<?php
/*
Plugin Name: TinyMCE Advanced
Plugin URI: http://www.laptoptips.ca/projects/tinymce-advanced/
Description: Enables advanced features and plugins in TinyMCE, the visual editor in WordPress.
Version: 5.0.1
Author: Andrew Ozz
Author URI: http://www.laptoptips.ca/
License: GPL2
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: tinymce-advanced


TinyMCE Advanced is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
any later version.

TinyMCE Advanced is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License along
with TinyMCE Advanced or WordPress. If not, see https://www.gnu.org/licenses/gpl-2.0.html.

Copyright (c) 2007-2019 Andrew Ozz. All rights reserved.
*/

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists('Tinymce_Advanced') ) :

class Tinymce_Advanced {

	private $required_version = '4.9.6';
	private $plugin_version = '5.0.0';

	private $user_settings;
	private $admin_settings;
	private $admin_options;
	private $editor_id;
	private $disabled_for_editor = false;

	private $plugins;
	private $options;
	private $toolbar_1;
	private $toolbar_2;
	private $toolbar_3;
	private $toolbar_4;
	private $used_buttons = array();
	private $all_buttons = array();
	private $buttons_filter = array();
	private $fontsize_formats = '8px 10px 12px 14px 16px 20px 24px 28px 32px 36px 48px 60px 72px 96px';
	private $required_menubar_plugins = array(
		'anchor',
		'code',
		'insertdatetime',
		'nonbreaking',
		'print',
		'searchreplace',
		'table',
		'visualblocks',
		'visualchars'
	);

	private function get_default_user_settings() {
		return array(
			'options'	=> 'menubar,advlist,menubar_block,merge_toolbars',
			'plugins'   => 'anchor,code,insertdatetime,nonbreaking,print,searchreplace,table,visualblocks,visualchars,advlist,wptadv',
			'toolbar_1' => 'formatselect,bold,italic,blockquote,bullist,numlist,alignleft,aligncenter,alignright,link,unlink,undo,redo',
			'toolbar_2' => 'fontselect,fontsizeselect,outdent,indent,pastetext,removeformat,charmap,wp_more,forecolor,table,wp_help',
			'toolbar_3' => '',
			'toolbar_4' => '',

			'toolbar_classic_block' => 'formatselect,bold,italic,blockquote,bullist,numlist,alignleft,aligncenter,alignright,link,forecolor,backcolor,table,wp_help',
			'toolbar_block' => 'core/bold,core/italic,core/link,tadv/removeformat',
			'toolbar_block_side' => 'core/code,tadv/mark,tadv/sup,tadv/sub',
			'panels_block' => 'tadv/color-panel,tadv/background-color-panel',
		);
	}

	private function get_default_admin_settings() {
		return array(
			'options' => 'hybrid_mode,classic_paragraph_block',
		);
	}

	private function get_all_plugins() {
		return array(
			'advlist',
			'anchor',
			'code',
			'contextmenu',
			'emoticons',
			'importcss',
			'insertdatetime',
			'link',
			'nonbreaking',
			'print',
			'searchreplace',
			'table',
			'visualblocks',
			'visualchars',
			'wptadv',
		);
	}

	private function get_all_user_options() {
		return array(
			'advlist',
			'advlink',
			'contextmenu',
			'menubar',
			'menubar_block',
			'fontsize_formats',
			'merge_toolbars',
		);
	}

	private function get_all_admin_options() {
		return array(
			'importcss',
			'no_autop',
			'paste_images',
			'hybrid_mode',
			'classic_paragraph_block',
			'replace_block_editor',
		);
	}

	private function get_editor_locations() {
		return array(
			'edit_post_screen',
			'rest_of_wpadmin',
			'on_front_end',
		);
	}

	private function get_all_block_buttons() {
		$block_buttons = array(
			'core/bold'   => array( 'name' => 'Bold', 'icon' => '<span class="dashicons dashicons-editor-bold"></span>' ),
			'core/italic' => array( 'name' => 'Italic', 'icon' => '<span class="dashicons dashicons-editor-italic"></span>' ),
			'core/link'   => array( 'name' => 'Insert/edit link', 'icon' => '<span class="dashicons dashicons-admin-links"></span>' ),
			'core/strikethrough' => array( 'name' => 'Strikethrough', 'icon' => '<span class="dashicons dashicons-editor-strikethrough"></span>' ),
			'core/code'   => array( 'name' => 'Code', 'icon' => '<span class="dashicons dashicons-editor-code"></span>' ),

			'tadv/mark'   => array( 'name' => 'Mark', 'icon' => '<span class="dashicons dashicons-editor-textcolor"></span>' ),
			'tadv/removeformat' => array( 'name' => 'Clear formatting', 'icon' => '<span class="dashicons dashicons-editor-removeformatting"></span>' ),
			'tadv/sup'    => array( 'name' => 'Superscript', 'icon' => '<span class="mce-ico mce-i-superscript"></span>' ),
			'tadv/sub'    => array( 'name' => 'Subscript', 'icon' => '<span class="mce-ico mce-i-subscript"></span>' ),
			'tadv/underline' => array( 'name' => 'Underline', 'icon' => '<span class="dashicons dashicons-editor-underline"></span>' ),
		);

