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<?php
/*
Plugin Name: Modern Footnotes
Plugin URI: http://prismtechstudios.com/modern-footnotes
Text Domain: modern-footnotes
Description: Add inline footnotes to your post via the footnote icon on the toolbar for editing posts and pages. Or, use the [mfn] or [modern_footnote] shortcodes [mfn]like this[/mfn].
Version: 1.4.19
Author: Prism Tech Studios
Author URI: http://prismtechstudios.com/
License: GPL2
License URI: https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html
*/
//don't let users call this file directly
defined( 'ABSPATH' ) or die( 'No script kiddies please!' );
$modern_footnotes_version = '1.4.19';
$modern_footnotes_options = get_option('modern_footnotes_settings');
// set default options, if they have not been set
if ($modern_footnotes_options === FALSE) {
$modern_footnotes_options = [];
}
if (get_option('modern_footnotes_include_footnote_list_at_end_of_rss_content_default_value_has_been_set') === FALSE &&
!isset($modern_footnotes_options['modern_footnotes_include_footnote_list_at_end_of_rss_content'])) {
$modern_footnotes_options['modern_footnotes_include_footnote_list_at_end_of_rss_content'] = 1;
update_option('modern_footnotes_include_footnote_list_at_end_of_rss_content_default_value_has_been_set', 1); // this variable is so the default value doesn't get reset if modern_footnotes_include_footnote_list_at_end_of_rss_content is removed from optiosn (which happens when the settings checkbox is unchecked)
update_option('modern_footnotes_settings', $modern_footnotes_options);
}
if (get_option('modern_footnotes_use_expandable_footnotes_on_desktop_instead_of_tooltips_has_been_migrated') === FALSE &&
!isset($modern_footnotes_options['desktop_footnote_behavior']) &&
isset($modern_footnotes_options['use_expandable_footnotes_on_desktop_instead_of_tooltips']) &&
$modern_footnotes_options['use_expandable_footnotes_on_desktop_instead_of_tooltips']) {
$modern_footnotes_options['desktop_footnote_behavior'] = 'expandable';
update_option('modern_footnotes_use_expandable_footnotes_on_desktop_instead_of_tooltips_has_been_migrated', 1); // this variable is so the default value doesn't get re-migrated
update_option('modern_footnotes_settings', $modern_footnotes_options);
}
//will contain an entry for each unique post displayed on the page. Each post will have three values:
// modern_footnotes_post_number -- a number identifying the post that can be written out to the HTML
// used_reference_numbers -- an array of the reference numbers for the footnotes that have been used
// footnotes -- an array containing each individual footnote, keyed by the reference number
// footnotes_previously_used -- an array, that if it appears, is an array that could contain multiple previous values of the `footnotes` property. The `footnotes` property is reset when `referencereset` is passed into the mfn shortcode, and previously used footnotes are all stored in this array
$modern_footnotes_all_posts_data = array();
$current_modern_footnotes_post_number = 0;
function modern_footnotes_execute_mfn_list_shortcode($content) {
$content = str_replace('[mfn_list_execute_after_content_processed]', modern_footnotes_list_footnotes(), $content);
return $content;
}
function modern_footnotes_list_footnotes($show_only_when_printing = FALSE, $hide_when_printing = FALSE, $for_rss_feed = FALSE) {
global $modern_footnotes_all_posts_data, $modern_footnotes_options;
$scope_id = modern_footnotes_get_post_scope_id();
if (empty($modern_footnotes_all_posts_data[$scope_id])) {
return '';
}
$footnotes_used = array();
if (isset($modern_footnotes_all_posts_data[$scope_id]['footnotes_previously_used'])) {
foreach ($modern_footnotes_all_posts_data[$scope_id]['footnotes_previously_used'] as $f) {
$footnotes_used[] = $f;
}
}
$footnotes_used[] = $modern_footnotes_all_posts_data[$scope_id]['footnotes'];
$content = '';
if (isset($modern_footnotes_options['modern_footnotes_heading_for_footnote_list']) && strlen($modern_footnotes_options['modern_footnotes_heading_for_footnote_list']) > 0) {
$tag_name = isset($modern_footnotes_options['modern_footnotes_heading_tag_name_for_footnote_list']) ? $modern_footnotes_options['modern_footnotes_heading_tag_name_for_footnote_list'] : 'h3';
$content .= '<' . $tag_name . ' class="modern-footnotes-list-heading ' .
($show_only_when_printing ? 'modern-footnotes-list-heading--show-only-for-print' : '') .
