/**
* @output wp-admin/js/customize-controls.js
*/

/* global _wpCustomizeHeader, _wpCustomizeBackground, _wpMediaViewsL10n, MediaElementPlayer, console, confirm */
(function( exports, $ ){
var Container, focus, normalizedTransitionendEventName, api = wp.customize;

var reducedMotionMediaQuery = window.matchMedia( '(prefers-reduced-motion: reduce)' );
var isReducedMotion = reducedMotionMediaQuery.matches;
reducedMotionMediaQuery.addEventListener( 'change' , function handleReducedMotionChange( event ) {
isReducedMotion = event.matches;
});

api.OverlayNotification = api.Notification.extend(/** @lends wp.customize.OverlayNotification.prototype */{

/**
* Whether the notification should show a loading spinner.
*
* @since 4.9.0
* @var {boolean}
*/
loading: false,

/**
* A notification that is displayed in a full-screen overlay.
*
* @constructs wp.customize.OverlayNotification
* @augments wp.customize.Notification
*
* @since 4.9.0
*
* @param {string} code - Code.
* @param {Object} params - Params.
*/
initialize: function( code, params ) {
var notification = this;
api.Notification.prototype.initialize.call( notification, code, params );
notification.containerClasses += ' notification-overlay';
if ( notification.loading ) {
notification.containerClasses += ' notification-loading';
}
},

/**
* Render notification.
*
* @since 4.9.0
*
* @return {jQuery} Notification container.
*/
render: function() {
var li = api.Notification.prototype.render.call( this );
li.on( 'keydown', _.bind( this.handleEscape, this ) );
return li;
},

/**
* Stop propagation on escape key presses, but also dismiss notification if it is dismissible.
*
* @since 4.9.0
*
* @param {jQuery.Event} event - Event.
* @return {void}
*/
handleEscape: function( event ) {
var notification = this;
if ( 27 === event.which ) {
event.stopPropagation();
if ( notification.dismissible && notification.parent ) {
notification.parent.remove( notification.code );
}
}
}
});

api.Notifications = api.Values.extend(/** @lends wp.customize.Notifications.prototype */{

/**
* Whether the alternative style should be used.
*
* @since 4.9.0
* @type {boolean}
*/
alt: false,

/**
* The default constructor for items of the collection.
*
* @since 4.9.0
* @type {object}
*/
defaultConstructor: api.Notification,

/**
* A collection of observable notifications.
*
* @since 4.9.0
*
* @constructs wp.customize.Notifications
* @augments wp.customize.Values
*
* @param {Object} options - Options.
* @param {jQuery} [options.container] - Container element for notifications. This can be injected later.
* @param {boolean} [options.alt] - Whether alternative style should be used when rendering notifications.
*
* @return {void}
*/
initialize: function( options ) {
var collection = this;

api.Values.prototype.initialize.call( collection, options );

_.bindAll( collection, 'constrainFocus' );

// Keep track of the order in which the notifications were added for sorting purposes.
collection._addedIncrement = 0;
collection._addedOrder = {};

// Trigger change event when notification is added or removed.
collection.bind( 'add', function( notification ) {
collection.trigger( 'change', notification );
});
collection.bind( 'removed', function( notification ) {
collection.trigger( 'change', notification );
});
},

/**
* Get the number of notifications added.
*
* @since 4.9.0
* @return {number} Count of notifications.
*/
count: function() {
return _.size( this._value );
},

/**
* Add notification to the collection.
*
* @since 4.9.0
*
* @param {string|wp.customize.Notification} notification - Notification object to add. Alternatively code may be supplied, and in that case the second notificationObject argument must be supplied.
* @param {wp.customize.Notification} [notificationObject] - Notification to add when first argument is the code string.
* @return {wp.customize.Notification} Added notification (or existing instance if it was already added).
*/
add: function( notification, notificationObject ) {
var collection = this, code, instance;
if ( 'string' === typeof notification ) {
code = notification;
instance = notificationObject;
} else {
code = notification.code;
instance = notification;
}
if ( ! collection.has( code ) ) {
collection._addedIncrement += 1;
collection._addedOrder[ code ] = collection._addedIncrement;
}
return api.Values.prototype.add.call( collection, code, instance );
},

/**
* Add notification to the collection.
*
* @since 4.9.0
* @param {string} code - Notification code to remove.
* @return {api.Notification} Added instance (or existing instance if it was already added).
*/
remove: function( code ) {
var collection = this;
delete collection._addedOrder[ code ];
return api.Values.prototype.remove.call( this, code );
},

/**
* Get list of notifications.
*
* Notifications may be sorted by type followed by added time.
*
* @since 4.9.0
* @param {Object} args - Args.
* @param {boolean} [args.sort=false] - Whether to return the notifications sorted.
* @return {Array.<wp.customize.Notification>} Notifications.
*/
get: function( args ) {
var collection = this, notifications, errorTypePriorities, params;
notifications = _.values( collection._value );

params = _.extend(
{ sort: false },
args
);

if ( params.sort ) {
errorTypePriorities = { error: 4, warning: 3, success: 2, info: 1 };
notifications.sort( function( a, b ) {
var aPriority = 0, bPriority = 0;
if ( ! _.isUndefined( errorTypePriorities[ a.type ] ) ) {
aPriority = errorTypePriorities[ a.type ];
}
if ( ! _.isUndefined( errorTypePriorities[ b.type ] ) ) {
bPriority = errorTypePriorities[ b.type ];
}
if ( aPriority !== bPriority ) {
return bPriority - aPriority; // Show errors first.
}
return collection._addedOrder[ b.code ] - collection._addedOrder[ a.code ]; // Show newer notifications higher.
});
}

return notifications;
},

/**
* Render notifications area.
*
* @since 4.9.0
* @return {void}
*/
render: function() {
var collection = this,
notifications, hadOverlayNotification = false, hasOverlayNotification, overlayNotifications = [],
previousNotificationsByCode = {},
listElement, focusableElements;

// Short-circuit if there are no container to render into.
if ( ! collection.container || ! collection.container.length ) {
return;
}

notifications = collection.get( { sort: true } );
collection.container.toggle( 0 !== notifications.length );

// Short-circuit if there are no changes to the notifications.
if ( collection.container.is( collection.previousContainer ) && _.isEqual( notifications, collection.previousNotifications ) ) {
return;
}

// Make sure list is part of the container.
listElement = collection.container.children( 'ul' ).first();
if ( ! listElement.length ) {
listElement = $( '<ul></ul>' );
collection.container.append( listElement );
}

// Remove all notifications prior to re-rendering.
listElement.find( '> [data-code]' ).remove();

_.each( collection.previousNotifications, function( notification ) {
previousNotificationsByCode[ notification.code ] = notification;
});

// Add all notifications in the sorted order.
_.each( notifications, function( notification ) {
var notificationContainer;
if ( wp.a11y && ( ! previousNotificationsByCode[ notification.code ] || ! _.isEqual( notification.message, previousNotificationsByCode[ notification.code ].message ) ) ) {
wp.a11y.speak( notification.message, 'assertive' );
}
notificationContainer = $( notification.render() );
notification.container = notificationContainer;
listElement.append( notificationContainer ); // @todo Consider slideDown() as enhancement.

if ( notification.extended( api.OverlayNotification ) ) {
overlayNotifications.push( notification );
}
});
hasOverlayNotification = Boolean( overlayNotifications.length );

if ( collection.previousNotifications ) {
hadOverlayNotification = Boolean( _.find( collection.previousNotifications, function( notification ) {
return notification.extended( api.OverlayNotification );
} ) );
}

if ( hasOverlayNotification !== hadOverlayNotification ) {
$( document.body ).toggleClass( 'customize-loading', hasOverlayNotification );
collection.container.toggleClass( 'has-overlay-notifications', hasOverlayNotification );
if ( hasOverlayNotification ) {
collection.previousActiveElement = document.activeElement;
$( document ).on( 'keydown', collection.constrainFocus );
} else {
$( document ).off( 'keydown', collection.constrainFocus );
}
}

if ( hasOverlayNotification ) {
collection.focusContainer = overlayNotifications[ overlayNotifications.length - 1 ].container;
collection.focusContainer.prop( 'tabIndex', -1 );
focusableElements = collection.focusContainer.find( ':focusable' );
if ( focusableElements.length ) {
focusableElements.first().focus();
} else {
collection.focusContainer.focus();
}
} else if ( collection.previousActiveElement ) {
$( collection.previousActiveElement ).trigger( 'focus' );
collection.previousActiveElement = null;
}

collection.previousNotifications = notifications;
collection.previousContainer = collection.container;
collection.trigger( 'rendered' );
},

/**
* Constrain focus on focus container.
*
* @since 4.9.0
*
* @param {jQuery.Event} event - Event.
* @return {void}
*/
constrainFocus: function constrainFocus( event ) {
var collection = this, focusableElements;

// Prevent keys from escaping.
event.stopPropagation();

if ( 9 !== event.which ) { // Tab key.
return;
}

focusableElements = collection.focusContainer.find( ':focusable' );
if ( 0 === focusableElements.length ) {
focusableElements = collection.focusContainer;
}

if ( ! $.contains( collection.focusContainer[0], event.target ) || ! $.contains( collection.focusContainer[0], document.activeElement ) ) {
event.preventDefault();
focusableElements.first().focus();
} else if ( focusableElements.last().is( event.target ) && ! event.shiftKey ) {
event.preventDefault();
focusableElements.first().focus();
} else if ( focusableElements.first().is( event.target ) && event.shiftKey ) {
event.preventDefault();
focusableElements.last().focus();
}
}
});

api.Setting = api.Value.extend(/** @lends wp.customize.Setting.prototype */{

/**
* Default params.
*
* @since 4.9.0
* @var {object}
*/
defaults: {
transport: 'refresh',
dirty: false
},

/**
* A Customizer Setting.
*
* A setting is WordPress data (theme mod, option, menu, etc.) that the user can
* draft changes to in the Customizer.
*
* @see PHP class WP_Customize_Setting.
*
* @constructs wp.customize.Setting
* @augments wp.customize.Value
*
* @since 3.4.0
*
* @param {string} id - The setting ID.
* @param {*} value - The initial value of the setting.
* @param {Object} [options={}] - Options.
* @param {string} [options.transport=refresh] - The transport to use for previewing. Supports 'refresh' and 'postMessage'.
* @param {boolean} [options.dirty=false] - Whether the setting should be considered initially dirty.
* @param {Object} [options.previewer] - The Previewer instance to sync with. Defaults to wp.customize.previewer.
*/
initialize: function( id, value, options ) {
var setting = this, params;
params = _.extend(
{ previewer: api.previewer },
setting.defaults,
options || {}
);

api.Value.prototype.initialize.call( setting, value, params );

setting.id = id;
setting._dirty = params.dirty; // The _dirty property is what the Customizer reads from.
setting.notifications = new api.Notifications();

// Whenever the setting's value changes, refresh the preview.
setting.bind( setting.preview );
},

/**
* Refresh the preview, respective of the setting's refresh policy.
*
* If the preview hasn't sent a keep-alive message and is likely
* disconnected by having navigated to a non-allowed URL, then the
* refresh transport will be forced when postMessage is the transport.
* Note that postMessage does not throw an error when the recipient window
* fails to match the origin window, so using try/catch around the
* previewer.send() call to then fallback to refresh will not work.
*
* @since 3.4.0
* @access public
*
* @return {void}
*/
preview: function() {
var setting = this, transport;
transport = setting.transport;

if ( 'postMessage' === transport && ! api.state( 'previewerAlive' ).get() ) {
transport = 'refresh';
}

if ( 'postMessage' === transport ) {
setting.previewer.send( 'setting', [ setting.id, setting() ] );
} else if ( 'refresh' === transport ) {
setting.previewer.refresh();
}
},

/**
* Find controls associated with this setting.
*
* @since 4.6.0
* @return {wp.customize.Control[]} Controls associated with setting.
*/
findControls: function() {
var setting = this, controls = [];
api.control.each( function( control ) {
_.each( control.settings, function( controlSetting ) {
if ( controlSetting.id === setting.id ) {
controls.push( control );
}
} );
} );
return controls;
}
});

/**
* Current change count.
*
* @alias wp.customize._latestRevision
*
* @since 4.7.0
* @type {number}
* @protected
*/
api._latestRevision = 0;

/**
* Last revision that was saved.
*
* @alias wp.customize._lastSavedRevision
*
* @since 4.7.0
* @type {number}
* @protected
*/
api._lastSavedRevision = 0;

/**
* Latest revisions associated with the updated setting.
*
* @alias wp.customize._latestSettingRevisions
*
* @since 4.7.0
* @type {object}
* @protected
*/
api._latestSettingRevisions = {};

/*
* Keep track of the revision associated with each updated setting so that
* requestChangesetUpdate knows which dirty settings to include. Also, once
* ready is triggered and all initial settings have been added, increment
* revision for each newly-created initially-dirty setting so that it will
* also be included in changeset update requests.
*/
api.bind( 'change', function incrementChangedSettingRevision( setting ) {
api._latestRevision += 1;
api._latestSettingRevisions[ setting.id ] = api._latestRevision;
} );
api.bind( 'ready', function() {
api.bind( 'add', function incrementCreatedSettingRevision( setting ) {
if ( setting._dirty ) {
api._latestRevision += 1;
api._latestSettingRevisions[ setting.id ] = api._latestRevision;
}
} );
} );

/**
* Get the dirty setting values.
*
* @alias wp.customize.dirtyValues
*
* @since 4.7.0
* @access public
*
* @param {Object} [options] Options.
* @param {boolean} [options.unsaved=false] Whether only values not saved yet into a changeset will be returned (differential changes).
* @return {Object} Dirty setting values.
*/
api.dirtyValues = function dirtyValues( options ) {
var values = {};
api.each( function( setting ) {
var settingRevision;

if ( ! setting._dirty ) {
return;
}

settingRevision = api._latestSettingRevisions[ setting.id ];

// Skip including settings that have already been included in the changeset, if only requesting unsaved.
if ( api.state( 'changesetStatus' ).get() && ( options && options.unsaved ) && ( _.isUndefined( settingRevision ) || settingRevision <= api._lastSavedRevision ) ) {
return;
}

values[ setting.id ] = setting.get();
} );
return values;
};

/**
* Request updates to the changeset.
*
* @alias wp.customize.requestChangesetUpdate
*
* @since 4.7.0
* @access public
*
* @param {Object} [changes] - Mapping of setting IDs to setting params each normally including a value property, or mapping to null.
* If not provided, then the changes will still be obtained from unsaved dirty settings.
* @param {Object} [args] - Additional options for the save request.
* @param {boolean} [args.autosave=false] - Whether changes will be stored in autosave revision if the changeset has been promoted from an auto-draft.
* @param {boolean} [args.force=false] - Send request to update even when there are no changes to submit. This can be used to request the latest status of the changeset on the server.
* @param {string} [args.title] - Title to update in the changeset. Optional.
* @param {string} [args.date] - Date to update in the changeset. Optional.
* @return {jQuery.Promise} Promise resolving with the response data.
*/
api.requestChangesetUpdate = function requestChangesetUpdate( changes, args ) {
var deferred, request, submittedChanges = {}, data, submittedArgs;
deferred = new $.Deferred();

// Prevent attempting changeset update while request is being made.
if ( 0 !== api.state( 'processing' ).get() ) {
deferred.reject( 'already_processing' );
return deferred.promise();
}

submittedArgs = _.extend( {
title: null,
date: null,
autosave: false,
force: false
}, args );

if ( changes ) {
_.extend( submittedChanges, changes );
}

// Ensure all revised settings (changes pending save) are also included, but not if marked for deletion in changes.
_.each( api.dirtyValues( { unsaved: true } ), function( dirtyValue, settingId ) {
if ( ! changes || null !== changes[ settingId ] ) {
submittedChanges[ settingId ] = _.extend(
{},
submittedChanges[ settingId ] || {},
{ value: dirtyValue }
);
}
} );

// Allow plugins to attach additional params to the settings.
api.trigger( 'changeset-save', submittedChanges, submittedArgs );

// Short-circuit when there are no pending changes.
if ( ! submittedArgs.force && _.isEmpty( submittedChanges ) && null === submittedArgs.title && null === submittedArgs.date ) {
deferred.resolve( {} );
return deferred.promise();
}

// A status would cause a revision to be made, and for this wp.customize.previewer.save() should be used.
// Status is also disallowed for revisions regardless.
if ( submittedArgs.status ) {
return deferred.reject( { code: 'illegal_status_in_changeset_update' } ).promise();
}

// Dates not beung allowed for revisions are is a technical limitation of post revisions.
if ( submittedArgs.date && submittedArgs.autosave ) {
return deferred.reject( { code: 'illegal_autosave_with_date_gmt' } ).promise();
}

// Make sure that publishing a changeset waits for all changeset update requests to complete.
api.state( 'processing' ).set( api.state( 'processing' ).get() + 1 );
deferred.always( function() {
api.state( 'processing' ).set( api.state( 'processing' ).get() - 1 );
} );

// Ensure that if any plugins add data to save requests by extending query() that they get included here.
data = api.previewer.query( { excludeCustomizedSaved: true } );
delete data.customized; // Being sent in customize_changeset_data instead.
_.extend( data, {
nonce: api.settings.nonce.save,
customize_theme: api.settings.theme.stylesheet,
customize_changeset_data: JSON.stringify( submittedChanges )
} );
if ( null !== submittedArgs.title ) {
data.customize_changeset_title = submittedArgs.title;
}
if ( null !== submittedArgs.date ) {
data.customize_changeset_date = submittedArgs.date;
}
if ( false !== submittedArgs.autosave ) {
data.customize_changeset_autosave = 'true';
}

// Allow plugins to modify the params included with the save request.
api.trigger( 'save-request-params', data );

request = wp.ajax.post( 'customize_save', data );

request.done( function requestChangesetUpdateDone( data ) {
var savedChangesetValues = {};

// Ensure that all settings updated subsequently will be included in the next changeset update request.
api._lastSavedRevision = Math.max( api._latestRevision, api._lastSavedRevision );

api.state( 'changesetStatus' ).set( data.changeset_status );

if ( data.changeset_date ) {
api.state( 'changesetDate' ).set( data.changeset_date );
}

deferred.resolve( data );
api.trigger( 'changeset-saved', data );

if ( data.setting_validities ) {
_.each( data.setting_validities, function( validity, settingId ) {
if ( true === validity && _.isObject( submittedChanges[ settingId ] ) && ! _.isUndefined( submittedChanges[ settingId ].value ) ) {
savedChangesetValues[ settingId ] = submittedChanges[ settingId ].value;
}
} );
}

api.previewer.send( 'changeset-saved', _.extend( {}, data, { saved_changeset_values: savedChangesetValues } ) );
} );
request.fail( function requestChangesetUpdateFail( data ) {
deferred.reject( data );
api.trigger( 'changeset-error', data );
} );
request.always( function( data ) {
if ( data.setting_validities ) {
api._handleSettingValidities( {
settingValidities: data.setting_validities
} );
}
} );

return deferred.promise();
};

/**
* Watch all changes to Value properties, and bubble changes to parent Values instance
*
* @alias wp.customize.utils.bubbleChildValueChanges
*
* @since 4.1.0
*
* @param {wp.customize.Class} instance
* @param {Array} properties The names of the Value instances to watch.
*/
api.utils.bubbleChildValueChanges = function ( instance, properties ) {
$.each( properties, function ( i, key ) {
instance[ key ].bind( function ( to, from ) {
if ( instance.parent && to !== from ) {
instance.parent.trigger( 'change', instance );
}
} );
} );
};

/**
* Expand a panel, section, or control and focus on the first focusable element.
*
* @alias wp.customize~focus
*
* @since 4.1.0
*
* @param {Object} [params]
* @param {Function} [params.completeCallback]
*/
focus = function ( params ) {
var construct, completeCallback, focus, focusElement, sections;
construct = this;
params = params || {};
focus = function () {
// If a child section is currently expanded, collapse it.
if ( construct.extended( api.Panel ) ) {
sections = construct.sections();
if ( 1 < sections.length ) {
sections.forEach( function ( section ) {
if ( section.expanded() ) {
section.collapse();
}
} );
}
}

var focusContainer;
if ( ( construct.extended( api.Panel ) || construct.extended( api.Section ) ) && construct.expanded && construct.expanded() ) {
focusContainer = construct.contentContainer;
} else {
focusContainer = construct.container;
}

focusElement = focusContainer.find( '.control-focus:first' );
if ( 0 === focusElement.length ) {
// Note that we can't use :focusable due to a jQuery UI issue. See: https://github.com/jquery/jquery-ui/pull/1583
focusElement = focusContainer.find( 'input, select, textarea, button, object, a[href], [tabindex]' ).filter( ':visible' ).first();
}
focusElement.focus();
};
if ( params.completeCallback ) {
completeCallback = params.completeCallback;
params.completeCallback = function () {
focus();
completeCallback();
};
} else {
params.completeCallback = focus;
}

api.state( 'paneVisible' ).set( true );
if ( construct.expand ) {
construct.expand( params );
} else {
params.completeCallback();
}
};

/**
* Stable sort for Panels, Sections, and Controls.
*
* If a.priority() === b.priority(), then sort by their respective params.instanceNumber.
*
* @alias wp.customize.utils.prioritySort
*
* @since 4.1.0
*
* @param {(wp.customize.Panel|wp.customize.Section|wp.customize.Control)} a
* @param {(wp.customize.Panel|wp.customize.Section|wp.customize.Control)} b
* @return {number}
*/
api.utils.prioritySort = function ( a, b ) {
if ( a.priority() === b.priority() && typeof a.params.instanceNumber === 'number' && typeof b.params.instanceNumber === 'number' ) {
return a.params.instanceNumber - b.params.instanceNumber;
} else {
return a.priority() - b.priority();
}
};

/**
* Return whether the supplied Event object is for a keydown event but not the Enter key.
*
* @alias wp.customize.utils.isKeydownButNotEnterEvent
*
* @since 4.1.0
*
* @param {jQuery.Event} event
* @return {boolean}
*/
api.utils.isKeydownButNotEnterEvent = function ( event ) {
return ( 'keydown' === event.type && 13 !== event.which );
};

/**
* Return whether the two lists of elements are the same and are in the same order.
*
* @alias wp.customize.utils.areElementListsEqual
*
* @since 4.1.0
*
* @param {Array|jQuery} listA
* @param {Array|jQuery} listB
* @return {boolean}
*/
api.utils.areElementListsEqual = function ( listA, listB ) {
var equal = (
listA.length === listB.length && // If lists are different lengths, then naturally they are not equal.
-1 === _.indexOf( _.map( // Are there any false values in the list returned by map?
_.zip( listA, listB ), // Pair up each element between the two lists.
function ( pair ) {
return $( pair[0] ).is( pair[1] ); // Compare to see if each pair is equal.
}
), false ) // Check for presence of false in map's return value.
);
return equal;
};

/**
* Highlight the existence of a button.
*
* This function reminds the user of a button represented by the specified
* UI element, after an optional delay. If the user focuses the element
* before the delay passes, the reminder is canceled.
*
* @alias wp.customize.utils.highlightButton
*
* @since 4.9.0
*
* @param {jQuery} button - The element to highlight.
* @param {Object} [options] - Options.
* @param {number} [options.delay=0] - Delay in milliseconds.
* @param {jQuery} [options.focusTarget] - A target for user focus that defaults to the highlighted element.
* If the user focuses the target before the delay passes, the reminder
* is canceled. This option exists to accommodate compound buttons
* containing auxiliary UI, such as the Publish button augmented with a
* Settings button.
* @return {Function} An idempotent function that cancels the reminder.
*/
api.utils.highlightButton = function highlightButton( button, options ) {
var animationClass = 'button-see-me',
canceled = false,
params;

params = _.extend(
{
delay: 0,
focusTarget: button
},
options
);

function cancelReminder() {
canceled = true;
}

params.focusTarget.on( 'focusin', cancelReminder );
setTimeout( function() {
params.focusTarget.off( 'focusin', cancelReminder );

if ( ! canceled ) {
button.addClass( animationClass );
button.one( 'animationend', function() {
/*
* Remove animation class to avoid situations in Customizer where
* DOM nodes are moved (re-inserted) and the animation repeats.
*/
button.removeClass( animationClass );
} );
}
}, params.delay );

return cancelReminder;
};

/**
* Get current timestamp adjusted for server clock time.
*
* Same functionality as the `current_time( 'mysql', false )` function in PHP.
*
* @alias wp.customize.utils.getCurrentTimestamp
*
* @since 4.9.0
*
* @return {number} Current timestamp.
*/
api.utils.getCurrentTimestamp = function getCurrentTimestamp() {
var currentDate, currentClientTimestamp, timestampDifferential;
currentClientTimestamp = _.now();
currentDate = new Date( api.settings.initialServerDate.replace( /-/g, '/' ) );
timestampDifferential = currentClientTimestamp - api.settings.initialClientTimestamp;
timestampDifferential += api.settings.initialClientTimestamp - api.settings.initialServerTimestamp;
currentDate.setTime( currentDate.getTime() + timestampDifferential );
return currentDate.getTime();
};

/**
* Get remaining time of when the date is set.
*
* @alias wp.customize.utils.getRemainingTime
*
* @since 4.9.0
*
* @param {string|number|Date} datetime - Date time or timestamp of the future date.
* @return {number} remainingTime - Remaining time in milliseconds.
*/
api.utils.getRemainingTime = function getRemainingTime( datetime ) {
var millisecondsDivider = 1000, remainingTime, timestamp;
if ( datetime instanceof Date ) {
timestamp = datetime.getTime();
} else if ( 'string' === typeof datetime ) {
timestamp = ( new Date( datetime.replace( /-/g, '/' ) ) ).getTime();
} else {
timestamp = datetime;
}

remainingTime = timestamp - api.utils.getCurrentTimestamp();
remainingTime = Math.ceil( remainingTime / millisecondsDivider );
return remainingTime;
};

/**
* Return browser supported `transitionend` event name.
*
* @since 4.7.0
*
* @ignore
*
* @return {string|null} Normalized `transitionend` event name or null if CSS transitions are not supported.
*/
normalizedTransitionendEventName = (function () {
var el, transitions, prop;
el = document.createElement( 'div' );
transitions = {
'transition' : 'transitionend',
'OTransition' : 'oTransitionEnd',
'MozTransition' : 'transitionend',
'WebkitTransition': 'webkitTransitionEnd'
};
prop = _.find( _.keys( transitions ), function( prop ) {
return ! _.isUndefined( el.style[ prop ] );
} );
if ( prop ) {
return transitions[ prop ];
} else {
return null;
}
})();

Container = api.Class.extend(/** @lends wp.customize~Container.prototype */{
defaultActiveArguments: { duration: 'fast', completeCallback: $.noop },
defaultExpandedArguments: { duration: 'fast', completeCallback: $.noop },
containerType: 'container',
defaults: {
title: '',
description: '',
priority: 100,
type: 'default',
content: null,
active: true,
instanceNumber: null
},

/**
* Base class for Panel and Section.
*
* @constructs wp.customize~Container
* @augments wp.customize.Class
*
* @since 4.1.0
*
* @borrows wp.customize~focus as focus
*
* @param {string} id - The ID for the container.
* @param {Object} options - Object containing one property: params.
* @param {string} options.title - Title shown when panel is collapsed and expanded.
* @param {string} [options.description] - Description shown at the top of the panel.
* @param {number} [options.priority=100] - The sort priority for the panel.
* @param {string} [options.templateId] - Template selector for container.
* @param {string} [options.type=default] - The type of the panel. See wp.customize.panelConstructor.
* @param {string} [options.content] - The markup to be used for the panel container. If empty, a JS template is used.
* @param {boolean} [options.active=true] - Whether the panel is active or not.
* @param {Object} [options.params] - Deprecated wrapper for the above properties.
*/
initialize: function ( id, options ) {
var container = this;
container.id = id;

if ( ! Container.instanceCounter ) {
Container.instanceCounter = 0;
}
Container.instanceCounter++;

$.extend( container, {
params: _.defaults(
options.params || options, // Passing the params is deprecated.
container.defaults
)
} );
if ( ! container.params.instanceNumber ) {
container.params.instanceNumber = Container.instanceCounter;
}
container.notifications = new api.Notifications();
container.templateSelector = container.params.templateId || 'customize-' + container.containerType + '-' + container.params.type;
container.container = $( container.params.content );
if ( 0 === container.container.length ) {
container.container = $( container.getContainer() );
}
container.headContainer = container.container;
container.contentContainer = container.getContent();
container.container = container.container.add( container.contentContainer );

container.deferred = {
embedded: new $.Deferred()
};
container.priority = new api.Value();
container.active = new api.Value();
container.activeArgumentsQueue = [];
container.expanded = new api.Value();
container.expandedArgumentsQueue = [];

container.active.bind( function ( active ) {
var args = container.activeArgumentsQueue.shift();
args = $.extend( {}, container.defaultActiveArguments, args );
active = ( active && container.isContextuallyActive() );
container.onChangeActive( active, args );
});
container.expanded.bind( function ( expanded ) {
var args = container.expandedArgumentsQueue.shift();
args = $.extend( {}, container.defaultExpandedArguments, args );
container.onChangeExpanded( expanded, args );
});

container.deferred.embedded.done( function () {
container.setupNotifications();
container.attachEvents();
});

api.utils.bubbleChildValueChanges( container, [ 'priority', 'active' ] );

container.priority.set( container.params.priority );
container.active.set( container.params.active );
container.expanded.set( false );
},

/**
* Get the element that will contain the notifications.
*
* @since 4.9.0
* @return {jQuery} Notification container element.
*/
getNotificationsContainerElement: function() {
var container = this;
return container.contentContainer.find( '.customize-control-notifications-container:first' );
},

/**
* Set up notifications.
*
* @since 4.9.0
* @return {void}
*/
setupNotifications: function() {
var container = this, renderNotifications;
container.notifications.container = container.getNotificationsContainerElement();

// Render notifications when they change and when the construct is expanded.
renderNotifications = function() {
if ( container.expanded.get() ) {
container.notifications.render();
}
};
container.expanded.bind( renderNotifications );
renderNotifications();
container.notifications.bind( 'change', _.debounce( renderNotifications ) );
},

/**
* @since 4.1.0
*
* @abstract
*/
ready: function() {},

/**
* Get the child models associated with this parent, sorting them by their priority Value.
*
* @since 4.1.0
*
* @param {string} parentType
* @param {string} childType
* @return {Array}
*/
_children: function ( parentType, childType ) {
var parent = this,
children = [];
api[ childType ].each( function ( child ) {
if ( child[ parentType ].get() === parent.id ) {
children.push( child );
}
} );
children.sort( api.utils.prioritySort );
return children;
},

/**
* To override by subclass, to return whether the container has active children.
*
* @since 4.1.0
*
* @abstract
*/
isContextuallyActive: function () {
throw new Error( 'Container.isContextuallyActive() must be overridden in a subclass.' );
},

/**
* Active state change handler.
*
* Shows the container if it is active, hides it if not.
*
* To override by subclass, update the container's UI to reflect the provided active state.
*
* @since 4.1.0
*
* @param {boolean} active - The active state to transiution to.
* @param {Object} [args] - Args.
* @param {Object} [args.duration] - The duration for the slideUp/slideDown animation.
* @param {boolean} [args.unchanged] - Whether the state is already known to not be changed, and so short-circuit with calling completeCallback early.
* @param {Function} [args.completeCallback] - Function to call when the slideUp/slideDown has completed.
*/
onChangeActive: function( active, args ) {
var construct = this,
headContainer = construct.headContainer,
duration, expandedOtherPanel;

if ( args.unchanged ) {
if ( args.completeCallback ) {
args.completeCallback();
}
return;
}

duration = ( 'resolved' === api.previewer.deferred.active.state() ? args.duration : 0 );

if ( construct.extended( api.Panel ) ) {
// If this is a panel is not currently expanded but another panel is expanded, do not animate.
api.panel.each(function ( panel ) {
if ( panel !== construct && panel.expanded() ) {
expandedOtherPanel = panel;
duration = 0;
}
});

// Collapse any expanded sections inside of this panel first before deactivating.
if ( ! active ) {
_.each( construct.sections(), function( section ) {
section.collapse( { duration: 0 } );
} );
}
}

if ( ! $.contains( document, headContainer.get( 0 ) ) ) {
// If the element is not in the DOM, then jQuery.fn.slideUp() does nothing.
// In this case, a hard toggle is required instead.
headContainer.toggle( active );
if ( args.completeCallback ) {
args.completeCallback();
}
} else if ( active ) {
headContainer.slideDown( duration, args.completeCallback );
} else {
if ( construct.expanded() ) {
construct.collapse({
duration: duration,
completeCallback: function() {
headContainer.slideUp( duration, args.completeCallback );
}
});
} else {
headContainer.slideUp( duration, args.completeCallback );
}
}
},

