90 lines
2.5 KiB
C++
90 lines
2.5 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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* Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
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* $License$
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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 "llmemory.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 filters.
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class LLQueryFilter : public LLRefCount
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{
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public:
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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 : public LLRefCount
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{
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public:
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virtual void operator() (LLView * parent, viewList_t &children) const;
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};
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class LLNoLeavesFilter : public LLQueryFilter, public LLSingleton<LLNoLeavesFilter>
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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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// 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();
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virtual ~LLViewQuery() {}
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void addPreFilter(const LLQueryFilter* prefilter);
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void addPostFilter(const LLQueryFilter* postfilter);
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const filterList_t & getPreFilters() const;
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const filterList_t & getPostFilters() const;
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void setSorter(const LLQuerySorter* sorter);
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const LLQuerySorter* getSorter() const;
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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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protected:
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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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filterResult_t runFilters(LLView * view, const viewList_t children, const filterList_t filters) const;
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protected:
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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
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