Fix link text being escaped when a tag contains an img tag

Author: mysticmind

src/ReverseMarkdown.Test/ConverterTests.cs

@@ -1320,5 +1320,13 @@ public void WhenBoldTagContainsBRTag_ThenConvertToMarkdown()
             var expected = $"test**  {Environment.NewLine}test**";
             CheckConversion(html, expected);
         }
+        
+        [Fact]
+        public void WhenAnchorTagContainsImgTag_LinkTextShouldNotBeEscaped()
+        {
+            const string html = "<a href=\"https://www.example.com\"><img src=\"https://example.com/image.jpg\"/></a>";
+            var expected = $"[![](https://example.com/image.jpg)](https://www.example.com)";
+            CheckConversion(html, expected);
+        }
     }
 }

src/ReverseMarkdown/Converters/A.cs

@@ -1,5 +1,6 @@
 using HtmlAgilityPack;
 using System;
+using System.Linq;
 
 namespace ReverseMarkdown.Converters {
     public class A : ConverterBase
@@ -14,6 +15,8 @@ public override string Convert(HtmlNode node)
         {
             var name = TreatChildren(node).Trim();
 
+            var hasSingleChildImgNode = node.ChildNodes.Count == 1 && node.ChildNodes.Count(n => n.Name.Contains("img")) == 1;
+
             var href = node.GetAttributeValue("href", string.Empty).Trim().Replace("(", "%28").Replace(")", "%29").Replace(" ", "%20");
             var title = ExtractTitle(node);
             title = title.Length > 0 ? $" \"{title}\"" : "";
@@ -41,7 +44,10 @@ public override string Convert(HtmlNode node)
                                                         (scheme.Equals("http", StringComparison.OrdinalIgnoreCase) || scheme.Equals("https", StringComparison.OrdinalIgnoreCase))
                                                         && string.Equals(href, $"{scheme}://{name}", StringComparison.OrdinalIgnoreCase);
 
-                return useHrefWithHttpWhenNameHasNoScheme ? href : $"[{StringUtils.EscapeLinkText(name)}]({href}{title})";
+                // if the anchor tag contains a single child image node don't escape the link text
+                var linkText = hasSingleChildImgNode ? name : StringUtils.EscapeLinkText(name);
+
+                return useHrefWithHttpWhenNameHasNoScheme ? href : $"[{linkText}]({href}{title})";
             }
 		}
 	}