Setup.inc in Advanced CSS/JS Aggregation 6

File

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

<?php

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

  /**
   * Trim Patterns
   *
   * @class Control: Compression Controller
   * @class Individuals: Individuals Instance
   * @instance instance: CSSCompression Instance
   * @param (string) token: Copy of the injection token
   * @param (array) options: Reference to options
   * @param (array) stats: Reference to stats
   * @param (regex) rsemicolon: Checks for semicolon without an escape '\' character before it
   * @param (regex) rcolon: Checks for colon without an escape '\' character before it
   * @param (regex) rbang: Checks for '!' without an escape '\' character before it
   * @param (regex) rspacebank: Checks for an unescaped space before a bang character
   * @param (regex) rliner: Matching known 1-line intros
   * @param (regex) rnested: Matching known subsection handlers
   * @param (regex) rurl: url wrapper matching
   * @param (regex) rsinglequote: Checks for unescaped escaped single quote (mouthfull)
   * @param (array) rsetup: Expanding stylesheet for semi-tokenizing
   */
  private $Control;
  private $Individuals;
  private $instance;
  private $token = '';
  private $options = array();
  private $stats = array();
  private $rsemicolon = "/(?<!\\\\);/";
  private $rcolon = "/(?<!\\\\):/";
  private $rbang = "/(?<!\\\\)\\!/";
  private $rspacebang = "/(?<!\\\\)\\s\\!/";
  private $rliner = "/^@(import|charset|namespace)/i";
  private $rmedia = "/^@media/i";
  private $rurl = "/url\\((.*?)\\)/";
  private $rsinglequote = "/(?<!\\\\)\\\\'/";
  private $rsetup = array(
    'patterns' => array(
      "/(?<!\\\\){/",
      "/(?<!\\\\)}/",
      "/(?<!\\\\)@/",
      "/(@(charset|import)[^;]*(?<!\\\\);)/",
    ),
    'replacements' => array(
      "\n{\n",
      "\n}\n",
      "\n@",
      "\$1\n",
    ),
  );

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

  /**
   * Setup selector and details arrays for compression methods
   *
   * @param (string) css: Trimed stylesheet
   */
  public function setup($css) {

    // Seperate the element from the elements details
    $css = explode("\n", preg_replace($this->rsetup['patterns'], $this->rsetup['replacements'], $css));
    $newline = $this->options['readability'] > CSSCompression::READ_NONE ? "\n" : '';
    $setup = array(
      'selectors' => array(),
      'details' => array(),
      'unknown' => array(),
      'introliner' => '',
      'namespace' => '',
      'import' => '',
      'charset' => '',
    );
    while (count($css)) {
      $row = trim(array_shift($css));
      if ($row == '') {
        continue;
      }
      else {
        if ($row[0] == '@' && $css[0] == '{' && trim($css[1]) != '' && $css[2] == '}') {

          // Stash selector
          array_push($setup['selectors'], $row);

          // Stash details (after the opening brace)
          array_push($setup['details'], $this
            ->details(trim($css[1])));

          // drop the details from the stack
          $css = array_slice($css, 3);
        }
        else {
          if (preg_match($this->rliner, $row, $match)) {
            $setup[$match[1]] .= $this
              ->liner($row) . $newline;
          }
          else {
            if ($row[0] == '@' && $css[0] == '{') {

              // Stash atrule as selector
              array_push($setup['selectors'], $this->token . $row);

              // Stash details (after the opening brace)
              array_push($setup['details'], $this
                ->nested($css, preg_match($this->rmedia, $row)) . $newline);
            }
            else {
              if ($row[0] == '@' && substr($row, -1) == ';') {
                $setup['introliner'] .= $row . $newline;
              }
              else {
                if (count($css) >= 3 && $css[0] == '{' && $css[2] == '}') {

                  // Stash selector
                  array_push($setup['selectors'], $row);

                  // Stash details (after the opening brace)
                  array_push($setup['details'], $this
                    ->details(trim($css[1])));

                  // drop the details from the stack
                  $css = array_slice($css, 3);
                }
                else {

