/**

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* @output wp-admin/js/editor-expand.js

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*/

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( function( window, $, undefined ) {

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'use strict';

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var $window = $( window ),

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$document = $( document ),

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$adminBar = $( '#wpadminbar' ),

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$footer = $( '#wpfooter' );

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/**

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* Handles the resizing of the editor.

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*

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* @since 4.0.0

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*

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* @return {void}

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*/

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$( function() {

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var $wrap = $( '#postdivrich' ),

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$contentWrap = $( '#wp-content-wrap' ),

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$tools = $( '#wp-content-editor-tools' ),

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$visualTop = $(),

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$visualEditor = $(),

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$textTop = $( '#ed_toolbar' ),

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$textEditor = $( '#content' ),

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textEditor = $textEditor[0],

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oldTextLength = 0,

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$bottom = $( '#post-status-info' ),

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$menuBar = $(),

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$statusBar = $(),

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$sideSortables = $( '#side-sortables' ),

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$postboxContainer = $( '#postbox-container-1' ),

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$postBody = $('#post-body'),

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fullscreen = window.wp.editor && window.wp.editor.fullscreen,

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mceEditor,

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mceBind = function(){},

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mceUnbind = function(){},

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fixedTop = false,

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fixedBottom = false,

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fixedSideTop = false,

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fixedSideBottom = false,

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scrollTimer,

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lastScrollPosition = 0,

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pageYOffsetAtTop = 130,

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pinnedToolsTop = 56,

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sidebarBottom = 20,

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autoresizeMinHeight = 300,

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initialMode = $contentWrap.hasClass( 'tmce-active' ) ? 'tinymce' : 'html',

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advanced = !! parseInt( window.getUserSetting( 'hidetb' ), 10 ),

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// These are corrected when adjust() runs, except on scrolling if already set.

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heights = {

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windowHeight: 0,

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windowWidth: 0,

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adminBarHeight: 0,

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toolsHeight: 0,

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menuBarHeight: 0,

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visualTopHeight: 0,

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textTopHeight: 0,

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bottomHeight: 0,

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statusBarHeight: 0,

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sideSortablesHeight: 0

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};

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/**

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* Resizes textarea based on scroll height and width.

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*

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* Doesn't shrink the editor size below the 300px auto resize minimum height.

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*

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* @since 4.6.1

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*

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* @return {void}

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*/

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var shrinkTextarea = window._.throttle( function() {

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var x = window.scrollX || document.documentElement.scrollLeft;

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var y = window.scrollY || document.documentElement.scrollTop;

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var height = parseInt( textEditor.style.height, 10 );

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textEditor.style.height = autoresizeMinHeight + 'px';

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if ( textEditor.scrollHeight > autoresizeMinHeight ) {

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textEditor.style.height = textEditor.scrollHeight + 'px';

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}

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if ( typeof x !== 'undefined' ) {

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window.scrollTo( x, y );

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}

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if ( textEditor.scrollHeight < height ) {

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adjust();

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}

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}, 300 );

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/**

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* Resizes the text editor depending on the old text length.

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*

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* If there is an mceEditor and it is hidden, it resizes the editor depending

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* on the old text length. If the current length of the text is smaller than

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* the old text length, it shrinks the text area. Otherwise it resizes the editor to

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* the scroll height.

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*

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* @since 4.6.1

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*

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* @return {void}

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*/

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function textEditorResize() {

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var length = textEditor.value.length;

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if ( mceEditor && ! mceEditor.isHidden() ) {

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return;

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}

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if ( ! mceEditor && initialMode === 'tinymce' ) {

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return;

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}

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if ( length < oldTextLength ) {

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shrinkTextarea();

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} else if ( parseInt( textEditor.style.height, 10 ) < textEditor.scrollHeight ) {

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textEditor.style.height = Math.ceil( textEditor.scrollHeight ) + 'px';

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adjust();

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}

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oldTextLength = length;

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}

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/**

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* Gets the height and widths of elements.

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*

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* Gets the heights of the window, the adminbar, the tools, the menu,

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* the visualTop, the textTop, the bottom, the statusbar and sideSortables

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* and stores these in the heights object. Defaults to 0.

