Docs: Improve JS Docs for `wp-includes/js/heartbeat.js`.
Most of the documentation was already present. This change achieves the following: * Fixes the formatting for most doc blocks. * Adds `@since` tags to all functions. * Makes sure the heartbeat public methods are correctly added to the `wp.heartbeat` namespace. Props andizer, jjcomack, carolinegeven. Fixes #42675. git-svn-id: https://develop.svn.wordpress.org/trunk@42389 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Anton Timmermans
parent
f216215864
commit
a5ff0c67c9
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@ -27,73 +27,89 @@
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*/
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( function( $, window, undefined ) {
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/**
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* Constructs the Heartbeat API.
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*
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* @since 3.6.0
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*
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* @returns {Object} An instance of the Heartbeat class.
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* @constructor
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*/
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var Heartbeat = function() {
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var $document = $(document),
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settings = {
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// Suspend/resume
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// Suspend/resume.
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suspend: false,
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// Whether suspending is enabled
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// Whether suspending is enabled.
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suspendEnabled: true,
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// Current screen id, defaults to the JS global 'pagenow' when present (in the admin) or 'front'
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// Current screen id, defaults to the JS global 'pagenow' when present
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// (in the admin) or 'front'.
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screenId: '',
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// XHR request URL, defaults to the JS global 'ajaxurl' when present
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// XHR request URL, defaults to the JS global 'ajaxurl' when present.
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url: '',
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// Timestamp, start of the last connection request
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// Timestamp, start of the last connection request.
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lastTick: 0,
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// Container for the enqueued items
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// Container for the enqueued items.
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queue: {},
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// Connect interval (in seconds)
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// Connect interval (in seconds).
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mainInterval: 60,
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// Used when the interval is set to 5 sec. temporarily
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// Used when the interval is set to 5 sec. temporarily.
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tempInterval: 0,
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// Used when the interval is reset
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// Used when the interval is reset.
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originalInterval: 0,
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// Used to limit the number of AJAX requests.
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minimalInterval: 0,
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// Used together with tempInterval
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// Used together with tempInterval.
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countdown: 0,
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// Whether a connection is currently in progress
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// Whether a connection is currently in progress.
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connecting: false,
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// Whether a connection error occurred
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// Whether a connection error occurred.
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connectionError: false,
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// Used to track non-critical errors
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// Used to track non-critical errors.
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errorcount: 0,
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// Whether at least one connection has completed successfully
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// Whether at least one connection has been completed successfully.
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hasConnected: false,
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// Whether the current browser window is in focus and the user is active
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// Whether the current browser window is in focus and the user is active.
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hasFocus: true,
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// Timestamp, last time the user was active. Checked every 30 sec.
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userActivity: 0,
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// Flags whether events tracking user activity were set
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// Flag whether events tracking user activity were set.
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userActivityEvents: false,
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// Timer that keeps track of how long a user has focus.
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checkFocusTimer: 0,
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// Timer that keeps track of how long needs to be waited before connecting to
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// the server again.
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beatTimer: 0
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};
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/**
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* Set local vars and events, then start
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* Sets local variables and events, then starts the heartbeat.
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*
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* @access private
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*
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* @return void
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* @since 3.8.0
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*
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* @returns {void}
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*/
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function initialize() {
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var options, hidden, visibilityState, visibilitychange;
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@ -106,17 +122,20 @@
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settings.url = window.ajaxurl;
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}
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// Pull in options passed from PHP
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// Pull in options passed from PHP.
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if ( typeof window.heartbeatSettings === 'object' ) {
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options = window.heartbeatSettings;
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// The XHR URL can be passed as option when window.ajaxurl is not set
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// The XHR URL can be passed as option when window.ajaxurl is not set.
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if ( ! settings.url && options.ajaxurl ) {
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settings.url = options.ajaxurl;
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}
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// The interval can be from 15 to 120 sec. and can be set temporarily to 5 sec.
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// It can be set in the initial options or changed later from JS and/or from PHP.
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/*
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* The interval can be from 15 to 120 sec. and can be set temporarily to 5 sec.
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* It can be set in the initial options or changed later through JS and/or
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* through PHP.
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*/
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if ( options.interval ) {
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settings.mainInterval = options.interval;
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@ -127,11 +146,14 @@
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}
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}
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// Used to limit the number of AJAX requests. Overrides all other intervals if they are shorter.
