How to Integrate CKEditor with ASP.NET

/*
Copyright (c) 2003-2012, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/

CKEDITOR.dialog.add( 'docProps', function( editor )
{
	var lang = editor.lang.docprops,
		langCommon = editor.lang.common,
		metaHash = {};

	function getDialogValue( dialogName, callback )
	{
		var onOk = function()
		{
			releaseHandlers( this );
			callback( this, this._.parentDialog );
		};
		var releaseHandlers = function( dialog )
		{
			dialog.removeListener( 'ok', onOk );
			dialog.removeListener( 'cancel', releaseHandlers );
		};
		var bindToDialog = function( dialog )
		{
			dialog.on( 'ok', onOk );
			dialog.on( 'cancel', releaseHandlers );
		};
		editor.execCommand( dialogName );
		if ( editor._.storedDialogs.colordialog )
			bindToDialog( editor._.storedDialogs.colordialog );
		else
		{
			CKEDITOR.on( 'dialogDefinition', function( e )
			{
				if ( e.data.name != dialogName )
					return;

				var definition = e.data.definition;

				e.removeListener();
				definition.onLoad = CKEDITOR.tools.override( definition.onLoad, function( orginal )
				{
					return function()
					{
						bindToDialog( this );
						definition.onLoad = orginal;
						if ( typeof orginal == 'function' )
							orginal.call( this );
					};
				});
			});
		}
	}
	function handleOther()
	{
		var dialog = this.getDialog(),
			other = dialog.getContentElement( 'general', this.id + 'Other' );
		if ( !other )
			return;
		if ( this.getValue() == 'other' )
		{
			other.getInputElement().removeAttribute( 'readOnly' );
			other.focus();
			other.getElement().removeClass( 'cke_disabled' );
		}
		else
		{
			other.getInputElement().setAttribute( 'readOnly', true );
			other.getElement().addClass( 'cke_disabled' );
		}
	}
	function commitMeta( name, isHttp, value )
	{
		return function( doc, html, head )
		{
			var hash = metaHash,
				val = typeof value != 'undefined' ? value : this.getValue();
			if ( !val && ( name in hash ) )
				hash[ name ].remove();
			else if ( val && ( name in hash ) )
				hash[ name ].setAttribute( 'content', val );
			else if ( val )
			{
				var meta = new CKEDITOR.dom.element( 'meta', editor.document );
				meta.setAttribute( isHttp ? 'http-equiv' : 'name', name );
				meta.setAttribute( 'content', val );
				head.append( meta );
			}
		};
	}
	function setupMeta( name, ret )
	{
		return function()
		{
			var hash = metaHash,
				result = ( name in hash ) ? hash[ name ].getAttribute( 'content' ) || '' : '';
			if ( ret )
				return result;
			this.setValue( result );
			return null;
		};
	}
	function commitMargin( name )
	{
		return function( doc, html, head, body )
		{
			body.removeAttribute( 'margin' + name );
			var val = this.getValue();
			if ( val !== '' )
				body.setStyle( 'margin-' + name, CKEDITOR.tools.cssLength( val ) );
			else
				body.removeStyle( 'margin-' + name );
		};
	}

	function createMetaHash( doc )
	{
		var hash = {},
			metas = doc.getElementsByTag( 'meta' ),
			count = metas.count();

		for ( var i = 0; i < count; i++ )
		{
			var meta = metas.getItem( i );
			hash[ meta.getAttribute( meta.hasAttribute( 'http-equiv' ) ? 'http-equiv' : 'name' ).toLowerCase() ] = meta;
		}
		return hash;
	}
	// We cannot just remove the style from the element, as it might be affected from non-inline stylesheets.
	// To get the proper result, we should manually set the inline style to its default value.
	function resetStyle( element, prop, resetVal )
	{
		element.removeStyle( prop );
		if ( element.getComputedStyle( prop ) != resetVal )
			element.setStyle( prop, resetVal );
	}

