protected function CssOptimizer::processCssMin in Advanced CSS/JS Aggregation 8.2

Processes the contents of a stylesheet through CSSMin for minification.

Parameters

string $contents: The contents of the stylesheet.

Return value

string Minified contents of the stylesheet including the imported stylesheets.

1 call to CssOptimizer::processCssMin()

CssOptimizer::loadFile in advagg_css_minify/src/Asset/CssOptimizer.php

Loads the stylesheet and resolves all @import commands.

File

advagg_css_minify/src/Asset/CssOptimizer.php, line 208

Class

CssOptimizer

Optimizes a CSS asset.

Namespace

Drupal\advagg_css_minify\Asset

Code

protected function processCssMin($contents) {
  $contents = $this
    ->clean($contents);
  if (!class_exists('CSSmin')) {
    include drupal_get_path('module', 'advagg_css_minify') . '/yui/CSSMin.inc';
  }
  $cssmin = new \CSSmin(TRUE);

  // Minify the CSS splitting lines after 4k of text.
  $contents = $cssmin
    ->run($contents, 4096);

  // Replaces @import commands with the actual stylesheet content.
  // This happens recursively but omits external files.
  $contents = preg_replace_callback('/@import\\s*(?:url\\(\\s*)?[\'"]?(?![a-z]+:)(?!\\/\\/)([^\'"\\()]+)[\'"]?\\s*\\)?\\s*;/', [
    $this,
    'loadNestedFile',
  ], $contents);
  return $contents;
}