From b1c5f1c635f4a821f834ed51ccd8a2a1515fffd2 Mon Sep 17 00:00:00 2001 From: Sam Ravnborg Date: Sat, 19 Nov 2005 19:13:34 +0100 Subject: kconfig: Lindent scripts/lxdialog The lxdialog code was not easy to read. So as first step the code was run through Lindent. Fix-ups will come in next patchset. Signed-off-by: Sam Ravnborg --- scripts/lxdialog/textbox.c | 968 +++++++++++++++++++++++---------------------- 1 file changed, 493 insertions(+), 475 deletions(-) (limited to 'scripts/lxdialog/textbox.c') diff --git a/scripts/lxdialog/textbox.c b/scripts/lxdialog/textbox.c index ed23df2d096a..d6e7f2afe31a 100644 --- a/scripts/lxdialog/textbox.c +++ b/scripts/lxdialog/textbox.c @@ -21,11 +21,11 @@ #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 char *get_line (void); -static void print_position (WINDOW * win, int height, int width); +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 char *get_line(void); +static void print_position(WINDOW * win, int height, int width); static int hscroll, fd, file_size, bytes_read; static int begin_reached = 1, end_reached, page_length; @@ -34,450 +34,466 @@ static char *buf, *page; /* * Display text from a file in a dialog box. */ -int -dialog_textbox (const char *title, const char *file, int height, int width) +int dialog_textbox(const char *title, const char *file, int height, int width) { - int i, x, y, cur_x, cur_y, fpos, key = 0; - int passed_end; - char search_term[MAX_LEN + 1]; - 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; - - - draw_shadow (stdscr, y, x, height, width); - - dialog = newwin (height, width, y, x); - keypad (dialog, TRUE); - - /* Create window for text region, used for scrolling text */ - text = subwin (dialog, height - 4, width - 2, y + 1, x + 1); - wattrset (text, dialog_attr); - wbkgdset (text, dialog_attr & A_COLOR); - - keypad (text, TRUE); - - /* register the new window, along with its borders */ - draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr); - - wattrset (dialog, border_attr); - mvwaddch (dialog, height-3, 0, ACS_LTEE); - for (i = 0; i < width - 2; i++) - waddch (dialog, ACS_HLINE); - wattrset (dialog, dialog_attr); - wbkgdset (dialog, dialog_attr & A_COLOR); - waddch (dialog, ACS_RTEE); - - if (title != NULL && strlen(title) >= width-2 ) { - /* truncate long title -- mec */ - char * title2 = malloc(width-2+1); - memcpy( title2, title, width-2 ); - title2[width-2] = '\0'; - title = title2; - } - - if (title != NULL) { - wattrset (dialog, title_attr); - mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' '); - waddstr (dialog, (char *)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': - case 'X': - case 'x': - 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 */ - case KEY_END: - - 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); - - /* 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 first line of page */ - print_line (text, 0, width - 2); - wnoutrefresh (text); - } else - /* Called to update 'end_reached' and 'page' */ - get_line (); - if (!passed_end) - page_length++; - if (end_reached && !passed_end) - passed_end = 1; - } + int i, x, y, cur_x, cur_y, fpos, key = 0; + int passed_end; + char search_term[MAX_LEN + 1]; + 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; + + draw_shadow(stdscr, y, x, height, width); + + dialog = newwin(height, width, y, x); + keypad(dialog, TRUE); + + /* Create window for text region, used for scrolling text */ + text = subwin(dialog, height - 4, width - 2, y + 1, x + 1); + wattrset(text, dialog_attr); + wbkgdset(text, dialog_attr & A_COLOR); + + keypad(text, TRUE); + + /* register the new window, along with its borders */ + draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr); + + wattrset(dialog, border_attr); + mvwaddch(dialog, height - 3, 0, ACS_LTEE); + for (i = 0; i < width - 