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-rw-r--r--gnu/usr.bin/dialog/textbox.c709
1 files changed, 0 insertions, 709 deletions
diff --git a/gnu/usr.bin/dialog/textbox.c b/gnu/usr.bin/dialog/textbox.c
deleted file mode 100644
index 23e1283..0000000
--- a/gnu/usr.bin/dialog/textbox.c
+++ /dev/null
@@ -1,709 +0,0 @@
-/*
- * textbox.c -- implements the text box
- *
- * AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-#include "dialog.h"
-
-
-static void back_lines(int n);
-static void print_page(WINDOW *win, int height, int width);
-static void print_line(WINDOW *win, int row, int width);
-static unsigned char *get_line(void);
-static int get_search_term(WINDOW *win, unsigned char *search_term, int height, int width);
-static void print_position(WINDOW *win, int height, int width);
-
-
-static int hscroll = 0, fd, file_size, bytes_read, begin_reached = 1,
- end_reached = 0, page_length;
-static unsigned char *buf, *page;
-
-
-/*
- * Display text from a file in a dialog box.
- */
-int dialog_textbox(unsigned char *title, unsigned char *file, int height, int width)
-{
- int i, x, y, cur_x, cur_y, fpos, key = 0, dir, temp, temp1;
-#ifdef HAVE_NCURSES
- int passed_end;
-#endif
- unsigned char search_term[MAX_LEN+1], *tempptr, *found;
- WINDOW *dialog, *text;
-
- search_term[0] = '\0'; /* no search term entered yet */
-
- /* Open input file for reading */
- if ((fd = open(file, O_RDONLY)) == -1) {
- endwin();
- fprintf(stderr, "\nCan't open input file in dialog_textbox().\n");
- exit(-1);
- }
- /* Get file size. Actually, 'file_size' is the real file size - 1,
- since it's only the last byte offset from the beginning */
- if ((file_size = lseek(fd, 0, SEEK_END)) == -1) {
- endwin();
- fprintf(stderr, "\nError getting file size in dialog_textbox().\n");
- exit(-1);
- }
- /* Restore file pointer to beginning of file after getting file size */
- if (lseek(fd, 0, SEEK_SET) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
- exit(-1);
- }
- /* Allocate space for read buffer */
- if ((buf = malloc(BUF_SIZE+1)) == NULL) {
- endwin();
- fprintf(stderr, "\nCan't allocate memory in dialog_textbox().\n");
- exit(-1);
- }
- if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
- endwin();
- fprintf(stderr, "\nError reading file in dialog_textbox().\n");
- exit(-1);
- }
- buf[bytes_read] = '\0'; /* mark end of valid data */
- page = buf; /* page is pointer to start of page to be displayed */
-
- /* center dialog box on screen */
- x = (COLS - width)/2;
- y = (LINES - height)/2;
-
-#ifdef HAVE_NCURSES
- if (use_shadow)
- draw_shadow(stdscr, y, x, height, width);
-#endif
- dialog = newwin(height, width, y, x);
- keypad(dialog, TRUE);
-
- /* Create window for text region, used for scrolling text */
-/* text = newwin(height-4, width-2, y+1, x+1); */
- text = subwin(dialog, height-4, width-2, y+1, x+1);
- keypad(text, TRUE);
-
- draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
-
- wattrset(dialog, border_attr);
- wmove(dialog, height-3, 0);
- waddch(dialog, ACS_LTEE);
- for (i = 0; i < width-2; i++)
- waddch(dialog, ACS_HLINE);
- wattrset(dialog, dialog_attr);
- waddch(dialog, ACS_RTEE);
- wmove(dialog, height-2, 1);
- for (i = 0; i < width-2; i++)
- waddch(dialog, ' ');
-
- if (title != NULL) {
- wattrset(dialog, title_attr);
- wmove(dialog, 0, (width - strlen(title))/2 - 1);
- waddch(dialog, ' ');
- waddstr(dialog, title);
- waddch(dialog, ' ');
- }
- print_button(dialog, " EXIT ", height-2, width/2-4, TRUE);
