Experemental Plain2Html/Html2Plain convertor (+ jQuery linkify)

rainloop/v/0.0.0/static/ckeditor/plugins/plain/plugin.js

@@ -5,8 +5,6 @@
 
 		$div = $('<div></div>'),
 
-		trim = $.trim,
-
 		/**
 		 * @param {string} sHtml
 		 * @return {string}
@@ -14,40 +12,69 @@
 		htmlToPlain = function (sHtml)
 		{
 			var
+				iPos = 0,
+				iP1 = 0,
+				iP2 = 0,
+				iP3 = 0,
+				iLimit = 0,
+
 				sText = '',
-				sQuoteChar = '> ',
 
-				convertBlockquote = function () {
-					if (arguments && 1 < arguments.length)
+				splitPlainText = function (sText)
+				{
+					var
+						iLen = 100,
+						sPrefix = '',
+						sSubText = '',
+						sResult = sText,
+						iSpacePos = 0,
+						iNewLinePos = 0
+					;
+
+					while (sResult.length > iLen)
 					{
-						var
-							sText = trim(arguments[1])
-								.replace(/__bq__start__([\s\S\n\r]*)__bq__end__/gm, convertBlockquote)
-						;
+						sSubText = sResult.substring(0, iLen);
+						iSpacePos = sSubText.lastIndexOf(' ');
+						iNewLinePos = sSubText.lastIndexOf('\n');
 
-						sText = '\n' + sQuoteChar + trim(sText).replace(/\n/gm, '\n' + sQuoteChar) + '\n>\n';
+						if (-1 !== iNewLinePos)
+						{
+							iSpacePos = iNewLinePos;
+						}
 
-						return sText.replace(/\n([> ]+)/gm, function () {
-							return (arguments && 1 < arguments.length) ? '\n' + trim(arguments[1].replace(/[\s]/, '')) + ' ' : '';
-						});
+						if (-1 === iSpacePos)
+						{
+							iSpacePos = iLen;
+						}
+
+						sPrefix += sSubText.substring(0, iSpacePos) + '\n';
+						sResult = sResult.substring(iSpacePos + 1);
 					}
 
-					return '';
+					return sPrefix + sResult;
+				},
+
+				convertBlockquote = function (sText) {
+					sText = splitPlainText($.trim(sText));
+					sText = '> ' + sText.replace(/\n/gm, '\n> ');
+					return sText.replace(/(^|\n)([> ]+)/gm, function () {
+						return (arguments && 2 < arguments.length) ? arguments[1] + $.trim(arguments[2].replace(/[\s]/, '')) + ' ' : '';
+					});
 				},
 
 				convertDivs = function () {
 					if (arguments && 1 < arguments.length)
 					{
-						var sText = trim(arguments[1]);
+						var sText = $.trim(arguments[1]);
 						if (0 < sText.length)
 						{
 							sText = sText.replace(/<div[^>]*>([\s\S\r\n]*)<\/div>/gmi, convertDivs);
-							sText = '\n' + trim(sText) + '\n';
+							sText = '\n' + $.trim(sText) + '\n';
 						}
-						
+
 						return sText;
 					}
-					
+
 					return '';
 				},
 
@@ -57,7 +84,7 @@
 				},
 
 				convertLinks = function () {
-					return (arguments && 1 < arguments.length) ? trim(arguments[1]) : '';
+					return (arguments && 1 < arguments.length) ? $.trim(arguments[1]) : '';
 				}
 			;
 
@@ -76,22 +103,63 @@
 				.replace(/<blockquote[^>]*>/gmi, '\n__bq__start__\n')
 				.replace(/<\/blockquote>/gmi, '\n__bq__end__\n')
 				.replace(/<a [^>]*>([\s\S\r\n]*?)<\/a>/gmi, convertLinks)
+				.replace(/<\/div>/gi, '\n')
 				.replace(/&nbsp;/gi, ' ')
-				.replace(/&gt;/gi, '>')
-				.replace(/&lt;/gi, '<')
+				.replace(/&quot;/gi, '"')
 				.replace(/&amp;/gi, '&')
 				.replace(/<[^>]*>/gm, '')
 			;
 
