Bump to 0.6.2

Fix typo in MarkdownExtensions.cs

readme.md

@@ -10,12 +10,13 @@ You can **try Markdig online** and compare it to other implementations on [babel
 
 ## Features
 
-- **Very fast parser** (no-regexp), very lightweight in terms of GC pressure. See benchmarks
-- **Abstract Syntax Tree**
+- **Very fast parser and html renderer** (no-regexp), very lightweight in terms of GC pressure. See benchmarks
+- **Abstract Syntax Tree** with precise source code location for syntax tree, useful when building a Markdown editor.
+  - Checkout [MarkdownEditor for Visual Studio](https://visualstudiogallery.msdn.microsoft.com/eaab33c3-437b-4918-8354-872dfe5d1bfe) powered by Markdig!
 - Converter to **HTML**
 - Passing more than **600+ tests** from the latest [CommonMark specs](http://spec.commonmark.org/)
 - Includes all the core elements of CommonMark:
-  - including GFM fenced code blocks. 
+  - including **GFM fenced code blocks**.  
 - **Extensible** architecture
   - Even the core Markdown/CommonMark parsing is pluggable, so it allows to disable builtin Markdown/Commonmark parsing (e.g [Disable HTML parsing](https://github.com/lunet-io/markdig/blob/7964bd0160d4c18e4155127a4c863d61ebd8944a/src/Markdig/MarkdownExtensions.cs#L306)) or change behaviour (e.g change matching `#` of a headers with `@`)   
 - Built-in with **20+ extensions**, including:

src/Markdig.Tests/Markdig.Tests.csproj

@@ -59,9 +59,11 @@
       <DesignTime>True</DesignTime>
       <DependentUpon>Specs.tt</DependentUpon>
     </Compile>
+    <Compile Include="TestHtmlAttributes.cs" />
     <Compile Include="TestHtmlHelper.cs" />
     <Compile Include="TestLineReader.cs" />
     <Compile Include="TestLinkHelper.cs" />
+    <Compile Include="TestPragmaLines.cs" />
     <Compile Include="TestSourcePosition.cs" />
     <Compile Include="TestStringSliceList.cs" />
     <Compile Include="TestPlayParser.cs" />

src/Markdig.Tests/Specs/EmojiSpecs.md

@@ -11,3 +11,11 @@ This is a test with a :) and a :angry: smiley
 .
 <p>This is a test with a 😃 and a 😠 smiley</p>
 ````````````````````````````````
+
+An emoji needs to be preceded by a space and followed by a space:
+
+```````````````````````````````` example
+These are not:) an :)emoji with a:) x:angry:x
+.
+<p>These are not:) an :)emoji with a:) x:angry:x</p>
+````````````````````````````````

src/Markdig.Tests/Specs/FootnotesSpecs.md

@@ -61,3 +61,60 @@ multi-paragraph list items.<a href="#fnref:3" class="footnote-back-ref">&#8617;<
 </div>
 ````````````````````````````````
 
+Check with mulitple consecutive footnotes:
+
+```````````````````````````````` example
+Here is a footnote[^1]. And another one[^2]. And a third one[^3]. And a fourth[^4].
+
+[^1]: Footnote 1 text
+
+[^2]: Footnote 2 text
+
+a
+
+[^3]: Footnote 3 text
+
+[^4]: Footnote 4 text
+.
+<p>Here is a footnote<a id="fnref:1" href="#fn:1" class="footnote-ref"><sup>1</sup></a>. And another one<a id="fnref:2" href="#fn:2" class="footnote-ref"><sup>2</sup></a>. And a third one<a id="fnref:3" href="#fn:3" class="footnote-ref"><sup>3</sup></a>. And a fourth<a id="fnref:4" href="#fn:4" class="footnote-ref"><sup>4</sup></a>.</p>
+<p>a</p>
+<div class="footnotes">
+<hr />
+<ol>
+<li id="fn:1">
+<p>Footnote 1 text<a href="#fnref:1" class="footnote-back-ref">&#8617;</a></p></li>
+<li id="fn:2">
+<p>Footnote 2 text<a href="#fnref:2" class="footnote-back-ref">&#8617;</a></p></li>
+<li id="fn:3">
+<p>Footnote 3 text<a href="#fnref:3" class="footnote-back-ref">&#8617;</a></p></li>
+<li id="fn:4">
+<p>Footnote 4 text<a href="#fnref:4" class="footnote-back-ref">&#8617;</a></p></li>
+</ol>
+</div>
+````````````````````````````````
+
+Another test with consecutive footnotes without a blank line separator:
+
+```````````````````````````````` example
+Here is a footnote[^1]. And another one[^2]. And a third one[^3]. And a fourth[^4].
+
+[^1]: Footnote 1 text
+[^2]: Footnote 2 text
+[^3]: Footnote 3 text
+[^4]: Footnote 4 text
+.
+<p>Here is a footnote<a id="fnref:1" href="#fn:1" class="footnote-ref"><sup>1</sup></a>. And another one<a id="fnref:2" href="#fn:2" class="footnote-ref"><sup>2</sup></a>. And a third one<a id="fnref:3" href="#fn:3" class="footnote-ref"><sup>3</sup></a>. And a fourth<a id="fnref:4" href="#fn:4" class="footnote-ref"><sup>4</sup></a>.</p>
+<div class="footnotes">
+<hr />
+<ol>
+<li id="fn:1">
+<p>Footnote 1 text<a href="#fnref:1" class="footnote-back-ref">&#8617;</a></p></li>
+<li id="fn:2">
+<p>Footnote 2 text<a href="#fnref:2" class="footnote-back-ref">&#8617;</a></p></li>
+<li id="fn:3">
+<p>Footnote 3 text<a href="#fnref:3" class="footnote-back-ref">&#8617;</a></p></li>
+<li id="fn:4">
+<p>Footnote 4 text<a href="#fnref:4" class="footnote-back-ref">&#8617;</a></p></li>
+</ol>
+</div>
+````````````````````````````````

src/Markdig.Tests/Specs/PipeTableSpecs.md

@@ -377,6 +377,31 @@ The text alignment can be changed by using the character `:` with the header col
 </table>
 ````````````````````````````````
 
+Test alignment with starting and ending pipes:
+
+```````````````````````````````` example
+| abc | def | ghi |
+|:---:|-----|----:|
+|  1  | 2   | 3   |
+.
+<table>
+<thead>
+<tr>
+<th style="text-align: center;">abc</th>
+<th>def</th>
+<th style="text-align: right;">ghi</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td style="text-align: center;">1</td>
+<td>2</td>
+<td style="text-align: right;">3</td>
+</tr>
+</tbody>
+</table>
+````````````````````````````````
+
 The following example shows a non matching header column separator:
  
 ```````````````````````````````` example

src/Markdig.Tests/Specs/SmartyPantsSpecs.md

@@ -83,29 +83,6 @@ They are' not matching 'quotes
 .
 <p>They are' not matching 'quotes</p>
 ````````````````````````````````
-
-Double quotes using ``` `` ``` are working if they match another `''` pair, and there is no other double quotes on the line (otherwise they would be parsed as a code span):
-
-```````````````````````````````` example
-This is ``a double quote''
-.
-<p>This is &ldquo;a double quote&rdquo;</p>
-````````````````````````````````
-
-```````````````````````````````` example
-This is ``a code span''`` 
-.
-<p>This is <code>a code span''</code></p>
-````````````````````````````````
-
-```````````````````````````````` example
-hello ``there```
-test
-.
-<p>hello &ldquo;there&rdquo;`
-test</p>
-````````````````````````````````
-
 An emphasis starting inside left/right quotes will span over the right quote:
 
 ```````````````````````````````` example
@@ -133,3 +110,26 @@ This is a en ellipsis...
 .
 <p>This is a en ellipsis&hellip;</p>
 ````````````````````````````````
+
+Check that a smartypants are not breaking pipetable parsing:
+
+```````````````````````````````` example
+a  | b
+-- | --
+0  | 1
+.
+<table>
+<thead>
+<tr>
+<th>a</th>
+<th>b</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td>0</td>
+<td>1</td>
+</tr>
+</tbody>
+</table>
+````````````````````````````````

src/Markdig.Tests/Specs/Specs.tt

@@ -39,24 +39,24 @@ SOFTWARE.
 <#@ output extension=".cs" #><#
     var specFiles = new KeyValuePair<string, string>[] {
 		new KeyValuePair<string, string>("https://raw.githubusercontent.com/jgm/CommonMark/master/spec.txt", string.Empty),
-		new KeyValuePair<string, string>(Host.ResolvePath("PipeTableSpecs.md"), "pipetables"),
-		new KeyValuePair<string, string>(Host.ResolvePath("FootnotesSpecs.md"), "footnotes"),
-		new KeyValuePair<string, string>(Host.ResolvePath("GenericAttributesSpecs.md"), "attributes"),
-		new KeyValuePair<string, string>(Host.ResolvePath("EmphasisExtraSpecs.md"), "emphasisextras"),
-		new KeyValuePair<string, string>(Host.ResolvePath("HardlineBreakSpecs.md"), "hardlinebreak"),
-		new KeyValuePair<string, string>(Host.ResolvePath("GridTableSpecs.md"), "gridtables"),
-		new KeyValuePair<string, string>(Host.ResolvePath("CustomContainerSpecs.md"), "customcontainers+attributes"),
-		new KeyValuePair<string, string>(Host.ResolvePath("DefinitionListSpecs.md"), "definitionlists+attributes"),
-		new KeyValuePair<string, string>(Host.ResolvePath("EmojiSpecs.md"), "emojis"),
-		new KeyValuePair<string, string>(Host.ResolvePath("AbbreviationSpecs.md"), "abbreviations"),
-		new KeyValuePair<string, string>(Host.ResolvePath("ListExtraSpecs.md"), "listextras"),
-		new KeyValuePair<string, string>(Host.ResolvePath("FigureFooterAndCiteSpecs.md"), "figures+footers+citations"),
-		new KeyValuePair<string, string>(Host.ResolvePath("MathSpecs.md"), "mathematics"),
+		new KeyValuePair<string, string>(Host.ResolvePath("PipeTableSpecs.md"), "pipetables|advanced"),
+		new KeyValuePair<string, string>(Host.ResolvePath("FootnotesSpecs.md"), "footnotes|advanced"),
+		new KeyValuePair<string, string>(Host.ResolvePath("GenericAttributesSpecs.md"), "attributes|advanced"),
+		new KeyValuePair<string, string>(Host.ResolvePath("EmphasisExtraSpecs.md"), "emphasisextras|advanced"),
+		new KeyValuePair<string, string>(Host.ResolvePath("HardlineBreakSpecs.md"), "hardlinebreak|advanced+hardlinebreak"),
+		new KeyValuePair<string, string>(Host.ResolvePath("GridTableSpecs.md"), "gridtables|advanced"),
+		new KeyValuePair<string, string>(Host.ResolvePath("CustomContainerSpecs.md"), "customcontainers+attributes|advanced"),
+		new KeyValuePair<string, string>(Host.ResolvePath("DefinitionListSpecs.md"), "definitionlists+attributes|advanced"),
+		new KeyValuePair<string, string>(Host.ResolvePath("EmojiSpecs.md"), "emojis|advanced+emojis"),
+		new KeyValuePair<string, string>(Host.ResolvePath("AbbreviationSpecs.md"), "abbreviations|advanced"),
+		new KeyValuePair<string, string>(Host.ResolvePath("ListExtraSpecs.md"), "listextras|advanced"),
+		new KeyValuePair<string, string>(Host.ResolvePath("FigureFooterAndCiteSpecs.md"), "figures+footers+citations|advanced"),
+		new KeyValuePair<string, string>(Host.ResolvePath("MathSpecs.md"), "mathematics|advanced"),
 		new KeyValuePair<string, string>(Host.ResolvePath("BootstrapSpecs.md"), "bootstrap+pipetables+figures+attributes"),
-		new KeyValuePair<string, string>(Host.ResolvePath("MediaSpecs.md"), "medialinks"),
-		new KeyValuePair<string, string>(Host.ResolvePath("SmartyPantsSpecs.md"), "smartypants"),
-		new KeyValuePair<string, string>(Host.ResolvePath("AutoIdentifierSpecs.md"), "autoidentifiers"),
-		new KeyValuePair<string, string>(Host.ResolvePath("TaskListSpecs.md"), "tasklists"),
+		new KeyValuePair<string, string>(Host.ResolvePath("MediaSpecs.md"), "medialinks|advanced+medialinks"),
+		new KeyValuePair<string, string>(Host.ResolvePath("SmartyPantsSpecs.md"), "pipetables+smartypants|advanced+smartypants"),   // Check with smartypants to make sure that it doesn't break pipetables
+		new KeyValuePair<string, string>(Host.ResolvePath("AutoIdentifierSpecs.md"), "autoidentifiers|advanced"),
+		new KeyValuePair<string, string>(Host.ResolvePath("TaskListSpecs.md"), "tasklists|advanced"),
 	};
     var emptyLines = false;
     var displayEmptyLines = false;

src/Markdig.Tests/Specs/TaskListSpecs.md

@@ -12,10 +12,10 @@ A task list item consist of `[ ]` or `[x]` or `[X]` inside a list item (ordered
 - [ ] Item3
 - Item4
 .
-<ul>
-<li><input disabled="disabled" type="checkbox" /> Item1</li>
-<li><input disabled="disabled" type="checkbox" checked="checked" /> Item2</li>
-<li><input disabled="disabled" type="checkbox" /> Item3</li>
+<ul class="contains-task-list">
+<li class="task-list-item"><input disabled="disabled" type="checkbox" /> Item1</li>
+<li class="task-list-item"><input disabled="disabled" type="checkbox" checked="checked" /> Item2</li>
+<li class="task-list-item"><input disabled="disabled" type="checkbox" /> Item3</li>
 <li>Item4</li>
 </ul>
 ````````````````````````````````

