diff options
Diffstat (limited to 'gnu/lib/libodialog/textbox.c')
-rw-r--r-- | gnu/lib/libodialog/textbox.c | 699 |
1 files changed, 0 insertions, 699 deletions
diff --git a/gnu/lib/libodialog/textbox.c b/gnu/lib/libodialog/textbox.c deleted file mode 100644 index 19a13bb..0000000 --- a/gnu/lib/libodialog/textbox.c +++ /dev/null @@ -1,699 +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 <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <dialog.h> -#include "dialog.priv.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; - - if (height < 0 || width < 0) { - fprintf(stderr, "\nAutosizing is impossible in dialog_textbox().\n"); - return(-1); - } - - search_term[0] = '\0'; /* no search term entered yet */ - - /* Open input file for reading */ - if ((fd = open(file, O_RDONLY)) == -1) { - fprintf(stderr, "\nCan't open input file <%s>in dialog_textbox().\n", file); - return(-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) { - fprintf(stderr, "\nError getting file size in dialog_textbox().\n"); - return(-1); - } - /* Restore file pointer to beginning of file after getting file size */ - if (lseek(fd, 0, SEEK_SET) == -1) { - fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n"); - return(-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) { - fprintf(stderr, "\nError reading file in dialog_textbox().\n"); - return(-1); - } - buf[bytes_read] = '\0'; /* mark end of valid data */ - page = buf; /* page is pointer to start of page to be displayed */ - - if (width > COLS) - width = COLS; - if (height > LINES) - height = LINES; - /* center dialog box on screen */ - x = DialogX ? DialogX : (COLS - width)/2; - y = DialogY ? DialogY : (LINES - height)/2; - -#ifdef HAVE_NCURSES - if (use_shadow) - draw_shadow(stdscr, y, x, height, width); -#endif - dialog = newwin(height, width, y, x); - if (dialog == NULL) { - endwin(); - fprintf(stderr, "\nnewwin(%d,%d,%d,%d) failed, maybe wrong dims\n", height,width,y,x); - exit(1); - } - 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); - if (text == NULL) { - endwin(); - fprintf(stderr, "\nsubwin(dialog,%d,%d,%d,%d) failed, maybe wrong dims\n", height-4,width-2,y+1,x+1); - exit(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, ' '); - } - display_helpline(dialog, height-1, width); - - print_button(dialog, " OK ", height-2, width/2-6, 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 != '\r') && (key != ' ')) { - 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 '\020': /* ^P */ - 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 '\016': /* ^N */ - 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 'F': /* Next page */ - case 'f': - 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; - case KEY_F(1): - display_helpfile(); - break; - } - } - - delwin(dialog); - free(buf); - close(fd); - return (key == ESC ? -1 : 0); -} -/* 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 x, y, key = 0, first, - 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 "); - wattrset(win, dialog_attr); - - search_term[0] = '\0'; - - first = 1; - while (key != ESC) { - key = line_edit(win, y+1, x+1, -1, box_width-2, searchbox_attr, first, search_term, 0); - first = 0; - switch (key) { - case '\n': - if (search_term[0] != '\0') - return 0; - break; - case ESC: - break; - } - } - - 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() */ |