+/****************************************************************************
+ * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. *
+ * *
+ * Permission is hereby granted, free of charge, to any person obtaining a *
+ * copy of this software and associated documentation files (the *
+ * "Software"), to deal in the Software without restriction, including *
+ * without limitation the rights to use, copy, modify, merge, publish, *
+ * distribute, distribute with modifications, sublicense, and/or sell *
+ * copies of the Software, and to permit persons to whom the Software is *
+ * furnished to do so, subject to the following conditions: *
+ * *
+ * The above copyright notice and this permission notice shall be included *
+ * in all copies or substantial portions of the Software. *
+ * *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
+ * *
+ * Except as contained in this notice, the name(s) of the above copyright *
+ * holders shall not be used in advertising or otherwise to promote the *
+ * sale, use or other dealings in this Software without prior written *
+ * authorization. *
+ ****************************************************************************/
/*
* view.c -- a silly little viewer program
*
* to test the scrolling code in ncurses.
*
* modified by Thomas Dickey <dickey@clark.net> July 1995 to demonstrate
- * the use of 'resizeterm()'.
+ * the use of 'resizeterm()', and May 2000 to illustrate wide-character
+ * handling.
*
- * Takes a filename argument. It's a simple file-viewer with various
+ * Takes a filename argument. It's a simple file-viewer with various
* scroll-up and scroll-down commands.
*
* n -- scroll one line forward
* scroll operation worked, and the refresh() code only had to do a
* partial repaint.
*
- * $Id: view.c,v 1.20 1997/04/26 18:16:38 tom Exp $
+ * $Id: view.c,v 1.69 2008/09/06 22:10:50 tom Exp $
*/
#include <test.priv.h>
-#include <string.h>
-#include <ctype.h>
-#include <signal.h>
+#include <time.h>
+
+#undef CTRL /* conflict on AIX 5.2 with <sys/ioctl.h> */
#if HAVE_TERMIOS_H
# include <termios.h>
# endif
#endif
+#define my_pair 1
+
/* This is needed to compile 'struct winsize' */
-#if SYSTEM_LOOKS_LIKE_SCO
+#if NEED_PTEM_H
#include <sys/stream.h>
#include <sys/ptem.h>
#endif
-
-#define MAXLINES 256 /* most lines we can handle */
-static void finish(int sig) GCC_NORETURN;
-static void show_all(void);
-
-#if defined(SIGWINCH) && defined(TIOCGWINSZ) && defined(NCURSES_VERSION)
+#if USE_WIDEC_SUPPORT
+#if HAVE_MBTOWC && HAVE_MBLEN
+#define reset_mbytes(state) mblen(NULL, 0), mbtowc(NULL, NULL, 0)
+#define count_mbytes(buffer,length,state) mblen(buffer,length)
+#define check_mbytes(wch,buffer,length,state) \
+ (int) mbtowc(&wch, buffer, length)
+#define state_unused
+#elif HAVE_MBRTOWC && HAVE_MBRLEN
+#define reset_mbytes(state) init_mb(state)
+#define count_mbytes(buffer,length,state) mbrlen(buffer,length,&state)
+#define check_mbytes(wch,buffer,length,state) \
+ (int) mbrtowc(&wch, buffer, length, &state)
+#else
+make an error
+#endif
+#endif /* USE_WIDEC_SUPPORT */
+
+static RETSIGTYPE finish(int sig) GCC_NORETURN;
+static void show_all(const char *tag);
+
+#if defined(SIGWINCH) && defined(TIOCGWINSZ) && HAVE_RESIZE_TERM
#define CAN_RESIZE 1
#else
#define CAN_RESIZE 0
#if CAN_RESIZE
static RETSIGTYPE adjust(int sig);
-static int interrupted;
+static int interrupted;
#endif
-static int waiting;
-static int shift;
+static bool waiting = FALSE;
+static int shift = 0;
+static bool try_color = FALSE;
-static char *fname;
-static char *lines[MAXLINES];
