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<?php
/**
* "Inline" diff renderer.
*
* This class renders diffs in the Wiki-style "inline" format.
*
* $Horde: framework/Text_Diff/Diff/Renderer/inline.php,v 1.3 2004/10/13 09:30:20 jan Exp $
*
* @author Ciprian Popovici
* @package Text_Diff
*/
class Text_Diff_Renderer_inline extends Text_Diff_Renderer {
/**
* Number of leading context "lines" to preserve.
*/
var $_leading_context_lines = 10000;
/**
* Number of trailing context "lines" to preserve.
*/
var $_trailing_context_lines = 10000;
/**
* Prefix for inserted text.
*/
var $_ins_prefix = '<ins>';
/**
* Suffix for inserted text.
*/
var $_ins_suffix = '</ins>';
/**
* Prefix for deleted text.
*/
var $_del_prefix = '<del>';
/**
* Suffix for deleted text.
*/
var $_del_suffix = '</del>';
/**
* Header for each change block.
*/
var $_block_header = '';
/**
* What are we currently splitting on? Used to recurse to show word-level
* changes.
*/
var $_split_level = 'lines';
function _lines($lines, $prefix = ' ')
{
if ($this->_split_level == 'words') {
echo implode($lines, ' ');
} else {
echo implode($lines, "\n") . "\n";
}
}
function _blockHeader($xbeg, $xlen, $ybeg, $ylen)
{
return $this->_block_header;
}
function _startBlock($header)
{
echo $header;
}
function _added($lines)
{
array_unshift($lines, $this->_ins_prefix);
array_push($lines, $this->_ins_suffix);
$this->_lines($lines);
}
function _deleted($lines)
{
array_unshift($lines, $this->_del_prefix);
array_push($lines, $this->_del_suffix);
$this->_lines($lines);
}
function _changed($orig, $final)
{
/* If we've already split on words, don't try to do so again - just
* display. */
if ($this->_split_level == 'words') {
$this->_deleted($orig);
$this->_added($final);
echo "\n";
return;
}
$text1 = implode("\n", $orig);
$text2 = implode("\n", $final);
/* Pad to make sure we can split on word boundaries. */
$text1 = str_replace("\n", " \n", $text1);
$text2 = str_replace("\n", " \n", $text2);
/* Non-printing newline marker. */
$nl = "\0";
/* Save newlines. */
$text1 = str_replace("\n", $nl, $text1);
$text2 = str_replace("\n", $nl, $text2);
/* Create the diff, splitting on word boundaries (loosely defined as
* spaces). */
$diff = &new Text_Diff(explode(' ', $text1),
explode(' ', $text2));
/* Get the diff in inline format.
* FIXME: should propogate other parameters here too. */
$renderer = &new Text_Diff_Renderer_inline(array('split_level' => 'words'));
/* Restore newlines and display the result. */
echo str_replace($nl, "\n", $renderer->render($diff));
}
}
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