From fa1eb649773c0e4042b4a11a494c97a4e3909404 Mon Sep 17 00:00:00 2001
From: Calvin Morrison <calvin@pobox.com>
Date: Mon, 18 Nov 2024 13:22:20 +0900
Subject: Format url links in event descriptions making them clickable

This allows to click through links in events in description fields
wherever the description field is displayed from libkcal.
This is useful since links to virtual meetings are often attached in the
description field in recent years

Signed-off-by: Calvin Morrison <calvin@pobox.com>
Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit 8c9259947084d6e77a74d8eeb1504fe7cbd7626f)
---
 libkcal/incidenceformatter.cpp | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/libkcal/incidenceformatter.cpp b/libkcal/incidenceformatter.cpp
index 785a681bd..887d000aa 100644
--- a/libkcal/incidenceformatter.cpp
+++ b/libkcal/incidenceformatter.cpp
@@ -575,9 +575,22 @@ static TQString displayViewFormatEvent( Calendar *calendar, Event *event,
   }
 
   if ( !event->description().isEmpty() ) {
+    TQString description = event->description();
+
+    // Regular expression to match URLs
+    TQRegExp urlRegex("https?://[^\\s]+");
+
+    int pos = 0;
+    while ((pos = urlRegex.search(description, pos)) != -1) {
+      TQString url = urlRegex.cap(0);
+      TQString link = "<a href=\"" + url + "\">" + url + "</a>";
+      description.replace(pos, url.length(), link);
+      pos += link.length();
+    }
+
     tmpStr += "<tr>";
     tmpStr += "<td><b>" + i18n( "Description:" ) + "</b></td>";
-    tmpStr += "<td>" + event->description() + "</td>";
+    tmpStr += "<td>" + description + "</td>";
     tmpStr += "</tr>";
   }
 
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