/**

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* Contains the postboxes logic, opening and closing postboxes, reordering and saving

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* the state and ordering to the database.

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*

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* @since 2.5.0

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* @requires jQuery

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* @output wp-admin/js/postbox.js

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*/

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/* global ajaxurl, postboxes */

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(function($) {

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var $document = $( document ),

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__ = wp.i18n.__;

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/**

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* This object contains all function to handle the behaviour of the post boxes. The post boxes are the boxes you see

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* around the content on the edit page.

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*

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* @since 2.7.0

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*

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* @namespace postboxes

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*

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* @type {Object}

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*/

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window.postboxes = {

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/**

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* Handles a click on either the postbox heading or the postbox open/close icon.

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*

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* Opens or closes the postbox. Expects `this` to equal the clicked element.

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* Calls postboxes.pbshow if the postbox has been opened, calls postboxes.pbhide

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* if the postbox has been closed.

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*

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* @since 4.4.0

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*

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* @memberof postboxes

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*

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* @fires postboxes#postbox-toggled

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*

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* @return {void}

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*/

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handle_click : function () {

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var $el = $( this ),

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p = $el.closest( '.postbox' ),

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id = p.attr( 'id' ),

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ariaExpandedValue;

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if ( 'dashboard_browser_nag' === id ) {

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return;

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}

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p.toggleClass( 'closed' );

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ariaExpandedValue = ! p.hasClass( 'closed' );

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if ( $el.hasClass( 'handlediv' ) ) {

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// The handle button was clicked.

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$el.attr( 'aria-expanded', ariaExpandedValue );

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} else {

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// The handle heading was clicked.

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$el.closest( '.postbox' ).find( 'button.handlediv' )

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.attr( 'aria-expanded', ariaExpandedValue );

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}

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if ( postboxes.page !== 'press-this' ) {

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postboxes.save_state( postboxes.page );

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}

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if ( id ) {

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if ( !p.hasClass('closed') && typeof postboxes.pbshow === 'function' ) {

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postboxes.pbshow( id );

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} else if ( p.hasClass('closed') && typeof postboxes.pbhide === 'function' ) {

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postboxes.pbhide( id );

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}

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}

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/**

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* Fires when a postbox has been opened or closed.

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*

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* Contains a jQuery object with the relevant postbox element.

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*

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* @since 4.0.0

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* @ignore

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*

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* @event postboxes#postbox-toggled

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* @type {Object}

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*/

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$document.trigger( 'postbox-toggled', p );

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},

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/**

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* Handles clicks on the move up/down buttons.

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*

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* @since 5.5.0

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*

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* @return {void}

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*/

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handleOrder: function() {

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var button = $( this ),

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postbox = button.closest( '.postbox' ),

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postboxId = postbox.attr( 'id' ),

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postboxesWithinSortables = postbox.closest( '.meta-box-sortables' ).find( '.postbox:visible' ),

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postboxesWithinSortablesCount = postboxesWithinSortables.length,

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postboxWithinSortablesIndex = postboxesWithinSortables.index( postbox ),

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firstOrLastPositionMessage;

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if ( 'dashboard_browser_nag' === postboxId ) {

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return;

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}

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// If on the first or last position, do nothing and send an audible message to screen reader users.

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if ( 'true' === button.attr( 'aria-disabled' ) ) {

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firstOrLastPositionMessage = button.hasClass( 'handle-order-higher' ) ?

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__( 'The box is on the first position' ) :

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__( 'The box is on the last position' );

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wp.a11y.speak( firstOrLastPositionMessage );

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return;

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}

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// Move a postbox up.

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if ( button.hasClass( 'handle-order-higher' ) ) {

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// If the box is first within a sortable area, move it to the previous sortable area.

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if ( 0 === postboxWithinSortablesIndex ) {

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postboxes.handleOrderBetweenSortables( 'previous', button, postbox );

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return;

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}

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postbox.prevAll( '.postbox:visible' ).eq( 0 ).before( postbox );

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button.trigger( 'focus' );

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postboxes.updateOrderButtonsProperties();

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postboxes.save_order( postboxes.page );

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}

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// Move a postbox down.

