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<?php
/* Copyright (c)
* - 2006-2013, Ivan Sagalaev (maniacsoftwaremaniacs.org), highlight.js
* (original author)
* - 2013-2019, Geert Bergman (geertscrivo.nl), highlight.php
* - 2014 Daniel Lynge, highlight.php (contributor)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of "highlight.js", "highlight.php", nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
namespace Highlight;
/**
* @todo In highlight.php 10.x, replace the @final attribute with the `final` keyword.
*
* @final
*
* @internal
*
* // Backward compatibility properties
*
* @property Mode $mode (DEPRECATED) All properties traditionally inside of $mode are now available directly from this class.
* @property bool $caseInsensitive (DEPRECATED) Due to compatibility requirements with highlight.js, use `case_insensitive` instead.
*/
class Language extends Mode
{
/** @var string[] */
private static $COMMON_KEYWORDS = array('of', 'and', 'for', 'in', 'not', 'or', 'if', 'then');
/** @var string */
public $name;
/** @var Mode|null */
private $mode = null;
/**
* @param string $lang
* @param string $filePath
*
* @throws \InvalidArgumentException when the given $filePath is inaccessible
*/
public function __construct($lang, $filePath)
{
$this->name = $lang;
// We're loading the JSON definition file as an \stdClass object instead of an associative array. This is being
// done to take advantage of objects being pass by reference automatically in PHP whereas arrays are pass by
// value.
$json = file_get_contents($filePath);
if ($json === false) {
throw new \InvalidArgumentException("Language file inaccessible: $filePath");
}
$this->mode = json_decode($json);
}
/**
* @param string $name
*
* @return bool|Mode|null
*/
public function __get($name)
{
if ($name === 'mode') {
@trigger_error('The "mode" property will be removed in highlight.php 10.x', E_USER_DEPRECATED);
return $this->mode;
}
if ($name === 'caseInsensitive') {
@trigger_error('Due to compatibility requirements with highlight.js, use "case_insensitive" instead.', E_USER_DEPRECATED);
if (isset($this->mode->case_insensitive)) {
return $this->mode->case_insensitive;
}
return false;
}
if (isset($this->mode->{$name})) {
return $this->mode->{$name};
}
return null;
}
/**
* @param string $value
* @param bool $global
*
* @return RegEx
*/
private function langRe($value, $global = false)
{
return RegExUtils::langRe($value, $global, $this->case_insensitive);
}
/**
* Performs a shallow merge of multiple objects into one.
*
* @param Mode $params the objects to merge
* @param array<string, mixed> ...$_
*
* @return Mode
*/
private function inherit($params, $_ = array())
{
/** @var Mode $result */
$result = new \stdClass();
$objects = func_get_args();
$parent = array_shift($objects);
foreach ($parent as $key => $value) {
$result->{$key} = $value;
}
foreach ($objects as $object) {
foreach ($object as $key => $value) {
$result->{$key} = $value;
}
}
return $result;
}
/**
* @param Mode|null $mode
*
* @return bool
*/
private function dependencyOnParent($mode)
{
if (!$mode) {
return false;
}
if (isset($mode->endsWithParent) && $mode->endsWithParent) {
return $mode->endsWithParent;
}
return $this->dependencyOnParent(isset($mode->starts) ? $mode->starts : null);
}
/**
* @param Mode $mode
*
* @return array<int, \stdClass|Mode>
*/
private function expandOrCloneMode($mode)
{
if ($mode->variants && !$mode->cachedVariants) {
$mode->cachedVariants = array();
foreach ($mode->variants as $variant) {
$mode->cachedVariants[] = $this->inherit($mode, array('variants' => null), $variant);
}
}
// EXPAND
// if we have variants then essentially "replace" the mode with the variants
// this happens in compileMode, where this function is called from
if ($mode->cachedVariants) {
return $mode->cachedVariants;
}
// CLONE
// if we have dependencies on parents then we need a unique
// instance of ourselves, so we can be reused with many
// different parents without issue
if ($this->dependencyOnParent($mode)) {
return array($this->inherit($mode, array(
'starts' => $mode->starts ? $this->inherit($mode->starts) : null,
)));
}
// highlight.php does not have a concept freezing our Modes
// no special dependency issues, just return ourselves
return array($mode);
}
/**
* @param Mode $mode
