1/**
  2 * @output wp-admin/js/common.js
  3 */
  4
  5/* global setUserSetting, ajaxurl, alert, confirm, pagenow */
  6/* global columns, screenMeta */
  7
  8/**
  9 *  Adds common WordPress functionality to the window.
 10 *
 11 *  @param {jQuery} $        jQuery object.
 12 *  @param {Object} window   The window object.
 13 *  @param {mixed} undefined Unused.
 14 */
 15( function( $, window, undefined ) {
 16	var $document = $( document ),
 17		$window = $( window ),
 18		$body = $( document.body ),
 19		__ = wp.i18n.__,
 20		sprintf = wp.i18n.sprintf;
 21
 22/**
 23 * Throws an error for a deprecated property.
 24 *
 25 * @since 5.5.1
 26 *
 27 * @param {string} propName    The property that was used.
 28 * @param {string} version     The version of WordPress that deprecated the property.
 29 * @param {string} replacement The property that should have been used.
 30 */
 31function deprecatedProperty( propName, version, replacement ) {
 32	var message;
 33
 34	if ( 'undefined' !== typeof replacement ) {
 35		message = sprintf(
 36			/* translators: 1: Deprecated property name, 2: Version number, 3: Alternative property name. */
 37			__( '%1$s is deprecated since version %2$s! Use %3$s instead.' ),
 38			propName,
 39			version,
 40			replacement
 41		);
 42	} else {
 43		message = sprintf(
 44			/* translators: 1: Deprecated property name, 2: Version number. */
 45			__( '%1$s is deprecated since version %2$s with no alternative available.' ),
 46			propName,
 47			version
 48		);
 49	}
 50
 51	window.console.warn( message );
 52}
 53
 54/**
 55 * Deprecate all properties on an object.
 56 *
 57 * @since 5.5.1
 58 * @since 5.6.0 Added the `version` parameter.
 59 *
 60 * @param {string} name       The name of the object, i.e. commonL10n.
 61 * @param {object} l10nObject The object to deprecate the properties on.
 62 * @param {string} version    The version of WordPress that deprecated the property.
 63 *
 64 * @return {object} The object with all its properties deprecated.
 65 */
 66function deprecateL10nObject( name, l10nObject, version ) {
 67	var deprecatedObject = {};
 68
 69	Object.keys( l10nObject ).forEach( function( key ) {
 70		var prop = l10nObject[ key ];
 71		var propName = name + '.' + key;
 72
 73		if ( 'object' === typeof prop ) {
 74			Object.defineProperty( deprecatedObject, key, { get: function() {
 75				deprecatedProperty( propName, version, prop.alternative );
 76				return prop.func();
 77			} } );
 78		} else {
 79			Object.defineProperty( deprecatedObject, key, { get: function() {
 80				deprecatedProperty( propName, version, 'wp.i18n' );
 81				return prop;
 82			} } );
 83		}
 84	} );
 85
 86	return deprecatedObject;
 87}
 88
 89window.wp.deprecateL10nObject = deprecateL10nObject;
 90
 91/**
 92 * Removed in 5.5.0, needed for back-compatibility.
 93 *
 94 * @since 2.6.0
 95 * @deprecated 5.5.0
 96 */
 97window.commonL10n = window.commonL10n || {
 98	warnDelete: '',
 99	dismiss: '',
100	collapseMenu: '',
101	expandMenu: ''
102};
103
104window.commonL10n = deprecateL10nObject( 'commonL10n', window.commonL10n, '5.5.0' );
105
106/**
107 * Removed in 5.5.0, needed for back-compatibility.
108 *
109 * @since 3.3.0
110 * @deprecated 5.5.0
111 */
112window.wpPointerL10n = window.wpPointerL10n || {
113	dismiss: ''
114};
115
116window.wpPointerL10n = deprecateL10nObject( 'wpPointerL10n', window.wpPointerL10n, '5.5.0' );
117
118/**
119 * Removed in 5.5.0, needed for back-compatibility.
120 *
121 * @since 4.3.0
122 * @deprecated 5.5.0
123 */
124window.userProfileL10n = window.userProfileL10n || {
125	warn: '',
126	warnWeak: '',
127	show: '',
128	hide: '',
129	cancel: '',
130	ariaShow: '',
131	ariaHide: ''
132};
133
134window.userProfileL10n = deprecateL10nObject( 'userProfileL10n', window.userProfileL10n, '5.5.0' );
135
136/**
137 * Removed in 5.5.0, needed for back-compatibility.
138 *
139 * @since 4.9.6
140 * @deprecated 5.5.0
141 */
142window.privacyToolsL10n = window.privacyToolsL10n || {
143	noDataFound: '',
144	foundAndRemoved: '',
145	noneRemoved: '',
146	someNotRemoved: '',
147	removalError: '',
148	emailSent: '',
149	noExportFile: '',
150	exportError: ''
151};
152
153window.privacyToolsL10n = deprecateL10nObject( 'privacyToolsL10n', window.privacyToolsL10n, '5.5.0' );
154
155/**
156 * Removed in 5.5.0, needed for back-compatibility.
157 *
158 * @since 3.6.0
159 * @deprecated 5.5.0
160 */
161window.authcheckL10n = {
162	beforeunload: ''
163};
164
165window.authcheckL10n = window.authcheckL10n || deprecateL10nObject( 'authcheckL10n', window.authcheckL10n, '5.5.0' );
166
167/**
168 * Removed in 5.5.0, needed for back-compatibility.
169 *
170 * @since 2.8.0
171 * @deprecated 5.5.0
172 */
173window.tagsl10n = {
174	noPerm: '',
175	broken: ''
176};
177
178window.tagsl10n = window.tagsl10n || deprecateL10nObject( 'tagsl10n', window.tagsl10n, '5.5.0' );
179
180/**
181 * Removed in 5.5.0, needed for back-compatibility.
182 *
183 * @since 2.5.0
184 * @deprecated 5.5.0
185 */
186window.adminCommentsL10n = window.adminCommentsL10n || {
187	hotkeys_highlight_first: {
188		alternative: 'window.adminCommentsSettings.hotkeys_highlight_first',
189		func: function() { return window.adminCommentsSettings.hotkeys_highlight_first; }
190	},
191	hotkeys_highlight_last: {
192		alternative: 'window.adminCommentsSettings.hotkeys_highlight_last',
193		func: function() { return window.adminCommentsSettings.hotkeys_highlight_last; }
194	},
195	replyApprove: '',
196	reply: '',
197	warnQuickEdit: '',
198	warnCommentChanges: '',
199	docTitleComments: '',
200	docTitleCommentsCount: ''
201};
202
203window.adminCommentsL10n = deprecateL10nObject( 'adminCommentsL10n', window.adminCommentsL10n, '5.5.0' );
204
205/**
206 * Removed in 5.5.0, needed for back-compatibility.
207 *
208 * @since 2.5.0
209 * @deprecated 5.5.0
210 */
211window.tagsSuggestL10n = window.tagsSuggestL10n || {
212	tagDelimiter: '',
213	removeTerm: '',
214	termSelected: '',
215	termAdded: '',
216	termRemoved: ''
217};
218
219window.tagsSuggestL10n = deprecateL10nObject( 'tagsSuggestL10n', window.tagsSuggestL10n, '5.5.0' );
220
221/**
222 * Removed in 5.5.0, needed for back-compatibility.
223 *
224 * @since 3.5.0
225 * @deprecated 5.5.0
226 */
227window.wpColorPickerL10n = window.wpColorPickerL10n || {
228	clear: '',
229	clearAriaLabel: '',
230	defaultString: '',
231	defaultAriaLabel: '',
232	pick: '',
233	defaultLabel: ''
234};
235
236window.wpColorPickerL10n = deprecateL10nObject( 'wpColorPickerL10n', window.wpColorPickerL10n, '5.5.0' );
237
238/**
239 * Removed in 5.5.0, needed for back-compatibility.
240 *
241 * @since 2.7.0
242 * @deprecated 5.5.0
243 */
244window.attachMediaBoxL10n = window.attachMediaBoxL10n || {
245	error: ''
246};
247
248window.attachMediaBoxL10n = deprecateL10nObject( 'attachMediaBoxL10n', window.attachMediaBoxL10n, '5.5.0' );
249
250/**
251 * Removed in 5.5.0, needed for back-compatibility.
252 *
253 * @since 2.5.0
254 * @deprecated 5.5.0
255 */
256window.postL10n = window.postL10n || {
257	ok: '',
258	cancel: '',
259	publishOn: '',
260	publishOnFuture: '',
261	publishOnPast: '',
262	dateFormat: '',
263	showcomm: '',
264	endcomm: '',
265	publish: '',
266	schedule: '',
267	update: '',
268	savePending: '',
269	saveDraft: '',
270	'private': '',
271	'public': '',
272	publicSticky: '',
273	password: '',
274	privatelyPublished: '',
275	published: '',
276	saveAlert: '',
277	savingText: '',
278	permalinkSaved: ''
279};
280
281window.postL10n = deprecateL10nObject( 'postL10n', window.postL10n, '5.5.0' );
282
283/**
284 * Removed in 5.5.0, needed for back-compatibility.
285 *
286 * @since 2.7.0
287 * @deprecated 5.5.0
288 */
289window.inlineEditL10n = window.inlineEditL10n || {
290	error: '',
291	ntdeltitle: '',
292	notitle: '',
293	comma: '',
294	saved: ''
295};
296
297window.inlineEditL10n = deprecateL10nObject( 'inlineEditL10n', window.inlineEditL10n, '5.5.0' );
298
299/**
300 * Removed in 5.5.0, needed for back-compatibility.
301 *
302 * @since 2.7.0
303 * @deprecated 5.5.0
304 */
305window.plugininstallL10n = window.plugininstallL10n || {
306	plugin_information: '',
307	plugin_modal_label: '',
308	ays: ''
309};
310
311window.plugininstallL10n = deprecateL10nObject( 'plugininstallL10n', window.plugininstallL10n, '5.5.0' );
312
313/**
314 * Removed in 5.5.0, needed for back-compatibility.
