701 lines
15 KiB
Modula-2
701 lines
15 KiB
Modula-2
/* $NetBSD: menu_sys.def,v 1.29 2002/04/04 14:11:23 blymn Exp $ */
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/*
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* Copyright 1997 Piermont Information Systems Inc.
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* All rights reserved.
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*
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* Written by Philip A. Nelson for Piermont Information Systems Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software develooped for the NetBSD Project by
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* Piermont Information Systems Inc.
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* 4. The name of Piermont Information Systems Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/* menu_sys.defs -- Menu system standard routines. */
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#include <string.h>
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#include <ctype.h>
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#define REQ_EXECUTE 1000
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#define REQ_NEXT_ITEM 1001
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#define REQ_PREV_ITEM 1002
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#define REQ_REDISPLAY 1003
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#define REQ_SCROLLDOWN 1004
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#define REQ_SCROLLUP 1005
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#define REQ_HELP 1006
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/* Macros */
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#define MAX(x,y) ((x)>(y)?(x):(y))
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#define MIN(x,y) ((x)<(y)?(x):(y))
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/* Initialization state. */
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static int __menu_init = 0;
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int __m_endwin = 0;
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static int max_lines = 0, max_cols = 0;
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static char *scrolltext = " <: page up, >: page down";
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static menudesc *menus = menu_def;
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#ifdef DYNAMIC_MENUS
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static int num_menus = 0;
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static int num_avail = 0;
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#define DYN_INIT_NUM 32
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#endif
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/* prototypes for in here! */
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static void init_menu (struct menudesc *m);
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static char opt_ch (int op_no);
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static void post_menu (struct menudesc *m);
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static void process_help (struct menudesc *m, int num);
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static void process_req (struct menudesc *m, int num, int req);
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static int menucmd (WINDOW *w);
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#ifndef NULL
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#define NULL (void *)0
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#endif
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/* menu system processing routines */
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#define mbeep() (void)fputc('\a', stderr)
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static int
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menucmd (WINDOW *w)
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{
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int ch;
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while (TRUE) {
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ch = wgetch(w);
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switch (ch) {
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case '\n':
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return REQ_EXECUTE;
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case '\016': /* Contnrol-P */
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case KEY_DOWN:
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return REQ_NEXT_ITEM;
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case '\020': /* Control-N */
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case KEY_UP:
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return REQ_PREV_ITEM;
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case '\014': /* Control-L */
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return REQ_REDISPLAY;
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case '<':
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case '\010': /* Control-H (backspace) */
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case KEY_PPAGE:
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return REQ_SCROLLUP;
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case '\026':
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case '>':
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case ' ':
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case KEY_NPAGE:
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return REQ_SCROLLDOWN;
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case '?':
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return REQ_HELP;
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case '\033': /* esc-v is scroll down */
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ch = wgetch(w);
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if (ch == 'v')
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return REQ_SCROLLUP;
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else
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ch = 0; /* zap char so we beep */
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}
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if (isalpha(ch))
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return (ch);
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mbeep();
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wrefresh(w);
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}
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}
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static void
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init_menu (struct menudesc *m)
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{
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int wmax;
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int hadd, wadd, exithadd;
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int i;
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hadd = ((m->mopt & MC_NOBOX) ? 0 : 2);
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wadd = ((m->mopt & MC_NOBOX) ? 2 : 4);
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hadd += strlen(m->title) != 0 ? 2 : 0;
