fix(taBind._blankTest): Fix for highly nested content.

Fixes #512

Author: SimeonC

lib/taBind.js

@@ -4,11 +4,20 @@ angular.module('textAngular.taBind', ['textAngular.factories', 'textAngular.DOM'
 	return function(_defaultTest){
 		return function(_blankVal){
 			if(!_blankVal) return true;
-			// Don't do a global replace as that would be waaayy too long, just replace the first 4 occurences should be enough
-			_blankVal = _blankVal.toString().replace(/="[^"]*"/i, '').replace(/="[^"]*"/i, '').replace(/="[^"]*"/i, '').replace(/="[^"]*"/i, '');
-			var _firstTagIndex = _blankVal.indexOf('>');
-			if(_firstTagIndex === -1) return _blankVal.trim().length === 0;
+			// find first non-tag match - ie start of string or after tag that is not whitespace
+			var _firstMatch = /(^[^<]|>)[^<]/i.exec(_blankVal);
+			var _firstTagIndex;
+			if(!_firstMatch){
+				// find the end of the first tag removing all the 
+				// Don't do a global replace as that would be waaayy too long, just replace the first 4 occurences should be enough
+				_blankVal = _blankVal.toString().replace(/="[^"]*"/i, '').replace(/="[^"]*"/i, '').replace(/="[^"]*"/i, '').replace(/="[^"]*"/i, '');
+				_firstTagIndex = _blankVal.indexOf('>');
+			}else{
+				_firstTagIndex = _firstMatch.index;
+			}
 			_blankVal = _blankVal.trim().substring(_firstTagIndex, _firstTagIndex + 100);
+			// check for no tags entry
+			if(/^[^<>]+$/i.test(_blankVal)) return false;
 			// this regex is to match any number of whitespace only between two tags
 			if (_blankVal.length === 0 || _blankVal === _defaultTest || /^>(\s|&nbsp;)*<\/[^>]+>$/ig.test(_blankVal)) return true;
 			// this regex tests if there is a tag followed by some optional whitespace and some text after that

test/taBind/taBind._taBlankTest.spec.js

@@ -24,7 +24,26 @@ describe('taBind._taBlankTest', function () {
 				'<p>Test Some<br></p>',
 				'Some Test',
 				'<p><img class="ta-insert-video" src="https://img.youtube.com/vi/sbQQKI1Fwo4/hqdefault.jpg" ta-insert-video="https://www.youtube.com/embed/sbQQKI1Fwo4" contenteditable="false" allowfullscreen="true" frameborder="0"><br></p>',
-				'<p></p><p style="color: rgb(68, 68, 68);text-align: left;background-color: rgb(255, 255, 255);"><u><b>ATTITUDES:</b></u></p>'
+				'<p></p><p style="color: rgb(68, 68, 68);text-align: left;background-color: rgb(255, 255, 255);"><u><b>ATTITUDES:</b></u></p>',
+				'<div class="AppContainer" style="width: 1280px;color: rgb(0, 0, 0);">' + // a real world case from #512
+    '<div id="c_base" class="c_base">' +
+        '<div id="c_content" class="c_main">' +
+            '<div id="pageContent">' +
+                '<div id="pageInbox" class="v-Page">' +
+                    '<div id="inboxControl0f">' +
+                        '<div class="containsYSizerBar" style="height: 849px;width: 1280px;">' +
+                            '<div class="ContentRight WithRightRail FullView">' +
+                                '<div class="ContentRightInner t_mbgc t_qtc t_urtc" style="color: rgb(68, 68, 68);background-color: rgb(255, 255, 255);">' +
+                                    '<div id="inboxControl0fv-ReadMessageContainer" class="v-ReadMessageContainer slideOnResize">' +
+                                        '<div class="c-ReadMessage" style="height: 818.03125px;width: 895px;">' +
+                                            '<div class="rmMessages ClearBoth" id="ReadMessageScrollableSection">' +
+                                                '<div id="readMessagePartControl1604f" class="c-ReadMessagePart ReadMsgContainer HasLayout ClearBoth HideShadows FullPart NoHistory Read RmIc">' +
+                                                    '<div class="c-ReadMessagePartBody">' +
+                                                        '<div class="readMsgBody">' +
+                                                            '<div id="bodyreadMessagePartBodyControl1609f" class="ExternalClass MsgBodyContainer">' +
+                                                                '<p><u><b>Lorem ipsum</b></u></p>' +
+                                                                '<p><b>Lorem ipsum</b></p>' +
+				'</div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>'
 			],
 			testString(false)
 		);