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if ( button.hasClass( 'handle-order-lower' ) ) {

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// If the box is last within a sortable area, move it to the next sortable area.

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if ( postboxWithinSortablesIndex + 1 === postboxesWithinSortablesCount ) {

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postboxes.handleOrderBetweenSortables( 'next', button, postbox );

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return;

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}

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postbox.nextAll( '.postbox:visible' ).eq( 0 ).after( postbox );

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button.trigger( 'focus' );

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postboxes.updateOrderButtonsProperties();

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postboxes.save_order( postboxes.page );

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}

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},

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/**

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* Moves postboxes between the sortables areas.

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*

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* @since 5.5.0

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*

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* @param {string} position The "previous" or "next" sortables area.

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* @param {Object} button The jQuery object representing the button that was clicked.

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* @param {Object} postbox The jQuery object representing the postbox to be moved.

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*

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* @return {void}

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*/

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handleOrderBetweenSortables: function( position, button, postbox ) {

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var closestSortablesId = button.closest( '.meta-box-sortables' ).attr( 'id' ),

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sortablesIds = [],

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sortablesIndex,

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detachedPostbox;

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// Get the list of sortables within the page.

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$( '.meta-box-sortables:visible' ).each( function() {

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sortablesIds.push( $( this ).attr( 'id' ) );

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});

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// Return if there's only one visible sortables area, e.g. in the block editor page.

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if ( 1 === sortablesIds.length ) {

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return;

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}

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// Find the index of the current sortables area within all the sortable areas.

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sortablesIndex = $.inArray( closestSortablesId, sortablesIds );

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// Detach the postbox to be moved.

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detachedPostbox = postbox.detach();

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// Move the detached postbox to its new position.

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if ( 'previous' === position ) {

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$( detachedPostbox ).appendTo( '#' + sortablesIds[ sortablesIndex - 1 ] );

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}

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if ( 'next' === position ) {

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$( detachedPostbox ).prependTo( '#' + sortablesIds[ sortablesIndex + 1 ] );

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}

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postboxes._mark_area();

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button.focus();

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postboxes.updateOrderButtonsProperties();

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postboxes.save_order( postboxes.page );

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},

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/**

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* Update the move buttons properties depending on the postbox position.

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*

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* @since 5.5.0

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*

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* @return {void}

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*/

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updateOrderButtonsProperties: function() {

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var firstSortablesId = $( '.meta-box-sortables:visible:first' ).attr( 'id' ),

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lastSortablesId = $( '.meta-box-sortables:visible:last' ).attr( 'id' ),

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firstPostbox = $( '.postbox:visible:first' ),

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lastPostbox = $( '.postbox:visible:last' ),

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firstPostboxId = firstPostbox.attr( 'id' ),

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lastPostboxId = lastPostbox.attr( 'id' ),

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firstPostboxSortablesId = firstPostbox.closest( '.meta-box-sortables' ).attr( 'id' ),

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lastPostboxSortablesId = lastPostbox.closest( '.meta-box-sortables' ).attr( 'id' ),

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moveUpButtons = $( '.handle-order-higher' ),

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moveDownButtons = $( '.handle-order-lower' );

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// Enable all buttons as a reset first.

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moveUpButtons

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.attr( 'aria-disabled', 'false' )

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.removeClass( 'hidden' );

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moveDownButtons

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.attr( 'aria-disabled', 'false' )

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.removeClass( 'hidden' );

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// When there's only one "sortables" area (e.g. in the block editor) and only one visible postbox, hide the buttons.

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if ( firstSortablesId === lastSortablesId && firstPostboxId === lastPostboxId ) {

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moveUpButtons.addClass( 'hidden' );

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moveDownButtons.addClass( 'hidden' );

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}

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// Set an aria-disabled=true attribute on the first visible "move" buttons.

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if ( firstSortablesId === firstPostboxSortablesId ) {

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$( firstPostbox ).find( '.handle-order-higher' ).attr( 'aria-disabled', 'true' );

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}

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// Set an aria-disabled=true attribute on the last visible "move" buttons.

