Htmldiff.php | searchcode

/src/system/application/libraries/Htmldiff.php

https://bitbucket.org/seezoo/seezoo/
PHP | 307 lines | 210 code | 31 blank | 66 comment | 60 complexity | 2dca030b4b0b9737a823d70433dc60af MD5 | raw file
Possible License(s): GPL-2.0

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

/**
 * Replacement of htmldiff.py
 *
 * Requirement:
 *   PEAR::Text_Diff
 *   OS diff command
 *   shell_exec()
 *
 * @author     Kenji Suzuki <kenji@club.h14m.org> Thanks!
 * @copyright  Copyright (c) 2009 Kenji Suzuki
 * @modified at 2010/10/29 Yoshiaki Sugimoto <neo.yoshiaki.sugimoto@gmail.com>
 *
 */

class Htmldiff
{
	protected $past_version;
	protected $latest_version;
	
	public function __construct() {
		require_once APPPATH . 'libraries/HtmlDiff/Diff.php';
		require_once APPPATH . 'libraries/HtmlDiff/Diff/Renderer.php';
		require_once APPPATH . 'libraries/HtmlDiff/Diff/Renderer/unified.php';
	}
	
	/**
	 * additional method getDiffFromFile
	 * get diff from two files
	 * @param unknown_type $file1
	 * @param unknown_type $file2
	 */
	public function getDiffFromFile($file1, $file2)
	{
		/* Make sure both files exist. */
		if (!is_readable($file1)) {
			return "$file1 not found or not readable.";
		}
		if (!is_readable($file2)) {
			return "$file2 not found or not readable.";
		}

		/* Load the lines of each file. */
		$lines1 = file($file1);
		$lines2 = file($file2);
		
		return $this->_getDiff($lines1, $lines2);
	}
	
	/**
	 * additionalmethod getDiffFromString
	 * get diff from outputed string daa 
	 * @param unknown_type $text1
	 * @param unknown_type $text2
	 */
	public function getDiffFromString($str1, $str2)
	{
		$str1 = explode("\n", $str1);
		$str2 = explode("\n", $str2);
		return $this->_getDiff($str1, $str2);
	}
	
	/**
	 * alias to getDiff public method
	 * @param unknown_type $text1
	 * @param unknown_type $text2
	 */
	public function getDiff($file1, $file2)
	{
		return $this->getDiffFromFile($file1, $file2);
	}
	
	/**
	 * getDiff from URI parameter files
	 * Enter description here ...
	 * @param unknown_type $text1
	 * @param unknown_type $text2
	 */
	function getDiffFromURIs($uri1, $uri2)
	{
		/* Make sure both uris strict format. */
		if ( ! preg_match('/^http/', $uri1) )
		{
			return "$uri1 is illegal URI format.";
		}
		if ( ! preg_match('/^http/', $uri2) )
		{
			return "$uri2 is illegal URI format.";
		}
				
		$lines1 = @file($uri1);
		$lines2 = @file($uri2);
		
		if ( ! $lines1 )
		{
			return  "$uri1 is not found.";
		}
		if ( ! $lines2 )
		{
			return  "$uri2 is not found.";
		}
		
		return $this->_getDiff($lines1, $lines2);
	}

	protected function _getDiff($text1, $text2) {

		// this process move to "getDiffFromFile" method.
		///* Make sure both files exist. */
		//if (!is_readable($file1)) {
		//	return "$file1 not found or not readable.";
		//}
		//if (!is_readable($file2)) {
		//	return "$file2 not found or not readable.";
		//}
		//
		///* Load the lines of each file. */
		//$lines1 = file($file1);
		//$lines2 = file($file2);
		
		$lines1 = $this->normailze($text1);
		$lines2 = $this->normailze($text2);

		/* Create the Diff object. */
		// 'shell' means to use diff command, we select it because it's smarter than 'native' PHP diff engine.
		$diff = new Text_Diff('auto', array($lines1, $lines2));

		/* Get the Diff result */
		$diffResult = $diff->getDiff();
		
		$version_txt = 'バージョン' . $this->past_version . '&nbsp;→&nbsp;' . $this->latest_version . '&nbsp;';

