/*************************************************************************/
/*  doc_data.cpp                                                         */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "version.h"
#include "doc_data.h"

#include "global_constants.h"
#include "globals.h"
#include "script_language.h"
#include "io/marshalls.h"
#include "io/compression.h"
#include "scene/resources/theme.h"

void DocData::merge_from(const DocData& p_data) {

	for( Map<String,ClassDoc>::Element *E=class_list.front();E;E=E->next()) {


		ClassDoc &c = E->get();

		if (!p_data.class_list.has(c.name))
			continue;

		const ClassDoc &cf = p_data.class_list[c.name];

		c.description=cf.description;
		c.brief_description=cf.brief_description;

		for(int i=0;i<c.methods.size();i++) {

			MethodDoc &m = c.methods[i];

			for(int j=0;j<cf.methods.size();j++) {

				if (cf.methods[j].name!=m.name)
					continue;
				if (cf.methods[j].arguments.size()!=m.arguments.size())
					continue;
				// since polymorphic functions are allowed we need to check the type of
				// the arguments so we make sure they are different.
				int arg_count = cf.methods[j].arguments.size();
				bool* arg_used = new bool[arg_count];
				for (int l = 0; l < arg_count; ++l) arg_used[l] = false;
				// also there is no guarantee that argument ordering will match, so we
				// have to check one by one so we make sure we have an exact match
				for (int k = 0; k < arg_count; ++k) {
					for (int l = 0; l < arg_count; ++l)
						if (cf.methods[j].arguments[k].type == m.arguments[l].type && !arg_used[l]) {
							arg_used[l] = true;
							break;
						}
				}
				bool not_the_same = false;
				for (int l = 0; l < arg_count; ++l)
					if (!arg_used[l]) // at least one of the arguments was different
						not_the_same = true;
				if (not_the_same)
					continue;

				const MethodDoc &mf = cf.methods[j];

				m.description=mf.description;
				break;
			}
		}


		for(int i=0;i<c.signals.size();i++) {

			MethodDoc &m = c.signals[i];

			for(int j=0;j<cf.signals.size();j++) {

				if (cf.signals[j].name!=m.name)
					continue;
				const MethodDoc &mf = cf.signals[j];

				m.description=mf.description;
				break;
			}
		}

		for(int i=0;i<c.constants.size();i++) {

			ConstantDoc &m = c.constants[i];

			for(int j=0;j<cf.constants.size();j++) {

				if (cf.constants[j].name!=m.name)
					continue;
				const ConstantDoc &mf = cf.constants[j];

				m.description=mf.description;
				break;
			}
		}

		for(int i=0;i<c.properties.size();i++) {

			PropertyDoc &p = c.properties[i];

			for(int j=0;j<cf.properties.size();j++) {

				if (cf.properties[j].name!=p.name)
					continue;
				const PropertyDoc &pf = cf.properties[j];

				p.description=pf.description;
				break;
			}
		}

		for(int i=0;i<c.theme_properties.size();i++) {

			PropertyDoc &p = c.theme_properties[i];

			for(int j=0;j<cf.theme_properties.size();j++) {

				if (cf.theme_properties[j].name!=p.name)
					continue;
				const PropertyDoc &pf = cf.theme_properties[j];

				p.description=pf.description;
				break;
			}
		}

	}

}

void DocData::generate(bool p_basic_types) {


	List<StringName> classes;
	ObjectTypeDB::get_type_list(&classes);
	classes.sort_custom<StringName::AlphCompare>();

	while(classes.size()) {

		String name=classes.front()->get();
		String cname=name;
		if (cname.begins_with("_")) //proxy class
			cname=cname.substr(1,name.length());

		class_list[cname]=ClassDoc();
		ClassDoc& c = class_list[cname];
		c.name=cname;
		c.inherits=ObjectTypeDB::type_inherits_from(name);
		c.category=ObjectTypeDB::get_category(name);

