/****************************************************************************
- * Copyright (c) 1998-2012,2013 Free Software Foundation, Inc. *
+ * Copyright (c) 1998-2016,2017 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 *
*
* modified by Thomas Dickey <dickey@clark.net> July 1995 to demonstrate
* the use of 'resizeterm()', and May 2000 to illustrate wide-character
- * handling.
+ * handling. This program intentionally does not use pads, to allow testing
+ * with less-capable implementations of curses.
*
* Takes a filename argument. It's a simple file-viewer with various
* scroll-up and scroll-down commands.
* scroll operation worked, and the refresh() code only had to do a
* partial repaint.
*
- * $Id: view.c,v 1.90 2013/01/05 23:18:13 tom Exp $
+ * $Id: view.c,v 1.135 2017/10/23 09:18:01 tom Exp $
*/
#include <test.priv.h>
#include <widechars.h>
+#include <popup_msg.h>
+#include <sys/stat.h>
#include <time.h>
-#undef CTRL /* conflict on AIX 5.2 with <sys/ioctl.h> */
-
-#if HAVE_TERMIOS_H
-# include <termios.h>
-#else
-#if !defined(__MINGW32__)
-# include <sgtty.h>
-#endif
-#endif
-
-#if !defined(sun) || !HAVE_TERMIOS_H
-# if HAVE_SYS_IOCTL_H
-# include <sys/ioctl.h>
-# endif
-#endif
+static void finish(int sig) GCC_NORETURN;
#define my_pair 1
-/* This is needed to compile 'struct winsize' */
-#if NEED_PTEM_H
-#include <sys/stream.h>
-#include <sys/ptem.h>
-#endif
-
-#undef CTRL
-#define CTRL(x) ((x) & 0x1f)
-
-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
-#endif
-
-#if CAN_RESIZE
-static RETSIGTYPE adjust(int sig);
-static int interrupted;
-static bool waiting = FALSE;
-#endif
-
static int shift = 0;
static bool try_color = FALSE;
static NCURSES_CH_T **lptr;
static int num_lines;
+#if USE_WIDEC_SUPPORT
+static bool n_option = FALSE;
+#endif
+
static void usage(void) GCC_NORETURN;
static void
-usage(void)
+failed(const char *msg)
{
- 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
- ," -s start in single-step mode, waiting for input"
-#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]);
+ endwin();
+ fprintf(stderr, "%s\n", msg);
ExitProgram(EXIT_FAILURE);
}
#if USE_WIDEC_SUPPORT
for (;;) {
TEST_CCHAR(src, count, {
- ++result;
+ int len = wcwidth(test_wch[0]);
+ result += (len > 0) ? len : 1;
++src;
}
, {
return result;
}
-/*
- * 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)
+static void
+finish(int sig)
{
- unsigned len = (unsigned) strlen(src);
- NCURSES_CH_T *dst = typeMalloc(NCURSES_CH_T, len + 1);
- size_t j, k;
+ endwin();
+#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);
+}
+
+static void
+show_all(const char *tag)
+{
+ int i;
+ int digits;
+ char temp[BUFSIZ];
+ NCURSES_CH_T *s;
+ time_t this_time;
+
+ for (digits = 1, i = num_lines; i > 0; i /= 10) {
+ ++digits;
+ }
+
+ _nc_SPRINTF(temp, _nc_SLIMIT(sizeof(temp))
+ "view %.*s", (int) strlen(tag), tag);
+ i = (int) strlen(temp);
+ _nc_SPRINTF(temp + i, _nc_SLIMIT(sizeof(temp) - i)
+ " %.*s", (int) sizeof(temp) - i - 2, fname);
+ move(0, 0);
+ printw("%.*s", COLS, temp);
+ clrtoeol();
+ this_time = time((time_t *) 0);
+ _nc_STRNCPY(temp, ctime(&this_time), (size_t) 30);
+ if ((i = (int) 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++) {
+ int len;
+ int actual = (int) (lptr + i - vec_lines);
+ if (actual > num_lines) {
+ if (i < LINES - 1) {
+ int y, x;
+ getyx(stdscr, y, x);
+ move(i, 0);
+ clrtobot();
+ move(y, x);
+ }
+ break;
+ }
+ move(i, 0);
+ printw("%*d:", digits, actual);
+ clrtoeol();
+ if ((s = lptr[i - 1]) == 0) {
+ continue;
+ }
+ len = ch_len(s);
+ if (len > shift) {
#if USE_WIDEC_SUPPORT
- wchar_t wstr[CCHARW_MAX + 1];
- wchar_t wch;
- int l = 0;
- size_t rc;
+ /*
+ * An index into an array of cchar_t's is not necessarily the same
+ * as the column-offset. A pad would do this directly. Here we
+ * must translate (or compute a table of offsets).
