mirror of
https://github.com/silverstripe/silverstripe-docsviewer
synced 2024-10-22 11:05:56 +02:00
482 lines
17 KiB
PHP
Executable File
482 lines
17 KiB
PHP
Executable File
<?php
|
|
/**
|
|
* Zend Framework
|
|
*
|
|
* LICENSE
|
|
*
|
|
* This source file is subject to the new BSD license that is bundled
|
|
* with this package in the file LICENSE.txt.
|
|
* It is also available through the world-wide-web at this URL:
|
|
* http://framework.zend.com/license/new-bsd
|
|
* If you did not receive a copy of the license and are unable to
|
|
* obtain it through the world-wide-web, please send an email
|
|
* to license@zend.com so we can send you a copy immediately.
|
|
*
|
|
* @category Zend
|
|
* @package Zend_Search_Lucene
|
|
* @subpackage Document
|
|
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
|
* @license http://framework.zend.com/license/new-bsd New BSD License
|
|
* @version $Id: Html.php 21946 2010-04-19 08:21:02Z alexander $
|
|
*/
|
|
|
|
|
|
/** Zend_Search_Lucene_Document */
|
|
require_once 'Zend/Search/Lucene/Document.php';
|
|
|
|
|
|
/**
|
|
* HTML document.
|
|
*
|
|
* @category Zend
|
|
* @package Zend_Search_Lucene
|
|
* @subpackage Document
|
|
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
|
* @license http://framework.zend.com/license/new-bsd New BSD License
|
|
*/
|
|
class Zend_Search_Lucene_Document_Html extends Zend_Search_Lucene_Document
|
|
{
|
|
/**
|
|
* List of document links
|
|
*
|
|
* @var array
|
|
*/
|
|
private $_links = array();
|
|
|
|
/**
|
|
* List of document header links
|
|
*
|
|
* @var array
|
|
*/
|
|
private $_headerLinks = array();
|
|
|
|
/**
|
|
* Stored DOM representation
|
|
*
|
|
* @var DOMDocument
|
|
*/
|
|
private $_doc;
|
|
|
|
/**
|
|
* Exclud nofollow links flag
|
|
*
|
|
* If true then links with rel='nofollow' attribute are not included into
|
|
* document links.
|
|
*
|
|
* @var boolean
|
|
*/
|
|
private static $_excludeNoFollowLinks = false;
|
|
|
|
/**
|
|
*
|
|
* List of inline tags
|
|
*
|
|
* @var array
|
|
*/
|
|
private $_inlineTags = array('a', 'abbr', 'acronym', 'dfn', 'em', 'strong', 'code',
|
|
'samp', 'kbd', 'var', 'b', 'i', 'big', 'small', 'strike',
|
|
'tt', 'u', 'font', 'span', 'bdo', 'cite', 'del', 'ins',
|
|
'q', 'sub', 'sup');
|
|
|
|
/**
|
|
* Object constructor
|
|
*
|
|
* @param string $data HTML string (may be HTML fragment, )
|
|
* @param boolean $isFile
|
|
* @param boolean $storeContent
|
|
* @param string $defaultEncoding HTML encoding, is used if it's not specified using Content-type HTTP-EQUIV meta tag.
|
|
*/
|
|
private function __construct($data, $isFile, $storeContent, $defaultEncoding = '')
|
|
{
|
|
$this->_doc = new DOMDocument();
|
|
$this->_doc->substituteEntities = true;
|
|
|
|
if ($isFile) {
|
|
$htmlData = file_get_contents($data);
|
|
} else {
|
|
$htmlData = $data;
|
|
}
|
|
@$this->_doc->loadHTML($htmlData);
|
|
|
|
if ($this->_doc->encoding === null) {
|
|
// Document encoding is not recognized
|
|
|
|
/** @todo improve HTML vs HTML fragment recognition */
|
|
if (preg_match('/<html>/i', $htmlData, $matches, PREG_OFFSET_CAPTURE)) {
|
|
// It's an HTML document
|
|
// Add additional HEAD section and recognize document
|
|
$htmlTagOffset = $matches[0][1] + strlen($matches[0][0]);
|
|
|
|
@$this->_doc->loadHTML(iconv($defaultEncoding, 'UTF-8//IGNORE', substr($htmlData, 0, $htmlTagOffset))
|
|
. '<head><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"/></head>'
|
|
. iconv($defaultEncoding, 'UTF-8//IGNORE', substr($htmlData, $htmlTagOffset)));
|
|
|
|
// Remove additional HEAD section
|
|
$xpath = new DOMXPath($this->_doc);
|
|
$head = $xpath->query('/html/head')->item(0);
|
|
$head->parentNode->removeChild($head);
|
|
} else {
|
|
// It's an HTML fragment
|
|
@$this->_doc->loadHTML('<html><head><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"/></head><body>'
|
|
. iconv($defaultEncoding, 'UTF-8//IGNORE', $htmlData)
