code clean up

.gitignore

@@ -1 +1,2 @@
+/.idea
 /vendor

README.md

@@ -1,12 +1,11 @@
-PHP Diff Class
---------------
+# PHP Diff Class
 
 [![SensioLabsInsight](https://insight.sensiolabs.com/projects/aa609edb-cdb1-45cf-ad51-afbdab48f6a1/mini.png)](https://insight.sensiolabs.com/projects/aa609edb-cdb1-45cf-ad51-afbdab48f6a1) [![Codacy Badge](https://api.codacy.com/project/badge/Grade/db5f8d57b1234502aeb852afc87e0dfe)](https://www.codacy.com/app/leet31337/php-diff)
 
 [![Latest Version](https://img.shields.io/github/release/JBlond/php-diff.svg?style=flat-square&label=Release)](https://github.com/JBlond/php-diff/releases)
 
-Introduction
-------------
+## Introduction
+
 A comprehensive library for generating differences between
 two hashable objects (strings or arrays). Generated differences can be
 rendered in all of the standard formats including:
@@ -19,40 +18,46 @@ The logic behind the core of the diff engine (ie, the sequence matcher)
 is primarily based on the Python difflib package. The reason for doing
 so is primarily because of its high degree of accuracy.
 
-Example Use
------------
+
+## Install
+
+```
+composer require jblond/php-diff
+```
+
+## Example Use
+
 A quick usage example can be found in the example/ directory and under
 example.php.
 
 ![Example Image](readme.png "Example")
 
 ![Example 2 Image](readme2.png "Example2")
 
-Requirements
------------
+## Requirements
+
 - PHP 7.1 or greater
 - PHP Multibyte String 
 
-Merge files using jQuery
-------------------------
+## Merge files using jQuery
+
 Xiphe has build a jQuery plugin with that you can merge the compared
 files. Have a look at [jQuery-Merge-for-php-diff](https://github.com/Xiphe/jQuery-Merge-for-php-diff).
 
-Todo
-----
+## Todo
+
  * Ability to ignore blank line changes
  * 3 way diff support
  * Performance optimizations
 
- Contributors
----------------------
+##  Contributors
+
 Contributors since I forked the repo.
 
 - maxxer
 - Creris
 - jfcherng
 
-License (BSD License)
----------------------
+### License (BSD License)
 
 see [License](LICENSE)

example/a.txt

@@ -14,5 +14,6 @@
 		<pre>
 		另外我覺得那個評價的白色櫃子有點沒有必要欸。外觀我就不說了 ，怎麼連空間都那麼狹隘。不過倒是從這個地方看出所謂的“改革” 😅😅
 		</pre>
+		<p>Do you know in Chinese, "金槍魚罐頭" means tuna can.</p>
 	</body>
 </html>

example/b.txt

@@ -14,6 +14,7 @@
 		<pre>
 		另外我覺得那個評鑑的白色櫃子有點沒有必要欸。外觀我就不說了 ，怎麼連空間都那麼狹隘。不過倒是從這個地方看出所謂的“改革” 😅😅
 		</pre>
+		<p>Do you know in Japanese, "魚の缶詰" means fish can.</p>
 		<p>Just a small amount of new text...</p>
 	</body>
-</html>
+</html>

lib/jblond/Diff.php

@@ -40,24 +40,24 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *
- * @package Diff
+ * @package jblond
  * @author Chris Boulton <[email protected]>
  * @copyright (c) 2009 Chris Boulton
  * @license New BSD License http://www.opensource.org/licenses/bsd-license.php
- * @version 1.9
+ * @version 1.10
  * @link https://github.com/JBlond/php-diff
  */
 class Diff
 {
     /**
      * @var array The "old" sequence to use as the basis for the comparison.
      */
-    private $a = null;
+    private $old = null;
 
     /**
      * @var array The "new" sequence to generate the changes for.
      */
-    private $b = null;
+    private $new = null;
 