/**
* @since 4.1.0
*
* @param {boolean} active
* @param {Object} [params]
* @return {boolean} False if state already applied.
*/
_toggleActive: function ( active, params ) {
var self = this;
params = params || {};
if ( ( active && this.active.get() ) || ( ! active && ! this.active.get() ) ) {
params.unchanged = true;
self.onChangeActive( self.active.get(), params );
return false;
} else {
params.unchanged = false;
this.activeArgumentsQueue.push( params );
this.active.set( active );
return true;
}
},

/**
* @param {Object} [params]
* @return {boolean} False if already active.
*/
activate: function ( params ) {
return this._toggleActive( true, params );
},

/**
* @param {Object} [params]
* @return {boolean} False if already inactive.
*/
deactivate: function ( params ) {
return this._toggleActive( false, params );
},

/**
* To override by subclass, update the container's UI to reflect the provided active state.
* @abstract
*/
onChangeExpanded: function () {
throw new Error( 'Must override with subclass.' );
},

/**
* Handle the toggle logic for expand/collapse.
*
* @param {boolean} expanded - The new state to apply.
* @param {Object} [params] - Object containing options for expand/collapse.
* @param {Function} [params.completeCallback] - Function to call when expansion/collapse is complete.
* @return {boolean} False if state already applied or active state is false.
*/
_toggleExpanded: function( expanded, params ) {
var instance = this, previousCompleteCallback;
params = params || {};
previousCompleteCallback = params.completeCallback;

// Short-circuit expand() if the instance is not active.
if ( expanded && ! instance.active() ) {
return false;
}

api.state( 'paneVisible' ).set( true );
params.completeCallback = function() {
if ( previousCompleteCallback ) {
previousCompleteCallback.apply( instance, arguments );
}
if ( expanded ) {
instance.container.trigger( 'expanded' );
} else {
instance.container.trigger( 'collapsed' );
}
};
if ( ( expanded && instance.expanded.get() ) || ( ! expanded && ! instance.expanded.get() ) ) {
params.unchanged = true;
instance.onChangeExpanded( instance.expanded.get(), params );
return false;
} else {
params.unchanged = false;
instance.expandedArgumentsQueue.push( params );
instance.expanded.set( expanded );
return true;
}
},

/**
* @param {Object} [params]
* @return {boolean} False if already expanded or if inactive.
*/
expand: function ( params ) {
return this._toggleExpanded( true, params );
},

/**
* @param {Object} [params]
* @return {boolean} False if already collapsed.
*/
collapse: function ( params ) {
return this._toggleExpanded( false, params );
},

/**
* Animate container state change if transitions are supported by the browser.
*
* @since 4.7.0
* @private
*
* @param {function} completeCallback Function to be called after transition is completed.
* @return {void}
*/
_animateChangeExpanded: function( completeCallback ) {
// Return if CSS transitions are not supported or if reduced motion is enabled.
if ( ! normalizedTransitionendEventName || isReducedMotion ) {
// Schedule the callback until the next tick to prevent focus loss.
_.defer( function () {
if ( completeCallback ) {
completeCallback();
}
} );
return;
}

var construct = this,
content = construct.contentContainer,
overlay = content.closest( '.wp-full-overlay' ),
elements, transitionEndCallback, transitionParentPane;

// Determine set of elements that are affected by the animation.
elements = overlay.add( content );

if ( ! construct.panel || '' === construct.panel() ) {
transitionParentPane = true;
} else if ( api.panel( construct.panel() ).contentContainer.hasClass( 'skip-transition' ) ) {
transitionParentPane = true;
} else {
transitionParentPane = false;
}
if ( transitionParentPane ) {
elements = elements.add( '#customize-info, .customize-pane-parent' );
}

// Handle `transitionEnd` event.
transitionEndCallback = function( e ) {
if ( 2 !== e.eventPhase || ! $( e.target ).is( content ) ) {
return;
}
content.off( normalizedTransitionendEventName, transitionEndCallback );
elements.removeClass( 'busy' );
if ( completeCallback ) {
completeCallback();
}
};
content.on( normalizedTransitionendEventName, transitionEndCallback );
elements.addClass( 'busy' );

// Prevent screen flicker when pane has been scrolled before expanding.
_.defer( function() {
var container = content.closest( '.wp-full-overlay-sidebar-content' ),
currentScrollTop = container.scrollTop(),
previousScrollTop = content.data( 'previous-scrollTop' ) || 0,
expanded = construct.expanded();

if ( expanded && 0 < currentScrollTop ) {
content.css( 'top', currentScrollTop + 'px' );
content.data( 'previous-scrollTop', currentScrollTop );
} else if ( ! expanded && 0 < currentScrollTop + previousScrollTop ) {
content.css( 'top', previousScrollTop - currentScrollTop + 'px' );
container.scrollTop( previousScrollTop );
}
} );
},

/*
* is documented using @borrows in the constructor.
*/
focus: focus,

/**
* Return the container html, generated from its JS template, if it exists.
*
* @since 4.3.0
*/
getContainer: function () {
var template,
container = this;

if ( 0 !== $( '#tmpl-' + container.templateSelector ).length ) {
template = wp.template( container.templateSelector );
} else {
template = wp.template( 'customize-' + container.containerType + '-default' );
}
if ( template && container.container ) {
return template( _.extend(
{ id: container.id },
container.params
) ).toString().trim();
}

return '<li></li>';
},

/**
* Find content element which is displayed when the section is expanded.
*
* After a construct is initialized, the return value will be available via the `contentContainer` property.
* By default the element will be related it to the parent container with `aria-owns` and detached.
* Custom panels and sections (such as the `NewMenuSection`) that do not have a sliding pane should
* just return the content element without needing to add the `aria-owns` element or detach it from
* the container. Such non-sliding pane custom sections also need to override the `onChangeExpanded`
* method to handle animating the panel/section into and out of view.
*
* @since 4.7.0
* @access public
*
* @return {jQuery} Detached content element.
*/
getContent: function() {
var construct = this,
container = construct.container,
content = container.find( '.accordion-section-content, .control-panel-content' ).first(),
contentId = 'sub-' + container.attr( 'id' ),
ownedElements = contentId,
alreadyOwnedElements = container.attr( 'aria-owns' );

if ( alreadyOwnedElements ) {
ownedElements = ownedElements + ' ' + alreadyOwnedElements;
}
container.attr( 'aria-owns', ownedElements );

return content.detach().attr( {
'id': contentId,
'class': 'customize-pane-child ' + content.attr( 'class' ) + ' ' + container.attr( 'class' )
} );
}
});

api.Section = Container.extend(/** @lends wp.customize.Section.prototype */{
containerType: 'section',
containerParent: '#customize-theme-controls',
containerPaneParent: '.customize-pane-parent',
defaults: {
title: '',
description: '',
priority: 100,
type: 'default',
content: null,
active: true,
instanceNumber: null,
panel: null,
customizeAction: ''
},

/**
* @constructs wp.customize.Section
* @augments wp.customize~Container
*
* @since 4.1.0
*
* @param {string} id - The ID for the section.
* @param {Object} options - Options.
* @param {string} options.title - Title shown when section is collapsed and expanded.
* @param {string} [options.description] - Description shown at the top of the section.
* @param {number} [options.priority=100] - The sort priority for the section.
* @param {string} [options.type=default] - The type of the section. See wp.customize.sectionConstructor.
* @param {string} [options.content] - The markup to be used for the section container. If empty, a JS template is used.
* @param {boolean} [options.active=true] - Whether the section is active or not.
* @param {string} options.panel - The ID for the panel this section is associated with.
* @param {string} [options.customizeAction] - Additional context information shown before the section title when expanded.
* @param {Object} [options.params] - Deprecated wrapper for the above properties.
*/
initialize: function ( id, options ) {
var section = this, params;
params = options.params || options;

// Look up the type if one was not supplied.
if ( ! params.type ) {
_.find( api.sectionConstructor, function( Constructor, type ) {
if ( Constructor === section.constructor ) {
params.type = type;
return true;
}
return false;
} );
}

Container.prototype.initialize.call( section, id, params );

section.id = id;
section.panel = new api.Value();
section.panel.bind( function ( id ) {
$( section.headContainer ).toggleClass( 'control-subsection', !! id );
});
section.panel.set( section.params.panel || '' );
api.utils.bubbleChildValueChanges( section, [ 'panel' ] );

section.embed();
section.deferred.embedded.done( function () {
section.ready();
});
},

/**
* Embed the container in the DOM when any parent panel is ready.
*
* @since 4.1.0
*/
embed: function () {
var inject,
section = this;

section.containerParent = api.ensure( section.containerParent );

// Watch for changes to the panel state.
inject = function ( panelId ) {
var parentContainer;
if ( panelId ) {
// The panel has been supplied, so wait until the panel object is registered.
api.panel( panelId, function ( panel ) {
// The panel has been registered, wait for it to become ready/initialized.
panel.deferred.embedded.done( function () {
parentContainer = panel.contentContainer;
if ( ! section.headContainer.parent().is( parentContainer ) ) {
parentContainer.append( section.headContainer );
}
if ( ! section.contentContainer.parent().is( section.headContainer ) ) {
section.containerParent.append( section.contentContainer );
}
section.deferred.embedded.resolve();
});
} );
} else {
// There is no panel, so embed the section in the root of the customizer.
parentContainer = api.ensure( section.containerPaneParent );
if ( ! section.headContainer.parent().is( parentContainer ) ) {
parentContainer.append( section.headContainer );
}
if ( ! section.contentContainer.parent().is( section.headContainer ) ) {
section.containerParent.append( section.contentContainer );
}
section.deferred.embedded.resolve();
}
};
section.panel.bind( inject );
inject( section.panel.get() ); // Since a section may never get a panel, assume that it won't ever get one.
},

/**
* Add behaviors for the accordion section.
*
* @since 4.1.0
*/
attachEvents: function () {
var meta, content, section = this;

if ( section.container.hasClass( 'cannot-expand' ) ) {
return;
}

// Expand/Collapse accordion sections on click.
section.container.find( '.accordion-section-title button, .customize-section-back, .accordion-section-title[tabindex]' ).on( 'click keydown', function( event ) {
if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
return;
}
event.preventDefault(); // Keep this AFTER the key filter above.

if ( section.expanded() ) {
section.collapse();
} else {
section.expand();
}
});

// This is very similar to what is found for api.Panel.attachEvents().
section.container.find( '.customize-section-title .customize-help-toggle' ).on( 'click', function() {

meta = section.container.find( '.section-meta' );
if ( meta.hasClass( 'cannot-expand' ) ) {
return;
}
content = meta.find( '.customize-section-description:first' );
content.toggleClass( 'open' );
content.slideToggle( section.defaultExpandedArguments.duration, function() {
content.trigger( 'toggled' );
} );
$( this ).attr( 'aria-expanded', function( i, attr ) {
return 'true' === attr ? 'false' : 'true';
});
});
},

/**
* Return whether this section has any active controls.
*
* @since 4.1.0
*
* @return {boolean}
*/
isContextuallyActive: function () {
var section = this,
controls = section.controls(),
activeCount = 0;
_( controls ).each( function ( control ) {
if ( control.active() ) {
activeCount += 1;
}
} );
return ( activeCount !== 0 );
},

/**
* Get the controls that are associated with this section, sorted by their priority Value.
*
* @since 4.1.0
*
* @return {Array}
*/
controls: function () {
return this._children( 'section', 'control' );
},

/**
* Update UI to reflect expanded state.
*
* @since 4.1.0
*
* @param {boolean} expanded
* @param {Object} args
*/
onChangeExpanded: function ( expanded, args ) {
var section = this,
container = section.headContainer.closest( '.wp-full-overlay-sidebar-content' ),
content = section.contentContainer,
overlay = section.headContainer.closest( '.wp-full-overlay' ),
backBtn = content.find( '.customize-section-back' ),
sectionTitle = section.headContainer.find( '.accordion-section-title button, .accordion-section-title[tabindex]' ).first(),
expand, panel;

if ( expanded && ! content.hasClass( 'open' ) ) {

if ( args.unchanged ) {
expand = args.completeCallback;
} else {
expand = function() {
section._animateChangeExpanded( function() {
backBtn.trigger( 'focus' );
content.css( 'top', '' );
container.scrollTop( 0 );

if ( args.completeCallback ) {
args.completeCallback();
}
} );

content.addClass( 'open' );
overlay.addClass( 'section-open' );
api.state( 'expandedSection' ).set( section );
}.bind( this );
}

if ( ! args.allowMultiple ) {
api.section.each( function ( otherSection ) {
if ( otherSection !== section ) {
otherSection.collapse( { duration: args.duration } );
}
});
}

if ( section.panel() ) {
api.panel( section.panel() ).expand({
duration: args.duration,
completeCallback: expand
});
} else {
if ( ! args.allowMultiple ) {
api.panel.each( function( panel ) {
panel.collapse();
});
}
expand();
}

} else if ( ! expanded && content.hasClass( 'open' ) ) {
if ( section.panel() ) {
panel = api.panel( section.panel() );
if ( panel.contentContainer.hasClass( 'skip-transition' ) ) {
panel.collapse();
}
}
section._animateChangeExpanded( function() {

sectionTitle.trigger( 'focus' );
content.css( 'top', '' );

if ( args.completeCallback ) {
args.completeCallback();
}
} );

content.removeClass( 'open' );
overlay.removeClass( 'section-open' );
if ( section === api.state( 'expandedSection' ).get() ) {
api.state( 'expandedSection' ).set( false );
}

} else {
if ( args.completeCallback ) {
args.completeCallback();
}
}
}
});

api.ThemesSection = api.Section.extend(/** @lends wp.customize.ThemesSection.prototype */{
currentTheme: '',
overlay: '',
template: '',
screenshotQueue: null,
$window: null,
$body: null,
loaded: 0,
loading: false,
fullyLoaded: false,
term: '',
tags: '',
nextTerm: '',
nextTags: '',
filtersHeight: 0,
headerContainer: null,
updateCountDebounced: null,

/**
* wp.customize.ThemesSection
*
* Custom section for themes that loads themes by category, and also
* handles the theme-details view rendering and navigation.
*
* @constructs wp.customize.ThemesSection
* @augments wp.customize.Section
*
* @since 4.9.0
*
* @param {string} id - ID.
* @param {Object} options - Options.
* @return {void}
*/
initialize: function( id, options ) {
var section = this;
section.headerContainer = $();
section.$window = $( window );
section.$body = $( document.body );
api.Section.prototype.initialize.call( section, id, options );
section.updateCountDebounced = _.debounce( section.updateCount, 500 );
},

/**
* Embed the section in the DOM when the themes panel is ready.
*
* Insert the section before the themes container. Assume that a themes section is within a panel, but not necessarily the themes panel.
*
* @since 4.9.0
*/
embed: function() {
var inject,
section = this;

// Watch for changes to the panel state.
inject = function( panelId ) {
var parentContainer;
api.panel( panelId, function( panel ) {

// The panel has been registered, wait for it to become ready/initialized.
panel.deferred.embedded.done( function() {
parentContainer = panel.contentContainer;
if ( ! section.headContainer.parent().is( parentContainer ) ) {
parentContainer.find( '.customize-themes-full-container-container' ).before( section.headContainer );
}
if ( ! section.contentContainer.parent().is( section.headContainer ) ) {
section.containerParent.append( section.contentContainer );
}
section.deferred.embedded.resolve();
});
} );
};
section.panel.bind( inject );
inject( section.panel.get() ); // Since a section may never get a panel, assume that it won't ever get one.
},

/**
* Set up.
*
* @since 4.2.0
*
* @return {void}
*/
ready: function() {
var section = this;
section.overlay = section.container.find( '.theme-overlay' );
section.template = wp.template( 'customize-themes-details-view' );

// Bind global keyboard events.
section.container.on( 'keydown', function( event ) {
if ( ! section.overlay.find( '.theme-wrap' ).is( ':visible' ) ) {
return;
}

// Pressing the right arrow key fires a theme:next event.
if ( 39 === event.keyCode ) {
section.nextTheme();
}

// Pressing the left arrow key fires a theme:previous event.
if ( 37 === event.keyCode ) {
section.previousTheme();
}

// Pressing the escape key fires a theme:collapse event.
if ( 27 === event.keyCode ) {
if ( section.$body.hasClass( 'modal-open' ) ) {

// Escape from the details modal.
section.closeDetails();
} else {

// Escape from the infinite scroll list.
section.headerContainer.find( '.customize-themes-section-title' ).focus();
}
event.stopPropagation(); // Prevent section from being collapsed.
}
});

section.renderScreenshots = _.throttle( section.renderScreenshots, 100 );

_.bindAll( section, 'renderScreenshots', 'loadMore', 'checkTerm', 'filtersChecked' );
},

/**
* Override Section.isContextuallyActive method.
*
* Ignore the active states' of the contained theme controls, and just
* use the section's own active state instead. This prevents empty search
* results for theme sections from causing the section to become inactive.
*
* @since 4.2.0
*
* @return {boolean}
*/
isContextuallyActive: function () {
return this.active();
},

/**
* Attach events.
*
* @since 4.2.0
*
* @return {void}
*/
attachEvents: function () {
var section = this, debounced;

// Expand/Collapse accordion sections on click.
section.container.find( '.customize-section-back' ).on( 'click keydown', function( event ) {
if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
return;
}
event.preventDefault(); // Keep this AFTER the key filter above.
section.collapse();
});

section.headerContainer = $( '#accordion-section-' + section.id );

// Expand section/panel. Only collapse when opening another section.
section.headerContainer.on( 'click', '.customize-themes-section-title', function() {

// Toggle accordion filters under section headers.
if ( section.headerContainer.find( '.filter-details' ).length ) {
section.headerContainer.find( '.customize-themes-section-title' )
.toggleClass( 'details-open' )
.attr( 'aria-expanded', function( i, attr ) {
return 'true' === attr ? 'false' : 'true';
});
section.headerContainer.find( '.filter-details' ).slideToggle( 180 );
}

// Open the section.
if ( ! section.expanded() ) {
section.expand();
}
});

// Preview installed themes.
section.container.on( 'click', '.theme-actions .preview-theme', function() {
api.panel( 'themes' ).loadThemePreview( $( this ).data( 'slug' ) );
});

// Theme navigation in details view.
section.container.on( 'click', '.left', function() {
section.previousTheme();
});

section.container.on( 'click', '.right', function() {
section.nextTheme();
});

section.container.on( 'click', '.theme-backdrop, .close', function() {
section.closeDetails();
});

if ( 'local' === section.params.filter_type ) {

// Filter-search all theme objects loaded in the section.
section.container.on( 'input', '.wp-filter-search-themes', function( event ) {
section.filterSearch( event.currentTarget.value );
});

} else if ( 'remote' === section.params.filter_type ) {

// Event listeners for remote queries with user-entered terms.
// Search terms.
debounced = _.debounce( section.checkTerm, 500 ); // Wait until there is no input for 500 milliseconds to initiate a search.
section.contentContainer.on( 'input', '.wp-filter-search', function() {
if ( ! api.panel( 'themes' ).expanded() ) {
return;
}
debounced( section );
if ( ! section.expanded() ) {
section.expand();
}
});

// Feature filters.
section.contentContainer.on( 'click', '.filter-group input', function() {
section.filtersChecked();
section.checkTerm( section );
});
}

// Toggle feature filters.
section.contentContainer.on( 'click', '.feature-filter-toggle', function( e ) {
var $themeContainer = $( '.customize-themes-full-container' ),
$filterToggle = $( e.currentTarget );
section.filtersHeight = $filterToggle.parents( '.themes-filter-bar' ).next( '.filter-drawer' ).height();

if ( 0 < $themeContainer.scrollTop() ) {
$themeContainer.animate( { scrollTop: 0 }, 400 );

if ( $filterToggle.hasClass( 'open' ) ) {
return;
}
}

$filterToggle
.toggleClass( 'open' )
.attr( 'aria-expanded', function( i, attr ) {
return 'true' === attr ? 'false' : 'true';
})
.parents( '.themes-filter-bar' ).next( '.filter-drawer' ).slideToggle( 180, 'linear' );

if ( $filterToggle.hasClass( 'open' ) ) {
var marginOffset = 1018 < window.innerWidth ? 50 : 76;

section.contentContainer.find( '.themes' ).css( 'margin-top', section.filtersHeight + marginOffset );
} else {
section.contentContainer.find( '.themes' ).css( 'margin-top', 0 );
}
});

// Setup section cross-linking.
section.contentContainer.on( 'click', '.no-themes-local .search-dotorg-themes', function() {
api.section( 'wporg_themes' ).focus();
});

function updateSelectedState() {
var el = section.headerContainer.find( '.customize-themes-section-title' );
el.toggleClass( 'selected', section.expanded() );
el.attr( 'aria-expanded', section.expanded() ? 'true' : 'false' );
if ( ! section.expanded() ) {
el.removeClass( 'details-open' );
}
}
section.expanded.bind( updateSelectedState );
updateSelectedState();

// Move section controls to the themes area.
api.bind( 'ready', function () {
section.contentContainer = section.container.find( '.customize-themes-section' );
section.contentContainer.appendTo( $( '.customize-themes-full-container' ) );
section.container.add( section.headerContainer );
});
},

/**
* Update UI to reflect expanded state
*
* @since 4.2.0
*
* @param {boolean} expanded
* @param {Object} args
* @param {boolean} args.unchanged
* @param {Function} args.completeCallback
* @return {void}
*/
onChangeExpanded: function ( expanded, args ) {

// Note: there is a second argument 'args' passed.
var section = this,
container = section.contentContainer.closest( '.customize-themes-full-container' );

// Immediately call the complete callback if there were no changes.
if ( args.unchanged ) {
if ( args.completeCallback ) {
args.completeCallback();
}
return;
}

function expand() {

// Try to load controls if none are loaded yet.
if ( 0 === section.loaded ) {
section.loadThemes();
}

// Collapse any sibling sections/panels.
api.section.each( function ( otherSection ) {
var searchTerm;

if ( otherSection !== section ) {

// Try to sync the current search term to the new section.
if ( 'themes' === otherSection.params.type ) {
searchTerm = otherSection.contentContainer.find( '.wp-filter-search' ).val();
section.contentContainer.find( '.wp-filter-search' ).val( searchTerm );

// Directly initialize an empty remote search to avoid a race condition.
if ( '' === searchTerm && '' !== section.term && 'local' !== section.params.filter_type ) {
section.term = '';
section.initializeNewQuery( section.term, section.tags );
} else {
if ( 'remote' === section.params.filter_type ) {
section.checkTerm( section );
} else if ( 'local' === section.params.filter_type ) {
section.filterSearch( searchTerm );
}
}
otherSection.collapse( { duration: args.duration } );
}
}
});

section.contentContainer.addClass( 'current-section' );
container.scrollTop();

container.on( 'scroll', _.throttle( section.renderScreenshots, 300 ) );
container.on( 'scroll', _.throttle( section.loadMore, 300 ) );

if ( args.completeCallback ) {
args.completeCallback();
}
section.updateCount(); // Show this section's count.
}

if ( expanded ) {
if ( section.panel() && api.panel.has( section.panel() ) ) {
api.panel( section.panel() ).expand({
duration: args.duration,
completeCallback: expand
});
} else {
expand();
}
} else {
section.contentContainer.removeClass( 'current-section' );

// Always hide, even if they don't exist or are already hidden.
section.headerContainer.find( '.filter-details' ).slideUp( 180 );

container.off( 'scroll' );

if ( args.completeCallback ) {
args.completeCallback();
}
}
},

/**
* Return the section's content element without detaching from the parent.
*
* @since 4.9.0
*
* @return {jQuery}
*/
getContent: function() {
return this.container.find( '.control-section-content' );
},

/**
* Load theme data via Ajax and add themes to the section as controls.
*
* @since 4.9.0
*
* @return {void}
*/
loadThemes: function() {
var section = this, params, page, request;

if ( section.loading ) {
return; // We're already loading a batch of themes.
}

// Parameters for every API query. Additional params are set in PHP.
page = Math.ceil( section.loaded / 100 ) + 1;
params = {
'nonce': api.settings.nonce.switch_themes,
'wp_customize': 'on',
'theme_action': section.params.action,
'customized_theme': api.settings.theme.stylesheet,
'page': page
};

// Add fields for remote filtering.
if ( 'remote' === section.params.filter_type ) {
params.search = section.term;
params.tags = section.tags;
}

// Load themes.
section.headContainer.closest( '.wp-full-overlay' ).addClass( 'loading' );
section.loading = true;
section.container.find( '.no-themes' ).hide();
request = wp.ajax.post( 'customize_load_themes', params );
request.done(function( data ) {
var themes = data.themes;

// Stop and try again if the term changed while loading.
if ( '' !== section.nextTerm || '' !== section.nextTags ) {
if ( section.nextTerm ) {
section.term = section.nextTerm;
}
if ( section.nextTags ) {
section.tags = section.nextTags;
}
section.nextTerm = '';
section.nextTags = '';
section.loading = false;
section.loadThemes();
return;
}

if ( 0 !== themes.length ) {

section.loadControls( themes, page );

if ( 1 === page ) {

// Pre-load the first 3 theme screenshots.
_.each( section.controls().slice( 0, 3 ), function( control ) {
var img, src = control.params.theme.screenshot[0];
if ( src ) {
img = new Image();
img.src = src;
}
});
if ( 'local' !== section.params.filter_type ) {
wp.a11y.speak( api.settings.l10n.themeSearchResults.replace( '%d', data.info.results ) );
}
}

_.delay( section.renderScreenshots, 100 ); // Wait for the controls to become visible.

if ( 'local' === section.params.filter_type || 100 > themes.length ) {
// If we have less than the requested 100 themes, it's the end of the list.
section.fullyLoaded = true;
}
} else {
if ( 0 === section.loaded ) {
section.container.find( '.no-themes' ).show();
wp.a11y.speak( section.container.find( '.no-themes' ).text() );
} else {
section.fullyLoaded = true;
}
}
if ( 'local' === section.params.filter_type ) {
section.updateCount(); // Count of visible theme controls.
} else {
section.updateCount( data.info.results ); // Total number of results including pages not yet loaded.
}
section.container.find( '.unexpected-error' ).hide(); // Hide error notice in case it was previously shown.

// This cannot run on request.always, as section.loading may turn false before the new controls load in the success case.
section.headContainer.closest( '.wp-full-overlay' ).removeClass( 'loading' );
section.loading = false;
});
request.fail(function( data ) {
if ( 'undefined' === typeof data ) {
section.container.find( '.unexpected-error' ).show();
wp.a11y.speak( section.container.find( '.unexpected-error' ).text() );
} else if ( 'undefined' !== typeof console && console.error ) {
console.error( data );
}

// This cannot run on request.always, as section.loading may turn false before the new controls load in the success case.
section.headContainer.closest( '.wp-full-overlay' ).removeClass( 'loading' );
section.loading = false;
});
},

/**
* Loads controls into the section from data received from loadThemes().
*
* @since 4.9.0
* @param {Array} themes - Array of theme data to create controls with.
* @param {number} page - Page of results being loaded.
* @return {void}
*/
loadControls: function( themes, page ) {
var newThemeControls = [],
section = this;

// Add controls for each theme.
_.each( themes, function( theme ) {
var themeControl = new api.controlConstructor.theme( section.params.action + '_theme_' + theme.id, {
type: 'theme',
section: section.params.id,
theme: theme,
priority: section.loaded + 1
} );

api.control.add( themeControl );
newThemeControls.push( themeControl );
section.loaded = section.loaded + 1;
});

if ( 1 !== page ) {
Array.prototype.push.apply( section.screenshotQueue, newThemeControls ); // Add new themes to the screenshot queue.
}
},

/**
* Determines whether more themes should be loaded, and loads them.
*
* @since 4.9.0
* @return {void}
*/
loadMore: function() {
var section = this, container, bottom, threshold;
if ( ! section.fullyLoaded && ! section.loading ) {
container = section.container.closest( '.customize-themes-full-container' );

bottom = container.scrollTop() + container.height();
// Use a fixed distance to the bottom of loaded results to avoid unnecessarily
// loading results sooner when using a percentage of scroll distance.
threshold = container.prop( 'scrollHeight' ) - 3000;

if ( bottom > threshold ) {
section.loadThemes();
}
}
},

/**
* Event handler for search input that filters visible controls.
*
* @since 4.9.0
*
* @param {string} term - The raw search input value.
* @return {void}
*/
filterSearch: function( term ) {
var count = 0,
visible = false,
section = this,
noFilter = ( api.section.has( 'wporg_themes' ) && 'remote' !== section.params.filter_type ) ? '.no-themes-local' : '.no-themes',
controls = section.controls(),
terms;

if ( section.loading ) {
return;
}

// Standardize search term format and split into an array of individual words.
terms = term.toLowerCase().trim().replace( /-/g, ' ' ).split( ' ' );

_.each( controls, function( control ) {
visible = control.filter( terms ); // Shows/hides and sorts control based on the applicability of the search term.
if ( visible ) {
count = count + 1;
}
});

if ( 0 === count ) {
section.container.find( noFilter ).show();
wp.a11y.speak( section.container.find( noFilter ).text() );
} else {
section.container.find( noFilter ).hide();
}

section.renderScreenshots();
api.reflowPaneContents();

// Update theme count.
section.updateCountDebounced( count );
},

/**
* Event handler for search input that determines if the terms have changed and loads new controls as needed.
*
* @since 4.9.0
*
* @param {wp.customize.ThemesSection} section - The current theme section, passed through the debouncer.
* @return {void}
*/
checkTerm: function( section ) {
var newTerm;
if ( 'remote' === section.params.filter_type ) {
newTerm = section.contentContainer.find( '.wp-filter-search' ).val();
if ( section.term !== newTerm.trim() ) {
section.initializeNewQuery( newTerm, section.tags );
}
}
},

/**
* Check for filters checked in the feature filter list and initialize a new query.
*
* @since 4.9.0
*
* @return {void}
*/
filtersChecked: function() {
var section = this,
items = section.container.find( '.filter-group' ).find( ':checkbox' ),
tags = [];

_.each( items.filter( ':checked' ), function( item ) {
tags.push( $( item ).prop( 'value' ) );
});

// When no filters are checked, restore initial state. Update filter count.
if ( 0 === tags.length ) {
tags = '';
section.contentContainer.find( '.feature-filter-toggle .filter-count-0' ).show();
section.contentContainer.find( '.feature-filter-toggle .filter-count-filters' ).hide();
} else {
section.contentContainer.find( '.feature-filter-toggle .theme-filter-count' ).text( tags.length );
section.contentContainer.find( '.feature-filter-toggle .filter-count-0' ).hide();
section.contentContainer.find( '.feature-filter-toggle .filter-count-filters' ).show();
}

// Check whether tags have changed, and either load or queue them.
if ( ! _.isEqual( section.tags, tags ) ) {
if ( section.loading ) {
section.nextTags = tags;
} else {
if ( 'remote' === section.params.filter_type ) {
section.initializeNewQuery( section.term, tags );
} else if ( 'local' === section.params.filter_type ) {
section.filterSearch( tags.join( ' ' ) );
}
}
}
},

/**
* Reset the current query and load new results.
*
* @since 4.9.0
*
* @param {string} newTerm - New term.
* @param {Array} newTags - New tags.
* @return {void}
*/
initializeNewQuery: function( newTerm, newTags ) {
var section = this;

// Clear the controls in the section.
_.each( section.controls(), function( control ) {
control.container.remove();
api.control.remove( control.id );
});
section.loaded = 0;
section.fullyLoaded = false;
section.screenshotQueue = null;

// Run a new query, with loadThemes handling paging, etc.
if ( ! section.loading ) {
section.term = newTerm;
section.tags = newTags;
section.loadThemes();
} else {
section.nextTerm = newTerm; // This will reload from loadThemes() with the newest term once the current batch is loaded.
section.nextTags = newTags; // This will reload from loadThemes() with the newest tags once the current batch is loaded.
}
if ( ! section.expanded() ) {
section.expand(); // Expand the section if it isn't expanded.
}
},

/**
* Render control's screenshot if the control comes into view.
*
* @since 4.2.0
*
* @return {void}
*/
renderScreenshots: function() {
var section = this;

// Fill queue initially, or check for more if empty.
if ( null === section.screenshotQueue || 0 === section.screenshotQueue.length ) {

// Add controls that haven't had their screenshots rendered.
section.screenshotQueue = _.filter( section.controls(), function( control ) {
return ! control.screenshotRendered;
});
}