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exithadd = ((m->mopt & MC_NOEXITOPT) ? 0 : 1);
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wmax = strlen(m->title);
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/* Calculate h? h == number of visible options. */
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if (m->h == 0) {
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m->h = m->numopts + exithadd;
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if (m->h + m->y + hadd >= max_lines && (m->mopt & MC_SCROLL))
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m->h = max_lines - m->y - hadd ;
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}
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/* Check window heights and set scrolling */
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if (m->h < m->numopts + exithadd) {
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if (!(m->mopt & MC_SCROLL) || m->h < 3) {
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endwin();
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(void) fprintf (stderr,
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"Window too short for menu \"%s\"\n",
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m->title);
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exit(1);
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}
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} else
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m->mopt &= ~MC_SCROLL;
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/* check for screen fit */
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if (m->y + m->h + hadd > max_lines) {
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endwin();
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(void) fprintf (stderr,
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"Screen too short for menu \"%s\"\n", m->title);
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exit(1);
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}
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/* Calculate w? */
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if (m->w == 0) {
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if (m->mopt & MC_SCROLL)
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wmax = MAX(wmax,strlen(scrolltext));
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for (i=0; i < m->numopts; i++ )
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wmax = MAX(wmax,strlen(m->opts[i].opt_name)+3);
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m->w = wmax;
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}
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/* check and adjust for screen fit */
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if (m->w + wadd > max_cols) {
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endwin();
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(void) fprintf (stderr,
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"Screen too narrow for menu \"%s\"\n", m->title);
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exit(1);
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}
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if (m->x == -1)
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m->x = (max_cols - (m->w + wadd)) / 2; /* center */
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else if (m->x + m->w + wadd > max_cols)
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m->x = max_cols - (m->w + wadd);
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/* Get the windows. */
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m->mw = newwin(m->h+hadd, m->w+wadd, m->y, m->x);
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keypad(m->mw, TRUE); /* enable multi-key assembling for win */
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if (m->mw == NULL) {
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endwin();
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(void) fprintf (stderr,
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"Could not create window for menu \"%s\"\n", m->title);
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exit(1);
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}
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/* XXX is it even worth doing this right? */
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if (has_colors()) {
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wbkgd(m->mw, COLOR_PAIR(1));
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wattrset(m->mw, COLOR_PAIR(1));
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}
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}
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static char
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opt_ch (int op_no)
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{
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char c;
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if (op_no < 25) {
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c = 'a' + op_no;
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if (c >= 'x') c++;
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} else
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c = 'A' + op_no - 25;
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return (char) c;
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}
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static void
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post_menu (struct menudesc *m)
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{
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int i;
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int hasbox, cury, maxy, selrow, lastopt;
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int tadd;
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char optstr[5];
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if (m->mopt & MC_NOBOX) {
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cury = 0;
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maxy = m->h;
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hasbox = 0;
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} else {
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cury = 1;
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maxy = m->h+1;
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hasbox = 1;
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}
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/* Clear the window */
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wclear (m->mw);
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tadd = strlen(m->title) ? 2 : 0;
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if (tadd) {
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mvwaddstr(m->mw, cury, cury, " ");
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mvwaddstr(m->mw, cury, cury + 1, m->title);
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cury += 2;
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maxy += 2;
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}
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/* Set defaults, calculate lastopt. */
