lochmueller / sourceopt

Classes/Service/CleanHtmlService.php

Indentation +513 added lines, -513 removed lines

@@ -17,517 +17,517 @@
 class CleanHtmlService implements SingletonInterface
 {
 
-    /**
-     * Enable Debug comment in footer
-     *
-     * @var boolean
-     */
-    protected $debugComment = false;
-
-    /**
-     * Format Type
-     *
-     * @var integer
-     */
-    protected $formatType = 0;
-
-    /**
-     * Tab character
-     *
-     * @var string
-     */
-    protected $tab = "\t";
-
-    /**
-     * Newline character
-     *
-     * @var string
-     */
-    protected $newline = "\n";
-
-    /**
-     * Configured extra header comment
-     *
-     * @var string
-     */
-    protected $headerComment = '';
-
-    /**
-     * Empty space char
-     * @var string
-     */
-    protected $emptySpaceChar = ' ';
-
-    /**
-     * Set variables based on given config
-     *
-     * @param array $config
-     *
-     * @return void
-     */
-    public function setVariables(array $config)
-    {
-        // Set newline based on OS
-        if (Environment::isWindows()) {
-            $this->newline = "\r\n";
-        } else {
-            $this->newline = "\n";
-        }
-
-        if (!empty($config)) {
-            if ($config['formatHtml'] && is_numeric($config['formatHtml'])) {
-                $this->formatType = (int)$config['formatHtml'];
-            }
-
-            if ($config['formatHtml.']['tabSize'] && is_numeric($config['formatHtml.']['tabSize'])) {
-                $this->tab = str_pad('', $config['formatHtml.']['tabSize'], ' ');
-            }
-
-            if (isset($config['formatHtml.']['debugComment'])) {
-                $this->debugComment = (bool)$config['formatHtml.']['debugComment'];
-            }
-
-            if (isset($config['headerComment'])) {
-                $this->headerComment = $config['headerComment'];
-            }
-
-            if (isset($config['dropEmptySpaceChar']) && (bool)$config['dropEmptySpaceChar']) {
-                $this->emptySpaceChar = '';
-            }
-        }
-    }
-
-    /**
-     * Clean given HTML with formatter
-     *
-     * @param string $html
-     * @param array $config
-     *
-     * @return string
-     */
-    public function clean($html, $config = [])
-    {
-        if (!empty($config)) {
-            if ((bool)$config['enabled'] === false) {
-                return $html;
-            }
-
-            $this->setVariables($config);
-        }
-
-        $manipulations = [];
-
-        if (isset($config['removeGenerator']) && (bool)$config['removeGenerator']) {
-            $manipulations['removeGenerator'] = GeneralUtility::makeInstance(RemoveGenerator::class);
-        }
-
-        if (isset($config['removeComments']) && (bool)$config['removeComments']) {
-            $manipulations['removeComments'] = GeneralUtility::makeInstance(RemoveComments::class);
-        }
-
-        if (isset($config['removeBlurScript']) && (bool)$config['removeBlurScript']) {
-            $manipulations['removeBlurScript'] = GeneralUtility::makeInstance(RemoveBlurScript::class);
-        }
-
-        if (!empty($this->headerComment)) {
-            $this->includeHeaderComment($html);
-        }
-
-        foreach ($manipulations as $key => $manipulation) {
-            /** @var ManipulationInterface $manipulation */
-            $configuration = isset($config[$key . '.']) && is_array($config[$key . '.']) ? $config[$key . '.'] : [];
-            $html = $manipulation->manipulate($html, $configuration);
-        }
-
-        if ($this->formatType > 0) {
-            $html = $this->formatHtml($html);
-        }
-
-        return $html;
-    }
-
-    /**
-     * Formats the (X)HTML code:
-     *  - taps according to the hirarchy of the tags
-     *  - removes empty spaces between tags
-     *  - removes linebreaks within tags (spares where necessary: pre, textarea, comments, ..)
