Adds link clicking support

src/models/message.vala

@@ -30,6 +30,22 @@ public class Message : Object, Comparable<Message>, Hashable<Message>
         }
     }
 
+    public string markup {
+        owned get {
+            const string link_regex_pattern = "https?:\\/\\/(www\\.)?[-a-zA-Z0-9@:%._\\+~#=]{1,256}\\.[a-z]{2,6}\\b([-a-zA-Z0-9@:%_\\+.~#?&//=]*)";
+        
+            try {
+                var regex = new GLib.Regex(link_regex_pattern);
+    
+                var escaped_text = GLib.Markup.escape_text(this.text);
+                return regex.replace(escaped_text, escaped_text.length, 0, "<u>\\0</u>");
+            } catch (GLib.RegexError e) {
+                GLib.warning("Error linking text: %s", e.message);
+                return GLib.Markup.escape_text(this.text);
+            }
+        }
+    }
+
     public Message(string text, DateTime date, string? sender) {
         this.text = text;
         this.date = date;

src/transcript/layouts/text-bubble-layout.vala

@@ -24,7 +24,8 @@ public class TextBubbleLayout : BubbleLayout
         this.from_me = message.from_me;
         this.message = message;
 
-        layout = parent.create_pango_layout(message.text);
+        layout = parent.create_pango_layout(null);
+        layout.set_markup(message.markup, -1);
 
         var font_desc = TextBubbleLayout.body_font;
         layout.set_font_description(font_desc);

src/transcript/transcript-view.vala

@@ -50,6 +50,7 @@ public class TranscriptView : Adw.Bin
     private Graphene.Point _hovering_text_view_origin = Graphene.Point() { x = 0, y = 0 };
     private TextView _hovering_text_view = new TextView();
 
+    private bool _queued_url_open = false;
     private VisibleTextLayout? hovered_text_bubble = null;
     private VisibleTextLayout? locked_text_bubble = null;
 
@@ -103,7 +104,8 @@ public class TranscriptView : Adw.Bin
 
         // When the selection changes, lock the text bubble so that if the cursor moves to another bubble we don't clear it. 
         _hovering_text_view.buffer.mark_set.connect((location, end) => {
-            self.lock_text_bubble(self.hovered_text_bubble);
+            if (location.get_offset() == 0) { return; }
+            self.on_hovering_text_view_clicked(location, end);
         });
 
         // When the mouse hovers over a text bubble, configure the hovering text view to show the text of the bubble.
@@ -152,6 +154,53 @@ public class TranscriptView : Adw.Bin
         });
     }
 
+    private void on_hovering_text_view_clicked(TextIter location, TextMark end) {
+        lock_text_bubble(hovered_text_bubble);
+
+        if (!_queued_url_open) {
+            _queued_url_open = true;
+
+            // 100ms timeout to let the selection state settle. (this is a workaround)
+            GLib.Timeout.add(100, () => {
+                open_url_at_location(location);
+                _queued_url_open = false;
+                return false;
+            }, GLib.Priority.HIGH);
+        }
+    }
+
+    private void open_url_at_location(TextIter location) {
+        Gtk.TextTag? underline_tag = null;
+        foreach (unowned Gtk.TextTag tag in location.get_tags()) {
+            if (tag.underline != Pango.Underline.NONE) {
+                underline_tag = tag;
+                break;
+            }
+        }
+
+        if (underline_tag == null) {
+            return; // Click wasn't on an underlined (i.e. link) region
+        }
+
+        // Determine the full extent (start/end iters) of this underlined region
+        Gtk.TextIter start_iter = location;
+        Gtk.TextIter end_iter = location;
+        start_iter.backward_to_tag_toggle(underline_tag);
+        end_iter.forward_to_tag_toggle(underline_tag);
+
+        string url = _hovering_text_view.buffer.get_text(start_iter, end_iter, false);
+
+        // Try to open the URL – guard against malformed data
+        if (url != null && url.strip().length > 0) {
+            try {
+                GLib.AppInfo.launch_default_for_uri(url.strip(), null);
+            } catch (GLib.Error e) {
+                warning("Failed to open URL %s: %s", url, e.message);
+            }
+        }
+    }
+    
+
     private void reset_for_conversation_change() {
         locked_text_bubble = null;
         hovered_text_bubble = null;
@@ -176,7 +225,11 @@ public class TranscriptView : Adw.Bin
 
         if (locked_text_bubble == null) {
             _hovering_text_view_origin = visible_text_layout.text_bubble.get_text_origin();
-            _hovering_text_view.buffer.text = visible_text_layout.text_bubble.message.text;
+
+            _hovering_text_view.buffer.text = "";
+            Gtk.TextIter start_iter;
+            _hovering_text_view.buffer.get_start_iter(out start_iter);
+            _hovering_text_view.buffer.insert_markup(ref start_iter, visible_text_layout.text_bubble.message.markup, -1);
             overlay.queue_allocate();
         }
     }