150276Speter/**************************************************************************** 2262685Sdelphij * Copyright (c) 1998-2010,2011 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/**************************************************************************** 30262629Sdelphij * Author: Thomas E. Dickey 1996-on * 31262629Sdelphij * and: Juergen Pfeifer * 3250276Speter ****************************************************************************/ 3350276Speter 3450276Speter#include <curses.priv.h> 3550276Speter 36262685SdelphijMODULE_ID("$Id: wresize.c,v 1.35 2011/05/21 18:55:07 tom Exp $") 3750276Speter 38166124Srafanstatic int 39166124Srafancleanup_lines(struct ldat *data, int length) 40166124Srafan{ 41166124Srafan while (--length >= 0) 42174993Srafan free(data[length].text); 43166124Srafan free(data); 44166124Srafan return ERR; 45166124Srafan} 46166124Srafan 4750276Speter/* 48166124Srafan * If we have reallocated the ldat structs, we will have to repair pointers 49166124Srafan * used in subwindows. 50166124Srafan */ 51166124Srafanstatic void 52166124Srafanrepair_subwindows(WINDOW *cmp) 53166124Srafan{ 54166124Srafan WINDOWLIST *wp; 55166124Srafan struct ldat *pline = cmp->_line; 56166124Srafan int row; 57262629Sdelphij#ifdef USE_SP_WINDOWLIST 58262629Sdelphij SCREEN *sp = _nc_screen_of(cmp); 59262629Sdelphij#endif 60166124Srafan 61184989Srafan _nc_lock_global(curses); 62174993Srafan 63262629Sdelphij for (each_window(SP_PARM, wp)) { 64166124Srafan WINDOW *tst = &(wp->win); 65166124Srafan 66166124Srafan if (tst->_parent == cmp) { 67166124Srafan 68166124Srafan if (tst->_pary > cmp->_maxy) 69166124Srafan tst->_pary = cmp->_maxy; 70166124Srafan if (tst->_parx > cmp->_maxx) 71166124Srafan tst->_parx = cmp->_maxx; 72166124Srafan 73166124Srafan if (tst->_maxy + tst->_pary > cmp->_maxy) 74262629Sdelphij tst->_maxy = (NCURSES_SIZE_T) (cmp->_maxy - tst->_pary); 75166124Srafan if (tst->_maxx + tst->_parx > cmp->_maxx) 76262629Sdelphij tst->_maxx = (NCURSES_SIZE_T) (cmp->_maxx - tst->_parx); 77166124Srafan 78166124Srafan for (row = 0; row <= tst->_maxy; ++row) { 79166124Srafan tst->_line[row].text = &pline[tst->_pary + row].text[tst->_parx]; 80166124Srafan } 81166124Srafan repair_subwindows(tst); 82166124Srafan } 83166124Srafan } 84184989Srafan _nc_unlock_global(curses); 85166124Srafan} 86166124Srafan 87166124Srafan/* 8850276Speter * Reallocate a curses WINDOW struct to either shrink or grow to the specified 8950276Speter * new lines/columns. If it grows, the new character cells are filled with 9050276Speter * blanks. The application is responsible for repainting the blank area. 9150276Speter */ 9276726SpeterNCURSES_EXPORT(int) 9350276Speterwresize(WINDOW *win, int ToLines, int ToCols) 9450276Speter{ 95166124Srafan int col, row, size_x, size_y; 9662449Speter struct ldat *pline; 97166124Srafan struct ldat *new_lines = 0; 9850276Speter 9950276Speter#ifdef TRACE 100262629Sdelphij T((T_CALLED("wresize(%p,%d,%d)"), (void *) win, ToLines, ToCols)); 10162449Speter if (win) { 102166124Srafan TR(TRACE_UPDATE, ("...beg (%ld, %ld), max(%ld,%ld), reg(%ld,%ld)", 103166124Srafan (long) win->_begy, (long) win->_begx, 104166124Srafan (long) win->_maxy, (long) win->_maxx, 105166124Srafan (long) win->_regtop, (long) win->_regbottom)); 106174993Srafan if (USE_TRACEF(TRACE_UPDATE)) { 10750276Speter _tracedump("...before", win); 108174993Srafan _nc_unlock_global(tracef); 109174993Srafan } 11062449Speter } 11150276Speter#endif 11250276Speter 11362449Speter if (!win || --ToLines < 0 || --ToCols < 0) 11462449Speter returnCode(ERR); 11550276Speter 11662449Speter size_x = win->_maxx; 11762449Speter size_y = win->_maxy; 11850276Speter 11962449Speter if (ToLines == size_y 12062449Speter && ToCols == size_x) 12162449Speter returnCode(OK); 12250276Speter 12362449Speter if ((win->_flags & _SUBWIN)) { 12450276Speter /* 12562449Speter * Check if the new limits will fit into the parent window's size. If 12662449Speter * not, do not resize. We could adjust the location of the subwindow, 12762449Speter * but the application may not like that. 12850276Speter */ 12962449Speter if (win->_pary + ToLines > win->_parent->_maxy 13062449Speter || win->_parx + ToCols > win->_parent->_maxx) { 13162449Speter returnCode(ERR); 13262449Speter } 13362449Speter pline = win->_parent->_line; 13462449Speter } else { 13562449Speter pline = 0; 13662449Speter } 13750276Speter 13862449Speter /* 139166124Srafan * Allocate new memory as needed. Do the allocations without modifying 140166124Srafan * the original window, in case an allocation fails. Always allocate 141166124Srafan * (at least temporarily) the array pointing to the individual lines. 