/**
* @file llxuiparser.h
* @brief Utility functions for handling XUI structures in XML
*
* $LicenseInfo:firstyear=2003&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LLXUIPARSER_H
#define LLXUIPARSER_H
#include "llinitparam.h"
#include "llregistry.h"
#include "llxmlnode.h"
#include <boost/function.hpp>
#include <iosfwd>
#include <stack>
#include <set>
class LLView;
// lookup widget type by name
class LLWidgetTypeRegistry
: public LLRegistrySingleton<std::string, const std::type_info*, LLWidgetTypeRegistry>
{
LLSINGLETON_EMPTY_CTOR(LLWidgetTypeRegistry);
};
// global static instance for registering all widget types
typedef boost::function<LLView* (LLXMLNodePtr node, LLView *parent, LLXMLNodePtr output_node)> LLWidgetCreatorFunc;
typedef LLRegistry<std::string, LLWidgetCreatorFunc> widget_registry_t;
class LLChildRegistryRegistry
: public LLRegistrySingleton<const std::type_info*, widget_registry_t, LLChildRegistryRegistry>
{
LLSINGLETON_EMPTY_CTOR(LLChildRegistryRegistry);
};
class LLXSDWriter : public LLInitParam::Parser
{
LOG_CLASS(LLXSDWriter);
public:
void writeXSD(const std::string& name, LLXMLNodePtr node, const LLInitParam::BaseBlock& block, const std::string& xml_namespace);
/*virtual*/ std::string getCurrentElementName() { return LLStringUtil::null; }
/*virtual*/ std::string getCurrentFileName() { return LLStringUtil::null; }
LLXSDWriter();
~LLXSDWriter();
protected:
void writeAttribute(const std::string& type, const Parser::name_stack_t&, S32 min_count, S32 max_count, const std::vector<std::string>* possible_values);
void addAttributeToSchema(LLXMLNodePtr nodep, const std::string& attribute_name, const std::string& type, bool mandatory, const std::vector<std::string>* possible_values);
LLXMLNodePtr mAttributeNode;
LLXMLNodePtr mElementNode;
LLXMLNodePtr mSchemaNode;
typedef std::set<std::string> string_set_t;
typedef std::map<LLXMLNodePtr, string_set_t> attributes_map_t;
attributes_map_t mAttributesWritten;
};
// NOTE: DOES NOT WORK YET
// should support child widgets for XUI
class LLXUIXSDWriter : public LLXSDWriter
{
public:
void writeXSD(const std::string& name, const std::string& path, const LLInitParam::BaseBlock& block);
};
class LLXUIParserImpl;
class LLXUIParser : public LLInitParam::Parser
{
LOG_CLASS(LLXUIParser);
public:
LLXUIParser();
typedef LLInitParam::Parser::name_stack_t name_stack_t;
/*virtual*/ std::string getCurrentElementName();
/*virtual*/ std::string getCurrentFileName() { return mCurFileName; }
/*virtual*/ void parserWarning(const std::string& message);
/*virtual*/ void parserError(const std::string& message);
void readXUI(LLXMLNodePtr node, LLInitParam::BaseBlock& block, const std::string& filename = LLStringUtil::null, bool silent=false);
template<typename BLOCK>
void writeXUI(LLXMLNodePtr node,
const BLOCK& block,
const LLInitParam::predicate_rule_t rules = LLInitParam::default_parse_rules(),
const LLInitParam::BaseBlock* diff_block = NULL)
{
if (!diff_block
&& !rules.isAmbivalent(LLInitParam::HAS_DEFAULT_VALUE))
{
diff_block = &LLInitParam::defaultValue<BLOCK>();
}
writeXUIImpl(node, block, rules, diff_block);
}
private:
LLXUIParser(const LLXUIParser& other); // no-copy
void writeXUIImpl(LLXMLNodePtr node,
const LLInitParam::BaseBlock& block,
const LLInitParam::predicate_rule_t rules,
const LLInitParam::BaseBlock* diff_block);
bool readXUIImpl(LLXMLNodePtr node, LLInitParam::BaseBlock& block);
bool readAttributes(LLXMLNodePtr nodep, LLInitParam::BaseBlock& block);
//reader helper functions
static bool readFlag(Parser& parser, void* val_ptr);
static bool readBoolValue(Parser& parser, void* val_ptr);
static bool readStringValue(Parser& parser, void* val_ptr);
static bool readU8Value(Parser& parser, void* val_ptr);
static bool readS8Value(Parser& parser, void* val_ptr);
static bool readU16Value(Parser& parser, void* val_ptr);
static bool readS16Value(Parser& parser, void* val_ptr);
static bool readU32Value(Parser& parser, void* val_ptr);
static bool readS32Value(Parser& parser, void* val_ptr);
static bool readF32Value(Parser& parser, void* val_ptr);
static bool readF64Value(Parser& parser, void* val_ptr);
static bool readVector3Value(Parser& parser, void* val_ptr);
static bool readColor4Value(Parser& parser, void* val_ptr);
static bool readUIColorValue(Parser& parser, void* val_ptr);
static bool readUUIDValue(Parser& parser, void* val_ptr);
static bool readSDValue(Parser& parser, void* val_ptr);
//writer helper functions
