137 lines
4.2 KiB
C++
137 lines
4.2 KiB
C++
/**
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* @file llviewquery.h
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* @brief Query algorithm for flattening and filtering the view hierarchy.
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*
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* $LicenseInfo:firstyear=2001&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#ifndef LL_LLVIEWQUERY_H
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#define LL_LLVIEWQUERY_H
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#include <list>
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#include "llsingleton.h"
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#include "llui.h"
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class LLView;
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typedef std::list<LLView *> viewList_t;
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typedef std::pair<BOOL, BOOL> filterResult_t;
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// Abstract base class for all query filters.
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class LLQueryFilter
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{
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public:
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virtual ~LLQueryFilter() {};
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virtual filterResult_t operator() (const LLView* const view, const viewList_t & children) const = 0;
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};
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class LLQuerySorter
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{
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public:
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virtual ~LLQuerySorter() {};
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virtual void operator() (LLView * parent, viewList_t &children) const;
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};
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class LLLeavesFilter : public LLQueryFilter, public LLSingleton<LLLeavesFilter>
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{
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/*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const;
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};
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class LLRootsFilter : public LLQueryFilter, public LLSingleton<LLRootsFilter>
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{
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/*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const;
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};
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class LLVisibleFilter : public LLQueryFilter, public LLSingleton<LLVisibleFilter>
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{
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/*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const;
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};
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class LLEnabledFilter : public LLQueryFilter, public LLSingleton<LLEnabledFilter>
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{
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/*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const;
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};
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class LLTabStopFilter : public LLQueryFilter, public LLSingleton<LLTabStopFilter>
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{
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/*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const;
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};
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class LLCtrlFilter : public LLQueryFilter, public LLSingleton<LLCtrlFilter>
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{
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/*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const;
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};
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template <class T>
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class LLWidgetTypeFilter : public LLQueryFilter
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{
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/*virtual*/ filterResult_t operator() (const LLView* const view, const viewList_t & children) const
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{
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return filterResult_t(dynamic_cast<const T*>(view) != NULL, TRUE);
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}
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};
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// Algorithm for flattening
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class LLViewQuery
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{
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public:
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typedef std::list<const LLQueryFilter*> filterList_t;
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typedef filterList_t::iterator filterList_iter_t;
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typedef filterList_t::const_iterator filterList_const_iter_t;
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LLViewQuery() : mPreFilters(), mPostFilters(), mSorterp() {}
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virtual ~LLViewQuery() {}
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void addPreFilter(const LLQueryFilter* prefilter) { mPreFilters.push_back(prefilter); }
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void addPostFilter(const LLQueryFilter* postfilter) { mPostFilters.push_back(postfilter); }
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const filterList_t & getPreFilters() const { return mPreFilters; }
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const filterList_t & getPostFilters() const { return mPostFilters; }
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void setSorter(const LLQuerySorter* sorter) { mSorterp = sorter; }
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const LLQuerySorter* getSorter() const { return mSorterp; }
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viewList_t run(LLView * view) const;
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// syntactic sugar
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viewList_t operator () (LLView * view) const { return run(view); }
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// override this method to provide iteration over other types of children
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virtual void filterChildren(LLView * view, viewList_t& filtered_children) const;
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private:
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filterResult_t runFilters(LLView * view, const viewList_t children, const filterList_t filters) const;
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filterList_t mPreFilters;
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filterList_t mPostFilters;
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const LLQuerySorter* mSorterp;
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};
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class LLCtrlQuery : public LLViewQuery
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{
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public:
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LLCtrlQuery();
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};
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#endif // LL_LLVIEWQUERY_H
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