style.cls.php

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      $b = 0x80;
      break;

    case "fuchsia":
      $r = 0xff;
      $b = 0xff;
      break;

    case "white":
      $r = $g = $b = 0xff;
      break;

    case "lime":
      $g = 0xff;
      break;

    case "green":
      $g = 0x80;
      break;

    case "navy":
      $b = 0x80;
      break;

    case "blue":
      $b = 0xff;
      break;

    case "aqua":
      $g = 0xff;
      $b = 0xff;
      break;

    case "teal":
      $g = 0x80;
      $b = 0x80;
      break;

    case "black":
      break;

    case "sliver":
      $r = $g = $b = 0xc0;
      break;

    case "gray":
    case "grey":
      $r = $g = $b = 0x80;
      break;

    case "transparent":
      return "transparent";
      
    default:

      if ( mb_strlen($colour) == 4 && $colour{0} == "#" ) {
        // #rgb format
        $r = hexdec($colour{1} . $colour{1});
        $g = hexdec($colour{2} . $colour{2});
        $b = hexdec($colour{3} . $colour{3});

      } else if ( mb_strlen($colour) == 7 && $colour{0} == "#" ) {
        // #rrggbb format
        $r = hexdec(mb_substr($colour, 1, 2));
        $g = hexdec(mb_substr($colour, 3, 2));
        $b = hexdec(mb_substr($colour, 5, 2));

      } else if ( mb_strpos($colour, "rgb") !== false ) {

        // rgb( r,g,b ) format
        $i = mb_strpos($colour, "(");
        $j = mb_strpos($colour, ")");
        
        // Bad colour value
        if ($i === false || $j === false)
          return null;

        $triplet = explode(",", mb_substr($colour, $i+1, $j-$i-1));

        if (count($triplet) != 3)
          return null;
        
        foreach (array_keys($triplet) as $c) {
          $triplet[$c] = trim($triplet[$c]);
          
          if ( $triplet[$c]{mb_strlen($triplet[$c]) - 1} == "%" ) 
            $triplet[$c] = round($triplet[$c] * 0.255);
        }

        list($r, $g, $b) = $triplet;

      } else {
        // Who knows?
        return null;
      }
      
      // Clip to 0 - 1
      $r = $r < 0 ? 0 : ($r > 255 ? 255 : $r);
      $g = $g < 0 ? 0 : ($g > 255 ? 255 : $g);
      $b = $b < 0 ? 0 : ($b > 255 ? 255 : $b);
      break;
      
    }
    
    // Form array
    $arr = array(0 => $r / 0xff, 1 => $g / 0xff, 2 => $b / 0xff,
                 "r"=>$r / 0xff, "g"=>$g / 0xff, "b"=>$b / 0xff,
                 "hex" => sprintf("#%02X%02X%02X", $r, $g, $b));
    return $arr;
      
  }

  
  /**
   * Alias for {@link Style::munge_colour()}
   *
   * @param string $color
   * @return array
   */
  function munge_color($color) { return $this->munge_colour($color); }  
  

  /**
   * PHP5 overloaded setter
   *
   * This function along with {@link Style::__get()} permit a user of the
   * Style class to access any (CSS) property using the following syntax:
   * <code>
   *  Style->margin_top = "1em";
   *  echo (Style->margin_top);
   * </code>
   *
   * __set() automatically calls the provided set function, if one exists,
   * otherwise it sets the property directly.  Typically, __set() is not
   * called directly from outside of this class.
   *
   * @param string $prop  the property to set
   * @param mixed  $val   the value of the property
   * 
   */
  function __set($prop, $val) {
    global $_dompdf_warnings;

    $prop = str_replace("-", "_", $prop);
    $this->_prop_cache[$prop] = null;
    
    if ( !isset(self::$_defaults[$prop]) ) {
      $_dompdf_warnings[] = "'$prop' is not a valid CSS2 property.";
      return;
    }
    
    if ( $prop !== "content" && is_string($val) && mb_strpos($val, "url") === false ) {
      $val = mb_strtolower(trim(str_replace(array("\n", "\t"), array(" "), $val)));
      $val = preg_replace("/([0-9]+) (pt|px|pc|em|ex|in|cm|mm|%)/S", "\\1\\2", $val);
    }
    
    $method = "set_$prop";

    if ( method_exists($this, $method) )
      $this->$method($val);
    else 
      $this->_props[$prop] = $val;
    
  }

  /**
   * PHP5 overloaded getter
   *
   * Along with {@link Style::__set()} __get() provides access to all CSS
   * properties directly.  Typically __get() is not called directly outside
   * of this class.
   *
   * @param string $prop
   * @return mixed
   */
  function __get($prop) {
    
    if ( !isset(self::$_defaults[$prop]) ) 
      throw new DOMPDF_Exception("'$prop' is not a valid CSS2 property.");

    if ( isset($this->_prop_cache[$prop]) )
      return $this->_prop_cache[$prop];
    