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selrow = -1;
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if (m->mopt & MC_SCROLL) {
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lastopt = MIN(m->numopts, m->topline+m->h-1);
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maxy -= 1;
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} else
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lastopt = m->numopts;
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for (i=m->topline; i<lastopt; i++, cury++) {
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if (m->cursel == i) {
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mvwaddstr (m->mw, cury, hasbox, ">");
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wstandout(m->mw);
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selrow = cury;
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} else
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mvwaddstr (m->mw, cury, hasbox, " ");
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if (!(m->mopt & MC_NOSHORTCUT)) {
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(void) sprintf (optstr, "%c: ", opt_ch(i));
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waddstr (m->mw, optstr);
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}
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waddstr (m->mw, m->opts[i].opt_name);
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if (m->cursel == i)
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wstandend(m->mw);
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}
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/* Add the exit option. */
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if (!(m->mopt & MC_NOEXITOPT) && cury < maxy) {
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if (m->cursel >= m->numopts) {
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mvwaddstr (m->mw, cury, hasbox, ">");
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wstandout(m->mw);
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selrow = cury;
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} else
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mvwaddstr (m->mw, cury, hasbox, " ");
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if (!(m->mopt & MC_NOSHORTCUT))
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waddstr (m->mw, "x: ");
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waddstr (m->mw, m->exitstr);
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if (m->cursel >= m->numopts)
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wstandend(m->mw);
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cury++;
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}
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/* Add the scroll line */
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if (m->mopt & MC_SCROLL) {
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mvwaddstr (m->mw, cury, hasbox, scrolltext);
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if (selrow < 0)
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selrow = cury;
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}
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/* Add the box. */
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if (!(m->mopt & MC_NOBOX))
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box(m->mw, 0, 0);
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wmove(m->mw, selrow, hasbox);
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}
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static void
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process_help (struct menudesc *m, int num)
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{
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char *help = m->helpstr;
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int lineoff = 0;
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int curoff = 0;
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int again;
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int winin;
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/* Is there help? */
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if (!help) {
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mbeep();
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return;
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}
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/* Display the help information. */
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do {
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if (lineoff < curoff) {
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help = m->helpstr;
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curoff = 0;
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}
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while (*help && curoff < lineoff) {
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if (*help == '\n')
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curoff++;
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help++;
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}
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wclear(stdscr);
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mvwaddstr (stdscr, 0, 0,
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"Help: exit: x, page up: u <, page down: d >");
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mvwaddstr (stdscr, 2, 0, help);
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wmove (stdscr, 1, 0);
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wrefresh(stdscr);
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do {
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winin = wgetch(stdscr);
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if (winin < KEY_MIN)
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winin = tolower(winin);
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again = 0;
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switch (winin) {
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case '<':
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case 'u':
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case KEY_UP:
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case KEY_LEFT:
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case KEY_PPAGE:
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if (lineoff)
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lineoff -= max_lines - 2;
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else
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again = 1;
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break;
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case '>':
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case 'd':
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case KEY_DOWN:
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case KEY_RIGHT:
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case KEY_NPAGE:
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if (*help)
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lineoff += max_lines - 2;
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else
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again = 1;