2; i++) + waddch(dialog, ACS_HLINE); + wattrset(dialog, dialog_attr); + wbkgdset(dialog, dialog_attr & A_COLOR); + waddch(dialog, ACS_RTEE); + + if (title != NULL && strlen(title) >= width - 2) { + /* truncate long title -- mec */ + char *title2 = malloc(width - 2 + 1); + memcpy(title2, title, width - 2); + title2[width - 2] = '\0'; + title = title2; + } - 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) - break; - back_lines (page_length + height - 4); - print_page (text, height - 4, width - 2); - print_position (dialog, height, width); - wmove (dialog, cur_y, cur_x); - 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); - wnoutrefresh (text); - print_position (dialog, height, width); - wmove (dialog, cur_y, cur_x); /* Restore cursor position */ - wrefresh (dialog); - } - break; - case KEY_NPAGE: /* Next page */ - case ' ': - if (end_reached) - break; - - begin_reached = 0; - print_page (text, height - 4, width - 2); - print_position (dialog, height, width); - wmove (dialog, cur_y, cur_x); - wrefresh (dialog); - break; - case '0': /* Beginning of line */ - case 'H': /* Scroll left */ - case 'h': - case KEY_LEFT: - if (hscroll <= 0) - break; - - 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); - wrefresh (dialog); - break; - case 'L': /* Scroll right */ - case 'l': - case KEY_RIGHT: - if (hscroll >= MAX_LEN) - break; - hscroll++; - /* Reprint current page to scroll horizontally */ - back_lines (page_length); - print_page (text, height - 4, width - 2); - wmove (dialog, cur_y, cur_x); - wrefresh (dialog); - break; - case ESC: - break; + if (title != NULL) { + wattrset(dialog, title_attr); + mvwaddch(dialog, 0, (width - strlen(title)) / 2 - 1, ' '); + waddstr(dialog, (char *)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': + case 'X': + case 'x': + 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 */ + case KEY_END: + + 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); + + /* 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 first line of page */ + print_line(text, 0, width - 2); + wnoutrefresh(text); + } else + /* Called to update 'end_reached' and 'page' */ + get_line(); + if (!passed_end) + page_length++; + if (end_reached && !passed_end) + passed_end = 1; + } + + 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) + break; + back_lines(page_length + height - 4); + print_page(text, height - 4, width - 2); + print_position(dialog, height, width); + wmove(dialog, cur_y, cur_x); + 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); + wnoutrefresh(text); + print_position(dialog, height, width); + wmove(dialog, cur_y, cur_x); /* Restore cursor position */ + wrefresh(dialog); + } + break; + case KEY_NPAGE: /* Next page */ + case ' ': + if (end_reached) + break; + + begin_reached = 0; + print_page(text, height - 4, width - 2); + print_position(dialog, height, width); + wmove(dialog, cur_y, cur_x); + wrefresh(dialog); + break; + case '0': /* Beginning of line */ + case 'H': /* Scroll left */ + case 'h': + case KEY_LEFT: + if (hscroll <= 0) + break; + + 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); + wrefresh(dialog); + break; + case 'L': /* Scroll right */ + case 'l': + case KEY_RIGHT: + if (hscroll >= MAX_LEN) + break; + hscroll++; + /* Reprint current page to scroll horizontally */ + back_lines(page_length); + print_page(text, height - 4, width - 2); + wmove(dialog, cur_y, cur_x); + wrefresh(dialog); + break; + case ESC: + break; + } } - } - delwin (dialog); - free (buf); - close (fd); - return -1; /* ESC pressed */ + delwin(dialog); + free(buf); + close(fd); + return -1; /* ESC pressed */ } /* * 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) +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; + 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 ((bytes_read = read (fd, buf, BUF_SIZE)) == -1) { - endwin (); - fprintf (stderr, "\nError reading file in back_lines().