index.php

<?php
/*
 * Plugin Name: Easy Smooth Scroll Links
 * Description: Adds interesting scroll animation effects to page anchors, smooth scroll and more.
 * Version: 2.23.1
 * Requires at least: 3.8
 * Tested up to: 5.7.0
 * Author: PootlePress
 * Author URI: https://pootlepress.com/
 * Text Domain: easy-smooth-scroll-links
 * License: GPLv2 or later
*/

function essl_text_domain() {
	load_plugin_textdomain( 'easy-smooth-scroll-links', false, basename( dirname( __FILE__ ) ) . '/languages' );
}

add_action( 'init', 'essl_text_domain' );

//Anchor Button to TinyMCE Editor
global $wp_version;
if ( $wp_version < 3.9 ) {
	if ( ! function_exists( 'enable_anchor_button' ) ) {
		function enable_anchor_button( $buttons ) {
			$buttons[] = 'anchor';

			return $buttons;
		}
	}
	add_filter( "mce_buttons_2", "enable_anchor_button" );
} else {
	add_action( 'init', 'anchor_button' );
	function anchor_button() {
		add_filter( "mce_external_plugins", "anchor_add_button" );
		add_filter( 'mce_buttons_2', 'anchor_register_button' );
	}

	function anchor_add_button( $plugin_array ) {
		$plugin_array['anchor'] = $dir = plugins_url( '/anchor/plugin.min.js', __FILE__ );

		return $plugin_array;
	}

	function anchor_register_button( $buttons ) {
		array_push( $buttons, 'anchor' );

		return $buttons;
	}
}

//Shortcode
if ( ! function_exists( 'essl_shortcode' ) ) {
	function essl_shortcode( $atts, $content = null ) {
		return '<a id="' . $content . '">';
	}

	add_shortcode( 'anchor', 'essl_shortcode' );
}


/*
Registering Options Page
*/
if ( ! class_exists( 'ESSLPluginOptions' ) ) :

// DEFINE PLUGIN ID
	define( 'ESSLPluginOptions_ID', 'essl-plugin-options' );
// DEFINE PLUGIN NICK
	define( 'ESSLPluginOptions_NICK', 'ESSL' );

	class ESSLPluginOptions {
		/** function/method
		 * Usage: return absolute file path
		 * Arg(1): string
		 * Return: string
		 */
		public static function file_path( $file ) {
			return plugin_dir_path( __FILE__ ) . $file;
		}

		/** function/method
		 * Usage: hooking the plugin options/settings
		 * Arg(0): null
		 * Return: void
		 */
		public static function register() {
			$settings = [
				'enable_essl_aggressive',
				'essl_speed',
				'essl_offset',
				'essl_easing',
				'essl_exclude_begin_1',
				'essl_exclude_begin_2',
				'essl_exclude_begin_3',
				'essl_exclude_begin_4',
				'essl_exclude_begin_5',
				'essl_exclude_match_1',
				'essl_exclude_match_2',
				'essl_exclude_match_3',
				'essl_exclude_match_4',
				'essl_exclude_match_5',
			];

			foreach ( $settings as $setting ) {
				register_setting( ESSLPluginOptions_ID . '_options', $setting, [
					'sanitize_callback' => [ __CLASS__, 'sanitise_setting' ],
				] );
			}
		}

		public static function sanitise_setting( $value ) {
			return esc_attr( $value );
		}

		/** function/method
		 * Usage: hooking (registering) the plugin menu
		 * Arg(0): null
		 * Return: void
		 */
		public static function menu() {
			// Create menu tab
			add_options_page( ESSLPluginOptions_NICK . ' Plugin Options', 'Easy Smooth Scroll Links', 'manage_options', ESSLPluginOptions_ID . '_options', array(
				'ESSLPluginOptions',
				'options_page'
			) );
		}

		/** function/method
		 * Usage: show options/settings form page
		 * Arg(0): null
		 * Return: void
		 */
		public static function options_page() {
			if ( ! current_user_can( 'manage_options' ) ) {
				wp_die( __( 'You do not have sufficient permissions to access this page.' ) );
			}

