/****************************************************************************
- * Copyright (c) 1998 Free Software Foundation, Inc. *
+ * Copyright (c) 1998-2002,2006 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: Thomas E. Dickey <dickey@clark.net> 1996,1997 *
+ * Author: Thomas E. Dickey 1996-2002 *
****************************************************************************/
#include <curses.priv.h>
-MODULE_ID("$Id: wresize.c,v 1.12 1999/02/27 18:57:31 tom Exp $")
+MODULE_ID("$Id: wresize.c,v 1.24 2006/10/14 20:43:31 tom Exp $")
+
+static int
+cleanup_lines(struct ldat *data, int length)
+{
+ while (--length >= 0)
+ free(data->text);
+ free(data);
+ return ERR;
+}
+
+/*
+ * 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);
+ }
+ }
+}
/*
* Reallocate a curses WINDOW struct to either shrink or grow to the specified
* new lines/columns. If it grows, the new character cells are filled with
* blanks. The application is responsible for repainting the blank area.
*/
-
-#define DOALLOC(p,t,n) typeRealloc(t, n, p)
-#define ld_ALLOC(p,n) DOALLOC(p,struct ldat,n)
-#define c_ALLOC(p,n) DOALLOC(p,chtype,n)
-
-int
+NCURSES_EXPORT(int)
wresize(WINDOW *win, int ToLines, int ToCols)
{
- register int row;
- int size_x, size_y;
- struct ldat *pline;
- chtype blank;
+ 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 (%d, %d), max(%d,%d), reg(%d,%d)",
- win->_begy, win->_begx,
- win->_maxy, win->_maxx,
- win->_regtop, win->_regbottom));
- if (_nc_tracing & TRACE_UPDATE)
+ 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 (_nc_tracing & TRACE_UPDATE)
_tracedump("...before", win);
- }
+ }
#endif
- if (!win || --ToLines < 0 || --ToCols < 0)
- returnCode(ERR);
+ if (!win || --ToLines < 0 || --ToCols < 0)
+ returnCode(ERR);
- size_x = win->_maxx;
- size_y = win->_maxy;
+ size_x = win->_maxx;
+ size_y = win->_maxy;
- if (ToLines == size_y
- && ToCols == size_x)
- returnCode(OK);
-
- pline = (win->_flags & _SUBWIN) ? win->_parent->_line : 0;
+ if (ToLines == size_y
+ && ToCols == size_x)
+ returnCode(OK);
+ if ((win->_flags & _SUBWIN)) {
/*
- * If the number of lines has changed, adjust the size of the overall
- * vector:
+ * 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 (ToLines != size_y) {
- if (! (win->_flags & _SUBWIN)) {
- for (row = ToLines+1; row <= size_y; row++)
- free((char *)(win->_line[row].text));
- }
-
- win->_line = ld_ALLOC(win->_line, ToLines+1);
- if (win->_line == 0)
- returnCode(ERR);
-
- for (row = size_y+1; row <= ToLines; row++) {
- win->_line[row].text = 0;
- win->_line[row].firstchar = 0;
- win->_line[row].lastchar = ToCols;
- if ((win->_flags & _SUBWIN)) {
- win->_line[row].text =
- &pline[win->_begy + row].text[win->_begx];
- }
- }
+ if (win->_pary + ToLines > win->_parent->_maxy
+ || win->_parx + ToCols > win->_parent->_maxx) {
+ returnCode(ERR);
}
-
- /*
- * Adjust the width of the columns:
- */
- blank = _nc_background(win);
- for (row = 0; row <= ToLines; row++) {
- chtype *s = win->_line[row].text;
- int begin = (s == 0) ? 0 : size_x + 1;
- int end = ToCols;
-
- if_USE_SCROLL_HINTS(win->_line[row].oldindex = row);
-
- if (ToCols != size_x || s == 0) {
- if (! (win->_flags & _SUBWIN)) {
- win->_line[row].text = s = c_ALLOC(s, ToCols+1);
- if (win->_line[row].text == 0)
- returnCode(ERR);
- } else if (s == 0) {
- win->_line[row].text = s =
- &pline[win->_begy + row].text[win->_begx];
- }
-
- if (end >= begin) { /* growing */
- if (win->_line[row].firstchar < begin)
- win->_line[row].firstchar = begin;
- win->_line[row].lastchar = ToCols;
- do {
- s[end] = blank;
- } while (--end >= begin);
- } else { /* shrinking */
- win->_line[row].firstchar = 0;
- win->_line[row].lastchar = ToCols;
- }
+ 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];
}
- /*
- * 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;
+ 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 (%d, %d), max(%d,%d), reg(%d,%d)",
- win->_begy, win->_begx,
- win->_maxy, win->_maxx,
- win->_regtop, win->_regbottom));
- if (_nc_tracing & TRACE_UPDATE)
- _tracedump("...after:", 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 (_nc_tracing & TRACE_UPDATE)
+ _tracedump("...after:", win);
#endif
- returnCode(OK);
+ returnCode(OK);
}
projects / ncurses.git / blobdiff