the cache files to be deleted by any user, as they are typically |
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// created by the web/php user (www-user, php-fpm, etc.) |
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$HTMLPurifierConfig->set('Cache.SerializerPermissions', 0777); |
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$this->purifier = new \HTMLPurifier($HTMLPurifierConfig); |
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} |
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/** |
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* Prepare (purify) the HTML |
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* |
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* @return void |
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*/ |
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protected function prepare() |
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{ |
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$this->initPurifier($this->config->getPurifierCacheLocation()); |
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$this->oldText = $this->purifyHtml($this->oldText); |
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$this->newText = $this->purifyHtml($this->newText); |
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} |
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/** |
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* @return DiffCache|null |
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*/ |
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protected function getDiffCache() |
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{ |
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if (!$this->hasDiffCache()) { |
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return null; |
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} |
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$hash = spl_object_hash($this->getConfig()->getCacheProvider()); |
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if (!array_key_exists($hash, $this->diffCaches)) { |
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$this->diffCaches[$hash] = new DiffCache($this->getConfig()->getCacheProvider()); |
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} |
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return $this->diffCaches[$hash]; |
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} |
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/** |
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* @return bool |
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*/ |
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protected function hasDiffCache() |
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{ |
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return null !== $this->getConfig()->getCacheProvider(); |
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} |
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/** |
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* @return HtmlDiffConfig |
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*/ |
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public function getConfig() |
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{ |
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return $this->config; |
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} |
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/** |
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* @param HtmlDiffConfig $config |
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* |
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* @return AbstractDiff |
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*/ |
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public function setConfig(HtmlDiffConfig $config) |
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{ |
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$this->config = $config; |
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return $this; |
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} |
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/** |
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* @return int |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public function getMatchThreshold() |
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{ |
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return $this->config->getMatchThreshold(); |
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} |
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/** |
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* @param int $matchThreshold |
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* |
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* @return AbstractDiff |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public function setMatchThreshold($matchThreshold) |
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{ |
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$this->config->setMatchThreshold($matchThreshold); |
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return $this; |
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} |
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/** |
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* @param array $chars |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public function setSpecialCaseChars(array $chars) |
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{ |
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$this->config->setSpecialCaseChars($chars); |
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} |
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/** |
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* @return array|null |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public function getSpecialCaseChars() |
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{ |
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return $this->config->getSpecialCaseChars(); |
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} |
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/** |
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* @param string $char |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public function addSpecialCaseChar($char) |
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{ |
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$this->config->addSpecialCaseChar($char); |
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} |
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/** |
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* @param string $char |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public function removeSpecialCaseChar($char) |
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{ |
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$this->config->removeSpecialCaseChar($char); |
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} |
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/** |
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* @param array $tags |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public function setSpecialCaseTags(array $tags = array()) |
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{ |
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$this->config->setSpecialCaseChars($tags); |
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} |
