Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcurses/base/resizeterm.c	Lines:	0	122	0.0 %
Date:	2016-12-06	Branches:	0	114	0.0 %


/* $OpenBSD: resizeterm.c,v 1.3 2010/01/12 23:22:06 nicm Exp $ */

/****************************************************************************
 * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc.              *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/****************************************************************************
 *  Author: Thomas E. Dickey                                                *
 ****************************************************************************/

/*
 * This is an extension to the curses library.  It provides callers with a hook
 * into the NCURSES data to resize windows, primarily for use by programs
 * running in an X Window terminal (e.g., xterm).  I abstracted this module
 * from my application library for NCURSES because it must be compiled with
 * the private data structures -- T.Dickey 1995/7/4.
 */

#include <curses.priv.h>
#include <term.h>

MODULE_ID("$Id: resizeterm.c,v 1.3 2010/01/12 23:22:06 nicm Exp $")

#define stolen_lines (screen_lines - SP->_lines_avail)

/*
 * If we're trying to be reentrant, do not want any local statics.
 */
#if USE_REENTRANT
#define EXTRA_ARGS ,     CurLines,     CurCols
#define EXTRA_DCLS , int CurLines, int CurCols
#else
static int current_lines;
static int current_cols;
#define CurLines current_lines
#define CurCols  current_cols
#define EXTRA_ARGS		/* nothing */
#define EXTRA_DCLS		/* nothing */
#endif

#ifdef TRACE
static void
show_window_sizes(const char *name)
{
    WINDOWLIST *wp;

    _nc_lock_global(curses);
    _tracef("%s resizing: %2d x %2d (%2d x %2d)", name, LINES, COLS,
	    screen_lines, screen_columns);
    for (each_window(wp)) {
	_tracef("  window %p is %2ld x %2ld at %2ld,%2ld",
		&(wp->win),
		(long) wp->win._maxy + 1,
		(long) wp->win._maxx + 1,
		(long) wp->win._begy,
		(long) wp->win._begx);
    }
    _nc_unlock_global(curses);
}
#endif

/*
 * Return true if the given dimensions do not match the internal terminal
 * structure's size.
 */
NCURSES_EXPORT(bool)
is_term_resized(int ToLines, int ToCols)
{
    T((T_CALLED("is_term_resized(%d, %d)"), ToLines, ToCols));
    returnCode(ToLines > 0
	       && ToCols > 0
	       && (ToLines != screen_lines
		   || ToCols != screen_columns));
}

/*
 */
static ripoff_t *
ripped_window(WINDOW *win)
{
    ripoff_t *result = 0;
    ripoff_t *rop;

    if (win != 0) {
	for (each_ripoff(rop)) {
	    if (rop->win == win && rop->line != 0) {
		result = rop;
		break;
	    }
	}
    }
    return result;
}

/*
 * Returns the number of lines from the bottom for the beginning of a ripped
 * off window.
 */
static int
ripped_bottom(WINDOW *win)
{
    int result = 0;
    ripoff_t *rop;

    if (win != 0) {
	for (each_ripoff(rop)) {
	    if (rop->line < 0) {
		result -= rop->line;
		if (rop->win == win) {
		    break;
		}
	    }
	}
    }
    return result;
}

/*
 * Return the number of levels of child-windows under the current window.
 */
static int
child_depth(WINDOW *cmp)
{
    int depth = 0;

    if (cmp != 0) {
	WINDOWLIST *wp;

	for (each_window(wp)) {
	    WINDOW *tst = &(wp->win);
	    if (tst->_parent == cmp) {
		depth = 1 + child_depth(tst);
		break;
	    }
	}
    }
    return depth;
}

/*
 * Return the number of levels of parent-windows above the current window.
 */
static int
parent_depth(WINDOW *cmp)
{
    int depth = 0;

    if (cmp != 0) {
	WINDOW *tst;
	while ((tst = cmp->_parent) != 0) {
	    ++depth;
	    cmp = tst;
	}
    }
    return depth;
}

/*
 * FIXME: must adjust position so it's within the parent!
 */
static int
adjust_window(WINDOW *win, int ToLines, int ToCols, int stolen EXTRA_DCLS)
{
    int result;
    int bottom = CurLines + SP->_topstolen - stolen;
    int myLines = win->_maxy + 1;
    int myCols = win->_maxx + 1;
    ripoff_t *rop = ripped_window(win);

