1/**
  2 * @output wp-admin/js/theme-plugin-editor.js
  3 */
  4
  5/* eslint no-magic-numbers: ["error", { "ignore": [-1, 0, 1] }] */
  6
  7if ( ! window.wp ) {
  8	window.wp = {};
  9}
 10
 11wp.themePluginEditor = (function( $ ) {
 12	'use strict';
 13	var component, TreeLinks,
 14		__ = wp.i18n.__, _n = wp.i18n._n, sprintf = wp.i18n.sprintf;
 15
 16	component = {
 17		codeEditor: {},
 18		instance: null,
 19		noticeElements: {},
 20		dirty: false,
 21		lintErrors: []
 22	};
 23
 24	/**
 25	 * Initialize component.
 26	 *
 27	 * @since 4.9.0
 28	 *
 29	 * @param {jQuery}         form - Form element.
 30	 * @param {Object}         settings - Settings.
 31	 * @param {Object|boolean} settings.codeEditor - Code editor settings (or `false` if syntax highlighting is disabled).
 32	 * @return {void}
 33	 */
 34	component.init = function init( form, settings ) {
 35
 36		component.form = form;
 37		if ( settings ) {
 38			$.extend( component, settings );
 39		}
 40
 41		component.noticeTemplate = wp.template( 'wp-file-editor-notice' );
 42		component.noticesContainer = component.form.find( '.editor-notices' );
 43		component.submitButton = component.form.find( ':input[name=submit]' );
 44		component.spinner = component.form.find( '.submit .spinner' );
 45		component.form.on( 'submit', component.submit );
 46		component.textarea = component.form.find( '#newcontent' );
 47		component.textarea.on( 'change', component.onChange );
 48		component.warning = $( '.file-editor-warning' );
 49		component.docsLookUpButton = component.form.find( '#docs-lookup' );
 50		component.docsLookUpList = component.form.find( '#docs-list' );
 51
 52		if ( component.warning.length > 0 ) {
 53			component.showWarning();
 54		}
 55
 56		if ( false !== component.codeEditor ) {
 57			/*
 58			 * Defer adding notices until after DOM ready as workaround for WP Admin injecting
 59			 * its own managed dismiss buttons and also to prevent the editor from showing a notice
 60			 * when the file had linting errors to begin with.
 61			 */
 62			_.defer( function() {
 63				component.initCodeEditor();
 64			} );
 65		}
 66
 67		$( component.initFileBrowser );
 68
 69		$( window ).on( 'beforeunload', function() {
 70			if ( component.dirty ) {
 71				return __( 'The changes you made will be lost if you navigate away from this page.' );
 72			}
 73			return undefined;
 74		} );
 75
 76		component.docsLookUpList.on( 'change', function() {
 77			var option = $( this ).val();
 78			if ( '' === option ) {
 79				component.docsLookUpButton.prop( 'disabled', true );
 80			} else {
 81				component.docsLookUpButton.prop( 'disabled', false );
 82			}
 83		} );
 84	};
 85
 86	/**
 87	 * Set up and display the warning modal.
 88	 *
 89	 * @since 4.9.0
 90	 * @return {void}
 91	 */
 92	component.showWarning = function() {
 93		// Get the text within the modal.
 94		var rawMessage = component.warning.find( '.file-editor-warning-message' ).text();
 95		// Hide all the #wpwrap content from assistive technologies.
 96		$( '#wpwrap' ).attr( 'aria-hidden', 'true' );
 97		// Detach the warning modal from its position and append it to the body.
 98		$( document.body )
 99			.addClass( 'modal-open' )
100			.append( component.warning.detach() );
101		// Reveal the modal and set focus on the go back button.
102		component.warning
103			.removeClass( 'hidden' )
104			.find( '.file-editor-warning-go-back' ).trigger( 'focus' );
105		// Get the links and buttons within the modal.
106		component.warningTabbables = component.warning.find( 'a, button' );
107		// Attach event handlers.
108		component.warningTabbables.on( 'keydown', component.constrainTabbing );
109		component.warning.on( 'click', '.file-editor-warning-dismiss', component.dismissWarning );
110		// Make screen readers announce the warning message after a short delay (necessary for some screen readers).
111		setTimeout( function() {
112			wp.a11y.speak( wp.sanitize.stripTags( rawMessage.replace( /\s+/g, ' ' ) ), 'assertive' );
113		}, 1000 );
114	};
115
116	/**
117	 * Constrain tabbing within the warning modal.
118	 *
119	 * @since 4.9.0
120	 * @param {Object} event jQuery event object.
121	 * @return {void}
122	 */
123	component.constrainTabbing = function( event ) {
124		var firstTabbable, lastTabbable;
125
126		if ( 9 !== event.which ) {
127			return;
128		}
129
130		firstTabbable = component.warningTabbables.first()[0];
131		lastTabbable = component.warningTabbables.last()[0];
132
133		if ( lastTabbable === event.target && ! event.shiftKey ) {
134			firstTabbable.focus();
135			event.preventDefault();
136		} else if ( firstTabbable === event.target && event.shiftKey ) {
137			lastTabbable.focus();
138			event.preventDefault();
139		}
140	};
141
142	/**
143	 * Dismiss the warning modal.
144	 *
145	 * @since 4.9.0
146	 * @return {void}
147	 */
148	component.dismissWarning = function() {
149
150		wp.ajax.post( 'dismiss-wp-pointer', {
151			pointer: component.themeOrPlugin + '_editor_notice'
152		});
153
154		// Hide modal.
155		component.warning.remove();
156		$( '#wpwrap' ).removeAttr( 'aria-hidden' );
157		$( 'body' ).removeClass( 'modal-open' );
158	};
159
160	/**
161	 * Callback for when a change happens.
162	 *
163	 * @since 4.9.0
164	 * @return {void}
165	 */
166	component.onChange = function() {
167		component.dirty = true;
168		component.removeNotice( 'file_saved' );
169	};
170
171	/**
172	 * Submit file via Ajax.
173	 *
174	 * @since 4.9.0
175	 * @param {jQuery.Event} event - Event.
176	 * @return {void}
177	 */
178	component.submit = function( event ) {
179		var data = {}, request;
180		event.preventDefault(); // Prevent form submission in favor of Ajax below.
181		$.each( component.form.serializeArray(), function() {
182			data[ this.name ] = this.value;
183		} );
184
185		// Use value from codemirror if present.
186		if ( component.instance ) {
187			data.newcontent = component.instance.codemirror.getValue();
188		}
189
190		if ( component.isSaving ) {
191			return;
192		}
193
194		// Scroll to the line that has the error.
195		if ( component.lintErrors.length ) {
196			component.instance.codemirror.setCursor( component.lintErrors[0].from.line );
197			return;
198		}
199
200		component.isSaving = true;
201		component.textarea.prop( 'readonly', true );
202		if ( component.instance ) {
203			component.instance.codemirror.setOption( 'readOnly', true );
204		}
205
206		component.spinner.addClass( 'is-active' );
207		request = wp.ajax.post( 'edit-theme-plugin-file', data );
208
209		// Remove previous save notice before saving.
210		if ( component.lastSaveNoticeCode ) {
211			component.removeNotice( component.lastSaveNoticeCode );
212		}
213
214		request.done( function( response ) {
215			component.lastSaveNoticeCode = 'file_saved';
216			component.addNotice({
217				code: component.lastSaveNoticeCode,
218				type: 'success',
219				message: response.message,
220				dismissible: true
221			});
222			component.dirty = false;
223		} );
224
225		request.fail( function( response ) {
226			var notice = $.extend(
227				{
228					code: 'save_error',
229					message: __( 'An error occurred while saving your changes. Please try again. If the problem persists, you may need to manually update the file via FTP.' )
230				},
231				response,
232				{
233					type: 'error',
234					dismissible: true
235				}
236			);
237			component.lastSaveNoticeCode = notice.code;
238			component.addNotice( notice );
239		} );
240
241		request.always( function() {
242			component.spinner.removeClass( 'is-active' );
243			component.isSaving = false;
244
245			component.textarea.prop( 'readonly', false );
246			if ( component.instance ) {
247				component.instance.codemirror.setOption( 'readOnly', false );
248			}
249		} );
250	};
251
252	/**
253	 * Add notice.
254	 *
255	 * @since 4.9.0
256	 *
257	 * @param {Object}   notice - Notice.
258	 * @param {string}   notice.code - Code.
259	 * @param {string}   notice.type - Type.
260	 * @param {string}   notice.message - Message.
261	 * @param {boolean}  [notice.dismissible=false] - Dismissible.
262	 * @param {Function} [notice.onDismiss] - Callback for when a user dismisses the notice.
263	 * @return {jQuery} Notice element.
264	 */
265	component.addNotice = function( notice ) {
266		var noticeElement;
267
268		if ( ! notice.code ) {
269			throw new Error( 'Missing code.' );
270		}
271
272		// Only let one notice of a given type be displayed at a time.
273		component.removeNotice( notice.code );
274
275		noticeElement = $( component.noticeTemplate( notice ) );
276		noticeElement.hide();
277
278		noticeElement.find( '.notice-dismiss' ).on( 'click', function() {
279			component.removeNotice( notice.code );
280			if ( notice.onDismiss ) {
281				notice.onDismiss( notice );
282			}
283		} );
284
285		wp.a11y.speak( notice.message );
286
287		component.noticesContainer.append( noticeElement );
288		noticeElement.slideDown( 'fast' );
289		component.noticeElements[ notice.code ] = noticeElement;
290		return noticeElement;
291	};
292
293	/**
294	 * Remove notice.
295	 *
296	 * @since 4.9.0
297	 *
298	 * @param {string} code - Notice code.
299	 * @return {boolean} Whether a notice was removed.
300	 */
301	component.removeNotice = function( code ) {
302		if ( component.noticeElements[ code ] ) {
303			component.noticeElements[ code ].slideUp( 'fast', function() {
304				$( this ).remove();
305			} );
306			delete component.noticeElements[ code ];
307			return true;
308		}
309		return false;
310	};
311
312	/**
313	 * Initialize code editor.
314	 *
315	 * @since 4.9.0
316	 * @return {void}
317	 */
318	component.initCodeEditor = function initCodeEditor() {
319		var codeEditorSettings, editor;
320
321		codeEditorSettings = $.extend( {}, component.codeEditor );
322
323		/**
324		 * Handle tabbing to the field before the editor.
325		 *
326		 * @since 4.9.0
327		 *
328		 * @return {void}
329		 */
330		codeEditorSettings.onTabPrevious = function() {
331			$( '#templateside' ).find( ':tabbable' ).last().trigger( 'focus' );
332		};
333
334		/**
335		 * Handle tabbing to the field after the editor.
336		 *
337		 * @since 4.9.0
338		 *
339		 * @return {void}
340		 */
341		codeEditorSettings.onTabNext = function() {
342			$( '#template' ).find( ':tabbable:not(.CodeMirror-code)' ).first().trigger( 'focus' );
343		};
344
345		/**
346		 * Handle change to the linting errors.
347		 *
348		 * @since 4.9.0
349		 *
350		 * @param {Array} errors - List of linting errors.
351		 * @return {void}
352		 */
353		codeEditorSettings.onChangeLintingErrors = function( errors ) {
354			component.lintErrors = errors;
355
356			// Only disable the button in onUpdateErrorNotice when there are errors so users can still feel they can click the button.
357			if ( 0 === errors.length ) {
358				component.submitButton.toggleClass( 'disabled', false );
359			}
360		};
361
362		/**
363		 * Update error notice.
