diff options
Diffstat (limited to 'ncurses-5.3/ncurses/base/lib_addch.c')
| -rw-r--r-- | ncurses-5.3/ncurses/base/lib_addch.c | 365 |
1 files changed, 365 insertions, 0 deletions
diff --git a/ncurses-5.3/ncurses/base/lib_addch.c b/ncurses-5.3/ncurses/base/lib_addch.c new file mode 100644 index 0000000..ec43b98 --- /dev/null +++ b/ncurses-5.3/ncurses/base/lib_addch.c @@ -0,0 +1,365 @@ +/**************************************************************************** + * Copyright (c) 1998-2001,2002 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. * + ****************************************************************************/ + +/* +** lib_addch.c +** +** The routine waddch(). +** +*/ + +#include <curses.priv.h> +#include <ctype.h> + +MODULE_ID("$Id$") + +/* + * Ugly microtweaking alert. Everything from here to end of module is + * likely to be speed-critical -- profiling data sure says it is! + * Most of the important screen-painting functions are shells around + * waddch(). So we make every effort to reduce function-call overhead + * by inlining stuff, even at the cost of making wrapped copies for + * export. Also we supply some internal versions that don't call the + * window sync hook, for use by string-put functions. + */ + +/* Return bit mask for clearing color pair number if given ch has color */ +#define COLOR_MASK(ch) (~(attr_t)((ch)&A_COLOR?A_COLOR:0)) + +static inline NCURSES_CH_T +render_char(WINDOW *win, NCURSES_CH_T ch) +/* compute a rendition of the given char correct for the current context */ +{ + attr_t a = win->_attrs; + + if (ISBLANK(ch) && AttrOf(ch) == A_NORMAL) { + /* color in attrs has precedence over bkgrnd */ + ch = win->_nc_bkgd; + SetAttr(ch, a | (AttrOf(win->_nc_bkgd) & COLOR_MASK(a))); + } else { + /* color in attrs has precedence over bkgrnd */ + a |= AttrOf(win->_nc_bkgd) & COLOR_MASK(a); + /* color in ch has precedence */ + AddAttr(ch, (a & COLOR_MASK(AttrOf(ch)))); + } + + TR(TRACE_VIRTPUT, ("bkg = %s, attrs = %s -> ch = %s", + _tracech_t2(1, CHREF(win->_nc_bkgd)), + _traceattr(win->_attrs), + _tracech_t2(3, CHREF(ch)))); + + return (ch); +} + +NCURSES_EXPORT(NCURSES_CH_T) +_nc_render(WINDOW *win, NCURSES_CH_T ch) +/* make render_char() visible while still allowing us to inline it below */ +{ + return render_char(win, ch); +} + +/* check if position is legal; if not, return error */ +#ifndef NDEBUG /* treat this like an assertion */ +#define CHECK_POSITION(win, x, y) \ + if (y > win->_maxy \ + || x > win->_maxx \ + || y < 0 \ + || x < 0) { \ + TR(TRACE_VIRTPUT, ("Alert! Win=%p _curx = %d, _cury = %d " \ + "(_maxx = %d, _maxy = %d)", win, x, y, \ + win->_maxx, win->_maxy)); \ + return(ERR); \ + } +#else +#define CHECK_POSITION(win, x, y) /* nothing */ +#endif + +static inline int +waddch_literal(WINDOW *win, NCURSES_CH_T ch) +{ + int x; + struct ldat *line; + + x = win->_curx; + + CHECK_POSITION(win, x, win->_cury); + + /* + * If we're trying to add a character at the lower-right corner more + * than once, fail. (Moving the cursor will clear the flag). + */ +#if 0 /* Solaris 2.6 allows updating the corner more than once */ + if (win->_flags & _WRAPPED) { + if (x >= win->_maxx) + return (ERR); + win->_flags &= ~_WRAPPED; + } +#endif + + ch = render_char(win, ch); + TR(TRACE_VIRTPUT, ("win attr = %s", _traceattr(win->_attrs))); + + line = win->_line + win->_cury; + + CHANGED_CELL(line, x); + + /* + * Handle non-spacing characters + */ + if_WIDEC({ + if (wcwidth(CharOf(ch)) == 0) { + int i; + int y; + if ((x > 0 && ((y = win->_cury) >= 0)) + || ((y = win->_cury - 1) >= 0 && + (x = win->_maxx) > 0)) { + wchar_t *chars = (win->_line[y].text[x - 1].chars); + for (i = 0; i < CCHARW_MAX; ++i) { + if (chars[i] == 0) { + chars[i] = CharOf(ch); + break; + } + } + } + goto testwrapping; + } + }); + line->text[x++] = ch; + /* + * Provide for multi-column characters + */ + if_WIDEC({ + if (wcwidth(CharOf(ch)) > 1) + AddAttr(line->text[x++], WA_NAC); + } + testwrapping: + ); + + TR(TRACE_VIRTPUT, ("(%d, %d) = %s", win->_cury, x, _tracech_t(CHREF(ch)))); + if (x > win->_maxx) { + /* + * The _WRAPPED flag is useful only for telling an application that + * we've just wrapped the cursor. We don't do anything with this flag + * except set