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// Needed for some hosts that cannot handle frequent requests and the user may exceed the allocated server CPU time, etc.
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// The minimal interval can be up to 600 sec. however setting it to longer than 120 sec. will limit or disable
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// some of the functionality (like post locks).
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// Once set at initialization, minimalInterval cannot be changed/overridden.
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/*
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* Used to limit the number of AJAX requests. Overrides all other intervals if
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* they are shorter. Needed for some hosts that cannot handle frequent requests
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* and the user may exceed the allocated server CPU time, etc. The minimal
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* interval can be up to 600 sec. however setting it to longer than 120 sec.
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* will limit or disable some of the functionality (like post locks). Once set
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* at initialization, minimalInterval cannot be changed/overridden.
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*/
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if ( options.minimalInterval ) {
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options.minimalInterval = parseInt( options.minimalInterval, 10 );
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settings.minimalInterval = options.minimalInterval > 0 && options.minimalInterval <= 600 ? options.minimalInterval * 1000 : 0;
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@ -141,7 +163,8 @@
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settings.mainInterval = settings.minimalInterval;
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}
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// 'screenId' can be added from settings on the front end where the JS global 'pagenow' is not set
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// 'screenId' can be added from settings on the front end where the JS global
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// 'pagenow' is not set.
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if ( ! settings.screenId ) {
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settings.screenId = options.screenId || 'front';
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}
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@ -151,13 +174,16 @@
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}
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}
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// Convert to milliseconds
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// Convert to milliseconds.
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settings.mainInterval = settings.mainInterval * 1000;
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settings.originalInterval = settings.mainInterval;
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// Switch the interval to 120 sec. by using the Page Visibility API.
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// If the browser doesn't support it (Safari < 7, Android < 4.4, IE < 10), the interval
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// will be increased to 120 sec. after 5 min. of mouse and keyboard inactivity.
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/*
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* Switch the interval to 120 seconds by using the Page Visibility API.
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* If the browser doesn't support it (Safari < 7, Android < 4.4, IE < 10), the
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* interval will be increased to 120 seconds after 5 minutes of mouse and keyboard
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* inactivity.
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*/
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if ( typeof document.hidden !== 'undefined' ) {
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hidden = 'hidden';
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visibilitychange = 'visibilitychange';
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@ -196,10 +222,10 @@
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}
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$(window).on( 'unload.wp-heartbeat', function() {
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// Don't connect any more
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// Don't connect anymore.
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settings.suspend = true;
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// Abort the last request if not completed
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// Abort the last request if not completed.
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if ( settings.xhr && settings.xhr.readyState !== 4 ) {
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settings.xhr.abort();
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}
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@ -208,7 +234,7 @@
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// Check for user activity every 30 seconds.
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window.setInterval( checkUserActivity, 30000 );
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// Start one tick after DOM ready
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// Start one tick after DOM ready.
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$document.ready( function() {
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settings.lastTick = time();
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scheduleNextTick();
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@ -216,28 +242,34 @@
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}
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/**
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* Return the current time according to the browser
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* Returns the current time according to the browser.
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*
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* @access private
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*
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* @return int
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* @since 3.6.0
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*
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* @returns {number} Returns the current time.
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*/
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function time() {
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return (new Date()).getTime();
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}
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/**
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* Check if the iframe is from the same origin
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* Checks if the iframe is from the same origin.
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*
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* @access private
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*
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* @return bool
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* @since 3.6.0
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*
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* @returns {boolean} Returns whether or not the iframe is from the same origin.
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*/
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function isLocalFrame( frame ) {
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var origin, src = frame.src;
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// Need to compare strings as WebKit doesn't throw JS errors when iframes have different origin.
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// It throws uncatchable exceptions.
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/*
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* Need to compare strings as WebKit doesn't throw JS errors when iframes have
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* different origin. It throws uncatchable exceptions.
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*/
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if ( src && /^https?:\/\//.test( src ) ) {
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origin = window.location.origin ? window.location.origin : window.location.protocol + '//' + window.location.host;
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}
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/**
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* Check if the document's focus has changed
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* Checks if the document's focus has changed.
