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31 * @Id: curs_mouse.3x,v 1.89 2024/02/17 21:43:03 tom Exp @
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43 <H1 class="no-header">curs_mouse 3x 2024-02-17 ncurses 6.4 Library calls</H1>
45 <STRONG><A HREF="curs_mouse.3x.html">curs_mouse(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_mouse.3x.html">curs_mouse(3x)</A></STRONG>
50 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
51 <STRONG>has_mouse</STRONG>, <STRONG>getmouse</STRONG>, <STRONG>ungetmouse</STRONG>, <STRONG>mousemask</STRONG>, <STRONG>wenclose</STRONG>, <STRONG>mouse_trafo</STRONG>,
52 <STRONG>wmouse_trafo</STRONG>, <STRONG>mouseinterval</STRONG> - get mouse events in <EM>curses</EM>
55 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
56 <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
58 <STRONG>typedef</STRONG> <STRONG>unsigned</STRONG> <STRONG>long</STRONG> <STRONG>mmask_t;</STRONG>
60 <STRONG>typedef</STRONG> <STRONG>struct</STRONG> <STRONG>{</STRONG>
61 <STRONG>short</STRONG> <STRONG>id;</STRONG> <EM>/*</EM> <EM>ID</EM> <EM>to</EM> <EM>distinguish</EM> <EM>multiple</EM> <EM>devices</EM> <EM>*/</EM>
62 <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>y,</STRONG> <STRONG>z;</STRONG> <EM>/*</EM> <EM>event</EM> <EM>coordinates</EM> <EM>*/</EM>
63 <STRONG>mmask_t</STRONG> <STRONG>bstate;</STRONG> <EM>/*</EM> <EM>button</EM> <EM>state</EM> <EM>bits</EM> <EM>*/</EM>
64 <STRONG>}</STRONG> <STRONG>MEVENT;</STRONG>
66 <STRONG>bool</STRONG> <STRONG>has_mouse(void);</STRONG>
68 <STRONG>int</STRONG> <STRONG>getmouse(MEVENT</STRONG> <STRONG>*</STRONG><EM>event</EM><STRONG>);</STRONG>
69 <STRONG>int</STRONG> <STRONG>ungetmouse(MEVENT</STRONG> <STRONG>*</STRONG><EM>event</EM><STRONG>);</STRONG>
71 <STRONG>mmask_t</STRONG> <STRONG>mousemask(mmask_t</STRONG> <EM>newmask</EM><STRONG>,</STRONG> <STRONG>mmask_t</STRONG> <STRONG>*</STRONG><EM>oldmask</EM><STRONG>);</STRONG>
73 <STRONG>bool</STRONG> <STRONG>wenclose(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>);</STRONG>
75 <STRONG>bool</STRONG> <STRONG>mouse_trafo(int*</STRONG> <EM>pY</EM><STRONG>,</STRONG> <STRONG>int*</STRONG> <EM>pX</EM><STRONG>,</STRONG> <STRONG>bool</STRONG> <EM>to</EM><STRONG>_</STRONG><EM>screen</EM><STRONG>);</STRONG>
76 <STRONG>bool</STRONG> <STRONG>wmouse_trafo(const</STRONG> <STRONG>WINDOW*</STRONG> <EM>win</EM><STRONG>,</STRONG>
77 <STRONG>int*</STRONG> <EM>pY</EM><STRONG>,</STRONG> <STRONG>int*</STRONG> <EM>pX</EM><STRONG>,</STRONG> <STRONG>bool</STRONG> <EM>to</EM><STRONG>_</STRONG><EM>screen</EM><STRONG>);</STRONG>
79 <STRONG>int</STRONG> <STRONG>mouseinterval(int</STRONG> <EM>erval</EM><STRONG>);</STRONG>
82 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
83 These functions provide an interface to mouse events from <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>.
84 Mouse events are represented by <STRONG>KEY_MOUSE</STRONG> pseudo-key values in the
85 <STRONG><A HREF="curs_getch.3x.html">wgetch(3x)</A></STRONG> input stream.
