mirror of
https://github.com/Aigor44/ncursesw-morphos.git
synced 2024-12-27 07:49:06 +08:00
b94faec6aa
+ continue integrating "sp-funcs" by Juergen Pfeifer (incomplete). + modify declaration of cur_term when broken-linker is used, but enable-reentrant is not, to match pre-5.7 (report by Charles Wilson).
675 lines
17 KiB
C
675 lines
17 KiB
C
/****************************************************************************
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* Copyright (c) 1998-2008,2009 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/****************************************************************************
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* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
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* and: Eric S. Raymond <esr@snark.thyrsus.com> *
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* and: Thomas E. Dickey 1996-on *
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* and: Juergen Pfeifer 2009 *
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****************************************************************************/
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/*
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** lib_getch.c
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**
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** The routine getch().
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**
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*/
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#include <curses.priv.h>
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MODULE_ID("$Id: lib_getch.c,v 1.101 2009/02/28 19:16:40 tom Exp $")
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#include <fifo_defs.h>
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#if USE_REENTRANT
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#define GetEscdelay(sp) (sp)->_ESCDELAY
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NCURSES_EXPORT(int)
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NCURSES_PUBLIC_VAR(ESCDELAY) (void)
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{
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return SP ? GetEscdelay(SP) : 1000;
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}
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#else
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#define GetEscdelay(sp) ESCDELAY
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NCURSES_EXPORT_VAR (int)
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ESCDELAY = 1000; /* max interval betw. chars in funkeys, in millisecs */
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#endif
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#if NCURSES_EXT_FUNCS
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NCURSES_EXPORT(int)
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NCURSES_SP_NAME(set_escdelay) (NCURSES_SP_DCLx int value)
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{
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int code = OK;
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#if USE_REENTRANT
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if (SP_PARM) {
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SP_PARM->_ESCDELAY = value;
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} else {
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code = ERR;
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}
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#else
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(void) SP_PARM;
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ESCDELAY = value;
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#endif
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return code;
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}
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#if NCURSES_SP_FUNCS
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NCURSES_EXPORT(int)
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set_escdelay(int value)
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{
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return NCURSES_SP_NAME(set_escdelay) (CURRENT_SCREEN, value);
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}
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#endif
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#endif /* NCURSES_EXT_FUNCS */
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static int
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_nc_use_meta(WINDOW *win)
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{
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SCREEN *sp = _nc_screen_of(win);
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return (sp ? sp->_use_meta : 0);
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}
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#ifdef NCURSES_WGETCH_EVENTS
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#define TWAIT_MASK (TW_ANY | TW_EVENT)
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#else
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#define TWAIT_MASK TW_ANY
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#endif
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/*
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* Check for mouse activity, returning nonzero if we find any.
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*/
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static int
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check_mouse_activity(SCREEN *sp, int delay EVENTLIST_2nd(_nc_eventlist * evl))
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{
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int rc;
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#if USE_SYSMOUSE
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if ((sp->_mouse_type == M_SYSMOUSE)
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&& (sp->_sysmouse_head < sp->_sysmouse_tail)) {
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return 2;
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}
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#endif
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rc = _nc_timed_wait(sp, TWAIT_MASK, delay, (int *) 0 EVENTLIST_2nd(evl));
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#if USE_SYSMOUSE
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if ((sp->_mouse_type == M_SYSMOUSE)
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&& (sp->_sysmouse_head < sp->_sysmouse_tail)
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&& (rc == 0)
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&& (errno == EINTR)) {
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rc |= TW_MOUSE;
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}
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#endif
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return rc;
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}
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static NCURSES_INLINE int
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fifo_peek(SCREEN *sp)
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{
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int ch = sp->_fifo[peek];
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TR(TRACE_IEVENT, ("peeking at %d", peek));
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p_inc();
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return ch;
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}
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static NCURSES_INLINE int
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fifo_pull(SCREEN *sp)
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{
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int ch;
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ch = sp->_fifo[head];
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TR(TRACE_IEVENT, ("pulling %s from %d", _nc_tracechar(sp, ch), head));
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if (peek == head) {
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h_inc();
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peek = head;
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} else
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h_inc();
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#ifdef TRACE
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if (USE_TRACEF(TRACE_IEVENT)) {
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_nc_fifo_dump(sp);
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_nc_unlock_global(tracef);
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}
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#endif
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return ch;
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}
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static NCURSES_INLINE int
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fifo_push(SCREEN *sp EVENTLIST_2nd(_nc_eventlist * evl))
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{
