stklcode/wp-liveticker
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update ticker immediately, if not prefilled by backend

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When a ticker is added by a Gutenberg block, it is initially empty. This
can be detected by checking the "last" flag for 0 value. If found, the
ticker is now updated immediately by the AJAX function and not waiting
for the poll interval to trigger.
This commit is contained in:
Stefan Kalscheuer 2019-11-23 18:11:34 +01:00
parent fc4783d07a
commit b88e1c2903
1 changed files with 21 additions and 3 deletions
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22
scripts/liveticker.js
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@ -12,6 +12,8 @@ function scLiveticker() {
* @return {void} * @return {void}
*/ */
scLiveticker.init = function() { scLiveticker.init = function() {
var updateNow = false;
// Opt out if AJAX pobject not present. // Opt out if AJAX pobject not present.
if ( 'undefined' === typeof sclivetickerAjax ) { if ( 'undefined' === typeof sclivetickerAjax ) {
return; return;
@ -27,15 +29,21 @@ scLiveticker.init = function() {
document.querySelectorAll( 'div.wp-block-scliveticker-ticker.sclt-ajax' ), document.querySelectorAll( 'div.wp-block-scliveticker-ticker.sclt-ajax' ),
function( elem ) { function( elem ) {
var list = elem.querySelector( 'ul' ); var list = elem.querySelector( 'ul' );
var last = Number( elem.getAttribute( 'data-sclt-last' ) );
if ( ! list ) { if ( ! list ) {
list = document.createElement( 'ul' ); list = document.createElement( 'ul' );
elem.appendChild( list ); elem.appendChild( list );
} }
if ( 0 === last ) {
updateNow = true;
}
return { return {
s: elem.getAttribute( 'data-sclt-ticker' ), s: elem.getAttribute( 'data-sclt-ticker' ),
l: elem.getAttribute( 'data-sclt-limit' ), l: elem.getAttribute( 'data-sclt-limit' ),
t: elem.getAttribute( 'data-sclt-last' ), t: last,
e: list, e: list,
}; };
} }
@ -46,15 +54,21 @@ scLiveticker.init = function() {
document.querySelectorAll( 'div.wp-widget-scliveticker-ticker.sclt-ajax' ), document.querySelectorAll( 'div.wp-widget-scliveticker-ticker.sclt-ajax' ),
function( elem ) { function( elem ) {
var list = elem.querySelector( 'ul' ); var list = elem.querySelector( 'ul' );
var last = Number( elem.getAttribute( 'data-sclt-last' ) );
if ( ! list ) { if ( ! list ) {
list = document.createElement( 'ul' ); list = document.createElement( 'ul' );
elem.appendChild( list ); elem.appendChild( list );
} }
if ( 0 === last ) {
updateNow = true;
}
return { return {
w: elem.getAttribute( 'data-sclt-ticker' ), w: elem.getAttribute( 'data-sclt-ticker' ),
l: elem.getAttribute( 'data-sclt-limit' ), l: elem.getAttribute( 'data-sclt-limit' ),
t: elem.getAttribute( 'data-sclt-last' ), t: last,
e: list, e: list,
}; };
} }
@ -62,8 +76,12 @@ scLiveticker.init = function() {
// Trigger update, if necessary. // Trigger update, if necessary.
if ( ( 0 < scLiveticker.ticker.length || scLiveticker.widgets.length ) && 0 < scLiveticker.pollInterval ) { if ( ( 0 < scLiveticker.ticker.length || scLiveticker.widgets.length ) && 0 < scLiveticker.pollInterval ) {
if ( updateNow ) {
scLiveticker.update();
} else {
setTimeout( scLiveticker.update, scLiveticker.pollInterval ); setTimeout( scLiveticker.update, scLiveticker.pollInterval );
} }
}
}; };
/** /**