		List<MethodInfo> method_list;
		ObjectTypeDB::get_method_list(name,&method_list,true);
		method_list.sort();


		for(List<MethodInfo>::Element *E=method_list.front();E;E=E->next()) {

			if (E->get().name=="" || (E->get().name[0]=='_' && !(E->get().flags&METHOD_FLAG_VIRTUAL)))
				continue; //hiden, dont count

			MethodDoc method;

			method.name=E->get().name;

			MethodBind *m = ObjectTypeDB::get_method(name,E->get().name);


			if (E->get().flags&METHOD_FLAG_VIRTUAL)
				method.qualifiers="virtual";
			if (E->get().flags&METHOD_FLAG_CONST) {
				if (method.qualifiers!="")
					method.qualifiers+=" ";
				method.qualifiers+="const";
			}

			for(int i=-1;i<E->get().arguments.size();i++) {

				PropertyInfo arginfo;

				if (i==-1) {


					arginfo=E->get().return_val;
#ifdef DEBUG_METHODS_ENABLED
					if (m && m->get_return_type()!=StringName())
						method.return_type=m->get_return_type();
					else if (arginfo.type!=Variant::NIL) // {
#endif
						method.return_type=(arginfo.hint==PROPERTY_HINT_RESOURCE_TYPE)?arginfo.hint_string:Variant::get_type_name(arginfo.type);
//					}

				} else {

					ArgumentDoc argument;

					arginfo=E->get().arguments[i];

					String type_name;

					if (arginfo.name.find(":")!=-1) {
						type_name=arginfo.name.get_slice(":",1);
						arginfo.name=arginfo.name.get_slice(":",0);

					} else if (arginfo.hint==PROPERTY_HINT_RESOURCE_TYPE) {
						type_name=arginfo.hint_string;
					} else if (arginfo.type==Variant::NIL)
						type_name="var";
					else
						type_name=Variant::get_type_name(arginfo.type);

					if (arginfo.type==Variant::OBJECT) {

						//print_line("validate: "+cname+"::"+method.name);
					}

					if (m && m->has_default_argument(i)) {
						Variant default_arg=m->get_default_argument(i);
						String default_arg_text=m->get_default_argument(i);

						switch(default_arg.get_type()) {

							case Variant::NIL:
								default_arg_text="NULL";
								break;
							// atomic types
							case Variant::BOOL:
								if (bool(default_arg))
									default_arg_text="true";
								else
									default_arg_text="false";
								break;
							case Variant::INT:
							case Variant::REAL:
								//keep it
								break;
							case Variant::STRING:		// 15
							case Variant::NODE_PATH:		// 15
								default_arg_text="\""+default_arg_text+"\"";
								break;
							case Variant::TRANSFORM:
								if (default_arg.operator Transform()==Transform()) {
									default_arg_text="";
								}

								default_arg_text=Variant::get_type_name(default_arg.get_type())+"("+default_arg_text+")";
								break;

							case Variant::VECTOR2:		// 5
							case Variant::RECT2:
							case Variant::VECTOR3:
							case Variant::PLANE:
							case Variant::QUAT:
							case Variant::_AABB: //sorry naming convention fail :( not like it's used often // 10
							case Variant::MATRIX3:
							case Variant::COLOR:
							case Variant::RAW_ARRAY:
							case Variant::INT_ARRAY:
							case Variant::REAL_ARRAY:
							case Variant::STRING_ARRAY:	//25
							case Variant::VECTOR2_ARRAY:
							case Variant::VECTOR3_ARRAY:
							case Variant::COLOR_ARRAY:
								default_arg_text=Variant::get_type_name(default_arg.get_type())+"("+default_arg_text+")";
								break;
							case Variant::OBJECT:
							case Variant::INPUT_EVENT:
							case Variant::DICTIONARY:		// 20
							case Variant::ARRAY:
							case Variant::_RID:
							case Variant::IMAGE:
							//case Variant::RESOURCE:

								default_arg_text=Variant::get_type_name(default_arg.get_type())+"()";
								break;
							default: {}

