572 lines
18 KiB
PHP
572 lines
18 KiB
PHP
<?php
|
|
|
|
namespace Markdownify;
|
|
|
|
class ConverterExtra extends Converter
|
|
{
|
|
|
|
/**
|
|
* table data, including rows with content and the maximum width of each col
|
|
*
|
|
* @var array
|
|
*/
|
|
protected $table = [];
|
|
|
|
/**
|
|
* current col
|
|
*
|
|
* @var int
|
|
*/
|
|
protected $col = -1;
|
|
|
|
/**
|
|
* current row
|
|
*
|
|
* @var int
|
|
*/
|
|
protected $row = 0;
|
|
|
|
/**
|
|
* constructor, see Markdownify::Markdownify() for more information
|
|
*/
|
|
public function __construct($linksAfterEachParagraph = self::LINK_AFTER_CONTENT, $bodyWidth = MDFY_BODYWIDTH, $keepHTML = MDFY_KEEPHTML)
|
|
{
|
|
parent::__construct($linksAfterEachParagraph, $bodyWidth, $keepHTML);
|
|
|
|
// new markdownable tags & attributes
|
|
// header ids: # foo {bar}
|
|
$this->isMarkdownable['h1']['id'] = 'optional';
|
|
$this->isMarkdownable['h1']['class'] = 'optional';
|
|
$this->isMarkdownable['h2']['id'] = 'optional';
|
|
$this->isMarkdownable['h2']['class'] = 'optional';
|
|
$this->isMarkdownable['h3']['id'] = 'optional';
|
|
$this->isMarkdownable['h3']['class'] = 'optional';
|
|
$this->isMarkdownable['h4']['id'] = 'optional';
|
|
$this->isMarkdownable['h4']['class'] = 'optional';
|
|
$this->isMarkdownable['h5']['id'] = 'optional';
|
|
$this->isMarkdownable['h5']['class'] = 'optional';
|
|
$this->isMarkdownable['h6']['id'] = 'optional';
|
|
$this->isMarkdownable['h6']['class'] = 'optional';
|
|
// tables
|
|
$this->isMarkdownable['table'] = [];
|
|
$this->isMarkdownable['th'] = [
|
|
'align' => 'optional',
|
|
];
|
|
$this->isMarkdownable['td'] = [
|
|
'align' => 'optional',
|
|
];
|
|
$this->isMarkdownable['tr'] = [];
|
|
array_push($this->ignore, 'thead');
|
|
array_push($this->ignore, 'tbody');
|
|
array_push($this->ignore, 'tfoot');
|
|
// definition lists
|
|
$this->isMarkdownable['dl'] = [];
|
|
$this->isMarkdownable['dd'] = [];
|
|
$this->isMarkdownable['dt'] = [];
|
|
// link class
|
|
$this->isMarkdownable['a']['id'] = 'optional';
|
|
$this->isMarkdownable['a']['class'] = 'optional';
|
|
// footnotes
|
|
$this->isMarkdownable['fnref'] = [
|
|
'target' => 'required',
|
|
];
|
|
$this->isMarkdownable['footnotes'] = [];
|
|
$this->isMarkdownable['fn'] = [
|
|
'name' => 'required',
|
|
];
|
|
$this->parser->blockElements['fnref'] = false;
|
|
$this->parser->blockElements['fn'] = true;
|
|
$this->parser->blockElements['footnotes'] = true;
|
|
// abbr
|
|
$this->isMarkdownable['abbr'] = [
|
|
'title' => 'required',
|
|
];
|
|
// build RegEx lookahead to decide wether table can pe parsed or not
|
|
$inlineTags = array_keys($this->parser->blockElements, false);
|
|
$colContents = '(?:[^<]|<(?:' . implode('|', $inlineTags) . '|[^a-z]))*';
|
|
$this->tableLookaheadHeader = '{
|
|
^\s*(?:<thead\s*>)?\s* # open optional thead
|
|
<tr\s*>\s*(?: # start required row with headers
|
|
<th(?:\s+align=("|\')(?:left|center|right)\1)?\s*> # header with optional align
|
|
\s*' . $colContents . '\s* # contents
|
|
</th>\s* # close header
|
|
)+</tr> # close row with headers
|
|
\s*(?:</thead>)? # close optional thead
|
|
}sxi';
|
|
