/usr/share/php/texy/src/Texy/Texy.php is in php-texy 2.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* This file is part of the Texy! (http://texy.info)
* Copyright (c) 2004 David Grudl (http://davidgrudl.com)
*/
/**
* Texy! - Convert plain text to XHTML format using {@link process()}.
*
* <code>
* $texy = new Texy();
* $html = $texy->process($text);
* </code>
*
* @author David Grudl
*/
class Texy extends TexyObject
{
// configuration directives
const ALL = TRUE;
const NONE = FALSE;
// Texy version
const VERSION = '2.6';
const REVISION = 'released on 2014-06-20';
// types of protection marks
const CONTENT_MARKUP = "\x17";
const CONTENT_REPLACED = "\x16";
const CONTENT_TEXTUAL = "\x15";
const CONTENT_BLOCK = "\x14";
// url filters
const FILTER_ANCHOR = 'anchor';
const FILTER_IMAGE = 'image';
// HTML minor-modes
const XML = 2;
// HTML modes
const HTML4_TRANSITIONAL = 0;
const HTML4_STRICT = 1;
const HTML5 = 4;
const XHTML1_TRANSITIONAL = 2; // Texy::HTML4_TRANSITIONAL | Texy::XML;
const XHTML1_STRICT = 3; // Texy::HTML4_STRICT | Texy::XML;
const XHTML5 = 6; // Texy::HTML5 | Texy::XML;
/** @var string input & output text encoding */
public $encoding = 'utf-8';
/** @var array Texy! syntax configuration */
public $allowed = array();
/** @var TRUE|FALSE|array Allowed HTML tags */
public $allowedTags;
/** @var TRUE|FALSE|array Allowed classes */
public $allowedClasses = Texy::ALL; // all classes and id are allowed
/** @var TRUE|FALSE|array Allowed inline CSS style */
public $allowedStyles = Texy::ALL; // all inline styles are allowed
/** @var int TAB width (for converting tabs to spaces) */
public $tabWidth = 8;
/** @var boolean Do obfuscate e-mail addresses? */
public $obfuscateEmail = TRUE;
/** @var array regexps to check URL schemes */
public $urlSchemeFilters = NULL; // disable URL scheme filter
/** @var bool Paragraph merging mode */
public $mergeLines = TRUE;
/** @var array Parsing summary */
public $summary = array(
'images' => array(),
'links' => array(),
'preload' => array(),
);
/** @var string Generated stylesheet */
public $styleSheet = '';
/** @var array CSS classes for align modifiers */
public $alignClasses = array(
'left' => NULL,
'right' => NULL,
'center' => NULL,
'justify' => NULL,
'top' => NULL,
'middle' => NULL,
'bottom' => NULL,
);
/** @var bool remove soft hyphens (SHY)? */
public $removeSoftHyphens = TRUE;
/** @deprecated */
public static $advertisingNotice = FALSE;
/** @var string */
public $nontextParagraph = 'div';
/** @var TexyScriptModule */
public $scriptModule;
/** @var TexyParagraphModule */
public $paragraphModule;
/** @var TexyHtmlModule */
public $htmlModule;
/** @var TexyImageModule */
public $imageModule;
/** @var TexyLinkModule */
public $linkModule;
/** @var TexyPhraseModule */
public $phraseModule;
/** @var TexyEmoticonModule */
public $emoticonModule;
/** @var TexyBlockModule */
public $blockModule;
/** @var TexyHeadingModule */
public $headingModule;
/** @var TexyHorizLineModule */
public $horizLineModule;
/** @var TexyBlockQuoteModule */
public $blockQuoteModule;
/** @var TexyListModule */
public $listModule;
/** @var TexyTableModule */
public $tableModule;
/** @var TexyFigureModule */
public $figureModule;
/** @var TexyTypographyModule */
public $typographyModule;
/** @var TexyLongWordsModule */
public $longWordsModule;
/** @var TexyHtmlOutputModule */
public $htmlOutputModule;
/**
* Registered regexps and associated handlers for inline parsing.
* @var array of ('handler' => callback, 'pattern' => regular expression)
*/
private $linePatterns = array();
private $_linePatterns;
/**
* Registered regexps and associated handlers for block parsing.
* @var array of ('handler' => callback, 'pattern' => regular expression)
*/
private $blockPatterns = array();
private $_blockPatterns;
/** @var array */
private $postHandlers = array();
/** @var TexyHtml DOM structure for parsed text */
private $DOM;
/** @var array Texy protect markup table */
private $marks = array();
/** @var array for internal usage */
public $_classes, $_styles;
/** @var bool */
private $processing;
/** @var array of events and registered handlers */
private $handlers = array();
/**
* DTD descriptor.