* @param Mode|null $parent
*
* @return void
*/
private function compileMode($mode, $parent = null)
{
Mode::_normalize($mode);
if ($mode->compiled) {
return;
}
$mode->compiled = true;
$mode->keywords = $mode->keywords ? $mode->keywords : $mode->beginKeywords;
if ($mode->keywords) {
$mode->keywords = $this->compileKeywords($mode->keywords, (bool) $this->case_insensitive);
}
$mode->lexemesRe = $this->langRe($mode->lexemes ? $mode->lexemes : "\w+", true);
if ($parent) {
if ($mode->beginKeywords) {
$mode->begin = "\\b(" . implode("|", explode(" ", $mode->beginKeywords)) . ")\\b";
}
if (!$mode->begin) {
$mode->begin = "\B|\b";
}
$mode->beginRe = $this->langRe($mode->begin);
if ($mode->endSameAsBegin) {
$mode->end = $mode->begin;
}
if (!$mode->end && !$mode->endsWithParent) {
$mode->end = "\B|\b";
}
if ($mode->end) {
$mode->endRe = $this->langRe($mode->end);
}
$mode->terminator_end = $mode->end;
if ($mode->endsWithParent && $parent->terminator_end) {
$mode->terminator_end .= ($mode->end ? "|" : "") . $parent->terminator_end;
}
}
if ($mode->illegal) {
$mode->illegalRe = $this->langRe($mode->illegal);
}
if ($mode->relevance === null) {
$mode->relevance = 1;
}
if (!$mode->contains) {
$mode->contains = array();
}
/** @var Mode[] $expandedContains */
$expandedContains = array();
foreach ($mode->contains as &$c) {
if ($c instanceof \stdClass) {
Mode::_normalize($c);
}
$expandedContains = array_merge($expandedContains, $this->expandOrCloneMode(
$c === 'self' ? $mode : $c
));
}
$mode->contains = $expandedContains;
/** @var Mode $contain */
foreach ($mode->contains as $contain) {
$this->compileMode($contain, $mode);
}
if ($mode->starts) {
$this->compileMode($mode->starts, $parent);
}
$terminators = new Terminators($this->case_insensitive);
$mode->terminators = $terminators->_buildModeRegex($mode);
Mode::_handleDeprecations($mode);
}
/**
* @param array<string, string>|string $rawKeywords
* @param bool $caseSensitive
*
* @return array<string, array<int, string|int>>
*/
private function compileKeywords($rawKeywords, $caseSensitive)
{
/** @var array<string, array<int, string|int>> $compiledKeywords */
$compiledKeywords = array();
if (is_string($rawKeywords)) {
$this->splitAndCompile("keyword", $rawKeywords, $compiledKeywords, $caseSensitive);
} else {
foreach ($rawKeywords as $className => $rawKeyword) {
$this->splitAndCompile($className, $rawKeyword, $compiledKeywords, $caseSensitive);
}
}
return $compiledKeywords;
}
/**
* @param string $className
* @param string $str
* @param array<string, array<int, string|int>> $compiledKeywords
* @param bool $caseSensitive
*
* @return void
*/
private function splitAndCompile($className, $str, array &$compiledKeywords, $caseSensitive)
{
if ($caseSensitive) {
$str = strtolower($str);
}
$keywords = explode(' ', $str);
foreach ($keywords as $keyword) {
$pair = explode('|', $keyword);
$providedScore = isset($pair[1]) ? $pair[1] : null;
$compiledKeywords[$pair[0]] = array($className, $this->scoreForKeyword($pair[0], $providedScore));
}
}
/**
* @param string $keyword
* @param string $providedScore
*
* @return int
*/
private function scoreForKeyword($keyword, $providedScore)
{
if ($providedScore) {
return (int) $providedScore;
}
return $this->commonKeyword($keyword) ? 0 : 1;
}
/**
* @param string $word
*
* @return bool
*/
private function commonKeyword($word)
{
return in_array(strtolower($word), self::$COMMON_KEYWORDS);
}
/**
* Compile the Language definition.
*
* @param bool $safeMode
*
* @since 9.17.1.0 The 'safeMode' parameter was added.
*
* @return void
*/
public function compile($safeMode)
{
if ($this->compiled) {
return;
}
$jr = new JsonRef();
$jr->decodeRef($this->mode);
// self is not valid at the top-level
if (isset($this->mode->contains) && !in_array("self", $this->mode->contains)) {
if (!$safeMode) {
throw new \LogicException("`self` is not supported at the top-level of a language.");
}
$this->mode->contains = array_filter($this->mode->contains, function ($mode) {
return $mode !== "self";
});
}
$this->compileMode($this->mode);
}
/**
* @todo Remove in highlight.php 10.x
*
* @deprecated 9.16.0 This method should never have been exposed publicly as part of the API.
*
* @param \stdClass|null $e
*
* @return void
*/
public function complete(&$e)
{
Mode::_normalize($e);
}
}