axmol/cocos2dx/tileMap_parallax_nodes/CCTMXXMLParser.cpp

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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THE SOFTWARE.
****************************************************************************/
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xmlmemory.h>
#include <map>
#include "CCTMXXMLParser.h"
#include "CCTMXTiledMap.h"
#include "ccMacros.h"
#include "CCXFileUtils.h"
#include "CGPointExtension.h"
#include "support/base64.h"
#include "platform/platform.h"

namespace cocos2d {

	void tmx_startElement(void *ctx, const xmlChar *name, const xmlChar **atts);
	void tmx_endElement(void *ctx, const xmlChar *name);
	void tmx_characters(void *ctx, const xmlChar *ch, int len);
	const char* valueForKey(const char *key, std::map<std::string, std::string>* dict)
	{
		if (dict)
		{
			std::map<std::string, std::string>::iterator it = dict->find(key);
			return it!=dict->end() ? it->second.c_str() : "";
		}
		return "";
	}
	// implementation CCTMXLayerInfo
	CCTMXLayerInfo::CCTMXLayerInfo()
		:m_bOwnTiles(true)
		,m_uMinGID(100000)
		,m_uMaxGID(0)
		,m_sName("")
		,m_pTiles(NULL)
		,m_tOffset(CGPointZero)
	{
		m_pProperties= new CCXStringToStringDictionary();;
	}
	CCTMXLayerInfo::~CCTMXLayerInfo()
	{
		CCLOGINFO("cocos2d: deallocing.");
		CCX_SAFE_RELEASE(m_pProperties);
		if( m_bOwnTiles && m_pTiles )
		{
			delete [] m_pTiles;
			m_pTiles = NULL;
		}
	}
	CCXStringToStringDictionary * CCTMXLayerInfo::getProperties()
	{
		return m_pProperties;
	}
	void CCTMXLayerInfo::setProperties(CCXStringToStringDictionary* var)
	{
		CCX_SAFE_RELEASE(m_pProperties);
		m_pProperties = var;
		CCX_SAFE_RETAIN(m_pProperties);
	}

	// implementation CCTMXTilesetInfo
	CCTMXTilesetInfo::CCTMXTilesetInfo()
		:m_uFirstGid(0)
		,m_tTileSize(CGSizeZero)
		,m_uSpacing(0)
		,m_uMargin(0)
		,m_tImageSize(CGSizeZero)
	{
	}
	CCTMXTilesetInfo::~CCTMXTilesetInfo()
	{
		CCLOGINFO("cocos2d: deallocing.");
	}
	CGRect CCTMXTilesetInfo::rectForGID(unsigned int gid)
	{
		CGRect rect;
		rect.size = m_tTileSize;
		gid = gid - m_uFirstGid;
		int max_x = (int)((m_tImageSize.width - m_uMargin*2 + m_uSpacing) / (m_tTileSize.width + m_uSpacing));
		//	int max_y = (imageSize.height - margin*2 + spacing) / (tileSize.height + spacing);
		rect.origin.x = (gid % max_x) * (m_tTileSize.width + m_uSpacing) + m_uMargin;
		rect.origin.y = (gid / max_x) * (m_tTileSize.height + m_uSpacing) + m_uMargin;
		return rect;
	}

	// implementation CCTMXMapInfo

	CCTMXMapInfo * CCTMXMapInfo::formatWithTMXFile(const char *tmxFile)
	{
		CCTMXMapInfo *pRet = new CCTMXMapInfo();
		if(pRet->initWithTMXFile(tmxFile))
		{
			pRet->autorelease();
			return pRet;
		}
		CCX_SAFE_DELETE(pRet);
		return NULL;
	}
	bool CCTMXMapInfo::initWithTMXFile(const char *tmxFile)
	{
		m_pTilesets = new NSMutableArray<CCTMXTilesetInfo*>();
		m_pLayers = new NSMutableArray<CCTMXLayerInfo*>();
		m_sTMXFileName = CCFileUtils::fullPathFromRelativePath(tmxFile);
		m_pObjectGroups = new NSMutableArray<CCTMXObjectGroup*>();
		m_pProperties = new CCXStringToStringDictionary();
		m_pTileProperties = new NSDictionary<int, CCXStringToStringDictionary*>();