- wnoutrefresh(dialog);
- getyx(dialog, cur_y, cur_x); /* Save cursor position */
-
- /* Print first page of text */
- attr_clear(text, height-4, width-2, dialog_attr);
- print_page(text, height-4, width-2);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
-
- while ((key != ESC) && (key != '\n')) {
- key = wgetch(dialog);
- switch (key) {
- case 'E': /* Exit */
- case 'e':
- delwin(dialog);
- free(buf);
- close(fd);
- return 0;
- case 'g': /* First page */
- case KEY_HOME:
- if (!begin_reached) {
- begin_reached = 1;
- /* First page not in buffer? */
- if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
- exit(-1);
- }
- if (fpos > bytes_read) { /* Yes, we have to read it in */
- if (lseek(fd, 0, SEEK_SET) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
- exit(-1);
- }
- if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
- endwin();
- fprintf(stderr, "\nError reading file in dialog_textbox().\n");
- exit(-1);
- }
- buf[bytes_read] = '\0';
- }
- page = buf;
- print_page(text, height-4, width-2);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
- }
- break;
- case 'G': /* Last page */
-#ifdef HAVE_NCURSES
- case KEY_END:
-#endif
- end_reached = 1;
- /* Last page not in buffer? */
- if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
- exit(-1);
- }
- if (fpos < file_size) { /* Yes, we have to read it in */
- if (lseek(fd, -BUF_SIZE, SEEK_END) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
- exit(-1);
- }
- if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
- endwin();
- fprintf(stderr, "\nError reading file in dialog_textbox().\n");
- exit(-1);
- }
- buf[bytes_read] = '\0';
- }
- page = buf + bytes_read;
- back_lines(height-4);
- print_page(text, height-4, width-2);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
- break;
- case 'K': /* Previous line */
- case 'k':
- case KEY_UP:
- if (!begin_reached) {
- back_lines(page_length+1);
-#ifdef HAVE_NCURSES
- /* We don't call print_page() here but use scrolling to ensure
- faster screen update. However, 'end_reached' and 'page_length'
- should still be updated, and 'page' should point to start of
- next page. This is done by calling get_line() in the following
- 'for' loop. */
- scrollok(text, TRUE);
- wscrl(text, -1); /* Scroll text region down one line */
- scrollok(text, FALSE);
- page_length = 0;
- passed_end = 0;
- for (i = 0; i < height-4; i++) {
- if (!i) {
- print_line(text, 0, width-2); /* print first line of page */
- wnoutrefresh(text);
- }
- else
- get_line(); /* Called to update 'end_reached' and 'page' */
- if (!passed_end)
- page_length++;
- if (end_reached && !passed_end)
- passed_end = 1;
- }
-#else
- print_page(text, height-4, width-2);
-#endif
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
- }
- break;
- case 'B': /* Previous page */
- case 'b':
- case KEY_PPAGE:
- if (!begin_reached) {
- back_lines(page_length + height-4);
- print_page(text, height-4, width-2);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
- }
- break;
- case 'J': /* Next line */
- case 'j':
- case KEY_DOWN:
- if (!end_reached) {
- begin_reached = 0;
- scrollok(text, TRUE);
- scroll(text); /* Scroll text region up one line */
- scrollok(text, FALSE);
- print_line(text, height-5, width-2);
-#ifndef HAVE_NCURSES
- wmove(text, height-5, 0);
- waddch(text, ' ');
- wmove(text, height-5, width-3);
- waddch(text, ' ');
-#endif
- wnoutrefresh(text);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
- }
- break;
- case ' ': /* Next page */
- case KEY_NPAGE:
- if (!end_reached) {
- begin_reached = 0;
- print_page(text, height-4, width-2);
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
- }
- break;
- case '0': /* Beginning of line */
- case 'H': /* Scroll left */
- case 'h':
- case KEY_LEFT:
- if (hscroll > 0) {
- if (key == '0')
- hscroll = 0;
- else
- hscroll--;
- /* Reprint current page to scroll horizontally */
- back_lines(page_length);
- print_page(text, height-4, width-2);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
- }
- break;
- case 'L': /* Scroll right */
- case 'l':
- case KEY_RIGHT:
- if (hscroll < MAX_LEN) {
- hscroll++;
- /* Reprint current page to scroll horizontally */
- back_lines(page_length);
- print_page(text, height-4, width-2);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
- }
- break;
- case '/': /* Forward search */
- case 'n': /* Repeat forward search */
- case '?': /* Backward search */
- case 'N': /* Repeat backward search */
- /* set search direction */
- dir = (key == '/' || key == 'n') ? 1 : 0;
- if (dir ? !end_reached : !begin_reached) {
- if (key == 'n' || key == 'N') {
- if (search_term[0] == '\0') { /* No search term yet */
- fprintf(stderr, "\a"); /* beep */
- break;
- }
- }
- else /* Get search term from user */
- if (get_search_term(text, search_term, height-4, width-2) == -1) {
- /* ESC pressed in get_search_term(). Reprint page to clear box */
- wattrset(text, dialog_attr);
- back_lines(page_length);
- print_page(text, height-4, width-2);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
- break;
- }
- /* Save variables for restoring in case search term can't be found */
- tempptr = page;
- temp = begin_reached;
- temp1 = end_reached;
- if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
- exit(-1);
- }
- fpos -= bytes_read;
- /* update 'page' to point to next (previous) line before
- forward (backward) searching */
- back_lines(dir ? page_length-1 : page_length+1);
- found = NULL;
- if (dir) /* Forward search */
- while((found = strstr(get_line(), search_term)) == NULL) {
- if (end_reached)
- break;
- }
- else /* Backward search */
- while((found = strstr(get_line(), search_term)) == NULL) {
- if (begin_reached)
- break;
- back_lines(2);
- }
- if (found == NULL) { /* not found */
- fprintf(stderr, "\a"); /* beep */
- /* Restore program state to that before searching */
- if (lseek(fd, fpos, SEEK_SET) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
- exit(-1);
- }
- if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
- endwin();
- fprintf(stderr, "\nError reading file in dialog_textbox().\n");
- exit(-1);
- }
- buf[bytes_read] = '\0';
- page = tempptr;
- begin_reached = temp;
- end_reached = temp1;
- /* move 'page' to point to start of current page in order to
- re-print current page. Note that 'page' always points to
- start of next page, so this is necessary */
- back_lines(page_length);
- }
- else /* Search term found */
- back_lines(1);
- /* Reprint page */
- wattrset(text, dialog_attr);
- print_page(text, height-4, width-2);
- if (found != NULL)
- print_position(dialog, height, width);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
- }
- else /* no need to find */
- fprintf(stderr, "\a"); /* beep */
- break;
- case ESC:
- break;
- }
- }
-
- delwin(dialog);
- free(buf);
- close(fd);
- return -1; /* ESC pressed */
-}
-/* End of dialog_textbox() */
-
-
-/*
- * Go back 'n' lines in text file. Called by dialog_textbox().
- * 'page' will be updated to point to the desired line in 'buf'.
