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nethack/win/curses/cursmesg.c
PatR e991dd1b0c curses: getline vs DEL, ESC 
Support <delete> (aka <rubout>) during getline().  It doesn't actually
honor the current erase_char value set up for the terminal, just
treats DEL the same as ^H.  (The previous lack of support had nothing
to do with terminfo specifying ^H; the handling is hard-coded.)

tty treats escape while there's already some input as kill_char (erase
the input but get more from scratch) and returns ESC if there isn't.
curses was doing the first half but not the second, so not providing
any way to communicate "cancel" back to the core.  Fix is simple.

Other getline() bug fixes:
1] there was a wprintw("%*something") which was passing the value from
strlen (type 'size_t') to the "%*" argument (type 'int').  That's
always wrong (size_t is guaranteed to be unsigned) and could be severe
(if size_t is different width than int--as on current OSX systems--
depending upon the internals of argument passing).
2] strncpy() only supplies a terminating '\0' if the input is shorter
than the number of characters specified.

A lot of reformatting is warranted but I only did the getline routine
(manually, so might have missed stuff).
2019-02-08 14:54:40 -08:00

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/* vim:set cin ft=c sw=4 sts=4 ts=8 et ai cino=Ls\:0t0(0 : -*- mode:c;fill-column:80;tab-width:8;c-basic-offset:4;indent-tabs-mode:nil;c-file-style:"k&r" -*-*/
/* NetHack 3.6 cursmesg.c */
/* Copyright (c) Karl Garrison, 2010. */
/* NetHack may be freely redistributed. See license for details. */
#include "curses.h"
#include "hack.h"
#include "wincurs.h"
#include "cursmesg.h"
#include <ctype.h>
/* Message window routines for curses interface */
/* Private declatations */
typedef struct nhpm {
char *str; /* Message text */
long turn; /* Turn number for message */
struct nhpm *prev_mesg; /* Pointer to previous message */
struct nhpm *next_mesg; /* Pointer to next message */
} nhprev_mesg;
static void scroll_window(winid wid);
static void unscroll_window(winid wid);
static void directional_scroll(winid wid, int nlines);
static void mesg_add_line(char *mline);
static nhprev_mesg *get_msg_line(boolean reverse, int mindex);
static int turn_lines = 1;
static int mx = 0;
static int my = 0; /* message window text location */
static nhprev_mesg *first_mesg = NULL;
static nhprev_mesg *last_mesg = NULL;
static int max_messages;
static int num_messages = 0;
/* Write string to the message window. Attributes set by calling function. */
void
curses_message_win_puts(const char *message, boolean recursed)
{
int height, width, linespace;
char *tmpstr;
WINDOW *win = curses_get_nhwin(MESSAGE_WIN);
boolean border = curses_window_has_border(MESSAGE_WIN);
int message_length = strlen(message);
int border_space = 0;
static long suppress_turn = -1;
#if 1
/*
* Handled by core's use of putstr(WIN_MESSAGE,ATR_NOHISTORY,message)
* for intermediate counts, but get_count() also uses putmsghistory()
* for the final count, to remember that without showing it. But
* curses is using genl_putmsghistory() which just delivers the text
* via a normal pline(). This hides that at cost of not having it
* in ^P recall and being out of sync with DUMPLOG's message history.
