150276Speter/**************************************************************************** 2178866Srafan * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. * 350276Speter * * 450276Speter * Permission is hereby granted, free of charge, to any person obtaining a * 550276Speter * copy of this software and associated documentation files (the * 650276Speter * "Software"), to deal in the Software without restriction, including * 750276Speter * without limitation the rights to use, copy, modify, merge, publish, * 850276Speter * distribute, distribute with modifications, sublicense, and/or sell * 950276Speter * copies of the Software, and to permit persons to whom the Software is * 1050276Speter * furnished to do so, subject to the following conditions: * 1150276Speter * * 1250276Speter * The above copyright notice and this permission notice shall be included * 1350276Speter * in all copies or substantial portions of the Software. * 1450276Speter * * 1550276Speter * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 1650276Speter * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 1750276Speter * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 1850276Speter * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 1950276Speter * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 2050276Speter * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 2150276Speter * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 2250276Speter * * 2350276Speter * Except as contained in this notice, the name(s) of the above copyright * 2450276Speter * holders shall not be used in advertising or otherwise to promote the * 2550276Speter * sale, use or other dealings in this Software without prior written * 2650276Speter * authorization. * 2750276Speter ****************************************************************************/ 2850276Speter 2950276Speter/**************************************************************************** 30166124Srafan * Author: Thomas E. Dickey 1996-2002 * 3150276Speter ****************************************************************************/ 3250276Speter 3350276Speter#include <curses.priv.h> 3450276Speter 35184989SrafanMODULE_ID("$Id: wresize.c,v 1.29 2008/06/07 13:59:01 tom Exp $") 3650276Speter 37166124Srafanstatic int 38166124Srafancleanup_lines(struct ldat *data, int length) 39166124Srafan{ 40166124Srafan while (--length >= 0) 41174993Srafan free(data[length].text); 42166124Srafan free(data); 43166124Srafan return ERR; 44166124Srafan} 45166124Srafan 4650276Speter/* 47166124Srafan * If we have reallocated the ldat structs, we will have to repair pointers 48166124Srafan * used in subwindows. 49166124Srafan */ 50166124Srafanstatic void 51166124Srafanrepair_subwindows(WINDOW *cmp) 52166124Srafan{ 53166124Srafan WINDOWLIST *wp; 54166124Srafan struct ldat *pline = cmp->_line; 55166124Srafan int row; 56166124Srafan 57184989Srafan _nc_lock_global(curses); 58174993Srafan 59178866Srafan for (each_window(wp)) { 60166124Srafan WINDOW *tst = &(wp->win); 61166124Srafan 62166124Srafan if (tst->_parent == cmp) { 63166124Srafan 64166124Srafan if (tst->_pary > cmp->_maxy) 65166124Srafan tst->_pary = cmp->_maxy; 66166124Srafan if (tst->_parx > cmp->_maxx) 67166124Srafan tst->_parx = cmp->_maxx; 68166124Srafan 69166124Srafan if (tst->_maxy + tst->_pary > cmp->_maxy) 70166124Srafan tst->_maxy = cmp->_maxy - tst->_pary; 71166124Srafan if (tst->_maxx + tst->_parx > cmp->_maxx) 72166124Srafan tst->_maxx = cmp->_maxx - tst->_parx; 73166124Srafan 74166124Srafan for (row = 0; row <= tst->_maxy; ++row) { 75166124Srafan tst->_line[row].text = &pline[tst->_pary + row].text[tst->_parx]; 76166124Srafan } 77166124Srafan repair_subwindows(tst); 78166124Srafan } 79166124Srafan } 80184989Srafan _nc_unlock_global(curses); 81166124Srafan} 82166124Srafan 83166124Srafan/* 8450276Speter * Reallocate a curses WINDOW struct to either shrink or grow to the specified 8550276Speter * new lines/columns. If it grows, the new character cells are filled with 8650276Speter * blanks. The application is responsible for repainting the blank area. 8750276Speter */ 8876726SpeterNCURSES_EXPORT(int) 8950276Speterwresize(WINDOW *win, int ToLines, int ToCols) 9050276Speter{ 91166124Srafan int col, row, size_x, size_y; 9262449Speter struct ldat *pline; 93166124Srafan struct ldat *new_lines = 0; 9450276Speter 9550276Speter#ifdef TRACE 9662449Speter T((T_CALLED("wresize(%p,%d,%d)"), win, ToLines, ToCols)); 9762449Speter if (win) { 98166124Srafan TR(TRACE_UPDATE, ("...beg (%ld, %ld), max(%ld,%ld), reg(%ld,%ld)", 99166124Srafan (long) win->_begy, (long) win->_begx, 100166124Srafan (long) win->_maxy, (long) win->_maxx, 101166124Srafan (long) win->_regtop, (long) win->_regbottom)); 102174993Srafan if (USE_TRACEF(TRACE_UPDATE)) { 10350276Speter _tracedump("...before", win); 104174993Srafan _nc_unlock_global(tracef); 105174993Srafan } 10662449Speter } 10750276Speter#endif 10850276Speter 10962449Speter if (!win || --ToLines < 0 || --ToCols < 0) 11062449Speter returnCode(ERR); 11150276Speter 11262449Speter size_x = win->_maxx; 11362449Speter size_y = win->_maxy; 11450276Speter 11562449Speter if (ToLines == size_y 11662449Speter && ToCols == size_x) 11762449Speter returnCode(OK); 11850276Speter 11962449Speter if ((win->_flags & _SUBWIN)) { 12050276Speter /* 12162449Speter * Check if the new limits will fit into the parent window's size. If 12262449Speter * not, do not resize. We could adjust the location of the subwindow, 12362449Speter * but the application may not like that. 12450276Speter */ 12562449Speter if (win->_pary + ToLines > win->_parent->_maxy 12662449Speter || win->_parx + ToCols > win->_parent->_maxx) { 12762449Speter returnCode(ERR); 12862449Speter } 12962449Speter pline = win->_parent->_line; 13062449Speter } else { 13162449Speter pline = 0; 13262449Speter } 13350276Speter 13462449Speter /* 135166124Srafan * Allocate new memory as needed. Do the allocations without modifying 136166124Srafan * the original window, in case an allocation fails. Always allocate 137166124Srafan * (at least temporarily) the array pointing to the individual lines. 13862449Speter */ 139166124Srafan new_lines = typeCalloc(struct ldat, (unsigned) (ToLines + 1)); 140166124Srafan if (new_lines == 0) 141166124Srafan returnCode(ERR); 14250276Speter 14362449Speter /* 144166124Srafan * For each line in the target, allocate or adjust pointers for the 145166124Srafan * corresponding text, depending on whether this is a window or a 146166124Srafan * subwindow. 14762449Speter */ 148166124Srafan for (row = 0; row <= ToLines; ++row) { 149166124Srafan int begin = (row > size_y) ? 0 : (size_x + 1); 15062449Speter int end = ToCols; 151166124Srafan NCURSES_CH_T *s; 15250276Speter 153166124Srafan if (!(win->_flags & _SUBWIN)) { 154166124Srafan if (row <= size_y) { 155166124Srafan if (ToCols != size_x) { 156166124Srafan if ((s = typeMalloc(NCURSES_CH_T, ToCols + 1)) == 0) 157166124Srafan returnCode(cleanup_lines(new_lines, row)); 158166124Srafan for (col = 0; col <= ToCols; ++col) { 159166124Srafan s[col] = (col <= size_x 160166124Srafan ? win->_line[row].text[col] 161166124Srafan : win->_nc_bkgd); 162166124Srafan } 163166124Srafan } else { 164166124Srafan s = win->_line[row].text; 165166124Srafan } 16697049Speter } else { 167166124Srafan if ((s = typeMalloc(NCURSES_CH_T, ToCols + 1)) == 0) 168166124Srafan returnCode(cleanup_lines(new_lines, row)); 169166124Srafan for (col = 0; col <= ToCols; ++col) 170166124Srafan s[col] = win->_nc_bkgd; 17162449Speter } 172166124Srafan } else { 173166124Srafan s = &pline[win->_pary + row].text[win->_parx]; 174166124Srafan } 17550276Speter 176166124Srafan if_USE_SCROLL_HINTS(new_lines[row].oldindex = row); 177166124Srafan if (row <= size_y) { 178166124Srafan new_lines[row].firstchar = win->_line[row].firstchar; 179166124Srafan new_lines[row].lastchar = win->_line[row].lastchar; 180166124Srafan } 181166124Srafan if ((ToCols != size_x) || (row > size_y)) { 18262449Speter if (end >= begin) { /* growing */ 183166124Srafan if (new_lines[row].firstchar < begin) 184166124Srafan new_lines[row].firstchar = begin; 18562449Speter } else { /* shrinking */ 186166124Srafan new_lines[row].firstchar = 0; 18762449Speter } 188166124Srafan new_lines[row].lastchar = ToCols; 18950276Speter } 190166124Srafan new_lines[row].text = s; 19162449Speter } 19250276Speter 19362449Speter /* 194166124Srafan * Dispose of unwanted memory. 195166124Srafan */ 196166124Srafan if (!(win->_flags & _SUBWIN)) { 197166124Srafan if (ToCols == size_x) { 198166124Srafan for (row = ToLines + 1; row <= size_y; row++) { 199166124Srafan free(win->_line[row].text); 200166124Srafan } 201166124Srafan } else { 202166124Srafan for (row = 0; row <= size_y; row++) { 203166124Srafan free(win->_line[row].text); 204166124Srafan } 205166124Srafan } 206166124Srafan } 207166124Srafan 208166124Srafan free(win->_line); 209166124Srafan win->_line = new_lines; 210166124Srafan 211166124Srafan /* 21262449Speter * Finally, adjust the parameters showing screen size and cursor 21362449Speter * position: 21462449Speter */ 21562449Speter win->_maxx = ToCols; 21662449Speter win->_maxy = ToLines; 21750276Speter 21862449Speter if (win->_regtop > win->_maxy) 21962449Speter win->_regtop = win->_maxy; 22062449Speter if (win->_regbottom > win->_maxy 22162449Speter || win->_regbottom == size_y) 22262449Speter win->_regbottom = win->_maxy; 22350276Speter 22462449Speter if (win->_curx > win->_maxx) 22562449Speter win->_curx = win->_maxx; 22662449Speter if (win->_cury > win->_maxy) 22762449Speter win->_cury = win->_maxy; 22850276Speter 229166124Srafan /* 230166124Srafan * Check for subwindows of this one, and readjust pointers to our text, 231166124Srafan * if needed. 232166124Srafan */ 233166124Srafan repair_subwindows(win); 234166124Srafan 23550276Speter#ifdef TRACE 236166124Srafan TR(TRACE_UPDATE, ("...beg (%ld, %ld), max(%ld,%ld), reg(%ld,%ld)", 237166124Srafan (long) win->_begy, (long) win->_begx, 238166124Srafan (long) win->_maxy, (long) win->_maxx, 239166124Srafan (long) win->_regtop, (long) win->_regbottom)); 240174993Srafan if (USE_TRACEF(TRACE_UPDATE)) { 24162449Speter _tracedump("...after:", win); 242174993Srafan _nc_unlock_global(tracef); 243174993Srafan } 24450276Speter#endif 24562449Speter returnCode(OK); 24650276Speter} 247