/****************************************************************************
- * Copyright (c) 2004,2006 Free Software Foundation, Inc. *
+ * Copyright (c) 2004-2006,2009 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 *
#include <curses.priv.h>
-MODULE_ID("$Id: lib_add_wch.c,v 1.6 2006/12/02 21:19:17 tom Exp $")
+#if HAVE_WCTYPE_H
+#include <wctype.h>
+#endif
-NCURSES_EXPORT(int)
-wadd_wch(WINDOW *win, const cchar_t *wch)
+MODULE_ID("$Id: lib_add_wch.c,v 1.9 2009/10/24 22:45:42 tom Exp $")
+
+/* clone/adapt lib_addch.c */
+static const cchar_t blankchar = NewChar(BLANK_TEXT);
+
+/*
+ * 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
+ * wadd_wch(). 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 NCURSES_INLINE cchar_t
+render_char(WINDOW *win, cchar_t ch)
+/* compute a rendition of the given char correct for the current context */
{
- PUTC_DATA;
- int n;
- int code = ERR;
+ attr_t a = WINDOW_ATTRS(win);
+ int pair = GetPair(ch);
+
+ if (ISBLANK(ch)
+ && AttrOf(ch) == A_NORMAL
+ && pair == 0) {
+ /* color/pair in attrs has precedence over bkgrnd */
+ ch = win->_nc_bkgd;
+ SetAttr(ch, a | AttrOf(win->_nc_bkgd));
+ if ((pair = GET_WINDOW_PAIR(win)) == 0)
+ pair = GetPair(win->_nc_bkgd);
+ SetPair(ch, pair);
+ } else {
+ /* color in attrs has precedence over bkgrnd */
+ a |= AttrOf(win->_nc_bkgd) & COLOR_MASK(a);
+ /* color in ch has precedence */
+ if (pair == 0) {
+ if ((pair = GET_WINDOW_PAIR(win)) == 0)
+ pair = GetPair(win->_nc_bkgd);
+ }
+#if 0
+ if (pair > 255) {
+ cchar_t fixme = ch;
+ SetPair(fixme, pair);
+ }
+#endif
+ AddAttr(ch, (a & COLOR_MASK(AttrOf(ch))));
+ SetPair(ch, pair);
+ }
+
+ TR(TRACE_VIRTPUT,
+ ("render_char bkg %s (%d), attrs %s (%d) -> ch %s (%d)",
+ _tracech_t2(1, CHREF(win->_nc_bkgd)),
+ GetPair(win->_nc_bkgd),
+ _traceattr(WINDOW_ATTRS(win)),
+ GET_WINDOW_PAIR(win),
+ _tracech_t2(3, CHREF(ch)),
+ GetPair(ch)));
+
+ return (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 bool
+newline_forces_scroll(WINDOW *win, NCURSES_SIZE_T * ypos)
+{
+ bool result = FALSE;
+
+ if (*ypos >= win->_regtop && *ypos == win->_regbottom) {
+ *ypos = win->_regbottom;
+ result = TRUE;
+ } else {
+ *ypos += 1;
+ }
+ return result;
+}
+
+/*
+ * 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).
+ */
+static int
+wrap_to_next_line(WINDOW *win)
+{
+ win->_flags |= _WRAPPED;
+ if (newline_forces_scroll(win, &(win->_cury))) {
+ win->_curx = win->_maxx;
+ if (!win->_scroll)
+ return (ERR);
+ scroll(win);
+ }
+ win->_curx = 0;
+ return (OK);
+}
- TR(TRACE_VIRTPUT | TRACE_CCALLS, (T_CALLED("wadd_wch(%p, %s)"), win,
- _tracech_t(wch)));
-
- if (win != 0) {
- PUTC_INIT;
- for (PUTC_i = 0; PUTC_i < CCHARW_MAX; ++PUTC_i) {
- attr_t attrs = (wch->attr & A_ATTRIBUTES);
-
- if ((PUTC_ch = wch->chars[PUTC_i]) == L'\0')
- break;
- if ((PUTC_n = wcrtomb(PUTC_buf, PUTC_ch, &PUT_st)) <= 0) {
- code = ERR;
- if (is8bits(PUTC_ch))
- code = waddch(win, UChar(PUTC_ch) | attrs);
- break;
+static int wadd_wch_literal(WINDOW *, cchar_t);
+/*
+ * Fill the given number of cells with blanks using the current background
+ * rendition. This saves/restores the current x-position.
