maintenance/language/generateCollationData.php

   1 <?php
   2 /**
   3  * Maintenance script to generate first letter data files for Collation.php.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup MaintenanceLanguage
  22  */
  23
  24 require_once __DIR__ . '/../Maintenance.php';
  25
  26 /**
  27  * Generate first letter data files for Collation.php
  28  *
  29  * @ingroup MaintenanceLanguage
  30  */
  31 class GenerateCollationData extends Maintenance {
  32         /** The directory with source data files in it */
  33         public $dataDir;
  34
  35         /** The primary weights, indexed by codepoint */
  36         public $weights;
  37
  38         /**
  39          * A hashtable keyed by codepoint, where presence indicates that a character
  40          * has a decomposition mapping. This makes it non-preferred for group header
  41          * selection.
  42          */
  43         public $mappedChars;
  44
  45         public $debugOutFile;
  46
  47         /**
  48          * Important tertiary weights from UTS #10 section 7.2
  49          */
  50         const NORMAL_UPPERCASE = 0x08;
  51         const NORMAL_HIRAGANA = 0X0E;
  52
  53         public function __construct() {
  54                 parent::__construct();
  55                 $this->addOption( 'data-dir', 'A directory on the local filesystem ' .
  56                         'containing allkeys.txt and ucd.all.grouped.xml from unicode.org',
  57                         false, true );
  58                 $this->addOption( 'debug-output', 'Filename for sending debug output to',
  59                         false, true );
  60         }
  61
  62         public function execute() {
  63                 $this->dataDir = $this->getOption( 'data-dir', '.' );
  64
  65                 $allkeysPresent = file_exists( "{$this->dataDir}/allkeys.txt" );
  66                 $ucdallPresent = file_exists( "{$this->dataDir}/ucd.all.grouped.xml" );
  67
  68                 // As of January 2013, these links work for all versions of Unicode
  69                 // between 5.1 and 6.2, inclusive.
  70                 $allkeysURL = "http://www.unicode.org/Public/UCA/<Unicode version>/allkeys.txt";
  71                 $ucdallURL = "http://www.unicode.org/Public/<Unicode version>/ucdxml/ucd.all.grouped.zip";
  72
  73                 if ( !$allkeysPresent || !$ucdallPresent ) {
  74                         $icuVersion = IcuCollation::getICUVersion();
  75                         $unicodeVersion = IcuCollation::getUnicodeVersionForICU();
  76
  77                         $error = "";
  78
  79                         if ( !$allkeysPresent ) {
  80                                 $error .= "Unable to find allkeys.txt. "
  81                                         . "Download it and specify its location with --data-dir=<DIR>. "
  82                                         . "\n\n";
  83                         }
  84                         if ( !$ucdallPresent ) {
  85                                 $error .= "Unable to find ucd.all.grouped.xml. "
  86                                         . "Download it, unzip, and specify its location with --data-dir=<DIR>. "
  87                                         . "\n\n";
  88                         }
  89
  90                         $versionKnown = false;
  91                         if ( !$icuVersion ) {
  92                                 // Unknown version - either very old intl,
  93                                 // or PHP < 5.3.7 which does not expose this information
  94                                 $error .= "As MediaWiki could not determine the version of ICU library used by your PHP's "
  95                                         . "intl extension it can't suggest which file version to download. "
  96                                         . "This can be caused by running a very old version of intl or PHP < 5.3.7. "
  97                                         . "If you are sure everything is all right, find out the ICU version "
  98                                         . "by running phpinfo(), check what is the Unicode version it is using "
  99                                         . "at http://site.icu-project.org/download, then try finding appropriate data file(s) at:";
 100                         } elseif ( version_compare( $icuVersion, "4.0", "<" ) ) {
 101                                 // Extra old version
 102                                 $error .= "You are using outdated version of ICU ($icuVersion), intended for "
 103                                         . ( $unicodeVersion ? "Unicode $unicodeVersion" : "an unknown version of Unicode" )
 104                                         . "; this file might not be avalaible for it, and it's not supported by MediaWiki. "
 105                                         . " You are on your own; consider upgrading PHP's intl extension or try "
 106                                         . "one of the files available at:";
 107                         } elseif ( version_compare( $icuVersion, "51.0", ">=" ) ) {
 108                                 // Extra recent version
 109                                 $error .= "You are using ICU $icuVersion, released after this script was last updated. "
 110                                         . "Check what is the Unicode version it is using at http://site.icu-project.org/download . "
 111                                         . "It can't be guaranteed everything will work, but appropriate file(s) should "
 112                                         . "be available at:";
 113                         } else {
 114                                 // ICU 4.0 to 50.x
 115                                 $versionKnown = true;
 116                                 $error .= "You are using ICU $icuVersion, intended for "
 117                                         . ( $unicodeVersion ? "Unicode $unicodeVersion" : "an unknown version of Unicode" )
 118                                         . ". Appropriate file(s) should be available at:";
 119                         }
 120                         $error .= "\n";
 121
 122                         if ( $versionKnown && $unicodeVersion ) {
 123                                 $allkeysURL = str_replace( "<Unicode version>", "$unicodeVersion.0", $allkeysURL );
 124                                 $ucdallURL = str_replace( "<Unicode version>", "$unicodeVersion.0", $ucdallURL );
 125                         }
 126
 127                         if ( !$allkeysPresent ) {
 128                                 $error .= "* $allkeysURL\n";
 129                         }
 130                         if ( !$ucdallPresent ) {
 131                                 $error .= "* $ucdallURL\n";
 132                         }
 133
 134                         $this->error( $error );
 135                         exit( 1 );
 136                 }
 137
 138                 $debugOutFileName = $this->getOption( 'debug-output' );
 139                 if ( $debugOutFileName ) {
 140                         $this->debugOutFile = fopen( $debugOutFileName, 'w' );
 141                         if ( !$this->debugOutFile ) {
 142                                 $this->error( "Unable to open debug output file for writing" );
 143                                 exit( 1 );
 144                         }
 145                 }
 146                 $this->loadUcd();
 147                 $this->generateFirstChars();
 148         }
 149
 150         function loadUcd() {
 151                 $uxr = new UcdXmlReader( "{$this->dataDir}/ucd.all.grouped.xml" );
 152                 $uxr->readChars( array( $this, 'charCallback' ) );
 153         }
 154
 155         function charCallback( $data ) {
 156                 // Skip non-printable characters,
 157                 // but do not skip a normal space (U+0020) since
 158                 // people like to use that as a fake no header symbol.
 159                 $category = substr( $data['gc'], 0, 1 );
 160                 if ( strpos( 'LNPS', $category ) === false
 161                         && $data['cp'] !== '0020' ) {
 162                         return;
 163                 }
 164                 $cp = hexdec( $data['cp'] );
 165
 166                 // Skip the CJK ideograph blocks, as an optimisation measure.
 167                 // UCA doesn't sort them properly anyway, without tailoring.
 168                 if ( IcuCollation::isCjk( $cp ) ) {
 169                         return;
 170                 }
 171
 172                 // Skip the composed Hangul syllables, we will use the bare Jamo
 173                 // as first letters
 174                 if ( $data['block'] == 'Hangul Syllables' ) {
 175                         return;
 176                 }
 177
 178                 // Calculate implicit weight per UTS #10 v6.0.0, sec 7.1.3
 179                 if ( $data['UIdeo'] === 'Y' ) {
 180                         if ( $data['block'] == 'CJK Unified Ideographs'
 181                                 || $data['block'] == 'CJK Compatibility Ideographs' )
 182                         {
 183                                 $base = 0xFB40;
 184                         } else {
 185                                 $base = 0xFB80;
 186                         }
 187                 } else {
 188                         $base = 0xFBC0;
 189                 }
 190                 $a = $base + ( $cp >> 15 );
 191                 $b = ( $cp & 0x7fff ) | 0x8000;
 192
 193                 $this->weights[$cp] = sprintf( ".%04X.%04X", $a, $b );
 194
 195                 if ( $data['dm'] !== '#' ) {
 196                         $this->mappedChars[$cp] = true;
 197                 }
 198
 199                 if ( $cp % 4096 == 0 ) {
 200                         print "{$data['cp']}\n";
 201                 }
 202         }
 203
 204         function generateFirstChars() {
 205                 $file = fopen( "{$this->dataDir}/allkeys.txt", 'r' );
 206                 if ( !$file ) {
 207                         $this->error( "Unable to open allkeys.txt" );
 208                         exit( 1 );
 209                 }
 210                 global $IP;
 211                 $outFile = fopen( "$IP/serialized/first-letters-root.ser", 'w' );
 212                 if ( !$outFile ) {
 213                         $this->error( "Unable to open output file first-letters-root.ser" );
 214                         exit( 1 );
 215                 }
 216
 217                 $goodTertiaryChars = array();
 218
 219                 // For each character with an entry in allkeys.txt, overwrite the implicit
 220                 // entry in $this->weights that came from the UCD.