		$this->all_block_buttons = $block_buttons;
		$this->block_buttons_filter = array_keys( $block_buttons );

		return $block_buttons;
	}

	private function get_all_block_panels() {
		return array(
			'tadv/color-panel',
			'tadv/background-color-panel',
		);
	}

	public function __construct() {
		register_activation_hook( __FILE__, array( $this, 'check_plugin_version' ) );

		if ( is_admin() ) {
			add_action( 'admin_menu', array( $this, 'add_menu' ) );
			add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
			add_action( 'plugins_loaded', array( $this, 'load_textdomain' ) );
			add_filter( 'plugin_action_links', array( $this, 'add_settings_link' ), 10, 2 );
			add_action( 'before_wp_tiny_mce', array( $this, 'show_version_warning' ) );
		}

		add_filter( 'wp_editor_settings', array( $this, 'disable_for_editor' ), 10, 2 );

		add_filter( 'mce_buttons', array( $this, 'mce_buttons_1' ), 999, 2 );
		add_filter( 'mce_buttons_2', array( $this, 'mce_buttons_2' ), 999, 2 );
		add_filter( 'mce_buttons_3', array( $this, 'mce_buttons_3' ), 999, 2 );
		add_filter( 'mce_buttons_4', array( $this, 'mce_buttons_4' ), 999, 2 );

		add_filter( 'tiny_mce_before_init', array( $this, 'mce_options' ), 10, 2 );
		add_filter( 'mce_external_plugins', array( $this, 'mce_external_plugins' ), 999 );
		add_filter( 'tiny_mce_plugins', array( $this, 'tiny_mce_plugins' ), 999 );

		add_action( 'enqueue_block_editor_assets', array( $this, 'block_editor_assets' ), 20 );

		add_action( 'init', array( $this, 'block_editor_init' ) );

		add_filter( 'wp_insert_post_data', array( $this, 'filter_post_content' ), 1 );
	}

	public function disable_for_editor( $settings, $editor_id ) {
		static $editor_style_added = false;

		if ( empty( $this->admin_settings ) ) {
			$this->load_settings();
		}

		$this->disabled_for_editor = false;
		$this->editor_id = $editor_id;

		if ( ! empty( $this->admin_settings['disabled_editors'] ) ) {
			$disabled_editors = explode( ',', $this->admin_settings['disabled_editors'] );
			$current_screen = isset( $GLOBALS['current_screen'] ) ? $GLOBALS['current_screen'] : new stdClass;

			if ( is_admin() ) {
				if ( $editor_id === 'content' && ( $current_screen->id === 'post' || $current_screen->id === 'page' ) ) {
					if ( in_array( 'edit_post_screen', $disabled_editors, true ) ) {
						$this->disabled_for_editor = true;
					}
				} elseif ( in_array( 'rest_of_wpadmin', $disabled_editors, true ) ) {
					$this->disabled_for_editor = true;
				}
			} elseif ( in_array( 'on_front_end', $disabled_editors, true ) ) {
				$this->disabled_for_editor = true;
			}
		}

		if ( ! $this->disabled_for_editor && ! $editor_style_added ) {
			if ( $this->check_admin_setting( 'importcss' ) && $this->has_editor_style() === false ) {
				add_editor_style();
			}

			$editor_style_added = true;
		}

		return $settings;
	}

	private function is_disabled() {
		return $this->disabled_for_editor;
	}

	private function has_editor_style() {
		if ( ! current_theme_supports( 'editor-style' ) ) {
			return false;
		}

		$editor_stylesheets = get_editor_stylesheets();

		if ( is_array( $editor_stylesheets ) ) {
			foreach ( $editor_stylesheets as $url ) {
				if ( strpos( $url, 'editor-style.css' ) !== false ) {
					return $url;
				}
			}
		}

		return '';
	}

	public function load_textdomain() {
	    load_plugin_textdomain( 'tinymce-advanced', false, 'tinymce-advanced/langs' );
	}

	public function enqueue_scripts( $page ) {
		if ( 'settings_page_tinymce-advanced' === $page ) {
			$plugin_url = plugin_dir_url( __FILE__ );

			wp_enqueue_script( 'tadv-js', $plugin_url . 'js/tadv.js', array( 'jquery-ui-sortable' ), $this->plugin_version, true );
			wp_enqueue_style( 'tadv-mce-skin', includes_url( 'js/tinymce/skins/lightgray/skin.min.css' ), array(), $this->plugin_version );
			wp_enqueue_style( 'tadv-css', $plugin_url . 'css/tadv-styles.css', array( 'editor-buttons' ), $this->plugin_version );

			add_action( 'admin_footer', array( $this, 'load_mce_translation' ) );
		}
	}

	public function load_mce_translation() {
		if ( ! class_exists( '_WP_Editors' ) ) {
			require( ABSPATH . WPINC . '/class-wp-editor.php' );
		}

		?>
		<script>var tadvTranslation = <?php echo _WP_Editors::wp_mce_translation( '', true ); ?>;</script>
		<?php
	}

	public function load_settings() {
		if ( empty( $this->admin_settings ) ) {
			$this->admin_settings = get_option( 'tadv_admin_settings', false );
		}

		if ( empty( $this->user_settings ) ) {
			$this->user_settings = get_option( 'tadv_settings', false );
		}

		// load defaults if the options don't exist...
		if ( $this->admin_settings === false ) {
			$this->admin_settings = $this->get_default_admin_settings();
		}

		$this->admin_options = ! empty( $this->admin_settings['options'] ) ? explode( ',', $this->admin_settings['options'] ) : array();

