diff options
Diffstat (limited to 'nx-X11/programs/xterm/tabs.c')
| -rw-r--r-- | nx-X11/programs/xterm/tabs.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/nx-X11/programs/xterm/tabs.c b/nx-X11/programs/xterm/tabs.c new file mode 100644 index 000000000..cfe91a0c3 --- /dev/null +++ b/nx-X11/programs/xterm/tabs.c @@ -0,0 +1,182 @@ +/* + * $XFree86: xc/programs/xterm/tabs.c,v 3.12 2005/04/22 00:21:54 dickey Exp $ + */ + +/* $Xorg: tabs.c,v 1.3 2000/08/17 19:55:09 cpqbld Exp $ */ + +/* + * Copyright 2000-2002,2005 by Thomas E. Dickey + * + * All Rights Reserved + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY + * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the name(s) of the above copyright + * holders shall not be used in advertising or otherwise to promote the + * sale, use or other dealings in this Software without prior written + * authorization. + * + * Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts. + * + * All Rights Reserved + * + * Permission to use, copy, modify, and distribute this software and its + * documentation for any purpose and without fee is hereby granted, + * provided that the above copyright notice appear in all copies and that + * both that copyright notice and this permission notice appear in + * supporting documentation, and that the name of Digital Equipment + * Corporation not be used in advertising or publicity pertaining to + * distribution of the software without specific, written prior permission. + * + * + * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING + * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL + * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR + * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, + * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, + * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS + * SOFTWARE. + */ + +/* tabs.c */ + +#include <xterm.h> +#include <data.h> + +/* + * This file presumes 32bits/word. This is somewhat of a crock, and should + * be fixed sometime. + */ +#define TAB_INDEX(n) ((n) >> 5) +#define TAB_MASK(n) (1 << ((n) & (TAB_BITS_WIDTH-1))) + +#define SET_TAB(tabs,n) tabs[TAB_INDEX(n)] |= TAB_MASK(n) +#define CLR_TAB(tabs,n) tabs[TAB_INDEX(n)] &= ~TAB_MASK(n) +#define TST_TAB(tabs,n) tabs[TAB_INDEX(n)] & TAB_MASK(n) + +/* + * places tabstops at only every 8 columns + */ +void +TabReset(Tabs tabs) +{ + int i; + + for (i = 0; i < TAB_ARRAY_SIZE; ++i) + tabs[i] = 0; + + for (i = 0; i < MAX_TABS; i += 8) + TabSet(tabs, i); +} + +/* + * places a tabstop at col + */ +void +TabSet(Tabs tabs, int col) +{ + SET_TAB(tabs, col); +} + +/* + * clears a tabstop at col + */ +void +TabClear(Tabs tabs, int col) +{ + CLR_TAB(tabs, col); +} + +/* + * returns the column of the next tabstop + * (or MAX_TABS - 1 if there are no more). + * A tabstop at col is ignored. + */ +static int +TabNext(TScreen * screen, Tabs tabs, int col) +{ + if (screen->curses && screen->do_wrap && (term->flags & WRAPAROUND)) { + xtermIndex(screen, 1); + set_cur_col(screen, 0); + col = screen->do_wrap = 0; + } + for (++col; col < MAX_TABS; ++col) + if (TST_TAB(tabs, col)) + return (col); + + return (MAX_TABS - 1); +} + +/* + * returns the column of the previous tabstop + * (or 0 if there are no more). + * A tabstop at col is ignored. + */ +static int +TabPrev(Tabs tabs, int col) +{ + for (--col; col >= 0; --col) + if (TST_TAB(tabs, col)) + return (col); + + return (0); +} + +/* + * Tab to the next stop, returning true if the cursor moved + */ +Bool +TabToNextStop(TScreen * screen) +{ + int saved_column = screen->cur_col; + int next = TabNext(screen, term->tabs, screen->cur_col); + int max = CurMaxCol(screen, screen->cur_row); + + if (next > max) + next = max; + set_cur_col(screen, next); + + return (screen->cur_col > saved_column); +} + +/* + * Tab to the previous stop, returning true if the cursor moved + */ +Bool +TabToPrevStop(TScreen * screen) +{ + int saved_column = screen->cur_col; + + set_cur_col(screen, TabPrev(term->tabs, screen->cur_col)); + + return (screen->cur_col < saved_column); +} + +/* + * clears all tabs + */ +void +TabZonk(Tabs tabs) +{ + int i; + + for (i = 0; i < TAB_ARRAY_SIZE; ++i) + tabs[i] = 0; +} |