/* $OpenBSD: lib_vidattr.c,v 1.9 2010/01/12 23:22:07 nicm Exp $ */ /**************************************************************************** * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc. * * * * 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, distribute with modifications, 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 COPYRIGHT HOLDERS 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. * ****************************************************************************/ /**************************************************************************** * Author: Zeyd M. Ben-Halim 1992,1995 * * and: Eric S. Raymond * * and: Thomas E. Dickey 1996 on * ****************************************************************************/ /* * vidputs(newmode, outc) * * newmode is taken to be the logical 'or' of the symbols in curses.h * representing graphic renditions. The terminal is set to be in all of * the given modes, if possible. * * if the new attribute is normal * if exit-alt-char-set exists * emit it * emit exit-attribute-mode * else if set-attributes exists * use it to set exactly what you want * else * if exit-attribute-mode exists * turn off everything * else * turn off those which can be turned off and aren't in * newmode. * turn on each mode which should be on and isn't, one by one * * NOTE that this algorithm won't achieve the desired mix of attributes * in some cases, but those are probably just those cases in which it is * actually impossible, anyway, so... * * NOTE that we cannot assume that there's no interaction between color * and other attribute resets. So each time we reset color (or other * attributes) we'll have to be prepared to restore the other. */ #include #include MODULE_ID("$Id: lib_vidattr.c,v 1.9 2010/01/12 23:22:07 nicm Exp $") #define doPut(mode) TPUTS_TRACE(#mode); tputs(mode, 1, outc) #define TurnOn(mask,mode) \ if ((turn_on & mask) && mode) { doPut(mode); } #define TurnOff(mask,mode) \ if ((turn_off & mask) && mode) { doPut(mode); turn_off &= ~mask; } /* if there is no current screen, assume we *can* do color */ #define SetColorsIf(why,old_attr) \ if (can_color && (why)) { \ int old_pair = PAIR_NUMBER(old_attr); \ TR(TRACE_ATTRS, ("old pair = %d -- new pair = %d", old_pair, pair)); \ if ((pair != old_pair) \ || (fix_pair0 && (pair == 0)) \ || (reverse ^ ((old_attr & A_REVERSE) != 0))) { \ _nc_do_color(old_pair, pair, reverse, outc); \ } \ } #define PreviousAttr _nc_prescreen.previous_attr NCURSES_EXPORT(int) vidputs(chtype newmode, int (*outc) (int)) { attr_t turn_on, turn_off; int pair; bool reverse = FALSE; bool can_color = (SP == 0 || SP->_coloron); #if NCURSES_EXT_FUNCS bool fix_pair0 = (SP != 0 && SP->_coloron && !SP->_default_color); #else #define fix_pair0 FALSE #endif newmode &= A_ATTRIBUTES; T((T_CALLED("vidputs(%s)"), _traceattr(newmode))); /* this allows us to go on whether or not newterm() has been called */ if (SP) PreviousAttr = AttrOf(SCREEN_ATTRS(SP)); TR(TRACE_ATTRS, ("previous attribute was %s", _traceattr(PreviousAttr))); if ((SP != 0) && (magic_cookie_glitch > 0)) { #if USE_XMC_SUPPORT static const chtype table[] = { A_STANDOUT, A_UNDERLINE, A_REVERSE, A_BLINK, A_DIM, A_BOLD, A_INVIS, A_PROTECT, }; unsigned n; int used = 0; int limit = (max_attributes <= 0) ? 1 : max_attributes; chtype retain = 0; /* * Limit the number of attribute bits set in the newmode according to * the terminfo max_attributes value. */ for (n = 0; n < SIZEOF(table); ++n) { if ((table[n] & SP->_ok_attributes) == 0) { newmode &= ~table[n]; } else if ((table[n] & newmode) != 0) { if (used++ >= limit) { newmode &= ~table[n]; if (newmode == retain) break; } else { retain = newmode; } } } #else newmode &= ~(SP->_xmc_suppress); #endif TR(TRACE_ATTRS, ("suppressed attribute is %s", _traceattr(newmode))); } /* * If we have a terminal that cannot combine color with video * attributes, use the colors in preference. */ if (((newmode & A_COLOR) != 0 || fix_pair0) && (no_color_video > 0)) { /* * If we had chosen the A_xxx definitions to correspond to the * no_color_video mask, we could simply shift it up and mask off the * attributes. But we did not (actually copied Solaris' definitions). * However, this is still simpler/faster than a lookup table. * * The 63 corresponds to A_STANDOUT, A_UNDERLINE, A_REVERSE, A_BLINK, * A_DIM, A_BOLD which are 1:1 with no_color_video. The bits that * correspond to A_INVIS, A_PROTECT (192) must be shifted up 1 and * A_ALTCHARSET (256) down 2 to line up. We use the NCURSES_BITS * macro so this will work properly for the wide-character layout. */ unsigned value = no_color_video; attr_t mask = NCURSES_BITS((value & 63) | ((value & 192) << 1) | ((value & 256) >> 2), 8); if ((mask & A_REVERSE) != 0 && (newmode & A_REVERSE) != 0) { reverse = TRUE; mask &= ~A_REVERSE; } newmode &= ~mask; } if (newmode == PreviousAttr) returnCode(OK); pair = PAIR_NUMBER(newmode); if (reverse) { newmode &= ~A_REVERSE; } turn_off = (~newmode & PreviousAttr) & ALL_BUT_COLOR; turn_on = (newmode & ~PreviousAttr) & ALL_BUT_COLOR; SetColorsIf(((pair == 0) && !fix_pair0), PreviousAttr); if (newmode == A_NORMAL) { if ((PreviousAttr & A_ALTCHARSET) && exit_alt_charset_mode) { doPut(exit_alt_charset_mode); PreviousAttr &= ~A_ALTCHARSET; } if (PreviousAttr) { if (exit_attribute_mode) { doPut(exit_attribute_mode); } else { if (!SP || SP->_use_rmul) { TurnOff(A_UNDERLINE, exit_underline_mode); } if (!SP || SP->_use_rmso) { TurnOff(A_STANDOUT, exit_standout_mode); } } PreviousAttr &= ALL_BUT_COLOR; } SetColorsIf((pair != 0) || fix_pair0, PreviousAttr); } else if (set_attributes) { if (turn_on || turn_off) { TPUTS_TRACE("set_attributes"); tputs(tparm(set_attributes, (newmode & A_STANDOUT) != 0, (newmode & A_UNDERLINE) != 0, (newmode & A_REVERSE) != 0, (newmode & A_BLINK) != 0, (newmode & A_DIM) != 0, (newmode & A_BOLD) != 0, (newmode & A_INVIS) != 0, (newmode & A_PROTECT) != 0, (newmode & A_ALTCHARSET) != 0), 1, outc); PreviousAttr &= ALL_BUT_COLOR; } SetColorsIf((pair != 0) || fix_pair0, PreviousAttr); } else { TR(TRACE_ATTRS, ("turning %s off", _traceattr(turn_off))); TurnOff(A_ALTCHARSET, exit_alt_charset_mode); if (!SP || SP->_use_rmul) { TurnOff(A_UNDERLINE, exit_underline_mode); } if (!SP || SP->_use_rmso) { TurnOff(A_STANDOUT, exit_standout_mode); } if (turn_off && exit_attribute_mode) { doPut(exit_attribute_mode); turn_on |= (newmode & ALL_BUT_COLOR); PreviousAttr &= ALL_BUT_COLOR; } SetColorsIf((pair != 0) || fix_pair0, PreviousAttr); TR(TRACE_ATTRS, ("turning %s on", _traceattr(turn_on))); /* *INDENT-OFF* */ TurnOn(A_ALTCHARSET, enter_alt_charset_mode); TurnOn(A_BLINK, enter_blink_mode); TurnOn(A_BOLD, enter_bold_mode); TurnOn(A_DIM, enter_dim_mode); TurnOn(A_REVERSE, enter_reverse_mode); TurnOn(A_STANDOUT, enter_standout_mode); TurnOn(A_PROTECT, enter_protected_mode); TurnOn(A_INVIS, enter_secure_mode); TurnOn(A_UNDERLINE, enter_underline_mode); #if USE_WIDEC_SUPPORT TurnOn(A_HORIZONTAL, enter_horizontal_hl_mode); TurnOn(A_LEFT, enter_left_hl_mode); TurnOn(A_LOW, enter_low_hl_mode); TurnOn(A_RIGHT, enter_right_hl_mode); TurnOn(A_TOP, enter_top_hl_mode); TurnOn(A_VERTICAL, enter_vertical_hl_mode); #endif /* *INDENT-ON* */ } if (reverse) newmode |= A_REVERSE; if (SP) SetAttr(SCREEN_ATTRS(SP), newmode); else PreviousAttr = newmode; returnCode(OK); } NCURSES_EXPORT(int) vidattr(chtype newmode) { T((T_CALLED("vidattr(%s)"), _traceattr(newmode))); returnCode(vidputs(newmode, _nc_outch)); } NCURSES_EXPORT(chtype) termattrs(void) { chtype attrs = A_NORMAL; T((T_CALLED("termattrs()"))); if (enter_alt_charset_mode) attrs |= A_ALTCHARSET; if (enter_blink_mode) attrs |= A_BLINK; if (enter_bold_mode) attrs |= A_BOLD; if (enter_dim_mode) attrs |= A_DIM; if (enter_reverse_mode) attrs |= A_REVERSE; if (enter_standout_mode) attrs |= A_STANDOUT; if (enter_protected_mode) attrs |= A_PROTECT; if (enter_secure_mode) attrs |= A_INVIS; if (enter_underline_mode) attrs |= A_UNDERLINE; if (SP->_coloron) attrs |= A_COLOR; returnChar(attrs); }