-     *  choose from five options:
-     *    0 => off
-     *    1 => no line break at all  (code in one line)
-     *    2 => minimalistic line breaks (structure defining box-elements)
-     *    3 => aesthetic line breaks (important box-elements)
-     *    4 => logic line breaks (all box-elements)
-     *    5 => max line breaks (all elements)
-     *
-     * @param string $html
-     *
-     * @return string
-     */
-    protected function formatHtml($html)
-    {
-        // Save original formated comments, pre, textarea, styles and java-scripts & replace them with markers
-        preg_match_all(
-            '/(?s)((<!--.*?-->)|(<[ \n\r]*pre[^>]*>.*?<[ \n\r]*\/pre[^>]*>)|(<[ \n\r]*textarea[^>]*>.*?<[ \n\r]*\/textarea[^>]*>)|(<[ \n\r]*style[^>]*>.*?<[ \n\r]*\/style[^>]*>)|(<[ \n\r]*script[^>]*>.*?<[ \n\r]*\/script[^>]*>))/im',
-            $html,
-            $matches
-        );
-        $noFormat = $matches[0]; // do not format these block elements
-        for ($i = 0; $i < count($noFormat); $i++) {
-            $html = str_replace($noFormat[$i], "\n<!-- ELEMENT $i -->", $html);
-        }
-
-        // define box elements for formatting
-        $trueBoxElements = 'address|blockquote|center|dir|div|dl|fieldset|form|h1|h2|h3|h4|h5|h6|hr|isindex|menu|noframes|noscript|ol|p|pre|table|ul|article|aside|details|figcaption|figure|footer|header|hgroup|menu|nav|section';
-        $functionalBoxElements = 'dd|dt|frameset|li|tbody|td|tfoot|th|thead|tr|colgroup';
-        $usableBoxElements = 'applet|button|del|iframe|ins|map|object|script';
-        $imagineBoxElements = 'html|body|head|meta|title|link|script|base|!--';
-        $allBoxLikeElements = '(?>' . $trueBoxElements . '|' . $functionalBoxElements . '|' . $usableBoxElements . '|' . $imagineBoxElements . ')';
-        $esteticBoxLikeElements = '(?>html|head|body|meta name|title|div|table|h1|h2|h3|h4|h5|h6|p|form|pre|center|!--)';
-        $structureBoxLikeElements = '(?>html|head|body|div|!--)';
-
-        // split html into it's elements
-        $htmlArrayTemp = preg_split(
-            '/(<(?:[^<>]+(?:"[^"]*"|\'[^\']*\')?)+>)/',
-            $html,
-            -1,
-            PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY
-        );
-
-        if ($htmlArrayTemp === false) {
-            // Restore saved comments, styles and java-scripts
-            for ($i = 0; $i < count($noFormat); $i++) {
-                $noFormat[$i] = $this->rTrimLines($noFormat[$i]); // remove white space after line ending
-                $html = str_replace("<!-- ELEMENT $i -->", $noFormat[$i], $html);
-            }
-            return $html;
-        }
-        // remove empty lines
-        $htmlArray = [''];
-        $z = 1;
-        for ($x = 0; $x < count($htmlArrayTemp); $x++) {
-            $t = trim($htmlArrayTemp[$x]);
-            if ($t !== '') {
-                $htmlArray[$z] = $htmlArrayTemp[$x];
-                $z++;
-            } else {
-                $htmlArray[$z] = $this->emptySpaceChar;
-                $z++;
-            }
-        }
-
-        // rebuild html
-        $html = '';
-        $tabs = 0;
-        for ($x = 0; $x < count($htmlArray); $x++) {
-            // check if the element should stand in a new line
-            $newline = false;
-            if (substr($htmlArray[$x - 1], 0, 5) == '<?xml') {
-                $newline = true;
-            } elseif ($this->formatType == 2 && ( // minimalistic line break
-                    # this element has a line break before itself
-                    preg_match(
-                        '/<' . $structureBoxLikeElements . '(.*)>/Usi',
-                        $htmlArray[$x]
-                    ) || preg_match(
-                        '/<' . $structureBoxLikeElements . '(.*) \/>/Usi',
-                        $htmlArray[$x]
-                    ) || # one element before is a element that has a line break after
-                    preg_match(
-                        '/<\/' . $structureBoxLikeElements . '(.*)>/Usi',
-                        $htmlArray[$x - 1]
-                    ) || substr(
-                        $htmlArray[$x - 1],
-                        0,
-                        4
