226 lines
6.6 KiB
PHP
226 lines
6.6 KiB
PHP
<?php
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/**
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*
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* Parses for table markup.
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*
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* @category Text
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*
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* @package Text_Wiki
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*
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* @author Paul M. Jones <pmjones@php.net>
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*
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* @license LGPL
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*
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* @version $Id: Table.php,v 1.3 2005/02/23 17:38:29 pmjones Exp $
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*
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*/
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/**
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*
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* Parses for table markup.
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*
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* This class implements a Text_Wiki_Parse to find source text marked as a
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* set of table rows, where a line start and ends with double-pipes (||)
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* and uses double-pipes to separate table cells. The rows must be on
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* sequential lines (no blank lines between them) -- a blank line
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* indicates the beginning of a new table.
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*
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* @category Text
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*
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* @package Text_Wiki
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*
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* @author Paul M. Jones <pmjones@php.net>
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*
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*/
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class Text_Wiki_Parse_Table extends Text_Wiki_Parse {
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/**
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*
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* The regular expression used to parse the source text and find
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* matches conforming to this rule. Used by the parse() method.
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*
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* @access public
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*
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* @var string
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*
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* @see parse()
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*
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*/
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var $regex = '/\n((\|\|).*)(\n)(?!(\|\|))/Us';
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/**
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*
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* Generates a replacement for the matched text.
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*
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* Token options are:
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*
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* 'type' =>
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* 'table_start' : the start of a bullet list
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* 'table_end' : the end of a bullet list
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* 'row_start' : the start of a number list
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* 'row_end' : the end of a number list
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* 'cell_start' : the start of item text (bullet or number)
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* 'cell_end' : the end of item text (bullet or number)
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*
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* 'cols' => the number of columns in the table (for 'table_start')
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*
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* 'rows' => the number of rows in the table (for 'table_start')
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*
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* 'span' => column span (for 'cell_start')
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*
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* 'attr' => column attribute flag (for 'cell_start')
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*
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* @access public
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*
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* @param array &$matches The array of matches from parse().
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*
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* @return A series of text and delimited tokens marking the different
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* table elements and cell text.
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*
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*/
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function process(&$matches)
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{
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// our eventual return value
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$return = '';
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// the number of columns in the table
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$num_cols = 0;
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// the number of rows in the table
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$num_rows = 0;
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// rows are separated by newlines in the matched text
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$rows = explode("\n", $matches[1]);
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// loop through each row
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foreach ($rows as $row) {
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// increase the row count
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$num_rows ++;
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// start a new row
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$return .= $this->wiki->addToken(
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$this->rule,
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array('type' => 'row_start')
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);
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// cells are separated by double-pipes
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$cell = explode("||", $row);
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// get the number of cells (columns) in this row
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$last = count($cell) - 1;
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// is this more than the current column count?
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// (we decrease by 1 because we never use cell zero)
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if ($last - 1 > $num_cols) {
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// increase the column count
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$num_cols = $last - 1;
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}
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// by default, cells span only one column (their own)
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$span = 1;
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// ignore cell zero, and ignore the "last" cell; cell zero
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// is before the first double-pipe, and the "last" cell is
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// after the last double-pipe. both are always empty.
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for ($i = 1; $i < $last; $i ++) {
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// if there is no content at all, then it's an instance
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// of two sets of || next to each other, indicating a
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// span.
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if ($cell[$i] == '') {
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// add to the span and loop to the next cell
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$span += 1;
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continue;
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} else {
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// this cell has content.
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// find any special "attr"ibute cell markers
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if (substr($cell[$i], 0, 2) == '> ') {
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// right-align
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$attr = 'right';
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$cell[$i] = substr($cell[$i], 2);
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} elseif (substr($cell[$i], 0, 2) == '= ') {
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// center-align
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$attr = 'center';
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$cell[$i] = substr($cell[$i], 2);
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} elseif (substr($cell[$i], 0, 2) == '< ') {
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// left-align
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$attr = 'left';
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$cell[$i] = substr($cell[$i], 2);
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} elseif (substr($cell[$i], 0, 2) == '~ ') {
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$attr = 'header';
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$cell[$i] = substr($cell[$i], 2);
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} else {
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$attr = null;
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}
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// start a new cell...
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$return .= $this->wiki->addToken(
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$this->rule,
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array (
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'type' => 'cell_start',
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'attr' => $attr,
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'span' => $span
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)
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);
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// ...add the content...
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$return .= trim($cell[$i]);
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// ...and end the cell.
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$return .= $this->wiki->addToken(
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$this->rule,
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array (
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'type' => 'cell_end',
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'attr' => $attr,
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'span' => $span
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)
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);
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// reset the span.
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$span = 1;
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}
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}
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// end the row
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$return .= $this->wiki->addToken(
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$this->rule,
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array('type' => 'row_end')
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);
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}
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// wrap the return value in start and end tokens
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$return =
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$this->wiki->addToken(
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$this->rule,
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array(
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'type' => 'table_start',
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'rows' => $num_rows,
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'cols' => $num_cols
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)
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)
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. $return .
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$this->wiki->addToken(
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$this->rule,
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array(
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'type' => 'table_end'
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)
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);
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// we're done!
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return "\n$return\n\n";
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}
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}
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?>
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