Core: Register mimetype of softload plugin

Change-Id: I81713d951caaf4e2d97fa1a58c4f512a280af351
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/coreplugin/coreplugin.cpp

@@ -126,17 +126,22 @@ CoreArguments parseArguments(const QStringList &arguments)
     return args;
 }
 
+void CorePlugin::loadMimeFromPlugin(const ExtensionSystem::PluginSpec *plugin)
+{
+    const QJsonObject metaData = plugin->metaData();
+    const QJsonValue mimetypes = metaData.value("Mimetypes");
+    QString mimetypeString;
+    if (Utils::readMultiLineString(mimetypes, &mimetypeString))
+        Utils::addMimeTypes(plugin->name() + ".mimetypes", mimetypeString.trimmed().toUtf8());
+}
+
 bool CorePlugin::initialize(const QStringList &arguments, QString *errorMessage)
 {
     // register all mime types from all plugins
     for (ExtensionSystem::PluginSpec *plugin : ExtensionSystem::PluginManager::plugins()) {
         if (!plugin->isEffectivelyEnabled())
             continue;
-        const QJsonObject metaData = plugin->metaData();
-        const QJsonValue mimetypes = metaData.value("Mimetypes");
-        QString mimetypeString;
-        if (Utils::readMultiLineString(mimetypes, &mimetypeString))
-            Utils::addMimeTypes(plugin->name() + ".mimetypes", mimetypeString.trimmed().toUtf8());
+        loadMimeFromPlugin(plugin);
     }
 
     if (ThemeEntry::availableThemes().isEmpty()) {

src/plugins/coreplugin/coreplugin.h

@@ -7,6 +7,7 @@
 #include <qglobal.h>
 
 #include <extensionsystem/iplugin.h>
+#include <extensionsystem/pluginspec.h>
 #include <utils/environment.h>
 
 #include <memory>
@@ -54,6 +55,8 @@ public:
     static void setEnvironmentChanges(const Utils::EnvironmentItems &changes);
     static QString msgCrashpadInformation();
 
+    static void loadMimeFromPlugin(const ExtensionSystem::PluginSpec *plugin);
+
 public slots:
     void fileOpenRequest(const QString &);
 

src/plugins/coreplugin/plugindialog.cpp

@@ -3,6 +3,7 @@
 
 #include "plugindialog.h"
 
+#include "coreplugin.h"
 #include "coreplugintr.h"
 #include "dialogs/restartdialog.h"
 #include "icore.h"
@@ -87,8 +88,10 @@ void PluginDialog::closeDialog()
 {
     PluginManager::writeSettings();
 
-    for (PluginSpec *plugin : m_softLoad)
+    for (PluginSpec *plugin : m_softLoad) {
         PluginManager::loadPlugin(plugin);
+        CorePlugin::loadMimeFromPlugin(plugin);
+    }
 
     if (m_isRestartRequired) {
         RestartDialog restartDialog(ICore::dialogParent(),