* $dtd[element][0] - allowed attributes (as array keys)
* $dtd[element][1] - allowed content for an element (content model) (as array keys)
* - array of allowed elements (as keys)
* - FALSE - empty element
* - 0 - special case for ins & del
* @var array
*/
public $dtd;
/** @var array */
private static $dtdCache;
/** @var int HTML mode */
private $mode;
/** DEPRECATED */
public static $strictDTD;
public $cleaner;
public $xhtml;
public function __construct()
{
// load all modules
$this->loadModules();
// DEPRECATED
if (self::$strictDTD !== NULL) {
$this->setOutputMode(self::$strictDTD ? self::XHTML1_STRICT : self::XHTML1_TRANSITIONAL);
} else {
$this->setOutputMode(self::XHTML1_TRANSITIONAL);
}
// DEPRECATED
$this->cleaner = & $this->htmlOutputModule;
// examples of link references ;-)
$link = new TexyLink('http://texy.info/');
$link->modifier->title = 'The best text -> HTML converter and formatter';
$link->label = 'Texy!';
$this->linkModule->addReference('texy', $link);
$link = new TexyLink('http://www.google.com/search?q=%s');
$this->linkModule->addReference('google', $link);
$link = new TexyLink('http://en.wikipedia.org/wiki/Special:Search?search=%s');
$this->linkModule->addReference('wikipedia', $link);
}
/**
* Set HTML/XHTML output mode (overwrites self::$allowedTags)
* @param int
* @return void
*/
public function setOutputMode($mode)
{
if (!in_array($mode, array(self::HTML4_TRANSITIONAL, self::HTML4_STRICT,
self::HTML5, self::XHTML1_TRANSITIONAL, self::XHTML1_STRICT, self::XHTML5), TRUE)
) {
throw new InvalidArgumentException("Invalid mode.");
}
if (!isset(self::$dtdCache[$mode])) {
require dirname(__FILE__) . '/DTD.php';
self::$dtdCache[$mode] = $dtd;
}
$this->mode = $mode;
$this->dtd = self::$dtdCache[$mode];
TexyHtml::$xhtml = (bool) ($mode & self::XML); // TODO: remove?
// accept all valid HTML tags and attributes by default
$this->allowedTags = array();
foreach ($this->dtd as $tag => $dtd) {
$this->allowedTags[$tag] = self::ALL;
}
}
/**
* Get HTML/XHTML output mode
* @return int
*/
public function getOutputMode()
{
return $this->mode;
}
/**
* Create array of all used modules ($this->modules).
* This array can be changed by overriding this method (by subclasses)
*/
protected function loadModules()
{
// line parsing
$this->scriptModule = new TexyScriptModule($this);
$this->htmlModule = new TexyHtmlModule($this);
$this->imageModule = new TexyImageModule($this);
$this->phraseModule = new TexyPhraseModule($this);
$this->linkModule = new TexyLinkModule($this);
$this->emoticonModule = new TexyEmoticonModule($this);
// block parsing
$this->paragraphModule = new TexyParagraphModule($this);
$this->blockModule = new TexyBlockModule($this);
$this->figureModule = new TexyFigureModule($this);
$this->horizLineModule = new TexyHorizLineModule($this);
$this->blockQuoteModule = new TexyBlockQuoteModule($this);
$this->tableModule = new TexyTableModule($this);
$this->headingModule = new TexyHeadingModule($this);
$this->listModule = new TexyListModule($this);
// post process
$this->typographyModule = new TexyTypographyModule($this);
$this->longWordsModule = new TexyLongWordsModule($this);
$this->htmlOutputModule = new TexyHtmlOutputModule($this);
}
final public function registerLinePattern($handler, $pattern, $name, $againTest = NULL)
{
if (!is_callable($handler)) {
$able = is_callable($handler, TRUE, $textual);
throw new InvalidArgumentException("Handler '$textual' is not " . ($able ? 'callable.' : 'valid PHP callback.'));
}
if (!isset($this->allowed[$name])) {
$this->allowed[$name] = TRUE;
}
$this->linePatterns[$name] = array(
'handler' => $handler,
'pattern' => $pattern,
'again' => $againTest,
);
}
final public function registerBlockPattern($handler, $pattern, $name)
{
if (!is_callable($handler)) {
$able = is_callable($handler, TRUE, $textual);
throw new InvalidArgumentException("Handler '$textual' is not " . ($able ? 'callable.' : 'valid PHP callback.'));
}
// if (!preg_match('#(.)\^.*\$\\1[a-z]*#is', $pattern)) die("Texy: Not a block pattern $name");
if (!isset($this->allowed[$name])) {
$this->allowed[$name] = TRUE;
}
$this->blockPatterns[$name] = array(
'handler' => $handler,
'pattern' => $pattern . 'm', // force multiline
);
}
final public function registerPostLine($handler, $name)
{
if (!is_callable($handler)) {
$able = is_callable($handler, TRUE, $textual);
throw new InvalidArgumentException("Handler '$textual' is not " . ($able ? 'callable.' : 'valid PHP callback.'));
}
if (!isset($this->allowed[$name])) {
$this->allowed[$name] = TRUE;
}
$this->postHandlers[$name] = $handler;
}
/**
* Converts document in Texy! to (X)HTML code.