-static char **lptr;
+static char *fname;
+static NCURSES_CH_T **vec_lines;
+static NCURSES_CH_T **lptr;
+static int num_lines;
-#if !HAVE_STRDUP
-static char *strdup (char *s)
+static void
+usage(void)
{
- char *p;
-
- p = malloc(strlen(s)+1);
- if (p)
- strcpy(p,s);
- return(p);
+ static const char *msg[] =
+ {
+ "Usage: view [options] file"
+ ,""
+ ,"Options:"
+ ," -c use color if terminal supports it"
+ ," -i ignore INT, QUIT, TERM signals"
+ ," -n NUM specify maximum number of lines (default 1000)"
+#if defined(KEY_RESIZE)
+ ," -r use old-style sigwinch handler rather than KEY_RESIZE"
+#endif
+#ifdef TRACE
+ ," -t trace screen updates"
+ ," -T NUM specify trace mask"
+#endif
+ };
+ size_t n;
+ for (n = 0; n < SIZEOF(msg); n++)
+ fprintf(stderr, "%s\n", msg[n]);
+ ExitProgram(EXIT_FAILURE);
}
-#endif /* not HAVE_STRDUP */
-int main(int argc, char *argv[])
+static int
+ch_len(NCURSES_CH_T * src)
{
-FILE *fp;
-char buf[BUFSIZ];
-int i;
-char **olptr;
-int done = FALSE;
+ int result = 0;
+#if USE_WIDEC_SUPPORT
+#endif
-#ifdef TRACE
- trace(TRACE_UPDATE);
+#if USE_WIDEC_SUPPORT
+ while (getcchar(src++, NULL, NULL, NULL, NULL) > 0)
+ result++;
+#else
+ while (*src++)
+ result++;
#endif
+ return result;
+}
- if (argc != 2) {
- fprintf(stderr, "usage: view file\n");
- return EXIT_FAILURE;
- } else {
- fname = argv[1];
- if ((fp = fopen(fname, "r")) == (FILE *)NULL) {
- perror(fname);
- return EXIT_FAILURE;
+/*
+ * Allocate a string into an array of chtype's. If UTF-8 mode is
+ * active, translate the string accordingly.
+ */
+static NCURSES_CH_T *
+ch_dup(char *src)
+{
+ unsigned len = strlen(src);
+ NCURSES_CH_T *dst = typeMalloc(NCURSES_CH_T, len + 1);
+ unsigned j, k;
+#if USE_WIDEC_SUPPORT
+ wchar_t wstr[CCHARW_MAX + 1];
+ wchar_t wch;
+ int l = 0;
+ size_t rc;
+ int width;
+#ifndef state_unused
+ mbstate_t state;
+#endif
+#endif /* USE_WIDEC_SUPPORT */
+
+#if USE_WIDEC_SUPPORT
+ reset_mbytes(state);
+#endif
+ for (j = k = 0; j < len; j++) {
+#if USE_WIDEC_SUPPORT
+ rc = check_mbytes(wch, src + j, len - j, state);
+ if (rc == (size_t) -1 || rc == (size_t) -2)
+ break;
+ j += rc - 1;
+ if ((width = wcwidth(wch)) < 0)
+ break;
+ if ((width > 0 && l > 0) || l == CCHARW_MAX) {
+ wstr[l] = L'\0';
+ l = 0;
+ if (setcchar(dst + k, wstr, 0, 0, NULL) != OK)
+ break;
+ ++k;
}
+ if (width == 0 && l == 0)
+ wstr[l++] = L' ';
+ wstr[l++] = wch;
+#else
+ dst[k++] = src[j];
+#endif
}
+#if USE_WIDEC_SUPPORT
+ if (l > 0) {
+ wstr[l] = L'\0';
+ if (setcchar(dst + k, wstr, 0, 0, NULL) == OK)
+ ++k;
+ }
+ wstr[0] = L'\0';
+ setcchar(dst + k, wstr, 0, 0, NULL);
+#else
+ dst[k] = 0;
+#endif
+ return dst;
+}
- (void) signal(SIGINT, finish); /* arrange interrupts to terminate */
+int
+main(int argc, char *argv[])
+{
+ int MAXLINES = 1000;
+ FILE *fp;
+ char buf[BUFSIZ];
+ int i;
+ int my_delay = 0;
+ NCURSES_CH_T **olptr;
+ int value = 0;
+ bool done = FALSE;
+ bool got_number = FALSE;
#if CAN_RESIZE
- (void) signal(SIGWINCH, adjust); /* arrange interrupts to resize */
+ bool nonposix_resize = FALSE;
#endif
+ const char *my_label = "Input";
+
+ setlocale(LC_ALL, "");
- (void) initscr(); /* initialize the curses library */
- keypad(stdscr, TRUE); /* enable keyboard mapping */
- (void) nonl(); /* tell curses not to do NL->CR/NL on output */
- (void) cbreak(); /* take input chars one at a time, no wait for \n */
- (void) noecho(); /* don't echo input */
- idlok(stdscr, TRUE); /* allow use of insert/delete line */
+#ifndef NCURSES_VERSION
+ /*
+ * We know ncurses will catch SIGINT if we don't establish our own handler.