		$default_user_settings = $this->get_default_user_settings();

		if ( $this->user_settings === false ) {
			$this->user_settings = $default_user_settings;
		}

		if ( empty( $this->user_settings['toolbar_1'] ) ) {
			$this->user_settings['toolbar_1'] = $default_user_settings['toolbar_1'];
		}

		if ( empty( $this->user_settings['toolbar_classic_block'] ) ) {
			$this->user_settings['toolbar_classic_block'] = $default_user_settings['toolbar_classic_block'];
		}

		if ( empty( $this->user_settings['toolbar_block'] ) ) {
			$this->user_settings['toolbar_block'] = $default_user_settings['toolbar_block'];
		}

		$this->options   = ! empty( $this->user_settings['options'] )   ? explode( ',', $this->user_settings['options'] )   : array();
		$this->plugins   = ! empty( $this->user_settings['plugins'] )   ? explode( ',', $this->user_settings['plugins'] )   : array();
		$this->toolbar_1 = ! empty( $this->user_settings['toolbar_1'] ) ? explode( ',', $this->user_settings['toolbar_1'] ) : array();
		$this->toolbar_2 = ! empty( $this->user_settings['toolbar_2'] ) ? explode( ',', $this->user_settings['toolbar_2'] ) : array();
		$this->toolbar_3 = ! empty( $this->user_settings['toolbar_3'] ) ? explode( ',', $this->user_settings['toolbar_3'] ) : array();
		$this->toolbar_4 = ! empty( $this->user_settings['toolbar_4'] ) ? explode( ',', $this->user_settings['toolbar_4'] ) : array();
		$this->toolbar_classic_block = ! empty( $this->user_settings['toolbar_classic_block'] ) ? explode( ',', $this->user_settings['toolbar_classic_block'] ) : array();

		$this->toolbar_block =      ! empty( $this->user_settings['toolbar_block'] )      ? explode( ',', $this->user_settings['toolbar_block'] )      : array();
		$this->toolbar_block_side = ! empty( $this->user_settings['toolbar_block_side'] ) ? explode( ',', $this->user_settings['toolbar_block_side'] ) : array();
		$this->panels_block =       ! empty( $this->user_settings['panels_block'] )       ? explode( ',', $this->user_settings['panels_block'] )       : array();

		$this->used_buttons = array_merge( $this->toolbar_1, $this->toolbar_2, $this->toolbar_3, $this->toolbar_4, $this->toolbar_classic_block );
		$this->used_block_buttons = array_merge( $this->toolbar_block, $this->toolbar_block_side );
		$this->get_all_buttons();

		// Force refresh after activation.
		if ( ! empty( $GLOBALS['tinymce_version'] ) && strpos( $GLOBALS['tinymce_version'], '-tadv-' ) === false ) {
			$GLOBALS['tinymce_version'] .= '-tadv-' . $this->plugin_version;
		}
	}

	public function show_version_warning() {
		if ( is_admin() && current_user_can( 'update_plugins' ) && get_current_screen()->base === 'post' ) {
			$this->warn_if_unsupported();
		}
	}

	public function warn_if_unsupported() {
		if ( ! $this->check_minimum_supported_version() ) {
			$wp_ver = ! empty( $GLOBALS['wp_version'] ) ? $GLOBALS['wp_version'] : '(undefined)';

			?>
			<div class="error notice is-dismissible"><p>
			<?php

			printf( __( 'TinyMCE Advanced requires WordPress version %1$s or newer. It appears that you are running %2$s. This can make the editor unstable.', 'tinymce-advanced' ),
				$this->required_version,
				esc_html( $wp_ver )
			);

			echo '<br>';

			printf( __( 'Please upgrade your WordPress installation or download an <a href="%s">older version of the plugin</a>.', 'tinymce-advanced' ),
				'https://wordpress.org/plugins/tinymce-advanced/advanced/#download-previous-link'
			);

			?>
			</p></div>
			<?php
		}
	}

	// Min version
	private function check_minimum_supported_version() {
		include( ABSPATH . WPINC . '/version.php' ); // get an unmodified $wp_version
		$wp_version = str_replace( '-src', '', $wp_version );

		return ( version_compare( $wp_version, $this->required_version, '>=' ) );
	}

	public function check_plugin_version() {
		$version = get_option( 'tadv_version', 0 );

		if ( ! $version || $version < 4000 ) {
			// First install or upgrade to TinyMCE 4.0
			$this->user_settings = $this->get_default_user_settings();
			$this->admin_settings = $this->get_default_admin_settings();

			update_option( 'tadv_settings', $this->user_settings );
			update_option( 'tadv_admin_settings', $this->admin_settings );
			update_option( 'tadv_version', 5000 );
		} elseif ( $version < 5000 ) {
			// Update for WP 5.0
			$admin_settings = get_option( 'tadv_admin_settings', false );
			$user_settings = get_option( 'tadv_settings', false );
			$user_defaults = $this->get_default_user_settings();

