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| 1 | <?php |
| 2 | /** |
| 3 | * Copyright (c) 2023 Johannes Stegmüller |
| 4 | * |
| 5 | * This file is a port of mhchemParser originally authored by Martin Hensel in javascript/typescript. |
| 6 | * The original license for this software can be found in the accompanying LICENSE.mhchemParser-ts.txt file. |
| 7 | */ |
| 8 | |
| 9 | namespace MediaWiki\Extension\Math\WikiTexVC\Mhchem; |
| 10 | |
| 11 | use MediaWiki\Extension\Math\WikiTexVC\MHChem\MhchemUtil as MU; |
| 12 | use RuntimeException; |
| 13 | |
| 14 | /** |
| 15 | * Takes MhchemParser output and convert it to TeX |
| 16 | * |
| 17 | * Functionality is the same as mhchemTexify class at ~line 1505 in mhchemParser.js |
| 18 | * in mhchemParser by Martin Hensel. |
| 19 | * |
| 20 | * @author Johannes Stegmüller |
| 21 | * @license GPL-2.0-or-later |
| 22 | */ |
| 23 | class MhchemTexify { |
| 24 | |
| 25 | /** @var bool optimize the output TeX for WikiTexVC */ |
| 26 | private bool $optimizeForTexVC; |
| 27 | |
| 28 | /** |
| 29 | * Takes MhchemParser output and convert it to TeX |
| 30 | * @param bool $optimizeForTexVC optimizes the output for WikiTexVC grammar by |
| 31 | * wrapping dimensions for some TeX commands in curly brackets. |
| 32 | */ |
| 33 | public function __construct( bool $optimizeForTexVC = false ) { |
| 34 | $this->optimizeForTexVC = $optimizeForTexVC; |
| 35 | } |
| 36 | |
| 37 | public function go( $input, $addOuterBraces ): string { |
| 38 | if ( !MhchemUtil::issetJS( $input ) ) { |
| 39 | return ""; |
| 40 | } |
| 41 | $res = ""; |
| 42 | $cee = false; |
| 43 | for ( $i = 0; $i < count( $input ); $i++ ) { |
| 44 | $inputI = $input[$i]; |
| 45 | |
| 46 | if ( is_string( $inputI ) ) { |
| 47 | $res .= $inputI; |
| 48 | } else { |
| 49 | $res .= self::go2( $inputI ); |
| 50 | if ( $inputI["type_"] === '1st-level escape' ) { |
| 51 | $cee = true; |
| 52 | } |
| 53 | } |
| 54 | } |
| 55 | if ( $addOuterBraces && !$cee && $res ) { |
| 56 | $res = "{" . $res . "}"; |
| 57 | } |
| 58 | return $res; |
| 59 | } |
| 60 | |
| 61 | private function goInner( $input ): string { |
| 62 | return self::go( $input, false ); |
| 63 | } |
| 64 | |
| 65 | private function strReplaceFirst( $search, $replace, $subject ): string { |
| 66 | return implode( $replace, explode( $search, $subject, 2 ) ); |
| 67 | } |
| 68 | |
| 69 | private function go2( $buf ): string { |
| 70 | switch ( $buf["type_"] ) { |
| 71 | case 'chemfive': |
| 72 | $res = ""; |
| 73 | $b5 = [ |
| 74 | "a" => self::goInner( $buf["a"] ), |
| 75 | "b" => self::goInner( $buf["b"] ), |
| 76 | "p" => self::goInner( $buf["p"] ), |
| 77 | "o" => self::goInner( $buf["o"] ), |
| 78 | "q" => self::goInner( $buf["q"] ), |
| 79 | "d" => self::goInner( $buf["d"] ) |
| 80 | ]; |
| 81 | if ( MU::issetJS( $b5["a"] ) ) { |
| 82 | if ( preg_match( "/^[+\-]/", $b5["a"] ) ) { |