+ */
+ {
+ int j;
+ int width = 1, count;
+ for (j = actual = 0; j < shift; ++j) {
+ TEST_CCHAR(s + j, count, {
+ width = wcwidth(test_wch[0]);
+ }
+ , {
+ width = 1;
+ });
+ actual += width;
+ if (actual > shift) {
+ break;
+ } else if (actual == shift) {
+ ++j;
+ break;
+ }
+ }
+ if (actual < len) {
+ if (actual > shift)
+ addch('<');
+ add_wchstr(s + j + (actual > shift));
+ }
+ }
+#else
+ addchstr(s + shift);
+#endif
+ }
+#if defined(NCURSES_VERSION) || defined(HAVE_WCHGAT)
+ if (try_color)
+ wchgat(stdscr, -1, WA_NORMAL, my_pair, NULL);
+#endif
+ }
+ setscrreg(1, LINES - 1);
+ scrollok(stdscr, TRUE);
+ refresh();
+}
+
+static void
+read_file(const char *filename)
+{
+ FILE *fp;
+ int pass;
+ int k;
int width;
+ size_t j;
+ size_t len;
+ struct stat sb;
+ char *my_blob;
+ char **my_vec = 0;
+ WINDOW *my_win;
+
+ if (stat(filename, &sb) != 0
+ || (sb.st_mode & S_IFMT) != S_IFREG) {
+ failed("input is not a file");
+ }
+
+ if (sb.st_size == 0) {
+ failed("input is empty");
+ }
+
+ if ((fp = fopen(filename, "r")) == 0) {
+ failed("cannot open input-file");
+ }
+
+ if ((my_blob = malloc((size_t) sb.st_size + 1)) == 0) {
+ failed("cannot allocate memory for input-file");
+ }
+
+ len = fread(my_blob, sizeof(char), (size_t) sb.st_size, fp);
+ my_blob[sb.st_size] = '\0';
+ fclose(fp);
+
+ for (pass = 0; pass < 2; ++pass) {
+ char *base = my_blob;
+ k = 0;
+ for (j = 0; j < len; ++j) {
+ if (my_blob[j] == '\n') {
+ if (pass) {
+ my_vec[k] = base;
+ my_blob[j] = '\0';
+ }
+ base = my_blob + j + 1;
+ ++k;
+ }
+ }
+ num_lines = k;
+ if (base != (my_blob + j))
+ ++num_lines;
+ if (!pass &&
+ ((my_vec = typeCalloc(char *, (size_t) k + 2)) == 0)) {
+ failed("cannot allocate line-vector #1");
+ }
+ }
+
+#if USE_WIDEC_SUPPORT
+ if (!memcmp("\357\273\277", my_blob, 3)) {
+ char *s = my_blob + 3;
+ char *d = my_blob;
+ Trace(("trim BOM"));
+ do {
+ } while ((*d++ = *s++) != '\0');
+ }
+#endif
+
+ width = (int) strlen(my_vec[0]);
+ for (k = 1; my_vec[k]; ++k) {
+ int check = (int) (my_vec[k] - my_vec[k - 1]);
+ if (width < check)
+ width = check;
+ }
+ width = (width + 1) * 5;
+ my_win = newwin(2, width, 0, 0);
+ if (my_win == 0)
+ failed("cannot allocate temporary window");
+
+ if ((vec_lines = typeCalloc(NCURSES_CH_T *, (size_t) num_lines + 2)) == 0)
+ failed("cannot allocate line-vector #2");
+
+ /*
+ * Use the curses library for rendering, including tab-conversion. This
+ * will not make the resulting array's indices correspond to column for
+ * lines containing double-width cells because the "in_wch" functions will
+ * ignore the skipped cells. Use pads for that sort of thing.