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int n;
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int ch = 0;
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int mask = 0;
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(void) mask;
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if (tail == -1)
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return ERR;
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#ifdef HIDE_EINTR
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again:
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errno = 0;
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#endif
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#ifdef NCURSES_WGETCH_EVENTS
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if (evl
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#if USE_GPM_SUPPORT || USE_EMX_MOUSE || USE_SYSMOUSE
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|| (sp->_mouse_fd >= 0)
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#endif
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) {
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mask = check_mouse_activity(sp, -1 EVENTLIST_2nd(evl));
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} else
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mask = 0;
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if (mask & TW_EVENT) {
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T(("fifo_push: ungetch KEY_EVENT"));
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_nc_ungetch(sp, KEY_EVENT);
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return KEY_EVENT;
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}
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#elif USE_GPM_SUPPORT || USE_EMX_MOUSE || USE_SYSMOUSE
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if (sp->_mouse_fd >= 0) {
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mask = check_mouse_activity(sp, -1 EVENTLIST_2nd(evl));
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}
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#endif
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#if USE_GPM_SUPPORT || USE_EMX_MOUSE
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if ((sp->_mouse_fd >= 0) && (mask & TW_MOUSE)) {
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sp->_mouse_event(sp);
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ch = KEY_MOUSE;
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n = 1;
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} else
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#endif
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#if USE_SYSMOUSE
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if ((sp->_mouse_type == M_SYSMOUSE)
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&& (sp->_sysmouse_head < sp->_sysmouse_tail)) {
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sp->_mouse_event(sp);
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ch = KEY_MOUSE;
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n = 1;
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} else if ((sp->_mouse_type == M_SYSMOUSE)
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&& (mask <= 0) && errno == EINTR) {
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sp->_mouse_event(sp);
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ch = KEY_MOUSE;
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n = 1;
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} else
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#endif
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{ /* Can block... */
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unsigned char c2 = 0;
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n = read(sp->_ifd, &c2, 1);
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ch = c2;
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}
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#ifdef HIDE_EINTR
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/*
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* Under System V curses with non-restarting signals, getch() returns
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* with value ERR when a handled signal keeps it from completing.
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* If signals restart system calls, OTOH, the signal is invisible
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* except to its handler.
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*
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* We don't want this difference to show. This piece of code
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* tries to make it look like we always have restarting signals.
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*/
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if (n <= 0 && errno == EINTR)
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goto again;
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#endif
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if ((n == -1) || (n == 0)) {
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TR(TRACE_IEVENT, ("read(%d,&ch,1)=%d, errno=%d", sp->_ifd, n, errno));
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ch = ERR;
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}
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TR(TRACE_IEVENT, ("read %d characters", n));
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sp->_fifo[tail] = ch;
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sp->_fifohold = 0;
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if (head == -1)
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head = peek = tail;
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t_inc();
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TR(TRACE_IEVENT, ("pushed %s at %d", _nc_tracechar(sp, ch), tail));
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#ifdef TRACE
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if (USE_TRACEF(TRACE_IEVENT)) {
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_nc_fifo_dump(sp);
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_nc_unlock_global(tracef);
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}
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#endif
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return ch;
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}
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static NCURSES_INLINE void
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fifo_clear(SCREEN *sp)
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{
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memset(sp->_fifo, 0, sizeof(sp->_fifo));
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head = -1;
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tail = peek = 0;
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}
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static int kgetch(SCREEN *EVENTLIST_2nd(_nc_eventlist * evl));
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static void
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recur_wrefresh(WINDOW *win)
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{
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#ifdef USE_PTHREADS
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SCREEN *sp = _nc_screen_of(win);
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if (_nc_use_pthreads && sp != CURRENT_SCREEN) {
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SCREEN *save_SP;
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/* temporarily switch to the window's screen to check/refresh */
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_nc_lock_global(curses);
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save_SP = CURRENT_SCREEN;
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_nc_set_screen(sp);
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recur_wrefresh(win);
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_nc_set_screen(save_SP);
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_nc_unlock_global(curses);
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} else
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#endif
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if ((is_wintouched(win) || (win->_flags & _HASMOVED))
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&& !(win->_flags & _ISPAD)) {
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wrefresh(win);
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}
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}
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static int
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recur_wgetnstr(WINDOW *win, char *buf)
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{
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SCREEN *sp = _nc_screen_of(win);
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int rc;
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if (sp != 0) {
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#ifdef USE_PTHREADS