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/** |
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* @param string $tag |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public function addSpecialCaseTag($tag) |
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{ |
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$this->config->addSpecialCaseTag($tag); |
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} |
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/** |
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* @param string $tag |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public function removeSpecialCaseTag($tag) |
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{ |
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$this->config->removeSpecialCaseTag($tag); |
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} |
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/** |
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* @return array|null |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public function getSpecialCaseTags() |
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{ |
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return $this->config->getSpecialCaseTags(); |
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} |
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/** |
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* @return string |
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*/ |
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public function getOldHtml() |
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{ |
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return $this->oldText; |
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} |
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/** |
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* @return string |
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*/ |
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public function getNewHtml() |
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{ |
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return $this->newText; |
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} |
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/** |
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* @return string |
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*/ |
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public function getDifference() |
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{ |
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return $this->content; |
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} |
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/** |
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* Clears the diff content. |
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* |
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* @return void |
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*/ |
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public function clearContent() |
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{ |
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$this->content = null; |
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} |
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/** |
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* @param bool $boolean |
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* |
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* @return $this |
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* |
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* @deprecated since 0.1.0 |
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*/ |
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public function setGroupDiffs($boolean) |
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{ |
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$this->config->setGroupDiffs($boolean); |
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return $this; |
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} |
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/** |
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* @return bool |
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* |
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* @deprecated since 0.1.0 |
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*/ |
359
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15 |
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public function isGroupDiffs() |
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{ |
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15 |
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return $this->config->isGroupDiffs(); |
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} |
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364
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/** |
365
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* @param \HTMLPurifier_Config $config |
366
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*/ |
367
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2 |
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public function setHTMLPurifierConfig(\HTMLPurifier_Config $config) |
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{ |
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2 |
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$this->purifierConfig = $config; |
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} |
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/** |
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* @param string $tag |
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* |
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* @return string |
376
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*/ |
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protected function getOpeningTag($tag) |
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{ |
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return '/<'.$tag.'[^>]*/i'; |
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} |
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382
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/** |
383
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* @param string $tag |
384
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* |
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* @return string |
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*/ |
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protected function getClosingTag($tag) |
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{ |
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return '</'.$tag.'>'; |
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} |
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392
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/** |
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* @param string $str |
394
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* @param string $start |
395
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* @param string $end |
396
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* |
397
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* @return string |
398
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*/ |