($hide_when_printing ? 'modern-footnotes-list-heading--hide-for-print' : '')
. '">' . $modern_footnotes_options['modern_footnotes_heading_for_footnote_list'] . '</' . $tag_name . '>';
}
if ($for_rss_feed) {
foreach ($footnotes_used as $footnote_list) {
foreach($footnote_list as $display_number => $footnote_content) {
$content .= '<div>';
$content .= $display_number;
$content .= ' ';
$content .= $footnote_content;
$content .= '</div>';
}
}
}
else {
$content .= '<ul class="modern-footnotes-list ' .
($show_only_when_printing ? 'modern-footnotes-list--show-only-for-print' : '') .
($hide_when_printing ? 'modern-footnotes-list--hide-for-print' : '')
. '">';
foreach ($footnotes_used as $footnote_list) {
foreach($footnote_list as $display_number => $footnote_content) {
$content .= '<li>';
$content .= '<span>' . $display_number . '</span>';
$content .= '<div>';
$content .= $footnote_content;
$content .= '</div>';
$content .= '</li>';
}
}
$content .= '</ul>';
}
return $content;
}
function modern_footnotes_list_func($atts=[], $content = "") {
modern_footnotes_enqueue_scripts_styles_if_not_already_enqueued();
return '[mfn_list_execute_after_content_processed]';
}
function modern_footnotes_rss_func($atts, $content = "") {
if (!is_array($atts)) {
$atts = [];
}
$atts['for_rss_feed'] = TRUE;
return modern_footnotes_func($atts,$content);
}
function modern_footnotes_func($atts, $content = "") {
global $modern_footnotes_all_posts_data, $modern_footnotes_options;
modern_footnotes_enqueue_scripts_styles_if_not_already_enqueued();
$additional_classes = '';
if (
(isset($modern_footnotes_options['desktop_footnote_behavior']) && $modern_footnotes_options['desktop_footnote_behavior'] == 'expandable')
/* legacy option use_expandable_footnotes_on_desktop_instead_of_tooltips - should not be set in modern footnotes 1.4.5+ */
|| (
!isset($modern_footnotes_options['desktop_footnote_behavior']) && isset($modern_footnotes_options['use_expandable_footnotes_on_desktop_instead_of_tooltips']) && $modern_footnotes_options['use_expandable_footnotes_on_desktop_instead_of_tooltips']
)
) {
$additional_classes .= 'modern-footnotes-footnote--expands-on-desktop ';
} else if (isset($modern_footnotes_options['desktop_footnote_behavior']) && $modern_footnotes_options['desktop_footnote_behavior'] == 'tooltip_hover') {
$additional_classes .= 'modern-footnotes-footnote--hover-on-desktop ';
}
// If additional space-seperated classes are provided to an individual footnote using [mfn class="some-class"], they are added to the footnote
if (isset($atts['class'])) {
$additional_classes .= esc_attr($atts['class']).' ';
}
// $scope_id will have a unique value for each post on the page -- this helps handle when a post is
// nested inside another post, as can happen with the Display Posts plugin
$scope_id = modern_footnotes_get_post_scope_id();
$additional_attributes = '';
if (isset($atts['referencereset']) && $atts['referencereset'] == 'true') {
if (isset($modern_footnotes_all_posts_data[$scope_id])) {
$modern_footnotes_all_posts_data[$scope_id]['used_reference_numbers'] = array();
$additional_attributes .= ' data-mfn-reset';
// store the content of previously used footnotes, in case we are reusing a reference number and we
// are also using a list of footnotes.
