lluictrlfactory.h
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- /**
- * @file lluictrlfactory.h
- * @brief Factory class for creating UI controls
- *
- * $LicenseInfo:firstyear=2003&license=viewergpl$
- *
- * Copyright (c) 2003-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #ifndef LLUICTRLFACTORY_H
- #define LLUICTRLFACTORY_H
- #include "llcallbackmap.h"
- #include "llinitparam.h"
- #include "llregistry.h"
- #include "v4color.h"
- #include "llfasttimer.h"
- #include "llxuiparser.h"
- #include <boost/function.hpp>
- #include <iosfwd>
- #include <stack>
- #include <set>
- class LLPanel;
- class LLFloater;
- class LLView;
- // sort functor for typeid maps
- struct LLCompareTypeID
- {
- bool operator()(const std::type_info* lhs, const std::type_info* rhs) const
- {
- return lhs->before(*rhs);
- }
- };
- // lookup widget constructor funcs by widget name
- template <typename DERIVED_TYPE>
- class LLChildRegistry : public LLRegistrySingleton<std::string, LLWidgetCreatorFunc, DERIVED_TYPE>
- {
- public:
- typedef LLRegistrySingleton<std::string, LLWidgetCreatorFunc, DERIVED_TYPE> super_t;
- // local static instance for registering a particular widget
- template<typename T>
- class Register : public super_t::StaticRegistrar
- {
- public:
- // register with either the provided builder, or the generic templated builder
- Register(const char* tag, LLWidgetCreatorFunc func = NULL);
- };
- protected:
- LLChildRegistry() {}
- };
- class LLDefaultChildRegistry : public LLChildRegistry<LLDefaultChildRegistry>
- {
- protected:
- LLDefaultChildRegistry(){}
- friend class LLSingleton<LLDefaultChildRegistry>;
- };
- // lookup widget name by type
- class LLWidgetNameRegistry
- : public LLRegistrySingleton<const std::type_info*, std::string, LLWidgetNameRegistry , LLCompareTypeID>
- {};
- // lookup factory functions for default widget instances by widget type
- typedef LLView* (*dummy_widget_creator_func_t)(const std::string&);
- class LLDefaultWidgetRegistry
- : public LLRegistrySingleton<const std::type_info*, dummy_widget_creator_func_t, LLDefaultWidgetRegistry, LLCompareTypeID>
- {};
- // lookup function for generating empty param block by widget type
- // this is used for schema generation
- //typedef const LLInitParam::BaseBlock& (*empty_param_block_func_t)();
- //class LLDefaultParamBlockRegistry
- //: public LLRegistrySingleton<const std::type_info*, empty_param_block_func_t, LLDefaultParamBlockRegistry, LLCompareTypeID>
- //{};
- extern LLFastTimer::DeclareTimer FTM_WIDGET_SETUP;
- extern LLFastTimer::DeclareTimer FTM_WIDGET_CONSTRUCTION;
- extern LLFastTimer::DeclareTimer FTM_INIT_FROM_PARAMS;
- // Build time optimization, generate this once in .cpp file
- #ifndef LLUICTRLFACTORY_CPP
- extern template class LLUICtrlFactory* LLSingleton<class LLUICtrlFactory>::getInstance();
- #endif
- class LLUICtrlFactory : public LLSingleton<LLUICtrlFactory>
- {
- private:
- friend class LLSingleton<LLUICtrlFactory>;
- LLUICtrlFactory();
- ~LLUICtrlFactory();
- // only partial specialization allowed in inner classes, so use extra dummy parameter
- template <typename PARAM_BLOCK, int DUMMY>
- class ParamDefaults : public LLSingleton<ParamDefaults<PARAM_BLOCK, DUMMY> >
- {
- public:
- ParamDefaults()
- {
- // recursively initialize from base class param block
- ((typename PARAM_BLOCK::base_block_t&)mPrototype).fillFrom(ParamDefaults<typename PARAM_BLOCK::base_block_t, DUMMY>::instance().get());
- // after initializing base classes, look up template file for this param block
- const std::string* param_block_tag = getWidgetTag(&typeid(PARAM_BLOCK));
- if (param_block_tag)
- {
- LLUICtrlFactory::loadWidgetTemplate(*param_block_tag, mPrototype);
- }
- }
- const PARAM_BLOCK& get() { return mPrototype; }
- private:
- PARAM_BLOCK mPrototype;
- };
- // base case for recursion, there are NO base classes of LLInitParam::BaseBlock
- template<int DUMMY>
- class ParamDefaults<LLInitParam::BaseBlock, DUMMY> : public LLSingleton<ParamDefaults<LLInitParam::BaseBlock, DUMMY> >
- {
- public:
- const LLInitParam::BaseBlock& get() { return mBaseBlock; }
- private:
- LLInitParam::BaseBlock mBaseBlock;
