/****************************************************************************
- * Copyright (c) 1998 Free Software Foundation, Inc. *
+ * 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 *
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
+ * and: Thomas E. Dickey 1996-on *
****************************************************************************/
-
-
/*
* lib_refresh.c
*
#include <curses.priv.h>
-MODULE_ID("$Id: lib_refresh.c,v 1.24 1999/07/31 11:36:37 juergen Exp $")
+MODULE_ID("$Id: lib_refresh.c,v 1.40 2007/07/07 22:08:38 tom Exp $")
-int wrefresh(WINDOW *win)
+NCURSES_EXPORT(int)
+wrefresh(WINDOW *win)
{
-int code;
+ int code;
- T((T_CALLED("wrefresh(%p)"), win));
+ T((T_CALLED("wrefresh(%p)"), win));
- if (win == curscr) {
- curscr->_clear = TRUE;
- code = doupdate();
- } else if ((code = wnoutrefresh(win)) == OK) {
- if (win->_clear)
- newscr->_clear = TRUE;
- code = doupdate();
- /*
- * Reset the clearok() flag in case it was set for the special
- * case in hardscroll.c (if we don't reset it here, we'll get 2
- * refreshes because the flag is copied from stdscr to newscr).
- * Resetting the flag shouldn't do any harm, anyway.
- */
- win->_clear = FALSE;
- }
- returnCode(code);
+ if (win == 0) {
+ code = ERR;
+ } else if (win == curscr) {
+ curscr->_clear = TRUE;
+ code = doupdate();
+ } else if ((code = wnoutrefresh(win)) == OK) {
+ if (win->_clear)
+ newscr->_clear = TRUE;
+ code = doupdate();
+ /*
+ * Reset the clearok() flag in case it was set for the special
+ * case in hardscroll.c (if we don't reset it here, we'll get 2
+ * refreshes because the flag is copied from stdscr to newscr).
+ * Resetting the flag shouldn't do any harm, anyway.
+ */
+ win->_clear = FALSE;
+ }
+ returnCode(code);
}
-int wnoutrefresh(WINDOW *win)
+NCURSES_EXPORT(int)
+wnoutrefresh(WINDOW *win)
{
-short limit_x;
-short i, j;
-short begx;
-short begy;
-short m, n;
-bool wide;
-
- T((T_CALLED("wnoutrefresh(%p)"), win));
+ NCURSES_SIZE_T limit_x;
+ NCURSES_SIZE_T src_row, src_col;
+ NCURSES_SIZE_T begx;
+ NCURSES_SIZE_T begy;
+ NCURSES_SIZE_T dst_row, dst_col;
+#if USE_SCROLL_HINTS
+ bool wide;
+#endif
+
+ T((T_CALLED("wnoutrefresh(%p)"), win));
#ifdef TRACE
- if (_nc_tracing & TRACE_UPDATE)
- _tracedump("...win", win);
+ if (_nc_tracing & TRACE_UPDATE)
+ _tracedump("...win", win);
#endif /* TRACE */
- /*
- * This function will break badly if we try to refresh a pad.
- */
- if ((win == 0)
- || (win->_flags & _ISPAD))
- returnCode(ERR);
+ /*
+ * This function will break badly if we try to refresh a pad.
+ */
+ if ((win == 0)
+ || (win->_flags & _ISPAD))
+ returnCode(ERR);
- /* put them here so "win == 0" won't break our code */
- begx = win->_begx;
- begy = win->_begy;
+ /* put them here so "win == 0" won't break our code */
+ begx = win->_begx;
+ begy = win->_begy;
- newscr->_bkgd = win->_bkgd;
- newscr->_attrs = win->_attrs;
+ newscr->_nc_bkgd = win->_nc_bkgd;
+ WINDOW_ATTRS(newscr) = WINDOW_ATTRS(win);
- /* merge in change information from all subwindows of this window */
- wsyncdown(win);
+ /* merge in change information from all subwindows of this window */
+ wsyncdown(win);
- /*
- * For pure efficiency, we'd want to transfer scrolling information
- * from the window to newscr whenever the window is wide enough that
- * its update will dominate the cost of the update for the horizontal
- * band of newscr that it occupies. Unfortunately, this threshold
- * tends to be complex to estimate, and in any case scrolling the
- * whole band and rewriting the parts outside win's image would look
- * really ugly. So. What we do is consider the window "wide" if it
- * either (a) occupies the whole width of newscr, or (b) occupies
- * all but at most one column on either vertical edge of the screen
- * (this caters to fussy people who put boxes around full-screen
- * windows). Note that changing this formula will not break any code,
- * merely change the costs of various update cases.