                  // Still add to unknown stack, for notification
                  array_push($setup['unknown'], $row);

                  // Stash unknown artifacts as selectors with a token
                  array_push($setup['selectors'], $this->token . $row);

                  // Give it an empty rule set
                  array_push($setup['details'], '');
                }
              }
            }
          }
        }
      }
    }
    return $setup;
  }

  /**
   * Run nested elements through a separate instance of compression
   *
   * @param (array) css: Reference to the original css array
   * @param (bool) organize: Whether or not to organize the subsection (only true for media sections)
   */
  private function nested(&$css = array(), $organize = false) {
    $options = $this->options;
    $left = 0;
    $right = 0;
    $row = '';
    $independent = '';
    $content = '';
    $spacing = '';
    $newline = $this->options['readability'] > CSSCompression::READ_NONE ? "\n" : '';

    // Find the end of the nested section
    while (count($css) && ($left < 1 || $left > $right)) {
      $row = trim(array_shift($css));
      if ($row == '') {
        continue;
      }
      else {
        if ($row == '{') {
          $left++;
        }
        else {
          if ($row == '}') {
            $right++;
          }
          else {
            if (count($css) && substr($row, 0, 1) != '@' && substr($css[0], 0, 1) == '@' && substr($row, -1) == ';') {
              $independent .= $row;
              continue;
            }
          }
        }
      }
      $content .= $row;
    }

    // Ensure copy of instance exists
    if (!$this->instance) {
      $this->instance = new CSSCompression();
    }

    // Fresh start
    $this->instance
      ->reset();

    // Compress the nested section independently after removing the wrapping braces
    // Also make sure to only organize media sections
    if ($options['organize'] == true && $organize == false) {
      $options['organize'] = false;
    }

    // Independent sections should be prepended to the next compressed section
    $content = ($independent == '' ? '' : $independent . $newline) . $this->instance
      ->compress(substr($content, 1, -1), $options);

    // Formatting for anything higher then 0 readability
    if ($newline == "\n") {
      $content = "\n\t" . str_replace("\n", "\n\t", $content) . "\n";
      $spacing = $this->options['readability'] > CSSCompression::READ_MIN ? ' ' : '';
    }

    // Stash the compressed nested script
    return "{$spacing}{" . $content . "}{$newline}";
  }

  /**
   * Converts import/namespace urls into strings
   *
   * @param (string) row: At-rule
   */
  private function liner($row) {
    $pos = 0;
    while (preg_match($this->rurl, $row, $match, PREG_OFFSET_CAPTURE, $pos)) {
      $quote = preg_match($this->rsinglequote, $match[1][0]) ? '"' : "'";
      $replace = $quote . $match[1][0] . $quote;
      $row = substr_replace($row, $replace, $match[0][1], strlen($match[0][0]));
      $pos = $match[0][1] + strlen($replace);
    }
    return $row;
  }

  /**
   * Run individual compression techniques on each property of a selector
   *
   * @param (string) row: Selector properties
   */
  private function details($row) {
    $row = preg_split($this->rsemicolon, $row);
    $parts = array();
    $details = '';
    foreach ($row as $line) {

      // Set loopers
      $parts = preg_split($this->rcolon, $line, 2);
      $prop = '';
      $value = '';

      // Property
      if (isset($parts[0]) && ($parts[0] = trim($parts[0])) != '') {
        $prop = $parts[0];
      }

      // Value
      if (isset($parts[1]) && ($parts[1] = trim($parts[1])) != '') {
        $value = preg_replace($this->rbang, ' !', $parts[1]);
      }

      // Fail safe, remove unspecified property/values
      if ($prop == '' || $value == '') {
        continue;
      }

      // Run the tag/element through each compression
      list($prop, $value) = $this->Individuals
        ->individuals($prop, $value);

      // Add counter to before stats
      $this->stats['before']['props']++;

      // Store the compressed element
      $details .= "{$prop}:" . preg_replace($this->rspacebang, '!', $value) . ";";
    }
    return $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 Setup Class - " . $method);
    }
  }

}

Classes

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