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<?php |
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/* |
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* This file is part of the trefoil application. |
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* |
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* (c) Miguel Angel Gabriel <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Trefoil\Helpers; |
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use Easybook\Parsers\ParserInterface; |
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/** |
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* This class: |
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* - Transforms a "simple" HTML table into a "complex" table, |
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* where "simple" means "without rowspan or colspan cells". |
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* - For headless tables, transforms the <td> cells in first column |
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* within <strong> tags into <th> cells (making a vertical head). |
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* |
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* Complex tables functionality details: |
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* ------------------------------------ |
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* |
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* It is designed to allow HTML tables generated from Markdown content |
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* to have the extra funcionality of rowspan or colspan without having |
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* to modify the parser. |
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* |
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* For the transformations to work, cell contents must follow some simple |
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* rules: |
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* |
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* - A cell containing only ["] (a single double quote) or ['] a single |
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* single quote => rowspanned cell(meaning it is joined with the same |
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* cell of the preceding row). The difference between using double |
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* or single quotes is the vertical alignment: |
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* - double quote: middle alignmet. |
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* - single quote: top alignment. |
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* |
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* - An empty cell => colspanned cell (meaning it is joined with the same |
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* cell of the preceding column. |
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* |
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*/ |
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class TableExtra |
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{ |
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/** @var ParserInterface */ |
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protected $markdownParser; |
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/** |
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* @param ParserInterface $markdownParser |
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*/ |
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public function setMarkdownParser($markdownParser) |
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{ |
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$this->markdownParser = $markdownParser; |
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} |
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/** |
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* Processes all tables in the html string |
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* |
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* @param string $htmlString |
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* |
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* @return string |
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*/ |
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public function processAllTables($htmlString) |
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{ |
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$regExp = '/'; |
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$regExp .= '(?<table><table.*<\/table>)'; |
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$regExp .= '/Ums'; // Ungreedy, multiline, dotall |
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// PHP 5.3 compat |
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$me = $this; |
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$callback = function ($matches) use ($me) { |
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$table = $me->internalParseTable($matches['table']); |
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if (!$table) { |
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return $matches[0]; |
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} |
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$table = $me->internalProcessExtraTable($table); |
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$html = $me->internalRenderTable($table); |
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return $html; |
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}; |
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$output = preg_replace_callback($regExp, $callback, $htmlString); |
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return $output; |
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} |
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/** |
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* @param $tableHtml |
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* |
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* @return array |
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* |
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* @internal Should be protected but made public for PHP 5.3 compat |
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*/ |
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public function internalParseTable($tableHtml) |
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{ |
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$table = array(); |
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$table['thead'] = $this->extractRows($tableHtml, 'thead'); |
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$table['tbody'] = $this->extractRows($tableHtml, 'tbody'); |
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if (!$table['thead'] && !$table['tbody']) { |
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$table['table'] = $this->extractRows($tableHtml, 'table'); |
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} |
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return $table; |
