includes/diffengine/Renderer/xhtml.php
author Dan Fuhry <dan@enanocms.org>
Wed, 25 Apr 2012 02:03:38 -0400
changeset 1361 26e80700ff1d
parent 1227 bdac73ed481e
permissions -rw-r--r--
Small change to generation time formatting to make all pages the same time. Makes apachebench not screw up.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<?php
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/**
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 * XHTML diff renderer.
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 *
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 * This class renders diffs in XHTML format.
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 *
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 * $Horde: framework/Text_Diff/Diff/Renderer/inline.php,v 1.16 2006/01/08 00:06:57 jan Exp $
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 *
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 * @author  Ciprian Popovici
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 * @author  Dan Fuhry
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 * @package Text_Diff
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 */
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class Text_Diff_Renderer_xhtml extends Text_Diff_Renderer {
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		/**
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 		* Number of leading context "lines" to preserve.
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 		*/
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		var $_leading_context_lines = 5;
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		/**
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 		* Number of trailing context "lines" to preserve.
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 		*/
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		var $_trailing_context_lines = 3;
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		/**
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 		* Prefix for inserted text.
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 		*/
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		var $_ins_prefix = "<!-- Start added text -->\n<tr><td style='width: 0px;'>+</td><td class=\"diff-added\" style='width: 100%;'>";
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		/**
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 		* Suffix for inserted text.
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 		*/
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		var $_ins_suffix = "</td></tr>\n<!-- End added text -->\n\n";
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		/**
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 		* Prefix for deleted text.
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 		*/
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		var $_del_prefix = "<!-- Start deleted text -->\n<tr><td style='width: 0px;'>-</td><td class=\"diff-deleted\" style='width: 100%;'>";
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		/**
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 		* Suffix for deleted text.
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 		*/
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		var $_del_suffix = "</td></tr>\n<!-- End deleted text -->\n\n";
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		/**
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 		* Header for each change block.
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 		*/
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		var $_block_header = '';
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		/**
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 		* What are we currently splitting on? Used to recurse to show word-level
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 		* changes.
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 		*/
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		var $_split_level = 'lines';
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		function _blockHeader($xbeg, $xlen, $ybeg, $ylen)
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		{
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			return "<!-- Start block -->\n<tr><td colspan='2' class='diff-block'>Line $xbeg: {$this->_block_header}</td></tr>";
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		}
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		function _startBlock($header)
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		{
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				return $header;
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		}
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		function _lines($lines, $prefix = ' ', $encode = true)
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		{
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				if ($encode) {
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						array_walk($lines, array(&$this, '_encode'));
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				}
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				if ($this->_split_level == 'words') {
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						return implode('', $lines);
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				} else {
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						return implode("<br />", $lines) . "\n";
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				}
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		}
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		function _added($lines)
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		{
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				array_walk($lines, array(&$this, '_encode'));
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				$lines[0] = $this->_ins_prefix . $lines[0];
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				$lines[count($lines) - 1] .= $this->_ins_suffix;
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				return $this->_lines($lines, ' ', false);
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		}
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		function _deleted($lines, $words = false)
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		{
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				array_walk($lines, array(&$this, '_encode'));
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				$lines[0] = $this->_del_prefix . $lines[0];
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				$lines[count($lines) - 1] .= $this->_del_suffix;
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				return $this->_lines($lines, ' ', false);
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		}
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		function _context($lines)
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		{
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				return "<!-- Start context -->\n<tr><td></td><td class=\"diff-context\">".$this->_lines($lines).'</td></tr>'."\n<!-- End context -->\n\n";
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		}
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		function _changed($orig, $final)
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		{
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				/* If we've already split on words, don't try to do so again - just display. */ 
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				if ($this->_split_level == 'words') {
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						$prefix = '';
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						while ($orig[0] !== false && $final[0] !== false &&
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 									substr($orig[0], 0, 1) == ' ' &&
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 									substr($final[0], 0, 1) == ' ') {
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								$prefix .= substr($orig[0], 0, 1);
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								$orig[0] = substr($orig[0], 1);
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								$final[0] = substr($final[0], 1);
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						}
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						$ret = $prefix . $this->_deleted($orig) . $this->_added($final) . "\n";
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						//echo 'DEBUG:<pre>'.htmlspecialchars($ret).'</pre>';
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						return $ret;
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				}
1
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				$text1 = implode("\n", $orig);
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				$text2 = implode("\n", $final);
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				/* Non-printing newline marker. */
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				$nl = "\0";
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				/* We want to split on word boundaries, but we need to
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 				* preserve whitespace as well. Therefore we split on words,
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 				* but include all blocks of whitespace in the wordlist. */
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				$diff = &new Text_Diff($this->_splitOnWords($text1, $nl),
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 															$this->_splitOnWords($text2, $nl));
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				/* Get the diff in inline format. */
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				$renderer = &new Text_Diff_Renderer_inline(array_merge($this->getParams(),
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 																															array('split_level' => 'words')));
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				/* Run the diff and get the output. */
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				$ret = str_replace($nl, "<br />", $renderer->render($diff));
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				//echo 'DEBUG:<pre>'.htmlspecialchars($ret).'</pre>';
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				return $ret . "\n";
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		}
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		function _splitOnWords($string, $newlineEscape = "<br />")
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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		{
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				$words = array();
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				$length = strlen($string);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				$pos = 0;
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				while ($pos < $length) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						// Eat a word with any preceding whitespace.
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						$spaces = strspn(substr($string, $pos), " \n");
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						$nextpos = strcspn(substr($string, $pos + $spaces), " \n");
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   150
						$words[] = str_replace("\n", $newlineEscape, substr($string, $pos, $spaces + $nextpos));
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						$pos += $spaces + $nextpos;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				}
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				return $words;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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		}
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		function _encode(&$string)
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		{
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				$string = htmlspecialchars($string);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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		}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   161
		
