/**
* Heartbeat API
*
- * Note: this API is "experimental" meaning it will likely change a lot
- * in the next few releases based on feedback from 3.6.0. If you intend
- * to use it, please follow the development closely.
- *
* Heartbeat is a simple server polling API that sends XHR requests to
- * the server every 15 seconds and triggers events (or callbacks) upon
+ * the server every 15 - 60 seconds and triggers events (or callbacks) upon
* receiving data. Currently these 'ticks' handle transports for post locking,
- * login-expiration warnings, and related tasks while a user is logged in.
+ * login-expiration warnings, autosave, and related tasks while a user is logged in.
*
- * Available filters in ajax-actions.php:
+ * Available PHP filters (in ajax-actions.php):
* - heartbeat_received
* - heartbeat_send
* - heartbeat_tick
* - heartbeat_nopriv_tick
* @see wp_ajax_nopriv_heartbeat(), wp_ajax_heartbeat()
*
+ * Custom jQuery events:
+ * - heartbeat-send
+ * - heartbeat-tick
+ * - heartbeat-error
+ * - heartbeat-connection-lost
+ * - heartbeat-connection-restored
+ * - heartbeat-nonces-expired
+ *
* @since 3.6.0
*/
- // Ensure the global `wp` object exists.
-window.wp = window.wp || {};
-
-(function($){
+( function( $, window, undefined ) {
var Heartbeat = function() {
- var self = this,
- running,
- beat,
- screenId = typeof pagenow != 'undefined' ? pagenow : '',
- url = typeof ajaxurl != 'undefined' ? ajaxurl : '',
- settings,
- tick = 0,
- queue = {},
- interval,
- connecting,
- countdown = 0,
- errorcount = 0,
- tempInterval,
- hasFocus = true,
- isUserActive,
- userActiveEvents,
- winBlurTimeout,
- frameBlurTimeout = -1,
- hasConnectionError = false;
+ var $document = $(document),
+ settings = {
+ // Suspend/resume
+ suspend: false,
+
+ // Whether suspending is enabled
+ suspendEnabled: true,
+
+ // Current screen id, defaults to the JS global 'pagenow' when present (in the admin) or 'front'
+ screenId: '',
+
+ // XHR request URL, defaults to the JS global 'ajaxurl' when present
+ url: '',
+
+ // Timestamp, start of the last connection request
+ lastTick: 0,
+
+ // Container for the enqueued items
+ queue: {},
+
+ // Connect interval (in seconds)
+ mainInterval: 60,
+
+ // Used when the interval is set to 5 sec. temporarily
+ tempInterval: 0,
+
+ // Used when the interval is reset
+ originalInterval: 0,
+
+ // Used to limit the number of AJAX requests.
+ minimalInterval: 0,
+
+ // Used together with tempInterval
+ countdown: 0,
+
+ // Whether a connection is currently in progress
+ connecting: false,
+
+ // Whether a connection error occurred
+ connectionError: false,
+
+ // Used to track non-critical errors
+ errorcount: 0,
+
+ // Whether at least one connection has completed successfully
+ hasConnected: false,
+
+ // Whether the current browser window is in focus and the user is active
+ hasFocus: true,
+
+ // Timestamp, last time the user was active. Checked every 30 sec.
+ userActivity: 0,
+
+ // Flags whether events tracking user activity were set
+ userActivityEvents: false,
+
+ checkFocusTimer: 0,
+ beatTimer: 0
+ };
/**
- * Returns a boolean that's indicative of whether or not there is a connection error
+ * Set local vars and events, then start
*
- * @returns boolean
+ * @access private
+ *
+ * @return void
*/
- this.hasConnectionError = function() {
- return hasConnectionError;
- };
+ function initialize() {
+ var options, hidden, visibilityState, visibilitychange;
- if ( typeof( window.heartbeatSettings ) == 'object' ) {
- settings = $.extend( {}, window.heartbeatSettings );
+ if ( typeof window.pagenow === 'string' ) {
+ settings.screenId = window.pagenow;
+ }
- // Add private vars
- url = settings.ajaxurl || url;
- delete settings.ajaxurl;
- delete settings.nonce;
+ if ( typeof window.ajaxurl === 'string' ) {
+ settings.url = window.ajaxurl;
+ }
- interval = settings.interval || 15; // default interval
- delete settings.interval;
- // The interval can be from 15 to 60 sec. and can be set temporarily to 5 sec.
