Add a HTML inline diff renderer

src/App/Tracker/DiffRenderer/Html/Inline.php

@@ -0,0 +1,219 @@
+<?php
+/**
+ * Inline HTML diff generator for PHP DiffLib.
+ *
+ * PHP version 5
+ *
+ * Copyright (c) 2009 Chris Boulton <chris.boulton@interspire.com>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  - Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *  - Neither the name of the Chris Boulton nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @copyright  (c) 2009 Chris Boulton
+ * @license    New BSD License http://www.opensource.org/licenses/bsd-license.php
+ * @link       http://github.com/chrisboulton/php-diff
+ */
+
+namespace App\Tracker\DiffRenderer\Html;
+
+use Adaptive\Diff\Renderer\Html\ArrayRenderer;
+
+/**
+ * Class Inline
+ *
+ * @since  1.0
+ */
+class Inline extends ArrayRenderer
+{
+	private $showLineNumbers = true;
+
+	private $showHeader = true;
+
+	/**
+	 * Render a and return diff with changes between the two sequences
+	 * displayed inline (under each other)
+	 *
+	 * @return string The generated inline diff.
+	 */
+	public function render()
+	{
+		$changes = parent::render();
+		$html = '';
+
+		if (empty($changes))
+		{
+			return $html;
+		}
+
+		$html .= '<table class="Differences DifferencesInline">';
+
+		if ($this->showHeader)
+		{
+			$html .= '<thead>';
+			$html .= '<tr>';
+
+			if ($this->showLineNumbers)
+			{
+				$html .= '<th>' . g11n3t('Old') . '</th>';
+				$html .= '<th>' . g11n3t('New') . '</th>';
+			}
+
+			$html .= '<th>' . g11n3t('Differences') . '</th>';
+			$html .= '</tr>';
+			$html .= '</thead>';
+		}
+
+		foreach ($changes as $i => $blocks)
+		{
+			// If this is a separate block, we're condensing code so output ...,
+			// indicating a significant portion of the code has been collapsed as it is the same
+			if ($i > 0)
+			{
+				$html .= '<tbody class="Skipped">';
+				$html .= '<th>&hellip;</th>';
+
+				if ($this->showLineNumbers)
+				{
+					$html .= '<th>&hellip;</th>';
+					$html .= '<td>&nbsp;</td>';
+				}
+
+				$html .= '</tbody>';
+			}
+
+			foreach ($blocks as $change)
+			{
+				$html .= '<tbody class="Change' . ucfirst($change['tag']) . '">';
+
+				// Equal changes should be shown on both sides of the diff
+
+				if ($change['tag'] == 'equal')
+				{
+					foreach ($change['base']['lines'] as $no => $line)
+					{
+						$html .= '<tr>';
+
+						if ($this->showLineNumbers)
+						{
+							$html .= '<th>' . ($change['base']['offset'] + $no + 1) . '</th>';
+							$html .= '<th>' . ($change['changed']['offset'] + $no + 1) . '</th>';
+						}
+
+						$html .= '<td class="Left">' . $line . '</td>';
+						$html .= '</tr>';
+					}
+				}
+				// Added lines only on the right side
+				elseif ($change['tag'] == 'insert')
+				{
+					foreach ($change['changed']['lines'] as $no => $line)
+					{
+						$html .= '<tr>';
+
+						if ($this->showLineNumbers)
+						{
+							$html .= '<th>&nbsp;</th>';
+							$html .= '<th>' . ($change['changed']['offset'] + $no + 1) . '</th>';
+						}
+
+						$html .= '<td class="Right"><ins>' . $line . '</ins>&nbsp;</td>';
+						$html .= '</tr>';
+					}
+				}
+				// Show deleted lines only on the left side
+				elseif ($change['tag'] == 'delete')
+				{
+					foreach ($change['base']['lines'] as $no => $line)
+					{
+						$html .= '<tr>';
+
+						if ($this->showLineNumbers)
+						{
+							$html .= '<th>' . ($change['base']['offset'] + $no + 1) . '</th>';
+							$html .= '<th>&nbsp;</th>';
+						}
+
+						$html .= '<td class="Left"><del>' . $line . '</del>&nbsp;</td>';
+						$html .= '</tr>';
+					}
+				}
+				// Show modified lines on both sides
+				elseif ($change['tag'] == 'replace')
+				{
+					foreach ($change['base']['lines'] as $no => $line)
+					{
+						$html .= '<tr>';
+
+						if ($this->showLineNumbers)
+						{
+							$html .= '<th>' . ($change['base']['offset'] + $no + 1) . '</th>';
+							$html .= '<th>&nbsp;</th>';
+						}
+
+						$html .= '<td class="Left"><span>' . $line . '</span></td>';
+						$html .= '</tr>';
+					}
+
+					foreach ($change['changed']['lines'] as $no => $line)
+					{
+						$html .= '<tr>';
+
+						if ($this->showLineNumbers)
+						{
+							$html .= '<th>&nbsp;</th>';
+							$html .= '<th>' . ($change['changed']['offset'] + $no + 1) . '</th>';
+						}
+
+						$html .= '<td class="Right"><span>' . $line . '</span></td>';
+						$html .= '</tr>';
+					}
+				}
+
+				$html .= '</tbody>';
+			}
+		}
+
+		$html .= '</table>';
+
+		return $html;
+	}
+
+	/**
+	 * @param boolean $showLineNumbers
+	 */
+	public function setShowLineNumbers($showLineNumbers)
+	{
+		$this->showLineNumbers = (bool) $showLineNumbers;
+	}
+
+	/**
+	 * @param boolean $showHeader
+	 */
+	public function setShowHeader($showHeader)
+	{
+		$this->showHeader = (bool) $showHeader;
+	}
+}