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*
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* @access private
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*
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* @return void
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* @since 4.1.0
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*
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* @returns {void}
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*/
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function checkFocus() {
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if ( settings.hasFocus && ! document.hasFocus() ) {
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}
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/**
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* Set error state and fire an event on XHR errors or timeout
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* Sets error state and fires an event on XHR errors or timeout.
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*
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* @access private
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*
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* @param string error The error type passed from the XHR
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* @param int status The HTTP status code passed from jqXHR (200, 404, 500, etc.)
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* @return void
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* @since 3.8.0
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*
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* @param {string} error The error type passed from the XHR.
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* @param {number} status The HTTP status code passed from jqXHR
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* (200, 404, 500, etc.).
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*
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* @returns {void}
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*/
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function setErrorState( error, status ) {
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var trigger;
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if ( error ) {
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switch ( error ) {
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case 'abort':
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// do nothing
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// Do nothing.
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break;
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case 'timeout':
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// no response for 30 sec.
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// No response for 30 sec.
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trigger = true;
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break;
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case 'error':
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}
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/**
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* Clear the error state and fire an event
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* Clears the error state and fires an event if there is a connection error.
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*
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* @access private
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*
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* @return void
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* @since 3.8.0
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*
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* @returns {void}
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*/
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function clearErrorState() {
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// Has connected successfully
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// Has connected successfully.
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settings.hasConnected = true;
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if ( hasConnectionError() ) {
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@ -335,11 +375,13 @@
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}
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/**
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* Gather the data and connect to the server
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* Gathers the data and connects to the server.
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*
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* @access private
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*
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* @return void
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* @since 3.6.0
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*
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* @returns {void}
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*/
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function connect() {
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var ajaxData, heartbeatData;
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settings.lastTick = time();
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heartbeatData = $.extend( {}, settings.queue );
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// Clear the data queue, anything added after this point will be send on the next tick
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// Clear the data queue. Anything added after this point will be sent on the next tick.
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settings.queue = {};
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$document.trigger( 'heartbeat-send', [ heartbeatData ] );
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@ -403,7 +445,7 @@
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$document.trigger( 'heartbeat-tick', [response, textStatus, jqXHR] );
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// Do this last, can trigger the next XHR if connection time > 5 sec. and newInterval == 'fast'
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// Do this last. Can trigger the next XHR if connection time > 5 sec. and newInterval == 'fast'.
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if ( newInterval ) {
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interval( newInterval );
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}
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@ -414,13 +456,15 @@
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}
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/**
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* Schedule the next connection
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* Schedules the next connection.
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*
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* Fires immediately if the connection time is longer than the interval.
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*
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* @access private
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*
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* @return void
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* @since 3.8.0
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*
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* @returns {void}
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*/
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function scheduleNextTick() {
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var delta = time() - settings.lastTick,
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@ -460,22 +504,26 @@
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}
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/**
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* Set the internal state when the browser window becomes hidden or loses focus
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* Sets the internal state when the browser window becomes hidden or loses focus.
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*
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* @access private
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*
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* @return void
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* @since 3.6.0
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*
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* @returns {void}
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*/
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function blurred() {
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settings.hasFocus = false;
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}
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/**
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* Set the internal state when the browser window becomes visible or is in focus
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* Sets the internal state when the browser window becomes visible or is in focus.
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*
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* @access private
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*
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* @return void
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* @since 3.6.0
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*
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* @returns {void}
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*/
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function focused() {
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settings.userActivity = time();
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@ -490,11 +538,13 @@
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}
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/**
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* Runs when the user becomes active after a period of inactivity
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* Runs when the user becomes active after a period of inactivity.
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*
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* @access private
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*
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* @return void
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* @since 3.6.0
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*
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* @returns {void}
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*/
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function userIsActive() {
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settings.userActivityEvents = false;
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@ -510,16 +560,17 @@
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}
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/**
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* Check for user activity
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* Checks for user activity.
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*
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* Runs every 30 sec.
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* Sets 'hasFocus = true' if user is active and the window is in the background.
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* Set 'hasFocus = false' if the user has been inactive (no mouse or keyboard activity)
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* for 5 min. even when the window has focus.
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* Runs every 30 sec. Sets 'hasFocus = true' if user is active and the window is
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* in the background. Sets 'hasFocus = false' if the user has been inactive
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* (no mouse or keyboard activity) for 5 min. even when the window has focus.
