Color.inc in Advanced CSS/JS Aggregation 6

File

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

<?php

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

  /**
   * Color Patterns
   *
   * @class Control: Compression Controller
   * @param (array) options: Reference to options array
   * @param (regex) rrgb: Checks for rgb notation
   * @param (regex) rhex: Checks for hex code
   * @param (regex) rfullhex: Checks for full 6 character hex code
   * @static (array) color2hex: Long color name to hex code conversions
   * @static (array) hex2short: Hex code to short color name conversions
   * @static (array) hex2short_safe: CSS Level 1 safe color names that are shorter than hex codes
   * @static (array) files: List of static helpers with their class vars
   */
  private $Control;
  private $options = array();
  private $rrgb = "/^rgb\\((\\d{1,3}\\%?(,\\d{1,3}\\%?,\\d{1,3}\\%?)?)\\)\$/i";
  private $rhex = "/^#([0-9a-f]{3}|[0-9a-f]{6})\$/i";
  private $rfullhex = "/^#([0-9a-f]{6})\$/i";
  private static $color2hex = array();
  private static $hex2short = array();
  private static $hex2short_safe = array();
  private static $files = array(
    'color2hex' => 'long2hex-colors.json',
    'hex2short' => 'hex2short-colors.json',
    'hex2short_safe' => 'hex2short-safe.json',
  );

  /**
   * Stash a reference to the controller on each instantiation
   * and install conversion helpers
   *
   * @param (class) control: CSSCompression Controller
   */
  public function __construct(CSSCompression_Control $control) {
    $this->Control = $control;
    $this->options =& $control->Option->options;
    if (!self::$color2hex) {
      foreach (self::$files as $v => $file) {
        self::${$v} = CSSCompression::getJSON($file);
      }
    }
  }

  /**
   * Central handler for all color conversions.
   *
   * @param (string) val: Color to be parsed
   */
  public function color($val) {

    // Converts rgb values to hex codes
    if ($this->options['color-rgb2hex']) {
      $val = $this
        ->rgb2hex($val);
    }

    // Convert long color names to hex codes
    if ($this->options['color-long2hex']) {
      $val = $this
        ->color2hex($val);
    }

    // Ensure all hex codes are lowercase
    if (preg_match($this->rhex, $val)) {
      $val = strtolower($val);
    }

    // Convert large hex codes to small codes
    if ($this->options['color-hex2shorthex']) {
      $val = $this
        ->hex2short($val);
    }

    // Convert 6 digit hex codes to short color names
    if ($this->options['color-hex2shortcolor']) {
      $val = $this
        ->hex2color($val);
    }

    // Convert safe css level1 color names
    if ($this->options['color-hex2safe']) {
      $val = $this
        ->hex2safe($val);
    }
    return $val;
  }

  /**
   * Converts rgb values to hex codes
   *
   * @param (string) val: Color to be converted
   */
  private function rgb2hex($val) {
    if (!preg_match($this->rrgb, $val, $match)) {
      return $val;
    }

    // locals
    $hex = '0123456789abcdef';
    $str = explode(',', $match[1]);
    $new = '';

    // Incase rgb was defined with single val
    if (!$str) {
      $str = array(
        $match[1],
      );
    }
    foreach ($str as $x) {
      $x = strpos($x, '%') !== false ? intval(intval($x) / 100 * 255) : intval($x);
      if ($x > 255) {
        $x = 255;
      }
      if ($x < 0) {
        $x = 0;
      }
      $new .= $hex[($x - $x % 16) / 16];
      $new .= $hex[$x % 16];
    }

    // Repeat hex code to complete 6 digit hex requirement for single definitions
    if (count($str) == 1) {
      $new .= $new . $new;
    }

    // Replace with hex value
    return "#{$new}";
  }

  /**
   * Convert long color names to hex codes
   *
   * @param (string) val: Color to be converted
   */
  private function color2hex($val) {
    return isset(self::$color2hex[$val]) ? self::$color2hex[$val] : $val;
  }

  /**
   * Convert large hex codes to small codes
   *
   * @param (string) val: Hex to be shortened
   */
  private function hex2short($val) {
    if (!preg_match($this->rfullhex, $val, $match)) {
      return $val;
    }

    // See if we can convert to 3 char hex
    $hex = $match[1];
    if ($hex[0] == $hex[1] && $hex[2] == $hex[3] && $hex[4] == $hex[5]) {
      $val = '#' . $hex[0] . $hex[2] . $hex[4];
    }
    return $val;
  }

  /**
   * Convert large hex codes to small codes
   *
   * @param (string) val: Color to be converted
   */
  private function hex2color($val) {
    return isset(self::$hex2short[$val]) ? self::$hex2short[$val] : $val;
  }

  /**
   * Convert large hex codes to small codes
   *
   * @param (string) val: Color to be converted
   */
  private function hex2safe($val) {
    return isset(self::$hex2short_safe[$val]) ? self::$hex2short_safe[$val] : $val;
  }

  /**
   * 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 Color Class - " . $method);
    }
  }

}

Classes

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