155 lines
3.7 KiB
PHP
155 lines
3.7 KiB
PHP
<?php
|
|
/**
|
|
* @copyright Copyright 2014 Carsten Brandt, 2024 Daniel Pimley
|
|
* @license https://github.com/xenocrat/chyrp-markdown/blob/master/LICENSE
|
|
* @link https://github.com/xenocrat/chyrp-markdown#readme
|
|
*/
|
|
|
|
namespace xenocrat\markdown\block;
|
|
|
|
/**
|
|
* Adds headline blocks.
|
|
*
|
|
* Make sure to reset anchor link counter on prepare():
|
|
*
|
|
* ```php
|
|
* protected function prepare()
|
|
* {
|
|
* $this->headlineAnchorLinks = [];
|
|
* }
|
|
* ```
|
|
*/
|
|
trait HeadlineTrait
|
|
{
|
|
/**
|
|
* @var bool - Generate an `id` attribute for headline anchors.
|
|
*/
|
|
public $headlineAnchors = false;
|
|
|
|
/**
|
|
* @var int[] - Incrementing counter of rendered anchor links.
|
|
*/
|
|
protected $headlineAnchorLinks = [];
|
|
|
|
/**
|
|
* Identify a line as a headline.
|
|
*/
|
|
protected function identifyHeadline($line, $lines, $current): bool
|
|
{
|
|
return (
|
|
// ATX headline.
|
|
preg_match('/^ {0,3}(#{1,6})([ \t]|$)/', $line)
|
|
// setext headline.
|
|
|| !empty($lines[$current + 1])
|
|
&& preg_match('/^ {0,3}(\-+|=+)\s*$/', $lines[$current + 1])
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Consume lines for a headline.
|
|
*/
|
|
protected function consumeHeadline($lines, $current): array
|
|
{
|
|
if (
|
|
preg_match(
|
|
'/^ {0,3}(#{1,6})([ \t]|$)/',
|
|
$lines[$current],
|
|
$matches
|
|
)
|
|
) {
|
|
// ATX headline.
|
|
$line = ltrim($lines[$current], "# \t");
|
|
$line = preg_replace('/ +(#+ *)?$/', '', $line);
|
|
$block = [
|
|
'headline',
|
|
'content' => $this->parseInline($line),
|
|
'level' => strlen($matches[1]),
|
|
];
|
|
return [$block, $current];
|
|
} else {
|
|
// Setext headline.
|
|
$line = trim($lines[$current]);
|
|
$block = [
|
|
'headline',
|
|
'content' => $this->parseInline($line),
|
|
'level' => substr_count($lines[$current + 1], '=') ? 1 : 2,
|
|
];
|
|
return [$block, $current + 1];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Renders a headline.
|
|
*/
|
|
protected function renderHeadline($block): string
|
|
{
|
|
$tag = 'h' . $block['level'];
|
|
$id = '';
|
|
$content = $this->renderAbsy($block['content']);
|
|
|
|
if (
|
|
$this->headlineAnchors
|
|
&& class_exists('\\IntlChar')
|
|
&& function_exists('mb_str_split')
|
|
&& function_exists('mb_convert_case')
|
|
) {
|
|
$str = $this->unEscapeHtmlEntities(
|
|
strip_tags($content),
|
|
ENT_QUOTES | ENT_SUBSTITUTE
|
|
);
|
|
|
|
$exploded = mb_str_split($str, 1, 'UTF-8');
|
|
|
|
foreach ($exploded as $chr) {
|
|
$type = \IntlChar::charType($chr);
|
|
if (
|
|
$chr === ' ' || $chr === '-' || $chr === '_'
|
|
|| $type === \IntlChar::CHAR_CATEGORY_UPPERCASE_LETTER
|
|
|| $type === \IntlChar::CHAR_CATEGORY_LOWERCASE_LETTER
|
|
|| $type === \IntlChar::CHAR_CATEGORY_TITLECASE_LETTER
|
|
|| $type === \IntlChar::CHAR_CATEGORY_MODIFIER_LETTER
|
|
|| $type === \IntlChar::CHAR_CATEGORY_OTHER_LETTER
|
|
|| $type === \IntlChar::CHAR_CATEGORY_DECIMAL_DIGIT_NUMBER
|
|
|| $type === \IntlChar::CHAR_CATEGORY_LETTER_NUMBER
|
|
|| $type === \IntlChar::CHAR_CATEGORY_CONNECTOR_PUNCTUATION
|
|
|| $type === \IntlChar::CHAR_CATEGORY_NON_SPACING_MARK
|
|
|| $type === \IntlChar::CHAR_CATEGORY_ENCLOSING_MARK
|
|
|| $type === \IntlChar::CHAR_CATEGORY_COMBINING_SPACING_MARK
|
|
) {
|
|
$id .= ($chr === ' ') ?
|
|
'-' :
|
|
mb_convert_case($chr, MB_CASE_LOWER, 'UTF-8');
|
|
}
|
|
}
|
|
|
|
if ($id !== '') {
|
|
$prefix = $this->getContextId();
|
|
if ($prefix !== '') {
|
|
$prefix .= '-';
|
|
}
|
|
|
|
while (isset($this->headlineAnchorLinks[$id])) {
|
|
$id .= '-' . $this->headlineAnchorLinks[$id]++;
|
|
}
|
|
|
|
$this->headlineAnchorLinks[$id] = 1;
|
|
|
|
$id = ' id="'
|
|
. $prefix
|
|
. $this->escapeHtmlEntities(
|
|
$id,
|
|
ENT_COMPAT | ENT_SUBSTITUTE
|
|
)
|
|
. '"';
|
|
}
|
|
}
|
|
|
|
return "<{$tag}{$id}>{$content}</{$tag}>\n";
|
|
}
|
|
|
|
abstract protected function parseInline($text);
|
|
abstract protected function renderAbsy($absy);
|
|
abstract protected function escapeHtmlEntities($text, $flags = 0);
|
|
abstract protected function unEscapeHtmlEntities($text, $flags = 0);
|
|
}
|