-                    ) == '<!--' || preg_match('/<' . $structureBoxLikeElements . '(.*) \/>/Usi', $htmlArray[$x - 1]))
-            ) {
-                $newline = true;
-            } elseif ($this->formatType == 3 && ( // aestetic line break
-                    # this element has a line break before itself
-                    preg_match(
-                        '/<' . $esteticBoxLikeElements . '(.*)>/Usi',
-                        $htmlArray[$x]
-                    ) || preg_match(
-                        '/<' . $esteticBoxLikeElements . '(.*) \/>/Usi',
-                        $htmlArray[$x]
-                    ) || # one element before is a element that has a line break after
-                    preg_match('/<\/' . $esteticBoxLikeElements . '(.*)>/Usi', $htmlArray[$x - 1]) || substr(
-                        $htmlArray[$x - 1],
-                        0,
-                        4
-                    ) == '<!--' || preg_match('/<' . $esteticBoxLikeElements . '(.*) \/>/Usi', $htmlArray[$x - 1]))
-            ) {
-                $newline = true;
-            } elseif ($this->formatType >= 4 && ( // logical line break
-                    # this element has a line break before itself
-                    preg_match(
-                        '/<' . $allBoxLikeElements . '(.*)>/Usi',
-                        $htmlArray[$x]
-                    ) || preg_match(
-                        '/<' . $allBoxLikeElements . '(.*) \/>/Usi',
-                        $htmlArray[$x]
-                    ) || # one element before is a element that has a line break after
-                    preg_match('/<\/' . $allBoxLikeElements . '(.*)>/Usi', $htmlArray[$x - 1]) || substr(
-                        $htmlArray[$x - 1],
-                        0,
-                        4
-                    ) == '<!--' || preg_match('/<' . $allBoxLikeElements . '(.*) \/>/Usi', $htmlArray[$x - 1]))
-            ) {
-                $newline = true;
-            }
-
-            // count down a tab
-            if (substr($htmlArray[$x], 0, 2) == '</') {
-                $tabs--;
-            }
-
-            // add tabs and line breaks in front of the current tag
-            if ($newline) {
-                $html .= $this->newline;
-                for ($y = 0; $y < $tabs; $y++) {
-                    $html .= $this->tab;
-                }
-            }
-
-            // remove white spaces and line breaks and add current tag to the html-string
-            if (substr($htmlArray[$x - 1], 0, 4) == '<pre' // remove white space after line ending in PRE / TEXTAREA / comment
-                || substr($htmlArray[$x - 1], 0, 9) == '<textarea' || substr($htmlArray[$x - 1], 0, 4) == '<!--'
-            ) {
-                $html .= $this->rTrimLines($htmlArray[$x]);
-            } elseif (substr($htmlArray[$x], 0, 9) == '<![CDATA[' // remove multiple white space in CDATA / XML
-                || substr($htmlArray[$x], 0, 5) == '<?xml'
-            ) {
-                $html .= $this->killWhiteSpace($htmlArray[$x]);
-            } else { // remove all line breaks
-                $html .= $this->killLineBreaks($htmlArray[$x]);
-            }
-
-            // count up a tab
-            if (substr($htmlArray[$x], 0, 1) == '<' && substr($htmlArray[$x], 1, 1) != '/') {
-                if (
-                    substr($htmlArray[$x], 1, 1) !== ' '
-                    && substr($htmlArray[$x], 1, 3) !== 'img'
-                    && substr($htmlArray[$x], 1, 6) !== 'source'
-                    && substr($htmlArray[$x], 1, 2) !== 'br'
-                    && substr($htmlArray[$x], 1, 2) !== 'hr'
-                    && substr($htmlArray[$x], 1, 5) !== 'input'
-                    && substr($htmlArray[$x], 1, 4) !== 'link'
-                    && substr($htmlArray[$x], 1, 4) !== 'meta'
-                    && substr($htmlArray[$x], 1, 4) !== 'col '
-                    && substr($htmlArray[$x], 1, 5) !== 'frame'
-                    && substr($htmlArray[$x], 1, 7) !== 'isindex'
-                    && substr($htmlArray[$x], 1, 5) !== 'param'
-                    && substr($htmlArray[$x], 1, 4) !== 'area'
-                    && substr($htmlArray[$x], 1, 4) !== 'base'
-                    && substr($htmlArray[$x], 0, 2) !== '<!'