if (!isset($modern_footnotes_all_posts_data[$scope_id]['footnotes_previously_used'])) {
$modern_footnotes_all_posts_data[$scope_id]['footnotes_previously_used'] = array($modern_footnotes_all_posts_data[$scope_id]['footnotes']);
} else {
$modern_footnotes_all_posts_data[$scope_id]['footnotes_previously_used'][] = $modern_footnotes_all_posts_data[$scope_id]['footnotes'];
}
$modern_footnotes_all_posts_data[$scope_id]['footnotes'] = array();
}
}
if (isset($atts['referencenumber'])) {
$display_number = $atts['referencenumber'];
$additional_attributes = 'refnum="' . esc_attr($display_number) . '"';
} else if (!isset($modern_footnotes_all_posts_data[$scope_id]) || count($modern_footnotes_all_posts_data[$scope_id]['used_reference_numbers']) == 0) {
$display_number = 1;
} else {
$display_number = max($modern_footnotes_all_posts_data[$scope_id]['used_reference_numbers']) + 1;
}
$content = do_shortcode($content); // render out any shortcodes within the contents
$content = str_replace('<p>','', $content);
$content = str_replace('</p>','<br /><br />', $content);
if (isset($modern_footnotes_options['use_title_tags_for_footnote_links']) && $modern_footnotes_options['use_title_tags_for_footnote_links']) {
$additional_attributes .= ' title="' . str_replace('"','"', strip_tags($content)) . '" ';
}
if (!isset($modern_footnotes_all_posts_data[$scope_id])) {
$modern_footnotes_all_posts_data[$scope_id] = array(
'modern_footnotes_post_number' => $GLOBALS['current_modern_footnotes_post_number'],
'used_reference_numbers' => array($display_number),
'footnotes' => array(
$display_number => $content
)
);
$GLOBALS['current_modern_footnotes_post_number']++;
} else {
if (is_numeric($display_number)) {
$modern_footnotes_all_posts_data[$scope_id]['used_reference_numbers'][] = $display_number;
}
$modern_footnotes_all_posts_data[$scope_id]['footnotes'][$display_number] = $content;
}
//create a unique ID to use in HTML
$content_id = "mfn-content-" . $scope_id . '-' . preg_replace('/[^a-zA-Z0-9-_]/i', '', esc_attr($display_number));
if (isset($atts['for_rss_feed']) && $atts['for_rss_feed']) {
$content = '<sup class="modern-footnotes-footnote ' . $additional_classes . '">' . esc_html($display_number) . '</sup>'; // only display the superscript for RSS feeds
} else {
$content = '<sup class="modern-footnotes-footnote ' . $additional_classes . '" data-mfn="' . str_replace('"',"\\\"", esc_attr($display_number)) . '" data-mfn-post-scope="' . $scope_id . '">' .
'<a href="javascript:void(0)" ' . $additional_attributes . ' role="button" aria-pressed="false" aria-describedby="' . $content_id . '">' . $display_number . '</a>' .
'</sup>' .
'<span id="' . $content_id . '" role="tooltip" class="modern-footnotes-footnote__note" tabindex="0" data-mfn="' . str_replace('"',"\\\"", $display_number) . '">' . $content . '</span>'; //use a block element, not an inline element: otherwise, footnotes with line breaks won't display correctly
}
return $content;
}
//if the options are set to do so, list the footnotes at the bottom of the page
function modern_footnotes_display_after_content($content) {
global $modern_footnotes_options;
$show_only_when_printing = FALSE;
$hide_when_printing = FALSE;
if (
(!isset($GLOBALS['modern_footnotes_displaying_rss_feed']) || !$GLOBALS['modern_footnotes_displaying_rss_feed']) &&
(
(isset($modern_footnotes_options['display_footnotes_at_bottom_of_posts']) && $modern_footnotes_options['display_footnotes_at_bottom_of_posts']) ||
(isset($modern_footnotes_options['display_footnotes_at_bottom_of_posts_when_printing']) && $modern_footnotes_options['display_footnotes_at_bottom_of_posts_when_printing'])
)
) {
$options = array();
if (isset($modern_footnotes_options['display_footnotes_at_bottom_of_posts_when_printing']) && $modern_footnotes_options['display_footnotes_at_bottom_of_posts_when_printing']) {
if (!isset($modern_footnotes_options['display_footnotes_at_bottom_of_posts']) || !$modern_footnotes_options['display_footnotes_at_bottom_of_posts']) {
$show_only_when_printing = TRUE;
}
} else {
$hide_when_printing = TRUE;
}
$content .= modern_footnotes_list_footnotes($show_only_when_printing, $hide_when_printing);
}
return $content;
}
$modern_footnotes_shortcodes = array('modern_footnote','mfn');
if (isset($modern_footnotes_options['modern_footnotes_custom_shortcode']) && !empty($modern_footnotes_options['modern_footnotes_custom_shortcode'])) {
$modern_footnotes_shortcodes[] = $modern_footnotes_options['modern_footnotes_custom_shortcode'];
}
foreach ($modern_footnotes_shortcodes as $modern_footnote_shortcode) {
add_shortcode($modern_footnote_shortcode, 'modern_footnotes_func');
}
add_shortcode('mfn_list', 'modern_footnotes_list_func');
add_filter('the_content', 'modern_footnotes_reset_count', 10); // run before shortcodes are processed
add_filter('the_content', 'modern_footnotes_display_after_content', 11);
add_filter('the_content', 'modern_footnotes_execute_mfn_list_shortcode', 12);
//reset the footnote counter for every new post
function modern_footnotes_reset_count($content) {
// if we are loading a scope that has previously been loaded, this is our second time loading the post. Reset the footnotes for the post.
