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+/****************************************************************************
+ * Copyright (c) 2017,2019 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. *
+ ****************************************************************************/
+/*
+ * clone of view.c, using pads
+ *
+ * $Id: padview.c,v 1.15 2019/12/07 18:06:12 tom Exp $
+ */
+
+#include <test.priv.h>
+#include <widechars.h>
+#include <popup_msg.h>
+
+#include <sys/stat.h>
+#include <time.h>
+
+#if HAVE_NEWPAD
+
+static void finish(int sig) GCC_NORETURN;
+
+#define my_pair 1
+
+static int shift = 0;
+static bool try_color = FALSE;
+
+static char *fname;
+static int num_lines;
+
+#if USE_WIDEC_SUPPORT
+static bool n_option = FALSE;
+#endif
+
+static void usage(void) GCC_NORETURN;
+
+static void
+failed(const char *msg)
+{
+ endwin();
+ fprintf(stderr, "%s\n", msg);
+ ExitProgram(EXIT_FAILURE);
+}
+
+static void
+finish(int sig)
+{
+ endwin();
+ ExitProgram(sig != 0 ? EXIT_FAILURE : EXIT_SUCCESS);
+}
+
+static void
+show_all(const char *tag, WINDOW *my_pad, int my_row)
+{
+ int i;
+ int digits;
+ char temp[BUFSIZ];
+ time_t this_time;
+
+ for (digits = 1, i = num_lines; i > 0; i /= 10) {
+ ++digits;
+ }
+
+ wattrset(stdscr, COLOR_PAIR(my_pair));
+ clear();
+
+ _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) - (size_t) i)
+ " %.*s", (int) sizeof(temp) - i - 2, fname);
+ mvprintw(0, 0, "%.*s", COLS, temp);
+ this_time = time((time_t *) 0);
+ _nc_STRNCPY(temp, ctime(&this_time), (size_t) 30);
+ if ((i = (int) strlen(temp)) != 0) {
+ temp[--i] = 0;
+ mvprintw(0, COLS - i - 2, " %s", temp);
+ }
+
+ for (i = 1; i < LINES; i++) {
+ int actual = my_row + i;
+ if (actual > num_lines) {
+ break;
+ }
+ mvprintw(i, 0, "%*d:", digits, actual);
+ }
+ wnoutrefresh(stdscr);
+ pnoutrefresh(my_pad, my_row, shift, 1, digits + 1, LINES - 1, COLS - 1);
+ doupdate();
+}
+
+static WINDOW *
+read_file(const char *filename)
+{
+ FILE *fp;
+ int pass;
+ int k;
+ int height, width;
+ size_t j;
+ size_t len;
+ struct stat sb;
+ char *my_blob;
+ char **my_vec = 0;
+ WINDOW *my_pad;
+
+ 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
+
+ height = num_lines;
+ 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_pad = newpad(height, width);
+ if (my_pad == 0)
+ failed("cannot allocate pad workspace");
+ if (try_color) {
+ wattrset(my_pad, COLOR_PAIR(my_pair));
+ wbkgd(my_pad, (chtype) (' ' | COLOR_PAIR(my_pair)));
+ }
+
+ /*
+ * Use the curses library for rendering, including tab-conversion.