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if (_nc_use_pthreads && sp != CURRENT_SCREEN) {
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SCREEN *save_SP;
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/* temporarily switch to the window's screen to get cooked input */
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_nc_lock_global(curses);
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save_SP = CURRENT_SCREEN;
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_nc_set_screen(sp);
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rc = recur_wgetnstr(win, buf);
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_nc_set_screen(save_SP);
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_nc_unlock_global(curses);
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} else
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#endif
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{
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sp->_called_wgetch = TRUE;
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rc = wgetnstr(win, buf, MAXCOLUMNS);
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sp->_called_wgetch = FALSE;
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}
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} else {
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rc = ERR;
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}
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return rc;
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}
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NCURSES_EXPORT(int)
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_nc_wgetch(WINDOW *win,
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unsigned long *result,
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int use_meta
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EVENTLIST_2nd(_nc_eventlist * evl))
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{
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SCREEN *sp;
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int ch;
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#ifdef NCURSES_WGETCH_EVENTS
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long event_delay = -1;
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#endif
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T((T_CALLED("_nc_wgetch(%p)"), win));
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*result = 0;
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sp = _nc_screen_of(win);
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if (win == 0 || sp == 0) {
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returnCode(ERR);
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}
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if (cooked_key_in_fifo()) {
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recur_wrefresh(win);
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*result = fifo_pull(sp);
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returnCode(*result >= KEY_MIN ? KEY_CODE_YES : OK);
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}
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#ifdef NCURSES_WGETCH_EVENTS
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if (evl && (evl->count == 0))
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evl = NULL;
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event_delay = _nc_eventlist_timeout(evl);
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#endif
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/*
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* Handle cooked mode. Grab a string from the screen,
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* stuff its contents in the FIFO queue, and pop off
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* the first character to return it.
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*/
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if (head == -1 &&
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!sp->_notty &&
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!sp->_raw &&
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!sp->_cbreak &&
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!sp->_called_wgetch) {
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char buf[MAXCOLUMNS], *bufp;
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int rc;
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TR(TRACE_IEVENT, ("filling queue in cooked mode"));
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rc = recur_wgetnstr(win, buf);
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/* ungetch in reverse order */
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#ifdef NCURSES_WGETCH_EVENTS
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if (rc != KEY_EVENT)
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#endif
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_nc_ungetch(sp, '\n');
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for (bufp = buf + strlen(buf); bufp > buf; bufp--)
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_nc_ungetch(sp, bufp[-1]);
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#ifdef NCURSES_WGETCH_EVENTS
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/* Return it first */
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if (rc == KEY_EVENT) {
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*result = rc;
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} else
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#endif
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*result = fifo_pull(sp);
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returnCode(*result >= KEY_MIN ? KEY_CODE_YES : OK);
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}
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if (win->_use_keypad != sp->_keypad_on)
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_nc_keypad(sp, win->_use_keypad);
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recur_wrefresh(win);
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if (win->_notimeout || (win->_delay >= 0) || (sp->_cbreak > 1)) {
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if (head == -1) { /* fifo is empty */
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int delay;
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int rc;
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TR(TRACE_IEVENT, ("timed delay in wgetch()"));
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if (sp->_cbreak > 1)
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delay = (sp->_cbreak - 1) * 100;
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else
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delay = win->_delay;
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#ifdef NCURSES_WGETCH_EVENTS
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if (event_delay >= 0 && delay > event_delay)
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delay = event_delay;
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#endif
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TR(TRACE_IEVENT, ("delay is %d milliseconds", delay));
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rc = check_mouse_activity(sp, delay EVENTLIST_2nd(evl));
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#ifdef NCURSES_WGETCH_EVENTS
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if (rc & TW_EVENT) {
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*result = KEY_EVENT;
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returnCode(KEY_CODE_YES);
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}
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#endif
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if (!rc) {
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returnCode(ERR);
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}
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}
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/* else go on to read data available */
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}
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if (win->_use_keypad) {
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/*
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* This is tricky. We only want to get special-key
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* events one at a time. But we want to accumulate
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* mouse events until either (a) the mouse logic tells
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* us it's picked up a complete gesture, or (b)
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* there's a detectable time lapse after one.
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*
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* Note: if the mouse code starts failing to compose
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* press/release events into clicks, you should probably
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* increase the wait with mouseinterval().