	// Utilty to shorten the creation of color fields in the dialog.
	var colorField = function( id, label, fieldProps )
	{
		return {
			type : 'hbox',
			padding : 0,
			widths : [ '60%', '40%' ],
			children : [
				CKEDITOR.tools.extend( {
					type : 'text',
					id : id,
					label : lang[ label ]
				}, fieldProps || {}, 1 ),
				{
					type : 'button',
					id : id + 'Choose',
					label : lang.chooseColor,
					className : 'colorChooser',
					onClick : function()
					{
						var self = this;
						getDialogValue( 'colordialog', function( colorDialog )
						{
							var dialog = self.getDialog();
							dialog.getContentElement( dialog._.currentTabId, id ).setValue( colorDialog.getContentElement( 'picker', 'selectedColor' ).getValue() );
						});
					}
				}
			]
		};
	};
	var previewSrc = 'javascript:' +
		'void((function(){' +
			encodeURIComponent(
				'document.open();' +
				( CKEDITOR.env.isCustomDomain() ? 'document.domain=\'' + document.domain + '\';' : '' ) +
				'document.write( \'<html style="background-color: #ffffff; height: 100%"><head></head><body style="width: 100%; height: 100%; margin: 0px">' + lang.previewHtml + '</body></html>\' );' +
				'document.close();'
			) +
		'})())';

	return {
		title : lang.title,
		minHeight: 330,
		minWidth: 500,
		onShow : function()
		{
			var doc = editor.document,
				html = doc.getElementsByTag( 'html' ).getItem( 0 ),
				head = doc.getHead(),
				body = doc.getBody();
			metaHash = createMetaHash( doc );
			this.setupContent( doc, html, head, body );
		},
		onHide : function()
		{
			metaHash = {};
		},
		onOk : function()
		{
			var doc = editor.document,
				html = doc.getElementsByTag( 'html' ).getItem( 0 ),
				head = doc.getHead(),
				body = doc.getBody();
			this.commitContent( doc, html, head, body );
		},
		contents : [
			{
				id : 'general',
				label : langCommon.generalTab,
				elements : [
					{
						type : 'text',
						id : 'title',
						label : lang.docTitle,
						setup : function( doc )
						{
							this.setValue( doc.getElementsByTag( 'title' ).getItem( 0 ).data( 'cke-title' ) );
						},
						commit : function( doc, html, head, body, isPreview )
						{
							if ( isPreview )
								return;
							doc.getElementsByTag( 'title' ).getItem( 0 ).data( 'cke-title', this.getValue() );
						}
					},
					{
						type : 'hbox',
						children : [
							{
								type : 'select',
								id : 'dir',
								label : langCommon.langDir,
								style : 'width: 100%',
								items : [
									[ langCommon.notSet , '' ],
									[ langCommon.langDirLtr, 'ltr' ],
									[ langCommon.langDirRtl, 'rtl' ]
								],
								setup : function( doc, html, head, body )
								{
									this.setValue( body.getDirection() || '' );
								},
								commit : function( doc, html, head, body )
								{
									var val = this.getValue();
									if ( val )
										body.setAttribute( 'dir', val );
									else
										body.removeAttribute( 'dir' );
									body.removeStyle( 'direction' );
								}
							},
							{
								type : 'text',
								id : 'langCode',
								label : langCommon.langCode,
								setup : function( doc, html )
								{
									this.setValue( html.getAttribute( 'xml:lang' ) || html.getAttribute( 'lang' ) || '' );
								},
								commit : function( doc, html, head, body, isPreview )
								{
									if ( isPreview )
										return;
									var val = this.getValue();
									if ( val )
										html.setAttributes( { 'xml:lang' : val, lang : val } );
									else
										html.removeAttributes( { 'xml:lang' : 1, lang : 1 } );
								}
							}
						]
					},
					{
						type : 'hbox',
						children : [
							{
								type : 'select',
								id : 'charset',
								label : lang.charset,
								style : 'width: 100%',
								items : [
									[ langCommon.notSet, '' ],
									[ lang.charsetASCII, 'us-ascii' ],
									[ lang.charsetCE, 'iso-8859-2' ],
									[ lang.charsetCT, 'big5' ],
									[ lang.charsetCR, 'iso-8859-5' ],
									[ lang.charsetGR, 'iso-8859-7' ],
									[ lang.charsetJP, 'iso-2022-jp' ],
									[ lang.charsetKR, 'iso-2022-kr' ],
									[ lang.charsetTR, 'iso-8859-9' ],
									[ lang.charsetUN, 'utf-8' ],
									[ lang.charsetWE, 'iso-8859-1' ],
									[ lang.other, 'other' ]
								],
								'default' : '',
								onChange : function()
								{
									this.getDialog().selectedCharset = this.getValue() != 'other' ? this.getValue() : '';
									handleOther.call( this );
								},
								setup : function()
								{
									this.metaCharset = ( 'charset' in metaHash );