$this->tdSubstitute = '\s*' . $colContents . '\s* # contents
|
|
</td>\s*';
|
|
$this->tableLookaheadBody = '{
|
|
\s*(?:<tbody\s*>)?\s* # open optional tbody
|
|
(?:<tr\s*>\s* # start row
|
|
%s # cols to be substituted
|
|
</tr>)+ # close row
|
|
\s*(?:</tbody>)? # close optional tbody
|
|
\s*</table> # close table
|
|
}sxi';
|
|
}
|
|
|
|
/**
|
|
* handle header tags (<h1> - <h6>)
|
|
*
|
|
* @param int $level 1-6
|
|
* @return void
|
|
*/
|
|
protected function handleHeader($level)
|
|
{
|
|
if ($this->parser->isStartTag) {
|
|
$this->parser->tagAttributes['cssSelector'] = $this->getCurrentCssSelector();
|
|
$this->stack();
|
|
} else {
|
|
$tag = $this->unstack();
|
|
if (!empty($tag['cssSelector'])) {
|
|
// {#id.class}
|
|
$this->out(' {' . $tag['cssSelector'] . '}');
|
|
}
|
|
}
|
|
parent::handleHeader($level);
|
|
}
|
|
|
|
/**
|
|
* handle <a> tags parsing
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
protected function handleTag_a_parser()
|
|
{
|
|
parent::handleTag_a_parser();
|
|
$this->parser->tagAttributes['cssSelector'] = $this->getCurrentCssSelector();
|
|
}
|
|
|
|
/**
|
|
* handle <a> tags conversion
|
|
*
|
|
* @param array $tag
|
|
* @param string $buffer
|
|
* @return string The markdownified link
|
|
*/
|
|
protected function handleTag_a_converter($tag, $buffer)
|
|
{
|
|
$output = parent::handleTag_a_converter($tag, $buffer);
|
|
if (!empty($tag['cssSelector'])) {
|
|
// [This link][id]{#id.class}
|
|
$output .= '{' . $tag['cssSelector'] . '}';
|
|
}
|
|
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* handle <abbr> tags
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
protected function handleTag_abbr()
|
|
{
|
|
if ($this->parser->isStartTag) {
|
|
$this->stack();
|
|
$this->buffer();
|
|
} else {
|
|
$tag = $this->unstack();
|
|
$tag['text'] = $this->unbuffer();
|
|
$add = true;
|
|
foreach ($this->stack['abbr'] as $stacked) {
|
|
if ($stacked['text'] == $tag['text']) {
|
|
/** TODO: differing abbr definitions, i.e. different titles for same text **/
|
|
$add = false;
|
|
break;
|
|
}
|
|
}
|
|
$this->out($tag['text']);
|
|
if ($add) {
|
|
array_push($this->stack['abbr'], $tag);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* flush stacked abbr tags
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
protected function flushStacked_abbr()
|
|
{
|
|
$out = [];
|
|
foreach ($this->stack['abbr'] as $k => $tag) {
|
|
if (!isset($tag['unstacked'])) {
|
|
array_push($out, ' *[' . $tag['text'] . ']: ' . $tag['title']);
|
|
$tag['unstacked'] = true;
|
|
$this->stack['abbr'][$k] = $tag;
|
|
}
|
|
}
|
|
if (!empty($out)) {
|
|
$this->out("\n\n" . implode("\n", $out));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* handle <table> tags
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
protected function handleTag_table()
|
|
{
|
|
if ($this->parser->isStartTag) {
|
|
// check if upcoming table can be converted
|
|
if ($this->keepHTML) {
|
|
if (preg_match($this->tableLookaheadHeader, $this->parser->html, $matches)) {
|
|
// header seems good, now check body
|
|
// get align & number of cols
|
|
