/** * @file llviewquery.h * @brief Query algorithm for flattening and filtering the view hierarchy. * * $LicenseInfo:firstyear=2001&license=viewerlgpl$ * 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 LL_LLVIEWQUERY_H #define LL_LLVIEWQUERY_H #include <list> #include "llsingleton.h" #include "llui.h" class LLView; typedef std::list<LLView *> viewList_t; typedef std::pair<BOOL, BOOL> filterResult_t; // Abstract base class for all query filters. class LLQueryFilter { public: virtual ~LLQueryFilter() {}; virtual filterResult_t operator() (const LLView* const view, const viewList_t & children) const = 0; }; class LLQuerySorter { public: virtual ~LLQuerySorter() {}; virtual void sort(LLView * parent, viewList_t &children) const; }; class LLLeavesFilter : public LLQueryFilter, public LLSingleton<LLLeavesFilter> { /*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const; }; class LLRootsFilter : public LLQueryFilter, public LLSingleton<LLRootsFilter> { /*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const; }; class LLVisibleFilter : public LLQueryFilter, public LLSingleton<LLVisibleFilter> { /*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const; }; class LLEnabledFilter : public LLQueryFilter, public LLSingleton<LLEnabledFilter> { /*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const; }; class LLTabStopFilter : public LLQueryFilter, public LLSingleton<LLTabStopFilter> { /*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const; }; class LLCtrlFilter : public LLQueryFilter, public LLSingleton<LLCtrlFilter> { /*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const; }; template <class T> class LLWidgetTypeFilter : public LLQueryFilter { /*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const { return filterResult_t(dynamic_cast<const T*>(view) != NULL, TRUE); } }; // Algorithm for flattening class LLViewQuery { public: typedef std::list<const LLQueryFilter*> filterList_t; typedef filterList_t::iterator filterList_iter_t; typedef filterList_t::const_iterator filterList_const_iter_t; LLViewQuery() : mPreFilters(), mPostFilters(), mSorterp() {} virtual ~LLViewQuery() {} void addPreFilter(const LLQueryFilter* prefilter) { mPreFilters.push_back(prefilter); } void addPostFilter(const LLQueryFilter* postfilter) { mPostFilters.push_back(postfilter); } const filterList_t & getPreFilters() const { return mPreFilters; } const filterList_t & getPostFilters() const { return mPostFilters; } void setSorter(const LLQuerySorter* sorter) { mSorterp = sorter; } const LLQuerySorter* getSorter() const { return mSorterp; } viewList_t run(LLView * view) const; // syntactic sugar viewList_t operator () (LLView * view) const { return run(view); } // override this method to provide iteration over other types of children virtual void filterChildren(LLView * view, viewList_t& filtered_children) const; private: filterResult_t runFilters(LLView * view, const viewList_t children, const filterList_t filters) const; filterList_t mPreFilters; filterList_t mPostFilters; const LLQuerySorter* mSorterp; }; #endif // LL_LLVIEWQUERY_H