mirror of
https://github.com/Aigor44/ncursesw-morphos.git
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471bc00736
+ add ncurses_mingw.h to installed headers (prompted by patch by Juergen Pfeifer). + clarify return-codes from wgetch() in response to SIGWINCH (prompted by Novell #769788). + modify resizeterm() to always push a KEY_RESIZE onto the fifo, even if screensize is unchanged. Modify _nc_update_screensize() to push a KEY_RESIZE if there was a SIGWINCH, even if it does not call resizeterm(). These changes eliminate the case where a SIGWINCH is received, but ERR returned from wgetch or wgetnstr because the screen dimensions did not change (Novell #769788).
531 lines
14 KiB
C
531 lines
14 KiB
C
/****************************************************************************
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* Copyright (c) 1998-2009,2011 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 *
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* and: Juergen Pfeifer *
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****************************************************************************/
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/*
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* This is an extension to the curses library. It provides callers with a hook
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* into the NCURSES data to resize windows, primarily for use by programs
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* running in an X Window terminal (e.g., xterm). I abstracted this module
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* from my application library for NCURSES because it must be compiled with
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* the private data structures -- T.Dickey 1995/7/4.
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*/
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#include <curses.priv.h>
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#ifndef CUR
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#define CUR SP_TERMTYPE
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#endif
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MODULE_ID("$Id: resizeterm.c,v 1.45 2012/07/07 17:07:23 tom Exp $")
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/*
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* If we're trying to be reentrant, do not want any local statics.
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*/
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#if USE_REENTRANT
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#define EXTRA_ARGS , CurLines, CurCols
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#define EXTRA_DCLS , int CurLines, int CurCols
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#else
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static int current_lines;
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static int current_cols;
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#define CurLines current_lines
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#define CurCols current_cols
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#define EXTRA_ARGS /* nothing */
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#define EXTRA_DCLS /* nothing */
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#endif
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#ifdef TRACE
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static void
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show_window_sizes(const char *name)
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{
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SCREEN *sp;
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WINDOWLIST *wp;
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_nc_lock_global(curses);
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for (each_screen(sp)) {
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_tracef("%s resizing: %p: %2d x %2d (%2d x %2d)", name, (void *) sp,
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*(ptrLines(sp)),
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*(ptrCols(sp)),
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screen_lines(sp), screen_columns(sp));
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for (each_window(sp, wp)) {
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_tracef(" window %p is %2ld x %2ld at %2ld,%2ld",
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(void *) &(wp->win),
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(long) wp->win._maxy + 1,
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(long) wp->win._maxx + 1,
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(long) wp->win._begy,
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(long) wp->win._begx);
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}
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}
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_nc_unlock_global(curses);
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}
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#endif
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/*
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* Return true if the given dimensions do not match the internal terminal
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* structure's size.
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*/
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NCURSES_EXPORT(bool)
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NCURSES_SP_NAME(is_term_resized) (NCURSES_SP_DCLx int ToLines, int ToCols)
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{
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T((T_CALLED("is_term_resized(%p, %d, %d)"), (void *) SP_PARM, ToLines, ToCols));
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returnCode(ToLines > 0
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&& ToCols > 0
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&& (ToLines != screen_lines(SP_PARM)
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|| ToCols != screen_columns(SP_PARM)));
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}
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#if NCURSES_SP_FUNCS
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NCURSES_EXPORT(bool)
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is_term_resized(int ToLines, int ToCols)
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{
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return NCURSES_SP_NAME(is_term_resized) (CURRENT_SCREEN, ToLines, ToCols);
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}
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#endif
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/*
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*/
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static ripoff_t *
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ripped_window(WINDOW *win)
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{
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ripoff_t *result = 0;
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ripoff_t *rop;
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if (win != 0) {
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#ifdef USE_SP_RIPOFF
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SCREEN *sp = _nc_screen_of(win);
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#endif
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for (each_ripoff(rop)) {
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if (rop->win == win && rop->line != 0) {
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result = rop;
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break;
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}
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}
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}
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return result;
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}
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/*
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* Returns the number of lines from the bottom for the beginning of a ripped
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* off window.
