cellmap.cls.php

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<?php
/**
 * DOMPDF - PHP5 HTML to PDF renderer
 *
 * File: $RCSfile: cellmap.cls.php,v $
 * Created on: 2004-07-28
 *
 * 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: cellmap.cls.php,v 1.2 2006/07/21 10:46:18 mschering Exp $ */

/**
 * Maps table cells to the table grid.
 *
 * This class resolves borders in tables with collapsed borders and helps
 * place row & column spanned table cells.
 *
 * @access private
 * @package dompdf
 */
class Cellmap {

  /**
   * Border style weight lookup for collapsed border resolution.
   *
   * @var array
   */
  static protected $_BORDER_STYLE_SCORE = array("inset"  => 1,
                                                "groove" => 2,
                                                "outset" => 3,
                                                "ridge"  => 4,
                                                "dotted" => 5,
                                                "dashed" => 6,
                                                "solid"  => 7,
                                                "double" => 8,
                                                "none"   => 0);

  /**
   * The table object this cellmap is attached to.
   *
   * @var Table_Frame_Decorator
   */
  protected $_table;
  
  /**
   * The total number of rows in the table
   *
   * @var int
   */
  protected $_num_rows;

  /**
   * The total number of columns in the table
   *
   * @var int
   */
  protected $_num_cols;

  /**
   * 2D array mapping <row,column> to frames
   *
   * @var array
   */
  protected $_cells;

  /**
   * 1D array of column dimensions
   *
   * @var array
   */
  protected $_columns;

  /**
   * 1D array of row dimensions
   *
   * @var array
   */
  protected $_rows;

  /**
   * 2D array of border specs
   *
   * @var array
   */
  protected $_borders;

  /**
   * 1D Array mapping frames to (multiple) <row, col> pairs, keyed on
   * frame_id.
   *
   * @var array
   */
  protected $_frames;

  /**
   * Current column when adding cells, 0-based
   *
   * @var int
   */
  private $__col;

  /**
   * Current row when adding cells, 0-based
   *
   * @var int
   */
  private $__row;
  
  //........................................................................

  function __construct(Table_Frame_Decorator $table) {
    $this->_table = $table;
    $this->reset();
  }

  //........................................................................

  function reset() {    
    $this->_num_rows = 0;
    $this->_num_cols = 0;

    $this->_cells  = array();
    $this->_frames = array();

    $this->_columns = array();
    $this->_rows = array();   

    $this->_borders = array();
    
    $this->__col = $this->__row = 0;
  }
  
  //........................................................................

  function get_num_rows() { return $this->_num_rows; }
  function get_num_cols() { return $this->_num_cols; }

  function &get_columns() {
    return $this->_columns;
  }
  
  function &get_column($i) {
    if ( !isset($this->_columns[$i]) )
      $this->_columns[$i] = array("x" => 0,
                                  "min-width" => 0,
                                  "max-width" => 0,
                                  "used-width" => null,
                                  "absolute" => 0,
                                  "percent" => 0,
                                  "auto" => true);

    return $this->_columns[$i];
  }

  function &get_rows() {
    return $this->_rows;
  }
  
  function &get_row($j) {
    if ( !isset($this->_rows[$j]) )
      $this->_rows[$j] = array("y" => 0,
                               "first-column" => 0,
                               "height" => null);
    return $this->_rows[$j];
  }

  function get_border($i, $j, $h_v, $prop = null) {
    if ( !isset($this->_borders[$i][$j][$h_v]) )
      $this->_borders[$i][$j][$h_v] = array("width" => 0,
                                           "style" => "solid",
                                           "color" => "black");
    if ( isset($prop) )
      return $this->_borders[$i][$j][$h_v][$prop];
    
    return $this->_borders[$i][$j][$h_v];
  }
  
  function get_border_properties($i, $j) {
    
    $left = $this->get_border($i, $j, "vertical");
    $right = $this->get_border($i, $j+1, "vertical");
    $top = $this->get_border($i, $j, "horizontal");
    $bottom = $this->get_border($i+1, $j, "horizontal");
    
    return compact("top", "bottom", "left", "right");
  }
  
  //........................................................................

