<?php
  /**
   * DOMPDF - PHP5 HTML to PDF renderer
   *
   * File: $RCSfile: image_frame_reflower.cls.php,v $
   * Created on: 2004-08-08
   *
   * 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>
   * @contributor Helmut Tischer <htischer@weihenstephan.org>
   * @package dompdf
   *
   * Changes
   * @contributor Helmut Tischer <htischer@weihenstephan.org>
   * @version 0.5.1.htischer.20090507
   * - Fix image size as percent of wrapping box
   * - Fix arithmetic rounding of image size
   * - Time consuming additional image file scan only when really needed
   */
  
  /* $Id: image_frame_reflower.cls.php 357 2011-01-30 20:56:46Z fabien.menager $ */
  
  /**
   * Image reflower class
   *
   * @access private
   * @package dompdf
   */
  class Image_Frame_Reflower extends Frame_Reflower {
  
    function __construct(Image_Frame_Decorator $frame) {
      parent::__construct($frame);
    }
  
    function reflow(Frame_Decorator $block = null) {
      $this->_frame->position();
      
      //FLOAT
      //$frame = $this->_frame;
      //$page = $frame->get_root();
      //if (DOMPDF_ENABLE_CSS_FLOAT && $frame->get_style()->float !== "none" ) {
      //  $page->add_floating_frame($this);
      //}
      // Set the frame's width
      $this->get_min_max_width();
      
      if ( $block ) {
        $block->add_frame_to_line($this->_frame);
      }
    }
  
    function get_min_max_width() {
      if (DEBUGPNG) {
        // Determine the image's size. Time consuming. Only when really needed?
        list($img_width, $img_height) = dompdf_getimagesize($this->_frame->get_image_url());
        print "get_min_max_width() ".
          $this->_frame->get_style()->width.' '.
          $this->_frame->get_style()->height.';'.
          $this->_frame->get_parent()->get_style()->width." ".
          $this->_frame->get_parent()->get_style()->height.";".
          $this->_frame->get_parent()->get_parent()->get_style()->width.' '.
          $this->_frame->get_parent()->get_parent()->get_style()->height.';'.
          $img_width. ' '.
          $img_height.'|' ;
      }
  
      $style = $this->_frame->get_style();
  
      //own style auto or invalid value: use natural size in px
      //own style value: ignore suffix text including unit, use given number as px
      //own style %: walk up parent chain until found available space in pt; fill available space
      //
      //special ignored unit: e.g. 10ex: e treated as exponent; x ignored; 10e completely invalid ->like auto
  
      $width = ($style->width > 0 ? $style->width : 0);
      if ( is_percent($width) ) {
        $t = 0.0;
        for ($f = $this->_frame->get_parent(); $f; $f = $f->get_parent()) {
          $t = (float)($f->get_style()->width); //always in pt
          if ((float)$t != 0) {
          	break;
          }
        }
        $width = ((float)rtrim($width,"%") * $t)/100; //maybe 0
      } elseif ( !mb_strpos($width, 'pt') ) {
        // Don't set image original size if "%" branch was 0 or size not given.
        // Otherwise aspect changed on %/auto combination for width/height
        // Resample according to px per inch
        // See also List_Bullet_Image_Frame_Decorator::__construct
        $width = (float)($width * 72) / DOMPDF_DPI;
      }
  
      $height = ($style->height > 0 ? $style->height : 0);
      if ( is_percent($height) ) {
        $t = 0.0;
        for ($f = $this->_frame->get_parent(); $f; $f = $f->get_parent()) {
          $t = (float)($f->get_style()->height); //always in pt
          if ((float)$t != 0) {
          	break;
          }
        }
        $height = ((float)rtrim($height,"%") * $t)/100; //maybe 0
      } elseif ( !mb_strpos($height, 'pt') ) {
        // Don't set image original size if "%" branch was 0 or size not given.
        // Otherwise aspect changed on %/auto combination for width/height
        // Resample according to px per inch
        // See also List_Bullet_Image_Frame_Decorator::__construct
        $height = (float)($height * 72) / DOMPDF_DPI;
      }
  
      if ($width == 0 || $height == 0) {
        // Determine the image's size. Time consuming. Only when really needed!
        list($img_width, $img_height) = dompdf_getimagesize($this->_frame->get_image_url());
        
        // don't treat 0 as error. Can be downscaled or can be catched elsewhere if image not readable.
        // Resample according to px per inch
        // See also List_Bullet_Image_Frame_Decorator::__construct
        if ($width == 0 && $height == 0) {
          $width = (float)($img_width * 72) / DOMPDF_DPI;
          $height = (float)($img_height * 72) / DOMPDF_DPI;
        } elseif ($height == 0 && $width != 0) {
          $height = ($width / $img_width) * $img_height; //keep aspect ratio
        } elseif ($width == 0 && $height != 0) {
          $width = ($height / $img_height) * $img_width; //keep aspect ratio
        }
      }
  
      if (DEBUGPNG) print $width.' '.$height.';';
  
      $style->width = $width . "pt";
      $style->height = $height . "pt";
  
      return array( $width, $width, "min" => $width, "max" => $width);
      
    }
  }