| 83 | $b5["a"] = "{" . $b5["a"] . "}"; |
| 84 | } |
| 85 | $res .= $b5["a"] . "\\,"; |
| 86 | } |
| 87 | if ( MU::issetJS( $b5["b"] ) || MU::issetJS( $b5["p"] ) ) { |
| 88 | $res .= "{\\vphantom{A}}"; |
| 89 | $res .= "^{\\hphantom{" . ( $b5["b"] ) . "}}_{\\hphantom{" . ( $b5["p"] ) . "}}"; |
| 90 | $res .= !$this->optimizeForTexVC ? "\\mkern-1.5mu" : "\\mkern{-1.5mu}"; |
| 91 | $res .= "{\\vphantom{A}}"; |
| 92 | $res .= "^{\\smash[t]{\\vphantom{2}}\\llap{" . ( $b5["b"] ) . "}}"; |
| 93 | $res .= "_{\\vphantom{2}\\llap{\\smash[t]{" . ( $b5["p"] ) . "}}}"; |
| 94 | } |
| 95 | |
| 96 | if ( MU::issetJS( $b5["o"] ) ) { |
| 97 | if ( preg_match( "/^[+\-]/", $b5["o"] ) ) { |
| 98 | $b5["o"] = "{" . $b5["o"] . "}"; |
| 99 | } |
| 100 | $res .= $b5["o"]; |
| 101 | } |
| 102 | if ( isset( $buf["dType"] ) && $buf["dType"] === 'kv' ) { |
| 103 | if ( MU::issetJS( $b5["d"] ) || MU::issetJS( $b5["q"] ) ) { |
| 104 | $res .= "{\\vphantom{A}}"; |
| 105 | } |
| 106 | if ( MU::issetJS( $b5["d"] ) ) { |
| 107 | $res .= "^{" . $b5["d"] . "}"; |
| 108 | } |
| 109 | if ( MU::issetJS( $b5["q"] ) ) { |
| 110 | $res .= "_{\\smash[t]{" . $b5["q"] . "}}"; |
| 111 | } |
| 112 | } elseif ( MU::issetJS( $buf["dType"] ?? null ) && $buf["dType"] === 'oxidation' ) { |
| 113 | if ( MU::issetJS( $b5["d"] ) ) { |
| 114 | $res .= "{\\vphantom{A}}"; |
| 115 | $res .= "^{" . $b5["d"] . "}"; |
| 116 | } |
| 117 | if ( MU::issetJS( $b5["q"] ) ) { |
| 118 | $res .= "{\\vphantom{A}}"; |
| 119 | $res .= "_{\\smash[t]{" . $b5["q"] . "}}"; |
| 120 | } |
| 121 | } else { |
| 122 | if ( MU::issetJS( $b5["q"] ) ) { |
| 123 | $res .= "{\\vphantom{A}}"; |
| 124 | $res .= "_{\\smash[t]{" . $b5["q"] . "}}"; |
| 125 | } |
| 126 | if ( MU::issetJS( $b5["d"] ) ) { |
| 127 | $res .= "{\\vphantom{A}}"; |
| 128 | $res .= "^{" . $b5["d"] . "}"; |
| 129 | } |
| 130 | } |
| 131 | break; |
| 132 | case 'roman numeral': |
| 133 | case 'rm': |
| 134 | $res = "\\mathrm{" . $buf["p1"] . "}"; |
| 135 | break; |
| 136 | case 'text': |
| 137 | if ( preg_match( "/[\^_]/", $buf["p1"] ) ) { |
| 138 | $buf["p1"] = self::strReplaceFirst( "-", "\\text{-}", |
| 139 | self::strReplaceFirst( " ", "~", $buf["p1"] ) ); |
| 140 | $res = "\\mathrm{" . $buf["p1"] . "}"; |
| 141 | } else { |
| 142 | $res = "\\text{" . $buf["p1"] . "}"; |
| 143 | } |
| 144 | break; |
| 145 | case 'state of aggregation': |
| 146 | $res = ( !$this->optimizeForTexVC ? "\\mskip2mu " : "\\mskip{2mu} " ) . self::goInner( $buf["p1"] ); |
| 147 | break; |
| 148 | case 'state of aggregation subscript': |
| 149 | $res = ( !$this->optimizeForTexVC ? "\\mskip1mu " : "\\mskip{1mu} " ) . self::goInner( $buf["p1"] ); |
| 150 | break; |
| 151 | case 'bond': |
| 152 | $res = self::getBond( $buf["kind_"] ); |
| 153 | if ( !$res ) { |
| 154 | throw new RuntimeException( "MhchemErrorBond: mhchem Error. Unknown bond type (" |