|
|
. '</body></html>');
|
|
}
|
|
|
|
}
|
|
/** @todo Add correction of wrong HTML encoding recognition processing
|
|
* The case is:
|
|
* Content-type HTTP-EQUIV meta tag is presented, but ISO-8859-5 encoding is actually used,
|
|
* even $this->_doc->encoding demonstrates another recognized encoding
|
|
*/
|
|
|
|
$xpath = new DOMXPath($this->_doc);
|
|
|
|
$docTitle = '';
|
|
$titleNodes = $xpath->query('/html/head/title');
|
|
foreach ($titleNodes as $titleNode) {
|
|
// title should always have only one entry, but we process all nodeset entries
|
|
$docTitle .= $titleNode->nodeValue . ' ';
|
|
}
|
|
$this->addField(Zend_Search_Lucene_Field::Text('title', $docTitle, 'UTF-8'));
|
|
|
|
$metaNodes = $xpath->query('/html/head/meta[@name]');
|
|
foreach ($metaNodes as $metaNode) {
|
|
$this->addField(Zend_Search_Lucene_Field::Text($metaNode->getAttribute('name'),
|
|
$metaNode->getAttribute('content'),
|
|
'UTF-8'));
|
|
}
|
|
|
|
$docBody = '';
|
|
$bodyNodes = $xpath->query('/html/body');
|
|
foreach ($bodyNodes as $bodyNode) {
|
|
// body should always have only one entry, but we process all nodeset entries
|
|
$this->_retrieveNodeText($bodyNode, $docBody);
|
|
}
|
|
if ($storeContent) {
|
|
$this->addField(Zend_Search_Lucene_Field::Text('body', $docBody, 'UTF-8'));
|
|
} else {
|
|
$this->addField(Zend_Search_Lucene_Field::UnStored('body', $docBody, 'UTF-8'));
|
|
}
|
|
|
|
$linkNodes = $this->_doc->getElementsByTagName('a');
|
|
foreach ($linkNodes as $linkNode) {
|
|
if (($href = $linkNode->getAttribute('href')) != '' &&
|
|
(!self::$_excludeNoFollowLinks || strtolower($linkNode->getAttribute('rel')) != 'nofollow' )
|
|
) {
|
|
$this->_links[] = $href;
|
|
}
|
|
}
|
|
$linkNodes = $this->_doc->getElementsByTagName('area');
|
|
foreach ($linkNodes as $linkNode) {
|
|
if (($href = $linkNode->getAttribute('href')) != '' &&
|
|
(!self::$_excludeNoFollowLinks || strtolower($linkNode->getAttribute('rel')) != 'nofollow' )
|
|
) {
|
|
$this->_links[] = $href;
|
|
}
|
|
}
|
|
$this->_links = array_unique($this->_links);
|
|
|
|
$linkNodes = $xpath->query('/html/head/link');
|
|
foreach ($linkNodes as $linkNode) {
|
|
if (($href = $linkNode->getAttribute('href')) != '') {
|
|
$this->_headerLinks[] = $href;
|
|
}
|
|
}
|
|
$this->_headerLinks = array_unique($this->_headerLinks);
|
|
}
|
|
|
|
/**
|
|
* Set exclude nofollow links flag
|
|
*
|
|
* @param boolean $newValue
|
|
*/
|
|
public static function setExcludeNoFollowLinks($newValue)
|
|
{
|
|
self::$_excludeNoFollowLinks = $newValue;
|
|
}
|
|
|
|
/**
|
|
* Get exclude nofollow links flag
|
|
*
|
|
* @return boolean
|
|
*/
|
|
public static function getExcludeNoFollowLinks()
|
|
{
|
|
return self::$_excludeNoFollowLinks;
|
|
}
|
|
|
|
/**
|
|
* Get node text
|
|
*
|
|
* We should exclude scripts, which may be not included into comment tags, CDATA sections,
|
|
*
|
|
* @param DOMNode $node
|
|
* @param string &$text
|
|
*/
|
|
private function _retrieveNodeText(DOMNode $node, &$text)
|
|
{
|
|
if ($node->nodeType == XML_TEXT_NODE) {
|
|
$text .= $node->nodeValue;
|
|
if(!in_array($node->parentNode->tagName, $this->_inlineTags)) {
|
|
$text .= ' ';
|
|
}
|
|
} else if ($node->nodeType == XML_ELEMENT_NODE && $node->nodeName != 'script') {
|
|
foreach ($node->childNodes as $childNode) {
|
|
$this->_retrieveNodeText($childNode, $text);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get document HREF links
|
|
*
|
|
* @return array
|
|
*/
|
|
public function getLinks()
|
|
{
|
|
return $this->_links;
|
|
}
|
|
|
|
/**
|
|
* Get document header links
|
|
*
|
|
* @return array
|
|
*/
|
|
public function getHeaderLinks()
|
|
{
|
|
return $this->_headerLinks;
|
|
}
|
|
|
|
/**
|
|
* Load HTML document from a string
|
|
*
|
|
* @param string $data
|
|
* @param boolean $storeContent
|
|
* @param string $defaultEncoding HTML encoding, is used if it's not specified using Content-type HTTP-EQUIV meta tag.