- */
- wide = (begx <= 1 && win->_maxx >= (newscr->_maxx - 1));
+#if USE_SCROLL_HINTS
+ /*
+ * For pure efficiency, we'd want to transfer scrolling information
+ * from the window to newscr whenever the window is wide enough that
+ * its update will dominate the cost of the update for the horizontal
+ * band of newscr that it occupies. Unfortunately, this threshold
+ * tends to be complex to estimate, and in any case scrolling the
+ * whole band and rewriting the parts outside win's image would look
+ * really ugly. So. What we do is consider the window "wide" if it
+ * either (a) occupies the whole width of newscr, or (b) occupies
+ * all but at most one column on either vertical edge of the screen
+ * (this caters to fussy people who put boxes around full-screen
+ * windows). Note that changing this formula will not break any code,
+ * merely change the costs of various update cases.
+ */
+ wide = (begx <= 1 && win->_maxx >= (newscr->_maxx - 1));
+#endif
- win->_flags &= ~_HASMOVED;
+ win->_flags &= ~_HASMOVED;
- /*
- * Microtweaking alert! This double loop is one of the genuine
- * hot spots in the code. Even gcc doesn't seem to do enough
- * common-subexpression chunking to make it really tense,
- * so we'll force the issue.
- */
+ /*
+ * Microtweaking alert! This double loop is one of the genuine
+ * hot spots in the code. Even gcc doesn't seem to do enough
+ * common-subexpression chunking to make it really tense,
+ * so we'll force the issue.
+ */
+
+ /* limit(dst_col) */
+ limit_x = win->_maxx;
+ /* limit(src_col) */
+ if (limit_x > newscr->_maxx - begx)
+ limit_x = newscr->_maxx - begx;
+
+ for (src_row = 0, dst_row = begy + win->_yoffset;
+ src_row <= win->_maxy && dst_row <= newscr->_maxy;
+ src_row++, dst_row++) {
+ register struct ldat *nline = &newscr->_line[dst_row];
+ register struct ldat *oline = &win->_line[src_row];
- /* limit(n) */
- limit_x = win->_maxx;
- /* limit(j) */
- if (limit_x > win->_maxx)
- limit_x = win->_maxx;
-
- for (i = 0, m = begy + win->_yoffset;
- i <= win->_maxy && m <= newscr->_maxy;
- i++, m++) {
- register struct ldat *nline = &newscr->_line[m];
- register struct ldat *oline = &win->_line[i];
-
- if (oline->firstchar != _NOCHANGE) {
- int last = oline->lastchar;
-
- if (last > limit_x)
- last = limit_x;
-
- for (j = oline->firstchar, n = j + begx; j <= last; j++, n++) {
- if (oline->text[j] != nline->text[n]) {
- nline->text[n] = oline->text[j];
- CHANGED_CELL(nline, n);
- }
+ if (oline->firstchar != _NOCHANGE) {
+ int last_src = oline->lastchar;
+
+ if (last_src > limit_x)
+ last_src = limit_x;
+
+ src_col = oline->firstchar;
+ dst_col = src_col + begx;
+
+ if_WIDEC({
+ register int j;
+
+ /*
+ * Ensure that we will copy complete multi-column characters
+ * on the left-boundary.
+ */
+ if (isWidecExt(oline->text[src_col])) {
+ j = 1 + dst_col - WidecExt(oline->text[src_col]);
+ if (j < 0)
+ j = 0;
+ if (dst_col > j) {
+ src_col -= (dst_col - j);
+ dst_col = j;
+ }
+ }
+
+ /*
+ * Ensure that we will copy complete multi-column characters
+ * on the right-boundary.
