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+/** 
+ * @file llchatmsgbox.h
+ * @author Martin Reddy
+ * @brief chat history text box, able to show array of strings with separator
+ *
+ * $LicenseInfo:firstyear=2009&license=viewergpl$
+ * 
+ * Copyright (c) 2009, 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_LLCHATMSGBOX_H
+#define LL_LLCHATMSGBOX_H
+
+#include "lltextbox.h"
+#include "lluictrl.h"
+#include "v4color.h"
+#include "llstring.h"
+
+///
+/// LLChatMsgBox provides a text box with support for multiple blocks
+/// of text that can be added incrementally. Each block of text is
+/// visual separated from the previous block (e.g., with a horizontal
+/// line).
+///
+class LLChatMsgBox :
+	public LLTextBox
+{
+public:
+	struct Params : public LLInitParam::Block<Params, LLTextBox::Params>
+	{
+		Optional<S32>	block_spacing;
+
+		Params();
+	};
+
+protected:
+	LLChatMsgBox(const Params&);
+	friend class LLUICtrlFactory;
+
+public:
+	void				setText(const LLStringExplicit &text);
+	void				addText(const LLStringExplicit &text);
+	
+	S32					getTextPixelHeight();
+	S32					getTextLinesNum();
+
+	/*virtual*/ void	setValue(const LLSD &value);
+	/*virtual*/ void	drawText(S32 x, S32 y, const LLWString &text, const LLColor4 &color);
+
+private:
+	S32					mBlockSpacing;
+	std::vector<S32>	mSeparatorOffset;
+};
+
+#endif
+