    T((T_CALLED("adjust_window(%p,%d,%d)%s depth %d/%d currently %ldx%ld at %ld,%ld"),
       win, ToLines, ToCols,
       (rop != 0) ? " (rip)" : "",
       parent_depth(win),
       child_depth(win),
       (long) getmaxy(win), (long) getmaxx(win),
       (long) getbegy(win) + win->_yoffset, (long) getbegx(win)));

    if (rop != 0 && rop->line < 0) {
	/*
	 * If it is a ripped-off window at the bottom of the screen, simply
	 * move it to the same relative position.
	 */
	win->_begy = ToLines - ripped_bottom(win) - 0 - win->_yoffset;
    } else if (win->_begy >= bottom) {
	/*
	 * If it is below the bottom of the new screen, move up by the same
	 * amount that the screen shrank.
	 */
	win->_begy += (ToLines - CurLines);
    } else {
	if (myLines == (CurLines - stolen)
	    && ToLines != CurLines) {
	    myLines = ToLines - stolen;
	} else if (myLines == CurLines
		   && ToLines != CurLines) {
	    myLines = ToLines;
	}
    }

    if (myLines > ToLines) {
	myLines = ToLines;
    }

    if (myCols > ToCols)
	myCols = ToCols;

    if (myCols == CurCols
	&& ToCols != CurCols)
	myCols = ToCols;

    result = wresize(win, myLines, myCols);
    returnCode(result);
}

/*
 * If we're decreasing size, recursively search for windows that have no
 * children, decrease those to fit, then decrease the containing window, etc.
 */
static int
decrease_size(int ToLines, int ToCols, int stolen EXTRA_DCLS)
{
    bool found;
    int depth = 0;
    WINDOWLIST *wp;

    T((T_CALLED("decrease_size(%d, %d)"), ToLines, ToCols));

    do {
	found = FALSE;
	TR(TRACE_UPDATE, ("decreasing size of windows to %dx%d, depth=%d",
			  ToLines, ToCols, depth));
	for (each_window(wp)) {
	    WINDOW *win = &(wp->win);

	    if (!(win->_flags & _ISPAD)) {
		if (child_depth(win) == depth) {
		    found = TRUE;
		    if (adjust_window(win, ToLines, ToCols,
				      stolen EXTRA_ARGS) != OK)
			returnCode(ERR);
		}
	    }
	}
	++depth;
    } while (found);
    returnCode(OK);
}

/*
 * If we're increasing size, recursively search for windows that have no
 * parent, increase those to fit, then increase the contained window, etc.
 */
static int
increase_size(int ToLines, int ToCols, int stolen EXTRA_DCLS)
{
    bool found;
    int depth = 0;
    WINDOWLIST *wp;

    T((T_CALLED("increase_size(%d, %d)"), ToLines, ToCols));

    do {
	found = FALSE;
	TR(TRACE_UPDATE, ("increasing size of windows to %dx%d, depth=%d",
			  ToLines, ToCols, depth));
	for (each_window(wp)) {
	    WINDOW *win = &(wp->win);

	    if (!(win->_flags & _ISPAD)) {
		if (parent_depth(win) == depth) {
		    found = TRUE;
		    if (adjust_window(win, ToLines, ToCols,
				      stolen EXTRA_ARGS) != OK)
			returnCode(ERR);
		}
	    }
	}
	++depth;
    } while (found);
    returnCode(OK);
}

/*
 * This function reallocates NCURSES window structures, with no side-effects
 * such as ungetch().
 */
NCURSES_EXPORT(int)
resize_term(int ToLines, int ToCols)
{
    int result = OK EXTRA_ARGS;
    int was_stolen;

    T((T_CALLED("resize_term(%d,%d) old(%d,%d)"),
       ToLines, ToCols,
       screen_lines, screen_columns));

    if (SP == 0) {
	returnCode(ERR);
    }

    _nc_lock_global(curses);

    was_stolen = (screen_lines - SP->_lines_avail);
    if (is_term_resized(ToLines, ToCols)) {
	int myLines = CurLines = screen_lines;
	int myCols = CurCols = screen_columns;