| 155 | . $buf["kind_"] . ")" ); |
| 156 | } |
| 157 | break; |
| 158 | case 'frac': |
| 159 | $c = "\\frac{" . $buf["p1"] . "}{" . $buf["p2"] . "}"; |
| 160 | $res = "\\mathchoice{\\textstyle" . $c . "}{" . $c . "}{" . $c . "}{" . $c . "}"; |
| 161 | break; |
| 162 | case 'pu-frac': |
| 163 | $d = "\\frac{" . self::goInner( $buf["p1"] ) . "}{" . self::goInner( $buf["p2"] ) . "}"; |
| 164 | $res = "\\mathchoice{\\textstyle" . $d . "}{" . $d . "}{" . $d . "}{" . $d . "}"; |
| 165 | break; |
| 166 | case '1st-level escape': |
| 167 | case 'tex-math': |
| 168 | $res = $buf["p1"] . " "; |
| 169 | break; |
| 170 | case 'frac-ce': |
| 171 | $res = "\\frac{" . self::goInner( $buf["p1"] ) . "}{" . self::goInner( $buf["p2"] ) . "}"; |
| 172 | break; |
| 173 | case 'overset': |
| 174 | $res = "\\overset{" . self::goInner( $buf["p1"] ) . "}{" . self::goInner( $buf["p2"] ) . "}"; |
| 175 | break; |
| 176 | case 'underset': |
| 177 | $res = "\\underset{" . self::goInner( $buf["p1"] ) . "}{" . self::goInner( $buf["p2"] ) . "}"; |
| 178 | break; |
| 179 | case 'underbrace': |
| 180 | $res = "\\underbrace{" . self::goInner( $buf["p1"] ) . "}_{" . self::goInner( $buf["p2"] ) . "}"; |
| 181 | break; |
| 182 | case 'color': |
| 183 | $res = "{\\color{" . $buf["color1"] . "}{" . self::goInner( $buf["color2"] ) . "}}"; |
| 184 | break; |
| 185 | case 'color0': |
| 186 | $res = "\\color{" . $buf["color"] . "}"; |
| 187 | break; |
| 188 | case 'arrow': |
| 189 | $b6 = [ |
| 190 | "rd" => self::goInner( $buf["rd"] ), |
| 191 | "rq" => self::goInner( $buf["rq"] ) |
| 192 | ]; |
| 193 | $arrow = self::getArrow( $buf["r"] ); |
| 194 | if ( MU::issetJS( $b6["rd"] ) || MU::issetJS( $b6["rq"] ) ) { |
| 195 | if ( $buf["r"] === "<=>" || $buf["r"] === "<=>>" || $buf["r"] === "<<=>" || $buf["r"] === "<-->" ) { |
| 196 | $arrow = "\\long" . $arrow; |
| 197 | if ( MU::issetJS( $b6["rd"] ) ) { |
| 198 | $arrow = "\\overset{" . $b6["rd"] . "}{" . $arrow . "}"; |
| 199 | } |
| 200 | if ( MU::issetJS( $b6["rq"] ) ) { |
| 201 | if ( $buf["r"] === "<-->" ) { |
| 202 | $arrow = !$this->optimizeForTexVC ? |
| 203 | "\\underset{\\lower2mu{" . $b6["rq"] . "}}{" . $arrow . "}" |
| 204 | : "\\underset{\\lower{2mu}{" . $b6["rq"] . "}}{" . $arrow . "}"; |
| 205 | } else { |
| 206 | $arrow = !$this->optimizeForTexVC ? |
| 207 | "\\underset{\\lower6mu{" . $b6["rq"] . "}}{" . $arrow . "}" |
| 208 | : "\\underset{\\lower{6mu}{" . $b6["rq"] . "}}{" . $arrow . "}"; |
| 209 | } |
| 210 | } |
| 211 | $arrow = " {}\\mathrel{" . $arrow . "}{} "; |
| 212 | } else { |
| 213 | if ( MU::issetJS( $b6["rq"] ) ) { |
| 214 | $arrow .= "[{" . $b6["rq"] . "}]"; |
| 215 | } |
| 216 | $arrow .= "{" . $b6["rd"] . "}"; |
| 217 | $arrow = " {}\\mathrel{\\x" . $arrow . "}{} "; |
| 218 | } |
| 219 | } else { |
| 220 | $arrow = " {}\\mathrel{\\long" . $arrow . "}{} "; |
| 221 | } |
