* @copyright 2012 Jim Wigginton * @license http://www.opensource.org/licenses/mit-license.html MIT License * @link http://phpseclib.sourceforge.net */ namespace phpseclib3\File; /** * Pure-PHP ANSI Decoder * * @author Jim Wigginton */ class ANSI { /** * Max Width * * @var int */ private $max_x; /** * Max Height * * @var int */ private $max_y; /** * Max History * * @var int */ private $max_history; /** * History * * @var array */ private $history; /** * History Attributes * * @var array */ private $history_attrs; /** * Current Column * * @var int */ private $x; /** * Current Row * * @var int */ private $y; /** * Old Column * * @var int */ private $old_x; /** * Old Row * * @var int */ private $old_y; /** * An empty attribute cell * * @var object */ private $base_attr_cell; /** * The current attribute cell * * @var object */ private $attr_cell; /** * An empty attribute row * * @var array */ private $attr_row; /** * The current screen text * * @var list */ private $screen; /** * The current screen attributes * * @var array */ private $attrs; /** * Current ANSI code * * @var string */ private $ansi; /** * Tokenization * * @var array */ private $tokenization; /** * Default Constructor. * * @return \phpseclib3\File\ANSI */ public function __construct() { $attr_cell = new \stdClass(); $attr_cell->bold = false; $attr_cell->underline = false; $attr_cell->blink = false; $attr_cell->background = 'black'; $attr_cell->foreground = 'white'; $attr_cell->reverse = false; $this->base_attr_cell = clone $attr_cell; $this->attr_cell = clone $attr_cell; $this->setHistory(200); $this->setDimensions(80, 24); } /** * Set terminal width and height * * Resets the screen as well * * @param int $x * @param int $y */ public function setDimensions($x, $y) { $this->max_x = $x - 1; $this->max_y = $y - 1; $this->x = $this->y = 0; $this->history = $this->history_attrs = []; $this->attr_row = array_fill(0, $this->max_x + 2, $this->base_attr_cell); $this->screen = array_fill(0, $this->max_y + 1, ''); $this->attrs = array_fill(0, $this->max_y + 1, $this->attr_row); $this->ansi = ''; } /** * Set the number of lines that should be logged past the terminal height * * @param int $history */ public function setHistory($history) { $this->max_history = $history; } /** * Load a string * * @param string $source */ public function loadString($source) { $this->setDimensions($this->max_x + 1, $this->max_y + 1); $this->appendString($source); } /** * Appdend a string * * @param string $source */ public function appendString($source) { $this->tokenization = ['']; for ($i = 0; $i < strlen($source); $i++) { if (strlen($this->ansi)) { $this->ansi .= $source[$i]; $chr = ord($source[$i]); // http://en.wikipedia.org/wiki/ANSI_escape_code#Sequence_elements // single character CSI's not currently supported switch (true) { case $this->ansi == "\x1B=": $this->ansi = ''; continue 2; case strlen($this->ansi) == 2 && $chr >= 64 && $chr <= 95 && $chr != ord('['): case strlen($this->ansi) > 2 && $chr >= 64 && $chr <= 126: break; default: continue 2; } $this->tokenization[] = $this->ansi; $this->tokenization[] = ''; // http://ascii-table.com/ansi-escape-sequences-vt-100.php switch ($this->ansi) { case "\x1B[H": // Move cursor to upper left corner $this->old_x = $this->x; $this->old_y = $this->y; $this->x = $this->y = 0; break; case "\x1B[J": // Clear screen from cursor down $this->history = array_merge($this->history, array_slice(array_splice($this->screen, $this->y + 1), 0, $this->old_y)); $this->screen = array_merge($this->screen, array_fill($this->y, $this->max_y, '')); $this->history_attrs = array_merge($this->history_attrs, array_slice(array_splice($this->attrs, $this->y + 1), 0, $this->old_y)); $this->attrs = array_merge($this->attrs, array_fill($this->y, $this->max_y, $this->attr_row)); if (count($this->history) == $this->max_history) { array_shift($this->history); array_shift($this->history_attrs); } // fall-through case "\x1B[K": // Clear screen from cursor right $this->screen[$this->y] = substr($this->screen[$this->y], 0, $this->x); array_splice($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)); break; case "\x1B[2K": // Clear entire line $this->screen[$this->y] = str_repeat(' ', $this->x); $this->attrs[$this->y] = $this->attr_row; break; case "\x1B[?1h": // set cursor key to application case "\x1B[?25h": // show the cursor case "\x1B(B": // set united states g0 character set break; case "\x1BE": // Move to next line $this->newLine(); $this->x = 0; break; default: switch (true) { case preg_match('#\x1B\[(\d+)B#', $this->ansi, $match): // Move cursor down n lines $this->old_y = $this->y; $this->y += (int) $match[1]; break; case preg_match('#\x1B\[(\d+);(\d+)H#', $this->ansi, $match): // Move cursor to screen location v,h $this->old_x = $this->x; $this->old_y = $this->y; $this->x = $match[2] - 1; $this->y = (int) $match[1] - 1; break; case preg_match('#\x1B\[(\d+)C#', $this->ansi, $match): // Move cursor right n lines $this->old_x = $this->x; $this->x += $match[1]; break; case preg_match('#\x1B\[(\d+)D#', $this->ansi, $match): // Move cursor left n lines $this->old_x = $this->x; $this->x -= $match[1]; if ($this->x < 0) { $this->x = 0; } break; case preg_match('#\x1B\[(\d+);(\d+)r#', $this->ansi, $match): // Set top and bottom lines of a window break; case preg_match('#\x1B\[(\d*(?:;\d*)*)m#', $this->ansi, $match): // character attributes $attr_cell = &$this->attr_cell; $mods = explode(';', $match[1]); foreach ($mods as $mod) { switch ($mod) { case '': case '0': // Turn off character attributes $attr_cell = clone $this->base_attr_cell; break; case '1': // Turn bold mode on $attr_cell->bold = true; break; case '4': // Turn underline mode on $attr_cell->underline = true; break; case '5': // Turn blinking mode on $attr_cell->blink = true; break; case '7': // Turn reverse video on $attr_cell->reverse = !$attr_cell->reverse; $temp = $attr_cell->background; $attr_cell->background = $attr_cell->foreground; $attr_cell->foreground = $temp; break; default: // set colors //$front = $attr_cell->reverse ? &$attr_cell->background : &$attr_cell->foreground; $front = &$attr_cell->{ $attr_cell->reverse ? 'background' : 'foreground' }; //$back = $attr_cell->reverse ? &$attr_cell->foreground : &$attr_cell->background; $back = &$attr_cell->{ $attr_cell->reverse ? 'foreground' : 'background' }; switch ($mod) { // @codingStandardsIgnoreStart case '30': $front = 'black'; break; case '31': $front = 'red'; break; case '32': $front = 'green'; break; case '33': $front = 'yellow'; break; case '34': $front = 'blue'; break; case '35': $front = 'magenta'; break; case '36': $front = 'cyan'; break; case '37': $front = 'white'; break; case '40': $back = 'black'; break; case '41': $back = 'red'; break; case '42': $back = 'green'; break; case '43': $back = 'yellow'; break; case '44': $back = 'blue'; break; case '45': $back = 'magenta'; break; case '46': $back = 'cyan'; break; case '47': $back = 'white'; break; // @codingStandardsIgnoreEnd default: //user_error('Unsupported attribute: ' . $mod); $this->ansi = ''; break 2; } } } break; default: //user_error("{$this->ansi} is unsupported\r\n"); } } $this->ansi = ''; continue; } $this->tokenization[count($this->tokenization) - 1] .= $source[$i]; switch ($source[$i]) { case "\r": $this->x = 0; break; case "\n": $this->newLine(); break; case "\x08": // backspace if ($this->x) { $this->x--; $this->attrs[$this->y][$this->x] = clone $this->base_attr_cell; $this->screen[$this->y] = substr_replace( $this->screen[$this->y], $source[$i], $this->x, 1 ); } break; case "\x0F": // shift break; case "\x1B": // start ANSI escape code $this->tokenization[count($this->tokenization) - 1] = substr($this->tokenization[count($this->tokenization) - 1], 0, -1); //if (!strlen($this->tokenization[count($this->tokenization) - 1])) { // array_pop($this->tokenization); //} $this->ansi .