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break;
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case 'q':
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break;
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case 'x':
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winin = 'q';
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break;
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default:
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again = 1;
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}
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if (again)
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mbeep();
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} while (again);
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} while (winin != 'q');
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/* Restore current menu */
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wclear(stdscr);
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wrefresh(stdscr);
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if (m->post_act)
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(*m->post_act)();
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}
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static void
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process_req (struct menudesc *m, int num, int req)
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{
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int ch;
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int hasexit = (m->mopt & MC_NOEXITOPT ? 0 : 1 );
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int refresh = 0;
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int scroll_sel = 0;
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if (req == REQ_EXECUTE)
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return;
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else if (req == REQ_NEXT_ITEM) {
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if (m->cursel < m->numopts + hasexit - 1) {
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m->cursel++;
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scroll_sel = 1;
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refresh = 1;
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if (m->mopt & MC_SCROLL &&
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m->cursel >= m->topline + m->h -1 )
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m->topline += 1;
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} else
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mbeep();
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} else if (req == REQ_PREV_ITEM) {
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if (m->cursel > 0) {
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m->cursel--;
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scroll_sel = 1;
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refresh = 1;
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if (m->cursel < m->topline )
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m->topline -= 1;
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} else
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mbeep();
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} else if (req == REQ_REDISPLAY) {
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wclear(stdscr);
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wrefresh(stdscr);
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if (m->post_act)
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(*m->post_act)();
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refresh = 1;
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} else if (req == REQ_HELP) {
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process_help (m, num);
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refresh = 1;
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} else if (req == REQ_SCROLLUP) {
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if (!(m->mopt & MC_SCROLL))
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mbeep();
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else if (m->topline == 0)
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mbeep();
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else {
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m->topline = MAX(0,m->topline-m->h+1);
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m->cursel = MAX(0, m->cursel-m->h+1);
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wclear (m->mw);
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refresh = 1;
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}
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} else if (req == REQ_SCROLLDOWN) {
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if (!(m->mopt & MC_SCROLL))
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mbeep();
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else if (m->topline + m->h - 1 >= m->numopts + hasexit)
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mbeep();
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else {
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m->topline = MIN(m->topline+m->h-1,
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m->numopts+hasexit-m->h+1);
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m->cursel = MIN(m->numopts-1, m->cursel+m->h-1);
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wclear (m->mw);
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refresh = 1;
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}
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} else {
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ch = req;
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if (ch == 'x' && hasexit) {
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m->cursel = m->numopts;
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scroll_sel = 1;
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refresh = 1;
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} else
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if (!(m->mopt & MC_NOSHORTCUT)) {
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if (ch > 'z')
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ch = 255;
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if (ch >= 'a') {
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if (ch > 'x') ch--;
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ch = ch - 'a';
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} else
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ch = 25 + ch - 'A';
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if (ch < 0 || ch >= m->numopts)
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mbeep();
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else {
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m->cursel = ch;
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scroll_sel = 1;
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refresh = 1;
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}
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} else
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mbeep();
