LanguageClient: Allow clients to provide extra tabs for inspector

Change-Id: I530eca50393289dbf85fb0088d2a62c2729d28b2
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/languageclient/client.h

@@ -62,6 +62,7 @@
 #include <QTextCursor>
 
 #include <unordered_map>
+#include <utility>
 
 namespace Core { class IDocument; }
 namespace ProjectExplorer { class Project; }
@@ -72,6 +73,10 @@ class TextDocument;
 class TextEditorWidget;
 }
 
+QT_BEGIN_NAMESPACE
+class QWidget;
+QT_END_NAMESPACE
+
 namespace LanguageClient {
 
 class BaseClientInterface;
@@ -196,6 +201,11 @@ public:
     void log(const LanguageServerProtocol::ResponseError<Error> &responseError) const
     { log(responseError.toString()); }
 
+    // Caller takes ownership.
+    using CustomInspectorTab = std::pair<QWidget *, QString>;
+    using CustomInspectorTabs = QList<CustomInspectorTab>;
+    virtual const CustomInspectorTabs createCustomInspectorTabs() { return {}; }
+
 signals:
     void initialized(const LanguageServerProtocol::ServerCapabilities &capabilities);
     void capabilitiesChanged(const DynamicCapabilities &capabilities);