preg_match_all('#<th(?:\s+align=("|\')(left|right|center)\1)?\s*>#si', $matches[0], $cols);
|
|
$regEx = '';
|
|
$i = 1;
|
|
$aligns = [];
|
|
foreach ($cols[2] as $align) {
|
|
$align = strtolower($align);
|
|
array_push($aligns, $align);
|
|
if (empty($align)) {
|
|
$align = 'left'; // default value
|
|
}
|
|
$td = '\s+align=("|\')' . $align . '\\' . $i;
|
|
$i++;
|
|
if ($align == 'left') {
|
|
// look for empty align or left
|
|
$td = '(?:' . $td . ')?';
|
|
}
|
|
$td = '<td' . $td . '\s*>';
|
|
$regEx .= $td . $this->tdSubstitute;
|
|
}
|
|
$regEx = sprintf($this->tableLookaheadBody, $regEx);
|
|
if (preg_match($regEx, $this->parser->html, $matches, null, strlen($matches[0]))) {
|
|
// this is a markdownable table tag!
|
|
$this->table = [
|
|
'rows' => [],
|
|
'col_widths' => [],
|
|
'aligns' => $aligns,
|
|
];
|
|
$this->row = 0;
|
|
} else {
|
|
// non markdownable table
|
|
$this->handleTagToText();
|
|
}
|
|
} else {
|
|
// non markdownable table
|
|
$this->handleTagToText();
|
|
}
|
|
} else {
|
|
$this->table = [
|
|
'rows' => [],
|
|
'col_widths' => [],
|
|
'aligns' => [],
|
|
];
|
|
$this->row = 0;
|
|
}
|
|
} else {
|
|
// finally build the table in Markdown Extra syntax
|
|
$separator = [];
|
|
if (!isset($this->table['aligns'])) {
|
|
$this->table['aligns'] = [];
|
|
}
|
|
// seperator with correct align identifiers
|
|
foreach ($this->table['aligns'] as $col => $align) {
|
|
if (!$this->keepHTML && !isset($this->table['col_widths'][$col])) {
|
|
break;
|
|
}
|
|
$left = ' ';
|
|
$right = ' ';
|
|
switch ($align) {
|
|
case 'left':
|
|
$left = ':';
|
|
break;
|
|
case 'center':
|
|
$right = ':';
|
|
$left = ':';
|
|
case 'right':
|
|
$right = ':';
|
|
break;
|
|
}
|
|
array_push($separator, $left . str_repeat('-', $this->table['col_widths'][$col]) . $right);
|
|
}
|
|
$separator = '|' . implode('|', $separator) . '|';
|
|
|
|
$rows = [];
|
|
// add padding
|
|
array_walk_recursive($this->table['rows'], [&$this, 'alignTdContent']);
|
|
$header = array_shift($this->table['rows']);
|
|
array_push($rows, '| ' . implode(' | ', $header) . ' |');
|
|
array_push($rows, $separator);
|
|
foreach ($this->table['rows'] as $row) {
|
|
array_push($rows, '| ' . implode(' | ', $row) . ' |');
|
|
}
|
|
$this->out(implode("\n" . $this->indent, $rows));
|
|
$this->table = [];
|
|
$this->setLineBreaks(2);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* properly pad content so it is aligned as whished
|
|
* should be used with array_walk_recursive on $this->table['rows']
|
|
*
|
|
* @param string &$content
|
|
* @param int $col
|
|
* @return void
|
|
*/
|
|
protected function alignTdContent(&$content, $col)
|
|
{
|
|
if (!isset($this->table['aligns'][$col])) {
|
|
$this->table['aligns'][$col] = 'left';
|
|
}
|
|
switch ($this->table['aligns'][$col]) {
|
|
default:
|
|
case 'left':
|
|
$content .= str_repeat(' ', $this->table['col_widths'][$col] - $this->strlen($content));
|
|
break;
|
|
case 'right':
|
|
$content = str_repeat(' ', $this->table['col_widths'][$col] - $this->strlen($content)) . $content;
|
|
break;
|
|
case 'center':
|
|
$paddingNeeded = $this->table['col_widths'][$col] - $this->strlen($content);
|
|
