mirror of
https://we.phorge.it/source/phorge.git
synced 2024-11-27 01:02:42 +01:00
6bd8ee861c
Summary: Ref T7785. Makes Figlet available without installing the `figlet` package. The PEAR Text_Figlet code is really sketchy and includes this API, which is quite marvelous: ``` function loadFont($filename, $loadgerman = true) ``` At some point, this should probably be rewritten into a modern style, but it's not trivial since the figlet file format and rendering engine are somewhat complicated. I made some adjustments: - Broke the dependency on the PEAR core. - Prevented it from doing any wrong HTML escaping. - Looked through it for any glaring security or correctness problems. This code isn't very pretty or modern, but as far as I can tell it's safe and does render Figlet fonts in a reasonable way. Test Plan: {F803268} Reviewers: chad Reviewed By: chad Maniphest Tasks: T9408, T7785 Differential Revision: https://secure.phabricator.com/D14102
500 lines
14 KiB
PHP
500 lines
14 KiB
PHP
<?php
|
|
/* vim: set expandtab tabstop=4 softtabstop=4 shiftwidth=4: */
|
|
/**
|
|
* ASCII art text creation
|
|
*
|
|
* Project home page (Russian): http://bolknote.ru/files/figlet/
|
|
*
|
|
* PHP Version 4
|
|
*
|
|
* @category Text
|
|
* @package Text_Figlet
|
|
* @author Evgeny Stepanischev <imbolk@gmail.com>
|
|
* @author Christian Weiske <cweiske@php.net>
|
|
* @license http://www.php.net/license PHP License
|
|
* @version CVS: $Id$
|
|
* @link http://pear.php.net/package/Text_Figlet
|
|
*/
|
|
|
|
/**
|
|
* ASCII art text creation
|
|
*
|
|
* Project home page (Russian): http://bolknote.ru/files/figlet/
|
|
*
|
|
* PHP Version 4
|
|
*
|
|
* @category Text
|
|
* @package Text_Figlet
|
|
* @author Evgeny Stepanischev <imbolk@gmail.com>
|
|
* @author Christian Weiske <cweiske@php.net>
|
|
* @license http://www.php.net/license PHP License
|
|
* @link http://pear.php.net/package/Text_Figlet
|
|
*/
|
|
class Text_Figlet
|
|
{
|
|
/**
|
|
* Height of a letter
|
|
*
|
|
* @var integer
|
|
*
|
|
* @access protected
|
|
*/
|
|
var $height;
|
|
|
|
/**
|
|
* Letter baseline
|
|
*
|
|
* @var integer
|
|
*
|
|
* @access protected
|
|
*/
|
|
var $oldlayout;
|
|
|
|
/**
|
|
* Flag - RTL (right to left) or LTR (left to right) text direction
|
|
*
|
|
* @var integer
|
|
*
|
|
* @access protected
|
|
*/
|
|
var $rtol;
|
|
|
|
/**
|
|
* Information about special 'hardblank' character
|
|
*
|
|
* @var integer
|
|
*
|
|
* @access protected
|
|
*/
|
|
var $hardblank;
|
|
|
|
/**
|
|
* Is used for keeping font
|
|
*
|
|
* @var array
|
|
*
|
|
* @access protected
|
|
*/
|
|
var $font;
|
|
|
|
/**
|
|
* Flag is true if smushing occured in letters printing cycle
|
|
*
|
|
* @var integer
|
|
*
|
|
* @access protected
|
|
*/
|
|
var $smush_flag;
|
|
|
|
/**
|
|
* Comment lines buffer
|
|
*
|
|
* @var string
|
|
*
|
|
* @access public
|
|
*/
|
|
|
|
var $font_comment;
|
|
|
|
|
|
/**
|
|
* Load user font. Must be invoked first.
|
|
* Automatically tries the Text_Figlet font data directory
|
|
* as long as no path separator is in the filename.