- */
-static void back_lines(int n)
-{
- int i, fpos;
-
- begin_reached = 0;
- /* We have to distinguish between end_reached and !end_reached since at end
- of file, the line is not ended by a '\n'. The code inside 'if' basically
- does a '--page' to move one character backward so as to skip '\n' of the
- previous line */
- if (!end_reached) {
- /* Either beginning of buffer or beginning of file reached? */
- if (page == buf) {
- if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in back_lines().\n");
- exit(-1);
- }
- if (fpos > bytes_read) { /* Not beginning of file yet */
- /* We've reached beginning of buffer, but not beginning of file yet,
- so read previous part of file into buffer. Note that we only
- move backward for BUF_SIZE/2 bytes, but not BUF_SIZE bytes to
- avoid re-reading again in print_page() later */
- /* Really possible to move backward BUF_SIZE/2 bytes? */
- if (fpos < BUF_SIZE/2 + bytes_read) {
- /* No, move less then */
- if (lseek(fd, 0, SEEK_SET) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in back_lines().\n");
- exit(-1);
- }
- page = buf + fpos - bytes_read;
- }
- else { /* Move backward BUF_SIZE/2 bytes */
- if (lseek(fd, -(BUF_SIZE/2 + bytes_read), SEEK_CUR) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in back_lines().\n");
- exit(-1);
- }
- page = buf + BUF_SIZE/2;
- }
- if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
- endwin();
- fprintf(stderr, "\nError reading file in back_lines().\n");
- exit(-1);
- }
- buf[bytes_read] = '\0';
- }
- else { /* Beginning of file reached */
- begin_reached = 1;
- return;
- }
- }
- if (*(--page) != '\n') { /* '--page' here */
- /* Something's wrong... */
- endwin();
- fprintf(stderr, "\nInternal error in back_lines().\n");
- exit(-1);
- }
- }
-
- /* Go back 'n' lines */
- for (i = 0; i < n; i++)
- do {
- if (page == buf) {
- if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in back_lines().\n");
- exit(-1);
- }
- if (fpos > bytes_read) {
- /* Really possible to move backward BUF_SIZE/2 bytes? */
- if (fpos < BUF_SIZE/2 + bytes_read) {
- /* No, move less then */
- if (lseek(fd, 0, SEEK_SET) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in back_lines().\n");
- exit(-1);
- }
- page = buf + fpos - bytes_read;
- }
- else { /* Move backward BUF_SIZE/2 bytes */
- if (lseek(fd, -(BUF_SIZE/2 + bytes_read), SEEK_CUR) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in back_lines().\n");
- exit(-1);
- }
- page = buf + BUF_SIZE/2;
- }
- if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
- endwin();
- fprintf(stderr, "\nError reading file in back_lines().\n");
- exit(-1);
- }
- buf[bytes_read] = '\0';
- }
- else { /* Beginning of file reached */
- begin_reached = 1;
- return;
- }
- }
- } while (*(--page) != '\n');
- page++;
-}
-/* End of back_lines() */
-
-
-/*
- * Print a new page of text. Called by dialog_textbox().
- */
-static void print_page(WINDOW *win, int height, int width)
-{
- int i, passed_end = 0;
-
- page_length = 0;
- for (i = 0; i < height; i++) {
- print_line(win, i, width);
- if (!passed_end)
- page_length++;
- if (end_reached && !passed_end)
- passed_end = 1;
- }
- wnoutrefresh(win);
-}
-/* End of print_page() */
-
-
-/*
- * Print a new line of text. Called by dialog_textbox() and print_page().
- */
-static void print_line(WINDOW *win, int row, int width)
-{
- int i, y, x;
- unsigned char *line;
-
- line = get_line();
- line += MIN(strlen(line),hscroll); /* Scroll horizontally */
- wmove(win, row, 0); /* move cursor to correct line */
- waddch(win,' ');
-#ifdef HAVE_NCURSES
- waddnstr(win, line, MIN(strlen(line),width-2));
-#else
- line[MIN(strlen(line),width-2)] = '\0';
- waddstr(win, line);
-#endif
-
- getyx(win, y, x);
- /* Clear 'residue' of previous line */
- for (i = 0; i < width-x; i++)
- waddch(win, ' ');
-}
-/* End of print_line() */
-
-
-/*
- * Return current line of text. Called by dialog_textbox() and print_line().
- * 'page' should point to start of current line before calling, and will be
- * updated to point to start of next line.