| 222 | $res = $arrow; |
| 223 | break; |
| 224 | case 'operator': |
| 225 | $res = self::getOperator( $buf["kind_"] ); |
| 226 | break; |
| 227 | default: |
| 228 | $res = null; |
| 229 | } |
| 230 | if ( isset( $res ) ) { |
| 231 | return $res; |
| 232 | } |
| 233 | |
| 234 | switch ( $buf["type_"] ) { |
| 235 | case 'space': |
| 236 | $res = " "; |
| 237 | break; |
| 238 | case 'tinySkip': |
| 239 | $res = !$this->optimizeForTexVC ? '\\mkern2mu' : '\\mkern{2mu}'; |
| 240 | break; |
| 241 | case 'pu-space-1': |
| 242 | case 'entitySkip': |
| 243 | $res = "~"; |
| 244 | break; |
| 245 | case 'pu-space-2': |
| 246 | $res = !$this->optimizeForTexVC ? "\\mkern3mu " : "\\mkern{3mu} "; |
| 247 | break; |
| 248 | case '1000 separator': |
| 249 | $res = !$this->optimizeForTexVC ? "\\mkern2mu " : "\\mkern{2mu} "; |
| 250 | break; |
| 251 | case 'commaDecimal': |
| 252 | $res = "{,}"; |
| 253 | break; |
| 254 | case 'comma enumeration L': |
| 255 | $res = "{" . $buf["p1"] . "}" . ( !$this->optimizeForTexVC ? "\\mkern6mu " : "\\mkern{6mu} " ); |
| 256 | break; |
| 257 | case 'comma enumeration M': |
| 258 | $res = "{" . $buf["p1"] . "}" . ( !$this->optimizeForTexVC ? "\\mkern3mu " : "\\mkern{3mu} " ); |
| 259 | break; |
| 260 | case 'comma enumeration S': |
| 261 | $res = "{" . $buf["p1"] . "}" . ( !$this->optimizeForTexVC ? "\\mkern1mu " : "\\mkern{1mu} " ); |
| 262 | break; |
| 263 | case 'hyphen': |
| 264 | $res = "\\text{-}"; |
| 265 | break; |
| 266 | case 'addition compound': |
| 267 | $res = "\\,{\\cdot}\\,"; |
| 268 | break; |
| 269 | case 'electron dot': |
| 270 | $res = !$this->optimizeForTexVC ? |
| 271 | "\\mkern1mu \\bullet\\mkern1mu " : "\\mkern{1mu} \\bullet\\mkern{1mu} "; |
| 272 | break; |
| 273 | case 'KV x': |
| 274 | $res = "{\\times}"; |
| 275 | break; |
| 276 | case 'prime': |
| 277 | $res = "\\prime "; |
| 278 | break; |
| 279 | case 'cdot': |
| 280 | $res = "\\cdot "; |
| 281 | break; |
| 282 | case 'tight cdot': |
| 283 | $res = !$this->optimizeForTexVC ? "\\mkern1mu{\\cdot}\\mkern1mu " : "\\mkern{1mu}{\\cdot}\\mkern{1mu} "; |
| 284 | break; |
| 285 | case 'times': |
| 286 | $res = "\\times "; |
| 287 | break; |
| 288 | case 'circa': |
| 289 | $res = "{\\sim}"; |
| 290 | break; |
| 291 | case '^': |
| 292 | $res = "uparrow"; |
| 293 | break; |
| 294 | case 'v': |
| 295 | $res = "downarrow"; |
| 296 | break; |
| 297 | case 'ellipsis': |
| 298 | $res = "\\ldots "; |
| 299 | break; |
| 300 | case '/': |
| 301 | $res = "/"; |
| 302 | break; |
| 303 | case ' / ': |
| 304 | $res = "\\,/\\,"; |
| 305 | break; |
| 306 | default: |
| 307 | throw new RuntimeException( "MhchemBugT: mhchem bug T. Please report." ); |
| 308 | } |
| 309 | return $res; |
| 310 | } |
| 311 | |
| 312 | private function getArrow( $a ): string { |
| 313 | switch ( $a ) { |
| 314 | case "\u2192": |
| 315 | case "\u27F6": |
| 316 | case "->": |