  function get_spanned_cells($frame) {
    $key = $frame->get_id();

    if ( !isset($this->_frames[$key]) ) {
      throw new DOMPDF_Internal_Exception("Frame not found in cellmap");
    }
      
    return $this->_frames[$key];
    
  }

  function get_frame_position($frame) {
    global $_dompdf_warnings;
    
    $key = $frame->get_id();

    if ( !isset($this->_frames[$key]) ) {
      throw new DOMPDF_Internal_Exception("Frame not found in cellmap");
    }

    $col = $this->_frames[$key]["columns"][0];
    $row = $this->_frames[$key]["rows"][0];

    if ( !isset($this->_columns[$col])) {
      $_dompdf_warnings[] = "Frame not found in columns array.  Check your table layout for missing or extra TDs.";
      $x = 0;
    } else 
      $x = $this->_columns[$col]["x"];
    
    if ( !isset($this->_rows[$row])) {
      $_dompdf_warnings[] = "Frame not found in row array.  Check your table layout for missing or extra TDs.";
      $y = 0;
    } else 
      $y = $this->_rows[$row]["y"];

    return array($x, $y, "x" => $x, "y" => $y);
  }
  
  function get_frame_width($frame) {
    $key = $frame->get_id();

    if ( !isset($this->_frames[$key]) ) {
      throw new DOMPDF_Internal_Exception("Frame not found in cellmap");
    }

    $cols = $this->_frames[$key]["columns"];
    $w = 0;
    foreach ($cols as $i)
      $w += $this->_columns[$i]["used-width"];

    return $w;
    
  }
  
  function get_frame_height($frame) {
    $key = $frame->get_id();

    if ( !isset($this->_frames[$key]) ) 
      throw new DOMPDF_Internal_Exception("Frame not found in cellmap");

    $rows = $this->_frames[$key]["rows"];
    $h = 0;
    foreach ($rows as $i) {
      if ( !isset($this->_rows[$i]) )  {
        throw new Exception("foo");
      }
      $h += $this->_rows[$i]["height"];
    }
    return $h;
    
  }

  
  //........................................................................

  function set_column_width($j, $width) {
    $col =& $this->get_column($j);
    $col["used-width"] = $width;
    $next_col =& $this->get_column($j+1);
    $next_col["x"] = $next_col["x"] + $width;    
  }
  
  function set_row_height($i, $height) {
    $row =& $this->get_row($i);    
    if ( $height <= $row["height"] )
      return;
    
    $row["height"] = $height;
    $next_row =& $this->get_row($i+1);
    $next_row["y"] = $row["y"] + $height;

  }

  //........................................................................


  protected function _resolve_border($i, $j, $h_v, $border_spec) {
    $n_width = $border_spec["width"];
    $n_style = $border_spec["style"];
    $n_color = $border_spec["color"];
    
    if ( !isset($this->_borders[$i][$j][$h_v]) ) {
      $this->_borders[$i][$j][$h_v] = $border_spec;
      return $this->_borders[$i][$j][$h_v]["width"];
    }
    
    $o_width = $this->_borders[$i][$j][$h_v]["width"];
    $o_style = $this->_borders[$i][$j][$h_v]["style"];
    $o_color = $this->_borders[$i][$j][$h_v]["color"];

    if ( ($n_style === "hidden" ||
          $n_width  >  $o_width ||
          $o_style === "none")

         or

         ($o_width == $n_width &&
          in_array($n_style, self::$_BORDER_STYLE_SCORE) &&
          self::$_BORDER_STYLE_SCORE[ $n_style ] > self::$_BORDER_STYLE_SCORE[ $o_style ]) )
      $this->_borders[$i][$j][$h_v] = $border_spec;

    return $this->_borders[$i][$j][$h_v]["width"];
  }
  
  //........................................................................

  function add_frame(Frame $frame) {
    $style = $frame->get_style();    
    $display = $style->display;