			$admin = $admin_settings['options'];
			$user = $user_settings['options'];

			if ( empty( $admin ) ) {
				$admin = 'hybrid_mode,classic_paragraph_block';
			} elseif ( strpos( $admin, 'no_hybrid_mode' ) !== false ) {
				$admin = str_replace( 'no_hybrid_mode', 'classic_paragraph_block', $admin );
			} else {
				$admin .= ',hybrid_mode,classic_paragraph_block';
			}

			if ( empty( $user ) ) {
				$user = 'menubar_block,merge_toolbars';
			} elseif ( strpos( $user, 'no_merge_toolbars' ) !== false ) {
				$user = str_replace( 'no_merge_toolbars', 'menubar_block', $user );
			} else {
				$user .= ',menubar_block,merge_toolbars';
			}

			if ( empty( $user_settings['toolbar_block'] ) ) {
				$user_settings['toolbar_block'] = $user_defaults['toolbar_block'];
				$user_settings['toolbar_block_side'] = $user_defaults['toolbar_block_side'];
				$user_settings['panels_block'] = $user_defaults['panels_block'];
			}

			$admin_settings['options'] = $admin;
			$user_settings['options'] = $user;

			update_option( 'tadv_admin_settings', $admin_settings );
			update_option( 'tadv_settings', $user_settings );
			update_option( 'tadv_version', 5000 );
		}

		if ( $version < 4000 ) {
			// Upgrade to TinyMCE 4.0, clean options
			delete_option('tadv_options');
			delete_option('tadv_toolbars');
			delete_option('tadv_plugins');
			delete_option('tadv_btns1');
			delete_option('tadv_btns2');
			delete_option('tadv_btns3');
			delete_option('tadv_btns4');
			delete_option('tadv_allbtns');
		}
	}

	public function get_all_buttons() {
		if ( ! empty( $this->all_buttons ) ) {
			return $this->all_buttons;
		}

		$buttons = array(
			// Core
			'bold' => 'Bold',
			'italic' => 'Italic',
			'underline' => 'Underline',
			'strikethrough' => 'Strikethrough',
			'alignleft' => 'Align left',
			'aligncenter' => 'Align center',
			'alignright' => 'Align right',
			'alignjustify' => 'Justify',
			'styleselect' => 'Formats',
			'formatselect' => 'Paragraph',
			'fontselect' => 'Font Family',
			'fontsizeselect' => 'Font Sizes',
			'cut' => 'Cut',
			'copy' => 'Copy',
			'paste' => 'Paste',
			'bullist' => 'Bulleted list',
			'numlist' => 'Numbered list',
			'outdent' => 'Decrease indent',
			'indent' => 'Increase indent',
			'blockquote' => 'Blockquote',
			'undo' => 'Undo',
			'redo' => 'Redo',
			'removeformat' => 'Clear formatting',
			'subscript' => 'Subscript',
			'superscript' => 'Superscript',

			// From plugins
			'hr' => 'Horizontal line',
			'link' => 'Insert/edit link',
			'unlink' => 'Remove link',
			'image' => 'Insert/edit image',
			'charmap' => 'Special character',
			'pastetext' => 'Paste as text',
			'print' => 'Print',
			'anchor' => 'Anchor',
			'searchreplace' => 'Find and replace',
			'visualblocks' => 'Show blocks',
			'visualchars' => 'Show invisible characters',
			'code' => 'Source code',
			'wp_code' => 'Code',
			'fullscreen' => 'Fullscreen',
			'insertdatetime' => 'Insert date/time',
			'media' => 'Insert/edit video',
			'nonbreaking' => 'Nonbreaking space',
			'table' => 'Table',
			'ltr' => 'Left to right',
			'rtl' => 'Right to left',
			'emoticons' => 'Emoticons',
			'forecolor' => 'Text color',
			'backcolor' => 'Background color',

			// WP
			'wp_adv'		=> 'Toolbar Toggle',
			'wp_help'		=> 'Keyboard Shortcuts',
			'wp_more'		=> 'Read more...',
			'wp_page'		=> 'Page break',

			'tadv_mark'     => 'Mark',
		);

		// add/remove allowed buttons
		$buttons = apply_filters( 'tadv_allowed_buttons', $buttons );

		$this->all_buttons = $buttons;
		$this->buttons_filter = array_keys( $buttons );
		return $buttons;
	}

	public function get_plugins( $plugins = array() ) {

		if ( ! is_array( $this->used_buttons ) ) {
			$this->load_settings();
		}

		if ( in_array( 'anchor', $this->used_buttons, true ) )
			$plugins[] = 'anchor';

		if ( in_array( 'visualchars', $this->used_buttons, true ) )
			$plugins[] = 'visualchars';

		if ( in_array( 'visualblocks', $this->used_buttons, true ) )
			$plugins[] = 'visualblocks';

		if ( in_array( 'nonbreaking', $this->used_buttons, true ) )
			$plugins[] = 'nonbreaking';

		if ( in_array( 'emoticons', $this->used_buttons, true ) )
			$plugins[] = 'emoticons';

		if ( in_array( 'insertdatetime', $this->used_buttons, true ) )
			$plugins[] = 'insertdatetime';

		if ( in_array( 'table', $this->used_buttons, true ) )
			$plugins[] = 'table';

		if ( in_array( 'print', $this->used_buttons, true ) )
			$plugins[] = 'print';

		if ( in_array( 'searchreplace', $this->used_buttons, true ) )
			$plugins[] = 'searchreplace';

		if ( in_array( 'code', $this->used_buttons, true ) )
			$plugins[] = 'code';

		// From options
		if ( $this->check_user_setting( 'advlist' ) )
			$plugins[] = 'advlist';

		if ( $this->check_user_setting( 'advlink' ) )
			$plugins[] = 'link';

		if ( $this->check_admin_setting( 'importcss' ) )
			$plugins[] = 'importcss';

		if ( $this->check_user_setting( 'contextmenu' ) )
			$plugins[] = 'contextmenu';