364		 *
365		 * @since 4.9.0
366		 *
367		 * @param {Array} errorAnnotations - Error annotations.
368		 * @return {void}
369		 */
370		codeEditorSettings.onUpdateErrorNotice = function onUpdateErrorNotice( errorAnnotations ) {
371			var noticeElement;
372
373			component.submitButton.toggleClass( 'disabled', errorAnnotations.length > 0 );
374
375			if ( 0 !== errorAnnotations.length ) {
376				noticeElement = component.addNotice({
377					code: 'lint_errors',
378					type: 'error',
379					message: sprintf(
380						/* translators: %s: Error count. */
381						_n(
382							'There is %s error which must be fixed before you can update this file.',
383							'There are %s errors which must be fixed before you can update this file.',
384							errorAnnotations.length
385						),
386						String( errorAnnotations.length )
387					),
388					dismissible: false
389				});
390				noticeElement.find( 'input[type=checkbox]' ).on( 'click', function() {
391					codeEditorSettings.onChangeLintingErrors( [] );
392					component.removeNotice( 'lint_errors' );
393				} );
394			} else {
395				component.removeNotice( 'lint_errors' );
396			}
397		};
398
399		editor = wp.codeEditor.initialize( $( '#newcontent' ), codeEditorSettings );
400		editor.codemirror.on( 'change', component.onChange );
401
402		// Improve the editor accessibility.
403		$( editor.codemirror.display.lineDiv )
404			.attr({
405				role: 'textbox',
406				'aria-multiline': 'true',
407				'aria-labelledby': 'theme-plugin-editor-label',
408				'aria-describedby': 'editor-keyboard-trap-help-1 editor-keyboard-trap-help-2 editor-keyboard-trap-help-3 editor-keyboard-trap-help-4'
409			});
410
411		// Focus the editor when clicking on its label.
412		$( '#theme-plugin-editor-label' ).on( 'click', function() {
413			editor.codemirror.focus();
414		});
415
416		component.instance = editor;
417	};
418
419	/**
420	 * Initialization of the file browser's folder states.
421	 *
422	 * @since 4.9.0
423	 * @return {void}
424	 */
425	component.initFileBrowser = function initFileBrowser() {
426
427		var $templateside = $( '#templateside' );
428
429		// Collapse all folders.
430		$templateside.find( '[role="group"]' ).parent().attr( 'aria-expanded', false );
431
432		// Expand ancestors to the current file.
433		$templateside.find( '.notice' ).parents( '[aria-expanded]' ).attr( 'aria-expanded', true );
434
435		// Find Tree elements and enhance them.
436		$templateside.find( '[role="tree"]' ).each( function() {
437			var treeLinks = new TreeLinks( this );
438			treeLinks.init();
439		} );
440
441		// Scroll the current file into view.
442		$templateside.find( '.current-file:first' ).each( function() {
443			if ( this.scrollIntoViewIfNeeded ) {
444				this.scrollIntoViewIfNeeded();
445			} else {
446				this.scrollIntoView( false );
447			}
448		} );
449	};
450
451	/* jshint ignore:start */
452	/* jscs:disable */
453	/* eslint-disable */
454
455	/**
456	 * Creates a new TreeitemLink.
457	 *
458	 * @since 4.9.0
459	 * @class
460	 * @private
461	 * @see {@link https://www.w3.org/TR/wai-aria-practices-1.1/examples/treeview/treeview-2/treeview-2b.html|W3C Treeview Example}
462	 * @license W3C-20150513
463	 */
464	var TreeitemLink = (function () {
465		/**
466		 *   This content is licensed according to the W3C Software License at
467		 *   https://www.w3.org/Consortium/Legal/2015/copyright-software-and-document
468		 *
469		 *   File:   TreeitemLink.js
470		 *
471		 *   Desc:   Treeitem widget that implements ARIA Authoring Practices
472		 *           for a tree being used as a file viewer
473		 *
474		 *   Author: Jon Gunderson, Ku Ja Eun and Nicholas Hoyt
475		 */
476
477		/**
478		 *   @constructor
479		 *
480		 *   @desc
481		 *       Treeitem object for representing the state and user interactions for a
482		 *       treeItem widget
483		 *
484		 *   @param node
485		 *       An element with the role=tree attribute
486		 */
487
488		var TreeitemLink = function (node, treeObj, group) {
489
490			// Check whether node is a DOM element.
491			if (typeof node !== 'object') {
492				return;
493			}
494
495			node.tabIndex = -1;
496			this.tree = treeObj;
497			this.groupTreeitem = group;
498			this.domNode = node;
499			this.label = node.textContent.trim();
500			this.stopDefaultClick = false;
501
502			if (node.getAttribute('aria-label')) {
503				this.label = node.getAttribute('aria-label').trim();
504			}
505
506			this.isExpandable = false;
507			this.isVisible = false;
508			this.inGroup = false;
509
510			if (group) {
511				this.inGroup = true;
512			}
513
514			var elem = node.firstElementChild;
515
516			while (elem) {
517
518				if (elem.tagName.toLowerCase() == 'ul') {
519					elem.setAttribute('role', 'group');
520					this.isExpandable = true;
521					break;
522				}
523
524				elem = elem.nextElementSibling;
525			}
526
527			this.keyCode = Object.freeze({
528				RETURN: 13,
529				SPACE: 32,
530				PAGEUP: 33,
531				PAGEDOWN: 34,
532				END: 35,
533				HOME: 36,
534				LEFT: 37,
535				UP: 38,
536				RIGHT: 39,
537				DOWN: 40
538			});
539		};
540
541		TreeitemLink.prototype.init = function () {
542			this.domNode.tabIndex = -1;
543
544			if (!this.domNode.getAttribute('role')) {
545				this.domNode.setAttribute('role', 'treeitem');
546			}
547
548			this.domNode.addEventListener('keydown', this.handleKeydown.bind(this));
549			this.domNode.addEventListener('click', this.handleClick.bind(this));
550			this.domNode.addEventListener('focus', this.handleFocus.bind(this));
551			this.domNode.addEventListener('blur', this.handleBlur.bind(this));
552
553			if (this.isExpandable) {
554				this.domNode.firstElementChild.addEventListener('mouseover', this.handleMouseOver.bind(this));
555				this.domNode.firstElementChild.addEventListener('mouseout', this.handleMouseOut.bind(this));
556			}
557			else {
558				this.domNode.addEventListener('mouseover', this.handleMouseOver.bind(this));
559				this.domNode.addEventListener('mouseout', this.handleMouseOut.bind(this));
560			}
561		};
562
563		TreeitemLink.prototype.isExpanded = function () {
564
565			if (this.isExpandable) {
566				return this.domNode.getAttribute('aria-expanded') === 'true';
567			}
568
569			return false;
570
571		};
572
573		/* EVENT HANDLERS */
574
575		TreeitemLink.prototype.handleKeydown = function (event) {
576			var tgt = event.currentTarget,
577				flag = false,
578				_char = event.key,
579				clickEvent;
580
581			function isPrintableCharacter(str) {
582				return str.length === 1 && str.match(/\S/);
583			}
584
585			function printableCharacter(item) {
586				if (_char == '*') {
587					item.tree.expandAllSiblingItems(item);
588					flag = true;
589				}
590				else {
591					if (isPrintableCharacter(_char)) {
592						item.tree.setFocusByFirstCharacter(item, _char);
593						flag = true;
594					}
595				}
596			}
597
598			this.stopDefaultClick = false;
599
600			if (event.altKey || event.ctrlKey || event.metaKey) {
601				return;
602			}
603
604			if (event.shift) {
605				if (event.keyCode == this.keyCode.SPACE || event.keyCode == this.keyCode.RETURN) {
606					event.stopPropagation();
607					this.stopDefaultClick = true;
608				}
609				else {
610					if (isPrintableCharacter(_char)) {
611						printableCharacter(this);
612					}
613				}
614			}
615			else {
616				switch (event.keyCode) {
617					case this.keyCode.SPACE:
618					case this.keyCode.RETURN:
619						if (this.isExpandable) {
620							if (this.isExpanded()) {
621								this.tree.collapseTreeitem(this);
622							}
623							else {
624								this.tree.expandTreeitem(this);
625							}
626							flag = true;
627						}
628						else {
629							event.stopPropagation();
630							this.stopDefaultClick = true;
631						}
632						break;
633
634					case this.keyCode.UP:
635						this.tree.setFocusToPreviousItem(this);
636						flag = true;
637						break;
638
639					case this.keyCode.DOWN:
640						this.tree.setFocusToNextItem(this);
641						flag = true;
642						break;
643
644					case this.keyCode.RIGHT:
645						if (this.isExpandable) {
646							if (this.isExpanded()) {
647								this.tree.setFocusToNextItem(this);
648							}
649							else {
650								this.tree.expandTreeitem(this);
651							}
652						}
653						flag = true;
654						break;
655
656					case this.keyCode.LEFT:
657						if (this.isExpandable && this.isExpanded()) {
658							this.tree.collapseTreeitem(this);
659							flag = true;
660						}
661						else {
662							if (this.inGroup) {
663								this.tree.setFocusToParentItem(this);
664								flag = true;
665							}
666						}
667						break;
668
669					case this.keyCode.HOME:
670						this.tree.setFocusToFirstItem();
671						flag = true;
672						break;
673
674					case this.keyCode.END:
675						this.tree.setFocusToLastItem();
676						flag = true;
677						break;
678
679					default:
680						if (isPrintableCharacter(_char)) {
681							printableCharacter(this);
682						}
683						break;
684				}
685			}
686
687			if (flag) {
688				event.stopPropagation();
689				event.preventDefault();
690			}
691		};
692
693		TreeitemLink.prototype.handleClick = function (event) {
694
695			// Only process click events that directly happened on this treeitem.
696			if (event.target !== this.domNode && event.target !== this.domNode.firstElementChild) {
697				return;
698			}
699
700			if (this.isExpandable) {
701				if (this.isExpanded()) {
702					this.tree.collapseTreeitem(this);
703				}
704				else {
705					this.tree.expandTreeitem(this);
706				}
707				event.stopPropagation();
708			}
709		};
710
711		TreeitemLink.prototype.handleFocus = function (event) {
712			var node = this.domNode;
713			if (this.isExpandable) {
714				node = node.firstElementChild;
715			}
716			node.classList.add('focus');
717		};
718
719		TreeitemLink.prototype.handleBlur = function (event) {
720			var node = this.domNode;
721			if (this.isExpandable) {
722				node = node.firstElementChild;
723			}
724			node.classList.remove('focus');
725		};
726
727		TreeitemLink.prototype.handleMouseOver = function (event) {
728			event.currentTarget.classList.add('hover');
729		};
730
731		TreeitemLink.prototype.handleMouseOut = function (event) {
732			event.currentTarget.classList.remove('hover');
733		};
734
735		return TreeitemLink;
736	})();
737
738	/**
739	 * Creates a new TreeLinks.
740	 *
741	 * @since 4.9.0
742	 * @class
743	 * @private
744	 * @see {@link https://www.w3.org/TR/wai-aria-practices-1.1/examples/treeview/treeview-2/treeview-2b.html|W3C Treeview Example}
745	 * @license W3C-20150513
746	 */
747	TreeLinks = (function () {
748		/*
749		 *   This content is licensed according to the W3C Software License at
750		 *   https://www.w3.org/Consortium/Legal/2015/copyright-software-and-document
751		 *
752		 *   File:   TreeLinks.js
753		 *
754		 *   Desc:   Tree widget that implements ARIA Authoring Practices
755		 *           for a tree being used as a file viewer
756		 *
757		 *   Author: Jon Gunderson, Ku Ja Eun and Nicholas Hoyt
758		 */
759
760		/*
761		 *   @constructor
762		 *
763		 *   @desc
764		 *       Tree item object for representing the state and user interactions for a
765		 *       tree widget
766		 *
767		 *   @param node
768		 *       An element with the role=tree attribute
769		 */
770
771		var TreeLinks = function (node) {
772			// Check whether node is a DOM element.
773			if (typeof node !== 'object') {
774				return;
775			}
776
777			this.domNode = node;
778
779			this.treeitems = [];
780			this.firstChars = [];
781
782			this.firstTreeitem = null;
783			this.lastTreeitem = null;
784
785		};
786
787		TreeLinks.prototype.init = function () {
788
789			function findTreeitems(node, tree, group) {
790
791				var elem = node.firstElementChild;
792				var ti = group;
793
794				while (elem) {
795
796					if ((elem.tagName.toLowerCase() === 'li' && elem.firstElementChild.tagName.toLowerCase() === 'span') || elem.tagName.toLowerCase() === 'a') {
797						ti = new TreeitemLink(elem, tree, group);
798						ti.init();
799						tree.treeitems.push(ti);
800						tree.firstChars.push(ti.label.substring(0, 1).toLowerCase());
801					}
802
803					if (elem.firstElementChild) {
804						findTreeitems(elem, tree, ti);
805					}
806
807					elem = elem.nextElementSibling;
808				}
809			}
810
811			// Initialize pop up menus.
812			if (!this.domNode.getAttribute('role')) {
813				this.domNode.setAttribute('role', 'tree');
814			}
815
816			findTreeitems(this.domNode, this, false);
817
818			this.updateVisibleTreeitems();
819
820			this.firstTreeitem.domNode.tabIndex = 0;
821
822		};
823
824		TreeLinks.prototype.setFocusToItem = function (treeitem) {
825
826			for (var i = 0; i < this.treeitems.length; i++) {
827				var ti = this.treeitems[i];
828
829				if (ti === treeitem) {
830					ti.domNode.tabIndex = 0;
831					ti.domNode.focus();
832				}
833				else {
834					ti.domNode.tabIndex = -1;
835				}
836			}
837
838		};
839
840		TreeLinks.prototype.setFocusToNextItem = function (currentItem) {
841
842			var nextItem = false;
843
844			for (var i = (this.treeitems.length - 1); i >= 0; i--) {
845				var ti = this.treeitems[i];
846				if (ti === currentItem) {
847					break;
848				}
849				if (ti.isVisible) {
850					nextItem = ti;
851				}
852			}
853
854			if (nextItem) {
855				this.setFocusToItem(nextItem);
856			}
857
858		};
859
860		TreeLinks.prototype.setFocusToPreviousItem = function (currentItem) {
861
862			var prevItem = false;
863
864			for (var i = 0; i < this.treeitems.length; i++) {
865				var ti = this.treeitems[i];
866				if (ti === currentItem) {
867					break;
868				}
869				if (ti.isVisible) {
870					prevItem = ti;
871				}
872			}
873
874			if (prevItem) {
875				this.setFocusToItem(prevItem);
876			}
877		};
878
879		TreeLinks.prototype.setFocusToParentItem = function (currentItem) {
880
881			if (currentItem.groupTreeitem) {
882				this.setFocusToItem(currentItem.groupTreeitem);
883			}
884		};
885