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} |
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protected function extractRows($tableHtml, $tag = 'tbody') |
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{ |
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// extract section |
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$regExp = sprintf('/<%s>(?<contents>.*)<\/%s>/Ums', $tag, $tag); |
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preg_match_all($regExp, $tableHtml, $matches, PREG_SET_ORDER); |
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if (!isset($matches[0]['contents'])) { |
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return array(); |
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} |
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// extract all rows from section |
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$thead = $matches[0]['contents']; |
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$regExp = '/<tr>(?<contents>.*)<\/tr>/Ums'; |
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preg_match_all($regExp, $thead, $matches, PREG_SET_ORDER); |
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if (!isset($matches[0]['contents'])) { |
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return array(); |
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} |
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// extract columns from each row |
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$rows = array(); |
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foreach ($matches as $matchRow) { |
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$tr = $matchRow['contents']; |
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$regExp = '/<(?<tag>t[hd])(?<attr>.*)>(?<contents>.*)<\/t[hd]>/Ums'; |
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preg_match_all($regExp, $tr, $matchesCol, PREG_SET_ORDER); |
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$cols = array(); |
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if ($matchesCol) { |
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foreach ($matchesCol as $matchCol) { |
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$cols[] = array( |
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'tag' => $matchCol['tag'], |
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'attributes' => $this->extractAttributes($matchCol['attr']), |
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'contents' => $matchCol['contents'] |
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); |
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} |
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} |
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$rows[] = $cols; |
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} |
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return $rows; |
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} |
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/** |
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* @param array $table |
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* |
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* @return array |
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* |
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* @internal Should be protected but made public for PHP 5.3 compat |
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*/ |
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public function internalProcessExtraTable(array $table) |
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{ |
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// process and adjusts table definition |
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$headless = true; |
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foreach ($table['thead'] as $row) { |
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foreach ($row as $cell) { |
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if (empty($cell['contents'])) { |
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$headless = true; |
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break 2; |
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} |
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} |
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} |
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// headless table |
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if ($headless && $table['tbody']) { |
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$table['tbody'] = $this->processFirstColumnCells($table['tbody']); |
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} |
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// table with head and body |
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if ($table['thead'] || $table['tbody']) { |
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$table['thead'] = $this->processMultilineCells($table['thead']); |
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$table['thead'] = $this->processSpannedCells($table['thead']); |
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$table['tbody'] = $this->processMultilineCells($table['tbody']); |
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$table['tbody'] = $this->processSpannedCells($table['tbody']); |
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return $table; |
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} |
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// table without head or body |
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$table['table'] = $this->processMultilineCells($table['table']); |
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$table['table'] = $this->processSpannedCells($table['table']); |
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return $table; |
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} |
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/** |
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* Join the cells that belong to multiline cells. |
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* |
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* @param $rows |
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* |
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* @return array Processed table rows |
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*/ |
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protected function processMultilineCells(array $rows) |
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{ |
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$newRows = $rows; |
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foreach ($newRows as $rowIndex => $row) { |
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foreach ($row as $colIndex => $col) { |
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$cell = $newRows[$rowIndex][$colIndex]; |
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$cellText = rtrim($cell['contents']); |
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if (substr($cellText, -1, 1) === '+') { |
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// continued cell |
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$newCell = array(); |