// Are all screenshots rendered (for now)?
if ( ! section.screenshotQueue.length ) {
return;
}

section.screenshotQueue = _.filter( section.screenshotQueue, function( control ) {
var $imageWrapper = control.container.find( '.theme-screenshot' ),
$image = $imageWrapper.find( 'img' );

if ( ! $image.length ) {
return false;
}

if ( $image.is( ':hidden' ) ) {
return true;
}

// Based on unveil.js.
var wt = section.$window.scrollTop(),
wb = wt + section.$window.height(),
et = $image.offset().top,
ih = $imageWrapper.height(),
eb = et + ih,
threshold = ih * 3,
inView = eb >= wt - threshold && et <= wb + threshold;

if ( inView ) {
control.container.trigger( 'render-screenshot' );
}

// If the image is in view return false so it's cleared from the queue.
return ! inView;
} );
},

/**
* Get visible count.
*
* @since 4.9.0
*
* @return {number} Visible count.
*/
getVisibleCount: function() {
return this.contentContainer.find( 'li.customize-control:visible' ).length;
},

/**
* Update the number of themes in the section.
*
* @since 4.9.0
*
* @return {void}
*/
updateCount: function( count ) {
var section = this, countEl, displayed;

if ( ! count && 0 !== count ) {
count = section.getVisibleCount();
}

displayed = section.contentContainer.find( '.themes-displayed' );
countEl = section.contentContainer.find( '.theme-count' );

if ( 0 === count ) {
countEl.text( '0' );
} else {

// Animate the count change for emphasis.
displayed.fadeOut( 180, function() {
countEl.text( count );
displayed.fadeIn( 180 );
} );
wp.a11y.speak( api.settings.l10n.announceThemeCount.replace( '%d', count ) );
}
},

/**
* Advance the modal to the next theme.
*
* @since 4.2.0
*
* @return {void}
*/
nextTheme: function () {
var section = this;
if ( section.getNextTheme() ) {
section.showDetails( section.getNextTheme(), function() {
section.overlay.find( '.right' ).focus();
} );
}
},

/**
* Get the next theme model.
*
* @since 4.2.0
*
* @return {wp.customize.ThemeControl|boolean} Next theme.
*/
getNextTheme: function () {
var section = this, control, nextControl, sectionControls, i;
control = api.control( section.params.action + '_theme_' + section.currentTheme );
sectionControls = section.controls();
i = _.indexOf( sectionControls, control );
if ( -1 === i ) {
return false;
}

nextControl = sectionControls[ i + 1 ];
if ( ! nextControl ) {
return false;
}
return nextControl.params.theme;
},

/**
* Advance the modal to the previous theme.
*
* @since 4.2.0
* @return {void}
*/
previousTheme: function () {
var section = this;
if ( section.getPreviousTheme() ) {
section.showDetails( section.getPreviousTheme(), function() {
section.overlay.find( '.left' ).focus();
} );
}
},

/**
* Get the previous theme model.
*
* @since 4.2.0
* @return {wp.customize.ThemeControl|boolean} Previous theme.
*/
getPreviousTheme: function () {
var section = this, control, nextControl, sectionControls, i;
control = api.control( section.params.action + '_theme_' + section.currentTheme );
sectionControls = section.controls();
i = _.indexOf( sectionControls, control );
if ( -1 === i ) {
return false;
}

nextControl = sectionControls[ i - 1 ];
if ( ! nextControl ) {
return false;
}
return nextControl.params.theme;
},

/**
* Disable buttons when we're viewing the first or last theme.
*
* @since 4.2.0
*
* @return {void}
*/
updateLimits: function () {
if ( ! this.getNextTheme() ) {
this.overlay.find( '.right' ).addClass( 'disabled' );
}
if ( ! this.getPreviousTheme() ) {
this.overlay.find( '.left' ).addClass( 'disabled' );
}
},

/**
* Load theme preview.
*
* @since 4.7.0
* @access public
*
* @deprecated
* @param {string} themeId Theme ID.
* @return {jQuery.promise} Promise.
*/
loadThemePreview: function( themeId ) {
return api.ThemesPanel.prototype.loadThemePreview.call( this, themeId );
},

/**
* Render & show the theme details for a given theme model.
*
* @since 4.2.0
*
* @param {Object} theme - Theme.
* @param {Function} [callback] - Callback once the details have been shown.
* @return {void}
*/
showDetails: function ( theme, callback ) {
var section = this, panel = api.panel( 'themes' );
section.currentTheme = theme.id;
section.overlay.html( section.template( theme ) )
.fadeIn( 'fast' )
.focus();

function disableSwitchButtons() {
return ! panel.canSwitchTheme( theme.id );
}

// Temporary special function since supplying SFTP credentials does not work yet. See #42184.
function disableInstallButtons() {
return disableSwitchButtons() || false === api.settings.theme._canInstall || true === api.settings.theme._filesystemCredentialsNeeded;
}

section.overlay.find( 'button.preview, button.preview-theme' ).toggleClass( 'disabled', disableSwitchButtons() );
section.overlay.find( 'button.theme-install' ).toggleClass( 'disabled', disableInstallButtons() );

section.$body.addClass( 'modal-open' );
section.containFocus( section.overlay );
section.updateLimits();
wp.a11y.speak( api.settings.l10n.announceThemeDetails.replace( '%s', theme.name ) );
if ( callback ) {
callback();
}
},

/**
* Close the theme details modal.
*
* @since 4.2.0
*
* @return {void}
*/
closeDetails: function () {
var section = this;
section.$body.removeClass( 'modal-open' );
section.overlay.fadeOut( 'fast' );
api.control( section.params.action + '_theme_' + section.currentTheme ).container.find( '.theme' ).focus();
},

/**
* Keep tab focus within the theme details modal.
*
* @since 4.2.0
*
* @param {jQuery} el - Element to contain focus.
* @return {void}
*/
containFocus: function( el ) {
var tabbables;

el.on( 'keydown', function( event ) {

// Return if it's not the tab key
// When navigating with prev/next focus is already handled.
if ( 9 !== event.keyCode ) {
return;
}

// Uses jQuery UI to get the tabbable elements.
tabbables = $( ':tabbable', el );

// Keep focus within the overlay.
if ( tabbables.last()[0] === event.target && ! event.shiftKey ) {
tabbables.first().focus();
return false;
} else if ( tabbables.first()[0] === event.target && event.shiftKey ) {
tabbables.last().focus();
return false;
}
});
}
});

api.OuterSection = api.Section.extend(/** @lends wp.customize.OuterSection.prototype */{

/**
* Class wp.customize.OuterSection.
*
* Creates section outside of the sidebar, there is no ui to trigger collapse/expand so
* it would require custom handling.
*
* @constructs wp.customize.OuterSection
* @augments wp.customize.Section
*
* @since 4.9.0
*
* @return {void}
*/
initialize: function() {
var section = this;
section.containerParent = '#customize-outer-theme-controls';
section.containerPaneParent = '.customize-outer-pane-parent';
api.Section.prototype.initialize.apply( section, arguments );
},

/**
* Overrides api.Section.prototype.onChangeExpanded to prevent collapse/expand effect
* on other sections and panels.
*
* @since 4.9.0
*
* @param {boolean} expanded - The expanded state to transition to.
* @param {Object} [args] - Args.
* @param {boolean} [args.unchanged] - Whether the state is already known to not be changed, and so short-circuit with calling completeCallback early.
* @param {Function} [args.completeCallback] - Function to call when the slideUp/slideDown has completed.
* @param {Object} [args.duration] - The duration for the animation.
*/
onChangeExpanded: function( expanded, args ) {
var section = this,
container = section.headContainer.closest( '.wp-full-overlay-sidebar-content' ),
content = section.contentContainer,
backBtn = content.find( '.customize-section-back' ),
sectionTitle = section.headContainer.find( '.accordion-section-title button, .accordion-section-title[tabindex]' ).first(),
body = $( document.body ),
expand, panel;

body.toggleClass( 'outer-section-open', expanded );
section.container.toggleClass( 'open', expanded );
section.container.removeClass( 'busy' );
api.section.each( function( _section ) {
if ( 'outer' === _section.params.type && _section.id !== section.id ) {
_section.container.removeClass( 'open' );
}
} );

if ( expanded && ! content.hasClass( 'open' ) ) {

if ( args.unchanged ) {
expand = args.completeCallback;
} else {
expand = function() {
section._animateChangeExpanded( function() {
backBtn.trigger( 'focus' );
content.css( 'top', '' );
container.scrollTop( 0 );

if ( args.completeCallback ) {
args.completeCallback();
}
} );

content.addClass( 'open' );
}.bind( this );
}

if ( section.panel() ) {
api.panel( section.panel() ).expand({
duration: args.duration,
completeCallback: expand
});
} else {
expand();
}

} else if ( ! expanded && content.hasClass( 'open' ) ) {
if ( section.panel() ) {
panel = api.panel( section.panel() );
if ( panel.contentContainer.hasClass( 'skip-transition' ) ) {
panel.collapse();
}
}
section._animateChangeExpanded( function() {

sectionTitle.trigger( 'focus' );
content.css( 'top', '' );

if ( args.completeCallback ) {
args.completeCallback();
}
} );

content.removeClass( 'open' );

} else {
if ( args.completeCallback ) {
args.completeCallback();
}
}
}
});

api.Panel = Container.extend(/** @lends wp.customize.Panel.prototype */{
containerType: 'panel',

/**
* @constructs wp.customize.Panel
* @augments wp.customize~Container
*
* @since 4.1.0
*
* @param {string} id - The ID for the panel.
* @param {Object} options - Object containing one property: params.
* @param {string} options.title - Title shown when panel is collapsed and expanded.
* @param {string} [options.description] - Description shown at the top of the panel.
* @param {number} [options.priority=100] - The sort priority for the panel.
* @param {string} [options.type=default] - The type of the panel. See wp.customize.panelConstructor.
* @param {string} [options.content] - The markup to be used for the panel container. If empty, a JS template is used.
* @param {boolean} [options.active=true] - Whether the panel is active or not.
* @param {Object} [options.params] - Deprecated wrapper for the above properties.
*/
initialize: function ( id, options ) {
var panel = this, params;
params = options.params || options;

// Look up the type if one was not supplied.
if ( ! params.type ) {
_.find( api.panelConstructor, function( Constructor, type ) {
if ( Constructor === panel.constructor ) {
params.type = type;
return true;
}
return false;
} );
}

Container.prototype.initialize.call( panel, id, params );

panel.embed();
panel.deferred.embedded.done( function () {
panel.ready();
});
},

/**
* Embed the container in the DOM when any parent panel is ready.
*
* @since 4.1.0
*/
embed: function () {
var panel = this,
container = $( '#customize-theme-controls' ),
parentContainer = $( '.customize-pane-parent' ); // @todo This should be defined elsewhere, and to be configurable.

if ( ! panel.headContainer.parent().is( parentContainer ) ) {
parentContainer.append( panel.headContainer );
}
if ( ! panel.contentContainer.parent().is( panel.headContainer ) ) {
container.append( panel.contentContainer );
}
panel.renderContent();

panel.deferred.embedded.resolve();
},

/**
* @since 4.1.0
*/
attachEvents: function () {
var meta, panel = this;

// Expand/Collapse accordion sections on click.
panel.headContainer.find( '.accordion-section-title button, .accordion-section-title[tabindex]' ).on( 'click keydown', function( event ) {
if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
return;
}
event.preventDefault(); // Keep this AFTER the key filter above.

if ( ! panel.expanded() ) {
panel.expand();
}
});

// Close panel.
panel.container.find( '.customize-panel-back' ).on( 'click keydown', function( event ) {
if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
return;
}
event.preventDefault(); // Keep this AFTER the key filter above.

if ( panel.expanded() ) {
panel.collapse();
}
});

meta = panel.container.find( '.panel-meta:first' );

meta.find( '> .accordion-section-title .customize-help-toggle' ).on( 'click', function() {
if ( meta.hasClass( 'cannot-expand' ) ) {
return;
}

var content = meta.find( '.customize-panel-description:first' );
if ( meta.hasClass( 'open' ) ) {
meta.toggleClass( 'open' );
content.slideUp( panel.defaultExpandedArguments.duration, function() {
content.trigger( 'toggled' );
} );
$( this ).attr( 'aria-expanded', false );
} else {
content.slideDown( panel.defaultExpandedArguments.duration, function() {
content.trigger( 'toggled' );
} );
meta.toggleClass( 'open' );
$( this ).attr( 'aria-expanded', true );
}
});

},

/**
* Get the sections that are associated with this panel, sorted by their priority Value.
*
* @since 4.1.0
*
* @return {Array}
*/
sections: function () {
return this._children( 'panel', 'section' );
},

/**
* Return whether this panel has any active sections.
*
* @since 4.1.0
*
* @return {boolean} Whether contextually active.
*/
isContextuallyActive: function () {
var panel = this,
sections = panel.sections(),
activeCount = 0;
_( sections ).each( function ( section ) {
if ( section.active() && section.isContextuallyActive() ) {
activeCount += 1;
}
} );
return ( activeCount !== 0 );
},

/**
* Update UI to reflect expanded state.
*
* @since 4.1.0
*
* @param {boolean} expanded
* @param {Object} args
* @param {boolean} args.unchanged
* @param {Function} args.completeCallback
* @return {void}
*/
onChangeExpanded: function ( expanded, args ) {

// Immediately call the complete callback if there were no changes.
if ( args.unchanged ) {
if ( args.completeCallback ) {
args.completeCallback();
}
return;
}

// Note: there is a second argument 'args' passed.
var panel = this,
accordionSection = panel.contentContainer,
overlay = accordionSection.closest( '.wp-full-overlay' ),
container = accordionSection.closest( '.wp-full-overlay-sidebar-content' ),
topPanel = panel.headContainer.find( '.accordion-section-title button, .accordion-section-title[tabindex]' ),
backBtn = accordionSection.find( '.customize-panel-back' ),
childSections = panel.sections(),
skipTransition;

if ( expanded && ! accordionSection.hasClass( 'current-panel' ) ) {
// Collapse any sibling sections/panels.
api.section.each( function ( section ) {
if ( panel.id !== section.panel() ) {
section.collapse( { duration: 0 } );
}
});
api.panel.each( function ( otherPanel ) {
if ( panel !== otherPanel ) {
otherPanel.collapse( { duration: 0 } );
}
});

if ( panel.params.autoExpandSoleSection && 1 === childSections.length && childSections[0].active.get() ) {
accordionSection.addClass( 'current-panel skip-transition' );
overlay.addClass( 'in-sub-panel' );

childSections[0].expand( {
completeCallback: args.completeCallback
} );
} else {
panel._animateChangeExpanded( function() {
backBtn.trigger( 'focus' );
accordionSection.css( 'top', '' );
container.scrollTop( 0 );

if ( args.completeCallback ) {
args.completeCallback();
}
} );

accordionSection.addClass( 'current-panel' );
overlay.addClass( 'in-sub-panel' );
}

api.state( 'expandedPanel' ).set( panel );

} else if ( ! expanded && accordionSection.hasClass( 'current-panel' ) ) {
skipTransition = accordionSection.hasClass( 'skip-transition' );
if ( ! skipTransition ) {
panel._animateChangeExpanded( function() {

topPanel.focus();
accordionSection.css( 'top', '' );

if ( args.completeCallback ) {
args.completeCallback();
}
} );
} else {
accordionSection.removeClass( 'skip-transition' );
}

overlay.removeClass( 'in-sub-panel' );
accordionSection.removeClass( 'current-panel' );
if ( panel === api.state( 'expandedPanel' ).get() ) {
api.state( 'expandedPanel' ).set( false );
}
}
},

/**
* Render the panel from its JS template, if it exists.
*
* The panel's container must already exist in the DOM.
*
* @since 4.3.0
*/
renderContent: function () {
var template,
panel = this;

// Add the content to the container.
if ( 0 !== $( '#tmpl-' + panel.templateSelector + '-content' ).length ) {
template = wp.template( panel.templateSelector + '-content' );
} else {
template = wp.template( 'customize-panel-default-content' );
}
if ( template && panel.headContainer ) {
panel.contentContainer.html( template( _.extend(
{ id: panel.id },
panel.params
) ) );
}
}
});

api.ThemesPanel = api.Panel.extend(/** @lends wp.customize.ThemsPanel.prototype */{

/**
* Class wp.customize.ThemesPanel.
*
* Custom section for themes that displays without the customize preview.
*
* @constructs wp.customize.ThemesPanel
* @augments wp.customize.Panel
*
* @since 4.9.0
*
* @param {string} id - The ID for the panel.
* @param {Object} options - Options.
* @return {void}
*/
initialize: function( id, options ) {
var panel = this;
panel.installingThemes = [];
api.Panel.prototype.initialize.call( panel, id, options );
},

/**
* Determine whether a given theme can be switched to, or in general.
*
* @since 4.9.0
*
* @param {string} [slug] - Theme slug.
* @return {boolean} Whether the theme can be switched to.
*/
canSwitchTheme: function canSwitchTheme( slug ) {
if ( slug && slug === api.settings.theme.stylesheet ) {
return true;
}
return 'publish' === api.state( 'selectedChangesetStatus' ).get() && ( '' === api.state( 'changesetStatus' ).get() || 'auto-draft' === api.state( 'changesetStatus' ).get() );
},

/**
* Attach events.
*
* @since 4.9.0
* @return {void}
*/
attachEvents: function() {
var panel = this;

// Attach regular panel events.
api.Panel.prototype.attachEvents.apply( panel );

// Temporary since supplying SFTP credentials does not work yet. See #42184.
if ( api.settings.theme._canInstall && api.settings.theme._filesystemCredentialsNeeded ) {
panel.notifications.add( new api.Notification( 'theme_install_unavailable', {
message: api.l10n.themeInstallUnavailable,
type: 'info',
dismissible: true
} ) );
}

function toggleDisabledNotifications() {
if ( panel.canSwitchTheme() ) {
panel.notifications.remove( 'theme_switch_unavailable' );
} else {
panel.notifications.add( new api.Notification( 'theme_switch_unavailable', {
message: api.l10n.themePreviewUnavailable,
type: 'warning'
} ) );
}
}
toggleDisabledNotifications();
api.state( 'selectedChangesetStatus' ).bind( toggleDisabledNotifications );
api.state( 'changesetStatus' ).bind( toggleDisabledNotifications );

// Collapse panel to customize the current theme.
panel.contentContainer.on( 'click', '.customize-theme', function() {
panel.collapse();
});

// Toggle between filtering and browsing themes on mobile.
panel.contentContainer.on( 'click', '.customize-themes-section-title, .customize-themes-mobile-back', function() {
$( '.wp-full-overlay' ).toggleClass( 'showing-themes' );
});

// Install (and maybe preview) a theme.
panel.contentContainer.on( 'click', '.theme-install', function( event ) {
panel.installTheme( event );
});

// Update a theme. Theme cards have the class, the details modal has the id.
panel.contentContainer.on( 'click', '.update-theme, #update-theme', function( event ) {

// #update-theme is a link.
event.preventDefault();
event.stopPropagation();

panel.updateTheme( event );
});

// Delete a theme.
panel.contentContainer.on( 'click', '.delete-theme', function( event ) {
panel.deleteTheme( event );
});

_.bindAll( panel, 'installTheme', 'updateTheme' );
},

/**
* Update UI to reflect expanded state
*
* @since 4.9.0
*
* @param {boolean} expanded - Expanded state.
* @param {Object} args - Args.
* @param {boolean} args.unchanged - Whether or not the state changed.
* @param {Function} args.completeCallback - Callback to execute when the animation completes.
* @return {void}
*/
onChangeExpanded: function( expanded, args ) {
var panel = this, overlay, sections, hasExpandedSection = false;

// Expand/collapse the panel normally.
api.Panel.prototype.onChangeExpanded.apply( this, [ expanded, args ] );

// Immediately call the complete callback if there were no changes.
if ( args.unchanged ) {
if ( args.completeCallback ) {
args.completeCallback();
}
return;
}

overlay = panel.headContainer.closest( '.wp-full-overlay' );

if ( expanded ) {
overlay
.addClass( 'in-themes-panel' )
.delay( 200 ).find( '.customize-themes-full-container' ).addClass( 'animate' );

_.delay( function() {
overlay.addClass( 'themes-panel-expanded' );
}, 200 );

// Automatically open the first section (except on small screens), if one isn't already expanded.
if ( 600 < window.innerWidth ) {
sections = panel.sections();
_.each( sections, function( section ) {
if ( section.expanded() ) {
hasExpandedSection = true;
}
} );
if ( ! hasExpandedSection && sections.length > 0 ) {
sections[0].expand();
}
}
} else {
overlay
.removeClass( 'in-themes-panel themes-panel-expanded' )
.find( '.customize-themes-full-container' ).removeClass( 'animate' );
}
},

/**
* Install a theme via wp.updates.
*
* @since 4.9.0
*
* @param {jQuery.Event} event - Event.
* @return {jQuery.promise} Promise.
*/
installTheme: function( event ) {
var panel = this, preview, onInstallSuccess, slug = $( event.target ).data( 'slug' ), deferred = $.Deferred(), request;
preview = $( event.target ).hasClass( 'preview' );

// Temporary since supplying SFTP credentials does not work yet. See #42184.
if ( api.settings.theme._filesystemCredentialsNeeded ) {
deferred.reject({
errorCode: 'theme_install_unavailable'
});
return deferred.promise();
}

// Prevent loading a non-active theme preview when there is a drafted/scheduled changeset.
if ( ! panel.canSwitchTheme( slug ) ) {
deferred.reject({
errorCode: 'theme_switch_unavailable'
});
return deferred.promise();
}

// Theme is already being installed.
if ( _.contains( panel.installingThemes, slug ) ) {
deferred.reject({
errorCode: 'theme_already_installing'
});
return deferred.promise();
}

wp.updates.maybeRequestFilesystemCredentials( event );

onInstallSuccess = function( response ) {
var theme = false, themeControl;
if ( preview ) {
api.notifications.remove( 'theme_installing' );

panel.loadThemePreview( slug );

} else {
api.control.each( function( control ) {
if ( 'theme' === control.params.type && control.params.theme.id === response.slug ) {
theme = control.params.theme; // Used below to add theme control.
control.rerenderAsInstalled( true );
}
});

// Don't add the same theme more than once.
if ( ! theme || api.control.has( 'installed_theme_' + theme.id ) ) {
deferred.resolve( response );
return;
}

// Add theme control to installed section.
theme.type = 'installed';
themeControl = new api.controlConstructor.theme( 'installed_theme_' + theme.id, {
type: 'theme',
section: 'installed_themes',
theme: theme,
priority: 0 // Add all newly-installed themes to the top.
} );

api.control.add( themeControl );
api.control( themeControl.id ).container.trigger( 'render-screenshot' );

// Close the details modal if it's open to the installed theme.
api.section.each( function( section ) {
if ( 'themes' === section.params.type ) {
if ( theme.id === section.currentTheme ) { // Don't close the modal if the user has navigated elsewhere.
section.closeDetails();
}
}
});
}
deferred.resolve( response );
};

panel.installingThemes.push( slug ); // Note: we don't remove elements from installingThemes, since they shouldn't be installed again.
request = wp.updates.installTheme( {
slug: slug
} );

// Also preview the theme as the event is triggered on Install & Preview.
if ( preview ) {
api.notifications.add( new api.OverlayNotification( 'theme_installing', {
message: api.l10n.themeDownloading,
type: 'info',
loading: true
} ) );
}

request.done( onInstallSuccess );
request.fail( function() {
api.notifications.remove( 'theme_installing' );
} );

return deferred.promise();
},

/**
* Load theme preview.
*
* @since 4.9.0
*
* @param {string} themeId Theme ID.
* @return {jQuery.promise} Promise.
*/
loadThemePreview: function( themeId ) {
var panel = this, deferred = $.Deferred(), onceProcessingComplete, urlParser, queryParams;

// Prevent loading a non-active theme preview when there is a drafted/scheduled changeset.
if ( ! panel.canSwitchTheme( themeId ) ) {
deferred.reject({
errorCode: 'theme_switch_unavailable'
});
return deferred.promise();
}

urlParser = document.createElement( 'a' );
urlParser.href = location.href;
queryParams = _.extend(
api.utils.parseQueryString( urlParser.search.substr( 1 ) ),
{
theme: themeId,
changeset_uuid: api.settings.changeset.uuid,
'return': api.settings.url['return']
}
);

// Include autosaved param to load autosave revision without prompting user to restore it.
if ( ! api.state( 'saved' ).get() ) {
queryParams.customize_autosaved = 'on';
}

urlParser.search = $.param( queryParams );

// Update loading message. Everything else is handled by reloading the page.
api.notifications.add( new api.OverlayNotification( 'theme_previewing', {
message: api.l10n.themePreviewWait,
type: 'info',
loading: true
} ) );

onceProcessingComplete = function() {
var request;
if ( api.state( 'processing' ).get() > 0 ) {
return;
}

api.state( 'processing' ).unbind( onceProcessingComplete );

request = api.requestChangesetUpdate( {}, { autosave: true } );
request.done( function() {
deferred.resolve();
$( window ).off( 'beforeunload.customize-confirm' );
location.replace( urlParser.href );
} );
request.fail( function() {

// @todo Show notification regarding failure.
api.notifications.remove( 'theme_previewing' );

deferred.reject();
} );
};

if ( 0 === api.state( 'processing' ).get() ) {
onceProcessingComplete();
} else {
api.state( 'processing' ).bind( onceProcessingComplete );
}

return deferred.promise();
},

/**
* Update a theme via wp.updates.
*
* @since 4.9.0
*
* @param {jQuery.Event} event - Event.
* @return {void}
*/
updateTheme: function( event ) {
wp.updates.maybeRequestFilesystemCredentials( event );

$( document ).one( 'wp-theme-update-success', function( e, response ) {

// Rerender the control to reflect the update.
api.control.each( function( control ) {
if ( 'theme' === control.params.type && control.params.theme.id === response.slug ) {
control.params.theme.hasUpdate = false;
control.params.theme.version = response.newVersion;
setTimeout( function() {
control.rerenderAsInstalled( true );
}, 2000 );
}
});
} );

wp.updates.updateTheme( {
slug: $( event.target ).closest( '.notice' ).data( 'slug' )
} );
},

/**
* Delete a theme via wp.updates.
*
* @since 4.9.0
*
* @param {jQuery.Event} event - Event.
* @return {void}
*/
deleteTheme: function( event ) {
var theme, section;
theme = $( event.target ).data( 'slug' );
section = api.section( 'installed_themes' );

event.preventDefault();

// Temporary since supplying SFTP credentials does not work yet. See #42184.
if ( api.settings.theme._filesystemCredentialsNeeded ) {
return;
}

// Confirmation dialog for deleting a theme.
if ( ! window.confirm( api.settings.l10n.confirmDeleteTheme ) ) {
return;
}

wp.updates.maybeRequestFilesystemCredentials( event );

$( document ).one( 'wp-theme-delete-success', function() {
var control = api.control( 'installed_theme_' + theme );

// Remove theme control.
control.container.remove();
api.control.remove( control.id );

// Update installed count.
section.loaded = section.loaded - 1;
section.updateCount();

// Rerender any other theme controls as uninstalled.
api.control.each( function( control ) {
if ( 'theme' === control.params.type && control.params.theme.id === theme ) {
control.rerenderAsInstalled( false );
}
});
} );

wp.updates.deleteTheme( {
slug: theme
} );

// Close modal and focus the section.
section.closeDetails();
section.focus();
}
});

api.Control = api.Class.extend(/** @lends wp.customize.Control.prototype */{
defaultActiveArguments: { duration: 'fast', completeCallback: $.noop },

/**
* Default params.
*
* @since 4.9.0
* @var {object}
*/
defaults: {
label: '',
description: '',
active: true,
priority: 10
},

/**
* A Customizer Control.
*
* A control provides a UI element that allows a user to modify a Customizer Setting.
*
* @see PHP class WP_Customize_Control.
*
* @constructs wp.customize.Control
* @augments wp.customize.Class
*
* @borrows wp.customize~focus as this#focus
* @borrows wp.customize~Container#activate as this#activate
* @borrows wp.customize~Container#deactivate as this#deactivate
* @borrows wp.customize~Container#_toggleActive as this#_toggleActive
*
* @param {string} id - Unique identifier for the control instance.
* @param {Object} options - Options hash for the control instance.
* @param {Object} options.type - Type of control (e.g. text, radio, dropdown-pages, etc.)
* @param {string} [options.content] - The HTML content for the control or at least its container. This should normally be left blank and instead supplying a templateId.
* @param {string} [options.templateId] - Template ID for control's content.
* @param {string} [options.priority=10] - Order of priority to show the control within the section.
* @param {string} [options.active=true] - Whether the control is active.
* @param {string} options.section - The ID of the section the control belongs to.
* @param {mixed} [options.setting] - The ID of the main setting or an instance of this setting.
* @param {mixed} options.settings - An object with keys (e.g. default) that maps to setting IDs or Setting/Value objects, or an array of setting IDs or Setting/Value objects.
* @param {mixed} options.settings.default - The ID of the setting the control relates to.
* @param {string} options.settings.data - @todo Is this used?
* @param {string} options.label - Label.
* @param {string} options.description - Description.
* @param {number} [options.instanceNumber] - Order in which this instance was created in relation to other instances.
* @param {Object} [options.params] - Deprecated wrapper for the above properties.
* @return {void}
*/
initialize: function( id, options ) {
var control = this, deferredSettingIds = [], settings, gatherSettings;

control.params = _.extend(
{},
control.defaults,
control.params || {}, // In case subclass already defines.
options.params || options || {} // The options.params property is deprecated, but it is checked first for back-compat.
);

if ( ! api.Control.instanceCounter ) {
api.Control.instanceCounter = 0;
}
api.Control.instanceCounter++;
if ( ! control.params.instanceNumber ) {
control.params.instanceNumber = api.Control.instanceCounter;
}

// Look up the type if one was not supplied.
if ( ! control.params.type ) {
_.find( api.controlConstructor, function( Constructor, type ) {
if ( Constructor === control.constructor ) {
control.params.type = type;
return true;
}
return false;
} );
}

if ( ! control.params.content ) {
control.params.content = $( '<li></li>', {
id: 'customize-control-' + id.replace( /]/g, '' ).replace( /\[/g, '-' ),
'class': 'customize-control customize-control-' + control.params.type
} );
}

control.id = id;
control.selector = '#customize-control-' + id.replace( /\]/g, '' ).replace( /\[/g, '-' ); // Deprecated, likely dead code from time before #28709.
if ( control.params.content ) {
control.container = $( control.params.content );
} else {
control.container = $( control.selector ); // Likely dead, per above. See #28709.
}

if ( control.params.templateId ) {
control.templateSelector = control.params.templateId;
} else {
control.templateSelector = 'customize-control-' + control.params.type + '-content';
}

control.deferred = _.extend( control.deferred || {}, {
embedded: new $.Deferred()
} );
control.section = new api.Value();
control.priority = new api.Value();
control.active = new api.Value();
control.activeArgumentsQueue = [];
control.notifications = new api.Notifications({
alt: control.altNotice
});

control.elements = [];

control.active.bind( function ( active ) {
var args = control.activeArgumentsQueue.shift();
args = $.extend( {}, control.defaultActiveArguments, args );
control.onChangeActive( active, args );
} );

control.section.set( control.params.section );
control.priority.set( isNaN( control.params.priority ) ? 10 : control.params.priority );
control.active.set( control.params.active );

api.utils.bubbleChildValueChanges( control, [ 'section', 'priority', 'active' ] );

control.settings = {};

settings = {};
if ( control.params.setting ) {
settings['default'] = control.params.setting;
}
_.extend( settings, control.params.settings );

// Note: Settings can be an array or an object, with values being either setting IDs or Setting (or Value) objects.
_.each( settings, function( value, key ) {
var setting;
if ( _.isObject( value ) && _.isFunction( value.extended ) && value.extended( api.Value ) ) {
control.settings[ key ] = value;
} else if ( _.isString( value ) ) {
setting = api( value );
if ( setting ) {
control.settings[ key ] = setting;
} else {
deferredSettingIds.push( value );
}
}
} );

gatherSettings = function() {

// Fill-in all resolved settings.
_.each( settings, function ( settingId, key ) {
if ( ! control.settings[ key ] && _.isString( settingId ) ) {
control.settings[ key ] = api( settingId );
}
} );

// Make sure settings passed as array gets associated with default.
if ( control.settings[0] && ! control.settings['default'] ) {
control.settings['default'] = control.settings[0];
}

// Identify the main setting.
control.setting = control.settings['default'] || null;

control.linkElements(); // Link initial elements present in server-rendered content.
control.embed();
};

if ( 0 === deferredSettingIds.length ) {
gatherSettings();
} else {
api.apply( api, deferredSettingIds.concat( gatherSettings ) );
}