		// add/remove used plugins
		$plugins = apply_filters( 'tadv_used_plugins', $plugins, $this->used_buttons );

		return array_unique( $plugins );
	}

	private function check_user_setting( $setting ) {
		if ( ! is_array( $this->options ) ) {
			$this->load_settings();
		}

		// Back-compat for 'fontsize_formats'
		if ( $setting === 'fontsize_formats' && $this->check_admin_setting( 'fontsize_formats' ) ) {
			return true;
		}

		if ( $setting === 'selected_text_color' ) {
			return in_array( 'tadv/color-panel', $this->panels_block, true );
		}

		if ( $setting === 'selected_text_background_color' ) {
			return in_array( 'tadv/background-color-panel', $this->panels_block, true );
		}

		return in_array( $setting, $this->options, true );
	}

	private function check_admin_setting( $setting ) {
		if ( ! is_array( $this->admin_options ) ) {
			$this->load_settings();
		}

		if ( strpos( $setting, 'enable_' ) === 0 ) {
			$disabled_editors = ! empty( $this->admin_settings['disabled_editors'] ) ? explode( ',', $this->admin_settings['disabled_editors'] ) : array();
			return ! in_array( str_replace( 'enable_', '', $setting ), $disabled_editors );
		}

		return in_array( $setting, $this->admin_options, true );
	}

	public function mce_buttons_1( $original, $editor_id ) {
		if ( $this->is_disabled() ) {
			return $original;
		}

		if ( ! is_array( $this->options ) ) {
			$this->load_settings();
		}

		if ( $editor_id === 'classic-block' ) {
			$buttons_1 = $this->toolbar_classic_block;
		} else {
			$buttons_1 = $this->toolbar_1;
		}

		if ( is_array( $original ) && ! empty( $original ) ) {
			$original = array_diff( $original, $this->buttons_filter );
			$buttons_1 = array_merge( $buttons_1, $original );
		}

		return $buttons_1;
	}

	public function mce_buttons_2( $original, $editor_id ) {
		if ( $this->is_disabled() ) {
			return $original;
		}

		if ( ! is_array( $this->options ) ) {
			$this->load_settings();
		}

		if ( $editor_id === 'classic-block' ) {
			$buttons_2 = array();
		} else {
			$buttons_2 = $this->toolbar_2;
		}

		if ( is_array( $original ) && ! empty( $original ) ) {
			$original = array_diff( $original, $this->buttons_filter );
			$buttons_2 = array_merge( $buttons_2, $original );
		}

		return $buttons_2;
	}

	public function mce_buttons_3( $original, $editor_id ) {
		if ( $this->is_disabled() ) {
			return $original;
		}

		if ( ! is_array( $this->options ) ) {
			$this->load_settings();
		}

		if ( $editor_id === 'classic-block' ) {
			$buttons_3 = array();
		} else {
			$buttons_3 = $this->toolbar_3;
		}

		if ( is_array( $original ) && ! empty( $original ) ) {
			$original = array_diff( $original, $this->buttons_filter );
			$buttons_3 = array_merge( $buttons_3, $original );
		}

		return $buttons_3;
	}

	public function mce_buttons_4( $original, $editor_id ) {
		if ( $this->is_disabled() ) {
			return $original;
		}

		if ( ! is_array( $this->options ) ) {
			$this->load_settings();
		}

		if ( $editor_id === 'classic-block' ) {
			$buttons_4 = array();
		} else {
			$buttons_4 = $this->toolbar_4;
		}

		if ( is_array( $original ) && ! empty( $original ) ) {
			$original = array_diff( $original, $this->buttons_filter );
			$buttons_4 = array_merge( $buttons_4, $original );
		}

		return $buttons_4;
	}

	public function mce_options( $init, $editor_id = '' ) {
		if ( $this->is_disabled() ) {
			return $init;
		}

		$init['image_advtab'] = true;
		$init['rel_list'] = '[{text: "None", value: ""}, {text: "Nofollow", value: "nofollow noreferrer"}]';
		// Prevent user errors.
		$init['removed_menuitems'] = 'newdocument';

		if ( $this->check_admin_setting( 'no_autop' ) ) {
			$init['wpautop'] = false;
			$init['indent'] = true;
			$init['tadv_noautop'] = true;
		}

		if ( $editor_id === 'classic-block' ) {
			if ( $this->check_user_setting( 'menubar_block' ) ) {
				$init['menubar'] = true;
			}

			if (
				$this->check_user_setting( 'merge_toolbars' ) &&
				! empty( $init['toolbar1'] ) &&
				is_string( $init['toolbar1'] )
			) {
				if ( ! empty( $init['toolbar2'] ) && is_string( $init['toolbar2'] ) ) {
					$init['toolbar1'] = $init['toolbar1'] . ',' . $init['toolbar2'];
					$init['toolbar2'] = '';
				}
				if ( ! empty( $init['toolbar3'] ) && is_string( $init['toolbar3'] ) ) {
					$init['toolbar1'] = $init['toolbar1'] . ',' . $init['toolbar3'];
					$init['toolbar3'] = '';
				}
				if ( ! empty( $init['toolbar4'] ) && is_string( $init['toolbar4'] ) ) {
					$init['toolbar1'] = $init['toolbar1'] . ',' . $init['toolbar4'];
					$init['toolbar4'] = '';
				}
			}
		} else {
			if ( $this->check_user_setting( 'menubar' ) ) {
				$init['menubar'] = true;
			}
		}

		if ( ! in_array( 'wp_adv', $this->toolbar_1, true ) ) {
			$init['wordpress_adv_hidden'] = false;
		}

		if ( $this->check_admin_setting( 'importcss' ) ) {
			$init['importcss_file_filter'] = 'editor-style.css';
		}

		if ( $this->check_user_setting( 'fontsize_formats' ) ) {
			$init['fontsize_formats'] =  $this->fontsize_formats;
		}

		if ( $this->check_user_setting( 'paste_images' ) ) {
			$init['paste_data_images'] = true;
		}

		if ( in_array( 'table', $this->plugins, true ) ) {
			$init['table_toolbar'] = false;