315 *
316 * @since 3.0.0
317 * @deprecated 5.5.0
318 */
319window.navMenuL10n = window.navMenuL10n || {
320	noResultsFound: '',
321	warnDeleteMenu: '',
322	saveAlert: '',
323	untitled: ''
324};
325
326window.navMenuL10n = deprecateL10nObject( 'navMenuL10n', window.navMenuL10n, '5.5.0' );
327
328/**
329 * Removed in 5.5.0, needed for back-compatibility.
330 *
331 * @since 2.5.0
332 * @deprecated 5.5.0
333 */
334window.commentL10n = window.commentL10n || {
335	submittedOn: '',
336	dateFormat: ''
337};
338
339window.commentL10n = deprecateL10nObject( 'commentL10n', window.commentL10n, '5.5.0' );
340
341/**
342 * Removed in 5.5.0, needed for back-compatibility.
343 *
344 * @since 2.9.0
345 * @deprecated 5.5.0
346 */
347window.setPostThumbnailL10n = window.setPostThumbnailL10n || {
348	setThumbnail: '',
349	saving: '',
350	error: '',
351	done: ''
352};
353
354window.setPostThumbnailL10n = deprecateL10nObject( 'setPostThumbnailL10n', window.setPostThumbnailL10n, '5.5.0' );
355
356/**
357 * Removed in 6.5.0, needed for back-compatibility.
358 *
359 * @since 4.5.0
360 * @deprecated 6.5.0
361 */
362window.uiAutocompleteL10n = window.uiAutocompleteL10n || {
363	noResults: '',
364	oneResult: '',
365	manyResults: '',
366	itemSelected: ''
367};
368
369window.uiAutocompleteL10n = deprecateL10nObject( 'uiAutocompleteL10n', window.uiAutocompleteL10n, '6.5.0' );
370
371/**
372 * Removed in 3.3.0, needed for back-compatibility.
373 *
374 * @since 2.7.0
375 * @deprecated 3.3.0
376 */
377window.adminMenu = {
378	init : function() {},
379	fold : function() {},
380	restoreMenuState : function() {},
381	toggle : function() {},
382	favorites : function() {}
383};
384
385// Show/hide/save table columns.
386window.columns = {
387
388	/**
389	 * Initializes the column toggles in the screen options.
390	 *
391	 * Binds an onClick event to the checkboxes to show or hide the table columns
392	 * based on their toggled state. And persists the toggled state.
393	 *
394	 * @since 2.7.0
395	 *
396	 * @return {void}
397	 */
398	init : function() {
399		var that = this;
400		$('.hide-column-tog', '#adv-settings').on( 'click', function() {
401			var $t = $(this), column = $t.val();
402			if ( $t.prop('checked') )
403				that.checked(column);
404			else
405				that.unchecked(column);
406
407			columns.saveManageColumnsState();
408		});
409	},
410
411	/**
412	 * Saves the toggled state for the columns.
413	 *
414	 * Saves whether the columns should be shown or hidden on a page.
415	 *
416	 * @since 3.0.0
417	 *
418	 * @return {void}
419	 */
420	saveManageColumnsState : function() {
421		var hidden = this.hidden();
422		$.post(
423			ajaxurl,
424			{
425				action: 'hidden-columns',
426				hidden: hidden,
427				screenoptionnonce: $('#screenoptionnonce').val(),
428				page: pagenow
429			},
430			function() {
431				wp.a11y.speak( __( 'Screen Options updated.' ) );
432			}
433		);
434	},
435
436	/**
437	 * Makes a column visible and adjusts the column span for the table.
438	 *
439	 * @since 3.0.0
440	 * @param {string} column The column name.
441	 *
442	 * @return {void}
443	 */
444	checked : function(column) {
445		$('.column-' + column).removeClass( 'hidden' );
446		this.colSpanChange(+1);
447	},
448
449	/**
450	 * Hides a column and adjusts the column span for the table.
451	 *
452	 * @since 3.0.0
453	 * @param {string} column The column name.
454	 *
455	 * @return {void}
456	 */
457	unchecked : function(column) {
458		$('.column-' + column).addClass( 'hidden' );
459		this.colSpanChange(-1);
460	},
461
462	/**
463	 * Gets all hidden columns.
464	 *
465	 * @since 3.0.0
466	 *
467	 * @return {string} The hidden column names separated by a comma.
468	 */
469	hidden : function() {
470		return $( '.manage-column[id]' ).filter( '.hidden' ).map(function() {
471			return this.id;
472		}).get().join( ',' );
473	},
474
475	/**
476	 * Gets the checked column toggles from the screen options.
477	 *
478	 * @since 3.0.0
479	 *
480	 * @return {string} String containing the checked column names.
481	 */
482	useCheckboxesForHidden : function() {
483		this.hidden = function(){
484			return $('.hide-column-tog').not(':checked').map(function() {
485				var id = this.id;
486				return id.substring( id, id.length - 5 );
487			}).get().join(',');
488		};
489	},
490
491	/**
492	 * Adjusts the column span for the table.
493	 *
494	 * @since 3.1.0
495	 *
496	 * @param {number} diff The modifier for the column span.
497	 */
498	colSpanChange : function(diff) {
499		var $t = $('table').find('.colspanchange'), n;
500		if ( !$t.length )
501			return;
502		n = parseInt( $t.attr('colspan'), 10 ) + diff;
503		$t.attr('colspan', n.toString());
504	}
505};
506
507$( function() { columns.init(); } );
508
509/**
510 * Validates that the required form fields are not empty.
511 *
512 * @since 2.9.0
513 *
514 * @param {jQuery} form The form to validate.
515 *
516 * @return {boolean} Returns true if all required fields are not an empty string.
517 */
518window.validateForm = function( form ) {
519	return !$( form )
520		.find( '.form-required' )
521		.filter( function() { return $( ':input:visible', this ).val() === ''; } )
522		.addClass( 'form-invalid' )
523		.find( ':input:visible' )
524		.on( 'change', function() { $( this ).closest( '.form-invalid' ).removeClass( 'form-invalid' ); } )
525		.length;
526};
527
528// Stub for doing better warnings.
529/**
530 * Shows message pop-up notice or confirmation message.
531 *
532 * @since 2.7.0
533 *
534 * @type {{warn: showNotice.warn, note: showNotice.note}}
535 *
536 * @return {void}
537 */
538window.showNotice = {
539
540	/**
541	 * Shows a delete confirmation pop-up message.
542	 *
543	 * @since 2.7.0
544	 *
545	 * @return {boolean} Returns true if the message is confirmed.
546	 */
547	warn : function() {
548		if ( confirm( __( 'You are about to permanently delete these items from your site.\nThis action cannot be undone.\n\'Cancel\' to stop, \'OK\' to delete.' ) ) ) {
549			return true;
550		}
551
552		return false;
553	},
554
555	/**
556	 * Shows an alert message.
557	 *
558	 * @since 2.7.0
559	 *
560	 * @param text The text to display in the message.
561	 */
562	note : function(text) {
563		alert(text);
564	}
565};
566
567/**
568 * Represents the functions for the meta screen options panel.
569 *
570 * @since 3.2.0
571 *
572 * @type {{element: null, toggles: null, page: null, init: screenMeta.init,
573 *         toggleEvent: screenMeta.toggleEvent, open: screenMeta.open,
574 *         close: screenMeta.close}}
575 *
576 * @return {void}
577 */
578window.screenMeta = {
579	element: null, // #screen-meta
580	toggles: null, // .screen-meta-toggle
581	page:    null, // #wpcontent
582
583	/**
584	 * Initializes the screen meta options panel.
585	 *
586	 * @since 3.2.0
587	 *
588	 * @return {void}
589	 */
590	init: function() {
591		this.element = $('#screen-meta');
592		this.toggles = $( '#screen-meta-links' ).find( '.show-settings' );
593		this.page    = $('#wpcontent');
594
595		this.toggles.on( 'click', this.toggleEvent );
596	},
597
598	/**
599	 * Toggles the screen meta options panel.
600	 *
601	 * @since 3.2.0
602	 *
603	 * @return {void}
604	 */
605	toggleEvent: function() {
606		var panel = $( '#' + $( this ).attr( 'aria-controls' ) );
607
608		if ( !panel.length )
609			return;
610
611		if ( panel.is(':visible') )
612			screenMeta.close( panel, $(this) );
613		else
614			screenMeta.open( panel, $(this) );
615	},
616
617	/**
618	 * Opens the screen meta options panel.
619	 *
620	 * @since 3.2.0
621	 *
622	 * @param {jQuery} panel  The screen meta options panel div.
623	 * @param {jQuery} button The toggle button.
624	 *
625	 * @return {void}
626	 */
627	open: function( panel, button ) {
628
629		$( '#screen-meta-links' ).find( '.screen-meta-toggle' ).not( button.parent() ).css( 'visibility', 'hidden' );
630
631		panel.parent().show();
632
633		/**
634		 * Sets the focus to the meta options panel and adds the necessary CSS classes.
635		 *
636		 * @since 3.2.0
637		 *
638		 * @return {void}
639		 */
640		panel.slideDown( 'fast', function() {
641			panel.removeClass( 'hidden' ).trigger( 'focus' );
642			button.addClass( 'screen-meta-active' ).attr( 'aria-expanded', true );
643		});
644
645		$document.trigger( 'screen:options:open' );
646	},
647
648	/**
649	 * Closes the screen meta options panel.
650	 *
651	 * @since 3.2.0
652	 *
653	 * @param {jQuery} panel  The screen meta options panel div.
654	 * @param {jQuery} button The toggle button.
655	 *
656	 * @return {void}
657	 */
658	close: function( panel, button ) {
659		/**
660		 * Hides the screen meta options panel.
661		 *
662		 * @since 3.2.0
663		 *
664		 * @return {void}
665		 */
666		panel.slideUp( 'fast', function() {
667			button.removeClass( 'screen-meta-active' ).attr( 'aria-expanded', false );
668			$('.screen-meta-toggle').css('visibility', '');
669			panel.parent().hide();
670			panel.addClass( 'hidden' );
671		});
672
673		$document.trigger( 'screen:options:close' );
674	}
675};
676
677/**
678 * Initializes the help tabs in the help panel.
