Add JS files

include/jQuery/ckeditor/plugins/button/lang/af.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'af', {
+	selectedLabel: '%1 uitgekies'
+} );

include/jQuery/ckeditor/plugins/button/lang/ca.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'ca', {
+	selectedLabel: '%1 (Seleccionat)'
+} );

include/jQuery/ckeditor/plugins/button/lang/cs.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'cs', {
+	selectedLabel: '%1 (Vybráno)'
+} );

include/jQuery/ckeditor/plugins/button/lang/da.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'da', {
+	selectedLabel: '%1 (Valgt)'
+} );

include/jQuery/ckeditor/plugins/button/lang/de.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'de', {
+	selectedLabel: '%1 (Ausgewählt)'
+} );

include/jQuery/ckeditor/plugins/button/lang/el.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'el', {
+	selectedLabel: '%1 (Επιλεγμένο)'
+} );

include/jQuery/ckeditor/plugins/button/lang/en-gb.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'en-gb', {
+	selectedLabel: '%1 (Selected)'
+} );

include/jQuery/ckeditor/plugins/button/lang/en.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'en', {
+	selectedLabel: '%1 (Selected)'
+} );

include/jQuery/ckeditor/plugins/button/lang/eo.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'eo', {
+	selectedLabel: '%1 (Selektita)'
+} );

include/jQuery/ckeditor/plugins/button/lang/fa.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'fa', {
+	selectedLabel: '%1 (انتخاب شده)'
+} );

include/jQuery/ckeditor/plugins/button/lang/fi.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'fi', {
+	selectedLabel: '%1 (Valittu)'
+} );

include/jQuery/ckeditor/plugins/button/lang/fr.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'fr', {
+	selectedLabel: '%1 (Sélectionné)'
+} );

include/jQuery/ckeditor/plugins/button/lang/gl.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'gl', {
+	selectedLabel: '%1 (seleccionado)'
+} );

include/jQuery/ckeditor/plugins/button/lang/he.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'he', {
+	selectedLabel: '1% (סומן)'
+} );

include/jQuery/ckeditor/plugins/button/lang/hu.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'hu', {
+	selectedLabel: '%1 (Kiválasztva)'
+} );

include/jQuery/ckeditor/plugins/button/lang/it.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'it', {
+	selectedLabel: '%1 (selezionato)'
+} );

include/jQuery/ckeditor/plugins/button/lang/ja.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'ja', {
+	selectedLabel: '%1 (選択中)'
+} );

include/jQuery/ckeditor/plugins/button/lang/km.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'km', {
+	selectedLabel: '%1 (បាន​ជ្រើស​រើស)'
+} );

include/jQuery/ckeditor/plugins/button/lang/ku.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'ku', {
+	selectedLabel: '%1 (هەڵبژێردراو)'
+} );

include/jQuery/ckeditor/plugins/button/lang/lt.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'lt', {
+	selectedLabel: '%1 (Pasirinkta)'
+} );

include/jQuery/ckeditor/plugins/button/lang/nb.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'nb', {
+	selectedLabel: '%1 (Valgt)'
+} );

include/jQuery/ckeditor/plugins/button/lang/nl.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'nl', {
+	selectedLabel: '%1 (Geselecteerd)'
+} );

include/jQuery/ckeditor/plugins/button/lang/pl.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'pl', {
+	selectedLabel: '%1 (Wybrany)'
+} );

include/jQuery/ckeditor/plugins/button/lang/pt-br.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'pt-br', {
+	selectedLabel: '%1 (Selecionado)'
+} );

include/jQuery/ckeditor/plugins/button/lang/pt.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'pt', {
+	selectedLabel: '%1 (Selecionado)'
+} );

include/jQuery/ckeditor/plugins/button/lang/ro.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'ro', {
+	selectedLabel: '%1 (Selectat)'
+} );

include/jQuery/ckeditor/plugins/button/lang/ru.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'ru', {
+	selectedLabel: '%1 (Выбрано)'
+} );

include/jQuery/ckeditor/plugins/button/lang/sk.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'sk', {
+	selectedLabel: '%1 (Vybrané)'
+} );

include/jQuery/ckeditor/plugins/button/lang/sl.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'sl', {
+	selectedLabel: '%1 (Izbrano)'
+} );

include/jQuery/ckeditor/plugins/button/lang/sq.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'sq', {
+	selectedLabel: '%1 (Përzgjedhur)'
+} );

include/jQuery/ckeditor/plugins/button/lang/sv.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'sv', {
+	selectedLabel: '%1 (Vald)'
+} );

include/jQuery/ckeditor/plugins/button/lang/tr.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'tr', {
+	selectedLabel: '%1 (Seçilmiş)'
+} );

include/jQuery/ckeditor/plugins/button/lang/tt.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'tt', {
+	selectedLabel: '%1 (Сайланган)'
+} );

include/jQuery/ckeditor/plugins/button/lang/uk.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'uk', {
+	selectedLabel: '%1 (Вибрано)'
+} );

include/jQuery/ckeditor/plugins/button/lang/vi.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'vi', {
+	selectedLabel: '%1 (Đã chọn)'
+} );

include/jQuery/ckeditor/plugins/button/lang/zh-cn.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'zh-cn', {
+	selectedLabel: '已选中 %1 项'
+} );

include/jQuery/ckeditor/plugins/button/lang/zh.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.setLang( 'button', 'zh', {
+	selectedLabel: '%1 (已選取)'
+} );

include/jQuery/ckeditor/plugins/button/plugin.js

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+/**
+ * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or http://ckeditor.com/license
+ */
+
+( function() {
+	var template = '<a id="{id}"' +
+		' class="cke_button cke_button__{name} cke_button_{state} {cls}"' +
+		( CKEDITOR.env.gecko && !CKEDITOR.env.hc ? '' : ' href="javascript:void(\'{titleJs}\')"' ) +
+		' title="{title}"' +
+		' tabindex="-1"' +
+		' hidefocus="true"' +
+		' role="button"' +
+		' aria-labelledby="{id}_label"' +
+		' aria-haspopup="{hasArrow}"' +
+		' aria-disabled="{ariaDisabled}"';
+
+	// Some browsers don't cancel key events in the keydown but in the
+	// keypress.
+	// TODO: Check if really needed.
+	if ( CKEDITOR.env.gecko && CKEDITOR.env.mac )
+		template += ' onkeypress="return false;"';
+
+	// With Firefox, we need to force the button to redraw, otherwise it
+	// will remain in the focus state.
+	if ( CKEDITOR.env.gecko )
+		template += ' onblur="this.style.cssText = this.style.cssText;"';
+
+	template += ' onkeydown="return CKEDITOR.tools.callFunction({keydownFn},event);"' +
+		' onfocus="return CKEDITOR.tools.callFunction({focusFn},event);" ' +
+		( CKEDITOR.env.ie ? 'onclick="return false;" onmouseup' : 'onclick' ) + // #188
+			'="CKEDITOR.tools.callFunction({clickFn},this);return false;">' +
+		'<span class="cke_button_icon cke_button__{iconName}_icon" style="{style}"';
+
+
+	template += '>&nbsp;</span>' +
+		'<span id="{id}_label" class="cke_button_label cke_button__{name}_label" aria-hidden="false">{label}</span>' +
+		'{arrowHtml}' +
+		'</a>';
+
+	var templateArrow = '<span class="cke_button_arrow">' +
+		// BLACK DOWN-POINTING TRIANGLE
+	( CKEDITOR.env.hc ? '&#9660;' : '' ) +
+		'</span>';
+
+	var btnArrowTpl = CKEDITOR.addTemplate( 'buttonArrow', templateArrow ),
+		btnTpl = CKEDITOR.addTemplate( 'button', template );
+
+	CKEDITOR.plugins.add( 'button', {
+		lang: 'af,ca,cs,da,de,el,en,en-gb,eo,fa,fi,fr,gl,he,hu,it,ja,km,ku,lt,nb,nl,pl,pt,pt-br,ro,ru,sk,sl,sq,sv,tr,tt,uk,vi,zh,zh-cn', // %REMOVE_LINE_CORE%
+		beforeInit: function( editor ) {
+			editor.ui.addHandler( CKEDITOR.UI_BUTTON, CKEDITOR.ui.button.handler );
+		}
+	} );
+
+	/**
+	 * Button UI element.
+	 *
+	 * @readonly
+	 * @property {String} [='button']
+	 * @member CKEDITOR
+	 */
+	CKEDITOR.UI_BUTTON = 'button';
+
+	/**
+	 * Represents a button UI element. This class should not be called directly. To
+	 * create new buttons use {@link CKEDITOR.ui#addButton} instead.
+	 *
+	 * @class
+	 * @constructor Creates a button class instance.
+	 * @param {Object} definition The button definition.
+	 */
+	CKEDITOR.ui.button = function( definition ) {
+		CKEDITOR.tools.extend( this, definition,
+		// Set defaults.
+		{
+			title: definition.label,
+			click: definition.click ||
+			function( editor ) {
+				editor.execCommand( definition.command );
+			}
+		} );
+
+		this._ = {};
+	};
+
+	/**
+	 * Represents the button handler object.
+	 *
+	 * @class
+	 * @singleton
+	 * @extends CKEDITOR.ui.handlerDefinition
+	 */
+	CKEDITOR.ui.button.handler = {
+		/**
+		 * Transforms a button definition in a {@link CKEDITOR.ui.button} instance.
+		 *
+		 * @member CKEDITOR.ui.button.handler
+		 * @param {Object} definition
+		 * @returns {CKEDITOR.ui.button}
+		 */
+		create: function( definition ) {
+			return new CKEDITOR.ui.button( definition );
+		}
+	};
+
+	/** @class CKEDITOR.ui.button */
+	CKEDITOR.ui.button.prototype = {
+		/**