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*/
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static int
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ripped_bottom(WINDOW *win)
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{
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int result = 0;
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ripoff_t *rop;
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if (win != 0) {
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#ifdef USE_SP_RIPOFF
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SCREEN *sp = _nc_screen_of(win);
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#endif
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for (each_ripoff(rop)) {
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if (rop->line < 0) {
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result -= rop->line;
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if (rop->win == win) {
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break;
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}
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}
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}
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}
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return result;
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}
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/*
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* Return the number of levels of child-windows under the current window.
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*/
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static int
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child_depth(WINDOW *cmp)
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{
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int depth = 0;
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if (cmp != 0) {
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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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WINDOWLIST *wp;
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for (each_window(sp, wp)) {
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WINDOW *tst = &(wp->win);
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if (tst->_parent == cmp) {
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depth = 1 + child_depth(tst);
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break;
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}
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}
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}
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return depth;
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}
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/*
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* Return the number of levels of parent-windows above the current window.
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*/
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static int
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parent_depth(WINDOW *cmp)
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{
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int depth = 0;
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if (cmp != 0) {
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WINDOW *tst;
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while ((tst = cmp->_parent) != 0) {
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++depth;
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cmp = tst;
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}
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}
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return depth;
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}
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/*
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* FIXME: must adjust position so it's within the parent!
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*/
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static int
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adjust_window(WINDOW *win, int ToLines, int ToCols, int stolen EXTRA_DCLS)
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{
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int result;
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int bottom = CurLines + _nc_screen_of(win)->_topstolen - stolen;
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int myLines = win->_maxy + 1;
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int myCols = win->_maxx + 1;
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ripoff_t *rop = ripped_window(win);
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T((T_CALLED("adjust_window(%p,%d,%d)%s depth %d/%d currently %ldx%ld at %ld,%ld"),
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(void *) win, ToLines, ToCols,
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(rop != 0) ? " (rip)" : "",
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parent_depth(win),
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child_depth(win),
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(long) getmaxy(win), (long) getmaxx(win),
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(long) getbegy(win) + win->_yoffset, (long) getbegx(win)));
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if (rop != 0 && rop->line < 0) {
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/*
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* If it is a ripped-off window at the bottom of the screen, simply
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* move it to the same relative position.
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*/
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win->_begy = (NCURSES_SIZE_T) (ToLines - ripped_bottom(win) - 0 - win->_yoffset);
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if (rop->hook == _nc_slk_initialize)
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_nc_format_slks(
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#if NCURSES_SP_FUNCS
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_nc_screen_of(win),
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#endif
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ToCols);
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} else if (win->_begy >= bottom) {
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/*
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* If it is below the bottom of the new screen, move up by the same
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* amount that the screen shrank.
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*/
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win->_begy = (NCURSES_SIZE_T) (win->_begy + (ToLines - CurLines));
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} else {
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if (myLines == (CurLines - stolen)
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&& ToLines != CurLines) {
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myLines = ToLines - stolen;
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} else if (myLines == CurLines
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&& ToLines != CurLines) {
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myLines = ToLines;
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}
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}
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if (myLines > ToLines) {
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myLines = ToLines;
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}
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if (myCols > ToCols)
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myCols = ToCols;
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if (myCols == CurCols
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&& ToCols != CurCols)
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myCols = ToCols;
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result = wresize(win, myLines, myCols);
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returnCode(result);
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}
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/*
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* If we're decreasing size, recursively search for windows that have no
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* children, decrease those to fit, then decrease the containing window, etc.
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*/
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static int
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decrease_size(NCURSES_SP_DCLx int ToLines, int ToCols, int stolen EXTRA_DCLS)
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{
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bool found;
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int depth = 0;
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WINDOWLIST *wp;
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T((T_CALLED("decrease_size(%p, %d, %d)"), (void *) SP_PARM, ToLines, ToCols));
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do {
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found = FALSE;
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TR(TRACE_UPDATE, ("decreasing size of windows to %dx%d, depth=%d",
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ToLines, ToCols, depth));
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for (each_window(SP_PARM, wp)) {
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WINDOW *win = &(wp->win);
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if (!(win->_flags & _ISPAD)) {
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if (child_depth(win) == depth) {
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found = TRUE;
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if (adjust_window(win, ToLines, ToCols,
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stolen EXTRA_ARGS) != OK)
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returnCode(ERR);
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}
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}
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}
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++depth;
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} while (found);
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returnCode(OK);
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}
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/*
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* If we're increasing size, recursively search for windows that have no
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* parent, increase those to fit, then increase the contained window, etc.
