| <?php |
| /** |
| * File containing the ezcDocumentPdfDefaultTableColumnWidthCalculator class |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| * @package Document |
| * @version //autogen// |
| * @copyright Copyright (C) 2005-2010 eZ Systems AS. All rights reserved. |
| * @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0 |
| * @access private |
| */ |
| |
| /** |
| * Table column width calculator |
| * |
| * Default implementation for a table column width calculator, which is |
| * responsible to estimate / guess / calculate sensible column width for a |
| * docbook table definition. |
| * |
| * Introspects the contents of a table and guesses based on included media and |
| * number of words in a cell what a reasonable column width might be. |
| * |
| * Since this implementation is mostly based on the count and length of words |
| * in one column, it might return unreasonably small column sizes for single |
| * columns. This might lead to columns, where not even a single characters fits |
| * in, which may cause problems while rendering. |
| * |
| * @package Document |
| * @version //autogen// |
| */ |
| class ezcDocumentPdfDefaultTableColumnWidthCalculator extends ezcDocumentPdfTableColumnWidthCalculator |
| { |
| /** |
| * Estimate column widths |
| * |
| * Should return an array with the column widths given as float numbers |
| * between 0 and 1, which all add together to 1. |
| * |
| * @param DOMElement $table |
| * @return array |
| */ |
| public function estimateWidths( DOMElement $table ) |
| { |
| $xpath = new DOMXPath( $table->ownerDocument ); |
| $columns = array(); |
| foreach ( $xpath->query( './*/*/*[local-name() = "row"] | ./*/*[local-name() = "row"]', $table ) as $rowNr => $row ) |
| { |
| foreach ( $xpath->query( './*[local-name() = "entry"]', $row ) as $cellNr => $cell ) |
| { |
| $columns[$cellNr][$rowNr]['text'] = trim( strip_tags( $cell->textContent ) ); |
| $columns[$cellNr][$rowNr]['media'] = $cell->getElementsByTagName( 'mediaobject' ); |
| } |
| } |
| |
| // Calculate guess values for amount of text in cells |
| $textFactors = array_fill( 0, count( $columns ), 0. ); |
| foreach ( $columns as $nr => $column ) |
| { |
| foreach ( $column as $cell ) |
| { |
| $words = preg_split( '(\s+)', $cell['text'] ); |
| $count = count( $words ); |
| array_map( 'strlen', $words ); |
| |
| $textFactors[$nr] += $count + max( $words ) / $count; |
| } |
| } |
| |
| // Normalize values |
| $sum = array_sum( $textFactors ); |
| foreach ( $textFactors as $nr => $factor ) |
| { |
| $textFactors[$nr] /= $sum; |
| } |
| |
| $textFactors = array_map( 'sqrt', $textFactors ); |
| |
| // Normalize values |
| $sum = array_sum( $textFactors ); |
| foreach ( $textFactors as $nr => $factor ) |
| { |
| $textFactors[$nr] /= $sum; |
| } |
| |
| return $textFactors; |
| } |
| } |
| ?> |