<?php
  /**
   * DOMPDF - PHP5 HTML to PDF renderer
   *
   * File: $RCSfile: absolute_positioner.cls.php,v $
   * Created on: 2004-06-08
   *
   * Copyright (c) 2004 - Benj Carson <benjcarson@digitaljunkies.ca>
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License
   * along with this library in the file LICENSE.LGPL; if not, write to the
   * Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   * 02111-1307 USA
   *
   * Alternatively, you may distribute this software under the terms of the
   * PHP License, version 3.0 or later.  A copy of this license should have
   * been distributed with this file in the file LICENSE.PHP .  If this is not
   * the case, you can obtain a copy at http://www.php.net/license/3_0.txt.
   *
   * The latest version of DOMPDF might be available at:
   * http://www.dompdf.com/
   *
   * @link http://www.dompdf.com/
   * @copyright 2004 Benj Carson
   * @author Benj Carson <benjcarson@digitaljunkies.ca>
   * @package dompdf
  
   */
  
  /* $Id */
  
  /**
   * Positions absolutly positioned frames
   */
  class Absolute_Positioner extends Positioner {
  
    function __construct(Frame_Decorator $frame) { parent::__construct($frame); }
  
    function position() {
  
      $frame = $this->_frame;
      $style = $frame->get_style();
      $cb = $frame->get_containing_block();
  
      $top =    $style->length_in_pt($style->top,    $cb["h"]);
      $right =  $style->length_in_pt($style->right,  $cb["w"]);
      $bottom = $style->length_in_pt($style->bottom, $cb["h"]);
      $left =   $style->length_in_pt($style->left,   $cb["w"]);
      
      $p = $frame->find_positionned_parent();
  
      if ( $p ) {
        // Get the parent's padding box (see http://www.w3.org/TR/CSS21/visuren.html#propdef-top)
        list($x, $y, $w, $h) = $p->get_padding_box();
      } else {
        $x = $cb["x"];
        $y = $cb["y"];
      }
  
      if ( $top !== "auto" ) {
        $y += $top;
      } else if ( $bottom !== "auto" ) {
        // FIXME: need to know this frame's height before we can do this correctly
      }
  
      if ( $left !== "auto" ) {
        $x += $left;
      } else if ( $right !== "auto" ) {
        // FIXME: need to know this frame's width before we can do this correctly
      }
  
      $frame->set_position($x, $y);
  
    }
  }