$scope = modern_footnotes_get_post_scope_id();
if (isset($GLOBALS['modern_footnotes_all_posts_data'][$scope])) {
unset($GLOBALS['modern_footnotes_all_posts_data'][$scope]);
}
return $content;
}
add_action('the_post', 'modern_footnotes_check_post_query',10,2);
// save the unique queries on the page, so that if a post is contained within another post, we can properly scope the
// footnote numbering to that particular post
function modern_footnotes_check_post_query($scoped_post, $scoped_query = null) {
global $modern_footnotes_active_query;
if (isset($scoped_query)) {
$modern_footnotes_active_query = $scoped_query;
}
}
// return an ID that can be used to identify the unique post that we are in -- used for listing multiple posts on the
// same page, including when posts are nested with plugins like DisplayPosts
function modern_footnotes_get_post_scope_id() {
if (isset($GLOBALS['post'])) {
$global_post = $GLOBALS['post'];
if (is_object($global_post)) {
if (property_exists($global_post, 'ID')) {
$global_post_id = $global_post->ID;
} else {
// some plugins, like relevanssi, modify the 'post' object to something other than a WP_Post instance (https://wordpress.org/support/topic/v1-4-18-breaks-search/)
$global_post_id = spl_object_hash($global_post);
}
} else {
$global_post_id = $global_post;
}
if (isset($GLOBALS['modern_footnotes_active_query'])) {
return spl_object_hash($GLOBALS['modern_footnotes_active_query']) . '_' . $global_post_id;
} else {
return 'post_' . $global_post_id;
}
} else {
return 'na';
}
}
// replace <mfn> HTML tags added by Gutenberg/block editor to [mfn] shortcodes
// When multiple formats are applied, Gutenberg can have multiple <mfn> tags for one footnote, so we'll have to iterate through the text and group sibling tags together (see https://github.com/seankwilliams/modern-footnotes/issues/14)
function modern_footnotes_replace_mfn_tag_with_shortcode( $content ) {
$content = str_replace('</mfn>','<mfn>',$content); //using [mfn] instead of [/mfn] is intentional here
$content_parts = explode('<mfn>', $content);
$content_data = array();
//$tagsFromPreviousSegment = array();
$inFootnote = FALSE;
foreach ($content_parts as $c) {
$content_data[] = array(
"content" => $c,
"inFootnote" => $inFootnote
);
$inFootnote = !$inFootnote;
}
$wasInFootnote = FALSE;
for ($i = 0; $i < count($content_data); $i++) {
//if this is only opening tags or only closing tags, place it in the footnote
$replacedString = preg_replace("/<\/?\\w+\\s?\\w?.*?>/ms", "", $content_data[$i]['content']);
if (strlen($replacedString) === 0 && !$content_data[$i]['inFootnote'] && $wasInFootnote) { // check $wasInFootnote to fix https://github.com/seankwilliams/modern-footnotes/issues/18
$content_data[$i]['inFootnote'] = TRUE;
} else {
$wasInFootnote = $content_data[$i]['inFootnote'];
}
}
$final_content = '';
$inFootnote = FALSE;
foreach ($content_data as $cd) {
if ($cd['inFootnote'] && !$inFootnote) {
$inFootnote = TRUE;
$final_content .= '[mfn]';
} else if ($inFootnote && !$cd['inFootnote']) {
$inFootnote = FALSE;
$final_content .= '[/mfn]';
}
$final_content .= $cd['content'];
}
if ($inFootnote) {
$final_content .= '[/mfn]';
}
return $final_content;
}
add_filter( 'the_content', 'modern_footnotes_replace_mfn_tag_with_shortcode' );
// remove <mfn> HTML tags added by Gutenberg/block editor
function modern_footnotes_strip_rendered_mfn_tag( $content ) {
// we will remove all rendered text from the <mfn> tags
global $modern_footnotes_all_posts_data;
$scope_id = modern_footnotes_get_post_scope_id();
if (empty($modern_footnotes_all_posts_data[$scope_id])) {
return $content;
}
$footnotes_used = array();
if (isset($modern_footnotes_all_posts_data[$scope_id]['footnotes_previously_used'])) {
foreach ($modern_footnotes_all_posts_data[$scope_id]['footnotes_previously_used'] as $f) {
$footnotes_used[] = $f;
}
}
$footnotes_used[] = $modern_footnotes_all_posts_data[$scope_id]['footnotes'];
foreach ($footnotes_used as $footnote_list) {
foreach($footnote_list as $display_number => $footnote_content) {
if (!empty($footnote_content)) { //ensure footnote_content is not empty: otherwise, we may be replacing just a number, which is far too common