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}
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if (m->mopt & MC_SCROLL && scroll_sel) {
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while (m->cursel >= m->topline + m->h -1 )
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m->topline = MIN(m->topline+m->h-1,
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m->numopts+hasexit-m->h+1);
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while (m->cursel < m->topline)
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m->topline = MAX(0,m->topline-m->h+1);
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}
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if (refresh) {
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post_menu (m);
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wrefresh (m->mw);
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}
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}
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int
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menu_init (void)
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{
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if (__menu_init)
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return 0;
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if (initscr() == NULL)
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return 1;
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cbreak();
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noecho();
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/* XXX Should be configurable but it almost isn't worth it. */
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if (has_colors()) {
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start_color();
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init_pair(1, COLOR_WHITE, COLOR_BLUE);
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bkgd(COLOR_PAIR(1));
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attrset(COLOR_PAIR(1));
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}
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max_lines = getmaxy(stdscr);
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max_cols = getmaxx(stdscr);
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keypad(stdscr, TRUE);
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#ifdef DYNAMIC_MENUS
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num_menus = DYN_INIT_NUM;
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while (num_menus < DYN_MENU_START)
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num_menus *= 2;
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menus = (menudesc *) malloc(sizeof(menudesc)*num_menus);
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if (menus == NULL)
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return 2;
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(void) memset ((void *)menus, 0, sizeof(menudesc)*num_menus);
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(void) memcpy ((void *)menus, (void *)menu_def,
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sizeof(menudesc)*DYN_MENU_START);
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num_avail = num_menus - DYN_MENU_START;
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#endif
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__menu_init = 1;
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return (0);
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}
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void
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process_menu (int num)
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{
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int sel = 0;
|
||
int req, done;
|
||
int last_num;
|
||
|
||
struct menudesc *m;
|
||
|
||
m = &menus[num];
|
||
|
||
done = FALSE;
|
||
|
||
/* Initialize? */
|
||
if (menu_init()) {
|
||
__menu_initerror();
|
||
return;
|
||
}
|
||
|
||
if (__m_endwin) {
|
||
wclear(stdscr);
|
||
wrefresh(stdscr);
|
||
__m_endwin = 0;
|
||
}
|
||
if (m->mw == NULL)
|
||
init_menu (m);
|
||
|
||
/* Always preselect option 0 and display from 0! */
|
||
m->cursel = 0;
|
||
m->topline = 0;
|
||
|
||
while (!done) {
|
||
last_num = num;
|
||
if (__m_endwin) {
|
||
wclear(stdscr);
|
||
wrefresh(stdscr);
|
||
__m_endwin = 0;
|
||
}
|
||
/* Process the display action */
|
||
if (m->post_act)
|
||
(*m->post_act)();
|
||
post_menu (m);
|
||
wrefresh (m->mw);
|
||
|
||
while ((req = menucmd (m->mw)) != REQ_EXECUTE)
|
||
process_req (m, num, req);
|
||
|
||
sel = m->cursel;
|
||
wclear (m->mw);
|
||
wrefresh (m->mw);
|
||
|
||
/* Process the items */
|
||
if (sel < m->numopts) {
|
||
if (m->opts[sel].opt_flags & OPT_ENDWIN) {
|
||
endwin();
|
||
__m_endwin = 1;
|
||
}
|
||
if (m->opts[sel].opt_action)
|
||
done = (*m->opts[sel].opt_action)(m);
|
||
if (m->opts[sel].opt_menu != -1) {
|
||
if (m->opts[sel].opt_flags & OPT_SUB)
|
||
process_menu (m->opts[sel].opt_menu);
|
||
else
|
||
num = m->opts[sel].opt_menu;
|
||
}
|
||
|
||
if (m->opts[sel].opt_flags & OPT_EXIT)
|
||
done = TRUE;
|
||
|
||
} else
|
||
done = TRUE;
|
||
|
||
/* Reselect m just in case */
|
||
if (num != last_num) {
|
||
m = &menus[num];
|
||
|
||
/* Initialize? */
|
||
if (m->mw == NULL)
|
||
init_menu (m);
|
||
if (m->post_act)
|
||
(*m->post_act)();
|
||
}
|
||
}
|
||
|
||
/* Process the exit action */
|
||
if (m->exit_act)
|
||
(*m->exit_act)();
|
||
}
|
||
|
||
/* Control L is end of standard routines, remaining only for dynamic. */
|
||
|
||
/* Beginning of routines for dynamic menus. */
|
||
|
||
/* local prototypes */
|
||
static int double_menus (void);
|
||
|
||
static int
|
||
double_menus (void)
|
||
{
|
||
menudesc *temp;
|
||
|
||
temp = (menudesc *) malloc(sizeof(menudesc)*num_menus*2);
|
||
if (temp == NULL)
|
||
return 0;
|
||
(void) memset ((void *)temp, 0,
|
||
sizeof(menudesc)*num_menus*2);
|
||
(void) memcpy ((void *)temp, (void *)menus,
|
||
sizeof(menudesc)*num_menus);
|
||
free (menus);
|
||
menus = temp;
|
||
num_avail = num_menus;
|
||
num_menus *= 2;
|
||
|
||
return 1;
|
||
}
|
||
|
||
int
|
||
new_menu (char * title, menu_ent * opts, int numopts,
|
||
int x, int y, int h, int w, int mopt,
|
||
void (*post_act)(void), void (*exit_act)(void), char * help)
|
||
{
|
||
int ix;
|
||
|
||
/* Check for free menu entry. */
|
||
if (num_avail == 0)
|
||
if (!double_menus ())
|
||
return -1;
|
||
|
||
/* Find free menu entry. */
|
||
for (ix = DYN_MENU_START; ix < num_menus && menus[ix].mopt & MC_VALID;
|
||
ix++) /* do nothing */;
|
||
|
||
/* if ix == num_menus ... panic */
|
||
|
||
/* Set Entries */
|
||
menus[ix].title = title ? title : "";
|
||
menus[ix].opts = opts;
|
||
menus[ix].numopts = numopts;
|
||
menus[ix].x = x;
|
||
menus[ix].y = y;
|
||
menus[ix].h = h;
|
||
menus[ix].w = w;
|
||
menus[ix].mopt = mopt | MC_VALID;
|
||
menus[ix].post_act = post_act;
|
||
menus[ix].exit_act = exit_act;
|
||
menus[ix].helpstr = help;
|
||
menus[ix].exitstr = "Exit";
|
||
|
||
init_menu (&menus[ix]);
|
||
|
||
return ix;
|
||
}
|
||
|
||
void
|
||
free_menu (int menu_no)
|
||
{
|
||
if (menu_no < num_menus) {
|
||
menus[menu_no].mopt &= ~MC_VALID;
|
||
if (menus[menu_no].mw != NULL)
|
||
delwin (menus[menu_no].mw);
|
||
}
|
||
}
|