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diff --git a/src/xterm_mouse.hh b/src/xterm_mouse.hh
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+/**
+ * Copyright (c) 2007-2012, Timothy Stack
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of Timothy Stack nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @file xterm_mouse.hh
+ */
+
+#ifndef xterm_mouse_hh
+#define xterm_mouse_hh
+
+#include "config.h"
+
+#if defined HAVE_NCURSESW_CURSES_H
+#    include <ncursesw/curses.h>
+#elif defined HAVE_NCURSESW_H
+#    include <ncursesw.h>
+#elif defined HAVE_NCURSES_CURSES_H
+#    include <ncurses/curses.h>
+#elif defined HAVE_NCURSES_H
+#    include <ncurses.h>
+#elif defined HAVE_CURSES_H
+#    include <curses.h>
+#else
+#    error "SysV or X/Open-compatible Curses header file required"
+#endif
+
+/**
+ * Base class for delegates of the xterm_mouse class.
+ */
+class mouse_behavior {
+public:
+    virtual ~mouse_behavior() = default;
+
+    /**
+     * Callback used to process mouse events.
+     *
+     * @param button The button that was pressed or released.  This will
+     *   be one of the XT_BUTTON or XT_SCROLL constants in the xterm_mouse
+     *   class.
+     * @param x      The X coordinate where the event occurred.
+     * @param y      The Y coordinate where the event occurred.
+     */
+    virtual void mouse_event(int button, bool release, int x, int y) = 0;
+};
+
+/**
+ * Class that handles xterm mouse events coming through the ncurses interface.
+ */
+class xterm_mouse {
+public:
+    static const int XT_BUTTON1 = 0;
+    static const int XT_BUTTON2 = 1;
+    static const int XT_BUTTON3 = 2;
+
+    static const int XT_DRAG_FLAG = 32;
+    static const int XT_SCROLL_WHEEL_FLAG = 64;
+    static const int XT_SCROLL_UP = XT_SCROLL_WHEEL_FLAG | XT_BUTTON1;
+    static const int XT_SCROLL_DOWN = XT_SCROLL_WHEEL_FLAG | XT_BUTTON2;
+
+    static const int XT_BUTTON__MASK
+        = XT_SCROLL_WHEEL_FLAG | XT_BUTTON1 | XT_BUTTON2 | XT_BUTTON3;
+
+    static const char* XT_TERMCAP;
+    static const char* XT_TERMCAP_TRACKING;
+    static const char* XT_TERMCAP_SGR;
+
+    /**
+     * @return True if the user's terminal supports xterm-mouse events.
+     */
+    static bool is_available();
+
+    ~xterm_mouse()
+    {
+        if (this->is_enabled()) {
+            set_enabled(false);
+        }
+    }
+
+    /**
+     * @param enabled True if xterm mouse support should be enabled in the
+     *   terminal.
+     */
+    void set_enabled(bool enabled);
+
+    /**
+     * @return True if xterm mouse support is enabled, false otherwise.
+     */
+    bool is_enabled() const { return this->xm_enabled; }
+
+    /**
+     * @param mb The delegate to send mouse events to.
+     */
+    void set_behavior(mouse_behavior* mb) { this->xm_behavior = mb; }
+
+    mouse_behavior* get_behavior() { return this->xm_behavior; }
+
+    /**
+     * Handle a KEY_MOUSE character from ncurses.
+     * @param ch unused
+     */
+    void handle_mouse();
+
+private:
+    bool xm_enabled{false};
+    mouse_behavior* xm_behavior{nullptr};
+};
+#endif