$content = str_replace($display_number . wp_strip_all_tags($footnote_content), '', $content);
}
}
}
return $content;
}
add_filter( 'wp_trim_words', 'modern_footnotes_strip_rendered_mfn_tag'); // use this filter so that <mfn> HTML tags added through gutenberg are removed in wp_trim_excerpt -- in wp_trim_excerpt, strip_shortcodes runs AFTER the_content filters do
function modern_footnotes_register_scripts_styles() {
global $modern_footnotes_options, $modern_footnotes_shortcodes, $modern_footnotes_version, $post;
wp_register_style('modern_footnotes', plugin_dir_url(__FILE__) . 'styles.min.css', array(), $modern_footnotes_version);
wp_register_script('modern_footnotes', plugin_dir_url(__FILE__) . 'modern-footnotes.min.js', array('jquery'), $modern_footnotes_version, TRUE);
if (!is_admin() && isset($modern_footnotes_options['modern_footnotes_custom_css']) && !empty($modern_footnotes_options['modern_footnotes_custom_css'])) {
wp_add_inline_style( 'modern_footnotes', $modern_footnotes_options['modern_footnotes_custom_css'] );
}
// if we are in a post, and the post uses the shortcode, enqueue the style + script
// this is not foolproof since the shortcode could be used in other ways (like post metadata), so we
// will have to check when rendering the shortcodes to ensure that the scripts/styles are enqueued
if (is_a( $post, 'WP_Post' )) {
$has_shortcode = FALSE;
if (isset($modern_footnotes_shortcodes)) { // attempt to resolve https://wordpress.org/support/topic/error-causes-php-process-hang/ - I am not really clear how this variable could be null here, though.
foreach ($modern_footnotes_shortcodes as $modern_footnote_shortcode) {
if (has_shortcode($post->post_content, $modern_footnote_shortcode)) {
$has_shortcode = TRUE;
}
}
}
if (has_shortcode($post->post_content, 'mfn_list')) {
$has_shortcode = TRUE;
}
if ($has_shortcode) {
wp_enqueue_style('modern_footnotes');
wp_enqueue_script('modern_footnotes');
}
}
}
add_action('wp_enqueue_scripts', 'modern_footnotes_register_scripts_styles');
function modern_footnotes_enqueue_scripts_styles_if_not_already_enqueued() {
if (!wp_style_is('modern_footnotes')) {
wp_enqueue_style('modern_footnotes');
}
if (!wp_script_is('modern_footnotes')) {
wp_enqueue_script('modern_footnotes');
}
}
//
//modify the admin
//
//create a settings page
function modern_footnotes_menu() {
add_options_page( __('Modern Footnotes Settings', 'modern-footnotes'),
__('Modern Footnotes','modern-footnotes'),
'manage_options', __FILE__, 'modern_footnotes_options' );
}
function modern_footnotes_options() {
if ( !current_user_can( 'manage_options' ) ) {
wp_die( __( 'You do not have sufficient permissions to access this page.' ) );
}
echo '<div class="wrap">';
echo '<h1>' . esc_html__('Modern Footnotes Settings','modern-footnotes') . '</h1>';
echo '<form method="post" action="options.php">';
settings_fields('modern_footnotes_settings');
do_settings_sections(__FILE__);
submit_button();
echo '</form>';
echo '</div>';
}
function modern_footnotes_register_settings() { // whitelist options
register_setting('modern_footnotes_settings', 'modern_footnotes_settings',
array(
'type' => 'boolean',
'default' => FALSE,
'sanitize_callback' => 'modern_footnotes_sanitize_callback'
));
add_settings_section(
'modern_footnotes_option_group_section',
__('Modern Footnotes Settings', 'modern-footnotes'),
function() { /* do nothing, no HTML needed for section heading */ },
__FILE__
);
add_settings_field(
'modern_footnotes_desktop_footnote_behavior',
__('Desktop footnote behavior', 'modern-footnotes'),
'modern_footnotes_desktop_footnote_behavior_dropdown_callback',
__FILE__,
'modern_footnotes_option_group_section'
);
add_settings_field(
'use_title_tags_for_footnote_links',
__('Show browser tooltip on hover', 'modern-footnotes'),
'modern_footnotes_checkbox_element_callback',
__FILE__,
'modern_footnotes_option_group_section',
array(
'property_name' => 'use_title_tags_for_footnote_links',
'property_label' => 'Make footnote content appear in web browser\'s native tooltip when hovering over footnote number'