		$out = '';

		foreach ($diffResult as $index => $op) {
			if ($op instanceof Text_Diff_Op_copy) {
				// equal
				// orig is equl to final
				foreach ($op->orig as $line) {
					$out .= $line . PHP_EOL;
				}
			} else if ($op instanceof Text_Diff_Op_add) {
				// insert
				// orig is empty, final has content
				$out .= '<div class="diff" style="background-color:#87e7a2">';
				$out .= '<p style="text-align:left;font-size:12px">' . $version_txt . 'で追加</p>';
				foreach ($op->final as $line) {
					$out .= $line . PHP_EOL;
				}
				$out .= '</div>';
			} else if ($op instanceof Text_Diff_Op_delete) {
				// delete
				// orig has content, final is empty
				$out .= '<div class="diff" style="background-color:#ed9492">';
				$out .= '<p style="text-align:left;font-size:12px">' . $version_txt . 'で削除</p>';
				foreach ($op->orig as $line) {
					$out .= $line . PHP_EOL;
				}
				$out .= '</div>';
			} else if ($op instanceof Text_Diff_Op_change) {
				// replace
				$orig = array();
				foreach ($op->orig as $line) {
					$len = mb_strlen($line);
					if ($len > 0 && $line[0] == '<') {
						$orig[] = $line;
					} else {
						for ($i = 0; $i < $len; $i++) {
							$orig[] = mb_substr($line, $i, 1);
						}
						$orig[] = PHP_EOL;
					}
				}
				$final = array();
				foreach ($op->final as $line) {
					$len = mb_strlen($line);
					if ($len > 0 && $line[0] == '<') {
						$orig[] = $line;
					} else {
						for ($i = 0; $i < $len; $i++) {
							$final[] = mb_substr($line, $i, 1);
						}
						$final[] = PHP_EOL;
					}
				}

				$diffInChange = new Text_Diff('auto', array($orig, $final));
				$diffInChangeResult = $diffInChange->getDiff();

				foreach ($diffInChangeResult as $indexInChange => $opInChange) {
					if ($opInChange instanceof Text_Diff_Op_copy) {
						// equal
						foreach ($opInChange->orig as $line) {
							if ($line == '') {
								$line = PHP_EOL;
							}
							$out .= $line;
						}
					} else if ($opInChange instanceof Text_Diff_Op_add) {
						// insert
						$out .= '<div class="diff" style="background-color:#87e7a2">';
						$out .= '<p style="text-align:left;font-size:12px">' . $version_txt . 'で追加</p>';
						foreach ($opInChange->final as $line) {
							if ($line == '') {
								$line = PHP_EOL;
							}
							$out .= $line;
						}
						$out .= '</div>';
					} else if ($opInChange instanceof Text_Diff_Op_delete) {
						// delete
						$out .= '<div class="diff" style="backgorund-color:#ed9492">';
						$out .= '<p style="text-align:left;font-size:12px">' . $version_txt . 'で削除</p>';
						foreach ($opInChange->orig as $line) {
							if ($line == '') {
								$line = PHP_EOL;
							}
							$out .= $line;
						}
						$out .= '</del>';
					} else if ($op instanceof Text_Diff_Op_change) {
						// replace
						$out .= '<div class="diff modified" style="background-color:#ccc">';
						$out .= '<p style="text-align:left;font-size:12px">' . $version_txt . 'で削除</p>';
						foreach ($opInChange->orig as $line) {
							if ($line == '') {
								$line = PHP_EOL;
							}
							$out .= $line;
						}
						$out .= '</div><div class="diff modified" style="background-color:#00084c4"><p style="text-align:left;font-size:12px">' . $version_txt . 'で追加</p>';;
						foreach ($opInChange->final as $line) {
							if ($line == '') {
								$line = PHP_EOL;
							}
							$out .= $line;
						}
						$out .= '</div>';
					} else {
						printf("WARNING: unknown operation\n");
					}
				}
			} else {
				printf("WARNING: unknown operation\n");
			}
		}

		return $out;
	}

	private function normailze($lines) {
		$mode = 'char';
		$out = array();

		foreach ($lines as $line) {
			$len = strlen($line);
			for ($i = 0; $i < $len; $i++) {
				$c = $line[$i];

				if ($mode == 'tag') {
					if ($c == '>') {
						$tmp = array_pop($out);
						$out[] = $tmp . $c;
						$out[] = '';
						$mode = 'char';
					} else {
						$tmp = array_pop($out);
						$out[] = $tmp . $c;
					}
				}
				else if ($mode == 'char') {
					if ($c == '<') {
						$out[] = $c;
						$mode = 'tag';
					} else {
						if ($c != PHP_EOL) {
							$tmp = array_pop($out);
						} else {
							$tmp = '';
						}
						$out[] = $tmp . $c;
					}
				}
			}
		}

		$html = array();
		foreach ($out as $line) {
			$line = trim($line);
			if ($line != '') {
				$html[] = $line . PHP_EOL;
			}
		}

		return $html;
	}
	
	// version ID setter
	public function set_versions($past = 0, $latest = 0)
	{
		$this->past_version = $past;
		$this->latest_version = $latest;
	}
	
}