|
|
*
|
|
* @param string $filename font file name
|
|
* @param bool $loadgerman (optional) load German character set or not
|
|
*
|
|
* @access public
|
|
* @return mixed PEAR_Error or true for success
|
|
*/
|
|
function loadFont($filename, $loadgerman = true)
|
|
{
|
|
$this->font = array();
|
|
if (!file_exists($filename)) {
|
|
return self::raiseError('Figlet font file "'
|
|
. $filename
|
|
. '" cannot be found', 1);
|
|
}
|
|
|
|
$this->font_comment = '';
|
|
|
|
// If Gzip compressed font
|
|
if (substr($filename, -3, 3) == '.gz') {
|
|
$filename = 'compress.zlib://' . $filename;
|
|
$compressed = true;
|
|
|
|
if (!function_exists('gzcompress')) {
|
|
return self::raiseError('Cannot load gzip compressed fonts since'
|
|
. ' gzcompress() is not available.',
|
|
3);
|
|
}
|
|
} else {
|
|
$compressed = false;
|
|
}
|
|
|
|
if (!($fp = fopen($filename, 'rb'))) {
|
|
return self::raiseError('Cannot open figlet font file ' . $filename, 2);
|
|
}
|
|
|
|
if (!$compressed) {
|
|
/* ZIPed font */
|
|
if (fread($fp, 2) == 'PK') {
|
|
if (!function_exists('zip_open')) {
|
|
return self::raiseError('Cannot load ZIP compressed fonts since'
|
|
. ' ZIP PHP extension is not available.',
|
|
5);
|
|
}
|
|
|
|
fclose($fp);
|
|
|
|
if (!($fp = zip_open($filename))) {
|
|
return self::raiseError('Cannot open figlet font file ' . $filename, 2);
|
|
}
|
|
|
|
$name = zip_entry_name(zip_read($fp));
|
|
zip_close($fp);
|
|
|
|
if (!($fp = fopen('zip://' . realpath($filename) . '#' . $name, 'rb'))) {
|
|
return self::raiseError('Cannot open figlet font file ' . $filename, 2);
|
|
}
|
|
|
|
$compressed = true;
|
|
} else {
|
|
flock($fp, LOCK_SH);
|
|
rewind($fp);
|
|
}
|
|
}
|
|
|
|
// flf2a$ 6 5 20 15 3 0 143 229
|
|
// | | | | | | | | | |
|
|
// / / | | | | | | | \
|
|
// Signature / / | | | | | \ Codetag_Count
|
|
// Hardblank / / | | | \ Full_Layout
|
|
// Height / | | \ Print_Direction
|
|
// Baseline / \ Comment_Lines
|
|
// Max_Length Old_Layout
|
|
|
|
|
|
$header = explode(' ', fgets($fp, 2048));
|
|
|
|
if (substr($header[0], 0, 5) <> 'flf2a') {
|
|
return self::raiseError('Unknown FIGlet font format.', 4);
|
|
}
|
|
|
|
@list ($this->hardblank, $this->height,,,
|
|
$this->oldlayout, $cmt_count, $this->rtol) = $header;
|
|
|
|
$this->hardblank = substr($this->hardblank, -1, 1);
|
|
|
|
for ($i = 0; $i < $cmt_count; $i++) {
|
|
$this->font_comment .= fgets($fp, 2048);
|
|
}
|
|
|
|
// ASCII charcters
|
|
for ($i = 32; $i < 127; $i++) {
|
|
$this->font[$i] = $this->_char($fp);
|
|
}
|
|
|
|
foreach (array(196, 214, 220, 228, 246, 252, 223) as $i) {
|
|
if ($loadgerman) {
|
|
$letter = $this->_char($fp);
|
|
|
|
// Invalid character but main font is loaded and I can use it
|
|
if ($letter === false) {
|
|
fclose($fp);
|
|
return true;
|
|
}
|
|
|
|
// Load if it is not blank only
|
|
if (trim(implode('', $letter)) <> '') {
|
|
$this->font[$i] = $letter;
|
|
}
|
|
} else {
|
|
$this->_skip($fp);
|
|
}
|
|
}
|
|
|
|
// Extented characters
|
|
for ($n = 0; !feof($fp); $n++) {
|
|
list ($i) = explode(' ', rtrim(fgets($fp, 1024)), 2);
|
|
if ($i == '') {
|
|
continue;
|
|
}
|
|
|
|
// If comment
|
|
if (preg_match('/^\-0x/i', $i)) {
|
|
$this->_skip($fp);
|
|
} else {
|
|
// If Unicode
