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<?php
namespace Gt\Dom;
use DOMDocument;
/**
* Provides access to special properties and methods not present by default
* on a regular document.
* @property-read HTMLCollection $anchors List of all of the anchors
* in the document. Anchors are <a> Elements with the `name` attribute.
* @property-read Element $body The <body> element. Returns new Element if there
* was no body in the source HTML.
* @property-read HTMLCollection $forms List of all <form> elements.
* @property-read Element $head The <head> element. Returns new Element if there
* was no head in the source HTML.
* @property-read HTMLCollection $images List of all <img> elements.
* @property-read HTMLCollection $links List of all links in the document.
* Links are <a> Elements with the `href` attribute.
* @property-read HTMLCollection $scripts List of all <script> elements.
* @property string $title The title of the document, defined using <title>.
*/
class HTMLDocument extends Document {
use LiveProperty, ParentNode;
public function __construct($document = "") {
parent::__construct($document);
if(!($document instanceof DOMDocument)) {
if(empty($document)) {
$this->fillEmptyDocumentElement();
}
else {
// loadHTML expects an ISO-8859-1 encoded string.
// http://stackoverflow.com/questions/11309194/php-domdocument-failing-to-handle-utf-8-characters
$document = mb_convert_encoding(
$document,
"HTML-ENTITIES",
"UTF-8"
);
$this->loadHTML($document);
}
}
}
public function getElementsByClassName(string $names):HTMLCollection {
return $this->documentElement->getElementsByClassName($names);
}
protected function prop_get_head():Element {
return $this->getOrCreateElement("head");
}
protected function prop_get_body():Element {
return $this->getOrCreateElement("body");
}
protected function prop_get_forms() {
return $this->getElementsByTagName("form");
}
protected function prop_get_anchors() {
return $this->querySelectorAll("a[name]");
}
protected function prop_get_images() {
return $this->getElementsByTagName("img");
}
protected function prop_get_links() {
return $this->querySelectorAll("a[href]");
}
protected function prop_get_title() {
$title = $this->head->getElementsByTagName("title")->item(0);
if(is_null($title)) {
return "";
}
else {
return $title->textContent;
}
}
protected function prop_set_title($value):void {
$title = $this->head->getElementsByTagName("title")->item(0);
if(is_null($title)) {
$title = $this->createElement("title");
$this->head->appendChild($title);
}
$title->textContent = $value;
}
private function getOrCreateElement(string $tagName):Element {
$element = $this->querySelector($tagName);
if(is_null($element)) {
$element = $this->createElement($tagName);
$this->documentElement->appendChild($element);
}
return $element;
}
private function fillEmptyDocumentElement():void {
$this->loadHTML("<!doctype html><html></html>");
$tagsToCreate = ["head", "body"];
foreach($tagsToCreate as $tag) {
$node = $this->createElement($tag);
$this->documentElement->appendChild($node);
}
}
}