#ifdef TRACE
	if (USE_TRACEF(TRACE_UPDATE)) {
	    show_window_sizes("before");
	    _nc_unlock_global(tracef);
	}
#endif
	if (ToLines > screen_lines) {
	    increase_size(myLines = ToLines, myCols, was_stolen EXTRA_ARGS);
	    CurLines = myLines;
	    CurCols = myCols;
	}

	if (ToCols > screen_columns) {
	    increase_size(myLines, myCols = ToCols, was_stolen EXTRA_ARGS);
	    CurLines = myLines;
	    CurCols = myCols;
	}

	if (ToLines < myLines ||
	    ToCols < myCols) {
	    decrease_size(ToLines, ToCols, was_stolen EXTRA_ARGS);
	}

	screen_lines = lines = ToLines;
	screen_columns = columns = ToCols;

	SP->_lines_avail = lines - was_stolen;

	if (SP->oldhash) {
	    FreeAndNull(SP->oldhash);
	}
	if (SP->newhash) {
	    FreeAndNull(SP->newhash);
	}
#ifdef TRACE
	if (USE_TRACEF(TRACE_UPDATE)) {
	    SET_LINES(ToLines - was_stolen);
	    SET_COLS(ToCols);
	    show_window_sizes("after");
	    _nc_unlock_global(tracef);
	}
#endif
    }

    /*
     * Always update LINES, to allow for call from lib_doupdate.c which
     * needs to have the count adjusted by the stolen (ripped off) lines.
     */
    SET_LINES(ToLines - was_stolen);
    SET_COLS(ToCols);

    _nc_unlock_global(curses);

    returnCode(result);
}

/*
 * This function reallocates NCURSES window structures.  It is invoked in
 * response to a SIGWINCH interrupt.  Other user-defined windows may also need
 * to be reallocated.
 *
 * Because this performs memory allocation, it should not (in general) be
 * invoked directly from the signal handler.
 */
NCURSES_EXPORT(int)
resizeterm(int ToLines, int ToCols)
{
    int result = ERR;

    T((T_CALLED("resizeterm(%d,%d) old(%d,%d)"),
       ToLines, ToCols,
       screen_lines, screen_columns));

    if (SP != 0) {
	result = OK;
	SP->_sig_winch = FALSE;

	if (is_term_resized(ToLines, ToCols)) {
#if USE_SIGWINCH
	    ripoff_t *rop;
	    bool slk_visible = (SP != 0
				&& SP->_slk != 0
				&& !(SP->_slk->hidden));

	    if (slk_visible) {
		slk_clear();
	    }
#endif
	    result = resize_term(ToLines, ToCols);

#if USE_SIGWINCH
	    _nc_ungetch(SP, KEY_RESIZE);	/* so application can know this */
	    clearok(curscr, TRUE);	/* screen contents are unknown */

	    /* ripped-off lines are a special case: if we did not lengthen
	     * them, we haven't moved them either.  repaint them, too.
	     *
	     * for the rest - stdscr and other windows - the client has to
	     * decide which to repaint, since without panels, ncurses does
	     * not know which are really on top.
	     */
	    for (each_ripoff(rop)) {
		if (rop->win != stdscr
		    && rop->win != 0
		    && rop->line < 0) {

		    if (rop->hook != _nc_slk_initialize) {
			touchwin(rop->win);
			wnoutrefresh(rop->win);
		    }
		}
	    }

	    /* soft-keys are a special case: we _know_ how to repaint them */
	    if (slk_visible) {
		slk_restore();
		slk_touch();

