page_frame_reflower.cls.php

来自「国外很不错的一个开源OA系统Group-Office」· PHP 代码 · 共 93 行

<?php
/**
 * DOMPDF - PHP5 HTML to PDF renderer
 *
 * File: $RCSfile: page_frame_reflower.cls.php,v $
 * Created on: 2004-06-16
 *
 * Copyright (c) 2004 - Benj Carson <[e-mail]>
 *
 * 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.digitaljunkies.ca/dompdf
 *
 * @link http://www.digitaljunkies.ca/dompdf
 * @copyright 2004 Benj Carson
 * @author Benj Carson <[e-mail]>
 * @package dompdf
 * @version 0.5.1
 */

/* $Id: page_frame_reflower.cls.php,v 1.2 2006/07/21 10:46:19 mschering Exp $ */

/**
 * Reflows pages
 *
 * @access private
 * @package dompdf
 */
class Page_Frame_Reflower extends Frame_Reflower {


  function __construct(Page_Frame_Decorator $frame) { parent::__construct($frame); }
  
  //........................................................................

  function reflow() {
    $style = $this->_frame->get_style();
    
    // Paged layout:
    // http://www.w3.org/TR/CSS21/page.html

    // Pages are only concerned with margins
    $cb = $this->_frame->get_containing_block();
    $left = $style->length_in_pt($style->margin_left, $cb["w"]);
    $right = $style->length_in_pt($style->margin_right, $cb["w"]);
    $top = $style->length_in_pt($style->margin_top, $cb["w"]);
    $bottom = $style->length_in_pt($style->margin_bottom, $cb["w"]);
    
    $content_x = $cb["x"] + $left;
    $content_y = $cb["y"] + $top;
    $content_width = $cb["w"] - $left - $right;
    $content_height = $cb["h"] - $top - $bottom;

    $child = $this->_frame->get_first_child();

    while ($child) {

      $child->set_containing_block($content_x, $content_y, $content_width, $content_height);
      $child->reflow();
      $next_child = $child->get_next_sibling();
      
      // Render the page
      $this->_frame->get_renderer()->render($child);
      if ( $next_child )
        $this->_frame->next_page();

      // Dispose of all frames on the old page
      $child->dispose(true);
      
      $child = $next_child;
    }
  }  
}