|
|
if (preg_match('/^0x/i', $i)) {
|
|
$i = hexdec(substr($i, 2));
|
|
} else {
|
|
// If octal
|
|
if ($i{0} === '0' && $i !== '0' || substr($i, 0, 2) == '-0') {
|
|
$i = octdec($i);
|
|
}
|
|
}
|
|
|
|
$letter = $this->_char($fp);
|
|
|
|
// Invalid character but main font is loaded and I can use it
|
|
if ($letter === false) {
|
|
fclose($fp);
|
|
return true;
|
|
}
|
|
|
|
$this->font[$i] = $letter;
|
|
}
|
|
}
|
|
|
|
fclose($fp);
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Print string using font loaded by LoadFont method
|
|
*
|
|
* @param string $str string for printing
|
|
* @param bool $inhtml (optional) output mode
|
|
* - HTML (true) or plain text (false)
|
|
*
|
|
* @access public
|
|
* @return string contains
|
|
*/
|
|
function lineEcho($str, $inhtml = false)
|
|
{
|
|
$out = array();
|
|
|
|
for ($i = 0; $i<strlen($str); $i++) {
|
|
// Pseudo Unicode support
|
|
if (substr($str, $i, 2) == '%u') {
|
|
$lt = hexdec(substr($str, $i+2, 4));
|
|
$i += 5;
|
|
} else {
|
|
$lt = ord($str{$i});
|
|
}
|
|
|
|
$hb = preg_quote($this->hardblank, '/');
|
|
$sp = "$hb\\x00\\s";
|
|
|
|
// If chosen character not found try to use default
|
|
// If default character is not defined skip it
|
|
|
|
if (!isset($this->font[$lt])) {
|
|
if (isset($this->font[0])) {
|
|
$lt = 0;
|
|
} else {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
for ($j = 0; $j < $this->height; $j++) {
|
|
$line = $this->font[$lt][$j];
|
|
|
|
// Replace hardblanks
|
|
if (isset($out[$j])) {
|
|
if ($this->rtol) {
|
|
$out[$j] = $line . $out[$j];
|
|
} else {
|
|
$out[$j] .= $line;
|
|
}
|
|
} else {
|
|
$out[$j] = $line;
|
|
}
|
|
}
|
|
|
|
if ($this->oldlayout > -1 && $i) {
|
|
// Calculate minimal distance between two last letters
|
|
|
|
$mindiff = -1;
|
|
|
|
for ($j = 0; $j < $this->height; $j++) {
|
|
if (preg_match("/\S(\s*\\x00\s*)\S/", $out[$j], $r)) {
|
|
if ($mindiff == -1) {
|
|
$mindiff = strlen($r[1]);
|
|
} else {
|
|
$mindiff = min($mindiff, strlen($r[1]));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Remove spaces between two last letter
|
|
// dec mindiff for exclude \x00 symbol
|
|
|
|
if (--$mindiff > 0) {
|
|
for ($j = 0; $j < $this->height; $j++) {
|
|
if (preg_match("/\\x00(\s{0,{$mindiff}})/", $out[$j], $r)) {
|
|
$l = strlen($r[1]);
|
|
$b = $mindiff - $l;
|
|
$out[$j] = preg_replace("/\s{0,$b}\\x00\s{{$l}}/",
|
|
"\0",
|
|
$out[$j],
|
|
1);
|
|
}
|
|
}
|
|
}
|
|
// Smushing
|
|
|
|
$this->smush_flag = 0;
|
|
|
|
for ($j = 0; $j < $this->height; $j++) {
|
|
$out[$j] = preg_replace_callback("#([^$sp])\\x00([^$sp])#",
|
|
array(&$this, '_rep'),
|
|
$out[$j]);
|
|
}
|
|
|
|
// Remove one space if smushing
|
|
// and remove all \x00 except tail whenever
|
|
|
|
if ($this->smush_flag) {
|
|
$pat = array("/\s\\x00(?!$)|\\x00\s/", "/\\x00(?!$)/");
|
|
$rep = array('', '');
|
|
} else {
|
|
$pat = "/\\x00(?!$)/";
|
|
$rep = '';
|
|
}
|
|
|
|
for ($j = 0; $j<$this->height; $j++) {
|
|
$out[$j] = preg_replace($pat, $rep, $out[$j]);
|
|
}
|
|
}
|
|
}
|
|
|
|
$trans = array("\0" => '', $this->hardblank => ' ');
|
|
$str = strtr(implode("\n", $out), $trans);
|
|
|
|
if ($inhtml) {
|
|
self::raiseError(
|
|
'Do not use the HTML escaping provided by this class in '.