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*/
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int runcount = 0;
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int rc = 0;
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do {
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ch = kgetch(sp EVENTLIST_2nd(evl));
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if (ch == KEY_MOUSE) {
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++runcount;
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if (sp->_mouse_inline(sp))
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break;
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}
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if (sp->_maxclick < 0)
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break;
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} while
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(ch == KEY_MOUSE
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&& (((rc = check_mouse_activity(sp, sp->_maxclick
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EVENTLIST_2nd(evl))) != 0
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&& !(rc & TW_EVENT))
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|| !sp->_mouse_parse(sp, runcount)));
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#ifdef NCURSES_WGETCH_EVENTS
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if ((rc & TW_EVENT) && !(ch == KEY_EVENT)) {
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_nc_ungetch(sp, ch);
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ch = KEY_EVENT;
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}
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#endif
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if (runcount > 0 && ch != KEY_MOUSE) {
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#ifdef NCURSES_WGETCH_EVENTS
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/* mouse event sequence ended by an event, report event */
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if (ch == KEY_EVENT) {
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_nc_ungetch(sp, KEY_MOUSE); /* FIXME This interrupts a gesture... */
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} else
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#endif
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{
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/* mouse event sequence ended by keystroke, store keystroke */
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_nc_ungetch(sp, ch);
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ch = KEY_MOUSE;
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}
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}
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} else {
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if (head == -1)
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fifo_push(sp EVENTLIST_2nd(evl));
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ch = fifo_pull(sp);
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}
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if (ch == ERR) {
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#if USE_SIZECHANGE
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if (_nc_handle_sigwinch(sp)) {
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_nc_update_screensize(sp);
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/* resizeterm can push KEY_RESIZE */
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if (cooked_key_in_fifo()) {
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*result = fifo_pull(sp);
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returnCode(*result >= KEY_MIN ? KEY_CODE_YES : OK);
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}
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}
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#endif
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returnCode(ERR);
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}
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/*
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* If echo() is in effect, display the printable version of the
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* key on the screen. Carriage return and backspace are treated
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* specially by Solaris curses:
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*
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* If carriage return is defined as a function key in the
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* terminfo, e.g., kent, then Solaris may return either ^J (or ^M
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* if nonl() is set) or KEY_ENTER depending on the echo() mode.
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* We echo before translating carriage return based on nonl(),
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* since the visual result simply moves the cursor to column 0.
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*
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* Backspace is a different matter. Solaris curses does not
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* translate it to KEY_BACKSPACE if kbs=^H. This does not depend
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* on the stty modes, but appears to be a hardcoded special case.
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* This is a difference from ncurses, which uses the terminfo entry.
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* However, we provide the same visual result as Solaris, moving the
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* cursor to the left.
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*/
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if (sp->_echo && !(win->_flags & _ISPAD)) {
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chtype backup = (ch == KEY_BACKSPACE) ? '\b' : ch;
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if (backup < KEY_MIN)
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wechochar(win, backup);
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}
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/*
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* Simulate ICRNL mode
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*/
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|
if ((ch == '\r') && sp->_nl)
|
|
ch = '\n';
|
|
|
|
/* Strip 8th-bit if so desired. We do this only for characters that
|
|
* are in the range 128-255, to provide compatibility with terminals
|
|
* that display only 7-bit characters. Note that 'ch' may be a
|
|
* function key at this point, so we mustn't strip _those_.
|
|
*/
|
|
if (!use_meta)
|
|
if ((ch < KEY_MIN) && (ch & 0x80))
|
|
ch &= 0x7f;
|
|
|
|
T(("wgetch returning : %s", _nc_tracechar(sp, ch)));
|
|
|
|
*result = ch;
|
|
returnCode(ch >= KEY_MIN ? KEY_CODE_YES : OK);
|
|
}
|
|
|
|
#ifdef NCURSES_WGETCH_EVENTS
|
|
NCURSES_EXPORT(int)
|
|
wgetch_events(WINDOW *win, _nc_eventlist * evl)
|
|
{
|
|
int code;
|
|
unsigned long value;
|
|
|
|
T((T_CALLED("wgetch_events(%p,%p)"), win, evl));
|
|
code = _nc_wgetch(win,
|
|
&value,
|
|
_nc_use_meta(win)
|
|
EVENTLIST_2nd(evl));
|
|
if (code != ERR)
|
|
code = value;
|
|
returnCode(code);
|
|
}
|
|
#endif
|
|
|
|
NCURSES_EXPORT(int)
|
|
wgetch(WINDOW *win)
|
|
{
|
|
int code;
|
|
unsigned long value;
|
|
|
|
T((T_CALLED("wgetch(%p)"), win));
|
|
code = _nc_wgetch(win,
|
|
&value,
|
|
_nc_use_meta(win)
|
|
EVENTLIST_2nd((_nc_eventlist *) 0));
|
|
if (code != ERR)
|
|
code = value;
|
|
returnCode(code);