)
);
add_settings_field(
'display_footnotes_at_bottom_of_posts',
__('Display footnote list at bottom of posts', 'modern-footnotes'),
'modern_footnotes_checkbox_element_callback',
__FILE__,
'modern_footnotes_option_group_section',
array(
'property_name' => 'display_footnotes_at_bottom_of_posts',
'property_label' => 'Display footnote list at bottom of posts'
)
);
add_settings_field(
'display_footnotes_at_bottom_of_posts_when_printing',
__('When printing, list footnotes at the bottom of posts', 'modern-footnotes'),
'modern_footnotes_checkbox_element_callback',
__FILE__,
'modern_footnotes_option_group_section',
array(
'property_name' => 'display_footnotes_at_bottom_of_posts_when_printing',
'property_label' => 'When printing, list footnotes at the bottom of posts'
)
);
add_settings_field(
'modern_footnotes_include_footnote_list_at_end_of_rss_content',
__('For post content in RSS feeds, list footnotes at the bottom of posts', 'modern-footnotes'),
'modern_footnotes_checkbox_element_callback',
__FILE__,
'modern_footnotes_option_group_section',
array(
'property_name' => 'modern_footnotes_include_footnote_list_at_end_of_rss_content',
'property_label' => 'For post content in RSS feeds, list footnotes at the bottom of posts'
)
);
add_settings_field(
'modern_footnotes_heading_for_footnote_list',
__('Heading for footnote list', 'modern-footnotes'),
'modern_footnotes_textbox_element_callback',
__FILE__,
'modern_footnotes_option_group_section',
array(
'property_name' => 'modern_footnotes_heading_for_footnote_list',
'property_label' => 'If provided, this text will be displayed above footnote lists'
)
);
add_settings_field(
'modern_footnotes_heading_tag_name_for_footnote_list',
__('Heading tag name for footnote list', 'modern-footnotes'),
'modern_footnotes_tag_name_for_footnote_list_dropdown_callback',
__FILE__,
'modern_footnotes_option_group_section'
);
add_settings_field(
'modern_footnotes_custom_css',
__('Modern Footnotes Custom CSS', 'modern-footnotes'),
'modern_footnotes_custom_css_element_callback',
__FILE__,
'modern_footnotes_option_group_section'
);
add_settings_field(
'modern_footnotes_custom_shortcode',
__('Modern Footnotes Custom Shortcode', 'modern-footnotes'),
'modern_footnotes_custom_shortcode_element_callback',
__FILE__,
'modern_footnotes_option_group_section'
);
}
function modern_footnotes_sanitize_callback($plugin_options) {
global $modern_footnotes_options;
if (isset($plugin_options['modern_footnotes_custom_css']) && !empty($plugin_options['modern_footnotes_custom_css'])) {
//strip style HTML tags from the custom CSS property
$plugin_options['modern_footnotes_custom_css'] = preg_replace('/<\/?style.*?>/i', '', $plugin_options['modern_footnotes_custom_css']);
}
if (isset($plugin_options['modern_footnotes_custom_shortcode']) && !empty($plugin_options['modern_footnotes_custom_shortcode'])) {
//remove invalid characters from shortcode
$plugin_options['modern_footnotes_custom_shortcode'] = preg_replace('/[^a-zA-Z0-9-_]/i', '', $plugin_options['modern_footnotes_custom_shortcode']);
if ((!isset($modern_footnotes_options['modern_footnotes_custom_shortcode']) || $modern_footnotes_options['modern_footnotes_custom_shortcode'] != $plugin_options['modern_footnotes_custom_shortcode']) &&
shortcode_exists($plugin_options['modern_footnotes_custom_shortcode'])) {
add_settings_error( 'modern_footnotes_custom_shortcode', 'shortcode-in-use', 'The shortcode "' . $plugin_options['modern_footnotes_custom_shortcode'] . '" is already in use, please enter a different one' );
$plugin_options['modern_footnotes_custom_shortcode'] = '';
}
}
return $plugin_options;
}
function modern_footnotes_checkbox_element_callback($args) {
global $modern_footnotes_options;
$property_name = $args['property_name'];
$property_label = $args['property_label'];
$html = '<input type="checkbox" id="%1$s" name="modern_footnotes_settings[%1$s]" value="1"' . checked( 1, isset($modern_footnotes_options[$property_name]) && $modern_footnotes_options[$property_name], FALSE ) . '/>';
$html .= '<label for="%1$s">' .
esc_html__($property_label, 'modern-footnotes') .
