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<?php
/**
* @package s9e\TextFormatter
* @copyright Copyright (c) 2010-2022 The s9e authors
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
namespace s9e\TextFormatter\Plugins\Emoticons;
use ArrayAccess;
use Countable;
use Iterator;
use s9e\TextFormatter\Configurator\Helpers\ConfigHelper;
use s9e\TextFormatter\Configurator\Helpers\RegexpBuilder;
use s9e\TextFormatter\Configurator\Items\Regexp;
use s9e\TextFormatter\Configurator\JavaScript\RegexpConvertor;
use s9e\TextFormatter\Configurator\Traits\CollectionProxy;
use s9e\TextFormatter\Plugins\ConfiguratorBase;
use s9e\TextFormatter\Plugins\Emoticons\Configurator\EmoticonCollection;
use s9e\TextFormatter\Utils\XPath;
/**
* @method mixed add(string $key, mixed $value) Add an item to this collection
* @method array asConfig()
* @method void clear() Empty this collection
* @method bool contains(mixed $value) Test whether a given value is present in this collection
* @method integer count()
* @method mixed current()
* @method void delete(string $key) Delete an item from this collection
* @method bool exists(string $key) Test whether an item of given key exists
* @method mixed get(string $key) Return a value from this collection
* @method mixed indexOf(mixed $value) Find the index of a given value
* @method integer|string key()
* @method mixed next()
* @method string normalizeKey(string $key) Normalize an item's key
* @method string normalizeValue(string $value) Normalize an emoticon's template
* @method bool offsetExists(string|integer $offset)
* @method mixed offsetGet(string|integer $offset)
* @method void offsetSet(string|integer $offset, mixed $value)
* @method void offsetUnset(string|integer $offset)
* @method string onDuplicate(string|null $action) Query and set the action to take when add() is called with a key that already exists
* @method void rewind()
* @method mixed set(string $key, mixed $value) Set and overwrite a value in this collection
* @method bool valid()
*/
class Configurator extends ConfiguratorBase implements ArrayAccess, Countable, Iterator
{
use CollectionProxy;
/**
* @var EmoticonCollection
*/
protected $collection;
/**
* @var string PCRE subpattern used in a negative lookbehind assertion before the emoticons
*/
public $notAfter = '';
/**
* @var string PCRE subpattern used in a negative lookahead assertion after the emoticons
*/
public $notBefore = '';
/**
* @var string XPath expression that, if true, forces emoticons to be rendered as text
*/
public $notIfCondition;
/**
* {@inheritdoc}
*/
protected $onDuplicateAction = 'replace';
/**
* @var string Name of the tag used by this plugin
*/
protected $tagName = 'E';
/**
* Plugin's setup
*
* Will create the tag used by this plugin
*/
protected function setUp()
{
$this->collection = new EmoticonCollection;
if (!$this->configurator->tags->exists($this->tagName))
{
$this->configurator->tags->add($this->tagName);
}
}
/**
* Create the template used for emoticons
*
* @return void
*/
public function finalize()
{
$tag = $this->getTag();
if (!isset($tag->template))
{
$tag->template = $this->getTemplate();
}
}
/**
* @return array
*/
public function asConfig()
{
if (!count($this->collection))
{
return;
}
// Grab the emoticons from the collection
$codes = array_keys(iterator_to_array($this->collection));
// Build the regexp used to match emoticons
$regexp = '/';
if ($this->notAfter !== '')
{
$regexp .= '(?<!' . $this->notAfter . ')';
}
$regexp .= RegexpBuilder::fromList($codes);
if ($this->notBefore !== '')
{
$regexp .= '(?!' . $this->notBefore . ')';
}
$regexp .= '/S';
// Set the Unicode mode if Unicode properties are used
if (preg_match('/\\\\[pP](?>\\{\\^?\\w+\\}|\\w\\w?)/', $regexp))
{
$regexp .= 'u';
}
// Force the regexp to use atomic grouping for performance
$regexp = preg_replace('/(?<!\\\\)((?>\\\\\\\\)*)\\(\\?:/', '$1(?>', $regexp);
// Prepare the config array
$config = [
'quickMatch' => $this->quickMatch,
'regexp' => $regexp,
'tagName' => $this->tagName
];
// If notAfter is used, we need to create a JavaScript-specific regexp that does not use a
// lookbehind assertion, and we add the notAfter subpattern to the config as a variant
if ($this->notAfter !== '')
{
// Skip the first assertion by skipping the first N characters, where N equals the
// length of $this->notAfter plus 1 for the first "/" and 5 for "(?<!)"
$lpos = 6 + strlen($this->notAfter);
$rpos = strrpos($regexp, '/');
$jsRegexp = RegexpConvertor::toJS('/' . substr($regexp, $lpos, $rpos - $lpos) . '/', true);
$config['regexp'] = new Regexp($regexp);
$config['regexp']->setJS($jsRegexp);
$config['notAfter'] = new Regexp('/' . $this->notAfter . '/');
}
// Try to find a quickMatch if none is set
if ($this->quickMatch === false)
{
$config['quickMatch'] = ConfigHelper::generateQuickMatchFromList($codes);
}
return $config;
}
/**
* {@inheritdoc}
*/
public function getJSHints()
{
return ['EMOTICONS_NOT_AFTER' => (int) !empty($this->notAfter)];
}
/**
* Generate the dynamic template that renders all emoticons
*
* @return string
*/
public function getTemplate()
{
// Build the <xsl:choose> node
$xsl = '<xsl:choose>';
// First, test whether the emoticon should be rendered as text if applicable
if (!empty($this->notIfCondition))
{
$xsl .= '<xsl:when test="' . htmlspecialchars($this->notIfCondition, ENT_COMPAT) . '">'
. '<xsl:value-of select="."/>'
. '</xsl:when>'
. '<xsl:otherwise>'
. '<xsl:choose>';
}
// Iterate over codes, create an <xsl:when> for each emote
foreach ($this->collection as $code => $template)
{
$xsl .= '<xsl:when test=".=' . htmlspecialchars(XPath::export($code), ENT_COMPAT) . '">'
. $template
. '</xsl:when>';
}
// Finish it with an <xsl:otherwise> that displays the unknown codes as text
$xsl .= '<xsl:otherwise><xsl:value-of select="."/></xsl:otherwise>';
// Close the emote switch
$xsl .= '</xsl:choose>';
// Close the "notIf" condition if applicable
if (!empty($this->notIfCondition))
{
$xsl .= '</xsl:otherwise></xsl:choose>';
}
return $xsl;
}
}