llviewquery.h
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- /**
- * @file llviewquery.h
- * @brief Query algorithm for flattening and filtering the view hierarchy.
- *
- * $LicenseInfo:firstyear=2001&license=viewergpl$
- *
- * Copyright (c) 2001-2010, 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 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 operator() (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;
- };
- class LLCtrlQuery : public LLViewQuery
- {
- public:
- LLCtrlQuery();
- };
- #endif // LL_LLVIEWQUERY_H