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		/**
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 		* Renders a diff.
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 		*
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 		* @param Text_Diff $diff  A Text_Diff object.
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 		*
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 		* @return string  The formatted output.
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 		*/
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   169
		
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		function render($diff)
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		{
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				$xi = $yi = 1;
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				$block = false;
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				$context = array();
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				$nlead = $this->_leading_context_lines;
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				$ntrail = $this->_trailing_context_lines;
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				$output = $this->_startDiff();
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				$diffs = $diff->getDiff();
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				foreach ($diffs as $i => $edit) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						if (is_a($edit, 'Text_Diff_Op_copy')) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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								if (is_array($block)) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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										$keep = $i == count($diffs) - 1 ? $ntrail : $nlead + $ntrail;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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										if (count($edit->orig) <= $keep) {
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												$block[] = $edit;
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										} else {
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												if ($ntrail) {
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														$context = array_slice($edit->orig, 0, $ntrail);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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														$block[] = &new Text_Diff_Op_copy($context);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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												}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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												$bk = $this->_block($x0, $ntrail + $xi - $x0,
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																						$y0, $ntrail + $yi - $y0,
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																						$block);
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												$output .= $bk;
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												$block = false;
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										}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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								}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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								$context = $edit->orig;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						} else {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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								if (!is_array($block)) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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										$context = array_slice($context, count($context) - $nlead);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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										$x0 = $xi - count($context);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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										$y0 = $yi - count($context);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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										$block = array();
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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										if ($context) {
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												$block[] = &new Text_Diff_Op_copy($context);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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										}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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								}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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								$block[] = $edit;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						}
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1227
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						if ($edit->orig) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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								$xi += count($edit->orig);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						if ($edit->final) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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								$yi += count($edit->final);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				}
1
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1227
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				if (is_array($block)) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						$bk = $this->_block($x0, $xi - $x0,
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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																$y0, $yi - $y0,
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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																$block);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						$output .= $bk;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				}
1
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1227
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				$final = $output . $this->_endDiff();
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				if ($final == '') $final = '<tr><td class="diff-block">No differences.</td></tr>';
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				//$final = preg_replace('#('.preg_quote($this->_ins_suffix).'|'.preg_quote($this->_del_suffix).')(.+?)('.preg_quote($this->_ins_prefix).'|'.preg_quote($this->_ins_suffix).')#', '\\1<tr><td></td><td class="diff-context>\\2</td></tr>\\3', $final);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				return '<table class="diff">'.$final.'</table>'."\n\n";
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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		}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   234
		
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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		function _block($xbeg, $xlen, $ybeg, $ylen, &$edits)
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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		{
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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				$output = $this->_startBlock($this->_blockHeader($xbeg, $xlen, $ybeg, $ylen));
1
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1227
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   239
				foreach ($edits as $edit) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						switch (strtolower(get_class($edit))) {
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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						case 'text_diff_op_copy':
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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								$output .= $this->_context($edit->orig);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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								break;
1
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1227
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   245
						case 'text_diff_op_add':
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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								$output .= $this->_added($edit->final);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   247
								break;
1
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1227
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   249
						case 'text_diff_op_delete':
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   250
								$output .= $this->_deleted($edit->orig);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   251
								break;
1
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1227
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   253
						case 'text_diff_op_change':
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   254
								$output .= $this->_changed($edit->orig, $edit->final);
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   255
								break;
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   256
						}
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
   257
				}
1
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1227
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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   259
				return $output . $this->_endBlock();
bdac73ed481e Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
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diff changeset
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		}
1
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}