- if ( interval < 15 )
- interval = 15;
- else if ( interval > 60 )
- interval = 60;
+ // Pull in options passed from PHP
+ if ( typeof window.heartbeatSettings === 'object' ) {
+ options = window.heartbeatSettings;
- interval = interval * 1000;
+ // The XHR URL can be passed as option when window.ajaxurl is not set
+ if ( ! settings.url && options.ajaxurl ) {
+ settings.url = options.ajaxurl;
+ }
- // 'screenId' can be added from settings on the front-end where the JS global 'pagenow' is not set
- screenId = screenId || settings.screenId || 'front';
- delete settings.screenId;
+ // The interval can be from 15 to 120 sec. and can be set temporarily to 5 sec.
+ // It can be set in the initial options or changed later from JS and/or from PHP.
+ if ( options.interval ) {
+ settings.mainInterval = options.interval;
- // Add or overwrite public vars
- $.extend( this, settings );
- }
+ if ( settings.mainInterval < 15 ) {
+ settings.mainInterval = 15;
+ } else if ( settings.mainInterval > 120 ) {
+ settings.mainInterval = 120;
+ }
+ }
+
+ // Used to limit the number of AJAX requests. Overrides all other intervals if they are shorter.
+ // Needed for some hosts that cannot handle frequent requests and the user may exceed the allocated server CPU time, etc.
+ // The minimal interval can be up to 600 sec. however setting it to longer than 120 sec. will limit or disable
+ // some of the functionality (like post locks).
+ // Once set at initialization, minimalInterval cannot be changed/overriden.
+ if ( options.minimalInterval ) {
+ options.minimalInterval = parseInt( options.minimalInterval, 10 );
+ settings.minimalInterval = options.minimalInterval > 0 && options.minimalInterval <= 600 ? options.minimalInterval * 1000 : 0;
+ }
+
+ if ( settings.minimalInterval && settings.mainInterval < settings.minimalInterval ) {
+ settings.mainInterval = settings.minimalInterval;
+ }
+
+ // 'screenId' can be added from settings on the front-end where the JS global 'pagenow' is not set
+ if ( ! settings.screenId ) {
+ settings.screenId = options.screenId || 'front';
+ }
- function time(s) {
- if ( s )
- return parseInt( (new Date()).getTime() / 1000 );
+ if ( options.suspension === 'disable' ) {
+ settings.suspendEnabled = false;
+ }
+ }
+
+ // Convert to milliseconds
+ settings.mainInterval = settings.mainInterval * 1000;
+ settings.originalInterval = settings.mainInterval;
+
+ // Switch the interval to 120 sec. by using the Page Visibility API.
+ // If the browser doesn't support it (Safari < 7, Android < 4.4, IE < 10), the interval
+ // will be increased to 120 sec. after 5 min. of mouse and keyboard inactivity.
+ if ( typeof document.hidden !== 'undefined' ) {
+ hidden = 'hidden';
+ visibilitychange = 'visibilitychange';
+ visibilityState = 'visibilityState';
+ } else if ( typeof document.msHidden !== 'undefined' ) { // IE10
+ hidden = 'msHidden';
+ visibilitychange = 'msvisibilitychange';
+ visibilityState = 'msVisibilityState';
+ } else if ( typeof document.webkitHidden !== 'undefined' ) { // Android
+ hidden = 'webkitHidden';
+ visibilitychange = 'webkitvisibilitychange';
+ visibilityState = 'webkitVisibilityState';
+ }
+ if ( hidden ) {
+ if ( document[hidden] ) {
+ settings.hasFocus = false;
+ }
+
+ $document.on( visibilitychange + '.wp-heartbeat', function() {
+ if ( document[visibilityState] === 'hidden' ) {
+ blurred();
+ window.clearInterval( settings.checkFocusTimer );
+ } else {
+ focused();
+ if ( document.hasFocus ) {
+ settings.checkFocusTimer = window.setInterval( checkFocus, 10000 );
+ }
+ }
+ });
+ }
+
+ // Use document.hasFocus() if available.