- };
- public:
- // get default parameter block for widget of a specific type
- template<typename T>
- static const typename T::Params& getDefaultParams()
- {
- //#pragma message("Generating ParamDefaults")
- return ParamDefaults<typename T::Params, 0>::instance().get();
- }
- bool buildFloater(LLFloater* floaterp, const std::string &filename, LLXMLNodePtr output_node);
- BOOL buildPanel(LLPanel* panelp, const std::string &filename, LLXMLNodePtr output_node = NULL);
- // Does what you want for LLFloaters and LLPanels
- // Returns 0 on success
- S32 saveToXML(LLView* viewp, const std::string& filename);
- std::string getCurFileName() { return mFileNames.empty() ? "" : mFileNames.back(); }
- static BOOL getAttributeColor(LLXMLNodePtr node, const std::string& name, LLColor4& color);
- LLPanel* createFactoryPanel(const std::string& name);
- void pushFactoryFunctions(const LLCallbackMap::map_t* map);
- void popFactoryFunctions();
- template<typename T>
- static T* createWidget(typename T::Params& params, LLView* parent = NULL)
- {
- T* widget = NULL;
- if (!params.validateBlock())
- {
- llwarns << getInstance()->getCurFileName() << ": Invalid parameter block for " << typeid(T).name() << llendl;
- //return NULL;
- }
- {
- LLFastTimer timer(FTM_WIDGET_CONSTRUCTION);
- widget = new T(params);
- }
- {
- LLFastTimer timer(FTM_INIT_FROM_PARAMS);
- widget->initFromParams(params);
- }
- if (parent)
- {
- S32 tab_group = params.tab_group.isProvided() ? params.tab_group() : S32_MAX;
- setCtrlParent(widget, parent, tab_group);
- }
- return widget;
- }
- template<typename T>
- static T* create(typename T::Params& params, LLView* parent = NULL)
- {
- params.fillFrom(ParamDefaults<typename T::Params, 0>::instance().get());
- T* widget = createWidget<T>(params, parent);
- if (widget)
- {
- widget->postBuild();
- }
- return widget;
- }
- LLView* createFromXML(LLXMLNodePtr node, LLView* parent, const std::string& filename, const widget_registry_t&, LLXMLNodePtr output_node );
- template<typename T>
- static T* createFromFile(const std::string &filename, LLView *parent, const widget_registry_t& registry, LLXMLNodePtr output_node = NULL)
- {
- T* widget = NULL;
- std::string skinned_filename = findSkinnedFilename(filename);
- getInstance()->mFileNames.push_back(skinned_filename);
- {
- LLXMLNodePtr root_node;
- //if exporting, only load the language being exported,
- //instead of layering localized version on top of english
- if (output_node)
- {
- if (!LLUICtrlFactory::getLocalizedXMLNode(filename, root_node))
- {
- llwarns << "Couldn't parse XUI file: " << filename << llendl;
- goto fail;
- }
- }
- else if (!LLUICtrlFactory::getLayeredXMLNode(filename, root_node))
- {
- llwarns << "Couldn't parse XUI file: " << skinned_filename << llendl;
- goto fail;
- }
-
- LLView* view = getInstance()->createFromXML(root_node, parent, filename, registry, output_node);
- if (view)
- {
- widget = dynamic_cast<T*>(view);
- // not of right type, so delete it
- if (!widget)
- {
- delete view;
- view = NULL;
- }
-
- }
- }
- fail:
- getInstance()->mFileNames.pop_back();
- return widget;
- }
- template<class T>
- static T* getDefaultWidget(const std::string& name)
- {
- dummy_widget_creator_func_t* dummy_func = getDefaultWidgetFunc(&typeid(T));
- return dummy_func ? dynamic_cast<T*>((*dummy_func)(name)) : NULL;
- }
- template <class T>
- static LLView* createDefaultWidget(const std::string& name)
- {
- typename T::Params params;
- params.name(name);
-
- return create<T>(params);
- }
- static void copyName(LLXMLNodePtr src, LLXMLNodePtr dest);
- template<typename T>
- static T* defaultBuilder(LLXMLNodePtr node, LLView *parent, LLXMLNodePtr output_node)
- {
- LLFastTimer timer(FTM_WIDGET_SETUP);
- typename T::Params params(getDefaultParams<T>());
- LLXUIParser::instance().readXUI(node, params, LLUICtrlFactory::getInstance()->getCurFileName());
- if (output_node)
- {
- // We always want to output top-left coordinates
- typename T::Params output_params(params);
- T::setupParamsForExport(output_params, parent);
- // Export only the differences between this any default params
- typename T::Params default_params(getDefaultParams<T>());