		slk_refresh();
	    }
#endif
	}
    }

    returnCode(result);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: resizeterm.c,v 1.3 2010/01/12 23:22:06 nicm Exp $ */
2
3			/****************************************************************************
4			* Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. *
5			* *
6			* Permission is hereby granted, free of charge, to any person obtaining a *
7			* copy of this software and associated documentation files (the *
8			* "Software"), to deal in the Software without restriction, including *
9			* without limitation the rights to use, copy, modify, merge, publish, *
10			* distribute, distribute with modifications, sublicense, and/or sell *
11			* copies of the Software, and to permit persons to whom the Software is *
12			* furnished to do so, subject to the following conditions: *
13			* *
14			* The above copyright notice and this permission notice shall be included *
15			* in all copies or substantial portions of the Software. *
16			* *
17			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
18			* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
19			* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
20			* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
21			* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
22			* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
23			* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
24			* *
25			* Except as contained in this notice, the name(s) of the above copyright *
26			* holders shall not be used in advertising or otherwise to promote the *
27			* sale, use or other dealings in this Software without prior written *
28			* authorization. *
29			****************************************************************************/
30
31			/****************************************************************************
32			* Author: Thomas E. Dickey *
33			****************************************************************************/
34
35			/*
36			* This is an extension to the curses library. It provides callers with a hook
37			* into the NCURSES data to resize windows, primarily for use by programs
38			* running in an X Window terminal (e.g., xterm). I abstracted this module
39			* from my application library for NCURSES because it must be compiled with
40			* the private data structures -- T.Dickey 1995/7/4.
41			*/
42
43			#include <curses.priv.h>
44			#include <term.h>
45
46			MODULE_ID("$Id: resizeterm.c,v 1.3 2010/01/12 23:22:06 nicm Exp $")
47
48			#define stolen_lines (screen_lines - SP->_lines_avail)
49
50			/*
51			* If we're trying to be reentrant, do not want any local statics.
52			*/
53			#if USE_REENTRANT
54			#define EXTRA_ARGS , CurLines, CurCols
55			#define EXTRA_DCLS , int CurLines, int CurCols
56			#else
57			static int current_lines;
58			static int current_cols;
59			#define CurLines current_lines
60			#define CurCols current_cols
61			#define EXTRA_ARGS /* nothing */
62			#define EXTRA_DCLS /* nothing */
63			#endif
64
65			#ifdef TRACE
66			static void
67			show_window_sizes(const char *name)
68			{
69			WINDOWLIST *wp;
70
71			_nc_lock_global(curses);
72			_tracef("%s resizing: %2d x %2d (%2d x %2d)", name, LINES, COLS,
73			screen_lines, screen_columns);
74			for (each_window(wp)) {
75			_tracef(" window %p is %2ld x %2ld at %2ld,%2ld",
76			&(wp->win),
77			(long) wp->win._maxy + 1,
78			(long) wp->win._maxx + 1,
79			(long) wp->win._begy,
80			(long) wp->win._begx);
81			}
82			_nc_unlock_global(curses);
83			}
84			#endif
85
86			/*
87			* Return true if the given dimensions do not match the internal terminal
88			* structure's size.
89			*/
90			NCURSES_EXPORT(bool)
91			is_term_resized(int ToLines, int ToCols)
92			{
93			T((T_CALLED("is_term_resized(%d, %d)"), ToLines, ToCols));
94			returnCode(ToLines > 0
95			&& ToCols > 0
96			&& (ToLines != screen_lines
97			\|\| ToCols != screen_columns));
98			}
99
100			/*
101			*/
102			static ripoff_t *
103			ripped_window(WINDOW *win)
104			{
105			ripoff_t *result = 0;
106			ripoff_t *rop;
107
108			if (win != 0) {
109			for (each_ripoff(rop)) {
110			if (rop->win == win && rop->line != 0) {
111			result = rop;
112			break;
113			}
114			}
115			}
116			return result;
117			}
118
119			/*