									var func = setupMeta( this.metaCharset ? 'charset' : 'content-type', 1, 1 ),
										val = func.call( this );

									!this.metaCharset && val.match( /charset=[^=]+$/ ) && ( val = val.substring( val.indexOf( '=' ) + 1 ) );

									if ( val )
									{
										this.setValue( val.toLowerCase() );
										if ( !this.getValue() )
										{
											this.setValue( 'other' );
											var other = this.getDialog().getContentElement( 'general', 'charsetOther' );
											other && other.setValue( val );
										}
										this.getDialog().selectedCharset = val;
									}

									handleOther.call( this );
								},
								commit : function( doc, html, head, body, isPreview )
								{
									if ( isPreview )
										return;
									var value = this.getValue(),
										other = this.getDialog().getContentElement( 'general', 'charsetOther' );

									value == 'other' && ( value = other ? other.getValue() : '' );

									value && !this.metaCharset && ( value = ( metaHash[ 'content-type' ] ? metaHash[ 'content-type' ].getAttribute( 'content' ).split( ';' )[0] : 'text/html' ) + '; charset=' + value );

									var func = commitMeta( this.metaCharset ? 'charset' : 'content-type', 1, value );
									func.call( this, doc, html, head );
								}
							},
							{
								type : 'text',
								id : 'charsetOther',
								label : lang.charsetOther,
								onChange : function(){ this.getDialog().selectedCharset = this.getValue(); }
							}
						]
					},
					{
						type : 'hbox',
						children : [
							{
								type : 'select',
								id : 'docType',
								label : lang.docType,
								style : 'width: 100%',
								items : [
									[ langCommon.notSet , '' ],
									[ 'XHTML 1.1', '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">' ],
									[ 'XHTML 1.0 Transitional', '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">' ],
									[ 'XHTML 1.0 Strict', '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">' ],
									[ 'XHTML 1.0 Frameset', '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">' ],
									[ 'HTML 5', '<!DOCTYPE html>' ],
									[ 'HTML 4.01 Transitional', '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">' ],
									[ 'HTML 4.01 Strict', '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">' ],
									[ 'HTML 4.01 Frameset', '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">' ],
									[ 'HTML 3.2', '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">' ],
									[ 'HTML 2.0', '<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">' ],
									[ lang.other, 'other' ]
								],
								onChange : handleOther,
								setup : function()
								{
									if ( editor.docType )
									{
										this.setValue( editor.docType );
										if ( !this.getValue() )
										{
											this.setValue( 'other' );
											var other = this.getDialog().getContentElement( 'general', 'docTypeOther' );
											other && other.setValue( editor.docType );
										}
									}
									handleOther.call( this );
								},
								commit : function( doc, html, head, body, isPreview )
								{
									if ( isPreview )
										return;
									var value = this.getValue(),
										other = this.getDialog().getContentElement( 'general', 'docTypeOther' );
									editor.docType = value == 'other' ? ( other ? other.getValue() : '' ) : value;
								}
							},
							{
								type : 'text',
								id : 'docTypeOther',
								label : lang.docTypeOther
							}
						]
					},
					{
						type : 'checkbox',
						id : 'xhtmlDec',
						label : lang.xhtmlDec,
						setup : function()
						{
							this.setValue( !!editor.xmlDeclaration );
						},
						commit : function( doc, html, head, body, isPreview )
						{
							if ( isPreview )
								return;
							if ( this.getValue() )
							{
