| <?php |
| /** |
| * File containing the ezcDocumentPdfLiteralTokenizer 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// |
| * @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0 |
| */ |
| |
| /** |
| * Tokenizer implementation for literal blocks, preserving whitespaces. |
| * |
| * @package Document |
| * @version //autogen// |
| */ |
| class ezcDocumentPdfLiteralTokenizer extends ezcDocumentPdfTokenizer |
| { |
| /** |
| * Split string into words. |
| * |
| * This function takes a string and splits it into words. There are |
| * different mechanisms which indicate possible splitting points in the |
| * resulting word stream: |
| * |
| * - self:SPACE: The renderer might render a space |
| * - self:WRAP: The renderer might wrap the line at this position, but will |
| * not render spaces. |
| * |
| * A possible splitting of an english sentence might look like: |
| * |
| * <code> |
| * array( |
| * 'Hello', |
| * self:SPACE, |
| * 'world!', |
| * ); |
| * </code> |
| * |
| * Non breaking spaces should not be splitted into multiple words, so there |
| * will be no break applied. |
| * |
| * @param string $string |
| * @return array |
| */ |
| public function tokenize( $string ) |
| { |
| $lines = preg_split( '(\r\n|\r|\n)', $string ); |
| $tokens = array(); |
| foreach ( $lines as $nr => $line ) |
| { |
| // @todo: Use a somehow configured tab-width instead of the default; |
| $line = $this->convertTabs( $line ); |
| $words = preg_split( '(( +))', $line, -1, PREG_SPLIT_DELIM_CAPTURE ); |
| |
| // Convert spaces to the marker constant |
| foreach ( $words as $key => $word ) |
| { |
| if ( $word === '' ) |
| { |
| unset( $words[$key] ); |
| } |
| } |
| |
| $tokens = array_merge( |
| $tokens, |
| $words, |
| array( self::FORCED ) |
| ); |
| } |
| |
| return $tokens; |
| } |
| |
| /** |
| * Convert tabs to spaces. |
| * |
| * Convert all tabs to spaces, using a 8 spaces for a tab. |
| * |
| * @param string $string |
| * @param int $tabwidth |
| * @param int $offset |
| * @return string |
| */ |
| protected function convertTabs( $string, $tabwidth = 8, $offset = 0 ) |
| { |
| while ( ( $position = strpos( $string, "\t" ) ) !== false ) |
| { |
| $string = |
| substr( $string, 0, $position ) . |
| str_repeat( ' ', $tabwidth - ( ( $position + $offset ) % $tabwidth ) ) . |
| substr( $string, $position + 1 ); |
| } |
| |
| return $string; |
| } |
| } |
| |
| ?> |