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1 <?php 2 3 /** 4 * Pure-PHP ANSI Decoder 5 * 6 * PHP version 5 7 * 8 * If you call read() in \phpseclib3\Net\SSH2 you may get {@link http://en.wikipedia.org/wiki/ANSI_escape_code ANSI escape codes} back. 9 * They'd look like chr(0x1B) . '[00m' or whatever (0x1B = ESC). They tell a 10 * {@link http://en.wikipedia.org/wiki/Terminal_emulator terminal emulator} how to format the characters, what 11 * color to display them in, etc. \phpseclib3\File\ANSI is a {@link http://en.wikipedia.org/wiki/VT100 VT100} terminal emulator. 12 * 13 * @category File 14 * @package ANSI 15 * @author Jim Wigginton <[email protected]> 16 * @copyright 2012 Jim Wigginton 17 * @license http://www.opensource.org/licenses/mit-license.html MIT License 18 * @link http://phpseclib.sourceforge.net 19 */ 20 21 namespace phpseclib3\File; 22 23 /** 24 * Pure-PHP ANSI Decoder 25 * 26 * @package ANSI 27 * @author Jim Wigginton <[email protected]> 28 * @access public 29 */ 30 class ANSI 31 { 32 /** 33 * Max Width 34 * 35 * @var int 36 * @access private 37 */ 38 private $max_x; 39 40 /** 41 * Max Height 42 * 43 * @var int 44 * @access private 45 */ 46 private $max_y; 47 48 /** 49 * Max History 50 * 51 * @var int 52 * @access private 53 */ 54 private $max_history; 55 56 /** 57 * History 58 * 59 * @var array 60 * @access private 61 */ 62 private $history; 63 64 /** 65 * History Attributes 66 * 67 * @var array 68 * @access private 69 */ 70 private $history_attrs; 71 72 /** 73 * Current Column 74 * 75 * @var int 76 * @access private 77 */ 78 private $x; 79 80 /** 81 * Current Row 82 * 83 * @var int 84 * @access private 85 */ 86 private $y; 87 88 /** 89 * Old Column 90 * 91 * @var int 92 * @access private 93 */ 94 private $old_x; 95 96 /** 97 * Old Row 98 * 99 * @var int 100 * @access private 101 */ 102 private $old_y; 103 104 /** 105 * An empty attribute cell 106 * 107 * @var object 108 * @access private 109 */ 110 private $base_attr_cell; 111 112 /** 113 * The current attribute cell 114 * 115 * @var object 116 * @access private 117 */ 118 private $attr_cell; 119 120 /** 121 * An empty attribute row 122 * 123 * @var array 124 * @access private 125 */ 126 private $attr_row; 127 128 /** 129 * The current screen text 130 * 131 * @var list<string> 132 * @access private 133 */ 134 private $screen; 135 136 /** 137 * The current screen attributes 138 * 139 * @var array 140 * @access private 141 */ 142 private $attrs; 143 144 /** 145 * Current ANSI code 146 * 147 * @var string 148 * @access private 149 */ 150 private $ansi; 151 152 /** 153 * Tokenization 154 * 155 * @var array 156 * @access private 157 */ 158 private $tokenization; 159 160 /** 161 * Default Constructor. 162 * 163 * @return \phpseclib3\File\ANSI 164 * @access public 165 */ 166 public function __construct() 167 { 168 $attr_cell = new \stdClass(); 169 $attr_cell->bold = false; 170 $attr_cell->underline = false; 171 $attr_cell->blink = false; 172 $attr_cell->background = 'black'; 173 $attr_cell->foreground = 'white'; 174 $attr_cell->reverse = false; 175 $this->base_attr_cell = clone $attr_cell; 176 $this->attr_cell = clone $attr_cell; 177 178 $this->setHistory(200); 179 $this->setDimensions(80, 24); 180 } 181 182 /** 183 * Set terminal width and height 184 * 185 * Resets the screen as well 186 * 187 * @param int $x 188 * @param int $y 189 * @access public 190 */ 191 public function setDimensions($x, $y) 192 { 193 $this->max_x = $x - 1; 194 $this->max_y = $y - 1; 195 $this->x = $this->y = 0; 196 $this->history = $this->history_attrs = []; 197 $this->attr_row = array_fill(0, $this->max_x + 2, $this->base_attr_cell); 198 $this->screen = array_fill(0, $this->max_y + 1, ''); 199 $this->attrs = array_fill(0, $this->max_y + 1, $this->attr_row); 200 $this->ansi = ''; 