includes/diffengine/Renderer/inline.php
author Dan
Thu, 17 Jan 2008 02:03:33 -0500
changeset 349 fdaf9070566c
parent 1 fe660c52c48f
child 1227 bdac73ed481e
permissions -rw-r--r--
More progress on the installer. At this point it can install and import the language, but does not rename config files. Still much work to be done, most notably localization and creation of MySQL users and databases.
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<?php
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/**
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 * "Inline" diff renderer.
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 *
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 * This class renders diffs in the Wiki-style "inline" 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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 * @package Text_Diff
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 */
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class Text_Diff_Renderer_inline 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 = 10000;
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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 = 10000;
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    /**
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     * Prefix for inserted text.
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     */
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    var $_ins_prefix = '<ins>';
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    /**
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     * Suffix for inserted text.
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     */
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    var $_ins_suffix = '</ins>';
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    /**
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     * Prefix for deleted text.
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     */
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    var $_del_prefix = '<del>';
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    /**
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     * Suffix for deleted text.
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     */
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    var $_del_suffix = '</del>';
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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 $_split_level = 'words';
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    function _blockHeader($xbeg, $xlen, $ybeg, $ylen)
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    {
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        return $this->_block_header;
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    }
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    function _startBlock($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("\n", $lines) . "\n";
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        }
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    }
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    function _added($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, $final)
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    {
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        /* If we've already split on words, don't try to do so again - just
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         * display. */
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        if ($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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            return $prefix . $this->_deleted($orig) . $this->_added($final);
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        }
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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. */
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        return str_replace($nl, "\n", $renderer->render($diff)) . "\n";
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    }
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    function _splitOnWords($string, $newlineEscape = "\n")
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    {
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        $words = array();
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        $length = strlen($string);
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        $pos = 0;
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        while ($pos < $length) {
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            // Eat a word with any preceding whitespace.
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            $spaces = strspn(substr($string, $pos), " \n");
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            $nextpos = strcspn(substr($string, $pos + $spaces), " \n");
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            $words[] = str_replace("\n", $newlineEscape, substr($string, $pos, $spaces + $nextpos));
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            $pos += $spaces + $nextpos;
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        }
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        return $words;
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    }
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    function _encode(&$string)
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    {
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        $string = htmlspecialchars($string);
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    }
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}