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*
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* @access private
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*
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* @return void
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* @since 3.8.0
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*
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* @returns {void}
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*/
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function checkUserActivity() {
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var lastActive = settings.userActivity ? time() - settings.userActivity : 0;
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@ -552,33 +603,45 @@
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}
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}
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// Public methods
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// Public methods.
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/**
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* Whether the window (or any local iframe in it) has focus, or the user is active
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* Checks whether the window (or any local iframe in it) has focus, or the user
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* is active.
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*
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* @return bool
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* @since 3.6.0
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* @memberOf wp.heartbeat.prototype
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*
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* @returns {boolean} True if the window or the user is active.
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*/
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function hasFocus() {
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return settings.hasFocus;
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}
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/**
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* Whether there is a connection error
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* Checks whether there is a connection error.
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*
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* @return bool
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* @since 3.6.0
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*
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* @memberOf wp.heartbeat.prototype
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*
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* @returns {boolean} True if a connection error was found.
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*/
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function hasConnectionError() {
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return settings.connectionError;
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}
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/**
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* Connect asap regardless of 'hasFocus'
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* Connects as soon as possible regardless of 'hasFocus' state.
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*
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* Will not open two concurrent connections. If a connection is in progress,
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* will connect again immediately after the current connection completes.
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*
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* @return void
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* @since 3.8.0
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*
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* @memberOf wp.heartbeat.prototype
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*
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* @returns {void}
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*/
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function connectNow() {
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settings.lastTick = 0;
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|
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@ -586,28 +649,41 @@
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}
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/**
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* Disable suspending
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* Disables suspending.
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*
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* Should be used only when Heartbeat is performing critical tasks like autosave, post-locking, etc.
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* Using this on many screens may overload the user's hosting account if several
|
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* browser windows/tabs are left open for a long time.
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* Should be used only when Heartbeat is performing critical tasks like
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* autosave, post-locking, etc. Using this on many screens may overload the
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* user's hosting account if several browser windows/tabs are left open for a
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* long time.
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*
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* @return void
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||||
* @since 3.8.0
|
||||
*
|
||||
* @memberOf wp.heartbeat.prototype
|
||||
*
|
||||
* @returns {void}
|
||||
*/
|
||||
function disableSuspend() {
|
||||
settings.suspendEnabled = false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get/Set the interval
|
||||
* Gets/Sets the interval.
|
||||
*
|
||||
* When setting to 'fast' or 5, by default interval is 5 sec. for the next 30 ticks (for 2 min and 30 sec).
|
||||
* In this case the number of 'ticks' can be passed as second argument.
|
||||
* If the window doesn't have focus, the interval slows down to 2 min.
|
||||
* When setting to 'fast' or 5, the interval is 5 seconds for the next 30 ticks
|
||||
* (for 2 minutes and 30 seconds) by default. In this case the number of 'ticks'
|
||||
* can be passed as second argument. If the window doesn't have focus, the
|
||||
* interval slows down to 2 min.
|
||||
*
|
||||
* @param mixed speed Interval: 'fast' or 5, 15, 30, 60, 120
|
||||
* @param string ticks Used with speed = 'fast' or 5, how many ticks before the interval reverts back
|
||||
* @return int Current interval in seconds
|
||||
* @since 3.6.0
|
||||
*
|
||||
* @memberOf wp.heartbeat.prototype
|
||||
*
|
||||
* @param {string|number} speed Interval: 'fast' or 5, 15, 30, 60, 120. Fast
|
||||
* equals 5.
|
||||
* @param {string} ticks Tells how many ticks before the interval reverts
|
||||
* back. Used with speed = 'fast' or 5.
|
||||
*
|
||||
* @returns {number} Current interval in seconds.
|
||||
*/
|
||||
function interval( speed, ticks ) {
|
||||
var newInterval,
|
||||
|
|
@ -667,20 +743,28 @@
|
|||
}
|
||||
|
||||
/**
|
||||
* Enqueue data to send with the next XHR
|
||||
* Enqueues data to send with the next XHR.
|
||||
*
|
||||
* As the data is send asynchronously, this function doesn't return the XHR response.
