<?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 license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Barcode

 * @subpackage Renderer

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Image.php 20366 2010-01-18 03:56:52Z ralph $

 */

/** @see Zend_Barcode_Renderer_RendererAbstract*/

require_once 'Zend/Barcode/Renderer/RendererAbstract.php';

/**

 * Class for rendering the barcode as svg

 *

 * @category   Zend

 * @package    Zend_Barcode

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Barcode_Renderer_Svg extends Zend_Barcode_Renderer_RendererAbstract

{

    /**

     * Resource for the image

     * @var DOMDocument

     */

    protected $_resource = null;

    /**

     * Root element of the XML structure

     * @var DOMElement

     */

    protected $_rootElement = null;

    /**

     * Height of the rendered image wanted by user

     * @var integer

     */

    protected $_userHeight = 0;

    /**

     * Width of the rendered image wanted by user

     * @var integer

     */

    protected $_userWidth = 0;

    /**

     * Set height of the result image

     * @param null|integer $value

     * @return Zend_Image_Barcode_Abstract

     * @throw Zend_Image_Barcode_Exception

     */

    public function setHeight($value)

    {

        if (!is_numeric($value) || intval($value) < 0) {

            require_once 'Zend/Barcode/Renderer/Exception.php';

            throw new Zend_Barcode_Renderer_Exception(

                'Svg height must be greater than or equals 0'

            );

        }

        $this->_userHeight = intval($value);

        return $this;

    }

    /**

     * Get barcode height

     *

     * @return int

     */

    public function getHeight()

    {

        return $this->_userHeight;

    }

    /**

     * Set barcode width

     *

     * @param mixed $value

     * @return void

     */

    public function setWidth($value)

    {

        if (!is_numeric($value) || intval($value) < 0) {

            require_once 'Zend/Barcode/Renderer/Exception.php';

            throw new Zend_Barcode_Renderer_Exception(

                'Svg width must be greater than or equals 0'

            );

        }

        $this->_userWidth = intval($value);

        return $this;

    }

    /**

     * Get barcode width

     *

     * @return int

     */

    public function getWidth()

    {

        return $this->_userWidth;

    }

    /**

     * Set an image resource to draw the barcode inside

     *

     * @param DOMDocument $value

     * @return Zend_Barcode_Renderer

     * @throw Zend_Barcode_Renderer_Exception

     */

    public function setResource($svg)

    {

        if (!$svg instanceof DOMDocument) {

            require_once 'Zend/Barcode/Renderer/Exception.php';

            throw new Zend_Barcode_Renderer_Exception(

                'Invalid DOMDocument resource provided to setResource()'

            );

        }

        $this->_resource = $svg;

        return $this;

    }

    /**

     * Initialize the image resource

     *

     * @return void

     */

    protected function _initRenderer()

    {

        $barcodeWidth  = $this->_barcode->getWidth(true);

        $barcodeHeight = $this->_barcode->getHeight(true);

        $backgroundColor = $this->_barcode->getBackgroundColor();

        $imageBackgroundColor = 'rgb(' . implode(', ', array(($backgroundColor & 0xFF0000) >> 16,

                                                             ($backgroundColor & 0x00FF00) >> 8,

                                                             ($backgroundColor & 0x0000FF))) . ')';

        $width = $barcodeWidth;

        $height = $barcodeHeight;

        if ($this->_userWidth && $this->_barcode->getType() != 'error') {

            $width = $this->_userWidth;

        }

        if ($this->_userHeight && $this->_barcode->getType() != 'error') {

            $height = $this->_userHeight;

        }

        if ($this->_resource === null) {

            $this->_resource = new DOMDocument('1.0', 'utf-8');

            $this->_resource->formatOutput = true;

            $this->_rootElement = $this->_resource->createElement('svg');

            $this->_rootElement->setAttribute('xmlns', "http://www.w3.org/2000/svg");

            $this->_rootElement->setAttribute('version', '1.1');

            $this->_rootElement->setAttribute('width', $width);

            $this->_rootElement->setAttribute('height', $height);

            $this->_appendRootElement('title',

                                      array(),

                                      "Barcode " . strtoupper($this->_barcode->getType()) . " " . $this->_barcode->getText());

        } else {

            $this->_readRootElement();

            $width = $this->_rootElement->getAttribute('width');

            $height = $this->_rootElement->getAttribute('height');

        }

        $this->_adjustPosition($height, $width);

        $this->_appendRootElement('rect',

                          array('x' => $this->_leftOffset,

                                'y' => $this->_topOffset,

                                'width' => ($this->_leftOffset + $barcodeWidth - 1),

                                'height' => ($this->_topOffset + $barcodeHeight - 1),

                                'fill' => $imageBackgroundColor));

    }

    protected function _readRootElement()

    {

        if ($this->_resource !== null) {

            $this->_rootElement = $this->_resource->documentElement;

        }

    }

    /**

     * Append a new DOMElement to the root element

     *

     * @param string $tagName

     * @param array $attributes

     * @param string $textContent

     */

    protected function _appendRootElement($tagName, $attributes = array(), $textContent = null)

    {

        $newElement = $this->_createElement($tagName, $attributes, $textContent);

        $this->_rootElement->appendChild($newElement);