*/
if (strncmp("Count:", message, 6) == 0) {
curses_count_window(message);
return;
}
#endif
if (suppress_turn == moves) {
return;
}
curses_get_window_size(MESSAGE_WIN, &height, &width);
if (border) {
border_space = 1;
if (mx < 1) {
mx = 1;
}
if (my < 1) {
my = 1;
}
}
linespace = ((width + border_space) - 3) - mx;
if (strcmp(message, "#") == 0) { /* Extended command or Count: */
if ((strcmp(toplines, "#") != 0)
/* Bottom of message window */
&& (my >= (height - 1 + border_space)) && (height != 1)) {
scroll_window(MESSAGE_WIN);
mx = width;
my--;
strcpy(toplines, message);
}
return;
}
if (!recursed) {
strcpy(toplines, message);
mesg_add_line((char *) message);
}
if (linespace < message_length) {
if (my >= (height - 1 + border_space)) {
/* bottom of message win */
if ((turn_lines > height) || (height == 1)) {
/* Pause until key is hit - Esc suppresses any further
messages that turn */
if (curses_more() == '\033') {
suppress_turn = moves;
return;
}
} else {
scroll_window(MESSAGE_WIN);
turn_lines++;
}
} else {
if (mx != border_space) {
my++;
mx = border_space;
}
}
}
if (height > 1) {
curses_toggle_color_attr(win, NONE, A_BOLD, ON);
}
if ((mx == border_space) && ((message_length + 2) > width)) {
tmpstr = curses_break_str(message, (width - 2), 1);
mvwprintw(win, my, mx, "%s", tmpstr);
mx += strlen(tmpstr);
if (strlen(tmpstr) < (size_t) (width - 2)) {
mx++;
}
free(tmpstr);
if (height > 1) {
curses_toggle_color_attr(win, NONE, A_BOLD, OFF);
}
tmpstr = curses_str_remainder(message, (width - 2), 1);
curses_message_win_puts(tmpstr, TRUE);
free(tmpstr);
} else {
mvwprintw(win, my, mx, "%s", message);
curses_toggle_color_attr(win, NONE, A_BOLD, OFF);
mx += message_length + 1;
}
wrefresh(win);
}
int
curses_block(boolean noscroll)
/* noscroll - blocking because of msgtype = stop/alert */
/* else blocking because window is full, so need to scroll after */
{
int height, width, ret = 0;
WINDOW *win = curses_get_nhwin(MESSAGE_WIN);
const char *resp = " \r\n\033"; /* space, enter, esc */
curses_get_window_size(MESSAGE_WIN, &height, &width);
curses_toggle_color_attr(win, MORECOLOR, NONE, ON);
mvwprintw(win, my, mx, ">>");
curses_toggle_color_attr(win, MORECOLOR, NONE, OFF);
wrefresh(win);
/* msgtype=stop should require space/enter rather than
* just any key, as we want to prevent YASD from
* riding direction keys. */
while ((ret = wgetch(win)) != 0 && !index(resp, (char) ret))
continue;
if (height == 1) {
curses_clear_unhighlight_message_window();
} else {
mvwprintw(win, my, mx, " ");
if (!noscroll) {
scroll_window(MESSAGE_WIN);
turn_lines = 1;
}
wrefresh(win);
}
return ret;
}
int
curses_more()
{
return curses_block(FALSE);
}
/* Clear the message window if one line; otherwise unhighlight old messages */
void
curses_clear_unhighlight_message_window()
{
int mh, mw, count;
boolean border = curses_window_has_border(MESSAGE_WIN);
WINDOW *win = curses_get_nhwin(MESSAGE_WIN);
turn_lines = 1;
curses_get_window_size(MESSAGE_WIN, &mh, &mw);
mx = 0;
if (border) {
mx++;
}
if (mh == 1) {
curses_clear_nhwin(MESSAGE_WIN);
} else {
mx += mw; /* Force new line on new turn */
if (border) {
for (count = 0; count < mh; count++) {
mvwchgat(win, count + 1, 1, mw, COLOR_PAIR(8), A_NORMAL, NULL);
}