88 </PRE><H3><a name="h3-mousemask">mousemask</a></H3><PRE>
89 To make mouse events visible, use the <STRONG>mousemask</STRONG> function. This sets
90 the mouse events to be reported. By default, no mouse events are
93 <STRONG>o</STRONG> The function returns an updated copy of <EM>newmask</EM> to indicate which
94 of the specified mouse events can be reported.
96 If the screen has not been initialized, or if the terminal does not
97 support mouse-events, this function returns 0.
99 <STRONG>o</STRONG> If <EM>oldmask</EM> is non-<STRONG>NULL</STRONG>, this function fills the indicated location
100 with the previous value of the current screen's mouse event mask.
102 As a side effect, setting a zero mousemask may turn off the mouse
103 pointer; setting a nonzero mask may turn it on. Whether this happens
107 </PRE><H3><a name="h3-Mouse-Events">Mouse Events</a></H3><PRE>
108 Here are the mouse event type masks which may be defined:
110 <STRONG>Name</STRONG> <STRONG>Description</STRONG>
111 ------------------------------------------------------------------------
112 <STRONG>BUTTON1_PRESSED</STRONG> mouse button 1 down
113 <STRONG>BUTTON1_RELEASED</STRONG> mouse button 1 up
114 <STRONG>BUTTON1_CLICKED</STRONG> mouse button 1 clicked
116 <STRONG>BUTTON1_DOUBLE_CLICKED</STRONG> mouse button 1 double clicked
117 <STRONG>BUTTON1_TRIPLE_CLICKED</STRONG> mouse button 1 triple clicked
118 ------------------------------------------------------------------------
119 <STRONG>BUTTON2_PRESSED</STRONG> mouse button 2 down
120 <STRONG>BUTTON2_RELEASED</STRONG> mouse button 2 up
121 <STRONG>BUTTON2_CLICKED</STRONG> mouse button 2 clicked
122 <STRONG>BUTTON2_DOUBLE_CLICKED</STRONG> mouse button 2 double clicked
123 <STRONG>BUTTON2_TRIPLE_CLICKED</STRONG> mouse button 2 triple clicked
124 ------------------------------------------------------------------------
125 <STRONG>BUTTON3_PRESSED</STRONG> mouse button 3 down
126 <STRONG>BUTTON3_RELEASED</STRONG> mouse button 3 up
127 <STRONG>BUTTON3_CLICKED</STRONG> mouse button 3 clicked
128 <STRONG>BUTTON3_DOUBLE_CLICKED</STRONG> mouse button 3 double clicked
129 <STRONG>BUTTON3_TRIPLE_CLICKED</STRONG> mouse button 3 triple clicked
130 ------------------------------------------------------------------------
131 <STRONG>BUTTON4_PRESSED</STRONG> mouse button 4 down
132 <STRONG>BUTTON4_RELEASED</STRONG> mouse button 4 up
133 <STRONG>BUTTON4_CLICKED</STRONG> mouse button 4 clicked
134 <STRONG>BUTTON4_DOUBLE_CLICKED</STRONG> mouse button 4 double clicked
135 <STRONG>BUTTON4_TRIPLE_CLICKED</STRONG> mouse button 4 triple clicked
136 ------------------------------------------------------------------------
137 <STRONG>BUTTON5_PRESSED</STRONG> mouse button 5 down
138 <STRONG>BUTTON5_RELEASED</STRONG> mouse button 5 up
139 <STRONG>BUTTON5_CLICKED</STRONG> mouse button 5 clicked
140 <STRONG>BUTTON5_DOUBLE_CLICKED</STRONG> mouse button 5 double clicked
141 <STRONG>BUTTON5_TRIPLE_CLICKED</STRONG> mouse button 5 triple clicked
142 ------------------------------------------------------------------------
143 <STRONG>BUTTON_SHIFT</STRONG> shift was down during button state change
144 <STRONG>BUTTON_CTRL</STRONG> control was down during button state change
145 <STRONG>BUTTON_ALT</STRONG> alt was down during button state change
146 <STRONG>ALL_MOUSE_EVENTS</STRONG> report all button state changes
147 <STRONG>REPORT_MOUSE_POSITION</STRONG> report mouse movement
148 ------------------------------------------------------------------------
151 </PRE><H3><a name="h3-getmouse">getmouse</a></H3><PRE>
152 Once a class of mouse events has been made visible in a window, calling
153 the <STRONG>wgetch</STRONG> function on that window may return <STRONG>KEY_MOUSE</STRONG> as an indicator
154 that a mouse event has been queued. To read the event data and pop the
155 event off the queue, call <STRONG>getmouse</STRONG>. This function will return <STRONG>OK</STRONG> if a
156 mouse event is actually visible in the given window, <STRONG>ERR</STRONG> otherwise.