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$newCell[] = substr($cellText, 0, -1); |
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// find all the continuation cells (same col) |
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for ($nextRowIndex = $rowIndex + 1; $nextRowIndex < count($newRows); $nextRowIndex++) { |
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$nextCell = $newRows[$nextRowIndex][$colIndex]; |
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$cellText = rtrim($nextCell['contents']); |
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$newRows[$nextRowIndex][$colIndex]['contents'] = ''; |
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// continued cell? |
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$continued = (substr($cellText, -1, 1) === '+'); |
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if ($continued) { |
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// clean the ending (+) |
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$cellText = substr($cellText, 0, -1); |
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} |
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// save cleaned text |
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$newCell[] = $cellText; |
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if (!$continued) { |
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// no more continuations |
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break; |
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} |
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} |
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if ($this->markdownParser) { |
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$parsedCell = $this->markdownParser->transform(join("\n\n", $newCell)); |
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} else { |
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// safe default |
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$parsedCell = join("<br/>", $newCell); |
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} |
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$newRows[$rowIndex][$colIndex]['contents'] = $parsedCell; |
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} |
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} |
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} |
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// remove empty rows left by the process |
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$newRows2 = array(); |
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foreach ($newRows as $rowIndex => $row) { |
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$emptyRow = true; |
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foreach ($row as $colIndex => $col) { |
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$cellText = trim($col['contents']); |
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if (!empty($cellText)) { |
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$emptyRow = false; |
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} |
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} |
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if (!$emptyRow) { |
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$newRows2[] = $row; |
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} |
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} |
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return $newRows2; |
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} |
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/** |
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* Converts <td> cells into <th> for first column cells that are fully bold. |
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* |
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* @param array $rows |
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* |
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* @return array Processed rows |
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*/ |
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protected function processFirstColumnCells(array $rows) |
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{ |
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$newRows = $rows; |
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foreach ($newRows as $rowIndex => $row) { |
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// examine first cell ir row |
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$cell = $newRows[$rowIndex][0]; |
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$cellText = rtrim($cell['contents']); |
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$regExp = '/^<strong>.*<\/strong>$/Us'; |
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if (preg_match($regExp, $cellText, $matches)) { |
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$cell['tag'] = 'th'; |
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// change cell to <th> |
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$newRows[$rowIndex][0]['tag'] = 'th'; |
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} |
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} |
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return $newRows; |
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} |
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/** |
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305
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* Process spanned rows, creating the right HTML markup. |
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306
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* |
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307
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* @param array $rows |
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308
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* |
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* @return array Processed rows |
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310
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*/ |
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protected |
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3 |
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function processSpannedCells(array $rows) |
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{ |
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3 |
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$newRows = $rows; |
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3 |
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foreach ($rows as $rowIndex => $row) { |
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3 |
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foreach ($row as $colIndex => $col) { |
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319
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// an empty cell => colspanned cell |
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3 |
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if (!$col['contents']) { |
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322