    }

    /**

     * Create DOMElement

     *

     * @param string $tagName

     * @param array $attributes

     * @param string $textContent

     * @return DOMElement

     */

    protected function _createElement($tagName, $attributes = array(), $textContent = null)

    {

        $element = $this->_resource->createElement($tagName);

        foreach ($attributes as $k =>$v) {

            $element->setAttribute($k, $v);

        }

        if ($textContent !== null) {

            $element->appendChild(new DOMText((string) $textContent));

        }

        return $element;

    }

    /**

     * Check barcode parameters

     *

     * @return void

     */

    protected function _checkParams()

    {

        $this->_checkDimensions();

    }

    /**

     * Check barcode dimensions

     *

     * @return void

     */

    protected function _checkDimensions()

    {

        if ($this->_resource !== null) {

            $this->_readRootElement();

            $height = (float) $this->_rootElement->getAttribute('height');

            if ($height < $this->_barcode->getHeight(true)) {

                require_once 'Zend/Barcode/Renderer/Exception.php';

                throw new Zend_Barcode_Renderer_Exception(

                    'Barcode is define outside the image (height)'

                );

            }

        } else {

            if ($this->_userHeight) {

                $height = $this->_barcode->getHeight(true);

                if ($this->_userHeight < $height) {

                    require_once 'Zend/Barcode/Renderer/Exception.php';

                    throw new Zend_Barcode_Renderer_Exception(sprintf(

                        "Barcode is define outside the image (calculated: '%d', provided: '%d')",

                        $height,

                        $this->_userHeight

                    ));

                }

            }

        }

        if ($this->_resource !== null) {

            $this->_readRootElement();

            $width = $this->_rootElement->getAttribute('width');

            if ($width < $this->_barcode->getWidth(true)) {

                require_once 'Zend/Barcode/Renderer/Exception.php';

                throw new Zend_Barcode_Renderer_Exception(

                    'Barcode is define outside the image (width)'

                );

            }

        } else {

            if ($this->_userWidth) {

                $width = (float) $this->_barcode->getWidth(true);

                if ($this->_userWidth < $width) {

                    require_once 'Zend/Barcode/Renderer/Exception.php';

                    throw new Zend_Barcode_Renderer_Exception(sprintf(

                        "Barcode is define outside the image (calculated: '%d', provided: '%d')",

                        $width,

                        $this->_userWidth

                    ));

                }

            }

        }

    }

    /**

     * Draw the barcode in the rendering resource

     * @return mixed

     */

    public function draw()

    {

        parent::draw();

        $this->_resource->appendChild($this->_rootElement);

        return $this->_resource;

    }

    /**

     * Draw and render the barcode with correct headers

     *

     * @return mixed

     */

    public function render()

    {

        $this->draw();

        header("Content-Type: image/svg+xml");

        echo $this->_resource->saveXML();

    }

    /**

     * Draw a polygon in the svg resource

     *

     * @param array $points

     * @param integer $color

     * @param boolean $filled

     */

    protected function _drawPolygon($points, $color, $filled = true)

    {

        $color = 'rgb(' . implode(', ', array(($color & 0xFF0000) >> 16,

                                              ($color & 0x00FF00) >> 8,

                                              ($color & 0x0000FF))) . ')';

        $orientation = $this->getBarcode()->getOrientation();

        $newPoints = array(

            $points[0][0] + $this->_leftOffset,

            $points[0][1] + $this->_topOffset,

            $points[1][0] + $this->_leftOffset,

            $points[1][1] + $this->_topOffset,

            $points[2][0] + $this->_leftOffset + cos(-$orientation),

            $points[2][1] + $this->_topOffset - sin($orientation),

            $points[3][0] + $this->_leftOffset + cos(-$orientation),

            $points[3][1] + $this->_topOffset - sin($orientation),

        );

        $newPoints = implode(' ', $newPoints);

        $attributes['points'] = $newPoints;

        $attributes['fill'] = $color;

        $this->_appendRootElement('polygon', $attributes);

    }

    /**

     * Draw a polygon in the svg resource

     *

     * @param string $text

     * @param float $size

     * @param array $position

     * @param string $font

     * @param integer $color

     * @param string $alignment

     * @param float $orientation

     */

    protected function _drawText($text, $size, $position, $font, $color, $alignment = 'center', $orientation = 0)

    {

        $color = 'rgb(' . implode(', ', array(($color & 0xFF0000) >> 16,

                                              ($color & 0x00FF00) >> 8,

                                              ($color & 0x0000FF))) . ')';

        $attributes['x'] = $position[0] + $this->_leftOffset;

        $attributes['y'] = $position[1] + $this->_topOffset;

        //$attributes['font-family'] = $font;

        $attributes['color'] = $color;

        $attributes['font-size'] = $size * 1.2;

        switch ($alignment) {

            case 'left':

                $textAnchor = 'start';

                break;

            case 'right':

                $textAnchor = 'end';

                break;

            case 'center':

            default:

                $textAnchor = 'middle';

        }

        $attributes['style'] = 'text-anchor: ' . $textAnchor;

        $attributes['transform'] = 'rotate('

                                 . (- $orientation)

                                 . ', '

                                 . ($position[0] + $this->_leftOffset)

                                 . ', ' . ($position[1] + $this->_topOffset)

                                 . ')';

        $this->_appendRootElement('text', $attributes, $text);

    }

}