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diff --git a/indra/newview/llexternaleditor.h b/indra/newview/llexternaleditor.h
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+/** 
+ * @file llexternaleditor.h
+ * @brief A convenient class to run external editor.
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLEXTERNALEDITOR_H
+#define LL_LLEXTERNALEDITOR_H
+
+#include <llprocesslauncher.h>
+
+/**
+ * Usage:
+ *  LLExternalEditor ed;
+ *  ed.setCommand("MY_EXTERNAL_EDITOR_VAR");
+ *  ed.run("/path/to/file1");
+ *  ed.run("/other/path/to/file2");
+ */
+class LLExternalEditor
+{
+	typedef std::vector<std::string> string_vec_t;
+
+public:
+
+	/**
+	 * Set editor command.
+	 *
+	 * @param env_var			Environment variable of the same purpose.
+	 * @param override			Optional override.
+	 *
+	 * First tries the override, then a predefined setting (sSetting),
+	 * then the environment variable.
+	 *
+	 * @return Command if found, empty string otherwise.
+	 *
+	 * @see sSetting
+	 */
+	bool setCommand(const std::string& env_var, const std::string& override = LLStringUtil::null);
+
+	/**
+	 * Run the editor with the given file.
+	 *
+	 * @param file_path File to edit.
+	 * @return true on success, false on error.
+	 */
+	bool run(const std::string& file_path);
+
+private:
+
+	static std::string findCommand(
+		const std::string& env_var,
+		const std::string& override);
+
+	static size_t tokenize(string_vec_t& tokens, const std::string& str);
+
+	/**
+	 * Filename placeholder that gets replaced with an actual file name.
+	 */
+	static const std::string sFilenameMarker;
+
+	/**
+	 * Setting that can specify the editor command.
+	 */
+	static const std::string sSetting;
+
+
+	std::string			mArgs;
+	LLProcessLauncher	mProcess;
+};
+
+#endif // LL_LLEXTERNALEDITOR_H