-                    && substr($htmlArray[$x], 0, 5) !== '<?xml'
-                ) {
-                    $tabs++;
-                }
-            }
-        }
-
-        // Remove empty lines
-        if ($this->formatType > 1) {
-            $this->removeEmptyLines($html);
-        }
-
-        // Restore saved comments, styles and java-scripts
-        for ($i = 0; $i < count($noFormat); $i++) {
-            $noFormat[$i] = $this->rTrimLines($noFormat[$i]); // remove white space after line ending
-            $html = str_replace("<!-- ELEMENT $i -->", $noFormat[$i], $html);
-        }
-
-        // include debug comment at the end
-        if ($tabs != 0 && $this->debugComment === true) {
-            $html .= '<!--' . $tabs . " open elements found-->\r\n";
-        }
-
-        return $html;
-    }
-
-    /**
-     * Remove ALL line breaks and multiple white space
-     *
-     * @param string $html
-     *
-     * @return string
-     */
-    protected function killLineBreaks($html)
-    {
-        $html = $this->convNlOs($html);
-        $html = str_replace($this->newline, "", $html);
-        $html = preg_replace('/\s\s+/u', ' ', $html);
-        return $html;
-    }
-
-    /**
-     * Remove multiple white space, keeps line breaks
-     *
-     * @param string $html
-     *
-     * @return string
-     */
-    protected function killWhiteSpace($html)
-    {
-        $html = $this->convNlOs($html);
-        $temp = explode($this->newline, $html);
-        for ($i = 0; $i < count($temp); $i++) {
-            if (!trim($temp[$i])) {
-                unset($temp[$i]);
-            } else {
-                $temp[$i] = trim($temp[$i]);
-                $temp[$i] = preg_replace('/\s\s+/', ' ', $temp[$i]);
-            }
-        }
-        $html = implode($this->newline, $temp);
-        return $html;
-    }
-
-    /**
-     * Remove white space at the end of lines, keeps other white space and line breaks
-     *
-     * @param string $html
-     *
-     * @return string
-     */
-    protected function rTrimLines($html)
-    {
-        $html = $this->convNlOs($html);
-        $temp = explode($this->newline, $html);
-        for ($i = 0; $i < count($temp); $i++) {
-            $temp[$i] = rtrim($temp[$i]);
-        }
-        $html = implode($this->newline, $temp);
-        return $html;
-    }
-
-    /**
-     * Convert newlines according to the current OS
-     *
-     * @param string $html
-     *
-     * @return string
-     */
-    protected function convNlOs($html)
-    {
-        $html = preg_replace("(\r\n|\n|\r)", $this->newline, $html);
-        return $html;
-    }
-
-    /**
-     * Remove tabs and empty spaces before and after lines, transforms linebreaks system conform
-     *
-     * @param string $html Html-Code
-     *
-     * @return void
-     */
-    protected function trimLines(&$html)
-    {
-        $html = str_replace("\t", "", $html);
-        // convert newlines according to the current OS
-        if (Environment::isWindows()) {
-            $html = str_replace("\n", "\r\n", $html);
-        } else {
-            $html = str_replace("\r\n", "\n", $html);
-        }
-        $temp = explode($this->newline, $html);
-        $temp = array_map('trim', $temp);
-        $html = implode($this->newline, $temp);
-        unset($temp);
-    }
-
-    /**
-     * Remove empty lines
-     *
-     * @param string $html
-     *
-     * @return void
-     */
-    protected function removeEmptyLines(&$html)
-    {
-        $temp = explode($this->newline, $html);
-        $result = [];
-        for ($i = 0; $i < count($temp); ++$i) {
-            if ("" == trim($temp[$i])) {
-                continue;
-            }
-            $result[] = $temp[$i];
-        }
-        $html = implode($this->newline, $result);
-    }
-
-    /**
-     * Remove new lines where unnecessary
-     * spares line breaks within: pre, textarea, ...
-     *
-     * @param string $html
-     *
-     * @return void
-     */
-    protected function removeNewLines(&$html)
-    {
-        $splitArray = [
-            'textarea',
-            'pre'
-        ]; // eventuell auch: span, script, style
-        $peaces = preg_split('#(<(' . implode('|', $splitArray) . ').*>.*</\2>)#Uis', $html, -1, PREG_SPLIT_DELIM_CAPTURE);
-        $html = "";
-        for ($i = 0; $i < count($peaces); $i++) {
-            if (($i + 1) % 3 == 0) {
-                continue;
-            }
