. * * 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; } } ?>