static bool writeFlag(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeBoolValue(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeStringValue(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeU8Value(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeS8Value(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeU16Value(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeS16Value(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeU32Value(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeS32Value(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeF32Value(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeF64Value(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeVector3Value(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeColor4Value(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeUIColorValue(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeUUIDValue(Parser& parser, const void* val_ptr, name_stack_t&);
static bool writeSDValue(Parser& parser, const void* val_ptr, name_stack_t&);
LLXMLNodePtr getNode(name_stack_t& stack);
private:
Parser::name_stack_t mNameStack;
LLXMLNodePtr mCurReadNode;
// Root of the widget XML sub-tree, for example, "line_editor"
LLXMLNodePtr mWriteRootNode;
typedef std::map<std::string, LLXMLNodePtr> out_nodes_t;
out_nodes_t mOutNodes;
LLXMLNodePtr mLastWrittenChild;
S32 mCurReadDepth;
std::string mCurFileName;
std::string mRootNodeName;
};
// LLSimpleXUIParser is a streamlined SAX-based XUI parser that does not support localization
// or parsing of a tree of independent param blocks, such as child widgets.
// Use this for reading non-localized files that only need a single param block as a result.
//
// NOTE: In order to support nested block parsing, we need callbacks for start element that
// push new blocks contexts on the mScope stack.
// NOTE: To support localization without building a DOM, we need to enforce consistent
// ordering of child elements from base file to localized diff file. Then we can use a pair
// of coroutines to perform matching of xml nodes during parsing. Not sure if the overhead
// of coroutines would offset the gain from SAX parsing
class LLSimpleXUIParserImpl;
class LLSimpleXUIParser : public LLInitParam::Parser
{
LOG_CLASS(LLSimpleXUIParser);
public:
typedef LLInitParam::Parser::name_stack_t name_stack_t;
typedef LLInitParam::BaseBlock* (*element_start_callback_t)(LLSimpleXUIParser&, const char* block_name);
LLSimpleXUIParser(element_start_callback_t element_cb = NULL);
virtual ~LLSimpleXUIParser();
/*virtual*/ std::string getCurrentElementName();
/*virtual*/ std::string getCurrentFileName() { return mCurFileName; }
/*virtual*/ void parserWarning(const std::string& message);
/*virtual*/ void parserError(const std::string& message);
bool readXUI(const std::string& filename, LLInitParam::BaseBlock& block, bool silent=false);
private:
//reader helper functions
static bool readFlag(Parser&, void* val_ptr);
static bool readBoolValue(Parser&, void* val_ptr);
static bool readStringValue(Parser&, void* val_ptr);
static bool readU8Value(Parser&, void* val_ptr);
static bool readS8Value(Parser&, void* val_ptr);
static bool readU16Value(Parser&, void* val_ptr);
static bool readS16Value(Parser&, void* val_ptr);
static bool readU32Value(Parser&, void* val_ptr);
static bool readS32Value(Parser&, void* val_ptr);
static bool readF32Value(Parser&, void* val_ptr);
static bool readF64Value(Parser&, void* val_ptr);
static bool readColor4Value(Parser&, void* val_ptr);
static bool readUIColorValue(Parser&, void* val_ptr);
static bool readUUIDValue(Parser&, void* val_ptr);
static bool readSDValue(Parser&, void* val_ptr);
private:
static void startElementHandler(void *userData, const char *name, const char **atts);
static void endElementHandler(void *userData, const char *name);
static void characterDataHandler(void *userData, const char *s, int len);
void startElement(const char *name, const char **atts);
void endElement(const char *name);
void characterData(const char *s, int len);
bool readAttributes(const char **atts);
bool processText();
Parser::name_stack_t mNameStack;
struct XML_ParserStruct* mParser;
LLXMLNodePtr mLastWrittenChild;
S32 mCurReadDepth;
std::string mCurFileName;
std::string mTextContents;
const char* mCurAttributeValueBegin;
std::vector<S32> mTokenSizeStack;
std::vector<std::string> mScope;
std::vector<bool> mEmptyLeafNode;
element_start_callback_t mElementCB;
std::vector<std::pair<LLInitParam::BaseBlock*, S32> > mOutputStack;
};
#endif //LLXUIPARSER_H