- copyName(node, output_node);
- LLXUIParser::instance().writeXUI(
- output_node, output_params, &default_params);
- }
- // Apply layout transformations, usually munging rect
- params.from_xui = true;
- T::applyXUILayout(params, parent);
- T* widget = createWidget<T>(params, parent);
- typedef typename T::child_registry_t registry_t;
- createChildren(widget, node, registry_t::instance(), output_node);
- if (widget && !widget->postBuild())
- {
- delete widget;
- widget = NULL;
- }
- return widget;
- }
- static void createChildren(LLView* viewp, LLXMLNodePtr node, const widget_registry_t&, LLXMLNodePtr output_node = NULL);
- static bool getLayeredXMLNode(const std::string &filename, LLXMLNodePtr& root);
-
- static bool getLocalizedXMLNode(const std::string &xui_filename, LLXMLNodePtr& root);
- static void loadWidgetTemplate(const std::string& widget_tag, LLInitParam::BaseBlock& block);
- // helper function for adding widget type info to various registries
- static void registerWidget(const std::type_info* widget_type, const std::type_info* param_block_type, dummy_widget_creator_func_t creator_func, const std::string& tag);
- private:
- // return default widget instance factory func for a given type
- static dummy_widget_creator_func_t* getDefaultWidgetFunc(const std::type_info* widget_type);
- static const std::string* getWidgetTag(const std::type_info* widget_type);
- // this exists to get around dependency on llview
- static void setCtrlParent(LLView* view, LLView* parent, S32 tab_group);
- // Avoid directly using LLUI and LLDir in the template code
- static std::string findSkinnedFilename(const std::string& filename);
- typedef std::deque<const LLCallbackMap::map_t*> factory_stack_t;
- factory_stack_t mFactoryStack;
- LLPanel* mDummyPanel;
- std::vector<std::string> mFileNames;
- };
- template<typename T>
- const LLInitParam::BaseBlock& getEmptyParamBlock()
- {
- static typename T::Params params;
- return params;
- }
- // this is here to make gcc happy with reference to LLUICtrlFactory
- template<typename DERIVED>
- template<typename T>
- LLChildRegistry<DERIVED>::Register<T>::Register(const char* tag, LLWidgetCreatorFunc func)
- : LLChildRegistry<DERIVED>::StaticRegistrar(tag, func.empty() ? (LLWidgetCreatorFunc)&LLUICtrlFactory::defaultBuilder<T> : func)
- {
- // add this widget to various registries
- LLUICtrlFactory::instance().registerWidget(&typeid(T), &typeid(typename T::Params), &LLUICtrlFactory::createDefaultWidget<T>, tag);
-
- // since registry_t depends on T, do this in line here
- typedef typename T::child_registry_t registry_t;
- LLChildRegistryRegistry::instance().defaultRegistrar().add(&typeid(T), registry_t::instance());
- }
- typedef boost::function<LLPanel* (void)> LLPanelClassCreatorFunc;
- // local static instance for registering a particular panel class
- class LLRegisterPanelClass
- : public LLSingleton< LLRegisterPanelClass >
- {
- public:
- // reigister with either the provided builder, or the generic templated builder
- void addPanelClass(const std::string& tag,LLPanelClassCreatorFunc func)
- {
- mPanelClassesNames[tag] = func;
- }
- LLPanel* createPanelClass(const std::string& tag)
- {
- param_name_map_t::iterator iT = mPanelClassesNames.find(tag);
- if(iT == mPanelClassesNames.end())
- return 0;
- return iT->second();
- }
- template<typename T>
- static T* defaultPanelClassBuilder()
- {
- T* pT = new T();
- return pT;
- }
- private:
- typedef std::map< std::string, LLPanelClassCreatorFunc> param_name_map_t;
-
- param_name_map_t mPanelClassesNames;
- };
- // local static instance for registering a particular panel class
- template<typename T>
- class LLRegisterPanelClassWrapper
- : public LLRegisterPanelClass
- {
- public:
- // reigister with either the provided builder, or the generic templated builder
- LLRegisterPanelClassWrapper(const std::string& tag);
- };
- template<typename T>
- LLRegisterPanelClassWrapper<T>::LLRegisterPanelClassWrapper(const std::string& tag)
- {
- LLRegisterPanelClass::instance().addPanelClass(tag,&LLRegisterPanelClass::defaultPanelClassBuilder<T>);
- }
- #endif //LLUICTRLFACTORY_H