sample, add thematic break bottom margin sample

app-sample/samples.json

@@ -1,4 +1,16 @@
 [
+  {
+    "javaClassName": "io.noties.markwon.app.samples.ThematicBreakBottomMarginSample",
+    "id": "20200813154415",
+    "title": "Thematic break bottom margin",
+    "description": "Do not add a new line after thematic break (with the `BlockHandler`)",
+    "artifacts": [
+      "CORE"
+    ],
+    "tags": [
+      "rendering"
+    ]
+  },
   {
     "javaClassName": "io.noties.markwon.app.samples.RedditSpoilerSample",
     "id": "20200813145316",
@@ -822,12 +834,13 @@
     ]
   },
   {
-    "javaClassName": "io.noties.markwon.app.samples.GithubUserIssueOnTextAddedSample",
+    "javaClassName": "io.noties.markwon.app.samples.GithubUserIssueInlineParsingSample",
     "id": "20200629162024",
     "title": "User mention and issue (via text)",
     "description": "Github-like user mention and issue rendering via `CorePlugin.OnTextAddedListener`",
     "artifacts": [
-      "CORE"
+      "CORE",
+      "INLINE_PARSER"
     ],
     "tags": [
       "parsing",
@@ -836,13 +849,12 @@
     ]
   },
   {
-    "javaClassName": "io.noties.markwon.app.samples.GithubUserIssueInlineParsingSample",
+    "javaClassName": "io.noties.markwon.app.samples.GithubUserIssueOnTextAddedSample",
     "id": "20200629162024",
     "title": "User mention and issue (via text)",
     "description": "Github-like user mention and issue rendering via `CorePlugin.OnTextAddedListener`",
     "artifacts": [
-      "CORE",
+      "CORE"
-      "INLINE_PARSER"
     ],
     "tags": [
       "parsing",

app-sample/src/main/java/io/noties/markwon/app/samples/ThematicBreakBottomMarginSample.java

@@ -0,0 +1,63 @@
+package io.noties.markwon.app.samples;
+
+import androidx.annotation.NonNull;
+
+import org.commonmark.node.Node;
+import org.commonmark.node.ThematicBreak;
+
+import io.noties.markwon.AbstractMarkwonPlugin;
+import io.noties.markwon.BlockHandlerDef;
+import io.noties.markwon.Markwon;
+import io.noties.markwon.MarkwonVisitor;
+import io.noties.markwon.app.sample.Tags;
+import io.noties.markwon.app.sample.ui.MarkwonTextViewSample;
+import io.noties.markwon.sample.annotations.MarkwonArtifact;
+import io.noties.markwon.sample.annotations.MarkwonSampleInfo;
+
+@MarkwonSampleInfo(
+  id = "20200813154415",
+  title = "Thematic break bottom margin",
+  description = "Do not add a new line after thematic break (with the `BlockHandler`)",
+  artifacts = MarkwonArtifact.CORE,
+  tags = Tags.rendering
+)
+public class ThematicBreakBottomMarginSample extends MarkwonTextViewSample {
+  @Override
+  public void render() {
+    final String md = "" +
+      "# Thematic break and margin\n\n" +
+      "So, what if....\n\n" +
+      "---\n\n" +
+      "And **now**";
+
+    final Markwon markwon = Markwon.builder(context)
+      .usePlugin(new AbstractMarkwonPlugin() {
+        @Override
+        public void configureVisitor(@NonNull MarkwonVisitor.Builder builder) {
+          builder.blockHandler(new BlockHandlerDef() {
+            @Override
+            public void blockStart(@NonNull MarkwonVisitor visitor, @NonNull Node node) {
+              // also can control block start
+              super.blockStart(visitor, node);
+            }
+
+            @Override
+            public void blockEnd(@NonNull MarkwonVisitor visitor, @NonNull Node node) {
+              if (visitor.hasNext(node)) {
+                visitor.ensureNewLine();
+
+                // thematic break won't have a new line
+                // similarly you can control other blocks
+                if (!(node instanceof ThematicBreak)) {
+                  visitor.forceNewLine();
+                }
+              }
+            }
+          });
+        }
+      })
+      .build();
+
+    markwon.setMarkdown(textView, md);
+  }
+}