'</label>';
$html = sprintf($html, $property_name);
echo $html;
}
function modern_footnotes_textbox_element_callback($args) {
global $modern_footnotes_options;
$property_name = $args['property_name'];
$property_label = $args['property_label'];
$html = '<input type="text" id="%1$s" name="modern_footnotes_settings[%1$s]" value="%2$s" />';
$html .= ' <label for="%1$s">' .
esc_html__($property_label, 'modern-footnotes') .
'</label>';
$html = sprintf($html, $property_name, isset($modern_footnotes_options[$property_name]) ? esc_attr($modern_footnotes_options[$property_name]) : '');
echo $html;
}
function modern_footnotes_desktop_footnote_behavior_dropdown_callback() {
global $modern_footnotes_options;
$selected_value = isset($modern_footnotes_options['desktop_footnote_behavior']) ? $modern_footnotes_options['desktop_footnote_behavior'] : '';
$options = array(
'tooltip_click' => __('Tooltip footnotes that open on click', 'modern-footnotes'),
'tooltip_hover' => __('Tooltip footnotes that open on hover', 'modern-footnotes'),
'expandable' => __('Expandable footnotes', 'modern-footnotes'),
);
$html = '<select id="modern_footnotes_desktop_footnote_behavior" name="modern_footnotes_settings[desktop_footnote_behavior]"> aria-label="%1$s"';
foreach ($options as $key => $value) {
$option_html = '<option value="%s" %s>%s</option>';
$html .= sprintf($option_html, esc_attr($key), $selected_value == $key ? 'selected' : '', esc_html($value));
}
$html .= '</select>';
$html = sprintf($html, __('Desktop footnote behavior', 'modern-footnotes'));
echo $html;
}
function modern_footnotes_tag_name_for_footnote_list_dropdown_callback() {
global $modern_footnotes_options;
$selected_value = isset($modern_footnotes_options['modern_footnotes_heading_tag_name_for_footnote_list']) ? $modern_footnotes_options['modern_footnotes_heading_tag_name_for_footnote_list'] : 'h3';
$options = array(
'h2' => __('Heading 2', 'access2'),
'h3' => __('Heading 3', 'access3'),
'h4' => __('Heading 4', 'access4'),
'h5' => __('Heading 5', 'access5'),
'h6' => __('Heading 6', 'access6')
);
$html = '<select id="modern_footnotes_heading_tag_name_for_footnote_list" name="modern_footnotes_settings[modern_footnotes_heading_tag_name_for_footnote_list]"> aria-label="%1$s"';
foreach ($options as $key => $value) {
$option_html = '<option value="%s" %s>%s</option>';
$html .= sprintf($option_html, esc_attr($key), $selected_value == $key ? 'selected' : '', esc_html($value));
}
$html .= '</select>';
$html = sprintf($html, __('Heading tag name for footnote list', 'modern-footnotes'));
echo $html;
}
function modern_footnotes_custom_css_element_callback() {
global $modern_footnotes_options;
$html = '<textarea id="modern_footnotes_custom_css" name="modern_footnotes_settings[modern_footnotes_custom_css]" style="max-width:100%;width:400px;height:200px">' . (isset($modern_footnotes_options['modern_footnotes_custom_css']) ? esc_textarea($modern_footnotes_options['modern_footnotes_custom_css']) : '') . '</textarea>';
$html .= '<label for="modern_footnotes_custom_css">' .
esc_html__('Enter any custom CSS for the plugin, without any <style> tags.', 'modern-footnotes') .
'</label>';
echo $html;
}
function modern_footnotes_custom_shortcode_element_callback() {
global $modern_footnotes_options;
$html = '<input type="text" id="modern_footnotes_custom_shortcode" name="modern_footnotes_settings[modern_footnotes_custom_shortcode]" value="' . (isset($modern_footnotes_options['modern_footnotes_custom_shortcode']) ? $modern_footnotes_options['modern_footnotes_custom_shortcode'] : '') . '" />';
$html .= '<label for="modern_footnotes_custom_shortcode">' .
esc_html__('Custom shortcode if you\'d like to use something other than [mfn] or [modern_footnote]. Enter the shortcode without the brackets.', 'modern-footnotes') .