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*/
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static int
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increase_size(NCURSES_SP_DCLx int ToLines, int ToCols, int stolen EXTRA_DCLS)
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{
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bool found;
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int depth = 0;
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WINDOWLIST *wp;
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T((T_CALLED("increase_size(%p, %d, %d)"), (void *) SP_PARM, ToLines, ToCols));
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do {
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found = FALSE;
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TR(TRACE_UPDATE, ("increasing size of windows to %dx%d, depth=%d",
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ToLines, ToCols, depth));
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for (each_window(SP_PARM, wp)) {
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WINDOW *win = &(wp->win);
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if (!(win->_flags & _ISPAD)) {
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if (parent_depth(win) == depth) {
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found = TRUE;
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if (adjust_window(win, ToLines, ToCols,
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stolen EXTRA_ARGS) != OK)
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returnCode(ERR);
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}
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}
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}
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++depth;
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} while (found);
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returnCode(OK);
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}
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/*
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* This function reallocates NCURSES window structures, with no side-effects
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* such as ungetch().
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*/
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NCURSES_EXPORT(int)
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NCURSES_SP_NAME(resize_term) (NCURSES_SP_DCLx int ToLines, int ToCols)
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{
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int result = OK EXTRA_ARGS;
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int was_stolen;
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T((T_CALLED("resize_term(%p,%d,%d) old(%d,%d)"),
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(void *) SP_PARM, ToLines, ToCols,
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(SP_PARM == 0) ? -1 : screen_lines(SP_PARM),
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(SP_PARM == 0) ? -1 : screen_columns(SP_PARM)));
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if (SP_PARM == 0) {
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returnCode(ERR);
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}
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_nc_nonsp_lock_global(curses);
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was_stolen = (screen_lines(SP_PARM) - SP_PARM->_lines_avail);
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if (NCURSES_SP_NAME(is_term_resized) (NCURSES_SP_ARGx ToLines, ToCols)) {
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int myLines = CurLines = screen_lines(SP_PARM);
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int myCols = CurCols = screen_columns(SP_PARM);
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#ifdef TRACE
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if (USE_TRACEF(TRACE_UPDATE)) {
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show_window_sizes("before");
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_nc_unlock_global(tracef);
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}
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#endif
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if (ToLines > screen_lines(SP_PARM)) {
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result = increase_size(NCURSES_SP_ARGx
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myLines = ToLines,
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myCols,
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was_stolen EXTRA_ARGS);
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CurLines = myLines;
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CurCols = myCols;
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}
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if ((result == OK)
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&& (ToCols > screen_columns(SP_PARM))) {
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result = increase_size(NCURSES_SP_ARGx
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myLines,
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myCols = ToCols,
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was_stolen EXTRA_ARGS);
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CurLines = myLines;
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CurCols = myCols;
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}
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if ((result == OK)
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&& (ToLines < myLines ||
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ToCols < myCols)) {
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result = decrease_size(NCURSES_SP_ARGx
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ToLines,
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ToCols,
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was_stolen EXTRA_ARGS);
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}
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if (result == OK) {
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screen_lines(SP_PARM) = (NCURSES_SIZE_T) ToLines;
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screen_columns(SP_PARM) = (NCURSES_SIZE_T) ToCols;
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#ifdef USE_TERM_DRIVER
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CallDriver_2(SP_PARM, setsize, ToLines, ToCols);
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#else
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lines = (NCURSES_SIZE_T) ToLines;
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columns = (NCURSES_SIZE_T) ToCols;
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#endif
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SP_PARM->_lines_avail = (NCURSES_SIZE_T) (ToLines - was_stolen);
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if (SP_PARM->oldhash) {
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FreeAndNull(SP_PARM->oldhash);
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}
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if (SP_PARM->newhash) {
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FreeAndNull(SP_PARM->newhash);
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}
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#ifdef TRACE
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if (USE_TRACEF(TRACE_UPDATE)) {
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SET_LINES(ToLines - was_stolen);
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SET_COLS(ToCols);
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show_window_sizes("after");
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_nc_unlock_global(tracef);
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}
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#endif
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}
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}
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if (result == OK) {
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/*
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* Always update LINES, to allow for call from lib_doupdate.c which
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* needs to have the count adjusted by the stolen (ripped off) lines.