		// tmp vars
		m_sCurrentString = "";
		m_bStoringCharacters = false;
		m_nLayerAttribs = TMXLayerAttribNone;
		m_nParentElement = TMXPropertyNone;

		return parseXMLFile(m_sTMXFileName.c_str());
	}
	CCTMXMapInfo::CCTMXMapInfo()
		:m_bStoringCharacters(false)
		,m_nLayerAttribs(0)
		,m_tMapSize(CGSizeZero)
		,m_tTileSize(CGSizeZero)
		,m_pLayers(NULL)
		,m_pTilesets(NULL)
		,m_pObjectGroups(NULL)
		,m_pProperties(NULL)
		,m_pTileProperties(NULL)
	{
	}
	CCTMXMapInfo::~CCTMXMapInfo()
	{
		CCLOGINFO("cocos2d: deallocing.");
		CCX_SAFE_RELEASE(m_pTilesets);
		CCX_SAFE_RELEASE(m_pLayers);
		CCX_SAFE_RELEASE(m_pProperties);
		CCX_SAFE_RELEASE(m_pTileProperties);
		CCX_SAFE_RELEASE(m_pObjectGroups);
	}
	NSMutableArray<CCTMXLayerInfo*> * CCTMXMapInfo::getLayers()
	{
		return m_pLayers;
	}
	void CCTMXMapInfo::setLayers(NSMutableArray<CCTMXLayerInfo*>* var)
	{
		CCX_SAFE_RELEASE(m_pLayers);
		m_pLayers = var;
		CCX_SAFE_RETAIN(m_pLayers);
	}
	NSMutableArray<CCTMXTilesetInfo*> * CCTMXMapInfo::getTilesets()
	{
		return m_pTilesets;
	}
	void CCTMXMapInfo::setTilesets(NSMutableArray<CCTMXTilesetInfo*>* var)
	{
		CCX_SAFE_RELEASE(m_pTilesets);
		m_pTilesets = var;
		CCX_SAFE_RETAIN(m_pTilesets);
	}
	NSMutableArray<CCTMXObjectGroup*> * CCTMXMapInfo::getObjectGroups()
	{
		return m_pObjectGroups;
	}
	void CCTMXMapInfo::setObjectGroups(NSMutableArray<CCTMXObjectGroup*>* var)
	{
		CCX_SAFE_RELEASE(m_pObjectGroups);
		m_pObjectGroups = var;
		CCX_SAFE_RETAIN(m_pObjectGroups);
	}
	CCXStringToStringDictionary * CCTMXMapInfo::getProperties()
	{
		return m_pProperties;
	}
	void CCTMXMapInfo::setProperties(CCXStringToStringDictionary* var)
	{
		CCX_SAFE_RELEASE(m_pProperties);
		m_pProperties = var;
		CCX_SAFE_RETAIN(m_pProperties);
	}
	NSDictionary<int, CCXStringToStringDictionary*> * CCTMXMapInfo::getTileProperties()
	{
		return m_pTileProperties;
	}
	void CCTMXMapInfo::setTileProperties(NSDictionary<int, CCXStringToStringDictionary*> * tileProperties)
	{
		CCX_SAFE_RELEASE(m_pTileProperties);
		m_pTileProperties = tileProperties;
		CCX_SAFE_RETAIN(m_pTileProperties);
	}

	bool CCTMXMapInfo::parseXMLFile(const char *xmlFilename)
	{
		FILE *fp = NULL;
		if( !(fp = fopen(xmlFilename, "r")) )
		{
			return NULL;
		}
		fseek(fp,0,SEEK_END);
		int size = ftell(fp);
		fseek(fp,0,SEEK_SET);
		char *buffer = new char[size+1];
		fread(buffer,sizeof(char),size,fp);
		fclose(fp);
		/*
		* this initialize the library and check potential ABI mismatches
		* between the version it was compiled for and the actual shared
		* library used.
		*/
		LIBXML_TEST_VERSION
			xmlSAXHandler saxHandler;
		memset( &saxHandler, 0, sizeof(saxHandler) );
		// Using xmlSAXVersion( &saxHandler, 2 ) generate crash as it sets plenty of other pointers...
		saxHandler.initialized = XML_SAX2_MAGIC;  // so we do this to force parsing as SAX2.
		saxHandler.startElement = &tmx_startElement;
		saxHandler.endElement = &tmx_endElement;
		saxHandler.characters = &tmx_characters;
		
		int result = xmlSAXUserParseMemory( &saxHandler, this, buffer, size );
		if ( result != 0 )
		{
			return false;
		}
		/*
		* Cleanup function for the XML library.
		*/
		xmlCleanupParser();
		/*
		* this is to debug memory for regression tests
		*/
		xmlMemoryDump();
		delete []buffer;
		return true;
	}


