* scroll operation worked, and the refresh() code only had to do a
* partial repaint.
*
- * $Id: view.c,v 1.104 2017/09/30 17:50:38 tom Exp $
+ * $Id: view.c,v 1.111 2017/10/15 00:56:58 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> */
+static void finish(int sig) GCC_NORETURN;
+
#if HAVE_TERMIOS_H
# include <termios.h>
#else
#undef CTRL
#define CTRL(x) ((x) & 0x1f)
-static void 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
#endif
#if CAN_RESIZE
-static void adjust(int sig);
static int interrupted;
static bool waiting = FALSE;
#endif
static void usage(void) GCC_NORETURN;
+static void
+failed(const char *msg)
+{
+ fprintf(stderr, "%s\n", msg);
+ ExitProgram(EXIT_FAILURE);
+}
+
static void
usage(void)
{
,"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
return dst;
}
+static void
+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);
+}
+
+static void
+show_all(const char *tag)
+{
+ int i;
+ char temp[BUFSIZ];
+ NCURSES_CH_T *s;
+ time_t this_time;
+
+#if CAN_RESIZE
+ _nc_SPRINTF(temp, _nc_SLIMIT(sizeof(temp))
+ "%.20s (%3dx%3d) col %d ", tag, LINES, COLS, shift);
+ i = (int) strlen(temp);
+ if ((i + 7) < (int) sizeof(temp)) {
+ _nc_SPRINTF(temp + i, _nc_SLIMIT(sizeof(temp) - (size_t) i)
+ "view %.*s",
+ (int) (sizeof(temp) - 7 - (size_t) i),
+ fname);
+ }
+#else
+ (void) tag;
+ _nc_SPRINTF(temp, _nc_SLIMIT(sizeof(temp))
+ "view %.*s", (int) sizeof(temp) - 7, fname);
+#endif
+ 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) {
+ clrtobot();
+ break;
+ }
+ move(i, 0);
+ printw("%3d:", actual);
+ clrtoeol();
+ if ((s = lptr[i - 1]) == 0) {
+ continue;
+ }
+ 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, WA_NORMAL, my_pair, NULL);
+#endif
+ }
+ setscrreg(1, LINES - 1);
+ scrollok(stdscr, TRUE);
+ refresh();
+}
+
+#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 void
+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
+read_file(const char *filename)
+{
+ FILE *fp;
+ int pass;
+ int k;
+ size_t j;
+ size_t len;
+ struct stat sb;
+ char *my_blob;
+ char **my_vec = 0;
+
+ 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 ((vec_lines = typeCalloc(NCURSES_CH_T *, (size_t) num_lines + 2)) == 0)
+ failed("cannot allocate line-vector #2");
+
+ Trace(("slurp the file"));
+ for (k = 0; k < num_lines; ++k) {
+ char *buf = my_vec[k];
+ char temp[BUFSIZ], *s, *d;
+ int col;
+
+ lptr = &vec_lines[k];
+
+#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 {
+ _nc_SPRINTF(d, _nc_SLIMIT(sizeof(temp) - (d - buf))
+ "\\%03o", UChar(*s));
+ d += strlen(d);
+ col = (int) (d - temp);
+ }
+#endif
+ }
+ *lptr = ch_dup(temp);
+ }
+
+ free(my_vec);
+ free(my_blob);
+}
+
int
main(int argc, char *argv[])
{
" r,<Right> - scroll the viewport right by one column",
"",
" 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
};
- int MAXLINES = 1000;
- FILE *fp;
- char buf[BUFSIZ];
int i;
int my_delay = 0;
NCURSES_CH_T **olptr;
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, "cirstT:")) != -1) {
switch (i) {
case 'c':
try_color = TRUE;
case 'i':
ignore_sigs = TRUE;
break;
- case 'n':
- if ((MAXLINES = atoi(optarg)) < 1 ||
- (MAXLINES + 2) <= 1)
- usage();
- break;
#if CAN_RESIZE
case 'r':
nonposix_resize = TRUE;
if (optind + 1 != argc)
usage();
- if ((vec_lines = typeCalloc(NCURSES_CH_T *, (size_t) MAXLINES + 2)) == 0)
- usage();
-
- assert(vec_lines != 0);
+ read_file(fname = argv[optind]);
- 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 {
- _nc_SPRINTF(d, _nc_SLIMIT(sizeof(temp) - (d - buf))
- "\\%03o", UChar(*s));
- d += strlen(d);
- col = (int) (d - temp);
- }
-#endif
- }
- *lptr = ch_dup(temp);
- }
- (void) fclose(fp);
- num_lines = (int) (lptr - vec_lines);
-
- if (ignore_sigs) {
- InitAndCatch(initscr(), SIG_IGN);
- } else {
- initscr();
- }
+ 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 */
scrl((int) (lptr - olptr));
break;
+ case '<':
+ shift = 0;
+ /* FALLTHRU */
case 'h':
+ /* FALLTHRU */
case KEY_HOME:
lptr = vec_lines;
break;
+ case '>':
+ shift = 0;
+ /* FALLTHRU */
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 + (num_lines - 2));
+ break;
+
+ case CTRL('F'):
+ /* FALLTHRU */
+ case KEY_NPAGE:
+ 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:
+ if ((lptr - vec_lines) >= LINES)
+ lptr -= (LINES - 1);
else
lptr = vec_lines;
break;
finish(0); /* we're done */
}
-
-static void
-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 void
-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
- _nc_SPRINTF(temp, _nc_SLIMIT(sizeof(temp))
- "%.20s (%3dx%3d) col %d ", tag, LINES, COLS, shift);
- i = (int) strlen(temp);
- if ((i + 7) < (int) sizeof(temp)) {
- _nc_SPRINTF(temp + i, _nc_SLIMIT(sizeof(temp) - (size_t) i)
- "view %.*s",
- (int) (sizeof(temp) - 7 - (size_t) i),
- fname);
- }
-#else
- (void) tag;
- _nc_SPRINTF(temp, _nc_SLIMIT(sizeof(temp))
- "view %.*s", (int) sizeof(temp) - 7, fname);
-#endif
- 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++) {
- 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, WA_NORMAL, my_pair, NULL);
-#endif
- }
- }
- setscrreg(1, LINES - 1);
- scrollok(stdscr, TRUE);
- refresh();
-}
projects / ncurses.git / blobdiff