*
* @param string input text
* @param bool is single line?
* @return string output HTML code
*/
public function process($text, $singleLine = FALSE)
{
if ($this->processing) {
throw new RuntimeException('Processing is in progress yet.');
}
// initialization
$this->marks = array();
$this->processing = TRUE;
// speed-up
if (is_array($this->allowedClasses)) {
$this->_classes = array_flip($this->allowedClasses);
} else {
$this->_classes = $this->allowedClasses;
}
if (is_array($this->allowedStyles)) {
$this->_styles = array_flip($this->allowedStyles);
} else {
$this->_styles = $this->allowedStyles;
}
// convert to UTF-8 (and check source encoding)
$text = TexyUtf::toUtf($text, $this->encoding);
if ($this->removeSoftHyphens) {
$text = str_replace("\xC2\xAD", '', $text);
}
// standardize line endings and spaces
$text = self::normalize($text);
// replace tabs with spaces
$this->tabWidth = max(1, (int) $this->tabWidth);
while (strpos($text, "\t") !== FALSE) {
$text = TexyRegexp::replace($text, '#^([^\t\n]*+)\t#mU', array($this, 'tabCb'));
}
// user before handler
$this->invokeHandlers('beforeParse', array($this, & $text, $singleLine));
// select patterns
$this->_linePatterns = $this->linePatterns;
$this->_blockPatterns = $this->blockPatterns;
foreach ($this->_linePatterns as $name => $foo) {
if (empty($this->allowed[$name])) {
unset($this->_linePatterns[$name]);
}
}
foreach ($this->_blockPatterns as $name => $foo) {
if (empty($this->allowed[$name])) {
unset($this->_blockPatterns[$name]);
}
}
// parse Texy! document into internal DOM structure
$this->DOM = TexyHtml::el();
if ($singleLine) {
$this->DOM->parseLine($this, $text);
} else {
$this->DOM->parseBlock($this, $text);
}
// user after handler
$this->invokeHandlers('afterParse', array($this, $this->DOM, $singleLine));
// converts internal DOM structure to final HTML code
$html = $this->DOM->toHtml($this);
// created by TexyParagraphModule and then protected
$html = str_replace("\r", "\n", $html);
$this->processing = FALSE;
return TexyUtf::utf2html($html, $this->encoding);
}
/**
* Converts single line in Texy! to (X)HTML code.
*
* @param string input text
* @return string output HTML code
*/
public function processLine($text)
{
return $this->process($text, TRUE);
}
/**
* Makes only typographic corrections.
* @param string input text (in encoding defined by Texy::$encoding)
* @return string output text (in UTF-8)
*/
public function processTypo($text)
{
// convert to UTF-8 (and check source encoding)
$text = TexyUtf::toUtf($text, $this->encoding);
// standardize line endings and spaces
$text = self::normalize($text);
$this->typographyModule->beforeParse($this, $text);
$text = $this->typographyModule->postLine($text, TRUE);
if (!empty($this->allowed['longwords'])) {
$text = $this->longWordsModule->postLine($text);
}
return TexyUtf::utf2html($text, $this->encoding);
}
/**
* Converts DOM structure to pure text.
* @return string
*/
public function toText()
{
if (!$this->DOM) {
throw new RuntimeException('Call $texy->process() first.');
}
return TexyUtf::utfTo($this->DOM->toText($this), $this->encoding);
}
/**
* Converts internal string representation to final HTML code in UTF-8.
