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<?php
namespace Gt\Dom;
use DOMText;
use Gt\Dom\Exception\IndexSizeException;
use Gt\PropFunc\MagicProp;
/**
* The Text interface represents the textual content of Element or Attr.
*
* If an element has no markup within its content, it has a single child
* implementing Text that contains the element's text. However, if the element
* contains markup, it is parsed into information items and Text nodes that
* form its children.
*
* New documents have a single Text node for each block of text. Over time,
* more Text nodes may be created as the document's content changes. The
* Node.normalize() method merges adjacent Text objects back into a single node
* for each block of text.
*
* @link https://developer.mozilla.org/en-US/docs/Web/API/Text
*
* @property-read bool $isElementContentWhitespace Returns a Boolean flag indicating whether or not the text node contains only whitespace.
* @property-read string $wholeText Returns a DOMString containing the text of all Text nodes logically adjacent to this Node, concatenated in document order.
*/
class Text extends DOMText {
use MagicProp;
use RegisteredNodeClass;
use ChildNode;
/** @link https://developer.mozilla.org/en-US/docs/Web/API/Text/isElementContentWhitespace */
protected function __prop_get_isElementContentWhitespace():bool {
return strlen(trim($this->textContent)) === 0;
}
/**
* The Text.splitText() method breaks the Text node into two nodes at
* the specified offset, keeping both nodes in the tree as siblings.
*
* After the split, the current node contains all the content up to the
* specified offset point, and a newly created node of the same type
* contains the remaining text. The newly created node is returned to
* the caller. If the original node had a parent, the new node is
* inserted as the next sibling of the original node. If the offset is
* equal to the length of the original node, the newly created node has
* no data.
*
* Separated text nodes can be concatenated using the Node.normalize()
* method.
*
* @param int $offset The index immediately before which to break the
* text node.
* @return Text Returns a newly created Text node that contains the
* text after the specified offset point.
* @link https://developer.mozilla.org/en-US/docs/Web/API/Text/splitText
*/
public function splitText(int $offset):Text {
if($offset > strlen($this->textContent)
|| $offset < 0) {
throw new IndexSizeException("Index or size is negative or greater than the allowed amount");
}
$substr = substr($this->data, $offset);
$this->data = substr($this->data, 0, $offset);
/** @var Text $newNode */
$newNode = $this->ownerDocument->createTextNode($substr);
if($this->parentNode) {
/** @var Text $newNode */
$newNode = $this->parentNode->insertBefore($newNode, $this->nextSibling);
}
return $newNode;
}
}