	// the XML parser calls here with all the elements
	void tmx_startElement(void *ctx, const xmlChar *name, const xmlChar **atts)
	{	
		CCTMXMapInfo *pTMXMapInfo = (CCTMXMapInfo*)(ctx);
		std::string elementName = (char*)name;
		std::map<std::string, std::string> *attributeDict = new std::map<std::string, std::string>();
		if(atts && atts[0])
		{
			for(int i = 0; atts[i]; i += 2) 
			{
				std::string key = (char*)atts[i];
				std::string value = (char*)atts[i+1];
				attributeDict->insert(pair<std::string, std::string>(key, value));
			}
		}
		if(elementName == "map")
		{
			std::string version = valueForKey("version", attributeDict);
			if ( version != "1.0")
			{
				CCLOG("cocos2d: TMXFormat: Unsupported TMX version: %@", version);
			}
			std::string orientationStr = valueForKey("orientation", attributeDict);
			if( orientationStr == "orthogonal")
				pTMXMapInfo->setOrientation(CCTMXOrientationOrtho);
			else if ( orientationStr  == "isometric")
				pTMXMapInfo->setOrientation(CCTMXOrientationIso);
			else if( orientationStr == "hexagonal")
				pTMXMapInfo->setOrientation(CCTMXOrientationHex);
			else
				CCLOG("cocos2d: TMXFomat: Unsupported orientation: %d", pTMXMapInfo->getOrientation());

			CGSize s;
			s.width = (float)atof(valueForKey("width", attributeDict));
			s.height = (float)atof(valueForKey("height", attributeDict));
			pTMXMapInfo->setMapSize(s);

			s.width = (float)atof(valueForKey("tilewidth", attributeDict));
			s.height = (float)atof(valueForKey("tileheight", attributeDict));
			pTMXMapInfo->setTileSize(s);

			// The parent element is now "map"
			pTMXMapInfo->setParentElement(TMXPropertyMap);
		} 
		else if(elementName == "tileset") 
		{
			// If this is an external tileset then start parsing that
			std::string externalTilesetFilename = valueForKey("source", attributeDict);
			if (externalTilesetFilename != "")
			{
				externalTilesetFilename = CCFileUtils::fullPathFromRelativeFile(externalTilesetFilename.c_str(), pTMXMapInfo->getTMXFileName());
				pTMXMapInfo->parseXMLFile(externalTilesetFilename.c_str());
			}
			else
			{
				CCTMXTilesetInfo *tileset = new CCTMXTilesetInfo();
				tileset->m_sName = valueForKey("name", attributeDict);
				tileset->m_uFirstGid = (unsigned int)atoi(valueForKey("firstgid", attributeDict));
				tileset->m_uSpacing = (unsigned int)atoi(valueForKey("spacing", attributeDict));
				tileset->m_uMargin = (unsigned int)atoi(valueForKey("margin", attributeDict));
				CGSize s;
				s.width = (float)atof(valueForKey("tilewidth", attributeDict));
				s.height = (float)atof(valueForKey("tileheight", attributeDict));
				tileset->m_tTileSize = s;

				pTMXMapInfo->getTilesets()->addObject(tileset);
				tileset->release();
			}
		}
		else if(elementName == "tile")
		{
			CCTMXTilesetInfo* info = pTMXMapInfo->getTilesets()->getLastObject();
			CCXStringToStringDictionary *dict = new CCXStringToStringDictionary();
			pTMXMapInfo->setParentGID(info->m_uFirstGid + atoi(valueForKey("id", attributeDict)));
			pTMXMapInfo->getTileProperties()->setObject(dict, pTMXMapInfo->getParentGID());
			CCX_SAFE_RELEASE(dict);
			
			pTMXMapInfo->setParentElement(TMXPropertyTile);

		}
		else if(elementName == "layer")
		{
			CCTMXLayerInfo *layer = new CCTMXLayerInfo();
			layer->m_sName = valueForKey("name", attributeDict);

			CGSize s;
			s.width = (float)atof(valueForKey("width", attributeDict));
			s.height = (float)atof(valueForKey("height", attributeDict));
			layer->m_tLayerSize = s;

			std::string visible = valueForKey("visible", attributeDict);
			layer->m_bVisible = !(visible == "0");

			std::string opacity = valueForKey("opacity", attributeDict);
			if( opacity != "" )
			{
				layer->m_cOpacity = (unsigned char)(255 * atof(opacity.c_str()));
			}
			else
			{
				layer->m_cOpacity = 255;
			}

			float x = (float)atof(valueForKey("x", attributeDict));
			float y = (float)atof(valueForKey("y", attributeDict));
			layer->m_tOffset = ccp(x,y);

			pTMXMapInfo->getLayers()->addObject(layer);
			layer->release();

			// The parent element is now "layer"
			pTMXMapInfo->setParentElement(TMXPropertyLayer);

