Cleanup.inc in Advanced CSS/JS Aggregation 6

File

advagg_css_compress/css-compressor-3.x/src/lib/Cleanup.inc

<?php

/**
 * CSS Compressor [VERSION]
 * [DATE]
 * Corey Hart @ http://www.codenothing.com
 */
class CSSCompression_Cleanup {

  /**
   * Cleanup patterns
   *
   * @class Control: Compression Controller
   * @param (string) token: Copy of the injection token
   * @param (regex) rtoken: Token regex built upon instantiation
   * @param (array) options: Reference to options
   * @param (regex) rsemi: Checks for last semit colon in details
   * @param (regex) rsemicolon: Checks for semicolon without an escape '\' character before it
   * @param (regex) rspace: Checks for space without an escape '\' character before it
   * @param (regex) rcolon: Checks for colon without an escape '\' character before it
   * @param (regex) rquote: Checks for quote (') without an escape '\' character before it
   * @param (array) rescape: Array of patterns for groupings that should be escaped
   * @param (array) escaped: Contains patterns and replacements for espaced characters
   */
  private $Control;
  private $token = '';
  private $rtoken = '';
  private $options = array();
  private $rsemi = "/;\$/";
  private $rsemicolon = "/(?<!\\\\);/";
  private $rspace = "/(?<!\\\\)\\s/";
  private $rcolon = "/(?<!\\\\):/";
  private $rquote = "/(?<!\\\\)'/";
  private $rescape = array(
    "/((?<!\\\\)\")(.*?)((?<!\\\\)\")/",
    "/((?<!\\\\)')(.*?)((?<!\\\\)')/",
    "/(url\\()(.*?)(\\))/",
  );
  private $escaped = array(
    'search' => array(
      "\\:",
      "\\;",
      "\\}",
      "\\{",
      "\\@",
      "\\!",
      "\\,",
      "\\>",
      "\\+",
      "\\~",
      "\\/",
      "\\*",
      "\\.",
      "\\=",
      "\\#",
      "\\r",
      "\\n",
      "\\t",
      "\\ ",
    ),
    'replace' => array(
      ":",
      ";",
      "}",
      "{",
      "@",
      "!",
      ",",
      ">",
      "+",
      "~",
      "/",
      "*",
      ".",
      "=",
      "#",
      "\r",
      "\n",
      "\t",
      " ",
    ),
  );

  /**
   * Build the token regex based on defined token
   *
   * @param (class) control: CSSCompression Controller
   */
  public function __construct(CSSCompression_Control $control) {
    $this->Control = $control;
    $this->token = CSSCompression::TOKEN;
    $this->options =& $control->Option->options;

    // Have to build the token regexs after initialization
    $this->rtoken = "/({$this->token})(.*?)({$this->token})/";
    array_push($this->rescape, $this->rtoken);
  }

  /**
   * Central cleanup process, removes all injections
   *
   * @param (array) selectors: Array of selectors
   * @param (array) details: Array of details
   */
  public function cleanup(&$selectors, &$details) {
    foreach ($details as $i => &$value) {

      // Auto skip sections
      if (isset($selectors[$i]) && strpos($selectors[$i], $this->token) === 0) {
        continue;
      }

      // Removing dupes
      if ($this->options['rm-multi-define']) {
        $value = $this
          ->removeMultipleDefinitions($value);
      }
      $value = $this
        ->removeUnnecessarySemicolon($value);
    }
    return array(
      $selectors,
      $details,
    );
  }

  /**
   * Removes '\' from possible splitter characters in URLs
   *
   * @param (string) css: Full css sheet
   */
  public function removeInjections($css) {

    // Remove escaped characters
    foreach ($this->rescape as $regex) {
      $pos = 0;
      while (preg_match($regex, $css, $match, PREG_OFFSET_CAPTURE, $pos)) {
        $value = $match[1][0] . str_replace($this->escaped['search'], $this->escaped['replace'], $match[2][0]) . $match[3][0];
        $css = substr_replace($css, $value, $match[0][1], strlen($match[0][0]));
        $pos = $match[0][1] + strlen($value) + 1;
      }
    }

    // Remove token injections
    $pos = 0;
    while (preg_match($this->rtoken, $css, $match, PREG_OFFSET_CAPTURE, $pos)) {
      $value = $match[2][0];
      $id = substr($css, $match[0][1] - 4, 4) == '[id=' ? true : false;
      $class = substr($css, $match[0][1] - 7, 7) == '[class=' ? true : false;
      if (preg_match($this->rspace, $value) || !$id && !$class) {
        $quote = preg_match($this->rquote, $value) ? "\"" : "'";
        $value = "{$quote}{$value}{$quote}";
        $css = substr_replace($css, $value, $match[0][1], strlen($match[0][0]));
        $pos = $match[0][1] + strlen($value) + 1;
      }
      else {
        $css = substr_replace($css, $value, $match[0][1], strlen($match[0][0]));
        $pos = $match[0][1] + strlen($value) + 1;
      }
    }
    return $css;
  }

  /**
   * Removes multiple definitions that were created during compression
   *
   * @param (string) val: CSS Selector Properties
   */
  private function removeMultipleDefinitions($val = '') {
    $storage = array();
    $arr = preg_split($this->rsemicolon, $val);
    foreach ($arr as $x) {
      if ($x) {
        list($a, $b) = preg_split($this->rcolon, $x, 2);
        $storage[$a] = $b;
      }
    }
    if ($storage) {
      $val = '';
      foreach ($storage as $x => $y) {
        $val .= "{$x}:{$y};";
      }
    }

    // Return converted val
    return $val;
  }

  /**
   * Removes last semicolons on the final property of a set
   *
   * @param (string) value: rule set
   */
  private function removeUnnecessarySemicolon($value) {
    return preg_replace($this->rsemi, '', $value);
  }

  /**
   * Access to private methods for testing
   *
   * @param (string) method: Method to be called
   * @param (array) args: Array of paramters to be passed in
   */
  public function access($method, $args) {
    if (method_exists($this, $method)) {
      if ($method == 'cleanup') {
        return $this
          ->cleanup($args[0], $args[1]);
      }
      else {
        return call_user_func_array(array(
          $this,
          $method,
        ), $args);
      }
    }
    else {
      throw new CSSCompression_Exception("Unknown method in Cleanup Class - " . $method);
    }
  }

}

Classes

Name	Description
CSSCompression_Cleanup	CSS Compressor [VERSION] [DATE] Corey Hart @ http://www.codenothing.com