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// find the primary colspanned cell (same row) |
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3 |
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$colspanCol = -1; |
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3 |
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for ($j = $colIndex - 1; $j >= 0; $j--) { |
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3 |
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if (!isset($newRows[$rowIndex][$j]['ignore']) || |
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1 |
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(isset($newRows[$rowIndex][$j]['ignore']) && $j == 0) |
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3 |
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) { |
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3 |
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$colspanCol = $j; |
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3 |
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break; |
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} |
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1 |
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} |
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|
|
|
|
333
|
3 |
|
if ($colspanCol >= 0) { |
|
334
|
|
|
// increment colspan counter |
|
335
|
3 |
|
if (!isset($newRows[$rowIndex][$colspanCol]['colspan'])) { |
|
336
|
3 |
|
$newRows[$rowIndex][$colspanCol]['colspan'] = 1; |
|
337
|
3 |
|
} |
|
338
|
3 |
|
$newRows[$rowIndex][$colspanCol]['colspan']++; |
|
339
|
|
|
|
|
340
|
|
|
// ignore this cell |
|
341
|
3 |
|
$newRows[$rowIndex][$colIndex]['ignore'] = true; |
|
342
|
3 |
|
} |
|
343
|
|
|
|
|
344
|
3 |
|
continue; |
|
345
|
|
|
} |
|
346
|
|
|
|
|
347
|
|
|
// a cell with only '"' as contents => rowspanned cell (same column) |
|
348
|
|
|
// consider several kind of double quote character |
|
349
|
|
|
// and the single quote character as a top alignment marker |
|
350
|
|
|
$quotes = array( |
|
351
|
3 |
|
'"', |
|
352
|
3 |
|
'"', |
|
353
|
3 |
|
'"', |
|
354
|
3 |
|
'“', |
|
355
|
3 |
|
'“', |
|
356
|
3 |
|
'”', |
|
357
|
3 |
|
'”', |
|
358
|
|
|
"'" |
|
359
|
3 |
|
); |
|
360
|
3 |
|
if (in_array($col['contents'], $quotes)) { |
|
361
|
|
|
|
|
362
|
|
|
// find the primary rowspanned cell |
|
363
|
3 |
|
$rowspanRow = -1; |
|
364
|
3 |
|
for ($i = $rowIndex - 1; $i >= 0; $i--) { |
|
365
|
3 |
|
if (!isset($newRows[$i][$colIndex]['ignore'])) { |
|
366
|
3 |
|
$rowspanRow = $i; |
|
367
|
3 |
|
break; |
|
368
|
|
|
} |
|
369
|
1 |
|
} |
|
370
|
|
|
|
|
371
|
3 |
|
if ($rowspanRow >= 0) { |
|
372
|
|
|
// increment rowspan counter |
|
373
|
3 |
|
if (!isset($newRows[$rowspanRow][$colIndex]['rowspan'])) { |
|
374
|
3 |
|
$newRows[$rowspanRow][$colIndex]['rowspan'] = 1; |
|
375
|
|
|
|
|
376
|
|
|
// set vertical alignement to 'middle' for double quote or |
|
377
|
|
|
// 'top' for single quote |
|
378
|
3 |
|
if (!isset($newRows[$rowspanRow][$colIndex]['attributes']['style'])) { |
|
379
|
3 |
|
$newRows[$rowspanRow][$colIndex]['attributes']['style'] = ''; |
|
380
|
3 |
|
} else { |
|
381
|
|
|
$newRows[$rowspanRow][$colIndex]['attributes']['style'] .= ';'; |
|
382
|
|
|
} |
|
383
|
3 |
|
$newRows[$rowspanRow][$colIndex]['attributes']['style'] .= 'vertical-align: middle;'; |
|
384
|
3 |
|
if ($col['contents'] === "'") { |
|
385
|
1 |
|
$newRows[$rowspanRow][$colIndex]['attributes']['style'] .= 'vertical-align: top;'; |
|
386
|
1 |
|
} |
|
387
|
3 |
|
} |
|
388
|
3 |
|
$newRows[$rowspanRow][$colIndex]['rowspan']++; |
|
389
|
|
|
|
|
390
|
3 |
|
$newRows[$rowIndex][$colIndex]['ignore'] = true; |
|
391
|
3 |
|
} |
|
392
|
3 |
|
} |
|
393
|
3 |
|
} |
|
394
|
3 |
|
} |
|
395
|
|
|
|
|
396
|
3 |
|
return $newRows; |
|
397
|
|
|
} |
|
398
|
|
|
|
|
399
|
|
|
/** |
|
400
|
|
|
* @param array $table |
|
401
|
|
|
* |
|
402
|
|
|
* @return string |
|
403
|
|
|
* |
|
404
|
|
|
* @internal Should be protected but made public for PHP 5.3 compat |
|
405
|
|
|
*/ |
|
406
|
|
|
public |
|
407
|
3 |
|
function internalRenderTable(array $table) |
|
408
|
|
|
{ |
|
409
|
3 |
|
$html = '<table>'; |
|
410
|
|
|
|
|
411
|
3 |
View Code Duplication |
if (isset($table['thead']) && $table['thead']) { |
|
412
|
2 |
|
$html .= '<thead>'; |
|
413
|
2 |
|
$html .= $this->renderRows($table['thead']); |
|
414
|
2 |
|
$html .= '</thead>'; |
|
415
|
2 |
|
} |
|
416
|
|
|
|
|
417
|
3 |
View Code Duplication |
if (isset($table['tbody']) && $table['tbody']) { |
|
418
|
2 |
|
$html .= '<tbody>'; |
|
419
|
2 |
|
$html .= $this->renderRows($table['tbody']); |
|
420
|
2 |
|
$html .= '</tbody>'; |
|
421
|
2 |
|
} |
|
422
|
|
|
|
|
423
|
3 |
|
if (isset($table['table']) && $table['table']) { |
|
424
|
1 |
|
$html .= $this->renderRows($table['table']); |
|
425
|
1 |
|
} |
|
426
|
|
|
|
|
427
|
3 |
|
$html .= '</table>'; |
|
428
|
|
|
|
|
429
|
3 |
|
return $html; |
|
430
|
|
|
} |
|
431
|
|
|
|
|
432
|
|
|
protected |
|
433
|
3 |
|
function renderRows($rows) |
|
434
|
|
|
{ |
|
435
|
3 |
|
$html = ''; |
|
436
|
|
|
|
|
437
|
3 |
|
foreach ($rows as $row) { |
|
438
|
3 |
|
$html .= '<tr>'; |
|
439
|
3 |
|
foreach ($row as $col) { |
|
440
|
3 |
|
if (!isset($col['ignore'])) { |
|
441
|
3 |
|
$rowspan = isset($col['rowspan']) ? sprintf('rowspan="%s"', $col['rowspan']) : ''; |
|
442
|
3 |
|
$colspan = isset($col['colspan']) ? sprintf('colspan="%s"', $col['colspan']) : ''; |
|
443
|
|
|
|
|
444
|
3 |
|
$attributes = $this->renderAttributes($col['attributes']); |
|
445
|
|
|
|
|
446
|
3 |
|
$html .= sprintf( |
|
447
|
3 |
|
'<%s %s %s %s>%s</%s>', |
|
448
|
3 |
|
$col['tag'], |
|
449
|
3 |
|
$rowspan, |
|
450
|
3 |
|
$colspan, |
|
451
|
3 |
|
$attributes, |
|
452
|
3 |
|
$col['contents'], |
|
453
|
3 |
|
$col['tag'] |
|
454
|
3 |
|
); |
|
455
|
3 |
|
} |
|
456
|
3 |
|
} |
|
457
|
3 |
|
$html .= '</tr>'; |
|
458
|
3 |
|
} |
|
459
|
|
|
|
|
460
|
3 |
|
return $html; |
|
461
|
|
|
} |
|
462
|
|
|
|
|
463
|
|
|
/** |
|
464
|
|
|
* @param string $string |
|
465
|
|
|
* |
|
466
|
|
|
* @return array of attributes |
|
467
|
|
|
*/ |
|
468
|
|
View Code Duplication |
protected |
|
469
|
3 |
|
function extractAttributes($string) |
|
470
|
|
|
{ |
|
471
|
3 |
|
$regExp = '/(?<attr>.*)="(?<value>.*)"/Us'; |
|
472
|
3 |
|
preg_match_all($regExp, $string, $attrMatches, PREG_SET_ORDER); |
|
473
|
|
|
|
|
474
|
3 |
|
$attributes = array(); |
|
475
|
3 |
|
if ($attrMatches) { |
|
476
|
1 |
|
foreach ($attrMatches as $attrMatch) { |
|
477
|
1 |
|
$attributes[trim($attrMatch['attr'])] = $attrMatch['value']; |
|
478
|
1 |
|
} |
|
479
|
1 |
|
} |
|
480
|
|
|
|
|
481
|
3 |
|
return $attributes; |
|
482
|
|
|
} |
|
483
|
|
|
|
|
484
|
|
View Code Duplication |
protected |
|
485
|
3 |
|
function renderAttributes(array $attributes) |
|
486
|
|
|
{ |
|
487
|
3 |
|
$html = ''; |
|
488
|
|
|
|
|
489
|
3 |
|
foreach ($attributes as $name => $value) { |
|
490
|
3 |
|
$html .= sprintf('%s="%s" ', $name, $value); |
|
491
|
3 |
|
} |
|
492
|
|
|
|
|
493
|
3 |
|
return $html; |
|
494
|
|
|
} |
|
495
|
|
|
|
|
496
|
|
|
} |
|
497
|
|
|
|
If the size of the collection does not change during the iteration, it is generally a good practice to compute it beforehand, and not on each iteration: