*
* @since 2.0.9 DISABLED the_post HOOK 2020-11-08T1839+0100
*
* @since 2.1.0 promoted the 'Continue reading' button from localization to customization 2020-11-08T2146+0100
* @since 2.1.1 combining identical footnotes: fixed dead links, thanks to @happyches 2020-11-14T2233+0100
* @see
* @since 2.1.1 fix start pages by option to hide ref container, thanks to @dragon013
* @see
* @since 2.1.1 options fixing ref container layout and referrer vertical alignment 2020-11-16T2024+0100
* @since 2.1.1 priority level option fixing ref container relative position, thanks to june01, @spaceling, @imeson 2020-11-17T0254+0100
* @see
* @since 2.1.2 priority level settings for all other hooks, thanks to @nikelaos 2020-11-19T1849+0100
* @see
* @since 2.1.4 fix line wrapping of URLs based on pattern, not link element 2020-11-25T0837+0100
* @since 2.1.4 fix issues with link elements by making them optional 2020-11-26T1051+0100
* @since 2.1.4 support appending arrow when combining identicals is on 2020-11-26T1633+0100
* @since 2.1.4 disable or select backlink separator and terminator 2020-11-28T1048+0100
* @since 2.1.4 optional line breaks to stack enumerated backlinks 2020-11-28T1049+0100
* @since 2.1.4 ref container column width and tooltip font size settings 2020-12-03T0954+0100
* @since 2.1.4 scroll offset and duration settings 2020-12-05T0538+0100
* @since 2.1.4 tooltip display duration settings 2020-12-06T1320+0100
* @since 2.1.5 URL wrap: exclude image source too, thanks to @bjrnet21
* @see
* @since 2.1.6 option to disable URL line wrapping 2020-12-09T1606+0100
* @since 2.1.6 add catch-all exclusion to fix URL line wrapping, thanks to @a223123131 2020-12-09T1921+0100
* @see
* @since 2.2.0 support for custom position shortcode for reference container, thanks to @hamshe 2020-12-13T2058+0100
* @see
* @since 2.2.3 custom CSS from new setting in header after legacy 2020-12-15T1128+0100
* @since 2.2.5 connected alternative tooltips to position and timing settings 2020-12-18T1113+0100
* @since 2.2.5 delete unused position shortcode when ref container in widget or footer, thanks to @hamshe 2020-12-18T1437+0100
* @see
* @since 2.2.5 options for label element and label bottom border, thanks to @markhillyer 2020-12-18T1447+0100
* @see
* @since 2.2.6 URL wrap: make the quotation mark optional in the exclusion regex, thanks to @spiralofhope2 2020-12-23T0409+0100
* @see
* @since 2.2.7 revert that change in the exclusion regex, thanks to @rjl20, @spaceling, @friedrichnorth, @bernardzit 2020-12-23T1046+0100
* @see
* @see
* @since 2.2.8 URL wrap: correct lookbehind by duplicating it with and without quotation mark class 2020-12-23T1108+0100
* @since 2.2.9 URL wrap: account for RFC 2396 allowed characters in parameter names 2020-12-24T1956+0100
* @see
* @since 2.2.9 Reference containers, widget_text hook: support for multiple containers in a page, thanks to @justbecuz 2020-12-25T0338+0100
* @see
* @since 2.2.9 URL wrap: exclude URLs also where the equals sign is preceded by an entity or character reference 2020-12-25T1251+0100
* @since 2.2.10 URL wrap: support also file transfer protocol URLs 2020-12-25T2220+0100
* @since 2.2.10 Reference container: add option for table borders to revert 2.0.0/2.0.1 change made on user request, thanks to @noobishh 2020-12-25T2304+0100
* @see
*
* Last modified: 2020-12-25T2352+0100
*/
// If called directly, abort:
defined( 'ABSPATH' ) or die;
/**
* Looks for Footnotes short codes and replaces them. Also displays the Reference Container.
*
* @author Stefan Herndler
* @since 1.5.0
*/
class MCI_Footnotes_Task {
/**
* Contains all footnotes found on current public page.
*
* @author Stefan Herndler
* @since 1.5.0
* @var array
*/
public static $a_arr_Footnotes = array();
/**
* Flag if the display of 'LOVE FOOTNOTES' is allowed on the current public page.
*
* @author Stefan Herndler
* @since 1.5.0
* @var bool
*/
public static $a_bool_AllowLoveMe = true;
/**
* Prefix for the Footnote html element ID.
*
* @author Stefan Herndler
* @since 1.5.8
* @var string
*/
public static $a_str_Prefix = "";
/**
* INFINITE SCROLL / AUTOLOAD, ARCHIVE VIEW
*
* Multiple posts are appended to each other, functions and note IDs must be disambiguated.
*
* Contribution thankfully received from @docteurfitness
* @see
* @since 2.0.5
* @var int
*
* post ID to make everything unique wrt infinite scroll and archive view:
* (will be filled in by the next possible occasion; PHP seems to prohibit doing so here)
*/
public static $l_int_PostId = '';
/**
* Reference container ID
*
* This ID disambiguates multiple reference containers in a page
* as they may occur when the widget_text hook is active and the page
* is built with Elementor and has an accordion or similar toggle sections.
*
* Is incremented each time after a reference container is inserted.
*
* Thanks to @justbecuz
* @see
* @since 2.2.9
* @var int
*/
public static $l_int_ReferenceContainerId = 1;
/**
* Register WordPress Hooks to replace Footnotes in the content of a public page.
*
* @author Stefan Herndler
* @since 1.5.0
*
* Edited for:
* @since 2.0.5 through v2.0.7 changes to priority 2020-11-02T0330+0100..2020-11-06T1344+0100
* @since 2.1.1 add setting for the_content
* @since 2.1.2 add settings for 4 other hooks 2020-11-19T1248+0100
*
* Setting the_content priority to "10" instead of PHP_INT_MAX i.e. 9223372036854775807
* makes the footnotes reference container display beneath the post and above other
* features added by other plugins, e.g. related post lists and social buttons.
* For YARPP to display related posts below the Footnotes reference container,
* priority needs to be at least 1200.
* Requested by users:
* Documentation:
*
* Default remains PHP_INT_MAX.
* PHP_INT_MAX cannot be reset by leaving the number box empty. because browsers
* (WebKit) don’t allow it, so we must resort to -1.
*/
public function registerHooks() {
// get values from settings:
$p_int_TheTitlePriority = intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_EXPERT_LOOKUP_THE_TITLE_PRIORITY_LEVEL));
$p_int_TheContentPriority = intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_EXPERT_LOOKUP_THE_CONTENT_PRIORITY_LEVEL));
$p_int_TheExcerptPriority = intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_EXPERT_LOOKUP_THE_EXCERPT_PRIORITY_LEVEL));
$p_int_WidgetTitlePriority = intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_EXPERT_LOOKUP_WIDGET_TITLE_PRIORITY_LEVEL));
$p_int_WidgetTextPriority = intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_EXPERT_LOOKUP_WIDGET_TEXT_PRIORITY_LEVEL));
// PHP_INT_MAX can be set by -1:
$p_int_TheTitlePriority = ($p_int_TheTitlePriority == -1) ? PHP_INT_MAX : $p_int_TheTitlePriority ;
$p_int_TheContentPriority = ($p_int_TheContentPriority == -1) ? PHP_INT_MAX : $p_int_TheContentPriority ;
$p_int_TheExcerptPriority = ($p_int_TheExcerptPriority == -1) ? PHP_INT_MAX : $p_int_TheExcerptPriority ;
$p_int_WidgetTitlePriority = ($p_int_WidgetTitlePriority == -1) ? PHP_INT_MAX : $p_int_WidgetTitlePriority;
$p_int_WidgetTextPriority = ($p_int_WidgetTextPriority == -1) ? PHP_INT_MAX : $p_int_WidgetTextPriority ;
// append custom css to the header
add_filter('wp_head', array($this, "wp_head"), PHP_INT_MAX);
// append the love and share me slug to the footer
add_filter('wp_footer', array($this, "wp_footer"), PHP_INT_MAX);
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_EXPERT_LOOKUP_THE_TITLE))) {
add_filter('the_title', array($this, "the_title"), $p_int_TheTitlePriority);
}
// custom priority level for reference container relative positioning; default 98:
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_EXPERT_LOOKUP_THE_CONTENT))) {
add_filter('the_content', array($this, "the_content"), $p_int_TheContentPriority);
}
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_EXPERT_LOOKUP_THE_EXCERPT))) {
add_filter('the_excerpt', array($this, "the_excerpt"), $p_int_TheExcerptPriority);
}
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_EXPERT_LOOKUP_WIDGET_TITLE))) {
add_filter('widget_title', array($this, "widget_title"), $p_int_WidgetTitlePriority);
}
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_EXPERT_LOOKUP_WIDGET_TEXT))) {
add_filter('widget_text', array($this, "widget_text"), $p_int_WidgetTextPriority);
}
// REMOVED the_post HOOK 2020-11-08T1839+0100
//
//
// reset stored footnotes when displaying the header
self::$a_arr_Footnotes = array();
self::$a_bool_AllowLoveMe = true;
}
/**
* Outputs the custom css to the header of the public page.
*
* @author Stefan Herndler
* @since 1.5.0
*
* Edited:
* @since 2.1.1 option to hide ref container from start page
* @since 2.1.1 script for alternative tooltips
* @since 2.1.3 raise settings priority to override theme style sheets
* @since 2.1.4 tootip font size and backlink column width settings
* @since 2.2.5 options for label element and label bottom border, thanks to @markhillyer 2020-12-18T1447+0100
* @see
*/
public function wp_head() {
// insert start tag without switching out of PHP:
echo "\r\n\r\n";
// alternative tooltip script printed formatted not minified:
if ($l_bool_AlternativeTooltipsEnabled) {
?>
get(MCI_Footnotes_Settings::C_STR_REFERENCE_CONTAINER_POSITION) == "footer") {
echo $this->ReferenceContainer();
}
// get setting for love and share this plugin
$l_str_LoveMeIndex = MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_FOOTNOTES_LOVE);
// check if the admin allows to add a link to the footer
if (empty($l_str_LoveMeIndex) || strtolower($l_str_LoveMeIndex) == "no" || !self::$a_bool_AllowLoveMe) {
return;
}
// set a hyperlink to the word "footnotes" in the Love slug
$l_str_LinkedName = sprintf('%s', MCI_Footnotes_Config::C_STR_PLUGIN_PUBLIC_NAME);
// get random love me text
if (strtolower($l_str_LoveMeIndex) == "random") {
$l_str_LoveMeIndex = "text-" . rand(1,7);
}
switch ($l_str_LoveMeIndex) {
// options named wrt backcompat, simplest is default:
case "text-1": $l_str_LoveMeText = sprintf(__('I %2$s %1$s', MCI_Footnotes_Config::C_STR_PLUGIN_NAME), $l_str_LinkedName, MCI_Footnotes_Config::C_STR_LOVE_SYMBOL); break;
case "text-2": $l_str_LoveMeText = sprintf(__('This website uses the awesome %s plugin.', MCI_Footnotes_Config::C_STR_PLUGIN_NAME), $l_str_LinkedName); break;
case "text-4": $l_str_LoveMeText = sprintf('%s %s', $l_str_LinkedName, MCI_Footnotes_Config::C_STR_LOVE_SYMBOL); break;
case "text-5": $l_str_LoveMeText = sprintf('%s %s', MCI_Footnotes_Config::C_STR_LOVE_SYMBOL, $l_str_LinkedName); break;
case "text-6": $l_str_LoveMeText = sprintf(__('This website uses %s.', MCI_Footnotes_Config::C_STR_PLUGIN_NAME), $l_str_LinkedName); break;
case "text-7": $l_str_LoveMeText = sprintf(__('This website uses the %s plugin.', MCI_Footnotes_Config::C_STR_PLUGIN_NAME), $l_str_LinkedName); break;
case "text-3": default: $l_str_LoveMeText = sprintf('%s', $l_str_LinkedName); break;
}
echo sprintf('%s
', $l_str_LoveMeText);
}
/**
* Replaces footnotes in the post/page title.
*
* @author Stefan Herndler
* @since 1.5.0
* @param string $p_str_Content Widget content.
* @return string Content with replaced footnotes.
*/
public function the_title($p_str_Content) {
// appends the reference container if set to "post_end"
return $this->exec($p_str_Content, false);
}
/**
* Replaces footnotes in the content of the current page/post.
*
* @author Stefan Herndler
* @since 1.5.0
* @param string $p_str_Content Page/Post content.
* @return string Content with replaced footnotes.
*/
public function the_content($p_str_Content) {
// appends the reference container if set to "post_end"
return $this->exec($p_str_Content, MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_REFERENCE_CONTAINER_POSITION) == "post_end" ? true : false);
}
/**
* Replaces footnotes in the excerpt of the current page/post.
*
* @author Stefan Herndler
* @since 1.5.0
* @param string $p_str_Content Page/Post content.
* @return string Content with replaced footnotes.
*/
public function the_excerpt($p_str_Content) {
return $this->exec($p_str_Content, false, !MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_FOOTNOTES_IN_EXCERPT)));
}
/**
* Replaces footnotes in the widget title.
*
* @author Stefan Herndler
* @since 1.5.0
* @param string $p_str_Content Widget content.
* @return string Content with replaced footnotes.
*/
public function widget_title($p_str_Content) {
// appends the reference container if set to "post_end"
return $this->exec($p_str_Content, false);
}
/**
* Replaces footnotes in the content of the current widget.
*
* @author Stefan Herndler
* @since 1.5.0
* @param string $p_str_Content Widget content.
* @return string Content with replaced footnotes.
*/
public function widget_text($p_str_Content) {
// appends the reference container if set to "post_end"
return $this->exec($p_str_Content, MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_REFERENCE_CONTAINER_POSITION) == "post_end" ? true : false);
}
/**
* Replaces footnotes in each Content var of the current Post object.
*
* @author Stefan Herndler
* @since 1.5.4
* @param array|WP_Post $p_mixed_Posts
*/
public function the_post(&$p_mixed_Posts) {
// single WP_Post object received
if (!is_array($p_mixed_Posts)) {
$p_mixed_Posts = $this->replacePostObject($p_mixed_Posts);
return;
}
// array of WP_Post objects received
for($l_int_Index = 0; $l_int_Index < count($p_mixed_Posts); $l_int_Index++) {
$p_mixed_Posts[$l_int_Index] = $this->replacePostObject($p_mixed_Posts[$l_int_Index]);
}
}
/**
* Replace all Footnotes in a WP_Post object.
*
* @author Stefan Herndler
* @since 1.5.6
* @param WP_Post $p_obj_Post
* @return WP_Post
*/
private function replacePostObject($p_obj_Post) {
//MCI_Footnotes_Convert::debug($p_obj_Post);
$p_obj_Post->post_content = $this->exec($p_obj_Post->post_content);
$p_obj_Post->post_content_filtered = $this->exec($p_obj_Post->post_content_filtered);
$p_obj_Post->post_excerpt = $this->exec($p_obj_Post->post_excerpt);
return $p_obj_Post;
}
/**
* Replaces all footnotes that occur in the given content.
*
* @author Stefan Herndler
* @since 1.5.0
* @param string $p_str_Content Any string that may contain footnotes to be replaced.
* @param bool $p_bool_OutputReferences Appends the Reference Container to the output if set to true, default true.
* @param bool $p_bool_HideFootnotesText Hide footnotes found in the string.
* @return string
*
* Edited:
* @since 2.2.0 insert reference container at shortcode, thanks to @hamshe 2020-12-13T2057+0100
* @see
*
* @since 2.2.5 delete unused position shortcode, when position is widget or footer, thanks to @hamshe 2020-12-18T1434+0100
* @see
*/
public function exec($p_str_Content, $p_bool_OutputReferences = false, $p_bool_HideFootnotesText = false) {
// replace all footnotes in the content, settings are converted to html characters
$p_str_Content = $this->search($p_str_Content, true, $p_bool_HideFootnotesText);
// replace all footnotes in the content, settings are NOT converted to html characters
$p_str_Content = $this->search($p_str_Content, false, $p_bool_HideFootnotesText);
// append the reference container or insert at shortcode:
$l_str_ReferenceContainerPositionShortcode = MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_REFERENCE_CONTAINER_POSITION_SHORTCODE);
if ($p_bool_OutputReferences) {
if (strpos( $p_str_Content, $l_str_ReferenceContainerPositionShortcode ) !== false ) {
$p_str_Content = str_replace( $l_str_ReferenceContainerPositionShortcode, $this->ReferenceContainer(), $p_str_Content );
} else {
$p_str_Content .= $this->ReferenceContainer();
}
// increment the container ID:
self::$l_int_ReferenceContainerId++;
}
// delete position shortcode should any remain e.g. when ref container is in footer, thanks to @hamshe:
$p_str_Content = str_replace( $l_str_ReferenceContainerPositionShortcode, '', $p_str_Content );
// take a look if the LOVE ME slug should NOT be displayed on this page/post, remove the short code if found
if (strpos($p_str_Content, MCI_Footnotes_Config::C_STR_NO_LOVE_SLUG) !== false) {
self::$a_bool_AllowLoveMe = false;
$p_str_Content = str_replace(MCI_Footnotes_Config::C_STR_NO_LOVE_SLUG, "", $p_str_Content);
}
// return the content with replaced footnotes and optional reference container appended:
return $p_str_Content;
}
/**
* Replaces all footnotes in the given content and appends them to the static property.
*
* @author Stefan Herndler
* @since 1.5.0
* @param string $p_str_Content Content to be searched for footnotes.
* @param bool $p_bool_ConvertHtmlChars html encode settings, default true.
* @param bool $p_bool_HideFootnotesText Hide footnotes found in the string.
* @return string
*
* Edited since 2.0.0
*/
public function search($p_str_Content, $p_bool_ConvertHtmlChars, $p_bool_HideFootnotesText) {
// post ID to make everything unique wrt infinite scroll and archive view
self::$l_int_PostId = get_the_id();
// contains the index for the next footnote on this page
$l_int_FootnoteIndex = count(self::$a_arr_Footnotes) + 1;
// contains the starting position for the lookup of a footnote
$l_int_PosStart = 0;
// get start and end tag for the footnotes short code
$l_str_StartingTag = MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_FOOTNOTES_SHORT_CODE_START);
$l_str_EndingTag = MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_FOOTNOTES_SHORT_CODE_END);
if ($l_str_StartingTag == "userdefined" || $l_str_EndingTag == "userdefined") {
$l_str_StartingTag = MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_FOOTNOTES_SHORT_CODE_START_USER_DEFINED);
$l_str_EndingTag = MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_FOOTNOTES_SHORT_CODE_END_USER_DEFINED);
}
// decode html special chars
if ($p_bool_ConvertHtmlChars) {
$l_str_StartingTag = htmlspecialchars($l_str_StartingTag);
$l_str_EndingTag = htmlspecialchars($l_str_EndingTag);
}
// if footnotes short code is empty, return the content without changes
if (empty($l_str_StartingTag) || empty($l_str_EndingTag)) {
return $p_str_Content;
}
if (!$p_bool_HideFootnotesText) {
// load template file
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_FOOTNOTES_MOUSE_OVER_BOX_ALTERNATIVE))) {
$l_obj_Template = new MCI_Footnotes_Template(MCI_Footnotes_Template::C_STR_PUBLIC, "footnote-alternative");
} else {
$l_obj_Template = new MCI_Footnotes_Template(MCI_Footnotes_Template::C_STR_PUBLIC, "footnote");
}
$l_obj_TemplateTooltip = new MCI_Footnotes_Template(MCI_Footnotes_Template::C_STR_PUBLIC, "tooltip");
} else {
$l_obj_Template = null;
$l_obj_TemplateTooltip = null;
}
// search footnotes short codes in the content
do {
// get first occurrence of the footnote start tag short code:
$i_int_len_Content = strlen($p_str_Content);
if ($l_int_PosStart > $i_int_len_Content) $l_int_PosStart = $i_int_len_Content;
$l_int_PosStart = strpos($p_str_Content, $l_str_StartingTag, $l_int_PosStart);
// no short code found, stop here
if ($l_int_PosStart === false) {
break;
}
// get first occurrence of the footnote end tag short code:
$l_int_PosEnd = strpos($p_str_Content, $l_str_EndingTag, $l_int_PosStart);
// no short code found, stop here
if ($l_int_PosEnd === false) {
break;
}
// calculate the length of the footnote
$l_int_Length = $l_int_PosEnd - $l_int_PosStart;
// get footnote text
$l_str_FootnoteText = substr($p_str_Content, $l_int_PosStart + strlen($l_str_StartingTag), $l_int_Length - strlen($l_str_StartingTag));
/**
* URL line wrap
*
* Fix line wrapping of URLs (hyperlinked or not) based on pattern, not link element,
* to prevent them from hanging out of the tooltip in non-Unicode-compliant user agents.
* @see public.css
*
* spare however values of the href and the src arguments!
* @since 2.1.5 exclude image source too, thanks to @bjrnet21
* @see
*
* Even ARIA labels may take a URL as value, so use \w=[\'"] as a catch-all 2020-12-10T1005+0100
* @since 2.1.6 add catch-all exclusion to fix URL line wrapping, thanks to @a223123131 2020-12-09T1921+0100
* @see
*
* @since 2.1.6 option to disable URL line wrapping 2020-12-09T1606+0100
*
* URLs may be a query string in a URL:
* @since 2.2.6 make the quotation mark optional in the exclusion regex, thanks to @spiralofhope2 2020-12-23T0409+0100
* @see
* @since 2.2.7 revert that change in the exclusion regex, thanks to @rjl20, @spaceling, @friedrichnorth, @bernardzit 2020-12-23T1046+0100
* @see
* @see
* @since 2.2.8 correct lookbehind by duplicating it with and without quotation mark class 2020-12-23T1107+0100
* @since 2.2.9 account for RFC 2396 allowed characters in parameter names 2020-12-24T1956+0100
* @see
* @since 2.2.9 exclude URLs also where the equals sign is preceded by an entity or character reference 2020-12-25T1234+0100
* @since 2.2.10 support also file transfer protocol URLs 2020-12-25T2220+0100
*/
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_FOOTNOTE_URL_WRAP_ENABLED))) {
$l_str_FootnoteText = preg_replace( '#(?$1', $l_str_FootnoteText );
}
// Text to be displayed instead of the footnote
$l_str_FootnoteReplaceText = "";
// display the footnote referrers and the tooltips:
if (!$p_bool_HideFootnotesText) {
$l_int_Index = MCI_Footnotes_Convert::Index($l_int_FootnoteIndex, MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_FOOTNOTES_COUNTER_STYLE));
// display only a truncated footnote text if option enabled:
$l_str_ExcerptText = $l_str_FootnoteText;
$l_bool_EnableExcerpt = MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_FOOTNOTES_MOUSE_OVER_BOX_EXCERPT_ENABLED));
$l_int_MaxLength = intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_FOOTNOTES_MOUSE_OVER_BOX_EXCERPT_LENGTH));
if ($l_bool_EnableExcerpt) {
$l_str_DummyText = strip_tags($l_str_FootnoteText);
if (is_int($l_int_MaxLength) && strlen($l_str_DummyText) > $l_int_MaxLength) {
$l_str_ExcerptText = substr($l_str_DummyText, 0, $l_int_MaxLength);
$l_str_ExcerptText = substr($l_str_ExcerptText, 0, strrpos($l_str_ExcerptText, ' '));
$l_str_ExcerptText .= ' … ';
$l_str_ExcerptText .= '';
}
}
// define the HTML element to use for the referrers:
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_FOOTNOTES_REFERRER_SUPERSCRIPT_TAGS))) {
$l_str_SupSpan = 'sup';
} else {
$l_str_SupSpan = 'span';
}
// determine whether the link element is used, see below in ReferenceContainer()
$l_str_LinkSpan = MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_LINK_ELEMENT_ENABLED)) ? 'a' : 'span';
// fill in 'templates/public/footnote.html':
$l_obj_Template->replace(
array(
"post_id" => self::$l_int_PostId,
"container_id" => self::$l_int_ReferenceContainerId,
"note_id" => $l_int_Index,
"link-start" => $l_str_LinkSpan == 'a' ? '' : '',
"link-end" => $l_str_LinkSpan == 'a' ? '' : '',
"sup-span" => $l_str_SupSpan,
"before" => MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_FOOTNOTES_STYLING_BEFORE),
"index" => $l_int_Index,
"after" => MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_FOOTNOTES_STYLING_AFTER),
"text" => MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_FOOTNOTES_MOUSE_OVER_BOX_ENABLED)) ? $l_str_ExcerptText : "",
)
);
$l_str_FootnoteReplaceText = $l_obj_Template->getContent();
// reset the template
$l_obj_Template->reload();
if (
MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_FOOTNOTES_MOUSE_OVER_BOX_ENABLED)) &&
!MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_FOOTNOTES_MOUSE_OVER_BOX_ALTERNATIVE))
) {
$l_int_OffsetY = intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_FOOTNOTES_MOUSE_OVER_BOX_OFFSET_Y));
$l_int_OffsetX = intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_FOOTNOTES_MOUSE_OVER_BOX_OFFSET_X));
$l_int_FadeInDelay = intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_MOUSE_OVER_BOX_FADE_IN_DELAY ));
$l_int_FadeInDuration = intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_MOUSE_OVER_BOX_FADE_IN_DURATION ));
$l_int_FadeOutDelay = intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_MOUSE_OVER_BOX_FADE_OUT_DELAY ));
$l_int_FadeOutDuration = intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_MOUSE_OVER_BOX_FADE_OUT_DURATION));
// fill in 'templates/public/tooltip.html':
$l_obj_TemplateTooltip->replace(
array(
"post_id" => self::$l_int_PostId,
"container_id" => self::$l_int_ReferenceContainerId,
"note_id" => $l_int_Index,
"position" => MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_FOOTNOTES_MOUSE_OVER_BOX_POSITION),
"offset-y" => !empty($l_int_OffsetY) ? $l_int_OffsetY : 0,
"offset-x" => !empty($l_int_OffsetX) ? $l_int_OffsetX : 0,
"fade-in-delay" => !empty($l_int_FadeInDelay ) ? $l_int_FadeInDelay : 0,
"fade-in-duration" => !empty($l_int_FadeInDuration ) ? $l_int_FadeInDuration : 0,
"fade-out-delay" => !empty($l_int_FadeOutDelay ) ? $l_int_FadeOutDelay : 0,
"fade-out-duration" => !empty($l_int_FadeOutDuration) ? $l_int_FadeOutDuration : 0,
)
);
$l_str_FootnoteReplaceText .= $l_obj_TemplateTooltip->getContent();
$l_obj_TemplateTooltip->reload();
}
}
// replace the footnote with the template
$p_str_Content = substr_replace($p_str_Content, $l_str_FootnoteReplaceText, $l_int_PosStart, $l_int_Length + strlen($l_str_EndingTag));
// add footnote only if not empty
if (!empty($l_str_FootnoteText)) {
// set footnote to the output box at the end
self::$a_arr_Footnotes[] = $l_str_FootnoteText;
// increase footnote index
$l_int_FootnoteIndex++;
}
// add offset to the new starting position
$l_int_PosStart += $l_int_Length + strlen($l_str_EndingTag);
$l_int_PosStart = $l_int_Length + strlen($l_str_FootnoteReplaceText);
} while (true);
// return content
return $p_str_Content;
}
/**
* Generates the reference container.
*
* @author Stefan Herndler
* @since 1.5.0
* @return string
*
* Edited for 2.0.6: fixed line breaking behavior in footnote # clusters
* Edited for 2.1.1: fixed fragment IDs and backlinks with combine identical turned on 2020-11-14T1808+0100
*/
public function ReferenceContainer() {
// no footnotes have been replaced on this page:
if (empty(self::$a_arr_Footnotes)) {
return "";
}
/**
* OPTIONAL LINK ELEMENT FOR FOOTNOTE REFERRERS AND BACKLINKS
*
* STYLING:
* Link color is preferred for referrers and backlinks.
* Setting a global link color is a common feature in WordPress themes.
* CSS does not support identifiers for link colors (color: link | hover | active | visited)
* These are only supported as pseudo-classes of the link element.
* Hence the link element must be present for styling purposes.
* But styling these elements with the link color is not universally preferred.
* If not, the very presence of the link elements may need to be avoided.
*
* FUNCTIONALITY:
* Although widely used for that purpose, hyperlinks are disliked for footnote linking.
* Browsers may need to be prevented from logging these clicks in the browsing history,
* as logging compromises the usability of the 'return to previous' button in browsers.
* For that purpose, and for scroll animation, this linking is performed by JavaScript.
*
*
* @since 2.0.0 added the link elements with hard links
* @since 2.0.4 removed the hard links on user request
* @see
* @since 2.1.4 made link elements optional, 2020-11-25T1306+0100
*/
$l_str_LinkSpan = MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_LINK_ELEMENT_ENABLED)) ? 'a' : 'span';
/**
* FOOTNOTE INDEX BACKLINK SYMBOL
*
* @since 2.0.0 removed backlink symbol along with column 2 of the reference container
* @since 2.0.3 prepended an arrow on user request
* @since 2.0.4 restored the arrow select & symbol input setting
* @since 2.1.1 made the symbol optional instead of customizing it to invisible
*/
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_REFERENCE_CONTAINER_BACKLINK_SYMBOL_ENABLE))) {
// get html arrow
$l_str_Arrow = MCI_Footnotes_Convert::getArrow(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_HYPERLINK_ARROW));
// set html arrow to the first one if invalid index defined
if (is_array($l_str_Arrow)) {
$l_str_Arrow = MCI_Footnotes_Convert::getArrow(0);
}
// get user defined arrow
$l_str_ArrowUserDefined = MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_HYPERLINK_ARROW_USER_DEFINED);
if (!empty($l_str_ArrowUserDefined)) {
$l_str_Arrow = $l_str_ArrowUserDefined;
}
// wrap the arrow in a @media print { display:hidden } span:
$l_str_FootnoteArrow = '';
} else {
// if it is not, set arrow to empty:
$l_str_Arrow = '';
$l_str_FootnoteArrow = '';
}
/**
* BACKLINK SEPARATOR
*
* Initially a comma was appended in this algorithm for enumerations.
* The comma in enumerations is not generally preferred.
* @since 2.1.4 the separator is optional, has options, and is customizable:
*/
// check if it is even enabled:
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_BACKLINKS_SEPARATOR_ENABLED))) {
// if so, check if it is customized:
$l_str_Separator = MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_BACKLINKS_SEPARATOR_CUSTOM);
if (empty($l_str_Separator)) {
// if it is not, check which option is on:
$l_str_SeparatorOption = MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_BACKLINKS_SEPARATOR_OPTION);
switch ($l_str_SeparatorOption) {
case 'comma' : $l_str_Separator = ','; break;
case 'semicolon': $l_str_Separator = ';'; break;
case 'en_dash' : $l_str_Separator = ' –'; break;
}
}
} else {
$l_str_Separator = '';
}
/**
* BACKLINK TERMINATOR
*
* Initially a dot was appended in the table row template.
* @since 2.0.6 a dot after footnote numbers is discarded as not localizable;
* making it optional was envisaged.
* @since 2.1.4 the terminator is optional, has options, and is customizable:
*/
// check if it is even enabled:
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_BACKLINKS_TERMINATOR_ENABLED))) {
// if so, check if it is customized:
$l_str_Terminator = MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_BACKLINKS_TERMINATOR_CUSTOM);
if (empty($l_str_Terminator)) {
// if it is not, check which option is on:
$l_str_TerminatorOption = MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_BACKLINKS_TERMINATOR_OPTION);
switch ($l_str_TerminatorOption) {
case 'period' : $l_str_Terminator = '.'; break;
case 'parenthesis': $l_str_Terminator = ')'; break;
case 'colon' : $l_str_Terminator = ':'; break;
}
}
} else {
$l_str_Terminator = '';
}
/**
* LINE BREAKS
*
* The backlinks of combined footnotes are generally preferred in an enumeration.
* But when few footnotes are identical, stacking the items in list form is better.
* Variable number length and proportional character width require explicit line breaks.
* Otherwise, an ordinary space character offering a line break opportunity is inserted.
*/
$l_str_LineBreak = MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_BACKLINKS_LINE_BREAKS_ENABLED)) ? '
' : ' ';
/**
* For maintenance and support, table rows in the reference container should be
* separated by an empty line. So we add these line breaks for source readability.
* Before the first table row (breaks between rows are ~200 lines below):
*/
$l_str_Body = "\r\n\r\n";
// REFERENCE CONTAINER TABLE ROW TEMPLATE LOAD
// when combining identical footnotes is turned on, another template is needed:
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_COMBINE_IDENTICAL_FOOTNOTES))) {
// the combining template allows for backlink clusters and supports cell clicking for single notes:
$l_obj_Template = new MCI_Footnotes_Template(MCI_Footnotes_Template::C_STR_PUBLIC, "reference-container-body-combi");
} else {
// when 3-column layout is turned on (only available if combining is turned off):
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_REFERENCE_CONTAINER_3COLUMN_LAYOUT_ENABLE))) {
$l_obj_Template = new MCI_Footnotes_Template(MCI_Footnotes_Template::C_STR_PUBLIC, "reference-container-body-3column");
} else {
// when switch symbol and index is turned on, and combining and 3-columns are off:
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_REFERENCE_CONTAINER_BACKLINK_SYMBOL_SWITCH))) {
$l_obj_Template = new MCI_Footnotes_Template(MCI_Footnotes_Template::C_STR_PUBLIC, "reference-container-body-switch");
} else {
// default is the standard template:
$l_obj_Template = new MCI_Footnotes_Template(MCI_Footnotes_Template::C_STR_PUBLIC, "reference-container-body");
}
}
}
// SET SWITCH FLAG INDEPENDENTLY
if (MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_REFERENCE_CONTAINER_BACKLINK_SYMBOL_SWITCH))) {
$l_bool_SymbolSwitch = true;
} else {
$l_bool_SymbolSwitch = false;
}
// FILL IN THE TEMPLATE
// loop through all footnotes found in the page
for ($l_int_Index = 0; $l_int_Index < count(self::$a_arr_Footnotes); $l_int_Index++) {
// TEXT COLUMN
// get footnote text
$l_str_FootnoteText = self::$a_arr_Footnotes[$l_int_Index];
// if footnote is empty, get to the next one
// With combine identical turned on, identicals will be deleted and are skipped:
if (empty($l_str_FootnoteText)) {
continue;
}
// INDEX COLUMN WITH ONE BACKLINK PER TABLE ROW
// Standard behavior appropriate for combining identicals turned off
// generate content of footnote index cell
$l_int_FirstFootnoteIndex = ($l_int_Index + 1);
// get the footnote index string and
// keep supporting legacy index placeholder:
$l_str_FootnoteIndex = MCI_Footnotes_Convert::Index(($l_int_Index + 1), MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_FOOTNOTES_COUNTER_STYLE));
// SUPPORT FOR COMBINING IDENTICALS: COMPOSE ENUMERATED BACKLINKS
if ( MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_COMBINE_IDENTICAL_FOOTNOTES))) {
$l_str_FootnoteId = $l_str_FootnoteIndex;
// in case the footnote is unique:
$l_str_FootnoteReference = "<$l_str_LinkSpan";
$l_str_FootnoteReference .= ' id="footnote_plugin_reference_';
$l_str_FootnoteReference .= self::$l_int_PostId;
$l_str_FootnoteReference .= '_' . self::$l_int_ReferenceContainerId;
$l_str_FootnoteReference .= "_$l_str_FootnoteId\"";
$l_str_FootnoteReference .= ' class="footnote_backlink"';
// the click event goes in the table cell:
$l_str_BacklinkEvent = ' onclick="footnote_moveToAnchor_';
$l_str_BacklinkEvent .= self::$l_int_PostId;
$l_str_BacklinkEvent .= '_' . self::$l_int_ReferenceContainerId;
$l_str_BacklinkEvent .= "('footnote_plugin_tooltip_";
$l_str_BacklinkEvent .= self::$l_int_PostId;
$l_str_BacklinkEvent .= '_' . self::$l_int_ReferenceContainerId;
$l_str_BacklinkEvent .= "_$l_str_FootnoteId');\"";
// the dedicated template enumerating backlinks uses another variable:
$l_str_FootnoteBacklinks = $l_str_FootnoteReference;
$l_str_FootnoteBacklinks .= $l_str_BacklinkEvent;
// continue both single note and notes cluster, depending on switch option status:
if ($l_bool_SymbolSwitch) {
$l_str_FootnoteReference .= ">$l_str_FootnoteId$l_str_FootnoteArrow";
$l_str_FootnoteBacklinks .= ">$l_str_FootnoteId$l_str_FootnoteArrow";
} else {
$l_str_FootnoteReference .= ">$l_str_FootnoteArrow$l_str_FootnoteId";
$l_str_FootnoteBacklinks .= ">$l_str_FootnoteArrow$l_str_FootnoteId";
}
// If that is the only footnote with this text, we’re nearly done.
// check if it isn't the last footnote in the array:
if ($l_int_FirstFootnoteIndex < count(self::$a_arr_Footnotes)) {
// get all footnotes that haven't passed yet:
for ($l_int_CheckIndex = $l_int_FirstFootnoteIndex; $l_int_CheckIndex < count(self::$a_arr_Footnotes); $l_int_CheckIndex++) {
// check if a further footnote is the same as the actual one:
if ($l_str_FootnoteText == self::$a_arr_Footnotes[$l_int_CheckIndex]) {
// if so, set the further footnote as empty so it won't be displayed later:
self::$a_arr_Footnotes[$l_int_CheckIndex] = "";
// cancel the event altogether:
$l_str_BacklinkEvent = "";
// HERE GOES THE FRAGMENT IDENTIFIER AND THE BACKLINK TOO:
// add the footnote index to the actual index:
// update the footnote ID:
$l_str_FootnoteId = MCI_Footnotes_Convert::Index(($l_int_CheckIndex + 1), MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_FOOTNOTES_COUNTER_STYLE));
// resume composing the backlinks enumeration:
$l_str_FootnoteBacklinks .= "$l_str_Separator";
$l_str_FootnoteBacklinks .= "$l_str_LineBreak<$l_str_LinkSpan";
$l_str_FootnoteBacklinks .= ' id="footnote_plugin_reference_';
$l_str_FootnoteBacklinks .= self::$l_int_PostId;
$l_str_FootnoteBacklinks .= '_' . self::$l_int_ReferenceContainerId;
$l_str_FootnoteBacklinks .= "_$l_str_FootnoteId";
$l_str_FootnoteBacklinks .= '" class="footnote_backlink" ';
$l_str_FootnoteBacklinks .= 'onclick="footnote_moveToAnchor_';
$l_str_FootnoteBacklinks .= self::$l_int_PostId;
$l_str_FootnoteBacklinks .= '_' . self::$l_int_ReferenceContainerId;
$l_str_FootnoteBacklinks .= "('footnote_plugin_tooltip_";
$l_str_FootnoteBacklinks .= self::$l_int_PostId;
$l_str_FootnoteBacklinks .= '_' . self::$l_int_ReferenceContainerId;
$l_str_FootnoteBacklinks .= "_$l_str_FootnoteId');\">";
$l_str_FootnoteBacklinks .= $l_bool_SymbolSwitch ? '' : $l_str_FootnoteArrow;
$l_str_FootnoteBacklinks .= $l_str_FootnoteId;
$l_str_FootnoteBacklinks .= $l_bool_SymbolSwitch ? $l_str_FootnoteArrow : '';
}
}
}
$l_str_FootnoteReference .= "$l_str_Terminator";
$l_str_FootnoteBacklinks .= "$l_str_Terminator";
}
// line wrapping of URLs already fixed, see above
// replace all placeholders in 'templates/public/reference-container-body.html'
// or in 'templates/public/reference-container-body-combi.html'
// or in 'templates/public/reference-container-body-3column.html'
// or in 'templates/public/reference-container-body-switch.html'
$l_obj_Template->replace(
array(
// placeholder used in all templates:
"text" => $l_str_FootnoteText,
// used in standard layout W/O COMBINED FOOTNOTES:
"post_id" => self::$l_int_PostId,
"container_id" => self::$l_int_ReferenceContainerId,
"note_id" => MCI_Footnotes_Convert::Index($l_int_FirstFootnoteIndex, MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_FOOTNOTES_COUNTER_STYLE)),
"link-start" => $l_str_LinkSpan == 'a' ? '' : '',
"link-end" => $l_str_LinkSpan == 'a' ? '' : '',
"link-span" => $l_str_LinkSpan,
"terminator" => $l_str_Terminator,
// used in standard layout WITH COMBINED IDENTICALS TURNED ON:
"pointer" => empty($l_str_BacklinkEvent) ? '' : ' pointer',
"event" => $l_str_BacklinkEvent,
"backlinks" => empty($l_str_BacklinkEvent) ? $l_str_FootnoteBacklinks : $l_str_FootnoteReference,
// Legacy placeholders for use in legacy layout templates:
"arrow" => $l_str_FootnoteArrow,
"index" => $l_str_FootnoteIndex,
)
);
$l_str_Body .= $l_obj_Template->getContent();
// extra line breaks for page source readability:
$l_str_Body .= "\r\n\r\n";
$l_obj_Template->reload();
}
// streamline:
$l_bool_CollapseDefault = MCI_Footnotes_Convert::toBool(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_BOOL_REFERENCE_CONTAINER_COLLAPSE));
// load 'templates/public/reference-container.html':
$l_obj_TemplateContainer = new MCI_Footnotes_Template(MCI_Footnotes_Template::C_STR_PUBLIC, "reference-container");
$l_obj_TemplateContainer->replace(
array(
"post_id" => self::$l_int_PostId,
"container_id" => self::$l_int_ReferenceContainerId,
"element" => MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_REFERENCE_CONTAINER_LABEL_ELEMENT),
"name" => MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_STR_REFERENCE_CONTAINER_NAME),
"button-style" => !$l_bool_CollapseDefault ? 'display: none;' : '',
"style" => $l_bool_CollapseDefault ? 'display: none;' : '',
"content" => $l_str_Body,
"scroll-offset" => (intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_FOOTNOTES_SCROLL_OFFSET)) / 100),
"scroll-duration" => intval(MCI_Footnotes_Settings::instance()->get(MCI_Footnotes_Settings::C_INT_FOOTNOTES_SCROLL_DURATION)),
)
);
// free all found footnotes if reference container will be displayed
self::$a_arr_Footnotes = array();
return $l_obj_TemplateContainer->getContent();
}
}