			// Remove default table styles and attributes. They should be set by the theme.
			// Note that if the table cells are resized by dragging, an inline style with the widths will still be added.
			$init['table_default_attributes'] = '{}';
			$init['table_default_styles'] = '{}';
		}

		return $init;
	}

	public function block_editor_assets() {
		$plugin_url = plugins_url( 'dist', __FILE__ );

		if ( ! is_array( $this->admin_options ) ) {
			$this->load_settings();
		}

		if ( $this->check_admin_setting( 'hybrid_mode' ) || $this->check_admin_setting( 'classic_paragraph_block' ) ) {
			$strings = array();
			$dependencies = array( 'wp-element', 'wp-components', 'wp-i18n', 'wp-keycodes', 'wp-blocks', 'wp-edit-post', 'wp-hooks', 'lodash' );
			wp_enqueue_script( 'tadv-classic-paragraph', $plugin_url . '/classic-paragraph.js', $dependencies, $this->plugin_version );

			if ( $this->check_admin_setting( 'classic_paragraph_block' ) ) {
				$strings = array(
					'classicParagraphTitle' => __( 'Classic Paragraph', 'tinymce-advanced' ),
					'classicParagraph' => 'yes',
					'description' => __( 'For use instead of the Paragraph Block. Supports transforming to and from multiple Paragraph blocks, Image, Table, List, Quote, Custom HTML, and most other blocks.', 'tinymce-advanced' ),
				);

				wp_enqueue_style( 'tadv-classic-paragraph-styles', $plugin_url . '/classic-paragraph.css', array(), $this->plugin_version );
			}

			if ( $this->check_admin_setting( 'hybrid_mode' ) ) {
				$strings['hybridMode'] = 'yes';
			}

			wp_localize_script( 'tadv-classic-paragraph', 'tadvBlockRegister', $strings );
		}

		// Block editor toolbars
		if ( ! empty( $this->toolbar_block ) ) {
			$dependencies = array( 'wp-element', 'wp-components', 'wp-i18n', 'wp-editor', 'wp-rich-text' );
			wp_enqueue_script( 'tadv-block-buttons', $plugin_url . '/richtext-buttons.js', $dependencies, $this->plugin_version );

			$all_block_buttons = $this->get_all_block_buttons();
			$all_block_buttons = array_keys( $all_block_buttons );
			$unusedButtons = array_diff( $all_block_buttons, $this->toolbar_block, $this->toolbar_block_side );

			$strings = array(
				'buttons' => implode( ',', $this->toolbar_block ),
				'panelButtons' => implode( ',', $this->toolbar_block_side ),
				'unusedButtons' => implode( ',', $unusedButtons ),
				'colorPanel' => implode( ',', $this->panels_block ),

				// Strings
				'strFormatting' => __( 'Formatting', 'tinymce-advanced' ),
				'strRemoveFormatting' => __( 'Remove formatting', 'tinymce-advanced' ),
				'strSuperscript' => __( 'Superscript', 'tinymce-advanced' ),
				'strSubscript' => __( 'Subscript', 'tinymce-advanced' ),
				'strMark' => __( 'Mark', 'tinymce-advanced' ),
				'strUnderline' => __( 'Underline', 'tinymce-advanced' ),

				'strTextColor' => __( 'Text Color', 'tinymce-advanced' ),
				'strTextColorLabel' => __( 'Selected text color', 'tinymce-advanced' ),
				'strBackgroundColor' => __( 'Text Background Color', 'tinymce-advanced' ),
				'strBackgroundColorLabel' => __( 'Selected text background color', 'tinymce-advanced' ),
			);

			wp_localize_script( 'tadv-block-buttons', 'tadvBlockButtons', $strings );

			wp_enqueue_style( 'tadv-block-buttons-styles', $plugin_url . '/richtext-buttons.css', array(), $this->plugin_version );
		}

		wp_enqueue_style( 'tadv-block-editor-styles', plugins_url( 'css/block-editor.css', __FILE__ ), array(), $this->plugin_version );
	}

	public function block_editor_init() {
		if ( $this->check_admin_setting( 'replace_block_editor' ) && ! class_exists( 'Classic_Editor' ) ) {
			add_filter( 'use_block_editor_for_post_type', '__return_false', 1000 );
		}
	}

	public function filter_post_content( $data ) {
		$content = $data['post_content'];
		// Fix for the fix to keep <p> tags inside the classic block :-(
		// $data is slashed...
		if ( strpos( $content, '<p data-tadv-p=\"keep\">' ) !== false ) {
			$content = str_replace( '<p data-tadv-p=\"keep\">', '<p>', $content );
		}

