/*
* If we have reallocated the ldat structs, we will have to repair pointers
* used in subwindows.
*/
static void
repair_subwindows(WINDOW *cmp)
{
WINDOWLIST *wp;
struct ldat *pline = cmp->_line;
int row;
_nc_lock_global(curses);
for (each_window(wp)) {
WINDOW *tst = &(wp->win);
if (tst->_parent == cmp) {
if (tst->_pary > cmp->_maxy)
tst->_pary = cmp->_maxy;
if (tst->_parx > cmp->_maxx)
tst->_parx = cmp->_maxx;
if (tst->_maxy + tst->_pary > cmp->_maxy)
tst->_maxy = cmp->_maxy - tst->_pary;
if (tst->_maxx + tst->_parx > cmp->_maxx)
tst->_maxx = cmp->_maxx - tst->_parx;
for (row = 0; row <= tst->_maxy; ++row) {
tst->_line[row].text = &pline[tst->_pary + row].text[tst->_parx];
}
repair_subwindows(tst);
}
}
_nc_unlock_global(curses);
}
/*
* If we have reallocated the ldat structs, we will have to repair pointers
* used in subwindows.
*/
static void
repair_subwindows(WINDOW *cmp)
{
WINDOWLIST *wp;
struct ldat *pline = cmp->_line;
int row;
for (wp = _nc_windows; wp != 0; wp = wp->next) {
WINDOW *tst = &(wp->win);
if (tst->_parent == cmp) {
if (tst->_pary > cmp->_maxy)
tst->_pary = cmp->_maxy;
if (tst->_parx > cmp->_maxx)
tst->_parx = cmp->_maxx;
if (tst->_maxy + tst->_pary > cmp->_maxy)
tst->_maxy = cmp->_maxy - tst->_pary;
if (tst->_maxx + tst->_parx > cmp->_maxx)
tst->_maxx = cmp->_maxx - tst->_parx;
for (row = 0; row <= tst->_maxy; ++row) {
tst->_line[row].text = &pline[tst->_pary + row].text[tst->_parx];
}
repair_subwindows(tst);
}
}
}
wresize(WINDOW *win, int ToLines, int ToCols)
{
int col, row, size_x, size_y;
struct ldat *pline;
struct ldat *new_lines = 0;
#ifdef TRACE
T((T_CALLED("wresize(%p,%d,%d)"), win, ToLines, ToCols));
if (win) {
TR(TRACE_UPDATE, ("...beg (%ld, %ld), max(%ld,%ld), reg(%ld,%ld)",
(long) win->_begy, (long) win->_begx,
(long) win->_maxy, (long) win->_maxx,
(long) win->_regtop, (long) win->_regbottom));
if (USE_TRACEF(TRACE_UPDATE)) {
_tracedump("...before", win);
_nc_unlock_global(tracef);
}
}
#endif
if (!win || --ToLines < 0 || --ToCols < 0)
returnCode(ERR);
size_x = win->_maxx;
size_y = win->_maxy;
if (ToLines == size_y
&& ToCols == size_x)
returnCode(OK);
if ((win->_flags & _SUBWIN)) {
/*
* Check if the new limits will fit into the parent window's size. If
* not, do not resize. We could adjust the location of the subwindow,
* but the application may not like that.
*/
if (win->_pary + ToLines > win->_parent->_maxy
|| win->_parx + ToCols > win->_parent->_maxx) {
returnCode(ERR);
}
pline = win->_parent->_line;
} else {
pline = 0;
}
/*
* Allocate new memory as needed. Do the allocations without modifying
* the original window, in case an allocation fails. Always allocate
* (at least temporarily) the array pointing to the individual lines.
*/
new_lines = typeCalloc(struct ldat, (unsigned) (ToLines + 1));
if (new_lines == 0)
returnCode(ERR);
/*
* For each line in the target, allocate or adjust pointers for the
* corresponding text, depending on whether this is a window or a
* subwindow.
*/
for (row = 0; row <= ToLines; ++row) {
int begin = (row > size_y) ? 0 : (size_x + 1);
int end = ToCols;
NCURSES_CH_T *s;
if (!(win->_flags & _SUBWIN)) {
if (row <= size_y) {
if (ToCols != size_x) {
if ((s = typeMalloc(NCURSES_CH_T, ToCols + 1)) == 0)
returnCode(cleanup_lines(new_lines, row));
for (col = 0; col <= ToCols; ++col) {
s[col] = (col <= size_x
? win->_line[row].text[col]
: win->_nc_bkgd);
}
} else {
s = win->_line[row].text;
}
} else {
if ((s = typeMalloc(NCURSES_CH_T, ToCols + 1)) == 0)
returnCode(cleanup_lines(new_lines, row));
for (col = 0; col <= ToCols; ++col)
s[col] = win->_nc_bkgd;
}
} else {
s = &pline[win->_pary + row].text[win->_parx];
}
if_USE_SCROLL_HINTS(new_lines[row].oldindex = row);
if (row <= size_y) {
new_lines[row].firstchar = win->_line[row].firstchar;
new_lines[row].lastchar = win->_line[row].lastchar;
}
if ((ToCols != size_x) || (row > size_y)) {
if (end >= begin) { /* growing */
if (new_lines[row].firstchar < begin)
new_lines[row].firstchar = begin;
} else { /* shrinking */
new_lines[row].firstchar = 0;
}
new_lines[row].lastchar = ToCols;
}
new_lines[row].text = s;
}
/*
* Dispose of unwanted memory.
*/
if (!(win->_flags & _SUBWIN)) {
if (ToCols == size_x) {
for (row = ToLines + 1; row <= size_y; row++) {
free(win->_line[row].text);
}
} else {
for (row = 0; row <= size_y; row++) {
free(win->_line[row].text);
}
}
}
free(win->_line);
win->_line = new_lines;
/*
* Finally, adjust the parameters showing screen size and cursor
* position:
*/
win->_maxx = ToCols;
win->_maxy = ToLines;
if (win->_regtop > win->_maxy)
win->_regtop = win->_maxy;
if (win->_regbottom > win->_maxy
|| win->_regbottom == size_y)
win->_regbottom = win->_maxy;
if (win->_curx > win->_maxx)
win->_curx = win->_maxx;
if (win->_cury > win->_maxy)
win->_cury = win->_maxy;
/*
* Check for subwindows of this one, and readjust pointers to our text,
* if needed.
*/
repair_subwindows(win);
#ifdef TRACE
TR(TRACE_UPDATE, ("...beg (%ld, %ld), max(%ld,%ld), reg(%ld,%ld)",
(long) win->_begy, (long) win->_begx,
(long) win->_maxy, (long) win->_maxx,
(long) win->_regtop, (long) win->_regbottom));
if (USE_TRACEF(TRACE_UPDATE)) {
_tracedump("...after:", win);
_nc_unlock_global(tracef);
}
#endif
returnCode(OK);
}