-            $html .= (($i - 1) % 3 != 0) ? $this->killLineBreaks($peaces[$i]) : $peaces[$i];
-        }
-    }
-
-    /**
-     * Remove obsolete link schema
-     *
-     * @param string $html
-     *
-     * @return void
-     */
-    protected function removeLinkSchema(&$html)
-    {
-        $html = preg_replace("/<link rel=\"?schema.dc\"?.+?>/is", "", $html);
-    }
-
-    /**
-     * Remove empty alt tags
-     *
-     * @param string $html
-     *
-     * @return void
-     */
-    protected function removeEmptyAltAtr(&$html)
-    {
-        $html = str_replace("alt=\"\"", "", $html);
-    }
-
-    /**
-     * Remove broken links in <a> tags
-     *
-     * @param string $html
-     *
-     * @return void
-     */
-    protected function removeRealUrlBrokenRootLink(&$html)
-    {
-        $html = str_replace('href=".html"', 'href=""', $html);
-    }
-
-    /**
-     * Include configured header comment in HTML content block
-     *
-     * @param $html
-     */
-    public function includeHeaderComment(&$html)
-    {
-        if (!empty($this->headerComment)) {
-            $html = preg_replace_callback('/<meta http-equiv(.*)>/Usi', function ($matches) {
-                return trim($matches[0] . $this->newline . $this->tab . $this->tab . '<!-- ' . $this->headerComment . '-->');
-            }, $html, 1);
-        }
-    }
+	/**
+	 * Enable Debug comment in footer
+	 *
+	 * @var boolean
+	 */
+	protected $debugComment = false;
+
+	/**
+	 * Format Type
+	 *
+	 * @var integer
+	 */
+	protected $formatType = 0;
+
+	/**
+	 * Tab character
+	 *
+	 * @var string
+	 */
+	protected $tab = "\t";
+
+	/**
+	 * Newline character
+	 *
+	 * @var string
+	 */
+	protected $newline = "\n";
+
+	/**
+	 * Configured extra header comment
+	 *
+	 * @var string
+	 */
+	protected $headerComment = '';
+
+	/**
+	 * Empty space char
+	 * @var string
+	 */
+	protected $emptySpaceChar = ' ';
+
+	/**
+	 * Set variables based on given config
+	 *
+	 * @param array $config
+	 *
+	 * @return void
+	 */
+	public function setVariables(array $config)
+	{
+		// Set newline based on OS
+		if (Environment::isWindows()) {
+			$this->newline = "\r\n";
+		} else {
+			$this->newline = "\n";
+		}
+
+		if (!empty($config)) {
+			if ($config['formatHtml'] && is_numeric($config['formatHtml'])) {
+				$this->formatType = (int)$config['formatHtml'];
+			}
+
+			if ($config['formatHtml.']['tabSize'] && is_numeric($config['formatHtml.']['tabSize'])) {
+				$this->tab = str_pad('', $config['formatHtml.']['tabSize'], ' ');
+			}
+
+			if (isset($config['formatHtml.']['debugComment'])) {
+				$this->debugComment = (bool)$config['formatHtml.']['debugComment'];
+			}
+
+			if (isset($config['headerComment'])) {
+				$this->headerComment = $config['headerComment'];
+			}
+
+			if (isset($config['dropEmptySpaceChar']) && (bool)$config['dropEmptySpaceChar']) {
+				$this->emptySpaceChar = '';
+			}
+		}
+	}
+
+	/**
+	 * Clean given HTML with formatter
+	 *
+	 * @param string $html
+	 * @param array $config
+	 *
+	 * @return string
+	 */
+	public function clean($html, $config = [])
+	{
+		if (!empty($config)) {
+			if ((bool)$config['enabled'] === false) {
+				return $html;
+			}
+
+			$this->setVariables($config);
+		}
+
+		$manipulations = [];
+
+		if (isset($config['removeGenerator']) && (bool)$config['removeGenerator']) {
+			$manipulations['removeGenerator'] = GeneralUtility::makeInstance(RemoveGenerator::class);
+		}
+
+		if (isset($config['removeComments']) && (bool)$config['removeComments']) {
+			$manipulations['removeComments'] = GeneralUtility::makeInstance(RemoveComments::class);
+		}
+
+		if (isset($config['removeBlurScript']) && (bool)$config['removeBlurScript']) {
+			$manipulations['removeBlurScript'] = GeneralUtility::makeInstance(RemoveBlurScript::class);
+		}
+
+		if (!empty($this->headerComment)) {
+			$this->includeHeaderComment($html);
+		}
+
+		foreach ($manipulations as $key => $manipulation) {
+			/** @var ManipulationInterface $manipulation */
+			$configuration = isset($config[$key . '.']) && is_array($config[$key . '.']) ? $config[$key . '.'] : [];
+			$html = $manipulation->manipulate($html, $configuration);
+		}
+
+		if ($this->formatType > 0) {
+			$html = $this->formatHtml($html);
+		}
+
+		return $html;
+	}
+
+	/**
+	 * Formats the (X)HTML code:
+	 *  - taps according to the hirarchy of the tags
+	 *  - removes empty spaces between tags
+	 *  - removes linebreaks within tags (spares where necessary: pre, textarea, comments, ..)