+		 * Renders the button.
+		 *
+		 * @param {CKEDITOR.editor} editor The editor instance which this button is
+		 * to be used by.
+		 * @param {Array} output The output array to which the HTML code related to
+		 * this button should be appended.
+		 */
+		render: function( editor, output ) {
+			function updateState() {
+				// "this" is a CKEDITOR.ui.button instance.
+				var mode = editor.mode;
+
+				if ( mode ) {
+					// Restore saved button state.
+					var state = this.modes[ mode ] ? modeStates[ mode ] !== undefined ? modeStates[ mode ] : CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED;
+
+					state = editor.readOnly && !this.readOnly ? CKEDITOR.TRISTATE_DISABLED : state;
+
+					this.setState( state );
+
+					// Let plugin to disable button.
+					if ( this.refresh )
+						this.refresh();
+				}
+			}
+
+			var env = CKEDITOR.env,
+				id = this._.id = CKEDITOR.tools.getNextId(),
+				stateName = '',
+				command = this.command,
+				// Get the command name.
+				clickFn;
+
+			this._.editor = editor;
+
+			var instance = {
+				id: id,
+				button: this,
+				editor: editor,
+				focus: function() {
+					var element = CKEDITOR.document.getById( id );
+					element.focus();
+				},
+				execute: function() {
+					this.button.click( editor );
+				},
+				attach: function( editor ) {
+					this.button.attach( editor );
+				}
+			};
+
+			var keydownFn = CKEDITOR.tools.addFunction( function( ev ) {
+				if ( instance.onkey ) {
+					ev = new CKEDITOR.dom.event( ev );
+					return ( instance.onkey( instance, ev.getKeystroke() ) !== false );
+				}
+			} );
+
+			var focusFn = CKEDITOR.tools.addFunction( function( ev ) {
+				var retVal;
+
+				if ( instance.onfocus )
+					retVal = ( instance.onfocus( instance, new CKEDITOR.dom.event( ev ) ) !== false );
+
+				return retVal;
+			} );
+
+			var selLocked = 0;
+
+			instance.clickFn = clickFn = CKEDITOR.tools.addFunction( function() {
+
+				// Restore locked selection in Opera.
+				if ( selLocked ) {
+					editor.unlockSelection( 1 );
+					selLocked = 0;
+				}
+				instance.execute();
+
+				// Fixed iOS focus issue when your press disabled button (#12381).
+				if ( env.iOS ) {
+					editor.focus();
+				}
+			} );
+
+
+			// Indicate a mode sensitive button.
+			if ( this.modes ) {
+				var modeStates = {};
+
+				editor.on( 'beforeModeUnload', function() {
+					if ( editor.mode && this._.state != CKEDITOR.TRISTATE_DISABLED )
+						modeStates[ editor.mode ] = this._.state;
+				}, this );
+
+				// Update status when activeFilter, mode or readOnly changes.
+				editor.on( 'activeFilterChange', updateState, this );
+				editor.on( 'mode', updateState, this );
+				// If this button is sensitive to readOnly state, update it accordingly.
+				!this.readOnly && editor.on( 'readOnly', updateState, this );
+
+			} else if ( command ) {
+				// Get the command instance.
+				command = editor.getCommand( command );
+
+				if ( command ) {
+					command.on( 'state', function() {
+						this.setState( command.state );
+					}, this );
+
+					stateName += ( command.state == CKEDITOR.TRISTATE_ON ? 'on' : command.state == CKEDITOR.TRISTATE_DISABLED ? 'disabled' : 'off' );
+				}
+			}
+
+			// For button that has text-direction awareness on selection path.
+			if ( this.directional ) {
+				editor.on( 'contentDirChanged', function( evt ) {
+					var el = CKEDITOR.document.getById( this._.id ),
+						icon = el.getFirst();
+
+					var pathDir = evt.data;
+
+					// Make a minor direction change to become style-able for the skin icon.
+					if ( pathDir !=  editor.lang.dir )
+						el.addClass( 'cke_' + pathDir );
+					else
+						el.removeClass( 'cke_ltr' ).removeClass( 'cke_rtl' );
+
+					// Inline style update for the plugin icon.
+					icon.setAttribute( 'style', CKEDITOR.skin.getIconStyle( iconName, pathDir == 'rtl', this.icon, this.iconOffset ) );
+				}, this );
+			}
+
+			if ( !command )
+				stateName += 'off';
+
+			var name = this.name || this.command,
+				iconName = name;
+
+			// Check if we're pointing to an icon defined by another command. (#9555)
