[Summary view] [Print] [Text view]

   1  <?php
   2  
   3  namespace LesserPHP\Functions;
   4  
   5  use Exception;
   6  use LesserPHP\Utils\Asserts;
   7  use LesserPHP\Utils\Util;
   8  
   9  /**
  10   * Implements the  miscellaneous functions for LESS
  11   *
  12   * @link https://lesscss.org/functions/#misc-functions
  13   */
  14  class Misc extends AbstractFunctionCollection
  15  {
  16      /** @inheritdoc */
  17      public function getFunctions(): array
  18      {
  19          return [
  20              //'color' => [$this, 'color'],
  21              //'image-size' => [$this, 'imageSize'],
  22              //'image-width' => [$this, 'imageWidth'],
  23              //'image-height' => [$this, 'imageHeight'],
  24              'convert' => [$this, 'convert'],
  25              'data-uri' => [$this, 'dataUri'],
  26              //'default' => [$this, 'default'],
  27              'unit' => [$this, 'unit'],
  28              //'get-unit' => [$this, 'getUnit'],
  29              //'svg-gradient' => [$this, 'svgGradient'],
  30          ];
  31      }
  32  
  33      // color is missing
  34      // image-size is missing
  35      // image-width is missing
  36      // image-height is missing
  37  
  38      /**
  39       * Convert a number from one unit into another
  40       *
  41       * @link https://lesscss.org/functions/#misc-functions-convert
  42       * @throws Exception
  43       */
  44      public function convert(array $args): array
  45      {
  46          [$value, $to] = Asserts::assertArgs($args, 2, 'convert');
  47  
  48          // If it's a keyword, grab the string version instead
  49          if (is_array($to) && $to[0] == 'keyword') {
  50              $to = $to[1];
  51          }
  52  
  53          return Util::convert($value, $to);
  54      }
  55  
  56      /**
  57       * Given an url, decide whether to output a regular link or the base64-encoded contents of the file
  58       *
  59       * @param array $value either an argument list (two strings) or a single string
  60       * @return string        formatted url(), either as a link or base64-encoded
  61       */
  62      public function dataUri(array $value): string
  63      {
  64          $mime = ($value[0] === 'list') ? $value[2][0][2] : null;
  65          $url = ($value[0] === 'list') ? $value[2][1][2][0] : $value[2][0];
  66  
  67          $fullpath = $this->lessc->findImport($url);
  68  
  69          if ($fullpath && ($fsize = filesize($fullpath)) !== false) {
  70              // IE8 can't handle data uris larger than 32KB
  71              if ($fsize / 1024 < 32) {
  72                  if (is_null($mime)) {
  73                      if (class_exists('finfo')) { // php 5.3+
  74                          $finfo = new \finfo(FILEINFO_MIME);
  75                          $mime = explode('; ', $finfo->file($fullpath));
  76                          $mime = $mime[0];
  77                      } elseif (function_exists('mime_content_type')) { // PHP 5.2
  78                          $mime = mime_content_type($fullpath);
  79                      }
  80                  }
  81  
  82                  if (!is_null($mime)) // fallback if the mime type is still unknown
  83                      $url = sprintf('data:%s;base64,%s', $mime, base64_encode(file_get_contents($fullpath)));
  84              }
  85          }
  86  
  87          return 'url("' . $url . '")';
  88      }
  89  
  90      // default is missing
  91  
  92  
  93      /**
  94       * Remove or change the unit of a dimension
  95       *
  96       * @link https://lesscss.org/functions/#misc-functions-unit
  97       * @throws Exception
  98       */
  99      public function unit(array $arg): array
 100      {
 101          if ($arg[0] == 'list') {
 102              [$number, $newUnit] = $arg[2];
 103              return [
 104                  'number',
 105                  Asserts::assertNumber($number),
 106                  $this->lessc->compileValue($this->lessc->unwrap($newUnit))
 107              ];
 108          } else {
 109              return ['number', Asserts::assertNumber($arg), ''];
 110          }
 111      }
 112  
 113      // get-unit is missing
 114      // svg-gradient is missing
 115  }