+ */
+static void
+fill_cells(WINDOW *win, int count)
+{
+ cchar_t blank = blankchar;
+ int save_x = win->_curx;
+ int save_y = win->_cury;
+
+ while (count-- > 0) {
+ if (wadd_wch_literal(win, blank) == ERR)
+ break;
+ }
+ win->_curx = save_x;
+ win->_cury = save_y;
+}
+
+static int
+wadd_wch_literal(WINDOW *win, cchar_t ch)
+{
+ int x;
+ int y;
+ struct ldat *line;
+
+ x = win->_curx;
+ y = win->_cury;
+
+ CHECK_POSITION(win, x, y);
+
+ ch = render_char(win, ch);
+
+ line = win->_line + y;
+
+ CHANGED_CELL(line, x);
+
+ /*
+ * Non-spacing characters are added to the current cell.
+ *
+ * Spacing characters that are wider than one column require some display
+ * adjustments.
+ */
+ {
+ int len = wcwidth(CharOf(ch));
+ int i;
+ int j;
+ wchar_t *chars;
+
+ if (len == 0) { /* non-spacing */
+ if ((x > 0 && y >= 0)
+ || (win->_maxx >= 0 && win->_cury >= 1)) {
+ if (x > 0 && y >= 0)
+ chars = (win->_line[y].text[x - 1].chars);
+ else
+ chars = (win->_line[y - 1].text[win->_maxx].chars);
+ for (i = 0; i < CCHARW_MAX; ++i) {
+ if (chars[i] == 0) {
+ TR(TRACE_VIRTPUT,
+ ("added non-spacing %d: %x",
+ x, (int) CharOf(ch)));
+ chars[i] = CharOf(ch);
+ break;
+ }
+ }
}
- for (n = 0; n < PUTC_n; n++) {
- if ((code = waddch(win, UChar(PUTC_buf[n]) | attrs)) == ERR) {
+ goto testwrapping;
+ } else if (len > 1) { /* multi-column characters */
+ /*
+ * Check if the character will fit on the current line. If it does
+ * not fit, fill in the remainder of the line with blanks. and
+ * move to the next line.
+ */
+ if (len > win->_maxx + 1) {
+ TR(TRACE_VIRTPUT, ("character will not fit"));
+ return ERR;
+ } else if (x + len > win->_maxx + 1) {
+ int count = win->_maxx + 1 - x;
+ TR(TRACE_VIRTPUT, ("fill %d remaining cells", count));
+ fill_cells(win, count);
+ if (wrap_to_next_line(win) == ERR)
+ return ERR;
+ x = win->_curx;
+ y = win->_cury;
+ line = win->_line + y;
+ }
+ /*
+ * Check for cells which are orphaned by adding this character, set
+ * those to blanks.
+ *
+ * FIXME: this actually could fill j-i cells, more complicated to
+ * setup though.
+ */
+ for (i = 0; i < len; ++i) {
+ if (isWidecBase(win->_line[y].text[x + i])) {
+ break;
+ } else if (isWidecExt(win->_line[y].text[x + i])) {
+ for (j = i; x + j <= win->_maxx; ++j) {
+ if (!isWidecExt(win->_line[y].text[x + j])) {
+ TR(TRACE_VIRTPUT, ("fill %d orphan cells", j));
+ fill_cells(win, j);
+ break;
+ }
+ }
break;
}
}
- if (code == ERR)
- break;
+ /*
+ * Finally, add the cells for this character.
+ */
+ for (i = 0; i < len; ++i) {
+ cchar_t value = ch;
+ SetWidecExt(value, i);
+ TR(TRACE_VIRTPUT, ("multicolumn %d:%d (%d,%d)",
+ i + 1, len,
+ win->_begy + y, win->_begx + x));
+ line->text[x] = value;
+ CHANGED_CELL(line, x);
+ ++x;
+ }
+ goto testwrapping;
}
}
- TR(TRACE_VIRTPUT | TRACE_CCALLS, (T_RETURN("%d"), code));
- return (code);
+ /*
+ * Single-column characters.
+ */
+ line->text[x++] = ch;
+ /*
+ * This label is used only for wide-characters.