$left = floor($paddingNeeded / 2);
|
|
$right = $paddingNeeded - $left;
|
|
$content = str_repeat(' ', $left) . $content . str_repeat(' ', $right);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* handle <tr> tags
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
protected function handleTag_tr()
|
|
{
|
|
if ($this->parser->isStartTag) {
|
|
$this->col = -1;
|
|
} else {
|
|
$this->row++;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* handle <td> tags
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
protected function handleTag_td()
|
|
{
|
|
if ($this->parser->isStartTag) {
|
|
$this->col++;
|
|
if (!isset($this->table['col_widths'][$this->col])) {
|
|
$this->table['col_widths'][$this->col] = 0;
|
|
}
|
|
$this->buffer();
|
|
} else {
|
|
$buffer = trim($this->unbuffer());
|
|
if (!isset($this->table['col_widths'][$this->col])) {
|
|
$this->table['col_widths'][$this->col] = 0;
|
|
}
|
|
$this->table['col_widths'][$this->col] = max($this->table['col_widths'][$this->col], $this->strlen($buffer));
|
|
$this->table['rows'][$this->row][$this->col] = $buffer;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* handle <th> tags
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
protected function handleTag_th()
|
|
{
|
|
if (!$this->keepHTML && !isset($this->table['rows'][1]) && !isset($this->table['aligns'][$this->col + 1])) {
|
|
if (isset($this->parser->tagAttributes['align'])) {
|
|
$this->table['aligns'][$this->col + 1] = $this->parser->tagAttributes['align'];
|
|
} else {
|
|
$this->table['aligns'][$this->col + 1] = '';
|
|
}
|
|
}
|
|
$this->handleTag_td();
|
|
}
|
|
|
|
/**
|
|
* handle <dl> tags
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
protected function handleTag_dl()
|
|
{
|
|
if (!$this->parser->isStartTag) {
|
|
$this->setLineBreaks(2);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* handle <dt> tags
|
|
*
|
|
* @param void
|
|
* @return void
|
|
**/
|
|
protected function handleTag_dt()
|
|
{
|
|
if (!$this->parser->isStartTag) {
|
|
$this->setLineBreaks(1);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* handle <dd> tags
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
protected function handleTag_dd()
|
|
{
|
|
if ($this->parser->isStartTag) {
|
|
if (substr(ltrim($this->parser->html), 0, 3) == '<p>') {
|
|
// next comes a paragraph, so we'll need an extra line
|
|
$this->out("\n" . $this->indent);
|
|
} elseif (substr($this->output, -2) == "\n\n") {
|
|
$this->output = substr($this->output, 0, -1);
|
|
}
|
|
$this->out(': ');
|
|
$this->indent(' ', false);
|
|
} else {
|
|
// lookahead for next dt
|
|
if (substr(ltrim($this->parser->html), 0, 4) == '<dt>') {
|
|
$this->setLineBreaks(2);
|
|
} else {
|
|
$this->setLineBreaks(1);
|
|
}
|
|
$this->indent(' ');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* handle <fnref /> tags (custom footnote references, see markdownify_extra::parseString())
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
protected function handleTag_fnref()
|
|
{
|
|
$this->out('[^' . $this->parser->tagAttributes['target'] . ']');
|
|
}
|
|
|
|
/**
|
|
* handle <fn> tags (custom footnotes, see markdownify_extra::parseString()