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if ( lastSortablesId === lastPostboxSortablesId ) {

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$( '.postbox:visible .handle-order-lower' ).last().attr( 'aria-disabled', 'true' );

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}

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},

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/**

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* Adds event handlers to all postboxes and screen option on the current page.

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*

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* @since 2.7.0

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*

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* @memberof postboxes

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*

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* @param {string} page The page we are currently on.

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* @param {Object} [args]

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* @param {Function} args.pbshow A callback that is called when a postbox opens.

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* @param {Function} args.pbhide A callback that is called when a postbox closes.

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* @return {void}

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*/

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add_postbox_toggles : function (page, args) {

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var $handles = $( '.postbox .hndle, .postbox .handlediv' ),

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$orderButtons = $( '.postbox .handle-order-higher, .postbox .handle-order-lower' );

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this.page = page;

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this.init( page, args );

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$handles.on( 'click.postboxes', this.handle_click );

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// Handle the order of the postboxes.

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$orderButtons.on( 'click.postboxes', this.handleOrder );

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/**

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* @since 2.7.0

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*/

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$('.postbox .hndle a').on( 'click', function(e) {

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e.stopPropagation();

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});

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/**

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* Hides a postbox.

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*

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* Event handler for the postbox dismiss button. After clicking the button

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* the postbox will be hidden.

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*

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* As of WordPress 5.5, this is only used for the browser update nag.

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*

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* @since 3.2.0

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*

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* @return {void}

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*/

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$( '.postbox a.dismiss' ).on( 'click.postboxes', function( e ) {

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var hide_id = $(this).parents('.postbox').attr('id') + '-hide';

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e.preventDefault();

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$( '#' + hide_id ).prop('checked', false).triggerHandler('click');

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});

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/**

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* Hides the postbox element

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*

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* Event handler for the screen options checkboxes. When a checkbox is

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* clicked this function will hide or show the relevant postboxes.

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*

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* @since 2.7.0

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* @ignore

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*

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* @fires postboxes#postbox-toggled

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*

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* @return {void}

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*/

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$('.hide-postbox-tog').on('click.postboxes', function() {

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var $el = $(this),

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boxId = $el.val(),

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$postbox = $( '#' + boxId );

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if ( $el.prop( 'checked' ) ) {

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$postbox.show();

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if ( typeof postboxes.pbshow === 'function' ) {

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postboxes.pbshow( boxId );

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}

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} else {

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$postbox.hide();

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if ( typeof postboxes.pbhide === 'function' ) {

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postboxes.pbhide( boxId );

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}

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}

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postboxes.save_state( page );

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postboxes._mark_area();

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/**

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* @since 4.0.0

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* @see postboxes.handle_click

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*/

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$document.trigger( 'postbox-toggled', $postbox );

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});

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/**

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* Changes the amount of columns based on the layout preferences.

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*

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* @since 2.8.0

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*

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* @return {void}

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*/

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$('.columns-prefs input[type="radio"]').on('click.postboxes', function(){

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var n = parseInt($(this).val(), 10);

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if ( n ) {

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postboxes._pb_edit(n);

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postboxes.save_order( page );

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}

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});

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},

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/**

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* Initializes all the postboxes, mainly their sortable behaviour.

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*

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* @since 2.7.0

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*

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* @memberof postboxes

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*

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* @param {string} page The page we are currently on.

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* @param {Object} [args={}] The arguments for the postbox initializer.

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* @param {Function} args.pbshow A callback that is called when a postbox opens.

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* @param {Function} args.pbhide A callback that is called when a postbox

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* closes.

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*

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* @return {void}

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*/

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init : function(page, args) {

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var isMobile = $( document.body ).hasClass( 'mobile' ),

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$handleButtons = $( '.postbox .handlediv' );

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$.extend( this, args || {} );

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$('.meta-box-sortables').sortable({

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placeholder: 'sortable-placeholder',

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connectWith: '.meta-box-sortables',

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items: '.postbox',

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handle: '.hndle',

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cursor: 'move',

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delay: ( isMobile ? 200 : 0 ),

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distance: 2,

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tolerance: 'pointer',

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forcePlaceholderSize: true,

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helper: function( event, element ) {

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/* `helper: 'clone'` is equivalent to `return element.clone();`

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* Cloning a checked radio and then inserting that clone next to the original

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* radio unchecks the original radio (since only one of the two can be checked).