+ */
+ Trace(("slurp the file"));
+ for (k = 0; my_vec[k]; ++k) {
+ char *s;
+ int y, x;
+#if USE_WIDEC_SUPPORT
+ char *last = my_vec[k] + (int) strlen(my_vec[k]);
+ wchar_t wch[2];
+ size_t rc;
#ifndef state_unused
- mbstate_t state;
+ mbstate_t state;
#endif
#endif /* USE_WIDEC_SUPPORT */
+ werase(my_win);
+ wmove(my_win, 0, 0);
#if USE_WIDEC_SUPPORT
- reset_mbytes(state);
+ wch[1] = 0;
+ reset_mbytes(state);
#endif
- for (j = k = 0; j < len; j++) {
+ for (s = my_vec[k]; *s != '\0'; ++s) {
#if USE_WIDEC_SUPPORT
- rc = (size_t) 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 (!n_option) {
+ rc = (size_t) check_mbytes(wch[0], s, (size_t) (last - s), state);
+ if ((long) rc == -1 || (long) rc == -2) {
+ break;
+ }
+ s += rc - 1;
+ waddwstr(my_win, wch);
+ } else
+#endif
+ waddch(my_win, *s & 0xff);
}
- if (width == 0 && l == 0)
- wstr[l++] = L' ';
- wstr[l++] = wch;
+ getyx(my_win, y, x);
+ if (y)
+ x = width - 1;
+ wmove(my_win, 0, 0);
+ /* "x + 1" works with standard curses; some implementations are buggy */
+ if ((vec_lines[k] = typeCalloc(NCURSES_CH_T, x + width + 1)) == 0)
+ failed("cannot allocate line-vector #3");
+#if USE_WIDEC_SUPPORT
+ win_wchnstr(my_win, vec_lines[k], x);
#else
- dst[k++] = (chtype) UChar(src[j]);
+ winchnstr(my_win, vec_lines[k], x);
#endif
}
+
+ delwin(my_win);
+ free(my_vec);
+ free(my_blob);
+}
+
+static void
+usage(void)
+{
+ static const char *msg[] =
+ {
+ "Usage: view [options] file"
+ ,""
+ ,"Options:"
+ ," -c use color if terminal supports it"
+ ," -i ignore INT, QUIT, TERM signals"
#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;
+ ," -n use waddch (bytes) rather then wadd_wch (wide-chars)"
+#endif
+ ," -s start in single-step mode, waiting for input"
+#ifdef TRACE
+ ," -t trace screen updates"
+ ," -T NUM specify trace mask"
#endif
- return dst;
+ };
+ size_t n;
+ for (n = 0; n < SIZEOF(msg); n++)
+ fprintf(stderr, "%s\n", msg[n]);
+ ExitProgram(EXIT_FAILURE);
}
int
main(int argc, char *argv[])
{
- int MAXLINES = 1000;
- FILE *fp;
- char buf[BUFSIZ];
+ static const char *help[] =
+ {
+ "Commands:",
+ " q,^Q,ESC - quit this program",
+ "",
+ " p,<Up> - scroll the viewport up by one row",
+ " n,<Down> - scroll the viewport down by one row",
+ " l,<Left> - scroll the viewport left by one column",
+ " r,<Right> - scroll the viewport right by one column",
+ " <,> - scroll the viewport left/right by 8 columns",
+ "",
+ " h,<Home> - scroll the viewport to top of file",
+ " ^F,<PageDn> - scroll to the next page",
+ " ^B,<PageUp> - scroll to the previous page",
+ " e,<End> - scroll the viewport to end of file",
+ "",
+ " ^L - repaint using redrawwin()",
+ "",
+ " 0 through 9 - enter digits for count",