886		TreeLinks.prototype.setFocusToFirstItem = function () {
887			this.setFocusToItem(this.firstTreeitem);
888		};
889
890		TreeLinks.prototype.setFocusToLastItem = function () {
891			this.setFocusToItem(this.lastTreeitem);
892		};
893
894		TreeLinks.prototype.expandTreeitem = function (currentItem) {
895
896			if (currentItem.isExpandable) {
897				currentItem.domNode.setAttribute('aria-expanded', true);
898				this.updateVisibleTreeitems();
899			}
900
901		};
902
903		TreeLinks.prototype.expandAllSiblingItems = function (currentItem) {
904			for (var i = 0; i < this.treeitems.length; i++) {
905				var ti = this.treeitems[i];
906
907				if ((ti.groupTreeitem === currentItem.groupTreeitem) && ti.isExpandable) {
908					this.expandTreeitem(ti);
909				}
910			}
911
912		};
913
914		TreeLinks.prototype.collapseTreeitem = function (currentItem) {
915
916			var groupTreeitem = false;
917
918			if (currentItem.isExpanded()) {
919				groupTreeitem = currentItem;
920			}
921			else {
922				groupTreeitem = currentItem.groupTreeitem;
923			}
924
925			if (groupTreeitem) {
926				groupTreeitem.domNode.setAttribute('aria-expanded', false);
927				this.updateVisibleTreeitems();
928				this.setFocusToItem(groupTreeitem);
929			}
930
931		};
932
933		TreeLinks.prototype.updateVisibleTreeitems = function () {
934
935			this.firstTreeitem = this.treeitems[0];
936
937			for (var i = 0; i < this.treeitems.length; i++) {
938				var ti = this.treeitems[i];
939
940				var parent = ti.domNode.parentNode;
941
942				ti.isVisible = true;
943
944				while (parent && (parent !== this.domNode)) {
945
946					if (parent.getAttribute('aria-expanded') == 'false') {
947						ti.isVisible = false;
948					}
949					parent = parent.parentNode;
950				}
951
952				if (ti.isVisible) {
953					this.lastTreeitem = ti;
954				}
955			}
956
957		};
958
959		TreeLinks.prototype.setFocusByFirstCharacter = function (currentItem, _char) {
960			var start, index;
961			_char = _char.toLowerCase();
962
963			// Get start index for search based on position of currentItem.
964			start = this.treeitems.indexOf(currentItem) + 1;
965			if (start === this.treeitems.length) {
966				start = 0;
967			}
968
969			// Check remaining slots in the menu.
970			index = this.getIndexFirstChars(start, _char);
971
972			// If not found in remaining slots, check from beginning.
973			if (index === -1) {
974				index = this.getIndexFirstChars(0, _char);
975			}
976
977			// If match was found...
978			if (index > -1) {
979				this.setFocusToItem(this.treeitems[index]);
980			}
981		};
982
983		TreeLinks.prototype.getIndexFirstChars = function (startIndex, _char) {
984			for (var i = startIndex; i < this.firstChars.length; i++) {
985				if (this.treeitems[i].isVisible) {
986					if (_char === this.firstChars[i]) {
987						return i;
988					}
989				}
990			}
991			return -1;
992		};
993
994		return TreeLinks;
995	})();
996
997	/* jshint ignore:end */
998	/* jscs:enable */
999	/* eslint-enable */
1000
1001	return component;
1002})( jQuery );
1003
1004/**
1005 * Removed in 5.5.0, needed for back-compatibility.
1006 *
1007 * @since 4.9.0
1008 * @deprecated 5.5.0
1009 *
1010 * @type {object}
1011 */
1012wp.themePluginEditor.l10n = wp.themePluginEditor.l10n || {
1013	saveAlert: '',
1014	saveError: '',
1015	lintError: {
1016		alternative: 'wp.i18n',
1017		func: function() {
1018			return {
1019				singular: '',
1020				plural: ''
1021			};
1022		}
1023	}
1024};
1025
1026wp.themePluginEditor.l10n = window.wp.deprecateL10nObject( 'wp.themePluginEditor.l10n', wp.themePluginEditor.l10n, '5.5.0' );
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