--- /dev/null
+/****************************************************************************
+ * Copyright (c) 1998 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 <dickey@clark.net> 1996,1997 *
+ ****************************************************************************/
+
+#include <curses.priv.h>
+
+MODULE_ID("$Id: wresize.c,v 1.12 1999/02/27 18:57:31 tom Exp $")
+
+/*
+ * Reallocate a curses WINDOW struct to either shrink or grow to the specified
+ * new lines/columns. If it grows, the new character cells are filled with
+ * blanks. The application is responsible for repainting the blank area.
+ */
+
+#define DOALLOC(p,t,n) typeRealloc(t, n, p)
+#define ld_ALLOC(p,n) DOALLOC(p,struct ldat,n)
+#define c_ALLOC(p,n) DOALLOC(p,chtype,n)
+
+int
+wresize(WINDOW *win, int ToLines, int ToCols)
+{
+ register int row;
+ int size_x, size_y;
+ struct ldat *pline;
+ chtype blank;
+
+#ifdef TRACE
+ T((T_CALLED("wresize(%p,%d,%d)"), win, ToLines, ToCols));
+ if (win) {
+ TR(TRACE_UPDATE, ("...beg (%d, %d), max(%d,%d), reg(%d,%d)",
+ win->_begy, win->_begx,
+ win->_maxy, win->_maxx,
+ win->_regtop, win->_regbottom));
+ if (_nc_tracing & TRACE_UPDATE)
+ _tracedump("...before", win);
+ }
+#endif
+
+ if (!win || --ToLines < 0 || --ToCols < 0)
+ returnCode(ERR);
+
+ size_x = win->_maxx;
+ size_y = win->_maxy;
+
+ if (ToLines == size_y
+ && ToCols == size_x)
+ returnCode(OK);
+
+ pline = (win->_flags & _SUBWIN) ? win->_parent->_line : 0;
+
+ /*
+ * If the number of lines has changed, adjust the size of the overall
+ * vector:
+ */
+ if (ToLines != size_y) {
+ if (! (win->_flags & _SUBWIN)) {
+ for (row = ToLines+1; row <= size_y; row++)
+ free((char *)(win->_line[row].text));
+ }
+
+ win->_line = ld_ALLOC(win->_line, ToLines+1);
+ if (win->_line == 0)
+ returnCode(ERR);
+
+ for (row = size_y+1; row <= ToLines; row++) {
+ win->_line[row].text = 0;
+ win->_line[row].firstchar = 0;
+ win->_line[row].lastchar = ToCols;
+ if ((win->_flags & _SUBWIN)) {
+ win->_line[row].text =
+ &pline[win->_begy + row].text[win->_begx];
+ }
+ }
+ }
+
+ /*
+ * Adjust the width of the columns:
+ */
+ blank = _nc_background(win);
+ for (row = 0; row <= ToLines; row++) {
+ chtype *s = win->_line[row].text;
+ int begin = (s == 0) ? 0 : size_x + 1;
+ int end = ToCols;
+
+ if_USE_SCROLL_HINTS(win->_line[row].oldindex = row);
+
+ if (ToCols != size_x || s == 0) {
+ if (! (win->_flags & _SUBWIN)) {
+ win->_line[row].text = s = c_ALLOC(s, ToCols+1);
+ if (win->_line[row].text == 0)
+ returnCode(ERR);
+ } else if (s == 0) {
+ win->_line[row].text = s =
+ &pline[win->_begy + row].text[win->_begx];
+ }
+
+ if (end >= begin) { /* growing */
+ if (win->_line[row].firstchar < begin)
+ win->_line[row].firstchar = begin;
+ win->_line[row].lastchar = ToCols;
+ do {
+ s[end] = blank;
+ } while (--end >= begin);
+ } else { /* shrinking */
+ win->_line[row].firstchar = 0;
+ win->_line[row].lastchar = ToCols;
+ }
+ }
+ }
+
+ /*
+ * Finally, adjust the parameters showing screen size and cursor
+ * position:
+ */
+ win->_maxx = ToCols;
+ win->_maxy = ToLines;
+
+ if (win->_regtop > win->_maxy)
+ win->_regtop = win->_maxy;
+ if (win->_regbottom > win->_maxy
+ || win->_regbottom == size_y)
+ win->_regbottom = win->_maxy;
+
+ if (win->_curx > win->_maxx)
+ win->_curx = win->_maxx;
+ if (win->_cury > win->_maxy)
+ win->_cury = win->_maxy;
+
+#ifdef TRACE
+ TR(TRACE_UPDATE, ("...beg (%d, %d), max(%d,%d), reg(%d,%d)",
+ win->_begy, win->_begx,
+ win->_maxy, win->_maxx,
+ win->_regtop, win->_regbottom));
+ if (_nc_tracing & TRACE_UPDATE)
+ _tracedump("...after:", win);
+#endif
+ returnCode(OK);
+}
projects / ncurses.git / blobdiff