14262449Speter */ 143166124Srafan new_lines = typeCalloc(struct ldat, (unsigned) (ToLines + 1)); 144166124Srafan if (new_lines == 0) 145166124Srafan returnCode(ERR); 14650276Speter 14762449Speter /* 148166124Srafan * For each line in the target, allocate or adjust pointers for the 149166124Srafan * corresponding text, depending on whether this is a window or a 150166124Srafan * subwindow. 15162449Speter */ 152166124Srafan for (row = 0; row <= ToLines; ++row) { 153166124Srafan int begin = (row > size_y) ? 0 : (size_x + 1); 15462449Speter int end = ToCols; 155166124Srafan NCURSES_CH_T *s; 15650276Speter 157166124Srafan if (!(win->_flags & _SUBWIN)) { 158166124Srafan if (row <= size_y) { 159166124Srafan if (ToCols != size_x) { 160262629Sdelphij s = typeMalloc(NCURSES_CH_T, (unsigned) ToCols + 1); 161262629Sdelphij if (s == 0) 162166124Srafan returnCode(cleanup_lines(new_lines, row)); 163166124Srafan for (col = 0; col <= ToCols; ++col) { 164166124Srafan s[col] = (col <= size_x 165166124Srafan ? win->_line[row].text[col] 166166124Srafan : win->_nc_bkgd); 167166124Srafan } 168166124Srafan } else { 169166124Srafan s = win->_line[row].text; 170166124Srafan } 17197049Speter } else { 172262629Sdelphij s = typeMalloc(NCURSES_CH_T, (unsigned) ToCols + 1); 173262629Sdelphij if (s == 0) 174166124Srafan returnCode(cleanup_lines(new_lines, row)); 175166124Srafan for (col = 0; col <= ToCols; ++col) 176166124Srafan s[col] = win->_nc_bkgd; 17762449Speter } 178262685Sdelphij } else if (pline != 0 && pline[win->_pary + row].text != 0) { 179262685Sdelphij s = &pline[win->_pary + row].text[win->_parx]; 180166124Srafan } else { 181262685Sdelphij s = 0; 182166124Srafan } 18350276Speter 184166124Srafan if_USE_SCROLL_HINTS(new_lines[row].oldindex = row); 185166124Srafan if (row <= size_y) { 186166124Srafan new_lines[row].firstchar = win->_line[row].firstchar; 187166124Srafan new_lines[row].lastchar = win->_line[row].lastchar; 188166124Srafan } 189166124Srafan if ((ToCols != size_x) || (row > size_y)) { 19062449Speter if (end >= begin) { /* growing */ 191166124Srafan if (new_lines[row].firstchar < begin) 192262629Sdelphij new_lines[row].firstchar = (NCURSES_SIZE_T) begin; 19362449Speter } else { /* shrinking */ 194166124Srafan new_lines[row].firstchar = 0; 19562449Speter } 196262629Sdelphij new_lines[row].lastchar = (NCURSES_SIZE_T) ToCols; 19750276Speter } 198166124Srafan new_lines[row].text = s; 19962449Speter } 20050276Speter 20162449Speter /* 202166124Srafan * Dispose of unwanted memory. 203166124Srafan */ 204166124Srafan if (!(win->_flags & _SUBWIN)) { 205166124Srafan if (ToCols == size_x) { 206166124Srafan for (row = ToLines + 1; row <= size_y; row++) { 207166124Srafan free(win->_line[row].text); 208166124Srafan } 209166124Srafan } else { 210166124Srafan for (row = 0; row <= size_y; row++) { 211166124Srafan free(win->_line[row].text); 212166124Srafan } 213166124Srafan } 214166124Srafan } 215166124Srafan 216166124Srafan free(win->_line); 217166124Srafan win->_line = new_lines; 218166124Srafan 219166124Srafan /* 22062449Speter * Finally, adjust the parameters showing screen size and cursor 22162449Speter * position: 22262449Speter */ 223262629Sdelphij win->_maxx = (NCURSES_SIZE_T) ToCols; 224262629Sdelphij win->_maxy = (NCURSES_SIZE_T) ToLines; 22550276Speter 22662449Speter if (win->_regtop > win->_maxy) 22762449Speter win->_regtop = win->_maxy; 22862449Speter if (win->_regbottom > win->_maxy 22962449Speter || win->_regbottom == size_y) 23062449Speter win->_regbottom = win->_maxy; 23150276Speter 23262449Speter if (win->_curx > win->_maxx) 23362449Speter win->_curx = win->_maxx; 23462449Speter if (win->_cury > win->_maxy) 23562449Speter win->_cury = win->_maxy; 23650276Speter 237166124Srafan /* 238166124Srafan * Check for subwindows of this one, and readjust pointers to our text, 239166124Srafan * if needed. 240166124Srafan */ 241166124Srafan repair_subwindows(win); 242166124Srafan 24350276Speter#ifdef TRACE 244166124Srafan TR(TRACE_UPDATE, ("...beg (%ld, %ld), max(%ld,%ld), reg(%ld,%ld)", 245166124Srafan (long) win->_begy, (long) win->_begx, 246166124Srafan (long) win->_maxy, (long) win->_maxx, 247166124Srafan (long) win->_regtop, (long) win->_regbottom)); 248174993Srafan if (USE_TRACEF(TRACE_UPDATE)) { 24962449Speter _tracedump("...after:", win); 250174993Srafan _nc_unlock_global(tracef); 251174993Srafan } 25250276Speter#endif 25362449Speter returnCode(OK); 25450276Speter} 255