120			* Returns the number of lines from the bottom for the beginning of a ripped
121			* off window.
122			*/
123			static int
124			ripped_bottom(WINDOW *win)
125			{
126			int result = 0;
127			ripoff_t *rop;
128
129			if (win != 0) {
130			for (each_ripoff(rop)) {
131			if (rop->line < 0) {
132			result -= rop->line;
133			if (rop->win == win) {
134			break;
135			}
136			}
137			}
138			}
139			return result;
140			}
141
142			/*
143			* Return the number of levels of child-windows under the current window.
144			*/
145			static int
146			child_depth(WINDOW *cmp)
147			{
148			int depth = 0;
149
150			if (cmp != 0) {
151			WINDOWLIST *wp;
152
153			for (each_window(wp)) {
154			WINDOW *tst = &(wp->win);
155			if (tst->_parent == cmp) {
156			depth = 1 + child_depth(tst);
157			break;
158			}
159			}
160			}
161			return depth;
162			}
163
164			/*
165			* Return the number of levels of parent-windows above the current window.
166			*/
167			static int
168			parent_depth(WINDOW *cmp)
169			{
170			int depth = 0;
171
172			if (cmp != 0) {
173			WINDOW *tst;
174			while ((tst = cmp->_parent) != 0) {
175			++depth;
176			cmp = tst;
177			}
178			}
179			return depth;
180			}
181
182			/*
183			* FIXME: must adjust position so it's within the parent!
184			*/
185			static int
186			adjust_window(WINDOW *win, int ToLines, int ToCols, int stolen EXTRA_DCLS)
187			{
188			int result;
189			int bottom = CurLines + SP->_topstolen - stolen;
190			int myLines = win->_maxy + 1;
191			int myCols = win->_maxx + 1;
192			ripoff_t *rop = ripped_window(win);
193
194			T((T_CALLED("adjust_window(%p,%d,%d)%s depth %d/%d currently %ldx%ld at %ld,%ld"),
195			win, ToLines, ToCols,
196			(rop != 0) ? " (rip)" : "",
197			parent_depth(win),
198			child_depth(win),
199			(long) getmaxy(win), (long) getmaxx(win),
200			(long) getbegy(win) + win->_yoffset, (long) getbegx(win)));
201
202			if (rop != 0 && rop->line < 0) {
203			/*
204			* If it is a ripped-off window at the bottom of the screen, simply
205			* move it to the same relative position.
206			*/
207			win->_begy = ToLines - ripped_bottom(win) - 0 - win->_yoffset;
208			} else if (win->_begy >= bottom) {
209			/*
210			* If it is below the bottom of the new screen, move up by the same
211			* amount that the screen shrank.
212			*/
213			win->_begy += (ToLines - CurLines);
214			} else {
215			if (myLines == (CurLines - stolen)
216			&& ToLines != CurLines) {
217			myLines = ToLines - stolen;
218			} else if (myLines == CurLines
219			&& ToLines != CurLines) {
220			myLines = ToLines;
221			}
222			}
223
224			if (myLines > ToLines) {
225			myLines = ToLines;
226			}
227
228			if (myCols > ToCols)
229			myCols = ToCols;
230
231			if (myCols == CurCols
232			&& ToCols != CurCols)
233			myCols = ToCols;
234
235			result = wresize(win, myLines, myCols);
236			returnCode(result);
237			}
238
239			/*
240			* If we're decreasing size, recursively search for windows that have no
241			* children, decrease those to fit, then decrease the containing window, etc.
242			*/
243			static int
244			decrease_size(int ToLines, int ToCols, int stolen EXTRA_DCLS)
245			{
246			bool found;
247			int depth = 0;
248			WINDOWLIST *wp;
249
250			T((T_CALLED("decrease_size(%d, %d)"), ToLines, ToCols));
251
252			do {
253			found = FALSE;
254			TR(TRACE_UPDATE, ("decreasing size of windows to %dx%d, depth=%d",
255			ToLines, ToCols, depth));
256			for (each_window(wp)) {
257			WINDOW *win = &(wp->win);
258
259			if (!(win->_flags & _ISPAD)) {
260			if (child_depth(win) == depth) {
261			found = TRUE;
262			if (adjust_window(win, ToLines, ToCols,
263			stolen EXTRA_ARGS) != OK)
264			returnCode(ERR);
265			}
266			}
267			}
268			++depth;
269			} while (found);
270			returnCode(OK);
271			}
272
273			/*
274			* If we're increasing size, recursively search for windows that have no
275			* parent, increase those to fit, then increase the contained window, etc.
276			*/
277			static int
278			increase_size(int ToLines, int ToCols, int stolen EXTRA_DCLS)
279			{
280			bool found;
281			int depth = 0;
282			WINDOWLIST *wp;
283
284			T((T_CALLED("increase_size(%d, %d)"), ToLines, ToCols));
285
286			do {
287			found = FALSE;
288			TR(TRACE_UPDATE, ("increasing size of windows to %dx%d, depth=%d",
289			ToLines, ToCols, depth));
290			for (each_window(wp)) {