} else {
for (count = 0; count < mh; count++) {
mvwchgat(win, count, 0, mw, COLOR_PAIR(8), A_NORMAL, NULL);
}
}
wnoutrefresh(win);
}
}
/* Reset message window cursor to starting position, and display most
recent messages. */
void
curses_last_messages()
{
boolean border = curses_window_has_border(MESSAGE_WIN);
nhprev_mesg *mesg;
int i;
if (border) {
mx = 1;
my = 1;
} else {
mx = 0;
my = 0;
}
for (i = (num_messages - 1); i > 0; i--) {
mesg = get_msg_line(TRUE, i);
if (mesg && mesg->str && *mesg->str)
curses_message_win_puts(mesg->str, TRUE);
}
curses_message_win_puts(toplines, TRUE);
}
/* Initialize list for message history */
void
curses_init_mesg_history()
{
max_messages = iflags.msg_history;
if (max_messages < 1) {
max_messages = 1;
}
if (max_messages > MESG_HISTORY_MAX) {
max_messages = MESG_HISTORY_MAX;
}
}
/* Display previous message window messages in reverse chron order */
void
curses_prev_mesg()
{
int count;
winid wid;
long turn = 0;
anything Id;
nhprev_mesg *mesg;
menu_item *selected = NULL;
wid = curses_get_wid(NHW_MENU);
curses_create_nhmenu(wid);
Id = zeroany;
for (count = 0; count < num_messages; count++) {
mesg = get_msg_line(TRUE, count);
if ((turn != mesg->turn) && (count != 0)) {
curses_add_menu(wid, NO_GLYPH, &Id, 0, 0, A_NORMAL, "---", FALSE);
}
curses_add_menu(wid, NO_GLYPH, &Id, 0, 0, A_NORMAL, mesg->str, FALSE);
turn = mesg->turn;
}
curses_end_menu(wid, "");
curses_select_menu(wid, PICK_NONE, &selected);
}
/* Display at the bottom of the message window without remembering the
line for ^P recall. Used for putstr(WIN_MESSAGE,ATR_NOHISTORY,text)
which core currently uses for 'Count: 123' and dolook's autodescribe.
popup_dialog is not currently implemented for this function. */
void
curses_count_window(const char *count_text)
{
int startx, starty, winx, winy;
int messageh, messagew;
static WINDOW *countwin = NULL;
if (!count_text) {
if (countwin)
delwin(countwin), countwin = NULL;
counting = FALSE;
return;
}
counting = TRUE;
curses_get_window_xy(MESSAGE_WIN, &winx, &winy);
curses_get_window_size(MESSAGE_WIN, &messageh, &messagew);
if (curses_window_has_border(MESSAGE_WIN)) {
winx++;
winy++;
}
winy += messageh - 1;
#ifdef PDCURSES
if (countwin)
curses_destroy_win(countwin), countwin = NULL;
#endif /* PDCURSES */
/* this used to specify a width of 25; that was adequate for 'Count: 123'
but not for dolook's autodescribe when it refers to a named monster */
if (!countwin)
countwin = newwin(1, messagew, winy, winx);
startx = 0;
starty = 0;
mvwprintw(countwin, starty, startx, "%s", count_text);
wrefresh(countwin);
}
/* Gets a "line" (buffer) of input. */
void
curses_message_win_getline(const char *prompt, char *answer, int buffer)
{
int height, width; /* of window */
char *tmpbuf, *p_answer; /* combined prompt + answer */
int nlines, maxlines, i; /* prompt + answer */
int promptline;
int promptx;
char **linestarts; /* pointers to start of each line */
char *tmpstr; /* for free() */
int maxy, maxx; /* linewrap / scroll */
int ch;
WINDOW *win = curses_get_nhwin(MESSAGE_WIN);
int border_space = 0;
int len = 0; /* of answer string */
boolean border = curses_window_has_border(MESSAGE_WIN);
*answer = '\0';
orig_cursor = curs_set(0);