src/Markdig.Tests/TestHtmlAttributes.cs

@@ -0,0 +1,96 @@
+// Copyright (c) Alexandre Mutel. All rights reserved.
+// This file is licensed under the BSD-Clause 2 license. 
+// See the license.txt file in the project root for more information.
+
+using Markdig.Renderers.Html;
+using NUnit.Framework;
+using System.Collections.Generic;
+
+namespace Markdig.Tests
+{
+    [TestFixture()]
+    public class TestHtmlAttributes
+    {
+        [Test]
+        public void TestAddClass()
+        {
+            var attributes = new HtmlAttributes();
+            attributes.AddClass("test");
+            Assert.NotNull(attributes.Classes);
+            Assert.AreEqual(new List<string>() { "test" }, attributes.Classes);
+
+            attributes.AddClass("test");
+            Assert.AreEqual(1, attributes.Classes.Count);
+
+            attributes.AddClass("test1");
+            Assert.AreEqual(new List<string>() { "test", "test1" }, attributes.Classes);
+        }
+
+        [Test]
+        public void TestAddProperty()
+        {
+            var attributes = new HtmlAttributes();
+            attributes.AddProperty("key1", "1");
+            Assert.NotNull(attributes.Properties);
+            Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1") }, attributes.Properties);
+
+            attributes.AddPropertyIfNotExist("key1", "1");
+            Assert.NotNull(attributes.Properties);
+            Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1") }, attributes.Properties);
+
+            attributes.AddPropertyIfNotExist("key2", "2");
+            Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1"), new KeyValuePair<string, string>("key2", "2") }, attributes.Properties);
+        }
+
+        [Test]
+        public void TestCopyTo()
+        {
+            var from = new HtmlAttributes();
+            from.AddClass("test");
+            from.AddProperty("key1", "1");
+
+            var to = new HtmlAttributes();
+            from.CopyTo(to);
+
+            Assert.True(ReferenceEquals(from.Classes, to.Classes));
+            Assert.True(ReferenceEquals(from.Properties, to.Properties));
+
+            //          From: Classes      From: Properties     To: Classes     To: Properties
+            // test1:        null                null              null             null
+            from = new HtmlAttributes();
+            to = new HtmlAttributes();
+            from.CopyTo(to, false, false);
+            Assert.Null(to.Classes);
+            Assert.Null(to.Properties);
+
+            // test2:      ["test"]            ["key1", "1"]       null             null
+            from = new HtmlAttributes();
+            to = new HtmlAttributes();
+            from.AddClass("test");
+            from.AddProperty("key1", "1");
+            from.CopyTo(to, false, false);
+            Assert.AreEqual(new List<string>() { "test" }, to.Classes);
+            Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1")}, to.Properties);
+
+            // test3:        null                null            ["test"]       ["key1", "1"]       
+            from = new HtmlAttributes();
+            to = new HtmlAttributes();
+            to.AddClass("test");
+            to.AddProperty("key1", "1");
+            from.CopyTo(to, false, false);
+            Assert.AreEqual(new List<string>() { "test" }, to.Classes);
+            Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1") }, to.Properties);
+
+            // test4:      ["test1"]           ["key2", "2"]     ["test"]       ["key1", "1"]       
+            from = new HtmlAttributes();
+            to = new HtmlAttributes();
+            from.AddClass("test1");
+            from.AddProperty("key2", "2");
+            to.AddClass("test");
+            to.AddProperty("key1", "1");
+            from.CopyTo(to, false, false);
+            Assert.AreEqual(new List<string>() { "test", "test1" }, to.Classes);
+            Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1"), new KeyValuePair<string, string>("key2", "2") }, to.Properties);
+        }
+    }
+}

src/Markdig.Tests/TestParser.cs

@@ -64,7 +64,8 @@ namespace Markdig.Tests
             var extensionGroups = extensionsGroupText.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
             foreach (var extensionsText in extensionGroups)
             {
-                var pipeline = new MarkdownPipelineBuilder().Configure(extensionsText);
+                var builder = new MarkdownPipelineBuilder();
+                var pipeline = extensionsText == "self" ? builder.UseSelfPipeline() : builder.Configure(extensionsText);
                 yield return new KeyValuePair<string, MarkdownPipeline>(extensionsText, pipeline.Build());
             }
         }
@@ -78,7 +79,7 @@ namespace Markdig.Tests
         private static string Compact(string html)
         {
             // Normalize the output to make it compatible with CommonMark specs
-            html = html.Replace("\r", "").Trim();
+            html = html.Replace("\r\n", "\n").Replace(@"\r", @"\n").Trim();
             html = Regex.Replace(html, @"\s+</li>", "</li>");
             html = Regex.Replace(html, @"<li>\s+", "<li>");
             html = html.Normalize(NormalizationForm.FormKD);

src/Markdig.Tests/TestPlayParser.cs

@@ -27,6 +27,112 @@ Later in a text we are using HTML and it becomes an abbr tag HTML
             Console.WriteLine(result);
         }
 
+        [Test]
+        public void TestPipeTables()
+        {
+            TestParser.TestSpec(@"
+| abc | def | ghi |
+|:---:|-----|----:|
+|  1  | 2   | 3   |
+", @"
+<table>
+<thead>
+<tr>
+<th style=""text-align: center;"">abc</th>
+<th>def</th>
+<th style=""text-align: right;"">ghi</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td style=""text-align: center;"">1</td>
+<td>2</td>
+<td style=""text-align: right;"">3</td>
+</tr>
+</tbody>
+</table>
+", "advanced");
+        }
+
+        [Test]
+        public void TestSelfPipeline1()
+        {
+            var text = @" <!--markdig:pipetables-->
+
+a | b
+- | -
+0 | 1
+";
+            TestParser.TestSpec(text, @"<!--markdig:pipetables-->
+<table>
+<thead>
+<tr>
+<th>a</th>
+<th>b</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td>0</td>
+<td>1</td>
+</tr>
+</tbody>
+</table>
+", "self");
+        }
+
+        [Test]
+        public void TestListBug()
+        {
+            // TODO: Add this test back to the CommonMark specs
+            var text = @"- item1
+  - item2
+    - item3
+      - item4";
+            TestParser.TestSpec(text, @"<ul>
+<li>item1
+<ul>
+<li>item2
+<ul>
+<li>item3
+<ul>
+<li>item4</li>
+</ul></li>
+</ul></li>
+</ul></li>
+</ul>
+");
+        }
+
+
+        [Test]
+        public void TestHtmlBug()
+        {
+            TestParser.TestSpec(@" # header1
+
+<pre class='copy'>
+blabla
+</pre>
+
+# header2
+", @"<h1>header1</h1>
+<pre class='copy'>
+blabla
+</pre>
+<h1>header2</h1>");
+        }
+
+
+
+        [Test]
+        public void TestBugAdvancaed()
+        {
+            TestParser.TestSpec(@"`https://{domain}/callbacks`
+#### HEADING
+Paragraph
+", "<p><code>https://{domain}/callbacks</code></p>\n<h4 id=\"heading\">HEADING</h4>\n<p>Paragraph</p>", "advanced");
+        }
+
         [Test]
         public void TestSamePipelineAllExtensions()
         {

