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<?php |
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namespace CHMLib\TOCIndex; |
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use CHMLib\CHM; |
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use CHMLib\Map; |
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use DOMDocument; |
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use DOMElement; |
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use DOMXpath; |
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use Exception; |
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/** |
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* A list of items in the TOC or in the Index of an CHM file. |
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*/ |
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class Tree |
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{ |
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/** |
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* List of Item instances children of this tree. |
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* |
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* @var Item[] |
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*/ |
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protected $items; |
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/** |
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* Initializes the instance. |
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*/ |
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public function __construct() |
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{ |
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$this->items = array(); |
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} |
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/** |
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* Get the items contained in this tree. |
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* |
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* @return Item[] |
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*/ |
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public function getItems() |
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{ |
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return $this->items; |
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} |
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/** |
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* Resolve the items contained in other CHM files. |
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* |
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* @param Map $map |
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* |
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* @throws Exception Throw an Exception in case of errors. |
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*/ |
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public function resolve(Map $map) |
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{ |
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$result = array(); |
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foreach ($this->items as $item) { |
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$result = array_merge($result, $item->resolve($map)); |
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} |
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$this->items = $result; |
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} |
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/** |
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* Create a new instance starting from the whole TOC/Index source 'HTML'. |
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* |
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* @param CHM $chm The parent CHM instance. |
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* @param string $data The contents of the .hhc/.hhk file. |
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* |
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* @throws Exception Throw an Exception in case of errors. |
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* |
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* @return static |
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*/ |
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public static function fromString(CHM $chm, $data) |
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{ |
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if (!class_exists('DOMDocument', false) || !class_exists('DOMXpath', false)) { |
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throw new Exception('Missing PHP extension: php-xml'); |
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} |
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$result = new static(); |
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$data = trim((string) $data); |
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if (stripos($data, '<object') !== false) { |
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$doc = new DOMDocument(); |
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$charset = 'ISO-8859-1'; |
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if (preg_match('%^<\?xml\s+encoding\s*=\s*"([^"]+)"%i', $data, $m)) { |
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$charset = $m[1]; |
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} else { |
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if (preg_match('%<meta\s+http-equiv\s*=\s*"Content-Type"\s+content\s*=\s*"text/html;\s*charset=([^"]+)">%i', $data, $m)) { |
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$charset = $m[1]; |
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} |
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$data = '<?xml encoding="'.$charset.'">'.$data; |
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} |
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// LI elements are very often malformed/misplaced: let's remove them |
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$data = preg_replace('$</?li((\\s+[^>]*)|\\s*)>$i', '', $data); |
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if (@$doc->loadHTML($data) !== true) { |
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throw new Exception('Failed to parse the .hhc/.hhk file contents'); |
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} |
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$result->parseParentElement($chm, $doc->documentElement, 0); |
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} |
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return $result; |
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} |
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/** |
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* Depth of the found child items. |
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* |
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* @var int |
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*/ |
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protected $depth; |
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/** |
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* Parse a DOMElement and read the items/sub trees. |
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* |
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* @param CHM $chm |
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* @param DOMElement $parentElement |
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* @param int $depth |
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*/ |
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protected function parseParentElement(CHM $chm, DOMElement $parentElement, $depth) |
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{ |
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foreach ($parentElement->childNodes as $node) { |
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if ($node->nodeType === XML_ELEMENT_NODE) { |
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switch (strtolower($node->tagName)) { |
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case 'object': |
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if (strtolower($node->getAttribute('type')) === 'text/sitemap') { |
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$this->depth = $depth; |
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$this->items[] = new Item($chm, $node); |
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} |
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break; |
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case 'ul': |
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case 'ol': |
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$n = count($this->items); |
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if ($n > 0 && $depth >= $this->depth) { |
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$this->items[$n - 1]->getChildren()->parseParentElement($chm, $node, $depth + 1); |
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} else { |
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$this->parseParentElement($chm, $node, $depth + 1); |
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} |
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break; |
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default: |
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$this->parseParentElement($chm, $node, $depth + 1); |
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break; |
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} |
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} |
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} |
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1 |
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} |
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} |
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mlocati /
chm-lib
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.