+ * Other versions of curses may/may not catch it.
+ */
+ (void) signal(SIGINT, finish); /* arrange interrupts to terminate */
+#endif
+
+ while ((i = getopt(argc, argv, "cin:rtT:")) != -1) {
+ switch (i) {
+ case 'c':
+ try_color = TRUE;
+ break;
+ case 'i':
+ CATCHALL(SIG_IGN);
+ break;
+ case 'n':
+ if ((MAXLINES = atoi(optarg)) < 1 ||
+ (MAXLINES + 2) <= 1)
+ usage();
+ break;
+#if CAN_RESIZE
+ case 'r':
+ nonposix_resize = TRUE;
+ break;
+#endif
+#ifdef TRACE
+ case 'T':
+ trace((unsigned) atoi(optarg));
+ break;
+ case 't':
+ trace(TRACE_CALLS);
+ break;
+#endif
+ default:
+ usage();
+ }
+ }
+ if (optind + 1 != argc)
+ usage();
+
+ if ((vec_lines = typeMalloc(NCURSES_CH_T *, MAXLINES + 2)) == 0)
+ usage();
+
+ fname = argv[optind];
+ if ((fp = fopen(fname, "r")) == 0) {
+ perror(fname);
+ ExitProgram(EXIT_FAILURE);
+ }
+#if CAN_RESIZE
+ if (nonposix_resize)
+ (void) signal(SIGWINCH, adjust); /* arrange interrupts to resize */
+#endif
/* slurp the file */
- for (lptr = &lines[0]; fgets(buf, BUFSIZ, fp) != (char *)NULL; lptr++) {
+ for (lptr = &vec_lines[0]; (lptr - vec_lines) < MAXLINES; lptr++) {
char temp[BUFSIZ], *s, *d;
- int col;
+ int col;
- if (lptr - lines >= MAXLINES) {
- endwin();
- (void) fprintf(stderr, "%s: %s is too large\n", argv[0], argv[1]);
- return EXIT_FAILURE;
- }
+ if (fgets(buf, sizeof(buf), fp) == 0)
+ break;
/* convert tabs so that shift will work properly */
for (s = buf, d = temp, col = 0; (*d = *s) != '\0'; s++) {
break;
} else if (*d == '\t') {
col = (col | 7) + 1;
- while ((d-temp) != col)
+ while ((d - temp) != col)
*d++ = ' ';
- } else if (isprint(*d)) {
+ } else
+#if USE_WIDEC_SUPPORT
+ col++, d++;
+#else
+ if (isprint(UChar(*d))) {
col++;
d++;
} else {
- sprintf(d, "\\%03o", *s);
+ sprintf(d, "\\%03o", UChar(*s));
d += strlen(d);
col = (d - temp);
}
+#endif
}
- *lptr = strdup(temp);
+ *lptr = ch_dup(temp);
}
(void) fclose(fp);
+ num_lines = lptr - vec_lines;
+
+ (void) initscr(); /* initialize the curses library */
+ keypad(stdscr, TRUE); /* enable keyboard mapping */
+ (void) nonl(); /* tell curses not to do NL->CR/NL on output */
+ (void) cbreak(); /* take input chars one at a time, no wait for \n */
+ (void) noecho(); /* don't echo input */
+ nodelay(stdscr, TRUE);
+ idlok(stdscr, TRUE); /* allow use of insert/delete line */
+
+ if (try_color) {
+ if (has_colors()) {
+ start_color();
+ init_pair(my_pair, COLOR_WHITE, COLOR_BLUE);
+ bkgd(COLOR_PAIR(my_pair));
+ } else {
+ try_color = FALSE;
+ }
+ }
- lptr = lines;
+ lptr = vec_lines;
while (!done) {
- int n, c;
- bool explicit;
+ int n, c;
- show_all();
+ if (!got_number)
+ show_all(my_label);
- explicit = FALSE;
n = 0;
- for (;;) {
+ for (;;) {
#if CAN_RESIZE
- if (interrupted)
+ if (interrupted) {
adjust(0);
+ my_label = "interrupt";
+ }
#endif
waiting = TRUE;
c = getch();
