From 1ee64c7087d062e57b8e4821c4f2c2301e699725 Mon Sep 17 00:00:00 2001
From: cc9cii <cc9c@iinet.net.au>
Date: Sat, 1 Nov 2014 19:12:22 +1100
Subject: [PATCH] Add missing files for multi-document support.

---
 apps/opencs/view/world/physicsmanager.cpp | 87 +++++++++++++++++++++++
 apps/opencs/view/world/physicsmanager.hpp | 58 +++++++++++++++
 2 files changed, 145 insertions(+)
 create mode 100644 apps/opencs/view/world/physicsmanager.cpp
 create mode 100644 apps/opencs/view/world/physicsmanager.hpp

diff --git a/apps/opencs/view/world/physicsmanager.cpp b/apps/opencs/view/world/physicsmanager.cpp
new file mode 100644
index 0000000000..ce71ac3150
--- /dev/null
+++ b/apps/opencs/view/world/physicsmanager.cpp
@@ -0,0 +1,87 @@
+#include "physicsmanager.hpp"
+
+#include <iostream>
+
+#include "../render/worldspacewidget.hpp"
+#include "physicssystem.hpp"
+
+namespace CSVWorld
+{
+    PhysicsManager *PhysicsManager::mPhysicsManagerInstance = 0;
+
+    PhysicsManager::PhysicsManager()
+    {
+        assert(!mPhysicsManagerInstance);
+        mPhysicsManagerInstance = this;
+    }
+
+    PhysicsManager::~PhysicsManager()
+    {
+        std::map<CSMDoc::Document *, CSVWorld::PhysicsSystem *>::iterator iter = mPhysics.begin();
+        for(; iter != mPhysics.end(); ++iter)
+            delete iter->second; // shouldn't be any left but just in case
+    }
+
+    PhysicsManager *PhysicsManager::instance()
+    {
+        assert(mPhysicsManagerInstance);
+        return mPhysicsManagerInstance;
+    }
+
+    // create a physics instance per document, called from CSVDoc::View() to get Document*
+    void PhysicsManager::setupPhysics(CSMDoc::Document *doc)
+    {
+        std::map<CSMDoc::Document *, std::list<CSVRender::SceneWidget *> >::iterator iter = mSceneWidgets.find(doc);
+        if(iter == mSceneWidgets.end())
+        {
+            mSceneWidgets[doc] = std::list<CSVRender::SceneWidget *> {}; // zero elements
+            mPhysics[doc] = new PhysicsSystem();
+        }
+    }
+
+    // called from CSVRender::WorldspaceWidget() to get widgets' association with Document&
+    PhysicsSystem *PhysicsManager::addSceneWidget(CSMDoc::Document &doc, CSVRender::WorldspaceWidget *widget)
+    {
+        CSVRender::SceneWidget *sceneWidget = static_cast<CSVRender::SceneWidget *>(widget);
+
+        std::map<CSMDoc::Document *, std::list<CSVRender::SceneWidget *> >::iterator iter = mSceneWidgets.begin();
+        for(; iter != mSceneWidgets.end(); ++iter)
+        {
+            if((*iter).first == &doc)
+            {
+                (*iter).second.push_back(sceneWidget);
+                return mPhysics[(*iter).first];  // TODO: consider using shared_ptr instead
+            }
+        }
+
+        throw std::runtime_error("No physics system found for the given document.");
+    }
+
+    // delete physics when the last scene widget for the document is closed
+    void PhysicsManager::removeSceneWidget(CSVRender::WorldspaceWidget *widget)
+    {
+        CSVRender::SceneWidget *sceneWidget = static_cast<CSVRender::SceneWidget *>(widget);
+
+        std::map<CSMDoc::Document *, std::list<CSVRender::SceneWidget *> >::iterator iter = mSceneWidgets.begin();
+        for(; iter != mSceneWidgets.end(); ++iter)
+        {
+            std::list<CSVRender::SceneWidget *>::iterator itWidget = (*iter).second.begin();
+            for(; itWidget != (*iter).second.end(); ++itWidget)
+            {
+                if((*itWidget) == sceneWidget)
+                {
+                    (*iter).second.erase(itWidget);
+
+                    if((*iter).second.empty()) // last one for the document
+                    {
+                        delete mPhysics[(*iter).first];
+                        mPhysics.erase((*iter).first);
+                        mSceneWidgets.erase(iter);
+                    }
+
+                    break;
+                }
+            }
+        }
+    }
+}
diff --git a/apps/opencs/view/world/physicsmanager.hpp b/apps/opencs/view/world/physicsmanager.hpp
new file mode 100644
index 0000000000..7bcd5d39de
--- /dev/null
+++ b/apps/opencs/view/world/physicsmanager.hpp
@@ -0,0 +1,58 @@
+#ifndef CSV_WORLD_PHYSICSMANAGER_H
+#define CSV_WORLD_PHYSICSMANAGER_H
+
+#include <map>
+#include <list>
+
+namespace Ogre
+{
+    class SceneManager;
+}
+
+namespace CSMDoc
+{
+    class Document;
+}
+
+namespace CSVRender
+{
+    class WorldspaceWidget;
+    class SceneWidget;
+}
+
+namespace CSVWorld
+{
+    class PhysicsSystem;
+}
+
+namespace CSVWorld
+{
+    class PhysicsManager
+    {
+            static PhysicsManager *mPhysicsManagerInstance;
+
+            //std::map<CSVRender::SceneWidget *, Ogre::SceneManager*>  mSceneManagers;
+            std::map<CSMDoc::Document *, std::list<CSVRender::SceneWidget *> > mSceneWidgets;
+            std::map<CSMDoc::Document *, CSVWorld::PhysicsSystem *> mPhysics;
+
+        public:
+
+            PhysicsManager();
+            ~PhysicsManager();
+
+            static PhysicsManager *instance();
+
+            void setupPhysics(CSMDoc::Document *);
+#if 0
+            void addSceneManager(CSVRender::SceneWidget *sceneWidget, Ogre::SceneManager *sceneMgr);
+
+            void removeSceneManager(CSVRender::SceneWidget *sceneWidget);
+#endif
+
+            PhysicsSystem *addSceneWidget(CSMDoc::Document &doc, CSVRender::WorldspaceWidget *widget);
+
+            void removeSceneWidget(CSVRender::WorldspaceWidget *widget);
+    };
+}
+
+#endif // CSV_WORLD_PHYSICSMANAGER_H