|
|
* @return Zend_Search_Lucene_Document_Html
|
|
*/
|
|
public static function loadHTML($data, $storeContent = false, $defaultEncoding = '')
|
|
{
|
|
return new Zend_Search_Lucene_Document_Html($data, false, $storeContent, $defaultEncoding);
|
|
}
|
|
|
|
/**
|
|
* Load HTML document from a file
|
|
*
|
|
* @param string $file
|
|
* @param boolean $storeContent
|
|
* @param string $defaultEncoding HTML encoding, is used if it's not specified using Content-type HTTP-EQUIV meta tag.
|
|
* @return Zend_Search_Lucene_Document_Html
|
|
*/
|
|
public static function loadHTMLFile($file, $storeContent = false, $defaultEncoding = '')
|
|
{
|
|
return new Zend_Search_Lucene_Document_Html($file, true, $storeContent, $defaultEncoding);
|
|
}
|
|
|
|
|
|
/**
|
|
* Highlight text in text node
|
|
*
|
|
* @param DOMText $node
|
|
* @param array $wordsToHighlight
|
|
* @param callback $callback Callback method, used to transform (highlighting) text.
|
|
* @param array $params Array of additionall callback parameters (first non-optional parameter is a text to transform)
|
|
* @throws Zend_Search_Lucene_Exception
|
|
*/
|
|
protected function _highlightTextNode(DOMText $node, $wordsToHighlight, $callback, $params)
|
|
{
|
|
/** Zend_Search_Lucene_Analysis_Analyzer */
|
|
require_once 'Zend/Search/Lucene/Analysis/Analyzer.php';
|
|
|
|
$analyzer = Zend_Search_Lucene_Analysis_Analyzer::getDefault();
|
|
$analyzer->setInput($node->nodeValue, 'UTF-8');
|
|
|
|
$matchedTokens = array();
|
|
|
|
while (($token = $analyzer->nextToken()) !== null) {
|
|
if (isset($wordsToHighlight[$token->getTermText()])) {
|
|
$matchedTokens[] = $token;
|
|
}
|
|
}
|
|
|
|
if (count($matchedTokens) == 0) {
|
|
return;
|
|
}
|
|
|
|
$matchedTokens = array_reverse($matchedTokens);
|
|
|
|
foreach ($matchedTokens as $token) {
|
|
// Cut text after matched token
|
|
$node->splitText($token->getEndOffset());
|
|
|
|
// Cut matched node
|
|
$matchedWordNode = $node->splitText($token->getStartOffset());
|
|
|
|
// Retrieve HTML string representation for highlihted word
|
|
$fullCallbackparamsList = $params;
|
|
array_unshift($fullCallbackparamsList, $matchedWordNode->nodeValue);
|
|
$highlightedWordNodeSetHtml = call_user_func_array($callback, $fullCallbackparamsList);
|
|
|
|
// Transform HTML string to a DOM representation and automatically transform retrieved string
|
|
// into valid XHTML (It's automatically done by loadHTML() method)
|
|
$highlightedWordNodeSetDomDocument = new DOMDocument('1.0', 'UTF-8');
|
|
$success = @$highlightedWordNodeSetDomDocument->
|
|
loadHTML('<html><head><meta http-equiv="Content-type" content="text/html; charset=UTF-8"/></head><body>'
|
|
. $highlightedWordNodeSetHtml
|
|
. '</body></html>');
|
|
if (!$success) {
|
|
require_once 'Zend/Search/Lucene/Exception.php';
|
|
throw new Zend_Search_Lucene_Exception("Error occured while loading highlighted text fragment: '$highlightedWordNodeSetHtml'.");
|
|
}
|
|
$highlightedWordNodeSetXpath = new DOMXPath($highlightedWordNodeSetDomDocument);
|
|
$highlightedWordNodeSet = $highlightedWordNodeSetXpath->query('/html/body')->item(0)->childNodes;
|
|
|
|
for ($count = 0; $count < $highlightedWordNodeSet->length; $count++) {
|
|
$nodeToImport = $highlightedWordNodeSet->item($count);
|
|
$node->parentNode->insertBefore($this->_doc->importNode($nodeToImport, true /* deep copy */),
|
|
$matchedWordNode);
|
|
}
|
|
|
|
$node->parentNode->removeChild($matchedWordNode);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* highlight words in content of the specified node
|
|
*
|
|
* @param DOMNode $contextNode
|
|
* @param array $wordsToHighlight
|
|
* @param callback $callback Callback method, used to transform (highlighting) text.