			$plugin_id = ESSLPluginOptions_ID;
			// display options page
			include( self::file_path( 'options.php' ) );
		}

	}


	// Add settings link on plugin page
	function essl_plugin_action_links( $links ) {
		$settings_link = '<a href="options-general.php?page=essl-plugin-options_options">' . __( 'Settings', 'easy-smooth-scroll-links' ) . '</a>';
		array_unshift( $links, $settings_link );

		return $links;
	}

	$plugin = plugin_basename( __FILE__ );
	add_filter( "plugin_action_links_$plugin", 'essl_plugin_action_links' );


	if ( is_admin() ) {
		add_action( 'admin_init', array( 'ESSLPluginOptions', 'register' ) );
		add_action( 'admin_menu', array( 'ESSLPluginOptions', 'menu' ) );

	}

	if ( ! is_admin() ) {

		add_action( 'wp_enqueue_scripts', 'essl_enqueue_jquery', 999 );
		add_action( 'wp_footer', 'essl_script', 100 );


		function essl_enqueue_jquery() {
			wp_deregister_script( 'jquery-easing' );
			wp_register_script( 'jquery-easing', '//cdnjs.cloudflare.com/ajax/libs/jquery-easing/1.4.1/jquery.easing.min.js' );
			wp_enqueue_script( 'jquery' );
			wp_enqueue_script( 'jquery-easing', array( 'jquery' ) );
		}

		function essl_script() {
			$essl_exclude_begin_1 = $essl_exclude_begin_2 = $essl_exclude_begin_3 = $essl_exclude_begin_4 = $essl_exclude_begin_5 = $essl_exclude_match_1 = $essl_exclude_match_2 = $essl_exclude_match_3 = $essl_exclude_match_4 = $essl_exclude_match_5 = '';
			if ( get_option( 'essl_exclude_begin_1' ) ) {
				$essl_exclude_begin_1 = ":not([href^='" . get_option( 'essl_exclude_begin_1' ) . "'])";
			}
			if ( get_option( 'essl_exclude_begin_2' ) ) {
				$essl_exclude_begin_2 = ":not([href^='" . get_option( 'essl_exclude_begin_2' ) . "'])";
			}
			if ( get_option( 'essl_exclude_begin_3' ) ) {
				$essl_exclude_begin_3 = ":not([href^='" . get_option( 'essl_exclude_begin_3' ) . "'])";
			}
			if ( get_option( 'essl_exclude_begin_4' ) ) {
				$essl_exclude_begin_4 = ":not([href^='" . get_option( 'essl_exclude_begin_4' ) . "'])";
			}
			if ( get_option( 'essl_exclude_begin_5' ) ) {
				$essl_exclude_begin_5 = ":not([href^='" . get_option( 'essl_exclude_begin_5' ) . "'])";
			}
			if ( get_option( 'essl_exclude_match_1' ) ) {
				$essl_exclude_match_1 = ":not([href='" . get_option( 'essl_exclude_match_1' ) . "'])";
			}
			if ( get_option( 'essl_exclude_match_2' ) ) {
				$essl_exclude_match_2 = ":not([href='" . get_option( 'essl_exclude_match_2' ) . "'])";
			}
			if ( get_option( 'essl_exclude_match_3' ) ) {
				$essl_exclude_match_3 = ":not([href='" . get_option( 'essl_exclude_match_3' ) . "'])";
			}
			if ( get_option( 'essl_exclude_match_4' ) ) {
				$essl_exclude_match_4 = ":not([href='" . get_option( 'essl_exclude_match_4' ) . "'])";
			}
			if ( get_option( 'essl_exclude_match_5' ) ) {
				$essl_exclude_match_5 = ":not([href='" . get_option( 'essl_exclude_match_5' ) . "'])";
			}
			$essl_exclude_begin = $essl_exclude_begin_1 . $essl_exclude_begin_2 . $essl_exclude_begin_3 . $essl_exclude_begin_4 . $essl_exclude_begin_5;
			$essl_exclude_match = $essl_exclude_match_1 . $essl_exclude_match_2 . $essl_exclude_match_3 . $essl_exclude_match_4 . $essl_exclude_match_5;

			if ( get_option( 'enable_essl_aggressive' ) == '1' ) { ?>
				<script type="text/javascript">
					jQuery.noConflict();
					(
						function ( $ ) {

							var jump = function ( e ) {
								if ( e ) {
									var target = $( this ).attr( "href" );
								} else {
									var target = location.hash;
								}

								var scrollToPosition = $( target ).offset().top - <?php if ( get_option( 'essl_offset' ) != '' ) {
									echo esc_attr( get_option( 'essl_offset' ) );
								} else {
									echo '20';
								} ?>;