it when wrapping, and clear it whenever we move the + * cursor. If we try to wrap at the lower-right corner of a window, we + * cannot move the cursor (since that wouldn't be legal). So we return + * an error (which is what SVr4 does). Unlike SVr4, we can + * successfully add a character to the lower-right corner (Solaris 2.6 + * does this also, however). + */ + win->_flags |= _WRAPPED; + if (++win->_cury > win->_regbottom) { + win->_cury = win->_regbottom; + win->_curx = win->_maxx; + if (!win->_scroll) + return (ERR); + scroll(win); + } + win->_curx = 0; + return (OK); + } + win->_curx = x; + return OK; +} + +static inline int +waddch_nosync(WINDOW *win, const NCURSES_CH_T ch) +/* the workhorse function -- add a character to the given window */ +{ + int x, y; + chtype t = 0; + const char *s = 0; + + if ((AttrOf(ch) & A_ALTCHARSET) + || ((t = CharOf(ch)) > 127) + || ((s = unctrl(t))[1] == 0)) + return waddch_literal(win, ch); + + x = win->_curx; + y = win->_cury; + + switch (t) { + case '\t': + x += (TABSIZE - (x % TABSIZE)); + + /* + * Space-fill the tab on the bottom line so that we'll get the + * "correct" cursor position. + */ + if ((!win->_scroll && (y == win->_regbottom)) + || (x <= win->_maxx)) { + NCURSES_CH_T blank = NewChar2(BLANK_TEXT, BLANK_ATTR); + AddAttr(blank, AttrOf(ch)); + while (win->_curx < x) { + if (waddch_literal(win, blank) == ERR) + return (ERR); + } + break; + } else { + wclrtoeol(win); + win->_flags |= _WRAPPED; + if (++y > win->_regbottom) { + x = win->_maxx; + y--; + if (win->_scroll) { + scroll(win); + x = 0; + } + } else { + x = 0; + } + } + break; + case '\n': + wclrtoeol(win); + if (++y > win->_regbottom) { + y--; + if (win->_scroll) + scroll(win); + else + return (ERR); + } + /* FALLTHRU */ + case '\r': + x = 0; + win->_flags &= ~_WRAPPED; + break; + case '\b': + if (x == 0) + return (OK); + x--; + win->_flags &= ~_WRAPPED; + break; + default: + while (*s) { + NCURSES_CH_T sch; + SetChar(sch, *s++, AttrOf(ch)); + if (waddch_literal(win, sch) == ERR) + return ERR; + } + return (OK); + } + + win->_curx = x; + win->_cury = y; + + return (OK); +} + +NCURSES_EXPORT(int) +_nc_waddch_nosync(WINDOW *win, const NCURSES_CH_T c) +/* export copy of waddch_nosync() so the string-put functions can use it */ +{ + return (waddch_nosync(win, c)); +} + +/* + * The versions below call _nc_synhook(). We wanted to avoid this in the + * version exported for string puts; they'll call _nc_synchook once at end + * of run. + */ + +/* These are actual entry points */ + +NCURSES_EXPORT(int) +waddch(WINDOW *win, const chtype ch) +{ + int code = ERR; + NCURSES_CH_T wch; + SetChar2(wch, ch); + + TR(TRACE_VIRTPUT | TRACE_CCALLS, (T_CALLED("waddch(%p, %s)"), win, + _tracechtype(ch))); + + if (win && (waddch_nosync(win, wch) != ERR)) { + _nc_synchook(win); + code = OK; + } + + TR(TRACE_VIRTPUT | TRACE_CCALLS, (T_RETURN("%d"), code)); + return (code); +} + +NCURSES_EXPORT(int) +wechochar(WINDOW *win, const chtype ch) +{ + int code = ERR; + NCURSES_CH_T wch; + SetChar2(wch, ch); + + TR(TRACE_VIRTPUT | TRACE_CCALLS, (T_CALLED("wechochar(%p, %s)"), win, + _tracechtype(ch))); + + if (win && (waddch_nosync(win, wch) != ERR)) { + bool save_immed = win->_immed; + win->_immed = TRUE; + _nc_synchook(win); + win->_immed = save_immed; + code = OK; + } + TR(TRACE_VIRTPUT | TRACE_CCALLS, (T_RETURN("%d"), code)); + return (code); +} + +#if USE_WIDEC_SUPPORT +NCURSES_EXPORT(int) +wadd_wch(WINDOW *win, const cchar_t * wch) +{ + int code = ERR; + + TR(TRACE_VIRTPUT | TRACE_CCALLS, (T_CALLED("wadd_wch(%p, %s)"), win, + _tracech_t(wch))); + + if (win && (waddch_nosync(win, *wch) != ERR)) { + _nc_synchook(win); + code = OK; + } + + TR(TRACE_VIRTPUT | TRACE_CCALLS, (T_RETURN("%d"), code)); + return (code); +} + +NCURSES_EXPORT(int) +wecho_wchar(WINDOW *win, const cchar_t * wch) +{ + int code = ERR; + + TR(TRACE_VIRTPUT | TRACE_CCALLS, (T_CALLED("wecho_wchar(%p, %s)"), win, + _tracech_t(wch))); + + if (win && (waddch_nosync(win, *wch) != ERR)) { + bool save_immed = win->_immed; + win->_immed = TRUE; + _nc_synchook(win); + win->_immed = save_immed; + code = OK; + } + TR(TRACE_VIRTPUT | TRACE_CCALLS, (T_RETURN("%d"), code)); + return (code); +} +#endif /* USE_WIDEC_SUPPORT */ |