lib/lessphp/Output/Mapped.php

   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 }