| 317 | return "rightarrow"; |
| 318 | case "<-": |
| 319 | return "leftarrow"; |
| 320 | case "<->": |
| 321 | return "leftrightarrow"; |
| 322 | case "<-->": |
| 323 | return "leftrightarrows"; |
| 324 | case "\u21CC": |
| 325 | case "<=>": |
| 326 | return "rightleftharpoons"; |
| 327 | case "<=>>": |
| 328 | return "Rightleftharpoons"; |
| 329 | case "<<=>": |
| 330 | return "Leftrightharpoons"; |
| 331 | default: |
| 332 | throw new RuntimeException( "MhchemBugT: mhchem bug T. Please report." ); |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | private function getBond( $a ): string { |
| 337 | switch ( $a ) { |
| 338 | case "1": |
| 339 | case "-": |
| 340 | return "{-}"; |
| 341 | case "2": |
| 342 | case "=": |
| 343 | return "{=}"; |
| 344 | case "3": |
| 345 | case "#": |
| 346 | return "{\\equiv}"; |
| 347 | case "~": |
| 348 | return "{\\tripledash}"; |
| 349 | case "~-": |
| 350 | return !$this->optimizeForTexVC ? "{\\rlap{\\lower.1em{-}}\\raise.1em{\\tripledash}}" |
| 351 | : "{\\rlap{\\lower{.1em}{-}}\\raise{.1em}{\\tripledash}}"; |
| 352 | case "~--": |
| 353 | case "~=": |
| 354 | return !$this->optimizeForTexVC ? "{\\rlap{\\lower.2em{-}}\\rlap{\\raise.2em{\\tripledash}}-}" |
| 355 | : "{\\rlap{\\lower{.2em}{-}}\\rlap{\\raise{.2em}{\\tripledash}}-}"; |
| 356 | case "-~-": |
| 357 | return !$this->optimizeForTexVC ? "{\\rlap{\\lower.2em{-}}\\rlap{\\raise.2em{-}}\\tripledash}" |
| 358 | : "{\\rlap{\\lower{.2em}{-}}\\rlap{\\raise{.2em}{-}}\\tripledash}"; |
| 359 | case "...": |
| 360 | return "{{\\cdot}{\\cdot}{\\cdot}}"; |
| 361 | case "....": |
| 362 | return "{{\\cdot}{\\cdot}{\\cdot}{\\cdot}}"; |
| 363 | case "->": |
| 364 | return "{\\rightarrow}"; |
| 365 | case "<-": |
| 366 | return "{\\leftarrow}"; |
| 367 | case "<": |
| 368 | return "{<}"; |
| 369 | case ">": |
| 370 | return "{>}"; |
| 371 | default: |
| 372 | throw new RuntimeException( "MhchemBugT: mhchem bug T. Please report." ); |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | private function getOperator( $a ): string { |
| 377 | switch ( $a ) { |
| 378 | case "+": |
| 379 | return " {}+{} "; |
| 380 | case "-": |
| 381 | return " {}-{} "; |
| 382 | case "=": |
| 383 | return " {}={} "; |
| 384 | case "<": |
| 385 | return " {}<{} "; |
| 386 | case ">": |
| 387 | return " {}>{} "; |
| 388 | case "<<": |
| 389 | return " {}\\ll{} "; |
| 390 | case ">>": |
| 391 | return " {}\\gg{} "; |
| 392 | case "\\pm": |
| 393 | return " {}\\pm{} "; |
| 394 | case "$\\approx$": |
| 395 | case "\\approx": |
| 396 | return " {}\\approx{} "; |
| 397 | case "(v)": |
| 398 | case "v": |
| 399 | return " \\downarrow{} "; |
| 400 | case "(^)": |
| 401 | case "^": |
| 402 | return " \\uparrow{} "; |
| 403 | default: |
| 404 | throw new RuntimeException( "MhchemBugT: mhchem bug T. Please report." ); |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | } |