text: ﻿/**
   * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
   * For licensing, see LICENSE.md or http://ckeditor.com/license
   */
  
  CKEDITOR.plugins.add( 'floatpanel', {
  	requires: 'panel'
  } );
  
  ( function() {
  	var panels = {};
  
  	function getPanel( editor, doc, parentElement, definition, level ) {
  		// Generates the panel key: docId-eleId-skinName-langDir[-uiColor][-CSSs][-level]
  		var key = CKEDITOR.tools.genKey( doc.getUniqueId(), parentElement.getUniqueId(), editor.lang.dir, editor.uiColor || '', definition.css || '', level || '' ),
  			panel = panels[ key ];
  
  		if ( !panel ) {
  			panel = panels[ key ] = new CKEDITOR.ui.panel( doc, definition );
  			panel.element = parentElement.append( CKEDITOR.dom.element.createFromHtml( panel.render( editor ), doc ) );
  
  			panel.element.setStyles( {
  				display: 'none',
  				position: 'absolute'
  			} );
  		}
  
  		return panel;
  	}
  
  	/**
  	 * Represents a floating panel UI element.
  	 *
  	 * It is reused by rich combos, color combos, menus, etc.
  	 * and it renders its content using {@link CKEDITOR.ui.panel}.
  	 *
  	 * @class
  	 * @todo
  	 */
  	CKEDITOR.ui.floatPanel = CKEDITOR.tools.createClass( {
  		/**
  		 * Creates a floatPanel class instance.
  		 *
  		 * @constructor
  		 * @param {CKEDITOR.editor} editor
  		 * @param {CKEDITOR.dom.element} parentElement
  		 * @param {Object} definition Definition of the panel that will be floating.
  		 * @param {Number} level
  		 */
  		$: function( editor, parentElement, definition, level ) {
  			definition.forceIFrame = 1;
  
  			// In case of editor with floating toolbar append panels that should float
  			// to the main UI element.
  			if ( definition.toolbarRelated && editor.elementMode == CKEDITOR.ELEMENT_MODE_INLINE )
  				parentElement = CKEDITOR.document.getById( 'cke_' + editor.name );
  
  			var doc = parentElement.getDocument(),
  				panel = getPanel( editor, doc, parentElement, definition, level || 0 ),
  				element = panel.element,
  				iframe = element.getFirst(),
  				that = this;
  
  			// Disable native browser menu. (http://dev.ckeditor.com/ticket/4825)
  			element.disableContextMenu();
  
  			this.element = element;
  
  			this._ = {
  				editor: editor,
  				// The panel that will be floating.
  				panel: panel,
  				parentElement: parentElement,
  				definition: definition,
  				document: doc,
  				iframe: iframe,
  				children: [],
  				dir: editor.lang.dir,
  				showBlockParams: null
  			};
  
  			editor.on( 'mode', hide );
  			editor.on( 'resize', hide );
  
  			// When resize of the window is triggered floatpanel should be repositioned according to new dimensions.
  			// http://dev.ckeditor.com/ticket/11724. Fixes issue with undesired panel hiding on Android and iOS.
  			doc.getWindow().on( 'resize', function() {
  				this.reposition();
  			}, this );
  
  			// We need a wrapper because events implementation doesn't allow to attach
  			// one listener more than once for the same event on the same object.
  			// Remember that floatPanel#hide is shared between all instances.
  			function hide() {
  				that.hide();
  			}
  		},
  
  		proto: {
  			/**
  			 * @todo
  			 */
  			addBlock: function( name, block ) {
  				return this._.panel.addBlock( name, block );
  			},
  
  			/**
  			 * @todo
  			 */
  			addListBlock: function( name, multiSelect ) {
  				return this._.panel.addListBlock( name, multiSelect );
  			},
  
  			/**
  			 * @todo
  			 */
  			getBlock: function( name ) {
  				return this._.panel.getBlock( name );
  			},
  
  			/**
  			 * Shows the panel block.
  			 *
  			 * @param {String} name
  			 * @param {CKEDITOR.dom.element} offsetParent Positioned parent.
  			 * @param {Number} corner
  			 *
  			 * * For LTR (left to right) oriented editor:
  			 *      * `1` = top-left
  			 *      * `2` = top-right
  			 *      * `3` = bottom-right
  			 *      * `4` = bottom-left
  			 * * For RTL (right to left):
  			 *      * `1` = top-right
  			 *      * `2` = top-left
  			 *      * `3` = bottom-left
  			 *      * `4` = bottom-right
  			 *
  			 * @param {Number} [offsetX=0]
  			 * @param {Number} [offsetY=0]
  			 * @param {Function} [callback] A callback function executed when block positioning is done.
  			 * @todo what do exactly these params mean (especially corner)?
  			 */
  			showBlock: function( name, offsetParent, corner, offsetX, offsetY, callback ) {
  				var panel = this._.panel,
  					block = panel.showBlock( name );
  
  				this._.showBlockParams = [].slice.call( arguments );
  				this.allowBlur( false );
  
  				// Record from where the focus is when open panel.
  				var editable = this._.editor.editable();
  				this._.returnFocus = editable.hasFocus ? editable : new CKEDITOR.dom.element( CKEDITOR.document.$.activeElement );
  				this._.hideTimeout = 0;
  
  				var element = this.element,
  					iframe = this._.iframe,
  					// Edge prefers iframe's window to the iframe, just like the rest of the browsers (http://dev.ckeditor.com/ticket/13143).
  					focused = CKEDITOR.env.ie && !CKEDITOR.env.edge ? iframe : new CKEDITOR.dom.window( iframe.$.contentWindow ),
  					doc = element.getDocument(),
  					positionedAncestor = this._.parentElement.getPositionedAncestor(),
  					position = offsetParent.getDocumentPosition( doc ),
  					positionedAncestorPosition = positionedAncestor ? positionedAncestor.getDocumentPosition( doc ) : { x: 0, y: 0 },
  					rtl = this._.dir == 'rtl',
  					left = position.x + ( offsetX || 0 ) - positionedAncestorPosition.x,
  					top = position.y + ( offsetY || 0 ) - positionedAncestorPosition.y;
  
  				// Floating panels are off by (-1px, 0px) in RTL mode. (http://dev.ckeditor.com/ticket/3438)
  				if ( rtl && ( corner == 1 || corner == 4 ) )
  					left += offsetParent.$.offsetWidth;
  				else if ( !rtl && ( corner == 2 || corner == 3 ) )
  					left += offsetParent.$.offsetWidth - 1;
  
  				if ( corner == 3 || corner == 4 )
  					top += offsetParent.$.offsetHeight - 1;
  
  				// Memorize offsetParent by it's ID.
  				this._.panel._.offsetParentId = offsetParent.getId();
  
  				element.setStyles( {
  					top: top + 'px',
  					left: 0,
  					display: ''
  				} );
  
  				// Don't use display or visibility style because we need to
  				// calculate the rendering layout later and focus the element.
  				element.setOpacity( 0 );
  
  				// To allow the context menu to decrease back their width
  				element.getFirst().removeStyle( 'width' );
  
  				// Report to focus manager.
  				this._.editor.focusManager.add( focused );
  
  				// Configure the IFrame blur event. Do that only once.
  				if ( !this._.blurSet ) {
  
  					// With addEventListener compatible browsers, we must
  					// useCapture when registering the focus/blur events to
  					// guarantee they will be firing in all situations. (http://dev.ckeditor.com/ticket/3068, http://dev.ckeditor.com/ticket/3222 )
  					CKEDITOR.event.useCapture = true;
  
  					focused.on( 'blur', function( ev ) {
  						// As we are using capture to register the listener,
  						// the blur event may get fired even when focusing
  						// inside the window itself, so we must ensure the
  						// target is out of it.
  						if ( !this.allowBlur() || ev.data.getPhase() != CKEDITOR.EVENT_PHASE_AT_TARGET )
  							return;
  
  						if ( this.visible && !this._.activeChild ) {
  							// [iOS] Allow hide to be prevented if touch is bound
  							// to any parent of the iframe blur happens before touch (http://dev.ckeditor.com/ticket/10714).
  							if ( CKEDITOR.env.iOS ) {
  								if ( !this._.hideTimeout )
  									this._.hideTimeout = CKEDITOR.tools.setTimeout( doHide, 0, this );
  							} else {
  								doHide.call( this );
  							}
  						}
  
  						function doHide() {
  							// Panel close is caused by user's navigating away the focus, e.g. click outside the panel.
  							// DO NOT restore focus in this case.
  							delete this._.returnFocus;
  							this.hide();
  						}
  					}, this );
  
  					focused.on( 'focus', function() {
  						this._.focused = true;
  						this.hideChild();
  						this.allowBlur( true );
  					}, this );
  
  					// [iOS] if touch is bound to any parent of the iframe blur
  					// happens twice before touchstart and before touchend (http://dev.ckeditor.com/ticket/10714).
  					if ( CKEDITOR.env.iOS ) {
  						// Prevent false hiding on blur.
  						// We don't need to return focus here because touchend will fire anyway.
  						// If user scrolls and pointer gets out of the panel area touchend will also fire.
  						focused.on( 'touchstart', function() {
  							clearTimeout( this._.hideTimeout );
  						}, this );
  
