diff options
Diffstat (limited to 'ncurses-5.3/ncurses/base/wresize.c')
-rw-r--r-- | ncurses-5.3/ncurses/base/wresize.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/ncurses-5.3/ncurses/base/wresize.c b/ncurses-5.3/ncurses/base/wresize.c new file mode 100644 index 0000000..7edad36 --- /dev/null +++ b/ncurses-5.3/ncurses/base/wresize.c @@ -0,0 +1,239 @@ +/**************************************************************************** + * Copyright (c) 1998-2001,2002 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 * + * "Software"), to deal in the Software without restriction, including * + * without limitation the rights to use, copy, modify, merge, publish, * + * distribute, distribute with modifications, sublicense, and/or sell * + * copies of the Software, and to permit persons to whom the Software is * + * furnished to do so, subject to the following conditions: * + * * + * The above copyright notice and this permission notice shall be included * + * in all copies or substantial portions of the Software. * + * * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * + * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * + * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * + * * + * Except as contained in this notice, the name(s) of the above copyright * + * holders shall not be used in advertising or otherwise to promote the * + * sale, use or other dealings in this Software without prior written * + * authorization. * + ****************************************************************************/ + +/**************************************************************************** + * Author: Thomas E. Dickey 1996-2002 * + ****************************************************************************/ + +#include <curses.priv.h> + +MODULE_ID("$Id$") + +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. + */ +NCURSES_EXPORT(int) +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 (%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("...before", win); + } +#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 (%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); +#endif + returnCode(OK); +} |