679 *
680 * @param {Event} e The event object.
681 *
682 * @return {void}
683 */
684$('.contextual-help-tabs').on( 'click', 'a', function(e) {
685	var link = $(this),
686		panel;
687
688	e.preventDefault();
689
690	// Don't do anything if the click is for the tab already showing.
691	if ( link.is('.active a') )
692		return false;
693
694	// Links.
695	$('.contextual-help-tabs .active').removeClass('active');
696	link.parent('li').addClass('active');
697
698	panel = $( link.attr('href') );
699
700	// Panels.
701	$('.help-tab-content').not( panel ).removeClass('active').hide();
702	panel.addClass('active').show();
703});
704
705/**
706 * Update custom permalink structure via buttons.
707 */
708var permalinkStructureFocused = false,
709    $permalinkStructure       = $( '#permalink_structure' ),
710    $permalinkStructureInputs = $( '.permalink-structure input:radio' ),
711    $permalinkCustomSelection = $( '#custom_selection' ),
712    $availableStructureTags   = $( '.form-table.permalink-structure .available-structure-tags button' );
713
714// Change permalink structure input when selecting one of the common structures.
715$permalinkStructureInputs.on( 'change', function() {
716	if ( 'custom' === this.value ) {
717		return;
718	}
719
720	$permalinkStructure.val( this.value );
721
722	// Update button states after selection.
723	$availableStructureTags.each( function() {
724		changeStructureTagButtonState( $( this ) );
725	} );
726} );
727
728$permalinkStructure.on( 'click input', function() {
729	$permalinkCustomSelection.prop( 'checked', true );
730} );
731
732// Check if the permalink structure input field has had focus at least once.
733$permalinkStructure.on( 'focus', function( event ) {
734	permalinkStructureFocused = true;
735	$( this ).off( event );
736} );
737
738/**
739 * Enables or disables a structure tag button depending on its usage.
740 *
741 * If the structure is already used in the custom permalink structure,
742 * it will be disabled.
743 *
744 * @param {Object} button Button jQuery object.
745 */
746function changeStructureTagButtonState( button ) {
747	if ( -1 !== $permalinkStructure.val().indexOf( button.text().trim() ) ) {
748		button.attr( 'data-label', button.attr( 'aria-label' ) );
749		button.attr( 'aria-label', button.attr( 'data-used' ) );
750		button.attr( 'aria-pressed', true );
751		button.addClass( 'active' );
752	} else if ( button.attr( 'data-label' ) ) {
753		button.attr( 'aria-label', button.attr( 'data-label' ) );
754		button.attr( 'aria-pressed', false );
755		button.removeClass( 'active' );
756	}
757}
758
759// Check initial button state.
760$availableStructureTags.each( function() {
761	changeStructureTagButtonState( $( this ) );
762} );
763
764// Observe permalink structure field and disable buttons of tags that are already present.
765$permalinkStructure.on( 'change', function() {
766	$availableStructureTags.each( function() {
767		changeStructureTagButtonState( $( this ) );
768	} );
769} );
770
771$availableStructureTags.on( 'click', function() {
772	var permalinkStructureValue = $permalinkStructure.val(),
773	    selectionStart          = $permalinkStructure[ 0 ].selectionStart,
774	    selectionEnd            = $permalinkStructure[ 0 ].selectionEnd,
775	    textToAppend            = $( this ).text().trim(),
776	    textToAnnounce,
777	    newSelectionStart;
778
779	if ( $( this ).hasClass( 'active' ) ) {
780		textToAnnounce = $( this ).attr( 'data-removed' );
781	} else {
782		textToAnnounce = $( this ).attr( 'data-added' );
783	}
784
785	// Remove structure tag if already part of the structure.
786	if ( -1 !== permalinkStructureValue.indexOf( textToAppend ) ) {
787		permalinkStructureValue = permalinkStructureValue.replace( textToAppend + '/', '' );
788
789		$permalinkStructure.val( '/' === permalinkStructureValue ? '' : permalinkStructureValue );
790
791		// Announce change to screen readers.
792		$( '#custom_selection_updated' ).text( textToAnnounce );
793
794		// Disable button.
795		changeStructureTagButtonState( $( this ) );
796
797		return;
798	}
799
800	// Input field never had focus, move selection to end of input.
801	if ( ! permalinkStructureFocused && 0 === selectionStart && 0 === selectionEnd ) {
802		selectionStart = selectionEnd = permalinkStructureValue.length;
803	}
804
805	$permalinkCustomSelection.prop( 'checked', true );
806
807	// Prepend and append slashes if necessary.
808	if ( '/' !== permalinkStructureValue.substr( 0, selectionStart ).substr( -1 ) ) {
809		textToAppend = '/' + textToAppend;
810	}
811
812	if ( '/' !== permalinkStructureValue.substr( selectionEnd, 1 ) ) {
813		textToAppend = textToAppend + '/';
814	}
815
816	// Insert structure tag at the specified position.
817	$permalinkStructure.val( permalinkStructureValue.substr( 0, selectionStart ) + textToAppend + permalinkStructureValue.substr( selectionEnd ) );
818
819	// Announce change to screen readers.
820	$( '#custom_selection_updated' ).text( textToAnnounce );
821
822	// Disable button.
823	changeStructureTagButtonState( $( this ) );
824
825	// If input had focus give it back with cursor right after appended text.
826	if ( permalinkStructureFocused && $permalinkStructure[0].setSelectionRange ) {
827		newSelectionStart = ( permalinkStructureValue.substr( 0, selectionStart ) + textToAppend ).length;
828		$permalinkStructure[0].setSelectionRange( newSelectionStart, newSelectionStart );
829		$permalinkStructure.trigger( 'focus' );
830	}
831} );
832
833$( function() {
834	var checks, first, last, checked, sliced, mobileEvent, transitionTimeout, focusedRowActions,
835		lastClicked = false,
836		pageInput = $('input.current-page'),
837		currentPage = pageInput.val(),
838		isIOS = /iPhone|iPad|iPod/.test( navigator.userAgent ),
839		isAndroid = navigator.userAgent.indexOf( 'Android' ) !== -1,
840		$adminMenuWrap = $( '#adminmenuwrap' ),
841		$wpwrap = $( '#wpwrap' ),
842		$adminmenu = $( '#adminmenu' ),
843		$overlay = $( '#wp-responsive-overlay' ),
844		$toolbar = $( '#wp-toolbar' ),
845		$toolbarPopups = $toolbar.find( 'a[aria-haspopup="true"]' ),
846		$sortables = $('.meta-box-sortables'),
847		wpResponsiveActive = false,
848		$adminbar = $( '#wpadminbar' ),
849		lastScrollPosition = 0,
850		pinnedMenuTop = false,
851		pinnedMenuBottom = false,
852		menuTop = 0,
853		menuState,
854		menuIsPinned = false,
855		height = {
856			window: $window.height(),
857			wpwrap: $wpwrap.height(),
858			adminbar: $adminbar.height(),
859			menu: $adminMenuWrap.height()
860		},
861		$headerEnd = $( '.wp-header-end' );
862
863	/**
864	 * Makes the fly-out submenu header clickable, when the menu is folded.
865	 *
866	 * @param {Event} e The event object.
867	 *
868	 * @return {void}
869	 */
870	$adminmenu.on('click.wp-submenu-head', '.wp-submenu-head', function(e){
871		$(e.target).parent().siblings('a').get(0).click();
872	});
873
874	/**
875	 * Collapses the admin menu.
876	 *
877	 * @return {void}
878	 */
879	$( '#collapse-button' ).on( 'click.collapse-menu', function() {
880		var viewportWidth = getViewportWidth() || 961;
881
882		// Reset any compensation for submenus near the bottom of the screen.
883		$('#adminmenu div.wp-submenu').css('margin-top', '');
884
885		if ( viewportWidth <= 960 ) {
886			if ( $body.hasClass('auto-fold') ) {
887				$body.removeClass('auto-fold').removeClass('folded');
888				setUserSetting('unfold', 1);
889				setUserSetting('mfold', 'o');
890				menuState = 'open';
891			} else {
892				$body.addClass('auto-fold');
893				setUserSetting('unfold', 0);
894				menuState = 'folded';
895			}
896		} else {
897			if ( $body.hasClass('folded') ) {
898				$body.removeClass('folded');
899				setUserSetting('mfold', 'o');
900				menuState = 'open';
901			} else {
902				$body.addClass('folded');
903				setUserSetting('mfold', 'f');
904				menuState = 'folded';
905			}
906		}
907
908		$document.trigger( 'wp-collapse-menu', { state: menuState } );
909	});
910
911	/**
912	 * Ensures an admin submenu is within the visual viewport.
913	 *
914	 * @since 4.1.0
915	 *
916	 * @param {jQuery} $menuItem The parent menu item containing the submenu.
917	 *
918	 * @return {void}
919	 */
920	function adjustSubmenu( $menuItem ) {
921		var bottomOffset, pageHeight, adjustment, theFold, menutop, wintop, maxtop,
922			$submenu = $menuItem.find( '.wp-submenu' );
923
924		menutop = $menuItem.offset().top;
925		wintop = $window.scrollTop();
926		maxtop = menutop - wintop - 30; // max = make the top of the sub almost touch admin bar.
927
928		bottomOffset = menutop + $submenu.height() + 1; // Bottom offset of the menu.
929		pageHeight = $wpwrap.height();                  // Height of the entire page.
930		adjustment = 60 + bottomOffset - pageHeight;
931		theFold = $window.height() + wintop - 50;       // The fold.
932
933		if ( theFold < ( bottomOffset - adjustment ) ) {
934			adjustment = bottomOffset - theFold;
935		}
936
937		if ( adjustment > maxtop ) {
938			adjustment = maxtop;
939		}
940
941		if ( adjustment > 1 && $('#wp-admin-bar-menu-toggle').is(':hidden') ) {
942			$submenu.css( 'margin-top', '-' + adjustment + 'px' );
943		} else {
944			$submenu.css( 'margin-top', '' );
945		}
946	}
947
948	if ( 'ontouchstart' in window || /IEMobile\/[1-9]/.test(navigator.userAgent) ) { // Touch screen device.
