* Fix not parsing css style if contained in html comment

Author: ArthurHub

Source/Demo/Samples/07.Additional features.htm

@@ -3,6 +3,7 @@
     <title>Additional features</title>
     <link rel="Stylesheet" href="StyleSheet" />
     <style>
+        <!--
         .g1, .g2, .g3, .g4, .g5 {
             background-color: red;
             background-gradient: yellow;
@@ -55,6 +56,7 @@
         td {
             text-align: center;
         }
+        -->
     </style>
 </head>
 <body>

Source/HtmlRenderer/Parse/CssParser.cs

@@ -31,6 +31,11 @@ internal static class CssParser
         /// </summary>
         private static readonly char[] _cssBlockSplitters = new[] { '}', ';' };
 
+        /// <summary>
+        /// The chars to trim the css class name by
+        /// </summary>
+        private static readonly char[] _cssClassTrimChars = new[] {'\r', '\n', '\t', ' ', '-', '!', '<', '>'};
+
         #endregion
 
         /// <summary>
@@ -192,7 +197,7 @@ private static void ParseMediaStyleBlocks(CssData cssData, string stylesheet)
             string atrule;
             while ((atrule = RegexParserUtils.GetCssAtRules(stylesheet, ref startIdx)) != null)
             {
-                //Just processs @media rules
+                //Just process @media rules
                 if (!atrule.StartsWith("@media",StringComparison.InvariantCultureIgnoreCase)) continue;
 
                 //Extract specified media types
@@ -245,7 +250,7 @@ private static void FeedStyleBlock(CssData cssData, string block, string media =
 
                 foreach (string cls in classes)
                 {
-                    string className = cls.Trim();
+                    string className = cls.Trim(_cssClassTrimChars);
                     if (!String.IsNullOrEmpty(className))
                     {
                         var newblock = ParseCssBlockImp(className, blockSource);

Source/HtmlRenderer/Parse/DomParser.cs

@@ -106,10 +106,11 @@ private static void CascadeStyles(CssBox box, HtmlContainer htmlContainer, ref C
                 }
 
                 // Check for the <style> tag
-                if (box.HtmlTag.Name.Equals("style", StringComparison.CurrentCultureIgnoreCase) && box.Boxes.Count == 1)
+                if (box.HtmlTag.Name.Equals("style", StringComparison.CurrentCultureIgnoreCase) && box.Boxes.Count > 0)
                 {
                     CloneCssData(ref cssData, ref cssDataChanged);
-                    CssParser.ParseStyleSheet(cssData, box.Boxes[0].Text.CutSubstring());
+                    foreach (var child in box.Boxes)
+                        CssParser.ParseStyleSheet(cssData, child.Text.CutSubstring());
                 }
 
                 // Check for the <link rel=stylesheet> tag

Source/HtmlRenderer/Parse/HtmlParser.cs

@@ -61,13 +61,21 @@ public static CssBox ParseDocument(string source)
                     {
                         // parse element tag to css box structure
                         endIdx = ParseHtmlTag(source, tagIdx, ref curBox) + 1;
+
+                        if( curBox.HtmlTag != null && curBox.HtmlTag.Name.Equals(HtmlConstants.Style, StringComparison.OrdinalIgnoreCase) )
+                        {
+                            var endIdxS = endIdx;
+                            endIdx = source.IndexOf("</style>", endIdx, StringComparison.OrdinalIgnoreCase);
+                            if(endIdx > -1)
+                                AddTextBox(source, endIdxS, endIdx, ref curBox);
+                        }
                     }
                 }
                 startIdx = tagIdx > -1 && endIdx > 0 ? endIdx : -1;
             }
 
-            // handle pices of html without proper structure
-            if (endIdx < source.Length)
+            // handle pieces of html without proper structure
+            if (endIdx > -1 && endIdx < source.Length)
             {
                 // there is text after the end of last element
                 var endText = new SubString(source, endIdx, source.Length - endIdx);