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<?php
/**
* Pure-PHP ANSI Decoder
*
* PHP versions 4 and 5
*
* If you call read() in Net_SSH2 you may get {@link http://en.wikipedia.org/wiki/ANSI_escape_code ANSI escape codes} back.
* They'd look like chr(0x1B) . '[00m' or whatever (0x1B = ESC). They tell a
* {@link http://en.wikipedia.org/wiki/Terminal_emulator terminal emulator} how to format the characters, what
* color to display them in, etc. File_ANSI is a {@link http://en.wikipedia.org/wiki/VT100 VT100} terminal emulator.
*
* LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @category File
* @package File_ANSI
* @author Jim Wigginton <terrafrost@php.net>
* @copyright MMXII Jim Wigginton
* @license http://www.opensource.org/licenses/mit-license.html MIT License
* @link http://phpseclib.sourceforge.net
*/
/**
* Pure-PHP ANSI Decoder
*
* @package File_ANSI
* @author Jim Wigginton <terrafrost@php.net>
* @access public
*/
class File_ANSI
{
/**
* Max Width
*
* @var Integer
* @access private
*/
public $max_x;
/**
* Max Height
*
* @var Integer
* @access private
*/
public $max_y;
/**
* Max History
*
* @var Integer
* @access private
*/
public $max_history;
/**
* History
*
* @var Array
* @access private
*/
public $history;
/**
* History Attributes
*
* @var Array
* @access private
*/
public $history_attrs;
/**
* Current Column
*
* @var Integer
* @access private
*/
public $x;
/**
* Current Row
*
* @var Integer
* @access private
*/
public $y;
/**
* Old Column
*
* @var Integer
* @access private
*/
public $old_x;
/**
* Old Row
*
* @var Integer
* @access private
*/
public $old_y;
/**
* An empty attribute row
*
* @var Array
* @access private
*/
public $attr_row;
/**
* The current screen text
*
* @var Array
* @access private
*/
public $screen;
/**
* The current screen attributes
*
* @var Array
* @access private
*/
public $attrs;
/**
* The current foreground color
*
* @var String
* @access private
*/
public $foreground;
/**
* The current background color
*
* @var String
* @access private
*/
public $background;
/**
* Bold flag
*
* @var Boolean
* @access private
*/
public $bold;
/**
* Underline flag
*
* @var Boolean
* @access private
*/
public $underline;
/**
* Blink flag
*
* @var Boolean
* @access private
*/
public $blink;
/**
* Reverse flag
*
* @var Boolean
* @access private
*/
public $reverse;
/**
* Color flag
*
* @var Boolean
* @access private
*/
public $color;
/**
* Current ANSI code
*
* @var String
* @access private
*/
public $ansi;
/**
* Default Constructor.
*
* @return File_ANSI
* @access public
*/
public function __construct()
{
$this->setHistory(200);
$this->setDimensions(80, 24);
}
/**
* Set terminal width and height
*
* Resets the screen as well
*
* @param Integer $x
* @param Integer $y
*
* @access public
*/
public function setDimensions($x, $y)
{
$this->max_x = $x - 1;
$this->max_y = $y - 1;
$this->x = $this->y = 0;
$this->history = $this->history_attrs = array();
$this->attr_row = array_fill(0, $this->max_x + 1, '');
$this->screen = array_fill(0, $this->max_y + 1, '');
$this->attrs = array_fill(0, $this->max_y + 1, $this->attr_row);
$this->foreground = 'white';
$this->background = 'black';
$this->bold = false;
$this->underline = false;
$this->blink = false;
$this->reverse = false;
$this->color = false;
$this->ansi = '';
}
/**
* Set the number of lines that should be logged past the terminal height
*
* @param Integer $x
* @param Integer $y
*
* @access public
*/
public function setHistory($history)
{
$this->max_history = $history;
}
/**
* Load a string
*
* @param String $source
*
* @access public
*/
public function loadString($source)
{
$this->setDimensions($this->max_x + 1, $this->max_y + 1);
$this->appendString($source);
}
/**
* Appdend a string
*
* @param String $source
*
* @access public
*/
public function appendString($source)
{
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 && $chr <= 126:
break;
default:
continue 2;
}
// http://ascii-table.com/ansi-escape-sequences-vt-100.php
switch ($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);
}
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);
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
break;
case "\x1BE": // Move to next line
$this->_newLine();
$this->x = 0;
break;
default:
switch (true) {
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 = $match[1] - 1;
break;
case preg_match('#\x1B\[(\d+)C#', $this->ansi, $match): // Move cursor right n lines