     /**
      * @var array Array containing the generated op codes for the differences between the two items.
@@ -83,14 +83,14 @@ class Diff
     /**
      * The constructor.
      *
-     * @param array $a Array containing the lines of the first string to compare.
-     * @param array $b Array containing the lines for the second string to compare.
+     * @param array $oldArray Array containing the lines of the first string to compare.
+     * @param array $newArray Array containing the lines for the second string to compare.
      * @param array $options Array for the options
      */
-    public function __construct(array $a, array $b, array $options = array())
+    public function __construct(array $oldArray, array $newArray, array $options = array())
     {
-        $this->a = $a;
-        $this->b = $b;
+        $this->old = $oldArray;
+        $this->new = $newArray;
 
         if (is_array($options)) {
             $this->options = array_merge($this->defaultOptions, $options);
@@ -122,19 +122,18 @@ public function render($renderer)
      * @param int|null $end The ending number. If not supplied, only the item in $start will be returned.
      * @return array Array of all of the lines between the specified range.
      */
-    public function getA(int $start = 0, $end = null) : array
+    public function getOld(int $start = 0, $end = null) : array
     {
         if ($start == 0 && $end === null) {
-            return $this->a;
+            return $this->old;
         }
 
         if ($end === null) {
-            $length = 1;
-        } else {
-            $length = $end - $start;
+            return array_slice($this->old, $start, 1);
         }
 
-        return array_slice($this->a, $start, $length);
+        $length = $end - $start;
+        return array_slice($this->old, $start, $length);
     }
 
     /**
@@ -147,19 +146,18 @@ public function getA(int $start = 0, $end = null) : array
      * @param int|null $end The ending number. If not supplied, only the item in $start will be returned.
      * @return array Array of all of the lines between the specified range.
      */
-    public function getB(int $start = 0, $end = null) : array
+    public function getNew(int $start = 0, $end = null) : array
     {
         if ($start == 0 && $end === null) {
-            return $this->b;
+            return $this->new;
         }
 
         if ($end === null) {
-            $length = 1;
-        } else {
-            $length = $end - $start;
+            return array_slice($this->new, $start, 1);
         }
 
-        return array_slice($this->b, $start, $length);
+        $length = $end - $start;
+        return array_slice($this->new, $start, $length);
     }
 
     /**
@@ -176,7 +174,7 @@ public function getGroupedOpcodes() : array
             return $this->groupedCodes;
         }
 
-        $sequenceMatcher = new SequenceMatcher($this->a, $this->b, $this->options, null);
+        $sequenceMatcher = new SequenceMatcher($this->old, $this->new, $this->options, null);
         $this->groupedCodes = $sequenceMatcher->getGroupedOpcodes($this->options['context']);
         return $this->groupedCodes;
     }

lib/jblond/Diff/Renderer/Html/HtmlArray.php

@@ -37,17 +37,13 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *
- * @package DiffLib
+ * @package jblond\Diff\Renderer\Html
  * @author Chris Boulton <[email protected]>
  * @copyright (c) 2009 Chris Boulton
  * @license New BSD License http://www.opensource.org/licenses/bsd-license.php
- * @version 1.9
+ * @version 1.10
  * @link https://github.com/JBlond/php-diff
  */
-
-/**
- * Class Diff_Renderer_Html_Array
- */
 class HtmlArray extends RendererAbstract
 {
     /**
@@ -59,62 +55,6 @@ class HtmlArray extends RendererAbstract
         'title_b' => 'New Version',
     );
 