+ " s - use entered count for halfdelay() parameter",
+ " - if no entered count, stop nodelay()",
+ " <space> - begin nodelay()",
+ 0
+ };
+
int i;
int my_delay = 0;
NCURSES_CH_T **olptr;
int value = 0;
bool done = FALSE;
bool got_number = FALSE;
- bool single_step = TRUE;
-#if CAN_RESIZE
- bool nonposix_resize = FALSE;
-#endif
+ bool ignore_sigs = FALSE;
+ bool single_step = FALSE;
const char *my_label = "Input";
setlocale(LC_ALL, "");
-#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:rstT:")) != -1) {
+ while ((i = getopt(argc, argv, "cinstT:")) != -1) {
switch (i) {
case 'c':
try_color = TRUE;
break;
case 'i':
- CATCHALL(SIG_IGN);
+ ignore_sigs = TRUE;
break;
+#if USE_WIDEC_SUPPORT
case 'n':
- if ((MAXLINES = atoi(optarg)) < 1 ||
- (MAXLINES + 2) <= 1)
- usage();
- break;
-#if CAN_RESIZE
- case 'r':
- nonposix_resize = TRUE;
+ n_option = TRUE;
break;
#endif
case 's':
case 'T':
{
char *next = 0;
- int tvalue = strtol(optarg, &next, 0);
+ int tvalue = (int) strtol(optarg, &next, 0);
if (tvalue < 0 || (next != 0 && *next != 0))
usage();
trace((unsigned) tvalue);
if (optind + 1 != argc)
usage();
- if ((vec_lines = typeCalloc(NCURSES_CH_T *, (size_t) MAXLINES + 2)) == 0)
- usage();
-
- assert(vec_lines != 0);
-
- 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
-
- Trace(("slurp the file"));
- for (lptr = &vec_lines[0]; (lptr - vec_lines) < MAXLINES; lptr++) {
- char temp[BUFSIZ], *s, *d;
- int col;
-
- if (fgets(buf, sizeof(buf), fp) == 0)
- break;
-
-#if USE_WIDEC_SUPPORT
- if (lptr == vec_lines) {
- if (!memcmp("", buf, 3)) {
- Trace(("trim BOM"));
- s = buf + 3;
- d = buf;
- do {
- } while ((*d++ = *s++) != '\0');
- }
- }
-#endif
-
- /* convert tabs and nonprinting chars so that shift will work properly */
- for (s = buf, d = temp, col = 0; (*d = *s) != '\0'; s++) {
- if (*d == '\r') {
- if (s[1] == '\n')
- continue;
- else
- break;
- }
- if (*d == '\n') {
- *d = '\0';
- break;
- } else if (*d == '\t') {
- col = (col | 7) + 1;
- while ((d - temp) != col)
- *d++ = ' ';
- } else
-#if USE_WIDEC_SUPPORT
- col++, d++;
-#else
- if (isprint(UChar(*d))) {
- col++;
- d++;
- } else {
- sprintf(d, "\\%03o", UChar(*s));
- d += strlen(d);
- col = (int) (d - temp);
- }
-#endif
- }
- *lptr = ch_dup(temp);
- }
- (void) fclose(fp);
- num_lines = (int) (lptr - vec_lines);
-
- (void) initscr(); /* initialize the curses library */
+ InitAndCatch(initscr(), ignore_sigs ? SIG_IGN : finish);
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 */
nodelay(stdscr, TRUE);
idlok(stdscr, TRUE); /* allow use of insert/delete line */
+ read_file(fname = argv[optind]);
+
if (try_color) {
if (has_colors()) {
start_color();
show_all(my_label);
for (;;) {
-#if CAN_RESIZE
- if (interrupted) {
- adjust(0);