  						// Set focus back to handle blur and hide panel when needed.
  						focused.on( 'touchend', function() {
  							this._.hideTimeout = 0;
  							this.focus();
  						}, this );
  					}
  
  					CKEDITOR.event.useCapture = false;
  
  					this._.blurSet = 1;
  				}
  
  				panel.onEscape = CKEDITOR.tools.bind( function( keystroke ) {
  					if ( this.onEscape && this.onEscape( keystroke ) === false )
  						return false;
  				}, this );
  
  				CKEDITOR.tools.setTimeout( function() {
  					var panelLoad = CKEDITOR.tools.bind( function() {
  						var target = element;
  
  						// Reset panel width as the new content can be narrower
  						// than the old one. (http://dev.ckeditor.com/ticket/9355)
  						target.removeStyle( 'width' );
  
  						if ( block.autoSize ) {
  							var panelDoc = block.element.getDocument(),
  								width = ( ( CKEDITOR.env.webkit || CKEDITOR.env.edge ) ? block.element : panelDoc.getBody() ).$.scrollWidth;
  
  							// Account for extra height needed due to IE quirks box model bug:
  							// http://en.wikipedia.org/wiki/Internet_Explorer_box_model_bug
  							// (http://dev.ckeditor.com/ticket/3426)
  							if ( CKEDITOR.env.ie && CKEDITOR.env.quirks && width > 0 )
  								width += ( target.$.offsetWidth || 0 ) - ( target.$.clientWidth || 0 ) + 3;
  
  							// Add some extra pixels to improve the appearance.
  							width += 10;
  
  							target.setStyle( 'width', width + 'px' );
  
  							var height = block.element.$.scrollHeight;
  
  							// Account for extra height needed due to IE quirks box model bug:
  							// http://en.wikipedia.org/wiki/Internet_Explorer_box_model_bug
  							// (http://dev.ckeditor.com/ticket/3426)
  							if ( CKEDITOR.env.ie && CKEDITOR.env.quirks && height > 0 )
  								height += ( target.$.offsetHeight || 0 ) - ( target.$.clientHeight || 0 ) + 3;
  
  							target.setStyle( 'height', height + 'px' );
  
  							// Fix IE < 8 visibility.
  							panel._.currentBlock.element.setStyle( 'display', 'none' ).removeStyle( 'display' );
  						} else {
  							target.removeStyle( 'height' );
  						}
  
  						// Flip panel layout horizontally in RTL with known width.
  						if ( rtl )
  							left -= element.$.offsetWidth;
  
  						// Pop the style now for measurement.
  						element.setStyle( 'left', left + 'px' );
  
  						/* panel layout smartly fit the viewport size. */
  						var panelElement = panel.element,
  							panelWindow = panelElement.getWindow(),
  							rect = element.$.getBoundingClientRect(),
  							viewportSize = panelWindow.getViewPaneSize();
  
  						// Compensation for browsers that dont support "width" and "height".
  						var rectWidth = rect.width || rect.right - rect.left,
  							rectHeight = rect.height || rect.bottom - rect.top;
  
  						// Check if default horizontal layout is impossible.
  						var spaceAfter = rtl ? rect.right : viewportSize.width - rect.left,
  							spaceBefore = rtl ? viewportSize.width - rect.right : rect.left;
  
  						if ( rtl ) {
  							if ( spaceAfter < rectWidth ) {
  								// Flip to show on right.
  								if ( spaceBefore > rectWidth )
  									left += rectWidth;
  								// Align to window left.
  								else if ( viewportSize.width > rectWidth )
  									left = left - rect.left;
  								// Align to window right, never cutting the panel at right.
  								else
  									left = left - rect.right + viewportSize.width;
  							}
  						} else if ( spaceAfter < rectWidth ) {
  							// Flip to show on left.
  							if ( spaceBefore > rectWidth )
  								left -= rectWidth;
  							// Align to window right.
  							else if ( viewportSize.width > rectWidth )
  								left = left - rect.right + viewportSize.width;
  							// Align to window left, never cutting the panel at left.
  							else
  								left = left - rect.left;
  						}
  
  
  						// Check if the default vertical layout is possible.
  						var spaceBelow = viewportSize.height - rect.top,
  							spaceAbove = rect.top;
  
  						if ( spaceBelow < rectHeight ) {
  							// Flip to show above.
  							if ( spaceAbove > rectHeight )
  								top -= rectHeight;
  							// Align to window bottom.
  							else if ( viewportSize.height > rectHeight )
  								top = top - rect.bottom + viewportSize.height;
  							// Align to top, never cutting the panel at top.
  							else
  								top = top - rect.top;
  						}
  
  						// If IE is in RTL, we have troubles with absolute
  						// position and horizontal scrolls. Here we have a
  						// series of hacks to workaround it. (http://dev.ckeditor.com/ticket/6146)
  						if ( CKEDITOR.env.ie ) {
  							var offsetParent = new CKEDITOR.dom.element( element.$.offsetParent ),
  								scrollParent = offsetParent;
  
  							// Quirks returns <body>, but standards returns <html>.
  							if ( scrollParent.getName() == 'html' )
  								scrollParent = scrollParent.getDocument().getBody();
  
  							if ( scrollParent.getComputedStyle( 'direction' ) == 'rtl' ) {
  								// For IE8, there is not much logic on this, but it works.
  								if ( CKEDITOR.env.ie8Compat )
  									left -= element.getDocument().getDocumentElement().$.scrollLeft * 2;
  								else
  									left -= ( offsetParent.$.scrollWidth - offsetParent.$.clientWidth );
  							}
  						}
  
  						// Trigger the onHide event of the previously active panel to prevent
  						// incorrect styles from being applied (http://dev.ckeditor.com/ticket/6170)
  						var innerElement = element.getFirst(),
  							activePanel;
  						if ( ( activePanel = innerElement.getCustomData( 'activePanel' ) ) )
  							activePanel.onHide && activePanel.onHide.call( this, 1 );
  						innerElement.setCustomData( 'activePanel', this );
  
  						element.setStyles( {
  							top: top + 'px',
  							left: left + 'px'
  						} );
  						element.setOpacity( 1 );
  
  						callback && callback();
  					}, this );
  
  					panel.isLoaded ? panelLoad() : panel.onLoad = panelLoad;
  
  					CKEDITOR.tools.setTimeout( function() {
  						var scrollTop = CKEDITOR.env.webkit && CKEDITOR.document.getWindow().getScrollPosition().y;
  
  						// Focus the panel frame first, so blur gets fired.
  						this.focus();
  
  						// Focus the block now.
  						block.element.focus();
  
  						// http://dev.ckeditor.com/ticket/10623, http://dev.ckeditor.com/ticket/10951 - restore the viewport's scroll position after focusing list element.
  						if ( CKEDITOR.env.webkit )
  							CKEDITOR.document.getBody().$.scrollTop = scrollTop;
  
  						// We need this get fired manually because of unfired focus() function.
  						this.allowBlur( true );
  
  						// Ensure that the first item is focused (http://dev.ckeditor.com/ticket/16804).
  						if ( CKEDITOR.env.ie ) {
  							CKEDITOR.tools.setTimeout( function() {
  								block.markFirstDisplayed ? block.markFirstDisplayed() : block._.markFirstDisplayed();
  							}, 0 );
  						} else {
  							block.markFirstDisplayed ? block.markFirstDisplayed() : block._.markFirstDisplayed();
  						}
  
  						this._.editor.fire( 'panelShow', this );
  					}, 0, this );
  				}, CKEDITOR.env.air ? 200 : 0, this );
  				this.visible = 1;
  
  				if ( this.onShow )
  					this.onShow.call( this );
  			},
  
  			/**
  			 * Repositions the panel with the same parameters that were used in the last {@link #showBlock} call.
  			 *
  			 * @since 4.5.4
  			 */
  			reposition: function() {
  				var blockParams = this._.showBlockParams;
  
  				if ( this.visible && this._.showBlockParams ) {
  					this.hide();
  					this.showBlock.apply( this, blockParams );
  				}
  			},
  
  			/**
  			 * Restores the last focused element or simply focuses the panel window.
  			 */
  			focus: function() {
  				// Webkit requires to blur any previous focused page element, in
  				// order to properly fire the "focus" event.
  				if ( CKEDITOR.env.webkit ) {
  					var active = CKEDITOR.document.getActive();
  					active && !active.equals( this._.iframe ) && active.$.blur();
  				}
  
  				// Restore last focused element or simply focus panel window.
  				var focus = this._.lastFocused || this._.iframe.getFrameDocument().getWindow();
  				focus.focus();
  			},
  
