From 38d6d37f2d982fa959e9e8a4a3f7e1ccfad7b5d4 Mon Sep 17 00:00:00 2001
From: Jacek Antonelli
Date: Fri, 15 Aug 2008 23:44:46 -0500
Subject: Second Life viewer sources 1.13.2.12

---
 linden/indra/llui/llviewquery.h | 108 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 linden/indra/llui/llviewquery.h

(limited to 'linden/indra/llui/llviewquery.h')

diff --git a/linden/indra/llui/llviewquery.h b/linden/indra/llui/llviewquery.h
new file mode 100644
index 0000000..3dc2861
--- /dev/null
+++ b/linden/indra/llui/llviewquery.h
@@ -0,0 +1,108 @@
+/** 
+ * @file llviewquery.h
+ * @brief Query algorithm for flattening and filtering the view hierarchy.
+ *
+ * Copyright (c) 2001-2007, Linden Research, Inc.
+ * 
+ * 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://secondlife.com/developers/opensource/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://secondlife.com/developers/opensource/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.
+ */
+
+#ifndef LL_LLVIEWQUERY_H
+#define LL_LLVIEWQUERY_H
+
+#include <list>	
+
+#include "llmemory.h"
+
+class LLView;
+
+typedef std::list<LLView *>			viewList_t;
+typedef std::pair<BOOL, BOOL>		filterResult_t;
+
+// Abstract base class for all filters.
+class LLQueryFilter : public LLRefCount
+{
+public:
+	virtual filterResult_t operator() (const LLView* const view, const viewList_t & children) const =0;
+};
+
+class LLQuerySorter : public LLRefCount
+{
+public:
+	virtual void operator() (LLView * parent, viewList_t &children) const;
+};
+
+class LLNoLeavesFilter : public LLQueryFilter, public LLSingleton<LLNoLeavesFilter>
+{
+	/*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;
+};
+
+// 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();
+	virtual ~LLViewQuery() {}
+
+	void addPreFilter(const LLQueryFilter* prefilter);
+	void addPostFilter(const LLQueryFilter* postfilter);
+	const filterList_t & getPreFilters() const;
+	const filterList_t & getPostFilters() const;
+
+	void setSorter(const LLQuerySorter* sorter);
+	const LLQuerySorter* getSorter() const;
+
+	viewList_t run(LLView * view) const;
+	// syntactic sugar
+	viewList_t operator () (LLView * view) const { return run(view); }
+protected:
+	// override this method to provide iteration over other types of children
+	virtual void filterChildren(LLView * view, viewList_t & filtered_children) const;
+	filterResult_t runFilters(LLView * view, const viewList_t children, const filterList_t filters) const;
+protected:
+	filterList_t mPreFilters;
+	filterList_t mPostFilters;
+	const LLQuerySorter* mSorterp;
+};
+
+class LLCtrlQuery : public LLViewQuery
+{
+public:
+	LLCtrlQuery();
+};
+
+#endif
-- 
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