201 } 202 203 /** 204 * Set the number of lines that should be logged past the terminal height 205 * 206 * @param int $history 207 * @access public 208 */ 209 public function setHistory($history) 210 { 211 $this->max_history = $history; 212 } 213 214 /** 215 * Load a string 216 * 217 * @param string $source 218 * @access public 219 */ 220 public function loadString($source) 221 { 222 $this->setDimensions($this->max_x + 1, $this->max_y + 1); 223 $this->appendString($source); 224 } 225 226 /** 227 * Appdend a string 228 * 229 * @param string $source 230 * @access public 231 */ 232 public function appendString($source) 233 { 234 $this->tokenization = ['']; 235 for ($i = 0; $i < strlen($source); $i++) { 236 if (strlen($this->ansi)) { 237 $this->ansi .= $source[$i]; 238 $chr = ord($source[$i]); 239 // http://en.wikipedia.org/wiki/ANSI_escape_code#Sequence_elements 240 // single character CSI's not currently supported 241 switch (true) { 242 case $this->ansi == "\x1B=": 243 $this->ansi = ''; 244 continue 2; 245 case strlen($this->ansi) == 2 && $chr >= 64 && $chr <= 95 && $chr != ord('['): 246 case strlen($this->ansi) > 2 && $chr >= 64 && $chr <= 126: 247 break; 248 default: 249 continue 2; 250 } 251 $this->tokenization[] = $this->ansi; 252 $this->tokenization[] = ''; 253 // http://ascii-table.com/ansi-escape-sequences-vt-100.php 254 switch ($this->ansi) { 255 case "\x1B[H": // Move cursor to upper left corner 256 $this->old_x = $this->x; 257 $this->old_y = $this->y; 258 $this->x = $this->y = 0; 259 break; 260 case "\x1B[J": // Clear screen from cursor down 261 $this->history = array_merge($this->history, array_slice(array_splice($this->screen, $this->y + 1), 0, $this->old_y)); 262 $this->screen = array_merge($this->screen, array_fill($this->y, $this->max_y, '')); 263 264 $this->history_attrs = array_merge($this->history_attrs, array_slice(array_splice($this->attrs, $this->y + 1), 0, $this->old_y)); 265 $this->attrs = array_merge($this->attrs, array_fill($this->y, $this->max_y, $this->attr_row)); 266 267 if (count($this->history) == $this->max_history) { 268 array_shift($this->history); 269 array_shift($this->history_attrs); 270 } 271 // fall-through 272 case "\x1B[K": // Clear screen from cursor right 273 $this->screen[$this->y] = substr($this->screen[$this->y], 0, $this->x); 274 275 array_splice($this->attrs[$this->y], $this->x + 1, $this->max_x - $this->x, array_fill($this->x, $this->max_x - ($this->x - 1), $this->base_attr_cell)); 276 break; 277 case "\x1B[2K": // Clear entire line 278 $this->screen[$this->y] = str_repeat(' ', $this->x); 279 $this->attrs[$this->y] = $this->attr_row; 280 break; 281 case "\x1B[?1h": // set cursor key to application 282 case "\x1B[?25h": // show the cursor 283 case "\x1B(B": // set united states g0 character set 284 break; 285 case "\x1BE": // Move to next line 286 $this->newLine(); 287 $this->x = 0; 288 break; 289 default: 290 switch (true) { 291 case preg_match('#\x1B\[(\d+)B#', $this->ansi, $match): // Move cursor down n lines 292 $this->old_y = $this->y; 293 $this->y += (int) $match[1]; 294 break; 295 case preg_match('#\x1B\[(\d+);(\d+)H#', $this->ansi, $match): // Move cursor to screen location v,h 296 $this->old_x = $this->x; 297 $this->old_y = $this->y; 298 $this->x = $match[2] - 1; 299 $this->y = (int) $match[1] - 1; 300 break; 301 case preg_match('#\x1B\[(\d+)C#', $this->ansi, $match): // Move cursor right n lines 302 $this->old_x = $this->x; 303 $this->x += $match[1]; 304 break; 305 case preg_match('#\x1B\[(\d+)D#', $this->ansi, $match): // Move cursor left n lines 306 $this->old_x = $this->x; 307 $this->x -= $match[1]; 308 if ($this->x < 0) { 309 $this->x = 0; 310 } 311 break; 312 case preg_match('#\x1B\[(\d+);(\d+)r#', $this->ansi, $match): // Set top and bottom lines of a window 313 