aboutsummaryrefslogtreecommitdiff
path: root/ncurses/base/lib_getstr.c
diff options
context:
space:
mode:
Diffstat (limited to 'ncurses/base/lib_getstr.c')
-rw-r--r--ncurses/base/lib_getstr.c224
1 files changed, 224 insertions, 0 deletions
diff --git a/ncurses/base/lib_getstr.c b/ncurses/base/lib_getstr.c
new file mode 100644
index 000000000000..274e87887371
--- /dev/null
+++ b/ncurses/base/lib_getstr.c
@@ -0,0 +1,224 @@
+/****************************************************************************
+ * Copyright (c) 1998-2002,2006 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: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
+ * and: Eric S. Raymond <esr@snark.thyrsus.com> *
+ ****************************************************************************/
+
+/*
+** lib_getstr.c
+**
+** The routine wgetstr().
+**
+*/
+
+#include <curses.priv.h>
+#include <term.h>
+
+MODULE_ID("$Id: lib_getstr.c,v 1.25 2006/01/12 00:33:52 tom Exp $")
+
+/*
+ * This wipes out the last character, no matter whether it was a tab, control
+ * or other character, and handles reverse wraparound.
+ */
+static char *
+WipeOut(WINDOW *win, int y, int x, char *first, char *last, bool echoed)
+{
+ if (last > first) {
+ *--last = '\0';
+ if (echoed) {
+ int y1 = win->_cury;
+ int x1 = win->_curx;
+
+ wmove(win, y, x);
+ waddstr(win, first);
+ getyx(win, y, x);
+ while (win->_cury < y1
+ || (win->_cury == y1 && win->_curx < x1))
+ waddch(win, (chtype) ' ');
+
+ wmove(win, y, x);
+ }
+ }
+ return last;
+}
+
+NCURSES_EXPORT(int)
+wgetnstr_events(WINDOW *win,
+ char *str,
+ int maxlen,
+ EVENTLIST_1st(_nc_eventlist * evl))
+{
+ TTY buf;
+ bool oldnl, oldecho, oldraw, oldcbreak;
+ char erasec;
+ char killc;
+ char *oldstr;
+ int ch;
+ int y, x;
+
+ T((T_CALLED("wgetnstr(%p,%p, %d)"), win, str, maxlen));
+
+ if (!win)
+ returnCode(ERR);
+
+ _nc_get_tty_mode(&buf);
+
+ oldnl = SP->_nl;
+ oldecho = SP->_echo;
+ oldraw = SP->_raw;
+ oldcbreak = SP->_cbreak;
+ nl();
+ noecho();
+ noraw();
+ cbreak();
+
+ erasec = erasechar();
+ killc = killchar();
+
+ oldstr = str;
+ getyx(win, y, x);
+
+ if (is_wintouched(win) || (win->_flags & _HASMOVED))
+ wrefresh(win);
+
+ while ((ch = wgetch_events(win, evl)) != ERR) {
+ /*
+ * Some terminals (the Wyse-50 is the most common) generate
+ * a \n from the down-arrow key. With this logic, it's the
+ * user's choice whether to set kcud=\n for wgetch();
+ * terminating *getstr() with \n should work either way.
+ */
+ if (ch == '\n'
+ || ch == '\r'
+ || ch == KEY_DOWN
+ || ch == KEY_ENTER) {
+ if (oldecho == TRUE
+ && win->_cury == win->_maxy
+ && win->_scroll)
+ wechochar(win, (chtype) '\n');
+ break;
+ }
+#ifdef KEY_EVENT
+ if (ch == KEY_EVENT)
+ break;
+#endif
+#ifdef KEY_RESIZE
+ if (ch == KEY_RESIZE)
+ break;
+#endif
+ if (ch == erasec || ch == KEY_LEFT || ch == KEY_BACKSPACE) {
+ if (str > oldstr) {
+ str = WipeOut(win, y, x, oldstr, str, oldecho);
+ }
+ } else if (ch == killc) {
+ while (str > oldstr) {
+ str = WipeOut(win, y, x, oldstr, str, oldecho);
+ }
+ } else if (ch >= KEY_MIN
+ || (maxlen >= 0 && str - oldstr >= maxlen)) {
+ beep();
+ } else {
+ *str++ = ch;
+ if (oldecho == TRUE) {
+ int oldy = win->_cury;
+ if (waddch(win, (chtype) ch) == ERR) {
+ /*
+ * We can't really use the lower-right
+ * corner for input, since it'll mess
+ * up bookkeeping for erases.
+ */
+ win->_flags &= ~_WRAPPED;
+ waddch(win, (chtype) ' ');
+ str = WipeOut(win, y, x, oldstr, str, oldecho);
+ continue;
+ } else if (win->_flags & _WRAPPED) {
+ /*
+ * If the last waddch forced a wrap &
+ * scroll, adjust our reference point
+ * for erasures.
+ */
+ if (win->_scroll
+ && oldy == win->_maxy
+ && win->_cury == win->_maxy) {
+ if (--y <= 0) {
+ y = 0;
+ }
+ }
+ win->_flags &= ~_WRAPPED;
+ }
+ wrefresh(win);
+ }
+ }
+ }
+
+ win->_curx = 0;
+ win->_flags &= ~_WRAPPED;
+ if (win->_cury < win->_maxy)
+ win->_cury++;
+ wrefresh(win);
+
+ /* Restore with a single I/O call, to fix minor asymmetry between
+ * raw/noraw, etc.
+ */
+ SP->_nl = oldnl;
+ SP->_echo = oldecho;
+ SP->_raw = oldraw;
+ SP->_cbreak = oldcbreak;
+
+ _nc_set_tty_mode(&buf);
+
+ *str = '\0';
+ if (ch == ERR)
+ returnCode(ch);
+
+ T(("wgetnstr returns %s", _nc_visbuf(oldstr)));
+
+#ifdef KEY_EVENT
+ if (ch == KEY_EVENT)
+ returnCode(ch);
+#endif
+#ifdef KEY_RESIZE
+ if (ch == KEY_RESIZE)
+ returnCode(ch);
+#endif
+
+ returnCode(OK);
+}
+
+#ifdef NCURSES_WGETCH_EVENTS
+NCURSES_EXPORT(int)
+wgetnstr(WINDOW *win, char *str, int maxlen)
+{
+ returnCode(wgetnstr_events(win,
+ str,
+ maxlen,
+ EVENTLIST_1st((_nc_eventlist *) 0)));
+}
+#endif