src/Markdig.Tests/TestPragmaLines.cs

@@ -0,0 +1,81 @@
+// Copyright (c) Alexandre Mutel. All rights reserved.
+// This file is licensed under the BSD-Clause 2 license. 
+// See the license.txt file in the project root for more information.
+
+using Markdig.Renderers;
+using Markdig.Syntax;
+using NUnit.Framework;
+
+namespace Markdig.Tests
+{
+    [TestFixture]
+    public class TestPragmaLines
+    {
+        [Test]
+        public void TestFindClosest()
+        {
+            var doc = Markdown.Parse(
+"test1\n" +                      // 0
+"\n" +                           // 1
+"test2\n" +                      // 2
+"\n" +                           // 3
+"test3\n" +                      // 4
+"\n" +                           // 5
+"test4\n" +                      // 6
+"\n" +                           // 7
+"# Heading\n" +                  // 8
+"\n" +                           // 9
+"Long para\n" +                  // 10
+"on multiple\n" +                // 11
+"lines\n" +                      // 12
+"to check that\n" +              // 13
+"lines are\n" +                  // 14
+"correctly \n" +                 // 15
+"found\n" +                      // 16
+"\n" +                           // 17
+"- item1\n" +                    // 18
+"- item2\n" +                    // 19
+"- item3\n" +                    // 20
+"\n" +                           // 21
+"This is a last paragraph\n"     // 22
+                , new MarkdownPipelineBuilder().UsePragmaLines().Build());
+
+            foreach (var exact in new int[] {0, 2, 4, 6, 8, 10, 18, 19, 20, 22})
+            {
+                Assert.AreEqual(exact, doc.FindClosestLine(exact));
+            }
+
+            Assert.AreEqual(22, doc.FindClosestLine(23));
+
+            Assert.AreEqual(10, doc.FindClosestLine(11));
+            Assert.AreEqual(10, doc.FindClosestLine(12));
+            Assert.AreEqual(10, doc.FindClosestLine(13));
+            Assert.AreEqual(18, doc.FindClosestLine(14)); // > 50% of the paragraph, we switch to next
+            Assert.AreEqual(18, doc.FindClosestLine(15));
+            Assert.AreEqual(18, doc.FindClosestLine(16));
+        }
+
+        [Test]
+        public void TestFindClosest1()
+        {
+            var text = 
+"- item1\n" +                    // 0
+"  - item11\n" +                 // 1
+"  - item12\n" +                 // 2
+"    - item121\n" +              // 3
+"  - item13\n" +                 // 4
+"    - item131\n" +              // 5
+"      - item1311\n";            // 6
+
+            var pipeline = new MarkdownPipelineBuilder().UsePragmaLines().Build();
+            var doc = Markdown.Parse(text, pipeline);
+
+            for (int exact = 0; exact < 7; exact++)
+            {
+                Assert.AreEqual(exact, doc.FindClosestLine(exact));
+            }
+
+            Assert.AreEqual(6, doc.FindClosestLine(50));
+        }
+    }
+}

src/Markdig.Tests/TestSourcePosition.cs

@@ -88,9 +88,9 @@ literal      ( 0, 5)  5-11
             Check("01*2**3*", @"
 paragraph    ( 0, 0)  0-7
 literal      ( 0, 0)  0-1
-emphasis     ( 0, 2)  2-4
+emphasis     ( 0, 2)  2-7
 literal      ( 0, 3)  3-3
-emphasis     ( 0, 5)  5-7
+literal      ( 0, 4)  4-5
 literal      ( 0, 6)  6-6
 ");
         }
@@ -206,19 +206,6 @@ literal      ( 0, 4)  4-5
             Assert.AreEqual(SourceSpan.Empty, link.TitleSpan);
         }
 
-        [Test]
-        public void TestHtmlInline()
-        {
-            //     0123456789
-            Check("01<b>4</b>", @"
-paragraph    ( 0, 0)  0-9
-literal      ( 0, 0)  0-1
-html         ( 0, 2)  2-4
-literal      ( 0, 5)  5-5
-html         ( 0, 6)  6-9
-");
-        }
-
         [Test]
         public void TestAutolinkInline()
         {
@@ -252,6 +239,64 @@ literal      ( 4, 0) 16-16
 ");
         }
 
+        [Test]
+        public void TestHtmlBlock1()
+        {
+            //     0           1
+            //     01 2 345678901 23
+            Check("0\n\n<!--A-->\n1\n", @"
+paragraph    ( 0, 0)  0-0
+literal      ( 0, 0)  0-0
+html         ( 2, 0)  3-10
+paragraph    ( 3, 0) 12-12
+literal      ( 3, 0) 12-12
+");
+        }
+
+        [Test]
+        public void TestHtmlComment()
+        {
+            //     0         1          2
+            //     012345678901 234567890 1234
+            Check("# 012345678\n<!--0-->\n123\n", @"
+heading      ( 0, 0)  0-10
+literal      ( 0, 2)  2-10
+html         ( 1, 0) 12-19
+paragraph    ( 2, 0) 21-23
+literal      ( 2, 0) 21-23
+");
+        }
+
+        [Test]
+        public void TestHtmlInline()
+        {
+            //     0123456789
+            Check("01<b>4</b>", @"
+paragraph    ( 0, 0)  0-9
+literal      ( 0, 0)  0-1
+html         ( 0, 2)  2-4
+literal      ( 0, 5)  5-5
+html         ( 0, 6)  6-9
+");
+        }
+
+        [Test]
+        public void TestHtmlInline1()
+        {
+            //     0         
+            //     0123456789
+            Check("0<!--A-->1", @"
+paragraph    ( 0, 0)  0-9
+literal      ( 0, 0)  0-0
+html         ( 0, 1)  1-8
+literal      ( 0, 9)  9-9
+");
+        }
+
+
+
+
+
         [Test]
         public void TestThematicBreak()
         {

src/Markdig/Extensions/AutoIdentifiers/AutoIdentifierExtension.cs

@@ -132,6 +132,13 @@ namespace Markdig.Extensions.AutoIdentifiers
                 return;
             }
 
+            // If id is already set, don't try to modify it
+            var attributes = processor.Block.GetAttributes();
+            if (attributes.Id != null)
+            {
+                return;
+            }
+
             // Use a HtmlRenderer with 
             stripRenderer.Render(headingBlock.Inline);
             var headingText = headingWriter.ToString();
@@ -152,7 +159,7 @@ namespace Markdig.Extensions.AutoIdentifiers
                 headingBuffer.Length = 0;
             }
 
-            processor.Block.GetAttributes().Id = headingId;
+            attributes.Id = headingId;
         }
     }
 }

src/Markdig/Extensions/DefinitionLists/DefinitionListParser.cs

@@ -98,7 +98,7 @@ namespace Markdig.Extensions.DefinitionLists
             processor.Open(definitionItem);
 
             // Update the end position
-            currentDefinitionList.Span.End = processor.Line.End;
+            currentDefinitionList.UpdateSpanEnd(processor.Line.End);
 
             return BlockState.Continue;
         }

src/Markdig/Extensions/Emoji/EmojiParser.cs

@@ -67,18 +67,34 @@ namespace Markdig.Extensions.Emoji
         public override bool Match(InlineProcessor processor, ref StringSlice slice)
         {
             string match;
+
+            // Previous char must be a space
+            if (!slice.PeekCharExtra(-1).IsWhiteSpaceOrZero())
+            {
+                return false;
+            }
+
+            // Try to match an existing emoji
             var startPosition = slice.Start;
             if (!textMatchHelper.TryMatch(slice.Text, slice.Start, slice.Length, out match))
             {
                 return false;
             }
 
+            // Following char must be a space
+            if (!slice.PeekCharExtra(match.Length).IsWhiteSpaceOrZero())
+            {
+                return false;
+            }
+
+            // If we have a smiley, we decode it to emoji
             string emoji;
             if (!SmileyToEmoji.TryGetValue(match, out emoji))
             {
                 emoji = match;
             }
 
+            // Decode the eomji to unicode
             string unicode;
             if (!EmojiToUnicode.TryGetValue(emoji, out unicode))
             {

src/Markdig/Extensions/Figures/FigureBlockParser.cs

@@ -114,7 +114,7 @@ namespace Markdig.Extensions.Figures
                     figure.Add(caption);
                 }
 
-                figure.Span.End = line.End;
+                figure.UpdateSpanEnd(line.End);
 
                 // Don't keep the last line
                 return BlockState.BreakDiscard;
@@ -123,7 +123,7 @@ namespace Markdig.Extensions.Figures
             // Reset the indentation to the column before the indent
             processor.GoToColumn(processor.ColumnBeforeIndent);
 
-            figure.Span.End = line.End;
+            figure.UpdateSpanEnd(line.End);
 
             return BlockState.Continue;
         }

src/Markdig/Extensions/Footers/FooterBlockParser.cs

@@ -80,7 +80,7 @@ namespace Markdig.Extensions.Footers
                 {
                     processor.NextChar(); // Skip following space
                 }
-                block.Span.End = processor.Line.End;
+                block.UpdateSpanEnd(processor.Line.End);
             }
             return result;
         }

src/Markdig/Extensions/Footnotes/FootnoteParser.cs

@@ -26,9 +26,14 @@ namespace Markdig.Extensions.Footnotes
         }
 
         public override BlockState TryOpen(BlockProcessor processor)
+        {
+            return TryOpen(processor, false);
+        }
+
+        private BlockState TryOpen(BlockProcessor processor, bool isContinue)
         {
             // We expect footnote to appear only at document level and not indented more than a code indent block
-            if (processor.IsCodeIndent || processor.CurrentContainer.GetType() != typeof(MarkdownDocument) )
+            if (processor.IsCodeIndent || (!isContinue && processor.CurrentContainer.GetType() != typeof(MarkdownDocument)) || (isContinue && !(processor.CurrentContainer is Footnote)))
             {
                 return BlockState.None;
             }
@@ -42,7 +47,7 @@ namespace Markdig.Extensions.Footnotes
                 processor.GoToColumn(saved);
                 return BlockState.None;
             }
-           
+
             // Advance the column
             int deltaColumn = processor.Start - start;
             processor.Column = processor.Column + deltaColumn;
@@ -88,9 +93,23 @@ namespace Markdig.Extensions.Footnotes
                     return BlockState.ContinueDiscard;
                 }
 
-                if (footnote.IsLastLineEmpty && processor.Column == 0)
+                if (processor.Column == 0)
                 {
-                    return BlockState.Break;
+                    if (footnote.IsLastLineEmpty)
+                    {
+                        // Close the current footnote
+                        processor.Close(footnote);
+
+                        // Parse any opening footnote
+                        return TryOpen(processor);
+                    }
+
+                    // Make sure that consecutive footnotes without a blanklines are parsed correctly
+                    if (TryOpen(processor, true) == BlockState.Continue)
+                    {
+                        processor.Close(footnote);
+                        return BlockState.Continue;
+                    }
                 }
             }
             footnote.IsLastLineEmpty = false;

src/Markdig/Extensions/GenericAttributes/GenericAttributesExtension.cs

@@ -46,7 +46,7 @@ namespace Markdig.Extensions.GenericAttributes
             // Try to find if there is any attributes { in the info string on the first line of a FencedCodeBlock
             if (line.Start < line.End)
             {
-                var indexOfAttributes = line.Text.LastIndexOf('{', line.End);
+                int indexOfAttributes = line.IndexOf('{');
                 if (indexOfAttributes >= 0)
                 {
                     // Work on a copy

src/Markdig/Extensions/GenericAttributes/GenericAttributesParser.cs

@@ -64,7 +64,7 @@ namespace Markdig.Extensions.GenericAttributes
                 }
 
                 var currentHtmlAttributes = objectToAttach.GetAttributes();
-                attributes.CopyTo(currentHtmlAttributes);
+                attributes.CopyTo(currentHtmlAttributes, false, false);
 