* @return string
*/
final public function stringToHtml($s)
{
// decode HTML entities to UTF-8
$s = self::unescapeHtml($s);
// line-postprocessing
$blocks = explode(self::CONTENT_BLOCK, $s);
foreach ($this->postHandlers as $name => $handler) {
if (empty($this->allowed[$name])) {
continue;
}
foreach ($blocks as $n => $s) {
if ($n % 2 === 0 && $s !== '') {
$blocks[$n] = call_user_func($handler, $s);
}
}
}
$s = implode(self::CONTENT_BLOCK, $blocks);
// encode < > &
$s = self::escapeHtml($s);
// replace protected marks
$s = $this->unProtect($s);
// wellform and reformat HTML
$this->invokeHandlers('postProcess', array($this, & $s));
// unfreeze spaces
$s = self::unfreezeSpaces($s);
return $s;
}
/**
* Converts internal string representation to final HTML code in UTF-8.
* @return string
*/
final public function stringToText($s)
{
$save = $this->htmlOutputModule->lineWrap;
$this->htmlOutputModule->lineWrap = FALSE;
$s = $this->stringToHtml( $s );
$this->htmlOutputModule->lineWrap = $save;
// remove tags
$s = TexyRegexp::replace($s, '#<(script|style)(.*)</\\1>#Uis', '');
$s = strip_tags($s);
$s = TexyRegexp::replace($s, '#\n\s*\n\s*\n[\n\s]*\n#', "\n\n");
// entities -> chars
$s = self::unescapeHtml($s);
// convert nbsp to normal space and remove shy
$s = strtr($s, array(
"\xC2\xAD" => '', // shy
"\xC2\xA0" => ' ', // nbsp
));
return $s;
}
/**
* Add new event handler.
*
* @param string event name
* @param callback
* @return void
*/
final public function addHandler($event, $callback)
{
if (!is_callable($callback)) {
$able = is_callable($callback, TRUE, $textual);
throw new InvalidArgumentException("Handler '$textual' is not " . ($able ? 'callable.' : 'valid PHP callback.'));
}
$this->handlers[$event][] = $callback;
}
/**
* Invoke registered around-handlers.
*
* @param string event name
* @param TexyParser actual parser object
* @param array arguments passed into handler
* @return mixed
*/
final public function invokeAroundHandlers($event, $parser, $args)
{
if (!isset($this->handlers[$event])) {
return FALSE;
}
$invocation = new TexyHandlerInvocation($this->handlers[$event], $parser, $args);
$res = $invocation->proceed();
$invocation->free();
return $res;
}
/**
* Invoke registered after-handlers.
*
* @param string event name
* @param array arguments passed into handler
* @return void
*/
final public function invokeHandlers($event, $args)
{
if (!isset($this->handlers[$event])) {
return;
}
foreach ($this->handlers[$event] as $handler) {
call_user_func_array($handler, $args);
}
}
/**
* Translate all white spaces (\t \n \r space) to meta-spaces \x01-\x04.
* which are ignored by TexyHtmlOutputModule routine
* @param string
* @return string
*/
final public static function freezeSpaces($s)
{
return strtr($s, " \t\r\n", "\x01\x02\x03\x04");
}
/**
* Reverts meta-spaces back to normal spaces.
* @param string
* @return string
*/
final public static function unfreezeSpaces($s)
{
return strtr($s, "\x01\x02\x03\x04", " \t\r\n");
}
/**
* Removes special controls characters and normalizes line endings and spaces.
* @param string
* @return string
*/
final public static function normalize($s)
{
// standardize line endings to unix-like
$s = str_replace("\r\n", "\n", $s); // DOS
$s = strtr($s, "\r", "\n"); // Mac
// remove special chars; leave \t + \n
$s = TexyRegexp::replace($s, '#[\x00-\x08\x0B-\x1F]+#', '');
// right trim
$s = TexyRegexp::replace($s, "#[\t ]+$#m", '');
// trailing spaces
$s = trim($s, "\n");
return $s;
}
/**
* Converts to web safe characters [a-z0-9-] text.
* @param string
* @param string
* @return string
*/
final public static function webalize($s, $charlist = NULL)
{
$s = TexyUtf::utf2ascii($s);
$s = strtolower($s);
$s = TexyRegexp::replace($s, '#[^a-z0-9'.preg_quote($charlist, '#').']+#', '-');
$s = trim($s, '-');
return $s;
}
/**
* Texy! version of htmlSpecialChars (much faster than htmlSpecialChars!).
* note: " is not encoded!
* @param string
* @return string
*/
final public static function escapeHtml($s)
{
return str_replace(array('&', '<', '>'), array('&', '<', '>'), $s);
}
/**
* Texy! version of html_entity_decode (always UTF-8, much faster than original!).
