silverstripe-framework/src/Forms/HTMLEditor/HTMLEditorField.php

<?php

namespace SilverStripe\Forms\HTMLEditor;

use SilverStripe\Assets\Image;
use SilverStripe\Core\Injector\Injector;
use SilverStripe\Forms\TextareaField;
use SilverStripe\ORM\DataObject;
use SilverStripe\ORM\DataObjectInterface;
use Exception;

/**
 * A TinyMCE-powered WYSIWYG HTML editor field with image and link insertion and tracking capabilities. Editor fields
 * are created from <textarea> tags, which are then converted with JavaScript.
 *
 * Caution: The form field does not include any JavaScript or CSS when used outside of the CMS context,
 * since the required frontend dependencies are included through CMS bundling.
 */
class HTMLEditorField extends TextareaField {

	private static $casting = [
		'Value' => 'HTMLText',
	];

	/**
	 * Use TinyMCE's GZIP compressor
	 *
	 * @config
	 * @var bool
	 */
	private static $use_gzip = true;

	/**
	 * Should we check the valid_elements (& extended_valid_elements) rules from HTMLEditorConfig server side?
	 *
	 * @config
	 * @var bool
	 */
	private static $sanitise_server_side = false;

	/**
	 * Number of rows
	 *
	 * @config
	 * @var int
	 */
	private static $default_rows = 30;

	/**
	 * ID or instance of editorconfig
	 *
	 * @var string|HTMLEditorConfig
	 */
	protected $editorConfig = null;

	/**
	 * Gets the HTMLEditorConfig instance
	 *
	 * @return HTMLEditorConfig
	 */
	public function getEditorConfig() {
		// Instance override
		if($this->editorConfig instanceof HTMLEditorConfig) {
			return $this->editorConfig;
		}

		// Get named / active config
		return HTMLEditorConfig::get($this->editorConfig);
	}

	/**
	 * Assign a new configuration instance or identifier
	 *
	 * @param string|HTMLEditorConfig $config
	 * @return $this
	 */
	public function setEditorConfig($config) {
		$this->editorConfig = $config;
		return $this;
	}

	/**
	 * Creates a new HTMLEditorField.
	 * @see TextareaField::__construct()
	 *
	 * @param string $name The internal field name, passed to forms.
	 * @param string $title The human-readable field label.
	 * @param mixed $value The value of the field.
	 * @param string $config HTMLEditorConfig identifier to be used. Default to the active one.
	 */
	public function __construct($name, $title = null, $value = '', $config = null) {
		parent::__construct($name, $title, $value);

		if($config) {
			$this->setEditorConfig($config);
		}

		$this->setRows($this->config()->default_rows);
	}

	public function getAttributes() {
		return array_merge(
			parent::getAttributes(),
			$this->getEditorConfig()->getAttributes()
		);
	}

	/**
	 * @param DataObject|DataObjectInterface $record
	 * @throws Exception
	 */
	public function saveInto(DataObjectInterface $record) {
		if($record->hasField($this->name) && $record->escapeTypeForField($this->name) != 'xml') {
			throw new Exception (
				'HTMLEditorField->saveInto(): This field should save into a HTMLText or HTMLVarchar field.'
			);
		}

		// Sanitise if requested
		$htmlValue = Injector::inst()->create('HTMLValue', $this->Value());
		if($this->config()->sanitise_server_side) {
			$santiser = HTMLEditorSanitiser::create(HTMLEditorConfig::get_active());
			$santiser->sanitise($htmlValue);
		}

		// optionally manipulate the HTML after a TinyMCE edit and prior to a save
		$this->extend('processHTML', $htmlValue);

		// Store into record
		$record->{$this->name} = $htmlValue->getContent();
	}

	public function setValue($value) {
		// Regenerate links prior to preview, so that the editor can see them.
		$value = Image::regenerate_html_links($value);
		return parent::setValue($value);
	}

	/**
	 * @return HTMLEditorField_Readonly
	 */
	public function performReadonlyTransformation() {
		return $this->castedCopy('SilverStripe\\Forms\\HTMLEditor\\HTMLEditorField_Readonly');
	}

	public function performDisabledTransformation() {
		return $this->performReadonlyTransformation();
	}

	public function Field($properties = array()) {
		// Include requirements
		$this->getEditorConfig()->init();
		return parent::Field($properties);
	}
}