157 When <STRONG>getmouse</STRONG> returns <STRONG>OK</STRONG>, the data deposited as y and x in the event
158 structure coordinates will be screen-relative character-cell
159 coordinates. The returned state mask will have exactly one bit set to
160 indicate the event type. The corresponding data in the queue is marked
161 invalid. A subsequent call to <STRONG>getmouse</STRONG> will retrieve the next older
165 </PRE><H3><a name="h3-ungetmouse">ungetmouse</a></H3><PRE>
166 The <STRONG>ungetmouse</STRONG> function behaves analogously to <STRONG>ungetch</STRONG>. It pushes a
167 <STRONG>KEY_MOUSE</STRONG> event onto the input queue, and associates with that event
168 the given state data and screen-relative character-cell coordinates.
171 </PRE><H3><a name="h3-wenclose">wenclose</a></H3><PRE>
172 The <STRONG>wenclose</STRONG> function tests whether a given pair of screen-relative
173 character-cell coordinates is enclosed by a given window, returning
174 <STRONG>TRUE</STRONG> if it is and <STRONG>FALSE</STRONG> otherwise. It is useful for determining what
175 subset of the screen windows enclose the location of a mouse event.
177 If the parameter is a pad, <STRONG>wenclose</STRONG> uses the most recent screen
178 coordinates used for this pad in <STRONG><A HREF="curs_pad.3x.html">prefresh(3x)</A></STRONG> or <STRONG><A HREF="curs_pad.3x.html">pnoutrefresh(3x)</A></STRONG>.
181 </PRE><H3><a name="h3-wmouse_trafo">wmouse_trafo</a></H3><PRE>
182 The <STRONG>wmouse_trafo</STRONG> function transforms a given pair of coordinates from
183 <STRONG>stdscr</STRONG>-relative coordinates to coordinates relative to the given window
184 or vice versa. The resulting <STRONG>stdscr</STRONG>-relative coordinates are not
185 always identical to screen coordinates due to the mechanism to reserve
186 lines on top or bottom of the screen for other purposes (see the
187 <STRONG>ripoffline</STRONG> and <STRONG><A HREF="curs_slk.3x.html">slk_init(3x)</A></STRONG> calls, for example).
189 <STRONG>o</STRONG> If the parameter <EM>to</EM><STRONG>_</STRONG><EM>screen</EM> is <STRONG>TRUE</STRONG>, the pointers <EM>pY,</EM> <EM>pX</EM> must
190 reference the coordinates of a location inside the window <EM>win</EM>.
191 They are converted to <STRONG>stdscr</STRONG>-relative coordinates and returned
192 through the pointers. If the conversion was successful, the
193 function returns <STRONG>TRUE</STRONG>.
195 If one of the parameters was <STRONG>NULL</STRONG> or the location is not inside the
196 window, <STRONG>FALSE</STRONG> is returned.