- */
-static unsigned char *get_line(void)
-{
- int i = 0, fpos;
- static unsigned char line[MAX_LEN+1];
-
- end_reached = 0;
- while (*page != '\n') {
- if (*page == '\0') { /* Either end of file or end of buffer reached */
- if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in get_line().\n");
- exit(-1);
- }
- if (fpos < file_size) { /* Not end of file yet */
- /* We've reached end of buffer, but not end of file yet, so read next
- part of file into buffer */
- if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
- endwin();
- fprintf(stderr, "\nError reading file in get_line().\n");
- exit(-1);
- }
- buf[bytes_read] = '\0';
- page = buf;
- }
- else {
- if (!end_reached)
- end_reached = 1;
- break;
- }
- }
- else
- if (i < MAX_LEN)
- line[i++] = *(page++);
- else {
- if (i == MAX_LEN) /* Truncate lines longer than MAX_LEN characters */
- line[i++] = '\0';
- page++;
- }
- }
- if (i <= MAX_LEN)
- line[i] = '\0';
- if (!end_reached)
- page++; /* move pass '\n' */
-
- return line;
-}
-/* End of get_line() */
-
-
-/*
- * Display a dialog box and get the search term from user
- */
-static int get_search_term(WINDOW *win, unsigned char *search_term, int height, int width)
-{
- int i, x, y, input_x = 0, scroll = 0, key = 0,
- box_height = 3, box_width = 30;
-
- x = (width - box_width)/2;
- y = (height - box_height)/2;
-#ifdef HAVE_NCURSES
- if (use_shadow)
- draw_shadow(win, y, x, box_height, box_width);
-#endif
- draw_box(win, y, x, box_height, box_width, dialog_attr, searchbox_border_attr);
- wattrset(win, searchbox_title_attr);
- wmove(win, y, x+box_width/2-4);
- waddstr(win, " Search ");
-
- box_width -= 2;
- wmove(win, y+1, x+1);
- wrefresh(win);
- search_term[0] = '\0';
- wattrset(win, searchbox_attr);
- while (key != ESC) {
- key = wgetch(win);
- switch (key) {
- case '\n':
- if (search_term[0] != '\0')
- return 0;
- break;
- case KEY_BACKSPACE:
- if (input_x || scroll) {
- if (!input_x) {
- scroll = scroll < box_width-1 ? 0 : scroll-(box_width-1);
- wmove(win, y+1, x+1);
- for (i = 0; i < box_width; i++)
- waddch(win, search_term[scroll+input_x+i] ?
- search_term[scroll+input_x+i] : ' ');
- input_x = strlen(search_term) - scroll;
- }
- else
- input_x--;
- search_term[scroll+input_x] = '\0';
- wmove(win, y+1, input_x + x+1);
- waddch(win, ' ');
- wmove(win, y+1, input_x + x+1);
- wrefresh(win);
- }
- break;
- case ESC:
- break;
- default:
- if (isprint(key))
- if (scroll+input_x < MAX_LEN) {
- search_term[scroll+input_x] = key;
- search_term[scroll+input_x+1] = '\0';
- if (input_x == box_width-1) {
- scroll++;
- wmove(win, y+1, x+1);
- for (i = 0; i < box_width-1; i++)
- waddch(win, search_term[scroll+i]);
- }
- else {
- wmove(win, y+1, input_x++ + x+1);
- waddch(win, key);
- }
- wrefresh(win);
- }
- }
- }
-
- return -1; /* ESC pressed */
-}
-/* End of get_search_term() */
-
-
-/*
- * Print current position
- */
-static void print_position(WINDOW *win, int height, int width)
-{
- int fpos, percent;
-
- if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
- endwin();
- fprintf(stderr, "\nError moving file pointer in print_position().\n");
- exit(-1);
- }
- wattrset(win, position_indicator_attr);
- percent = !file_size ? 100 : ((fpos-bytes_read+page-buf)*100)/file_size;
- wmove(win, height-3, width-9);
- wprintw(win, "(%3d%%)", percent);
-}
-/* End of print_position() */
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