						}


						argument.type=type_name;
						argument.name=arginfo.name;
						argument.default_value=default_arg_text;
					} else {

						argument.type=type_name;
						argument.name=arginfo.name;
					}

					if (arginfo.type==Variant::OBJECT) {

						//print_line("validate: "+cname+"::"+method.name);
					}

					method.arguments.push_back(argument);
				}

/*
				String hint;
				switch(arginfo.hint) {
					case PROPERTY_HINT_DIR: hint="A directory."; break;
					case PROPERTY_HINT_RANGE: hint="Range - min: "+arginfo.hint_string.get_slice(",",0)+" max: "+arginfo.hint_string.get_slice(",",1)+" step: "+arginfo.hint_string.get_slice(",",2); break;
					case PROPERTY_HINT_ENUM: hint="Values: "; for(int j=0;j<arginfo.hint_string.get_slice_count(",");j++) { if (j>0) hint+=", "; hint+=arginfo.hint_string.get_slice(",",j)+"="+itos(j); } break;
					case PROPERTY_HINT_LENGTH: hint="Length: "+arginfo.hint_string; break;
					case PROPERTY_HINT_FLAGS: hint="Values: "; for(int j=0;j<arginfo.hint_string.get_slice_count(",");j++) { if (j>0) hint+=", "; hint+=arginfo.hint_string.get_slice(",",j)+"="+itos(1<<j); } break;
					case PROPERTY_HINT_FILE: hint="A file:"; break;
					//case PROPERTY_HINT_RESOURCE_TYPE: hint="Type: "+arginfo.hint_string; break;
				};
				if (hint!="")
					_write_string(f,4,hint);
*/


			}

			c.methods.push_back(method);
		}

		List<MethodInfo> signal_list;
		ObjectTypeDB::get_signal_list(name,&signal_list,true);

		if (signal_list.size()) {


			for(List<MethodInfo>::Element *EV=signal_list.front();EV;EV=EV->next()) {

				MethodDoc signal;
				signal.name=EV->get().name;
				for(int i=0;i<EV->get().arguments.size();i++) {

					PropertyInfo arginfo=EV->get().arguments[i];
					ArgumentDoc argument;
					argument.name=arginfo.name;
					argument.type=Variant::get_type_name(arginfo.type);
					signal.arguments.push_back(argument);
				}

				c.signals.push_back(signal);
			}


		}

		List<String> constant_list;
		ObjectTypeDB::get_integer_constant_list(name, &constant_list, true);

		for(List<String>::Element *E=constant_list.front();E;E=E->next()) {

			ConstantDoc constant;
			constant.name=E->get();
			constant.value=itos(ObjectTypeDB::get_integer_constant(name, E->get()));
			c.constants.push_back(constant);
		}

		//theme stuff

		{
			List<StringName> l;
			Theme::get_default()->get_constant_list(cname,&l);
			for (List<StringName>::Element*E=l.front();E;E=E->next()) {

				PropertyDoc pd;
				pd.name=E->get();
				pd.type="int";
				c.theme_properties.push_back(pd);
			}

			l.clear();
			Theme::get_default()->get_color_list(cname,&l);
			for (List<StringName>::Element*E=l.front();E;E=E->next()) {

				PropertyDoc pd;
				pd.name=E->get();
				pd.type="Color";
				c.theme_properties.push_back(pd);
			}

			l.clear();
			Theme::get_default()->get_icon_list(cname,&l);
			for (List<StringName>::Element*E=l.front();E;E=E->next()) {

				PropertyDoc pd;
				pd.name=E->get();
				pd.type="Texture";
				c.theme_properties.push_back(pd);
			}
			l.clear();
			Theme::get_default()->get_font_list(cname,&l);
			for (List<StringName>::Element*E=l.front();E;E=E->next()) {