198 <STRONG>o</STRONG> If <EM>to</EM><STRONG>_</STRONG><EM>screen</EM> is <STRONG>FALSE</STRONG>, the pointers <EM>pY,</EM> <EM>pX</EM> must reference
199 <STRONG>stdscr</STRONG>-relative coordinates. They are converted to window-relative
200 coordinates if the window <EM>win</EM> encloses this point. In this case
201 the function returns <STRONG>TRUE</STRONG>.
203 If one of the parameters is <STRONG>NULL</STRONG> or the point is not inside the
204 window, <STRONG>FALSE</STRONG> is returned.
206 The referenced coordinates are only replaced by the converted
207 coordinates if the transformation was successful.
210 </PRE><H3><a name="h3-mouse_trafo">mouse_trafo</a></H3><PRE>
211 The <STRONG>mouse_trafo</STRONG> function performs the same translation as <STRONG>wmouse_trafo</STRONG>,
212 using <STRONG>stdscr</STRONG> for <EM>win</EM>.
215 </PRE><H3><a name="h3-mouseinterval">mouseinterval</a></H3><PRE>
216 The <STRONG>mouseinterval</STRONG> function sets the maximum time (in thousands of a
217 second) that can elapse between press and release events for them to be
220 Calling <STRONG>mouseinterval(0)</STRONG> disables click resolution. When ncurses
221 detects a mouse event, it awaits further input activity up to this
222 interval, and then checks for a subsequent mouse event which can be
223 combined with the first event. If the timeout expires without input
224 activity (which would happen with a zero interval), then no click
225 resolution will occur.
227 This function returns the previous interval value. Use
228 <STRONG>mouseinterval(-1)</STRONG> to obtain the interval without altering it.
230 The mouse interval is set to one sixth of a second when the
231 corresponding screen is initialized, e.g., in <STRONG><A HREF="curs_initscr.3x.html">initscr(3x)</A></STRONG> or
232 <STRONG><A HREF="curs_terminfo.3x.html">setupterm(3x)</A></STRONG>.
235 </PRE><H3><a name="h3-has_mouse">has_mouse</a></H3><PRE>
236 The <STRONG>has_mouse</STRONG> function returns <STRONG>TRUE</STRONG> if the mouse driver has been
237 successfully initialized, and <STRONG>FALSE</STRONG> otherwise.
239 Mouse events are ignored when input is in cooked mode, and cause an
240 error beep when cooked mode is being simulated in a window by a
241 function such as <STRONG>getstr</STRONG> that expects a linefeed for input-loop
245 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
246 <STRONG>has_mouse</STRONG>, <STRONG>wenclose</STRONG>, <STRONG>mouse_trafo</STRONG>, and <STRONG>wmouse_trafo</STRONG> return <STRONG>TRUE</STRONG> or <STRONG>FALSE</STRONG>
249 <STRONG>getmouse</STRONG> and <STRONG>ungetmouse</STRONG> return <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> upon success.
251 <STRONG>getmouse</STRONG> fails if:
253 <STRONG>o</STRONG> no mouse driver was initialized,
255 <STRONG>o</STRONG> the mask of reportable events is zero,
257 <STRONG>o</STRONG> a mouse event was detected that does not match the mask,
259 <STRONG>o</STRONG> or if no more events remain in the queue.
261 <STRONG>ungetmouse</STRONG> returns an error if the event queue is full.
263 <STRONG>mousemask</STRONG> returns the mask of reportable events.
265 <STRONG>mouseinterval</STRONG> returns the previous interval value, unless the terminal
266 was not initialized. In that case, it returns the maximum interval
270 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
271 The order of the <STRONG>MEVENT</STRONG> structure members is not guaranteed.
272 Additional fields may be added to the structure in the future.
274 Under <EM>ncurses,</EM> these calls are implemented using either <EM>xterm</EM>'s built-
275 in mouse-tracking API or platform-specific drivers including
277 <STRONG>o</STRONG> Alessandro Rubini's gpm server
279 <STRONG>o</STRONG> FreeBSD sysmouse
281 <STRONG>o</STRONG> OS/2 EMX
283 If you are using an unsupported configuration, mouse events will not be
284 visible to <EM>ncurses</EM> (and the <STRONG>mousemask</STRONG> function will always return <STRONG>0</STRONG>).