949		// iOS Safari works with touchstart, the rest work with click.
950		mobileEvent = isIOS ? 'touchstart' : 'click';
951
952		/**
953		 * Closes any open submenus when touch/click is not on the menu.
954		 *
955		 * @param {Event} e The event object.
956		 *
957		 * @return {void}
958		 */
959		$body.on( mobileEvent+'.wp-mobile-hover', function(e) {
960			if ( $adminmenu.data('wp-responsive') ) {
961				return;
962			}
963
964			if ( ! $( e.target ).closest( '#adminmenu' ).length ) {
965				$adminmenu.find( 'li.opensub' ).removeClass( 'opensub' );
966			}
967		});
968
969		/**
970		 * Handles the opening or closing the submenu based on the mobile click|touch event.
971		 *
972		 * @param {Event} event The event object.
973		 *
974		 * @return {void}
975		 */
976		$adminmenu.find( 'a.wp-has-submenu' ).on( mobileEvent + '.wp-mobile-hover', function( event ) {
977			var $menuItem = $(this).parent();
978
979			if ( $adminmenu.data( 'wp-responsive' ) ) {
980				return;
981			}
982
983			/*
984			 * Show the sub instead of following the link if:
985			 * 	- the submenu is not open.
986			 * 	- the submenu is not shown inline or the menu is not folded.
987			 */
988			if ( ! $menuItem.hasClass( 'opensub' ) && ( ! $menuItem.hasClass( 'wp-menu-open' ) || $menuItem.width() < 40 ) ) {
989				event.preventDefault();
990				adjustSubmenu( $menuItem );
991				$adminmenu.find( 'li.opensub' ).removeClass( 'opensub' );
992				$menuItem.addClass('opensub');
993			}
994		});
995	}
996
997	if ( ! isIOS && ! isAndroid ) {
998		$adminmenu.find( 'li.wp-has-submenu' ).hoverIntent({
999
1000			/**
1001			 * Opens the submenu when hovered over the menu item for desktops.
1002			 *
1003			 * @return {void}
1004			 */
1005			over: function() {
1006				var $menuItem = $( this ),
1007					$submenu = $menuItem.find( '.wp-submenu' ),
1008					top = parseInt( $submenu.css( 'top' ), 10 );
1009
1010				if ( isNaN( top ) || top > -5 ) { // The submenu is visible.
1011					return;
1012				}
1013
1014				if ( $adminmenu.data( 'wp-responsive' ) ) {
1015					// The menu is in responsive mode, bail.
1016					return;
1017				}
1018
1019				adjustSubmenu( $menuItem );
1020				$adminmenu.find( 'li.opensub' ).removeClass( 'opensub' );
1021				$menuItem.addClass( 'opensub' );
1022			},
1023
1024			/**
1025			 * Closes the submenu when no longer hovering the menu item.
1026			 *
1027			 * @return {void}
1028			 */
1029			out: function(){
1030				if ( $adminmenu.data( 'wp-responsive' ) ) {
1031					// The menu is in responsive mode, bail.
1032					return;
1033				}
1034
1035				$( this ).removeClass( 'opensub' ).find( '.wp-submenu' ).css( 'margin-top', '' );
1036			},
1037			timeout: 200,
1038			sensitivity: 7,
1039			interval: 90
1040		});
1041
1042		/**
1043		 * Opens the submenu on when focused on the menu item.
1044		 *
1045		 * @param {Event} event The event object.
1046		 *
1047		 * @return {void}
1048		 */
1049		$adminmenu.on( 'focus.adminmenu', '.wp-submenu a', function( event ) {
1050			if ( $adminmenu.data( 'wp-responsive' ) ) {
1051				// The menu is in responsive mode, bail.
1052				return;
1053			}
1054
1055			$( event.target ).closest( 'li.menu-top' ).addClass( 'opensub' );
1056
1057			/**
1058			 * Closes the submenu on blur from the menu item.
1059			 *
1060			 * @param {Event} event The event object.
1061			 *
1062			 * @return {void}
1063			 */
1064		}).on( 'blur.adminmenu', '.wp-submenu a', function( event ) {
1065			if ( $adminmenu.data( 'wp-responsive' ) ) {
1066				return;
1067			}
1068
1069			$( event.target ).closest( 'li.menu-top' ).removeClass( 'opensub' );
1070
1071			/**
1072			 * Adjusts the size for the submenu.
1073			 *
1074			 * @return {void}
1075			 */
1076		}).find( 'li.wp-has-submenu.wp-not-current-submenu' ).on( 'focusin.adminmenu', function() {
1077			adjustSubmenu( $( this ) );
1078		});
1079	}
1080
1081	/*
1082	 * The `.below-h2` class is here just for backward compatibility with plugins
1083	 * that are (incorrectly) using it. Do not use. Use `.inline` instead. See #34570.
1084	 * If '.wp-header-end' is found, append the notices after it otherwise
1085	 * after the first h1 or h2 heading found within the main content.
1086	 */
1087	if ( ! $headerEnd.length ) {
1088		$headerEnd = $( '.wrap h1, .wrap h2' ).first();
1089	}
1090	$( 'div.updated, div.error, div.notice' ).not( '.inline, .below-h2' ).insertAfter( $headerEnd );
1091
1092	/**
1093	 * Makes notices dismissible.
1094	 *
1095	 * @since 4.4.0
1096	 *
1097	 * @return {void}
1098	 */
1099	function makeNoticesDismissible() {
1100		$( '.notice.is-dismissible' ).each( function() {
1101			var $el = $( this ),
1102				$button = $( '<button type="button" class="notice-dismiss"><span class="screen-reader-text"></span></button>' );
1103
1104			if ( $el.find( '.notice-dismiss' ).length ) {
1105				return;
1106			}
1107
1108			// Ensure plain text.
1109			$button.find( '.screen-reader-text' ).text( __( 'Dismiss this notice.' ) );
1110			$button.on( 'click.wp-dismiss-notice', function( event ) {
1111				event.preventDefault();
1112				$el.fadeTo( 100, 0, function() {
1113					$el.slideUp( 100, function() {
1114						$el.remove();
1115					});
1116				});
1117			});
1118
1119			$el.append( $button );
1120		});
1121	}
1122
1123	$document.on( 'wp-updates-notice-added wp-plugin-install-error wp-plugin-update-error wp-plugin-delete-error wp-theme-install-error wp-theme-delete-error wp-notice-added', makeNoticesDismissible );
1124
1125	// Init screen meta.
1126	screenMeta.init();
1127
1128	/**
1129	 * Checks a checkbox.
1130	 *
1131	 * This event needs to be delegated. Ticket #37973.
1132	 *
1133	 * @return {boolean} Returns whether a checkbox is checked or not.
1134	 */
1135	$body.on( 'click', 'tbody > tr > .check-column :checkbox', function( event ) {
1136		// Shift click to select a range of checkboxes.
1137		if ( 'undefined' == event.shiftKey ) { return true; }
1138		if ( event.shiftKey ) {
1139			if ( !lastClicked ) { return true; }
1140			checks = $( lastClicked ).closest( 'form' ).find( ':checkbox' ).filter( ':visible:enabled' );
1141			first = checks.index( lastClicked );
1142			last = checks.index( this );
1143			checked = $(this).prop('checked');
1144			if ( 0 < first && 0 < last && first != last ) {
1145				sliced = ( last > first ) ? checks.slice( first, last ) : checks.slice( last, first );
1146				sliced.prop( 'checked', function() {
1147					if ( $(this).closest('tr').is(':visible') )
1148						return checked;
1149
1150					return false;
1151				});
1152			}
1153		}
1154		lastClicked = this;
1155
1156		// Toggle the "Select all" checkboxes depending if the other ones are all checked or not.
1157		var unchecked = $(this).closest('tbody').find('tr').find(':checkbox').filter(':visible:enabled').not(':checked');
1158
1159		/**
1160		 * Determines if all checkboxes are checked.
1161		 *
1162		 * @return {boolean} Returns true if there are no unchecked checkboxes.
1163		 */
1164		$(this).closest('table').children('thead, tfoot').find(':checkbox').prop('checked', function() {
1165			return ( 0 === unchecked.length );
1166		});
1167
1168		return true;
1169	});
1170
1171	/**
1172	 * Controls all the toggles on bulk toggle change.
1173	 *
1174	 * When the bulk checkbox is changed, all the checkboxes in the tables are changed accordingly.
1175	 * When the shift-button is pressed while changing the bulk checkbox the checkboxes in the table are inverted.
1176	 *
1177	 * This event needs to be delegated. Ticket #37973.
1178	 *
1179	 * @param {Event} event The event object.
1180	 *
1181	 * @return {boolean}
1182	 */
1183	$body.on( 'click.wp-toggle-checkboxes', 'thead .check-column :checkbox, tfoot .check-column :checkbox', function( event ) {
1184		var $this = $(this),
1185			$table = $this.closest( 'table' ),
1186			controlChecked = $this.prop('checked'),
1187			toggle = event.shiftKey || $this.data('wp-toggle');
1188
1189		$table.children( 'tbody' ).filter(':visible')
1190			.children().children('.check-column').find(':checkbox')
1191			/**
1192			 * Updates the checked state on the checkbox in the table.
1193			 *
1194			 * @return {boolean} True checks the checkbox, False unchecks the checkbox.
1195			 */
1196			.prop('checked', function() {
1197				if ( $(this).is(':hidden,:disabled') ) {
1198					return false;
1199				}
1200
1201				if ( toggle ) {
1202					return ! $(this).prop( 'checked' );
1203				} else if ( controlChecked ) {
1204					return true;
1205				}
1206
1207				return false;
1208			});
1209
1210		$table.children('thead,  tfoot').filter(':visible')
1211			.children().children('.check-column').find(':checkbox')
1212
1213			/**
1214			 * Syncs the bulk checkboxes on the top and bottom of the table.
1215			 *
1216			 * @return {boolean} True checks the checkbox, False unchecks the checkbox.
1217			 */
1218			.prop('checked', function() {
1219				if ( toggle ) {
1220					return false;
1221				} else if ( controlChecked ) {
1222					return true;
1223				}
1224
1225				return false;
1226			});
1227	});
1228
1229	/**
1230	 * Marries a secondary control to its primary control.
1231	 *
1232	 * @param {jQuery} topSelector    The top selector element.
1233	 * @param {jQuery} topSubmit      The top submit element.
1234	 * @param {jQuery} bottomSelector The bottom selector element.
1235	 * @param {jQuery} bottomSubmit   The bottom submit element.
1236	 * @return {void}
1237	 */
1238	function marryControls( topSelector, topSubmit, bottomSelector, bottomSubmit ) {
1239		/**
1240		 * Updates the primary selector when the secondary selector is changed.
1241		 *
1242		 * @since 5.7.0
1243		 *
1244		 * @return {void}
1245		 */
1246		function updateTopSelector() {
1247			topSelector.val($(this).val());
1248		}
1249		bottomSelector.on('change', updateTopSelector);
1250
1251		/**
1252		 * Updates the secondary selector when the primary selector is changed.
1253		 *
1254		 * @since 5.7.0
1255		 *
1256		 * @return {void}
1257		 */
1258		function updateBottomSelector() {
1259			bottomSelector.val($(this).val());
1260		}
1261		topSelector.on('change', updateBottomSelector);
1262
1263		/**
1264		 * Triggers the primary submit when then secondary submit is clicked.
1265		 *
1266		 * @since 5.7.0
1267		 *
1268		 * @return {void}
1269		 */
1270		function triggerSubmitClick(e) {
1271			e.preventDefault();
1272			e.stopPropagation();
1273
1274			topSubmit.trigger('click');
1275		}
1276		bottomSubmit.on('click', triggerSubmitClick);
1277	}
1278
1279	// Marry the secondary "Bulk actions" controls to the primary controls:
1280	marryControls( $('#bulk-action-selector-top'), $('#doaction'), $('#bulk-action-selector-bottom'), $('#doaction2') );
1281
1282	// Marry the secondary "Change role to" controls to the primary controls:
1283	marryControls( $('#new_role'), $('#changeit'), $('#new_role2'), $('#changeit2') );
1284
1285	var addAdminNotice = function( data ) {
1286		var $notice = $( data.selector ),
1287			$headerEnd = $( '.wp-header-end' ),
1288			type,
1289			dismissible,
1290			$adminNotice;
1291
1292		delete data.selector;
1293
1294		dismissible = ( data.dismissible && data.dismissible === true ) ? ' is-dismissible' : '';
1295		type        = ( data.type ) ? data.type : 'info';
1296
1297		$adminNotice = '<div id="' + data.id + '" class="notice notice-' + data.type + dismissible + '"><p>' + data.message + '</p></div>';
1298
1299		// Check if this admin notice already exists.
1300		if ( ! $notice.length ) {
1301			$notice = $( '#' + data.id );
1302		}
1303
1304		if ( $notice.length ) {
1305			$notice.replaceWith( $adminNotice );
1306		} else if ( $headerEnd.length ) {
1307			$headerEnd.after( $adminNotice );
1308		} else {
1309			if ( 'customize' === pagenow ) {
1310				$( '.customize-themes-notifications' ).append( $adminNotice );
1311			} else {
1312				$( '.wrap' ).find( '> h1' ).after( $adminNotice );
1313			}
1314		}
1315
1316		$document.trigger( 'wp-notice-added' );
1317	};
1318
1319	$( '.bulkactions' ).parents( 'form' ).on( 'submit', function( event ) {
1320		var form = this,
1321			submitterName = event.originalEvent && event.originalEvent.submitter ? event.originalEvent.submitter.name : false,
1322			currentPageSelector = form.querySelector( '#current-page-selector' );
1323
1324		if ( currentPageSelector && currentPageSelector.defaultValue !== currentPageSelector.value ) {
1325			return; // Pagination form submission.
1326		}
1327
1328		// Observe submissions from posts lists for 'bulk_action' or users lists for 'new_role'.
1329		var bulkFieldRelations = {
1330			'bulk_action' : window.bulkActionObserverIds.bulk_action,
1331			'changeit' : window.bulkActionObserverIds.changeit
1332		};
1333		if ( ! Object.keys( bulkFieldRelations ).includes( submitterName ) ) {
1334			return;
1335		}
1336
1337		var values = new FormData(form);
1338		var value = values.get( bulkFieldRelations[ submitterName ] ) || '-1';
1339
1340		// Check that the action is not the default one.
1341		if ( value !== '-1' ) {
1342			// Check that at least one item is selected.
1343			var itemsSelected = form.querySelectorAll( '.wp-list-table tbody .check-column input[type="checkbox"]:checked' );
1344
1345			if ( itemsSelected.length > 0 ) {
1346				return;
1347			}
1348		}
1349		event.preventDefault();
1350		event.stopPropagation();
1351		$( 'html, body' ).animate( { scrollTop: 0 } );
1352
1353		var errorMessage = __( 'Please select at least one item to perform this action on.' );
1354		addAdminNotice( {
1355			id: 'no-items-selected',
1356			type: 'error',
1357			message: errorMessage,
1358			dismissible: true,
1359		} );
1360
1361		wp.a11y.speak( errorMessage );
1362	});
1363
1364	/**
1365	 * Shows row actions on focus of its parent container element or any other elements contained within.
1366	 *
1367	 * @return {void}
1368	 */
1369	$( '#wpbody-content' ).on({
1370		focusin: function() {
1371			clearTimeout( transitionTimeout );
1372			focusedRowActions = $( this ).find( '.row-actions' );
1373			// transitionTimeout is necessary for Firefox, but Chrome won't remove the CSS class without a little help.
1374			$( '.row-actions' ).not( this ).removeClass( 'visible' );
1375			focusedRowActions.addClass( 'visible' );
1376		},
1377		focusout: function() {
1378			// Tabbing between post title and .row-actions links needs a brief pause, otherwise
1379			// the .row-actions div gets hidden in transit in some browsers (ahem, Firefox).
1380			transitionTimeout = setTimeout( function() {
1381				focusedRowActions.removeClass( 'visible' );
1382			}, 30 );
1383		}
1384	}, '.table-view-list .has-row-actions' );
1385
1386	// Toggle list table rows on small screens.
1387	$( 'tbody' ).on( 'click', '.toggle-row', function() {
1388		$( this ).closest( 'tr' ).toggleClass( 'is-expanded' );
1389	});
1390
1391	$('#default-password-nag-no').on( 'click', function() {
1392		setUserSetting('default_password_nag', 'hide');
1393		$('div.default-password-nag').hide();
1394		return false;
1395	});
1396
1397	/**
1398	 * Handles tab keypresses in theme and plugin file editor textareas.
1399	 *
1400	 * @param {Event} e The event object.
1401	 *
1402	 * @return {void}
1403	 */
1404	$('#newcontent').on('keydown.wpevent_InsertTab', function(e) {
1405		var el = e.target, selStart, selEnd, val, scroll, sel;
1406
1407		// After pressing escape key (keyCode: 27), the tab key should tab out of the textarea.
1408		if ( e.keyCode == 27 ) {
1409			// When pressing Escape: Opera 12 and 27 blur form fields, IE 8 clears them.
1410			e.preventDefault();
1411			$(el).data('tab-out', true);
1412			return;
1413		}
1414
1415		// Only listen for plain tab key (keyCode: 9) without any modifiers.
1416		if ( e.keyCode != 9 || e.ctrlKey || e.altKey || e.shiftKey )
1417			return;
1418
1419		// After tabbing out, reset it so next time the tab key can be used again.
1420		if ( $(el).data('tab-out') ) {
1421			$(el).data('tab-out', false);
1422			return;
1423		}
1424
1425		selStart = el.selectionStart;
1426		selEnd = el.selectionEnd;
1427		val = el.value;
1428
1429		// If any text is selected, replace the selection with a tab character.
1430		if ( document.selection ) {
1431			el.focus();
1432			sel = document.selection.createRange();
1433			sel.text = '\t';
1434		} else if ( selStart >= 0 ) {
1435			scroll = this.scrollTop;
1436			el.value = val.substring(0, selStart).concat('\t', val.substring(selEnd) );
1437			el.selectionStart = el.selectionEnd = selStart + 1;
1438			this.scrollTop = scroll;
1439		}
1440
1441		// Cancel the regular tab functionality, to prevent losing focus of the textarea.
1442		if ( e.stopPropagation )
1443			e.stopPropagation();
1444		if ( e.preventDefault )
1445			e.preventDefault();
1446	});
1447
1448	// Reset page number variable for new filters/searches but not for bulk actions. See #17685.
1449	if ( pageInput.length ) {
1450
1451		/**
1452		 * Handles pagination variable when filtering the list table.
1453		 *
1454		 * Set the pagination argument to the first page when the post-filter form is submitted.
1455		 * This happens when pressing the 'filter' button on the list table page.
1456		 *
1457		 * The pagination argument should not be touched when the bulk action dropdowns are set to do anything.
1458		 *
1459		 * The form closest to the pageInput is the post-filter form.
1460		 *
1461		 * @return {void}
1462		 */
1463		pageInput.closest('form').on( 'submit', function() {
1464			/*
1465			 * action = bulk action dropdown at the top of the table
1466			 */
1467			if ( $('select[name="action"]').val() == -1 && pageInput.val() == currentPage )
1468				pageInput.val('1');
1469		});
1470	}
1471
1472	/**
1473	 * Resets the bulk actions when the search button is clicked.
1474	 *
1475	 * @return {void}
1476	 */
1477	$('.search-box input[type="search"], .search-box input[type="submit"]').on( 'mousedown', function () {
1478		$('select[name^="action"]').val('-1');
1479	});
1480
1481	/**
1482	 * Scrolls into view when focus.scroll-into-view is triggered.
1483	 *
1484	 * @param {Event} e The event object.
1485	 *
1486	 * @return {void}
1487 	 */
1488	$('#contextual-help-link, #show-settings-link').on( 'focus.scroll-into-view', function(e){
1489		if ( e.target.scrollIntoViewIfNeeded )
1490			e.target.scrollIntoViewIfNeeded(false);
1491	});
1492
1493	/**
1494	 * Disables the submit upload buttons when no data is entered.
1495	 *
1496	 * @return {void}
1497	 */
1498	(function(){
1499		var button, input, form = $('form.wp-upload-form');
1500
1501		// Exit when no upload form is found.
1502		if ( ! form.length )
1503			return;
1504
1505		button = form.find('input[type="submit"]');
1506		input = form.find('input[type="file"]');
1507
1508		/**
1509		 * Determines if any data is entered in any file upload input.
1510		 *
1511		 * @since 3.5.0
1512		 *
1513		 * @return {void}
1514		 */
1515		function toggleUploadButton() {
1516			// When no inputs have a value, disable the upload buttons.
1517			button.prop('disabled', '' === input.map( function() {
1518				return $(this).val();
1519			}).get().join(''));
1520		}
1521
1522		// Update the status initially.
1523		toggleUploadButton();
1524		// Update the status when any file input changes.
1525		input.on('change', toggleUploadButton);
1526	})();
1527
1528	/**
1529	 * Pins the menu while distraction-free writing is enabled.
1530	 *
1531	 * @param {Event} event Event data.
1532	 *
1533	 * @since 4.1.0
1534	 *
1535	 * @return {void}
1536	 */
1537	function pinMenu( event ) {
1538		var windowPos = $window.scrollTop(),
1539			resizing = ! event || event.type !== 'scroll';
1540
1541		if ( isIOS || $adminmenu.data( 'wp-responsive' ) ) {
1542			return;
1543		}
1544
1545		/*
1546		 * When the menu is higher than the window and smaller than the entire page.
1547		 * It should be adjusted to be able to see the entire menu.
1548		 *
1549		 * Otherwise it can be accessed normally.
1550		 */
1551		if ( height.menu + height.adminbar < height.window ||
1552			height.menu + height.adminbar + 20 > height.wpwrap ) {
1553			unpinMenu();
1554			return;
1555		}
1556
1557		menuIsPinned = true;
1558
1559		// If the menu is higher than the window, compensate on scroll.
1560		if ( height.menu + height.adminbar > height.window ) {
1561			// Check for overscrolling, this happens when swiping up at the top of the document in modern browsers.
1562			if ( windowPos < 0 ) {
1563				// Stick the menu to the top.
1564				if ( ! pinnedMenuTop ) {
1565					pinnedMenuTop = true;
1566					pinnedMenuBottom = false;
1567
1568					$adminMenuWrap.css({
1569						position: 'fixed',
1570						top: '',
1571						bottom: ''
1572					});
1573				}
1574
1575				return;
1576			} else if ( windowPos + height.window > $document.height() - 1 ) {
1577				// When overscrolling at the bottom, stick the menu to the bottom.
1578				if ( ! pinnedMenuBottom ) {
1579					pinnedMenuBottom = true;
1580					pinnedMenuTop = false;
1581
1582					$adminMenuWrap.css({
1583						position: 'fixed',
1584						top: '',
1585						bottom: 0
1586					});
1587				}
1588
1589				return;
1590			}
1591
1592			if ( windowPos > lastScrollPosition ) {
1593				// When a down scroll has been detected.
1594
1595				// If it was pinned to the top, unpin and calculate relative scroll.
1596				if ( pinnedMenuTop ) {
1597					pinnedMenuTop = false;
1598					// Calculate new offset position.
1599					menuTop = $adminMenuWrap.offset().top - height.adminbar - ( windowPos - lastScrollPosition );
1600
1601					if ( menuTop + height.menu + height.adminbar < windowPos + height.window ) {
1602						menuTop = windowPos + height.window - height.menu - height.adminbar;
1603					}
1604
1605					$adminMenuWrap.css({
1606						position: 'absolute',
1607						top: menuTop,
1608						bottom: ''
1609					});
1610				} else if ( ! pinnedMenuBottom && $adminMenuWrap.offset().top + height.menu < windowPos + height.window ) {
1611					// Pin it to the bottom.
1612					pinnedMenuBottom = true;
1613
1614					$adminMenuWrap.css({
1615						position: 'fixed',
1616						top: '',
1617						bottom: 0
1618					});
1619				}
1620			} else if ( windowPos < lastScrollPosition ) {
1621				// When a scroll up is detected.
1622
1623				// If it was pinned to the bottom, unpin and calculate relative scroll.
1624				if ( pinnedMenuBottom ) {
1625					pinnedMenuBottom = false;
1626
1627					// Calculate new offset position.
1628					menuTop = $adminMenuWrap.offset().top - height.adminbar + ( lastScrollPosition - windowPos );
1629
1630					if ( menuTop + height.menu > windowPos + height.window ) {
1631						menuTop = windowPos;
1632					}
1633
1634					$adminMenuWrap.css({
1635						position: 'absolute',
1636						top: menuTop,
1637						bottom: ''
1638					});
1639				} else if ( ! pinnedMenuTop && $adminMenuWrap.offset().top >= windowPos + height.adminbar ) {
1640
1641					// Pin it to the top.
1642					pinnedMenuTop = true;
1643
1644					$adminMenuWrap.css({
1645						position: 'fixed',
1646						top: '',
1647						bottom: ''
1648					});
1649				}
1650			} else if ( resizing ) {
1651				// Window is being resized.
1652
1653				pinnedMenuTop = pinnedMenuBottom = false;
1654
1655				// Calculate the new offset.
1656				menuTop = windowPos + height.window - height.menu - height.adminbar - 1;
1657
1658				if ( menuTop > 0 ) {
1659					$adminMenuWrap.css({
1660						position: 'absolute',
1661						top: menuTop,
1662						bottom: ''
1663					});
1664				} else {
1665					unpinMenu();
1666				}
1667			}
1668		}
1669
1670		lastScrollPosition = windowPos;
1671	}
1672
1673	/**
1674	 * Determines the height of certain elements.
1675	 *
1676	 * @since 4.1.0
1677	 *
1678	 * @return {void}
1679	 */
1680	function resetHeights() {
1681		height = {
1682			window: $window.height(),
1683			wpwrap: $wpwrap.height(),
1684			adminbar: $adminbar.height(),
1685			menu: $adminMenuWrap.height()
1686		};
1687	}
1688
1689	/**
1690	 * Unpins the menu.
1691	 *
1692	 * @since 4.1.0
1693	 *
1694	 * @return {void}
1695	 */
1696	function unpinMenu() {
1697		if ( isIOS || ! menuIsPinned ) {
1698			return;
1699		}
1700
1701		pinnedMenuTop = pinnedMenuBottom = menuIsPinned = false;
1702		$adminMenuWrap.css({
1703			position: '',
1704			top: '',
1705			bottom: ''
1706		});
1707	}
1708
1709	/**
1710	 * Pins and unpins the menu when applicable.
1711	 *
1712	 * @since 4.1.0
1713	 *
1714	 * @return {void}
1715	 */
1716	function setPinMenu() {
1717		resetHeights();
1718
1719		if ( $adminmenu.data('wp-responsive') ) {
1720			$body.removeClass( 'sticky-menu' );
1721			unpinMenu();
1722		} else if ( height.menu + height.adminbar > height.window ) {
1723			pinMenu();
1724			$body.removeClass( 'sticky-menu' );
1725		} else {
1726			$body.addClass( 'sticky-menu' );
1727			unpinMenu();
1728		}
1729	}
1730
1731	if ( ! isIOS ) {
1732		$window.on( 'scroll.pin-menu', pinMenu );
1733		$document.on( 'tinymce-editor-init.pin-menu', function( event, editor ) {
1734			editor.on( 'wp-autoresize', resetHeights );
1735		});
1736	}
1737
1738	/**
1739	 * Changes the sortables and responsiveness of metaboxes.
1740	 *
1741	 * @since 3.8.0
1742	 *
1743	 * @return {void}
1744	 */
1745	window.wpResponsive = {
1746
1747		/**
1748		 * Initializes the wpResponsive object.
1749		 *
1750		 * @since 3.8.0
1751		 *
1752		 * @return {void}
1753		 */
1754		init: function() {
1755			var self = this;
1756
1757			this.maybeDisableSortables = this.maybeDisableSortables.bind( this );
1758
1759			// Modify functionality based on custom activate/deactivate event.
1760			$document.on( 'wp-responsive-activate.wp-responsive', function() {
1761				self.activate();
1762				self.toggleAriaHasPopup( 'add' );
1763			}).on( 'wp-responsive-deactivate.wp-responsive', function() {
1764				self.deactivate();
1765				self.toggleAriaHasPopup( 'remove' );
1766			});
1767
1768			$( '#wp-admin-bar-menu-toggle a' ).attr( 'aria-expanded', 'false' );
1769
1770			// Toggle sidebar when toggle is clicked.
1771			$( '#wp-admin-bar-menu-toggle' ).on( 'click.wp-responsive', function( event ) {
1772				event.preventDefault();
1773
1774				// Close any open toolbar submenus.
1775				$adminbar.find( '.hover' ).removeClass( 'hover' );
1776
1777				$wpwrap.toggleClass( 'wp-responsive-open' );
1778				if ( $wpwrap.hasClass( 'wp-responsive-open' ) ) {
1779					$(this).find('a').attr( 'aria-expanded', 'true' );
1780					$( '#adminmenu a:first' ).trigger( 'focus' );
1781				} else {
1782					$(this).find('a').attr( 'aria-expanded', 'false' );
1783				}
1784			} );
1785
1786			// Close sidebar when target moves outside of toggle and sidebar.
1787			$( document ).on( 'click', function( event ) {
1788				if ( ! $wpwrap.hasClass( 'wp-responsive-open' ) || ! document.hasFocus() ) {
1789					return;
1790				}
1791
1792				var focusIsInToggle  = $.contains( $( '#wp-admin-bar-menu-toggle' )[0], event.target );
1793				var focusIsInSidebar = $.contains( $( '#adminmenuwrap' )[0], event.target );
1794
1795				if ( ! focusIsInToggle && ! focusIsInSidebar ) {
1796					$( '#wp-admin-bar-menu-toggle' ).trigger( 'click.wp-responsive' );
1797				}
1798			} );
1799
1800			// Close sidebar when a keypress completes outside of toggle and sidebar.
1801			$( document ).on( 'keyup', function( event ) {
1802				var toggleButton   = $( '#wp-admin-bar-menu-toggle' )[0];
1803				if ( ! $wpwrap.hasClass( 'wp-responsive-open' ) ) {
1804				    return;
1805				}
1806				if ( 27 === event.keyCode ) {
1807					$( toggleButton ).trigger( 'click.wp-responsive' );
1808					$( toggleButton ).find( 'a' ).trigger( 'focus' );
1809				} else {
1810					if ( 9 === event.keyCode ) {
1811						var sidebar        = $( '#adminmenuwrap' )[0];
1812						var focusedElement = event.relatedTarget || document.activeElement;
1813						// A brief delay is required to allow focus to switch to another element.
1814						setTimeout( function() {
1815							var focusIsInToggle  = $.contains( toggleButton, focusedElement );
1816							var focusIsInSidebar = $.contains( sidebar, focusedElement );
1817
1818							if ( ! focusIsInToggle && ! focusIsInSidebar ) {
1819								$( toggleButton ).trigger( 'click.wp-responsive' );
1820							}
1821						}, 10 );
1822					}
1823				}
1824			});
1825
1826			// Add menu events.
1827			$adminmenu.on( 'click.wp-responsive', 'li.wp-has-submenu > a', function( event ) {
1828				if ( ! $adminmenu.data('wp-responsive') ) {
1829					return;
1830				}
1831				let state = ( 'false' === $( this ).attr( 'aria-expanded' ) ) ? 'true' : 'false';
1832				$( this ).parent( 'li' ).toggleClass( 'selected' );
1833				$( this ).attr( 'aria-expanded', state );
1834				$( this ).trigger( 'focus' );
1835				event.preventDefault();
1836			});
1837
1838			self.trigger();
1839			$document.on( 'wp-window-resized.wp-responsive', this.trigger.bind( this ) );
1840
1841			// This needs to run later as UI Sortable may be initialized when the document is ready.
1842			$window.on( 'load.wp-responsive', this.maybeDisableSortables );
1843			$document.on( 'postbox-toggled', this.maybeDisableSortables );
1844
1845			// When the screen columns are changed, potentially disable sortables.
1846			$( '#screen-options-wrap input' ).on( 'click', this.maybeDisableSortables );
1847		},
1848
1849		/**
1850		 * Disable sortables if there is only one metabox, or the screen is in one column mode. Otherwise, enable sortables.
1851		 *
1852		 * @since 5.3.0
1853		 *
1854		 * @return {void}
1855		 */
1856		maybeDisableSortables: function() {
1857			var width = navigator.userAgent.indexOf('AppleWebKit/') > -1 ? $window.width() : window.innerWidth;
1858
1859			if (
1860				( width <= 782 ) ||
1861				( 1 >= $sortables.find( '.ui-sortable-handle:visible' ).length && jQuery( '.columns-prefs-1 input' ).prop( 'checked' ) )
1862			) {
1863				this.disableSortables();
1864			} else {
1865				this.enableSortables();
1866			}
1867		},
1868
1869		/**
1870		 * Changes properties of body and admin menu.
1871		 *
1872		 * Pins and unpins the menu and adds the auto-fold class to the body.
1873		 * Makes the admin menu responsive and disables the metabox sortables.
1874		 *
1875		 * @since 3.8.0
1876		 *
1877		 * @return {void}
1878		 */
1879		activate: function() {
1880			setPinMenu();
1881
1882			if ( ! $body.hasClass( 'auto-fold' ) ) {
1883				$body.addClass( 'auto-fold' );
1884			}
1885
1886			$adminmenu.data( 'wp-responsive', 1 );
1887			this.disableSortables();
1888		},
1889
1890		/**
1891		 * Changes properties of admin menu and enables metabox sortables.
1892		 *
1893		 * Pin and unpin the menu.
1894		 * Removes the responsiveness of the admin menu and enables the metabox sortables.
1895		 *
1896		 * @since 3.8.0
1897		 *
1898		 * @return {void}
1899		 */
1900		deactivate: function() {
1901			setPinMenu();
1902			$adminmenu.removeData('wp-responsive');
1903
1904			this.maybeDisableSortables();
1905		},
1906
1907		/**
1908		 * Toggles the aria-haspopup attribute for the responsive admin menu.
1909		 *
1910		 * The aria-haspopup attribute is only necessary for the responsive menu.
1911		 * See ticket https://core.trac.wordpress.org/ticket/43095
1912		 *
1913		 * @since 6.6.0
1914		 *
1915		 * @param {string} action Whether to add or remove the aria-haspopup attribute.
1916		 *
1917		 * @return {void}
1918		 */
1919		toggleAriaHasPopup: function( action ) {
1920			var elements = $adminmenu.find( '[data-ariahaspopup]' );
1921
1922			if ( action === 'add' ) {
1923				elements.each( function() {
1924					$( this ).attr( 'aria-haspopup', 'menu' ).attr( 'aria-expanded', 'false' );
1925				} );
1926
1927				return;
1928			}
1929
1930			elements.each( function() {
1931				$( this ).removeAttr( 'aria-haspopup' ).removeAttr( 'aria-expanded' );
1932			} );
1933		},
1934
1935		/**
1936		 * Sets the responsiveness and enables the overlay based on the viewport width.
1937		 *
1938		 * @since 3.8.0
1939		 *
1940		 * @return {void}
1941		 */
1942		trigger: function() {
1943			var viewportWidth = getViewportWidth();
1944
1945			// Exclude IE < 9, it doesn't support @media CSS rules.
1946			if ( ! viewportWidth ) {
1947				return;
1948			}
1949
1950			if ( viewportWidth <= 782 ) {
1951				if ( ! wpResponsiveActive ) {
1952					$document.trigger( 'wp-responsive-activate' );
1953					wpResponsiveActive = true;
1954				}
1955			} else {
1956				if ( wpResponsiveActive ) {
1957					$document.trigger( 'wp-responsive-deactivate' );
1958					wpResponsiveActive = false;
1959				}
1960			}
1961
1962			if ( viewportWidth <= 480 ) {
1963				this.enableOverlay();
1964			} else {
1965				this.disableOverlay();
1966			}
1967
1968			this.maybeDisableSortables();
1969		},
1970
1971		/**
1972		 * Inserts a responsive overlay and toggles the window.
1973		 *
1974		 * @since 3.8.0
1975		 *
1976		 * @return {void}
1977		 */
1978		enableOverlay: function() {
1979			if ( $overlay.length === 0 ) {
1980				$overlay = $( '<div id="wp-responsive-overlay"></div>' )
1981					.insertAfter( '#wpcontent' )
1982					.hide()
1983					.on( 'click.wp-responsive', function() {
1984						$toolbar.find( '.menupop.hover' ).removeClass( 'hover' );
1985						$( this ).hide();
1986					});
1987			}
1988
1989			$toolbarPopups.on( 'click.wp-responsive', function() {
1990				$overlay.show();
1991			});
1992		},
1993
1994		/**
1995		 * Disables the responsive overlay and removes the overlay.
1996		 *
1997		 * @since 3.8.0
1998		 *
1999		 * @return {void}
2000		 */
2001		disableOverlay: function() {
2002			$toolbarPopups.off( 'click.wp-responsive' );
2003			$overlay.hide();
2004		},
2005
2006		/**
2007		 * Disables sortables.
2008		 *
2009		 * @since 3.8.0
2010		 *
2011		 * @return {void}
2012		 */
2013		disableSortables: function() {
2014			if ( $sortables.length ) {
2015				try {
2016					$sortables.sortable( 'disable' );
2017					$sortables.find( '.ui-sortable-handle' ).addClass( 'is-non-sortable' );
2018				} catch ( e ) {}
2019			}
2020		},
2021
2022		/**
2023		 * Enables sortables.
2024		 *
2025		 * @since 3.8.0
2026		 *
2027		 * @return {void}
2028		 */
2029		enableSortables: function() {
2030			if ( $sortables.length ) {
2031				try {
2032					$sortables.sortable( 'enable' );
2033					$sortables.find( '.ui-sortable-handle' ).removeClass( 'is-non-sortable' );
2034				} catch ( e ) {}
2035			}
2036		}
2037	};
2038
2039	/**
2040	 * Add an ARIA role `button` to elements that behave like UI controls when JavaScript is on.
2041	 *
2042	 * @since 4.5.0
2043	 *
2044	 * @return {void}
2045	 */
2046	function aria_button_if_js() {
2047		$( '.aria-button-if-js' ).attr( 'role', 'button' );
2048	}
2049
2050	$( document ).on( 'ajaxComplete', function() {
2051		aria_button_if_js();
2052	});
2053
2054	/**
2055	 * Get the viewport width.
2056	 *
2057	 * @since 4.7.0
2058	 *
2059	 * @return {number|boolean} The current viewport width or false if the
2060	 *                          browser doesn't support innerWidth (IE < 9).
2061	 */
2062	function getViewportWidth() {
2063		var viewportWidth = false;
2064
2065		if ( window.innerWidth ) {
2066			// On phones, window.innerWidth is affected by zooming.
2067			viewportWidth = Math.max( window.innerWidth, document.documentElement.clientWidth );
2068		}
2069
2070		return viewportWidth;
2071	}
2072
2073	/**
2074	 * Sets the admin menu collapsed/expanded state.
2075	 *
2076	 * Sets the global variable `menuState` and triggers a custom event passing
2077	 * the current menu state.