		} 
		else if(elementName == "objectgroup")
		{
			CCTMXObjectGroup *objectGroup = new CCTMXObjectGroup();
			objectGroup->setGroupName(valueForKey("name", attributeDict));
			CGPoint positionOffset;
			positionOffset.x = (float)atof(valueForKey("x", attributeDict)) * pTMXMapInfo->getTileSize().width;
			positionOffset.y = (float)atof(valueForKey("y", attributeDict)) * pTMXMapInfo->getTileSize().height;
			objectGroup->setPositionOffset(positionOffset);

			pTMXMapInfo->getObjectGroups()->addObject(objectGroup);
			objectGroup->release();

			// The parent element is now "objectgroup"
			pTMXMapInfo->setParentElement(TMXPropertyObjectGroup);

		}
		else if(elementName == "image")
		{
			CCTMXTilesetInfo *tileset = pTMXMapInfo->getTilesets()->getLastObject();

			// build full path
			std::string imagename = valueForKey("source", attributeDict);		
			tileset->m_sSourceImage = CCFileUtils::fullPathFromRelativeFile(imagename.c_str(), pTMXMapInfo->getTMXFileName());

		} 
		else if(elementName == "data")
		{
			std::string encoding = valueForKey("encoding", attributeDict);
			std::string compression = valueForKey("compression", attributeDict);

			if( encoding == "base64" )
			{
				int layerAttribs = pTMXMapInfo->getLayerAttribs();
				pTMXMapInfo->setLayerAttribs(layerAttribs | TMXLayerAttribBase64);
				pTMXMapInfo->setStoringCharacters(true);

				if( compression == "gzip" )
				{
					layerAttribs = pTMXMapInfo->getLayerAttribs();
					pTMXMapInfo->setLayerAttribs(layerAttribs | TMXLayerAttribGzip);
				}
				NSAssert( compression == "" || compression == "gzip", "TMX: unsupported compression method" );
			}
			NSAssert( pTMXMapInfo->getLayerAttribs() != TMXLayerAttribNone, "TMX tile map: Only base64 and/or gzip maps are supported" );

		} 
		else if(elementName == "object")
		{
			char buffer[32];
			CCTMXObjectGroup *objectGroup = pTMXMapInfo->getObjectGroups()->getLastObject();

			// The value for "type" was blank or not a valid class name
			// Create an instance of TMXObjectInfo to store the object and its properties
			CCXStringToStringDictionary *dict = new CCXStringToStringDictionary();

			// Set the name of the object to the value for "name"
			std::string key = "name";
			NSString *value = new NSString(valueForKey("name", attributeDict));
			dict->setObject(value, key);
			value->release();

			// Assign all the attributes as key/name pairs in the properties dictionary
			key = "type";
			value = new NSString(valueForKey("type", attributeDict));
			dict->setObject(value, key);
			value->release();

			int x = atoi(valueForKey("x", attributeDict)) + (int)objectGroup->getPositionOffset().x;
			key = "x";
			sprintf(buffer, "%d", x);
			value = new NSString(buffer);
			dict->setObject(value, key);
			value->release();

			int y = atoi(valueForKey("y", attributeDict)) + (int)objectGroup->getPositionOffset().y;
			// Correct y position. (Tiled uses Flipped, cocos2d uses Standard)
			y = (int)(pTMXMapInfo->getMapSize().height * pTMXMapInfo->getTileSize().height) - y - atoi(valueForKey("height", attributeDict));
			key = "y";
			sprintf(buffer, "%d", y);
			value = new NSString(buffer);
			dict->setObject(value, key);
			value->release();

			key = "width";
			value = new NSString(valueForKey("width", attributeDict));
			dict->setObject(value, key);
			value->release();

			key = "height";
			value = new NSString(valueForKey("height", attributeDict));
			dict->setObject(value, key);
			value->release();

			// Add the object to the objectGroup
			objectGroup->getObjects()->addObject(dict);
			dict->release();

			// The parent element is now "object"
			pTMXMapInfo->setParentElement(TMXPropertyObject);

		} 
		else if(elementName == "property")
		{
			if ( pTMXMapInfo->getParentElement() == TMXPropertyNone ) 
			{
				CCLOG( "TMX tile map: Parent element is unsupported. Cannot add property named '%s' with value '%s'",
					valueForKey("name", attributeDict), valueForKey("value",attributeDict) );
			} 
			else if ( pTMXMapInfo->getParentElement() == TMXPropertyMap )
			{
				// The parent element is the map
				NSString *value = new NSString(valueForKey("value", attributeDict));
				std::string key = valueForKey("name", attributeDict);
				pTMXMapInfo->getProperties()->setObject(value, key);
				value->release();