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protected function getStringBetween($str, $start, $end) |
400
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{ |
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$expStr = mb_split($start, $str, 2); |
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if (count($expStr) > 1) { |
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$expStr = mb_split($end, $expStr[ 1 ]); |
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if (count($expStr) > 1) { |
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array_pop($expStr); |
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return implode($end, $expStr); |
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} |
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} |
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return ''; |
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} |
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414
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/** |
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* @param string $html |
416
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* |
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* @return string |
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418
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|
|
*/ |
419
|
15 |
|
protected function purifyHtml($html) |
420
|
|
|
{ |
421
|
15 |
|
if (class_exists('Tidy') && false) { |
422
|
|
|
$config = array('output-xhtml' => true, 'indent' => false); |
423
|
|
|
$tidy = new tidy(); |
424
|
|
|
$tidy->parseString($html, $config, 'utf8'); |
425
|
|
|
$html = (string) $tidy; |
426
|
|
|
|
427
|
|
|
return $this->getStringBetween($html, '<body>'); |
|
|
|
|
428
|
|
|
} |
429
|
|
|
|
430
|
15 |
|
return $this->purifier->purify($html); |
431
|
|
|
} |
432
|
|
|
|
433
|
15 |
|
protected function splitInputsToWords() |
434
|
|
|
{ |
435
|
15 |
|
$this->setOldWords($this->convertHtmlToListOfWords($this->explode($this->oldText))); |
436
|
15 |
|
$this->setNewWords($this->convertHtmlToListOfWords($this->explode($this->newText))); |
437
|
15 |
|
} |
438
|
|
|
|
439
|
|
|
/** |
440
|
|
|
* @param array $oldWords |
441
|
|
|
*/ |
442
|
15 |
|
protected function setOldWords(array $oldWords) |
443
|
|
|
{ |
444
|
15 |
|
$this->resetCache = true; |
445
|
15 |
|
$this->oldWords = $oldWords; |
446
|
15 |
|
} |
447
|
|
|
|
448
|
|
|
/** |
449
|
|
|
* @param array $newWords |
450
|
|
|
*/ |
451
|
15 |
|
protected function setNewWords(array $newWords) |
452
|
|
|
{ |
453
|
15 |
|
$this->resetCache = true; |
454
|
15 |
|
$this->newWords = $newWords; |
455
|
15 |
|
} |
456
|
|
|
|
457
|
|
|
/** |
458
|
|
|
* @param string $text |
459
|
|
|
* |
460
|
|
|
* @return bool |
|
|
|
|
461
|
|
|
*/ |
462
|
15 |
|
protected function isPartOfWord($text) |
463
|
|
|
{ |
464
|
15 |
|
return $this->ctypeAlphanumUnicode(str_replace($this->config->getSpecialCaseChars(), '', $text)); |
465
|
|
|
} |
466
|
|
|
|
467
|
|
|
/** |
468
|
|
|
* @param array $characterString |
469
|
|
|
* |
470
|
|
|
* @return array |
471
|
|
|
*/ |
472
|
15 |
|
protected function convertHtmlToListOfWords($characterString) |
473
|
|
|
{ |
474
|
15 |
|
$mode = 'character'; |
475
|
15 |
|
$current_word = ''; |
476
|
15 |
|
$words = array(); |
477
|
15 |
|
$keepNewLines = $this->getConfig()->isKeepNewLines(); |
478
|
15 |
|
foreach ($characterString as $i => $character) { |
479
|
|
|
switch ($mode) { |
480
|
15 |
|
case 'character': |
481
|
15 |
|
if ($this->isStartOfTag($character)) { |
482
|
14 |
|
if ($current_word != '') { |
483
|
13 |
|
$words[] = $current_word; |
484
|
|
|
} |
485
|
|
|
|
486
|
14 |
|
$current_word = '<'; |
487
|
14 |
|
$mode = 'tag'; |
488
|
15 |
|
} elseif (preg_match("/\s/u", $character)) { |
489
|
13 |
|
if ($current_word !== '') { |
490
|
13 |
|
$words[] = $current_word; |
491
|
|
|
} |
492
|
13 |
|
$current_word = $keepNewLines ? $character : preg_replace('/\s+/Su', ' ', $character); |
493
|
13 |
|
$mode = 'whitespace'; |
494
|
|
|
} else { |
495
|
|
|
if ( |
496
|
15 |
|
(($this->ctypeAlphanumUnicode($character)) && (mb_strlen($current_word) == 0 || $this->isPartOfWord($current_word))) || |
|
|
|
|
497
|
11 |
|
(in_array($character, $this->config->getSpecialCaseChars()) && isset($characterString[$i + 1]) && $this->isPartOfWord($characterString[$i + 1])) |
|
|
|
|
498
|
|
|
) { |
499
|
15 |
|
$current_word .= $character; |
500
|
|
|
} else { |
501
|
11 |
|
$words[] = $current_word; |
502
|
11 |
|
$current_word = $character; |
503
|
|
|
} |
504
|
|
|
} |
505
|
15 |
|
break; |
506
|
15 |
|
case 'tag' : |
|
|
|
|
507
|
15 |
|
if ($this->isEndOfTag($character)) { |
508
|
15 |
|
$current_word .= '>'; |
509
|
15 |
|
$words[] = $current_word; |
510
|
15 |
|
$current_word = ''; |
511
|
|
|
|
512
|
15 |
|
if (!preg_match('[^\s]u', $character)) { |
513
|
15 |
|
$mode = 'whitespace'; |
514
|
|
|
} else { |
515
|
|
|
$mode = 'character'; |
516
|
|
|
} |
517
|
|
|
} else { |
518
|
15 |
|
$current_word .= $character; |
519
|
|
|
} |
520
|
15 |
|
break; |
521
|
15 |
|
case 'whitespace': |
522
|
15 |
|
if ($this->isStartOfTag($character)) { |
523
|
13 |
|
if ($current_word !== '') { |
524
|
13 |
|
$words[] = $current_word; |
525
|
|
|
} |
526
|
13 |
|
$current_word = '<'; |
527
|
13 |
|
$mode = 'tag'; |
528
|
15 |
|
} elseif (preg_match("/\s/u", $character)) { |
529
|
11 |
|
$current_word .= $character; |
530
|
11 |
|
if (!$keepNewLines) $current_word = preg_replace('/\s+/Su', ' ', $current_word); |
531
|
|
|
} else { |
532
|
15 |
|
if ($current_word != '') { |
533
|
12 |
|
$words[] = $current_word; |
534
|
|
|
} |
535
|
15 |
|
$current_word = $character; |
536
|
15 |
|
$mode = 'character'; |
537
|
|
|
} |
538
|
15 |
|
break; |
539
|
|
|
default: |
540
|
|
|
break; |
541
|
|
|
} |
542
|
|
|
} |
543
|
15 |
|
if ($current_word != '') { |
544
|
7 |
|
$words[] = $current_word; |
545
|
|
|
} |
546
|
|
|
|
547
|
15 |
|
return $words; |
548
|
|
|
} |
549
|
|
|
|
550
|
|
|
/** |
551
|
|
|
* @param string $val |
552
|
|
|
* |
553
|
|
|
* @return bool |
554
|
|
|
*/ |
555
|
15 |
|
protected function isStartOfTag($val) |
556
|
|
|
{ |
557
|
15 |
|
return $val == '<'; |
558
|
|
|
} |
559
|
|
|
|
560
|
|
|
/** |
561
|
|
|
* @param string $val |
562
|
|
|
* |
563
|
|
|
* @return bool |
564
|
|
|
*/ |
565
|
15 |
|
protected function isEndOfTag($val) |
566
|
|
|
{ |
567
|
15 |
|
return $val == '>'; |
568
|
|
|
} |
569
|
|
|
|
570
|
|
|
/** |
571
|
|
|
* @param string $value |
572
|
|
|
* |
573
|
|
|
* @return bool |
574
|
|
|
*/ |
575
|
|
|
protected function isWhiteSpace($value) |
576
|
|
|
{ |
577
|
|
|
return !preg_match('[^\s]u', $value); |
578
|
|
|
} |
579
|
|
|
|
580
|
|
|
/** |
581
|
|
|
* @param string $value |
582
|
|
|
* |
583
|
|
|
* @return array |
584
|
|
|
*/ |
585
|
15 |
|
protected function explode($value) |
586
|
|
|
{ |
587
|
|
|
// as suggested by @onassar |
588
|
15 |
|
return preg_split('//u', $value, -1, PREG_SPLIT_NO_EMPTY); |
589
|
|
|
} |
590
|
|
|
|
591
|
|
|
/** |
592
|
|
|
* @param string $str |
593
|
|
|
* |
594
|
|
|
* @return bool |
|
|
|
|
595
|
|
|
*/ |
596
|
15 |
|
protected function ctypeAlphanumUnicode($str) |
597
|
|
|
{ |
598
|
15 |
|
return preg_match("/^[a-zA-Z0-9\pL]+$/u", $str); |
599
|
|
|
} |
600
|
|
|
} |
601
|
|
|
|
Overly long lines are hard to read on any screen. Most code styles therefor impose a maximum limit on the number of characters in a line.