1 | <?php |
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13 | trait EmphStrongTrait |
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14 | { |
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15 | /** |
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16 | * Parses empathized and strong elements. |
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17 | * @marker _ |
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18 | * @marker * |
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19 | */ |
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20 | 33 | protected function parseEmphStrong($text) |
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21 | { |
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22 | 33 | $marker = $text[0]; |
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23 | |||
24 | 33 | if (!isset($text[1])) { |
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25 | 3 | return [['text', $text[0]], 1]; |
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26 | } |
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27 | |||
28 | 33 | if ($marker == $text[1]) { // strong |
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29 | // work around a PHP bug that crashes with a segfault on too much regex backtrack |
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30 | // check whether the end marker exists in the text |
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31 | // https://github.com/erusev/parsedown/issues/443 |
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32 | // https://bugs.php.net/bug.php?id=45735 |
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33 | 27 | if (strpos($text, $marker . $marker, 2) === false) { |
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34 | 6 | return [['text', $text[0] . $text[1]], 2]; |
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35 | } |
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36 | |||
37 | 21 | if ($marker == '*' && preg_match('/^[*]{2}((?:[^*]|[*][^*]*[*])+?)[*]{2}(?![*]{2})/s', $text, $matches) || |
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38 | 21 | $marker == '_' && preg_match('/^__((?:[^_]|_[^_]*_)+?)__(?!__)/us', $text, $matches)) { |
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39 | |||
40 | return [ |
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41 | [ |
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42 | 21 | 'strong', |
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43 | 21 | $this->parseInline($matches[1]), |
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44 | ], |
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45 | 21 | strlen($matches[0]) |
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46 | ]; |
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47 | } |
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48 | } else { // emph |
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49 | // work around a PHP bug that crashes with a segfault on too much regex backtrack |
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50 | // check whether the end marker exists in the text |
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51 | // https://github.com/erusev/parsedown/issues/443 |
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52 | // https://bugs.php.net/bug.php?id=45735 |
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53 | 21 | if (strpos($text, $marker, 1) === false) { |
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54 | 10 | return [['text', $text[0]], 1]; |
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55 | } |
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56 | |||
57 | 16 | if ($marker == '*' && preg_match('/^[*]((?:[^*]|[*][*][^*]+?[*][*])+?)[*](?![*][^*])/s', $text, $matches) || |
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58 | 16 | $marker == '_' && preg_match('/^_((?:[^_]|__[^_]*__)+?)_(?!_[^_])\b/us', $text, $matches)) { |
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59 | return [ |
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60 | [ |
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61 | 15 | 'emph', |
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62 | 15 | $this->parseInline($matches[1]), |
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63 | ], |
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64 | 15 | strlen($matches[0]) |
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65 | ]; |
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66 | } |
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67 | } |
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68 | 5 | return [['text', $text[0]], 1]; |
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69 | } |
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70 | |||
71 | 21 | protected function renderStrong($block) |
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75 | |||
76 | 15 | protected function renderEmph($block) |
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80 | } |
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81 |