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* Gets the width of the window and stores this in the heights object.

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*

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* @since 4.0.0

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*

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* @return {void}

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*/

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function getHeights() {

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var windowWidth = $window.width();

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heights = {

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windowHeight: $window.height(),

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windowWidth: windowWidth,

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adminBarHeight: ( windowWidth > 600 ? $adminBar.outerHeight() : 0 ),

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toolsHeight: $tools.outerHeight() || 0,

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menuBarHeight: $menuBar.outerHeight() || 0,

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visualTopHeight: $visualTop.outerHeight() || 0,

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textTopHeight: $textTop.outerHeight() || 0,

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bottomHeight: $bottom.outerHeight() || 0,

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statusBarHeight: $statusBar.outerHeight() || 0,

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sideSortablesHeight: $sideSortables.height() || 0

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};

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// Adjust for hidden menubar.

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if ( heights.menuBarHeight < 3 ) {

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heights.menuBarHeight = 0;

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}

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}

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// We need to wait for TinyMCE to initialize.

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/**

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* Binds all necessary functions for editor expand to the editor when the editor

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* is initialized.

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*

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* @since 4.0.0

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*

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* @param {event} event The TinyMCE editor init event.

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* @param {object} editor The editor to bind the vents on.

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*

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* @return {void}

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*/

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$document.on( 'tinymce-editor-init.editor-expand', function( event, editor ) {

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// VK contains the type of key pressed. VK = virtual keyboard.

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var VK = window.tinymce.util.VK,

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/**

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* Hides any float panel with a hover state. Additionally hides tooltips.

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*

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* @return {void}

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*/

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hideFloatPanels = _.debounce( function() {

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! $( '.mce-floatpanel:hover' ).length && window.tinymce.ui.FloatPanel.hideAll();

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$( '.mce-tooltip' ).hide();

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}, 1000, true );

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// Make sure it's the main editor.

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if ( editor.id !== 'content' ) {

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return;

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}

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// Copy the editor instance.

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mceEditor = editor;

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// Set the minimum height to the initial viewport height.

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editor.settings.autoresize_min_height = autoresizeMinHeight;

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// Get the necessary UI elements.

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$visualTop = $contentWrap.find( '.mce-toolbar-grp' );

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$visualEditor = $contentWrap.find( '.mce-edit-area' );

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$statusBar = $contentWrap.find( '.mce-statusbar' );

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$menuBar = $contentWrap.find( '.mce-menubar' );

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/**

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* Gets the offset of the editor.

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*

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* @return {number|boolean} Returns the offset of the editor

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* or false if there is no offset height.

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*/

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function mceGetCursorOffset() {

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var node = editor.selection.getNode(),

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range, view, offset;

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/*

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* If editor.wp.getView and the selection node from the editor selection

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* are defined, use this as a view for the offset.

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*/

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if ( editor.wp && editor.wp.getView && ( view = editor.wp.getView( node ) ) ) {

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offset = view.getBoundingClientRect();

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} else {

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range = editor.selection.getRng();

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// Try to get the offset from a range.

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try {

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offset = range.getClientRects()[0];

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} catch( er ) {}

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// Get the offset from the bounding client rectangle of the node.

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if ( ! offset ) {

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offset = node.getBoundingClientRect();

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}

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}

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return offset.height ? offset : false;

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}

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/**

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* Filters the special keys that should not be used for scrolling.

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*

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* @since 4.0.0

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*

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* @param {event} event The event to get the key code from.

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*

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* @return {void}

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*/

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function mceKeyup( event ) {

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var key = event.keyCode;

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// Bail on special keys. Key code 47 is a '/'.

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if ( key <= 47 && ! ( key === VK.SPACEBAR || key === VK.ENTER || key === VK.DELETE || key === VK.BACKSPACE || key === VK.UP || key === VK.LEFT || key === VK.DOWN || key === VK.UP ) ) {

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return;

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// OS keys, function keys, num lock, scroll lock. Key code 91-93 are OS keys.

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// Key code 112-123 are F1 to F12. Key code 144 is num lock. Key code 145 is scroll lock.

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} else if ( ( key >= 91 && key <= 93 ) || ( key >= 112 && key <= 123 ) || key === 144 || key === 145 ) {

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return;

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}

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mceScroll( key );

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}

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/**

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* Makes sure the cursor is always visible in the editor.

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*

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* Makes sure the cursor is kept between the toolbars of the editor and scrolls

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* the window when the cursor moves out of the viewport to a wpview.

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* Setting a buffer > 0 will prevent the browser default.

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* Some browsers will scroll to the middle,

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* others to the top/bottom of the *window* when moving the cursor out of the viewport.

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*

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* @since 4.1.0

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*

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* @param {string} key The key code of the pressed key.

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*

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* @return {void}

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*/

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function mceScroll( key ) {

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var offset = mceGetCursorOffset(),

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buffer = 50,

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cursorTop, cursorBottom, editorTop, editorBottom;

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// Don't scroll if there is no offset.

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if ( ! offset ) {

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return;

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}

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// Determine the cursorTop based on the offset and the top of the editor iframe.

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cursorTop = offset.top + editor.iframeElement.getBoundingClientRect().top;

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// Determine the cursorBottom based on the cursorTop and offset height.

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cursorBottom = cursorTop + offset.height;

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// Subtract the buffer from the cursorTop.

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cursorTop = cursorTop - buffer;

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// Add the buffer to the cursorBottom.

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cursorBottom = cursorBottom + buffer;

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editorTop = heights.adminBarHeight + heights.toolsHeight + heights.menuBarHeight + heights.visualTopHeight;

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/*

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* Set the editorBottom based on the window Height, and add the bottomHeight and statusBarHeight if the

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* advanced editor is enabled.

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*/

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editorBottom = heights.windowHeight - ( advanced ? heights.bottomHeight + heights.statusBarHeight : 0 );

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// Don't scroll if the node is taller than the visible part of the editor.

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if ( editorBottom - editorTop < offset.height ) {

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return;

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}

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/*

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* If the cursorTop is smaller than the editorTop and the up, left

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* or backspace key is pressed, scroll the editor to the position defined

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* by the cursorTop, pageYOffset and editorTop.

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*/

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if ( cursorTop < editorTop && ( key === VK.UP || key === VK.LEFT || key === VK.BACKSPACE ) ) {

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window.scrollTo( window.pageXOffset, cursorTop + window.pageYOffset - editorTop );

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/*

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* If any other key is pressed or the cursorTop is bigger than the editorTop,

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* scroll the editor to the position defined by the cursorBottom,

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* pageYOffset and editorBottom.

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*/

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} else if ( cursorBottom > editorBottom ) {

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window.scrollTo( window.pageXOffset, cursorBottom + window.pageYOffset - editorBottom );

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}

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}

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/**

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* If the editor is fullscreen, calls adjust.

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*

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* @since 4.1.0

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*

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* @param {event} event The FullscreenStateChanged event.

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*

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* @return {void}

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*/

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function mceFullscreenToggled( event ) {

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// event.state is true if the editor is fullscreen.

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if ( ! event.state ) {

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adjust();

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}

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}

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/**

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* Shows the editor when scrolled.

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*

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* Binds the hideFloatPanels function on the window scroll.mce-float-panels event.

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* Executes the wpAutoResize on the active editor.

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*

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* @since 4.0.0

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*

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* @return {void}

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*/

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function mceShow() {

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$window.on( 'scroll.mce-float-panels', hideFloatPanels );

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setTimeout( function() {

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editor.execCommand( 'wpAutoResize' );

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adjust();

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}, 300 );

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}

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/**

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* Resizes the editor.

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*

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* Removes all functions from the window scroll.mce-float-panels event.

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* Resizes the text editor and scrolls to a position based on the pageXOffset and adminBarHeight.