                 // Update the position of the attributes
                 int line;

src/Markdig/Extensions/Mathematics/MathInlineParser.cs

@@ -13,7 +13,7 @@ namespace Markdig.Extensions.Mathematics
     /// An inline parser for <see cref="MathInline"/>.
     /// </summary>
     /// <seealso cref="Markdig.Parsers.InlineParser" />
-    /// <seealso cref="Markdig.Parsers.IDelimiterProcessor" />
+    /// <seealso cref="IPostInlineProcessor" />
     public class MathInlineParser : InlineParser
     {
         /// <summary>

src/Markdig/Extensions/PragmaLines/PragmaLineExtension.cs

@@ -0,0 +1,79 @@
+// Copyright (c) Alexandre Mutel. All rights reserved.
+// This file is licensed under the BSD-Clause 2 license. 
+// See the license.txt file in the project root for more information.
+
+using System;
+using Markdig.Helpers;
+using Markdig.Renderers;
+using Markdig.Renderers.Html;
+using Markdig.Syntax;
+using Markdig.Syntax.Inlines;
+
+namespace Markdig.Extensions.PragmaLines
+{
+    /// <summary>
+    /// Extension to a span for each line containing the original line id (using id = pragma-line#line_number_zero_based)
+    /// </summary>
+    /// <seealso cref="Markdig.IMarkdownExtension" />
+    public class PragmaLineExtension : IMarkdownExtension
+    {
+        public void Setup(MarkdownPipelineBuilder pipeline)
+        {
+            pipeline.DocumentProcessed -= PipelineOnDocumentProcessed;
+            pipeline.DocumentProcessed += PipelineOnDocumentProcessed;
+        }
+
+        public void Setup(IMarkdownRenderer renderer)
+        {
+        }
+
+        private static void PipelineOnDocumentProcessed(MarkdownDocument document)
+        {
+            int index = 0;
+            AddPragmas(document, ref index);
+        }
+
+        private static void AddPragmas(Block block, ref int index)
+        {
+            var attribute = block.GetAttributes();
+            var pragmaId = GetPragmaId(block);
+            if ( attribute.Id == null)
+            {
+                attribute.Id = pragmaId;
+            }
+            else if (block.Parent != null)
+            {
+                var heading = block as HeadingBlock;
+
+                // If we have a heading, we will try to add the tag inside it
+                // otherwise we will add it just before
+                var tag = $"<a id=\"{pragmaId}\"></a>";
+                if (heading?.Inline?.FirstChild != null)
+                {
+                    heading.Inline.FirstChild.InsertBefore(new HtmlInline() { Tag = tag });
+
+                }
+                else
+                {
+                    block.Parent.Insert(index, new HtmlBlock(null) { Lines = new StringLineGroup(tag) });
+                    index++;
+                }
+            }
+
+            var container = block as ContainerBlock;
+            if (container != null)
+            {
+                for (int i = 0; i < container.Count; i++)
+                {
+                    var subBlock = container[i];
+                    AddPragmas(subBlock, ref i);
+                }
+            }
+        }
+
+        private static string GetPragmaId(Block block)
+        {
+            return $"pragma-line-{block.Line}";
+        }
+    }
+}

src/Markdig/Extensions/SelfPipeline/SelfPipelineExtension.cs

@@ -0,0 +1,99 @@
+// Copyright (c) Alexandre Mutel. All rights reserved.
+// This file is licensed under the BSD-Clause 2 license. 
+// See the license.txt file in the project root for more information.
+
+using System;
+using Markdig.Renderers;
+
+namespace Markdig.Extensions.SelfPipeline
+{
+    /// <summary>
+    /// Extension to enable SelfPipeline, to configure a Markdown parsing/convertion to HTML automatically 
+    /// from an embedded special tag in the input text <code>&lt;!--markdig:extensions--&gt;</code> where extensions is a string
+    /// that specifies the extensions to use for the pipeline as exposed by <see cref="MarkdownExtensions.Configure"/> extension method
+    /// on the <see cref="MarkdownPipelineBuilder"/>. This extension will invalidate all other extensions and will override them.
+    /// </summary>
+    public sealed class SelfPipelineExtension : IMarkdownExtension
+    {
+        public const string DefaultTag = "markdig";
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SelfPipelineExtension"/> class.
+        /// </summary>
+        /// <param name="tag">The matching start tag.</param>
+        /// <param name="defaultExtensions">The default extensions.</param>
+        /// <exception cref="System.ArgumentException">Tag cannot contain `<`  or `>` characters</exception>
+        public SelfPipelineExtension(string tag = null, string defaultExtensions = null)
+        {
+            tag = tag?.Trim();
+            tag = string.IsNullOrEmpty(tag) ? DefaultTag : tag;
+            if (tag.IndexOfAny(new []{'<', '>'}) >= 0)
+            {
+                throw new ArgumentException("Tag cannot contain `<`  or `>` characters", nameof(tag));
+            }
+
+            if (defaultExtensions != null)
+            {
+                // Check that this default pipeline is supported
+                // Will throw an ArgumentInvalidException if not
+                new MarkdownPipelineBuilder().Configure(defaultExtensions);
+            }
+            DefaultExtensions = defaultExtensions;
+            SelfPipelineHintTagStart = "<!--" + tag + ":";
+        }
+
+        /// <summary>
+        /// Gets the default pipeline to configure if no tag was found in the input text. Default is <c>null</c> (core pipeline).
+        /// </summary>
+        public string DefaultExtensions { get; }
+
+        /// <summary>
+        /// Gets the self pipeline hint tag start that will be matched.
+        /// </summary>
+        public string SelfPipelineHintTagStart { get; }
+
+        public void Setup(MarkdownPipelineBuilder pipeline)
+        {
+            // Make sure that this pipeline has only one extension (itself)
+            if (pipeline.Extensions.Count > 1)
+            {
+                throw new InvalidOperationException(
+                    "The SelfPipeline extension cannot be configured with other extensions");
+            }
+        }
+
+        public void Setup(IMarkdownRenderer renderer)
+        {
+        }
+
+        /// <summary>
+        /// Creates a pipeline automatically configured from an input markdown based on the presence of the configuration tag.
+        /// </summary>
+        /// <param name="inputText">The input text.</param>
+        /// <returns>The pipeline configured from the input</returns>
+        /// <exception cref="System.ArgumentNullException"></exception>
+        public MarkdownPipeline CreatePipelineFromInput(string inputText)
+        {
+            if (inputText == null) throw new ArgumentNullException(nameof(inputText));
+
+            var builder = new MarkdownPipelineBuilder();
+            string defaultConfig = DefaultExtensions;
+            var indexOfSelfPipeline = inputText.IndexOf(SelfPipelineHintTagStart, StringComparison.OrdinalIgnoreCase);
+            if (indexOfSelfPipeline >= 0)
+            {
+                var optionStart = indexOfSelfPipeline + SelfPipelineHintTagStart.Length;
+                var endOfTag = inputText.IndexOf("-->", optionStart, StringComparison.OrdinalIgnoreCase);
+                if (endOfTag >= 0)
+                {
+                    defaultConfig = inputText.Substring(optionStart, endOfTag - optionStart).Trim();
+                }
+            }
+
+            if (!string.IsNullOrEmpty(defaultConfig))
+            {
+                builder.Configure(defaultConfig);
+            }
+            return builder.Build();
+        }
+    }
+}

src/Markdig/Extensions/SmartyPants/SmartyPantsExtension.cs

@@ -28,10 +28,10 @@ namespace Markdig.Extensions.SmartyPants
 
         public void Setup(MarkdownPipelineBuilder pipeline)
         {
-            if (!pipeline.InlineParsers.Contains<SmaryPantsInlineParser>())
+            if (!pipeline.InlineParsers.Contains<SmartyPantsInlineParser>())
             {
                 // Insert the parser after the code span parser
-                pipeline.InlineParsers.InsertAfter<CodeInlineParser>(new SmaryPantsInlineParser());
+                pipeline.InlineParsers.InsertAfter<CodeInlineParser>(new SmartyPantsInlineParser());
             }
         }
 

src/Markdig/Extensions/SmartyPants/SmartyPantsInlineParser.cs

@@ -4,6 +4,7 @@
 using System.Collections.Generic;
 using Markdig.Helpers;
 using Markdig.Parsers;
+using Markdig.Syntax;
 using Markdig.Syntax.Inlines;
 
 namespace Markdig.Extensions.SmartyPants
@@ -11,14 +12,14 @@ namespace Markdig.Extensions.SmartyPants
     /// <summary>
     /// The inline parser for SmartyPants.
     /// </summary>
-    public class SmaryPantsInlineParser : InlineParser
+    public class SmartyPantsInlineParser : InlineParser, IPostInlineProcessor
     {
         /// <summary>
-        /// Initializes a new instance of the <see cref="SmaryPantsInlineParser"/> class.
+        /// Initializes a new instance of the <see cref="SmartyPantsInlineParser"/> class.
         /// </summary>
-        public SmaryPantsInlineParser()
+        public SmartyPantsInlineParser()
         {
-            OpeningCharacters = new[] {'`', '\'', '"', '<', '>', '.', '-'};
+            OpeningCharacters = new[] {'\'', '"', '<', '>', '.', '-'};
         }
 
         public override bool Match(InlineProcessor processor, ref StringSlice slice)
@@ -30,6 +31,8 @@ namespace Markdig.Extensions.SmartyPants
             // " 	“ ” 	&ldquo; &rdquo; 	'left-double-quote', 'right-double-quote'
             // << >> 	« » 	&laquo; &raquo; 	'left-angle-quote', 'right-angle-quote'
             // ... 	… 	&hellip; 	'ellipsis'
+
+            // Special case: &ndash; and &mdash; are handle as a PostProcess step to avoid conflicts with pipetables header separator row
             // -- 	– 	&ndash; 	'ndash'
             // --- 	— 	&mdash; 	'mdash'
 