		$data['post_content'] = $content;
		return $data;
	}

	public function mce_external_plugins( $mce_plugins ) {
		if ( ! is_array( $this->options ) ) {
			$this->load_settings();
		}

		if ( $this->is_disabled() ) {
			return $mce_plugins;
		}

		if ( ! is_array( $this->plugins ) ) {
			$this->plugins = array();
		}

		$this->plugins[] = 'wptadv';

		if ( $this->check_user_setting( 'menubar' ) || $this->check_user_setting( 'menubar_block' ) ) {
			$this->plugins = array_merge( $this->plugins, $this->required_menubar_plugins );
		}

		$this->plugins = array_intersect( $this->plugins, $this->get_all_plugins() );

		$plugin_url = plugins_url( 'mce/', __FILE__ );
		$mce_plugins = (array) $mce_plugins;
		$suffix = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '' : '.min';

		foreach ( $this->plugins as $plugin ) {
			$mce_plugins["$plugin"] = $plugin_url . $plugin . "/plugin{$suffix}.js";
		}

		return $mce_plugins;
	}

	public function tiny_mce_plugins( $plugins ) {
		if ( $this->is_disabled() ) {
			return $plugins;
		}

		if ( in_array( 'image', $this->used_buttons, true ) && ! in_array( 'image', $plugins, true ) ) {
			$plugins[] = 'image';
		}

		if ( ( in_array( 'rtl', $this->used_buttons, true ) || in_array( 'ltr', $this->used_buttons, true ) ) &&
			! in_array( 'directionality', (array) $plugins, true ) ) {

			$plugins[] = 'directionality';
		}

		return $plugins;
	}

	private function parse_buttons( $toolbar_id = false, $buttons = false ) {
		if ( $toolbar_id && ! $buttons && ! empty( $_POST[$toolbar_id] ) )
			$buttons = $_POST[$toolbar_id];

		if ( is_array( $buttons ) ) {
			$_buttons = array_map( array( @$this, 'filter_name' ), $buttons );
			return implode( ',', array_filter( $_buttons ) );
		}

		return '';
	}

	private function filter_name( $str ) {
		if ( empty( $str ) || ! is_string( $str ) )
			return '';
		// Button names
		return preg_replace( '/[^a-z0-9_]/i', '', $str );
	}

	private function sanitize_settings( $settings ) {
		$_settings = array();

		if ( ! is_array( $settings ) ) {
			return $_settings;
		}

		foreach( $settings as $name => $value ) {
			$name = preg_replace( '/[^a-z0-9_]+/', '', $name );

			if ( strpos( $name, 'toolbar_' ) === 0 ) {
				$_settings[$name] = $this->parse_buttons( false, explode( ',', $value ) );
			} else if ( 'options' === $name || 'plugins' === $name || 'disabled_plugins' === $name ) {
				$_settings[$name] = preg_replace( '/[^a-z0-9_,]+/', '', $value );
			}
		}

		return $_settings;
	}

	/**
	 * Validare array of settings against a whitelist.
	 *
	 * @param array $settings The settings.
	 * @param array $checklist The whitelist.
	 * @return string The validated settings CSV.
	 */
	private function validate_settings( $settings, $checklist ) {
		if ( empty( $settings ) ) {
			return '';
		} elseif ( is_string( $settings ) ) {
			$settings = explode( ',', $settings );
		} elseif ( ! is_array( $settings ) ) {
			return '';
		}

		$_settings = array();

		foreach ( $settings as $value ) {
			if ( in_array( $value, $checklist, true ) ) {
				$_settings[] = $value;
			}
		}

		return implode( ',', $_settings );
	}

	private function save_settings( $all_settings = null ) {
		$settings = $user_settings = array();
		$default_settings = $this->get_default_user_settings();

		if ( empty( $this->buttons_filter ) ) {
			$this->get_all_buttons();
		}

		if ( ! empty( $all_settings['settings'] ) ) {
			$user_settings = $all_settings['settings'];
		}

		for ( $i = 1; $i < 6; $i++ ) {
			$toolbar_name = ( $i < 5 ) ? 'toolbar_' . $i : 'toolbar_classic_block';

			if ( ! empty( $user_settings[ $toolbar_name ] ) ) {
				$toolbar = explode( ',', $user_settings[ $toolbar_name ] );
			} elseif ( ! empty( $_POST[ $toolbar_name ] ) && is_array( $_POST[ $toolbar_name ] ) ) {
				$toolbar = $_POST[ $toolbar_name ];
			} else {
				$toolbar = array();
			}

			if ( $i > 1 && in_array( 'wp_adv', $toolbar, true ) ) {
				$toolbar = array_diff( $toolbar, array( 'wp_adv' ) );
			}

			$settings[ $toolbar_name ] = $this->validate_settings( $toolbar, $this->buttons_filter );
		}