				PropertyDoc pd;
				pd.name=E->get();
				pd.type="Font";
				c.theme_properties.push_back(pd);
			}
			l.clear();
			Theme::get_default()->get_stylebox_list(cname,&l);
			for (List<StringName>::Element*E=l.front();E;E=E->next()) {

				PropertyDoc pd;
				pd.name=E->get();
				pd.type="StyleBox";
				c.theme_properties.push_back(pd);
			}

		}


		classes.pop_front();
	}


	if (!p_basic_types)
		return;

	for (int i=0;i<Variant::VARIANT_MAX;i++) {

		if (i==Variant::OBJECT)
			continue; //use the core type instead

		int loops=1;

		if (i==Variant::INPUT_EVENT)
			loops=InputEvent::TYPE_MAX;

		for(int j=0;j<loops;j++) {

			String cname=Variant::get_type_name(Variant::Type(i));

			if (i==Variant::INPUT_EVENT) {
				static const char* ie_type[InputEvent::TYPE_MAX]={
					"","Key","MouseMotion","MouseButton","JoystickMotion","JoystickButton","ScreenTouch","ScreenDrag","Action"
				};
				cname+=ie_type[j];
			}


			class_list[cname]=ClassDoc();
			ClassDoc& c = class_list[cname];
			c.name=cname;
			c.category="Built-In Types";

			Variant::CallError cerror;
			Variant v=Variant::construct(Variant::Type(i),NULL,0,cerror);

			if (i==Variant::INPUT_EVENT) {
				v.set("type",j);
			}

			List<MethodInfo> method_list;
			v.get_method_list(&method_list);
			method_list.sort();
			Variant::get_constructor_list(Variant::Type(i),&method_list);


			for(List<MethodInfo>::Element *E=method_list.front();E;E=E->next()) {

				MethodInfo &mi=E->get();
				MethodDoc method;

				method.name=mi.name;

				for(int i=0;i<mi.arguments.size();i++) {

					ArgumentDoc arg;
					PropertyInfo pi=mi.arguments[i];

					arg.name=pi.name;
					//print_line("arg name: "+arg.name);
					if (pi.type==Variant::NIL)
						arg.type="var";
					else
						arg.type=Variant::get_type_name(pi.type);
					int defarg = mi.default_arguments.size() - mi.arguments.size() + i;
					if (defarg >=0)
						arg.default_value=mi.default_arguments[defarg];

					method.arguments.push_back(arg);
				}

				if (mi.return_val.type==Variant::NIL) {
					if (mi.return_val.name!="")
					    method.return_type="var";

				} else {
					method.return_type=Variant::get_type_name(mi.return_val.type);
				}

				c.methods.push_back(method);
			}


			List<PropertyInfo> properties;
			v.get_property_list(&properties);
			for(List<PropertyInfo>::Element *E=properties.front();E;E=E->next()) {

				PropertyInfo pi=E->get();
				PropertyDoc property;
				property.name=pi.name;
				property.type=Variant::get_type_name(pi.type);

				c.properties.push_back(property);
			}

			List<StringName> constants;
			Variant::get_numeric_constants_for_type(Variant::Type(i),&constants);

			for(List<StringName>::Element *E=constants.front();E;E=E->next()) {

				ConstantDoc constant;
				constant.name=E->get();
				constant.value=itos(Variant::get_numeric_constant_value(Variant::Type(i),E->get()));
				c.constants.push_back(constant);
			}
		}

	}

	//built in constants and functions

	{

		String cname="@Global Scope";
		class_list[cname]=ClassDoc();
		ClassDoc& c = class_list[cname];
		c.name=cname;


		for(int i=0;i<GlobalConstants::get_global_constant_count();i++) {

			ConstantDoc cd;
			cd.name=GlobalConstants::get_global_constant_name(i);
			cd.value=itos(GlobalConstants::get_global_constant_value(i));
			c.constants.push_back(cd);
		}

		List<Globals::Singleton> singletons;
		Globals::get_singleton()->get_singletons(&singletons);

		//servers (this is kind of hackish)
		for(List<Globals::Singleton>::Element *E=singletons.front();E;E=E->next()) {