@@ -44,13 +47,6 @@ namespace Markdig.Extensions.SmartyPants
 
             switch (c)
             {
-                case '`':
-                    if (slice.PeekChar(1) == '`')
-                    {
-                        slice.NextChar();
-                        type = SmartyPantType.DoubleQuote; // We will resolve them at the end of parsing all inlines
-                    }
-                    break;
                 case '\'':
                     type = SmartyPantType.Quote; // We will resolve them at the end of parsing all inlines
                     if (slice.PeekChar(1) == '\'')
@@ -83,12 +79,8 @@ namespace Markdig.Extensions.SmartyPants
                 case '-':
                     if (slice.NextChar() == '-')
                     {
-                        type = SmartyPantType.Dash2;
-                        if (slice.PeekChar(1) == '-')
-                        {
-                            slice.NextChar();
-                            type = SmartyPantType.Dash3;
-                        }
+                        processor.ParserStates[Index] = string.Empty;
+                        return false;
                     }
                     break;
             }
@@ -289,5 +281,85 @@ namespace Markdig.Extensions.SmartyPants
 
             pants.Clear();
         }
+
+        bool IPostInlineProcessor.PostProcess(InlineProcessor state, Inline root, Inline lastChild, int postInlineProcessorIndex,
+            bool isFinalProcessing)
+        {
+            // Don't try to process anything if there are no dash
+            if (state.ParserStates[Index] == null)
+            {
+                return true;
+            }
+
+            var child = root;
+            var pendingContainers = new Stack<Inline>();
+
+            while (true)
+            {
+                while (child != null)
+                {
+                    var next = child.NextSibling;
+
+                    if (child is LiteralInline)
+                    {
+                        var literal = (LiteralInline) child;
+
+                        var startIndex = 0;
+
+                        var indexOfDash = literal.Content.IndexOf("--", startIndex);
+                        if (indexOfDash >= 0)
+                        {
+                            var type = SmartyPantType.Dash2;
+                            if (literal.Content.PeekCharAbsolute(indexOfDash + 2) == '-')
+                            {
+                                type = SmartyPantType.Dash3;
+                            }
+                            var nextContent = literal.Content;
+                            var originalSpan = literal.Span;
+                            literal.Span.End -= literal.Content.End - indexOfDash + 1;
+                            literal.Content.End = indexOfDash - 1;
+                            nextContent.Start = indexOfDash + (type == SmartyPantType.Dash2 ? 2 : 3);
+
+                            var pant = new SmartyPant()
+                            {
+                                Span = new SourceSpan(literal.Content.End + 1, nextContent.Start - 1),
+                                Line = literal.Line,
+                                Column = literal.Column,
+                                OpeningCharacter = '-',
+                                Type = type
+                            };
+                            literal.InsertAfter(pant);
+
+                            var postLiteral = new LiteralInline()
+                            {
+                                Span = new SourceSpan(pant.Span.End + 1, originalSpan.End),
+                                Line = literal.Line,
+                                Column = literal.Column,
+                                Content = nextContent
+                            };
+                            pant.InsertAfter(postLiteral);
+
+                            // Use the pending literal to proceed further
+                            next = postLiteral;
+                        }
+                    }
+                    else if (child is ContainerInline)
+                    {
+                        pendingContainers.Push(((ContainerInline)child).FirstChild);
+                    }
+
+                    child = next;
+                }
+                if (pendingContainers.Count > 0)
+                {
+                    child = pendingContainers.Pop();
+                }
+                else
+                {
+                    break;
+                }
+            }
+            return true;
+        }
     }
 }

src/Markdig/Extensions/Tables/PipeTableParser.cs

@@ -15,8 +15,8 @@ namespace Markdig.Extensions.Tables
     /// The inline parser used to transform a <see cref="ParagraphBlock"/> into a <see cref="Table"/> at inline parsing time.
     /// </summary>
     /// <seealso cref="Markdig.Parsers.InlineParser" />
-    /// <seealso cref="Markdig.Parsers.IDelimiterProcessor" />
-    public class PipeTableParser : InlineParser, IDelimiterProcessor
+    /// <seealso cref="IPostInlineProcessor" />
+    public class PipeTableParser : InlineParser, IPostInlineProcessor
     {
         private LineBreakInlineParser lineBreakParser;
 
@@ -123,7 +123,7 @@ namespace Markdig.Extensions.Tables
             return true;
         }
 
-        public bool ProcessDelimiters(InlineProcessor state, Inline root, Inline lastChild, int delimiterProcessorIndex, bool isFinalProcessing)
+        public bool PostProcess(InlineProcessor state, Inline root, Inline lastChild, int postInlineProcessorIndex, bool isFinalProcessing)
         {
             var container = root as ContainerInline;
             var tableState = state.ParserStates[Index] as TableState;
@@ -379,20 +379,12 @@ namespace Markdig.Extensions.Tables
             }
 
             // Perform delimiter processor that are coming after this processor
-            var delimiterProcessors = state.Parsers.DelimiterProcessors;
-            for (int i = 0; i < delimiterProcessors.Length; i++)
+            foreach (var cell in cells)
             {
-                if (delimiterProcessors[i] == this)
-                {
-                    foreach (var cell in cells)
-                    {
-                        var paragraph = (ParagraphBlock) cell[0];
-
-                        state.ProcessDelimiters(i + 1, paragraph.Inline, null, true);
-                    }
-                    break;
-                }
+                var paragraph = (ParagraphBlock) cell[0];
+                state.PostProcessInlines(postInlineProcessorIndex + 1, paragraph.Inline, null, true);
             }
+
             // Clear cells when we are done
             cells.Clear();
 

src/Markdig/Extensions/TaskLists/TaskListInlineParser.cs

@@ -3,6 +3,7 @@
 // See the license.txt file in the project root for more information.
 using Markdig.Helpers;
 using Markdig.Parsers;
+using Markdig.Renderers.Html;
 using Markdig.Syntax;
 
 namespace Markdig.Extensions.TaskLists
@@ -18,15 +19,29 @@ namespace Markdig.Extensions.TaskLists
         public TaskListInlineParser()
         {
             OpeningCharacters = new[] {'['};
+            ListClass = "contains-task-list";
+            ListItemClass = "task-list-item";
         }
 
+        /// <summary>
+        /// Gets or sets the list class used for a task list.
+        /// </summary>
+        public string ListClass { get; set; }
+
+        /// <summary>
+        /// Gets or sets the list item class used for a task list.
+        /// </summary>
+        public string ListItemClass { get; set; }
+
         public override bool Match(InlineProcessor processor, ref StringSlice slice)
         {
             // A tasklist is either
             // [ ]
             // or [x] or [X]
 
-            if (!(processor.Block.Parent is ListItemBlock))
+            var listItemBlock = processor.Block.Parent as ListItemBlock;
+
+            if (listItemBlock == null)
             {
                 return false;
             }
@@ -56,6 +71,19 @@ namespace Markdig.Extensions.TaskLists
             };
             taskItem.Span.End = taskItem.Span.Start + 2;
             processor.Inline = taskItem;
+
+            // Add proper class for task list
+            if (!string.IsNullOrEmpty(ListItemClass))
+            {
+                listItemBlock.GetAttributes().AddClass(ListItemClass);
+            }
+
+            var listBlock = (ListBlock) listItemBlock.Parent;
+            if (!string.IsNullOrEmpty(ListClass))
+            {
+                listBlock.GetAttributes().AddClass(ListClass);
+            }
+
             return true;
         }
     }

src/Markdig/Helpers/OrderedList.cs

@@ -101,19 +101,5 @@ namespace Markdig.Helpers
             }
             return false;
         }
-
-        public bool ReplacyBy<TElement>(T element) where TElement : T
-        {
-            if (element == null) throw new ArgumentNullException(nameof(element));
-            for (int i = 0; i < Count; i++)
-            {
-                if (this[i] is TElement)
-                {
-                    this[i] = element;
-                    return true;
-                }
-            }
-            return false;
-        }
     }
 }

src/Markdig/Helpers/StringSlice.cs

@@ -194,52 +194,49 @@ namespace Markdig.Helpers
         /// Searches the specified text within this slice.
         /// </summary>
         /// <param name="text">The text.</param>
+        /// <param name="offset">The offset.</param>
+        /// <param name="ignoreCase">true if ignore case</param>
         /// <returns><c>true</c> if the text was found; <c>false</c> otherwise</returns>
-        public bool Search(string text, out int index)
+        public int IndexOf(string text, int offset = 0, bool ignoreCase = false)
         {
-            return Search(text, 0, out index);
+            var end = End - text.Length + 1;
+            if (ignoreCase)
+            {
+                for (int i = Start + offset; i <= end; i++)
+                {
+                    if (MatchLowercase(text, End, i - Start))
+                    {
+                        return i; ;
+                    }
+                }
+            }
+            else
+            {
+                for (int i = Start + offset; i <= end; i++)
+                {
+                    if (Match(text, End, i - Start))
+                    {
+                        return i; ;
+                    }
+                }
+            }
+            return -1;
         }
 
         /// <summary>
-        /// Searches the specified text within this slice.
+        /// Searches for the specified character within this slice.
         /// </summary>
-        /// <param name="text">The text.</param>
-        /// <param name="offset">The offset.</param>
-        /// <returns><c>true</c> if the text was found; <c>false</c> otherwise</returns>
-        public bool Search(string text, int offset, out int index)
+        /// <returns>A value >= 0 if the character was found, otherwise &lt; 0</returns>
+        public int IndexOf(char c)
         {
-            var end = End - text.Length + 1;
-            index = Start + offset;
-            for (int i = index; i <= end; i ++)
+            for (int i = Start; i <= End; i++)
             {
-                if (Match(text, End, i))
+                if (Text[i] == c)
                 {
-                    index = i + text.Length;
-                    return true;
+                    return i;
                 }
             }
-            return false;
-        }
-
-        /// <summary>
-        /// Searches the specified text within this slice (matching lowercase).
-        /// </summary>
-        /// <param name="text">The text.</param>
-        /// <param name="offset">The offset.</param>
-        /// <returns><c>true</c> if the text was found; <c>false</c> otherwise</returns>
-        public bool SearchLowercase(string text, out int endOfIndex)
-        {
-            var end = End - text.Length + 1;
-            endOfIndex = 0;
-            for (int i = Start; i <= end; i++)
-            {
-                if (MatchLowercase(text, End, i))
-                {
-                    endOfIndex = i + text.Length;
-                    return true;
-                }
-            }
-            return false;
+            return -1;
         }
 
         /// <summary>

src/Markdig/Markdown.cs

@@ -3,6 +3,7 @@
 // See the license.txt file in the project root for more information.
 using System;
 using System.IO;
+using Markdig.Extensions.SelfPipeline;
 using Markdig.Parsers;
 using Markdig.Renderers;
 using Markdig.Syntax;
@@ -30,17 +31,19 @@ namespace Markdig
         }
 
         /// <summary>
-        /// Converts a Markdown string to HTML.
+        /// Converts a Markdown string to HTML and output to the specified writer.
         /// </summary>
         /// <param name="markdown">A Markdown text.</param>
         /// <param name="writer">The destination <see cref="TextWriter"/> that will receive the result of the conversion.</param>
         /// <param name="pipeline">The pipeline used for the conversion.</param>
+        /// <returns>The Markdown document that has been parsed</returns>
         /// <exception cref="System.ArgumentNullException">if reader or writer variable are null</exception>
-        public static void ToHtml(string markdown, TextWriter writer, MarkdownPipeline pipeline = null)
+        public static MarkdownDocument ToHtml(string markdown, TextWriter writer, MarkdownPipeline pipeline = null)
         {
             if (markdown == null) throw new ArgumentNullException(nameof(markdown));
             if (writer == null) throw new ArgumentNullException(nameof(writer));
             pipeline = pipeline ?? new MarkdownPipelineBuilder().Build();
+            pipeline = CheckForSelfPipeline(pipeline, markdown);
 