+ if ( document.hasFocus ) {
+ settings.checkFocusTimer = window.setInterval( checkFocus, 10000 );
+ }
+
+ $(window).on( 'unload.wp-heartbeat', function() {
+ // Don't connect any more
+ settings.suspend = true;
+
+ // Abort the last request if not completed
+ if ( settings.xhr && settings.xhr.readyState !== 4 ) {
+ settings.xhr.abort();
+ }
+ });
+
+ // Check for user activity every 30 seconds.
+ window.setInterval( checkUserActivity, 30000 );
+
+ // Start one tick after DOM ready
+ $document.ready( function() {
+ settings.lastTick = time();
+ scheduleNextTick();
+ });
+ }
+
+ /**
+ * Return the current time according to the browser
+ *
+ * @access private
+ *
+ * @return int
+ */
+ function time() {
return (new Date()).getTime();
}
+ /**
+ * Check if the iframe is from the same origin
+ *
+ * @access private
+ *
+ * @return bool
+ */
function isLocalFrame( frame ) {
var origin, src = frame.src;
+ // Need to compare strings as WebKit doesn't throw JS errors when iframes have different origin.
+ // It throws uncatchable exceptions.
if ( src && /^https?:\/\//.test( src ) ) {
origin = window.location.origin ? window.location.origin : window.location.protocol + '//' + window.location.host;
- if ( src.indexOf( origin ) !== 0 )
+ if ( src.indexOf( origin ) !== 0 ) {
return false;
+ }
}
try {
- if ( frame.contentWindow.document )
+ if ( frame.contentWindow.document ) {
return true;
+ }
} catch(e) {}
return false;
}
- // Set error state and fire an event on XHR errors or timeout
- function errorstate( error ) {
+ /**
+ * Check if the document's focus has changed
+ *
+ * @access private
+ *
+ * @return void
+ */
+ function checkFocus() {
+ if ( settings.hasFocus && ! document.hasFocus() ) {
+ blurred();
+ } else if ( ! settings.hasFocus && document.hasFocus() ) {
+ focused();
+ }
+ }
+
+ /**
+ * Set error state and fire an event on XHR errors or timeout
+ *
+ * @access private
+ *
+ * @param string error The error type passed from the XHR
+ * @param int status The HTTP status code passed from jqXHR (200, 404, 500, etc.)
+ * @return void
+ */
+ function setErrorState( error, status ) {
var trigger;
if ( error ) {
// no response for 30 sec.
trigger = true;
break;
- case 'parsererror':
case 'error':
+ if ( 503 === status && settings.hasConnected ) {
+ trigger = true;
+ break;
+ }
+ /* falls through */
+ case 'parsererror':
case 'empty':
case 'unknown':
- errorcount++;
+ settings.errorcount++;
- if ( errorcount > 2 )
+ if ( settings.errorcount > 2 && settings.hasConnected ) {
trigger = true;
+ }
break;
}
- if ( trigger && ! self.hasConnectionError() ) {
- hasConnectionError = true;
- $(document).trigger( 'heartbeat-connection-lost', [error] );
+ if ( trigger && ! hasConnectionError() ) {
+ settings.connectionError = true;
+ $document.trigger( 'heartbeat-connection-lost', [error, status] );
}
- } else if ( self.hasConnectionError() ) {
- errorcount = 0;
- hasConnectionError = false;
- $(document).trigger( 'heartbeat-connection-restored' );
}
}
- function connect() {
- var send = {}, data, i, empty = true,
- nonce = typeof window.heartbeatSettings == 'object' ? window.heartbeatSettings.nonce : '';
- tick = time();
-
- data = $.extend( {}, queue );
- // Clear the data queue, anything added after this point will be send on the next tick
- queue = {};
-
- $(document).trigger( 'heartbeat-send', [data] );
-
- for ( i in data ) {
- if ( data.hasOwnProperty( i ) ) {
- empty = false;
- break;
- }
+ /**
+ * Clear the error state and fire an event
+ *
+ * @access private
+ *
+ * @return void
+ */
+ function clearErrorState() {
+ // Has connected successfully
+ settings.hasConnected = true;
+
+ if ( hasConnectionError() ) {
+ settings.errorcount = 0;
+ settings.connectionError = false;
+ $document.trigger( 'heartbeat-connection-restored' );
}
+ }
- // If nothing to send (nothing is expecting a response),
- // schedule the next tick and bail
- if ( empty && ! self.hasConnectionError() ) {
- connecting = false;
- next();
+ /**
+ * Gather the data and connect to the server
+ *
+ * @access private
+ *
+ * @return void
+ */
+ function connect() {
+ var ajaxData, heartbeatData;
+
+ // If the connection to the server is slower than the interval,
+ // heartbeat connects as soon as the previous connection's response is received.