			PropertyDoc pd;
			Globals::Singleton &s=E->get();
			pd.name=s.name;
			pd.type=s.ptr->get_type();
			while (String(ObjectTypeDB::type_inherits_from(pd.type))!="Object")
				pd.type=ObjectTypeDB::type_inherits_from(pd.type);
			if (pd.type.begins_with("_"))
				pd.type=pd.type.substr(1,pd.type.length());
			c.properties.push_back(pd);

		}

	}

	//built in script reference

	{


		for(int i=0;i<ScriptServer::get_language_count();i++) {


			ScriptLanguage *lang = ScriptServer::get_language(i);
			String cname="@"+lang->get_name();
			class_list[cname]=ClassDoc();
			ClassDoc& c = class_list[cname];
			c.name=cname;

			List<MethodInfo> minfo;

			lang->get_public_functions(&minfo);


			for(List<MethodInfo>::Element *E=minfo.front();E;E=E->next()) {

				MethodInfo &mi=E->get();
				MethodDoc md;
				md.name=mi.name;
				if (mi.return_val.name!="")
					md.return_type=mi.return_val.name;
				else if (mi.name.find(":")!=-1) {
					md.return_type=mi.name.get_slice(":",1);
					md.name=mi.name.get_slice(":",0);
				} else
					md.return_type=Variant::get_type_name(mi.return_val.type);

				for(int i=0;i<mi.arguments.size();i++) {

					PropertyInfo &pi=mi.arguments[i];

					ArgumentDoc ad;
					ad.name=pi.name;


					if (pi.type==Variant::NIL)
						ad.type="Variant";
					else
						ad.type=Variant::get_type_name( pi.type );

					md.arguments.push_back(ad);
				}

				c.methods.push_back(md);

			}

			List<Pair<String,Variant> > cinfo;
			lang->get_public_constants(&cinfo);


			for(List<Pair<String,Variant> >::Element *E=cinfo.front();E;E=E->next()) {

				ConstantDoc cd;
				cd.name=E->get().first;
				cd.value=E->get().second;
				c.constants.push_back(cd);
			}
		}
	}


}


static Error _parse_methods(Ref<XMLParser>& parser,Vector<DocData::MethodDoc>& methods) {

	String section=parser->get_node_name();
	String element=section.substr(0,section.length()-1);

	while(parser->read()==OK) {

		if (parser->get_node_type() == XMLParser::NODE_ELEMENT)	{

			if (parser->get_node_name()==element) {

				DocData::MethodDoc method;
				ERR_FAIL_COND_V(!parser->has_attribute("name"),ERR_FILE_CORRUPT);
				method.name=parser->get_attribute_value("name");
				if (parser->has_attribute("qualifiers"))
					method.qualifiers=parser->get_attribute_value("qualifiers");


				while(parser->read()==OK) {

					if (parser->get_node_type() == XMLParser::NODE_ELEMENT)	{

						String name=parser->get_node_name();
						if (name=="return") {

							ERR_FAIL_COND_V(!parser->has_attribute("type"),ERR_FILE_CORRUPT);
							method.return_type=parser->get_attribute_value("type");
						} else if (name=="argument") {

							DocData::ArgumentDoc argument;
							ERR_FAIL_COND_V(!parser->has_attribute("name"),ERR_FILE_CORRUPT);
							argument.name=parser->get_attribute_value("name");
							ERR_FAIL_COND_V(!parser->has_attribute("type"),ERR_FILE_CORRUPT);
							argument.type=parser->get_attribute_value("type");

							method.arguments.push_back(argument);

						} else if (name=="description") {

							parser->read();
							if (parser->get_node_type()==XMLParser::NODE_TEXT)
								method.description=parser->get_node_data().strip_edges();
						}

					} else if (parser->get_node_type() == XMLParser::NODE_ELEMENT_END && parser->get_node_name()==element)
						break;
				}

				methods.push_back(method);

