- int code = ERR;
- int x, y;
- chtype new_bkgd = ch;
-
- T((T_CALLED("wbkgd(%p,%s)"), win, _tracechtype(new_bkgd)));
-
- if (win) {
- chtype old_bkgd = getbkgd(win);
-
- wbkgdset(win, new_bkgd);
- wattrset(win, AttrOf(win->_bkgd));
-
- for (y = 0; y <= win->_maxy; y++) {
- for (x = 0; x <= win->_maxx; x++) {
- if (win->_line[y].text[x] == old_bkgd)
- win->_line[y].text[x] = win->_bkgd;
- else
- win->_line[y].text[x] =
- _nc_render(win,(A_ALTCHARSET &
- AttrOf(win->_line[y].text[x]))
- | TextOf(win->_line[y].text[x]));
- }
+#undef SP_PARM
+#define SP_PARM SP /* to use Charable() */
+ int code = ERR;
+
+ T((T_CALLED("wbkgd(%p,%s)"), (void *) win, _tracech_t(ch)));
+
+ if (SP == 0) {
+ ;
+ } else if (win) {
+ NCURSES_CH_T new_bkgd = CHDEREF(ch);
+ NCURSES_CH_T old_bkgd;
+ int y;
+ NCURSES_CH_T old_char;
+ attr_t old_attr;
+ int old_pair;
+ NCURSES_CH_T new_char;
+ attr_t new_attr;
+ int new_pair;
+
+ /* SVr4 trims color info if non-color terminal */
+ if (!SP->_pair_limit) {
+ RemAttr(new_bkgd, A_COLOR);
+ SetPair(new_bkgd, 0);
+ }
+
+ /* avoid setting background-character to a null */
+ if (CharOf(new_bkgd) == 0) {
+ NCURSES_CH_T tmp_bkgd = blank;
+ SetAttr(tmp_bkgd, AttrOf(new_bkgd));
+ SetPair(tmp_bkgd, GetPair(new_bkgd));
+ new_bkgd = tmp_bkgd;
+ }
+
+ memset(&old_bkgd, 0, sizeof(old_bkgd));
+ (void) wgetbkgrnd(win, &old_bkgd);
+
+ if (!memcmp(&old_bkgd, &new_bkgd, sizeof(new_bkgd))) {
+ T(("...unchanged"));
+ returnCode(OK);
+ }
+
+ old_char = old_bkgd;
+ RemAttr(old_char, ~A_CHARTEXT);
+ old_attr = AttrOf(old_bkgd);
+ old_pair = GetPair(old_bkgd);
+
+ if (!(old_attr & A_COLOR)) {
+ old_pair = 0;
+ }
+ T(("... old background char %s, attr %s, pair %d",
+ _tracechar(CharOf(old_char)), _traceattr(old_attr), old_pair));
+
+ new_char = new_bkgd;
+ RemAttr(new_char, ~A_CHARTEXT);
+ new_attr = AttrOf(new_bkgd);
+ new_pair = GetPair(new_bkgd);
+
+ /* SVr4 limits background character to printable 7-bits */
+ if (!Charable(new_bkgd)) {
+ new_char = old_char;
+ }
+ if (!(new_attr & A_COLOR)) {
+ new_pair = 0;
+ }
+ T(("... new background char %s, attr %s, pair %d",
+ _tracechar(CharOf(new_char)), _traceattr(new_attr), new_pair));
+
+ (void) wbkgrndset(win, CHREF(new_bkgd));
+
+ /* SVr4 updates color pair if old/new match, otherwise just attrs */
+ if ((new_pair != 0) && (new_pair == old_pair)) {
+ WINDOW_ATTRS(win) = new_attr;
+ SET_WINDOW_PAIR(win, new_pair);
+ } else {
+ WINDOW_ATTRS(win) = new_attr;
+ }
+
+ for (y = 0; y <= win->_maxy; y++) {
+ int x;
+
+ for (x = 0; x <= win->_maxx; x++) {
+ NCURSES_CH_T *cp = &(win->_line[y].text[x]);
+ int tmp_pair = GetPair(*cp);
+ attr_t tmp_attr = AttrOf(*cp);
+
+ if (CharEq(*cp, old_bkgd)) {
+ SetChar2(*cp, CharOf(new_char));
+ }
+ if (tmp_pair != 0) {
+ if (tmp_pair == old_pair) {
+ SetAttr(*cp, (tmp_attr & ~old_attr) | new_attr);
+ SetPair(*cp, new_pair);
+ } else {
+ SetAttr(*cp,
+ (tmp_attr & (~old_attr | A_COLOR))
+ | (new_attr & ALL_BUT_COLOR));
+ }
+ } else {
+ SetAttr(*cp, (tmp_attr & ~old_attr) | new_attr);
+ SetPair(*cp, new_pair);
+ }
+ }
+ }
+ touchwin(win);
+ _nc_synchook(win);
+ code = OK;