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* We get around this by renaming the helper's inputs' name attributes so that,

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* when the helper is inserted into the DOM for the sortable, no radios are

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* duplicated, and no original radio gets unchecked.

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*/

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return element.clone()

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.find( ':input' )

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.attr( 'name', function( i, currentName ) {

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return 'sort_' + parseInt( Math.random() * 100000, 10 ).toString() + '_' + currentName;

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} )

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.end();

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},

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opacity: 0.65,

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start: function() {

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$( 'body' ).addClass( 'is-dragging-metaboxes' );

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// Refresh the cached positions of all the sortable items so that the min-height set while dragging works.

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$( '.meta-box-sortables' ).sortable( 'refreshPositions' );

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},

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stop: function() {

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var $el = $( this );

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$( 'body' ).removeClass( 'is-dragging-metaboxes' );

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if ( $el.find( '#dashboard_browser_nag' ).is( ':visible' ) && 'dashboard_browser_nag' != this.firstChild.id ) {

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$el.sortable('cancel');

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return;

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}

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postboxes.updateOrderButtonsProperties();

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postboxes.save_order(page);

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},

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receive: function(e,ui) {

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if ( 'dashboard_browser_nag' == ui.item[0].id )

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$(ui.sender).sortable('cancel');

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postboxes._mark_area();

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$document.trigger( 'postbox-moved', ui.item );

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}

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});

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if ( isMobile ) {

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$(document.body).on('orientationchange.postboxes', function(){ postboxes._pb_change(); });

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this._pb_change();

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}

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this._mark_area();

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// Update the "move" buttons properties.

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this.updateOrderButtonsProperties();

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$document.on( 'postbox-toggled', this.updateOrderButtonsProperties );

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// Set the handle buttons `aria-expanded` attribute initial value on page load.

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$handleButtons.each( function () {

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var $el = $( this );

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$el.attr( 'aria-expanded', ! $el.closest( '.postbox' ).hasClass( 'closed' ) );

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});

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},

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/**

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* Saves the state of the postboxes to the server.

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*

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* It sends two lists, one with all the closed postboxes, one with all the

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* hidden postboxes.

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*

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* @since 2.7.0

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*

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* @memberof postboxes

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*

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* @param {string} page The page we are currently on.

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* @return {void}

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*/

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save_state : function(page) {

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var closed, hidden;

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// Return on the nav-menus.php screen, see #35112.

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if ( 'nav-menus' === page ) {

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return;

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}

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closed = $( '.postbox' ).filter( '.closed' ).map( function() { return this.id; } ).get().join( ',' );

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hidden = $( '.postbox' ).filter( ':hidden' ).map( function() { return this.id; } ).get().join( ',' );

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$.post(ajaxurl, {

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action: 'closed-postboxes',

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closed: closed,

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hidden: hidden,

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closedpostboxesnonce: jQuery('#closedpostboxesnonce').val(),

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page: page

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});

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},

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/**

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* Saves the order of the postboxes to the server.

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*

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* Sends a list of all postboxes inside a sortable area to the server.

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*

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* @since 2.8.0

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*

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* @memberof postboxes

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*

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* @param {string} page The page we are currently on.

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* @return {void}

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*/

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save_order : function(page) {

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var postVars, page_columns = $('.columns-prefs input:checked').val() || 0;

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postVars = {

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action: 'meta-box-order',

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_ajax_nonce: $('#meta-box-order-nonce').val(),

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page_columns: page_columns,

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page: page

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};

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$('.meta-box-sortables').each( function() {

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postVars[ 'order[' + this.id.split( '-' )[0] + ']' ] = $( this ).sortable( 'toArray' ).join( ',' );

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} );

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$.post(

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ajaxurl,

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