			} else {
				ERR_EXPLAIN("Invalid tag in doc file: "+parser->get_node_name());
				ERR_FAIL_V(ERR_FILE_CORRUPT);
			}

		} else if (parser->get_node_type() == XMLParser::NODE_ELEMENT_END && parser->get_node_name()==section)
			break;
	}

	return OK;
}

Error DocData::load(const String& p_path) {

	Ref<XMLParser> parser=memnew(XMLParser);
	Error err = parser->open(p_path);
	if (err)
		return err;
	return _load(parser);

}
Error DocData::_load(Ref<XMLParser> parser) {

	Error err=OK;

	while((err=parser->read())==OK) {

		if (parser->get_node_type() == XMLParser::NODE_ELEMENT) {

			if (parser->get_node_name() == "doc") {
				break;
			} else if (!parser->is_empty())
				parser->skip_section();// unknown section, likely headers
		}
	}

	if (parser->has_attribute("version"))
		version=parser->get_attribute_value("version");


	while((err=parser->read())==OK) {


		if (parser->get_node_type() == XMLParser::NODE_ELEMENT_END && parser->get_node_name()=="doc")
			break; //end of <doc>

		if (parser->get_node_type() != XMLParser::NODE_ELEMENT)
			continue; //no idea what this may be, but skipping anyway

		ERR_FAIL_COND_V( parser->get_node_name()!="class", ERR_FILE_CORRUPT );

		ERR_FAIL_COND_V( !parser->has_attribute("name"), ERR_FILE_CORRUPT);
		String name = parser->get_attribute_value("name");
		class_list[name]=ClassDoc();
		ClassDoc& c = class_list[name];

//		print_line("class: "+name);
		c.name=name;
		if (parser->has_attribute("inherits"))
			c.inherits = parser->get_attribute_value("inherits");
		if (parser->has_attribute("category"))
			c.category = parser->get_attribute_value("category");

		while(parser->read()==OK) {

			if (parser->get_node_type() == XMLParser::NODE_ELEMENT)	{

				String name = parser->get_node_name();

				if (name=="brief_description") {

					parser->read();
					if (parser->get_node_type()==XMLParser::NODE_TEXT)
						c.brief_description=parser->get_node_data().strip_edges();

				} else if (name=="description") {
					parser->read();
					if (parser->get_node_type()==XMLParser::NODE_TEXT)
						c.description=parser->get_node_data().strip_edges();
				} else if (name=="methods") {

					Error err = _parse_methods(parser,c.methods);
					ERR_FAIL_COND_V(err,err);

				} else if (name=="signals") {

					Error err = _parse_methods(parser,c.signals);
					ERR_FAIL_COND_V(err,err);
				} else if (name=="members") {

					while(parser->read()==OK) {

						if (parser->get_node_type() == XMLParser::NODE_ELEMENT)	{

							String name = parser->get_node_name();

							if (name=="member") {

								PropertyDoc prop;

								ERR_FAIL_COND_V(!parser->has_attribute("name"),ERR_FILE_CORRUPT);
								prop.name=parser->get_attribute_value("name");
								ERR_FAIL_COND_V(!parser->has_attribute("type"),ERR_FILE_CORRUPT);
								prop.type=parser->get_attribute_value("type");
								parser->read();
								if (parser->get_node_type()==XMLParser::NODE_TEXT)
									prop.description=parser->get_node_data().strip_edges();
								c.properties.push_back(prop);
							} else {
								ERR_EXPLAIN("Invalid tag in doc file: "+name);
								ERR_FAIL_V(ERR_FILE_CORRUPT);
							}

						} else if (parser->get_node_type() == XMLParser::NODE_ELEMENT_END && parser->get_node_name()=="members")
							break; //end of <constants>
					}

				} else if (name=="theme_items") {

					while(parser->read()==OK) {

						if (parser->get_node_type() == XMLParser::NODE_ELEMENT)	{

							String name = parser->get_node_name();

							if (name=="theme_item") {

								PropertyDoc prop;

