Chris@4: <?php
Chris@4: namespace JakubOnderka\PhpConsoleHighlighter;
Chris@4: 
Chris@4: use JakubOnderka\PhpConsoleColor\ConsoleColor;
Chris@4: 
Chris@4: class Highlighter
Chris@4: {
Chris@4:     const TOKEN_DEFAULT = 'token_default',
Chris@4:         TOKEN_COMMENT = 'token_comment',
Chris@4:         TOKEN_STRING = 'token_string',
Chris@4:         TOKEN_HTML = 'token_html',
Chris@4:         TOKEN_KEYWORD = 'token_keyword';
Chris@4: 
Chris@4:     const ACTUAL_LINE_MARK = 'actual_line_mark',
Chris@4:         LINE_NUMBER = 'line_number';
Chris@4: 
Chris@4:     /** @var ConsoleColor */
Chris@4:     private $color;
Chris@4: 
Chris@4:     /** @var array */
Chris@4:     private $defaultTheme = array(
Chris@4:         self::TOKEN_STRING => 'red',
Chris@4:         self::TOKEN_COMMENT => 'yellow',
Chris@4:         self::TOKEN_KEYWORD => 'green',
Chris@4:         self::TOKEN_DEFAULT => 'default',
Chris@4:         self::TOKEN_HTML => 'cyan',
Chris@4: 
Chris@4:         self::ACTUAL_LINE_MARK  => 'red',
Chris@4:         self::LINE_NUMBER => 'dark_gray',
Chris@4:     );
Chris@4: 
Chris@4:     /**
Chris@4:      * @param ConsoleColor $color
Chris@4:      * @throws \JakubOnderka\PhpConsoleColor\InvalidStyleException
Chris@4:      */
Chris@4:     public function __construct(ConsoleColor $color)
Chris@4:     {
Chris@4:         $this->color = $color;
Chris@4: 
Chris@4:         foreach ($this->defaultTheme as $name => $styles) {
Chris@4:             if (!$this->color->hasTheme($name)) {
Chris@4:                 $this->color->addTheme($name, $styles);
Chris@4:             }
Chris@4:         }
Chris@4:     }
Chris@4: 
Chris@4:     /**
Chris@4:      * @param string $source
Chris@4:      * @param int $lineNumber
Chris@4:      * @param int $linesBefore
Chris@4:      * @param int $linesAfter
Chris@4:      * @return string
Chris@4:      * @throws \JakubOnderka\PhpConsoleColor\InvalidStyleException
Chris@4:      * @throws \InvalidArgumentException
Chris@4:      */
Chris@4:     public function getCodeSnippet($source, $lineNumber, $linesBefore = 2, $linesAfter = 2)
Chris@4:     {
Chris@4:         $tokenLines = $this->getHighlightedLines($source);
Chris@4: 
Chris@4:         $offset = $lineNumber - $linesBefore - 1;
Chris@4:         $offset = max($offset, 0);
Chris@4:         $length = $linesAfter + $linesBefore + 1;
Chris@4:         $tokenLines = array_slice($tokenLines, $offset, $length, $preserveKeys = true);
Chris@4: 
Chris@4:         $lines = $this->colorLines($tokenLines);
Chris@4: 
Chris@4:         return $this->lineNumbers($lines, $lineNumber);
Chris@4:     }
Chris@4: 
Chris@4:     /**
Chris@4:      * @param string $source
Chris@4:      * @return string
Chris@4:      * @throws \JakubOnderka\PhpConsoleColor\InvalidStyleException
Chris@4:      * @throws \InvalidArgumentException
Chris@4:      */
Chris@4:     public function getWholeFile($source)
Chris@4:     {
Chris@4:         $tokenLines = $this->getHighlightedLines($source);
Chris@4:         $lines = $this->colorLines($tokenLines);
Chris@4:         return implode(PHP_EOL, $lines);
Chris@4:     }
Chris@4: 
Chris@4:     /**
Chris@4:      * @param string $source
Chris@4:      * @return string
Chris@4:      * @throws \JakubOnderka\PhpConsoleColor\InvalidStyleException
Chris@4:      * @throws \InvalidArgumentException
Chris@4:      */
Chris@4:     public function getWholeFileWithLineNumbers($source)
Chris@4:     {
Chris@4:         $tokenLines = $this->getHighlightedLines($source);
Chris@4:         $lines = $this->colorLines($tokenLines);
Chris@4:         return $this->lineNumbers($lines);
Chris@4:     }
Chris@4: 
Chris@4:     /**
Chris@4:      * @param string $source
Chris@4:      * @return array
Chris@4:      */
Chris@4:     private function getHighlightedLines($source)
Chris@4:     {
Chris@4:         $source = str_replace(array("\r\n", "\r"), "\n", $source);
Chris@4:         $tokens = $this->tokenize($source);
Chris@4:         return $this->splitToLines($tokens);
Chris@4:     }
Chris@4: 
Chris@4:     /**
Chris@4:      * @param string $source
Chris@4:      * @return array
Chris@4:      */
Chris@4:     private function tokenize($source)
Chris@4:     {
Chris@4:         $tokens = token_get_all($source);
Chris@4: 
Chris@4:         $output = array();
Chris@4:         $currentType = null;
Chris@4:         $buffer = '';
Chris@4: 
Chris@4:         foreach ($tokens as $token) {
Chris@4:             if (is_array($token)) {
Chris@4:                 switch ($token[0]) {
Chris@4:                     case T_WHITESPACE:
Chris@4:                         break;
Chris@4: 
Chris@4:                     case T_OPEN_TAG:
Chris@4:                     case T_OPEN_TAG_WITH_ECHO:
Chris@4:                     case T_CLOSE_TAG:
Chris@4:                     case T_STRING:
Chris@4:                     case T_VARIABLE:
Chris@4: 
Chris@4:                     // Constants
Chris@4:                     case T_DIR:
Chris@4:                     case T_FILE:
Chris@4:                     case T_METHOD_C:
Chris@4:                     case T_DNUMBER:
Chris@4:                     case T_LNUMBER:
Chris@4:                     case T_NS_C:
Chris@4:                     case T_LINE:
Chris@4:                     case T_CLASS_C:
Chris@4:                     case T_FUNC_C:
Chris@4:                     case T_TRAIT_C:
Chris@4:                         $newType = self::TOKEN_DEFAULT;
Chris@4:                         break;
Chris@4: 
Chris@4:                     case T_COMMENT:
Chris@4:                     case T_DOC_COMMENT:
Chris@4:                         $newType = self::TOKEN_COMMENT;
Chris@4:                         break;
Chris@4: 
Chris@4:                     case T_ENCAPSED_AND_WHITESPACE:
Chris@4:                     case T_CONSTANT_ENCAPSED_STRING:
Chris@4:                         $newType = self::TOKEN_STRING;
Chris@4:                         break;
Chris@4: 
Chris@4:                     case T_INLINE_HTML:
Chris@4:                         $newType = self::TOKEN_HTML;
Chris@4:                         break;
Chris@4: 
Chris@4:                     default:
Chris@4:                         $newType = self::TOKEN_KEYWORD;
Chris@4:                 }
Chris@4:             } else {
Chris@4:                 $newType = $token === '"' ? self::TOKEN_STRING : self::TOKEN_KEYWORD;
Chris@4:             }
Chris@4: 
Chris@4:             if ($currentType === null) {
Chris@4:                 $currentType = $newType;
Chris@4:             }
Chris@4: 
Chris@4:             if ($currentType !== $newType) {
Chris@4:                 $output[] = array($currentType, $buffer);
Chris@4:                 $buffer = '';
Chris@4:                 $currentType = $newType;
Chris@4:             }
Chris@4: 
Chris@4:             $buffer .= is_array($token) ? $token[1] : $token;
Chris@4:         }
Chris@4: 
Chris@4:         if (isset($newType)) {
Chris@4:             $output[] = array($newType, $buffer);
Chris@4:         }
Chris@4: 
Chris@4:         return $output;
Chris@4:     }
Chris@4: 
Chris@4:     /**
Chris@4:      * @param array $tokens
Chris@4:      * @return array
Chris@4:      */
Chris@4:     private function splitToLines(array $tokens)
Chris@4:     {
Chris@4:         $lines = array();
Chris@4: 
Chris@4:         $line = array();
Chris@4:         foreach ($tokens as $token) {
Chris@4:             foreach (explode("\n", $token[1]) as $count => $tokenLine) {
Chris@4:                 if ($count > 0) {
Chris@4:                     $lines[] = $line;
Chris@4:                     $line = array();
Chris@4:                 }
Chris@4: 
Chris@4:                 if ($tokenLine === '') {
Chris@4:                     continue;
Chris@4:                 }
Chris@4: 
Chris@4:                 $line[] = array($token[0], $tokenLine);
Chris@4:             }
Chris@4:         }
Chris@4: 
Chris@4:         $lines[] = $line;
Chris@4: 
Chris@4:         return $lines;
Chris@4:     }
Chris@4: 
Chris@4:     /**
Chris@4:      * @param array $tokenLines
Chris@4:      * @return array
Chris@4:      * @throws \JakubOnderka\PhpConsoleColor\InvalidStyleException
Chris@4:      * @throws \InvalidArgumentException
Chris@4:      */
Chris@4:     private function colorLines(array $tokenLines)
Chris@4:     {
Chris@4:         $lines = array();
Chris@4:         foreach ($tokenLines as $lineCount => $tokenLine) {
Chris@4:             $line = '';
Chris@4:             foreach ($tokenLine as $token) {
Chris@4:                 list($tokenType, $tokenValue) = $token;
Chris@4:                 if ($this->color->hasTheme($tokenType)) {
Chris@4:                     $line .= $this->color->apply($tokenType, $tokenValue);
Chris@4:                 } else {
Chris@4:                     $line .= $tokenValue;
Chris@4:                 }
Chris@4:             }
Chris@4:             $lines[$lineCount] = $line;
Chris@4:         }
Chris@4: 
Chris@4:         return $lines;
Chris@4:     }
Chris@4: 
Chris@4:     /**
Chris@4:      * @param array $lines
Chris@4:      * @param null|int $markLine
Chris@4:      * @return string
Chris@4:      * @throws \JakubOnderka\PhpConsoleColor\InvalidStyleException
Chris@4:      */
Chris@4:     private function lineNumbers(array $lines, $markLine = null)
Chris@4:     {
Chris@4:         end($lines);
Chris@4:         $lineStrlen = strlen(key($lines) + 1);
Chris@4: 
Chris@4:         $snippet = '';
Chris@4:         foreach ($lines as $i => $line) {
Chris@4:             if ($markLine !== null) {
Chris@4:                 $snippet .= ($markLine === $i + 1 ? $this->color->apply(self::ACTUAL_LINE_MARK, '  > ') : '    ');
Chris@4:             }
Chris@4: 
Chris@4:             $snippet .= $this->color->apply(self::LINE_NUMBER, str_pad($i + 1, $lineStrlen, ' ', STR_PAD_LEFT) . '| ');
Chris@4:             $snippet .= $line . PHP_EOL;
Chris@4:         }
Chris@4: 
Chris@4:         return $snippet;
Chris@4:     }
Chris@4: }