								editor.xmlDeclaration = '<?xml version="1.0" encoding="' + ( this.getDialog().selectedCharset || 'utf-8' )+ '"?>' ;
								html.setAttribute( 'xmlns', 'http://www.w3.org/1999/xhtml' );
							}
							else
							{
								editor.xmlDeclaration = '';
								html.removeAttribute( 'xmlns' );
							}
						}
					}
				]
			},
			{
				id : 'design',
				label : lang.design,
				elements : [
					{
						type : 'hbox',
						widths : [ '60%', '40%' ],
						children : [
							{
								type : 'vbox',
								children : [
									colorField( 'txtColor', 'txtColor',
									{
										setup : function( doc, html, head, body )
										{
											this.setValue( body.getComputedStyle( 'color' ) );
										},
										commit : function( doc, html, head, body, isPreview )
										{
											if ( this.isChanged() || isPreview )
											{
												body.removeAttribute( 'text' );
												var val = this.getValue();
												if ( val )
													body.setStyle( 'color', val );
												else
													body.removeStyle( 'color' );
											}
										}
									}),
									colorField( 'bgColor', 'bgColor', {
										setup : function( doc, html, head, body )
										{
											var val = body.getComputedStyle( 'background-color' ) || '';
											this.setValue( val == 'transparent' ? '' : val );
										},
										commit : function( doc, html, head, body, isPreview )
										{
											if ( this.isChanged() || isPreview )
											{
												body.removeAttribute( 'bgcolor' );
												var val = this.getValue();
												if ( val )
													body.setStyle( 'background-color', val );
												else
													resetStyle( body, 'background-color', 'transparent' );
											}
										}
									}),
									{
										type : 'hbox',
										widths : [ '60%', '40%' ],
										padding : 1,
										children : [
											{
												type : 'text',
												id : 'bgImage',
												label : lang.bgImage,
												setup : function( doc, html, head, body )
												{
													var val = body.getComputedStyle( 'background-image' ) || '';
													if ( val == 'none' )
														val = '';
													else
													{
														val = val.replace( /url\(\s*(["']?)\s*([^\)]*)\s*\1\s*\)/i, function( match, quote, url )
														{
															return url;
														});
													}
													this.setValue( val );
												},
												commit : function( doc, html, head, body )
												{
													body.removeAttribute( 'background' );
													var val = this.getValue();
													if ( val )
														body.setStyle( 'background-image', 'url(' + val + ')' );
													else
														resetStyle( body, 'background-image', 'none' );
												}
											},
											{
												type : 'button',
												id : 'bgImageChoose',
												label : langCommon.browseServer,
												style : 'display:inline-block;margin-top:10px;',
												hidden : true,
												filebrowser : 'design:bgImage'
											}
										]
									},
									{
										type : 'checkbox',
										id : 'bgFixed',
										label : lang.bgFixed,
										setup : function( doc, html, head, body )
										{
											this.setValue( body.getComputedStyle( 'background-attachment' ) == 'fixed' );
										},
										commit : function( doc, html, head, body )
										{
											if ( this.getValue() )
												body.setStyle( 'background-attachment', 'fixed' );
											else
												resetStyle( body, 'background-attachment', 'scroll' );
										}
									}
								]
							},
							{
								type : 'vbox',
								children : [
									{
										type : 'html',
										id : 'marginTitle',
										html : '<div style="text-align: center; margin: 0px auto; font-weight: bold">' + lang.margin + '</div>'