= "\x1B"; break; default: $this->attrs[$this->y][$this->x] = clone $this->attr_cell; if ($this->x > strlen($this->screen[$this->y])) { $this->screen[$this->y] = str_repeat(' ', $this->x); } $this->screen[$this->y] = substr_replace( $this->screen[$this->y], $source[$i], $this->x, 1 ); if ($this->x > $this->max_x) { $this->x = 0; $this->newLine(); } else { $this->x++; } } } } /** * Add a new line * * Also update the $this->screen and $this->history buffers * */ private function newLine() { //if ($this->y < $this->max_y) { // $this->y++; //} while ($this->y >= $this->max_y) { $this->history = array_merge($this->history, [array_shift($this->screen)]); $this->screen[] = ''; $this->history_attrs = array_merge($this->history_attrs, [array_shift($this->attrs)]); $this->attrs[] = $this->attr_row; if (count($this->history) >= $this->max_history) { array_shift($this->history); array_shift($this->history_attrs); } $this->y--; } $this->y++; } /** * Returns the current coordinate without preformating * * @param \stdClass $last_attr * @param \stdClass $cur_attr * @param string $char * @return string */ private function processCoordinate(\stdClass $last_attr, \stdClass $cur_attr, $char) { $output = ''; if ($last_attr != $cur_attr) { $close = $open = ''; if ($last_attr->foreground != $cur_attr->foreground) { if ($cur_attr->foreground != 'white') { $open .= ''; } if ($last_attr->foreground != 'white') { $close = '' . $close; } } if ($last_attr->background != $cur_attr->background) { if ($cur_attr->background != 'black') { $open .= ''; } if ($last_attr->background != 'black') { $close = '' . $close; } } if ($last_attr->bold != $cur_attr->bold) { if ($cur_attr->bold) { $open .= ''; } else { $close = '' . $close; } } if ($last_attr->underline != $cur_attr->underline) { if ($cur_attr->underline) { $open .= ''; } else { $close = '' . $close; } } if ($last_attr->blink != $cur_attr->blink) { if ($cur_attr->blink) { $open .= ''; } else { $close = '' . $close; } } $output .= $close . $open; } $output .= htmlspecialchars($char); return $output; } /** * Returns the current screen without preformating * * @return string */ private function getScreenHelper() { $output = ''; $last_attr = $this->base_attr_cell; for ($i = 0; $i <= $this->max_y; $i++) { for ($j = 0; $j <= $this->max_x; $j++) { $cur_attr = $this->attrs[$i][$j]; $output .= $this->processCoordinate($last_attr, $cur_attr, isset($this->screen[$i][$j]) ? $this->screen[$i][$j] : ''); $last_attr = $this->attrs[$i][$j]; } $output .= "\r\n"; } $output = substr($output, 0, -2); // close any remaining open tags $output .= $this->processCoordinate($last_attr, $this->base_attr_cell, ''); return rtrim($output); } /** * Returns the current screen * * @return string */ public function getScreen() { return '
' . $this->getScreenHelper() . '
'; } /** * Returns the current screen and the x previous lines * * @return string */ public function getHistory() { $scrollback = ''; $last_attr = $this->base_attr_cell; for ($i = 0; $i < count($this->history); $i++) { for ($j = 0; $j <= $this->max_x + 1; $j++) { $cur_attr = $this->history_attrs[$i][$j]; $scrollback .= $this->processCoordinate($last_attr, $cur_attr, isset($this->history[$i][$j]) ? $this->history[$i][$j] : ''); $last_attr = $this->history_attrs[$i][$j]; } $scrollback .= "\r\n"; } $base_attr_cell = $this->base_attr_cell; $this->base_attr_cell = $last_attr; $scrollback .= $this->getScreen(); $this->base_attr_cell = $base_attr_cell; return '
' . $scrollback . '
'; } }