Implements #36, version bump to 0.13

Adds permalink anchor inside all header HTML tags. Themes are adjusted
to have a 'headerlink' css class to deal with this anchor: it's visible
only when hovered.

Themes/Default/Destination/css/theme.css

@@ -136,6 +136,14 @@ a:hover, a:active {
 	outline: 0;
 }
 
+a.headerlink {
+	display: inline;
+	text-decoration: none;
+	visibility: hidden;
+	font-size: smaller;
+	margin-left: 3px;
+}
+
 abbr[title] {
 	border-bottom: 1px dotted;
 }
@@ -303,6 +311,30 @@ h6 {
 	margin-bottom: 7px;
 }
 
+h1:hover a.headerlink {
+	visibility: visible;
+}
+
+h2:hover a.headerlink {
+	visibility: visible;
+}
+
+h3:hover a.headerlink {
+	visibility: visible;
+}
+
+h4:hover a.headerlink {
+	visibility: visible;
+}
+
+h5:hover a.headerlink {
+	visibility: visible;
+}
+
+h6:hover a.headerlink {
+	visibility: visible;
+}
+
 hr {
 	display: block;
 	height: 1px;

Themes/LLBLGenPro/Destination/css/theme.css

@@ -136,6 +136,14 @@ a:hover, a:active {
 	outline: 0;
 }
 
+a.headerlink {
+	display: inline;
+	text-decoration: none;
+	visibility: hidden;
+	font-size: smaller;
+	margin-left: 3px;
+}
+
 abbr[title] {
 	border-bottom: 1px dotted;
 }
@@ -303,6 +311,30 @@ h6 {
 	margin-bottom: 7px;
 }
 
+h1:hover a.headerlink {
+	visibility: visible;
+}
+
+h2:hover a.headerlink {
+	visibility: visible;
+}
+
+h3:hover a.headerlink {
+	visibility: visible;
+}
+
+h4:hover a.headerlink {
+	visibility: visible;
+}
+
+h5:hover a.headerlink {
+	visibility: visible;
+}
+
+h6:hover a.headerlink {
+	visibility: visible;
+}
+
 hr {
 	display: block;
 	height: 1px;

src/DocNet/Properties/AssemblyInfo.cs

@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("0.12.0.0")]
-[assembly: AssemblyFileVersion("0.12.0")]
+[assembly: AssemblyVersion("0.13.0.0")]
+[assembly: AssemblyFileVersion("0.13.0")]

src/MarkdownDeep/Block.cs

@@ -172,6 +172,7 @@ namespace MarkdownDeep
 				case BlockType.h5:
 				case BlockType.h6:
 					string id = string.Empty;
+					bool insertPermalink = false;
 					if (m.ExtraMode && !m.SafeMode)
 					{
 						b.Append("<" + BlockType.ToString());
@@ -181,6 +182,7 @@ namespace MarkdownDeep
 							b.Append(" id=\"");
 							b.Append(id);
 							b.Append("\">");
+							insertPermalink = true;
 						}
 						else
 						{
@@ -204,6 +206,13 @@ namespace MarkdownDeep
 					{
 						m.SpanFormatter.Format(b, Buf, ContentStart, ContentLen);
 					}
+					if(insertPermalink)
+					{
+						// append header permalink link
+						b.Append("<a class=\"headerlink\" href=\"#");
+						b.Append(id);
+						b.Append("\" title=\"Permalink to this headline\"><i class=\"fa fa-link\" aria-hidden=\"true\"></i></a>");
+					}
 					b.Append("</" + BlockType.ToString() + ">\n");
 					break;