291			WINDOW *win = &(wp->win);
292
293			if (!(win->_flags & _ISPAD)) {
294			if (parent_depth(win) == depth) {
295			found = TRUE;
296			if (adjust_window(win, ToLines, ToCols,
297			stolen EXTRA_ARGS) != OK)
298			returnCode(ERR);
299			}
300			}
301			}
302			++depth;
303			} while (found);
304			returnCode(OK);
305			}
306
307			/*
308			* This function reallocates NCURSES window structures, with no side-effects
309			* such as ungetch().
310			*/
311			NCURSES_EXPORT(int)
312			resize_term(int ToLines, int ToCols)
313			{
314			int result = OK EXTRA_ARGS;
315			int was_stolen;
316
317			T((T_CALLED("resize_term(%d,%d) old(%d,%d)"),
318			ToLines, ToCols,
319			screen_lines, screen_columns));
320
321			if (SP == 0) {
322			returnCode(ERR);
323			}
324
325			_nc_lock_global(curses);
326
327			was_stolen = (screen_lines - SP->_lines_avail);
328			if (is_term_resized(ToLines, ToCols)) {
329			int myLines = CurLines = screen_lines;
330			int myCols = CurCols = screen_columns;
331
332			#ifdef TRACE
333			if (USE_TRACEF(TRACE_UPDATE)) {
334			show_window_sizes("before");
335			_nc_unlock_global(tracef);
336			}
337			#endif
338			if (ToLines > screen_lines) {
339			increase_size(myLines = ToLines, myCols, was_stolen EXTRA_ARGS);
340			CurLines = myLines;
341			CurCols = myCols;
342			}
343
344			if (ToCols > screen_columns) {
345			increase_size(myLines, myCols = ToCols, was_stolen EXTRA_ARGS);
346			CurLines = myLines;
347			CurCols = myCols;
348			}
349
350			if (ToLines < myLines \|\|
351			ToCols < myCols) {
352			decrease_size(ToLines, ToCols, was_stolen EXTRA_ARGS);
353			}
354
355			screen_lines = lines = ToLines;
356			screen_columns = columns = ToCols;
357
358			SP->_lines_avail = lines - was_stolen;
359
360			if (SP->oldhash) {
361			FreeAndNull(SP->oldhash);
362			}
363			if (SP->newhash) {
364			FreeAndNull(SP->newhash);
365			}
366			#ifdef TRACE
367			if (USE_TRACEF(TRACE_UPDATE)) {
368			SET_LINES(ToLines - was_stolen);
369			SET_COLS(ToCols);
370			show_window_sizes("after");
371			_nc_unlock_global(tracef);
372			}
373			#endif
374			}
375
376			/*
377			* Always update LINES, to allow for call from lib_doupdate.c which
378			* needs to have the count adjusted by the stolen (ripped off) lines.
379			*/
380			SET_LINES(ToLines - was_stolen);
381			SET_COLS(ToCols);
382
383			_nc_unlock_global(curses);
384
385			returnCode(result);
386			}
387
388			/*
389			* This function reallocates NCURSES window structures. It is invoked in
390			* response to a SIGWINCH interrupt. Other user-defined windows may also need
391			* to be reallocated.
392			*
393			* Because this performs memory allocation, it should not (in general) be
394			* invoked directly from the signal handler.
395			*/
396			NCURSES_EXPORT(int)
397			resizeterm(int ToLines, int ToCols)
398			{
399			int result = ERR;
400
401			T((T_CALLED("resizeterm(%d,%d) old(%d,%d)"),
402			ToLines, ToCols,
403			screen_lines, screen_columns));
404
405			if (SP != 0) {
406			result = OK;
407			SP->_sig_winch = FALSE;
408
409			if (is_term_resized(ToLines, ToCols)) {
410			#if USE_SIGWINCH
411			ripoff_t *rop;
412			bool slk_visible = (SP != 0
413			&& SP->_slk != 0
414			&& !(SP->_slk->hidden));
415
416			if (slk_visible) {
417			slk_clear();
418			}
419			#endif
420			result = resize_term(ToLines, ToCols);
421
422			#if USE_SIGWINCH
423			_nc_ungetch(SP, KEY_RESIZE); /* so application can know this */
424			clearok(curscr, TRUE); /* screen contents are unknown */
425
426			/* ripped-off lines are a special case: if we did not lengthen
427			* them, we haven't moved them either. repaint them, too.
428			*
429			* for the rest - stdscr and other windows - the client has to
430			* decide which to repaint, since without panels, ncurses does
431			* not know which are really on top.
432			*/
433			for (each_ripoff(rop)) {
434			if (rop->win != stdscr
435			&& rop->win != 0
436			&& rop->line < 0) {
437
438			if (rop->hook != _nc_slk_initialize) {
439			touchwin(rop->win);
440			wnoutrefresh(rop->win);
441			}
442			}
443			}
444
445			/* soft-keys are a special case: we _know_ how to repaint them */
446			if (slk_visible) {
447			slk_restore();
448			slk_touch();
449
450			slk_refresh();
451			}
452			#endif
453			}
454			}
455
456			returnCode(result);
457			}