  			/**
  			 * @todo
  			 */
  			blur: function() {
  				var doc = this._.iframe.getFrameDocument(),
  					active = doc.getActive();
  
  				active && active.is( 'a' ) && ( this._.lastFocused = active );
  			},
  
  			/**
  			 * Hides the panel.
  			 *
  			 * @todo
  			 */
  			hide: function( returnFocus ) {
  				if ( this.visible && ( !this.onHide || this.onHide.call( this ) !== true ) ) {
  					this.hideChild();
  					// Blur previously focused element. (http://dev.ckeditor.com/ticket/6671)
  					CKEDITOR.env.gecko && this._.iframe.getFrameDocument().$.activeElement.blur();
  					this.element.setStyle( 'display', 'none' );
  					this.visible = 0;
  					this.element.getFirst().removeCustomData( 'activePanel' );
  
  					// Return focus properly. (http://dev.ckeditor.com/ticket/6247)
  					var focusReturn = returnFocus && this._.returnFocus;
  					if ( focusReturn ) {
  						// Webkit requires focus moved out panel iframe first.
  						if ( CKEDITOR.env.webkit && focusReturn.type )
  							focusReturn.getWindow().$.focus();
  
  						focusReturn.focus();
  					}
  
  					delete this._.lastFocused;
  					this._.showBlockParams = null;
  
  					this._.editor.fire( 'panelHide', this );
  				}
  			},
  
  			/**
  			 * @todo
  			 */
  			allowBlur: function( allow ) {
  				// Prevent editor from hiding the panel. (http://dev.ckeditor.com/ticket/3222)
  				var panel = this._.panel;
  				if ( allow !== undefined )
  					panel.allowBlur = allow;
  
  				return panel.allowBlur;
  			},
  
  			/**
  			 * Shows the specified panel as a child of one block of this one.
  			 *
  			 * @param {CKEDITOR.ui.floatPanel} panel
  			 * @param {String} blockName
  			 * @param {CKEDITOR.dom.element} offsetParent Positioned parent.
  			 * @param {Number} corner
  			 *
  			 * * For LTR (left to right) oriented editor:
  			 *      * `1` = top-left
  			 *      * `2` = top-right
  			 *      * `3` = bottom-right
  			 *      * `4` = bottom-left
  			 * * For RTL (right to left):
  			 *      * `1` = top-right
  			 *      * `2` = top-left
  			 *      * `3` = bottom-left
  			 *      * `4` = bottom-right
  			 *
  			 * @param {Number} [offsetX=0]
  			 * @param {Number} [offsetY=0]
  			 * @todo
  			 */
  			showAsChild: function( panel, blockName, offsetParent, corner, offsetX, offsetY ) {
  				// Skip reshowing of child which is already visible.
  				if ( this._.activeChild == panel && panel._.panel._.offsetParentId == offsetParent.getId() )
  					return;
  
  				this.hideChild();
  
  				panel.onHide = CKEDITOR.tools.bind( function() {
  					// Use a timeout, so we give time for this menu to get
  					// potentially focused.
  					CKEDITOR.tools.setTimeout( function() {
  						if ( !this._.focused )
  							this.hide();
  					}, 0, this );
  				}, this );
  
  				this._.activeChild = panel;
  				this._.focused = false;
  
  				panel.showBlock( blockName, offsetParent, corner, offsetX, offsetY );
  				this.blur();
  
  				/* http://dev.ckeditor.com/ticket/3767 IE: Second level menu may not have borders */
  				if ( CKEDITOR.env.ie7Compat || CKEDITOR.env.ie6Compat ) {
  					setTimeout( function() {
  						panel.element.getChild( 0 ).$.style.cssText += '';
  					}, 100 );
  				}
  			},
  
  			/**
  			 * @todo
  			 */
  			hideChild: function( restoreFocus ) {
  				var activeChild = this._.activeChild;
  
  				if ( activeChild ) {
  					delete activeChild.onHide;
  					delete this._.activeChild;
  					activeChild.hide();
  
  					// At this point focus should be moved back to parent panel.
  					restoreFocus && this.focus();
  				}
  			}
  		}
  	} );
  
  	CKEDITOR.on( 'instanceDestroyed', function() {
  		var isLastInstance = CKEDITOR.tools.isEmpty( CKEDITOR.instances );
  
  		for ( var i in panels ) {
  			var panel = panels[ i ];
  			// Safe to destroy it since there're no more instances.(http://dev.ckeditor.com/ticket/4241)
  			if ( isLastInstance )
  				panel.destroy();
  			// Panel might be used by other instances, just hide them.(http://dev.ckeditor.com/ticket/4552)
  			else
  				panel.element.hide();
  		}
  		// Remove the registration.
  		isLastInstance && ( panels = {} );
  
  	} );
  } )();
  