engine: internals supporting the facade migration

UndoStack push_pre_executed, FolderAddChild-based true folder moves,
NodeViewDeleteCommand delete-then-reconnect support, event emission
points for the facade event bus, and related internal adjustments.

engine/task/project/import/import.cpp

@@ -46,6 +46,11 @@ ProjectImportTask::ProjectImportTask(Folder *folder,
 	set_title(tr("Importing %n file(s)", nullptr, file_count_));
 }
 
+ProjectImportTask::~ProjectImportTask()
+{
+	delete command_;
+}
+
 const int &ProjectImportTask::get_file_count() const
 {
 	return file_count_;

engine/task/project/import/import.h

@@ -37,12 +37,17 @@ class ProjectImportTask : public Task {
 	Q_OBJECT
 public:
 	ProjectImportTask(Folder *folder, const QStringList &filenames);
+	~ProjectImportTask() override;
 
 	const int &get_file_count() const;
 
-	MultiUndoCommand *get_command() const
+	/** Take ownership of the import command. After this call the task no
+	 *  longer owns (and will not delete) the returned command. */
+	MultiUndoCommand *take_command()
 	{
-		return command_;
+		MultiUndoCommand *c = command_;
+		command_ = nullptr;
+		return c;
 	}
 
 	const QStringList &get_invalid_files() const

engine/task/project/load/load.h

@@ -23,7 +23,7 @@
 #define OAK_PROJECTLOADMANAGER_H
 
 #include "loadbasetask.h"
-#include "node/project/serializer/mainwindowlayoutinfo.h"
+#include "node/project/serializer/serializedlayoutinfo.h"
 
 namespace olive
 {

engine/task/project/load/loadbasetask.h

@@ -23,7 +23,7 @@
 #define OAK_PROJECTLOADBASETASK_H
 
 #include "node/project.h"
-#include "node/project/serializer/mainwindowlayoutinfo.h"
+#include "node/project/serializer/serializedlayoutinfo.h"
 #include "task/task.h"
 
 namespace olive
@@ -44,7 +44,7 @@ public:
 		return filename_;
 	}
 
-	const MainWindowLayoutInfo &get_loaded_layout() const
+	const SerializedLayoutInfo &get_loaded_layout() const
 	{
 		return layout_;
 	}
@@ -52,7 +52,7 @@ public:
 protected:
 	Project *project_;
 
-	MainWindowLayoutInfo layout_;
+	SerializedLayoutInfo layout_;
 
 private:
 	QString filename_;

engine/task/project/save/save.h

@@ -23,7 +23,7 @@
 #define OAK_PROJECTSAVEMANAGER_H
 
 #include "node/project.h"
-#include "node/project/serializer/mainwindowlayoutinfo.h"
+#include "node/project/serializer/serializedlayoutinfo.h"
 #include "task/task.h"
 
 namespace olive
@@ -44,7 +44,7 @@ public:
 		override_filename_ = filename;
 	}
 
-	void set_layout(const MainWindowLayoutInfo &layout)
+	void set_layout(const SerializedLayoutInfo &layout)
 	{
 		layout_ = layout;
 	}
@@ -59,7 +59,7 @@ private:
 
 	bool use_compression_;
 
-	MainWindowLayoutInfo layout_;
+	SerializedLayoutInfo layout_;
 };
 
 }