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*

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* @since 4.0.0

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*

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* @return {void}

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*/

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function mceHide() {

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$window.off( 'scroll.mce-float-panels' );

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setTimeout( function() {

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var top = $contentWrap.offset().top;

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if ( window.pageYOffset > top ) {

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window.scrollTo( window.pageXOffset, top - heights.adminBarHeight );

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}

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textEditorResize();

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adjust();

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}, 100 );

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adjust();

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}

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/**

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* Toggles advanced states.

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*

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* @since 4.1.0

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*

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* @return {void}

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*/

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function toggleAdvanced() {

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advanced = ! advanced;

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}

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/**

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* Binds events of the editor and window.

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*

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* @since 4.0.0

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*

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* @return {void}

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*/

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mceBind = function() {

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editor.on( 'keyup', mceKeyup );

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editor.on( 'show', mceShow );

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editor.on( 'hide', mceHide );

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editor.on( 'wp-toolbar-toggle', toggleAdvanced );

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// Adjust when the editor resizes.

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editor.on( 'setcontent wp-autoresize wp-toolbar-toggle', adjust );

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// Don't hide the caret after undo/redo.

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editor.on( 'undo redo', mceScroll );

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// Adjust when exiting TinyMCE's fullscreen mode.

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editor.on( 'FullscreenStateChanged', mceFullscreenToggled );

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$window.off( 'scroll.mce-float-panels' ).on( 'scroll.mce-float-panels', hideFloatPanels );

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};

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/**

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* Unbinds the events of the editor and window.

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*

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* @since 4.0.0

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*

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* @return {void}

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*/

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mceUnbind = function() {

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editor.off( 'keyup', mceKeyup );

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editor.off( 'show', mceShow );

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editor.off( 'hide', mceHide );

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editor.off( 'wp-toolbar-toggle', toggleAdvanced );

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editor.off( 'setcontent wp-autoresize wp-toolbar-toggle', adjust );

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editor.off( 'undo redo', mceScroll );

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editor.off( 'FullscreenStateChanged', mceFullscreenToggled );

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$window.off( 'scroll.mce-float-panels' );

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};

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if ( $wrap.hasClass( 'wp-editor-expand' ) ) {

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// Adjust "immediately".

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mceBind();

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initialResize( adjust );

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}

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} );

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[451] Fix | Delete

/**

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* Adjusts the toolbars heights and positions.

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*

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* Adjusts the toolbars heights and positions based on the scroll position on

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* the page, the active editor mode and the heights of the editor, admin bar and

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* side bar.

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*

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* @since 4.0.0

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*

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* @param {event} event The event that calls this function.

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*

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* @return {void}

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*/

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function adjust( event ) {

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[466] Fix | Delete

// Makes sure we're not in fullscreen mode.

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if ( fullscreen && fullscreen.settings.visible ) {

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return;

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}

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var windowPos = $window.scrollTop(),

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type = event && event.type,

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resize = type !== 'scroll',

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visual = mceEditor && ! mceEditor.isHidden(),

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buffer = autoresizeMinHeight,

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postBodyTop = $postBody.offset().top,

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borderWidth = 1,

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contentWrapWidth = $contentWrap.width(),

[479] Fix | Delete

$top, $editor, sidebarTop, footerTop, canPin,

[480] Fix | Delete

topPos, topHeight, editorPos, editorHeight;

[481] Fix | Delete

[482] Fix | Delete

/*

[483] Fix | Delete

* Refresh the heights if type isn't 'scroll'

[484] Fix | Delete

* or heights.windowHeight isn't set.

[485] Fix | Delete

*/

[486] Fix | Delete

if ( resize || ! heights.windowHeight ) {

[487] Fix | Delete

getHeights();

[488] Fix | Delete

}

[489] Fix | Delete

[490] Fix | Delete

// Resize on resize event when the editor is in text mode.

[491] Fix | Delete

if ( ! visual && type === 'resize' ) {

[492] Fix | Delete

textEditorResize();

[493] Fix | Delete

}

[494] Fix | Delete

[495] Fix | Delete

if ( visual ) {

[496] Fix | Delete

$top = $visualTop;

[497] Fix | Delete

$editor = $visualEditor;

[498] Fix | Delete

topHeight = heights.visualTopHeight;

[499] Fix | Delete