// After the control is embedded on the page, invoke the "ready" method.
control.deferred.embedded.done( function () {
control.linkElements(); // Link any additional elements after template is rendered by renderContent().
control.setupNotifications();
control.ready();
});
},

/**
* Link elements between settings and inputs.
*
* @since 4.7.0
* @access public
*
* @return {void}
*/
linkElements: function () {
var control = this, nodes, radios, element;

nodes = control.container.find( '[data-customize-setting-link], [data-customize-setting-key-link]' );
radios = {};

nodes.each( function () {
var node = $( this ), name, setting;

if ( node.data( 'customizeSettingLinked' ) ) {
return;
}
node.data( 'customizeSettingLinked', true ); // Prevent re-linking element.

if ( node.is( ':radio' ) ) {
name = node.prop( 'name' );
if ( radios[name] ) {
return;
}

radios[name] = true;
node = nodes.filter( '[name="' + name + '"]' );
}

// Let link by default refer to setting ID. If it doesn't exist, fallback to looking up by setting key.
if ( node.data( 'customizeSettingLink' ) ) {
setting = api( node.data( 'customizeSettingLink' ) );
} else if ( node.data( 'customizeSettingKeyLink' ) ) {
setting = control.settings[ node.data( 'customizeSettingKeyLink' ) ];
}

if ( setting ) {
element = new api.Element( node );
control.elements.push( element );
element.sync( setting );
element.set( setting() );
}
} );
},

/**
* Embed the control into the page.
*/
embed: function () {
var control = this,
inject;

// Watch for changes to the section state.
inject = function ( sectionId ) {
var parentContainer;
if ( ! sectionId ) { // @todo Allow a control to be embedded without a section, for instance a control embedded in the front end.
return;
}
// Wait for the section to be registered.
api.section( sectionId, function ( section ) {
// Wait for the section to be ready/initialized.
section.deferred.embedded.done( function () {
parentContainer = ( section.contentContainer.is( 'ul' ) ) ? section.contentContainer : section.contentContainer.find( 'ul:first' );
if ( ! control.container.parent().is( parentContainer ) ) {
parentContainer.append( control.container );
}
control.renderContent();
control.deferred.embedded.resolve();
});
});
};
control.section.bind( inject );
inject( control.section.get() );
},

/**
* Triggered when the control's markup has been injected into the DOM.
*
* @return {void}
*/
ready: function() {
var control = this, newItem;
if ( 'dropdown-pages' === control.params.type && control.params.allow_addition ) {
newItem = control.container.find( '.new-content-item-wrapper' );
newItem.hide(); // Hide in JS to preserve flex display when showing.
control.container.on( 'click', '.add-new-toggle', function( e ) {
$( e.currentTarget ).slideUp( 180 );
newItem.slideDown( 180 );
newItem.find( '.create-item-input' ).focus();
});
control.container.on( 'click', '.add-content', function() {
control.addNewPage();
});
control.container.on( 'keydown', '.create-item-input', function( e ) {
if ( 13 === e.which ) { // Enter.
control.addNewPage();
}
});
}
},

/**
* Get the element inside of a control's container that contains the validation error message.
*
* Control subclasses may override this to return the proper container to render notifications into.
* Injects the notification container for existing controls that lack the necessary container,
* including special handling for nav menu items and widgets.
*
* @since 4.6.0
* @return {jQuery} Setting validation message element.
*/
getNotificationsContainerElement: function() {
var control = this, controlTitle, notificationsContainer;

notificationsContainer = control.container.find( '.customize-control-notifications-container:first' );
if ( notificationsContainer.length ) {
return notificationsContainer;
}

notificationsContainer = $( '<div class="customize-control-notifications-container"></div>' );

if ( control.container.hasClass( 'customize-control-nav_menu_item' ) ) {
control.container.find( '.menu-item-settings:first' ).prepend( notificationsContainer );
} else if ( control.container.hasClass( 'customize-control-widget_form' ) ) {
control.container.find( '.widget-inside:first' ).prepend( notificationsContainer );
} else {
controlTitle = control.container.find( '.customize-control-title' );
if ( controlTitle.length ) {
controlTitle.after( notificationsContainer );
} else {
control.container.prepend( notificationsContainer );
}
}
return notificationsContainer;
},

/**
* Set up notifications.
*
* @since 4.9.0
* @return {void}
*/
setupNotifications: function() {
var control = this, renderNotificationsIfVisible, onSectionAssigned;

// Add setting notifications to the control notification.
_.each( control.settings, function( setting ) {
if ( ! setting.notifications ) {
return;
}
setting.notifications.bind( 'add', function( settingNotification ) {
var params = _.extend(
{},
settingNotification,
{
setting: setting.id
}
);
control.notifications.add( new api.Notification( setting.id + ':' + settingNotification.code, params ) );
} );
setting.notifications.bind( 'remove', function( settingNotification ) {
control.notifications.remove( setting.id + ':' + settingNotification.code );
} );
} );

renderNotificationsIfVisible = function() {
var sectionId = control.section();
if ( ! sectionId || ( api.section.has( sectionId ) && api.section( sectionId ).expanded() ) ) {
control.notifications.render();
}
};

control.notifications.bind( 'rendered', function() {
var notifications = control.notifications.get();
control.container.toggleClass( 'has-notifications', 0 !== notifications.length );
control.container.toggleClass( 'has-error', 0 !== _.where( notifications, { type: 'error' } ).length );
} );

onSectionAssigned = function( newSectionId, oldSectionId ) {
if ( oldSectionId && api.section.has( oldSectionId ) ) {
api.section( oldSectionId ).expanded.unbind( renderNotificationsIfVisible );
}
if ( newSectionId ) {
api.section( newSectionId, function( section ) {
section.expanded.bind( renderNotificationsIfVisible );
renderNotificationsIfVisible();
});
}
};

control.section.bind( onSectionAssigned );
onSectionAssigned( control.section.get() );
control.notifications.bind( 'change', _.debounce( renderNotificationsIfVisible ) );
},

/**
* Render notifications.
*
* Renders the `control.notifications` into the control's container.
* Control subclasses may override this method to do their own handling
* of rendering notifications.
*
* @deprecated in favor of `control.notifications.render()`
* @since 4.6.0
* @this {wp.customize.Control}
*/
renderNotifications: function() {
var control = this, container, notifications, hasError = false;

if ( 'undefined' !== typeof console && console.warn ) {
console.warn( '[DEPRECATED] wp.customize.Control.prototype.renderNotifications() is deprecated in favor of instantiating a wp.customize.Notifications and calling its render() method.' );
}

container = control.getNotificationsContainerElement();
if ( ! container || ! container.length ) {
return;
}
notifications = [];
control.notifications.each( function( notification ) {
notifications.push( notification );
if ( 'error' === notification.type ) {
hasError = true;
}
} );

if ( 0 === notifications.length ) {
container.stop().slideUp( 'fast' );
} else {
container.stop().slideDown( 'fast', null, function() {
$( this ).css( 'height', 'auto' );
} );
}

if ( ! control.notificationsTemplate ) {
control.notificationsTemplate = wp.template( 'customize-control-notifications' );
}

control.container.toggleClass( 'has-notifications', 0 !== notifications.length );
control.container.toggleClass( 'has-error', hasError );
container.empty().append(
control.notificationsTemplate( { notifications: notifications, altNotice: Boolean( control.altNotice ) } ).trim()
);
},

/**
* Normal controls do not expand, so just expand its parent
*
* @param {Object} [params]
*/
expand: function ( params ) {
api.section( this.section() ).expand( params );
},

/*
* Documented using @borrows in the constructor.
*/
focus: focus,

/**
* Update UI in response to a change in the control's active state.
* This does not change the active state, it merely handles the behavior
* for when it does change.
*
* @since 4.1.0
*
* @param {boolean} active
* @param {Object} args
* @param {number} args.duration
* @param {Function} args.completeCallback
*/
onChangeActive: function ( active, args ) {
if ( args.unchanged ) {
if ( args.completeCallback ) {
args.completeCallback();
}
return;
}

if ( ! $.contains( document, this.container[0] ) ) {
// jQuery.fn.slideUp is not hiding an element if it is not in the DOM.
this.container.toggle( active );
if ( args.completeCallback ) {
args.completeCallback();
}
} else if ( active ) {
this.container.slideDown( args.duration, args.completeCallback );
} else {
this.container.slideUp( args.duration, args.completeCallback );
}
},

/**
* @deprecated 4.1.0 Use this.onChangeActive() instead.
*/
toggle: function ( active ) {
return this.onChangeActive( active, this.defaultActiveArguments );
},

/*
* Documented using @borrows in the constructor
*/
activate: Container.prototype.activate,

/*
* Documented using @borrows in the constructor
*/
deactivate: Container.prototype.deactivate,

/*
* Documented using @borrows in the constructor
*/
_toggleActive: Container.prototype._toggleActive,

// @todo This function appears to be dead code and can be removed.
dropdownInit: function() {
var control = this,
statuses = this.container.find('.dropdown-status'),
params = this.params,
toggleFreeze = false,
update = function( to ) {
if ( 'string' === typeof to && params.statuses && params.statuses[ to ] ) {
statuses.html( params.statuses[ to ] ).show();
} else {
statuses.hide();
}
};

// Support the .dropdown class to open/close complex elements.
this.container.on( 'click keydown', '.dropdown', function( event ) {
if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
return;
}

event.preventDefault();

if ( ! toggleFreeze ) {
control.container.toggleClass( 'open' );
}

if ( control.container.hasClass( 'open' ) ) {
control.container.parent().parent().find( 'li.library-selected' ).focus();
}

// Don't want to fire focus and click at same time.
toggleFreeze = true;
setTimeout(function () {
toggleFreeze = false;
}, 400);
});

this.setting.bind( update );
update( this.setting() );
},

/**
* Render the control from its JS template, if it exists.
*
* The control's container must already exist in the DOM.
*
* @since 4.1.0
*/
renderContent: function () {
var control = this, template, standardTypes, templateId, sectionId;

standardTypes = [
'button',
'checkbox',
'date',
'datetime-local',
'email',
'month',
'number',
'password',
'radio',
'range',
'search',
'select',
'tel',
'time',
'text',
'textarea',
'week',
'url'
];

templateId = control.templateSelector;

// Use default content template when a standard HTML type is used,
// there isn't a more specific template existing, and the control container is empty.
if ( templateId === 'customize-control-' + control.params.type + '-content' &&
_.contains( standardTypes, control.params.type ) &&
! document.getElementById( 'tmpl-' + templateId ) &&
0 === control.container.children().length )
{
templateId = 'customize-control-default-content';
}

// Replace the container element's content with the control.
if ( document.getElementById( 'tmpl-' + templateId ) ) {
template = wp.template( templateId );
if ( template && control.container ) {
control.container.html( template( control.params ) );
}
}

// Re-render notifications after content has been re-rendered.
control.notifications.container = control.getNotificationsContainerElement();
sectionId = control.section();
if ( ! sectionId || ( api.section.has( sectionId ) && api.section( sectionId ).expanded() ) ) {
control.notifications.render();
}
},

/**
* Add a new page to a dropdown-pages control reusing menus code for this.
*
* @since 4.7.0
* @access private
*
* @return {void}
*/
addNewPage: function () {
var control = this, promise, toggle, container, input, title, select;

if ( 'dropdown-pages' !== control.params.type || ! control.params.allow_addition || ! api.Menus ) {
return;
}

toggle = control.container.find( '.add-new-toggle' );
container = control.container.find( '.new-content-item-wrapper' );
input = control.container.find( '.create-item-input' );
title = input.val();
select = control.container.find( 'select' );

if ( ! title ) {
input.addClass( 'invalid' );
return;
}

input.removeClass( 'invalid' );
input.attr( 'disabled', 'disabled' );

// The menus functions add the page, publish when appropriate,
// and also add the new page to the dropdown-pages controls.
promise = api.Menus.insertAutoDraftPost( {
post_title: title,
post_type: 'page'
} );
promise.done( function( data ) {
var availableItem, $content, itemTemplate;

// Prepare the new page as an available menu item.
// See api.Menus.submitNew().
availableItem = new api.Menus.AvailableItemModel( {
'id': 'post-' + data.post_id, // Used for available menu item Backbone models.
'title': title,
'type': 'post_type',
'type_label': api.Menus.data.l10n.page_label,
'object': 'page',
'object_id': data.post_id,
'url': data.url
} );

// Add the new item to the list of available menu items.
api.Menus.availableMenuItemsPanel.collection.add( availableItem );
$content = $( '#available-menu-items-post_type-page' ).find( '.available-menu-items-list' );
itemTemplate = wp.template( 'available-menu-item' );
$content.prepend( itemTemplate( availableItem.attributes ) );

// Focus the select control.
select.focus();
control.setting.set( String( data.post_id ) ); // Triggers a preview refresh and updates the setting.

// Reset the create page form.
container.slideUp( 180 );
toggle.slideDown( 180 );
} );
promise.always( function() {
input.val( '' ).removeAttr( 'disabled' );
} );
}
});

/**
* A colorpicker control.
*
* @class wp.customize.ColorControl
* @augments wp.customize.Control
*/
api.ColorControl = api.Control.extend(/** @lends wp.customize.ColorControl.prototype */{
ready: function() {
var control = this,
isHueSlider = this.params.mode === 'hue',
updating = false,
picker;

if ( isHueSlider ) {
picker = this.container.find( '.color-picker-hue' );
picker.val( control.setting() ).wpColorPicker({
change: function( event, ui ) {
updating = true;
control.setting( ui.color.h() );
updating = false;
}
});
} else {
picker = this.container.find( '.color-picker-hex' );
picker.val( control.setting() ).wpColorPicker({
change: function() {
updating = true;
control.setting.set( picker.wpColorPicker( 'color' ) );
updating = false;
},
clear: function() {
updating = true;
control.setting.set( '' );
updating = false;
}
});
}

control.setting.bind( function ( value ) {
// Bail if the update came from the control itself.
if ( updating ) {
return;
}
picker.val( value );
picker.wpColorPicker( 'color', value );
} );

// Collapse color picker when hitting Esc instead of collapsing the current section.
control.container.on( 'keydown', function( event ) {
var pickerContainer;
if ( 27 !== event.which ) { // Esc.
return;
}
pickerContainer = control.container.find( '.wp-picker-container' );
if ( pickerContainer.hasClass( 'wp-picker-active' ) ) {
picker.wpColorPicker( 'close' );
control.container.find( '.wp-color-result' ).focus();
event.stopPropagation(); // Prevent section from being collapsed.
}
} );
}
});

/**
* A control that implements the media modal.
*
* @class wp.customize.MediaControl
* @augments wp.customize.Control
*/
api.MediaControl = api.Control.extend(/** @lends wp.customize.MediaControl.prototype */{

/**
* When the control's DOM structure is ready,
* set up internal event bindings.
*/
ready: function() {
var control = this;
// Shortcut so that we don't have to use _.bind every time we add a callback.
_.bindAll( control, 'restoreDefault', 'removeFile', 'openFrame', 'select', 'pausePlayer' );

// Bind events, with delegation to facilitate re-rendering.
control.container.on( 'click keydown', '.upload-button', control.openFrame );
control.container.on( 'click keydown', '.upload-button', control.pausePlayer );
control.container.on( 'click keydown', '.thumbnail-image img', control.openFrame );
control.container.on( 'click keydown', '.default-button', control.restoreDefault );
control.container.on( 'click keydown', '.remove-button', control.pausePlayer );
control.container.on( 'click keydown', '.remove-button', control.removeFile );
control.container.on( 'click keydown', '.remove-button', control.cleanupPlayer );

// Resize the player controls when it becomes visible (ie when section is expanded).
api.section( control.section() ).container
.on( 'expanded', function() {
if ( control.player ) {
control.player.setControlsSize();
}
})
.on( 'collapsed', function() {
control.pausePlayer();
});

/**
* Set attachment data and render content.
*
* Note that BackgroundImage.prototype.ready applies this ready method
* to itself. Since BackgroundImage is an UploadControl, the value
* is the attachment URL instead of the attachment ID. In this case
* we skip fetching the attachment data because we have no ID available,
* and it is the responsibility of the UploadControl to set the control's
* attachmentData before calling the renderContent method.
*
* @param {number|string} value Attachment
*/
function setAttachmentDataAndRenderContent( value ) {
var hasAttachmentData = $.Deferred();

if ( control.extended( api.UploadControl ) ) {
hasAttachmentData.resolve();
} else {
value = parseInt( value, 10 );
if ( _.isNaN( value ) || value <= 0 ) {
delete control.params.attachment;
hasAttachmentData.resolve();
} else if ( control.params.attachment && control.params.attachment.id === value ) {
hasAttachmentData.resolve();
}
}

// Fetch the attachment data.
if ( 'pending' === hasAttachmentData.state() ) {
wp.media.attachment( value ).fetch().done( function() {
control.params.attachment = this.attributes;
hasAttachmentData.resolve();

// Send attachment information to the preview for possible use in `postMessage` transport.
wp.customize.previewer.send( control.setting.id + '-attachment-data', this.attributes );
} );
}

hasAttachmentData.done( function() {
control.renderContent();
} );
}

// Ensure attachment data is initially set (for dynamically-instantiated controls).
setAttachmentDataAndRenderContent( control.setting() );

// Update the attachment data and re-render the control when the setting changes.
control.setting.bind( setAttachmentDataAndRenderContent );
},

pausePlayer: function () {
this.player && this.player.pause();
},

cleanupPlayer: function () {
this.player && wp.media.mixin.removePlayer( this.player );
},

/**
* Open the media modal.
*/
openFrame: function( event ) {
if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
return;
}

event.preventDefault();

if ( ! this.frame ) {
this.initFrame();
}

this.frame.open();
},

/**
* Create a media modal select frame, and store it so the instance can be reused when needed.
*/
initFrame: function() {
this.frame = wp.media({
button: {
text: this.params.button_labels.frame_button
},
states: [
new wp.media.controller.Library({
title: this.params.button_labels.frame_title,
library: wp.media.query({ type: this.params.mime_type }),
multiple: false,
date: false
})
]
});

// When a file is selected, run a callback.
this.frame.on( 'select', this.select );
},

/**
* Callback handler for when an attachment is selected in the media modal.
* Gets the selected image information, and sets it within the control.
*/
select: function() {
// Get the attachment from the modal frame.
var node,
attachment = this.frame.state().get( 'selection' ).first().toJSON(),
mejsSettings = window._wpmejsSettings || {};

this.params.attachment = attachment;

// Set the Customizer setting; the callback takes care of rendering.
this.setting( attachment.id );
node = this.container.find( 'audio, video' ).get(0);

// Initialize audio/video previews.
if ( node ) {
this.player = new MediaElementPlayer( node, mejsSettings );
} else {
this.cleanupPlayer();
}
},

/**
* Reset the setting to the default value.
*/
restoreDefault: function( event ) {
if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
return;
}
event.preventDefault();

this.params.attachment = this.params.defaultAttachment;
this.setting( this.params.defaultAttachment.url );
},

/**
* Called when the "Remove" link is clicked. Empties the setting.
*
* @param {Object} event jQuery Event object
*/
removeFile: function( event ) {
if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
return;
}
event.preventDefault();

this.params.attachment = {};
this.setting( '' );
this.renderContent(); // Not bound to setting change when emptying.
}
});

/**
* An upload control, which utilizes the media modal.
*
* @class wp.customize.UploadControl
* @augments wp.customize.MediaControl
*/
api.UploadControl = api.MediaControl.extend(/** @lends wp.customize.UploadControl.prototype */{

/**
* Callback handler for when an attachment is selected in the media modal.
* Gets the selected image information, and sets it within the control.
*/
select: function() {
// Get the attachment from the modal frame.
var node,
attachment = this.frame.state().get( 'selection' ).first().toJSON(),
mejsSettings = window._wpmejsSettings || {};

this.params.attachment = attachment;

// Set the Customizer setting; the callback takes care of rendering.
this.setting( attachment.url );
node = this.container.find( 'audio, video' ).get(0);

// Initialize audio/video previews.
if ( node ) {
this.player = new MediaElementPlayer( node, mejsSettings );
} else {
this.cleanupPlayer();
}
},

// @deprecated
success: function() {},

// @deprecated
removerVisibility: function() {}
});

/**
* A control for uploading images.
*
* This control no longer needs to do anything more
* than what the upload control does in JS.
*
* @class wp.customize.ImageControl
* @augments wp.customize.UploadControl
*/
api.ImageControl = api.UploadControl.extend(/** @lends wp.customize.ImageControl.prototype */{
// @deprecated
thumbnailSrc: function() {}
});

/**
* A control for uploading background images.
*
* @class wp.customize.BackgroundControl
* @augments wp.customize.UploadControl
*/
api.BackgroundControl = api.UploadControl.extend(/** @lends wp.customize.BackgroundControl.prototype */{

/**
* When the control's DOM structure is ready,
* set up internal event bindings.
*/
ready: function() {
api.UploadControl.prototype.ready.apply( this, arguments );
},

/**
* Callback handler for when an attachment is selected in the media modal.
* Does an additional Ajax request for setting the background context.
*/
select: function() {
api.UploadControl.prototype.select.apply( this, arguments );

wp.ajax.post( 'custom-background-add', {
nonce: _wpCustomizeBackground.nonces.add,
wp_customize: 'on',
customize_theme: api.settings.theme.stylesheet,
attachment_id: this.params.attachment.id
} );
}
});

/**
* A control for positioning a background image.
*
* @since 4.7.0
*
* @class wp.customize.BackgroundPositionControl
* @augments wp.customize.Control
*/
api.BackgroundPositionControl = api.Control.extend(/** @lends wp.customize.BackgroundPositionControl.prototype */{

/**
* Set up control UI once embedded in DOM and settings are created.
*
* @since 4.7.0
* @access public
*/
ready: function() {
var control = this, updateRadios;

control.container.on( 'change', 'input[name="background-position"]', function() {
var position = $( this ).val().split( ' ' );
control.settings.x( position[0] );
control.settings.y( position[1] );
} );

updateRadios = _.debounce( function() {
var x, y, radioInput, inputValue;
x = control.settings.x.get();
y = control.settings.y.get();
inputValue = String( x ) + ' ' + String( y );
radioInput = control.container.find( 'input[name="background-position"][value="' + inputValue + '"]' );
radioInput.trigger( 'click' );
} );
control.settings.x.bind( updateRadios );
control.settings.y.bind( updateRadios );

updateRadios(); // Set initial UI.
}
} );

/**
* A control for selecting and cropping an image.
*
* @class wp.customize.CroppedImageControl
* @augments wp.customize.MediaControl
*/
api.CroppedImageControl = api.MediaControl.extend(/** @lends wp.customize.CroppedImageControl.prototype */{

/**
* Open the media modal to the library state.
*/
openFrame: function( event ) {
if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
return;
}

this.initFrame();
this.frame.setState( 'library' ).open();
},

/**
* Create a media modal select frame, and store it so the instance can be reused when needed.
*/
initFrame: function() {
var l10n = _wpMediaViewsL10n;

this.frame = wp.media({
button: {
text: l10n.select,
close: false
},
states: [
new wp.media.controller.Library({
title: this.params.button_labels.frame_title,
library: wp.media.query({ type: 'image' }),
multiple: false,
date: false,
priority: 20,
suggestedWidth: this.params.width,
suggestedHeight: this.params.height
}),
new wp.media.controller.CustomizeImageCropper({
imgSelectOptions: this.calculateImageSelectOptions,
control: this
})
]
});

this.frame.on( 'select', this.onSelect, this );
this.frame.on( 'cropped', this.onCropped, this );
this.frame.on( 'skippedcrop', this.onSkippedCrop, this );
},

/**
* After an image is selected in the media modal, switch to the cropper
* state if the image isn't the right size.
*/
onSelect: function() {
var attachment = this.frame.state().get( 'selection' ).first().toJSON();

if ( this.params.width === attachment.width && this.params.height === attachment.height && ! this.params.flex_width && ! this.params.flex_height ) {
this.setImageFromAttachment( attachment );
this.frame.close();
} else {
this.frame.setState( 'cropper' );
}
},

/**
* After the image has been cropped, apply the cropped image data to the setting.
*
* @param {Object} croppedImage Cropped attachment data.
*/
onCropped: function( croppedImage ) {
this.setImageFromAttachment( croppedImage );
},

/**
* Returns a set of options, computed from the attached image data and
* control-specific data, to be fed to the imgAreaSelect plugin in
* wp.media.view.Cropper.
*
* @param {wp.media.model.Attachment} attachment
* @param {wp.media.controller.Cropper} controller
* @return {Object} Options
*/
calculateImageSelectOptions: function( attachment, controller ) {
var control = controller.get( 'control' ),
flexWidth = !! parseInt( control.params.flex_width, 10 ),
flexHeight = !! parseInt( control.params.flex_height, 10 ),
realWidth = attachment.get( 'width' ),
realHeight = attachment.get( 'height' ),
xInit = parseInt( control.params.width, 10 ),
yInit = parseInt( control.params.height, 10 ),
requiredRatio = xInit / yInit,
realRatio = realWidth / realHeight,
xImg = xInit,
yImg = yInit,
x1, y1, imgSelectOptions;

controller.set( 'hasRequiredAspectRatio', control.hasRequiredAspectRatio( requiredRatio, realRatio ) );
controller.set( 'suggestedCropSize', { width: realWidth, height: realHeight, x1: 0, y1: 0, x2: xInit, y2: yInit } );
controller.set( 'canSkipCrop', ! control.mustBeCropped( flexWidth, flexHeight, xInit, yInit, realWidth, realHeight ) );

if ( realRatio > requiredRatio ) {
yInit = realHeight;
xInit = yInit * requiredRatio;
} else {
xInit = realWidth;
yInit = xInit / requiredRatio;
}

x1 = ( realWidth - xInit ) / 2;
y1 = ( realHeight - yInit ) / 2;

imgSelectOptions = {
handles: true,
keys: true,
instance: true,
persistent: true,
imageWidth: realWidth,
imageHeight: realHeight,
minWidth: xImg > xInit ? xInit : xImg,
minHeight: yImg > yInit ? yInit : yImg,
x1: x1,
y1: y1,
x2: xInit + x1,
y2: yInit + y1
};

if ( flexHeight === false && flexWidth === false ) {
imgSelectOptions.aspectRatio = xInit + ':' + yInit;
}

if ( true === flexHeight ) {
delete imgSelectOptions.minHeight;
imgSelectOptions.maxWidth = realWidth;
}

if ( true === flexWidth ) {
delete imgSelectOptions.minWidth;
imgSelectOptions.maxHeight = realHeight;
}

return imgSelectOptions;
},

/**
* Return whether the image must be cropped, based on required dimensions.
*
* @param {boolean} flexW Width is flexible.
* @param {boolean} flexH Height is flexible.
* @param {number} dstW Required width.
* @param {number} dstH Required height.
* @param {number} imgW Provided image's width.
* @param {number} imgH Provided image's height.
* @return {boolean} Whether cropping is required.
*/
mustBeCropped: function( flexW, flexH, dstW, dstH, imgW, imgH ) {
if ( true === flexW && true === flexH ) {
return false;
}

if ( true === flexW && dstH === imgH ) {
return false;
}

if ( true === flexH && dstW === imgW ) {
return false;
}

if ( dstW === imgW && dstH === imgH ) {
return false;
}

if ( imgW <= dstW ) {
return false;
}

return true;
},

/**
* Check if the image's aspect ratio essentially matches the required aspect ratio.
*
* Floating point precision is low, so this allows a small tolerance. This
* tolerance allows for images over 100,000 px on either side to still trigger
* the cropping flow.
*
* @param {number} requiredRatio Required image ratio.
* @param {number} realRatio Provided image ratio.
* @return {boolean} Whether the image has the required aspect ratio.
*/
hasRequiredAspectRatio: function ( requiredRatio, realRatio ) {
if ( Math.abs( requiredRatio - realRatio ) < 0.000001 ) {
return true;
}

return false;
},

/**
* If cropping was skipped, apply the image data directly to the setting.
*/
onSkippedCrop: function() {
var attachment = this.frame.state().get( 'selection' ).first().toJSON();
this.setImageFromAttachment( attachment );
},

/**
* Updates the setting and re-renders the control UI.
*
* @param {Object} attachment
*/
setImageFromAttachment: function( attachment ) {
this.params.attachment = attachment;

// Set the Customizer setting; the callback takes care of rendering.
this.setting( attachment.id );
}
});

/**
* A control for selecting and cropping Site Icons.
*
* @class wp.customize.SiteIconControl
* @augments wp.customize.CroppedImageControl
*/
api.SiteIconControl = api.CroppedImageControl.extend(/** @lends wp.customize.SiteIconControl.prototype */{

/**
* Create a media modal select frame, and store it so the instance can be reused when needed.
*/
initFrame: function() {
var l10n = _wpMediaViewsL10n;

this.frame = wp.media({
button: {
text: l10n.select,
close: false
},
states: [
new wp.media.controller.Library({
title: this.params.button_labels.frame_title,
library: wp.media.query({ type: 'image' }),
multiple: false,
date: false,
priority: 20,
suggestedWidth: this.params.width,
suggestedHeight: this.params.height
}),
new wp.media.controller.SiteIconCropper({
imgSelectOptions: this.calculateImageSelectOptions,
control: this
})
]
});

this.frame.on( 'select', this.onSelect, this );
this.frame.on( 'cropped', this.onCropped, this );
this.frame.on( 'skippedcrop', this.onSkippedCrop, this );
},

/**
* After an image is selected in the media modal, switch to the cropper
* state if the image isn't the right size.
*/
onSelect: function() {
var attachment = this.frame.state().get( 'selection' ).first().toJSON(),
controller = this;

if ( this.params.width === attachment.width && this.params.height === attachment.height && ! this.params.flex_width && ! this.params.flex_height ) {
wp.ajax.post( 'crop-image', {
nonce: attachment.nonces.edit,
id: attachment.id,
context: 'site-icon',
cropDetails: {
x1: 0,
y1: 0,
width: this.params.width,
height: this.params.height,
dst_width: this.params.width,
dst_height: this.params.height
}
} ).done( function( croppedImage ) {
controller.setImageFromAttachment( croppedImage );
controller.frame.close();
} ).fail( function() {
controller.frame.trigger('content:error:crop');
} );
} else {
this.frame.setState( 'cropper' );
}
},

/**
* Updates the setting and re-renders the control UI.
*
* @param {Object} attachment
*/
setImageFromAttachment: function( attachment ) {
var sizes = [ 'site_icon-32', 'thumbnail', 'full' ], link,
icon;

_.each( sizes, function( size ) {
if ( ! icon && ! _.isUndefined ( attachment.sizes[ size ] ) ) {
icon = attachment.sizes[ size ];
}
} );

this.params.attachment = attachment;

// Set the Customizer setting; the callback takes care of rendering.
this.setting( attachment.id );

if ( ! icon ) {
return;
}

// Update the icon in-browser.
link = $( 'link[rel="icon"][sizes="32x32"]' );
link.attr( 'href', icon.url );
},

/**
* Called when the "Remove" link is clicked. Empties the setting.
*
* @param {Object} event jQuery Event object
*/
removeFile: function( event ) {
if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
return;
}
event.preventDefault();

this.params.attachment = {};
this.setting( '' );
this.renderContent(); // Not bound to setting change when emptying.
$( 'link[rel="icon"][sizes="32x32"]' ).attr( 'href', '/favicon.ico' ); // Set to default.
}
});

/**
* @class wp.customize.HeaderControl
* @augments wp.customize.Control
*/
api.HeaderControl = api.Control.extend(/** @lends wp.customize.HeaderControl.prototype */{
ready: function() {
this.btnRemove = $('#customize-control-header_image .actions .remove');
this.btnNew = $('#customize-control-header_image .actions .new');

_.bindAll(this, 'openMedia', 'removeImage');

this.btnNew.on( 'click', this.openMedia );
this.btnRemove.on( 'click', this.removeImage );

api.HeaderTool.currentHeader = this.getInitialHeaderImage();

new api.HeaderTool.CurrentView({
model: api.HeaderTool.currentHeader,
el: '#customize-control-header_image .current .container'
});

new api.HeaderTool.ChoiceListView({
collection: api.HeaderTool.UploadsList = new api.HeaderTool.ChoiceList(),
el: '#customize-control-header_image .choices .uploaded .list'
});

new api.HeaderTool.ChoiceListView({
collection: api.HeaderTool.DefaultsList = new api.HeaderTool.DefaultsList(),
el: '#customize-control-header_image .choices .default .list'
});

api.HeaderTool.combinedList = api.HeaderTool.CombinedList = new api.HeaderTool.CombinedList([
api.HeaderTool.UploadsList,
api.HeaderTool.DefaultsList
]);