			} 
			else if ( pTMXMapInfo->getParentElement() == TMXPropertyLayer )
			{
				// The parent element is the last layer
				CCTMXLayerInfo *layer = pTMXMapInfo->getLayers()->getLastObject();
				NSString *value = new NSString(valueForKey("value", attributeDict));
				std::string key = valueForKey("name", attributeDict);
				// Add the property to the layer
				layer->getProperties()->setObject(value, key);
				value->release();

			} 
			else if ( pTMXMapInfo->getParentElement() == TMXPropertyObjectGroup ) 
			{
				// The parent element is the last object group
				CCTMXObjectGroup *objectGroup = pTMXMapInfo->getObjectGroups()->getLastObject();
				NSString *value = new NSString(valueForKey("value", attributeDict));
				std::string key = valueForKey("name", attributeDict);
				objectGroup->getProperties()->setObject(value, key);
				value->release();

			} 
			else if ( pTMXMapInfo->getParentElement() == TMXPropertyObject )
			{
				// The parent element is the last object
				CCTMXObjectGroup *objectGroup = pTMXMapInfo->getObjectGroups()->getLastObject();
				CCXStringToStringDictionary *dict = objectGroup->getObjects()->getLastObject();

				std::string propertyName = valueForKey("name", attributeDict);
				NSString *propertyValue = new NSString(valueForKey("value", attributeDict));
				dict->setObject(propertyValue, propertyName);
				propertyValue->release();
			} 
			else if ( pTMXMapInfo->getParentElement() == TMXPropertyTile ) 
			{
				CCXStringToStringDictionary *dict;
				dict = pTMXMapInfo->getTileProperties()->objectForKey(pTMXMapInfo->getParentGID());

				std::string propertyName = valueForKey("name", attributeDict);
				NSString *propertyValue = new NSString(valueForKey("value", attributeDict));
				dict->setObject(propertyValue, propertyName);
				propertyValue->release();
			}
		}
		if (attributeDict)
		{
			attributeDict->clear();
			delete attributeDict;
		}
	}

	void tmx_endElement(void *ctx, const xmlChar *name)
	{
		CCTMXMapInfo *pTMXMapInfo = (CCTMXMapInfo*)(ctx);
		std::string elementName = (char*)name;

		int len = 0;

		if(elementName == "data" && pTMXMapInfo->getLayerAttribs()&TMXLayerAttribBase64) 
		{
			pTMXMapInfo->setStoringCharacters(false);

			CCTMXLayerInfo *layer = pTMXMapInfo->getLayers()->getLastObject();

			std::string currentString = pTMXMapInfo->getCurrentString();
			unsigned char *buffer;
			len = base64Decode((unsigned char*)currentString.c_str(), currentString.length(), &buffer);
			if( ! buffer ) 
			{
				CCLOG("cocos2d: TiledMap: decode data error");
				return;
			}

			if( pTMXMapInfo->getLayerAttribs() & TMXLayerAttribGzip )
			{
				unsigned char *deflated;
				ZipUtils::inflateMemory(buffer, len, &deflated);
				delete [] buffer;
				buffer = NULL;

				if( ! deflated ) 
				{
					CCLOG("cocos2d: TiledMap: inflate data error");
					return;
				}

				layer->m_pTiles = (unsigned int*) deflated;
			}
			else
			{
				layer->m_pTiles = (unsigned int*) buffer;
			}

			pTMXMapInfo->setCurrentString("");

		} 
		else if (elementName == "map")
		{
			// The map element has ended
			pTMXMapInfo->setParentElement(TMXPropertyNone);
		}	
		else if (elementName == "layer")
		{
			// The layer element has ended
			pTMXMapInfo->setParentElement(TMXPropertyNone);
		}
		else if (elementName == "objectgroup")
		{
			// The objectgroup element has ended
			pTMXMapInfo->setParentElement(TMXPropertyNone);
		} 
		else if (elementName == "object") 
		{
			// The object element has ended
			pTMXMapInfo->setParentElement(TMXPropertyNone);
		}
	}
	void tmx_characters(void *ctx, const xmlChar *ch, int len)
	{
		CCTMXMapInfo *pTMXMapInfo = (CCTMXMapInfo*)(ctx);
		std::string pText((char*)ch,0,len);

		if (pTMXMapInfo->getStoringCharacters())
		{
			std::string currentString = pTMXMapInfo->getCurrentString();
			currentString += pText;
			pTMXMapInfo->setCurrentString(currentString.c_str());
		}
	}

}//namespace cocos2d