             // We override the renderer with our own writer
             var renderer = new HtmlRenderer(writer);
@@ -49,6 +52,8 @@ namespace Markdig
             var document = Parse(markdown, pipeline);
             renderer.Render(document);
             writer.Flush();
+
+            return document;
         }
 
         /// <summary>
@@ -64,6 +69,7 @@ namespace Markdig
             if (renderer == null) throw new ArgumentNullException(nameof(renderer));
             pipeline = pipeline ?? new MarkdownPipelineBuilder().Build();
 
+            pipeline = CheckForSelfPipeline(pipeline, markdown);
             var document = Parse(markdown, pipeline);
             pipeline.Setup(renderer);
             return renderer.Render(document);
@@ -93,7 +99,18 @@ namespace Markdig
             if (markdown == null) throw new ArgumentNullException(nameof(markdown));
             pipeline = pipeline ?? new MarkdownPipelineBuilder().Build();
 
+            pipeline = CheckForSelfPipeline(pipeline, markdown);
             return MarkdownParser.Parse(markdown, pipeline);
         }
+
+        private static MarkdownPipeline CheckForSelfPipeline(MarkdownPipeline pipeline, string markdown)
+        {
+            var selfPipeline = pipeline.Extensions.Find<SelfPipelineExtension>();
+            if (selfPipeline != null)
+            {
+                return selfPipeline.CreatePipelineFromInput(markdown);
+            }
+            return pipeline;
+        }
     }
 }

src/Markdig/MarkdownExtensions.cs

@@ -19,6 +19,8 @@ using Markdig.Extensions.Hardlines;
 using Markdig.Extensions.ListExtras;
 using Markdig.Extensions.Mathematics;
 using Markdig.Extensions.MediaLinks;
+using Markdig.Extensions.PragmaLines;
+using Markdig.Extensions.SelfPipeline;
 using Markdig.Extensions.SmartyPants;
 using Markdig.Extensions.Tables;
 using Markdig.Extensions.TaskLists;
@@ -58,6 +60,35 @@ namespace Markdig
                 .UseGenericAttributes(); // Must be last as it is one parser that is modifying other parsers
         }
 
+        /// <summary>
+        /// Uses the self pipeline extension that will detect the pipeline to use from the markdown input that contains a special tag. See <see cref="SelfPipelineExtension"/>
+        /// </summary>
+        /// <param name="pipeline">The pipeline.</param>
+        /// <param name="defaultTag">The default tag to use to match the self pipeline configuration. By default, <see cref="SelfPipelineExtension.DefaultTag"/>, meaning that the HTML tag will be &lt;--markdig:extensions--&gt;</param>
+        /// <param name="defaultExtensions">The default extensions to configure if no pipeline setup was found from the Markdown document</param>
+        /// <returns>The modified pipeline</returns>
+        public static MarkdownPipelineBuilder UseSelfPipeline(this MarkdownPipelineBuilder pipeline, string defaultTag = SelfPipelineExtension.DefaultTag, string defaultExtensions = null)
+        {
+            if (pipeline.Extensions.Count != 0)
+            {
+                throw new InvalidOperationException("The SelfPipeline extension cannot be used with other extensions");
+            }
+
+            pipeline.Extensions.Add(new SelfPipelineExtension(defaultTag, defaultExtensions));
+            return pipeline;
+        }
+
+        /// <summary>
+        /// Uses pragma lines to output span with an id containing the line number (pragma-line#line_number_zero_based`)
+        /// </summary>
+        /// <param name="pipeline">The pipeline.</param>
+        /// <returns>The modified pipeline</returns>
+        public static MarkdownPipelineBuilder UsePragmaLines(this MarkdownPipelineBuilder pipeline)
+        {
+            pipeline.Extensions.AddIfNotAlready<PragmaLineExtension>();
+            return pipeline;
+        }
+
         /// <summary>
         /// Uses precise source code location (useful for syntax highlighting).
         /// </summary>
@@ -143,7 +174,7 @@ namespace Markdig
         }
 
         /// <summary>
-        /// Uses the boostrap extension.
+        /// Uses the bootstrap extension.
         /// </summary>
         /// <param name="pipeline">The pipeline.</param>
         /// <returns>The modified pipeline</returns>
@@ -360,6 +391,8 @@ namespace Markdig
             {
                 switch (extension.ToLowerInvariant())
                 {
+                    case "common":
+                        break;
                     case "advanced":
                         pipeline.UseAdvancedExtensions();
                         break;
@@ -424,10 +457,10 @@ namespace Markdig
                         pipeline.UseTaskLists();
                         break;
                     default:
-                        throw new ArgumentException($"unknown extension {extension}");
+                        throw new ArgumentException($"Invalid extension `{extension}` from `{extensions}`", nameof(extensions));
                 }
             }
             return pipeline;
         }
     }
-}
+}

src/Markdig/MarkdownPipeline.cs

@@ -47,7 +47,11 @@ namespace Markdig
 
         internal ProcessDocumentDelegate DocumentProcessed;
 
-        internal void Setup(IMarkdownRenderer renderer)
+        /// <summary>
+        /// Allows to setup a <see cref="IMarkdownRenderer"/>.
+        /// </summary>
+        /// <param name="renderer">The markdown renderer to setup</param>
+        public void Setup(IMarkdownRenderer renderer)
         {
             if (renderer == null) throw new ArgumentNullException(nameof(renderer));
             foreach (var extension in Extensions)

src/Markdig/Parsers/FencedBlockParserBase.cs

@@ -216,7 +216,7 @@ namespace Markdig.Parsers
             // The line must contain only fence opening character followed only by whitespaces.
             if (count <=0 && !processor.IsCodeIndent && (c == '\0' || c.IsWhitespace()) && line.TrimEnd())
             {
-                block.Span.End = line.Start - 1;
+                block.UpdateSpanEnd(line.Start - 1);
 
                 // Don't keep the last line
                 return BlockState.BreakDiscard;

src/Markdig/Parsers/HtmlBlockParser.cs

@@ -171,51 +171,78 @@ namespace Markdig.Parsers
             return CreateHtmlBlock(state, HtmlBlockType.InterruptingBlock, startColumn, startPosition);
         }
 
+        private const string EndOfComment = "-->";
+        private const string EndOfCDATA = "]]>";
+        private const string EndOfProcessingInstruction = "?>";
+
+
         private BlockState MatchEnd(BlockProcessor state, HtmlBlock htmlBlock)
         {
             state.GoToColumn(state.ColumnBeforeIndent);
 
             // Early exit if it is not starting by an HTML tag
             var line = state.Line;
-            var c = line.CurrentChar;
             var result = BlockState.Continue;
-            int endof;
+            int index;
             switch (htmlBlock.Type)
             {
                 case HtmlBlockType.Comment:
-                    if (line.Search("-->", out endof))
+                    index = line.IndexOf(EndOfComment);
+                    if (index >= 0)
                     {
-                        htmlBlock.Span.End = endof - 1;
+                        htmlBlock.UpdateSpanEnd(index + EndOfComment.Length);
                         result = BlockState.Break;
                     }
                     break;
                 case HtmlBlockType.CData:
-                    if (line.Search("]]>", out endof))
+                    index = line.IndexOf(EndOfCDATA);
+                    if (index >= 0)
                     {
-                        htmlBlock.Span.End = endof - 1;
+                        htmlBlock.UpdateSpanEnd(index + EndOfCDATA.Length);
                         result = BlockState.Break;
                     }
                     break;
                 case HtmlBlockType.ProcessingInstruction:
-                    if (line.Search("?>", out endof))
+                    index = line.IndexOf(EndOfProcessingInstruction);
+                    if (index >= 0)
                     {
-                        htmlBlock.Span.End = endof - 1;
+                        htmlBlock.UpdateSpanEnd(index + EndOfProcessingInstruction.Length);
                         result = BlockState.Break;
                     }
                     break;
                 case HtmlBlockType.DocumentType:
-                    if (line.Search(">", out endof))
+                    index = line.IndexOf('>');
+                    if (index >= 0)
                     {
-                        htmlBlock.Span.End = endof - 1;
+                        htmlBlock.UpdateSpanEnd(index + 1);
                         result = BlockState.Break;
                     }
                     break;
                 case HtmlBlockType.ScriptPreOrStyle:
-                    if (line.SearchLowercase("</script>", out endof) || line.SearchLowercase("</pre>", out endof) || line.SearchLowercase("</style>", out endof))
+                    index = line.IndexOf("</script>", 0, true);
+                    if (index >= 0)
                     {
-                        htmlBlock.Span.End = endof - 1;
+                        htmlBlock.UpdateSpanEnd(index + "</script>".Length);
                         result = BlockState.Break;
                     }
+                    else
+                    {
+                        index = line.IndexOf("</pre>", 0, true);
+                        if (index >= 0)
+                        {
+                            htmlBlock.UpdateSpanEnd(index + "</pre>".Length);
+                            result = BlockState.Break;
+                        }
+                        else
+                        {
+                            index = line.IndexOf("</style>", 0, true);
+                            if (index >= 0)
+                            {
+                                htmlBlock.UpdateSpanEnd(index + "</style>".Length);
+                                result = BlockState.Break;
+                            }
+                        }
+                    }
                     break;
                 case HtmlBlockType.InterruptingBlock:
                     if (state.IsBlankLine)

src/Markdig/Parsers/IPostInlineProcessor.cs

@@ -6,9 +6,9 @@ using Markdig.Syntax.Inlines;
 namespace Markdig.Parsers
 {
     /// <summary>
-    /// A procesor used for <see cref="DelimiterInline"/>.
+    /// A procesor called at the end of processing all inlines.
     /// </summary>
-    public interface IDelimiterProcessor
+    public interface IPostInlineProcessor
     {
         /// <summary>
         /// Processes the delimiters.
@@ -16,10 +16,10 @@ namespace Markdig.Parsers
         /// <param name="state">The parser state.</param>
         /// <param name="root">The root inline.</param>
         /// <param name="lastChild">The last child.</param>
-        /// <param name="delimiterProcessorIndex">Index of this delimiter processor.</param>
+        /// <param name="postInlineProcessorIndex">Index of this delimiter processor.</param>
         /// <param name="isFinalProcessing"></param>
         /// <returns><c>true</c> to continue to the next delimiter processor; 
         /// <c>false</c> to stop the process (in case a processor is perfoming sub-sequent processor itself)</returns>
-        bool ProcessDelimiters(InlineProcessor state, Inline root, Inline lastChild, int delimiterProcessorIndex, bool isFinalProcessing);
+        bool PostProcess(InlineProcessor state, Inline root, Inline lastChild, int postInlineProcessorIndex, bool isFinalProcessing);
     }
 }

src/Markdig/Parsers/IndentedCodeBlockParser.cs

@@ -48,7 +48,7 @@ namespace Markdig.Parsers
             }
             if (block != null)
             {
-                block.Span.End = processor.Line.End;
+                block.UpdateSpanEnd(processor.Line.End);
             }
             return BlockState.Continue;
         }

src/Markdig/Parsers/InlineParserList.cs

@@ -20,23 +20,23 @@ namespace Markdig.Parsers
         }
 
         /// <summary>
-        /// Gets the registered delimiter processors.
+        /// Gets the registered post inline processors.
         /// </summary>
-        public IDelimiterProcessor[] DelimiterProcessors { get; private set; }
+        public IPostInlineProcessor[] PostInlineProcessors { get; private set; }
 
         public override void Initialize(InlineProcessor initState)
         {
-            // Prepare the list of delimiter processors
-            var delimiterProcessors = new List<IDelimiterProcessor>();
+            // Prepare the list of post inline processors
+            var postInlineProcessors = new List<IPostInlineProcessor>();
             foreach (var parser in this)
             {
-                var delimProcessor = parser as IDelimiterProcessor;
+                var delimProcessor = parser as IPostInlineProcessor;
                 if (delimProcessor != null)
                 {
-                    delimiterProcessors.Add(delimProcessor);
+                    postInlineProcessors.Add(delimProcessor);
                 }
             }
-            DelimiterProcessors = delimiterProcessors.ToArray();
+            PostInlineProcessors = postInlineProcessors.ToArray();
 
             base.Initialize(initState);
         }

src/Markdig/Parsers/InlineProcessor.cs

@@ -268,8 +268,8 @@ namespace Markdig.Parsers
                 leafBlock.Inline.DumpTo(DebugLog);
             }
 
