From 80473fb1e465c1f86a9225d02a55d12b220b13e1 Mon Sep 17 00:00:00 2001
From: codereader <greebo@angua.at>
Date: Sun, 12 Sep 2021 15:48:03 +0200
Subject: [PATCH] #5128: Add IManipulatorManager interface, since I want the
 manipulator algorithms to be part of the core module.

---
 include/imanipulator.h                        | 26 ++++++++
 radiantcore/CMakeLists.txt                    |  1 +
 .../manipulators/ManipulatorManager.cpp       | 66 +++++++++++++++++++
 tools/msvc/DarkRadiantCore.vcxproj            |  1 +
 tools/msvc/DarkRadiantCore.vcxproj.filters    |  3 +
 5 files changed, 97 insertions(+)
 create mode 100644 radiantcore/selection/manipulators/ManipulatorManager.cpp

diff --git a/include/imanipulator.h b/include/imanipulator.h
index e2da0ad296..991e5aa1fc 100644
--- a/include/imanipulator.h
+++ b/include/imanipulator.h
@@ -2,6 +2,7 @@
 
 #include <memory>
 #include <string>
+#include "imodule.h"
 
 template<typename Element> class BasicVector2;
 typedef BasicVector2<double> Vector2;
@@ -39,6 +40,12 @@ class IManipulator
 		Custom
 	};
 
+    enum class Context
+    {
+        Scene,          // manipulate regular map elements
+        TextureTool,    // manipualte UV coordinates
+    };
+
 	/**
 	* Part of a Manipulator which can be operated upon by the user.
 	*
@@ -116,4 +123,23 @@ class ISceneManipulator :
     virtual void render(RenderableCollector& collector, const VolumeTest& volume) = 0;
 };
 
+// Factory interface instantiating new IManipulator instances for a given purpose
+class IManipulatorManager :
+    public RegisterableModule
+{
+public:
+    virtual ~IManipulatorManager() {}
+
+    // Acquire a new instance of the given manipulator for the given context and type
+    virtual IManipulator::Ptr createManipulator(IManipulator::Context context, IManipulator::Type type) = 0;
+};
+
+}
+
+const char* const MODULE_MANIPULATORMANAGER("ManipulatorManager");
+
+inline selection::IManipulatorManager& GlobalManipulatorManager()
+{
+    static module::InstanceReference<selection::IManipulatorManager> _reference(MODULE_MANIPULATORMANAGER);
+    return _reference;
 }
diff --git a/radiantcore/CMakeLists.txt b/radiantcore/CMakeLists.txt
index c668bf048d..ab922839b2 100644
--- a/radiantcore/CMakeLists.txt
+++ b/radiantcore/CMakeLists.txt
@@ -244,6 +244,7 @@ add_library(radiantcore MODULE
             selection/manipulators/DragManipulator.cpp
             selection/manipulators/ManipulatorBase.cpp
             selection/manipulators/ManipulatorComponents.cpp
+            selection/manipulators/ManipulatorManager.cpp
             selection/manipulators/ModelScaleManipulator.cpp
             selection/manipulators/RotateManipulator.cpp
             selection/manipulators/ScaleManipulator.cpp
diff --git a/radiantcore/selection/manipulators/ManipulatorManager.cpp b/radiantcore/selection/manipulators/ManipulatorManager.cpp
new file mode 100644
index 0000000000..fa099478e1
--- /dev/null
+++ b/radiantcore/selection/manipulators/ManipulatorManager.cpp
@@ -0,0 +1,66 @@
+#include "imanipulator.h"
+
+#include <map>
+#include "module/StaticModule.h"
+#include "string/convert.h"
+
+namespace selection
+{
+
+class ManipulatorManager :
+    public IManipulatorManager
+{
+private:
+    using ManipulatorsByType = std::map<IManipulator::Type, std::function<IManipulator::Ptr()>>;
+    std::map<IManipulator::Context, ManipulatorsByType> _manipulatorsByContext;
+
+public:
+    
+    IManipulator::Ptr createManipulator(IManipulator::Context context, IManipulator::Type type) override
+    {
+        if (_manipulatorsByContext.count(context) == 0)
+        {
+            throw std::runtime_error("Manipulator context not known: " + string::to_string(static_cast<int>(context)));
+        }
+
+        auto existing = _manipulatorsByContext[context].find(type);
+
+        if (existing == _manipulatorsByContext[context].end())
+        {
+            throw std::runtime_error("Manipulator type not known: " + string::to_string(static_cast<int>(type)));
+        }
+
+        return existing->second();
+    }
+
+    const std::string& getName() const
+    {
+        static std::string _name(MODULE_MANIPULATORMANAGER);
+        return _name;
+    }
+
+    const StringSet& getDependencies() const
+    {
+        static StringSet _dependencies;
+        return _dependencies;
+    }
+
+    void initialiseModule(const IApplicationContext& ctx)
+    {
+        rMessage() << getName() << "::initialiseModule called." << std::endl;
+
+        _manipulatorsByContext.emplace(IManipulator::Context::Scene, ManipulatorsByType());
+        _manipulatorsByContext.emplace(IManipulator::Context::TextureTool, ManipulatorsByType());
+
+        //  TODO
+    }
+
+    void shutdownModule()
+    {
+        _manipulatorsByContext.clear();
+    }
+};
+
+module::StaticModule<ManipulatorManager> _manipulatorManagerInstance;
+
+}
diff --git a/tools/msvc/DarkRadiantCore.vcxproj b/tools/msvc/DarkRadiantCore.vcxproj
index 4360acf89e..5c46043c28 100644
--- a/tools/msvc/DarkRadiantCore.vcxproj
+++ b/tools/msvc/DarkRadiantCore.vcxproj
@@ -657,6 +657,7 @@
     <ClCompile Include="..\..\radiantcore\selection\manipulators\DragManipulator.cpp" />
     <ClCompile Include="..\..\radiantcore\selection\manipulators\ManipulatorBase.cpp" />
     <ClCompile Include="..\..\radiantcore\selection\manipulators\ManipulatorComponents.cpp" />
+    <ClCompile Include="..\..\radiantcore\selection\manipulators\ManipulatorManager.cpp" />
     <ClCompile Include="..\..\radiantcore\selection\manipulators\ModelScaleManipulator.cpp" />
     <ClCompile Include="..\..\radiantcore\selection\manipulators\RotateManipulator.cpp" />
     <ClCompile Include="..\..\radiantcore\selection\manipulators\ScaleManipulator.cpp" />
diff --git a/tools/msvc/DarkRadiantCore.vcxproj.filters b/tools/msvc/DarkRadiantCore.vcxproj.filters
index e58fed1608..f7cea8b5b5 100644
--- a/tools/msvc/DarkRadiantCore.vcxproj.filters
+++ b/tools/msvc/DarkRadiantCore.vcxproj.filters
@@ -1075,6 +1075,9 @@
     <ClCompile Include="..\..\radiantcore\map\autosaver\AutoSaver.cpp">
       <Filter>src\map\autosaver</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\radiantcore\selection\manipulators\ManipulatorManager.cpp">
+      <Filter>src\selection\manipulators</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\radiantcore\modulesystem\ModuleLoader.h">