    $method = "get_$prop";

    // Fall back on defaults if property is not set
    if ( !isset($this->_props[$prop]) )
      $this->_props[$prop] = self::$_defaults[$prop];

    if ( method_exists($this, $method) )
      return $this->_prop_cache[$prop] = $this->$method();


    return $this->_prop_cache[$prop] = $this->_props[$prop];
  }


  /**
   * Getter for the 'font-family' CSS property.
   *
   * Uses the {@link Font_Metrics} class to resolve the font family into an
   * actual font file.
   *
   * @link http://www.w3.org/TR/CSS21/fonts.html#propdef-font-family
   * @return string
   */
  function get_font_family() {
    // Select the appropriate font.  First determine the subtype, then check
    // the specified font-families for a candidate.

    // Resolve font-weight
    $weight = $this->__get("font_weight");
    
    if ( is_numeric($weight) ) {

      if ( $weight < 700 )
        $weight = "normal";
      else
        $weight = "bold";

    } else if ( $weight == "bold" || $weight == "bolder" ) {
      $weight = "bold";

    } else {
      $weight = "normal";

    }

    // Resolve font-style
    $font_style = $this->__get("font_style");

    if ( $weight == "bold" && $font_style == "italic" )
      $subtype = "bold_italic";
    else if ( $weight == "bold" && $font_style != "italic" )
      $subtype = "bold";
    else if ( $weight != "bold" && $font_style == "italic" )
      $subtype = "italic";
    else
      $subtype = "normal";
    
    // Resolve the font family
    $families = explode(",", $this->_props["font_family"]);
    reset($families);
    $font = null;
    while ( current($families) ) {
      list(,$family) = each($families);
      $font = Font_Metrics::get_font($family, $subtype);

      if ( $font )
        return $font;
    }
    throw new DOMPDF_Exception("Unable to find a suitable font replacement for: '" . $this->_props["font_family"] ."'");
    
  }

  /**
   * Returns the resolved font size, in points
   *
   * @link http://www.w3.org/TR/CSS21/fonts.html#propdef-font-size   
   * @return float
   */
  function get_font_size() {

    if ( $this->__font_size_calculated )
      return $this->_props["font_size"];
    
    if ( !isset($this->_props["font_size"]) )
      $fs = self::$_defaults["font_size"];
    else 
      $fs = $this->_props["font_size"];
    
    if ( !isset($this->_parent_font_size) )
      $this->_parent_font_size = self::$default_font_size;
    
    switch ($fs) {
      
    case "xx-small":
      $fs = 3/5 * $this->_parent_font_size;
      break;

    case "x-small":
      $fs = 3/4 * $this->_parent_font_size;
      break;

    case "smaller":
    case "small":
      $fs = 8/9 * $this->_parent_font_size;
      break;

    case "medium":
      $fs = $this->_parent_font_size;
      break;

    case "larger":
    case "large":
      $fs = 6/5 * $this->_parent_font_size;
      break;

    case "x-large":
      $fs = 3/2 * $this->_parent_font_size;
      break;

    case "xx-large":
      $fs = 2/1 * $this->_parent_font_size;
      break;

    default:
      break;
    }

    // Ensure relative sizes resolve to something
    if ( ($i = mb_strpos($fs, "em")) !== false ) 
      $fs = mb_substr($fs, 0, $i) * $this->_parent_font_size;

    else if ( ($i = mb_strpos($fs, "ex")) !== false ) 
      $fs = mb_substr($fs, 0, $i) * $this->_parent_font_size;

    else
      $fs = $this->length_in_pt($fs);

    $this->_props["font_size"] = $fs;    
    $this->__font_size_calculated = true;
    return $this->_props["font_size"];

  }

  /**
   * @link http://www.w3.org/TR/CSS21/text.html#propdef-word-spacing
   * @return float
   */
  function get_word_spacing() {
    if ( $this->_props["word_spacing"] === "normal" )
      return 0;

    return $this->_props["word_spacing"];
  }

  /**
   * @link http://www.w3.org/TR/CSS21/visudet.html#propdef-line-height
   * @return float
   */
  function get_line_height() {
    if ( $this->_props["line_height"] === "normal" )
      return self::$default_line_height * $this->get_font_size();

    if ( is_numeric($this->_props["line_height"]) ) 
      return $this->length_in_pt( $this->_props["line_height"] . "%", $this->get_font_size());
    
    return $this->length_in_pt( $this->_props["line_height"], $this->get_font_size() );
  }