286 If the <EM>terminfo</EM> entry contains a <STRONG>XM</STRONG> string, this is used in the <EM>xterm</EM>
287 mouse driver to control the way the terminal is initialized for mouse
288 operation. The default, if <STRONG>XM</STRONG> is not found, corresponds to private
289 mode 1000 of <EM>xterm:</EM>
291 \E[?1000%?%p1%{1}%=%th%el%;
293 The mouse driver also recognizes a newer <EM>xterm</EM> private mode 1006, e.g.,
295 \E[?1006;1000%?%p1%{1}%=%th%el%;
297 The <EM>z</EM> member in the event structure is not presently used. It is
298 intended for use with touch screens (which may be pressure-sensitive)
299 or with 3D-mice/trackballs/power gloves.
301 The <STRONG>ALL_MOUSE_EVENTS</STRONG> class does not include <STRONG>REPORT_MOUSE_POSITION</STRONG>.
302 They are distinct. For example, in <EM>xterm,</EM> wheel/scrolling mice send
303 position reports as a sequence of presses of buttons 4 or 5 without
304 matching button-releases.
307 </PRE><H2><a name="h2-EXTENSIONS">EXTENSIONS</a></H2><PRE>
308 These functions were designed for <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>, and are not found in
309 SVr4 <EM>curses</EM>, 4.4BSD <EM>curses</EM>, or any other previous curses
310 implementation. (SVr4 <EM>curses</EM> did have a <EM>getmouse</EM> function, which took
311 no argument and returned a different type.)
314 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
315 Applications employing the <EM>ncurses</EM> mouse extension should condition its
316 use on the visibility of the <STRONG>NCURSES_MOUSE_VERSION</STRONG> preprocessor macro.
317 When the interface changes, the macro's value increments. Multiple
318 versions are available when <EM>ncurses</EM> is configured; see section
319 "ALTERNATE CONFIGURATIONS" of <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>. The following values may be
322 1 has definitions for reserved events. The mask uses 28 bits.
324 2 adds definitions for button 5, removes the definitions for
325 reserved events. The mask uses 29 bits.
327 SVr4 <EM>curses</EM> had support for the mouse in a variant of <STRONG>xterm(1)</STRONG>. It is
328 mentioned in a few places, with little supporting documentation.
330 <STRONG>o</STRONG> Its "libcurses" manual page lists functions for this feature
331 prototyped in <EM>curses.h</EM>.
333 extern int mouse_set(long int);
334 extern int mouse_on(long int);
335 extern int mouse_off(long int);
336 extern int request_mouse_pos(void);
337 extern int map_button(unsigned long);
338 extern void wmouse_position(WINDOW *, int *, int *);
339 extern unsigned long getmouse(void), getbmap(void);
341 <STRONG>o</STRONG> Its "terminfo" manual page lists capabilities for the feature.
343 <STRONG>buttons</STRONG> <STRONG>btns</STRONG> <STRONG>BT</STRONG> Number of buttons on the mouse
344 <STRONG>get_mouse</STRONG> <STRONG>getm</STRONG> <STRONG>Gm</STRONG> Curses should get button events
345 <STRONG>key_mouse</STRONG> <STRONG>kmous</STRONG> <STRONG>Km</STRONG> 0631, Mouse event has occurred
346 <STRONG>mouse_info</STRONG> <STRONG>minfo</STRONG> <STRONG>Mi</STRONG> Mouse status information
347 <STRONG>req_mouse_pos</STRONG> <STRONG>reqmp</STRONG> <STRONG>RQ</STRONG> Request mouse position report
349 <STRONG>o</STRONG> The interface made assumptions (as does <EM>ncurses</EM>) about the escape
350 sequences sent to and received from the terminal.
