html.php

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<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to [e-mail] so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Pdf
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */


/** Zend_Pdf_Exception */
require_once 'Zend/Pdf/Exception.php';

/** Zend_Pdf_Color */
require_once 'Zend/Pdf/Color.php';

/** Zend_Pdf_Color_Rgb */
require_once 'Zend/Pdf/Color/Rgb.php';

/** Zend_Pdf_GrayScale */
require_once 'Zend/Pdf/Color/GrayScale.php';


/**
 * HTML color implementation
 *
 * Factory class which vends Zend_Pdf_Color objects from typical HTML
 * representations.
 *
 * @category   Zend
 * @package    Zend_Pdf
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Pdf_Color_Html extends Zend_Pdf_Color
{

    /**
     * Color
     *
     * @var Zend_Pdf_Color
     */
    private $_color;

    /**
     * Class constructor.
     *
     * @param mixed $color
     * @throws Zend_Pdf_Exception
     */
    public function __construct($color)
    {
        $this->_color = self::color($color);
    }


    /**
     * Instructions, which can be directly inserted into content stream
     * to switch color.
     * Color set instructions differ for stroking and nonstroking operations.
     *
     * @param boolean $stroking
     * @return string
     */
    public function instructions($stroking)
    {
        return $this->_color->instructions($stroking);
    }

    /**
     * Creates a Zend_Pdf_Color object from the HTML representation.
     *
     * @param string $color May either be a hexidecimal number of the form
     *    #rrggbb or one of the 140 well-known names (black, white, blue, etc.)
     * @return Zend_Pdf_Color
     */
    public static function color($color)
    {
        $pattern = '/^#([A-Fa-f0-9]{2})([A-Fa-f0-9]{2})([A-Fa-f0-9]{2})$/';
        if (preg_match($pattern, $color, $matches)) {
            $r = round((hexdec($matches[1]) / 255), 3);
            $g = round((hexdec($matches[2]) / 255), 3);
            $b = round((hexdec($matches[3]) / 255), 3);
            if (($r == $g) && ($g == $b)) {
                return new Zend_Pdf_Color_GrayScale($r);
            } else {
                return new Zend_Pdf_Color_Rgb($r, $g, $b);
            }
        } else {
            return Zend_Pdf_Color_Html::namedColor($color);
        }
    }

    /**
     * Creates a Zend_Pdf_Color object from the named color.
     *
     * @param string $color One of the 140 well-known color names (black, white,
     *    blue, etc.)
     * @return Zend_Pdf_Color
     */
    public static function namedColor($color)
    {
        switch (strtolower($color)) {
            case 'aqua':
                $r = 0.0;   $g = 1.0;   $b = 1.0;   break;
            case 'black':
                $r = 0.0;   $g = 0.0;   $b = 0.0;   break;
            case 'blue':
                $r = 0.0;   $g = 0.0;   $b = 1.0;   break;
            case 'fuchsia':
                $r = 1.0;   $g = 0.0;   $b = 1.0;   break;
            case 'gray':
                $r = 0.502; $g = 0.502; $b = 0.502; break;
            case 'green':
                $r = 0.0;   $g = 0.502; $b = 0.0;   break;
            case 'lime':
                $r = 0.0;   $g = 1.0;   $b = 0.0;   break;
            case 'maroon':
                $r = 0.502; $g = 0.0;   $b = 0.0;   break;
            case 'navy':
                $r = 0.0;   $g = 0.0;   $b = 0.502; break;
            case 'olive':
                $r = 0.502; $g = 0.502; $b = 0.0;   break;
            case 'purple':
                $r = 0.502; $g = 0.0;   $b = 0.502; break;
            case 'red':
                $r = 1.0;   $g = 0.0;   $b = 0.0;   break;
            case 'silver':
                $r = 0.753; $g = 0.753; $b = 0.753; break;
            case 'teal':
                $r = 0.0;   $g = 0.502; $b = 0.502; break;
            case 'white':
                $r = 1.0;   $g = 1.0;   $b = 1.0;   break;
            case 'yellow':
                $r = 1.0;   $g = 1.0;   $b = 0.0;   break;

            case 'aliceblue':
                $r = 0.941; $g = 0.973; $b = 1.0;   break;
            case 'antiquewhite':
                $r = 0.980; $g = 0.922; $b = 0.843; break;
            case 'aquamarine':
                $r = 0.498; $g = 1.0;   $b = 0.831; break;
            case 'azure':
                $r = 0.941; $g = 1.0;   $b = 1.0;   break;
            case 'beige':
                $r = 0.961; $g = 0.961; $b = 0.863; break;
            case 'bisque':
                $r = 1.0;   $g = 0.894; $b = 0.769; break;
            case 'blanchedalmond':
                $r = 1.0;   $g = 1.0;   $b = 0.804; break;
            case 'blueviolet':
                $r = 0.541; $g = 0.169; $b = 0.886; break;
            case 'brown':
                $r = 0.647; $g = 0.165; $b = 0.165; break;
            case 'burlywood':
                $r = 0.871; $g = 0.722; $b = 0.529; break;
            case 'cadetblue':
                $r = 0.373; $g = 0.620; $b = 0.627; break;
            case 'chartreuse':
                $r = 0.498; $g = 1.0;   $b = 0.0;   break;
            case 'chocolate':
                $r = 0.824; $g = 0.412; $b = 0.118; break;
            case 'coral':
                $r = 1.0;   $g = 0.498; $b = 0.314; break;
            case 'cornflowerblue':
                $r = 0.392; $g = 0.584; $b = 0.929; break;
            case 'cornsilk':
                $r = 1.0;   $g = 0.973; $b = 0.863; break;
            case 'crimson':
                $r = 0.863; $g = 0.078; $b = 0.235; break;
            case 'cyan':
                $r = 0.0;   $g = 1.0;   $b = 1.0;   break;
            case 'darkblue':
                $r = 0.0;   $g = 0.0;   $b = 0.545; break;
            case 'darkcyan':
                $r = 0.0;   $g = 0.545; $b = 0.545; break;
            case 'darkgoldenrod':
                $r = 0.722; $g = 0.525; $b = 0.043; break;
            case 'darkgray':
                $r = 0.663; $g = 0.663; $b = 0.663; break;
            case 'darkgreen':
                $r = 0.0;   $g = 0.392; $b = 0.0;   break;
            case 'darkkhaki':
                $r = 0.741; $g = 0.718; $b = 0.420; break;
            case 'darkmagenta':
                $r = 0.545; $g = 0.0;   $b = 0.545; break;
            case 'darkolivegreen':
                $r = 0.333; $g = 0.420; $b = 0.184; break;
            case 'darkorange':
                $r = 1.0;   $g = 0.549; $b = 0.0;   break;
            case 'darkorchid':
                $r = 0.6;   $g = 0.196; $b = 0.8;   break;
            case 'darkred':