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206 lines
6.3 KiB
206 lines
6.3 KiB
<?php
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// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
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//
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// All Rights Reserved. See copyright.txt for details and a complete list of authors.
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// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
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// $Id$
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/**
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* HTML diff renderer.
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* This class renders the diff of an HTML page with best effort.
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*/
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include_once("Renderer.php");
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class Text_Diff_Renderer_htmldiff extends Tiki_Text_Diff_Renderer
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{
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public function __construct($context_lines = 0, $words = 0)
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{
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$this->_leading_context_lines = $context_lines;
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$this->_trailing_context_lines = $context_lines;
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$this->_words = $words;
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}
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protected function _startDiff()
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{
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ob_start();
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$this->original = [];
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$this->final = [];
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$this->n = 0;
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$this->rspan = false;
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$this->lspan = false;
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//$this->tracked_tags = array ("table","ul","div");
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$this->tracked_tags = ["table", "ul"];
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}
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protected function _endDiff()
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{
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for ($i = 0; $i <= $this->n; $i++) {
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if ($this->original[$i] != "" and $this->final[$i] != "") {
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echo "<tr><td width='50%' colspan='2' style='vertical-align:top'>" . $this->original[$i] . "</td><td width='50%' colspan='2' style='vertical-align:top'>" . $this->final[$i] . "</td></tr>\n";
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}
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}
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//echo '</table>';
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$val = ob_get_contents();
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ob_end_clean();
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return $val;
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}
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protected function _blockHeader($xbeg, $xlen, $ybeg, $ylen)
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{
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return "$xbeg,$xlen,$ybeg,$ylen";
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}
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protected function _startBlock($header)
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{
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}
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protected function _endBlock()
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{
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}
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protected function _insert_tag($line, $tag, &$span)
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{
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$string = "";
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if ($line != '') {
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if (strstr($line, "<") === false) {
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if ($span === false) {
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$string .= "<span class='$tag'>";
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$span = true;
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}
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$string .= $line;
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} else {
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if ($span === true) {
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$string .= "</span class='fin'>";
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$span = false;
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}
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if (strstr($line, "class=") === false) {
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$string .= preg_replace("#<([^/> ]+)(.*[^/]?)?>#", "<$1 class='$tag' $2>", $line);
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$string = preg_replace("#<br class='(.*)'\s*/>#", "<span class='$1'>↵</span><br class='$1' />", $string);
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} else {
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$string .= preg_replace("#<([^/> ]+)(.*)class=[\"']?([^\"']+)[\"']?(.*[^/]?)?>#", "<$1$2 class='$3 $tag' $4>", $line);
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}
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}
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}
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return $string;
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}
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protected function _count_tags($line, $version)
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{
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preg_match("#<(/?)([^ >]+)#", $line, $out);
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if (count($out) > 1 && in_array($out[2], $this->tracked_tags)) {
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if (isset($this->tags[$version][$out[2]])) {
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if ($out[1] == '/') {
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$this->tags[$version][$out[2]]--;
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} else {
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$this->tags[$version][$out[2]]++;
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}
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}
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}
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}
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protected function _can_break($line)
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{
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if (preg_match("#<(p|h\d|br)#", $line) == 0) {
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return false;
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}
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if (isset($this->tags)) {
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foreach ($this->tags as $v) {
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foreach ($v as $tag) {
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if ($tag != 0) {
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return false;
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}
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}
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}
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}
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return true;
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}
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protected function _lines($lines, $prefix = '', $suffix = '', $type = '')
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{
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static $context = 0;
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switch ($type) {
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case 'context':
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foreach ($lines as $line) {
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if ($context == 0 and $this->_can_break($line)) {
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$context = 1;
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$this->n++;
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}
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$this->_count_tags($line, 'original');
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$this->_count_tags($line, 'final');
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if ($this->lspan === true) {
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$this->original[$this->n] .= "</span>";
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$this->lspan = false;
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}
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if ($this->rspan === true) {
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$this->final[$this->n] .= "</span>";
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$this->rspan = false;
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}
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if (! isset($this->original[$this->n])) {
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$this->original[$this->n] = '';
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}
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$this->original[$this->n] .= "$line";
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if (! isset($this->final[$this->n])) {
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$this->final[$this->n] = '';
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}
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$this->final[$this->n] .= "$line";
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}
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break;
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case 'change-added':
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case 'added':
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foreach ($lines as $line) {
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if ($line != '') {
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$this->_count_tags($line, 'final');
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$this->final[$this->n] .= $this->_insert_tag($line, 'diffadded', $this->rspan);
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$context = 0;
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}
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}
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break;
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case 'deleted':
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case 'change-deleted':
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foreach ($lines as $line) {
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if ($line != '') {
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$this->_count_tags($line, 'original');
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$this->original[$this->n] .= $this->_insert_tag($line, 'diffdeleted', $this->lspan);
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$context = 0;
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}
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}
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break;
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}
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}
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protected function _context($lines)
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{
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$this->_lines($lines, '', '', 'context');
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}
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protected function _added($lines, $changemode = false)
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{
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if ($changemode) {
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$this->_lines($lines, '+', '', 'change-added');
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} else {
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$this->_lines($lines, '+', '', 'added');
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}
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}
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protected function _deleted($lines, $changemode = false)
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{
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if ($changemode) {
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$this->_lines($lines, '-', '', 'change-deleted');
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} else {
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$this->_lines($lines, '-', '', 'deleted');
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}
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}
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protected function _changed($orig, $final)
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{
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$this->_deleted($orig, true);
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$this->_added($final, true);
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}
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}
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