2078	 *
2079	 * @since 4.7.0
2080	 *
2081	 * @return {void}
2082	 */
2083	function setMenuState() {
2084		var viewportWidth = getViewportWidth() || 961;
2085
2086		if ( viewportWidth <= 782  ) {
2087			menuState = 'responsive';
2088		} else if ( $body.hasClass( 'folded' ) || ( $body.hasClass( 'auto-fold' ) && viewportWidth <= 960 && viewportWidth > 782 ) ) {
2089			menuState = 'folded';
2090		} else {
2091			menuState = 'open';
2092		}
2093
2094		$document.trigger( 'wp-menu-state-set', { state: menuState } );
2095	}
2096
2097	// Set the menu state when the window gets resized.
2098	$document.on( 'wp-window-resized.set-menu-state', setMenuState );
2099
2100	/**
2101	 * Sets ARIA attributes on the collapse/expand menu button.
2102	 *
2103	 * When the admin menu is open or folded, updates the `aria-expanded` and
2104	 * `aria-label` attributes of the button to give feedback to assistive
2105	 * technologies. In the responsive view, the button is always hidden.
2106	 *
2107	 * @since 4.7.0
2108	 *
2109	 * @return {void}
2110	 */
2111	$document.on( 'wp-menu-state-set wp-collapse-menu', function( event, eventData ) {
2112		var $collapseButton = $( '#collapse-button' ),
2113			ariaExpanded, ariaLabelText;
2114
2115		if ( 'folded' === eventData.state ) {
2116			ariaExpanded = 'false';
2117			ariaLabelText = __( 'Expand Main menu' );
2118		} else {
2119			ariaExpanded = 'true';
2120			ariaLabelText = __( 'Collapse Main menu' );
2121		}
2122
2123		$collapseButton.attr({
2124			'aria-expanded': ariaExpanded,
2125			'aria-label': ariaLabelText
2126		});
2127	});
2128
2129	window.wpResponsive.init();
2130	setPinMenu();
2131	setMenuState();
2132	makeNoticesDismissible();
2133	aria_button_if_js();
2134
2135	$document.on( 'wp-pin-menu wp-window-resized.pin-menu postboxes-columnchange.pin-menu postbox-toggled.pin-menu wp-collapse-menu.pin-menu wp-scroll-start.pin-menu', setPinMenu );
2136
2137	// Set initial focus on a specific element.
2138	$( '.wp-initial-focus' ).trigger( 'focus' );
2139
2140	// Toggle update details on update-core.php.
2141	$body.on( 'click', '.js-update-details-toggle', function() {
2142		var $updateNotice = $( this ).closest( '.js-update-details' ),
2143			$progressDiv = $( '#' + $updateNotice.data( 'update-details' ) );
2144
2145		/*
2146		 * When clicking on "Show details" move the progress div below the update
2147		 * notice. Make sure it gets moved just the first time.
2148		 */
2149		if ( ! $progressDiv.hasClass( 'update-details-moved' ) ) {
2150			$progressDiv.insertAfter( $updateNotice ).addClass( 'update-details-moved' );
2151		}
2152
2153		// Toggle the progress div visibility.
2154		$progressDiv.toggle();
2155		// Toggle the Show Details button expanded state.
2156		$( this ).attr( 'aria-expanded', $progressDiv.is( ':visible' ) );
2157	});
2158});
2159
2160/**
2161 * Hides the update button for expired plugin or theme uploads.
2162 *
2163 * On the "Update plugin/theme from uploaded zip" screen, once the upload has expired,
2164 * hides the "Replace current with uploaded" button and displays a warning.
2165 *
2166 * @since 5.5.0
2167 */
2168$( function( $ ) {
2169	var $overwrite, $warning;
2170
2171	if ( ! $body.hasClass( 'update-php' ) ) {
2172		return;
2173	}
2174
2175	$overwrite = $( 'a.update-from-upload-overwrite' );
2176	$warning   = $( '.update-from-upload-expired' );
2177
2178	if ( ! $overwrite.length || ! $warning.length ) {
2179		return;
2180	}
2181
2182	window.setTimeout(
2183		function() {
2184			$overwrite.hide();
2185			$warning.removeClass( 'hidden' );
2186
2187			if ( window.wp && window.wp.a11y ) {
2188				window.wp.a11y.speak( $warning.text() );
2189			}
2190		},
2191		7140000 // 119 minutes. The uploaded file is deleted after 2 hours.
2192	);
2193} );
2194
2195// Fire a custom jQuery event at the end of window resize.
2196( function() {
2197	var timeout;
2198
2199	/**
2200	 * Triggers the WP window-resize event.
2201	 *
2202	 * @since 3.8.0
2203	 *
2204	 * @return {void}
2205	 */
2206	function triggerEvent() {
2207		$document.trigger( 'wp-window-resized' );
2208	}
2209
2210	/**
2211	 * Fires the trigger event again after 200 ms.
2212	 *
2213	 * @since 3.8.0
2214	 *
2215	 * @return {void}
2216	 */
2217	function fireOnce() {
2218		window.clearTimeout( timeout );
2219		timeout = window.setTimeout( triggerEvent, 200 );
2220	}
2221
2222	$window.on( 'resize.wp-fire-once', fireOnce );
2223}());
2224
2225// Make Windows 8 devices play along nicely.
2226(function(){
2227	if ( '-ms-user-select' in document.documentElement.style && navigator.userAgent.match(/IEMobile\/10\.0/) ) {
2228		var msViewportStyle = document.createElement( 'style' );
2229		msViewportStyle.appendChild(
2230			document.createTextNode( '@-ms-viewport{width:auto!important}' )
2231		);
2232		document.getElementsByTagName( 'head' )[0].appendChild( msViewportStyle );
2233	}
2234})();
2235
2236}( jQuery, window ));
2237
2238/**
2239 * Freeze animated plugin icons when reduced motion is enabled.
2240 *
2241 * When the user has enabled the 'prefers-reduced-motion' setting, this module
2242 * stops animations for all GIFs on the page with the class 'plugin-icon' or
2243 * plugin icon images in the update plugins table.
2244 *
2245 * @since 6.4.0
2246 */
2247(function() {
2248	// Private variables and methods.
2249	var priv = {},
2250		pub = {},
2251		mediaQuery;
2252
2253	// Initialize pauseAll to false; it will be set to true if reduced motion is preferred.
2254	priv.pauseAll = false;
2255	if ( window.matchMedia ) {
2256		mediaQuery = window.matchMedia( '(prefers-reduced-motion: reduce)' );
2257		if ( ! mediaQuery || mediaQuery.matches ) {
2258			priv.pauseAll = true;
2259		}
2260	}
2261
2262	// Method to replace animated GIFs with a static frame.
2263	priv.freezeAnimatedPluginIcons = function( img ) {
2264		var coverImage = function() {
2265			var width = img.width;
2266			var height = img.height;
2267			var canvas = document.createElement( 'canvas' );
2268
2269			// Set canvas dimensions.
2270			canvas.width = width;
2271			canvas.height = height;
2272
2273			// Copy classes from the image to the canvas.
2274			canvas.className = img.className;
2275
2276			// Check if the image is inside a specific table.
2277			var isInsideUpdateTable = img.closest( '#update-plugins-table' );
2278
2279			if ( isInsideUpdateTable ) {
2280				// Transfer computed styles from image to canvas.
2281				var computedStyles = window.getComputedStyle( img ),
2282					i, max;
2283				for ( i = 0, max = computedStyles.length; i < max; i++ ) {
2284					var propName = computedStyles[ i ];
2285					var propValue = computedStyles.getPropertyValue( propName );
2286					canvas.style[ propName ] = propValue;
2287				}
2288			}
2289
2290			// Draw the image onto the canvas.
2291			canvas.getContext( '2d' ).drawImage( img, 0, 0, width, height );
2292
2293			// Set accessibility attributes on canvas.
2294			canvas.setAttribute( 'aria-hidden', 'true' );
2295			canvas.setAttribute( 'role', 'presentation' );
2296
2297			// Insert canvas before the image and set the image to be near-invisible.
2298			var parent = img.parentNode;
2299			parent.insertBefore( canvas, img );
2300			img.style.opacity = 0.01;
2301			img.style.width = '0px';
2302			img.style.height = '0px';
2303		};
2304
2305		// If the image is already loaded, apply the coverImage function.
2306		if ( img.complete ) {
2307			coverImage();
2308		} else {
2309			// Otherwise, wait for the image to load.
2310			img.addEventListener( 'load', coverImage, true );
2311		}
2312	};
2313
2314	// Public method to freeze all relevant GIFs on the page.
2315	pub.freezeAll = function() {
2316		var images = document.querySelectorAll( '.plugin-icon, #update-plugins-table img' );
2317		for ( var x = 0; x < images.length; x++ ) {
2318			if ( /\.gif(?:\?|$)/i.test( images[ x ].src ) ) {
2319				priv.freezeAnimatedPluginIcons( images[ x ] );
2320			}
2321		}
2322	};
2323
2324	// Only run the freezeAll method if the user prefers reduced motion.
2325	if ( true === priv.pauseAll ) {
2326		pub.freezeAll();
2327	}
2328
2329	// Listen for jQuery AJAX events.
2330	( function( $ ) {
2331		if ( window.pagenow === 'plugin-install' ) {
2332			// Only listen for ajaxComplete if this is the plugin-install.php page.
2333			$( document ).ajaxComplete( function( event, xhr, settings ) {
2334
2335				// Check if this is the 'search-install-plugins' request.
2336				if ( settings.data && typeof settings.data === 'string' && settings.data.includes( 'action=search-install-plugins' ) ) {
2337					// Recheck if the user prefers reduced motion.
2338					if ( window.matchMedia ) {
2339						var mediaQuery = window.matchMedia( '(prefers-reduced-motion: reduce)' );
2340						if ( mediaQuery.matches ) {
2341							pub.freezeAll();
2342						}
2343					} else {
2344						// Fallback for browsers that don't support matchMedia.
2345						if ( true === priv.pauseAll ) {
2346							pub.freezeAll();
2347						}
2348					}
2349				}
2350			} );
2351		}
2352	} )( jQuery );
2353
2354	// Expose public methods.
2355	return pub;
2356})();
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