\n"); - exit (-1); + if (*(--page) != '\n') { /* '--page' here */ + /* Something's wrong... */ + endwin(); + fprintf(stderr, "\nInternal error 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); + /* 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; + } } - 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++; + } while (*(--page) != '\n'); + page++; } /* * Print a new page of text. Called by dialog_textbox(). */ -static void -print_page (WINDOW * win, int height, int width) +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); + 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); } /* * Print a new line of text. Called by dialog_textbox() and print_page(). */ -static void -print_line (WINDOW * win, int row, int width) +static void print_line(WINDOW * win, int row, int width) { - int y, x; - char *line; + int y, x; + char *line; - line = get_line (); - line += MIN (strlen (line), hscroll); /* Scroll horizontally */ - wmove (win, row, 0); /* move cursor to correct line */ - waddch (win, ' '); - waddnstr (win, line, MIN (strlen (line), width - 2)); + line = get_line(); + line += MIN(strlen(line), hscroll); /* Scroll horizontally */ + wmove(win, row, 0); /* move cursor to correct line */ + waddch(win, ' '); + waddnstr(win, line, MIN(strlen(line), width - 2)); - getyx (win, y, x); - /* Clear 'residue' of previous line */ + getyx(win, y, x); + /* Clear 'residue' of previous line */ #if OLD_NCURSES - { - int i; - for (i = 0; i < width - x; i++) - waddch (win, ' '); - } + { + int i; + for (i = 0; i < width - x; i++) + waddch(win, ' '); + } #else - wclrtoeol(win); + wclrtoeol(win); #endif } @@ -486,71 +502,73 @@ print_line (WINDOW * win, int row, int width) * 'page' should point to start of current line before calling, and will be * updated to point to start of next line. */ -static char * -get_line (void) +static char *get_line(void) { - int i = 0, fpos; - static 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); + int i = 0, fpos; + static 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 { + /* Truncate lines longer than MAX_LEN characters */ + if (i == MAX_LEN) + line[i++] = '\0'; + page++; } - buf[bytes_read] = '\0'; - page = buf; - } else { - if (!end_reached) - end_reached = 1; - break; - } - } else if (i < MAX_LEN) - line[i++] = *(page++); - else { - /* Truncate lines longer than MAX_LEN characters */ - if (i == MAX_LEN) - line[i++] = '\0'; - page++; } - } - if (i <= MAX_LEN) - line[i] = '\0'; - if (!end_reached) - page++; /* move pass '\n' */ + if (i <= MAX_LEN) + line[i] = '\0'; + if (!end_reached) + page++; /* move pass '\n' */ - return line; + return line; } /* * Print current position */ -static void -print_position (WINDOW * win, int height, int width) +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); - wbkgdset (win, position_indicator_attr & A_COLOR); - percent = !file_size ? - 100 : ((fpos - bytes_read + page - buf) * 100) / file_size; - wmove (win, height - 3, width - 9); - wprintw (win, "(%3d%%)", percent); + 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); + wbkgdset(win, position_indicator_attr & A_COLOR); + percent = !file_size ? + 100 : ((fpos - bytes_read + page - buf) * 100) / file_size; + wmove(win, height - 3, width - 9); + wprintw(win, "(%3d%%)", percent); } -- cgit From dec69da856653772d7ee7b2f98dc69da27274a22 Mon Sep 17 00:00:00 2001 From: Sam Ravnborg Date: Sat, 19 Nov 2005 21:56:20 +0100 Subject: kconfig: fixup after Lindent Readability are more important then the 80 coloumn limit, so fold several lines to greatly improve readability. Also keep return type on same line as function definition. Signed-off-by: Sam Ravnborg --- scripts/lxdialog/textbox.c | 93 ++++++++++++++++------------------------------ 1 file changed, 32 insertions(+), 61 deletions(-) (limited to 'scripts/lxdialog/textbox.c') diff --git a/scripts/lxdialog/textbox.c b/scripts/lxdialog/textbox.c index d6e7f2afe31a..fa8d92ea02b6 100644 --- a/scripts/lxdialog/textbox.c +++ b/scripts/lxdialog/textbox.c @@ -46,30 +46,26 @@ int dialog_textbox(const char *title, const char *file, int height, int width) /* Open input file for reading */ if ((fd = open(file, O_RDONLY)) == -1) { endwin(); - fprintf(stderr, - "\nCan't open input file in dialog_textbox().