+ */
+ Trace(("slurp the file"));
+ for (k = 0; my_vec[k]; ++k) {
+ char *s;
+#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;
+#endif
+#endif /* USE_WIDEC_SUPPORT */
+
+ wmove(my_pad, k, 0);
+#if USE_WIDEC_SUPPORT
+ wch[1] = 0;
+ reset_mbytes(state);
+#endif
+ for (s = my_vec[k]; *s != '\0'; ++s) {
+#if USE_WIDEC_SUPPORT
+ 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_pad, wch);
+ } else
+#endif
+ waddch(my_pad, *s & 0xff);
+ }
+ }
+
+ free(my_vec);
+ free(my_blob);
+
+ return my_pad;
+}
+
+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
+ ," -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
+ };
+ 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[])
+{
+ 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;
+ WINDOW *my_pad;
+ int my_row = 0;
+ int value = 0;
+ bool done = FALSE;
+ bool got_number = FALSE;
+ bool ignore_sigs = FALSE;
+ bool single_step = FALSE;
+ const char *my_label = "Input";
+
+ setlocale(LC_ALL, "");
+
+ while ((i = getopt(argc, argv, "cinstT:")) != -1) {
+ switch (i) {
+ case 'c':
+ try_color = TRUE;
+ break;
+ case 'i':
+ ignore_sigs = TRUE;
+ break;
+#if USE_WIDEC_SUPPORT
+ case 'n':
+ n_option = TRUE;
+ break;
+#endif
+ case 's':
+ single_step = TRUE;
+ break;
+#ifdef TRACE
+ case 'T':
+ {
+ char *next = 0;
+ int tvalue = (int) strtol(optarg, &next, 0);
+ if (tvalue < 0 || (next != 0 && *next != 0))
+ usage();
+ curses_trace((unsigned) tvalue);
+ }
+ break;
+ case 't':
+ curses_trace(TRACE_CALLS);
+ break;
+#endif
+ default:
+ usage();
+ }
+ }
+ if (optind + 1 != argc)
+ usage();
+
+ 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 */
+ (void) noecho(); /* don't echo input */
+ if (!single_step)
+ 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((chtype) (' ' | COLOR_PAIR(my_pair)));
+ } else {
+ try_color = FALSE;
+ }
+ }
+
+ /*
+ * Do this after starting color, otherwise the pad's background will be
+ * uncolored after the ncurses 6.1.20181208 fixes.
+ */
+ my_pad = read_file(fname = argv[optind]);
+
+ my_row = 0;
+ while (!done) {
+ int n, c;
+
+ if (!got_number)
+ show_all(my_label, my_pad, my_row);
+
+ for (;;) {
+ c = getch();
+ 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 (got_number && value) {
+ n = value;
+ } else {
+ n = 1;
+ }
+
+ if (c != ERR)
+ my_label = keyname(c);
+ switch (c) {
+ case KEY_DOWN:
+ case 'n':
+ for (i = 0; i < n; i++)
+ if (my_row < (num_lines - LINES + 1))
+ my_row++;
+ else
+ break;
+ break;
+
+ case KEY_UP:
+ case 'p':
+ for (i = 0; i < n; i++)
+ if (my_row > 0)
+ my_row--;
+ else
+ break;
+ break;
+
+ case 'h':
+ /* FALLTHRU */
+ case KEY_HOME:
+ my_row = 0;
+ break;
+
+ case '<':
+ if ((shift -= 8) < 0)
+ shift = 0;
+ break;
+ case '>':
+ shift += 8;
+ break;
+
+ case 'e':
+ /* FALLTHRU */
+ case KEY_END:
+ if (num_lines > LINES)
+ my_row = (num_lines - LINES + 1);
+ else
+ my_row = (num_lines - 2);
+ break;
+
+ case CTRL('F'):
+ /* FALLTHRU */
+ case KEY_NPAGE:
+ for (i = 0; i < n; i++) {
+ if (my_row < (num_lines - 5))
+ my_row += (LINES - 1);
+ else
+ my_row = (num_lines - 2);
+ }
+ break;
+
+ case CTRL('B'):
+ /* FALLTHRU */
+ case KEY_PPAGE:
+ for (i = 0; i < n; i++) {
+ if (my_row >= LINES)
+ my_row -= (LINES - 1);
+ else
+ my_row = 0;
+ }
+ break;
+
+ case 'r':
+ case KEY_RIGHT:
+ shift += n;
+ break;
+
+ case 'l':
+ case KEY_LEFT:
+ shift -= n;
+ if (shift < 0) {
+ shift = 0;
+ beep();
+ }
+ break;
+
+ case 'q':
+ case QUIT:
+ case ESCAPE:
+ done = TRUE;
+ break;
+
+#ifdef KEY_RESIZE
+ case KEY_RESIZE: /* ignore this; ncurses will repaint */
+ 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);
+ my_delay = 0;
+ break;
+ case CTRL('L'):
+ redrawwin(stdscr);
+ break;
+ case ERR:
+ if (!my_delay)
+ napms(50);
+ break;
+ case HELP_KEY_1:
+ popup_msg(stdscr, help);
+ break;
+ default:
+ beep();
+ break;
+ }
+ if (c >= KEY_MIN || (c > 0 && !isdigit(c))) {
+ got_number = FALSE;
+ value = 0;
+ }
+ }
+
+ finish(0); /* we're done */
+}
+#else
+int
+main(void)
+{
+ printf("This program requires the curses pad functions\n");
+ ExitProgram(EXIT_FAILURE);
+}
+#endif