+ if ( settings.connecting || settings.suspend ) {
return;
}
- send.data = data;
- send.interval = interval / 1000;
- send._nonce = nonce;
- send.action = 'heartbeat';
- send.screen_id = screenId;
- send.has_focus = hasFocus;
+ settings.lastTick = time();
- connecting = true;
- self.xhr = $.ajax({
- url: url,
+ heartbeatData = $.extend( {}, settings.queue );
+ // Clear the data queue, anything added after this point will be send on the next tick
+ settings.queue = {};
+
+ $document.trigger( 'heartbeat-send', [ heartbeatData ] );
+
+ ajaxData = {
+ data: heartbeatData,
+ interval: settings.tempInterval ? settings.tempInterval / 1000 : settings.mainInterval / 1000,
+ _nonce: typeof window.heartbeatSettings === 'object' ? window.heartbeatSettings.nonce : '',
+ action: 'heartbeat',
+ screen_id: settings.screenId,
+ has_focus: settings.hasFocus
+ };
+
+ settings.connecting = true;
+ settings.xhr = $.ajax({
+ url: settings.url,
type: 'post',
timeout: 30000, // throw an error if not completed after 30 sec.
- data: send,
+ data: ajaxData,
dataType: 'json'
+ }).always( function() {
+ settings.connecting = false;
+ scheduleNextTick();
}).done( function( response, textStatus, jqXHR ) {
- var new_interval;
+ var newInterval;
- if ( ! response )
- return errorstate( 'empty' );
+ if ( ! response ) {
+ setErrorState( 'empty' );
+ return;
+ }
- // Clear error state
- if ( self.hasConnectionError() )
- errorstate();
+ clearErrorState();
if ( response.nonces_expired ) {
- $(document).trigger( 'heartbeat-nonces-expired' );
+ $document.trigger( 'heartbeat-nonces-expired' );
return;
}
// Change the interval from PHP
if ( response.heartbeat_interval ) {
- new_interval = response.heartbeat_interval;
+ newInterval = response.heartbeat_interval;
delete response.heartbeat_interval;
}
- self.tick( response, textStatus, jqXHR );
+ $document.trigger( 'heartbeat-tick', [response, textStatus, jqXHR] );
- // do this last, can trigger the next XHR if connection time > 5 sec. and new_interval == 'fast'
- if ( new_interval )
- self.interval.call( self, new_interval );
- }).always( function() {
- connecting = false;
- next();
+ // Do this last, can trigger the next XHR if connection time > 5 sec. and newInterval == 'fast'
+ if ( newInterval ) {
+ interval( newInterval );
+ }
}).fail( function( jqXHR, textStatus, error ) {
- errorstate( textStatus || 'unknown' );
- self.error( jqXHR, textStatus, error );
+ setErrorState( textStatus || 'unknown', jqXHR.status );
+ $document.trigger( 'heartbeat-error', [jqXHR, textStatus, error] );
});
}
- function next() {
- var delta = time() - tick, t = interval;
+ /**
+ * Schedule the next connection
+ *
+ * Fires immediately if the connection time is longer than the interval.
+ *
+ * @access private
+ *
+ * @return void
+ */
+ function scheduleNextTick() {
+ var delta = time() - settings.lastTick,
+ interval = settings.mainInterval;
- if ( ! running )
+ if ( settings.suspend ) {
return;
+ }
+
+ if ( ! settings.hasFocus ) {
+ interval = 120000; // 120 sec. Post locks expire after 150 sec.
+ } else if ( settings.countdown > 0 && settings.tempInterval ) {
+ interval = settings.tempInterval;
+ settings.countdown--;
- if ( ! hasFocus ) {
- t = 100000; // 100 sec. Post locks expire after 120 sec.