								$( 'html,body' ).animate( {scrollTop: scrollToPosition},<?php if ( get_option( 'essl_speed' ) != '' ) {
									echo esc_attr( get_option( 'essl_speed' ) );
								} else {
									echo '900';
								} ?> , '<?php echo esc_attr( get_option( 'essl_easing', 'easeInQuint' ) );?>' );

							}

							$( 'html, body' ).hide()

							$( document ).ready( function () {
								$( "area[href*=\\#],a[href*=\\#]:not([href=\\#]):not([href^='\\#tab']):not([href^='\\#quicktab']):not([href^='\\#pane'])<?php if ( $essl_exclude_begin ) {
									echo $essl_exclude_begin;
								} ?><?php if ( $essl_exclude_match ) {
									echo $essl_exclude_match;
								} ?>" ).bind( "click", jump );

								if ( location.hash ) {
									setTimeout( function () {
										$( 'html, body' ).scrollTop( 0 ).show()
										jump()
									}, 0 );
								} else {
									$( 'html, body' ).show()
								}
							} );

						}
					)( jQuery )
				</script>
			<?php } else { ?>
				<script type="text/javascript">
					jQuery.noConflict();
					(
						function ( $ ) {
							$( function () {
								$( "area[href*=\\#],a[href*=\\#]:not([href=\\#]):not([href^='\\#tab']):not([href^='\\#quicktab']):not([href^='\\#pane'])<?php if ( $essl_exclude_begin ) {
									echo $essl_exclude_begin;
								} ?><?php if ( $essl_exclude_match ) {
									echo $essl_exclude_match;
								} ?>" ).click( function () {
									if ( location.pathname.replace( /^\//, '' ) == this.pathname.replace( /^\//, '' ) && location.hostname == this.hostname ) {
										var target = $( this.hash );
										target = target.length ? target : $( '[name=' + this.hash.slice( 1 ) + ']' );
										if ( target.length ) {
											$( 'html,body' ).animate( {
												scrollTop: target.offset().top - <?php if ( get_option( 'essl_offset' ) != '' ) {
													echo esc_attr( get_option( 'essl_offset' ) );
												} else {
													echo '20';
												} ?>
											},<?php if ( get_option( 'essl_speed' ) != '' ) {
												echo esc_attr( get_option( 'essl_speed' ) );
											} else {
												echo '900';
											} ?> , '<?php echo esc_attr( get_option( 'essl_easing', 'easeInQuint' ) );?>' );
											return false;
										}
									}
								} );
							} );
						}
					)( jQuery );
				</script>
			<?php }
		}
	}
endif;

if ( ! function_exists( 'essl_fs' ) ) {
	// Create a helper function for easy SDK access.
	function essl_fs() {
		global $essl_fs;

		if ( ! isset( $essl_fs ) ) {
			// Include Freemius SDK.
			require_once dirname( __FILE__ ) . '/wp-sdk/start.php';

			$essl_fs = fs_dynamic_init( array(
				'id'             => '7910',
				'slug'           => 'Easy_Smooth_Scroll_Links',
				'type'           => 'plugin',
				'public_key'     => 'pk_70623ba9c7224731c36b70fca4b4d',
				'is_premium'     => false,
				'has_addons'     => false,
				'has_paid_plans' => false,
				'menu'           => array(
					'slug'    => 'essl-plugin-options_options',
					'support' => false,
					'parent'  => array(
						'slug' => 'options-general.php',
					),
				),
			) );
		}

		return $essl_fs;
	}

	// Init Freemius.
	essl_fs();
	// Signal that SDK was initiated.
	do_action( 'essl_fs_loaded' );
}