From d2e4730179e6fd9d7600c368d48cf524920bf158 Mon Sep 17 00:00:00 2001
From: Dimitry Ivanov <di@noties.io>
Date: Thu, 14 Nov 2019 16:19:02 +0300
Subject: [PATCH] Add inline processor to custom extension sample

---
 .../CustomExtensionActivity2.java             | 97 ++++++++++++++++++-
 1 file changed, 93 insertions(+), 4 deletions(-)

diff --git a/sample/src/main/java/io/noties/markwon/sample/customextension2/CustomExtensionActivity2.java b/sample/src/main/java/io/noties/markwon/sample/customextension2/CustomExtensionActivity2.java
index 735d6c0c..65b71800 100644
--- a/sample/src/main/java/io/noties/markwon/sample/customextension2/CustomExtensionActivity2.java
+++ b/sample/src/main/java/io/noties/markwon/sample/customextension2/CustomExtensionActivity2.java
@@ -8,6 +8,9 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
 import org.commonmark.node.Link;
+import org.commonmark.node.Text;
+import org.commonmark.parser.InlineParserFactory;
+import org.commonmark.parser.Parser;
 
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -20,6 +23,8 @@ import io.noties.markwon.RenderProps;
 import io.noties.markwon.SpannableBuilder;
 import io.noties.markwon.core.CorePlugin;
 import io.noties.markwon.core.CoreProps;
+import io.noties.markwon.inlineparser.InlineProcessor;
+import io.noties.markwon.inlineparser.MarkwonInlineParser;
 import io.noties.markwon.sample.R;
 
 public class CustomExtensionActivity2 extends Activity {
@@ -35,6 +40,20 @@ public class CustomExtensionActivity2 extends Activity {
         // * `#1` - an issue or a pull request
         // * `@user` link to a user
 
+
+        final String md = "# Custom Extension 2\n" +
+                "\n" +
+                "This is an issue #1\n" +
+                "Done by @noties";
+
+
+//        inline_parsing(textView, md);
+
+        text_added(textView, md);
+    }
+
+    private void text_added(@NonNull TextView textView, @NonNull String md) {
+
         final Markwon markwon = Markwon.builder(this)
                 .usePlugin(new AbstractMarkwonPlugin() {
                     @Override
@@ -45,14 +64,84 @@ public class CustomExtensionActivity2 extends Activity {
                 })
                 .build();
 
-        final String md = "# Custom Extension 2\n" +
-                "\n" +
-                "This is an issue #1\n" +
-                "Done by @noties";
+        markwon.setMarkdown(textView, md);
+    }
+
+    private void inline_parsing(@NonNull TextView textView, @NonNull String md) {
+
+        final InlineParserFactory inlineParserFactory = MarkwonInlineParser.factoryBuilder()
+                // include all current defaults (otherwise will be empty - contain only our inline-processors)
+                .includeDefaults()
+                .addInlineProcessor(new IssueInlineProcessor())
+                .addInlineProcessor(new UserInlineProcessor())
+                .build();
+
+        final Markwon markwon = Markwon.builder(this)
+                .usePlugin(new AbstractMarkwonPlugin() {
+                    @Override
+                    public void configureParser(@NonNull Parser.Builder builder) {
+                        builder.inlineParserFactory(inlineParserFactory);
+                    }
+                })
+                .build();
 
         markwon.setMarkdown(textView, md);
     }
 
+    private static class IssueInlineProcessor extends InlineProcessor {
+
+        private static final Pattern RE = Pattern.compile("\\d+");
+
+        @Override
+        public char specialCharacter() {
+            return '#';
+        }
+
+        @Override
+        protected boolean parse() {
+            final String id = match(RE);
+            if (id != null) {
+                final Link link = new Link(createIssueOrPullRequestLinkDestination(id), null);
+                link.appendChild(new Text("#" + id));
+                appendNode(link);
+                return true;
+            }
+            return false;
+        }
+
+        @NonNull
+        private static String createIssueOrPullRequestLinkDestination(@NonNull String id) {
+            return "https://github.com/noties/Markwon/issues/" + id;
+        }
+    }
+
+    private static class UserInlineProcessor extends InlineProcessor {
+
+        private static final Pattern RE = Pattern.compile("\\w+");
+
+        @Override
+        public char specialCharacter() {
+            return '@';
+        }
+
+        @Override
+        protected boolean parse() {
+            final String user = match(RE);
+            if (user != null) {
+                final Link link = new Link(createUserLinkDestination(user), null);
+                link.appendChild(new Text("@" + user));
+                appendNode(link);
+                return true;
+            }
+            return false;
+        }
+
+        @NonNull
+        private static String createUserLinkDestination(@NonNull String user) {
+            return "https://github.com/" + user;
+        }
+    }
+
     private static class GithubLinkifyRegexTextAddedListener implements CorePlugin.OnTextAddedListener {
 
         private static final Pattern PATTERN = Pattern.compile("((#\\d+)|(@\\w+))", Pattern.MULTILINE);