curses_get_window_size(MESSAGE_WIN, &height, &width);
if (border) {
border_space = 1;
if (mx < 1)
mx = 1;
if (my < 1)
my = 1;
}
maxy = height - 1 + border_space;
maxx = width - 1 + border_space;
tmpbuf = (char *) alloc((unsigned) ((int) strlen(prompt) + buffer + 2));
maxlines = buffer / width * 2;
Strcpy(tmpbuf, prompt);
Strcat(tmpbuf, " ");
nlines = curses_num_lines(tmpbuf,width);
maxlines += nlines * 2;
linestarts = (char **) alloc((unsigned) (sizeof (char *) * maxlines));
p_answer = tmpbuf + strlen(tmpbuf);
linestarts[0] = tmpbuf;
if (mx > border_space) { /* newline */
if (my >= maxy)
scroll_window(MESSAGE_WIN);
else
my++;
mx = border_space;
}
curses_toggle_color_attr(win, NONE, A_BOLD, ON);
for (i = 0; i < nlines - 1; i++) {
tmpstr = curses_break_str(linestarts[i], width - 1, 1);
linestarts[i + 1] = linestarts[i] + (int) strlen(tmpstr);
if (*linestarts[i + 1] == ' ')
linestarts[i + 1]++;
mvwaddstr(win, my, mx, tmpstr);
free(tmpstr);
if (++my >= maxy) {
scroll_window(MESSAGE_WIN);
my--;
}
}
mvwaddstr(win, my, mx, linestarts[nlines - 1]);
mx = promptx = (int) strlen(linestarts[nlines - 1]) + border_space;
promptline = nlines - 1;
while (1) {
mx = (int) strlen(linestarts[nlines - 1]) + border_space;
if (mx > maxx) {
if (nlines < maxlines) {
tmpstr = curses_break_str(linestarts[nlines - 1],
width - 1, 1);
mx = (int) strlen(tmpstr) + border_space;
mvwprintw(win, my, mx, "%*c", maxx - mx + 1, ' ');
if (++my > maxy) {
scroll_window(MESSAGE_WIN);
my--;
}
mx = border_space;
linestarts[nlines] = linestarts[nlines - 1]
+ (int) strlen(tmpstr);
if (*linestarts[nlines] == ' ')
linestarts[nlines]++;
mvwaddstr(win, my, mx, linestarts[nlines]);
mx = (int) strlen(linestarts[nlines]) + border_space;
nlines++;
free(tmpstr);
} else {
p_answer[--len] = '\0';
mvwaddch(win, my, --mx, ' ');
}
}
wmove(win, my, mx);
curs_set(1);
wrefresh(win);
#ifdef PDCURSES
ch = wgetch(win);
#else
ch = getch();
#endif
#if 0 /* [erase_char (delete one character) and kill_char (delete all
* characters) are from tty and not currently set up for curses] */
if (ch == erase_char) {
ch = '\177'; /* match switch-case below */
/* honor kill_char if it's ^U or similar, but not if it's '@' */
} else if (ch == kill_char && (ch < ' ' || ch >= '\177')) { /*ASCII*/
if (len == 0) /* nothing to kill; just start over */
continue;
ch = '\033'; /* get rid of all current input, then start over */
}
#endif
curs_set(0);
switch (ch) {
case '\033': /* DOESCAPE */
/* if there isn't any input yet, return ESC */
if (len == 0) {
Strcpy(answer, "\033");
return;
}
/* otherwise, discard current input and start over;
first need to blank it from the screen */
while (nlines - 1 > promptline) {
if (nlines-- > height) {
unscroll_window(MESSAGE_WIN);
tmpstr = curses_break_str(linestarts[nlines - height],
width - 1, 1);
mvwaddstr(win, border_space, border_space, tmpstr);
free(tmpstr);
} else {
mx = border_space;
mvwprintw(win, my, mx, "%*c", maxx - mx, ' ');
my--;
}
}
mx = promptx;
mvwprintw(win, my, mx, "%*c", maxx - mx, ' ');
*p_answer = '\0';
len = 0;
break;
case ERR: /* should not happen */
*answer = '\0';
free(tmpbuf);
free(linestarts);
curs_set(orig_cursor);
curses_toggle_color_attr(win, NONE, A_BOLD, OFF);
return;
case '\r':
case '\n':