								ERR_FAIL_COND_V(!parser->has_attribute("name"),ERR_FILE_CORRUPT);
								prop.name=parser->get_attribute_value("name");
								ERR_FAIL_COND_V(!parser->has_attribute("type"),ERR_FILE_CORRUPT);
								prop.type=parser->get_attribute_value("type");
								parser->read();
								if (parser->get_node_type()==XMLParser::NODE_TEXT)
									prop.description=parser->get_node_data().strip_edges();
								c.theme_properties.push_back(prop);
							} else {
								ERR_EXPLAIN("Invalid tag in doc file: "+name);
								ERR_FAIL_V(ERR_FILE_CORRUPT);
							}

						} else if (parser->get_node_type() == XMLParser::NODE_ELEMENT_END && parser->get_node_name()=="theme_items")
							break; //end of <constants>
					}

				} else if (name=="constants") {

					while(parser->read()==OK) {

						if (parser->get_node_type() == XMLParser::NODE_ELEMENT)	{

							String name=parser->get_node_name();

							if (name=="constant") {

								ConstantDoc constant;
								ERR_FAIL_COND_V(!parser->has_attribute("name"),ERR_FILE_CORRUPT);
								constant.name=parser->get_attribute_value("name");
								ERR_FAIL_COND_V(!parser->has_attribute("value"),ERR_FILE_CORRUPT);
								constant.value=parser->get_attribute_value("value");
								parser->read();
								if (parser->get_node_type()==XMLParser::NODE_TEXT)
									constant.description=parser->get_node_data().strip_edges();
								c.constants.push_back(constant);
							} else {
								ERR_EXPLAIN("Invalid tag in doc file: "+name);
								ERR_FAIL_V(ERR_FILE_CORRUPT);
							}

						} else if (parser->get_node_type() == XMLParser::NODE_ELEMENT_END && parser->get_node_name()=="constants")
							break; //end of <constants>
					}

				} else {

					ERR_EXPLAIN("Invalid tag in doc file: "+name);
					ERR_FAIL_V(ERR_FILE_CORRUPT);
				}


			} else if (parser->get_node_type() == XMLParser::NODE_ELEMENT_END && parser->get_node_name()=="class")
				break; //end of <asset>
		}


	}

	return OK;
}


static void _write_string(FileAccess *f,int p_tablevel,const String& p_string) {

	String tab;
	for(int i=0;i<p_tablevel;i++) tab+="\t";
	f->store_string(tab+p_string+"\n");
}

Error DocData::save(const String& p_path) {

	Error err;
	FileAccess *f = FileAccess::open(p_path,FileAccess::WRITE,&err);

	if (err) {
		ERR_EXPLAIN("Can't write doc file: "+p_path);

		ERR_FAIL_V(err);

	}

	_write_string(f,0,"<?xml version=\"1.0\" encoding=\"UTF-8\" ?>");
	_write_string(f,0,"<doc version=\""+String(VERSION_MKSTRING)+"\" name=\"Engine Types\">");

	for( Map<String,ClassDoc>::Element *E=class_list.front();E;E=E->next()) {

		ClassDoc &c=E->get();

		String header="<class name=\""+c.name+"\"";
		if (c.inherits!="")
			header+=" inherits=\""+c.inherits+"\"";

		String category=c.category;
		if (c.category=="")
			category="Core";
		header+=" category=\""+category+"\"";
		header+=">";
		_write_string(f,0,header);
		_write_string(f,1,"<brief_description>");
		if (c.brief_description!="")
			_write_string(f,1,c.brief_description.xml_escape());
		_write_string(f,1,"</brief_description>");
		_write_string(f,1,"<description>");
		if (c.description!="")
			_write_string(f,1,c.description.xml_escape());
		_write_string(f,1,"</description>");
		_write_string(f,1,"<methods>");

		for(int i=0;i<c.methods.size();i++) {

			MethodDoc &m=c.methods[i];