+ */
+ j = last_src;
+ if (WidecExt(oline->text[j])) {
+ ++j;
+ while (j <= limit_x) {
+ if (isWidecBase(oline->text[j])) {
+ break;
+ } else {
+ last_src = j;
}
+ ++j;
+ }
+ }
+ });
+ if_WIDEC({
+ static cchar_t blank = BLANK;
+ int last_dst = begx + ((last_src < win->_maxx)
+ ? last_src
+ : win->_maxx);
+ int fix_left = dst_col;
+ int fix_right = last_dst;
+ register int j;
+
+ /*
+ * Check for boundary cases where we may overwrite part of a
+ * multi-column character. For those, wipe the remainder of
+ * the character to blanks.
+ */
+ j = dst_col;
+ if (isWidecExt(nline->text[j])) {
+ /*
+ * On the left, we only care about multi-column characters
+ * that extend into the changed region.
+ */
+ fix_left = 1 + j - WidecExt(nline->text[j]);
+ if (fix_left < 0)
+ fix_left = 0; /* only if cell is corrupt */
}
-#if USE_SCROLL_HINTS
- if (wide) {
- int oind = oline->oldindex;
+ j = last_dst;
+ if (WidecExt(nline->text[j]) != 0) {
+ /*
+ * On the right, any multi-column character is a problem,
+ * unless it happens to be contained in the change, and
+ * ending at the right boundary of the change. The
+ * computation for 'fix_left' accounts for the left-side of
+ * this character. Find the end of the character.
+ */
+ ++j;
+ while (j <= newscr->_maxx && isWidecExt(nline->text[j])) {
+ fix_right = j++;
+ }
+ }
- nline->oldindex = (oind == _NEWINDEX) ? _NEWINDEX : begy + oind + win->_yoffset;
+ /*
+ * The analysis is simpler if we do the clearing afterwards.
+ * Do that now.
+ */
+ if (fix_left < dst_col || fix_right > last_dst) {
+ for (j = fix_left; j <= fix_right; ++j) {
+ nline->text[j] = blank;
+ CHANGED_CELL(nline, j);
+ }
}
-#endif /* USE_SCROLL_HINTS */
+ });
- oline->firstchar = oline->lastchar = _NOCHANGE;
- if_USE_SCROLL_HINTS(oline->oldindex = i);
- }
+ /*
+ * Copy the changed text.
+ */
+ for (; src_col <= last_src; src_col++, dst_col++) {
+ if (!CharEq(oline->text[src_col], nline->text[dst_col])) {
+ nline->text[dst_col] = oline->text[src_col];
+ CHANGED_CELL(nline, dst_col);
+ }
+ }
- if (win->_clear) {
- win->_clear = FALSE;
- newscr->_clear = TRUE;
}
+#if USE_SCROLL_HINTS
+ if (wide) {
+ int oind = oline->oldindex;
- if (! win->_leaveok) {
- newscr->_cury = win->_cury + win->_begy + win->_yoffset;
- newscr->_curx = win->_curx + win->_begx;
+ nline->oldindex = ((oind == _NEWINDEX)
+ ? _NEWINDEX
+ : (begy + oind + win->_yoffset));
}
- newscr->_leaveok = win->_leaveok;
-
+#endif /* USE_SCROLL_HINTS */
+
+ oline->firstchar = oline->lastchar = _NOCHANGE;
+ if_USE_SCROLL_HINTS(oline->oldindex = src_row);
+ }
+
+ if (win->_clear) {
+ win->_clear = FALSE;
+ newscr->_clear = TRUE;
+ }
+
+ if (!win->_leaveok) {
+ newscr->_cury = win->_cury + win->_begy + win->_yoffset;
+ newscr->_curx = win->_curx + win->_begx;
+ }
+ newscr->_leaveok = win->_leaveok;
+
#ifdef TRACE
- if (_nc_tracing & TRACE_UPDATE)
- _tracedump("newscr", newscr);
+ if (_nc_tracing & TRACE_UPDATE)
+ _tracedump("newscr", newscr);
#endif /* TRACE */
- returnCode(OK);
+ returnCode(OK);
}
projects / ncurses.git / blobdiff