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   1  <?php
   2  
   3  /**

   4   * Parser output with source map

   5   *

   6   * @package Less

   7   * @subpackage Output

   8   */
   9  class Less_Output_Mapped extends Less_Output {
  10  
  11      /**

  12       * The source map generator

  13       *

  14       * @var Less_SourceMap_Generator

  15       */
  16      protected $generator;
  17  
  18      /**

  19       * Current line

  20       *

  21       * @var integer

  22       */
  23      protected $lineNumber = 0;
  24  
  25      /**

  26       * Current column

  27       *

  28       * @var integer

  29       */
  30      protected $column = 0;
  31  
  32      /**

  33       * Array of contents map (file and its content)

  34       *

  35       * @var array

  36       */
  37      protected $contentsMap = array();
  38  
  39      /**

  40       * Constructor

  41       *

  42       * @param array $contentsMap Array of filename to contents map

  43       * @param Less_SourceMap_Generator $generator

  44       */
  45  	public function __construct(array $contentsMap, $generator){
  46          $this->contentsMap = $contentsMap;
  47          $this->generator = $generator;
  48      }
  49  
  50      /**

  51       * Adds a chunk to the stack

  52       * The $index for less.php may be different from less.js since less.php does not chunkify inputs

  53       *

  54       * @param string $chunk

  55       * @param string $fileInfo

  56       * @param integer $index

  57       * @param mixed $mapLines

  58       */
  59  	public function add($chunk, $fileInfo = null, $index = 0, $mapLines = null){
  60  
  61          //ignore adding empty strings

  62          if( $chunk === '' ){
  63              return;
  64          }
  65  
  66  
  67          $sourceLines = array();
  68          $sourceColumns = ' ';
  69  
  70  
  71          if( $fileInfo ){
  72  
  73              $url = $fileInfo['currentUri'];
  74  
  75              if( isset($this->contentsMap[$url]) ){
  76                  $inputSource = substr($this->contentsMap[$url], 0, $index);
  77                  $sourceLines = explode("\n", $inputSource);
  78                  $sourceColumns = end($sourceLines);
  79              }else{
  80                  throw new Exception('Filename '.$url.' not in contentsMap');
  81              }
  82  
  83          }
  84  
  85          $lines = explode("\n", $chunk);
  86          $columns = end($lines);
  87  
  88          if($fileInfo){
  89  
  90              if(!$mapLines){
  91                  $this->generator->addMapping(
  92                          $this->lineNumber + 1,                    // generated_line
  93                          $this->column,                            // generated_column
  94                          count($sourceLines),                    // original_line
  95                          strlen($sourceColumns),                    // original_column
  96                          $fileInfo
  97                  );
  98              }else{
  99                  for($i = 0, $count = count($lines); $i < $count; $i++){
 100                      $this->generator->addMapping(
 101                          $this->lineNumber + $i + 1,                // generated_line
 102                          $i === 0 ? $this->column : 0,            // generated_column
 103                          count($sourceLines) + $i,                // original_line
 104                          $i === 0 ? strlen($sourceColumns) : 0,     // original_column
 105                          $fileInfo
 106                      );
 107                  }
 108              }
 109          }
 110  
 111          if(count($lines) === 1){
 112              $this->column += strlen($columns);
 113          }else{
 114              $this->lineNumber += count($lines) - 1;
 115              $this->column = strlen($columns);
 116          }
 117  
 118          // add only chunk

 119          parent::add($chunk);
 120      }
 121  
 122  }