352 For instance, the SVr4 <EM>curses</EM> library used the <STRONG>get_mouse</STRONG> capability
353 to tell the terminal which mouse button events it should send,
354 passing the mouse-button bit mask to the terminal. Also, it could
355 ask the terminal where the mouse was using the <STRONG>req_mouse_pos</STRONG>
358 Those features required a terminal program that had been modified
359 to work with SVr4 <EM>curses.</EM> They were not part of the X Consortium's
362 When developing the <EM>xterm</EM> mouse support for <EM>ncurses</EM> in September 1995,
363 Eric Raymond was uninterested in using the same interface due to its
364 lack of documentation. Later, in 1998, Mark Hesseling provided support
365 in <EM>PDCurses</EM> 2.3 using the SVr4 interface. <EM>PDCurses,</EM> however, does not
366 use video terminals, making it unnecessary to be concerned about
367 compatibility with the escape sequences.
370 </PRE><H2><a name="h2-BUGS">BUGS</a></H2><PRE>
371 Mouse events from <EM>xterm</EM> are <EM>not</EM> ignored in cooked mode if they have
372 been enabled by <STRONG>mousemask</STRONG>. Instead, the <EM>xterm</EM> mouse report sequence
373 appears in the string read.
375 Mouse event reports from <EM>xterm</EM> are not detected correctly in a window
376 with keypad application mode disabled, since they are interpreted as a
377 variety of function key. Set the terminal's <EM>terminfo</EM> capability <STRONG>kmous</STRONG>
378 to "\E[M" (the beginning of the response from <EM>xterm</EM> for mouse clicks).
379 Other values of <STRONG>kmous</STRONG> are permitted under the same assumption, that is,
380 the report begins with that sequence.
382 Because there are no standard response sequences that serve to identify
383 terminals supporting the <EM>xterm</EM> mouse protocol, <EM>ncurses</EM> assumes that if
384 <STRONG>kmous</STRONG> is defined in the terminal description, or if the terminal type's
385 primary name or aliases contain the string "xterm", then the terminal
386 may send mouse events. The <STRONG>kmous</STRONG> capability is checked first, allowing
387 use of newer <EM>xterm</EM> mouse protocols, such as its private mode 1006.
390 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
391 <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_inopts.3x.html">curs_inopts(3x)</A></STRONG>, <STRONG><A HREF="curs_kernel.3x.html">curs_kernel(3x)</A></STRONG>, <STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG>,
392 <STRONG><A HREF="curs_slk.3x.html">curs_slk(3x)</A></STRONG>, <STRONG><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>
396 ncurses 6.4 2024-02-17 <STRONG><A HREF="curs_mouse.3x.html">curs_mouse(3x)</A></STRONG>
400 <li><a href="#h2-NAME">NAME</a></li>
401 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
402 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
404 <li><a href="#h3-mousemask">mousemask</a></li>
405 <li><a href="#h3-Mouse-Events">Mouse Events</a></li>
406 <li><a href="#h3-getmouse">getmouse</a></li>
407 <li><a href="#h3-ungetmouse">ungetmouse</a></li>
408 <li><a href="#h3-wenclose">wenclose</a></li>
409 <li><a href="#h3-wmouse_trafo">wmouse_trafo</a></li>
410 <li><a href="#h3-mouse_trafo">mouse_trafo</a></li>
411 <li><a href="#h3-mouseinterval">mouseinterval</a></li>
412 <li><a href="#h3-has_mouse">has_mouse</a></li>
415 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
416 <li><a href="#h2-NOTES">NOTES</a></li>
417 <li><a href="#h2-EXTENSIONS">EXTENSIONS</a></li>
418 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
419 <li><a href="#h2-BUGS">BUGS</a></li>
420 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>