// Ensure custom-header-crop Ajax requests bootstrap the Customizer to activate the previewed theme.
wp.media.controller.Cropper.prototype.defaults.doCropArgs.wp_customize = 'on';
wp.media.controller.Cropper.prototype.defaults.doCropArgs.customize_theme = api.settings.theme.stylesheet;
},

/**
* Returns a new instance of api.HeaderTool.ImageModel based on the currently
* saved header image (if any).
*
* @since 4.2.0
*
* @return {Object} Options
*/
getInitialHeaderImage: function() {
if ( ! api.get().header_image || ! api.get().header_image_data || _.contains( [ 'remove-header', 'random-default-image', 'random-uploaded-image' ], api.get().header_image ) ) {
return new api.HeaderTool.ImageModel();
}

// Get the matching uploaded image object.
var currentHeaderObject = _.find( _wpCustomizeHeader.uploads, function( imageObj ) {
return ( imageObj.attachment_id === api.get().header_image_data.attachment_id );
} );
// Fall back to raw current header image.
if ( ! currentHeaderObject ) {
currentHeaderObject = {
url: api.get().header_image,
thumbnail_url: api.get().header_image,
attachment_id: api.get().header_image_data.attachment_id
};
}

return new api.HeaderTool.ImageModel({
header: currentHeaderObject,
choice: currentHeaderObject.url.split( '/' ).pop()
});
},

/**
* Returns a set of options, computed from the attached image data and
* theme-specific data, to be fed to the imgAreaSelect plugin in
* wp.media.view.Cropper.
*
* @param {wp.media.model.Attachment} attachment
* @param {wp.media.controller.Cropper} controller
* @return {Object} Options
*/
calculateImageSelectOptions: function(attachment, controller) {
var xInit = parseInt(_wpCustomizeHeader.data.width, 10),
yInit = parseInt(_wpCustomizeHeader.data.height, 10),
flexWidth = !! parseInt(_wpCustomizeHeader.data['flex-width'], 10),
flexHeight = !! parseInt(_wpCustomizeHeader.data['flex-height'], 10),
ratio, xImg, yImg, realHeight, realWidth,
imgSelectOptions;

realWidth = attachment.get('width');
realHeight = attachment.get('height');

this.headerImage = new api.HeaderTool.ImageModel();
this.headerImage.set({
themeWidth: xInit,
themeHeight: yInit,
themeFlexWidth: flexWidth,
themeFlexHeight: flexHeight,
imageWidth: realWidth,
imageHeight: realHeight
});

controller.set( 'canSkipCrop', ! this.headerImage.shouldBeCropped() );

ratio = xInit / yInit;
xImg = realWidth;
yImg = realHeight;

if ( xImg / yImg > ratio ) {
yInit = yImg;
xInit = yInit * ratio;
} else {
xInit = xImg;
yInit = xInit / ratio;
}

imgSelectOptions = {
handles: true,
keys: true,
instance: true,
persistent: true,
imageWidth: realWidth,
imageHeight: realHeight,
x1: 0,
y1: 0,
x2: xInit,
y2: yInit
};

if (flexHeight === false && flexWidth === false) {
imgSelectOptions.aspectRatio = xInit + ':' + yInit;
}
if (flexHeight === false ) {
imgSelectOptions.maxHeight = yInit;
}
if (flexWidth === false ) {
imgSelectOptions.maxWidth = xInit;
}

return imgSelectOptions;
},

/**
* Sets up and opens the Media Manager in order to select an image.
* Depending on both the size of the image and the properties of the
* current theme, a cropping step after selection may be required or
* skippable.
*
* @param {event} event
*/
openMedia: function(event) {
var l10n = _wpMediaViewsL10n;

event.preventDefault();

this.frame = wp.media({
button: {
text: l10n.selectAndCrop,
close: false
},
states: [
new wp.media.controller.Library({
title: l10n.chooseImage,
library: wp.media.query({ type: 'image' }),
multiple: false,
date: false,
priority: 20,
suggestedWidth: _wpCustomizeHeader.data.width,
suggestedHeight: _wpCustomizeHeader.data.height
}),
new wp.media.controller.Cropper({
imgSelectOptions: this.calculateImageSelectOptions
})
]
});

this.frame.on('select', this.onSelect, this);
this.frame.on('cropped', this.onCropped, this);
this.frame.on('skippedcrop', this.onSkippedCrop, this);

this.frame.open();
},

/**
* After an image is selected in the media modal,
* switch to the cropper state.
*/
onSelect: function() {
this.frame.setState('cropper');
},

/**
* After the image has been cropped, apply the cropped image data to the setting.
*
* @param {Object} croppedImage Cropped attachment data.
*/
onCropped: function(croppedImage) {
var url = croppedImage.url,
attachmentId = croppedImage.attachment_id,
w = croppedImage.width,
h = croppedImage.height;
this.setImageFromURL(url, attachmentId, w, h);
},

/**
* If cropping was skipped, apply the image data directly to the setting.
*
* @param {Object} selection
*/
onSkippedCrop: function(selection) {
var url = selection.get('url'),
w = selection.get('width'),
h = selection.get('height');
this.setImageFromURL(url, selection.id, w, h);
},

/**
* Creates a new wp.customize.HeaderTool.ImageModel from provided
* header image data and inserts it into the user-uploaded headers
* collection.
*
* @param {string} url
* @param {number} attachmentId
* @param {number} width
* @param {number} height
*/
setImageFromURL: function(url, attachmentId, width, height) {
var choice, data = {};

data.url = url;
data.thumbnail_url = url;
data.timestamp = _.now();

if (attachmentId) {
data.attachment_id = attachmentId;
}

if (width) {
data.width = width;
}

if (height) {
data.height = height;
}

choice = new api.HeaderTool.ImageModel({
header: data,
choice: url.split('/').pop()
});
api.HeaderTool.UploadsList.add(choice);
api.HeaderTool.currentHeader.set(choice.toJSON());
choice.save();
choice.importImage();
},

/**
* Triggers the necessary events to deselect an image which was set as
* the currently selected one.
*/
removeImage: function() {
api.HeaderTool.currentHeader.trigger('hide');
api.HeaderTool.CombinedList.trigger('control:removeImage');
}

});

/**
* wp.customize.ThemeControl
*
* @class wp.customize.ThemeControl
* @augments wp.customize.Control
*/
api.ThemeControl = api.Control.extend(/** @lends wp.customize.ThemeControl.prototype */{

touchDrag: false,
screenshotRendered: false,

/**
* @since 4.2.0
*/
ready: function() {
var control = this, panel = api.panel( 'themes' );

function disableSwitchButtons() {
return ! panel.canSwitchTheme( control.params.theme.id );
}

// Temporary special function since supplying SFTP credentials does not work yet. See #42184.
function disableInstallButtons() {
return disableSwitchButtons() || false === api.settings.theme._canInstall || true === api.settings.theme._filesystemCredentialsNeeded;
}
function updateButtons() {
control.container.find( 'button.preview, button.preview-theme' ).toggleClass( 'disabled', disableSwitchButtons() );
control.container.find( 'button.theme-install' ).toggleClass( 'disabled', disableInstallButtons() );
}

api.state( 'selectedChangesetStatus' ).bind( updateButtons );
api.state( 'changesetStatus' ).bind( updateButtons );
updateButtons();

control.container.on( 'touchmove', '.theme', function() {
control.touchDrag = true;
});

// Bind details view trigger.
control.container.on( 'click keydown touchend', '.theme', function( event ) {
var section;
if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
return;
}

// Bail if the user scrolled on a touch device.
if ( control.touchDrag === true ) {
return control.touchDrag = false;
}

// Prevent the modal from showing when the user clicks the action button.
if ( $( event.target ).is( '.theme-actions .button, .update-theme' ) ) {
return;
}

event.preventDefault(); // Keep this AFTER the key filter above.
section = api.section( control.section() );
section.showDetails( control.params.theme, function() {

// Temporary special function since supplying SFTP credentials does not work yet. See #42184.
if ( api.settings.theme._filesystemCredentialsNeeded ) {
section.overlay.find( '.theme-actions .delete-theme' ).remove();
}
} );
});

control.container.on( 'render-screenshot', function() {
var $screenshot = $( this ).find( 'img' ),
source = $screenshot.data( 'src' );

if ( source ) {
$screenshot.attr( 'src', source );
}
control.screenshotRendered = true;
});
},

/**
* Show or hide the theme based on the presence of the term in the title, description, tags, and author.
*
* @since 4.2.0
* @param {Array} terms - An array of terms to search for.
* @return {boolean} Whether a theme control was activated or not.
*/
filter: function( terms ) {
var control = this,
matchCount = 0,
haystack = control.params.theme.name + ' ' +
control.params.theme.description + ' ' +
control.params.theme.tags + ' ' +
control.params.theme.author + ' ';
haystack = haystack.toLowerCase().replace( '-', ' ' );

// Back-compat for behavior in WordPress 4.2.0 to 4.8.X.
if ( ! _.isArray( terms ) ) {
terms = [ terms ];
}

// Always give exact name matches highest ranking.
if ( control.params.theme.name.toLowerCase() === terms.join( ' ' ) ) {
matchCount = 100;
} else {

// Search for and weight (by 10) complete term matches.
matchCount = matchCount + 10 * ( haystack.split( terms.join( ' ' ) ).length - 1 );

// Search for each term individually (as whole-word and partial match) and sum weighted match counts.
_.each( terms, function( term ) {
matchCount = matchCount + 2 * ( haystack.split( term + ' ' ).length - 1 ); // Whole-word, double-weighted.
matchCount = matchCount + haystack.split( term ).length - 1; // Partial word, to minimize empty intermediate searches while typing.
});

// Upper limit on match ranking.
if ( matchCount > 99 ) {
matchCount = 99;
}
}

if ( 0 !== matchCount ) {
control.activate();
control.params.priority = 101 - matchCount; // Sort results by match count.
return true;
} else {
control.deactivate(); // Hide control.
control.params.priority = 101;
return false;
}
},

/**
* Rerender the theme from its JS template with the installed type.
*
* @since 4.9.0
*
* @return {void}
*/
rerenderAsInstalled: function( installed ) {
var control = this, section;
if ( installed ) {
control.params.theme.type = 'installed';
} else {
section = api.section( control.params.section );
control.params.theme.type = section.params.action;
}
control.renderContent(); // Replaces existing content.
control.container.trigger( 'render-screenshot' );
}
});

/**
* Class wp.customize.CodeEditorControl
*
* @since 4.9.0
*
* @class wp.customize.CodeEditorControl
* @augments wp.customize.Control
*/
api.CodeEditorControl = api.Control.extend(/** @lends wp.customize.CodeEditorControl.prototype */{

/**
* Initialize.
*
* @since 4.9.0
* @param {string} id - Unique identifier for the control instance.
* @param {Object} options - Options hash for the control instance.
* @return {void}
*/
initialize: function( id, options ) {
var control = this;
control.deferred = _.extend( control.deferred || {}, {
codemirror: $.Deferred()
} );
api.Control.prototype.initialize.call( control, id, options );

// Note that rendering is debounced so the props will be used when rendering happens after add event.
control.notifications.bind( 'add', function( notification ) {

// Skip if control notification is not from setting csslint_error notification.
if ( notification.code !== control.setting.id + ':csslint_error' ) {
return;
}

// Customize the template and behavior of csslint_error notifications.
notification.templateId = 'customize-code-editor-lint-error-notification';
notification.render = (function( render ) {
return function() {
var li = render.call( this );
li.find( 'input[type=checkbox]' ).on( 'click', function() {
control.setting.notifications.remove( 'csslint_error' );
} );
return li;
};
})( notification.render );
} );
},

/**
* Initialize the editor when the containing section is ready and expanded.
*
* @since 4.9.0
* @return {void}
*/
ready: function() {
var control = this;
if ( ! control.section() ) {
control.initEditor();
return;
}

// Wait to initialize editor until section is embedded and expanded.
api.section( control.section(), function( section ) {
section.deferred.embedded.done( function() {
var onceExpanded;
if ( section.expanded() ) {
control.initEditor();
} else {
onceExpanded = function( isExpanded ) {
if ( isExpanded ) {
control.initEditor();
section.expanded.unbind( onceExpanded );
}
};
section.expanded.bind( onceExpanded );
}
} );
} );
},

/**
* Initialize editor.
*
* @since 4.9.0
* @return {void}
*/
initEditor: function() {
var control = this, element, editorSettings = false;

// Obtain editorSettings for instantiation.
if ( wp.codeEditor && ( _.isUndefined( control.params.editor_settings ) || false !== control.params.editor_settings ) ) {

// Obtain default editor settings.
editorSettings = wp.codeEditor.defaultSettings ? _.clone( wp.codeEditor.defaultSettings ) : {};
editorSettings.codemirror = _.extend(
{},
editorSettings.codemirror,
{
indentUnit: 2,
tabSize: 2
}
);

// Merge editor_settings param on top of defaults.
if ( _.isObject( control.params.editor_settings ) ) {
_.each( control.params.editor_settings, function( value, key ) {
if ( _.isObject( value ) ) {
editorSettings[ key ] = _.extend(
{},
editorSettings[ key ],
value
);
}
} );
}
}

element = new api.Element( control.container.find( 'textarea' ) );
control.elements.push( element );
element.sync( control.setting );
element.set( control.setting() );

if ( editorSettings ) {
control.initSyntaxHighlightingEditor( editorSettings );
} else {
control.initPlainTextareaEditor();
}
},

/**
* Make sure editor gets focused when control is focused.
*
* @since 4.9.0
* @param {Object} [params] - Focus params.
* @param {Function} [params.completeCallback] - Function to call when expansion is complete.
* @return {void}
*/
focus: function( params ) {
var control = this, extendedParams = _.extend( {}, params ), originalCompleteCallback;
originalCompleteCallback = extendedParams.completeCallback;
extendedParams.completeCallback = function() {
if ( originalCompleteCallback ) {
originalCompleteCallback();
}
if ( control.editor ) {
control.editor.codemirror.focus();
}
};
api.Control.prototype.focus.call( control, extendedParams );
},

/**
* Initialize syntax-highlighting editor.
*
* @since 4.9.0
* @param {Object} codeEditorSettings - Code editor settings.
* @return {void}
*/
initSyntaxHighlightingEditor: function( codeEditorSettings ) {
var control = this, $textarea = control.container.find( 'textarea' ), settings, suspendEditorUpdate = false;

settings = _.extend( {}, codeEditorSettings, {
onTabNext: _.bind( control.onTabNext, control ),
onTabPrevious: _.bind( control.onTabPrevious, control ),
onUpdateErrorNotice: _.bind( control.onUpdateErrorNotice, control )
});

control.editor = wp.codeEditor.initialize( $textarea, settings );

// Improve the editor accessibility.
$( control.editor.codemirror.display.lineDiv )
.attr({
role: 'textbox',
'aria-multiline': 'true',
'aria-label': control.params.label,
'aria-describedby': 'editor-keyboard-trap-help-1 editor-keyboard-trap-help-2 editor-keyboard-trap-help-3 editor-keyboard-trap-help-4'
});

// Focus the editor when clicking on its label.
control.container.find( 'label' ).on( 'click', function() {
control.editor.codemirror.focus();
});

/*
* When the CodeMirror instance changes, mirror to the textarea,
* where we have our "true" change event handler bound.
*/
control.editor.codemirror.on( 'change', function( codemirror ) {
suspendEditorUpdate = true;
$textarea.val( codemirror.getValue() ).trigger( 'change' );
suspendEditorUpdate = false;
});

// Update CodeMirror when the setting is changed by another plugin.
control.setting.bind( function( value ) {
if ( ! suspendEditorUpdate ) {
control.editor.codemirror.setValue( value );
}
});

// Prevent collapsing section when hitting Esc to tab out of editor.
control.editor.codemirror.on( 'keydown', function onKeydown( codemirror, event ) {
var escKeyCode = 27;
if ( escKeyCode === event.keyCode ) {
event.stopPropagation();
}
});

control.deferred.codemirror.resolveWith( control, [ control.editor.codemirror ] );
},

/**
* Handle tabbing to the field after the editor.
*
* @since 4.9.0
* @return {void}
*/
onTabNext: function onTabNext() {
var control = this, controls, controlIndex, section;
section = api.section( control.section() );
controls = section.controls();
controlIndex = controls.indexOf( control );
if ( controls.length === controlIndex + 1 ) {
$( '#customize-footer-actions .collapse-sidebar' ).trigger( 'focus' );
} else {
controls[ controlIndex + 1 ].container.find( ':focusable:first' ).focus();
}
},

/**
* Handle tabbing to the field before the editor.
*
* @since 4.9.0
* @return {void}
*/
onTabPrevious: function onTabPrevious() {
var control = this, controls, controlIndex, section;
section = api.section( control.section() );
controls = section.controls();
controlIndex = controls.indexOf( control );
if ( 0 === controlIndex ) {
section.contentContainer.find( '.customize-section-title .customize-help-toggle, .customize-section-title .customize-section-description.open .section-description-close' ).last().focus();
} else {
controls[ controlIndex - 1 ].contentContainer.find( ':focusable:first' ).focus();
}
},

/**
* Update error notice.
*
* @since 4.9.0
* @param {Array} errorAnnotations - Error annotations.
* @return {void}
*/
onUpdateErrorNotice: function onUpdateErrorNotice( errorAnnotations ) {
var control = this, message;
control.setting.notifications.remove( 'csslint_error' );

if ( 0 !== errorAnnotations.length ) {
if ( 1 === errorAnnotations.length ) {
message = api.l10n.customCssError.singular.replace( '%d', '1' );
} else {
message = api.l10n.customCssError.plural.replace( '%d', String( errorAnnotations.length ) );
}
control.setting.notifications.add( new api.Notification( 'csslint_error', {
message: message,
type: 'error'
} ) );
}
},

/**
* Initialize plain-textarea editor when syntax highlighting is disabled.
*
* @since 4.9.0
* @return {void}
*/
initPlainTextareaEditor: function() {
var control = this, $textarea = control.container.find( 'textarea' ), textarea = $textarea[0];

$textarea.on( 'blur', function onBlur() {
$textarea.data( 'next-tab-blurs', false );
} );

$textarea.on( 'keydown', function onKeydown( event ) {
var selectionStart, selectionEnd, value, tabKeyCode = 9, escKeyCode = 27;

if ( escKeyCode === event.keyCode ) {
if ( ! $textarea.data( 'next-tab-blurs' ) ) {
$textarea.data( 'next-tab-blurs', true );
event.stopPropagation(); // Prevent collapsing the section.
}
return;
}

// Short-circuit if tab key is not being pressed or if a modifier key *is* being pressed.
if ( tabKeyCode !== event.keyCode || event.ctrlKey || event.altKey || event.shiftKey ) {
return;
}

// Prevent capturing Tab characters if Esc was pressed.
if ( $textarea.data( 'next-tab-blurs' ) ) {
return;
}

selectionStart = textarea.selectionStart;
selectionEnd = textarea.selectionEnd;
value = textarea.value;

if ( selectionStart >= 0 ) {
textarea.value = value.substring( 0, selectionStart ).concat( '\t', value.substring( selectionEnd ) );
$textarea.selectionStart = textarea.selectionEnd = selectionStart + 1;
}

event.stopPropagation();
event.preventDefault();
});

control.deferred.codemirror.rejectWith( control );
}
});

/**
* Class wp.customize.DateTimeControl.
*
* @since 4.9.0
* @class wp.customize.DateTimeControl
* @augments wp.customize.Control
*/
api.DateTimeControl = api.Control.extend(/** @lends wp.customize.DateTimeControl.prototype */{

/**
* Initialize behaviors.
*
* @since 4.9.0
* @return {void}
*/
ready: function ready() {
var control = this;

control.inputElements = {};
control.invalidDate = false;

_.bindAll( control, 'populateSetting', 'updateDaysForMonth', 'populateDateInputs' );

if ( ! control.setting ) {
throw new Error( 'Missing setting' );
}

control.container.find( '.date-input' ).each( function() {
var input = $( this ), component, element;
component = input.data( 'component' );
element = new api.Element( input );
control.inputElements[ component ] = element;
control.elements.push( element );

// Add invalid date error once user changes (and has blurred the input).
input.on( 'change', function() {
if ( control.invalidDate ) {
control.notifications.add( new api.Notification( 'invalid_date', {
message: api.l10n.invalidDate
} ) );
}
} );

// Remove the error immediately after validity change.
input.on( 'input', _.debounce( function() {
if ( ! control.invalidDate ) {
control.notifications.remove( 'invalid_date' );
}
} ) );

// Add zero-padding when blurring field.
input.on( 'blur', _.debounce( function() {
if ( ! control.invalidDate ) {
control.populateDateInputs();
}
} ) );
} );

control.inputElements.month.bind( control.updateDaysForMonth );
control.inputElements.year.bind( control.updateDaysForMonth );
control.populateDateInputs();
control.setting.bind( control.populateDateInputs );

// Start populating setting after inputs have been populated.
_.each( control.inputElements, function( element ) {
element.bind( control.populateSetting );
} );
},

/**
* Parse datetime string.
*
* @since 4.9.0
*
* @param {string} datetime - Date/Time string. Accepts Y-m-d[ H:i[:s]] format.
* @return {Object|null} Returns object containing date components or null if parse error.
*/
parseDateTime: function parseDateTime( datetime ) {
var control = this, matches, date, midDayHour = 12;

if ( datetime ) {
matches = datetime.match( /^(\d\d\d\d)-(\d\d)-(\d\d)(?: (\d\d):(\d\d)(?::(\d\d))?)?$/ );
}

if ( ! matches ) {
return null;
}

matches.shift();

date = {
year: matches.shift(),
month: matches.shift(),
day: matches.shift(),
hour: matches.shift() || '00',
minute: matches.shift() || '00',
second: matches.shift() || '00'
};

if ( control.params.includeTime && control.params.twelveHourFormat ) {
date.hour = parseInt( date.hour, 10 );
date.meridian = date.hour >= midDayHour ? 'pm' : 'am';
date.hour = date.hour % midDayHour ? String( date.hour % midDayHour ) : String( midDayHour );
delete date.second; // @todo Why only if twelveHourFormat?
}

return date;
},

/**
* Validates if input components have valid date and time.
*
* @since 4.9.0
* @return {boolean} If date input fields has error.
*/
validateInputs: function validateInputs() {
var control = this, components, validityInput;

control.invalidDate = false;

components = [ 'year', 'day' ];
if ( control.params.includeTime ) {
components.push( 'hour', 'minute' );
}

_.find( components, function( component ) {
var element, max, min, value;

element = control.inputElements[ component ];
validityInput = element.element.get( 0 );
max = parseInt( element.element.attr( 'max' ), 10 );
min = parseInt( element.element.attr( 'min' ), 10 );
value = parseInt( element(), 10 );
control.invalidDate = isNaN( value ) || value > max || value < min;

if ( ! control.invalidDate ) {
validityInput.setCustomValidity( '' );
}

return control.invalidDate;
} );

if ( control.inputElements.meridian && ! control.invalidDate ) {
validityInput = control.inputElements.meridian.element.get( 0 );
if ( 'am' !== control.inputElements.meridian.get() && 'pm' !== control.inputElements.meridian.get() ) {
control.invalidDate = true;
} else {
validityInput.setCustomValidity( '' );
}
}

if ( control.invalidDate ) {
validityInput.setCustomValidity( api.l10n.invalidValue );
} else {
validityInput.setCustomValidity( '' );
}
if ( ! control.section() || api.section.has( control.section() ) && api.section( control.section() ).expanded() ) {
_.result( validityInput, 'reportValidity' );
}

return control.invalidDate;
},

/**
* Updates number of days according to the month and year selected.
*
* @since 4.9.0
* @return {void}
*/
updateDaysForMonth: function updateDaysForMonth() {
var control = this, daysInMonth, year, month, day;

month = parseInt( control.inputElements.month(), 10 );
year = parseInt( control.inputElements.year(), 10 );
day = parseInt( control.inputElements.day(), 10 );

if ( month && year ) {
daysInMonth = new Date( year, month, 0 ).getDate();
control.inputElements.day.element.attr( 'max', daysInMonth );

if ( day > daysInMonth ) {
control.inputElements.day( String( daysInMonth ) );
}
}
},

/**
* Populate setting value from the inputs.
*
* @since 4.9.0
* @return {boolean} If setting updated.
*/
populateSetting: function populateSetting() {
var control = this, date;

if ( control.validateInputs() || ! control.params.allowPastDate && ! control.isFutureDate() ) {
return false;
}

date = control.convertInputDateToString();
control.setting.set( date );
return true;
},

/**
* Converts input values to string in Y-m-d H:i:s format.
*
* @since 4.9.0
* @return {string} Date string.
*/
convertInputDateToString: function convertInputDateToString() {
var control = this, date = '', dateFormat, hourInTwentyFourHourFormat,
getElementValue, pad;

pad = function( number, padding ) {
var zeros;
if ( String( number ).length < padding ) {
zeros = padding - String( number ).length;
number = Math.pow( 10, zeros ).toString().substr( 1 ) + String( number );
}
return number;
};

getElementValue = function( component ) {
var value = parseInt( control.inputElements[ component ].get(), 10 );

if ( _.contains( [ 'month', 'day', 'hour', 'minute' ], component ) ) {
value = pad( value, 2 );
} else if ( 'year' === component ) {
value = pad( value, 4 );
}
return value;
};

dateFormat = [ 'year', '-', 'month', '-', 'day' ];
if ( control.params.includeTime ) {
hourInTwentyFourHourFormat = control.inputElements.meridian ? control.convertHourToTwentyFourHourFormat( control.inputElements.hour(), control.inputElements.meridian() ) : control.inputElements.hour();
dateFormat = dateFormat.concat( [ ' ', pad( hourInTwentyFourHourFormat, 2 ), ':', 'minute', ':', '00' ] );
}

_.each( dateFormat, function( component ) {
date += control.inputElements[ component ] ? getElementValue( component ) : component;
} );

return date;
},

/**
* Check if the date is in the future.
*
* @since 4.9.0
* @return {boolean} True if future date.
*/
isFutureDate: function isFutureDate() {
var control = this;
return 0 < api.utils.getRemainingTime( control.convertInputDateToString() );
},

/**
* Convert hour in twelve hour format to twenty four hour format.
*
* @since 4.9.0
* @param {string} hourInTwelveHourFormat - Hour in twelve hour format.
* @param {string} meridian - Either 'am' or 'pm'.
* @return {string} Hour in twenty four hour format.
*/
convertHourToTwentyFourHourFormat: function convertHour( hourInTwelveHourFormat, meridian ) {
var hourInTwentyFourHourFormat, hour, midDayHour = 12;

hour = parseInt( hourInTwelveHourFormat, 10 );
if ( isNaN( hour ) ) {
return '';
}

if ( 'pm' === meridian && hour < midDayHour ) {
hourInTwentyFourHourFormat = hour + midDayHour;
} else if ( 'am' === meridian && midDayHour === hour ) {
hourInTwentyFourHourFormat = hour - midDayHour;
} else {
hourInTwentyFourHourFormat = hour;
}

return String( hourInTwentyFourHourFormat );
},

/**
* Populates date inputs in date fields.
*
* @since 4.9.0
* @return {boolean} Whether the inputs were populated.
*/
populateDateInputs: function populateDateInputs() {
var control = this, parsed;

parsed = control.parseDateTime( control.setting.get() );

if ( ! parsed ) {
return false;
}

_.each( control.inputElements, function( element, component ) {
var value = parsed[ component ]; // This will be zero-padded string.

// Set month and meridian regardless of focused state since they are dropdowns.
if ( 'month' === component || 'meridian' === component ) {

// Options in dropdowns are not zero-padded.
value = value.replace( /^0/, '' );

element.set( value );
} else {

value = parseInt( value, 10 );
if ( ! element.element.is( document.activeElement ) ) {

// Populate element with zero-padded value if not focused.
element.set( parsed[ component ] );
} else if ( value !== parseInt( element(), 10 ) ) {

// Forcibly update the value if its underlying value changed, regardless of zero-padding.
element.set( String( value ) );
}
}
} );

return true;
},

/**
* Toggle future date notification for date control.
*
* @since 4.9.0
* @param {boolean} notify Add or remove the notification.
* @return {wp.customize.DateTimeControl}
*/
toggleFutureDateNotification: function toggleFutureDateNotification( notify ) {
var control = this, notificationCode, notification;

notificationCode = 'not_future_date';

if ( notify ) {
notification = new api.Notification( notificationCode, {
type: 'error',
message: api.l10n.futureDateError
} );
control.notifications.add( notification );
} else {
control.notifications.remove( notificationCode );
}

return control;
}
});

/**
* Class PreviewLinkControl.
*
* @since 4.9.0
* @class wp.customize.PreviewLinkControl
* @augments wp.customize.Control
*/
api.PreviewLinkControl = api.Control.extend(/** @lends wp.customize.PreviewLinkControl.prototype */{

defaults: _.extend( {}, api.Control.prototype.defaults, {
templateId: 'customize-preview-link-control'
} ),

/**
* Initialize behaviors.
*
* @since 4.9.0
* @return {void}
*/
ready: function ready() {
var control = this, element, component, node, url, input, button;

_.bindAll( control, 'updatePreviewLink' );

if ( ! control.setting ) {
control.setting = new api.Value();
}

control.previewElements = {};

control.container.find( '.preview-control-element' ).each( function() {
node = $( this );
component = node.data( 'component' );
element = new api.Element( node );
control.previewElements[ component ] = element;
control.elements.push( element );
} );

url = control.previewElements.url;
input = control.previewElements.input;
button = control.previewElements.button;

input.link( control.setting );
url.link( control.setting );

url.bind( function( value ) {
url.element.parent().attr( {
href: value,
target: api.settings.changeset.uuid
} );
} );

api.bind( 'ready', control.updatePreviewLink );
api.state( 'saved' ).bind( control.updatePreviewLink );
api.state( 'changesetStatus' ).bind( control.updatePreviewLink );
api.state( 'activated' ).bind( control.updatePreviewLink );
api.previewer.previewUrl.bind( control.updatePreviewLink );

button.element.on( 'click', function( event ) {
event.preventDefault();
if ( control.setting() ) {
input.element.select();
document.execCommand( 'copy' );
button( button.element.data( 'copied-text' ) );
}
} );

url.element.parent().on( 'click', function( event ) {
if ( $( this ).hasClass( 'disabled' ) ) {
event.preventDefault();
}
} );

button.element.on( 'mouseenter', function() {
if ( control.setting() ) {
button( button.element.data( 'copy-text' ) );
}
} );
},

/**
* Updates Preview Link
*
* @since 4.9.0
* @return {void}
*/
updatePreviewLink: function updatePreviewLink() {
var control = this, unsavedDirtyValues;

unsavedDirtyValues = ! api.state( 'saved' ).get() || '' === api.state( 'changesetStatus' ).get() || 'auto-draft' === api.state( 'changesetStatus' ).get();

control.toggleSaveNotification( unsavedDirtyValues );
control.previewElements.url.element.parent().toggleClass( 'disabled', unsavedDirtyValues );
control.previewElements.button.element.prop( 'disabled', unsavedDirtyValues );
control.setting.set( api.previewer.getFrontendPreviewUrl() );
},

/**
* Toggles save notification.
*
* @since 4.9.0
* @param {boolean} notify Add or remove notification.
* @return {void}
*/
toggleSaveNotification: function toggleSaveNotification( notify ) {
var control = this, notificationCode, notification;

notificationCode = 'changes_not_saved';

if ( notify ) {
notification = new api.Notification( notificationCode, {
type: 'info',
message: api.l10n.saveBeforeShare
} );
control.notifications.add( notification );
} else {
control.notifications.remove( notificationCode );
}
}
});

/**
* Change objects contained within the main customize object to Settings.
*
* @alias wp.customize.defaultConstructor
*/
api.defaultConstructor = api.Setting;

/**
* Callback for resolved controls.
*
* @callback wp.customize.deferredControlsCallback
* @param {wp.customize.Control[]} controls Resolved controls.
*/