									},
									{
										type : 'text',
										id : 'marginTop',
										label : lang.marginTop,
										style : 'width: 80px; text-align: center',
										align : 'center',
										inputStyle : 'text-align: center',
										setup : function( doc, html, head, body )
										{
											this.setValue( body.getStyle( 'margin-top' ) || body.getAttribute( 'margintop' ) || '' );
										},
										commit : commitMargin( 'top' )
									},
									{
										type : 'hbox',
										children : [
											{
												type : 'text',
												id : 'marginLeft',
												label : lang.marginLeft,
												style : 'width: 80px; text-align: center',
												align : 'center',
												inputStyle : 'text-align: center',
												setup : function( doc, html, head, body )
												{
													this.setValue( body.getStyle( 'margin-left' ) || body.getAttribute( 'marginleft' ) || '' );
												},
												commit : commitMargin( 'left' )
											},
											{
												type : 'text',
												id : 'marginRight',
												label : lang.marginRight,
												style : 'width: 80px; text-align: center',
												align : 'center',
												inputStyle : 'text-align: center',
												setup : function( doc, html, head, body )
												{
													this.setValue( body.getStyle( 'margin-right' ) || body.getAttribute( 'marginright' ) || '' );
												},
												commit : commitMargin( 'right' )
											}
										]
									},
									{
										type : 'text',
										id : 'marginBottom',
										label : lang.marginBottom,
										style : 'width: 80px; text-align: center',
										align : 'center',
										inputStyle : 'text-align: center',
										setup : function( doc, html, head, body )
										{
											this.setValue( body.getStyle( 'margin-bottom' ) || body.getAttribute( 'marginbottom' ) || '' );
										},
										commit : commitMargin( 'bottom' )
									}
								]
							}
						]
					}
				]
			},
			{
				id : 'meta',
				label : lang.meta,
				elements : [
					{
						type : 'textarea',
						id : 'metaKeywords',
						label : lang.metaKeywords,
						setup : setupMeta( 'keywords' ),
						commit : commitMeta( 'keywords' )
					},
					{
						type : 'textarea',
						id : 'metaDescription',
						label : lang.metaDescription,
						setup : setupMeta( 'description' ),
						commit : commitMeta( 'description' )
					},
					{
						type : 'text',
						id : 'metaAuthor',
						label : lang.metaAuthor,
						setup : setupMeta( 'author' ),
						commit : commitMeta( 'author' )
					},
					{
						type : 'text',
						id : 'metaCopyright',
						label : lang.metaCopyright,
						setup : setupMeta( 'copyright' ),
						commit : commitMeta( 'copyright' )
					}
				]
			},
			{
				id : 'preview',
				label : langCommon.preview,
				elements : [
					{
						type : 'html',
						id : 'previewHtml',
						html : '<iframe src="' + previewSrc + '" style="width: 100%; height: 310px" hidefocus="true" frameborder="0" ' +
								'id="cke_docProps_preview_iframe"></iframe>',
						onLoad : function()
						{
							this.getDialog().on( 'selectPage', function( ev )
							{
								if ( ev.data.page == 'preview' )
								{
									var self = this;
									setTimeout( function()
									{
										var doc = CKEDITOR.document.getById( 'cke_docProps_preview_iframe' ).getFrameDocument(),
											html = doc.getElementsByTag( 'html' ).getItem( 0 ),
											head = doc.getHead(),
											body = doc.getBody();
										self.commitContent( doc, html, head, body, 1 );
									}, 50 );
								}
							});
							CKEDITOR.document.getById( 'cke_docProps_preview_iframe' ).getAscendant( 'table' ).setStyle( 'height', '100%' );
						}
					}
				]
			}
		]
	};
});