waiting = FALSE;
- if (c < 127 && isdigit(c)) {
- n = 10 * n + (c - '0');
- explicit = TRUE;
+ if ((c < 127) && isdigit(c)) {
+ if (!got_number) {
+ mvprintw(0, 0, "Count: ");
+ clrtoeol();
+ }
+ addch(UChar(c));
+ value = 10 * value + (c - '0');
+ got_number = TRUE;
} else
break;
}
- if (!explicit && n == 0)
+ if (got_number && value) {
+ n = value;
+ } else {
n = 1;
+ }
- switch(c) {
- case KEY_DOWN:
+ if (c != ERR)
+ my_label = keyname(c);
+ switch (c) {
+ case KEY_DOWN:
case 'n':
olptr = lptr;
- for (i = 0; i < n; i++)
- if (lptr + LINES < lines + MAXLINES && lptr[LINES + 1])
+ for (i = 0; i < n; i++)
+ if ((lptr - vec_lines) < (num_lines - LINES + 1))
lptr++;
- else
+ else
break;
- wscrl(stdscr, lptr - olptr);
- break;
+ scrl(lptr - olptr);
+ break;
- case KEY_UP:
+ case KEY_UP:
case 'p':
olptr = lptr;
- for (i = 0; i < n; i++)
- if (lptr > lines)
+ for (i = 0; i < n; i++)
+ if (lptr > vec_lines)
lptr--;
- else
+ else
break;
- wscrl(stdscr, lptr - olptr);
- break;
+ scrl(lptr - olptr);
+ break;
case 'h':
case KEY_HOME:
- lptr = lines;
+ lptr = vec_lines;
+ break;
+
+ case 'e':
+ case KEY_END:
+ if (num_lines > LINES)
+ lptr = vec_lines + num_lines - LINES + 1;
+ else
+ lptr = vec_lines;
break;
case 'r':
case KEY_RIGHT:
- shift++;
+ shift += n;
break;
case 'l':
case KEY_LEFT:
- if (shift)
- shift--;
- else
+ shift -= n;
+ if (shift < 0) {
+ shift = 0;
beep();
+ }
break;
case 'q':
done = TRUE;
break;
+#ifdef KEY_RESIZE
+ case KEY_RESIZE: /* ignore this; ncurses will repaint */
+ break;
+#endif
+ case 's':
+ if (got_number) {
+ halfdelay(my_delay = n);
+ } else {
+ nodelay(stdscr, FALSE);
+ my_delay = -1;
+ }
+ break;
+ case ' ':
+ nodelay(stdscr, TRUE);
+ my_delay = 0;
+ break;
+ case ERR:
+ if (!my_delay)
+ napms(50);
+ break;
default:
beep();
+ break;
+ }
+ if (c >= KEY_MIN || (c > 0 && !isdigit(c))) {
+ got_number = FALSE;
+ value = 0;
}
}
- finish(0); /* we're done */
+ finish(0); /* we're done */
}
-static RETSIGTYPE finish(int sig)
+static RETSIGTYPE
+finish(int sig)
{
endwin();
- exit(sig != 0 ? EXIT_FAILURE : EXIT_SUCCESS);
+#if NO_LEAKS
+ if (vec_lines != 0) {
+ int n;
+ for (n = 0; n < num_lines; ++n) {
+ free(vec_lines[n]);
+ }
+ free(vec_lines);
+ }
+#endif
+ ExitProgram(sig != 0 ? EXIT_FAILURE : EXIT_SUCCESS);
}
#if CAN_RESIZE
/*
* This uses functions that are "unsafe", but it seems to work on SunOS and
- * Linux. The 'wrefresh(curscr)' is needed to force the refresh to start from
- * the top of the screen -- some xterms mangle the bitmap while resizing.
+ * Linux. Usually: the "unsafe" refers to the functions that POSIX lists
+ * which may be called from a signal handler. Those do not include buffered
+ * I/O, which is used for instance in wrefresh(). To be really portable, you
+ * should use the KEY_RESIZE return (which relies on ncurses' sigwinch
+ * handler).
