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https://github.com/Aigor44/ncursesw-morphos.git
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251 lines
7.9 KiB
C
251 lines
7.9 KiB
C
/****************************************************************************
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* Copyright (c) 1998-2008,2009 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/****************************************************************************
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* Author: Thomas E. Dickey 1996-on *
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* and: Juergen Pfeifer *
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****************************************************************************/
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#include <curses.priv.h>
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MODULE_ID("$Id: wresize.c,v 1.31 2009/05/23 19:50:16 tom Exp $")
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static int
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cleanup_lines(struct ldat *data, int length)
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{
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while (--length >= 0)
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free(data[length].text);
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free(data);
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return ERR;
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}
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/*
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* If we have reallocated the ldat structs, we will have to repair pointers
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* used in subwindows.
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*/
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static void
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repair_subwindows(WINDOW *cmp)
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{
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WINDOWLIST *wp;
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struct ldat *pline = cmp->_line;
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int row;
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#ifdef USE_SP_WINDOWLIST
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SCREEN *sp = _nc_screen_of(cmp);
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#endif
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_nc_lock_global(curses);
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for (each_window(SP_PARM, wp)) {
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WINDOW *tst = &(wp->win);
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if (tst->_parent == cmp) {
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if (tst->_pary > cmp->_maxy)
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tst->_pary = cmp->_maxy;
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if (tst->_parx > cmp->_maxx)
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tst->_parx = cmp->_maxx;
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if (tst->_maxy + tst->_pary > cmp->_maxy)
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tst->_maxy = cmp->_maxy - tst->_pary;
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if (tst->_maxx + tst->_parx > cmp->_maxx)
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tst->_maxx = cmp->_maxx - tst->_parx;
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for (row = 0; row <= tst->_maxy; ++row) {
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tst->_line[row].text = &pline[tst->_pary + row].text[tst->_parx];
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}
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repair_subwindows(tst);
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}
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}
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_nc_unlock_global(curses);
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}
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/*
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* Reallocate a curses WINDOW struct to either shrink or grow to the specified
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* new lines/columns. If it grows, the new character cells are filled with
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* blanks. The application is responsible for repainting the blank area.
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*/
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NCURSES_EXPORT(int)
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wresize(WINDOW *win, int ToLines, int ToCols)
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{
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int col, row, size_x, size_y;
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struct ldat *pline;
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struct ldat *new_lines = 0;
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#ifdef TRACE
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T((T_CALLED("wresize(%p,%d,%d)"), win, ToLines, ToCols));
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if (win) {
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TR(TRACE_UPDATE, ("...beg (%ld, %ld), max(%ld,%ld), reg(%ld,%ld)",
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(long) win->_begy, (long) win->_begx,
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(long) win->_maxy, (long) win->_maxx,
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(long) win->_regtop, (long) win->_regbottom));
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if (USE_TRACEF(TRACE_UPDATE)) {
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_tracedump("...before", win);
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_nc_unlock_global(tracef);
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}
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}
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#endif
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if (!win || --ToLines < 0 || --ToCols < 0)
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returnCode(ERR);
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size_x = win->_maxx;
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size_y = win->_maxy;
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if (ToLines == size_y
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&& ToCols == size_x)
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returnCode(OK);
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if ((win->_flags & _SUBWIN)) {
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/*
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* Check if the new limits will fit into the parent window's size. If
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* not, do not resize. We could adjust the location of the subwindow,
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* but the application may not like that.
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*/
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if (win->_pary + ToLines > win->_parent->_maxy
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|| win->_parx + ToCols > win->_parent->_maxx) {
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returnCode(ERR);
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}
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pline = win->_parent->_line;
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} else {
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pline = 0;
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}
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/*
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* Allocate new memory as needed. Do the allocations without modifying
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* the original window, in case an allocation fails. Always allocate
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* (at least temporarily) the array pointing to the individual lines.
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*/
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new_lines = typeCalloc(struct ldat, (unsigned) (ToLines + 1));
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if (new_lines == 0)
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returnCode(ERR);
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/*
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* For each line in the target, allocate or adjust pointers for the
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* corresponding text, depending on whether this is a window or a
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* subwindow.
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*/
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for (row = 0; row <= ToLines; ++row) {
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int begin = (row > size_y) ? 0 : (size_x + 1);
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int end = ToCols;
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NCURSES_CH_T *s;
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if (!(win->_flags & _SUBWIN)) {
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if (row <= size_y) {
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if (ToCols != size_x) {
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if ((s = typeMalloc(NCURSES_CH_T, ToCols + 1)) == 0)
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returnCode(cleanup_lines(new_lines, row));
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for (col = 0; col <= ToCols; ++col) {
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s[col] = (col <= size_x
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? win->_line[row].text[col]
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: win->_nc_bkgd);
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}
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} else {
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s = win->_line[row].text;
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}
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} else {
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if ((s = typeMalloc(NCURSES_CH_T, ToCols + 1)) == 0)
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returnCode(cleanup_lines(new_lines, row));
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for (col = 0; col <= ToCols; ++col)
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s[col] = win->_nc_bkgd;
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}
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} else {
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s = &pline[win->_pary + row].text[win->_parx];
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}
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if_USE_SCROLL_HINTS(new_lines[row].oldindex = row);
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if (row <= size_y) {
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new_lines[row].firstchar = win->_line[row].firstchar;
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new_lines[row].lastchar = win->_line[row].lastchar;
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}
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if ((ToCols != size_x) || (row > size_y)) {
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if (end >= begin) { /* growing */
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if (new_lines[row].firstchar < begin)
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new_lines[row].firstchar = begin;
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} else { /* shrinking */
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new_lines[row].firstchar = 0;
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}
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new_lines[row].lastchar = ToCols;
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}
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new_lines[row].text = s;
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}
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/*
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* Dispose of unwanted memory.
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*/
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if (!(win->_flags & _SUBWIN)) {
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if (ToCols == size_x) {
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for (row = ToLines + 1; row <= size_y; row++) {
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free(win->_line[row].text);
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}
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} else {
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for (row = 0; row <= size_y; row++) {
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free(win->_line[row].text);
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}
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}
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}
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free(win->_line);
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win->_line = new_lines;
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/*
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* Finally, adjust the parameters showing screen size and cursor
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* position:
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*/
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win->_maxx = ToCols;
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win->_maxy = ToLines;
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if (win->_regtop > win->_maxy)
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win->_regtop = win->_maxy;
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if (win->_regbottom > win->_maxy
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|| win->_regbottom == size_y)
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win->_regbottom = win->_maxy;
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if (win->_curx > win->_maxx)
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win->_curx = win->_maxx;
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if (win->_cury > win->_maxy)
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win->_cury = win->_maxy;
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/*
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* Check for subwindows of this one, and readjust pointers to our text,
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* if needed.
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*/
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repair_subwindows(win);
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#ifdef TRACE
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TR(TRACE_UPDATE, ("...beg (%ld, %ld), max(%ld,%ld), reg(%ld,%ld)",
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(long) win->_begy, (long) win->_begx,
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(long) win->_maxy, (long) win->_maxx,
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(long) win->_regtop, (long) win->_regbottom));
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if (USE_TRACEF(TRACE_UPDATE)) {
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_tracedump("...after:", win);
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_nc_unlock_global(tracef);
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}
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#endif
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returnCode(OK);
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}
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