- my_label = "interrupt";
- }
- waiting = TRUE;
- c = getch();
- waiting = FALSE;
-#else
c = getch();
-#endif
if ((c < 127) && isdigit(c)) {
if (!got_number) {
MvPrintw(0, 0, "Count: ");
break;
case 'h':
+ /* FALLTHRU */
case KEY_HOME:
lptr = vec_lines;
break;
+ case '<':
+ if ((shift -= 8) < 0)
+ shift = 0;
+ break;
+ case '>':
+ shift += 8;
+ break;
+
case 'e':
+ /* FALLTHRU */
case KEY_END:
if (num_lines > LINES)
- lptr = vec_lines + num_lines - LINES + 1;
+ lptr = (vec_lines + num_lines - LINES + 1);
else
- lptr = vec_lines;
+ lptr = (vec_lines + (num_lines - 2));
+ break;
+
+ case CTRL('F'):
+ /* FALLTHRU */
+ case KEY_NPAGE:
+ for (i = 0; i < n; i++) {
+ if ((lptr - vec_lines) < (num_lines - 5))
+ lptr += (LINES - 1);
+ else
+ lptr = (vec_lines + num_lines - 2);
+ }
+ break;
+
+ case CTRL('B'):
+ /* FALLTHRU */
+ case KEY_PPAGE:
+ for (i = 0; i < n; i++) {
+ if ((lptr - vec_lines) >= LINES)
+ lptr -= (LINES - 1);
+ else
+ lptr = vec_lines;
+ }
break;
case 'r':
break;
case 'q':
+ case QUIT:
+ case ESCAPE:
done = TRUE;
break;
break;
#endif
case 's':
+#if HAVE_HALFDELAY
if (got_number) {
halfdelay(my_delay = n);
} else {
nodelay(stdscr, FALSE);
my_delay = -1;
}
+#else
+ nodelay(stdscr, FALSE);
+ my_delay = -1;
+#endif
break;
case ' ':
nodelay(stdscr, TRUE);
if (!my_delay)
napms(50);
break;
+ case HELP_KEY_1:
+ popup_msg(stdscr, help);
+ break;
default:
beep();
break;
finish(0); /* we're done */
}
-
-static RETSIGTYPE
-finish(int sig)
-{
- endwin();
-#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.
- * 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)
-{
- if (waiting || sig == 0) {
- struct winsize size;
-
- if (ioctl(fileno(stdout), TIOCGWINSZ, &size) == 0) {
- resize_term(size.ws_row, size.ws_col);
- wrefresh(curscr);
- show_all(sig ? "SIGWINCH" : "interrupt");
- }
- interrupted = FALSE;
- } else {
- interrupted = TRUE;
- }
- (void) signal(SIGWINCH, adjust); /* some systems need this */
-}
-#endif /* CAN_RESIZE */
-
-static void
-show_all(const char *tag)
-{
- int i;
- char temp[BUFSIZ];
- NCURSES_CH_T *s;
- time_t this_time;
-
-#if CAN_RESIZE
- sprintf(temp, "%.20s (%3dx%3d) col %d ", tag, LINES, COLS, shift);
- i = (int) strlen(temp);
- if ((i + 7) < (int) sizeof(temp)) {
- sprintf(temp + i, "view %.*s",
- (int) (sizeof(temp) - 7 - (size_t) i),
- fname);
- }
-#else
- (void) tag;
- sprintf(temp, "view %.*s", (int) sizeof(temp) - 7, fname);
-#endif
- move(0, 0);
- printw("%.*s", COLS, temp);
- clrtoeol();
- this_time = time((time_t *) 0);
- strncpy(temp, ctime(&this_time), 30);
- if ((i = (int) 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);
- 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();
-}
projects / ncurses.git / blobdiff