- } else if ( countdown > 0 && tempInterval ) {
- t = tempInterval;
- countdown--;
+ if ( settings.countdown < 1 ) {
+ settings.tempInterval = 0;
+ }
}
- window.clearTimeout(beat);
+ if ( settings.minimalInterval && interval < settings.minimalInterval ) {
+ interval = settings.minimalInterval;
+ }
+
+ window.clearTimeout( settings.beatTimer );
- if ( delta < t ) {
- beat = window.setTimeout(
- function(){
- if ( running )
- connect();
+ if ( delta < interval ) {
+ settings.beatTimer = window.setTimeout(
+ function() {
+ connect();
},
- t - delta
+ interval - delta
);
} else {
connect();
}
}
+ /**
+ * Set the internal state when the browser window becomes hidden or loses focus
+ *
+ * @access private
+ *
+ * @return void
+ */
function blurred() {
- window.clearTimeout(winBlurTimeout);
- window.clearTimeout(frameBlurTimeout);
- winBlurTimeout = frameBlurTimeout = 0;
-
- hasFocus = false;
+ settings.hasFocus = false;
}
+ /**
+ * Set the internal state when the browser window becomes visible or is in focus
+ *
+ * @access private
+ *
+ * @return void
+ */
function focused() {
- window.clearTimeout(winBlurTimeout);
- window.clearTimeout(frameBlurTimeout);
- winBlurTimeout = frameBlurTimeout = 0;
-
- isUserActive = time();
-
- if ( hasFocus )
- return;
+ settings.userActivity = time();
- hasFocus = true;
- window.clearTimeout(beat);
+ // Resume if suspended
+ settings.suspend = false;
- if ( ! connecting )
- next();
- }
-
- function setFrameEvents() {
- $('iframe').each( function( i, frame ){
- if ( ! isLocalFrame( frame ) )
- return;
-
- if ( $.data( frame, 'wp-heartbeat-focus' ) )
- return;
-
- $.data( frame, 'wp-heartbeat-focus', 1 );
-
- $( frame.contentWindow ).on( 'focus.wp-heartbeat-focus', function(e) {
- focused();
- }).on('blur.wp-heartbeat-focus', function(e) {
- setFrameEvents();
- frameBlurTimeout = window.setTimeout( function(){ blurred(); }, 500 );
- });
- });
+ if ( ! settings.hasFocus ) {
+ settings.hasFocus = true;
+ scheduleNextTick();
+ }
}
- $(window).on( 'blur.wp-heartbeat-focus', function(e) {
- setFrameEvents();
- winBlurTimeout = window.setTimeout( function(){ blurred(); }, 500 );
- }).on( 'focus.wp-heartbeat-focus', function() {
- $('iframe').each( function( i, frame ) {
- if ( !isLocalFrame( frame ) )
- return;
-
- $.removeData( frame, 'wp-heartbeat-focus' );
- $( frame.contentWindow ).off( '.wp-heartbeat-focus' );
- });
-
- focused();
- });
-
+ /**
+ * Runs when the user becomes active after a period of inactivity
+ *
+ * @access private
+ *
+ * @return void
+ */
function userIsActive() {
- userActiveEvents = false;
- $(document).off( '.wp-heartbeat-active' );
- $('iframe').each( function( i, frame ) {
- if ( ! isLocalFrame( frame ) )
- return;
+ settings.userActivityEvents = false;
+ $document.off( '.wp-heartbeat-active' );
- $( frame.contentWindow ).off( '.wp-heartbeat-active' );
+ $('iframe').each( function( i, frame ) {
+ if ( isLocalFrame( frame ) ) {
+ $( frame.contentWindow ).off( '.wp-heartbeat-active' );
+ }
});
focused();
}
- // Set 'hasFocus = true' if user is active and the window is in the background.
- // Set 'hasFocus = false' if the user has been inactive (no mouse or keyboard activity) for 5 min. even when the window has focus.
- function checkUserActive() {
- var lastActive = isUserActive ? time() - isUserActive : 0;
+ /**
+ * Check for user activity
+ *
+ * Runs every 30 sec.
+ * Sets 'hasFocus = true' if user is active and the window is in the background.
+ * Set 'hasFocus = false' if the user has been inactive (no mouse or keyboard activity)
+ * for 5 min. even when the window has focus.
+ *
+ * @access private
+ *
+ * @return void
+ */
+ function checkUserActivity() {
+ var lastActive = settings.userActivity ? time() - settings.userActivity : 0;
- // Throttle down when no mouse or keyboard activity for 5 min
- if ( lastActive > 300000 && hasFocus )
- blurred();
+ // Throttle down when no mouse or keyboard activity for 5 min.