free(linestarts);
(void) strncpy(answer, p_answer, buffer);
answer[buffer - 1] = '\0';
Strcpy(toplines, tmpbuf);
mesg_add_line((char *) tmpbuf);
free(tmpbuf);
curs_set(orig_cursor);
curses_toggle_color_attr(win, NONE, A_BOLD, OFF);
if (++my > maxy) {
scroll_window(MESSAGE_WIN);
my--;
}
mx = border_space;
return;
case '\177': /* DEL/Rubout */
case KEY_DC: /* delete-character */
case '\b': /* ^H (Backspace: '\011') */
case KEY_BACKSPACE:
if (len < 1) {
len = 1;
mx = promptx;
}
p_answer[--len] = '\0';
mvwaddch(win, my, --mx, ' ');
/* try to unwrap back to the previous line if there is one */
if (nlines > 1 && (int) strlen(linestarts[nlines - 2]) < width) {
mvwaddstr(win, my - 1, border_space, linestarts[nlines - 2]);
if (nlines-- > height) {
unscroll_window(MESSAGE_WIN);
tmpstr = curses_break_str(linestarts[nlines - height],
width - 1, 1);
mvwaddstr(win, border_space, border_space, tmpstr);
free(tmpstr);
} else {
/* clean up the leftovers on the next line,
if we didn't scroll it away */
mvwprintw(win, my--, border_space, "%*c",
(int) strlen(linestarts[nlines]), ' ');
}
}
break;
default:
p_answer[len++] = ch;
if (len >= buffer)
len = buffer - 1;
else
mvwaddch(win, my, mx, ch);
p_answer[len] = '\0';
}
}
}
/* Scroll lines upward in given window, or clear window if only one line. */
static void
scroll_window(winid wid)
{
directional_scroll(wid, 1);
}
static void
unscroll_window(winid wid)
{
directional_scroll(wid, -1);
}
static void
directional_scroll(winid wid, int nlines)
{
int wh, ww, s_top, s_bottom;
boolean border = curses_window_has_border(wid);
WINDOW *win = curses_get_nhwin(wid);
curses_get_window_size(wid, &wh, &ww);
if (wh == 1) {
curses_clear_nhwin(wid);
return;
}
if (border) {
s_top = 1;
s_bottom = wh;
} else {
s_top = 0;
s_bottom = wh - 1;
}
scrollok(win, TRUE);
wsetscrreg(win, s_top, s_bottom);
wscrl(win, nlines);
scrollok(win, FALSE);
if (wid == MESSAGE_WIN) {
if (border)
mx = 1;
else
mx = 0;
}
if (border) {
box(win, 0, 0);
}
wrefresh(win);
}
/* Add given line to message history */
static void
mesg_add_line(char *mline)
{
nhprev_mesg *tmp_mesg = NULL;
nhprev_mesg *current_mesg = (nhprev_mesg *) alloc((unsigned)
(sizeof (nhprev_mesg)));
current_mesg->str = curses_copy_of(mline);
current_mesg->turn = moves;
current_mesg->next_mesg = NULL;
if (num_messages == 0) {
first_mesg = current_mesg;
}
if (last_mesg != NULL) {
last_mesg->next_mesg = current_mesg;
}
current_mesg->prev_mesg = last_mesg;
last_mesg = current_mesg;
if (num_messages < max_messages) {
num_messages++;
} else {
tmp_mesg = first_mesg->next_mesg;
free(first_mesg);
first_mesg = tmp_mesg;
}
}
/* Returns specified line from message history, or NULL if out of bounds */
static nhprev_mesg *
get_msg_line(boolean reverse, int mindex)
{
int count;
nhprev_mesg *current_mesg;
if (reverse) {
current_mesg = last_mesg;
for (count = 0; count < mindex; count++) {
if (current_mesg == NULL) {
return NULL;
}
current_mesg = current_mesg->prev_mesg;
}
return current_mesg;
} else {
current_mesg = first_mesg;
for (count = 0; count < mindex; count++) {
if (current_mesg == NULL) {
return NULL;
}
current_mesg = current_mesg->next_mesg;
}
return current_mesg;
}
}
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