/**
* Collection of all registered controls.
*
* @alias wp.customize.control
*
* @since 3.4.0
*
* @type {Function}
* @param {...string} ids - One or more ids for controls to obtain.
* @param {deferredControlsCallback} [callback] - Function called when all supplied controls exist.
* @return {wp.customize.Control|undefined|jQuery.promise} Control instance or undefined (if function called with one id param),
* or promise resolving to requested controls.
*
* @example <caption>Loop over all registered controls.</caption>
* wp.customize.control.each( function( control ) { ... } );
*
* @example <caption>Getting `background_color` control instance.</caption>
* control = wp.customize.control( 'background_color' );
*
* @example <caption>Check if control exists.</caption>
* hasControl = wp.customize.control.has( 'background_color' );
*
* @example <caption>Deferred getting of `background_color` control until it exists, using callback.</caption>
* wp.customize.control( 'background_color', function( control ) { ... } );
*
* @example <caption>Get title and tagline controls when they both exist, using promise (only available when multiple IDs are present).</caption>
* promise = wp.customize.control( 'blogname', 'blogdescription' );
* promise.done( function( titleControl, taglineControl ) { ... } );
*
* @example <caption>Get title and tagline controls when they both exist, using callback.</caption>
* wp.customize.control( 'blogname', 'blogdescription', function( titleControl, taglineControl ) { ... } );
*
* @example <caption>Getting setting value for `background_color` control.</caption>
* value = wp.customize.control( 'background_color ').setting.get();
* value = wp.customize( 'background_color' ).get(); // Same as above, since setting ID and control ID are the same.
*
* @example <caption>Add new control for site title.</caption>
* wp.customize.control.add( new wp.customize.Control( 'other_blogname', {
* setting: 'blogname',
* type: 'text',
* label: 'Site title',
* section: 'other_site_identify'
* } ) );
*
* @example <caption>Remove control.</caption>
* wp.customize.control.remove( 'other_blogname' );
*
* @example <caption>Listen for control being added.</caption>
* wp.customize.control.bind( 'add', function( addedControl ) { ... } )
*
* @example <caption>Listen for control being removed.</caption>
* wp.customize.control.bind( 'removed', function( removedControl ) { ... } )
*/
api.control = new api.Values({ defaultConstructor: api.Control });

/**
* Callback for resolved sections.
*
* @callback wp.customize.deferredSectionsCallback
* @param {wp.customize.Section[]} sections Resolved sections.
*/

/**
* Collection of all registered sections.
*
* @alias wp.customize.section
*
* @since 3.4.0
*
* @type {Function}
* @param {...string} ids - One or more ids for sections to obtain.
* @param {deferredSectionsCallback} [callback] - Function called when all supplied sections exist.
* @return {wp.customize.Section|undefined|jQuery.promise} Section instance or undefined (if function called with one id param),
* or promise resolving to requested sections.
*
* @example <caption>Loop over all registered sections.</caption>
* wp.customize.section.each( function( section ) { ... } )
*
* @example <caption>Getting `title_tagline` section instance.</caption>
* section = wp.customize.section( 'title_tagline' )
*
* @example <caption>Expand dynamically-created section when it exists.</caption>
* wp.customize.section( 'dynamically_created', function( section ) {
* section.expand();
* } );
*
* @see {@link wp.customize.control} for further examples of how to interact with {@link wp.customize.Values} instances.
*/
api.section = new api.Values({ defaultConstructor: api.Section });

/**
* Callback for resolved panels.
*
* @callback wp.customize.deferredPanelsCallback
* @param {wp.customize.Panel[]} panels Resolved panels.
*/

/**
* Collection of all registered panels.
*
* @alias wp.customize.panel
*
* @since 4.0.0
*
* @type {Function}
* @param {...string} ids - One or more ids for panels to obtain.
* @param {deferredPanelsCallback} [callback] - Function called when all supplied panels exist.
* @return {wp.customize.Panel|undefined|jQuery.promise} Panel instance or undefined (if function called with one id param),
* or promise resolving to requested panels.
*
* @example <caption>Loop over all registered panels.</caption>
* wp.customize.panel.each( function( panel ) { ... } )
*
* @example <caption>Getting nav_menus panel instance.</caption>
* panel = wp.customize.panel( 'nav_menus' );
*
* @example <caption>Expand dynamically-created panel when it exists.</caption>
* wp.customize.panel( 'dynamically_created', function( panel ) {
* panel.expand();
* } );
*
* @see {@link wp.customize.control} for further examples of how to interact with {@link wp.customize.Values} instances.
*/
api.panel = new api.Values({ defaultConstructor: api.Panel });

/**
* Callback for resolved notifications.
*
* @callback wp.customize.deferredNotificationsCallback
* @param {wp.customize.Notification[]} notifications Resolved notifications.
*/

/**
* Collection of all global notifications.
*
* @alias wp.customize.notifications
*
* @since 4.9.0
*
* @type {Function}
* @param {...string} codes - One or more codes for notifications to obtain.
* @param {deferredNotificationsCallback} [callback] - Function called when all supplied notifications exist.
* @return {wp.customize.Notification|undefined|jQuery.promise} Notification instance or undefined (if function called with one code param),
* or promise resolving to requested notifications.
*
* @example <caption>Check if existing notification</caption>
* exists = wp.customize.notifications.has( 'a_new_day_arrived' );
*
* @example <caption>Obtain existing notification</caption>
* notification = wp.customize.notifications( 'a_new_day_arrived' );
*
* @example <caption>Obtain notification that may not exist yet.</caption>
* wp.customize.notifications( 'a_new_day_arrived', function( notification ) { ... } );
*
* @example <caption>Add a warning notification.</caption>
* wp.customize.notifications.add( new wp.customize.Notification( 'midnight_almost_here', {
* type: 'warning',
* message: 'Midnight has almost arrived!',
* dismissible: true
* } ) );
*
* @example <caption>Remove a notification.</caption>
* wp.customize.notifications.remove( 'a_new_day_arrived' );
*
* @see {@link wp.customize.control} for further examples of how to interact with {@link wp.customize.Values} instances.
*/
api.notifications = new api.Notifications();

api.PreviewFrame = api.Messenger.extend(/** @lends wp.customize.PreviewFrame.prototype */{
sensitivity: null, // Will get set to api.settings.timeouts.previewFrameSensitivity.

/**
* An object that fetches a preview in the background of the document, which
* allows for seamless replacement of an existing preview.
*
* @constructs wp.customize.PreviewFrame
* @augments wp.customize.Messenger
*
* @param {Object} params.container
* @param {Object} params.previewUrl
* @param {Object} params.query
* @param {Object} options
*/
initialize: function( params, options ) {
var deferred = $.Deferred();

/*
* Make the instance of the PreviewFrame the promise object
* so other objects can easily interact with it.
*/
deferred.promise( this );

this.container = params.container;

$.extend( params, { channel: api.PreviewFrame.uuid() });

api.Messenger.prototype.initialize.call( this, params, options );

this.add( 'previewUrl', params.previewUrl );

this.query = $.extend( params.query || {}, { customize_messenger_channel: this.channel() });

this.run( deferred );
},

/**
* Run the preview request.
*
* @param {Object} deferred jQuery Deferred object to be resolved with
* the request.
*/
run: function( deferred ) {
var previewFrame = this,
loaded = false,
ready = false,
readyData = null,
hasPendingChangesetUpdate = '{}' !== previewFrame.query.customized,
urlParser,
params,
form;

if ( previewFrame._ready ) {
previewFrame.unbind( 'ready', previewFrame._ready );
}

previewFrame._ready = function( data ) {
ready = true;
readyData = data;
previewFrame.container.addClass( 'iframe-ready' );
if ( ! data ) {
return;
}

if ( loaded ) {
deferred.resolveWith( previewFrame, [ data ] );
}
};

previewFrame.bind( 'ready', previewFrame._ready );

urlParser = document.createElement( 'a' );
urlParser.href = previewFrame.previewUrl();

params = _.extend(
api.utils.parseQueryString( urlParser.search.substr( 1 ) ),
{
customize_changeset_uuid: previewFrame.query.customize_changeset_uuid,
customize_theme: previewFrame.query.customize_theme,
customize_messenger_channel: previewFrame.query.customize_messenger_channel
}
);
if ( api.settings.changeset.autosaved || ! api.state( 'saved' ).get() ) {
params.customize_autosaved = 'on';
}

urlParser.search = $.param( params );
previewFrame.iframe = $( '<iframe />', {
title: api.l10n.previewIframeTitle,
name: 'customize-' + previewFrame.channel()
} );
previewFrame.iframe.attr( 'onmousewheel', '' ); // Workaround for Safari bug. See WP Trac #38149.
previewFrame.iframe.attr( 'sandbox', 'allow-forms allow-modals allow-orientation-lock allow-pointer-lock allow-popups allow-popups-to-escape-sandbox allow-presentation allow-same-origin allow-scripts' );

if ( ! hasPendingChangesetUpdate ) {
previewFrame.iframe.attr( 'src', urlParser.href );
} else {
previewFrame.iframe.attr( 'data-src', urlParser.href ); // For debugging purposes.
}

previewFrame.iframe.appendTo( previewFrame.container );
previewFrame.targetWindow( previewFrame.iframe[0].contentWindow );

/*
* Submit customized data in POST request to preview frame window since
* there are setting value changes not yet written to changeset.
*/
if ( hasPendingChangesetUpdate ) {
form = $( '<form>', {
action: urlParser.href,
target: previewFrame.iframe.attr( 'name' ),
method: 'post',
hidden: 'hidden'
} );
form.append( $( '<input>', {
type: 'hidden',
name: '_method',
value: 'GET'
} ) );
_.each( previewFrame.query, function( value, key ) {
form.append( $( '<input>', {
type: 'hidden',
name: key,
value: value
} ) );
} );
previewFrame.container.append( form );
form.trigger( 'submit' );
form.remove(); // No need to keep the form around after submitted.
}

previewFrame.bind( 'iframe-loading-error', function( error ) {
previewFrame.iframe.remove();

// Check if the user is not logged in.
if ( 0 === error ) {
previewFrame.login( deferred );
return;
}

// Check for cheaters.
if ( -1 === error ) {
deferred.rejectWith( previewFrame, [ 'cheatin' ] );
return;
}

deferred.rejectWith( previewFrame, [ 'request failure' ] );
} );

previewFrame.iframe.one( 'load', function() {
loaded = true;

if ( ready ) {
deferred.resolveWith( previewFrame, [ readyData ] );
} else {
setTimeout( function() {
deferred.rejectWith( previewFrame, [ 'ready timeout' ] );
}, previewFrame.sensitivity );
}
});
},

login: function( deferred ) {
var self = this,
reject;

reject = function() {
deferred.rejectWith( self, [ 'logged out' ] );
};

if ( this.triedLogin ) {
return reject();
}

// Check if we have an admin cookie.
$.get( api.settings.url.ajax, {
action: 'logged-in'
}).fail( reject ).done( function( response ) {
var iframe;

if ( '1' !== response ) {
reject();
}

iframe = $( '<iframe />', { 'src': self.previewUrl(), 'title': api.l10n.previewIframeTitle } ).hide();
iframe.appendTo( self.container );
iframe.on( 'load', function() {
self.triedLogin = true;

iframe.remove();
self.run( deferred );
});
});
},

destroy: function() {
api.Messenger.prototype.destroy.call( this );

if ( this.iframe ) {
this.iframe.remove();
}

delete this.iframe;
delete this.targetWindow;
}
});

(function(){
var id = 0;
/**
* Return an incremented ID for a preview messenger channel.
*
* This function is named "uuid" for historical reasons, but it is a
* misnomer as it is not an actual UUID, and it is not universally unique.
* This is not to be confused with `api.settings.changeset.uuid`.
*
* @return {string}
*/
api.PreviewFrame.uuid = function() {
return 'preview-' + String( id++ );
};
}());

/**
* Set the document title of the customizer.
*
* @alias wp.customize.setDocumentTitle
*
* @since 4.1.0
*
* @param {string} documentTitle
*/
api.setDocumentTitle = function ( documentTitle ) {
var tmpl, title;
tmpl = api.settings.documentTitleTmpl;
title = tmpl.replace( '%s', documentTitle );
document.title = title;
api.trigger( 'title', title );
};

api.Previewer = api.Messenger.extend(/** @lends wp.customize.Previewer.prototype */{
refreshBuffer: null, // Will get set to api.settings.timeouts.windowRefresh.

/**
* @constructs wp.customize.Previewer
* @augments wp.customize.Messenger
*
* @param {Array} params.allowedUrls
* @param {string} params.container A selector or jQuery element for the preview
* frame to be placed.
* @param {string} params.form
* @param {string} params.previewUrl The URL to preview.
* @param {Object} options
*/
initialize: function( params, options ) {
var previewer = this,
urlParser = document.createElement( 'a' );

$.extend( previewer, options || {} );
previewer.deferred = {
active: $.Deferred()
};

// Debounce to prevent hammering server and then wait for any pending update requests.
previewer.refresh = _.debounce(
( function( originalRefresh ) {
return function() {
var isProcessingComplete, refreshOnceProcessingComplete;
isProcessingComplete = function() {
return 0 === api.state( 'processing' ).get();
};
if ( isProcessingComplete() ) {
originalRefresh.call( previewer );
} else {
refreshOnceProcessingComplete = function() {
if ( isProcessingComplete() ) {
originalRefresh.call( previewer );
api.state( 'processing' ).unbind( refreshOnceProcessingComplete );
}
};
api.state( 'processing' ).bind( refreshOnceProcessingComplete );
}
};
}( previewer.refresh ) ),
previewer.refreshBuffer
);

previewer.container = api.ensure( params.container );
previewer.allowedUrls = params.allowedUrls;

params.url = window.location.href;

api.Messenger.prototype.initialize.call( previewer, params );

urlParser.href = previewer.origin();
previewer.add( 'scheme', urlParser.protocol.replace( /:$/, '' ) );

/*
* Limit the URL to internal, front-end links.
*
* If the front end and the admin are served from the same domain, load the
* preview over ssl if the Customizer is being loaded over ssl. This avoids
* insecure content warnings. This is not attempted if the admin and front end
* are on different domains to avoid the case where the front end doesn't have
* ssl certs.
*/

previewer.add( 'previewUrl', params.previewUrl ).setter( function( to ) {
var result = null, urlParser, queryParams, parsedAllowedUrl, parsedCandidateUrls = [];
urlParser = document.createElement( 'a' );
urlParser.href = to;

// Abort if URL is for admin or (static) files in wp-includes or wp-content.
if ( /\/wp-(admin|includes|content)(\/|$)/.test( urlParser.pathname ) ) {
return null;
}

// Remove state query params.
if ( urlParser.search.length > 1 ) {
queryParams = api.utils.parseQueryString( urlParser.search.substr( 1 ) );
delete queryParams.customize_changeset_uuid;
delete queryParams.customize_theme;
delete queryParams.customize_messenger_channel;
delete queryParams.customize_autosaved;
if ( _.isEmpty( queryParams ) ) {
urlParser.search = '';
} else {
urlParser.search = $.param( queryParams );
}
}

parsedCandidateUrls.push( urlParser );

// Prepend list with URL that matches the scheme/protocol of the iframe.
if ( previewer.scheme.get() + ':' !== urlParser.protocol ) {
urlParser = document.createElement( 'a' );
urlParser.href = parsedCandidateUrls[0].href;
urlParser.protocol = previewer.scheme.get() + ':';
parsedCandidateUrls.unshift( urlParser );
}

// Attempt to match the URL to the control frame's scheme and check if it's allowed. If not, try the original URL.
parsedAllowedUrl = document.createElement( 'a' );
_.find( parsedCandidateUrls, function( parsedCandidateUrl ) {
return ! _.isUndefined( _.find( previewer.allowedUrls, function( allowedUrl ) {
parsedAllowedUrl.href = allowedUrl;
if ( urlParser.protocol === parsedAllowedUrl.protocol && urlParser.host === parsedAllowedUrl.host && 0 === urlParser.pathname.indexOf( parsedAllowedUrl.pathname.replace( /\/$/, '' ) ) ) {
result = parsedCandidateUrl.href;
return true;
}
} ) );
} );

return result;
});

previewer.bind( 'ready', previewer.ready );

// Start listening for keep-alive messages when iframe first loads.
previewer.deferred.active.done( _.bind( previewer.keepPreviewAlive, previewer ) );

previewer.bind( 'synced', function() {
previewer.send( 'active' );
} );

// Refresh the preview when the URL is changed (but not yet).
previewer.previewUrl.bind( previewer.refresh );

previewer.scroll = 0;
previewer.bind( 'scroll', function( distance ) {
previewer.scroll = distance;
});

// Update the URL when the iframe sends a URL message, resetting scroll position. If URL is unchanged, then refresh.
previewer.bind( 'url', function( url ) {
var onUrlChange, urlChanged = false;
previewer.scroll = 0;
onUrlChange = function() {
urlChanged = true;
};
previewer.previewUrl.bind( onUrlChange );
previewer.previewUrl.set( url );
previewer.previewUrl.unbind( onUrlChange );
if ( ! urlChanged ) {
previewer.refresh();
}
} );

// Update the document title when the preview changes.
previewer.bind( 'documentTitle', function ( title ) {
api.setDocumentTitle( title );
} );
},

/**
* Handle the preview receiving the ready message.
*
* @since 4.7.0
* @access public
*
* @param {Object} data - Data from preview.
* @param {string} data.currentUrl - Current URL.
* @param {Object} data.activePanels - Active panels.
* @param {Object} data.activeSections Active sections.
* @param {Object} data.activeControls Active controls.
* @return {void}
*/
ready: function( data ) {
var previewer = this, synced = {}, constructs;

synced.settings = api.get();
synced['settings-modified-while-loading'] = previewer.settingsModifiedWhileLoading;
if ( 'resolved' !== previewer.deferred.active.state() || previewer.loading ) {
synced.scroll = previewer.scroll;
}
synced['edit-shortcut-visibility'] = api.state( 'editShortcutVisibility' ).get();
previewer.send( 'sync', synced );

// Set the previewUrl without causing the url to set the iframe.
if ( data.currentUrl ) {
previewer.previewUrl.unbind( previewer.refresh );
previewer.previewUrl.set( data.currentUrl );
previewer.previewUrl.bind( previewer.refresh );
}

/*
* Walk over all panels, sections, and controls and set their
* respective active states to true if the preview explicitly
* indicates as such.
*/
constructs = {
panel: data.activePanels,
section: data.activeSections,
control: data.activeControls
};
_( constructs ).each( function ( activeConstructs, type ) {
api[ type ].each( function ( construct, id ) {
var isDynamicallyCreated = _.isUndefined( api.settings[ type + 's' ][ id ] );

/*
* If the construct was created statically in PHP (not dynamically in JS)
* then consider a missing (undefined) value in the activeConstructs to
* mean it should be deactivated (since it is gone). But if it is
* dynamically created then only toggle activation if the value is defined,
* as this means that the construct was also then correspondingly
* created statically in PHP and the active callback is available.
* Otherwise, dynamically-created constructs should normally have
* their active states toggled in JS rather than from PHP.
*/
if ( ! isDynamicallyCreated || ! _.isUndefined( activeConstructs[ id ] ) ) {
if ( activeConstructs[ id ] ) {
construct.activate();
} else {
construct.deactivate();
}
}
} );
} );

if ( data.settingValidities ) {
api._handleSettingValidities( {
settingValidities: data.settingValidities,
focusInvalidControl: false
} );
}
},

/**
* Keep the preview alive by listening for ready and keep-alive messages.
*
* If a message is not received in the allotted time then the iframe will be set back to the last known valid URL.
*
* @since 4.7.0
* @access public
*
* @return {void}
*/
keepPreviewAlive: function keepPreviewAlive() {
var previewer = this, keepAliveTick, timeoutId, handleMissingKeepAlive, scheduleKeepAliveCheck;

/**
* Schedule a preview keep-alive check.
*
* Note that if a page load takes longer than keepAliveCheck milliseconds,
* the keep-alive messages will still be getting sent from the previous
* URL.
*/
scheduleKeepAliveCheck = function() {
timeoutId = setTimeout( handleMissingKeepAlive, api.settings.timeouts.keepAliveCheck );
};

/**
* Set the previewerAlive state to true when receiving a message from the preview.
*/
keepAliveTick = function() {
api.state( 'previewerAlive' ).set( true );
clearTimeout( timeoutId );
scheduleKeepAliveCheck();
};

/**
* Set the previewerAlive state to false if keepAliveCheck milliseconds have transpired without a message.
*
* This is most likely to happen in the case of a connectivity error, or if the theme causes the browser
* to navigate to a non-allowed URL. Setting this state to false will force settings with a postMessage
* transport to use refresh instead, causing the preview frame also to be replaced with the current
* allowed preview URL.
*/
handleMissingKeepAlive = function() {
api.state( 'previewerAlive' ).set( false );
};
scheduleKeepAliveCheck();

previewer.bind( 'ready', keepAliveTick );
previewer.bind( 'keep-alive', keepAliveTick );
},

/**
* Query string data sent with each preview request.
*
* @abstract
*/
query: function() {},

abort: function() {
if ( this.loading ) {
this.loading.destroy();
delete this.loading;
}
},

/**
* Refresh the preview seamlessly.
*
* @since 3.4.0
* @access public
*
* @return {void}
*/
refresh: function() {
var previewer = this, onSettingChange;

// Display loading indicator.
previewer.send( 'loading-initiated' );

previewer.abort();

previewer.loading = new api.PreviewFrame({
url: previewer.url(),
previewUrl: previewer.previewUrl(),
query: previewer.query( { excludeCustomizedSaved: true } ) || {},
container: previewer.container
});

previewer.settingsModifiedWhileLoading = {};
onSettingChange = function( setting ) {
previewer.settingsModifiedWhileLoading[ setting.id ] = true;
};
api.bind( 'change', onSettingChange );
previewer.loading.always( function() {
api.unbind( 'change', onSettingChange );
} );

previewer.loading.done( function( readyData ) {
var loadingFrame = this, onceSynced;

previewer.preview = loadingFrame;
previewer.targetWindow( loadingFrame.targetWindow() );
previewer.channel( loadingFrame.channel() );

onceSynced = function() {
loadingFrame.unbind( 'synced', onceSynced );
if ( previewer._previousPreview ) {
previewer._previousPreview.destroy();
}
previewer._previousPreview = previewer.preview;
previewer.deferred.active.resolve();
delete previewer.loading;
};
loadingFrame.bind( 'synced', onceSynced );

// This event will be received directly by the previewer in normal navigation; this is only needed for seamless refresh.
previewer.trigger( 'ready', readyData );
});

previewer.loading.fail( function( reason ) {
previewer.send( 'loading-failed' );

if ( 'logged out' === reason ) {
if ( previewer.preview ) {
previewer.preview.destroy();
delete previewer.preview;
}

previewer.login().done( previewer.refresh );
}

if ( 'cheatin' === reason ) {
previewer.cheatin();
}
});
},

login: function() {
var previewer = this,
deferred, messenger, iframe;

if ( this._login ) {
return this._login;
}

deferred = $.Deferred();
this._login = deferred.promise();

messenger = new api.Messenger({
channel: 'login',
url: api.settings.url.login
});

iframe = $( '<iframe />', { 'src': api.settings.url.login, 'title': api.l10n.loginIframeTitle } ).appendTo( this.container );

messenger.targetWindow( iframe[0].contentWindow );

messenger.bind( 'login', function () {
var refreshNonces = previewer.refreshNonces();

refreshNonces.always( function() {
iframe.remove();
messenger.destroy();
delete previewer._login;
});

refreshNonces.done( function() {
deferred.resolve();
});

refreshNonces.fail( function() {
previewer.cheatin();
deferred.reject();
});
});

return this._login;
},

cheatin: function() {
$( document.body ).empty().addClass( 'cheatin' ).append(
'<h1>' + api.l10n.notAllowedHeading + '</h1>' +
'<p>' + api.l10n.notAllowed + '</p>'
);
},

refreshNonces: function() {
var request, deferred = $.Deferred();

deferred.promise();

request = wp.ajax.post( 'customize_refresh_nonces', {
wp_customize: 'on',
customize_theme: api.settings.theme.stylesheet
});

request.done( function( response ) {
api.trigger( 'nonce-refresh', response );
deferred.resolve();
});

request.fail( function() {
deferred.reject();
});

return deferred;
}
});

api.settingConstructor = {};
api.controlConstructor = {
color: api.ColorControl,
media: api.MediaControl,
upload: api.UploadControl,
image: api.ImageControl,
cropped_image: api.CroppedImageControl,
site_icon: api.SiteIconControl,
header: api.HeaderControl,
background: api.BackgroundControl,
background_position: api.BackgroundPositionControl,
theme: api.ThemeControl,
date_time: api.DateTimeControl,
code_editor: api.CodeEditorControl
};
api.panelConstructor = {
themes: api.ThemesPanel
};
api.sectionConstructor = {
themes: api.ThemesSection,
outer: api.OuterSection
};

/**
* Handle setting_validities in an error response for the customize-save request.
*
* Add notifications to the settings and focus on the first control that has an invalid setting.
*
* @alias wp.customize._handleSettingValidities
*
* @since 4.6.0
* @private
*
* @param {Object} args
* @param {Object} args.settingValidities
* @param {boolean} [args.focusInvalidControl=false]
* @return {void}
*/
api._handleSettingValidities = function handleSettingValidities( args ) {
var invalidSettingControls, invalidSettings = [], wasFocused = false;

// Find the controls that correspond to each invalid setting.
_.each( args.settingValidities, function( validity, settingId ) {
var setting = api( settingId );
if ( setting ) {

// Add notifications for invalidities.
if ( _.isObject( validity ) ) {
_.each( validity, function( params, code ) {
var notification, existingNotification, needsReplacement = false;
notification = new api.Notification( code, _.extend( { fromServer: true }, params ) );

// Remove existing notification if already exists for code but differs in parameters.
existingNotification = setting.notifications( notification.code );
if ( existingNotification ) {
needsReplacement = notification.type !== existingNotification.type || notification.message !== existingNotification.message || ! _.isEqual( notification.data, existingNotification.data );
}
if ( needsReplacement ) {
setting.notifications.remove( code );
}

if ( ! setting.notifications.has( notification.code ) ) {
setting.notifications.add( notification );
}
invalidSettings.push( setting.id );
} );
}

// Remove notification errors that are no longer valid.
setting.notifications.each( function( notification ) {
if ( notification.fromServer && 'error' === notification.type && ( true === validity || ! validity[ notification.code ] ) ) {
setting.notifications.remove( notification.code );
}
} );
}
} );

if ( args.focusInvalidControl ) {
invalidSettingControls = api.findControlsForSettings( invalidSettings );

// Focus on the first control that is inside of an expanded section (one that is visible).
_( _.values( invalidSettingControls ) ).find( function( controls ) {
return _( controls ).find( function( control ) {
var isExpanded = control.section() && api.section.has( control.section() ) && api.section( control.section() ).expanded();
if ( isExpanded && control.expanded ) {
isExpanded = control.expanded();
}
if ( isExpanded ) {
control.focus();
wasFocused = true;
}
return wasFocused;
} );
} );

// Focus on the first invalid control.
if ( ! wasFocused && ! _.isEmpty( invalidSettingControls ) ) {
_.values( invalidSettingControls )[0][0].focus();
}
}
};

/**
* Find all controls associated with the given settings.
*
* @alias wp.customize.findControlsForSettings
*
* @since 4.6.0
* @param {string[]} settingIds Setting IDs.
* @return {Object<string, wp.customize.Control>} Mapping setting ids to arrays of controls.
*/
api.findControlsForSettings = function findControlsForSettings( settingIds ) {
var controls = {}, settingControls;
_.each( _.unique( settingIds ), function( settingId ) {
var setting = api( settingId );
if ( setting ) {
settingControls = setting.findControls();
if ( settingControls && settingControls.length > 0 ) {
controls[ settingId ] = settingControls;
}
}
} );
return controls;
};

/**
* Sort panels, sections, controls by priorities. Hide empty sections and panels.
*
* @alias wp.customize.reflowPaneContents
*
* @since 4.1.0
*/
api.reflowPaneContents = _.bind( function () {

var appendContainer, activeElement, rootHeadContainers, rootNodes = [], wasReflowed = false;

if ( document.activeElement ) {
activeElement = $( document.activeElement );
}

// Sort the sections within each panel.
api.panel.each( function ( panel ) {
if ( 'themes' === panel.id ) {
return; // Don't reflow theme sections, as doing so moves them after the themes container.
}

var sections = panel.sections(),
sectionHeadContainers = _.pluck( sections, 'headContainer' );
rootNodes.push( panel );
appendContainer = ( panel.contentContainer.is( 'ul' ) ) ? panel.contentContainer : panel.contentContainer.find( 'ul:first' );
if ( ! api.utils.areElementListsEqual( sectionHeadContainers, appendContainer.children( '[id]' ) ) ) {
_( sections ).each( function ( section ) {
appendContainer.append( section.headContainer );
} );
wasReflowed = true;
}
} );

// Sort the controls within each section.
api.section.each( function ( section ) {
var controls = section.controls(),
controlContainers = _.pluck( controls, 'container' );
if ( ! section.panel() ) {
rootNodes.push( section );
}
appendContainer = ( section.contentContainer.is( 'ul' ) ) ? section.contentContainer : section.contentContainer.find( 'ul:first' );
if ( ! api.utils.areElementListsEqual( controlContainers, appendContainer.children( '[id]' ) ) ) {
_( controls ).each( function ( control ) {
appendContainer.append( control.container );
} );
wasReflowed = true;
}
} );

// Sort the root panels and sections.
rootNodes.sort( api.utils.prioritySort );
rootHeadContainers = _.pluck( rootNodes, 'headContainer' );
appendContainer = $( '#customize-theme-controls .customize-pane-parent' ); // @todo This should be defined elsewhere, and to be configurable.
if ( ! api.utils.areElementListsEqual( rootHeadContainers, appendContainer.children() ) ) {
_( rootNodes ).each( function ( rootNode ) {
appendContainer.append( rootNode.headContainer );
} );
wasReflowed = true;
}

// Now re-trigger the active Value callbacks so that the panels and sections can decide whether they can be rendered.
api.panel.each( function ( panel ) {
var value = panel.active();
panel.active.callbacks.fireWith( panel.active, [ value, value ] );
} );
api.section.each( function ( section ) {
var value = section.active();
section.active.callbacks.fireWith( section.active, [ value, value ] );
} );

// Restore focus if there was a reflow and there was an active (focused) element.
if ( wasReflowed && activeElement ) {
activeElement.trigger( 'focus' );
}
api.trigger( 'pane-contents-reflowed' );
}, api );

// Define state values.
api.state = new api.Values();
_.each( [
'saved',
'saving',
'trashing',
'activated',
'processing',
'paneVisible',
'expandedPanel',
'expandedSection',
'changesetDate',
'selectedChangesetDate',
'changesetStatus',
'selectedChangesetStatus',
'remainingTimeToPublish',
'previewerAlive',
'editShortcutVisibility',
'changesetLocked',
'previewedDevice'
], function( name ) {
api.state.create( name );
});

$( function() {
api.settings = window._wpCustomizeSettings;
api.l10n = window._wpCustomizeControlsL10n;

// Check if we can run the Customizer.
if ( ! api.settings ) {
return;
}

// Bail if any incompatibilities are found.
if ( ! $.support.postMessage || ( ! $.support.cors && api.settings.isCrossDomain ) ) {
return;
}

if ( null === api.PreviewFrame.prototype.sensitivity ) {
api.PreviewFrame.prototype.sensitivity = api.settings.timeouts.previewFrameSensitivity;
}
if ( null === api.Previewer.prototype.refreshBuffer ) {
api.Previewer.prototype.refreshBuffer = api.settings.timeouts.windowRefresh;
}

var parent,
body = $( document.body ),
overlay = body.children( '.wp-full-overlay' ),
title = $( '#customize-info .panel-title.site-title' ),
closeBtn = $( '.customize-controls-close' ),
saveBtn = $( '#save' ),
btnWrapper = $( '#customize-save-button-wrapper' ),
publishSettingsBtn = $( '#publish-settings' ),
footerActions = $( '#customize-footer-actions' );

// Add publish settings section in JS instead of PHP since the Customizer depends on it to function.
api.bind( 'ready', function() {
api.section.add( new api.OuterSection( 'publish_settings', {
title: api.l10n.publishSettings,
priority: 0,
active: api.settings.theme.active
} ) );
} );

// Set up publish settings section and its controls.
api.section( 'publish_settings', function( section ) {
var updateButtonsState, trashControl, updateSectionActive, isSectionActive, statusControl, dateControl, toggleDateControl, publishWhenTime, pollInterval, updateTimeArrivedPoller, cancelScheduleButtonReminder, timeArrivedPollingInterval = 1000;

trashControl = new api.Control( 'trash_changeset', {
type: 'button',
section: section.id,
priority: 30,
input_attrs: {
'class': 'button-link button-link-delete',
value: api.l10n.discardChanges
}
} );
api.control.add( trashControl );
trashControl.deferred.embedded.done( function() {
trashControl.container.find( '.button-link' ).on( 'click', function() {
if ( confirm( api.l10n.trashConfirm ) ) {
wp.customize.previewer.trash();
}
} );
} );

api.control.add( new api.PreviewLinkControl( 'changeset_preview_link', {
section: section.id,
priority: 100
} ) );