+ if ( lastActive > 300000 && settings.hasFocus ) {
+ blurred();
+ }
- if ( ! userActiveEvents ) {
- $(document).on( 'mouseover.wp-heartbeat-active keyup.wp-heartbeat-active', function(){ userIsActive(); } );
+ // Suspend after 10 min. of inactivity when suspending is enabled.
+ // Always suspend after 60 min. of inactivity. This will release the post lock, etc.
+ if ( ( settings.suspendEnabled && lastActive > 600000 ) || lastActive > 3600000 ) {
+ settings.suspend = true;
+ }
- $('iframe').each( function( i, frame ) {
- if ( ! isLocalFrame( frame ) )
- return;
+ if ( ! settings.userActivityEvents ) {
+ $document.on( 'mouseover.wp-heartbeat-active keyup.wp-heartbeat-active touchend.wp-heartbeat-active', function() {
+ userIsActive();
+ });
- $( frame.contentWindow ).on( 'mouseover.wp-heartbeat-active keyup.wp-heartbeat-active', function(){ userIsActive(); } );
+ $('iframe').each( function( i, frame ) {
+ if ( isLocalFrame( frame ) ) {
+ $( frame.contentWindow ).on( 'mouseover.wp-heartbeat-active keyup.wp-heartbeat-active touchend.wp-heartbeat-active', function() {
+ userIsActive();
+ });
+ }
});
- userActiveEvents = true;
+ settings.userActivityEvents = true;
}
}
- // Check for user activity every 30 seconds.
- window.setInterval( function(){ checkUserActive(); }, 30000 );
- $(document).ready( function() {
- // Start one tick (15 sec) after DOM ready
- running = true;
- tick = time();
- next();
- });
-
- this.hasFocus = function() {
- return hasFocus;
- };
+ // Public methods
+
+ /**
+ * Whether the window (or any local iframe in it) has focus, or the user is active
+ *
+ * @return bool
+ */
+ function hasFocus() {
+ return settings.hasFocus;
+ }
+
+ /**
+ * Whether there is a connection error
+ *
+ * @return bool
+ */
+ function hasConnectionError() {
+ return settings.connectionError;
+ }
+
+ /**
+ * Connect asap regardless of 'hasFocus'
+ *
+ * Will not open two concurrent connections. If a connection is in progress,
+ * will connect again immediately after the current connection completes.
+ *
+ * @return void
+ */
+ function connectNow() {
+ settings.lastTick = 0;
+ scheduleNextTick();
+ }
+
+ /**
+ * Disable suspending
+ *
+ * Should be used only when Heartbeat is performing critical tasks like autosave, post-locking, etc.
+ * Using this on many screens may overload the user's hosting account if several
+ * browser windows/tabs are left open for a long time.
+ *
+ * @return void
+ */
+ function disableSuspend() {
+ settings.suspendEnabled = false;
+ }
/**
* Get/Set the interval
*
- * When setting to 'fast', the interval is 5 sec. for the next 30 ticks (for 2 min and 30 sec).
+ * 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.
*
- * @param string speed Interval speed: 'fast' (5sec), 'standard' (15sec) default, 'slow' (60sec)
- * @param string ticks Used with speed = 'fast', how many ticks before the speed reverts back
+ * @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
*/
- this.interval = function( speed, ticks ) {
- var reset, seconds;
- ticks = parseInt( ticks, 10 ) || 30;
- ticks = ticks < 1 || ticks > 30 ? 30 : ticks;
+ function interval( speed, ticks ) {
+ var newInterval,
+ oldInterval = settings.tempInterval ? settings.tempInterval : settings.mainInterval;
if ( speed ) {
switch ( speed ) {
case 'fast':
- seconds = 5;
- countdown = ticks;
+ case 5:
+ newInterval = 5000;
+ break;
+ case 15:
+ newInterval = 15000;
+ break;
+ case 30:
+ newInterval = 30000;
+ break;
+ case 60:
+ newInterval = 60000;
break;
- case 'slow':
- seconds = 60;
- countdown = 0;
+ case 120:
+ newInterval = 120000;
break;
case 'long-polling':
// Allow long polling, (experimental)
- interval = 0;
+ settings.mainInterval = 0;
return 0;
- break;
default:
- seconds = 15;
- countdown = 0;
+ newInterval = settings.originalInterval;
+ }
+
+ if ( settings.minimalInterval && newInterval < settings.minimalInterval ) {
+ newInterval = settings.minimalInterval;
}
- // Reset when the new interval value is lower than the current one
- reset = seconds * 1000 < interval;
+ if ( 5000 === newInterval ) {
+ ticks = parseInt( ticks, 10 ) || 30;
+ ticks = ticks < 1 || ticks > 30 ? 30 : ticks;
- if ( countdown > 0 ) {
- tempInterval = seconds * 1000;
+ settings.countdown = ticks;
+ settings.tempInterval = newInterval;
} else {
- interval = seconds * 1000;
- tempInterval = 0;
+ settings.countdown = 0;
+ settings.tempInterval = 0;
+ settings.mainInterval = newInterval;
}
- if ( reset )
- next();
+ // Change the next connection time if new interval has been set.