|
||||
* To see the response, use the custom jQuery event 'heartbeat-tick' on the document, example:
|
||||
* As the data is send asynchronously, this function doesn't return the XHR
|
||||
* response. To see the response, use the custom jQuery event 'heartbeat-tick'
|
||||
* on the document, example:
|
||||
* $(document).on( 'heartbeat-tick.myname', function( event, data, textStatus, jqXHR ) {
|
||||
* // code
|
||||
* });
|
||||
* If the same 'handle' is used more than once, the data is not overwritten when the third argument is 'true'.
|
||||
* Use wp.heartbeat.isQueued('handle') to see if any data is already queued for that handle.
|
||||
* If the same 'handle' is used more than once, the data is not overwritten when
|
||||
* the third argument is 'true'. Use `wp.heartbeat.isQueued('handle')` to see if
|
||||
* any data is already queued for that handle.
|
||||
*
|
||||
* $param string handle Unique handle for the data. The handle is used in PHP to receive the data.
|
||||
* $param mixed data The data to send.
|
||||
* $param bool noOverwrite Whether to overwrite existing data in the queue.
|
||||
* $return bool Whether the data was queued or not.
|
||||
* @since 3.6.0
|
||||
*
|
||||
* @memberOf wp.heartbeat.prototype
|
||||
*
|
||||
* @param {string} handle Unique handle for the data, used in PHP to
|
||||
* receive the data.
|
||||
* @param {*} data The data to send.
|
||||
* @param {boolean} noOverwrite Whether to overwrite existing data in the queue.
|
||||
*
|
||||
* @returns {boolean} True if the data was queued.
|
||||
*/
|
||||
function enqueue( handle, data, noOverwrite ) {
|
||||
if ( handle ) {
|
||||
|
|
@ -695,10 +779,13 @@
|
|||
}
|
||||
|
||||
/**
|
||||
* Check if data with a particular handle is queued
|
||||
* Checks if data with a particular handle is queued.
|
||||
*
|
||||
* $param string handle The handle for the data
|
||||
* $return bool Whether some data is queued with this handle
|
||||
* @since 3.6.0
|
||||
*
|
||||
* @param {string} handle The handle for the data.
|
||||
*
|
||||
* @returns {boolean} True if the data is queued with this handle.
|
||||
*/
|
||||
function isQueued( handle ) {
|
||||
if ( handle ) {
|
||||
|
|
@ -707,10 +794,15 @@
|
|||
}
|
||||
|
||||
/**
|
||||
* Remove data with a particular handle from the queue
|
||||
* Removes data with a particular handle from the queue.
|
||||
*
|
||||
* $param string handle The handle for the data
|
||||
* $return void
|
||||
* @since 3.7.0
|
||||
*
|
||||
* @memberOf wp.heartbeat.prototype
|
||||
*
|
||||
* @param {string} handle The handle for the data.
|
||||
*
|
||||
* @returns {void}
|
||||
*/
|
||||
function dequeue( handle ) {
|
||||
if ( handle ) {
|
||||
|
|
@ -719,10 +811,15 @@
|
|||
}
|
||||
|
||||
/**
|
||||
* Get data that was enqueued with a particular handle
|
||||
* Gets data that was enqueued with a particular handle.
|
||||
*
|
||||
* $param string handle The handle for the data
|
||||
* $return mixed The data or undefined
|
||||
* @since 3.7.0
|
||||
*
|
||||
* @memberOf wp.heartbeat.prototype
|
||||
*
|
||||
* @param {string} handle The handle for the data.
|
||||
*
|
||||
* @returns {*} The data or undefined.
|
||||
*/
|
||||
function getQueuedItem( handle ) {
|
||||
if ( handle ) {
|
||||
|
|
@ -732,7 +829,7 @@
|
|||
|
||||
initialize();
|
||||
|
||||
// Expose public methods
|
||||
// Expose public methods.
|
||||
return {
|
||||
hasFocus: hasFocus,
|
||||
connectNow: connectNow,
|
||||
|
|
@ -752,6 +849,13 @@
|
|||
* @namespace wp
|
||||
*/
|
||||
window.wp = window.wp || {};
|
||||
|
||||
/**
|
||||
* Contains the Heartbeat API.
|
||||
*
|
||||
* @namespace wp.heartbeat
|
||||
* @type {Heartbeat}
|
||||
*/
|
||||
window.wp.heartbeat = new Heartbeat();
|
||||
|
||||
}( jQuery, window ));
|
||||
|
|
|
|||
Loading…
Reference in New Issue