Help: support qt-6 online documentation

Last segment of host part represents version string.
e.g. qthelp://org.qt-project.qtwidgets.630/...

If it starts with "6", let's open qt-6 documentation.
Otherwise, let's open qt-5 as it is.

Change-Id: I88b5f6bd2ebfd8494e48f043678dbc190310b90f
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

1 files changed, 15 insertions, 3 deletions

diff --git a/src/plugins/help/localhelpmanager.cpp b/src/plugins/help/localhelpmanager.cpp
index 49d09d2885..99c73c200d 100644
--- a/src/plugins/help/localhelpmanager.cpp
+++ b/src/plugins/help/localhelpmanager.cpp
@@ -589,10 +589,22 @@ bool LocalHelpManager::openOnlineHelp(const QUrl &url)
 
     if (canOpenOnlineHelp(url)) {
         QString urlPrefix = "http://doc.qt.io/";
-        if (url.authority().startsWith(unversionedLocalDomainName))
+        if (url.authority().startsWith(unversionedLocalDomainName)) {
             urlPrefix.append(Core::Constants::IDE_ID);
-        else
-            urlPrefix.append("qt-5");
+        } else {
+            const auto host = url.host();
+            const auto dot = host.lastIndexOf('.');
+            if (dot < 0) {
+                urlPrefix.append("qt-5");
+            } else {
+                const auto version = host.mid(dot + 1);
+                if (version.startsWith('6')) {
+                    urlPrefix.append("qt-6");
+                } else {
+                    urlPrefix.append("qt-5");
+                }
+            }
+        }
         const QString address = url.toString();
         QDesktopServices::openUrl(QUrl(urlPrefix + address.mid(address.lastIndexOf(QLatin1Char('/')))));
         return true;