+			if ( this.icon && !( /\./ ).test( this.icon ) ) {
+				iconName = this.icon;
+				this.icon = null;
+			}
+
+			var params = {
+				id: id,
+				name: name,
+				iconName: iconName,
+				label: this.label,
+				cls: this.className || '',
+				state: stateName,
+				ariaDisabled: stateName == 'disabled' ? 'true' : 'false',
+				title: this.title,
+				titleJs: env.gecko && !env.hc ? '' : ( this.title || '' ).replace( "'", '' ),
+				hasArrow: this.hasArrow ? 'true' : 'false',
+				keydownFn: keydownFn,
+				focusFn: focusFn,
+				clickFn: clickFn,
+				style: CKEDITOR.skin.getIconStyle( iconName, ( editor.lang.dir == 'rtl' ), this.icon, this.iconOffset ),
+				arrowHtml: this.hasArrow ? btnArrowTpl.output() : ''
+			};
+
+			btnTpl.output( params, output );
+
+			if ( this.onRender )
+				this.onRender();
+
+			return instance;
+		},
+
+		/**
+		 * Sets the button state.
+		 *
+		 * @param {Number} state Indicates the button state. One of {@link CKEDITOR#TRISTATE_ON},
+		 * {@link CKEDITOR#TRISTATE_OFF}, or {@link CKEDITOR#TRISTATE_DISABLED}.
+		 */
+		setState: function( state ) {
+			if ( this._.state == state )
+				return false;
+
+			this._.state = state;
+
+			var element = CKEDITOR.document.getById( this._.id );
+
+			if ( element ) {
+				element.setState( state, 'cke_button' );
+
+				state == CKEDITOR.TRISTATE_DISABLED ?
+					element.setAttribute( 'aria-disabled', true ) :
+					element.removeAttribute( 'aria-disabled' );
+
+				if ( !this.hasArrow ) {
+					// Note: aria-pressed attribute should not be added to menuButton instances. (#11331)
+					state == CKEDITOR.TRISTATE_ON ?
+						element.setAttribute( 'aria-pressed', true ) :
+						element.removeAttribute( 'aria-pressed' );
+				} else {
+					var newLabel = state == CKEDITOR.TRISTATE_ON ?
+						this._.editor.lang.button.selectedLabel.replace( /%1/g, this.label ) : this.label;
+					CKEDITOR.document.getById( this._.id + '_label' ).setText( newLabel );
+				}
+
+				return true;
+			} else {
+				return false;
+			}
+		},
+
+		/**
+		 * Gets the button state.
+		 *
+		 * @returns {Number} The button state. One of {@link CKEDITOR#TRISTATE_ON},
+		 * {@link CKEDITOR#TRISTATE_OFF}, or {@link CKEDITOR#TRISTATE_DISABLED}.
+		 */
+		getState: function() {
+			return this._.state;
+		},
+
+		/**
+		 * Returns this button's {@link CKEDITOR.feature} instance.
+		 *
+		 * It may be this button instance if it has at least one of
+		 * `allowedContent` and `requiredContent` properties. Otherwise,
+		 * if a command is bound to this button by the `command` property, then
+		 * that command will be returned.
+		 *
+		 * This method implements the {@link CKEDITOR.feature#toFeature} interface method.
+		 *
+		 * @since 4.1
+		 * @param {CKEDITOR.editor} Editor instance.
+		 * @returns {CKEDITOR.feature} The feature.
+		 */
+		toFeature: function( editor ) {
+			if ( this._.feature )
+				return this._.feature;
+
+			var feature = this;
+
+			// If button isn't a feature, return command if is bound.
+			if ( !this.allowedContent && !this.requiredContent && this.command )
+				feature = editor.getCommand( this.command ) || feature;
+
+			return this._.feature = feature;
+		}
+	};
+
+	/**
+	 * Adds a button definition to the UI elements list.
+	 *
+	 *		editorInstance.ui.addButton( 'MyBold', {
+	 *			label: 'My Bold',
+	 *			command: 'bold',
+	 *			toolbar: 'basicstyles,1'
+	 *		} );
+	 *
+	 * @member CKEDITOR.ui
+	 * @param {String} name The button name.
+	 * @param {Object} definition The button definition.
+	 * @param {String} definition.label The textual part of the button (if visible) and its tooltip.
+	 * @param {String} definition.command The command to be executed once the button is activated.
+	 * @param {String} definition.toolbar The {@link CKEDITOR.config#toolbarGroups toolbar group} into which
+	 * the button will be added. An optional index value (separated by a comma) determines the button position within the group.
+	 */
+	CKEDITOR.ui.prototype.addButton = function( name, definition ) {
+		this.add( name, CKEDITOR.UI_BUTTON, definition );
+	};
+
+} )();