Simplify Markdown top-level api

src/Testamina.Markdig.Benchmarks/Program.cs

@@ -28,11 +28,11 @@ namespace Testamina.Markdig.Benchmarks
         public void TestMarkdig()
         {
             //var reader = new StreamReader(File.Open("spec.md", FileMode.Open));
-            Markdown.ConvertToHtml(text);
+            Markdown.Convert(text);
             //File.WriteAllText("spec.html", writer.ToString());
         }
 
-        [Benchmark]
+        //[Benchmark]
         public void TestCommonMark()
         {
             ////var reader = new StreamReader(File.Open("spec.md", FileMode.Open));
@@ -73,7 +73,7 @@ namespace Testamina.Markdig.Benchmarks
             {
                 var clock = Stopwatch.StartNew();
                 var program = new Program();
-                for (int i = 0; i < 500; i++)
+                for (int i = 0; i < 1000; i++)
                 {
                     if (markdig)
                     {

src/Textamina.Markdig.Tests/TestParser.cs

@@ -28,7 +28,7 @@ namespace Textamina.Markdig.Tests
 //            var reader = new StringReader(@"> > toto tata
 //> titi toto
 //");
-            var result = Markdown.ConvertToHtml(reader);
+            var result = Markdown.Convert(reader);
             Console.WriteLine(result);
         }
 
@@ -38,7 +38,7 @@ namespace Textamina.Markdig.Tests
             MarkdownParser.Log = Console.Out;
             var reader = new StringReader(inputText);
             var output = new StringWriter();
-            Markdown.ConvertToHtml(reader, output);
+            Markdown.Convert(reader, output);
 
             var result = Compact(output.ToString());
             expectedOutputText = Compact(expectedOutputText);

src/Textamina.Markdig.Tests/TestTableParser.cs

@@ -22,7 +22,7 @@ namespace Textamina.Markdig.Tests
 //> titi toto
 //");
 
-            var result = Markdown.ConvertToHtml(reader);
+            var result = Markdown.Convert(reader);
             Console.WriteLine(result);
         }
    }

src/Textamina.Markdig/Markdown.cs

@@ -8,34 +8,40 @@ namespace Textamina.Markdig
 {
     public class Markdown
     {
-        public static string ConvertToHtml(string markdown)
+        public static string Convert(string markdown)
         {
             if (markdown == null) throw new ArgumentNullException(nameof(markdown));
             var reader = new StringReader(markdown);
-            var writer = new StringWriter();
-            ConvertToHtml(reader, writer);
-            return writer.ToString();
+            return Convert(reader)?.ToString() ?? string.Empty;
         }
 
-        public static string ConvertToHtml(StringReader reader)
+        public static object Convert(TextReader reader, MarkdownPipeline pipeline = null)
         {
             if (reader == null) throw new ArgumentNullException(nameof(reader));
-            var writer = new StringWriter();
-            ConvertToHtml(reader, writer);
-            return writer.ToString();
+            pipeline = pipeline ?? new MarkdownPipeline();
+
+            if (pipeline.Renderer == null)
+            {
+                pipeline.Renderer = new HtmlMarkdownRenderer(new StringWriter());
+            }
+
+            var document = Parse(reader, pipeline);
+            return pipeline.Renderer.WriteDocument(document);
         }
 
-        public static void ConvertToHtml(TextReader reader, TextWriter writer, MarkdownPipeline pipeline = null)
+        public static void Convert(TextReader reader, TextWriter writer, MarkdownPipeline pipeline = null)
         {
             if (reader == null) throw new ArgumentNullException(nameof(reader));
             if (writer == null) throw new ArgumentNullException(nameof(writer));
             pipeline = pipeline ?? new MarkdownPipeline();
+
             if (!(pipeline.Renderer is HtmlMarkdownRenderer))
             {
                 pipeline.Renderer = new HtmlMarkdownRenderer(writer);
             }
 
-            Convert(reader, writer, pipeline);
+            var document = Parse(reader, pipeline);
+            pipeline.Renderer.WriteChildren(document);
             writer.Flush();
         }
 
@@ -44,10 +50,10 @@ namespace Textamina.Markdig
             return Parse(new StringReader(markdown), new MarkdownPipeline());
         }
 
-        public static Document Parse(TextReader input, MarkdownPipeline pipeline)
+        public static Document Parse(TextReader input, MarkdownPipeline pipeline = null)
         {
             if (input == null) throw new ArgumentNullException(nameof(input));
-            if (pipeline == null) throw new ArgumentNullException(nameof(pipeline));
+            pipeline = pipeline ?? new MarkdownPipeline();
 
             BlockParserState blockParserState;
             InlineParserState inlineParserState;
@@ -56,16 +62,5 @@ namespace Textamina.Markdig
             var markdownParser = new MarkdownParser(input, blockParserState, inlineParserState);
             return markdownParser.Parse();
         }
-
-        public static void Convert(TextReader reader, TextWriter writer, MarkdownPipeline pipeline)
-        {
-            if (reader == null) throw new ArgumentNullException(nameof(reader));
-            if (writer == null) throw new ArgumentNullException(nameof(writer));
-            if (pipeline == null) throw new ArgumentNullException(nameof(pipeline));
-
-            var document = Parse(reader, pipeline);
-            pipeline.Renderer.WriteChildren(document);
-            writer.Flush();
-        }
     }
 }

src/Textamina.Markdig/Renderers/HtmlMarkdownRenderer.cs

@@ -283,5 +283,11 @@ namespace Textamina.Markdig.Renderers
             }
             return this;
         }
+
+        public override object WriteDocument(Document document)
+        {
+            WriteChildren(document);
+            return textWriter;
+        }
     }
 }

src/Textamina.Markdig/Renderers/MarkdownRenderer.cs

@@ -19,6 +19,8 @@ namespace Textamina.Markdig.Renderers
 
         public List<MarkdownObjectRenderer> Renderers { get; }
 
+        public abstract object WriteDocument(Document document);
+
         public void WriteChildren(ContainerBlock containerBlock)
         {
             if (containerBlock == null)