126 lines
3.9 KiB
PHP
126 lines
3.9 KiB
PHP
<?php
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/**
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* Created by IntelliJ IDEA.
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* User: philippe-adrien
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* Date: 2019-01-19
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* Time: 12:27
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*/
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namespace OCA\TestNextcloudApp\Controller;
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/**
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* Converts an ANSI text to HTML5.
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*/
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class AnsiToHtmlConverter
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{
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protected $charset;
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protected $inlineStyles;
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protected $inlineColors;
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protected $colorNames;
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public function __construct($inlineStyles = true, $charset = 'UTF-8')
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{
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$this->inlineStyles = $inlineStyles;
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$this->charset = $charset;
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$this->colorNames = array(
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'black', 'red', 'green', 'yellow', 'blue', 'magenta', 'cyan', 'white',
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'', '',
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'brblack', 'brred', 'brgreen', 'bryellow', 'brblue', 'brmagenta', 'brcyan', 'brwhite',
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);
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}
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public function convert($text)
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{
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// remove cursor movement sequences
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$text = preg_replace('#\e\[(K|s|u|2J|2K|\d+(A|B|C|D|E|F|G|J|K|S|T)|\d+;\d+(H|f))#', '', $text);
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// remove character set sequences
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$text = preg_replace('#\e(\(|\))(A|B|[0-2])#', '', $text);
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$text = htmlspecialchars($text, PHP_VERSION_ID >= 50400 ? ENT_QUOTES | ENT_SUBSTITUTE : ENT_QUOTES, $this->charset);
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// carriage return
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$text = preg_replace('#^.*\r(?!\n)#m', '', $text);
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$tokens = $this->tokenize($text);
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// a backspace remove the previous character but only from a text token
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foreach ($tokens as $i => $token) {
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if ('backspace' == $token[0]) {
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$j = $i;
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while (--$j >= 0) {
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if ('text' == $tokens[$j][0] && strlen($tokens[$j][1]) > 0) {
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$tokens[$j][1] = substr($tokens[$j][1], 0, -1);
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break;
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}
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}
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}
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}
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$html = '';
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foreach ($tokens as $token) {
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if ('text' == $token[0]) {
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$html .= $token[1];
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} elseif ('color' == $token[0]) {
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$html .= $this->convertAnsiToColor($token[1]);
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}
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}
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if ($this->inlineStyles) {
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$html = sprintf('<span style="background-color: %s; color: %s">%s</span>', $this->inlineColors['black'], $this->inlineColors['white'], $html);
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} else {
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$html = sprintf('<span class="ansi_color_bg_black ansi_color_fg_white">%s</span>', $html);
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}
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// remove empty span
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$html = preg_replace('#<span[^>]*></span>#', '', $html);
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return $html;
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}
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protected function convertAnsiToColor($ansi)
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{
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$bg = 0;
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$fg = 7;
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$as = '';
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if ('0' != $ansi && '' != $ansi) {
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$options = explode(';', $ansi);
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foreach ($options as $option) {
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if ($option >= 30 && $option < 38) {
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$fg = $option - 30;
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} elseif ($option >= 40 && $option < 48) {
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$bg = $option - 40;
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} elseif (39 == $option) {
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$fg = 7;
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} elseif (49 == $option) {
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$bg = 0;
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}
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}
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// options: bold => 1, underscore => 4, blink => 5, reverse => 7, conceal => 8
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if (in_array(1, $options)) {
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$fg += 10;
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$bg += 10;
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}
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if (in_array(4, $options)) {
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$as = '; text-decoration: underline';
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}
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if (in_array(7, $options)) {
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$tmp = $fg;
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$fg = $bg;
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$bg = $tmp;
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}
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}
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if ($this->inlineStyles) {
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return sprintf('</span><span style="background-color: %s; color: %s%s">', $this->inlineColors[$this->colorNames[$bg]], $this->inlineColors[$this->colorNames[$fg]], $as);
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} else {
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return sprintf('</span><span class="ansi_color_bg_%s ansi_color_fg_%s">', $this->colorNames[$bg], $this->colorNames[$fg]);
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}
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}
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protected function tokenize($text)
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{
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$tokens = array();
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preg_match_all("/(?:\e\[(.*?)m|(\x08))/", $text, $matches, PREG_OFFSET_CAPTURE);
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$offset = 0;
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foreach ($matches[0] as $i => $match) {
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if ($match[1] - $offset > 0) {
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$tokens[] = array('text', substr($text, $offset, $match[1] - $offset));
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}
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$tokens[] = array("\x08" == $match[0] ? 'backspace' : 'color', $matches[1][$i][0]);
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$offset = $match[1] + strlen($match[0]);
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}
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if ($offset < strlen($text)) {
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$tokens[] = array('text', substr($text, $offset));
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}
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return $tokens;
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}
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}
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