268 lines
10 KiB
Plaintext
268 lines
10 KiB
Plaintext
'\" t
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.\"***************************************************************************
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.\" Copyright (c) 1998-2005,2006 Free Software Foundation, Inc. *
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.\" *
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.\" Permission is hereby granted, free of charge, to any person obtaining a *
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.\" copy of this software and associated documentation files (the *
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.\" "Software"), to deal in the Software without restriction, including *
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.\" without limitation the rights to use, copy, modify, merge, publish, *
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.\" distribute, distribute with modifications, sublicense, and/or sell *
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.\" copies of the Software, and to permit persons to whom the Software is *
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.\" furnished to do so, subject to the following conditions: *
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.\" *
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.\" The above copyright notice and this permission notice shall be included *
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.\" in all copies or substantial portions of the Software. *
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.\" *
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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.\" *
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.\" Except as contained in this notice, the name(s) of the above copyright *
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.\" holders shall not be used in advertising or otherwise to promote the *
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.\" sale, use or other dealings in this Software without prior written *
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.\" authorization. *
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.\"***************************************************************************
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.\"
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.\" $Id: curs_attr.3x,v 1.30 2006/07/15 18:39:05 tom Exp $
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.TH curs_attr 3X ""
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.na
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.hy 0
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.SH NAME
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\fBattroff\fR,
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\fBwattroff\fR,
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\fBattron\fR,
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\fBwattron\fR,
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\fBattrset\fR,
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\fBwattrset\fR,
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\fBcolor_set\fR,
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\fBwcolor_set\fR,
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\fBstandend\fR,
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\fBwstandend\fR,
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\fBstandout\fR,
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\fBwstandout\fR,
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\fBattr_get\fR,
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\fBwattr_get\fR,
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\fBattr_off\fR,
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\fBwattr_off\fR,
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\fBattr_on\fR,
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\fBwattr_on\fR,
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\fBattr_set\fR,
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\fBwattr_set\fR,
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\fBchgat\fR,
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\fBwchgat\fR,
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\fBmvchgat\fR,
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\fBmvwchgat\fR,
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\fBPAIR_NUMBER\fR - \fBcurses\fR character and window attribute control routines
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.ad
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.hy
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.SH SYNOPSIS
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\fB#include <curses.h>\fR
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.br
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\fBint attroff(int attrs);\fR
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.br
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\fBint wattroff(WINDOW *win, int attrs);\fR
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.br
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\fBint attron(int attrs);\fR
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.br
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\fBint wattron(WINDOW *win, int attrs);\fR
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.br
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\fBint attrset(int attrs);\fR
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.br
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\fBint wattrset(WINDOW *win, int attrs);\fR
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.br
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\fBint color_set(short color_pair_number, void* opts);\fR
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.br
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\fBint wcolor_set(WINDOW *win, short color_pair_number,\fR
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\fBvoid* opts);\fR
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.br
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\fBint standend(void);\fR
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.br
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\fBint wstandend(WINDOW *win);\fR
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.br
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\fBint standout(void);\fR
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.br
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\fBint wstandout(WINDOW *win);\fR
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.br
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\fBint attr_get(attr_t *attrs, short *pair, void *opts);\fR
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.br
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\fBint wattr_get(WINDOW *win, attr_t *attrs, short *pair,\fR
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\fBvoid *opts);\fR
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.br
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\fBint attr_off(attr_t attrs, void *opts);\fR
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.br
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\fBint wattr_off(WINDOW *win, attr_t attrs, void *opts);\fR
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.br
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\fBint attr_on(attr_t attrs, void *opts);\fR
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.br
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\fBint wattr_on(WINDOW *win, attr_t attrs, void *opts);\fR
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.br
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\fBint attr_set(attr_t attrs, short pair, void *opts);\fR
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.br
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\fBint wattr_set(WINDOW *win, attr_t attrs, short pair, void *opts);\fR
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.br
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\fBint chgat(int n, attr_t attr, short color,\fR
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\fBconst void *opts)\fR
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.br
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\fBint wchgat(WINDOW *win, int n, attr_t attr,\fR
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\fBshort color, const void *opts)\fR
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.br
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\fBint mvchgat(int y, int x, int n, attr_t attr,\fR
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\fBshort color, const void *opts)\fR
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.br
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\fBint mvwchgat(WINDOW *win, int y, int x, int n,\fR
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\fBattr_t attr, short color, const void *opts)\fR
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.br
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.SH DESCRIPTION
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These routines manipulate the current attributes of the named window. The
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current attributes of a window apply to all characters that are written into
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the window with \fBwaddch\fR, \fBwaddstr\fR and \fBwprintw\fR. Attributes are
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a property of the character, and move with the character through any scrolling
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and insert/delete line/character operations. To the extent possible, they are
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displayed as appropriate modifications to the graphic rendition of characters
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put on the screen.
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.PP
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The routine \fBattrset\fR sets the current attributes of the given window to
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\fIattrs\fR. The routine \fBattroff\fR turns off the named attributes without
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turning any other attributes on or off. The routine \fBattron\fR turns on the
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named attributes without affecting any others. The routine \fBstandout\fR is
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the same as \fBattron(A_STANDOUT)\fR. The routine \fBstandend\fR is the same
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as \fBattrset(A_NORMAL)\fR or \fBattrset(0)\fR, that is, it turns off all
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attributes.
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.PP
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The \fBattrset\fR and related routines do not affect the attributes used
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when erasing portions of the window.
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See \fBcurs_bkgd\fR(3X) for functions which modify the attributes used for
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erasing and clearing.
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.PP
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The routine \fBcolor_set\fR sets the current color of the given window to the
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foreground/background combination described by the color_pair_number. The
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parameter opts is reserved for future use, applications must supply a null
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pointer.
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.PP
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The routine \fBwattr_get\fR returns the current attribute and color pair for
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the given window; \fBattr_get\fR returns the current attribute and color pair
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for \fBstdscr\fR.
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The remaining \fBattr_\fR* functions operate exactly like the corresponding
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\fBattr\fR* functions, except that they take arguments of type \fBattr_t\fR
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rather than \fBint\fR.
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.PP
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The routine \fBchgat\fR changes the attributes of a given number of characters
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starting at the current cursor location of \fBstdscr\fR. It does not update
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the cursor and does not perform wrapping. A character count of -1 or greater
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than the remaining window width means to change attributes all the way to the
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end of the current line. The \fBwchgat\fR function generalizes this to any
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window; the \fBmvwchgat\fR function does a cursor move before acting. In these
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functions, the color argument is a color-pair index (as in the first argument
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of \fIinit_pair\fR, see \fBcurs_color\fR(3X)). The \fBopts\fR argument is not
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presently used, but is reserved for the future (leave it \fBNULL\fR).
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.SS Attributes
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The following video attributes, defined in \fB<curses.h>\fR, can be passed to
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the routines \fBattron\fR, \fBattroff\fR, and \fBattrset\fR, or OR'd with the
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characters passed to \fBaddch\fR.
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.PP
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.TS
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center ;
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l l .
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\fBA_NORMAL\fR Normal display (no highlight)
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\fBA_STANDOUT\fR Best highlighting mode of the terminal.
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\fBA_UNDERLINE\fR Underlining
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\fBA_REVERSE\fR Reverse video
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\fBA_BLINK\fR Blinking
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\fBA_DIM\fR Half bright
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\fBA_BOLD\fR Extra bright or bold
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\fBA_PROTECT\fR Protected mode
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\fBA_INVIS\fR Invisible or blank mode
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\fBA_ALTCHARSET\fR Alternate character set
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\fBA_CHARTEXT\fR Bit-mask to extract a character
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\fBCOLOR_PAIR(\fR\fIn\fR\fB)\fR Color-pair number \fIn\fR
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.TE
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.PP
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The following macro is the reverse of \fBCOLOR_PAIR(\fR\fIn\fR\fB)\fR:
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.PP
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.br
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\fBPAIR_NUMBER(\fR\fIattrs\fR) Returns the pair number associated
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with the \fBCOLOR_PAIR(\fR\fIn\fR\fB)\fR attribute.
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.br
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.PP
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The return values of many of these routines are not meaningful (they are
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implemented as macro-expanded assignments and simply return their argument).
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The SVr4 manual page claims (falsely) that these routines always return \fB1\fR.
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.SH NOTES
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Note that \fBattroff\fR, \fBwattroff\fR, \fBattron\fR, \fBwattron\fR,
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\fBattrset\fR, \fBwattrset\fR, \fBstandend\fR and \fBstandout\fR may be macros.
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.PP
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\fBCOLOR_PAIR\fP values can only be OR'd with attributes if the pair
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number is less than 256.
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The alternate functions such as \fBcolor_set\fP can pass a color pair
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value directly.
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However, ncurses ABI 4 and 5 simply OR this value within the alternate functions.
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You must use ncurses ABI 6 to support more than 256 color pairs.
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.SH PORTABILITY
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These functions are supported in the XSI Curses standard, Issue 4. The
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standard defined the dedicated type for highlights, \fBattr_t\fR, which is not
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defined in SVr4 curses. The functions taking \fBattr_t\fR arguments are
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not supported under SVr4.
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.PP
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The XSI Curses standard states that whether the traditional functions
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\fBattron\fR/\fBattroff\fR/\fBattrset\fR can manipulate attributes other than
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\fBA_BLINK\fR, \fBA_BOLD\fR, \fBA_DIM\fR, \fBA_REVERSE\fR, \fBA_STANDOUT\fR, or
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\fBA_UNDERLINE\fR is "unspecified". Under this implementation as well as
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SVr4 curses, these functions correctly manipulate all other highlights
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(specifically, \fBA_ALTCHARSET\fR, \fBA_PROTECT\fR, and \fBA_INVIS\fR).
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.PP
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XSI Curses added the new entry points, \fBattr_get\fR, \fBattr_on\fR,
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\fBattr_off\fR, \fBattr_set\fR, \fBwattr_on\fR, \fBwattr_off\fR,
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\fBwattr_get\fR, \fBwattr_set\fR. These are intended to work with
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a new series of highlight macros prefixed with \fBWA_\fR.
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.PP
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Older versions of this library did not force an update of the screen
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when changing the attributes.
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Use \fBtouchwin\fR to force the screen to match the updated attributes.
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.PP
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.TS
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center ;
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l l .
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\fBWA_NORMAL\fR Normal display (no highlight)
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\fBWA_STANDOUT\fR Best highlighting mode of the terminal.
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\fBWA_UNDERLINE\fR Underlining
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\fBWA_REVERSE\fR Reverse video
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\fBWA_BLINK\fR Blinking
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\fBWA_DIM\fR Half bright
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\fBWA_BOLD\fR Extra bright or bold
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\fBWA_ALTCHARSET\fR Alternate character set
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.TE
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.PP
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The XSI curses standard specifies that each pair of corresponding \fBA_\fR
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and \fBWA_\fR-using functions operates on the same current-highlight
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information.
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.PP
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The XSI standard extended conformance level adds new highlights
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\fBA_HORIZONTAL\fR, \fBA_LEFT\fR, \fBA_LOW\fR, \fBA_RIGHT\fR, \fBA_TOP\fR,
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\fBA_VERTICAL\fR (and corresponding \fBWA_\fR macros for each) which this
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implementation does not yet support.
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.SH RETURN VALUE
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All routines return the integer \fBOK\fR on success, or \fBERR\fP on failure.
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.PP
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X/Open does not define any error conditions.
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.PP
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This implementation returns an error
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if the window pointer is null.
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The \fBwcolor_set\fP function returns an error if the color pair parameter
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is outside the range 0..COLOR_PAIRS-1.
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.SH SEE ALSO
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\fBcurses\fR(3X),
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\fBcurs_addch\fR(3X),
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\fBcurs_addstr\fR(3X),
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\fBcurs_bkgd\fR(3X),
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\fBcurs_printw\fR(3X)
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.\"#
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.\"# The following sets edit modes for GNU EMACS
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.\"# Local Variables:
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.\"# mode:nroff
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.\"# fill-column:79
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.\"# End:
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