\n"); + 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"); + 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"); + 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"); + fprintf(stderr, "\nCan't allocate memory in dialog_textbox().\n"); exit(-1); } if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) { @@ -150,23 +146,20 @@ int dialog_textbox(const char *title, const char *file, int height, int width) /* First page not in buffer? */ if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) { endwin(); - fprintf(stderr, - "\nError moving file pointer in dialog_textbox().\n"); + 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"); + 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"); + fprintf(stderr, "\nError reading file in dialog_textbox().\n"); exit(-1); } buf[bytes_read] = '\0'; @@ -185,22 +178,19 @@ int dialog_textbox(const char *title, const char *file, int height, int width) /* Last page not in buffer? */ if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) { endwin(); - fprintf(stderr, - "\nError moving file pointer in dialog_textbox().\n"); + 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"); + 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"); + fprintf(stderr, "\nError reading file in dialog_textbox().\n"); exit(-1); } buf[bytes_read] = '\0'; @@ -342,9 +332,8 @@ static void back_lines(int n) if (page == buf) { if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) { endwin(); - fprintf(stderr, - "\nError moving file pointer in " - "back_lines().\n"); + fprintf(stderr, "\nError moving file pointer in " + "back_lines().\n"); exit(-1); } if (fpos > bytes_read) { /* Not beginning of file yet */ @@ -358,21 +347,16 @@ static void back_lines(int n) /* No, move less then */ if (lseek(fd, 0, SEEK_SET) == -1) { endwin(); - fprintf(stderr, - "\nError moving file pointer in " - "back_lines().\n"); + 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) { + if (lseek (fd, -(BUF_SIZE / 2 + bytes_read), SEEK_CUR) == -1) { endwin(); - fprintf(stderr, - "\nError moving file pointer " - "in back_lines().\n"); + fprintf(stderr, "\nError moving file pointer " + "in back_lines().\n"); exit(-1); } page = buf + BUF_SIZE / 2; @@ -380,8 +364,7 @@ static void back_lines(int n) if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) { endwin(); - fprintf(stderr, - "\nError reading file in back_lines().\n"); + fprintf(stderr, "\nError reading file in back_lines().\n"); exit(-1); } buf[bytes_read] = '\0'; @@ -403,33 +386,25 @@ static void back_lines(int n) if (page == buf) { if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) { endwin(); - fprintf(stderr, - "\nError moving file pointer in back_lines().\n"); + 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) { + if (lseek(fd, 0, SEEK_SET) == -1) { endwin(); - fprintf(stderr, - "\nError moving file pointer " - "in back_lines().\n"); + 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) { + if (lseek (fd, -(BUF_SIZE / 2 + bytes_read), SEEK_CUR) == -1) { endwin(); - fprintf(stderr, - "\nError moving file pointer" - " in back_lines().\n"); + fprintf(stderr, "\nError moving file pointer" + " in back_lines().\n"); exit(-1); } page = buf + BUF_SIZE / 2; @@ -437,9 +412,8 @@ static void back_lines(int n) if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) { endwin(); - fprintf(stderr, - "\nError reading file in " - "back_lines().