Component definitions now loaded from schema. No default values yet.

2015-12-08 18:07:32 +01:00
parent 03bbe25a1e
commit d7de4fc694
9 changed files with 504 additions and 46 deletions
@@ -0,0 +1,139 @@
+#ifndef EntityXMLFile_h__
+#define EntityXMLFile_h__
+
+#include <sstream>
+
+#include "../Common.h"
+#include "../GLM.h"
+#include <xercesc/dom/DOM.hpp>
+#include <xercesc/dom/DOMLSInput.hpp>
+#include <xercesc/dom/DOMElement.hpp>
+#include <xercesc/framework/Wrapper4InputSource.hpp>
+#include <xercesc/framework/LocalFileInputSource.hpp>
+#include <xercesc/framework/LocalFileFormatTarget.hpp>
+#include <xercesc/framework/MemBufFormatTarget.hpp>
+#include <xercesc/framework/MemBufInputSource.hpp>
+#include <xercesc/sax/HandlerBase.hpp>
+#include <xercesc/util/PlatformUtils.hpp>
+#include <xercesc/util/XMLFloat.hpp>
+#include <xercesc/framework/XMLGrammarPoolImpl.hpp>
+#include <xercesc/parsers/XercesDOMParser.hpp>
+#include <xercesc/framework/psvi/XSElementDeclaration.hpp>
+#include <xercesc/framework/psvi/XSComplexTypeDefinition.hpp>
+#include <xercesc/framework/psvi/XSParticle.hpp>
+#include <xercesc/framework/psvi/XSModelGroup.hpp>
+#include <xercesc/framework/psvi/XSAnnotation.hpp>
+#include <xercesc/framework/psvi/XSValue.hpp>
+#include <xercesc/framework/XMLValidator.hpp>
+
+#include "ResourceManager.h"
+#include "Entity.h"
+#include "ComponentInfo.h"
+class World;
+
+class EntityPreprocessorXMLErrorHandler : public xercesc::DOMErrorHandler
+{
+public:
+	bool handleError(const xercesc::DOMError &e) override
+	{
+		char* message = xercesc::XMLString::transcode(e.getMessage());
+		std::cerr << "Preprocessor DOMError: " << message << std::endl;
+		xercesc::XMLString::release(&message);
+		return false;
+	}
+};
+
+class EntityParserXMLErrorHandler : public xercesc::ErrorHandler
+{
+public:
+	void warning(const xercesc::SAXParseException& e) override
+	{
+		reportParseException("Warning", e);
+	}
+	void error(const xercesc::SAXParseException& e) override
+	{
+		reportParseException("Error", e);
+	}
+	void fatalError(const xercesc::SAXParseException& e) override
+	{
+		reportParseException("FATAL ERROR", e);
+	}
+	void resetErrors() override { }
+
+private:
+	void reportParseException(std::string type, const xercesc::SAXParseException& e)
+	{
+		char* message = xercesc::XMLString::transcode(e.getMessage());
+		char* systemID = xercesc::XMLString::transcode(e.getSystemId());
+		std::cerr << systemID << ":" << e.getLineNumber() << ":" << e.getColumnNumber() << std::endl;
+		std::cerr << type << ": " << message << std::endl;
+		xercesc::XMLString::release(&systemID);
+		xercesc::XMLString::release(&message);
+	}
+};
+
+class XSTR
+{
+public:
+	XSTR(const XMLCh* const xmlString) 
+	{
+		m_AsChar = xercesc::XMLString::transcode(xmlString);
+	}
+
+	XSTR(const char* normalString)
+	{
+		m_AsXMLCh = xercesc::XMLString::transcode(normalString);
+	}
+
+	~XSTR()
+	{
+		if (m_AsChar != nullptr) {
+			xercesc::XMLString::release(&m_AsChar);
+		}
+		if (m_AsXMLCh != nullptr) {
+			xercesc::XMLString::release(&m_AsXMLCh);
+		}
+	}
+
+	operator const char*() const { return m_AsChar; }
+	operator const XMLCh*() const { return m_AsXMLCh; }
+
+private:
+	char* m_AsChar = nullptr;
+	XMLCh* m_AsXMLCh = nullptr;
+};
+
+class EntityXMLFile : public Resource
+{
+	friend class ResourceManager;
+
+private:
+	EntityXMLFile(std::string path);
+
+public:
+    ~EntityXMLFile();
+
+    void PopulateWorld(World* world);
+
+private:
+    static unsigned int InstanceCount;
+
+	std::string m_EntityFile;
+	xercesc::XMLGrammarPool* m_GrammarPool = nullptr;
+	EntityParserXMLErrorHandler* m_ErrorHandler = nullptr;
+	xercesc::XercesDOMParser* m_DOMParser = nullptr;
+	xercesc::DOMDocument* m_DOMDocument = nullptr;
+	std::map<std::string, ComponentInfo> m_ComponentInfo;
+
+    // Preprocesses the entity file to insert include-by-copy child entities
+    // TODO: Make this work in memory instead of saving to file
+    void preprocess(std::string inPath, std::string outPath);
+
+    void parseComponentInfo();
+    void parseDefaults();
+    void predictComponentAllocation();
+    void parseEntityGraph();
+    std::size_t getTypeStride(std::string typeName);
+};
+
+#endif