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<?php
/* Copyright (c) 2019 Geert Bergman (geert@scrivo.nl), highlight.php
*
* 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 HighlightUtilities;
require_once __DIR__ . '/_internals.php';
require_once __DIR__ . '/_themeColors.php';
/**
* Get a list of available stylesheets.
*
* By default, a list of filenames without the `.css` extension will be returned.
* This can be configured with the `$filePaths` argument.
*
* @api
*
* @since 9.15.8.1
*
* @param bool $filePaths Return absolute paths to stylesheets instead
*
* @return string[]
*/
function getAvailableStyleSheets($filePaths = false)
{
$results = array();
$folder = getStyleSheetFolder();
$dh = @dir($folder);
if ($dh) {
while (($entry = $dh->read()) !== false) {
if (substr($entry, -4, 4) !== ".css") {
continue;
}
if ($filePaths) {
$results[] = implode(DIRECTORY_SEPARATOR, array($folder, $entry));
} else {
$results[] = basename($entry, ".css");
}
}
$dh->close();
}
return $results;
}
/**
* Get the RGB representation used for the background of a given theme as an
* array of three numbers.
*
* @api
*
* @since 9.18.1.1
*
* @param string $name The stylesheet name (with or without the extension)
*
* @throws \DomainException when no stylesheet with this name exists
*
* @return float[] An array representing RGB numerical values
*/
function getThemeBackgroundColor($name)
{
return _getThemeBackgroundColor(_getNoCssExtension($name));
}
/**
* Get the contents of the given stylesheet.
*
* @api
*
* @since 9.15.8.1
*
* @param string $name The stylesheet name (with or without the extension)
*
* @throws \DomainException when the no stylesheet with this name exists
*
* @return false|string The CSS content of the stylesheet or FALSE when
* the stylesheet content could be read
*/
function getStyleSheet($name)
{
$path = getStyleSheetPath($name);
return file_get_contents($path);
}
/**
* Get the absolute path to the folder containing the stylesheets distributed in this package.
*
* @api
*
* @since 9.15.8.1
*
* @return string An absolute path to the folder
*/
function getStyleSheetFolder()
{
$paths = array(__DIR__, '..', 'styles');
return implode(DIRECTORY_SEPARATOR, $paths);
}
/**
* Get the absolute path to a given stylesheet distributed in this package.
*
* @api
*
* @since 9.15.8.1
*
* @param string $name The stylesheet name (with or without the extension)
*
* @throws \DomainException when the no stylesheet with this name exists
*
* @return string The absolute path to the stylesheet with the given name
*/
function getStyleSheetPath($name)
{
$name = _getNoCssExtension($name);
$path = implode(DIRECTORY_SEPARATOR, array(getStyleSheetFolder(), $name)) . ".css";
if (!file_exists($path)) {
throw new \DomainException("There is no stylesheet with by the name of '$name'.");
}
return $path;
}
/**
* Convert the HTML generated by Highlighter and split it up into an array of lines.
*
* @api
*
* @since 9.15.6.1
*
* @param string $html An HTML string generated by `Highlighter::highlight()`
*
* @throws \RuntimeException when the DOM extension is not available
* @throws \UnexpectedValueException when the given HTML could not be parsed
*
* @return string[]|false An array of lines of code as strings. False if an error occurred in splitting up by lines
*/
function splitCodeIntoArray($html)
{
if (!extension_loaded("dom")) {
throw new \RuntimeException("The DOM extension is not loaded but is required.");
}
if (trim($html) === "") {
return array();
}
$dom = new \DOMDocument();
// https://stackoverflow.com/a/8218649
if (!$dom->loadHTML(mb_convert_encoding($html, "HTML-ENTITIES", "UTF-8"))) {
throw new \UnexpectedValueException("The given HTML could not be parsed correctly.");
}
$xpath = new \DOMXPath($dom);
$spans = $xpath->query("//span[contains(text(), '\n') or contains(text(), '\r\n')]");
/** @var \DOMElement $span */
foreach ($spans as $span) {
$closingTags = '';
$openingTags = '';
$curr = $span;
while ($curr->tagName === 'span') {
$closingTags .= '</span>';
$openingTags = sprintf('<span class="%s">%s', $curr->getAttribute("class"), $openingTags);
$curr = $curr->parentNode;
}
$renderedSpan = $dom->saveHTML($span);
$finished = preg_replace(
'/\R/u',
$closingTags . PHP_EOL . $openingTags,
$renderedSpan
);
$html = str_replace($renderedSpan, $finished, $html);
}
return preg_split('/\R/u', $html);
}