Initial commit

Lts/Common/LtsPluginManager/lts_plugin_loader.h

@@ -0,0 +1,92 @@
+/**
+ * @RDE_HEADER@
+ * plugin loader helper function
+ * $Id$
+ * $HeadURL$
+ * $Author$
+ *
+ * Created by Christian Ehrlicher, SLSE, 2016-07-07
+ */
+
+#pragma once
+
+#define PLUGIN_LOADER_VERSION 3
+
+#include <qglobal.h>
+#include <functional>
+#include <QMap>
+#include <QPair>
+
+#ifndef LTSPLUGINLOADER_EXPORT
+# ifdef BUILD_STATIC_LIBRARIES
+#  define LTSPLUGINLOADER_EXPORT
+# else
+#  if defined(MAKE_LTSPLUGINLOADER_LIB)
+#   define LTSPLUGINLOADER_EXPORT Q_DECL_EXPORT
+#  else
+#   define LTSPLUGINLOADER_EXPORT Q_DECL_IMPORT
+#  endif
+# endif
+#endif
+
+class QObject;
+class QPluginLoader;
+
+namespace LtsAppDescriptor
+{
+struct AppDescription;
+}
+
+namespace LtsPluginManager
+{
+
+enum class PluginType
+{
+  UNKNOWN = 0, // should not happen
+  DATA, // 1
+  GUI, // 2
+  TOPIC_TYPE,
+  PROJECT,
+  STYLE,
+  SPECIAL, // TODO: rm
+};
+
+
+struct PluginInstance // one instance for one plugin
+{
+  QString pluginName;
+  QString fullFileName;
+  QString fileName;
+  QObject *plugin = nullptr;
+  QPluginLoader *pluginLoader = nullptr;
+};
+
+
+class LTSPLUGINLOADER_EXPORT LtsPluginLoader
+{
+public:
+  static LtsPluginLoader *getInstance();
+
+  void unloadAllPlugins();
+
+  void checkPlugins(const QVector<LtsAppDescriptor::AppDescription> &appVector,
+                    QStringList &errors /* out */);
+
+  bool loadPlugins(PluginType requestedPluginType,
+                   const std::function<bool(const PluginInstance &pluginInstance)> &loadPlugin,
+                   const QStringList &requiredPlugins = QStringList(), /* leave empty to get all plugins of the given type */
+                   const QString &specialTopicTypeFilter = QString(),
+                   const QStringList &optionalPlugins = QStringList());
+
+  typedef QPair<PluginType, QString> PluginKey;
+
+private:
+  friend struct LtsPluginLoaderHandler;
+
+  LtsPluginLoader() = default;
+  ~LtsPluginLoader();
+
+  QMap<PluginKey, PluginInstance> m_loadedPlugins; // TODO: meh...
+};
+
+} // namespace LtsPluginManager