| <?php |
| /** |
| * File containing the ezcDocumentPdfWrappingTextBoxRenderer 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 |
| */ |
| |
| /** |
| * Renders an optionally wrapped text box |
| * |
| * Renders a single text box, like a paragraph, and applies wrapping, if the |
| * text box does not fit the current page or column. Orphans and widows are |
| * respected during this process. |
| * |
| * @package Document |
| * @access private |
| * @version //autogen// |
| */ |
| class ezcDocumentPdfWrappingTextBoxRenderer extends ezcDocumentPdfTextBoxRenderer |
| { |
| /** |
| * Render a single text box |
| * |
| * All markup inside of the given string is considered inline markup (in |
| * CSS terms). Inline markup should be given as common docbook inline |
| * markup, like <emphasis>. |
| * |
| * Returns a boolean indicator whether the rendering of the full text |
| * in the available space succeeded or not. |
| * |
| * @param ezcDocumentPdfPage $page |
| * @param ezcDocumentPdfHyphenator $hyphenator |
| * @param ezcDocumentPdfTokenizer $tokenizer |
| * @param ezcDocumentLocateableDomElement $text |
| * @param ezcDocumentPdfMainRenderer $mainRenderer |
| * @return bool |
| * |
| * @todo This method does not respect changes in the available text width, |
| * if a paragraph is wrapped to the next page. This would require token |
| * reordering, which is not implemented yet. |
| */ |
| public function renderNode( ezcDocumentPdfPage $page, ezcDocumentPdfHyphenator $hyphenator, ezcDocumentPdfTokenizer $tokenizer, ezcDocumentLocateableDomElement $text, ezcDocumentPdfMainRenderer $mainRenderer ) |
| { |
| // Inference page styles |
| $styles = $this->styles->inferenceFormattingRules( $text ); |
| $width = $mainRenderer->calculateTextWidth( $page, $text ); |
| |
| // Evaluate available space |
| if ( ( $space = $this->evaluateAvailableBoundingBox( $page, $styles, $width ) ) === false ) |
| { |
| return false; |
| } |
| |
| // Iterate over tokens and try to fit them in the current line, use |
| // hyphenator to split words. |
| $tokens = $this->tokenize( $text, $tokenizer ); |
| $lines = $this->fitTokensInLines( $tokens, $hyphenator, $space->width ); |
| |
| // Transaction wrapping around temporary page creations |
| $transaction = $this->driver->startTransaction(); |
| |
| $lineCount = count( $lines ); |
| $current = 0; |
| $position = $space->y; |
| $pageNr = 0; |
| $wrap = false; |
| $pages = array( $pageNr => array( |
| 'page' => $page, |
| 'lines' => array(), |
| 'space' => $space, |
| ) ); |
| for ( $line = 0; $line < $lineCount; ++$line ) |
| { |
| // Render on current page, of there is still enough space |
| if ( ( !$wrap ) && |
| ( ( $position + $lines[$line]['height'] ) < ( $pages[$pageNr]['space']->y + $pages[$pageNr]['space']->height ) ) ) |
| { |
| ++$current; |
| |
| // Check widows, if we are at the last line |
| if ( ( $line === ( $lineCount - 1 ) ) && |
| ( $current < $styles['widows']->value ) && |
| ( $lineCount >= $styles['widows']->value ) ) |
| { |
| $difference = $styles['widows']->value - $current; |
| $pages[$pageNr - 1]['lines'] = array_slice( $pages[$pageNr - 1]['lines'], 0, -$difference, true ); |
| $pages[$pageNr]['lines'] = array(); |
| $line = $lineCount - $styles['widows']->value - 1; |
| $current = 0; |
| continue; |
| } |
| |
| $pages[$pageNr]['lines'][] = array( |
| 'position' => $position, |
| 'line' => $lines[$line], |
| ); |
| $position += $lines[$line]['height'] * $styles['line-height']->value; |
| continue; |
| } |
| |
| // Shift to next page |
| $pages[++$pageNr] = array( |
| 'page' => $tmpPage = $mainRenderer->getNextRenderingPosition( |
| ( $pWidth = $mainRenderer->calculateTextWidth( $page, $text ) ) + |
| $styles['text-column-spacing']->value, |
| $pWidth |
| ), |
| 'lines' => array(), |
| 'space' => $this->evaluateAvailableBoundingBox( $tmpPage, $styles, $width ), |
| ); |
| $position = $pages[$pageNr]['space']->y; |
| $current = 0; |
| $wrap = false; |
| |
| // Handle orphans |
| if ( ( $line < $styles['orphans']->value ) && |
| ( $line < $lineCount ) ) |
| { |
| $pages[0]['lines'] = array(); |
| $line = -1; |
| continue; |
| } |
| |
| --$line; |
| } |
| |
| $this->driver->revert( $transaction ); |
| |
| // Render lines |
| $lineNr = 0; |
| foreach ( $pages as $nr => $content ) |
| { |
| if ( $nr > 0 ) |
| { |
| // Get next rendering position |
| $page = $mainRenderer->getNextRenderingPosition( |
| ( $pWidth = $mainRenderer->calculateTextWidth( $page, $text ) ) + |
| $styles['text-column-spacing']->value, |
| $pWidth |
| ); |
| } |
| |
| if ( !count( $content['lines'] ) ) |
| { |
| continue; |
| } |
| |
| // Render background & border |
| $space = $content['space']; |
| $lastLine = end( $content['lines'] ); |
| $space->height = $lastLine['position'] + $lastLine['line']['height'] - $space->y; |
| |
| $this->renderBoxBackground( $space, $styles ); |
| $this->renderBoxBorder( $space, $styles, $nr === 0, $nr + 1 >= count( $pages ) ); |
| $this->setBoxCovered( $page, $space, $styles ); |
| |
| // Render actual text contents |
| foreach ( $content['lines'] as $line ) |
| { |
| $this->renderLine( $line['position'], $lineNr++, $line['line'], $space, $styles ); |
| } |
| } |
| |
| return true; |
| } |
| } |
| ?> |