/**
* Return whether the publish settings section should be active.
*
* @return {boolean} Is section active.
*/
isSectionActive = function() {
if ( ! api.state( 'activated' ).get() ) {
return false;
}
if ( api.state( 'trashing' ).get() || 'trash' === api.state( 'changesetStatus' ).get() ) {
return false;
}
if ( '' === api.state( 'changesetStatus' ).get() && api.state( 'saved' ).get() ) {
return false;
}
return true;
};

// Make sure publish settings are not available while the theme is not active and the customizer is in a published state.
section.active.validate = isSectionActive;
updateSectionActive = function() {
section.active.set( isSectionActive() );
};
api.state( 'activated' ).bind( updateSectionActive );
api.state( 'trashing' ).bind( updateSectionActive );
api.state( 'saved' ).bind( updateSectionActive );
api.state( 'changesetStatus' ).bind( updateSectionActive );
updateSectionActive();

// Bind visibility of the publish settings button to whether the section is active.
updateButtonsState = function() {
publishSettingsBtn.toggle( section.active.get() );
saveBtn.toggleClass( 'has-next-sibling', section.active.get() );
};
updateButtonsState();
section.active.bind( updateButtonsState );

function highlightScheduleButton() {
if ( ! cancelScheduleButtonReminder ) {
cancelScheduleButtonReminder = api.utils.highlightButton( btnWrapper, {
delay: 1000,

/*
* Only abort the reminder when the save button is focused.
* If the user clicks the settings button to toggle the
* settings closed, we'll still remind them.
*/
focusTarget: saveBtn
} );
}
}
function cancelHighlightScheduleButton() {
if ( cancelScheduleButtonReminder ) {
cancelScheduleButtonReminder();
cancelScheduleButtonReminder = null;
}
}
api.state( 'selectedChangesetStatus' ).bind( cancelHighlightScheduleButton );

section.contentContainer.find( '.customize-action' ).text( api.l10n.updating );
section.contentContainer.find( '.customize-section-back' ).removeAttr( 'tabindex' );
publishSettingsBtn.prop( 'disabled', false );

publishSettingsBtn.on( 'click', function( event ) {
event.preventDefault();
section.expanded.set( ! section.expanded.get() );
} );

section.expanded.bind( function( isExpanded ) {
var defaultChangesetStatus;
publishSettingsBtn.attr( 'aria-expanded', String( isExpanded ) );
publishSettingsBtn.toggleClass( 'active', isExpanded );

if ( isExpanded ) {
cancelHighlightScheduleButton();
return;
}

defaultChangesetStatus = api.state( 'changesetStatus' ).get();
if ( '' === defaultChangesetStatus || 'auto-draft' === defaultChangesetStatus ) {
defaultChangesetStatus = 'publish';
}

if ( api.state( 'selectedChangesetStatus' ).get() !== defaultChangesetStatus ) {
highlightScheduleButton();
} else if ( 'future' === api.state( 'selectedChangesetStatus' ).get() && api.state( 'selectedChangesetDate' ).get() !== api.state( 'changesetDate' ).get() ) {
highlightScheduleButton();
}
} );

statusControl = new api.Control( 'changeset_status', {
priority: 10,
type: 'radio',
section: 'publish_settings',
setting: api.state( 'selectedChangesetStatus' ),
templateId: 'customize-selected-changeset-status-control',
label: api.l10n.action,
choices: api.settings.changeset.statusChoices
} );
api.control.add( statusControl );

dateControl = new api.DateTimeControl( 'changeset_scheduled_date', {
priority: 20,
section: 'publish_settings',
setting: api.state( 'selectedChangesetDate' ),
minYear: ( new Date() ).getFullYear(),
allowPastDate: false,
includeTime: true,
twelveHourFormat: /a/i.test( api.settings.timeFormat ),
description: api.l10n.scheduleDescription
} );
dateControl.notifications.alt = true;
api.control.add( dateControl );

publishWhenTime = function() {
api.state( 'selectedChangesetStatus' ).set( 'publish' );
api.previewer.save();
};

// Start countdown for when the dateTime arrives, or clear interval when it is .
updateTimeArrivedPoller = function() {
var shouldPoll = (
'future' === api.state( 'changesetStatus' ).get() &&
'future' === api.state( 'selectedChangesetStatus' ).get() &&
api.state( 'changesetDate' ).get() &&
api.state( 'selectedChangesetDate' ).get() === api.state( 'changesetDate' ).get() &&
api.utils.getRemainingTime( api.state( 'changesetDate' ).get() ) >= 0
);

if ( shouldPoll && ! pollInterval ) {
pollInterval = setInterval( function() {
var remainingTime = api.utils.getRemainingTime( api.state( 'changesetDate' ).get() );
api.state( 'remainingTimeToPublish' ).set( remainingTime );
if ( remainingTime <= 0 ) {
clearInterval( pollInterval );
pollInterval = 0;
publishWhenTime();
}
}, timeArrivedPollingInterval );
} else if ( ! shouldPoll && pollInterval ) {
clearInterval( pollInterval );
pollInterval = 0;
}
};

api.state( 'changesetDate' ).bind( updateTimeArrivedPoller );
api.state( 'selectedChangesetDate' ).bind( updateTimeArrivedPoller );
api.state( 'changesetStatus' ).bind( updateTimeArrivedPoller );
api.state( 'selectedChangesetStatus' ).bind( updateTimeArrivedPoller );
updateTimeArrivedPoller();

// Ensure dateControl only appears when selected status is future.
dateControl.active.validate = function() {
return 'future' === api.state( 'selectedChangesetStatus' ).get();
};
toggleDateControl = function( value ) {
dateControl.active.set( 'future' === value );
};
toggleDateControl( api.state( 'selectedChangesetStatus' ).get() );
api.state( 'selectedChangesetStatus' ).bind( toggleDateControl );

// Show notification on date control when status is future but it isn't a future date.
api.state( 'saving' ).bind( function( isSaving ) {
if ( isSaving && 'future' === api.state( 'selectedChangesetStatus' ).get() ) {
dateControl.toggleFutureDateNotification( ! dateControl.isFutureDate() );
}
} );
} );

// Prevent the form from saving when enter is pressed on an input or select element.
$('#customize-controls').on( 'keydown', function( e ) {
var isEnter = ( 13 === e.which ),
$el = $( e.target );

if ( isEnter && ( $el.is( 'input:not([type=button])' ) || $el.is( 'select' ) ) ) {
e.preventDefault();
}
});

// Expand/Collapse the main customizer customize info.
$( '.customize-info' ).find( '> .accordion-section-title .customize-help-toggle' ).on( 'click', function() {
var section = $( this ).closest( '.accordion-section' ),
content = section.find( '.customize-panel-description:first' );

if ( section.hasClass( 'cannot-expand' ) ) {
return;
}

if ( section.hasClass( 'open' ) ) {
section.toggleClass( 'open' );
content.slideUp( api.Panel.prototype.defaultExpandedArguments.duration, function() {
content.trigger( 'toggled' );
} );
$( this ).attr( 'aria-expanded', false );
} else {
content.slideDown( api.Panel.prototype.defaultExpandedArguments.duration, function() {
content.trigger( 'toggled' );
} );
section.toggleClass( 'open' );
$( this ).attr( 'aria-expanded', true );
}
});

/**
* Initialize Previewer
*
* @alias wp.customize.previewer
*/
api.previewer = new api.Previewer({
container: '#customize-preview',
form: '#customize-controls',
previewUrl: api.settings.url.preview,
allowedUrls: api.settings.url.allowed
},/** @lends wp.customize.previewer */{

nonce: api.settings.nonce,

/**
* Build the query to send along with the Preview request.
*
* @since 3.4.0
* @since 4.7.0 Added options param.
* @access public
*
* @param {Object} [options] Options.
* @param {boolean} [options.excludeCustomizedSaved=false] Exclude saved settings in customized response (values pending writing to changeset).
* @return {Object} Query vars.
*/
query: function( options ) {
var queryVars = {
wp_customize: 'on',
customize_theme: api.settings.theme.stylesheet,
nonce: this.nonce.preview,
customize_changeset_uuid: api.settings.changeset.uuid
};
if ( api.settings.changeset.autosaved || ! api.state( 'saved' ).get() ) {
queryVars.customize_autosaved = 'on';
}

/*
* Exclude customized data if requested especially for calls to requestChangesetUpdate.
* Changeset updates are differential and so it is a performance waste to send all of
* the dirty settings with each update.
*/
queryVars.customized = JSON.stringify( api.dirtyValues( {
unsaved: options && options.excludeCustomizedSaved
} ) );

return queryVars;
},

/**
* Save (and publish) the customizer changeset.
*
* Updates to the changeset are transactional. If any of the settings
* are invalid then none of them will be written into the changeset.
* A revision will be made for the changeset post if revisions support
* has been added to the post type.
*
* @since 3.4.0
* @since 4.7.0 Added args param and return value.
*
* @param {Object} [args] Args.
* @param {string} [args.status=publish] Status.
* @param {string} [args.date] Date, in local time in MySQL format.
* @param {string} [args.title] Title
* @return {jQuery.promise} Promise.
*/
save: function( args ) {
var previewer = this,
deferred = $.Deferred(),
changesetStatus = api.state( 'selectedChangesetStatus' ).get(),
selectedChangesetDate = api.state( 'selectedChangesetDate' ).get(),
processing = api.state( 'processing' ),
submitWhenDoneProcessing,
submit,
modifiedWhileSaving = {},
invalidSettings = [],
invalidControls = [],
invalidSettingLessControls = [];

if ( args && args.status ) {
changesetStatus = args.status;
}

if ( api.state( 'saving' ).get() ) {
deferred.reject( 'already_saving' );
deferred.promise();
}

api.state( 'saving' ).set( true );

function captureSettingModifiedDuringSave( setting ) {
modifiedWhileSaving[ setting.id ] = true;
}

submit = function () {
var request, query, settingInvalidities = {}, latestRevision = api._latestRevision, errorCode = 'client_side_error';

api.bind( 'change', captureSettingModifiedDuringSave );
api.notifications.remove( errorCode );

/*
* Block saving if there are any settings that are marked as
* invalid from the client (not from the server). Focus on
* the control.
*/
api.each( function( setting ) {
setting.notifications.each( function( notification ) {
if ( 'error' === notification.type && ! notification.fromServer ) {
invalidSettings.push( setting.id );
if ( ! settingInvalidities[ setting.id ] ) {
settingInvalidities[ setting.id ] = {};
}
settingInvalidities[ setting.id ][ notification.code ] = notification;
}
} );
} );

// Find all invalid setting less controls with notification type error.
api.control.each( function( control ) {
if ( ! control.setting || ! control.setting.id && control.active.get() ) {
control.notifications.each( function( notification ) {
if ( 'error' === notification.type ) {
invalidSettingLessControls.push( [ control ] );
}
} );
}
} );

invalidControls = _.union( invalidSettingLessControls, _.values( api.findControlsForSettings( invalidSettings ) ) );
if ( ! _.isEmpty( invalidControls ) ) {

invalidControls[0][0].focus();
api.unbind( 'change', captureSettingModifiedDuringSave );

if ( invalidSettings.length ) {
api.notifications.add( new api.Notification( errorCode, {
message: ( 1 === invalidSettings.length ? api.l10n.saveBlockedError.singular : api.l10n.saveBlockedError.plural ).replace( /%s/g, String( invalidSettings.length ) ),
type: 'error',
dismissible: true,
saveFailure: true
} ) );
}

deferred.rejectWith( previewer, [
{ setting_invalidities: settingInvalidities }
] );
api.state( 'saving' ).set( false );
return deferred.promise();
}

/*
* Note that excludeCustomizedSaved is intentionally false so that the entire
* set of customized data will be included if bypassed changeset update.
*/
query = $.extend( previewer.query( { excludeCustomizedSaved: false } ), {
nonce: previewer.nonce.save,
customize_changeset_status: changesetStatus
} );

if ( args && args.date ) {
query.customize_changeset_date = args.date;
} else if ( 'future' === changesetStatus && selectedChangesetDate ) {
query.customize_changeset_date = selectedChangesetDate;
}

if ( args && args.title ) {
query.customize_changeset_title = args.title;
}

// Allow plugins to modify the params included with the save request.
api.trigger( 'save-request-params', query );

/*
* Note that the dirty customized values will have already been set in the
* changeset and so technically query.customized could be deleted. However,
* it is remaining here to make sure that any settings that got updated
* quietly which may have not triggered an update request will also get
* included in the values that get saved to the changeset. This will ensure
* that values that get injected via the saved event will be included in
* the changeset. This also ensures that setting values that were invalid
* will get re-validated, perhaps in the case of settings that are invalid
* due to dependencies on other settings.
*/
request = wp.ajax.post( 'customize_save', query );
api.state( 'processing' ).set( api.state( 'processing' ).get() + 1 );

api.trigger( 'save', request );

request.always( function () {
api.state( 'processing' ).set( api.state( 'processing' ).get() - 1 );
api.state( 'saving' ).set( false );
api.unbind( 'change', captureSettingModifiedDuringSave );
} );

// Remove notifications that were added due to save failures.
api.notifications.each( function( notification ) {
if ( notification.saveFailure ) {
api.notifications.remove( notification.code );
}
});

request.fail( function ( response ) {
var notification, notificationArgs;
notificationArgs = {
type: 'error',
dismissible: true,
fromServer: true,
saveFailure: true
};

if ( '0' === response ) {
response = 'not_logged_in';
} else if ( '-1' === response ) {
// Back-compat in case any other check_ajax_referer() call is dying.
response = 'invalid_nonce';
}

if ( 'invalid_nonce' === response ) {
previewer.cheatin();
} else if ( 'not_logged_in' === response ) {
previewer.preview.iframe.hide();
previewer.login().done( function() {
previewer.save();
previewer.preview.iframe.show();
} );
} else if ( response.code ) {
if ( 'not_future_date' === response.code && api.section.has( 'publish_settings' ) && api.section( 'publish_settings' ).active.get() && api.control.has( 'changeset_scheduled_date' ) ) {
api.control( 'changeset_scheduled_date' ).toggleFutureDateNotification( true ).focus();
} else if ( 'changeset_locked' !== response.code ) {
notification = new api.Notification( response.code, _.extend( notificationArgs, {
message: response.message
} ) );
}
} else {
notification = new api.Notification( 'unknown_error', _.extend( notificationArgs, {
message: api.l10n.unknownRequestFail
} ) );
}

if ( notification ) {
api.notifications.add( notification );
}

if ( response.setting_validities ) {
api._handleSettingValidities( {
settingValidities: response.setting_validities,
focusInvalidControl: true
} );
}

deferred.rejectWith( previewer, [ response ] );
api.trigger( 'error', response );

// Start a new changeset if the underlying changeset was published.
if ( 'changeset_already_published' === response.code && response.next_changeset_uuid ) {
api.settings.changeset.uuid = response.next_changeset_uuid;
api.state( 'changesetStatus' ).set( '' );
if ( api.settings.changeset.branching ) {
parent.send( 'changeset-uuid', api.settings.changeset.uuid );
}
api.previewer.send( 'changeset-uuid', api.settings.changeset.uuid );
}
} );

request.done( function( response ) {

previewer.send( 'saved', response );

api.state( 'changesetStatus' ).set( response.changeset_status );
if ( response.changeset_date ) {
api.state( 'changesetDate' ).set( response.changeset_date );
}

if ( 'publish' === response.changeset_status ) {

// Mark all published as clean if they haven't been modified during the request.
api.each( function( setting ) {
/*
* Note that the setting revision will be undefined in the case of setting
* values that are marked as dirty when the customizer is loaded, such as
* when applying starter content. All other dirty settings will have an
* associated revision due to their modification triggering a change event.
*/
if ( setting._dirty && ( _.isUndefined( api._latestSettingRevisions[ setting.id ] ) || api._latestSettingRevisions[ setting.id ] <= latestRevision ) ) {
setting._dirty = false;
}
} );

api.state( 'changesetStatus' ).set( '' );
api.settings.changeset.uuid = response.next_changeset_uuid;
if ( api.settings.changeset.branching ) {
parent.send( 'changeset-uuid', api.settings.changeset.uuid );
}
}

// Prevent subsequent requestChangesetUpdate() calls from including the settings that have been saved.
api._lastSavedRevision = Math.max( latestRevision, api._lastSavedRevision );

if ( response.setting_validities ) {
api._handleSettingValidities( {
settingValidities: response.setting_validities,
focusInvalidControl: true
} );
}

deferred.resolveWith( previewer, [ response ] );
api.trigger( 'saved', response );

// Restore the global dirty state if any settings were modified during save.
if ( ! _.isEmpty( modifiedWhileSaving ) ) {
api.state( 'saved' ).set( false );
}
} );
};

if ( 0 === processing() ) {
submit();
} else {
submitWhenDoneProcessing = function () {
if ( 0 === processing() ) {
api.state.unbind( 'change', submitWhenDoneProcessing );
submit();
}
};
api.state.bind( 'change', submitWhenDoneProcessing );
}

return deferred.promise();
},

/**
* Trash the current changes.
*
* Revert the Customizer to its previously-published state.
*
* @since 4.9.0
*
* @return {jQuery.promise} Promise.
*/
trash: function trash() {
var request, success, fail;

api.state( 'trashing' ).set( true );
api.state( 'processing' ).set( api.state( 'processing' ).get() + 1 );

request = wp.ajax.post( 'customize_trash', {
customize_changeset_uuid: api.settings.changeset.uuid,
nonce: api.settings.nonce.trash
} );
api.notifications.add( new api.OverlayNotification( 'changeset_trashing', {
type: 'info',
message: api.l10n.revertingChanges,
loading: true
} ) );

success = function() {
var urlParser = document.createElement( 'a' ), queryParams;

api.state( 'changesetStatus' ).set( 'trash' );
api.each( function( setting ) {
setting._dirty = false;
} );
api.state( 'saved' ).set( true );

// Go back to Customizer without changeset.
urlParser.href = location.href;
queryParams = api.utils.parseQueryString( urlParser.search.substr( 1 ) );
delete queryParams.changeset_uuid;
queryParams['return'] = api.settings.url['return'];
urlParser.search = $.param( queryParams );
location.replace( urlParser.href );
};

fail = function( code, message ) {
var notificationCode = code || 'unknown_error';
api.state( 'processing' ).set( api.state( 'processing' ).get() - 1 );
api.state( 'trashing' ).set( false );
api.notifications.remove( 'changeset_trashing' );
api.notifications.add( new api.Notification( notificationCode, {
message: message || api.l10n.unknownError,
dismissible: true,
type: 'error'
} ) );
};

request.done( function( response ) {
success( response.message );
} );

request.fail( function( response ) {
var code = response.code || 'trashing_failed';
if ( response.success || 'non_existent_changeset' === code || 'changeset_already_trashed' === code ) {
success( response.message );
} else {
fail( code, response.message );
}
} );
},

/**
* Builds the front preview URL with the current state of customizer.
*
* @since 4.9.0
*
* @return {string} Preview URL.
*/
getFrontendPreviewUrl: function() {
var previewer = this, params, urlParser;
urlParser = document.createElement( 'a' );
urlParser.href = previewer.previewUrl.get();
params = api.utils.parseQueryString( urlParser.search.substr( 1 ) );

if ( api.state( 'changesetStatus' ).get() && 'publish' !== api.state( 'changesetStatus' ).get() ) {
params.customize_changeset_uuid = api.settings.changeset.uuid;
}
if ( ! api.state( 'activated' ).get() ) {
params.customize_theme = api.settings.theme.stylesheet;
}

urlParser.search = $.param( params );
return urlParser.href;
}
});

// Ensure preview nonce is included with every customized request, to allow post data to be read.
$.ajaxPrefilter( function injectPreviewNonce( options ) {
if ( ! /wp_customize=on/.test( options.data ) ) {
return;
}
options.data += '&' + $.param({
customize_preview_nonce: api.settings.nonce.preview
});
});

// Refresh the nonces if the preview sends updated nonces over.
api.previewer.bind( 'nonce', function( nonce ) {
$.extend( this.nonce, nonce );
});

// Refresh the nonces if login sends updated nonces over.
api.bind( 'nonce-refresh', function( nonce ) {
$.extend( api.settings.nonce, nonce );
$.extend( api.previewer.nonce, nonce );
api.previewer.send( 'nonce-refresh', nonce );
});

// Create Settings.
$.each( api.settings.settings, function( id, data ) {
var Constructor = api.settingConstructor[ data.type ] || api.Setting;
api.add( new Constructor( id, data.value, {
transport: data.transport,
previewer: api.previewer,
dirty: !! data.dirty
} ) );
});

// Create Panels.
$.each( api.settings.panels, function ( id, data ) {
var Constructor = api.panelConstructor[ data.type ] || api.Panel, options;
// Inclusion of params alias is for back-compat for custom panels that expect to augment this property.
options = _.extend( { params: data }, data );
api.panel.add( new Constructor( id, options ) );
});

// Create Sections.
$.each( api.settings.sections, function ( id, data ) {
var Constructor = api.sectionConstructor[ data.type ] || api.Section, options;
// Inclusion of params alias is for back-compat for custom sections that expect to augment this property.
options = _.extend( { params: data }, data );
api.section.add( new Constructor( id, options ) );
});

// Create Controls.
$.each( api.settings.controls, function( id, data ) {
var Constructor = api.controlConstructor[ data.type ] || api.Control, options;
// Inclusion of params alias is for back-compat for custom controls that expect to augment this property.
options = _.extend( { params: data }, data );
api.control.add( new Constructor( id, options ) );
});

// Focus the autofocused element.
_.each( [ 'panel', 'section', 'control' ], function( type ) {
var id = api.settings.autofocus[ type ];
if ( ! id ) {
return;
}

/*
* Defer focus until:
* 1. The panel, section, or control exists (especially for dynamically-created ones).
* 2. The instance is embedded in the document (and so is focusable).
* 3. The preview has finished loading so that the active states have been set.
*/
api[ type ]( id, function( instance ) {
instance.deferred.embedded.done( function() {
api.previewer.deferred.active.done( function() {
instance.focus();
});
});
});
});

api.bind( 'ready', api.reflowPaneContents );
$( [ api.panel, api.section, api.control ] ).each( function ( i, values ) {
var debouncedReflowPaneContents = _.debounce( api.reflowPaneContents, api.settings.timeouts.reflowPaneContents );
values.bind( 'add', debouncedReflowPaneContents );
values.bind( 'change', debouncedReflowPaneContents );
values.bind( 'remove', debouncedReflowPaneContents );
} );

// Set up global notifications area.
api.bind( 'ready', function setUpGlobalNotificationsArea() {
var sidebar, containerHeight, containerInitialTop;
api.notifications.container = $( '#customize-notifications-area' );

api.notifications.bind( 'change', _.debounce( function() {
api.notifications.render();
} ) );

sidebar = $( '.wp-full-overlay-sidebar-content' );
api.notifications.bind( 'rendered', function updateSidebarTop() {
sidebar.css( 'top', '' );
if ( 0 !== api.notifications.count() ) {
containerHeight = api.notifications.container.outerHeight() + 1;
containerInitialTop = parseInt( sidebar.css( 'top' ), 10 );
sidebar.css( 'top', containerInitialTop + containerHeight + 'px' );
}
api.notifications.trigger( 'sidebarTopUpdated' );
});

api.notifications.render();
});

// Save and activated states.
(function( state ) {
var saved = state.instance( 'saved' ),
saving = state.instance( 'saving' ),
trashing = state.instance( 'trashing' ),
activated = state.instance( 'activated' ),
processing = state.instance( 'processing' ),
paneVisible = state.instance( 'paneVisible' ),
expandedPanel = state.instance( 'expandedPanel' ),
expandedSection = state.instance( 'expandedSection' ),
changesetStatus = state.instance( 'changesetStatus' ),
selectedChangesetStatus = state.instance( 'selectedChangesetStatus' ),
changesetDate = state.instance( 'changesetDate' ),
selectedChangesetDate = state.instance( 'selectedChangesetDate' ),
previewerAlive = state.instance( 'previewerAlive' ),
editShortcutVisibility = state.instance( 'editShortcutVisibility' ),
changesetLocked = state.instance( 'changesetLocked' ),
populateChangesetUuidParam, defaultSelectedChangesetStatus;

state.bind( 'change', function() {
var canSave;

if ( ! activated() ) {
saveBtn.val( api.l10n.activate );
closeBtn.find( '.screen-reader-text' ).text( api.l10n.cancel );

} else if ( '' === changesetStatus.get() && saved() ) {
if ( api.settings.changeset.currentUserCanPublish ) {
saveBtn.val( api.l10n.published );
} else {
saveBtn.val( api.l10n.saved );
}
closeBtn.find( '.screen-reader-text' ).text( api.l10n.close );

} else {
if ( 'draft' === selectedChangesetStatus() ) {
if ( saved() && selectedChangesetStatus() === changesetStatus() ) {
saveBtn.val( api.l10n.draftSaved );
} else {
saveBtn.val( api.l10n.saveDraft );
}
} else if ( 'future' === selectedChangesetStatus() ) {
if ( saved() && selectedChangesetStatus() === changesetStatus() ) {
if ( changesetDate.get() !== selectedChangesetDate.get() ) {
saveBtn.val( api.l10n.schedule );
} else {
saveBtn.val( api.l10n.scheduled );
}
} else {
saveBtn.val( api.l10n.schedule );
}
} else if ( api.settings.changeset.currentUserCanPublish ) {
saveBtn.val( api.l10n.publish );
}
closeBtn.find( '.screen-reader-text' ).text( api.l10n.cancel );
}

/*
* Save (publish) button should be enabled if saving is not currently happening,
* and if the theme is not active or the changeset exists but is not published.
*/
canSave = ! saving() && ! trashing() && ! changesetLocked() && ( ! activated() || ! saved() || ( changesetStatus() !== selectedChangesetStatus() && '' !== changesetStatus() ) || ( 'future' === selectedChangesetStatus() && changesetDate.get() !== selectedChangesetDate.get() ) );

saveBtn.prop( 'disabled', ! canSave );
});

selectedChangesetStatus.validate = function( status ) {
if ( '' === status || 'auto-draft' === status ) {
return null;
}
return status;
};

defaultSelectedChangesetStatus = api.settings.changeset.currentUserCanPublish ? 'publish' : 'draft';

// Set default states.
changesetStatus( api.settings.changeset.status );
changesetLocked( Boolean( api.settings.changeset.lockUser ) );
changesetDate( api.settings.changeset.publishDate );
selectedChangesetDate( api.settings.changeset.publishDate );
selectedChangesetStatus( '' === api.settings.changeset.status || 'auto-draft' === api.settings.changeset.status ? defaultSelectedChangesetStatus : api.settings.changeset.status );
selectedChangesetStatus.link( changesetStatus ); // Ensure that direct updates to status on server via wp.customizer.previewer.save() will update selection.
saved( true );
if ( '' === changesetStatus() ) { // Handle case for loading starter content.
api.each( function( setting ) {
if ( setting._dirty ) {
saved( false );
}
} );
}
saving( false );
activated( api.settings.theme.active );
processing( 0 );
paneVisible( true );
expandedPanel( false );
expandedSection( false );
previewerAlive( true );
editShortcutVisibility( 'visible' );

api.bind( 'change', function() {
if ( state( 'saved' ).get() ) {
state( 'saved' ).set( false );
}
});

// Populate changeset UUID param when state becomes dirty.
if ( api.settings.changeset.branching ) {
saved.bind( function( isSaved ) {
if ( ! isSaved ) {
populateChangesetUuidParam( true );
}
});
}

saving.bind( function( isSaving ) {
body.toggleClass( 'saving', isSaving );
} );
trashing.bind( function( isTrashing ) {
body.toggleClass( 'trashing', isTrashing );
} );

api.bind( 'saved', function( response ) {
state('saved').set( true );
if ( 'publish' === response.changeset_status ) {
state( 'activated' ).set( true );
}
});

activated.bind( function( to ) {
if ( to ) {
api.trigger( 'activated' );
}
});

/**
* Populate URL with UUID via `history.replaceState()`.
*
* @since 4.7.0
* @access private
*
* @param {boolean} isIncluded Is UUID included.
* @return {void}
*/
populateChangesetUuidParam = function( isIncluded ) {
var urlParser, queryParams;

// Abort on IE9 which doesn't support history management.
if ( ! history.replaceState ) {
return;
}

urlParser = document.createElement( 'a' );
urlParser.href = location.href;
queryParams = api.utils.parseQueryString( urlParser.search.substr( 1 ) );
if ( isIncluded ) {
if ( queryParams.changeset_uuid === api.settings.changeset.uuid ) {
return;
}
queryParams.changeset_uuid = api.settings.changeset.uuid;
} else {
if ( ! queryParams.changeset_uuid ) {
return;
}
delete queryParams.changeset_uuid;
}
urlParser.search = $.param( queryParams );
history.replaceState( {}, document.title, urlParser.href );
};

// Show changeset UUID in URL when in branching mode and there is a saved changeset.
if ( api.settings.changeset.branching ) {
changesetStatus.bind( function( newStatus ) {
populateChangesetUuidParam( '' !== newStatus && 'publish' !== newStatus && 'trash' !== newStatus );
} );
}
}( api.state ) );

/**
* Handles lock notice and take over request.
*
* @since 4.9.0
*/
( function checkAndDisplayLockNotice() {

var LockedNotification = api.OverlayNotification.extend(/** @lends wp.customize~LockedNotification.prototype */{

/**
* Template ID.
*
* @type {string}
*/
templateId: 'customize-changeset-locked-notification',

/**
* Lock user.
*
* @type {object}
*/
lockUser: null,

/**
* A notification that is displayed in a full-screen overlay with information about the locked changeset.
*
* @constructs wp.customize~LockedNotification
* @augments wp.customize.OverlayNotification
*
* @since 4.9.0
*
* @param {string} [code] - Code.
* @param {Object} [params] - Params.
*/
initialize: function( code, params ) {
var notification = this, _code, _params;
_code = code || 'changeset_locked';
_params = _.extend(
{
message: '',
type: 'warning',
containerClasses: '',
lockUser: {}
},
params
);
_params.containerClasses += ' notification-changeset-locked';
api.OverlayNotification.prototype.initialize.call( notification, _code, _params );
},

/**
* Render notification.
*
* @since 4.9.0
*
* @return {jQuery} Notification container.
*/
render: function() {
var notification = this, li, data, takeOverButton, request;
data = _.extend(
{
allowOverride: false,
returnUrl: api.settings.url['return'],
previewUrl: api.previewer.previewUrl.get(),
frontendPreviewUrl: api.previewer.getFrontendPreviewUrl()
},
this
);

li = api.OverlayNotification.prototype.render.call( data );

// Try to autosave the changeset now.
api.requestChangesetUpdate( {}, { autosave: true } ).fail( function( response ) {
if ( ! response.autosaved ) {
li.find( '.notice-error' ).prop( 'hidden', false ).text( response.message || api.l10n.unknownRequestFail );
}
} );

takeOverButton = li.find( '.customize-notice-take-over-button' );
takeOverButton.on( 'click', function( event ) {
event.preventDefault();
if ( request ) {
return;
}

takeOverButton.addClass( 'disabled' );
request = wp.ajax.post( 'customize_override_changeset_lock', {
wp_customize: 'on',
customize_theme: api.settings.theme.stylesheet,
customize_changeset_uuid: api.settings.changeset.uuid,
nonce: api.settings.nonce.override_lock
} );

request.done( function() {
api.notifications.remove( notification.code ); // Remove self.
api.state( 'changesetLocked' ).set( false );
} );

request.fail( function( response ) {
var message = response.message || api.l10n.unknownRequestFail;
li.find( '.notice-error' ).prop( 'hidden', false ).text( message );

request.always( function() {
takeOverButton.removeClass( 'disabled' );
} );
} );

request.always( function() {
request = null;
} );
} );

return li;
}
});

/**
* Start lock.
*
* @since 4.9.0
*
* @param {Object} [args] - Args.
* @param {Object} [args.lockUser] - Lock user data.
* @param {boolean} [args.allowOverride=false] - Whether override is allowed.
* @return {void}
*/
function startLock( args ) {
if ( args && args.lockUser ) {
api.settings.changeset.lockUser = args.lockUser;
}
api.state( 'changesetLocked' ).set( true );
api.notifications.add( new LockedNotification( 'changeset_locked', {
lockUser: api.settings.changeset.lockUser,
allowOverride: Boolean( args && args.allowOverride )
} ) );
}

// Show initial notification.
if ( api.settings.changeset.lockUser ) {
startLock( { allowOverride: true } );
}