+ */
+ testwrapping:
+
+ TR(TRACE_VIRTPUT, ("cell (%ld, %ld..%d) = %s",
+ (long) win->_cury, (long) win->_curx, x - 1,
+ _tracech_t(CHREF(ch))));
+
+ if (x > win->_maxx) {
+ return wrap_to_next_line(win);
+ }
+ win->_curx = x;
+ return OK;
}
-NCURSES_EXPORT(int)
-wecho_wchar(WINDOW *win, const cchar_t *wch)
+static NCURSES_INLINE int
+wadd_wch_nosync(WINDOW *win, cchar_t ch)
+/* the workhorse function -- add a character to the given window */
{
- PUTC_DATA;
- int n;
- int code = ERR;
+ NCURSES_SIZE_T x, y;
+ wchar_t *s;
+ int tabsize = 8;
+#if USE_REENTRANT
+ SCREEN *sp = _nc_screen_of(win);
+#endif
- TR(TRACE_VIRTPUT | TRACE_CCALLS, (T_CALLED("wecho_wchar(%p, %s)"), win,
- _tracech_t(wch)));
-
- if (win != 0) {
- PUTC_INIT;
- for (PUTC_i = 0; PUTC_i < CCHARW_MAX; ++PUTC_i) {
- attr_t attrs = (wch->attr & A_ATTRIBUTES);
-
- if ((PUTC_ch = wch->chars[PUTC_i]) == L'\0')
- break;
- if ((PUTC_n = wcrtomb(PUTC_buf, PUTC_ch, &PUT_st)) <= 0) {
- code = ERR;
- if (is8bits(PUTC_ch))
- code = waddch(win, UChar(PUTC_ch) | attrs);
- break;
+ /*
+ * If we are using the alternate character set, forget about locale.
+ * Otherwise, if the locale * claims the code is printable, treat it that
+ * way.
+ */
+ if ((AttrOf(ch) & A_ALTCHARSET)
+ || iswprint(CharOf(ch)))
+ return wadd_wch_literal(win, ch);
+
+ /*
+ * Handle carriage control and other codes that are not printable, or are
+ * known to expand to more than one character according to unctrl().
+ */
+ x = win->_curx;
+ y = win->_cury;
+
+ switch (CharOf(ch)) {
+ case '\t':
+#if USE_REENTRANT
+ tabsize = *ptrTabsize(sp);
+#else
+ tabsize = TABSIZE;
+#endif
+ 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)) {
+ cchar_t blank = blankchar;
+ AddAttr(blank, AttrOf(ch));
+ while (win->_curx < x) {
+ if (wadd_wch_literal(win, blank) == ERR)
+ return (ERR);
}
- for (n = 0; n < PUTC_n; n++) {
- if ((code = waddch(win, UChar(PUTC_buf[n]) | attrs)) == ERR) {
- break;
+ break;
+ } else {
+ wclrtoeol(win);
+ win->_flags |= _WRAPPED;
+ if (newline_forces_scroll(win, &y)) {
+ x = win->_maxx;
+ if (win->_scroll) {
+ scroll(win);
+ x = 0;
}
+ } else {
+ x = 0;
+ }
+ }
+ break;
+ case '\n':
+ wclrtoeol(win);
+ if (newline_forces_scroll(win, &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:
+ if ((s = wunctrl(&ch)) != 0) {
+ while (*s) {
+ cchar_t sch;
+ SetChar(sch, *s++, AttrOf(ch));
+ if_EXT_COLORS(SetPair(sch, GetPair(ch)));
+ if (wadd_wch_literal(win, sch) == ERR)
+ return ERR;
}
- if (code == ERR)
- break;
+ return OK;
}
- wrefresh(win);
+ return ERR;
+ }
+
+ win->_curx = x;
+ win->_cury = y;
+
+ return OK;
+}
+
+/*
+ * The versions below call _nc_synchook(). 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)
+wadd_wch(WINDOW *win, const cchar_t *wch)
+{
+ int code = ERR;
+
+ TR(TRACE_VIRTPUT | TRACE_CCALLS, (T_CALLED("wadd_wch(%p, %s)"),
+ (void *) win,
+ _tracecchar_t(wch)));
+
+ if (win && (wadd_wch_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("wechochar(%p, %s)"),
+ (void *) win,
+ _tracecchar_t(wch)));
+
+ if (win && (wadd_wch_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);
+}
projects / ncurses.git / blobdiff