Subversion-Projekte lars-tiefland.php_share

<?php

// $Header: /cvsroot/html2ps/box.block.inline.php,v 1.21 2007/04/07 11:16:33 Konstantin Exp $

/**

 * @package HTML2PS

 * @subpackage Document

 *

 * Describes document elements with 'display: inline-block'.

 *

 * @link http://www.w3.org/TR/CSS21/visuren.html#value-def-inline-block CSS 2.1 description of 'display: inline-block'

 */

class InlineBlockBox extends GenericContainerBox {

  /**

   * Create new 'inline-block' element; add content from the parsed HTML tree automatically.

   *

   * @see InlineBlockBox::InlineBlockBox()

   * @see GenericContainerBox::create_content()

   */

  function &create(&$root, &$pipeline) {

    $box = new InlineBlockBox();

    $box->readCSS($pipeline->get_current_css_state());

    $box->create_content($root, $pipeline);

    return $box;

  }

  function InlineBlockBox() {

    $this->GenericContainerBox();

  }

  /**

   * Layout current inline-block element

   *

   * @param GenericContainerBox $parent The document element which should be treated as the parent of current element

   * @param FlowContext $context The flow context containing the additional layout data

   *

   * @see FlowContext

   * @see GenericContainerBox

   * @see BlockBox::reflow

   *

   * @todo this 'reflow' skeleton is common for all element types; thus, we probably should move the generic 'reflow'

   * definition to the GenericFormattedBox class, leaving only box-specific 'reflow_static' definitions in specific classes.

   *

   * @todo make relative positioning more CSS 2.1 compliant; currently, 'bottom' and 'right' CSS properties are ignored.

   *

   * @todo check whether percentage values should be really ignored during relative positioning

   */

  function reflow(&$parent, &$context) {

    /**

     * Note that we may not worry about 'position: absolute' and 'position: fixed',

     * as, according to CSS 2.1 paragraph 9.7, these values of 'position'

     * will cause 'display' value to change to either 'block' or 'table'. Thus,

     * 'inline-block' boxes will never have 'position' value other than 'static' or 'relative'

     *

     * @link http://www.w3.org/TR/CSS21/visuren.html#dis-pos-flo CSS 2.1: Relationships between 'display', 'position', and 'float'

     */

    switch ($this->get_css_property(CSS_POSITION)) {

    case POSITION_STATIC:

      return $this->reflow_static($parent, $context);

    case POSITION_RELATIVE:

      /**

       * CSS 2.1:

       * Once a box has been laid out according to the normal flow or floated, it may be shifted relative

       * to this position. This is called relative positioning. Offsetting a box (B1) in this way has no

       * effect on the box (B2) that follows: B2 is given a position as if B1 were not offset and B2 is

       * not re-positioned after B1's offset is applied. This implies that relative positioning may cause boxes

       * to overlap. However, if relative positioning causes an 'overflow:auto' box to have overflow, the UA must

       * allow the user to access this content, which, through the creation of scrollbars, may affect layout.

       *

       * @link http://www.w3.org/TR/CSS21/visuren.html#x28 CSS 2.1 Relative positioning

       */

      $this->reflow_static($parent, $context);

      $this->offsetRelative();

      return;

    }

  }

  /**

   * Layout current 'inline-block' element assument it has 'position: static'

   *

   * @param GenericContainerBox $parent The document element which should

   * be treated as the parent of current element

   *

   * @param FlowContext $context The flow context containing the additional layout data

   *

   * @see FlowContext

   * @see GenericContainerBox

   *

   * @todo re-check this layout routine; it seems that 'inline-block' boxes have

   * their width calculated incorrectly

   */

  function reflow_static(&$parent, &$context) {

    GenericFormattedBox::reflow($parent, $context);

    /**

     * Calculate margin values if they have been set as a percentage

     */

    $this->_calc_percentage_margins($parent);

    $this->_calc_percentage_padding($parent);

    /**

     * Calculate width value if it had been set as a percentage

     */

    $this->_calc_percentage_width($parent, $context);

    /**

     * Calculate 'auto' values of width and margins

     */

    $this->_calc_auto_width_margins($parent);

    /**

     * add current box to the parent's line-box (alone)

     */

    $parent->append_line($this);

    /**

     * Calculate position of the upper-left corner of the current box

     */

    $this->guess_corner($parent);

    /**

     * By default, child block box will fill all available parent width;

     * note that actual content width will be smaller because of non-zero padding, border and margins

     */

    $this->put_full_width($parent->get_width());

    /**

     * Layout element's children

     */

    $this->reflow_content($context);

    /**

     * Calculate element's baseline, as it should be aligned inside the

     * parent's line box vertically

     */

    $font = $this->get_css_property(CSS_FONT);

    $this->default_baseline = $this->get_height() + $font->size->getPoints();

    /**

     * Extend parent's height to fit current box

     */

    $parent->extend_height($this->get_bottom_margin());

    /**

     * Offset current x coordinate of parent box

     */

    $parent->_current_x = $this->get_right_margin();

  }

}

?>