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+/** 
+ * @file lluistring.h
+ * @author: Steve Bennetts
+ * @brief LLUIString base class
+ *
+ * Copyright (c) 2006-2007, 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_LLUISTRING_H
+#define LL_LLUISTRING_H
+
+// lluistring.h
+//
+// Copyright 2006, Linden Research, Inc.
+// Original aurthor: Steve
+
+#include "stdtypes.h"
+#include "llstring.h"
+#include <string>
+
+// Use this class to store translated text that may have arguments
+// e.g. "Welcome [USERNAME] to [SECONDLIFE]!"
+
+// Adding or changing an argument will update the result string, preserving the origianl
+// Thus, subsequent changes to arguments or even the original string will produce
+//  the correct result
+
+// Example Usage:
+// LLUIString mMessage("Welcome [USERNAME] to [SECONDLIFE]!");
+// mMessage.setArg("[USERNAME]", "Steve");
+// mMessage.setArg("[SECONDLIFE]", "Second Life");
+// llinfos << mMessage.getString().c_str() << llendl; // outputs "Welcome Steve to Second Life"
+// mMessage.setArg("[USERNAME]", "Joe");
+// llinfos << mMessage.getString().c_str() << llendl; // outputs "Welcome Joe to Second Life"
+// mMessage = "Recepción a la [SECONDLIFE] [USERNAME]"
+// mMessage.setArg("[SECONDLIFE]", "Segunda Vida");
+// llinfos << mMessage.getString().c_str() << llendl; // outputs "Recepción a la Segunda Vida Joe"
+
+// Implementation Notes:
+// Attempting to have operator[](const LLString& s) return mArgs[s] fails because we have
+// to call format() after the assignment happens.
+
+class LLUIString
+{
+public:
+        // These methods all perform appropriate argument substitution
+        // and modify mOrig where appropriate
+        LLUIString() {}
+        LLUIString(const LLString& instring, const LLString::format_map_t& args);
+        LLUIString(const LLString& instring) { assign(instring); }
+
+        void assign(const LLString& instring);
+        LLUIString& operator=(const LLString& s) { assign(s); return *this; }
+
+        void setArgList(const LLString::format_map_t& args);
+        void setArg(const LLString& key, const LLString& replacement);
+
+        const LLString& getString() const { return mResult; }
+        operator LLString() const { return mResult; }
+
+        const LLWString& getWString() const { return mWResult; }
+        operator LLWString() const { return mWResult; }
+
+        bool empty() const { return mWResult.empty(); }
+        S32 length() const { return mWResult.size(); }
+
+        void clear();
+        void clearArgs();
+        
+        // These utuilty functions are included for text editing.
+        // They do not affect mOrig and do not perform argument substitution
+        void truncate(S32 maxchars);
+        void erase(S32 charidx, S32 len);
+        void insert(S32 charidx, const LLWString& wchars);
+        void replace(S32 charidx, llwchar wc);
+        
+private:
+        void format();  
+        
+        LLString mOrig;
+        LLString mResult;
+        LLWString mWResult; // for displaying
+        LLString::format_map_t mArgs;
+};
+
+#endif // LL_LLUISTRING_H