+	 *  choose from five options:
+	 *    0 => off
+	 *    1 => no line break at all  (code in one line)
+	 *    2 => minimalistic line breaks (structure defining box-elements)
+	 *    3 => aesthetic line breaks (important box-elements)
+	 *    4 => logic line breaks (all box-elements)
+	 *    5 => max line breaks (all elements)
+	 *
+	 * @param string $html
+	 *
+	 * @return string
+	 */
+	protected function formatHtml($html)
+	{
+		// Save original formated comments, pre, textarea, styles and java-scripts & replace them with markers
+		preg_match_all(
+			'/(?s)((<!--.*?-->)|(<[ \n\r]*pre[^>]*>.*?<[ \n\r]*\/pre[^>]*>)|(<[ \n\r]*textarea[^>]*>.*?<[ \n\r]*\/textarea[^>]*>)|(<[ \n\r]*style[^>]*>.*?<[ \n\r]*\/style[^>]*>)|(<[ \n\r]*script[^>]*>.*?<[ \n\r]*\/script[^>]*>))/im',
+			$html,
+			$matches
+		);
+		$noFormat = $matches[0]; // do not format these block elements
+		for ($i = 0; $i < count($noFormat); $i++) {
+			$html = str_replace($noFormat[$i], "\n<!-- ELEMENT $i -->", $html);
+		}
+
+		// define box elements for formatting
+		$trueBoxElements = 'address|blockquote|center|dir|div|dl|fieldset|form|h1|h2|h3|h4|h5|h6|hr|isindex|menu|noframes|noscript|ol|p|pre|table|ul|article|aside|details|figcaption|figure|footer|header|hgroup|menu|nav|section';
+		$functionalBoxElements = 'dd|dt|frameset|li|tbody|td|tfoot|th|thead|tr|colgroup';
+		$usableBoxElements = 'applet|button|del|iframe|ins|map|object|script';
+		$imagineBoxElements = 'html|body|head|meta|title|link|script|base|!--';
+		$allBoxLikeElements = '(?>' . $trueBoxElements . '|' . $functionalBoxElements . '|' . $usableBoxElements . '|' . $imagineBoxElements . ')';
+		$esteticBoxLikeElements = '(?>html|head|body|meta name|title|div|table|h1|h2|h3|h4|h5|h6|p|form|pre|center|!--)';
+		$structureBoxLikeElements = '(?>html|head|body|div|!--)';
+
+		// split html into it's elements
+		$htmlArrayTemp = preg_split(
+			'/(<(?:[^<>]+(?:"[^"]*"|\'[^\']*\')?)+>)/',
+			$html,
+			-1,
+			PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY
+		);
+
+		if ($htmlArrayTemp === false) {
+			// Restore saved comments, styles and java-scripts
+			for ($i = 0; $i < count($noFormat); $i++) {
+				$noFormat[$i] = $this->rTrimLines($noFormat[$i]); // remove white space after line ending
+				$html = str_replace("<!-- ELEMENT $i -->", $noFormat[$i], $html);
+			}
+			return $html;
+		}
+		// remove empty lines
+		$htmlArray = [''];
+		$z = 1;
+		for ($x = 0; $x < count($htmlArrayTemp); $x++) {
+			$t = trim($htmlArrayTemp[$x]);
+			if ($t !== '') {
+				$htmlArray[$z] = $htmlArrayTemp[$x];
+				$z++;
+			} else {
+				$htmlArray[$z] = $this->emptySpaceChar;
+				$z++;
+			}
+		}
+
+		// rebuild html
+		$html = '';
+		$tabs = 0;
+		for ($x = 0; $x < count($htmlArray); $x++) {
+			// check if the element should stand in a new line
+			$newline = false;
+			if (substr($htmlArray[$x - 1], 0, 5) == '<?xml') {
+				$newline = true;
+			} elseif ($this->formatType == 2 && ( // minimalistic line break
+					# this element has a line break before itself
+					preg_match(
+						'/<' . $structureBoxLikeElements . '(.*)>/Usi',
+						$htmlArray[$x]
+					) || preg_match(
+						'/<' . $structureBoxLikeElements . '(.*) \/>/Usi',
+						$htmlArray[$x]
+					) || # one element before is a element that has a line break after
+					preg_match(
+						'/<\/' . $structureBoxLikeElements . '(.*)>/Usi',
+						$htmlArray[$x - 1]
+					) || substr(
+						$htmlArray[$x - 1],
+						0,
+						4
+					) == '<!--' || preg_match('/<' . $structureBoxLikeElements . '(.*) \/>/Usi', $htmlArray[$x - 1]))
+			) {
+				$newline = true;
+			} elseif ($this->formatType == 3 && ( // aestetic line break
+					# this element has a line break before itself
+					preg_match(
+						'/<' . $esteticBoxLikeElements . '(.*)>/Usi',
+						$htmlArray[$x]
+					) || preg_match(