'</label>';
echo $html;
}
function modern_footnotes_return_blank_for_rss_func($atts, $content = "") {
return "";
}
// remove shortcode from RSS feed
function modern_footnotes_remove_from_rss_content_feed($content) {
return modern_footnotes_remove_from_rss_feed($content, TRUE);
}
function modern_footnotes_remove_from_rss_feed($content, $is_content_section = FALSE){
foreach ($GLOBALS['modern_footnotes_shortcodes'] as $modern_footnote_shortcode) {
remove_shortcode($modern_footnote_shortcode);
if ($GLOBALS['modern_footnotes_options']['modern_footnotes_include_footnote_list_at_end_of_rss_content']) {
add_shortcode($modern_footnote_shortcode, 'modern_footnotes_rss_func');
} else {
add_shortcode($modern_footnote_shortcode, 'modern_footnotes_return_blank_for_rss_func');
}
}
// do not let the [mfn_list] shortcode execute in the RSS feed
remove_shortcode('mfn_list');
add_shortcode('mfn_list', 'modern_footnotes_return_blank_for_rss_func');
// add a [mfn_rss_list] shortcode to the end of the post content
if ($GLOBALS['modern_footnotes_options']['modern_footnotes_include_footnote_list_at_end_of_rss_content'] && $is_content_section) {
$content .= modern_footnotes_list_footnotes(FALSE,FALSE,TRUE);
}
return $content;
}
add_filter('the_excerpt_rss', 'modern_footnotes_remove_from_rss_feed');
add_filter('the_content_feed', 'modern_footnotes_remove_from_rss_content_feed');
// set variable to let us know we are in an rss feed
function modern_footnotes_in_rss() {
$GLOBALS['modern_footnotes_displaying_rss_feed'] = TRUE;
}
add_action('rss_head', 'modern_footnotes_in_rss'); // for RSS 1
add_action('rss_tag_pre', 'modern_footnotes_in_rss'); //for all other feed types
if (is_admin()) { // admin actions
add_action( 'admin_menu', 'modern_footnotes_menu' );
add_action( 'admin_init', 'modern_footnotes_register_settings' );
}
//setup button on the WordPress editor
//
// Pre-Gutenberg editor
//
function modern_footnotes_add_container_button() {
if ( ! current_user_can('edit_posts') && ! current_user_can('edit_pages') )
return;
if ( get_user_option('rich_editing') == 'true') {
add_filter('mce_external_plugins', 'modern_footnotes_add_container_plugin');
add_filter('mce_buttons', 'modern_footnotes_register_container_button');
}
}
if (is_admin()) {
add_filter('init', 'modern_footnotes_add_container_button');
function modern_footnotes_enqueue_admin_scripts() {
global $modern_footnotes_version;
wp_enqueue_style('modern_footnotes', plugin_dir_url(__FILE__) . 'styles.mce-button.min.css', array(), $modern_footnotes_version);
}
add_action('admin_enqueue_scripts', 'modern_footnotes_enqueue_admin_scripts');
}
function modern_footnotes_register_container_button($buttons) {
array_push($buttons, "modern_footnotes");
return $buttons;
}
function modern_footnotes_add_container_plugin($plugin_array) {
$plugin_array['modern_footnotes'] = plugin_dir_url(__FILE__) . 'modern-footnotes.mce-button.min.js';
return $plugin_array;
}
//
// End Pre-Gutenberg editor
//
//
// Gutenberg / Block Editor
//
function modern_footnotes_block_editor_button() {
$currentScreen = get_current_screen();
if ($currentScreen->id === "widgets") {
return;
}
global $modern_footnotes_version;
wp_enqueue_script( 'modern_footnotes_block_editor_js',
plugin_dir_url(__FILE__) . 'modern-footnotes.block-editor.min.js',
array( 'wp-rich-text', 'wp-element', 'wp-block-editor', 'wp-i18n' ),
$modern_footnotes_version
);
wp_set_script_translations('modern_footnotes_block_editor_js','modern-footnotes');
wp_enqueue_style('modern_footnotes_block_editor_css', plugin_dir_url(__FILE__) . 'styles.block-editor-button.min.css', array(), $modern_footnotes_version);
}
add_action( 'enqueue_block_editor_assets', 'modern_footnotes_block_editor_button' );
//
// End Gutenberg / Block Editor
//