|
|
}
|
|
|
|
/*
|
|
** int
|
|
** kgetch()
|
|
**
|
|
** Get an input character, but take care of keypad sequences, returning
|
|
** an appropriate code when one matches the input. After each character
|
|
** is received, set an alarm call based on ESCDELAY. If no more of the
|
|
** sequence is received by the time the alarm goes off, pass through
|
|
** the sequence gotten so far.
|
|
**
|
|
** This function must be called when there are no cooked keys in queue.
|
|
** (that is head==-1 || peek==head)
|
|
**
|
|
*/
|
|
|
|
static int
|
|
kgetch(SCREEN *sp EVENTLIST_2nd(_nc_eventlist * evl))
|
|
{
|
|
TRIES *ptr;
|
|
int ch = 0;
|
|
int timeleft = GetEscdelay(sp);
|
|
|
|
TR(TRACE_IEVENT, ("kgetch() called"));
|
|
|
|
ptr = sp->_keytry;
|
|
|
|
for (;;) {
|
|
if (cooked_key_in_fifo() && sp->_fifo[head] >= KEY_MIN) {
|
|
break;
|
|
} else if (!raw_key_in_fifo()) {
|
|
ch = fifo_push(sp EVENTLIST_2nd(evl));
|
|
if (ch == ERR) {
|
|
peek = head; /* the keys stay uninterpreted */
|
|
return ERR;
|
|
}
|
|
#ifdef NCURSES_WGETCH_EVENTS
|
|
else if (ch == KEY_EVENT) {
|
|
peek = head; /* the keys stay uninterpreted */
|
|
return fifo_pull(sp); /* Remove KEY_EVENT from the queue */
|
|
}
|
|
#endif
|
|
}
|
|
|
|
ch = fifo_peek(sp);
|
|
if (ch >= KEY_MIN) {
|
|
/* If not first in queue, somebody put this key there on purpose in
|
|
* emergency. Consider it higher priority than the unfinished
|
|
* keysequence we are parsing.
|
|
*/
|
|
peek = head;
|
|
/* assume the key is the last in fifo */
|
|
t_dec(); /* remove the key */
|
|
return ch;
|
|
}
|
|
|
|
TR(TRACE_IEVENT, ("ch: %s", _nc_tracechar(sp, (unsigned char) ch)));
|
|
while ((ptr != NULL) && (ptr->ch != (unsigned char) ch))
|
|
ptr = ptr->sibling;
|
|
|
|
if (ptr == NULL) {
|
|
TR(TRACE_IEVENT, ("ptr is null"));
|
|
break;
|
|
}
|
|
TR(TRACE_IEVENT, ("ptr=%p, ch=%d, value=%d",
|
|
ptr, ptr->ch, ptr->value));
|
|
|
|
if (ptr->value != 0) { /* sequence terminated */
|
|
TR(TRACE_IEVENT, ("end of sequence"));
|
|
if (peek == tail)
|
|
fifo_clear(sp);
|
|
else
|
|
head = peek;
|
|
return (ptr->value);
|
|
}
|
|
|
|
ptr = ptr->child;
|
|
|
|
if (!raw_key_in_fifo()) {
|
|
int rc;
|
|
|
|
TR(TRACE_IEVENT, ("waiting for rest of sequence"));
|
|
rc = check_mouse_activity(sp, timeleft EVENTLIST_2nd(evl));
|
|
#ifdef NCURSES_WGETCH_EVENTS
|
|
if (rc & TW_EVENT) {
|
|
TR(TRACE_IEVENT, ("interrupted by a user event"));
|
|
/* FIXME Should have preserved remainder timeleft for reuse... */
|
|
peek = head; /* Restart interpreting later */
|
|
return KEY_EVENT;
|
|
}
|
|
#endif
|
|
if (!rc) {
|
|
TR(TRACE_IEVENT, ("ran out of time"));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
ch = fifo_pull(sp);
|
|
peek = head;
|
|
return ch;
|
|
}
|