+ *
+ * The 'wrefresh(curscr)' is needed to force the refresh to start from the top
+ * of the screen -- some xterms mangle the bitmap while resizing.
*/
-static RETSIGTYPE adjust(int sig)
+static RETSIGTYPE
+adjust(int sig)
{
- if (waiting || sig == 0) {
+ if (waiting || sig == 0) {
struct winsize size;
- if (ioctl(fileno(stdout), TIOCGWINSZ, &size) == 0) {
- resizeterm(size.ws_row, size.ws_col);
- beep();
- wrefresh(curscr); /* Linux needs this */
- show_all();
- }
- interrupted = FALSE;
- } else {
- interrupted = TRUE;
+ if (ioctl(fileno(stdout), TIOCGWINSZ, &size) == 0) {
+ resize_term(size.ws_row, size.ws_col);
+ wrefresh(curscr); /* Linux needs this */
+ show_all(sig ? "SIGWINCH" : "interrupt");
}
- (void) signal(SIGWINCH, adjust); /* some systems need this */
+ interrupted = FALSE;
+ } else {
+ interrupted = TRUE;
+ }
+ (void) signal(SIGWINCH, adjust); /* some systems need this */
}
-#endif /* CAN_RESIZE */
+#endif /* CAN_RESIZE */
-static void show_all(void)
+static void
+show_all(const char *tag)
{
- int i;
- char temp[BUFSIZ];
- char *s;
+ int i;
+ char temp[BUFSIZ];
+ NCURSES_CH_T *s;
+ time_t this_time;
#if CAN_RESIZE
- sprintf(temp, "(%3dx%3d) col %d ", LINES, COLS, shift);
- i = strlen(temp);
- sprintf(temp+i, "view %.*s", (int)(sizeof(temp)-7-i), fname);
+ sprintf(temp, "%.20s (%3dx%3d) col %d ", tag, LINES, COLS, shift);
+ i = strlen(temp);
+ if ((i + 7) < (int) sizeof(temp))
+ sprintf(temp + i, "view %.*s", (int) (sizeof(temp) - 7 - i), fname);
#else
- sprintf(temp, "view %.*s", (int)sizeof(temp)-7, fname);
+ (void) tag;
+ sprintf(temp, "view %.*s", (int) sizeof(temp) - 7, fname);
#endif
- move(0,0);
- printw("%.*s", COLS, temp);
- clrtoeol();
+ move(0, 0);
+ printw("%.*s", COLS, temp);
+ clrtoeol();
+ this_time = time((time_t *) 0);
+ strcpy(temp, ctime(&this_time));
+ if ((i = strlen(temp)) != 0) {
+ temp[--i] = 0;
+ if (move(0, COLS - i - 2) != ERR)
+ printw(" %s", temp);
+ }
- scrollok(stdscr, FALSE); /* prevent screen from moving */
- for (i = 1; i < LINES; i++) {
- move(i, 0);
- if ((s = lptr[i-1]) != 0 && (int)strlen(s) > shift)
- printw("%3d:%.*s", lptr+i-lines, COLS-4, s + shift);
- else
- printw("%3d:", lptr+i-lines);
- clrtoeol();
- }
- setscrreg(1, LINES-1);
- scrollok(stdscr, TRUE);
- refresh();
+ scrollok(stdscr, FALSE); /* prevent screen from moving */
+ for (i = 1; i < LINES; i++) {
+ move(i, 0);
+ printw("%3ld:", (long) (lptr + i - vec_lines));
+ clrtoeol();
+ if ((s = lptr[i - 1]) != 0) {
+ int len = ch_len(s);
+ if (len > shift) {
+#if USE_WIDEC_SUPPORT
+ add_wchstr(s + shift);
+#else
+ addchstr(s + shift);
+#endif
+ }
+#if defined(NCURSES_VERSION) || defined(HAVE_WCHGAT)
+ if (try_color)
+ wchgat(stdscr, -1, A_NORMAL, my_pair, NULL);
+#endif
+ }
+ }
+ setscrreg(1, LINES - 1);
+ scrollok(stdscr, TRUE);
+ refresh();
}
-
-/* view.c ends here */
-
projects / ncurses.git / blobdiff