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*/
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SET_LINES(ToLines - was_stolen);
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SET_COLS(ToCols);
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}
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_nc_nonsp_unlock_global(curses);
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returnCode(result);
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}
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#if NCURSES_SP_FUNCS
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NCURSES_EXPORT(int)
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resize_term(int ToLines, int ToCols)
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{
|
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int res = ERR;
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_nc_sp_lock_global(curses);
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res = NCURSES_SP_NAME(resize_term) (CURRENT_SCREEN, ToLines, ToCols);
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_nc_sp_unlock_global(curses);
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return (res);
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}
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#endif
|
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|
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/*
|
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* This function reallocates NCURSES window structures. It is invoked in
|
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* response to a SIGWINCH interrupt. Other user-defined windows may also need
|
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* to be reallocated.
|
|
*
|
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* Because this performs memory allocation, it should not (in general) be
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* invoked directly from the signal handler.
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*/
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NCURSES_EXPORT(int)
|
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NCURSES_SP_NAME(resizeterm) (NCURSES_SP_DCLx int ToLines, int ToCols)
|
|
{
|
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int result = ERR;
|
|
|
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T((T_CALLED("resizeterm(%p, %d,%d) old(%d,%d)"),
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(void *) SP_PARM, ToLines, ToCols,
|
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(SP_PARM == 0) ? -1 : screen_lines(SP_PARM),
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(SP_PARM == 0) ? -1 : screen_columns(SP_PARM)));
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|
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if (SP_PARM != 0) {
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result = OK;
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SP_PARM->_sig_winch = FALSE;
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|
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if (NCURSES_SP_NAME(is_term_resized) (NCURSES_SP_ARGx ToLines, ToCols)) {
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#if USE_SIGWINCH
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ripoff_t *rop;
|
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bool slk_visible = (SP_PARM != 0
|
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&& SP_PARM->_slk != 0
|
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&& !(SP_PARM->_slk->hidden));
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|
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if (slk_visible) {
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slk_clear();
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}
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#endif
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result = NCURSES_SP_NAME(resize_term) (NCURSES_SP_ARGx ToLines, ToCols);
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|
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#if USE_SIGWINCH
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clearok(CurScreen(SP_PARM), TRUE); /* screen contents are unknown */
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|
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/* ripped-off lines are a special case: if we did not lengthen
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* them, we haven't moved them either. repaint them, too.
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|
*
|
|
* for the rest - stdscr and other windows - the client has to
|
|
* decide which to repaint, since without panels, ncurses does
|
|
* not know which are really on top.
|
|
*/
|
|
for (each_ripoff(rop)) {
|
|
if (rop->win != StdScreen(SP_PARM)
|
|
&& rop->win != 0
|
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&& rop->line < 0) {
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|
|
if (rop->hook != _nc_slk_initialize) {
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|
touchwin(rop->win);
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|
wnoutrefresh(rop->win);
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|
}
|
|
}
|
|
}
|
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|
|
/* soft-keys are a special case: we _know_ how to repaint them */
|
|
if (slk_visible) {
|
|
NCURSES_SP_NAME(slk_restore) (NCURSES_SP_ARG);
|
|
NCURSES_SP_NAME(slk_touch) (NCURSES_SP_ARG);
|
|
NCURSES_SP_NAME(slk_refresh) (NCURSES_SP_ARG);
|
|
}
|
|
#endif
|
|
}
|
|
#if USE_SIGWINCH
|
|
safe_ungetch(SP_PARM, KEY_RESIZE); /* so application can know this */
|
|
#endif
|
|
}
|
|
|
|
returnCode(result);
|
|
}
|
|
|
|
#if NCURSES_SP_FUNCS
|
|
NCURSES_EXPORT(int)
|
|
resizeterm(int ToLines, int ToCols)
|
|
{
|
|
return NCURSES_SP_NAME(resizeterm) (CURRENT_SCREEN, ToLines, ToCols);
|
|
}
|
|
#endif
|