+ // Will connect immediately if the time since the last connection
+ // is greater than the new interval.
+ if ( newInterval !== oldInterval ) {
+ scheduleNextTick();
+ }
}
- if ( ! hasFocus )
- return 120;
-
- return tempInterval ? tempInterval / 1000 : interval / 1000;
- };
+ return settings.tempInterval ? settings.tempInterval / 1000 : settings.mainInterval / 1000;
+ }
/**
* Enqueue data to send with the next XHR
*
- * As the data is sent later, this function doesn't return the XHR response.
+ * 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
*
* $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 dont_overwrite Whether to overwrite existing data in the queue.
+ * $param bool noOverwrite Whether to overwrite existing data in the queue.
* $return bool Whether the data was queued or not.
*/
- this.enqueue = function( handle, data, dont_overwrite ) {
+ function enqueue( handle, data, noOverwrite ) {
if ( handle ) {
- if ( queue.hasOwnProperty( handle ) && dont_overwrite )
+ if ( noOverwrite && this.isQueued( handle ) ) {
return false;
+ }
- queue[handle] = data;
+ settings.queue[handle] = data;
return true;
}
return false;
- };
+ }
/**
* Check if data with a particular handle is queued
*
* $param string handle The handle for the data
- * $return mixed The data queued with that handle or null
+ * $return bool Whether some data is queued with this handle
*/
- this.isQueued = function( handle ) {
- return queue[handle];
- };
- };
+ function isQueued( handle ) {
+ if ( handle ) {
+ return settings.queue.hasOwnProperty( handle );
+ }
+ }
+
+ /**
+ * Remove data with a particular handle from the queue
+ *
+ * $param string handle The handle for the data
+ * $return void
+ */
+ function dequeue( handle ) {
+ if ( handle ) {
+ delete settings.queue[handle];
+ }
+ }
- $.extend( Heartbeat.prototype, {
- tick: function( data, textStatus, jqXHR ) {
- $(document).trigger( 'heartbeat-tick', [data, textStatus, jqXHR] );
- },
- error: function( jqXHR, textStatus, error ) {
- $(document).trigger( 'heartbeat-error', [jqXHR, textStatus, error] );
+ /**
+ * Get data that was enqueued with a particular handle
+ *
+ * $param string handle The handle for the data
+ * $return mixed The data or undefined
+ */
+ function getQueuedItem( handle ) {
+ if ( handle ) {
+ return this.isQueued( handle ) ? settings.queue[handle] : undefined;
+ }
}
- });
- wp.heartbeat = new Heartbeat();
+ initialize();
+
+ // Expose public methods
+ return {
+ hasFocus: hasFocus,
+ connectNow: connectNow,
+ disableSuspend: disableSuspend,
+ interval: interval,
+ hasConnectionError: hasConnectionError,
+ enqueue: enqueue,
+ dequeue: dequeue,
+ isQueued: isQueued,
+ getQueuedItem: getQueuedItem
+ };
+ };
+
+ // Ensure the global `wp` object exists.
+ window.wp = window.wp || {};
+ window.wp.heartbeat = new Heartbeat();
-}(jQuery));
+}( jQuery, window ));
scripts.mit.edu / autoinstalls / wordpress.git / blobdiff