// Check for lock when sending heartbeat requests.
$( document ).on( 'heartbeat-send.update_lock_notice', function( event, data ) {
data.check_changeset_lock = true;
data.changeset_uuid = api.settings.changeset.uuid;
} );

// Handle heartbeat ticks.
$( document ).on( 'heartbeat-tick.update_lock_notice', function( event, data ) {
var notification, code = 'changeset_locked';
if ( ! data.customize_changeset_lock_user ) {
return;
}

// Update notification when a different user takes over.
notification = api.notifications( code );
if ( notification && notification.lockUser.id !== api.settings.changeset.lockUser.id ) {
api.notifications.remove( code );
}

startLock( {
lockUser: data.customize_changeset_lock_user
} );
} );

// Handle locking in response to changeset save errors.
api.bind( 'error', function( response ) {
if ( 'changeset_locked' === response.code && response.lock_user ) {
startLock( {
lockUser: response.lock_user
} );
}
} );
} )();

// Set up initial notifications.
(function() {
var removedQueryParams = [], autosaveDismissed = false;

/**
* Obtain the URL to restore the autosave.
*
* @return {string} Customizer URL.
*/
function getAutosaveRestorationUrl() {
var urlParser, queryParams;
urlParser = document.createElement( 'a' );
urlParser.href = location.href;
queryParams = api.utils.parseQueryString( urlParser.search.substr( 1 ) );
if ( api.settings.changeset.latestAutoDraftUuid ) {
queryParams.changeset_uuid = api.settings.changeset.latestAutoDraftUuid;
} else {
queryParams.customize_autosaved = 'on';
}
queryParams['return'] = api.settings.url['return'];
urlParser.search = $.param( queryParams );
return urlParser.href;
}

/**
* Remove parameter from the URL.
*
* @param {Array} params - Parameter names to remove.
* @return {void}
*/
function stripParamsFromLocation( params ) {
var urlParser = document.createElement( 'a' ), queryParams, strippedParams = 0;
urlParser.href = location.href;
queryParams = api.utils.parseQueryString( urlParser.search.substr( 1 ) );
_.each( params, function( param ) {
if ( 'undefined' !== typeof queryParams[ param ] ) {
strippedParams += 1;
delete queryParams[ param ];
}
} );
if ( 0 === strippedParams ) {
return;
}

urlParser.search = $.param( queryParams );
history.replaceState( {}, document.title, urlParser.href );
}

/**
* Displays a Site Editor notification when a block theme is activated.
*
* @since 4.9.0
*
* @param {string} [notification] - A notification to display.
* @return {void}
*/
function addSiteEditorNotification( notification ) {
api.notifications.add( new api.Notification( 'site_editor_block_theme_notice', {
message: notification,
type: 'info',
dismissible: false,
render: function() {
var notification = api.Notification.prototype.render.call( this ),
button = notification.find( 'button.switch-to-editor' );

button.on( 'click', function( event ) {
event.preventDefault();
location.assign( button.data( 'action' ) );
} );

return notification;
}
} ) );
}

/**
* Dismiss autosave.
*
* @return {void}
*/
function dismissAutosave() {
if ( autosaveDismissed ) {
return;
}
wp.ajax.post( 'customize_dismiss_autosave_or_lock', {
wp_customize: 'on',
customize_theme: api.settings.theme.stylesheet,
customize_changeset_uuid: api.settings.changeset.uuid,
nonce: api.settings.nonce.dismiss_autosave_or_lock,
dismiss_autosave: true
} );
autosaveDismissed = true;
}

/**
* Add notification regarding the availability of an autosave to restore.
*
* @return {void}
*/
function addAutosaveRestoreNotification() {
var code = 'autosave_available', onStateChange;

// Since there is an autosave revision and the user hasn't loaded with autosaved, add notification to prompt to load autosaved version.
api.notifications.add( new api.Notification( code, {
message: api.l10n.autosaveNotice,
type: 'warning',
dismissible: true,
render: function() {
var li = api.Notification.prototype.render.call( this ), link;

// Handle clicking on restoration link.
link = li.find( 'a' );
link.prop( 'href', getAutosaveRestorationUrl() );
link.on( 'click', function( event ) {
event.preventDefault();
location.replace( getAutosaveRestorationUrl() );
} );

// Handle dismissal of notice.
li.find( '.notice-dismiss' ).on( 'click', dismissAutosave );

return li;
}
} ) );

// Remove the notification once the user starts making changes.
onStateChange = function() {
dismissAutosave();
api.notifications.remove( code );
api.unbind( 'change', onStateChange );
api.state( 'changesetStatus' ).unbind( onStateChange );
};
api.bind( 'change', onStateChange );
api.state( 'changesetStatus' ).bind( onStateChange );
}

if ( api.settings.changeset.autosaved ) {
api.state( 'saved' ).set( false );
removedQueryParams.push( 'customize_autosaved' );
}
if ( ! api.settings.changeset.branching && ( ! api.settings.changeset.status || 'auto-draft' === api.settings.changeset.status ) ) {
removedQueryParams.push( 'changeset_uuid' ); // Remove UUID when restoring autosave auto-draft.
}
if ( removedQueryParams.length > 0 ) {
stripParamsFromLocation( removedQueryParams );
}
if ( api.settings.changeset.latestAutoDraftUuid || api.settings.changeset.hasAutosaveRevision ) {
addAutosaveRestoreNotification();
}
var shouldDisplayBlockThemeNotification = !! parseInt( $( '#customize-info' ).data( 'block-theme' ), 10 );
if (shouldDisplayBlockThemeNotification) {
addSiteEditorNotification( api.l10n.blockThemeNotification );
}
})();

// Check if preview url is valid and load the preview frame.
if ( api.previewer.previewUrl() ) {
api.previewer.refresh();
} else {
api.previewer.previewUrl( api.settings.url.home );
}

// Button bindings.
saveBtn.on( 'click', function( event ) {
api.previewer.save();
event.preventDefault();
}).on( 'keydown', function( event ) {
if ( 9 === event.which ) { // Tab.
return;
}
if ( 13 === event.which ) { // Enter.
api.previewer.save();
}
event.preventDefault();
});

closeBtn.on( 'keydown', function( event ) {
if ( 9 === event.which ) { // Tab.
return;
}
if ( 13 === event.which ) { // Enter.
this.click();
}
event.preventDefault();
});

$( '.collapse-sidebar' ).on( 'click', function() {
api.state( 'paneVisible' ).set( ! api.state( 'paneVisible' ).get() );
});

api.state( 'paneVisible' ).bind( function( paneVisible ) {
overlay.toggleClass( 'preview-only', ! paneVisible );
overlay.toggleClass( 'expanded', paneVisible );
overlay.toggleClass( 'collapsed', ! paneVisible );

if ( ! paneVisible ) {
$( '.collapse-sidebar' ).attr({ 'aria-expanded': 'false', 'aria-label': api.l10n.expandSidebar });
} else {
$( '.collapse-sidebar' ).attr({ 'aria-expanded': 'true', 'aria-label': api.l10n.collapseSidebar });
}
});

// Keyboard shortcuts - esc to exit section/panel.
body.on( 'keydown', function( event ) {
var collapsedObject, expandedControls = [], expandedSections = [], expandedPanels = [];

if ( 27 !== event.which ) { // Esc.
return;
}

/*
* Abort if the event target is not the body (the default) and not inside of #customize-controls.
* This ensures that ESC meant to collapse a modal dialog or a TinyMCE toolbar won't collapse something else.
*/
if ( ! $( event.target ).is( 'body' ) && ! $.contains( $( '#customize-controls' )[0], event.target ) ) {
return;
}

// Abort if we're inside of a block editor instance.
if ( event.target.closest( '.block-editor-writing-flow' ) !== null ||
event.target.closest( '.block-editor-block-list__block-popover' ) !== null
) {
return;
}

// Check for expanded expandable controls (e.g. widgets and nav menus items), sections, and panels.
api.control.each( function( control ) {
if ( control.expanded && control.expanded() && _.isFunction( control.collapse ) ) {
expandedControls.push( control );
}
});
api.section.each( function( section ) {
if ( section.expanded() ) {
expandedSections.push( section );
}
});
api.panel.each( function( panel ) {
if ( panel.expanded() ) {
expandedPanels.push( panel );
}
});

// Skip collapsing expanded controls if there are no expanded sections.
if ( expandedControls.length > 0 && 0 === expandedSections.length ) {
expandedControls.length = 0;
}

// Collapse the most granular expanded object.
collapsedObject = expandedControls[0] || expandedSections[0] || expandedPanels[0];
if ( collapsedObject ) {
if ( 'themes' === collapsedObject.params.type ) {

// Themes panel or section.
if ( body.hasClass( 'modal-open' ) ) {
collapsedObject.closeDetails();
} else if ( api.panel.has( 'themes' ) ) {

// If we're collapsing a section, collapse the panel also.
api.panel( 'themes' ).collapse();
}
return;
}
collapsedObject.collapse();
event.preventDefault();
}
});

$( '.customize-controls-preview-toggle' ).on( 'click', function() {
api.state( 'paneVisible' ).set( ! api.state( 'paneVisible' ).get() );
});

/*
* Sticky header feature.
*/
(function initStickyHeaders() {
var parentContainer = $( '.wp-full-overlay-sidebar-content' ),
changeContainer, updateHeaderHeight, releaseStickyHeader, resetStickyHeader, positionStickyHeader,
activeHeader, lastScrollTop;

/**
* Determine which panel or section is currently expanded.
*
* @since 4.7.0
* @access private
*
* @param {wp.customize.Panel|wp.customize.Section} container Construct.
* @return {void}
*/
changeContainer = function( container ) {
var newInstance = container,
expandedSection = api.state( 'expandedSection' ).get(),
expandedPanel = api.state( 'expandedPanel' ).get(),
headerElement;

if ( activeHeader && activeHeader.element ) {
// Release previously active header element.
releaseStickyHeader( activeHeader.element );

// Remove event listener in the previous panel or section.
activeHeader.element.find( '.description' ).off( 'toggled', updateHeaderHeight );
}

if ( ! newInstance ) {
if ( ! expandedSection && expandedPanel && expandedPanel.contentContainer ) {
newInstance = expandedPanel;
} else if ( ! expandedPanel && expandedSection && expandedSection.contentContainer ) {
newInstance = expandedSection;
} else {
activeHeader = false;
return;
}
}

headerElement = newInstance.contentContainer.find( '.customize-section-title, .panel-meta' ).first();
if ( headerElement.length ) {
activeHeader = {
instance: newInstance,
element: headerElement,
parent: headerElement.closest( '.customize-pane-child' ),
height: headerElement.outerHeight()
};

// Update header height whenever help text is expanded or collapsed.
activeHeader.element.find( '.description' ).on( 'toggled', updateHeaderHeight );

if ( expandedSection ) {
resetStickyHeader( activeHeader.element, activeHeader.parent );
}
} else {
activeHeader = false;
}
};
api.state( 'expandedSection' ).bind( changeContainer );
api.state( 'expandedPanel' ).bind( changeContainer );

// Throttled scroll event handler.
parentContainer.on( 'scroll', _.throttle( function() {
if ( ! activeHeader ) {
return;
}

var scrollTop = parentContainer.scrollTop(),
scrollDirection;

if ( ! lastScrollTop ) {
scrollDirection = 1;
} else {
if ( scrollTop === lastScrollTop ) {
scrollDirection = 0;
} else if ( scrollTop > lastScrollTop ) {
scrollDirection = 1;
} else {
scrollDirection = -1;
}
}
lastScrollTop = scrollTop;
if ( 0 !== scrollDirection ) {
positionStickyHeader( activeHeader, scrollTop, scrollDirection );
}
}, 8 ) );

// Update header position on sidebar layout change.
api.notifications.bind( 'sidebarTopUpdated', function() {
if ( activeHeader && activeHeader.element.hasClass( 'is-sticky' ) ) {
activeHeader.element.css( 'top', parentContainer.css( 'top' ) );
}
});

// Release header element if it is sticky.
releaseStickyHeader = function( headerElement ) {
if ( ! headerElement.hasClass( 'is-sticky' ) ) {
return;
}
headerElement
.removeClass( 'is-sticky' )
.addClass( 'maybe-sticky is-in-view' )
.css( 'top', parentContainer.scrollTop() + 'px' );
};

// Reset position of the sticky header.
resetStickyHeader = function( headerElement, headerParent ) {
if ( headerElement.hasClass( 'is-in-view' ) ) {
headerElement
.removeClass( 'maybe-sticky is-in-view' )
.css( {
width: '',
top: ''
} );
headerParent.css( 'padding-top', '' );
}
};

/**
* Update active header height.
*
* @since 4.7.0
* @access private
*
* @return {void}
*/
updateHeaderHeight = function() {
activeHeader.height = activeHeader.element.outerHeight();
};

/**
* Reposition header on throttled `scroll` event.
*
* @since 4.7.0
* @access private
*
* @param {Object} header - Header.
* @param {number} scrollTop - Scroll top.
* @param {number} scrollDirection - Scroll direction, negative number being up and positive being down.
* @return {void}
*/
positionStickyHeader = function( header, scrollTop, scrollDirection ) {
var headerElement = header.element,
headerParent = header.parent,
headerHeight = header.height,
headerTop = parseInt( headerElement.css( 'top' ), 10 ),
maybeSticky = headerElement.hasClass( 'maybe-sticky' ),
isSticky = headerElement.hasClass( 'is-sticky' ),
isInView = headerElement.hasClass( 'is-in-view' ),
isScrollingUp = ( -1 === scrollDirection );

// When scrolling down, gradually hide sticky header.
if ( ! isScrollingUp ) {
if ( isSticky ) {
headerTop = scrollTop;
headerElement
.removeClass( 'is-sticky' )
.css( {
top: headerTop + 'px',
width: ''
} );
}
if ( isInView && scrollTop > headerTop + headerHeight ) {
headerElement.removeClass( 'is-in-view' );
headerParent.css( 'padding-top', '' );
}
return;
}

// Scrolling up.
if ( ! maybeSticky && scrollTop >= headerHeight ) {
maybeSticky = true;
headerElement.addClass( 'maybe-sticky' );
} else if ( 0 === scrollTop ) {
// Reset header in base position.
headerElement
.removeClass( 'maybe-sticky is-in-view is-sticky' )
.css( {
top: '',
width: ''
} );
headerParent.css( 'padding-top', '' );
return;
}

if ( isInView && ! isSticky ) {
// Header is in the view but is not yet sticky.
if ( headerTop >= scrollTop ) {
// Header is fully visible.
headerElement
.addClass( 'is-sticky' )
.css( {
top: parentContainer.css( 'top' ),
width: headerParent.outerWidth() + 'px'
} );
}
} else if ( maybeSticky && ! isInView ) {
// Header is out of the view.
headerElement
.addClass( 'is-in-view' )
.css( 'top', ( scrollTop - headerHeight ) + 'px' );
headerParent.css( 'padding-top', headerHeight + 'px' );
}
};
}());

// Previewed device bindings. (The api.previewedDevice property
// is how this Value was first introduced, but since it has moved to api.state.)
api.previewedDevice = api.state( 'previewedDevice' );

// Set the default device.
api.bind( 'ready', function() {
_.find( api.settings.previewableDevices, function( value, key ) {
if ( true === value['default'] ) {
api.previewedDevice.set( key );
return true;
}
} );
} );

// Set the toggled device.
footerActions.find( '.devices button' ).on( 'click', function( event ) {
api.previewedDevice.set( $( event.currentTarget ).data( 'device' ) );
});

// Bind device changes.
api.previewedDevice.bind( function( newDevice ) {
var overlay = $( '.wp-full-overlay' ),
devices = '';

footerActions.find( '.devices button' )
.removeClass( 'active' )
.attr( 'aria-pressed', false );

footerActions.find( '.devices .preview-' + newDevice )
.addClass( 'active' )
.attr( 'aria-pressed', true );

$.each( api.settings.previewableDevices, function( device ) {
devices += ' preview-' + device;
} );

overlay
.removeClass( devices )
.addClass( 'preview-' + newDevice );
} );

// Bind site title display to the corresponding field.
if ( title.length ) {
api( 'blogname', function( setting ) {
var updateTitle = function() {
var blogTitle = setting() || '';
title.text( blogTitle.toString().trim() || api.l10n.untitledBlogName );
};
setting.bind( updateTitle );
updateTitle();
} );
}

/*
* Create a postMessage connection with a parent frame,
* in case the Customizer frame was opened with the Customize loader.
*
* @see wp.customize.Loader
*/
parent = new api.Messenger({
url: api.settings.url.parent,
channel: 'loader'
});

// Handle exiting of Customizer.
(function() {
var isInsideIframe = false;

function isCleanState() {
var defaultChangesetStatus;

/*
* Handle special case of previewing theme switch since some settings (for nav menus and widgets)
* are pre-dirty and non-active themes can only ever be auto-drafts.
*/
if ( ! api.state( 'activated' ).get() ) {
return 0 === api._latestRevision;
}

// Dirty if the changeset status has been changed but not saved yet.
defaultChangesetStatus = api.state( 'changesetStatus' ).get();
if ( '' === defaultChangesetStatus || 'auto-draft' === defaultChangesetStatus ) {
defaultChangesetStatus = 'publish';
}
if ( api.state( 'selectedChangesetStatus' ).get() !== defaultChangesetStatus ) {
return false;
}

// Dirty if scheduled but the changeset date hasn't been saved yet.
if ( 'future' === api.state( 'selectedChangesetStatus' ).get() && api.state( 'selectedChangesetDate' ).get() !== api.state( 'changesetDate' ).get() ) {
return false;
}

return api.state( 'saved' ).get() && 'auto-draft' !== api.state( 'changesetStatus' ).get();
}

/*
* If we receive a 'back' event, we're inside an iframe.
* Send any clicks to the 'Return' link to the parent page.
*/
parent.bind( 'back', function() {
isInsideIframe = true;
});

function startPromptingBeforeUnload() {
api.unbind( 'change', startPromptingBeforeUnload );
api.state( 'selectedChangesetStatus' ).unbind( startPromptingBeforeUnload );
api.state( 'selectedChangesetDate' ).unbind( startPromptingBeforeUnload );

// Prompt user with AYS dialog if leaving the Customizer with unsaved changes.
$( window ).on( 'beforeunload.customize-confirm', function() {
if ( ! isCleanState() && ! api.state( 'changesetLocked' ).get() ) {
setTimeout( function() {
overlay.removeClass( 'customize-loading' );
}, 1 );
return api.l10n.saveAlert;
}
});
}
api.bind( 'change', startPromptingBeforeUnload );
api.state( 'selectedChangesetStatus' ).bind( startPromptingBeforeUnload );
api.state( 'selectedChangesetDate' ).bind( startPromptingBeforeUnload );

function requestClose() {
var clearedToClose = $.Deferred(), dismissAutoSave = false, dismissLock = false;

if ( isCleanState() ) {
dismissLock = true;
} else if ( confirm( api.l10n.saveAlert ) ) {

dismissLock = true;

// Mark all settings as clean to prevent another call to requestChangesetUpdate.
api.each( function( setting ) {
setting._dirty = false;
});
$( document ).off( 'visibilitychange.wp-customize-changeset-update' );
$( window ).off( 'beforeunload.wp-customize-changeset-update' );

closeBtn.css( 'cursor', 'progress' );
if ( '' !== api.state( 'changesetStatus' ).get() ) {
dismissAutoSave = true;
}
} else {
clearedToClose.reject();
}

if ( dismissLock || dismissAutoSave ) {
wp.ajax.send( 'customize_dismiss_autosave_or_lock', {
timeout: 500, // Don't wait too long.
data: {
wp_customize: 'on',
customize_theme: api.settings.theme.stylesheet,
customize_changeset_uuid: api.settings.changeset.uuid,
nonce: api.settings.nonce.dismiss_autosave_or_lock,
dismiss_autosave: dismissAutoSave,
dismiss_lock: dismissLock
}
} ).always( function() {
clearedToClose.resolve();
} );
}

return clearedToClose.promise();
}

parent.bind( 'confirm-close', function() {
requestClose().done( function() {
parent.send( 'confirmed-close', true );
} ).fail( function() {
parent.send( 'confirmed-close', false );
} );
} );

closeBtn.on( 'click.customize-controls-close', function( event ) {
event.preventDefault();
if ( isInsideIframe ) {
parent.send( 'close' ); // See confirm-close logic above.
} else {
requestClose().done( function() {
$( window ).off( 'beforeunload.customize-confirm' );
window.location.href = closeBtn.prop( 'href' );
} );
}
});
})();

// Pass events through to the parent.
$.each( [ 'saved', 'change' ], function ( i, event ) {
api.bind( event, function() {
parent.send( event );
});
} );

// Pass titles to the parent.
api.bind( 'title', function( newTitle ) {
parent.send( 'title', newTitle );
});

if ( api.settings.changeset.branching ) {
parent.send( 'changeset-uuid', api.settings.changeset.uuid );
}

// Initialize the connection with the parent frame.
parent.send( 'ready' );

// Control visibility for default controls.
$.each({
'background_image': {
controls: [ 'background_preset', 'background_position', 'background_size', 'background_repeat', 'background_attachment' ],
callback: function( to ) { return !! to; }
},
'show_on_front': {
controls: [ 'page_on_front', 'page_for_posts' ],
callback: function( to ) { return 'page' === to; }
},
'header_textcolor': {
controls: [ 'header_textcolor' ],
callback: function( to ) { return 'blank' !== to; }
}
}, function( settingId, o ) {
api( settingId, function( setting ) {
$.each( o.controls, function( i, controlId ) {
api.control( controlId, function( control ) {
var visibility = function( to ) {
control.container.toggle( o.callback( to ) );
};

visibility( setting.get() );
setting.bind( visibility );
});
});
});
});

api.control( 'background_preset', function( control ) {
var visibility, defaultValues, values, toggleVisibility, updateSettings, preset;

visibility = { // position, size, repeat, attachment.
'default': [ false, false, false, false ],
'fill': [ true, false, false, false ],
'fit': [ true, false, true, false ],
'repeat': [ true, false, false, true ],
'custom': [ true, true, true, true ]
};

defaultValues = [
_wpCustomizeBackground.defaults['default-position-x'],
_wpCustomizeBackground.defaults['default-position-y'],
_wpCustomizeBackground.defaults['default-size'],
_wpCustomizeBackground.defaults['default-repeat'],
_wpCustomizeBackground.defaults['default-attachment']
];

values = { // position_x, position_y, size, repeat, attachment.
'default': defaultValues,
'fill': [ 'left', 'top', 'cover', 'no-repeat', 'fixed' ],
'fit': [ 'left', 'top', 'contain', 'no-repeat', 'fixed' ],
'repeat': [ 'left', 'top', 'auto', 'repeat', 'scroll' ]
};

// @todo These should actually toggle the active state,
// but without the preview overriding the state in data.activeControls.
toggleVisibility = function( preset ) {
_.each( [ 'background_position', 'background_size', 'background_repeat', 'background_attachment' ], function( controlId, i ) {
var control = api.control( controlId );
if ( control ) {
control.container.toggle( visibility[ preset ][ i ] );
}
} );
};

updateSettings = function( preset ) {
_.each( [ 'background_position_x', 'background_position_y', 'background_size', 'background_repeat', 'background_attachment' ], function( settingId, i ) {
var setting = api( settingId );
if ( setting ) {
setting.set( values[ preset ][ i ] );
}
} );
};

preset = control.setting.get();
toggleVisibility( preset );

control.setting.bind( 'change', function( preset ) {
toggleVisibility( preset );
if ( 'custom' !== preset ) {
updateSettings( preset );
}
} );
} );

api.control( 'background_repeat', function( control ) {
control.elements[0].unsync( api( 'background_repeat' ) );

control.element = new api.Element( control.container.find( 'input' ) );
control.element.set( 'no-repeat' !== control.setting() );

control.element.bind( function( to ) {
control.setting.set( to ? 'repeat' : 'no-repeat' );
} );

control.setting.bind( function( to ) {
control.element.set( 'no-repeat' !== to );
} );
} );

api.control( 'background_attachment', function( control ) {
control.elements[0].unsync( api( 'background_attachment' ) );

control.element = new api.Element( control.container.find( 'input' ) );
control.element.set( 'fixed' !== control.setting() );

control.element.bind( function( to ) {
control.setting.set( to ? 'scroll' : 'fixed' );
} );

control.setting.bind( function( to ) {
control.element.set( 'fixed' !== to );
} );
} );

// Juggle the two controls that use header_textcolor.
api.control( 'display_header_text', function( control ) {
var last = '';

control.elements[0].unsync( api( 'header_textcolor' ) );

control.element = new api.Element( control.container.find('input') );
control.element.set( 'blank' !== control.setting() );

control.element.bind( function( to ) {
if ( ! to ) {
last = api( 'header_textcolor' ).get();
}

control.setting.set( to ? last : 'blank' );
});

control.setting.bind( function( to ) {
control.element.set( 'blank' !== to );
});
});

// Add behaviors to the static front page controls.
api( 'show_on_front', 'page_on_front', 'page_for_posts', function( showOnFront, pageOnFront, pageForPosts ) {
var handleChange = function() {
var setting = this, pageOnFrontId, pageForPostsId, errorCode = 'show_on_front_page_collision';
pageOnFrontId = parseInt( pageOnFront(), 10 );
pageForPostsId = parseInt( pageForPosts(), 10 );

if ( 'page' === showOnFront() ) {

// Change previewed URL to the homepage when changing the page_on_front.
if ( setting === pageOnFront && pageOnFrontId > 0 ) {
api.previewer.previewUrl.set( api.settings.url.home );
}

// Change the previewed URL to the selected page when changing the page_for_posts.
if ( setting === pageForPosts && pageForPostsId > 0 ) {
api.previewer.previewUrl.set( api.settings.url.home + '?page_id=' + pageForPostsId );
}
}

// Toggle notification when the homepage and posts page are both set and the same.
if ( 'page' === showOnFront() && pageOnFrontId && pageForPostsId && pageOnFrontId === pageForPostsId ) {
showOnFront.notifications.add( new api.Notification( errorCode, {
type: 'error',
message: api.l10n.pageOnFrontError
} ) );
} else {
showOnFront.notifications.remove( errorCode );
}
};
showOnFront.bind( handleChange );
pageOnFront.bind( handleChange );
pageForPosts.bind( handleChange );
handleChange.call( showOnFront, showOnFront() ); // Make sure initial notification is added after loading existing changeset.

// Move notifications container to the bottom.
api.control( 'show_on_front', function( showOnFrontControl ) {
showOnFrontControl.deferred.embedded.done( function() {
showOnFrontControl.container.append( showOnFrontControl.getNotificationsContainerElement() );
});
});
});

// Add code editor for Custom CSS.
(function() {
var sectionReady = $.Deferred();

api.section( 'custom_css', function( section ) {
section.deferred.embedded.done( function() {
if ( section.expanded() ) {
sectionReady.resolve( section );
} else {
section.expanded.bind( function( isExpanded ) {
if ( isExpanded ) {
sectionReady.resolve( section );
}
} );
}
});
});

// Set up the section description behaviors.
sectionReady.done( function setupSectionDescription( section ) {
var control = api.control( 'custom_css' );

// Hide redundant label for visual users.
control.container.find( '.customize-control-title:first' ).addClass( 'screen-reader-text' );

// Close the section description when clicking the close button.
section.container.find( '.section-description-buttons .section-description-close' ).on( 'click', function() {
section.container.find( '.section-meta .customize-section-description:first' )
.removeClass( 'open' )
.slideUp();

section.container.find( '.customize-help-toggle' )
.attr( 'aria-expanded', 'false' )
.focus(); // Avoid focus loss.
});

// Reveal help text if setting is empty.
if ( control && ! control.setting.get() ) {
section.container.find( '.section-meta .customize-section-description:first' )
.addClass( 'open' )
.show()
.trigger( 'toggled' );

section.container.find( '.customize-help-toggle' ).attr( 'aria-expanded', 'true' );
}
});
})();

// Toggle visibility of Header Video notice when active state change.
api.control( 'header_video', function( headerVideoControl ) {
headerVideoControl.deferred.embedded.done( function() {
var toggleNotice = function() {
var section = api.section( headerVideoControl.section() ), noticeCode = 'video_header_not_available';
if ( ! section ) {
return;
}
if ( headerVideoControl.active.get() ) {
section.notifications.remove( noticeCode );
} else {
section.notifications.add( new api.Notification( noticeCode, {
type: 'info',
message: api.l10n.videoHeaderNotice
} ) );
}
};
toggleNotice();
headerVideoControl.active.bind( toggleNotice );
} );
} );

// Update the setting validities.
api.previewer.bind( 'selective-refresh-setting-validities', function handleSelectiveRefreshedSettingValidities( settingValidities ) {
api._handleSettingValidities( {
settingValidities: settingValidities,
focusInvalidControl: false
} );
} );

// Focus on the control that is associated with the given setting.
api.previewer.bind( 'focus-control-for-setting', function( settingId ) {
var matchedControls = [];
api.control.each( function( control ) {
var settingIds = _.pluck( control.settings, 'id' );
if ( -1 !== _.indexOf( settingIds, settingId ) ) {
matchedControls.push( control );
}
} );

// Focus on the matched control with the lowest priority (appearing higher).
if ( matchedControls.length ) {
matchedControls.sort( function( a, b ) {
return a.priority() - b.priority();
} );
matchedControls[0].focus();
}
} );

// Refresh the preview when it requests.
api.previewer.bind( 'refresh', function() {
api.previewer.refresh();
});

// Update the edit shortcut visibility state.
api.state( 'paneVisible' ).bind( function( isPaneVisible ) {
var isMobileScreen;
if ( window.matchMedia ) {
isMobileScreen = window.matchMedia( 'screen and ( max-width: 640px )' ).matches;
} else {
isMobileScreen = $( window ).width() <= 640;
}
api.state( 'editShortcutVisibility' ).set( isPaneVisible || isMobileScreen ? 'visible' : 'hidden' );
} );
if ( window.matchMedia ) {
window.matchMedia( 'screen and ( max-width: 640px )' ).addListener( function() {
var state = api.state( 'paneVisible' );
state.callbacks.fireWith( state, [ state.get(), state.get() ] );
} );
}
api.previewer.bind( 'edit-shortcut-visibility', function( visibility ) {
api.state( 'editShortcutVisibility' ).set( visibility );
} );
api.state( 'editShortcutVisibility' ).bind( function( visibility ) {
api.previewer.send( 'edit-shortcut-visibility', visibility );
} );

// Autosave changeset.
function startAutosaving() {
var timeoutId, updateChangesetWithReschedule, scheduleChangesetUpdate, updatePending = false;

api.unbind( 'change', startAutosaving ); // Ensure startAutosaving only fires once.

function onChangeSaved( isSaved ) {
if ( ! isSaved && ! api.settings.changeset.autosaved ) {
api.settings.changeset.autosaved = true; // Once a change is made then autosaving kicks in.
api.previewer.send( 'autosaving' );
}
}
api.state( 'saved' ).bind( onChangeSaved );
onChangeSaved( api.state( 'saved' ).get() );

/**
* Request changeset update and then re-schedule the next changeset update time.
*
* @since 4.7.0
* @private
*/
updateChangesetWithReschedule = function() {
if ( ! updatePending ) {
updatePending = true;
api.requestChangesetUpdate( {}, { autosave: true } ).always( function() {
updatePending = false;
} );
}
scheduleChangesetUpdate();
};

/**
* Schedule changeset update.
*
* @since 4.7.0
* @private
*/
scheduleChangesetUpdate = function() {
clearTimeout( timeoutId );
timeoutId = setTimeout( function() {
updateChangesetWithReschedule();
}, api.settings.timeouts.changesetAutoSave );
};

// Start auto-save interval for updating changeset.
scheduleChangesetUpdate();

// Save changeset when focus removed from window.
$( document ).on( 'visibilitychange.wp-customize-changeset-update', function() {
if ( document.hidden ) {
updateChangesetWithReschedule();
}
} );

// Save changeset before unloading window.
$( window ).on( 'beforeunload.wp-customize-changeset-update', function() {
updateChangesetWithReschedule();
} );
}
api.bind( 'change', startAutosaving );

// Make sure TinyMCE dialogs appear above Customizer UI.
$( document ).one( 'tinymce-editor-setup', function() {
if ( window.tinymce.ui.FloatPanel && ( ! window.tinymce.ui.FloatPanel.zIndex || window.tinymce.ui.FloatPanel.zIndex < 500001 ) ) {
window.tinymce.ui.FloatPanel.zIndex = 500001;
}
} );

body.addClass( 'ready' );
api.trigger( 'ready' );
});

})( wp, jQuery );