From c3084d5661c83b65e2bb539e80bd986ccfdc11a1 Mon Sep 17 00:00:00 2001
From: dfighter1985 <devnull@localhost>
Date: Sun, 8 Jun 2014 18:17:24 +0200
Subject: [PATCH] Implemented plugin unload.

---
 .../src/extension_system/iplugin_manager.h    |  3 +
 .../src/extension_system/plugin_manager.cpp   | 62 +++++++++++++++++++
 .../src/extension_system/plugin_manager.h     |  4 ++
 .../src/plugins/core/plugin_view_dialog.cpp   | 17 ++++-
 .../src/plugins/core/plugin_view_dialog.h     |  1 +
 5 files changed, 86 insertions(+), 1 deletion(-)

diff --git a/code/studio/src/extension_system/iplugin_manager.h b/code/studio/src/extension_system/iplugin_manager.h
index 15fa4a336..efbf5ee2f 100644
--- a/code/studio/src/extension_system/iplugin_manager.h
+++ b/code/studio/src/extension_system/iplugin_manager.h
@@ -55,6 +55,9 @@ public:
 	virtual void setPluginPaths(const QStringList &paths) = 0;
 	virtual QList<ExtensionSystem::IPluginSpec *> plugins() const = 0;
 
+	virtual bool loadPlugin( const char *plugin ) = 0;
+	virtual bool unloadPlugin( ExtensionSystem::IPluginSpec *plugin ) = 0;
+
 	// Settings
 	virtual void setSettings(QSettings *settings) = 0;
 	virtual QSettings *settings() const = 0;
diff --git a/code/studio/src/extension_system/plugin_manager.cpp b/code/studio/src/extension_system/plugin_manager.cpp
index 265268896..c9f40e7bd 100644
--- a/code/studio/src/extension_system/plugin_manager.cpp
+++ b/code/studio/src/extension_system/plugin_manager.cpp
@@ -114,6 +114,68 @@ void PluginManager::loadPlugins()
 	Q_EMIT pluginsChanged();
 }
 
+bool PluginManager::loadPlugin( const char *plugin )
+{
+	return true;
+}
+
+bool PluginManager::unloadPlugin( ExtensionSystem::IPluginSpec *plugin )
+{
+	ExtensionSystem::PluginSpec *spec = static_cast< ExtensionSystem::PluginSpec* >( plugin );
+
+	// Let's see if anything depends on this one
+	QListIterator< ExtensionSystem::PluginSpec* > itr( m_pluginSpecs );
+	while( itr.hasNext() )
+	{
+		ExtensionSystem::PluginSpec *sp = itr.next();
+		QList< ExtensionSystem::PluginSpec* > l = sp->dependencySpecs();
+		if( l.contains( spec ) )
+			return false;
+	}
+
+	// Stop, delete then remove plugin
+	spec->stop();
+	spec->kill();	
+	removePlugin( plugin );
+
+	return true;
+}
+
+void PluginManager::removePlugin( ExtensionSystem::IPluginSpec *plugin )
+{
+	QList< ExtensionSystem::IPluginSpec* >::iterator itr1;
+	QList< ExtensionSystem::PluginSpec* >::iterator itr2;
+
+	QList< ExtensionSystem::IPluginSpec* >::iterator i1 = m_ipluginSpecs.begin();
+	while( i1 != m_ipluginSpecs.end() )
+	{
+		if( *i1 == plugin )
+		{
+			itr1 = i1;
+			break;
+		}
+		i1++;
+	}
+
+	QList< ExtensionSystem::PluginSpec* >::iterator i2 = m_pluginSpecs.begin();
+	while( i2 != m_pluginSpecs.end() )
+	{
+		if( *i2 == static_cast< ExtensionSystem::PluginSpec* >( plugin ) )
+		{
+			itr2 = i2;
+			break;
+		}
+		i2++;
+	}
+
+	m_ipluginSpecs.erase( itr1 );
+	m_pluginSpecs.erase( itr2 );
+	delete plugin;
+
+	Q_EMIT pluginsChanged();
+
+}
+
 QStringList PluginManager::getPluginPaths() const
 {
 	return m_pluginPaths;
diff --git a/code/studio/src/extension_system/plugin_manager.h b/code/studio/src/extension_system/plugin_manager.h
index 9ab1ae135..10130ffc4 100644
--- a/code/studio/src/extension_system/plugin_manager.h
+++ b/code/studio/src/extension_system/plugin_manager.h
@@ -51,6 +51,10 @@ public:
 	virtual QList<IPluginSpec *> plugins() const;
 	QList<PluginSpec *> loadQueue();
 
+	bool loadPlugin( const char *plugin );
+	bool unloadPlugin( ExtensionSystem::IPluginSpec *plugin );
+	void removePlugin( ExtensionSystem::IPluginSpec *plugin );
+
 	// Settings
 	virtual void setSettings(QSettings *settings);
 	virtual QSettings *settings() const;
diff --git a/code/studio/src/plugins/core/plugin_view_dialog.cpp b/code/studio/src/plugins/core/plugin_view_dialog.cpp
index 316bb0097..bf62d4632 100644
--- a/code/studio/src/plugins/core/plugin_view_dialog.cpp
+++ b/code/studio/src/plugins/core/plugin_view_dialog.cpp
@@ -65,6 +65,7 @@ void PluginView::updateList()
 	static QIcon notLoadedIcon = QApplication::style()->standardIcon(QStyle::SP_DialogResetButton);
 
 	m_specToItem.clear();
+	m_itemToSpec.clear();
 
 	QList<QTreeWidgetItem *> items;
 	Q_FOREACH (ExtensionSystem::IPluginSpec *spec, m_pluginManager->plugins())
@@ -87,6 +88,7 @@ void PluginView::updateList()
 
 		items.append(item);
 		m_specToItem.insert(spec, item);
+		m_itemToSpec.insert(item, spec);
 	}
 
 	m_ui.pluginTreeWidget->clear();
@@ -127,7 +129,18 @@ void PluginView::onUnloadClicked()
 		return;
 	}
 
-	
+	QMap< QTreeWidgetItem*, ExtensionSystem::IPluginSpec* >::const_iterator itr
+		= m_itemToSpec.find( item );
+	if( itr == m_itemToSpec.end() )
+		return;
+
+	bool success = m_pluginManager->unloadPlugin( itr.value() );
+	if( !success )
+	{
+		QMessageBox::warning( this,
+								tr( "Plugin unload" ),
+								tr( "Failed to unload plugin." ) );
+	}
 }
 
 void PluginView::onLoadClicked()
@@ -141,6 +154,8 @@ void PluginView::onLoadClicked()
 	{
 		return;
 	}
+
+	this->m_pluginManager->loadPlugin( f.toAscii().data() );
 }
 
 } /* namespace Core */
\ No newline at end of file
diff --git a/code/studio/src/plugins/core/plugin_view_dialog.h b/code/studio/src/plugins/core/plugin_view_dialog.h
index e11449fdd..e7c1123c1 100644
--- a/code/studio/src/plugins/core/plugin_view_dialog.h
+++ b/code/studio/src/plugins/core/plugin_view_dialog.h
@@ -52,6 +52,7 @@ private:
 
 	const int m_checkStateColumn;
 	QMap<ExtensionSystem::IPluginSpec *, QTreeWidgetItem *> m_specToItem;
+	QMap<QTreeWidgetItem*, ExtensionSystem::IPluginSpec*> m_itemToSpec;
 	QStringList m_whiteList;
 	ExtensionSystem::IPluginManager *m_pluginManager;
 	Ui::PluginView m_ui;