			String qualifiers;
			if (m.qualifiers!="")
				qualifiers+=" qualifiers=\""+m.qualifiers.xml_escape()+"\"";

			_write_string(f,2,"<method name=\""+m.name+"\""+qualifiers+">");

			if (m.return_type!="") {

				_write_string(f,3,"<return type=\""+m.return_type+"\">");
				_write_string(f,3,"</return>");
			}

			for(int j=0;j<m.arguments.size();j++) {

				ArgumentDoc &a = m.arguments[j];
				if (a.default_value!="")
					_write_string(f,3,"<argument index=\""+itos(j)+"\" name=\""+a.name.xml_escape()+"\" type=\""+a.type.xml_escape()+"\" default=\""+a.default_value.xml_escape(true)+"\">");
				else
					_write_string(f,3,"<argument index=\""+itos(j)+"\" name=\""+a.name.xml_escape()+"\" type=\""+a.type.xml_escape()+"\">");

				_write_string(f,3,"</argument>");

			}

			_write_string(f,3,"<description>");
			if (m.description!="")
				_write_string(f,3,m.description.xml_escape());
			_write_string(f,3,"</description>");

			_write_string(f,2,"</method>");

		}

		_write_string(f,1,"</methods>");

		if (c.properties.size()) {
			_write_string(f,1,"<members>");

			for(int i=0;i<c.properties.size();i++) {


				PropertyDoc &p=c.properties[i];
				_write_string(f,2,"<member name=\""+p.name+"\" type=\""+p.type+"\">");
				_write_string(f,2,"</member>");

			}
			_write_string(f,1,"</members>");
		}

		if (c.signals.size()) {

			_write_string(f,1,"<signals>");
			for(int i=0;i<c.signals.size();i++) {

				MethodDoc &m=c.signals[i];
				_write_string(f,2,"<signal name=\""+m.name+"\">");
				for(int j=0;j<m.arguments.size();j++) {

					ArgumentDoc &a = m.arguments[j];
						_write_string(f,3,"<argument index=\""+itos(j)+"\" name=\""+a.name.xml_escape()+"\" type=\""+a.type.xml_escape()+"\">");
						_write_string(f,3,"</argument>");

				}

				_write_string(f,3,"<description>");
				if (m.description!="")
					_write_string(f,3,m.description.xml_escape());
				_write_string(f,3,"</description>");

				_write_string(f,2,"</signal>");
			}

			_write_string(f,1,"</signals>");
		}

		_write_string(f,1,"<constants>");

		for(int i=0;i<c.constants.size();i++) {

			ConstantDoc &k=c.constants[i];
			_write_string(f,2,"<constant name=\""+k.name+"\" value=\""+k.value+"\">");
			if (k.description!="")
				_write_string(f,3,k.description.xml_escape());
			_write_string(f,2,"</constant>");
		}

		_write_string(f,1,"</constants>");

		if (c.theme_properties.size()) {
			_write_string(f,1,"<theme_items>");
			for(int i=0;i<c.theme_properties.size();i++) {


				PropertyDoc &p=c.theme_properties[i];
				_write_string(f,2,"<theme_item name=\""+p.name+"\" type=\""+p.type+"\">");
				_write_string(f,2,"</theme_item>");

			}
			_write_string(f,1,"</theme_items>");
		}

		_write_string(f,0,"</class>");

	}

	_write_string(f,0,"</doc>");
	f->close();
	memdelete(f);

	return OK;
}


Error DocData::load_compressed(const uint8_t *p_data, int p_compressed_size, int p_uncompressed_size) {

	Vector<uint8_t> data;
	data.resize(p_uncompressed_size);
	Compression::decompress(data.ptr(),p_uncompressed_size,p_data,p_compressed_size,Compression::MODE_DEFLATE);
	class_list.clear();

	Ref<XMLParser> parser = memnew( XMLParser );
	Error err = parser->open_buffer(data);
	if (err)
		return err;

	_load(parser);

	return OK;

}