Administration: Increase frequency of heartbeat API requests.

Increases the frequency of heartbeat API requests from once every 15 seconds to once every 10 seconds.

The purpose of this change is to reduce the length of time before a post becomes unlocked as a user navigates around the WordPress Dashboard and ceases editing a post.

`wp.heartbeat.interval()` has been modified to allow theme and plugin authors to set the heartbeat interval to any value between one second and one hour rather than limiting them to a fixed set of values.

Props azaozz, annezazu, jorbin, kirasong.
Fixes #61960.


git-svn-id: https://develop.svn.wordpress.org/trunk@59016 602fd350-edb4-49c9-b593-d223f7449a82

src/js/_enqueues/admin/inline-edit-post.js

@@ -250,7 +250,7 @@ window.wp = window.wp || {};
 				if ( ! $( this ).parent().find( 'input[name="indeterminate_post_category[]"]' ).length ) {
 					// Get the term label text.
 					var label = $( this ).parent().text();
-					// Set indeterminate states for the backend. Add accessible text for indeterminate inputs. 
+					// Set indeterminate states for the backend. Add accessible text for indeterminate inputs.
 					$( this ).after( '<input type="hidden" name="indeterminate_post_category[]" value="' + $( this ).val() + '">' ).attr( 'aria-label', label.trim() + ': ' + wp.i18n.__( 'Some selected posts have this category' ) );
 				}
 			}
@@ -603,9 +603,9 @@ $( function() { inlineEditPost.init(); } );
 // Show/hide locks on posts.
 $( function() {
 
-	// Set the heartbeat interval to 15 seconds.
+	// Set the heartbeat interval to 10 seconds.
 	if ( typeof wp !== 'undefined' && wp.heartbeat ) {
-		wp.heartbeat.interval( 15 );
+		wp.heartbeat.interval( 10 );
 	}
 }).on( 'heartbeat-tick.wp-check-locked-posts', function( e, data ) {
 	var locked = data['wp-check-locked-posts'] || {};

src/js/_enqueues/admin/post.js

@@ -343,9 +343,9 @@ jQuery( function($) {
 		}
 	}).filter(':visible').find('.wp-tab-first').trigger( 'focus' );
 
-	// Set the heartbeat interval to 15 seconds if post lock dialogs are enabled.
+	// Set the heartbeat interval to 10 seconds if post lock dialogs are enabled.
 	if ( wp.heartbeat && $('#post-lock-dialog').length ) {
-		wp.heartbeat.interval( 15 );
+		wp.heartbeat.interval( 10 );
 	}
 
 	// The form is being submitted by the user.

src/js/_enqueues/wp/heartbeat.js

@@ -132,16 +132,17 @@
 				}
 
 				/*
-				 * The interval can be from 15 to 120 seconds and can be set temporarily to 5 seconds.
-				 * It can be set in the initial options or changed later through JS and/or through PHP.
+				 * Logic check: the interval can be from 1 to 3600 seconds and can be set temporarily
+				 * to 5 seconds. It can be set in the initial options or changed later from JS
+				 * or from PHP through the AJAX responses.
 				 */
 				if ( options.interval ) {
 					settings.mainInterval = options.interval;
 
-					if ( settings.mainInterval < 15 ) {
-						settings.mainInterval = 15;
-					} else if ( settings.mainInterval > 120 ) {
-						settings.mainInterval = 120;
+					if ( settings.mainInterval < 1 ) {
+						settings.mainInterval = 1;
+					} else if ( settings.mainInterval > 3600 ) {
+						settings.mainInterval = 3600;
 					}
 				}
 
@@ -721,10 +722,10 @@
 		 *
 		 * @memberOf wp.heartbeat.prototype
 		 *
-		 * @param {string|number} speed Interval: 'fast' or 5, 15, 30, 60, 120.
+		 * @param {string|number} speed Interval: 'fast' or integer between 1 and 3600 (seconds).
 		 *                              Fast equals 5.
-		 * @param {string}        ticks Tells how many ticks before the interval reverts
-		 *                              back. Used with speed = 'fast' or 5.
+		 * @param {number}        ticks Tells how many ticks before the interval reverts back.
+		 *                              Value must be between 1 and 30. Used with speed = 'fast' or 5.
 		 *
 		 * @return {number} Current interval in seconds.
 		 */
@@ -733,35 +734,28 @@
 				oldInterval = settings.tempInterval ? settings.tempInterval : settings.mainInterval;
 
 			if ( speed ) {
-				switch ( speed ) {
-					case 'fast':
-					case 5:
-						newInterval = 5000;
-						break;
-					case 15:
-						newInterval = 15000;
-						break;
-					case 30:
-						newInterval = 30000;
-						break;
-					case 60:
-						newInterval = 60000;
-						break;
-					case 120:
-						newInterval = 120000;
-						break;
-					case 'long-polling':
-						// Allow long polling (experimental).
-						settings.mainInterval = 0;
-						return 0;
-					default:
+				if ( 'fast' === speed ) {
+					// Special case, see below.
+					newInterval = 5000;
+				} else if ( 'long-polling' === speed ) {
+					// Allow long polling (experimental).
+					settings.mainInterval = 0;
+					return 0;
+				} else {
+					speed = parseInt( speed, 10 );
+
+					if ( speed >= 1 && speed <= 3600 ) {
+						newInterval = speed * 1000;
+					} else {
 						newInterval = settings.originalInterval;
+					}
 				}
 
 				if ( settings.minimalInterval && newInterval < settings.minimalInterval ) {
 					newInterval = settings.minimalInterval;
 				}
 
+				// Special case, runs for a number of ticks then reverts to the previous interval.
 				if ( 5000 === newInterval ) {
 					ticks = parseInt( ticks, 10 ) || 30;
 					ticks = ticks < 1 || ticks > 30 ? 30 : ticks;

src/wp-admin/edit-form-blocks.php

@@ -123,6 +123,14 @@ static function ( $classes ) {
 	'before'
 );
 
+// Set Heartbeat interval to 10 seconds, used to refresh post locks.
+wp_add_inline_script(
+	'heartbeat',
+	'if ( window.wp && window.wp.heartbeat ) {
+		window.wp.heartbeat.interval( 10 );
+	}'
+);
+
 /*
  * Get all available templates for the post/page attributes meta-box.
  * The "Default template" array element should only be added if the array is