		// Block editor toolbar
		if ( empty( $this->block_buttons_filter ) ) {
			$this->get_all_block_buttons();
		}

		if ( ! empty( $user_settings[ 'toolbar_block' ] ) ) {
			$settings[ 'toolbar_block' ] = $this->validate_settings( $user_settings[ 'toolbar_block' ], $this->block_buttons_filter );
		} elseif ( ! empty( $_POST[ 'toolbar_block' ] ) && is_array( $_POST[ 'toolbar_block' ] ) ) {
			$settings[ 'toolbar_block' ] = $this->validate_settings( $_POST[ 'toolbar_block' ], $this->block_buttons_filter );
		} else {
			$settings[ 'toolbar_block' ] = $default_settings[ 'toolbar_block' ];
		}

		if ( ! empty( $user_settings[ 'toolbar_block_side' ] ) ) {
			$settings[ 'toolbar_block_side' ] = $this->validate_settings( $user_settings[ 'toolbar_block_side' ], $this->block_buttons_filter );
		} elseif ( ! empty( $_POST[ 'toolbar_block_side' ] ) && is_array( $_POST[ 'toolbar_block_side' ] ) ) {
			$settings[ 'toolbar_block_side' ] = $this->validate_settings( $_POST[ 'toolbar_block_side' ], $this->block_buttons_filter );
		} else {
			$settings[ 'toolbar_block_side' ] = array();
		}

		if ( ! empty( $user_settings[ 'panels_block' ] ) ) {
			$panels_block = $this->validate_settings( explode( ',', $user_settings[ 'panels_block' ] ), $this->get_all_block_panels() );
		} else {
			$panels_block = array();

			if ( ! empty( $_POST[ 'selected_text_color' ] ) && $_POST[ 'selected_text_color' ] === 'yes' ) {
				$panels_block[] = 'tadv/color-panel';
			}

			if ( ! empty( $_POST[ 'selected_text_background_color' ] ) && $_POST[ 'selected_text_background_color' ] === 'yes' ) {
				$panels_block[] = 'tadv/background-color-panel';
			}

			$panels_block = implode( ',', $panels_block );
		}

		$settings[ 'panels_block' ] = $panels_block;

		if ( ! empty( $user_settings['options'] ) ) {
			$options = explode( ',', $user_settings['options'] );
		} elseif ( ! empty( $_POST['options'] ) && is_array( $_POST['options'] ) ) {
			$options = $_POST['options'];
		} else {
			$options = array();
		}

		$settings['options'] = $this->validate_settings( $options, $this->get_all_user_options() );


		if ( ! empty( $user_settings['plugins'] ) ) {
			$plugins = explode( ',', $user_settings['plugins'] );
		} else {
			$plugins = array();
		}

		if ( ! empty( $settings['options']['menubar'] ) || ! empty( $settings['options']['menubar_block'] ) ) {
			$plugins = array_merge( $plugins, $this->required_menubar_plugins );
		}

		// Merge the submitted plugins with plugins needed for the buttons.
		$this->user_settings = $settings;
		$this->load_settings();
		$plugins = $this->get_plugins( $plugins );

		$settings['plugins'] = $this->validate_settings( $plugins, $this->get_all_plugins() );

		$this->user_settings = $settings;
		$this->load_settings();

		// Save the new settings.
		update_option( 'tadv_settings', $settings );

		if ( ! is_multisite() || current_user_can( 'manage_sites' ) ) {
			$this->save_admin_settings( $all_settings );
		}
	}

	private function save_admin_settings( $all_settings = null ) {
		$admin_settings = $save_admin_settings = array();

		if ( ! empty( $all_settings['admin_settings'] ) ) {
			$admin_settings = $all_settings['admin_settings'];
		}

		if ( ! empty( $admin_settings ) ) {
			if ( ! empty( $admin_settings['options'] ) ) {
				$save_admin_settings['options'] = $this->validate_settings( $admin_settings['options'], $this->get_all_admin_options() );
			} else {
				$save_admin_settings['options'] = '';
			}

			$disabled_editors = array_intersect( $this->get_editor_locations(), explode( ',', $admin_settings['disabled_editors'] ) );
		} elseif ( isset( $_POST['tadv-save'] ) ) {
			if ( ! empty( $_POST['admin_options'] ) && is_array( $_POST['admin_options'] ) ) {
				$save_admin_settings['options'] = $this->validate_settings( $_POST['admin_options'], $this->get_all_admin_options() );
			}

			if ( ! empty( $_POST['tadv_enable_at'] ) && is_array( $_POST['tadv_enable_at'] ) ) {
				$tadv_enable_at = $_POST['tadv_enable_at'];
			} else {
				$tadv_enable_at = array();
			}

			$disabled_editors = array_diff( $this->get_editor_locations(), $tadv_enable_at );
		} else {
			return;
		}

		$save_admin_settings['disabled_editors'] = implode( ',', $disabled_editors );

		$this->admin_settings = $save_admin_settings;
		update_option( 'tadv_admin_settings', $save_admin_settings );
	}

	public function settings_page() {
		if ( ! defined( 'TADV_ADMIN_PAGE' ) ) {
			define( 'TADV_ADMIN_PAGE', true );
		}

		include_once( plugin_dir_path( __FILE__ ) . 'tadv_admin.php' );
	}

	public function add_menu() {
		add_options_page( 'TinyMCE Advanced', 'TinyMCE Advanced', 'manage_options', 'tinymce-advanced', array( $this, 'settings_page' ) );
	}

	/**
	 * Add a link to the settings page
	 */
	public function add_settings_link( $links, $file ) {
		if ( $file === 'tinymce-advanced/tinymce-advanced.php' && current_user_can( 'manage_options' ) ) {
			$settings_link = sprintf( '<a href="%s">%s</a>', admin_url( 'options-general.php?page=tinymce-advanced' ), __( 'Settings', 'tinymce-advanced' ) );
			array_unshift( $links, $settings_link );
		}

		return $links;
	}
}

new Tinymce_Advanced;
endif;