-            // Process all delimiters
-            ProcessDelimiters(0, Root, null, true);
+            // PostProcess all inlines
+            PostProcessInlines(0, Root, null, true);
 
             //TransformDelimitersToLiterals();
 
@@ -281,12 +281,12 @@ namespace Markdig.Parsers
             }
         }
 
-        public void ProcessDelimiters(int startingIndex, Inline root, Inline lastChild, bool isFinalProcessing)
+        public void PostProcessInlines(int startingIndex, Inline root, Inline lastChild, bool isFinalProcessing)
         {
-            for (int i = startingIndex; i < Parsers.DelimiterProcessors.Length; i++)
+            for (int i = startingIndex; i < Parsers.PostInlineProcessors.Length; i++)
             {
-                var delimiterProcessor = Parsers.DelimiterProcessors[i];
-                if (!delimiterProcessor.ProcessDelimiters(this, root, lastChild, i, isFinalProcessing))
+                var postInlineProcessor = Parsers.PostInlineProcessors[i];
+                if (!postInlineProcessor.PostProcess(this, root, lastChild, i, isFinalProcessing))
                 {
                     break;
                 }

src/Markdig/Parsers/Inlines/EmphasisInlineParser.cs

@@ -15,8 +15,8 @@ namespace Markdig.Parsers.Inlines
     /// An inline parser for <see cref="EmphasisInline"/>.
     /// </summary>
     /// <seealso cref="Markdig.Parsers.InlineParser" />
-    /// <seealso cref="Markdig.Parsers.IDelimiterProcessor" />
-    public class EmphasisInlineParser : InlineParser, IDelimiterProcessor
+    /// <seealso cref="IPostInlineProcessor" />
+    public class EmphasisInlineParser : InlineParser, IPostInlineProcessor
     {
         private CharacterMap<EmphasisDescriptor> emphasisMap;
         private readonly DelimitersObjectCache inlinesCache;
@@ -85,7 +85,7 @@ namespace Markdig.Parsers.Inlines
             emphasisMap = new CharacterMap<EmphasisDescriptor>(tempMap);
         }
 
-        public bool ProcessDelimiters(InlineProcessor state, Inline root, Inline lastChild, int delimiterProcessorIndex, bool isFinalProcessing)
+        public bool PostProcess(InlineProcessor state, Inline root, Inline lastChild, int postInlineProcessorIndex, bool isFinalProcessing)
         {
             var container = root as ContainerInline;
             if (container == null)
@@ -225,9 +225,15 @@ namespace Markdig.Parsers.Inlines
                         for (int j = i - 1; j >= 0; j--)
                         {
                             var previousOpenDelimiter = delimiters[j];
+
+                            var isOddMatch = ((closeDelimiter.Type & DelimiterType.Open) != 0 ||
+                                             (previousOpenDelimiter.Type & DelimiterType.Close) != 0) &&
+                                             previousOpenDelimiter.DelimiterCount != closeDelimiter.DelimiterCount &&
+                                             (previousOpenDelimiter.DelimiterCount + closeDelimiter.DelimiterCount) % 3 == 0;
+
                             if (previousOpenDelimiter.DelimiterChar == closeDelimiter.DelimiterChar &&
                                 (previousOpenDelimiter.Type & DelimiterType.Open) != 0 &&
-                                previousOpenDelimiter.DelimiterCount > 0)
+                                previousOpenDelimiter.DelimiterCount > 0 && !isOddMatch)
                             {
                                 openDelimiter = previousOpenDelimiter;
                                 openDelimiterIndex = j;

src/Markdig/Parsers/Inlines/LinkInlineParser.cs

@@ -159,7 +159,7 @@ namespace Markdig.Parsers.Inlines
                 link.IsClosed = true;
 
                 // Process emphasis delimiters
-                state.ProcessDelimiters(0, link, null, false);
+                state.PostProcessInlines(0, link, null, false);
 
                 state.Inline = link;
                 isValidLink = true;
@@ -238,7 +238,7 @@ namespace Markdig.Parsers.Inlines
                             inlineState.Inline = link;
 
                             // Process emphasis delimiters
-                            inlineState.ProcessDelimiters(0, link, null, false);
+                            inlineState.PostProcessInlines(0, link, null, false);
 
                             // If we have a link (and not an image), 
                             // we also set all [ delimiters before the opening delimiter to inactive. 

src/Markdig/Parsers/Inlines/LiteralInlineParser.cs

@@ -65,13 +65,24 @@ namespace Markdig.Parsers.Inlines
 
             // The LiteralInlineParser is always matching (at least an empty string)
             var endPosition = slice.Start + length - 1;
-            processor.Inline = new LiteralInline()
+
+            var previousInline = processor.Inline as LiteralInline;
+            if (previousInline != null && ReferenceEquals(previousInline.Content.Text, slice.Text) &&
+                previousInline.Content.End + 1 == slice.Start)
             {
-                Content = length > 0 ? new StringSlice(slice.Text, slice.Start, endPosition) : StringSlice.Empty,
-                Span = new SourceSpan(startPosition, processor.GetSourcePosition(endPosition)),
-                Line = line,
-                Column = column,
-            };
+                previousInline.Content.End = endPosition;
+                previousInline.Span.End = processor.GetSourcePosition(endPosition);
+            }
+            else
+            {
+                processor.Inline = new LiteralInline()
+                {
+                    Content = length > 0 ? new StringSlice(slice.Text, slice.Start, endPosition) : StringSlice.Empty,
+                    Span = new SourceSpan(startPosition, processor.GetSourcePosition(endPosition)),
+                    Line = line,
+                    Column = column,
+                };
+            }
 
             slice.Start = nextStart;
 

src/Markdig/Parsers/ListBlockParser.cs

@@ -153,7 +153,7 @@ namespace Markdig.Parsers
                 }
 
                 // Update list-item source end position
-                listItem.Span.End = state.Line.End;
+                listItem.UpdateSpanEnd(state.Line.End);
                 
                 return BlockState.Continue;
             }
@@ -170,11 +170,11 @@ namespace Markdig.Parsers
             {
                 if (state.Indent > columWidth && state.IsCodeIndent)
                 {
-                    state.GoToColumn(columWidth);
+                    state.GoToColumn(state.ColumnBeforeIndent + columWidth);
                 }
 
                 // Update list-item source end position
-                listItem.Span.End = state.Line.End;
+                listItem.UpdateSpanEnd(state.Line.End);
 
                 return BlockState.Continue;
             }
@@ -352,11 +352,11 @@ namespace Markdig.Parsers
                 isLastListItem = false;
             }
 
-            // Update end-position for the list
-            if (listBlock.Count > 0)
-            {
-                listBlock.Span.End = listBlock[listBlock.Count - 1].Span.End;
-            }
+            //// Update end-position for the list
+            //if (listBlock.Count > 0)
+            //{
+            //    listBlock.Span.End = listBlock[listBlock.Count - 1].Span.End;
+            //}
 
             return true;
         }

src/Markdig/Parsers/ParagraphBlockParser.cs

@@ -40,7 +40,7 @@ namespace Markdig.Parsers
                 return TryParseSetexHeading(processor, block);
             }
 
-            block.Span.End = processor.Line.End;
+            block.UpdateSpanEnd(processor.Line.End);
             return BlockState.Continue;
         }
 
@@ -139,7 +139,7 @@ namespace Markdig.Parsers
                 return BlockState.BreakDiscard;
             }
 
-            block.Span.End = state.Line.End;
+            block.UpdateSpanEnd(state.Line.End);
 
             return BlockState.Continue;
         }

src/Markdig/Parsers/QuoteBlockParser.cs

@@ -61,7 +61,6 @@ namespace Markdig.Parsers
             var c = processor.CurrentChar;
             if (c != quote.QuoteChar)
             {
-                block.Span.End = processor.Start - 1;
                 return processor.IsBlankLine ? BlockState.BreakDiscard : BlockState.None;
             }
 
@@ -71,18 +70,8 @@ namespace Markdig.Parsers
                 processor.NextChar(); // Skip following space
             }
 
-            block.Span.End = processor.Line.End;
+            block.UpdateSpanEnd(processor.Line.End);
             return BlockState.Continue;
         }
-
-        public override bool Close(BlockProcessor processor, Block block)
-        {
-            var quoteBlock = block as QuoteBlock;
-            if (quoteBlock?.LastChild != null)
-            {
-                quoteBlock.Span.End = quoteBlock.LastChild.Span.End;
-            }
-            return true;
-        }
     }
 }

src/Markdig/Properties/AssemblyInfo.cs

@@ -25,6 +25,6 @@ namespace Markdig
 {
     public static partial class Markdown
     {
-        public const string Version = "0.5.3";
+        public const string Version = "0.6.2";
     }
 }

src/Markdig/Renderers/Html/HtmlAttributes.cs

@@ -44,9 +44,14 @@ namespace Markdig.Renderers.Html
             if (name == null) throw new ArgumentNullException(nameof(name));
             if (Classes == null)
             {
-                Classes = new List<string>(2); // Use half list compare to default capacity (4), as we don't expect lots of classes
+                Classes = new List<string>(2);
+                    // Use half list compare to default capacity (4), as we don't expect lots of classes
+            }
+
+            if (!Classes.Contains(name))
+            {
+                Classes.Add(name);
             }
-            Classes.Add(name);
         }
 