-    /**
-    * From https://gist.github.com/stemar/8287074
-    * @param string $string The input string.
-    * @param string $replacement The replacement string.
-    * @param int $start If start is positive, the replacing will begin at the start'th offset into string.
-    * If start is negative, the replacing will begin at the start'th character from the end of string.
-    * @param int|null $length If given and is positive, it represents the length of the portion of string which is to
-     * be replaced. If it is negative, it represents the number of characters from the end of string at which to
-     * stop replacing. If it is not given, then it will default to strlen( string ); i.e. end the replacing at the
-     * end of string. Of course, if length is zero then this function will have the effect of inserting replacement
-     * into string at the given start offset.
-    * @return string|array The result string is returned. If string is an array then array is returned.
-    */
-    public function mbSubstrReplace(string $string, string $replacement, int $start, $length = null)
-    {
-        if (is_array($string)) {
-            $num = count($string);
-            // $replacement
-            if (is_array($replacement)) {
-                $replacement = array_slice($replacement, 0, $num);
-            } else {
-                $replacement = array_pad(array($replacement), $num, $replacement);
-            }
-
-            // $start
-            if (is_array($start)) {
-                $start = array_slice($start, 0, $num);
-                foreach ($start as $key => $value) {
-                    $start[$key] = is_int($value) ? $value : 0;
-                }
-            } else {
-                $start = array_pad(array($start), $num, $start);
-            }
-            // $length
-            if (!isset($length)) {
-                $length = array_fill(0, $num, 0);
-            } elseif (is_array($length)) {
-                $length = array_slice($length, 0, $num);
-                foreach ($length as $key => $value) {
-                    $length[$key] = isset($value) ? (is_int($value) ? $value : $num) : 0;
-                }
-            } else {
-                $length = array_pad(array($length), $num, $length);
-            }
-            // Recursive call
-            return array_map(array($this, 'mbSubstrReplace'), $string, $replacement, $start, $length);
-        }
-        preg_match_all('/./us', (string)$string, $smatches);
-        preg_match_all('/./us', (string)$replacement, $rmatches);
-        if ($length === null) {
-            $length = mb_strlen($string);
-        }
-        array_splice($smatches['0'], $start, $length, $rmatches[0]);
-        return join($smatches['0']);
-    }
-
     /**
      * @param string|array $changes
      * @param SideBySide|Inline $object
@@ -175,8 +115,8 @@ public function render()
         // As we'll be modifying a & b to include our change markers,
         // we need to get the contents and store them here. That way
         // we're not going to destroy the original data
-        $a = $this->diff->getA();
-        $b = $this->diff->getB();
+        $a = $this->diff->getOld();
+        $b = $this->diff->getNew();
 
         $changes = array();
         $opCodes = $this->diff->getGroupedOpcodes();
@@ -281,9 +221,19 @@ private function getChangeExtent(string $fromLine, string $toLine)
     protected function formatLines(array $lines) : array
     {
         if ($this->options['tabSize'] !== false) {
-            $lines = array_map(array($this, 'ExpandTabs'), $lines);
+            $lines = array_map(
+                function ($item) {
+                    return $this->expandTabs($item);
+                },
+                $lines
+            );
         }
-        $lines = array_map(array($this, 'HtmlSafe'), $lines);
+        $lines = array_map(
+            function ($item) {
+                return $this->htmlSafe($item);
+            },
+            $lines
+        );
         foreach ($lines as &$line) {
             $line = preg_replace_callback('# ( +)|^ #', array($this, 'fixSpaces'), $line);
         }

lib/jblond/Diff/Renderer/Html/Inline.php

@@ -35,17 +35,13 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *
- * @package DiffLib
+ * @package jblond\Diff\Renderer\Html
  * @author Chris Boulton <[email protected]>
  * @copyright (c) 2009 Chris Boulton
  * @license New BSD License http://www.opensource.org/licenses/bsd-license.php
- * @version 1.9
+ * @version 1.10
  * @link https://github.com/JBlond/php-diff
  */
-
-/**
- * Class Diff_Renderer_Html_Inline
- */
 class Inline extends HtmlArray
 {
     /**

lib/jblond/Diff/Renderer/Html/SideBySide.php

@@ -35,17 +35,13 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *
- * @package DiffLib
+ * @package jblond\Diff\Renderer\Html
  * @author Chris Boulton <[email protected]>
  * @copyright (c) 2009 Chris Boulton
  * @license New BSD License http://www.opensource.org/licenses/bsd-license.php
- * @version 1.9
+ * @version 1.10
  * @link https://github.com/JBlond/php-diff
  */
-
-/**
- * Class Diff_Renderer_Html_SideBySide
- */
 class SideBySide extends HtmlArray
 {
     /**

lib/jblond/Diff/Renderer/RendererAbstract.php

@@ -35,11 +35,11 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *
- * @package DiffLib
+ * @package jblond\Diff\Renderer
  * @author Chris Boulton <[email protected]>
  * @copyright (c) 2009 Chris Boulton
  * @license New BSD License http://www.opensource.org/licenses/bsd-license.php
- * @version 1.9
+ * @version 1.10
  * @link https://github.com/JBlond/php-diff
  */
 abstract class RendererAbstract