+						'/<' . $esteticBoxLikeElements . '(.*) \/>/Usi',
+						$htmlArray[$x]
+					) || # one element before is a element that has a line break after
+					preg_match('/<\/' . $esteticBoxLikeElements . '(.*)>/Usi', $htmlArray[$x - 1]) || substr(
+						$htmlArray[$x - 1],
+						0,
+						4
+					) == '<!--' || preg_match('/<' . $esteticBoxLikeElements . '(.*) \/>/Usi', $htmlArray[$x - 1]))
+			) {
+				$newline = true;
+			} elseif ($this->formatType >= 4 && ( // logical line break
+					# this element has a line break before itself
+					preg_match(
+						'/<' . $allBoxLikeElements . '(.*)>/Usi',
+						$htmlArray[$x]
+					) || preg_match(
+						'/<' . $allBoxLikeElements . '(.*) \/>/Usi',
+						$htmlArray[$x]
+					) || # one element before is a element that has a line break after
+					preg_match('/<\/' . $allBoxLikeElements . '(.*)>/Usi', $htmlArray[$x - 1]) || substr(
+						$htmlArray[$x - 1],
+						0,
+						4
+					) == '<!--' || preg_match('/<' . $allBoxLikeElements . '(.*) \/>/Usi', $htmlArray[$x - 1]))
+			) {
+				$newline = true;
+			}
+
+			// count down a tab
+			if (substr($htmlArray[$x], 0, 2) == '</') {
+				$tabs--;
+			}
+
+			// add tabs and line breaks in front of the current tag
+			if ($newline) {
+				$html .= $this->newline;
+				for ($y = 0; $y < $tabs; $y++) {
+					$html .= $this->tab;
+				}
+			}
+
+			// remove white spaces and line breaks and add current tag to the html-string
+			if (substr($htmlArray[$x - 1], 0, 4) == '<pre' // remove white space after line ending in PRE / TEXTAREA / comment
+				|| substr($htmlArray[$x - 1], 0, 9) == '<textarea' || substr($htmlArray[$x - 1], 0, 4) == '<!--'
+			) {
+				$html .= $this->rTrimLines($htmlArray[$x]);
+			} elseif (substr($htmlArray[$x], 0, 9) == '<![CDATA[' // remove multiple white space in CDATA / XML
+				|| substr($htmlArray[$x], 0, 5) == '<?xml'
+			) {
+				$html .= $this->killWhiteSpace($htmlArray[$x]);
+			} else { // remove all line breaks
+				$html .= $this->killLineBreaks($htmlArray[$x]);
+			}
+
+			// count up a tab
+			if (substr($htmlArray[$x], 0, 1) == '<' && substr($htmlArray[$x], 1, 1) != '/') {
+				if (
+					substr($htmlArray[$x], 1, 1) !== ' '
+					&& substr($htmlArray[$x], 1, 3) !== 'img'
+					&& substr($htmlArray[$x], 1, 6) !== 'source'
+					&& substr($htmlArray[$x], 1, 2) !== 'br'
+					&& substr($htmlArray[$x], 1, 2) !== 'hr'
+					&& substr($htmlArray[$x], 1, 5) !== 'input'
+					&& substr($htmlArray[$x], 1, 4) !== 'link'
+					&& substr($htmlArray[$x], 1, 4) !== 'meta'
+					&& substr($htmlArray[$x], 1, 4) !== 'col '
+					&& substr($htmlArray[$x], 1, 5) !== 'frame'
+					&& substr($htmlArray[$x], 1, 7) !== 'isindex'
+					&& substr($htmlArray[$x], 1, 5) !== 'param'
+					&& substr($htmlArray[$x], 1, 4) !== 'area'
+					&& substr($htmlArray[$x], 1, 4) !== 'base'
+					&& substr($htmlArray[$x], 0, 2) !== '<!'
+					&& substr($htmlArray[$x], 0, 5) !== '<?xml'
+				) {
+					$tabs++;
+				}
+			}
+		}
+
+		// Remove empty lines
+		if ($this->formatType > 1) {
+			$this->removeEmptyLines($html);
+		}
+
+		// Restore saved comments, styles and java-scripts
+		for ($i = 0; $i < count($noFormat); $i++) {
+			$noFormat[$i] = $this->rTrimLines($noFormat[$i]); // remove white space after line ending
+			$html = str_replace("<!-- ELEMENT $i -->", $noFormat[$i], $html);
+		}
+
+		// include debug comment at the end
+		if ($tabs != 0 && $this->debugComment === true) {
+			$html .= '<!--' . $tabs . " open elements found-->\r\n";
+		}
+
+		return $html;
+	}
+
+	/**
+	 * Remove ALL line breaks and multiple white space
+	 *
+	 * @param string $html
+	 *
+	 * @return string
+	 */
+	protected function killLineBreaks($html)
+	{
+		$html = $this->convNlOs($html);
+		$html = str_replace($this->newline, "", $html);
+		$html = preg_replace('/\s\s+/u', ' ', $html);
+		return $html;
+	}
