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wp-content/plugins/gravityforms/includes/form-editor/renderer/class-gf-form-editor-renderer.php

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+<?php
+
+namespace Gravity_Forms\Gravity_Forms\Form_Editor\Renderer;
+
+class GF_Form_Editor_Renderer {
+
+	/**
+	 * Generates the form editor markup by calling the forms_page which runs on page load.
+	 *
+	 * @since 2.6
+	 *
+	 * @param string        $form_id     The ID of the form to generate form editor markup for.
+	 * @param \GFFormDetail $form_detail An instance of the FormDetail class
+	 * @param boolean       $echo        Whether to echo the form contents or not. Default false.
+	 *
+	 * @return string
+	 */
+	public static function render_form_editor( $form_id, $form_detail, $echo = false ) {
+		\ob_start();
+		$form_detail::forms_page( $form_id );
+		$editor = \ob_get_clean();
+
+		if ( $echo ) {
+			echo $editor; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
+		}
+
+		return \mb_convert_encoding( $editor, 'UTF-8', 'ISO-8859-1' );
+	}
+}