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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * This is the part of the wikitext parser which handles automatic paragraphs |
| 5 | * and conversion of start-of-line prefixes to HTML lists. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 20 | * http://www.gnu.org/copyleft/gpl.html |
| 21 | * |
| 22 | * @file |
| 23 | * @ingroup Parser |
| 24 | * @internal |
| 25 | */ |
| 26 | |
| 27 | namespace MediaWiki\Parser; |
| 28 | |
| 29 | use LogicException; |
| 30 | use StringUtils; |
| 31 | |
| 32 | class BlockLevelPass { |
| 33 | /** @var bool */ |
| 34 | private $DTopen = false; |
| 35 | /** @var bool */ |
| 36 | private $inPre = false; |
| 37 | /** @var string */ |
| 38 | private $lastParagraph = ''; |
| 39 | /** @var bool */ |
| 40 | private $lineStart; |
| 41 | /** @var string */ |
| 42 | private $text; |
| 43 | |
| 44 | # State constants for the definition list colon extraction |
| 45 | private const COLON_STATE_TEXT = 0; |
| 46 | private const COLON_STATE_TAG = 1; |
| 47 | private const COLON_STATE_TAGSTART = 2; |
| 48 | private const COLON_STATE_CLOSETAG = 3; |
| 49 | private const COLON_STATE_TAGSLASH = 4; |
| 50 | private const COLON_STATE_COMMENT = 5; |
| 51 | private const COLON_STATE_COMMENTDASH = 6; |
| 52 | private const COLON_STATE_COMMENTDASHDASH = 7; |
| 53 | private const COLON_STATE_LC = 8; |
| 54 | |
| 55 | /** |
| 56 | * Make lists from lines starting with ':', '*', '#', etc. |
| 57 | * |
| 58 | * @param string $text |
| 59 | * @param bool $lineStart Whether or not this is at the start of a line. |
| 60 | * @return string The lists rendered as HTML |
| 61 | * @internal |
| 62 | */ |
| 63 | public static function doBlockLevels( $text, $lineStart ) { |
| 64 | $pass = new self( $text, $lineStart ); |
| 65 | return $pass->execute(); |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * @param string $text |
| 70 | * @param bool $lineStart |
| 71 | */ |
| 72 | private function __construct( $text, $lineStart ) { |
| 73 | $this->text = $text; |
| 74 | $this->lineStart = $lineStart; |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * @return bool |
| 79 | */ |
| 80 | private function hasOpenParagraph() { |
| 81 | return $this->lastParagraph !== ''; |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * If a pre or p is open, return the corresponding close tag and update |
| 86 | * the state. If no tag is open, return an empty string. |
| 87 | * @param bool $atTheEnd Omit trailing newline if we've reached the end. |
| 88 | * @return string |
| 89 | */ |
| 90 | private function closeParagraph( $atTheEnd = false ) { |
| 91 | $result = ''; |
| 92 | if ( $this->hasOpenParagraph() ) { |
| 93 | $result = '</' . $this->lastParagraph . '>'; |
| 94 | if ( !$atTheEnd ) { |
| 95 | $result .= "\n"; |
| 96 | } |
| 97 | } |
| 98 | $this->inPre = false; |
| 99 | $this->lastParagraph = ''; |
| 100 | return $result; |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * getCommon() returns the length of the longest common substring |
| 105 | * of both arguments, starting at the beginning of both. |
| 106 | * |
| 107 | * @param string $st1 |
| 108 | * @param string $st2 |
| 109 | * |
| 110 | * @return int |
| 111 | */ |
| 112 | private function getCommon( $st1, $st2 ) { |
| 113 | $shorter = min( strlen( $st1 ), strlen( $st2 ) ); |
| 114 | |
| 115 | for ( $i = 0; $i < $shorter; ++$i ) { |
| 116 | if ( $st1[$i] !== $st2[$i] ) { |
| 117 | break; |
| 118 | } |
| 119 | } |
| 120 | return $i; |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Open the list item element identified by the prefix character. |
| 125 | * |
| 126 | * @param string $char |
| 127 | * |
| 128 | * @return string |
| 129 | */ |
| 130 | private function openList( $char ) { |
| 131 | $result = $this->closeParagraph(); |
| 132 | |
| 133 | if ( $char === '*' ) { |
| 134 | $result .= "<ul><li>"; |
| 135 | } elseif ( $char === '#' ) { |
| 136 | $result .= "<ol><li>"; |
| 137 | } elseif ( $char === ':' ) { |
| 138 | $result .= "<dl><dd>"; |
| 139 | } elseif ( $char === ';' ) { |
| 140 | $result .= "<dl><dt>"; |
| 141 | $this->DTopen = true; |
| 142 | } else { |
| 143 | $result = '<!-- ERR 1 -->'; |
| 144 | } |
| 145 | |
| 146 | return $result; |
| 147 | } |
| 148 | |
| 149 | /** |
| 150 | * Close the current list item and open the next one. |
| 151 | * @param string $char |
| 152 | * |
| 153 | * @return string |
| 154 | */ |
| 155 | private function nextItem( $char ) { |
| 156 | if ( $char === '*' || $char === '#' ) { |
| 157 | return "</li>\n<li>"; |
| 158 | } elseif ( $char === ':' || $char === ';' ) { |
| 159 | $close = "</dd>\n"; |
| 160 | if ( $this->DTopen ) { |
| 161 | $close = "</dt>\n"; |
| 162 | } |
| 163 | if ( $char === ';' ) { |
| 164 | $this->DTopen = true; |
| 165 | return $close . '<dt>'; |
| 166 | } else { |
| 167 | $this->DTopen = false; |
| 168 | return $close . '<dd>'; |
| 169 | } |
| 170 | } |
| 171 | return '<!-- ERR 2 -->'; |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * Close the current list item identified by the prefix character. |
| 176 | * @param string $char |
| 177 | * |
| 178 | * @return string |
| 179 | */ |
| 180 | private function closeList( $char ) { |
| 181 | if ( $char === '*' ) { |
| 182 | $text = "</li></ul>"; |
| 183 | } elseif ( $char === '#' ) { |
| 184 | $text = "</li></ol>"; |
| 185 | } elseif ( $char === ':' ) { |
| 186 | if ( $this->DTopen ) { |
| 187 | $this->DTopen = false; |
| 188 | $text = "</dt></dl>"; |
| 189 | } else { |
| 190 | $text = "</dd></dl>"; |
| 191 | } |
| 192 | } else { |
| 193 | return '<!-- ERR 3 -->'; |
| 194 | } |
| 195 | return $text; |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * Execute the pass. |
| 200 | * @return string |
| 201 | */ |
| 202 | private function execute() { |