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