break; 314 case preg_match('#\x1B\[(\d*(?:;\d*)*)m#', $this->ansi, $match): // character attributes 315 $attr_cell = &$this->attr_cell; 316 $mods = explode(';', $match[1]); 317 foreach ($mods as $mod) { 318 switch ($mod) { 319 case '': 320 case '0': // Turn off character attributes 321 $attr_cell = clone $this->base_attr_cell; 322 break; 323 case '1': // Turn bold mode on 324 $attr_cell->bold = true; 325 break; 326 case '4': // Turn underline mode on 327 $attr_cell->underline = true; 328 break; 329 case '5': // Turn blinking mode on 330 $attr_cell->blink = true; 331 break; 332 case '7': // Turn reverse video on 333 $attr_cell->reverse = !$attr_cell->reverse; 334 $temp = $attr_cell->background; 335 $attr_cell->background = $attr_cell->foreground; 336 $attr_cell->foreground = $temp; 337 break; 338 default: // set colors 339 //$front = $attr_cell->reverse ? &$attr_cell->background : &$attr_cell->foreground; 340 $front = &$attr_cell->{ $attr_cell->reverse ? 'background' : 'foreground' }; 341 //$back = $attr_cell->reverse ? &$attr_cell->foreground : &$attr_cell->background; 342 $back = &$attr_cell->{ $attr_cell->reverse ? 'foreground' : 'background' }; 343 switch ($mod) { 344 // @codingStandardsIgnoreStart 345 case '30': $front = 'black'; break; 346 case '31': $front = 'red'; break; 347 case '32': $front = 'green'; break; 348 case '33': $front = 'yellow'; break; 349 case '34': $front = 'blue'; break; 350 case '35': $front = 'magenta'; break; 351 case '36': $front = 'cyan'; break; 352 case '37': $front = 'white'; break; 353 354 case '40': $back = 'black'; break; 355 case '41': $back = 'red'; break; 356 case '42': $back = 'green'; break; 357 case '43': $back = 'yellow'; break; 358 case '44': $back = 'blue'; break; 359 case '45': $back = 'magenta'; break; 360 case '46': $back = 'cyan'; break; 361 case '47': $back = 'white'; break; 362 // @codingStandardsIgnoreEnd 363 364 default: 365 //user_error('Unsupported attribute: ' . $mod); 366 $this->ansi = ''; 367 break 2; 368 } 369 } 370 } 371 break; 372 default: 373 //user_error("{$this->ansi} is unsupported\r\n"); 374 } 375 } 376 $this->ansi = ''; 377 continue; 378 } 379 380 $this->tokenization[count($this->tokenization) - 1] .= $source[$i]; 381 switch ($source[$i]) { 382 case "\r": 383 $this->x = 0; 384 break; 385 case "\n": 386 $this->newLine(); 387 break; 388 case "\x08": // backspace 389 if ($this->x) { 390 $this->x--; 391 $this->attrs[$this->y][$this->x] = clone $this->base_attr_cell; 392 $this->screen[$this->y] = substr_replace( 393 $this->screen[$this->y], 394 $source[$i], 395 $this->x, 396 1 397 ); 398 } 399 break; 400 case "\x0F": // shift 401 break; 402 case "\x1B": // start ANSI escape code 403 $this->tokenization[count($this->tokenization) - 1] = substr($this->tokenization[count($this->tokenization) - 1], 0, -1); 404 //if (!strlen($this->tokenization[count($this->tokenization) - 1])) { 405 // array_pop($this->tokenization); 406 //} 407 $this->ansi .= "\x1B"; 408 break; 409 default: 410 $this->attrs[$this->y][$this->x] = clone $this->attr_cell; 411 if ($this->x > strlen($this->screen[$this->y])) { 412 $this->screen[$this->y] = str_repeat(' ', $this->x); 413 } 414 $this->screen[$this->y] = substr_replace( 415 $this->screen[$this->y], 416 $source[$i], 417 $this->x, 418 1 419 ); 420 421 if ($this->x > $this->max_x) { 422 $this->x = 0; 423 $this->newLine(); 424 } else { 425 $this->x++; 426 } 427 } 428 } 429 } 430 431 /** 432 * Add a new line 433 * 434 * Also update the $this->screen and $this->history buffers 435 * 436 * @access private 437 */ 438 private function newLine() 439 { 440 //if ($this->y < $this->max_y) { 441 // $this->y++; 442 //} 443 444 while ($this->y >= $this->max_y) { 445 $this->history = array_merge($this->history, [array_shift($this->screen)]); 446 $this->screen[] = ''; 447 448 $this->history_attrs = array_merge($this->history_attrs, [array_shift($this->attrs)]); 449 $this->attrs[] = $this->attr_row; 450 451 if (count($this->history) >= $this->max_history) { 452 array_shift($this->history); 453 array_shift($this->history_attrs); 454 } 455 456 $this->y--; 457 } 458 $this->y++; 459 } 460 461 /** 462 * Returns the current coordinate without preformating 463 * 464 * @access private 465 * @param \stdClass $last_attr 466 * @param \stdClass $cur_attr 467 * @param string $char 468 * @return string 469 */ 470 private function processCoordinate($last_attr, $cur_attr, $char) 471 { 472 $output = ''; 473 474 if ($last_attr != $cur_attr) { 475 $close = $open = ''; 476 if ($last_attr->foreground != $cur_attr->foreground) { 477 if ($cur_attr->foreground != 'white') { 478 $open .= '<span style="color: ' . $cur_attr->foreground . '">'; 479 } 480 if ($last_attr->foreground != 'white') { 481 $close = '</span>' . $close; 482 } 483 } 484 if ($last_attr->background != $cur_attr->background) { 485 if ($cur_attr->background != 'black') { 486 $open .= '<span style="background: ' . $cur_attr->background . '">'; 487 } 488 if ($last_attr->background != 'black') { 489 $close = '</span>' . $close; 490 } 491 } 492 if ($last_attr->bold != $cur_attr->bold) { 493 if ($cur_attr->bold) { 494 $open .= '<b>'; 495 } else { 496 $close = '</b>' . $close; 497 } 498 } 499 if ($last_attr->underline != $cur_attr->underline) { 500 if ($cur_attr->underline) { 501 $open .= '<u>'; 502 } else { 503 $close = '</u>' . $close; 504 } 505 } 506 if ($last_attr->blink != $cur_attr->blink) { 507 if ($cur_attr->blink) { 508 $open .= '<blink>'; 509 } else { 510 $close = '</blink>' . $close; 511 } 512 } 513 $output .= $close . $open; 514 } 515 516 $output .= htmlspecialchars($char); 517 518 return $output; 519 } 520 521 /** 522 * Returns the current screen without preformating 523 * 524 * @access private 525 * @return string 526 */ 527 private function getScreenHelper() 528 { 529 $output = ''; 530 $last_attr = $this->base_attr_cell; 531 for ($i = 0; $i <= $this->max_y; $i++) { 532 for ($j = 0; $j <= $this->max_x; $j++) { 533 $cur_attr = $this->attrs[$i][$j]; 534 $output .= $this->processCoordinate($last_attr, $cur_attr, isset($this->screen[$i][$j]) ? $this->screen[$i][$j] : ''); 535 $last_attr = $this->attrs[$i][$j]; 536 } 537 $output .= "\r\n"; 538 } 539 $output = substr($output, 0, -2); 540 // close any remaining open tags 541 $output .= $this->processCoordinate($last_attr, $this->base_attr_cell, ''); 542 return rtrim($output); 543 } 544 545 /** 546 * Returns the current screen 547 * 548 * @access public 549 * @return string 550 */ 551 public function getScreen() 552 { 553 return '<pre width="' . ($this->max_x + 1) . '" style="color: white; background: black">' . $this->getScreenHelper() . '</pre>'; 554 } 555 556 /** 557 * Returns the current screen and the x previous lines 558 * 559 * @access public 560 * @return string 561 */ 562 public function getHistory() 563 { 564 $scrollback = ''; 565 $last_attr = $this->base_attr_cell; 566 for ($i = 0; $i < count($this->history); $i++) { 567 for ($j = 0; $j <= $this->max_x + 1; $j++) { 568 $cur_attr = $this->history_attrs[$i][$j]; 569 $scrollback .= $this->processCoordinate($last_attr, $cur_attr, isset($this->history[$i][$j]) ? $this->history[$i][$j] : ''); 570 $last_attr = $this->history_attrs[$i][$j]; 571 } 572 $scrollback .= "\r\n"; 573 } 574 $base_attr_cell = $this->base_attr_cell; 575 $this->base_attr_cell = $last_attr; 576 $scrollback .= $this->getScreen(); 577 $this->base_attr_cell = $base_attr_cell; 578 579 return '<pre width="' . ($this->max_x + 1) . '" style="color: white; background: black">' . $scrollback . '</span></pre>'; 580 } 581 }
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