         /// <summary>
@@ -113,7 +118,7 @@ namespace Markdig.Renderers.Html
             }
             if (htmlAttributes.Classes == null)
             {
-                htmlAttributes.Classes = shared ? Classes : new List<string>(Classes);
+                htmlAttributes.Classes = shared ? Classes : Classes != null ? new List<string>(Classes) : null;
             }
             else if (Classes != null)
             {
@@ -122,7 +127,7 @@ namespace Markdig.Renderers.Html
 
             if (htmlAttributes.Properties == null)
             {
-                htmlAttributes.Properties = shared ? Properties : new List<KeyValuePair<string, string>>(Properties);
+                htmlAttributes.Properties = shared ? Properties : Properties != null ? new List<KeyValuePair<string, string>>(Properties) : null;
             }
             else if (Properties != null)
             {

src/Markdig/Renderers/Html/ListRenderer.cs

@@ -32,7 +32,9 @@ namespace Markdig.Renderers.Html
             }
             else
             {
-                renderer.WriteLine("<ul>");
+                renderer.Write("<ul");
+                renderer.WriteAttributes(listBlock);
+                renderer.WriteLine(">");
             }
             foreach (var item in listBlock)
             {

src/Markdig/Renderers/IMarkdownRenderer.cs

@@ -1,6 +1,8 @@
 // Copyright (c) Alexandre Mutel. All rights reserved.
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
+
+using System;
 using Markdig.Syntax;
 using Markdig.Syntax.Inlines;
 
@@ -11,6 +13,16 @@ namespace Markdig.Renderers
     /// </summary>
     public interface IMarkdownRenderer
     {
+        /// <summary>
+        /// Occurs when before writing an object.
+        /// </summary>
+        event Action<IMarkdownRenderer, MarkdownObject> ObjectWriteBefore;
+
+        /// <summary>
+        /// Occurs when after writing an object.
+        /// </summary>
+        event Action<IMarkdownRenderer, MarkdownObject> ObjectWriteAfter;
+
         /// <summary>
         /// Gets the object renderers that will render <see cref="Block"/> and <see cref="Inline"/> elements.
         /// </summary>

src/Markdig/Renderers/RendererBase.cs

@@ -35,6 +35,16 @@ namespace Markdig.Renderers
 
         public bool IsLastInContainer { get; private set; }
 
+        /// <summary>
+        /// Occurs when before writing an object.
+        /// </summary>
+        public event Action<IMarkdownRenderer, MarkdownObject> ObjectWriteBefore;
+
+        /// <summary>
+        /// Occurs when after writing an object.
+        /// </summary>
+        public event Action<IMarkdownRenderer, MarkdownObject> ObjectWriteAfter;
+
         /// <summary>
         /// Writes the children of the specified <see cref="ContainerBlock"/>.
         /// </summary>
@@ -105,6 +115,10 @@ namespace Markdig.Renderers
 
             var objectType = obj.GetType();
 
+            // Calls before writing an object
+            var writeBefore = ObjectWriteBefore;
+            writeBefore?.Invoke(this, obj);
+
             // Handle regular renderers
             IMarkdownObjectRenderer renderer = previousObjectType == objectType ? previousRenderer : null;
             if (renderer == null && !renderersPerType.TryGetValue(objectType, out renderer))
@@ -142,6 +156,10 @@ namespace Markdig.Renderers
 
             previousObjectType = objectType;
             previousRenderer = renderer;
+
+            // Calls after writing an object
+            var writeAfter = ObjectWriteAfter;
+            writeAfter?.Invoke(this, obj);
         }
     }
 }

src/Markdig/Syntax/Block.cs

@@ -75,5 +75,19 @@ namespace Markdig.Syntax
         {
             ProcessInlinesEnd?.Invoke(state, null);
         }
+
+        public void UpdateSpanEnd(int spanEnd)
+        {
+            // Update parent spans
+            var parent = this;
+            while (parent != null)
+            {
+                if (spanEnd > parent.Span.End)
+                {
+                    parent.Span.End = spanEnd;
+                }
+                parent = parent.Parent;
+            }
+        }
     }
 }

src/Markdig/Syntax/BlockExtensions.cs

@@ -0,0 +1,138 @@
+// Copyright (c) Alexandre Mutel. All rights reserved.
+// This file is licensed under the BSD-Clause 2 license. 
+// See the license.txt file in the project root for more information.
+namespace Markdig.Syntax
+{
+    /// <summary>
+    /// Extensions for <see cref="Block"/>
+    /// </summary>
+    public static class BlockExtensions
+    {
+        // TODO: Add test for this code
+
+        public static Block FindBlockAtPosition(this Block rootBlock, int position)
+        {
+            var contains = rootBlock.CompareToPosition(position) == 0;
+            var blocks = rootBlock as ContainerBlock;
+            if (blocks == null || blocks.Count == 0 || !contains)
+            {
+                return contains ? rootBlock : null;
+            }
+
+            var lowerIndex = 0;
+            var upperIndex = blocks.Count - 1;
+
+            // binary search on lines
+            Block block = null;
+            while (lowerIndex <= upperIndex)
+            {
+                int midIndex = (upperIndex - lowerIndex) / 2 + lowerIndex;
+                block = blocks[midIndex];
+                int comparison = block.CompareToPosition(position);
+                if (comparison == 0)
+                {
+                    break;
+                }
+
+                block = null;
+                if (comparison < 0)
+                    lowerIndex = midIndex + 1;
+                else
+                    upperIndex = midIndex - 1;
+            }
+
+            if (block == null)
+            {
+                return rootBlock;
+            }
+
+            // Recursively go deep into the block
+            return FindBlockAtPosition(block, position);
+        }
+
+
+        public static int FindClosestLine(this MarkdownDocument root, int line)
+        {
+            var closestBlock = root.FindClosestBlock(line);
+            return closestBlock?.Line ?? 0;
+        }
+
+        public static Block FindClosestBlock(this Block rootBlock, int line)
+        {
+            var blocks = rootBlock as ContainerBlock;
+            if (blocks == null || blocks.Count == 0)
+            {
+                return rootBlock.Line == line ? rootBlock : null;
+            }
+
+            var lowerIndex = 0;
+            var upperIndex = blocks.Count - 1;
+
+            // binary search on lines
+            while (lowerIndex <= upperIndex)
+            {
+                int midIndex = (upperIndex - lowerIndex) / 2 + lowerIndex;
+                var block = blocks[midIndex];
+                int comparison = block.Line.CompareTo(line);
+                if (comparison == 0)
+                {
+                    return block;
+                }
+                if (comparison < 0)
+                    lowerIndex = midIndex + 1;
+                else
+                    upperIndex = midIndex - 1;
+            }
+
+            // If we are between two lines, try to find the best spot
+            if (lowerIndex > 0 && lowerIndex < blocks.Count)
+            {
+                var prevBlock = blocks[lowerIndex - 1].FindClosestBlock(line) ?? blocks[lowerIndex - 1];
+                var nextBlock = blocks[lowerIndex].FindClosestBlock(line) ?? blocks[lowerIndex];
+
+                if (prevBlock.Line == line)
+                {
+                    return prevBlock;
+                }
+
+                if (nextBlock.Line == line)
+                {
+                    return nextBlock;
+                }
+
+                // we calculate the position of the current line relative to the line found and previous line
+                var prevLine = prevBlock.Line;
+                var nextLine = nextBlock.Line;
+
+                var middle = (line - prevLine) * 1.0 / (nextLine - prevLine);
+                // If  relative position < 0.5, we select the previous line, otherwise we select the line found
+                return middle < 0.5 ? prevBlock : nextBlock;
+            }
+
+            if (lowerIndex == 0)
+            {
+                var prevBlock = blocks[lowerIndex].FindClosestBlock(line) ?? blocks[lowerIndex];
+                return prevBlock;
+            }
+
+            if (lowerIndex == blocks.Count)
+            {
+                var prevBlock = blocks[lowerIndex - 1].FindClosestBlock(line) ?? blocks[lowerIndex - 1];
+                return prevBlock;
+            }
+
+            return null;
+        }
+
+
+        public static bool ContainsPosition(this Block block, int position)
+        {
+            return CompareToPosition(block, position) == 0;
+        }
+
+        public static int CompareToPosition(this Block block, int position)
+        {
+            return position < block.Span.Start ? 1 : position > block.Span.End + 1 ? -1 : 0;
+        }
+    }
+}

src/Markdig/Syntax/ContainerBlock.cs

@@ -69,10 +69,7 @@ namespace Markdig.Syntax
             children[Count++] = item;
             item.Parent = this;
 
-            if (item.Span.End > Span.End)
-            {
-                Span.End = item.Span.End;
-            }
+            UpdateSpanEnd(item.Span.End);
         }
 
         private void EnsureCapacity(int min)

src/Markdig/Syntax/MarkdownObjectExtensions.cs

@@ -19,6 +19,8 @@ namespace Markdig.Syntax
         /// <returns>An iteration over the descendant elements</returns>
         public static IEnumerable<MarkdownObject> Descendants(this MarkdownObject markdownObject)
         {
+            // TODO: implement a recursiveless method
+
             var block = markdownObject as ContainerBlock;
             if (block != null)
             {

src/Markdig/project.json

@@ -1,8 +1,8 @@
 {
   "title": "Markdig",
-  "version": "0.5.3",
+  "version": "0.6.2",
   "authors": [ "Alexandre Mutel" ],
-  "description": "A fast, powerfull, CommonMark compliant, extensible Markdown processor for .NET",
+  "description": "A fast, powerfull, CommonMark compliant, extensible Markdown processor for .NET with 20+ builtin extensions (pipetables, footnotes, definition lists... etc.)",
   "copyright": "Alexandre Mutel",
   "language": "en-US",
   "packOptions": {
@@ -11,7 +11,7 @@
     "projectUrl": "https://github.com/lunet-io/markdig",
     "iconUrl": "https://raw.githubusercontent.com/lunet-io/markdig/master/img/markdig.png",
     "requireLicenseAcceptance": false,
-    "releaseNotes": "> 0.5.3:\nFix bug in pipetables when a trailing `|` was put on the header row separator.\n> 0.5.2:\nAdd better support for precise source location for link parts (label, url...)\n> 0.5.1:\nAdd support for task lists.\nAdd support for precise source location pipelineBuilder.UsePreciseSourceLocation.\nBreaking change: Markdown.ToHtml() accept now only a string instead of a TextReader as this improve the overall performance.",
+    "releaseNotes": "> 0.6.2\n- Handle latest CommonMark specs for corner cases for emphasis (See https://talk.commonmark.org/t/emphasis-strong-emphasis-corner-cases/2123/1 )\n> 0.6.1:\n- Fix issue with autoidentifier extension overriding manual HTML attributes id on headings\n> 0.6.0\n- Fix conflicts between PipeTables and SmartyPants extensions\n- Add SelfPipeline extension\n",
     "tags": [ "Markdown CommonMark md html md2html" ]
   },
   "configurations": {