From 047086f5e50ba5a3232be5c75c0f4d8ee931dd0e Mon Sep 17 00:00:00 2001
From: Thomas <tschneider.ac@gmail.com>
Date: Tue, 22 Nov 2022 15:27:13 +0100
Subject: [PATCH] Fix issue #510 - Add support for gemini links

---
 .../app/fedilab/android/helper/Helper.java    |  2 ++
 .../android/helper/SpannableHelper.java       | 33 +++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/app/src/main/java/app/fedilab/android/helper/Helper.java b/app/src/main/java/app/fedilab/android/helper/Helper.java
index 5277dbb73..7e45b21f2 100644
--- a/app/src/main/java/app/fedilab/android/helper/Helper.java
+++ b/app/src/main/java/app/fedilab/android/helper/Helper.java
@@ -334,6 +334,8 @@ public class Helper {
     public static final Pattern bibliogramPattern = Pattern.compile("(m\\.|www\\.)?instagram.com(/p/[\\w-/]+)");
     public static final Pattern libredditPattern = Pattern.compile("(www\\.|m\\.)?(reddit\\.com|preview\\.redd\\.it|i\\.redd\\.it|redd\\.it)/(((?!([\"'<])).)*)");
     public static final Pattern ouichesPattern = Pattern.compile("https?://ouich\\.es/tag/(\\w+)");
+
+    public static final Pattern geminiPattern = Pattern.compile("(gemini://.*)\\b");
     public static final Pattern xmppPattern = Pattern.compile("xmpp:[-a-zA-Z0-9+$&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]");
     public static final Pattern peertubePattern = Pattern.compile("(https?://([\\da-z.-]+\\.[a-z.]{2,10}))/videos/watch/(\\w{8}-\\w{4}-\\w{4}-\\w{4}-\\w{12})$");
     public static final Pattern mediumPattern = Pattern.compile("([\\w@-]*)?\\.?medium.com/@?([/\\w-]+)");
diff --git a/app/src/main/java/app/fedilab/android/helper/SpannableHelper.java b/app/src/main/java/app/fedilab/android/helper/SpannableHelper.java
index cdf65612b..6418f1dce 100644
--- a/app/src/main/java/app/fedilab/android/helper/SpannableHelper.java
+++ b/app/src/main/java/app/fedilab/android/helper/SpannableHelper.java
@@ -147,6 +147,7 @@ public class SpannableHelper {
             linkify(context, content, urlDetails);
             linkifyURL(context, content, urlDetails);
             emails(context, content);
+            gemini(context, content);
             replaceQuoteSpans(context, content);
         } else {
             content = new SpannableStringBuilder(text);
@@ -668,6 +669,38 @@ public class SpannableHelper {
         }
     }
 
+    private static void gemini(Context context, Spannable content) {
+        // --- For all patterns defined in Helper class ---
+        Pattern pattern = Helper.geminiPattern;
+        Matcher matcher = pattern.matcher(content);
+        while (matcher.find()) {
+            int matchStart = matcher.start();
+            int matchEnd = matcher.end();
+            String geminiLink = content.toString().substring(matchStart, matchEnd);
+            if (matchStart >= 0 && matchEnd <= content.toString().length() && matchEnd >= matchStart) {
+                ClickableSpan[] clickableSpans = content.getSpans(matchStart, matchEnd, ClickableSpan.class);
+                if (clickableSpans != null) {
+                    for (ClickableSpan clickableSpan : clickableSpans) {
+                        content.removeSpan(clickableSpan);
+                    }
+                }
+                content.removeSpan(clickableSpans);
+                content.setSpan(new ClickableSpan() {
+                    @Override
+                    public void onClick(@NonNull View textView) {
+                        Helper.openBrowser(context, geminiLink);
+                    }
+
+                    @Override
+                    public void updateDrawState(@NonNull TextPaint ds) {
+                        super.updateDrawState(ds);
+                        ds.setUnderlineText(false);
+                        ds.setColor(linkColor);
+                    }
+                }, matchStart, matchEnd, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
+            }
+        }
+    }
 
     private static void emails(Context context, Spannable content) {
         // --- For all patterns defined in Helper class ---