+			sText = $div.html(sText).text();
+
 			sText = sText
 				.replace(/\n[ \t]+/gm, '\n')
 				.replace(/[\n]{3,}/gm, '\n\n')
-				.replace(/__bq__start__([\s\S\r\n]*)__bq__end__/gm, convertBlockquote)
+				.replace(/&gt;/gi, '>')
+				.replace(/&lt;/gi, '<')
+			;
+
+			iPos = 0;
+			iLimit = 100;
+
+			while (0 < iLimit)
+			{
+				iLimit--;
+				iP1 = sText.indexOf('__bq__start__', iPos);
+				if (-1 < iP1)
+				{
+					iP2 = sText.indexOf('__bq__start__', iP1 + 5);
+					iP3 = sText.indexOf('__bq__end__', iP1 + 5);
+
+					if ((-1 === iP2 || iP3 < iP2) && iP1 < iP3)
+					{
+						sText = sText.substring(0, iP1) +
+							convertBlockquote(sText.substring(iP1 + 13, iP3)) +
+							sText.substring(iP3 + 11);
+
+						iPos = 0;
+					}
+					else if (-1 < iP2 && iP2 < iP3)
+					{
+						iPos = iP2 - 1;
+					}
+					else
+					{
+						iPos = 0;
+					}
+				}
+				else
+				{
+					break;
+				}
+			}
+
+			sText = sText
 				.replace(/__bq__start__/gm, '')
 				.replace(/__bq__end__/gm, '')
 			;
 
-			return $div.html(sText).text();
+			return sText;
 		},
 
 		/**
@@ -100,9 +168,77 @@
 		 */
 		plainToHtml = function (sPlain)
 		{
-			return sPlain.toString()
-				.replace(/&/g, '&amp;').replace(/>/g, '&gt;').replace(/</g, '&lt;')
-				.replace(/\r/g, '').replace(/\n/g, '<br />');
+			sPlain = sPlain.toString().replace(/\r/g, '');
+
+			var
+				bIn = false,
+				bDo = true,
+				bStart = true,
+				aNextText = [],
+				sLine = '',
+				iIndex = 0,
+				aText = sPlain.split("\n")
+			;
+
+			do
+			{
+				bDo = false;
+				aNextText = [];
+				for (iIndex = 0; iIndex < aText.length; iIndex++)
+				{
+					sLine = aText[iIndex];
+					bStart = '>' === sLine.substr(0, 1);
+					if (bStart && !bIn)
+					{
+						bDo = true;
+						bIn = true;
+						aNextText.push('~~~blockquote~~~');
+						aNextText.push(sLine.substr(1));
+					}
+					else if (!bStart && bIn)
+					{
+						bIn = false;
+						aNextText.push('~~~/blockquote~~~');
+						aNextText.push(sLine);
+					}
+					else if (bStart && bIn)
+					{
+						aNextText.push(sLine.substr(1));
+					}
+					else
+					{
+						aNextText.push(sLine);
+					}
+				}
+
+				if (bIn)
+				{
+					bIn = false;
+					aNextText.push('~~~/blockquote~~~');
+				}
+
+				aText = aNextText;
+			}
+			while (bDo);
+
+			sPlain = aText.join("\n");
+
+			sPlain = sPlain
+				.replace(/&/g, '&amp;')
+				.replace(/>/g, '&gt;').replace(/</g, '&lt;')
+				.replace(/~~~blockquote~~~[\s]*/g, '<blockquote>')
+				.replace(/[\s]*~~~\/blockquote~~~/g, '</blockquote>')
+				.replace(/[\-_~]{10,}/g, '<hr />')
+				.replace(/\n/g, '<br />');
+
+			if ($.fn && $.fn.linkify)
+			{
+				sPlain = $div.html(sPlain)
+					.linkify().find('.linkified').removeClass('linkified').end()
+					.html();
+			}
+
+			return sPlain;
 		}
 	;
 
@@ -226,7 +362,7 @@ CKEDITOR.plugins.plain = {
 				if (editor.mode === 'wysiwyg') {
 					editor.fire('saveSnapshot');
 				}
-				
+
 				editor.getCommand('plain').setState(CKEDITOR.TRISTATE_DISABLED);
 				editor.setMode(editor.mode === 'plain' ? 'wysiwyg' : 'plain');
 			},