 221                 // Also gather a list of tertiary weights, for use in selecting the group header
 222                 while ( false !== ( $line = fgets( $file ) ) ) {
 223                         // We're only interested in single-character weights, pick them out with a regex
 224                         $line = trim( $line );
 225                         if ( !preg_match( '/^([0-9A-F]+)\s*;\s*([^#]*)/', $line, $m ) ) {
 226                                 continue;
 227                         }
 228
 229                         $cp = hexdec( $m[1] );
 230                         $allWeights = trim( $m[2] );
 231                         $primary = '';
 232                         $tertiary = '';
 233
 234                         if ( !isset( $this->weights[$cp] ) ) {
 235                                 // Non-printable, ignore
 236                                 continue;
 237                         }
 238                         foreach ( StringUtils::explode( '[', $allWeights ) as $weightStr ) {
 239                                 preg_match_all( '/[*.]([0-9A-F]+)/', $weightStr, $m );
 240                                 if ( !empty( $m[1] ) ) {
 241                                         if ( $m[1][0] !== '0000' ) {
 242                                                 $primary .= '.' . $m[1][0];
 243                                         }
 244                                         if ( $m[1][2] !== '0000' ) {
 245                                                 $tertiary .= '.' . $m[1][2];
 246                                         }
 247                                 }
 248                         }
 249                         $this->weights[$cp] = $primary;
 250                         if ( $tertiary === '.0008'
 251                                 || $tertiary === '.000E' )
 252                         {
 253                                 $goodTertiaryChars[$cp] = true;
 254                         }
 255                 }
 256                 fclose( $file );
 257
 258                 // Identify groups of characters with the same primary weight
 259                 $this->groups = array();
 260                 asort( $this->weights, SORT_STRING );
 261                 $prevWeight = reset( $this->weights );
 262                 $group = array();
 263                 foreach ( $this->weights as $cp => $weight ) {
 264                         if ( $weight !== $prevWeight ) {
 265                                 $this->groups[$prevWeight] = $group;
 266                                 $prevWeight = $weight;
 267                                 if ( isset( $this->groups[$weight] ) ) {
 268                                         $group = $this->groups[$weight];
 269                                 } else {
 270                                         $group = array();
 271                                 }
 272                         }
 273                         $group[] = $cp;
 274                 }
 275                 if ( $group ) {
 276                         $this->groups[$prevWeight] = $group;
 277                 }
 278
 279                 // If one character has a given primary weight sequence, and a second
 280                 // character has a longer primary weight sequence with an initial
 281                 // portion equal to the first character, then remove the second
 282                 // character. This avoids having characters like U+A732 (double A)
 283                 // polluting the basic latin sort area.
 284
 285                 foreach ( $this->groups as $weight => $group ) {
 286                         if ( preg_match( '/(\.[0-9A-F]*)\./', $weight, $m ) ) {
 287                                 if ( isset( $this->groups[$m[1]] ) ) {
 288                                         unset( $this->groups[$weight] );
 289                                 }
 290                         }
 291                 }
 292
 293                 ksort( $this->groups, SORT_STRING );
 294
 295                 // Identify the header character in each group
 296                 $headerChars = array();
 297                 $prevChar = "\000";
 298                 $tertiaryCollator = new Collator( 'root' );
 299                 $primaryCollator = new Collator( 'root' );
 300                 $primaryCollator->setStrength( Collator::PRIMARY );
 301                 $numOutOfOrder = 0;
 302                 foreach ( $this->groups as $weight => $group ) {
 303                         $uncomposedChars = array();
 304                         $goodChars = array();
 305                         foreach ( $group as $cp ) {
 306                                 if ( isset( $goodTertiaryChars[$cp] ) ) {
 307                                         $goodChars[] = $cp;
 308                                 }
 309                                 if ( !isset( $this->mappedChars[$cp] ) ) {
 310                                         $uncomposedChars[] = $cp;
 311                                 }
 312                         }
 313                         $x = array_intersect( $goodChars, $uncomposedChars );
 314                         if ( !$x ) {
 315                                 $x = $uncomposedChars;
 316                                 if ( !$x ) {
 317                                         $x = $group;
 318                                 }
 319                         }
 320
 321                         // Use ICU to pick the lowest sorting character in the selection
 322                         $tertiaryCollator->sort( $x );
 323                         $cp = $x[0];
 324
 325                         $char = codepointToUtf8( $cp );
 326                         $headerChars[] = $char;
 327                         if ( $primaryCollator->compare( $char, $prevChar ) <= 0 ) {
 328                                 $numOutOfOrder ++;
 329                                 /*
 330                                 printf( "Out of order: U+%05X > U+%05X\n",
 331                                         utf8ToCodepoint( $prevChar ),
 332                                         utf8ToCodepoint( $char ) );