$this->old_x = $this->x;
$x = $match[1] - 1;
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
$mods = explode(';', $match[1]);
foreach ($mods as $mod) {
switch ($mod) {
case 0: // Turn off character attributes
$this->attrs[$this->y][$this->x] = '';
if ($this->bold) {
$this->attrs[$this->y][$this->x] .= '</b>';
}
if ($this->underline) {
$this->attrs[$this->y][$this->x] .= '</u>';
}
if ($this->blink) {
$this->attrs[$this->y][$this->x] .= '</blink>';
}
if ($this->color) {
$this->attrs[$this->y][$this->x] .= '</span>';
}
if ($this->reverse) {
$temp = $this->background;
$this->background = $this->foreground;
$this->foreground = $temp;
}
$this->bold = $this->underline = $this->blink = $this->color = $this->reverse = false;
break;
case 1: // Turn bold mode on
if (!$this->bold) {
$this->attrs[$this->y][$this->x] = '<b>';
$this->bold = true;
}
break;
case 4: // Turn underline mode on
if (!$this->underline) {
$this->attrs[$this->y][$this->x] = '<u>';
$this->underline = true;
}
break;
case 5: // Turn blinking mode on
if (!$this->blink) {
$this->attrs[$this->y][$this->x] = '<blink>';
$this->blink = true;
}
break;
case 7: // Turn reverse video on
$this->reverse = !$this->reverse;
$temp = $this->background;
$this->background = $this->foreground;
$this->foreground = $temp;
$this->attrs[$this->y][$this->x] = '<span style="color: '.$this->foreground.'; background: '.$this->background.'">';
if ($this->color) {
$this->attrs[$this->y][$this->x] = '</span>'.$this->attrs[$this->y][$this->x];
}
$this->color = true;
break;
default: // set colors
//$front = $this->reverse ? &$this->background : &$this->foreground;
$front = &$this->{$this->reverse ? 'background' : 'foreground'};
//$back = $this->reverse ? &$this->foreground : &$this->background;
$back = &$this->{$this->reverse ? 'foreground' : 'background'};
switch ($mod) {
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:
$back = 'white';
break;
default:
user_error('Unsupported attribute: '.$mod);
$this->ansi = '';
break 2;
}
unset($temp);
$this->attrs[$this->y][$this->x] = '<span style="color: '.$this->foreground.'; background: '.$this->background.'">';
if ($this->color) {
$this->attrs[$this->y][$this->x] = '</span>'.$this->attrs[$this->y][$this->x];
}
$this->color = true;
}
}
break;
default:
user_error("{$this->ansi} unsupported\r\n");
}
}
$this->ansi = '';
continue;
}
switch ($source[$i]) {
case "\r":
$this->x = 0;
break;
case "\n":
$this->_newLine();
break;
case "\x0F": // shift
break;
case "\x1B": // start ANSI escape code
$this->ansi .= "\x1B";
break;
default:
$this->screen[$this->y] = substr_replace(
$this->screen[$this->y],
$source[$i],
$this->x,
1
);
if ($this->x > $this->max_x) {
$this->x = 0;
$this->y++;
} else {
$this->x++;
}
}
}
}
/**
* Add a new line
*
* Also update the $this->screen and $this->history buffers
*
* @access private
*/
public function _newLine()
{
//if ($this->y < $this->max_y) {
// $this->y++;
//}
while ($this->y >= $this->max_y) {
$this->history = array_merge($this->history, array(array_shift($this->screen)));
$this->screen[] = '';
$this->history_attrs = array_merge($this->history_attrs, array(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 screen without preformating
*
* @access private
* @return String
*/
public function _getScreen()
{
$output = '';
for ($i = 0; $i <= $this->max_y; $i++) {
for ($j = 0; $j <= $this->max_x + 1; $j++) {
if (isset($this->attrs[$i][$j])) {
$output .= $this->attrs[$i][$j];
}
if (isset($this->screen[$i][$j])) {
$output .= htmlspecialchars($this->screen[$i][$j]);
}
}
$output .= "\r\n";
}
return rtrim($output);
}
/**
* Returns the current screen
*
* @access public
* @return String
*/
public function getScreen()
{
return '<pre style="color: white; background: black" width="'.($this->max_x + 1).'">'.$this->_getScreen().'</pre>';
}
/**
* Returns the current screen and the x previous lines
*
* @access public
* @return String
*/
public function getHistory()
{
$scrollback = '';
for ($i = 0; $i < count($this->history); $i++) {
for ($j = 0; $j <= $this->max_x + 1; $j++) {
if (isset($this->history_attrs[$i][$j])) {
$scrollback .= $this->history_attrs[$i][$j];
}
if (isset($this->history[$i][$j])) {
$scrollback .= htmlspecialchars($this->history[$i][$j]);
}
}
$scrollback .= "\r\n";
}
$scrollback .= $this->_getScreen();
return '<pre style="color: white; background: black" width="'.($this->max_x + 1).'">'.$scrollback.'</pre>';
}
}
