Organize.inc in Advanced CSS/JS Aggregation 6

File

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

<?php

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

  /**
   * Organize Patterns
   *
   * @class Control: Compression Controller
   * @param (array) options: Reference to options
   * @param (regex) rsemicolon: Checks for semicolon without an escape '\' character before it
   * @param (regex) rlastsemi: Checks for semicolon at the end of the string
   */
  private $Control;
  private $options = array();
  private $rsemicolon = "/(?<!\\\\);/";
  private $rlastsemi = "/(?<!\\\\);\$/";

  /**
   * Stash a reference to the controller on each instantiation
   *
   * @param (class) control: CSSCompression Controller
   */
  public function __construct(CSSCompression_Control $control) {
    $this->Control = $control;
    $this->options =& $control->Option->options;
  }

  /**
   * Look to see if we can combine selectors to reduce the number
   * of definitions.
   *
   * @param (array) selectors: Array of selectors, map directly to details
   * @param (array) details: Array of rule sets, map directly to selectors
   */
  public function organize(&$selectors = array(), &$details = array()) {

    // Combining defns based on similar selectors
    list($selectors, $details) = $this
      ->reduceSelectors($selectors, $details);

    // Combining defns based on similar details
    list($selectors, $details) = $this
      ->reduceDetails($selectors, $details);

    // Return in package form
    return array(
      $selectors,
      $details,
    );
  }

  /**
   * Combines multiply defined selectors by merging the rule sets,
   * latter declarations overide declaratins at top of file
   *
   * @param (array) selectors: Array of selectors broken down by setup
   * @param (array) details: Array of rule sets broken down by setup
   */
  private function reduceSelectors($selectors, $details) {
    $keys = array_keys($selectors);
    $max = array_pop($keys) + 1;
    for ($i = 0; $i < $max; $i++) {
      if (!isset($selectors[$i])) {
        continue;
      }
      for ($k = $i + 1; $k < $max; $k++) {
        if (!isset($selectors[$k])) {
          continue;
        }
        if ($selectors[$i] == $selectors[$k]) {

          // Prevent noticies
          if (!isset($details[$i])) {
            $details[$i] = '';
          }
          if (!isset($details[$k])) {
            $details[$k] = '';
          }

          // We kill the last semicolon before organization, so account for that.
          if ($details[$i] != '' && $details[$k] != '' && !preg_match($this->rlastsemi, $details[$i])) {
            $details[$i] .= ';' . $details[$k];
          }
          else {
            $details[$i] .= $details[$k];
          }

          // Remove the second part
          unset($selectors[$k], $details[$k]);
        }
      }
    }
    return array(
      $selectors,
      $details,
    );
  }

  /**
   * Combines multiply defined rule sets by merging the selectors
   * in comma seperated format
   *
   * @param (array) selectors: Array of selectors broken down by setup
   * @param (array) details: Array of rule sets broken down by setup
   */
  private function reduceDetails($selectors, $details) {
    $keys = array_keys($selectors);
    $max = array_pop($keys) + 1;
    for ($i = 0; $i < $max; $i++) {
      if (!isset($selectors[$i])) {
        continue;
      }
      $arr = preg_split($this->rsemicolon, isset($details[$i]) ? $details[$i] : '');
      for ($k = $i + 1; $k < $max; $k++) {
        if (!isset($selectors[$k])) {
          continue;
        }
        $match = preg_split($this->rsemicolon, isset($details[$k]) ? $details[$k] : '');
        $x = array_diff($arr, $match);
        $y = array_diff($match, $arr);
        if (count($x) < 1 && count($y) < 1) {
          $selectors[$i] .= ',' . $selectors[$k];
          unset($details[$k], $selectors[$k]);
        }
      }
    }
    return array(
      $selectors,
      $details,
    );
  }

  /**
   * 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)) {
      return call_user_func_array(array(
        $this,
        $method,
      ), $args);
    }
    else {
      throw new CSSCompression_Exception("Unknown method in Organize Class - " . $method);
    }
  }

}

Classes

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