diff options
| author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-04 16:36:52 -0800 | 
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-04 16:36:52 -0800 | 
| commit | 25c862cc9ea9b312c25a9f577f91b973131f1261 (patch) | |
| tree | 8e8f56531144370ced50fa98db2973f4e93e38b0 /scripts/lxdialog/textbox.c | |
| parent | 52347f4e810ba323d02cd2c26b5d738f4a2c3d5e (diff) | |
| parent | 8ded4ac018ea706bf7ee926601a27184665c9c28 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild
Diffstat (limited to 'scripts/lxdialog/textbox.c')
| -rw-r--r-- | scripts/lxdialog/textbox.c | 556 | 
1 files changed, 0 insertions, 556 deletions
diff --git a/scripts/lxdialog/textbox.c b/scripts/lxdialog/textbox.c deleted file mode 100644 index ed23df2d096a..000000000000 --- a/scripts/lxdialog/textbox.c +++ /dev/null @@ -1,556 +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); - -    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; -		} - -		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); -}  | 