+
+	/**
+	 * Remove multiple white space, keeps line breaks
+	 *
+	 * @param string $html
+	 *
+	 * @return string
+	 */
+	protected function killWhiteSpace($html)
+	{
+		$html = $this->convNlOs($html);
+		$temp = explode($this->newline, $html);
+		for ($i = 0; $i < count($temp); $i++) {
+			if (!trim($temp[$i])) {
+				unset($temp[$i]);
+			} else {
+				$temp[$i] = trim($temp[$i]);
+				$temp[$i] = preg_replace('/\s\s+/', ' ', $temp[$i]);
+			}
+		}
+		$html = implode($this->newline, $temp);
+		return $html;
+	}
+
+	/**
+	 * Remove white space at the end of lines, keeps other white space and line breaks
+	 *
+	 * @param string $html
+	 *
+	 * @return string
+	 */
+	protected function rTrimLines($html)
+	{
+		$html = $this->convNlOs($html);
+		$temp = explode($this->newline, $html);
+		for ($i = 0; $i < count($temp); $i++) {
+			$temp[$i] = rtrim($temp[$i]);
+		}
+		$html = implode($this->newline, $temp);
+		return $html;
+	}
+
+	/**
+	 * Convert newlines according to the current OS
+	 *
+	 * @param string $html
+	 *
+	 * @return string
+	 */
+	protected function convNlOs($html)
+	{
+		$html = preg_replace("(\r\n|\n|\r)", $this->newline, $html);
+		return $html;
+	}
+
+	/**
+	 * Remove tabs and empty spaces before and after lines, transforms linebreaks system conform
+	 *
+	 * @param string $html Html-Code
+	 *
+	 * @return void
+	 */
+	protected function trimLines(&$html)
+	{
+		$html = str_replace("\t", "", $html);
+		// convert newlines according to the current OS
+		if (Environment::isWindows()) {
+			$html = str_replace("\n", "\r\n", $html);
+		} else {
+			$html = str_replace("\r\n", "\n", $html);
+		}
+		$temp = explode($this->newline, $html);
+		$temp = array_map('trim', $temp);
+		$html = implode($this->newline, $temp);
+		unset($temp);
+	}
+
+	/**
+	 * Remove empty lines
+	 *
+	 * @param string $html
+	 *
+	 * @return void
+	 */
+	protected function removeEmptyLines(&$html)
+	{
+		$temp = explode($this->newline, $html);
+		$result = [];
+		for ($i = 0; $i < count($temp); ++$i) {
+			if ("" == trim($temp[$i])) {
+				continue;
+			}
+			$result[] = $temp[$i];
+		}
+		$html = implode($this->newline, $result);
+	}
+
+	/**
+	 * Remove new lines where unnecessary
+	 * spares line breaks within: pre, textarea, ...
+	 *
+	 * @param string $html
+	 *
+	 * @return void
+	 */
+	protected function removeNewLines(&$html)
+	{
+		$splitArray = [
+			'textarea',
+			'pre'
+		]; // eventuell auch: span, script, style
+		$peaces = preg_split('#(<(' . implode('|', $splitArray) . ').*>.*</\2>)#Uis', $html, -1, PREG_SPLIT_DELIM_CAPTURE);
+		$html = "";
+		for ($i = 0; $i < count($peaces); $i++) {
+			if (($i + 1) % 3 == 0) {
+				continue;
+			}
+			$html .= (($i - 1) % 3 != 0) ? $this->killLineBreaks($peaces[$i]) : $peaces[$i];
+		}
+	}
+
+	/**
+	 * Remove obsolete link schema
+	 *
+	 * @param string $html
+	 *
+	 * @return void
+	 */
+	protected function removeLinkSchema(&$html)
+	{
+		$html = preg_replace("/<link rel=\"?schema.dc\"?.+?>/is", "", $html);
+	}
+
+	/**
+	 * Remove empty alt tags
+	 *
+	 * @param string $html
+	 *
+	 * @return void
+	 */
+	protected function removeEmptyAltAtr(&$html)
+	{
+		$html = str_replace("alt=\"\"", "", $html);
+	}
+
+	/**
+	 * Remove broken links in <a> tags
+	 *
+	 * @param string $html
+	 *
+	 * @return void
+	 */
+	protected function removeRealUrlBrokenRootLink(&$html)
+	{
+		$html = str_replace('href=".html"', 'href=""', $html);
+	}
+
+	/**
+	 * Include configured header comment in HTML content block
+	 *
+	 * @param $html
+	 */
+	public function includeHeaderComment(&$html)
+	{
+		if (!empty($this->headerComment)) {
+			$html = preg_replace_callback('/<meta http-equiv(.*)>/Usi', function ($matches) {
+				return trim($matches[0] . $this->newline . $this->tab . $this->tab . '<!-- ' . $this->headerComment . '-->');
+			}, $html, 1);
+		}
+	}
 }