  /**
   * Returns the colour as an array
   *
   * The array has the following format:
   * <code>array(r,g,b, "r" => r, "g" => g, "b" => b, "hex" => "#rrggbb")</code>
   *
   * @link http://www.w3.org/TR/CSS21/colors.html#propdef-color
   * @return array
   */
  function get_color() {
    return $this->munge_color( $this->_props["color"] );
  }

  /**
   * Returns the background colour as an array
   *
   * The returned array has the same format as {@link Style::get_color()}
   *
   * @link http://www.w3.org/TR/CSS21/colors.html#propdef-background-color
   * @return array
   */
  function get_background_color() {
    return $this->munge_color( $this->_props["background_color"] );
  }
  
  /**
   * Returns the background position as an array
   *
   * The returned array has the following format:
   * <code>array(x,y, "x" => x, "y" => y)</code>
   *
   * @link http://www.w3.org/TR/CSS21/colors.html#propdef-background-position
   * @return array
   */
  function get_background_position() {
    
    $tmp = explode(" ", $this->_props["background_position"]);

    switch ($tmp[0]) {

    case "left":
      $x = "0%";
      break;

    case "right":
      $x = "100%";
      break;

    case "top":
      $y = "0%";
      break;

    case "bottom":
      $y = "100%";
      break;

    case "center":
      $x = "50%";
      $y = "50%";
      break;

    default:
      $x = $tmp[0];
      break;
    }

    if ( isset($tmp[1]) ) {

      switch ($tmp[1]) {
      case "left":
        $x = "0%";
        break;
        
      case "right":
        $x = "100%";
        break;
        
      case "top":
        $y = "0%";
        break;
        
      case "bottom":
        $y = "100%";
        break;
        
      case "center":
        if ( $tmp[0] == "left" || $tmp[0] == "right" || $tmp[0] == "center" )
          $y = "50%";
        else
          $x = "50%";
        break;
        
      default:
        $y = $tmp[1];
        break;
      }

    } else {
      $y = "50%";
    }

    if ( !isset($x) )
      $x = "0%";

    if ( !isset($y) )
      $y = "0%";

    return array( 0 => $x, "x" => $x,
                  1 => $y, "y" => $y );
  }
           
        
  /**#@+
   * Returns the border colour as an array
   *
   * See {@link Style::get_color()}
   *
   * @link http://www.w3.org/TR/CSS21/box.html#border-color-properties
   * @return array
   */
  function get_border_top_color() {
    if ( $this->_props["border_top_color"] === "" )
      $this->_props["border_top_color"] = $this->__get("color");    
    return $this->munge_color($this->_props["border_top_color"]);
  }

  function get_border_right_color() {
    if ( $this->_props["border_right_color"] === "" )
      $this->_props["border_right_color"] = $this->__get("color");
    return $this->munge_color($this->_props["border_right_color"]);
  }

  function get_border_bottom_color() {
    if ( $this->_props["border_bottom_color"] === "" )
      $this->_props["border_bottom_color"] = $this->__get("color");
    return $this->munge_color($this->_props["border_bottom_color"]);;
  }

  function get_border_left_color() {
    if ( $this->_props["border_left_color"] === "" )
      $this->_props["border_left_color"] = $this->__get("color");
    return $this->munge_color($this->_props["border_left_color"]);
  }
  
  /**#@-*/

 /**#@+
   * Returns the border width, as it is currently stored
   *
   * @link http://www.w3.org/TR/CSS21/box.html#border-width-properties
   * @return float|string   
   */
  function get_border_top_width() {
    $style = $this->__get("border_top_style");
    return $style !== "none" && $style !== "hidden" ? $this->length_in_pt($this->_props["border_top_width"]) : 0;
  }
  
  function get_border_right_width() {
    $style = $this->__get("border_right_style");    
    return $style !== "none" && $style !== "hidden" ? $this->length_in_pt($this->_props["border_right_width"]) : 0;
  }

  function get_border_bottom_width() {
    $style = $this->__get("border_bottom_style");
    return $style !== "none" && $style !== "hidden" ? $this->length_in_pt($this->_props["border_bottom_width"]) : 0;
  }

  function get_border_left_width() {
    $style = $this->__get("border_left_style");
    return $style !== "none" && $style !== "hidden" ? $this->length_in_pt($this->_props["border_left_width"]) : 0;
  }
  /**#@-*/

  /**
   * Return an array of all border properties.
   *
   * The returned array has the following structure:
   * <code>
   * array("top" => array("width" => [border-width],
   *                      "style" => [border-style],
   *                      "color" => [border-color (array)]),
   *       "bottom" ... )
   * </code>
   *
   * @return array
   */
  function get_border_properties() {
    return array("top" => array("width" => $this->__get("border_top_width"),
                                "style" => $this->__get("border_top_style"),
                                "color" => $this->__get("border_top_color")),