|
|
'a Phabricator context.');
|
|
}
|
|
|
|
return $str;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* It is preg_replace callback function that makes horizontal letter smushing
|
|
*
|
|
* @param array $r preg_replace matches array
|
|
*
|
|
* @return string
|
|
* @access private
|
|
*/
|
|
function _rep($r)
|
|
{
|
|
if ($this->oldlayout & 1 && $r[1] == $r[2]) {
|
|
$this->smush_flag = 1;
|
|
return $r[1];
|
|
}
|
|
|
|
if ($this->oldlayout & 2) {
|
|
$symb = '|/\\[]{}()<>';
|
|
|
|
if ($r[1] == '_' && strpos($symb, $r[2]) !== false ||
|
|
$r[2] == '_' && strpos($symb, $r[1]) !== false) {
|
|
$this->smush_flag = 1;
|
|
return $r[1];
|
|
}
|
|
}
|
|
|
|
if ($this->oldlayout & 4) {
|
|
$classes = '|/\\[]{}()<>';
|
|
|
|
if (($left = strpos($classes, $r[1])) !== false) {
|
|
if (($right = strpos($classes, $r[2])) !== false) {
|
|
$this->smush_flag = 1;
|
|
return $right > $left ? $r[2] : $r[1];
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($this->oldlayout & 8) {
|
|
$t = array('[' => ']', ']' => '[', '{' => '}', '}' => '{',
|
|
'(' => ')', ')' => '(');
|
|
|
|
if (isset($t[$r[2]]) && $r[1] == $t[$r[2]]) {
|
|
$this->smush_flag = 1;
|
|
return '|';
|
|
}
|
|
}
|
|
|
|
if ($this->oldlayout & 16) {
|
|
$t = array("/\\" => '|', "\\/" => 'Y', '><' => 'X');
|
|
|
|
if (isset($t[$r[1].$r[2]])) {
|
|
$this->smush_flag = 1;
|
|
return $t[$r[1].$r[2]];
|
|
}
|
|
}
|
|
|
|
if ($this->oldlayout & 32) {
|
|
if ($r[1] == $r[2] && $r[1] == $this->hardblank) {
|
|
$this->smush_flag = 1;
|
|
return $this->hardblank;
|
|
}
|
|
}
|
|
|
|
return $r[1]."\00".$r[2];
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Function loads one character in the internal array from file
|
|
*
|
|
* @param resource &$fp handle of font file
|
|
*
|
|
* @return mixed lines of the character or false if foef occured
|
|
* @access private
|
|
*/
|
|
function _char(&$fp)
|
|
{
|
|
$out = array();
|
|
|
|
for ($i = 0; $i < $this->height; $i++) {
|
|
if (feof($fp)) {
|
|
return false;
|
|
}
|
|
|
|
$line = rtrim(fgets($fp, 2048), "\r\n");
|
|
if (preg_match('/(.){1,2}$/', $line, $r)) {
|
|
$line = str_replace($r[1], '', $line);
|
|
}
|
|
|
|
$line .= "\x00";
|
|
|
|
$out[] = $line;
|
|
}
|
|
|
|
return $out;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Function for skipping one character in a font file
|
|
*
|
|
* @param resource &$fp handle of font file
|
|
*
|
|
* @return boolean always return true
|
|
* @access private
|
|
*/
|
|
function _skip(&$fp)
|
|
{
|
|
for ($i = 0; $i<$this->height && !feof($fp); $i++) {
|
|
fgets($fp, 2048);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
private static function raiseError($message, $code = 1) {
|
|
throw new Exception($message);
|
|
}
|
|
}
|