\n"); + fprintf(stderr, "\nError reading file in " + "back_lines().\n"); exit(-1); } buf[bytes_read] = '\0'; @@ -513,9 +487,8 @@ static char *get_line(void) /* 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"); + fprintf(stderr, "\nError moving file pointer in " + "get_line().\n"); exit(-1); } if (fpos < file_size) { /* Not end of file yet */ @@ -524,8 +497,7 @@ static char *get_line(void) if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) { endwin(); - fprintf(stderr, - "\nError reading file in get_line().\n"); + fprintf(stderr, "\nError reading file in get_line().\n"); exit(-1); } buf[bytes_read] = '\0'; @@ -561,8 +533,7 @@ static void print_position(WINDOW * win, int height, int width) if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) { endwin(); - fprintf(stderr, - "\nError moving file pointer in print_position().\n"); + fprintf(stderr, "\nError moving file pointer in print_position().\n"); exit(-1); } wattrset(win, position_indicator_attr); -- cgit From fa7009d5b59b8acd8071f7b3057d36eeeaf08146 Mon Sep 17 00:00:00 2001 From: Sam Ravnborg Date: Sat, 19 Nov 2005 23:38:06 +0100 Subject: kconfig: Add print_title helper in lxdialog Simplify check for long title and use a helper function in util.c Signed-off-by: Sam Ravnborg --- scripts/lxdialog/textbox.c | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-) (limited to 'scripts/lxdialog/textbox.c') diff --git a/scripts/lxdialog/textbox.c b/scripts/lxdialog/textbox.c index fa8d92ea02b6..77848bb8e07f 100644 --- a/scripts/lxdialog/textbox.c +++ b/scripts/lxdialog/textbox.c @@ -103,20 +103,8 @@ int dialog_textbox(const char *title, const char *file, int height, int width) wbkgdset(dialog, dialog_attr & A_COLOR); waddch(dialog, ACS_RTEE); - if (title != NULL && strlen(title) >= width - 2) { - /* truncate long title -- mec */ - char *title2 = malloc(width - 2 + 1); - memcpy(title2, title, width - 2); - title2[width - 2] = '\0'; - title = title2; - } + print_title(dialog, title, width); - if (title != NULL) { - wattrset(dialog, title_attr); - mvwaddch(dialog, 0, (width - strlen(title)) / 2 - 1, ' '); - waddstr(dialog, (char *)title); - waddch(dialog, ' '); - } print_button(dialog, " Exit ", height - 2, width / 2 - 4, TRUE); wnoutrefresh(dialog); getyx(dialog, cur_y, cur_x); /* Save cursor position */ -- cgit From 6f6046cff2e8f04d6b916b10ebaa7b40d7e7967a Mon Sep 17 00:00:00 2001 From: Sam Ravnborg Date: Fri, 16 Dec 2005 21:35:19 +0100 Subject: kconfig: move lxdialog to scripts/kconfig/lxdialog The only lxdialog user i kconfig - for menuconfig. So move it to reflect this. Signed-off-by: Sam Ravnborg --- scripts/lxdialog/textbox.c | 533 --------------------------------------------- 1 file changed, 533 deletions(-) delete mode 100644 scripts/lxdialog/textbox.c (limited to 'scripts/lxdialog/textbox.c') diff --git a/scripts/lxdialog/textbox.c b/scripts/lxdialog/textbox.c deleted file mode 100644 index 77848bb8e07f..000000000000 --- a/scripts/lxdialog/textbox.c +++ /dev/null @@ -1,533 +0,0 @@ -/* - * textbox.c -- implements the text box - * - * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk) - * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com) - * - * 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 char *get_line(void); -static void print_position(WINDOW * win, int height, int width); - -static int hscroll, fd, file_size, bytes_read; -static int begin_reached = 1, end_reached, page_length; -static char *buf, *page; - -/* - * Display text from a file in a dialog box. - */ -int dialog_textbox(const char *title, const char *file, int height, int width) -{ - int i, x, y, cur_x, cur_y, fpos, key = 0; - int passed_end; - char search_term[MAX_LEN + 1]; - 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; - - draw_shadow(stdscr, y, x, height, width); - - dialog = newwin(height, width, y, x); - keypad(dialog, TRUE); - - /* Create window for text region, used for scrolling text */ - text = subwin(dialog, height - 4, width - 2, y + 1, x + 1); - wattrset(text, dialog_attr); - wbkgdset(text, dialog_attr & A_COLOR); - - keypad(text, TRUE); - - /* register the new window, along with its borders */ - draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr); - - wattrset(dialog, border_attr); - mvwaddch(dialog, height - 3, 0, ACS_LTEE); - for (i = 0; i < width - 2; i++) - waddch(dialog, ACS_HLINE); - wattrset(dialog, dialog_attr); - wbkgdset(dialog, dialog_attr & A_COLOR); - waddch(dialog, ACS_RTEE); - - print_title(dialog, title, width); - - 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': - case 'X': - case 'x': - 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 */ - case KEY_END: - - 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); - - /* 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 first line of page */ - print_line(text, 0, width - 2); - wnoutrefresh(text); - } else - /* Called to update 'end_reached' and 'page' */ - get_line(); - if (!passed_end) - page_length++; - if (end_reached && !passed_end) - passed_end = 1; - } - - 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) - break; - back_lines(page_length + height - 4); - print_page(text, height - 4, width - 2); - print_position(dialog, height, width); - wmove(dialog, cur_y, cur_x); - 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); - wnoutrefresh(text); - print_position(dialog, height, width); - wmove(dialog, cur_y, cur_x); /* Restore cursor position */ - wrefresh(dialog); - } - break; - case KEY_NPAGE: /* Next page */ - case ' ': - if (end_reached) - break; - - begin_reached = 0; - print_page(text, height - 4, width - 2); - print_position(dialog, height, width); - wmove(dialog, cur_y, cur_x); - wrefresh(dialog); - break; - case '0': /* Beginning of line */ - case 'H': /* Scroll left */ - case 'h': - case KEY_LEFT: - if (hscroll <= 0) - break; - - 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); - wrefresh(dialog); - break; - case 'L': /* Scroll right */ - case 'l': - case KEY_RIGHT: - if (hscroll >= MAX_LEN) - break; - hscroll++; - /* Reprint current page to scroll horizontally */ - back_lines(page_length); - print_page(text, height - 4, width - 2); - wmove(dialog, cur_y, cur_x); - wrefresh(dialog); - break; - case ESC: - break; - } - } - - delwin(dialog); - free(buf); - close(fd); - return -1; /* ESC pressed */ -} - -/* - * 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++; -} - -/* - * 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); -} - -/* - * Print a new line of text. Called by dialog_textbox() and print_page(). - */ -static void print_line(WINDOW * win, int row, int width) -{ - int y, x; - char *line; - - line = get_line(); - line += MIN(strlen(line), hscroll); /* Scroll horizontally */ - wmove(win, row, 0); /* move cursor to correct line */ - waddch(win, ' '); - waddnstr(win, line, MIN(strlen(line), width - 2)); - - getyx(win, y, x); - /* Clear 'residue' of previous line */ -#if OLD_NCURSES - { - int i; - for (i = 0; i < width - x; i++) - waddch(win, ' '); - } -#else - wclrtoeol(win); -#endif -} - -/* - * 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 char *get_line(void) -{ - int i = 0, fpos; - static 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 { - /* Truncate lines longer than MAX_LEN characters */ - if (i == MAX_LEN) - line[i++] = '\0'; - page++; - } - } - if (i <= MAX_LEN) - line[i] = '\0'; - if (!end_reached) - page++; /* move pass '\n' */ - - return line; -} - -/* - * 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); - wbkgdset(win, position_indicator_attr & A_COLOR); - percent = !file_size ? - 100 : ((fpos - bytes_read + page - buf) * 100) / file_size; - wmove(win, height - 3, width - 9); - wprintw(win, "(%3d%%)", percent); -} -- cgit