|
|
* and markdownify_extra::_makeFootnotes())
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
protected function handleTag_fn()
|
|
{
|
|
if ($this->parser->isStartTag) {
|
|
$this->out('[^' . $this->parser->tagAttributes['name'] . ']:');
|
|
$this->setLineBreaks(1);
|
|
} else {
|
|
$this->setLineBreaks(2);
|
|
}
|
|
$this->indent(' ');
|
|
}
|
|
|
|
/**
|
|
* handle <footnotes> tag (custom footnotes, see markdownify_extra::parseString()
|
|
* and markdownify_extra::_makeFootnotes())
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
protected function handleTag_footnotes()
|
|
{
|
|
if (!$this->parser->isStartTag) {
|
|
$this->setLineBreaks(2);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* parse a HTML string, clean up footnotes prior
|
|
*
|
|
* @param string $HTML input
|
|
* @return string Markdown formatted output
|
|
*/
|
|
public function parseString($html)
|
|
{
|
|
/** TODO: custom markdown-extra options, e.g. titles & classes **/
|
|
// <sup id="fnref:..."><a href"#fn..." rel="footnote">...</a></sup>
|
|
// => <fnref target="..." />
|
|
$html = preg_replace('@<sup id="fnref:([^"]+)">\s*<a href="#fn:\1" rel="footnote">\s*\d+\s*</a>\s*</sup>@Us', '<fnref target="$1" />', $html);
|
|
// <div class="footnotes">
|
|
// <hr />
|
|
// <ol>
|
|
//
|
|
// <li id="fn:...">...</li>
|
|
// ...
|
|
//
|
|
// </ol>
|
|
// </div>
|
|
// =>
|
|
// <footnotes>
|
|
// <fn name="...">...</fn>
|
|
// ...
|
|
// </footnotes>
|
|
$html = preg_replace_callback('#<div class="footnotes">\s*<hr />\s*<ol>\s*(.+)\s*</ol>\s*</div>#Us', [&$this, '_makeFootnotes'], $html);
|
|
|
|
return parent::parseString($html);
|
|
}
|
|
|
|
/**
|
|
* replace HTML representation of footnotes with something more easily parsable
|
|
*
|
|
* @note this is a callback to be used in parseString()
|
|
*
|
|
* @param array $matches
|
|
* @return string
|
|
*/
|
|
protected function _makeFootnotes($matches)
|
|
{
|
|
// <li id="fn:1">
|
|
// ...
|
|
// <a href="#fnref:block" rev="footnote">↩</a></p>
|
|
// </li>
|
|
// => <fn name="1">...</fn>
|
|
// remove footnote link
|
|
$fns = preg_replace('@\s*( \s*)?<a href="#fnref:[^"]+" rev="footnote"[^>]*>↩</a>\s*@s', '', $matches[1]);
|
|
// remove empty paragraph
|
|
$fns = preg_replace('@<p>\s*</p>@s', '', $fns);
|
|
// <li id="fn:1">...</li> -> <footnote nr="1">...</footnote>
|
|
$fns = str_replace('<li id="fn:', '<fn name="', $fns);
|
|
|
|
$fns = '<footnotes>' . $fns . '</footnotes>';
|
|
|
|
return preg_replace('#</li>\s*(?=(?:<fn|</footnotes>))#s', '</fn>$1', $fns);
|
|
}
|
|
|
|
/**
|
|
* handle <a> tags parsing
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
protected function getCurrentCssSelector()
|
|
{
|
|
$cssSelector = '';
|
|
if (isset($this->parser->tagAttributes['id'])) {
|
|
$cssSelector .= '#' . $this->decode($this->parser->tagAttributes['id']);
|
|
}
|
|
if (isset($this->parser->tagAttributes['class'])) {
|
|
$classes = explode(' ', $this->decode($this->parser->tagAttributes['class']));
|
|
$classes = array_filter($classes);
|
|
$cssSelector .= '.' . join('.', $classes);
|
|
}
|
|
return $cssSelector;
|
|
}
|
|
}
|