 333                                  */
 334                         }
 335                         $prevChar = $char;
 336
 337                         if ( $this->debugOutFile ) {
 338                                 fwrite( $this->debugOutFile, sprintf( "%05X %s %s (%s)\n", $cp, $weight, $char,
 339                                         implode( ' ', array_map( 'codepointToUtf8', $group ) ) ) );
 340                         }
 341                 }
 342
 343                 print "Out of order: $numOutOfOrder / " . count( $headerChars ) . "\n";
 344
 345                 fwrite( $outFile, serialize( $headerChars ) );
 346         }
 347 }
 348
 349 class UcdXmlReader {
 350         public $fileName;
 351         public $callback;
 352         public $groupAttrs;
 353         public $xml;
 354         public $blocks = array();
 355         public $currentBlock;
 356
 357         function __construct( $fileName ) {
 358                 $this->fileName = $fileName;
 359         }
 360
 361         public function readChars( $callback ) {
 362                 $this->getBlocks();
 363                 $this->currentBlock = reset( $this->blocks );
 364                 $xml = $this->open();
 365                 $this->callback = $callback;
 366
 367                 while ( $xml->name !== 'repertoire' && $xml->next() );
 368
 369                 while ( $xml->read() ) {
 370                         if ( $xml->nodeType == XMLReader::ELEMENT ) {
 371                                 if ( $xml->name === 'group' ) {
 372                                         $this->groupAttrs = $this->readAttributes();
 373                                 } elseif ( $xml->name === 'char' ) {
 374                                         $this->handleChar();
 375                                 }
 376                         } elseif ( $xml->nodeType === XMLReader::END_ELEMENT ) {
 377                                 if ( $xml->name === 'group' ) {
 378                                         $this->groupAttrs = array();
 379                                 }
 380                         }
 381                 }
 382                 $xml->close();
 383         }
 384
 385         protected function open() {
 386                 $this->xml = new XMLReader;
 387                 $this->xml->open( $this->fileName );
 388                 if ( !$this->xml ) {
 389                         throw new MWException( __METHOD__ . ": unable to open {$this->fileName}" );
 390                 }
 391                 while ( $this->xml->name !== 'ucd' && $this->xml->read() );
 392                 $this->xml->read();
 393                 return $this->xml;
 394         }
 395
 396         /**
 397          * Read the attributes of the current element node and return them
 398          * as an array
 399          * @return array
 400          */
 401         protected function readAttributes() {
 402                 $attrs = array();
 403                 while ( $this->xml->moveToNextAttribute() ) {
 404                         $attrs[$this->xml->name] = $this->xml->value;
 405                 }
 406                 return $attrs;
 407         }
 408
 409         protected function handleChar() {
 410                 $attrs = $this->readAttributes() + $this->groupAttrs;
 411                 if ( isset( $attrs['cp'] ) ) {
 412                         $first = $last = hexdec( $attrs['cp'] );
 413                 } else {
 414                         $first = hexdec( $attrs['first-cp'] );
 415                         $last = hexdec( $attrs['last-cp'] );
 416                         unset( $attrs['first-cp'] );
 417                         unset( $attrs['last-cp'] );
 418                 }
 419
 420                 for ( $cp = $first; $cp <= $last; $cp++ ) {
 421                         $hexCp = sprintf( "%04X", $cp );
 422                         foreach ( array( 'na', 'na1' ) as $nameProp ) {
 423                                 if ( isset( $attrs[$nameProp] ) ) {
 424                                         $attrs[$nameProp] = str_replace( '#', $hexCp, $attrs[$nameProp] );
 425                                 }
 426                         }
 427
 428                         while ( $this->currentBlock ) {
 429                                 if ( $cp < $this->currentBlock[0] ) {
 430                                         break;
 431                                 } elseif ( $cp <= $this->currentBlock[1] ) {
 432                                         $attrs['block'] = key( $this->blocks );
 433                                         break;
 434                                 } else {
 435                                         $this->currentBlock = next( $this->blocks );
 436                                 }
 437                         }
 438
 439                         $attrs['cp'] = $hexCp;
 440                         call_user_func( $this->callback, $attrs );
 441                 }
 442         }
 443
 444         public function getBlocks() {
 445                 if ( $this->blocks ) {
 446                         return $this->blocks;
 447                 }
 448
 449                 $xml = $this->open();
 450                 while ( $xml->name !== 'blocks' && $xml->read() );
 451
 452                 while ( $xml->read() ) {
 453                         if ( $xml->nodeType == XMLReader::ELEMENT ) {
 454                                 if ( $xml->name === 'block' ) {
 455                                         $attrs = $this->readAttributes();
 456                                         $first = hexdec( $attrs['first-cp'] );
 457                                         $last = hexdec( $attrs['last-cp'] );
 458                                         $this->blocks[$attrs['name']] = array( $first, $last );
 459                                 }
 460                         }
 461                 }
 462                 $xml->close();
 463                 return $this->blocks;
 464         }
 465
 466 }
 467
 468 $maintClass = 'GenerateCollationData';
 469 require_once RUN_MAINTENANCE_IF_MAIN;