* @param string
* @return string
*/
final public static function unescapeHtml($s)
{
if (strpos($s, '&') === FALSE) {
return $s;
}
return html_entity_decode($s, ENT_QUOTES, 'UTF-8');
}
/**
* Outdents text block.
* @param string
* @return string
*/
final public static function outdent($s)
{
$s = trim($s, "\n");
$min = strlen($s);
foreach (TexyRegexp::match($s, '#^ *\S#m', TexyRegexp::ALL) as $m) {
$min = min($min, strlen($m[0]) - 1);
}
if ($min) {
$s = TexyRegexp::replace($s, "#^ {{$min}}#m", '');
}
return $s;
}
/**
* Generate unique mark - useful for freezing (folding) some substrings.
* @param string any string to froze
* @param int Texy::CONTENT_* constant
* @return string internal mark
*/
final public function protect($child, $contentType)
{
if ($child === '') {
return '';
}
$key = $contentType
. strtr(base_convert(count($this->marks), 10, 8), '01234567', "\x18\x19\x1A\x1B\x1C\x1D\x1E\x1F")
. $contentType;
$this->marks[$key] = $child;
return $key;
}
final public function unProtect($html)
{
return strtr($html, $this->marks);
}
/**
* Filters bad URLs.
* @param string user URL
* @param string type: a-anchor, i-image, c-cite
* @return bool
*/
final public function checkURL($URL, $type)
{
// absolute URL with scheme? check scheme!
return empty($this->urlSchemeFilters[$type])
|| !preg_match('#[a-z][a-z0-9+.-]{0,20}:#A', $URL) // http: | mailto:
|| preg_match($this->urlSchemeFilters[$type], $URL);
}
/**
* Is given URL relative?
* @param string URL
* @return bool
*/
final public static function isRelative($URL)
{
// check for scheme, or absolute path, or absolute URL
return !preg_match('#[a-z][a-z0-9+.-]{0,20}:|[\#/?]#A', $URL);
}
/**
* Prepends root to URL, if possible.
* @param string URL
* @param string root
* @return string
*/
final public static function prependRoot($URL, $root)
{
if ($root == NULL || !self::isRelative($URL)) {
return $URL;
}
return rtrim($root, '/\\') . '/' . $URL;
}
final public function getLinePatterns()
{
return $this->_linePatterns;
}
final public function getBlockPatterns()
{
return $this->_blockPatterns;
}
final public function getDOM()
{
return $this->DOM;
}
/** @internal */
public function tabCb($m)
{
return $m[1] . str_repeat(' ', $this->tabWidth - strlen($m[1]) % $this->tabWidth);
}
/**
* PHP garbage collector helper.
*/
final public function free()
{
if (version_compare(PHP_VERSION , '5.3', '<')) {
foreach (array_keys(get_object_vars($this)) as $key) {
$this->$key = NULL;
}
}
}
final public function __clone()
{
throw new Exception('Clone is not supported.');
}
}
/**
* For Texy 1 backward compatibility.
*/
define('TEXY_ALL', Texy::ALL);
define('TEXY_NONE', Texy::NONE);
define('TEXY_CONTENT_MARKUP', Texy::CONTENT_MARKUP);
define('TEXY_CONTENT_REPLACED', Texy::CONTENT_REPLACED);
define('TEXY_CONTENT_TEXTUAL', Texy::CONTENT_TEXTUAL);
define('TEXY_CONTENT_BLOCK', Texy::CONTENT_BLOCK);
define('TEXY_VERSION', Texy::VERSION);
/**
* For Texy 2.2 compatibility
*/
define('TEXY_CHAR', TexyPatterns::CHAR);
define('TEXY_MARK', TexyPatterns::MARK);
define('TEXY_MODIFIER', TexyPatterns::MODIFIER);
define('TEXY_MODIFIER_H', TexyPatterns::MODIFIER_H);
define('TEXY_MODIFIER_HV', TexyPatterns::MODIFIER_HV);
define('TEXY_IMAGE', TexyPatterns::IMAGE);
define('TEXY_LINK_URL', TexyPatterns::LINK_URL);
define('TEXY_LINK', '(?::('.TEXY_LINK_URL.'))');
define('TEXY_LINK_N', '(?::('.TEXY_LINK_URL.'|:))');
define('TEXY_EMAIL', '['.TEXY_CHAR.'][0-9.+_'.TEXY_CHAR.'-]{0,63}@[0-9.+_'.TEXY_CHAR.'\x{ad}-]{1,252}\.['.TEXY_CHAR.'\x{ad}]{2,19}');
define('TEXY_URLSCHEME', '[a-z][a-z0-9+.-]{0,20}:');
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