|
|
* @param array $params Array of additionall callback parameters (first non-optional parameter is a text to transform)
|
|
*/
|
|
protected function _highlightNodeRecursive(DOMNode $contextNode, $wordsToHighlight, $callback, $params)
|
|
{
|
|
$textNodes = array();
|
|
|
|
if (!$contextNode->hasChildNodes()) {
|
|
return;
|
|
}
|
|
|
|
foreach ($contextNode->childNodes as $childNode) {
|
|
if ($childNode->nodeType == XML_TEXT_NODE) {
|
|
// process node later to leave childNodes structure untouched
|
|
$textNodes[] = $childNode;
|
|
} else {
|
|
// Process node if it's not a script node
|
|
if ($childNode->nodeName != 'script') {
|
|
$this->_highlightNodeRecursive($childNode, $wordsToHighlight, $callback, $params);
|
|
}
|
|
}
|
|
}
|
|
|
|
foreach ($textNodes as $textNode) {
|
|
$this->_highlightTextNode($textNode, $wordsToHighlight, $callback, $params);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Standard callback method used to highlight words.
|
|
*
|
|
* @param string $stringToHighlight
|
|
* @return string
|
|
* @internal
|
|
*/
|
|
public function applyColour($stringToHighlight, $colour)
|
|
{
|
|
return '<b style="color:black;background-color:' . $colour . '">' . $stringToHighlight . '</b>';
|
|
}
|
|
|
|
/**
|
|
* Highlight text with specified color
|
|
*
|
|
* @param string|array $words
|
|
* @param string $colour
|
|
* @return string
|
|
*/
|
|
public function highlight($words, $colour = '#66ffff')
|
|
{
|
|
return $this->highlightExtended($words, array($this, 'applyColour'), array($colour));
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Highlight text using specified View helper or callback function.
|
|
*
|
|
* @param string|array $words Words to highlight. Words could be organized using the array or string.
|
|
* @param callback $callback Callback method, used to transform (highlighting) text.
|
|
* @param array $params Array of additionall callback parameters passed through into it
|
|
* (first non-optional parameter is an HTML fragment for highlighting)
|
|
* @return string
|
|
* @throws Zend_Search_Lucene_Exception
|
|
*/
|
|
public function highlightExtended($words, $callback, $params = array())
|
|
{
|
|
/** Zend_Search_Lucene_Analysis_Analyzer */
|
|
require_once 'Zend/Search/Lucene/Analysis/Analyzer.php';
|
|
|
|
if (!is_array($words)) {
|
|
$words = array($words);
|
|
}
|
|
|
|
$wordsToHighlightList = array();
|
|
$analyzer = Zend_Search_Lucene_Analysis_Analyzer::getDefault();
|
|
foreach ($words as $wordString) {
|
|
$wordsToHighlightList[] = $analyzer->tokenize($wordString);
|
|
}
|
|
$wordsToHighlight = call_user_func_array('array_merge', $wordsToHighlightList);
|
|
|
|
if (count($wordsToHighlight) == 0) {
|
|
return $this->_doc->saveHTML();
|
|
}
|
|
|
|
$wordsToHighlightFlipped = array();
|
|
foreach ($wordsToHighlight as $id => $token) {
|
|
$wordsToHighlightFlipped[$token->getTermText()] = $id;
|
|
}
|
|
|
|
if (!is_callable($callback)) {
|
|
require_once 'Zend/Search/Lucene/Exception.php';
|
|
throw new Zend_Search_Lucene_Exception('$viewHelper parameter mast be a View Helper name, View Helper object or callback.');
|
|
}
|
|
|
|
$xpath = new DOMXPath($this->_doc);
|
|
|
|
$matchedNodes = $xpath->query("/html/body");
|
|
foreach ($matchedNodes as $matchedNode) {
|
|
$this->_highlightNodeRecursive($matchedNode, $wordsToHighlightFlipped, $callback, $params);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Get HTML
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getHTML()
|
|
{
|
|
return $this->_doc->saveHTML();
|
|
}
|
|
|
|
/**
|
|
* Get HTML body
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getHtmlBody()
|
|
{
|
|
$xpath = new DOMXPath($this->_doc);
|
|
$bodyNodes = $xpath->query('/html/body')->item(0)->childNodes;
|
|
|
|
$outputFragments = array();
|
|
for ($count = 0; $count < $bodyNodes->length; $count++) {
|
|
$outputFragments[] = $this->_doc->saveXML($bodyNodes->item($count));
|
|
}
|
|
|
|
return implode($outputFragments);
|
|
}
|
|
}
|
|
|