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lib/ckeditor4/plugins/insertpre/README.md

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+CKEditor Insert <pre> Plugin
+===============================
+
+This plugin makes it easier to insert a <pre> tag in CKEditor.
+
+Installation
+------------
+
+1. Clone/copy this repository contents in a new "plugins/insertpre" folder in your CKEditor installation.
+2. Enable the "insertpre" plugin in the CKEditor configuration file (config.js):
+
+        config.extraPlugins = 'insertpre';
+
+That's all. "InsertPre" button will appear on the editor toolbar and will be ready to use.
+
+3. Optionally, you may specify which class should be added to the <pre> element:
+
+        CKEDITOR.config.insertpre_class = 'prettyprint';
+
+   As well as specify how the <pre> tag should be rendered inside CKEditor:
+
+		CKEDITOR.config.insertpre_style = 'background-color:#F8F8F8;border:1px solid #DDD;padding:10px;';
+
+License
+-------
+
+Licensed under the terms of any of the following licenses at your choice: [GPL](http://www.gnu.org/licenses/gpl.html), [LGPL](http://www.gnu.org/licenses/lgpl.html) and [MPL](http://www.mozilla.org/MPL/MPL-1.1.html).

lib/ckeditor4/plugins/insertpre/lang/en.js

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+CKEDITOR.plugins.setLang( 'insertpre', 'en', {
+	title : 'Insert code snippet',
+	code : 'Code',
+	edit : 'Edit code',
+	notEmpty : 'The code field cannot be empty.'
+});

lib/ckeditor4/plugins/insertpre/lang/pl.js

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+CKEDITOR.plugins.setLang( 'insertpre', 'pl', {
+	title : 'Wstaw kod',
+	code : 'Kod',
+	edit : 'Edytuj',
+	notEmpty: 'Pole z kodem nie może być puste.'
+});

lib/ckeditor4/plugins/insertpre/plugin.js

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+/*
+ Copyright (c) 2003-2012, CKSource - Frederico Knabben. All rights reserved.
+ For licensing, see LICENSE.html or http://ckeditor.com/license
+ */
+
+CKEDITOR.plugins.add( 'insertpre',
+	{
+		requires: 'dialog',
+		lang : 'en,pl', // %REMOVE_LINE_CORE%
+		icons: 'insertpre', // %REMOVE_LINE_CORE%
+		onLoad : function()
+		{
+			if ( CKEDITOR.config.insertpre_class )
+			{
+				CKEDITOR.addCss(
+					'pre.' + CKEDITOR.config.insertpre_class + ' {' +
+						CKEDITOR.config.insertpre_style +
+						'}'
+				);
+			}
+		},
+		init : function( editor )
+		{
+			// allowed and required content is the same for this plugin
+			var required = CKEDITOR.config.insertpre_class ? ( 'pre( ' + CKEDITOR.config.insertpre_class + ' )' ) : 'pre';
+			editor.addCommand( 'insertpre', new CKEDITOR.dialogCommand( 'insertpre', {
+				allowedContent : required,
+				requiredContent : required
+			} ) );
+			editor.ui.addButton && editor.ui.addButton( 'InsertPre',
+				{
+					label : editor.lang.insertpre.title,
+					icon : this.path + 'icons/insertpre.png',
+					command : 'insertpre',
+					toolbar: 'insert,99'
+				} );
+
+			if ( editor.contextMenu )
+			{
+				editor.addMenuGroup( 'code' );
+				editor.addMenuItem( 'insertpre',
+					{
+						label : editor.lang.insertpre.edit,
+						icon : this.path + 'icons/insertpre.png',
+						command : 'insertpre',
+						group : 'code'
+					});
+				editor.contextMenu.addListener( function( element )
+				{
+					if ( element )
+						element = element.getAscendant( 'pre', true );
+					if ( element && !element.isReadOnly() && element.hasClass( editor.config.insertpre_class ) )
+						return { insertpre : CKEDITOR.TRISTATE_OFF };
+					return null;
+				});
+			}
+
+			CKEDITOR.dialog.add( 'insertpre', function( editor )
+			{
+				return {
+					title : editor.lang.insertpre.title,
+					minWidth : 540,
+					minHeight : 380,
+					contents : [
+						{
+							id : 'general',
+							label : editor.lang.insertpre.code,
+							elements : [
+								{
+									type : 'textarea',
+									id : 'contents',
+									label : editor.lang.insertpre.code,
+									cols: 140,
+									rows: 22,
+									validate : CKEDITOR.dialog.validate.notEmpty( editor.lang.insertpre.notEmpty ),
+									required : true,
+									setup : function( element )
+									{
+										var html = element.getHtml();
+										if ( html )
+										{
+											var div = document.createElement( 'div' );
+											div.innerHTML = html;
+											this.setValue( div.firstChild.nodeValue );
+										}
+									},
+									commit : function( element )
+									{
+										element.setHtml( CKEDITOR.tools.htmlEncode( this.getValue() ) );
+									}
+								}
+							]
+						}
+					],
+					onShow : function()
+					{
+						var sel = editor.getSelection(),
+							element = sel.getStartElement();
+						if ( element )
+							element = element.getAscendant( 'pre', true );
+
+						if ( !element || element.getName() != 'pre' || !element.hasClass( editor.config.insertpre_class ) )
+						{
+							element = editor.document.createElement( 'pre' );
+							this.insertMode = true;
+						}
+						else
+							this.insertMode = false;
+
+						this.pre = element;
+						this.setupContent( this.pre );
+					},
+					onOk : function()
+					{
+						if ( editor.config.insertpre_class )
+							this.pre.setAttribute( 'class', editor.config.insertpre_class );
+
+						if ( this.insertMode )
+							editor.insertElement( this.pre );
+
+						this.commitContent( this.pre );
+					}
+				};
+			} );
+		}
+	} );
+
+if (typeof(CKEDITOR.config.insertpre_style) == 'undefined')
+	CKEDITOR.config.insertpre_style = 'background-color:#F8F8F8;border:1px solid #DDD;padding:10px;';
+if (typeof(CKEDITOR.config.insertpre_class)  == 'undefined')
+	CKEDITOR.config.insertpre_class = 'prettyprint';