Subversion-Projekte lars-tiefland.php_share

<?php

require_once(HTML2PS_DIR.'value.generic.php');

/**

 * @package HTML2PS

 * @subpackage Document

 * Represents the 'background' CSS property value (including 'background-...' subproperties).

 *

 * @link http://www.w3.org/TR/CSS21/colors.html#propdef-background CSS 2.1 'background' property description

 */

class Background extends CSSValue {

  /**

   * @var Color Contains the 'background-color' CSS subproperty value

   * @access private

   */

  var $_color;

  /**

   * @var BackgroundImage Contains the 'background-image' CSS subproperty value

   * @access private

   */

  var $_image;

  /**

   * @var int Contains the 'background-repeat' CSS subproperty value (enumeration)

   * @access private

   */

  var $_repeat;

  /**

   * @var BackgroundPosition Containg the 'background-position' CSS subproperty value

   * @access private

   */

  var $_position;

  var $_attachment;

  /**

   * Constructs a new object containing a background information

   *

   * @param Color $color 'background-color' value

   * @param BackgroundImage $image 'background-image' value

   * @param int $repeat 'background-repeat' value

   * @param BackgroundPosition $position 'background-position' value

   */

  function Background($color, $image, $repeat, $position, $attachment) {

    $this->_color      = $color;

    $this->_image      = $image;

    $this->_repeat     = $repeat;

    $this->_position   = $position;

    $this->_attachment = $attachment;

  }

  /**

   * "Deep copy" routine

   *

   * @return Background A copy of current object

   */

  function &copy() {

    $value =& new Background(is_null($this->_color) ? null : $this->_color->copy(),

                             is_null($this->_image) ? null : $this->_image->copy(),

                             $this->_repeat,

                             is_null($this->_position) ? null : $this->_position->copy(),

                             $this->_attachment);

    return $value;

  }

  /**

   * Tests if the 'background' CSS property value is the default property value; e.g.

   * all subproperty values are set to defaults.

   *

   * @return bool Flag indicating if current object have default value

   *

   * @see CSSBackgroundColor::default_value

   * @see BackgroundImage::is_default

   * @see CSSBackgroundRepeat::default_value

   * @see BackgroundPosition::is_default

   */

  function is_default() {

    return

      $this->_color->equals(CSSBackgroundColor::default_value()) &&

      $this->_image->is_default() &&

      $this->_repeat == CSSBackgroundRepeat::default_value() &&

      $this->_position->is_default() &&

      $this->_attachment->is_default();

  }

  /**

   * Renders the background for the given box object using an output driver

   *

   * @param OutputDriver $driver Output driver to be used

   * @param GenericFormattedBox $box Box the background is rendered for

   *

   * @uses GenericFormattedBox

   * @uses OutputDriver

   */

  function show(&$driver, &$box) {

    /**

     * Fill box with background color

     *

     * @see Color::apply

     * @see OutputDriver::moveto

     * @see OutputDriver::lineto

     * @see OutputDriver::closepath

     * @see OutputDriver::fill

     */

    if (!$this->_color->transparent) {

      $this->_color->apply($driver);

      $driver->moveto($box->get_left_background(), $box->get_top_background());

      $driver->lineto($box->get_right_background(), $box->get_top_background());

      $driver->lineto($box->get_right_background(), $box->get_bottom_background());

      $driver->lineto($box->get_left_background(), $box->get_bottom_background());

      $driver->closepath();

      $driver->fill();

    };

    /**

     * Render background image

     *

     * @see BackgroundImage::show

     */

    $this->_image->show($driver, $box, $this->_repeat, $this->_position, $this->_attachment);

  }

  /**

   * Converts the absolute lengths used in subproperties (if any) to the device points

   *

   * @param float $font_size Font size to use during conversion of 'ex' and 'em' units

   */

  function units2pt($font_size) {

    $this->_position->units2pt($font_size);

  }

  function doInherit(&$state) {

    if ($this->_color === CSS_PROPERTY_INHERIT) {

      $value =& $state->getInheritedProperty(CSS_BACKGROUND_COLOR);

      $this->_color = $value->copy();

    };

    if ($this->_image === CSS_PROPERTY_INHERIT) {

      $value =& $state->getInheritedProperty(CSS_BACKGROUND_IMAGE);

      $this->_image = $value->copy();

    };

    if ($this->_position === CSS_PROPERTY_INHERIT) {

      $value =& $state->getInheritedProperty(CSS_BACKGROUND_POSITION);

      $this->_position = $value->copy();

    };

    if ($this->_repeat === CSS_PROPERTY_INHERIT) {

      $this->_repeat = $state->getInheritedProperty(CSS_BACKGROUND_REPEAT);

    };

    if ($this->_attachment === CSS_PROPERTY_INHERIT) {

      $this->_attachment =& $state->getInheritedProperty(CSS_BACKGROUND_ATTACHMENT);

    };

  }

}

?>